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Title:
KINEMATISM WITH ORBITAL MOVEMENT WITH FIXED ORIENTATION
Document Type and Number:
WIPO Patent Application WO/2013/153564
Kind Code:
A1
Abstract:
A kinematism is described, with orbital movement (1) with fixed orientation comprising at least one first (2) and one second (3) motion transmitting means, 'respectively connected to a thrust system (4, 12) and to a driven system (24, 26), mutually facing and mutually frontally cooperating through respective first and second mechanically cooperating means, at least the first transmitting means (2) being rotating around a main rotation axis (R-R), the first mechanically cooperating means being adapted to apply a series of points of force to the second mechanically cooperating means in such a way that a set of positions, instant by instant occupied in the space by each one of the points of force, individually considered, substantially describes a Lemniscate curve as Mobius ring, the thrust system (4, 12) being slanted with respect to the main rotation axis (R-R) and symmetrical with and coaxial to a slanted axis (R' -R' ) around which the curve of the points of force are symmetrically distributed, the kinematism (1) further comprising rotation-preventing means (5, 5' ) adapted to prevent a rotation of a single point of force with respect to the main rotation axis (R-R); the rotation- preventing means (5, 5' ) are composed of at least one rotation-preventing ring (5, 5') constrained to the thrust system (4, 12) through a first pin (6, 6') and a second pin (7, 7 ' ) that are diametrically opposite, the rotation-preventing ring (5, 5') being further constrained to a fixed reference support or carter (8, 14) of the kinematism (1) through a third pin (9, 9') and a fourth pin (10, 10') that are diametrically opposite and arranged orthogonal with respect to the axis of the first pin (6, 6') and the second pin (7, 7').

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Inventors:
CONTARDO LIVIO (IT)
Application Number:
PCT/IT2012/000109
Publication Date:
October 17, 2013
Filing Date:
April 13, 2012
Export Citation:
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Assignee:
ORBITECH ENGINEERING S R L (IT)
CONTARDO LIVIO (IT)
International Classes:
F16H1/32
Domestic Patent References:
WO2005124191A12005-12-29
WO2011154981A12011-12-15
WO2011154981A12011-12-15
Foreign References:
GB2011016A1979-07-04
DE188265C
Attorney, Agent or Firm:
GARAVELLI Paolo (Via Servais 27, Torino, IT)
Download PDF:
Claims:
CLAIMS

1. Kinematism with orbital movement (1) with fixed orientation comprising at least one first (2) and one second (3) motion transmitting means, respectively connected to a thrust system (4, 12) and to a driven system (24, 26), mutually facing and mutually frontally cooperating through respective first and second mechanically cooperating means, at least said first transmitting means (2) being rotating around a main rotation, axis (R-R) , said first mechanically cooperating means being, adapted to apply a series of points of force to said second mechanically cooperating means in such a way that a set of positions, instant by instant occupied in the space by each one of said points of force, individually considered, substantially describes a Lemniscate curve as Mobius ring, said thrust system (4, 12) being slanted with respect to said main rotation axis (R-R) and symmetrical with and coaxial to a slanted axis (R'-R') around which said curve of said points of force are symmetrically distributed, said kinematism (1) further comprising rotation-preventing means (5, 5') adapted to prevent a rotation of a single point of force with respect to said main rotation axis (R-R) , characterised in that said rotation-preventing means (5, 5' ) are composed of at least one rotation-preventing ring (5, 5' ) constrained to the thrust system (4, 12) through a first pin (6, 6') and a second pin (7, 7') that are diametrically opposite, said rotation-preventing ring (5, 5' ) being further constrained to a fixed reference support or carter (8, 14) of the kinematism (1) through a third pin (9, 9') and a fourth pin (10, 10') that are diametrically opposite and arranged orthogonal with respect to the axis of the first pin (6, 6') and the second pin (7, 7').

2. Kinematism with orbital movement (1) according to claim 1,. characterised in that said first (2) and said second (3) motion transmitting means are respectively a motion entry shaft and a motion output shaft in/from said kinematism with orbital movement (1).

3. Kinematism with orbital movement (1) according to claim 1 or 2, characterised in that said thrust system (4, 12) is composed of at least one barrel-carrier crown (4) that supports a plurality of barrels (20) adapted to engage corresponding grooves (22) of the driven system (24, 26) composed of a disk (24) keyed onto the output shaft (3) . '

4. Kinematism with orbital movement (1) according to claim 1 or 2, characterised in that said thrust system (4, 12) is composed of at least one crown (12) adapted to push through connecting rods a driven system (26) composed of a plurality of pistons (11), said crown (12) being keyed slanted onto the entry shaft (2).

5. Kinematism with orbital movement (1) according to claim 1, 2 or 3, characterised in that it is adapted to be used in a revolution reducer or multiplier system in a mechanical transmission.

6. Kinematism with orbital movement (1) according to claim 1, 2 or 4, characterised in that it is adapted to be used in a compressor system, in particular used in an hydrocarbon-type or compressed-air-type engine.

7. Kinematism with orbital movement (1). according to claim 1 or 2, characterised in that it is adapted to be used in an explosion engine.

Description:
KINEMATIS WITH ORBITAL MOVEMENT WITH FIXED ORIENTATION

The present invention refers to a kinematism with orbital movement with fixed orientation, that can be used in particular for making a revolution variator, reducer or multiplier in a mechanical transmission, or for making an explosion engine.

In the field of transmissions with continuous revolution variation of a mechanical type, the only known systems are based on friction (variable pulleys and trapezoidal belts like the Variomatic gearbox marketed by Company DAF, or the motion transmitting system with continuous revolution variation in Fischer turns, that used alternate current motors, therefore with a constant number of revolutions) , with a limitation, for obvious known reasons, on values of transmitted torque.

In the field of torque and revolution variators of the oil-dynamic type, there are gearboxes equipped with torque converter, that however similarly have step-type transmission ratios and absorb a not neglected part of power that is dissipated in internal frictions due to blows-by of viscous liquid in the interface areas of the impellers .

In the field of reducers, the prior art instead provides various solutions, that range from worm screws to the cascade of gears, till bevel torques, always anyway based on gear-type transmissions and consequently always constrained to fixed ratios. It is therefore not possible to change the number of revolutions apart from a change of ratio.

Document WO-A-2011/154981 of the same Applicant of the present invention provides a kinematism with orbital movement with fixed orientation that can be adapted to situations providing in particular for the use of motors with constant number of revolutions or with a reduced variability range.

Therefore, object of the present invention is solving the above prior art problems and improving the solution obtained in document WO-A-2011/154981, by providing a kinematism with orbital movement with fixed orientation that can be adapted to situations providing in particular for the use of motors with constant number of revolutions or with a reduced variability range.

Another object of the present invention is providing a kinematism with orbital movement with fixed orientation that, differently from known automatic gearboxes, allows keeping constant the number of revolutions of the engine to which it is coupled, that, for this reason, can indifferently be, in addition to an explosion engine as normally known, an endothermic, electric, hydraulic, pneumatic or permanent magnet engine, of the type with constant rotation.

Moreover, an object of the present invention is providing a kinematism with orbital movement with fixed orientation that, differently from known devolution variators, allows transmitting even very high powers.

The above and other objects and advantages of the invention, as will appear from the following description, are obtained with a kinematism with orbital movement with fixed orientation as claimed in claim 1. Preferred embodiments and non-trivial variations of the present invention are the subject matter of the dependent claims.

It is intended that all claims form an integral part of the present document.

It will be immediately ^ obvious that numerous variations and modifications (for example related to shape, sizes, arrangements and , parts with equivalent functionality) can be made to what is described, without departing from the scope of the invention as appears from the enclosed claims.

The present invention will be better described by some preferred embodiments thereof, provided as a non- limiting example, with reference to the enclosed drawings in which:

Figure 1 shows a perspective view of a first operating position of a preferred embodiment of the kinematism according to the present invention used in a reducer system;

Figure 2 shows a perspective view of a second operating position of the kinematism of Figure 1;

Figure 3 shows a perspective view of a third operating position of the kinematism of Figure 1; and

Figure 4 shows a perspective view of an operating position of another preferred embodiment of the kinematism according to the present invention used in a compressor system.

With reference to the Figures, . it is possible to note that the kinematism 1 with orbital movement with fixed orientation according to the present invention comprises at least one first and one second motion transmitting means, respectively 2 and 3, preferably and respectively representing a motion entry shaft and a motion output shaft in/from the kinematism with orbital movement 1, respectively connected to a thrust system 4, 12 and to a driven system 24, 26 that are mutually facing and mutually frontally cooperating (in a known way, for example, from document WO-A-2011/154981) through respectively first and second mechanically cooperating means, at least such first transmitting means 2 being rotating around a main rotation axis R-R.

Advantageously, the first mechanically cooperating means are adapted to apply a series of points of force on the second mechanically cooperating means in such a way that the set of positions occupied instant by instant in the space by such singularly considered point of force describe a closed or open curve, having a behaviour that can substantially be assimilated to a Lemniscate curve; moreover, the thrust system 4, 12 and, consequently, the first mechanically cooperating means, is slanted with respect to such main rotation axis R-R and is symmetrical and coaxial with a slanted axis R' -R' around which the curves of the points of force are symmetrically distributed.

The point of force is a point arranged on the second mechanically cooperating means in which, instant by instant, the force vector is applied, where the term force vector means a vector characterised by:

- MODULE (measured in Newton) ;

- VERSE (positive if in agreement with the movement, thrust, negative if in disagreement, braking)

- DIRECTION (measured in the three angular components with reference to Cartesian axes X, Y, Z) . Moreover, the kinematism 1 according to the present invention comprises rotation-preventing means 5 adapted to prevent the rotation of the single point of force with respect to the main rotation axis R-R and to compel the above point to move in space along the previously defined curve of the point of force. Such geometry therefore performs a coupling that combines an orbital movement of the support system 4, 12 with respect to the slanted axis R'-R' conferring a movement in space, and a traditional rotary movement around the main rotation axis R-R that confers a movement in a plane; such two above-described movements are then transmitted to the driven system 24, 26, through the second mechanically cooperating means supported by the second transmission shaft 3 that is rotated around such main rotation axis . R-R.

In general, therefore, the operating principle of the kinematism 1 according to the present invention can be described as follows; considering a transfer of forces between the motion entry shaft 2 and the motion output shaft 3, it is possible to obtain a reduction or multiplication (with the same verse or a contrary verse) of the entry torque with respect to the output torque, and a related revolution variation, by placing suitable rotation-preventing constraints through the rotation- preventing means 8 to the points of force symmetrically arranged with respect to the slanted axis R' -R' intersecting the main rotation axis R-R. Such points of force will then be compelled to orbit in space keeping a fixed orientation. The curve of the point of force described by such orbiting can be assimilated to a Lemniscate curve with behaviour as a Mobius ring through which the entry torque is transmitted to the driven system 24, 26 by applying the points of force on the second mechanically cooperating means by the first mechanically cooperating means of the thrust system 4, 12.

With this arrangement known from document WO-A- 2011/154981, the present invention is shown in the Figures absolutely in a non-limiting way, in order to show the application of the kinematism 1 respectively to a reducer system (Figures 1 to 3) and to a compressor system (Figure 4): the arrangement on an explosion engine is possible, but it is not shown.

According to Figures 1 to 3, that show three operating positions thereof, a first preferred embodiment of the kinematism 1 according to the present invention has the function of a revolution reducer, namely the case in which the following conditions occur:

- output torque > entry torque with respect to the main rotation axis R-R; - number of revolutions as output from the second transmission shaft 3 < number of revolutions as entry in the first rotation shaft 2.

In such preferred embodiment of the kinematism 1 according to the present invention, the definition of "rotation-preventing constraints" covers all fulcrums, hinges, connections, mechanical or not, that prevent the rotation of the slanted axis R' -R' with respect to the main axis R-R and compel it to oscillate around the intersection point between Slanted axis and Main axis.

In the reducer system shown in Figures 1 to 3, the torque can be transferred from the entry shaft 2 to the output shaft 3 through an orbital movement of the barrel- carrier crown 4 (that supports a plurality of barrels 20 adapted to engage corresponding grooves 22 of the driven system 24 composed of a disk keyed onto the output shaft 3) that is keyed slanted on the entry shaft 2 through bearings/bushings (not shown) and is constrained . to the rotation-preventing means 5 that, in an innovative way, are composed of a rotation-preventing ring 5, such constrain being obtained through a first pin 6 and a second pin 7 that are diametrically opposite.

The rotation-preventing ring 5 is constrained to a fixed reference support 8 of the kinematism 1 through a third pin 9 and a fourth pin 10 that are diametrically opposite and arranged orthogonal with respect to the axis of the first and the second pin 6 and 7.

Both the first and the second pin 6 and 7, and the third and the fourth pin 9 and 10, are coupled with a slack and allow a rotation around their own axis and a translation along the same axis.

The above first preferred embodiment of the kinematism 1 according to the present invention can obviously have the function of speed multiplier, namely the case in which the following conditions occur:

- output torque < entry torque with respect to the main rotation axis R-R;

- number of revolutions as output from the second transmission shaft 3 > number of revolutions as entry in the first motion transmitting means 2.

Obviously, the continuous kinematism 1 can be subjected to further modifications or variations as well as further applications not explicitly described, - wholly within the grasp of an average technician in the field, though remaining within the same inventive principle: for example, the combination of a reducer kinematism 1 with a multiplier kinematism 1, as previously described, allows making a complex kinematism 1 operating as variator.

Or, as can be noted in Figure 4, if the orbital kinematism 1 with fixed orientation according to the present invention is exploited to perform a work instead of increasing a torque, it can for example be used for generating a compressed fluid in a compressor system, in particular used in a hydrocarbon-type or compressed-air- type engine.

In such system, the torque of the entry shaft 2 can be transformed into a linear movement of the pistons 11 through the orbital movement of the crown 12 to which the connecting rods (not shown) are connected. The crown 12 is keyed slanted onto the entry shaft 2 through bearings/bushings (not shown) .

This crown 12 is constrained to a rotation- preventing ring 5' through a first pin 6' and a second pin 7' that are diametrically opposite. The rotation- preventing ring 5' is constrained to a fixed external carter 14 through a third pin 9' and a fourth pin 10' that are diametrically opposite and forming an orthogonal axis with respect to the axis of the first and the second pin 6' and 7' .

Both the first and the second pin 6' and 7', and the third and the fourth pin 9' and 10', are coupled with a slack and allow a rotation around their own axis and a translation along the same axis