FIELD OF THE INVENTION:

The present invention relates to automatic stabilization two or more inter connected parallel shaft gears. More specifically the present invention is directed to develop self stabilizing parallel shaft gears containing traditional gear teeth as well as permanent magnet having ability to stabilize itself automatically at only predefined specific points and provide a controlled movement in mechanical devices.

BACKGROUND OF THE INVENTION :

In parallel shift based transmission, motion or primary torque from one shaft is transferred to another shaft via gear teeth. Conventional parallel shift transmission gears include constant velocity ratio and can handle heavy load but these are not capable of stable automatically only at predefined points.

In other side, magnetic gears which are generally used in modern electric motors have a tendency to stable automatically only at predefined points but it cannot handle heavy load so mechanical slip may occur so these are also incapable to be stable automatically only at predefined points during higher power transmission.

It is thus there has been a need for developing a new parallel shift transmission gear arrangement which will be able to handle heavy load and automatically stabilize only at predefined points.

OBJECT OF THE INVENTION:

It is thus the basic object of the present invention is to develop a parallel shift transmission gear arrangement which would be adapted to stabilize itself automatically at only predefined specific points and provide a controlled movement in mechanical devices.

Another object of the present invention is to develop a parallel shift transmission gear arrangement which would involve traditional gear teeth as well as permanent magnet and transmit externally applied primary torque from one shaft to another by using the teeth of the gears automatically stabilized by using a torque mentioned as 'secondary torque' generates due to non-uniform distribution of magnetic force of attraction at pitch surface after removal of the externally applied primary torque. Yet another object of the present invention is to develop a parallel shift transmission gear arrangement which wou ld be adapted to increase accuracy of any rotation based machi ne or device such as Production line, rotating bridge.

Another object of the present invention is to develop a self stabilizing parallel shaft gear arrangement which wou ld be adapted to create mechanically operated self stabilizi ng rotatable object that can be allowed to rotate freely upon appl ication of externally applied torque and stabilize at any specific points after removal of the externally applied torque .

SUM MARY OF THE INVENTION :

Thus accord i ng to basic aspect of the present i nvention there is provided a secondary torque generator based self stabilizi ng parallel shaft gear arrangement comprisi ng two or more inter connected gears in parallel shafts adapted to transmit externally applied pri mary torque from one shaft to another through cooperative gear teeth ; secondary torque generator comprising selectively disposed mag nets placed i n the respective gear cores a nd behind the gear teeth providing plurality of spaced apart stable points and u nstable points based on the disposition of magnet and its mag netic field of attraction in stable points and total absence or va riable magnetic field of attraction field in said unstanble poi nts such that when the primary torque get reduced or removed , said disposition of the magnets in the cooperating gears generate seconda ry torque i nvolving a combination of said stable and unstable pitch points with stable points being mating points of the gears with coming together of co acti ng attracti ng adjacent opposite poles of the disposed mag nets of respective gears and said unstable points being mating points of the gears with comi ng together of co acting repelling or va riably controlled and reduced attracting poles of mag nets of respective gears whereby providing for non-uniform distribution of magnetic force along the pitch surface of the gea rs such as to stabi lize the gears at any specified pitch points by involving said secondary torque when the primary torque get reduced or removed . According to another aspect in the ^' present secondary torque generator based self stabilizing parallel shaft gear arrangement, the stable points and unstable points can be selectively provided in the gears based on the selective disposition of the magnets and the nature of secondary torque required to be generated in cooperation with the primary torque ending .

According to another aspect in the present secondary torque generator based self stabilizing parallel shaft gear arrangement, spacing of the magnets constituting the stable points also create in-between unstable points for cooperative generation of the secondary torque based on the stable pitch point and unstable pitch point.

According to a further aspect in the present secondary torque generator based self stabilizing parallel shaft gear arrangement, the stable points are selectively disposed for stopping the secondary torque movement while unstable points are selectively disposed for carrying forward a secondary motion.

According to yet another aspect in the present secondary torque generator based self stabilizing parallel shaft gear arrangement, for generation of smaller secondary torque the stable pitch points are closer while for generation of larger secondary torque the stable pitch points are spaced .

According to a further aspect in the present secondary torque generator based self stabilizing parallel shaft gear arrangement, the magnets disposition covers the entire core of the gears with selective disposition of adjacent magnets with different attracting poles facing one another.

According to yet another aspect in the present secondary torque generator based self stabilizing parallel shaft gear arrangement, the magnets installed in the shaft gear creates stable points corresponding to maximum magnetic force of attraction and unstable points corresponding to minimum magnetic force attraction (which may be negative attraction i .e. positive deflection) on the pitch circle of the gears. According to another aspect in the present secondary torque generator based self stabilizing parallel shaft gear arrangement, the magnets are selectively installed on both shafts of the parallel shaft gear with two connected gears to ensure during rotation coinciding of all the stable points of the one gear with all the stable point of the another connected gear to create stable pitch points and coinciding of all the unstable points of the one gear with all the unstable points of the another connected gear to create unstable pitch points.

According to a further aspect, the present secondary torque generator based self stabilizing parallel shaft gear arrangement comprises variable stable points with increased or decreased , number of magnets and variable distribution of stable point or unstable point on the pitch circle or pitch line the gear depending upon the distribution of the magnets.

According to a further aspect in the present secondary torque generator based self stabilizing parallel shaft gear arrangement, fractional pieces of magnets of opposite poles on a same plane parallel to each other and joined together side by side likewise a wedge shaped cake like structure cut through central angle for round gear and parallel to the shaft axis to comprise the core of gear body having multiple poles on each face having stable points and the unstable points on the gear; wherein the unstable points corresponding to the lowest magnetic force of attraction are located at joining portion of the magnets of different poles and where said joining lines touch through belt at pitch circle or pitch line for rack gear; and wherein the stable points corresponding to the highest magnetic force of attraction are located at points on the pitch circle or pitch line for rack gear for each magnets with highest magnetic force of attraction. According to another aspect in the present secondary torque generator based self stabilizing parallel shaft gear arrangement, the outer surface portion of the core is attached with a rim like structure or a casing to hold magnet whose flank portion or meshing surface includes successively engaging teeth to prevent slip of the gears during rotation. According to yet another aspect in the present secondary torque generator based self stabilizing parallel shaft gear arrangement, the stable points and the unstable points on the gear are developed by attaching smaller magnets fitted below of gear meshing surface vertical to the shaft axis and behind of the successively engaging gear teeth; wherein, the stable points corresponding to the highest magnetic force of attraction are located at points on the pitch circle or pitch line for rack gear nearest to each magnet; and wherein, unstable points corresponding to the lowest magnetic force of attraction are located at points on the pitch circle or pitch line for rack gear where the magnetic force of attraction is lowest.

According to another aspect in the present secondary torque generator based self stabilizing parallel shaft gear arrangement, the secondary torque generates due to non-uniform distribution of magnetic force of attraction at the pitch surface with direction from the stable point to the nearest unstable point between which pitch point lies and the direction of secondary torque gets- opposite from each stable pitch point as well as each unstable pitch point.

According to yet another aspect in the present secondary torque generator based self stabilizing parallel shaft gear arrangement, magnitude of the secondary torque is zero on each stable pitch point as well as on each unstable pitch point and during shaft rotation, said secondary torque gets removed as stable point of a gear reaches the pitch circle of another gear causing the gears to automatically stabilize at the stable pitch points rather than other pitch points when the primary torque get reduced or removed .

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:

Figure 1.1 and 1.2 shows preferred embodiment two inter connected gear arrangement with stable and unstable points in accordance with the present invention.

Figure 2.1 and 2.2 shows another preferred embodiment two inter connected gear arrangement with stable and unstable points in accordance with the present invention. Figure 3.1 and 3.2 shows automatic stabilization of inter connected gear arrangement at predefined specific points by involving secondary torque in accordance with the present invention.

Figure 4.1 and 4.2 shows generation of the stable' and unstable points in accordance with the distribution of the magnets in the gear arrangement according to an embodiment of the present invention.

Figure 5.1 and 5.2 shows construction of the magnets installed in the gear arrangement according to an embodiment of the present invention.

Figure 6 shows another preferred embodiment two inter connected gear arrangement with stable and unstable points in accordance with the present invention having repulsion force in the unstable points.

DETAILED DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS:

As stated herein before, the present invention discloses a self stabilizing parallel shaft transmission arrangement containing traditional gear teeth as well as permanent magnet. In the present self stabilizing parallel shaft gear arrangement, two or more inter connected gears which are retained in the parallel shafts to transmit externally applied primary torque from one shaft to another by using the teeth of the gears automatically stabilized by using a torque mentioned as 'secondary torque' generates due to non-uniform distribution of magnetic force of attraction at pitch surface after removal of the externally applied primary torque.

The said non-uniform distribution of magnetic force of attraction at pitch surface for generating the secondary torque is created by selectively disposing the magnets in the respective gear cores and behind the gear teeth to provide plurality of spaced apart stable points and unstable points based on the disposition of the magnet. The stable points corresponds position in the gear where magnetic force of attraction is maximum and unstable points corresponds position in the gear where magnetic force attraction is minimum (which may be negative attraction i.e. positive deflection) . The magnetic field in the stable points and absence of magnets and/or absence of magnetic attraction field in the unstanble points due to the disposition of the magnets in the cooperating gears generate the secondary torque when the primary torque get reduced or removed. The generation of the secondary torque involves a combination of stable and unstable pitch points wherein the stable pitch points includes mating points of the gears with coming together of co acting attracting adjacent opposite poles of the disposed magnets of respective gears and the unstable pitch points includes mating points of the gears with coming together of co acting repelling adjacent poles of magnets of respective gears.

In an embodiment of the present invention, wherein magnet/magnets are present in both shafts of a combination of parallel shaft gear arrangement with two connected gears, the magnets are installed on the shaft gears in such a way that during rotation all the stable points of the one gear will always coincide with all the stable points of the another connected gear (i.e. the creation of stable pitch points) and all the unstable points of the a gear will always coincide with all the unstable points of the another connected gear (creation of unstable pitch points). The situation has shown in the accompanying figures 1.1 , 2.1 and 3.1. In an embodiment of the present invention, wherein magnet/magnets are present in a single shaft of a combination of parallel shaft gear arrangement with two connected gears, the magnets are installed on the shaft gear in such a way that during rotation all the stable points of one gear in which magnet/magnets are present, will coincide with the pitch circle of another gear in which magnetic material is present (creation of stable pitch point) and all the unstable point of one gear in which magnet/magnets are present, will coincide with the pitch circle of another gear in which magnetic material is present (creation of unstable pitch point), shown in the figures 1.2, 2.2 and 1.2.

The spacing of the magnets constituting the stable points may create in-between unstable points for cooperative generation of the secondary torque based on the stable pitch point and unstable pitch point. The stable points are selectively disposed for stopping the secondary torque movement while unstable points are selectively disposed for carrying forward a secondary motion. In a preferred embodiment, for generation of smaller secondary torque the stable pitch points are closer while for generation of larger secondary torque the stable pitch points are spaced.

The number of stable points can be increased or decreased by increasing or decreasing the number of magnets. The distribution of stable point or unstable point on the pitch circle i.e. pitch line for rack gear is depends upon the distribution of the magnets. So, the distribution can be non-uniform also as shown in the figures 4.1 and 4.2.

There are many ways to develop stable points and unstable points on a gear using magnet or magnetic combination. For example two ideal construction processes are shown bellow.

PROCESS 1 :

Here fractional pieces of magnets of opposite poles lie on a same plane parallel to each other are joined together side by side (wedge shaped cake like structure (round or cylindrical shape) cut through central angle for round gear) parallel to the shaft axis to comprise the core of gear body having multiple poles on each face according to the diagrams (fig .5.1 ; (a) shows round gear core and (b) shows rack gear core) . Outer surface portion of the core is attached with a rim like structure or a casing to hold magnet whose flank portion(meshing surface) have successively engaging teeth to prevent slip. Here, magnetic force of attraction is lowest at the joining portion of magnets of different poles and where these joining lines touch through the belt at pitch circle (or pitch line for rack gear) are considered as unstable points. The points on the pitch circle (or pitch line for rack gear) for each magnet where the magnetic force of attraction is most, are considered as stable points as shown in the accompanying figures 1.1, 1.2 and 4.1.

PROCESS 2:

Here smaller magnets (shown in figure 5.2) are fitted below the meshing surface (i.e. the inner periphery) vertical to the shaft axis behind the successively, engaging teeth according to the diagrams (figure 2.1 and 2.2). The point on the pitch circle (or pitch line for rack gear) nearest to each magnet where the magnetic force of attraction is most are considered as stable points. The points on the pitch circle (or pitch line for rack gear) where the magnetic force of attraction is lowest are considered as unstable points, shown in the figure 2.1, 2.2 and 4.2. In this gearing mechanism gears use their teeth to transmit motion or primary torque from one shaft to another which is applied externally. Secondary torque generates due to nonuniform distribution of magnetic force of attraction at the pitch surface. Here the direction of secondary torque is from stable point to nearest unstable point between which pitch point lies as shown in the fig.3.1 and fig.3.2. The direction of secondary torque gets opposite from each stable pitch point as well as each unstable pitch point. The magnitude of secondary torque is zero on each stable pitch point as well as each unstable pitch point. So, during shaft rotation, secondary torque gets removed as stable point of a gear reaches the pitch circle of another gear. As a result gears get a tendency to get stable at the. ^' stable pitch point rather than other pitch points due to secondary torque when the primary torque get reduced or removed .

The present self stabilizing parallel shaft gear arrangement which has the ability to stabilize itself automatically at only predefined specific stable points is particularly useful to increase the accuracy of any rotation based machine or device such as Production line, rotating bridge. The present self stabilizing parallel shaft gear arrangement can be used to create mechanically operated self stabilizing rotatable object that can be allowed to rotate freely upon application of externally applied torque and stabilize at any specific points after removal of the externally applied torque.

The present self stabilizing parallel shaft gear arrangement can also be used in precision swing door, drawer etc. that tends to stable for some particular, pre defined positions only. E.g . A modern swing door having spring in hinge can stable the door in maximum two positions (generally fully shut and fully open position) where tension in spring provides the required stabilizing force i .e. secondary torque. But if the present Self Stabilizing Parallel Shaft Gear arrangement is used in the swing the door hinge then the door can be stabled in any predefined positions where magnetic force of attraction become maximum between two magnets attached in two different gears. Here magnetic force provides the required stabilizing force through the secondary torque.

While the present invention may have been described through reference to specific embodiments, the invention is not limited to these specific embodiments. Other changes and modifications known to those of ordinary skill are intended to be included within the scope of the present invention.