Object of the invention

The object of the presented solution is a pedal arrangement. A further object of the presented solution is an electric vehicle including a pedal arrangement.

Background of the invention

In vehicles based on mechanical or electric implementation, it is possible, by means of pedals moved by a person, to generate mechanical energy needed for the advancing of the vehicle and/or generate electric energy needed by the vehicle’s electric system or drive transmission. It is possible to execute the pedals, for example, by pedal cranks based on continuous rotational movement and pedals, which are rotated around a hub in the vehicle frame. By means of a power transmission apparatus cou pled to the pedals, for example, a chain pulley and a chain, it is possible to transmit the mechanical energy of the pedals elsewhere to the vehicle and to be used there in a desired way.

Embodiments of vehicles are very different and thus there is a need for vehicles and their pedal arrangements, which are compact, reliable to operate and applicable to be used, for example, in vehicles based on an electric drive transmission.

Summary of the invention The pedal arrangement of the presented solution is presented in the enclosed claim 1.

The pedal arrangement of the presented solution is also presented in the enclosed claim 17.

The electric vehicle of the presented solution including a pedal arrangement is also presented in the enclosed claim 23. Advantages of the presented pedal arrangement are slight use of space, because the pedal movement is based on reciprocating movement instead of rotating motion. This also makes possible the compact structure of the pedal arrangement, because the com ponents of the pedal arrangement and the components of the associated mechanical power transmission apparatus can be placed in the proximity of or adjacent to the pedals, when needed, because the movement of the pedals is limited. Thus, also the components of the pedal arrangement become simpler.

The length of the pedal cranks of the presented pedal arrangement can be fitted longer than that of rotating pedal cranks, when the same space is available. Thus, the pedal force generated by the user achieves a larger torque and kinetic energy with longer pedal cranks, which is utilised, for example, in a generator.

The presented pedal arrangement makes also possible to place two pedal pairs side by side and to couple them into the same, common power transmission shaft. The presented pedal arrangement makes possible the placing of components associated with the pedal arrangement into a place, in which they are not in the way of the vehi cle’s driver, for example, in the legroom of the vehicle.

The said pedal arrangement makes it possible to convert the generated mechanical energy into electric energy by means of a generator coupled to the pedal arrangement. The pedal arrangement makes it possible to place the generator and associated me chanical power transmission apparatus more freely and in a compact form, as the mechanical energy generated by the pedals is not exploited in the drive transmission of the vehicle, but only in the generation of electric energy.

With the presented pedal arrangement, the vertical movement of the user’s knees is smaller than with rotating pedal cranks, which makes it possible to place the vehicle controls, such as the steering wheel, into a place which is optimal for the user’s hands and taking into account safe driving and ergonomics. The knee movement may even only be a third compared to the knee movement caused by rotating pedal cranks. The space reserved for the movement of feet, especially the legroom and its height in particular may thus be smaller than with rotating pedal cranks. This makes possible, among others, high clearance and even base of the vehicle.

Short description of drawings

The present solution is next explained by simultaneously referring to the enclosed figures and reference numbers of their different components.

Figure 1 illustrates a pedal arrangement of the presented solution, seen obliquely from above, being essentially horizontal in its one position of use.

Figure 2 illustrates a detail of the pedal arrangement of Figure 1 seen from above. Figure 3 illustrates an electric vehicle of the solution, in which the pedal arrangement of the presented solution is applied, shown as a simplified schematic view and seen from above.

Figure 4 illustrates the implementation of a detail of the pedal arrangement of Figure 1 in accordance with an alternative example, seen obliquely from above, being essen tially horizontal in its one position of use.

Figure 5 illustrates the implementation of a detail of the pedal arrangement of Figure 1 in accordance with an alternative example.

Figure 6 illustrates the implementation of a second detail of the pedal arrangement of Figure 1 in accordance with an alternative example.

Detailed specification of different examples of the invention

The pedal arrangement of the presented solution is intended especially for vehicles; for example, for electric vehicles.

The pedal arrangement 64 of the presented solution comprises a first power transmis sion shaft 10, to which at least one pair of pedal cranks 12, 16 is coupled, to which pedals 14, 18 in turn have been connected.

The first power transmission shaft 10 defines a fictitious first rotation axis XI, and it is adapted to rotate at least in a first direction of rotation Rl about the rotation axis XL The rotation axis XI in question is most appropriately parallel to the longitudinal direction of the power transmission shaft 10.

In its position of use, the power transmission shaft 10 is, for example, essentially horizontal.

The first pedal crank 12 has a first end, which is coupled to the first power transmis sion shaft 10, and a second end, to which the first pedal 14 is rotatably connected for a user’s foot. The first pedal crank 12 is adapted to perform reciprocating rotary movement in relation to the first rotation axis XL The movement of the pedal is cur vilinear and limited to occur between two different angular positions.

The second pedal crank 16 has a first end, which is connected to the first power trans mission shaft 10, and a second end, to which the second pedal 18 is rotatably con nected for the user’s other foot. The second pedal crank 12 is adapted to perform reciprocating rotary movement in relation to the first rotation axis XL According to one example, the movement of the pedals 14, 18 is curvilinear and lim ited to occur between two different angular positions. When the first pedal 14 is in one angular position, the second pedal is in the second angular position. The pedals 14, 18 move in opposite directions.

According to one example, the pedal arrangement further comprises a generator 22, which is coupled to the first power transmission shaft 10 via a mechanical power transmission apparatus 24.

The generator 22 is, for example, of the type, in which there is an input shaft 54 to rotate the generator and which is adapted to convert the mechanical energy of the rotary movement of the input shaft 54 into electric energy. The generator 22 is, for example, shaped as a disc with its input shaft 54 in its hub. The generator 22 or its input shaft 54 defines a fictitious third rotation axis X3. It is most preferable that the rotation axis X3 is parallel to the rotation axis XI and/or a rotation axis X2.

The mechanical power transmission apparatus 24 is adapted to convert the rotary movement of the power transmission shaft 10 into rotary movement occurring in the generator 22; for example, into the rotary movement of its input shaft 54.

According to one example, the pedal arrangement further comprises synchronisation elements 20, which are connected to the first pedal crank 12 on the one hand, and to the second pedal crank 16 on the other hand. The synchronisation elements 20 are adapted to force the first pedal crank 12 to move in a second direction of rotation R2 while the second pedal crank 16 is simultaneously forced by the user to move in the first direction of rotation Rl, which is opposite to the second direction of rotation R2. The synchronisation elements 20 are further adapted to force the second pedal crank 16 to move in the second direction of rotation R2 while the first pedal crank 12 is simultaneously forced by the user to move in the first direction of rotation Rl.

According to one example, the synchronisation elements comprise a first push rod 26, which is articulatedly connected to the first pedal crank 12, and a second push rod 28, which is articulatedly connected to the second pedal crank 16, and a rigid lever 30, a first end of which is articulatedly connected to the first push rod 26 and a second end of which is articulatedly connected to the second push rod 28. According to an example, the lever 30 is adapted to be coupled so that its first and second ends can move back and forth. For example, in a middle section of the lever 30 there are con nection elements 56 for connecting it articulatedly, for example, to a vehicle frame. The movement of the lever 30 is limited to occur between two different angular po sitions.

As the first pedal crank 12 moves in the first direction of rotation Rl, the first push rod 26 is adapted to force the lever 30 to turn and simultaneously push the second push rod 28, which in turn forces the second pedal crank 16 to return and move in the second direction of rotation R2.

As the second pedal crank 16 moves in the first direction of rotation Rl, the second push rod 28 is in turn adapted to force the lever 30 to turn in the direction, which is opposite in relation to the above-mentioned lever movement, and simultaneously push the first push rod 26, which again forces the first pedal crank 12 to return and move in the second direction of rotation R2.

The return of the pedal most preferably refers to a movement, in which the pedal moves towards the user and, at the same time, the user’s knee bends. The user moves the pedal by pushing it away from oneself, most preferably by stretching the leg.

According to one example, the first pedal crank 12 is connected to the first power transmission shaft 10 with such a clutch arrangement 52, which first of all forces the first power transmission shaft 10 to rotate in the first direction of rotation Rl while the first pedal crank 12 simultaneously also moves in the first direction of rotation Rl. In addition to this, the said clutch arrangement 52 allows the rotation of the first power transmission shaft 10 to continue in the first direction of rotation Rl at the same time as the first pedal crank 12 is immobile or moves in the second direction of rotation R2.

In the example above, the second pedal crank 16 is additionally connected to the first power transmission shaft 10 with a second clutch arrangement 52, which first of all forces the first power transmission shaft 10 to rotate in the first direction of rotation Rl at the same time as the second pedal crank 16 also moves in the first direction of rotation Rl. In addition to this, the said clutch arrangement allows the rotation of the first power transmission shaft 10 to continue in the first direction of rotation Rl while the second pedal crank 16 is simultaneously immobile or it moves in the second di rection of rotation R2.

By means of the clutch arrangements 52 described above, it is possible to maintain the continuous rotary movement of the first power transmission shaft 10 in the first direction of rotation Rl at the same time as the pedals move back and forth and the user applies force alternately to the pedals. According to one example, the above-mentioned clutch arrangement 52 comprises a freewheel clutch, which rotates freely in one direction of rotation, most preferably in the second direction of rotation R2, and to transmit the rotary movement, for example, to the first power transmission shaft 10, it locks when rotating in the opposite direc tion of rotation, most preferably in the first direction of rotation Rl. This makes pos sible the rotation of the first power transmission shaft 10 by pushing a pedal, and the pedal can return freely while it simultaneously allows the first power transmission shaft 10 to be rotated by means of the push movement of another pedal.

According to one example, the mechanical power transmission apparatus 24 is adapted to form a predetermined fixed transmission ratio between an input shaft and an output shaft. In this solution, the input shaft is the first power transmission shaft 10 and the output shaft is a rotating component of the generator 22, for example, its rotor or, most preferably, the input shaft 54 of the generator 22.

According to one example, to execute the desired fixed transmission ratio, the me chanical power transmission apparatus 24 comprises a second power transmission shaft 34, which defines the fictitious second rotation axis X2 and which is fitted to rotate about the second rotation axis X2. The first power transmission shaft 10 is simultaneously adapted to rotate the second power transmission shaft 34 by means of a chain 38 or a belt or similar. To the second power transmission shaft 34 there may be coupled a belt pulley 60, to which the chain 38, the belt or similar is connected.

In the example above, the mechanical power transmission apparatus 24 further com prises a second chain pulley 36 or a belt pulley or similar, which is connected to the second power transmission shaft 34 and adapted to rotate simultaneously with the second power transmission shaft 34. The said second chain pulley 36 or the belt pul ley or similar is adapted to simultaneously rotate the generator 22, for example, its input shaft 54. To the generator 22, for example, its input shaft 54, there may be coupled a belt pulley 58, to which a chain 42, a belt or similar is connected.

According to one example, the mechanical power transmission apparatus 24 further comprises a gearing with stepless or stepped operation so that the said transmission ratio can be selected to be stepless or stepped. The gearing is, for example, automat ically adjustable, electrically or mechanically controllable.

According to one example, the mechanical power transmission apparatus 24 com prises a first chain pulley 32 or a belt pulley or similar, which is coupled to the first power transmission shaft 10. The said first chain pulley 32 or the belt pulley or similar may be located between the first pedal crank 12 and the second pedal crank 16. This makes possible compact placing and the first power transmission shaft 10 to be short.

The said first chain pulley 32 or the belt pulley or similar may be adapted to simulta neously rotate with the first power transmission shaft 10, and it is fitted to simultane ously rotate the said second power transmission shaft 34 via the said chain 38, the belt or similar.

According to one example, the first power transmission shaft 10 is essentially parallel to the second power transmission shaft 34. In addition, they are most preferably hor izontal.

According to one example, as the pedal arrangement is in its one position of use, the first pedal crank 12 and second pedal crank 16 are suspended below the first power transmission shaft 10 and adapted to perform there the said reciprocating movement. This provides unobstructed space for the user’s feet and their movement.

According to one example, as the pedal arrangement is in its above-mentioned posi tion of use, the generator 22 is, observed in a horizontal direction, located on that side of the first power transmission shaft 10, in the direction of the side of which the first and second pedal cranks 12, 16 move when they rotate in the first direction of rotation Rl. This makes possible that the user and the generator are on different sides of the first power transmission shaft 10, thus providing more unobstructed space for the user.

According to one example, as the pedal arrangement is in its above-mentioned posi tion of use, the synchronisation elements 20 are, observed in a horizontal direction, located on that side of the first power transmission shaft 10, in the direction of the side of which the first and second pedal cranks 12, 16 move when they in their turn rotate in the first direction of rotation Rl.

According to one example, the transmission ratio of the said mechanical power trans mission apparatus 24 is adapted to set the rotational speed of the generator 22, for example the rotational speed of its input shaft 54, to be multiple in relation to the rotational speed of the first power transmission shaft 10.

According to one example, the pedal arrangement further has several bearing units 40, each of which comprises a bearing housing, via which the bearing unit is con nected to the first or second power transmission shaft 10, 34, and additionally a support part, via which the first or second power transmission shaft 10, 34 is attach able to a desired place; for example, a vehicle frame, for example its structures above the legroom in the frame.

The said pedal arrangement may be for one user or for two users that are side by side. In the latter case, the pedal arrangement further comprises a second pair of pedals.

In this case, the pedal arrangement further comprises a third pedal crank 44, which has a first end connected to the first power transmission shaft 10, and a second end, to which a third pedal 46 is rotatably coupled for the foot of the second user. The third pedal crank 44 is adapted to perform reciprocating rotary movement in relation to the first rotation axis XL The pedal movement is curvilinear and limited to occur between two different angular positions.

In this case, the pedal arrangement further comprises a fourth pedal crank 48, which has a first end connected to the first power transmission shaft 10, and a second end, to which a fourth pedal 50 is rotatably coupled for the other foot of the second user. The fourth pedal crank 48 is adapted to perform reciprocating rotary movement in relation to the first rotating axis XL

According to one example, the movement of the pedals 46, 50 is curvilinear and lim ited to occur between two different angular positions. When the third pedal 46 is in one angular position, the third pedal 50 is in the second angular position. The pedals 48, 50 move in opposite directions.

According to one example, the place of the pedal 14, 18, 46, 50 at the end of the pedal crank 12, 16, 44, 48 and, at the same time, its distance from the first power transmis sion shaft 10 and the first rotation axis XI is adjustable either in a stepless or stepwise manner. This is done, for example, by means of fastening elements for the pedals 14, 18, 46, 48. For the pedal 14, 18, 46, 48 there are, for example, three alternative fas tening points, for example, at 30 mm intervals. This makes possible the adjustment of the pedal arrangement 64 and especially the pedals 14, 18, 46, 48 to suit different users so that, for example, the dimensions and paths of the user’s foot, leg or body can be taken into account.

An electric vehicle 62, in which the pedal arrangement 64 presented above may be applied, comprises a frame 76. The pedal arrangement 64 is attached to the frame 76 and fitted into its position of use. According to one example, the electric vehicle 62 further has a seat 70 for a pedalling person and legroom in the frame 76 for the per son’s feet. The pedals 46, 50 are located in the legroom. In the placement of the pedal arrangement 64, the positions of use and placing prin ciples for the pedal arrangement 64 may be applied, which are described above. This makes possible, for example, the compact structure and spacious legroom for the user, as has been described above.

It is most preferable that the first power transmission shaft 10, i.e. the first rotation axis XI is located in the upper section of the legroom above the first and second pedal cranks 12, 16 so that, in the position of use, it is essentially horizontal and transverse, or essentially perpendicular to the longitudinal direction Y1 of the frame 76. This way the power transmission shaft 10 is located above the pedals 46, 50 and the user’s feet. A respective placement is most preferably used also for the third and fourth pedal cranks 46, 50.

It is also most preferable that, observed in a horizontal direction, the generator 22 is located on the opposite side of the first power transmission shaft 10, i.e. the first ro tation axis XI in relation to the seat 70.

According to one example, also the said mechanical power transmission apparatus 24 and/or the said synchronisation elements 20 are, observed in a horizontal direction, located on the opposite side of the first power transmission shaft 10, i.e. the first ro tation axis XI in relation to the seat 70, and in this case they are, for example, together with the generator 22 on the same side of the power transmission shaft 10, i.e. on the same side of the first rotation axis XL

According to one example, the pedal arrangement 64 is adapted to utilise mechanical energy in the generator 22 but, for example, not in a mechanical drive transmission, by means of which the electric vehicle 62 would move. The purpose of the pedal arrangement 64 is, for example, to generate electric energy by means of the generator 22, which is stored, for example, to a storage battery 72 and/or utilised, for example, in an electric transmission system 78. A simple, compact structure is thus achieved, as it is not necessary to take into account, for example, a mechanical drive transmis sion in the pedal arrangement 64.

According to one example, the pedal arrangement 64, the first power transmission shaft 10 and the mechanical power transmission apparatus 24 are fitted separately from the said electric transmission system 78 and to convert mechanical energy into electric energy by means of the generator 22, which is used to move the electric ve hicle 62. For example, to store electric energy, the generator 22 for the pedal arrangement 64 is coupled to the storage battery 72, for example, by means of an electronic control unit 74.

According to one example, at least three or four wheels 66 are rotatably coupled to the frame 76, to at least one of which there is attached the electric transmission system 78 to move the electric vehicle 62. Also, the storage battery 72 for storing electric energy and/or supplying electric energy to the electric transmission system 78 may be located in the frame 76.

The electronic control unit 74 may also be installed in the frame 76, the electronic control unit controlling the operation of the storage battery 72 and/or the electric transmission system 78. With apparatuses and controls coupled to the electronic con trol unit 74, the user can, for example, control the operation of the electric vehicle 62, for example, during driving.

According to one example, the electric vehicle 62 has two seats 70 side by side, for either one or two pedalling persons, and legroom in the frame 76 for the persons’ feet. The electric vehicle 62 may further include controls 68, such as a steering wheel to control the direction of travel of the electric vehicle 62. The position of the controls 68 may be adjustable. The legroom observed in a horizontal direction and in the lon gitudinal direction Y1 of the frame 76 is located in front of the seat 70 and the first and second pedal cranks 12, 16 of the pedal arrangement 64 are placed in the legroom. The said longitudinal direction Y1 is simultaneously the direction, with which the pedalling person is aligned when sitting in the seat 70, while the feet are in the leg- room.

According to one example, as the pedal arrangement 64 comprises the third and fourth pedal cranks 44 and 48 in the manner presented above, each pedal crank 44, 48 is coupled to the first power transmission shaft 10 with such a clutch arrangement 52, which corresponds to the examples and functions presented in connection with the first and second pedal cranks 12, 16.

In other words, the third pedal crank 44 is coupled to the first power transmission shaft 10 with such a clutch arrangement 52 which, first of all, forces the first power transmission shaft 10 to rotate in the first direction of rotation R1 at the same time as the third pedal crank 44 moves in the first direction of rotation Rl. In addition to this, the said clutch arrangement 52 allows the rotation of the power transmission shaft 10 to continue in the first direction of rotation Rl, while the third pedal crank 44 is im mobile or it moves in the second direction of rotation Rl.

In the example above, the fourth pedal crank 48 is further coupled to the first power transmission shaft 10 with such a second clutch arrangement 52 which, first of all, forces the first power transmission shaft 10 to rotate in the first direction of rotation Rl at the same time as the fourth pedal crank 48 moves in the first direction of rotation Rl. In addition to this, the said clutch arrangement 52 allows the rotation of the first power transmission shaft 10 to continue in the first direction of rotation Rl, while the fourth pedal crank 48 is immobile or it moves in the second direction of rotation R2.

With the clutch arrangements 52 described above, it is possible to maintain the con tinuous rotary movement of the first power transmission shaft 10 in the first direction of rotation Rl at the same time as the pedals move back and forth and the user applies forces alternately to the pedals 46, 50.

In the examples described above, the pedal arrangement 64 comprises either only the solution according to the first and second pedal cranks 12, 16, in a manner in accord ance with the examples presented above, or in addition to the solution in question, also the solution according to the third and fourth pedal cranks 44, 48, in a manner in accordance with the examples presented above; in other words, the pedal cranks 12, 16, 44 and 48.

The terms first, second, third and fourth used in the specification below and referring to different components do not define or limit the total quantity of these components, but they only distinguish the components from each other, for example so that the references“first” and“second” are separate components.

In accordance with Figure 4, according to an alternative example of the presented solution, the pedal arrangement 64 further comprises an additional power transmis sion shaft 110. To the additional power transmission shaft 110 there is coupled at least one pair of pedal cranks. For example, the pedal cranks 12 and 16 presented above, their clutch elements 52 and synchronisation elements 20 are coupled to the additional power transmission shaft 110 instead of the first power transmission shaft 10. The additional power transmission shaft 110 is forced into rotary movement by means of the reciprocating movement of the pedal cranks 12, 16 in the way presented above.

The additional power transmission shaft 110 defines a fictitious additional rotation axis X101 and it is adapted to rotate about the additional rotation axis X101 at least in a third direction of rotation R101, which is opposite to a fourth direction of rotation R102. The said additional rotation axis X101 is most preferably parallel to the longi tudinal direction of the additional power transmission shaft 110.

In its position of use, the additional power transmission shaft 110 is, for example, essentially horizontal.

According to one example, the additional power transmission shaft 110 is parallel to the first power transmission shaft 10 and, simultaneously, the additional rotation axis X101 is parallel to the first rotation axis XI. In addition, according to one example, the third direction of rotation R101 is uniform with the first direction of rotation Rl.

Additionally, according to one example, the additional power transmission shaft 110 may be an extension to the first power transmission shaft 10 as in Figure 5 and, sim ultaneously, the additional rotation axis X101 joins with the first rotation axis XL

According to one example, the pedal cranks 12 and 16 shown above, their clutch elements 52 and synchronisation elements 20 are coupled to the additional power transmission shaft 110 so that their operation corresponds to what is presented above as they are connected to the first power transmission shaft 10. In this case, the third direction of rotation R101 equals the first direction of rotation Rl and the fourth di rection of rotation R102 equals the second direction of rotation R2.

According to one example, the pedal arrangement further has one or several bearing units 40, each of which comprises a bearing housing, via which the bearing unit is coupled to the additional power transmission shaft 110, and also a support element, with which the additional power transmission shaft 110 is attachable to a desired ob ject; for example, the vehicle frame, for example to its structures above the legroom in the frame.

According to one example, the additional power transmission shaft 110 is coupled to the first power transmission shaft 10 so that as the additional power transmission shaft 110 is in rotary movement (direction of rotation R102), also the first power transmis sion shaft 10 is forced into rotary movement (direction of rotation R2). This concerns for example, only the directions of rotation Rl and R102, but not the directions of rotation R2 and R102.

According to an example in Figure 4, the additional power transmission shaft 110 is coupled to the first power transmission shaft 10 with such an additional clutch ar rangement 152 which, first of all, forces the first power transmission shaft 10 to rotate in the first direction of rotation R1 at the same time as the additional power transmis sion shaft 110 rotates in the third direction of rotation R101. In addition to this, the said additional clutch arrangement 152 allows the rotation of the first power trans mission shaft 10 to continue in the first direction of rotation R1 at the same time as the additional power transmission shaft 110 is immobile or moves in the fourth direc tion of rotation R102.

According to an example in Figure 4, the additional clutch arrangement 152 is cou pled both to an end of the first power transmission shaft 10 and to an end of the additional rotation axis X101, the purpose of this being, as presented above, to trans mit the rotary movement selectively from the additional rotation axis X101 to the first power transmission shaft 10.

According to an example, the additional clutch arrangement 152 mentioned above comprises a freewheel clutch, which rotates freely in one direction of rotation, most preferably in the second/fourth direction of rotation R2/R102. To transmit the rotary movement from the additional rotation axis X101 to the first power transmission shaft 10, the additional clutch arrangement 152 locks when rotating in the opposite direc tion of rotation, i.e. in the first/third direction of rotation R1/R101.

According to an example in Figure 5, the pedal arrangement 64 further comprises a first sensor device 122, which is adapted to detect, whether the third pedal crank 44 and/or the fourth pedal crank 48 is in such movement, which forces the first power transmission shaft 10 into rotary movement; for example, into rotary movement in the first direction of rotation Rl. According to one example, the sensor device 122 generates an electric measuring signal, on the basis of which it can be concluded whether the pedal crank 44, 48 in question is in the said movement. According to one example, on the basis of the said electric measuring signal also the velocity of the movement in question can be concluded.

The first sensor device 122 may be applied in the manner presented above also in the alternative for the pedal arrangement 64, which does not utilise the additional power transmission shaft 110.

The first sensor device 122 may be by the first power transmission shaft 10 or coupled to it.

Alternatively, especially in the alternative utilising the additional power transmission shaft 110, the first sensor device 122 is, instead of the first power transmission shaft 10, connected to the third pedal crank 44 and/or to the fourth pedal crank 48, or to some other part of the pedal arrangement 64, which is moving simultaneously with the said pedal crank 44, 48 and by means of which it can be concluded whether the said pedal crank is moving (causing the rotary movement of the first power transmis sion shaft 10 in the direction of rotation Rl). The part in question is, for example, the synchronisation elements 20 belonging to the said pedal cranks or the clutch arrange ment 52 of the said pedal crank.

According to another example, the pedal arrangement 64 comprises a second sensor device 124, which is adapted to detect whether the first pedal crank 12 and/or the second pedal crank 16 is in such movement, which forces the additional power trans mission shaft 110 into rotary movement; for examples, into rotary movement in the third direction of rotation R101. In this example, the pedal cranks 12, 16 are coupled to the additional power transmission shaft 110 in the way presented above. In this example, the additional power transmission shaft 110 is coupled to the first power transmission shaft 10 so that the rotary movement (direction of rotation R101) of the additional power transmission shaft 110 forces the first power transmission shaft 10 into rotary movement (direction of rotation Rl).

When the additional power transmission shaft 110 is not in use, the second sensor device 124 is adapted to detect whether the first pedal crank 12 and/or the second pedal crank 16 is in such movement, which forces the first power transmission shaft 10 into rotary movement; for example, into rotary movement in the first direction of rotation Rl.

According to an example, the second sensor device 124 generates an electric meas uring signal, on the basis of which it can be concluded, whether the pedal crank 12, 16 in question is moving. According to one example, on the basis of the said electric measuring signal also the velocity of the movement in question can be concluded.

In accordance with Figure 5, the second sensor device 124 may be by the additional power transmission shaft 110 or coupled to it.

Alternatively, especially in the alternative without the additional power transmission shaft 110, the second sensor device 124 is, instead of the first power transmission shaft 10 and the additional power transmission shaft 110, coupled to the first pedal crank 12 and/or to the second pedal crank 16, or to some other such part of the pedal arrangement 64, which is moving simultaneously with the said pedal crank 12, 16 and by means of which it can be concluded, whether the said pedal crank is moving (causing the rotary movement of the first power transmission shaft 10 or the additional power transmission shaft 110 in the direction of rotation R1 or R101). The said part is, for example, the synchronisation elements 20 belonging to the said pedal cranks or the clutch arrangement 52 for the said pedal crank.

According to one example, the pedal arrangement 64 comprises a third sensor device 120, which is located in or coupled to the additional clutch arrangement 152 described above. The third sensor device 120 is adapted to detect the rotary movement of the additional power transmission shaft 110 in the third direction of rotation R101. Of this it can be concluded whether the pedal crank 12, 16 is in motion (forcing the rotary movement of the additional power transmission shaft 110 in the direction of rotation R101). According to one example, the third sensor device 124 generates an electric measuring signal, on the basis of which it can be concluded whether the pedal crank 12, 16 is moving. According to one example, also the velocity of the said movement can be concluded on the basis of the said electric measuring signal.

The sensor device 120, 122 and/or 124 may be connected with the electronic control unit 74 for the electric vehicle 62, which controls the operation of the electric vehicle 62 and/or the electric transmission system 78 on the basis of said one or several meas uring signals.

The sensor device 120, 122 and/or 124 may apply sensors and principles known per se and, at least partly, be based on mechanical, electric, magnetic, inductive or capac itive operation.

According to one example, the first sensor device 122 and/or the second sensor device 124 may be executed so that it is connected to the synchronisation elements 20. In this case, in accordance with the example in Figure 6, the said sensor device 122, 124 comprises a mechanism 114 moving along with the synchronisation elements 20 and a stationary sensor 112, which is adapted to detect the movement of the mechanism 114, generating an electric measuring signal, on the basis of which it can be concluded whether the mechanism 114 is moving; in other words, whether the respective first and second pedal cranks 12, 16 or the third and fourth pedal cranks 44, 48 are in such motion, which forces the respective first power transmission shaft 10 or the additional power transmission shaft 110 into rotary movement (direction of rotation R1/R101).

According to one example, the mechanism 114 comprises a cogging 116, which trav els past the sensor 112 as the mechanism 114 is moving. The sensor 112 detects the movement of the cogging 116 based, for example, on an inductive operation princi ple. The sensor 112 is attached, for example, to the vehicle frame. With the sensor devices described above, special benefits are achieved in the electric vehicle 62, which has at least two pairs of pedal cranks in a manner presented above. In this case, also the additional power transmission shaft 110 may be utilised, when needed. The generator 22 is then also coupled to the first power transmission shaft 10 via the mechanical transmission device 24.

In the said electric vehicle 62, one pair of pedal cranks (i.e. the pedal cranks 44, 48) are coupled to the first power transmission shaft 10; for example, for a passenger pedalling next to a driver. In this specification, driver refers to such a pedalling per son, who takes care of the control of the direction of travel and functions in the elec tric vehicle 62, such as breaking, for example, by means of the controls 68. A second pair of pedal cranks (i.e. the pedal cranks 12, 16), for example, for the driver, is con nected to the first power transmission shaft 10 in accordance with the first alternative, when the additional power transmission shaft 110 is not in use, or in accordance with the second alternative, the said second pair of pedal cranks is coupled to the additional power transmission shaft 110.

Following one example, at least the second sensor device 124 is used in the said first alternative, which is connected as presented above (for example, to the pedal cranks 12, 16) instead of the first power transmission shaft 10. In addition, also the first sensor device 122 may be used, which is coupled as presented above (for example, to the pedal cranks 44, 48) instead of the power transmission shaft 10.

Following one example, at least the second sensor device 124 is used in the above- mentioned second alternative, which is either connected to the additional power trans mission shaft 110 or, instead of the additional power transmission shaft 110, the sec ond sensor device 124 is coupled as has been presented above (for example, to the pedal cranks 12, 16). In addition to this, also the first sensor device 122 may be used, which is connected as has been presented above (for example, to the pedal cranks 44, 48) instead of the power transmission shaft 10.

Following one example, at least the third sensor device 120 is used in the above- mentioned second alternative. In addition to this, also the second sensor device 122 may be used, which is connected as has been presented above (for example, to the pedal cranks 44, 48) instead of the power transmission shaft 10.

In the alternatives presented above, based on the measuring signals generated by the sensor devices, for example, the measuring signals generated by the sensor devices 120 and 124, it is now possible, based on a predetermined algorithm, to conclude in the electronic control unit 74 at each moment, whether the driver is pedalling or not. In addition to this, based on the measuring signals generated by the sensor devices, for example, the measuring signal generated by the sensor device 122, it can also be concluded in the electronic control unit 74 at each moment, whether the passenger is pedalling or not.

On the basis of said deduction, it is now possible to control the operation of the elec tric vehicle 62 and/or the electric transmission system 78 by means of the electric control unit 74, based on the operation of the driver (when the driver uses the controls 68, pedals, or does not pedal) irrespective of the operation of the passenger (i.e. the passenger pedals, or does not pedal).

What has been presented above is of advantage, for example, in a situation in which the electric vehicle 62 is held momentarily stopped by the driver (for example so that the driver is not pedalling) and irrespective of whether the passenger is pedalling or not.

What has been presented above is also of advantage, for example, in a situation in which, for example after a stop or after having been stationary, the electric vehicle 62 is set in motion or it is kept in motion by the driver (for example so that the driver is pedalling) and irrespective of whether the passenger is pedalling or not.

When the electric vehicle stays still or is stationary also when the passenger is pedal ling, the storage battery 72 may be recharged while being stationary. According to another example, the passenger may start pedalling while the electric vehicle 62 is not moving or it has been stopped, but the benefit here is that by means of the pre sented solution the passenger’s pedalling is not interpreted as a command for the electric vehicle 62 to start moving. Only after the driver starts pedalling, this is a command for the electric vehicle 62 to move.

Thus, the benefits to be achieved increase the safe use of the electric vehicle 62 and it operates in an unsurprising way, for example, in the driver’s control.

The examples presented above are not limited only to alternatives, in which there are one or two pedal crank pairs, but also to the examples, in which the pedal arrangement or the electric vehicle comprises three or several pedal crank pairs.

The presented solution is not limited to the examples, the alternatives or the embodi ments presented above, more of which can be formed by combining the examples, the alternatives or the embodiments presented above. The presented solution is specified more closely in accordance with the enclosed claims.