Device for control of stepless transmission

FIELD: machine building.

SUBSTANCE: device consists of control part actuated by user for control of ratio (lever (50) and of device of working connection (rollers (18) of control part for regulation of ratio with movable part for transfer of variator torque. The connecting device corresponds to a hydro-mechanical arrangement. When a user actuates control part (50) for regulation of ratio there is regulated ratio of variator. The device also has the appliance for turning torque off (valve (60) actuated by a user for disconnection of the part for regulation of the ratio from the movable part for transfer of torque.

EFFECT: simplification of design.

17 cl, 3 dwg

 

The present invention relates to the control of continuously variable transmission.

Normal transmission car with manual speed gearbox, in a typical case, is driven by user-clutch between engine and gearbox, which serves for coupling/uncoupling. When the vehicle moves off, that is when it starts to move from a state of rest, there is an inevitable initial mismatch of speeds between the input transmission and the output of the engine, and allowing the slippage of the clutch at this stage, the driver invokes the application of torque to the transmission for acceleration of the vehicle without applying unacceptable load to the engine, which could cause him to stop. In the case of conventional automatic speed transmission of the initial mismatch of speeds will be settled by the torque Converter. The clutch and the torque Converter are examples of what will be called here a "starter device.

In some continuously variable transmissions starting device is not required. Instead, such a continuously variable transmission capable of providing infinite speed decrease. That is, by adjusting the gear ratio and without physically disconnected the I engine from the output of the transmission they can achieve status, in which the output of the transmission is stationary, while the engine is running.

This condition is referred to as "linked neutral state". The start can be achieved simply by shifting the gear ratio of the stepless transmission from concatenated neutral state, and there is no need to disconnect the transmission from the engine to stop the vehicle.

However, the inventors found that it would be preferable if such transmission could be made so that it imitated in some respects the functionality of a manual transmission having a driven user grip. Using the clutch is very familiar to many drivers. It gives a stable guarantee that the torque slippage will not be attached to the wheels of the vehicle. It is also useful, for example, in some maneuvers at a low speed.

It should be noted that the word "engine" is used here for brevity to refer to any form of rotary drive and should be construed as covering not only internal combustion engines, but also motors, engines, external combustion, etc.

The word "variable" is used here to refer to a device that has a rotary input and rotary output and is AutoRAE transmits driving force from one to the other with gear ratio, which can vary continuously. Such a device can be found in any variable transmission. Most, if not all, of the variators have some movable part for transmitting torque, which is involved in the transmission of drive force, and the position which corresponds to the transmission ratio of the variator. In the famous case of the toroidal CVT with a raceway and a thrust rolling rollers are movable parts of the transmission torque. They transmit the driving force from one toroidal recessed raceway to another, and their movement causes a change in the tilt of the rollers, which is connected with the change of the drive transmission ratio of the variator. The force applied to the movable part for transmitting torque to influence its position and, thus, to influence the transmission ratio of the variator. In principle, this force could be transmitted through a direct connection with the management tool user, such as a lever or pedal. In practice, except in the case of very light vehicles, power required, which is associated with torques acting on the variator, is too large for comfortable use by the user. The achievement of linked neutral state with such a device which may be problematic, since any slight deviation of the provisions of part for transmitting torque from the position required for concatenated neutral state, will cause the transmission to take a very low drive ratio, potentially resulting in a large "torque slippage, although at low speeds of rotation of the wheel.

Modern variable transmission, in the typical case, based on sophisticated electronic controllers for controlling the motor and transmission. However, in the market there is a need for a simple physical devices for controlling continuously variable transmissions. It would have been particularly attractive for use, for example, in the basic models of tractors.

In accordance with the first object of the present invention, an apparatus control variator, and the device contains the managed user part for regulating the transmission ratio, means of connection in the working position side to regulate the gear ratio with a moving part for transmitting torque of the variator, which allows the user to control the gear ratio of the variator, and a means of disconnecting the torque actuated by the user to detach part for regulating the transmission ratio from under IGNOU part for transmitting torque.

Part for regulating the transmission ratio can be, for example, a pedal or lever, actuated by the user. Working connection part for regulating gear part to transmit torque preferably such that the position of the parts for the transmission torque is determined by the position of the part for regulating the transmission ratio.

In accordance with the second object of the present invention, an apparatus control variator, and the device comprises a driven user part for regulating the transmission ratio, means of connection in the working position side to regulate the gear ratio with a moving part for transmitting torque of the variator, which allows the user to control the gear ratio of the variator, and the means of application to part for regulating the transmission ratio of effort, which varies in accordance with the force experienced by a moving part for transmitting torque.

Specific embodiments of the present invention will now be described by example only, with reference to the accompanying drawings, on which:

figure 1 is a very simplified and schematic view of the variator, suitable for use in implementing the present invention;

IG - schematic view of the variable transmission suitable for use in implementing the present invention; and

figure 3 - schematic view of the control device, corresponding to a variant of implementation of the present invention.

Figure 1 shows a variator of a known type with a toroidal raceway with thrust bearings. The present invention was developed in connection with a continuously variable transmission using this type of variator, which is particularly well suited for this purpose, but, in principle, can be used with the variator of other types.

The variator 10 includes coaxially mounted input and output paths 12, 14 of the roller adjacent surfaces 6, 8 of which have polutoroetazhny excavation and together form a generally toroidal cavity 16 containing a movable part for transmitting torque in the form of a roller 18. In fact, the existing practice on the variator, in a typical case, has two or three such roller, spaced at intervals around the circumference of the cavity 16. Each roller 18 rolls on the surfaces 6, 8 of the respective tracks 12, 14 of the rolling elements and, thus, serves to transmit drive force from one another. The roller 18 is able to move back and forth in the circumferential direction around a common axis 20 of the track 12, 14 rolling. He is also capable of precessional. That is, the axis of the roller ways is to be rotated, correcting the deviation of the axis of the roller relative to the axis of the disk. In the example shown these movements is provided by installing a roller 18 rotatably in the carrier 22, which is connected by a rod 24 with the piston 26 of the actuator 28. Line 19 from the center of the piston 26 toward the center of the roller 18 is the axis of precession around which can rotate the entire node. The precession of the roller leads to changes of the radii of the trajectories traversed by the roller tracks 12, 14 rolling, and, consequently, to change the gear ratio of the drive variator.

It should be noted that in this example, the axis 19 of the precession does not lie exactly in the plane perpendicular to the common axis 20, but instead is inclined relative to this plane. The angle of deviation is indicated by the reference position of the SA in the drawing and is known as the "angle of semioriental movie. When the roller moves back and forth, he follows a circular trajectory centered on the common axis 20. In addition, the impact of the tracks 12, 14 rolling on the roller ruling creates a moment which tends to keep him from such a deviation to the roller axis crossed the common axis 20. This is the intersection of the axes can be maintained, despite moving the roller back and forth along its circular path, on the basis of the angle of semioriental roller. When the roller moves along its trajectory, he also directed the action of the balls, causing the th precession thus, to save the intersection of the axes. As a result, the position of the roller on its trajectory corresponds to a deviation of roller and, therefore, a specific drive transmission including a variator.

The actuator 28 takes the opposing pressure of the working fluid in the lines 30, 32. The force thus generated by the actuator 28 causes movement of the roller along its circular path around a common axis 20, and in equilibrium it is balanced by the forces exerted by the roller tracks 12, 14 rolling. The force exerted on the raceways, proportional to the sum of the torques exerted from the outside to the raceways of the variator. This amount represents the sum of the input torque of the variator and the output torque of the variator is effective torque, which should act on the fastening means of the variator and is referred to as the reactive torque.

In figure 2 the engine represented by block ENG, CVT circle V and planetary parallel transfer unit that is the input of the variator is connected to the engine gears R1, R2. Its output is connected to the first input shaft S1 of the planetary parallel transfer, that is, the Second input shaft S2 of the planetary parallel transmission E is connected through the transfer of R1, R3 with constant gear ratio with the engine. The output shaft S3 planetar the th parallel transmission E is connected through the transmission gear R4 with a point of use power, in this case, the wheels W of the vehicle. The action and design of the planetary transmission is well known. The speed of the output shaft S3 can be expressed as a function of the speed of the input shaft S1, S2. When a specific drive transmission including a variator speed of the shafts S1 and S2 cancel each other, and the output shaft speed S3 is zero regardless of the speed of the engine. It is a "linked neutral" condition mentioned above. Transmission gear ratio of the variator to one side in linked neutral state to the shaft S3 produce rotation in one direction, and the transmission gear ratio of the variator to the other side in linked neutral state to the shaft S3 produce rotation in the opposite direction.

Thus, by regulating the drive transmission ratio of the variator can go from forward motion coupled through neutral to reverse motion.

The control device corresponding to the present invention will now be described with reference to figure 3, where the control drive variator and the piston is again denoted by the reference position 28 and 26, respectively. The device serves to control hydraulic pressure supplied to the actuator, which, in turn, controls the gear ratio of the variator.

Pref is apparent in the action by the user part to regulate the gear ratio indicated by the reference position 50 in the figure. Part for regulating the transmission ratio in operating position connected to the variator rollers. The user moves this part to regulate the gear ratio adopted by the regulator and, therefore, the transmission as a whole. The gear ratio of the variator is a function of the position of the part for regulating the transmission ratio. Part for regulating the transmission ratio can be moved in a continuous range, indicated by arrows in the drawing, from the position of maximum transmission ratios for forward movement through a linked neutral position to the position of maximum gear ratio for reverse. The ranges of gear ratios forward and backward, in the typical case will be different, giving higher speeds forward than back. Part for regulating the transmission ratio in this embodiment, the structure formed by the manual lever. Alternatively, it may be the pedal. Mechanisms pedals, and driver, using pads and heel of the foot, can pump the pedal in both directions from the neutral position. They would be well suited in this context, but an alternative might be giving the driver two pedals, that is, one for forward and one for reverse.

The tool used for working preprogram the Oia part for regulating the transmission ratio with the variator rollers, you can see on the drawing, and it is a hydromechanical. Briefly, including its main components is used, the comparator 52, which receives and compares (a) the position of the part to regulate the gear ratio and (b) the position of the variator rollers and modulates the force to move the rollers in the position specified by the user by using the part for regulating the transmission ratio. This force is created by the means 54 regulation of the hydraulic pressure applying fluid pressure to the actuator 28. The tool is also used for application of force feedback indicative of the torque of the variator, to part for regulating the transmission ratio to provide the user information about torque. This is done using tools 56 force feedback. The user is provided with means 58 control disable torque, which, through the medium 60-off torque is used to working detaching part 50 for regulating the transmission ratio of the variator and, thus, to reset the reactive torque of the variator, thus creating functionality that is similar in some ways to provide a clutch in a conventional manual transmission.

These objects will now be described in more detail, n the beginning with the means 52 of the comparator.

In this embodiment of the invention, the comparator uses a system of mechanical levers. The lever forming part 50 for regulating the transmission ratio, is rotated around a fixed point support 62 and passes over the fulcrum to a hinged connection with a connecting part 64, which, in turn, has a first pivot connection 65 of the comparator with a thrust of comparator 66. Therefore, the moving part 50 to regulate the gear ratio moves the first connection 65 thrust of the comparator.

The piston 26 in this embodiment the construction is connected with the thrust of the comparator by means of the cable 68 and means 70 time feedback function means 70 time feedback will be described below). Tool time feedback pivotally connected to the thrust of comparator 66 through a second connection 72 of the comparator. Therefore, the position of the second connection of the comparator corresponds to the position of the roller variator and, thus, the transmission ratio of the variator.

Between the first and second connections 65, 72 pull comparator comparator 66 has a control connection 74 with the thrust 76 of the control valve, in turn leading to the valve 78 pressure regulation.

The action of the lever means is in the setting state of the valve 78 of the pressure control on the basis of comparison ratio Chi is La variator with the provision of part 50 for regulating the transmission ratio.

The valve 78 pressure regulation forms part of the means 54 pressure regulation. He has a hole that receives the fluid under pressure delivered through line 80 to the fluid from the pump 82. The pump 82 draws from the sump 84 and provided with a relief valve 86. The pressure regulating valve has a hole communicating with two feed pipes S1, S2, adapted for the fluid, respectively, to opposite sides of the piston 26 of the variator. The pressure in the line S1 moves the piston 26 in the same direction. The pressure in the line S2 moves it in the other direction. The valve 78 regulation of the pressure is proportional valve with three States. In one he delivers fluid under pressure from the pump to the line S1. In another, he delivers fluid from the pump to the line S2. In the third, the intermediate state, he isolates the lines S1 and S2 from the pump pressure.

Consider what happens when the system was in equilibrium, the user moves the part 50 for regulating the transmission ratio. This produces a mismatch between the position control part and the gear ratio of the variator. The first connection 65 of the comparator moves. In this example, assume that it is moving to the left when looking at the figure. The control connection 74, thus also moves VL is in, causing the pressure regulating valve to take its second state, setting the pump pressure in the line S2 and merging of S1 into the crankcase. The resulting pressure on the piston 26 carries it to the left, as seen in the figure, moving the piston and changing the gear ratio of the variator. This movement is transmitted through the cable connection 68, moving the second connection of the comparator to the right. When this movement to the right the second connection of the comparator enough to offset the movement to the left of the first connection of the comparator, the valve 78 control the pressure returns to its third position to keep the pressure piston and conditions.

In fact, this servo system for controlling the position of the roller with the use of hydraulic drive and mechanical position feedback.

The user, in principle, capable to claim any respect at any time, and this can create difficulties. Very rapid change of the desired gear ratio may pendant, for example, to over-torque the wheels. The system was developed in connection with agricultural vehicles having a low gear ratio and a high torque motor, and in this context it is possible due to the negligence of the user to cause movement of the vehicle on two wheels is x, with its steering wheels in the air. To supply the user with information about the torque generated in the transmission, the tool 56 force feedback attaches to side to regulate the gear ratio of the user's force, which corresponds to the torque. As shown in figure 3, the tool force feedback provides a means of double-acting piston 88 and the cylinder 90. To the opposite sides of the piston are attached pressure taken directly from the respective feed lines S1, S2. Power is thus supplied to the portion to regulate the gear ratio, thus, proportional to the force exerted by the rollers of the variator piston 26 of the variator, although by suitable selection of the areas of the piston is provided that the first is less than last. As described above, the force acting on the variator rollers proportional to the reactive torque of the variator, resulting in the user feels the force feedback, which is directly linked to the reactive torque.

Turning now to the tool 58 control disable torque, note that it can be, for example, a hand lever or foot pedal. Using the 58 control the driver is able to set to zero the force applied to the variator rollers. Thus, the reactive torque of the variator is nelogicno is set to zero, and the variator becomes unable to maintain the output torque to the drive wheels of the vehicle. The effect is related to the separation in a conventional manual transmission in that it prevents the application transmission of torque to the wheels of the vehicle, but this is achieved without any physical disconnection of the engine from the wheels. Instead, it is based on the work removing the variator rollers from part 50 for regulating the transmission ratio. Part 58 to control the disabling torque acts on the tool 60 off torque generated in this embodiment of the invention as valve shut off torque, leading from one line S1 fluid supply to another S2. When it is open, the valve creates a path to equalize the pressure in the flow lines. When little or no pressure difference at the level of the piston significant power is not supplied to the variator rollers, and thus a significant reactive torque may not be supported. The closing of the valve 60 off torque restores the reactive torque. The valve 60 is a proportional valve, and the user can adjust the degree of its opening.

The management tool disabling torque may used similar type starting device, as described above, by first installing part 50 for regulating the transmission ratio to set forward or back and then progressively closing the valve 60 off torque for bringing the gear ratio in a controlled manner to the desired value, causing the acceleration of the vehicle from standstill. The management tool disabling torque can be used for smooth slow motion of the vehicle to the desired position, as when Parking. In this case, it is used to limit torque wheel again very similar to a normal grip. The management tool disabling torque can also be used to disable any torque slippage, for example, when the vehicle is parked with the engine running. However, it should be noted that the user may also control the transmission without the use of this management tool. For example, he/she can switch from forward movement to rearward movement and Vice versa using only part 50 for regulating the transmission ratio.

It is also necessary to describe the means 70 torque feedback. It is used to change gear ratio of the CVT based on the reactive moment. It contents the t cylinder 91, which can move with the help of cable connection 68 and which contains a piston 92 which is connected a connecting part 94 with the second connection 72 of the comparator. Inside the cylinder 91 are springs on both sides of the piston 92, shifting it to a specific position. A force applied to the piston when the control valve 78 regulatory pressure, are not large, and the spring is quite stiff, making movement of the piston 92 in the cylinder created by these forces is small or absent altogether. However, the piston is also exposed through the valve 96 pressures in lines S1/S2. In the sufficient reaction torque and, accordingly, a sufficient difference of the pressures in the lines S1 and S2 causes the piston to move from opposition to the springs, changing the actual length of the connection cable 68 to pull comparator 66. The result is a change gear ratio of the variator thus, to reduce the reactive torque, giving the system some flexibility and protection from excessive torque. Shut-off valve eliminates this possibility, insulating medium torque feedback from the pressures in lines S1/S2, when it is not needed.

Reference positions 98 and 100 in figure 3 indicated hydraulic shock absorbers. Their function is the damping of regulatel the aqueous oscillatory behavior of the variator by creating some resistance to flow in the piston 26 and out of it. The reference position 102 is indicated by-pass valve for reversal of the pressure supplied to the variator for going beyond the limits.

The above design is an example only of a possible variant of implementation of the present invention. It may be many other methods of implementing the invention. For example, the lever tool used to compare the position of the roller and the desired gear ratio, may be replaced by a valve of a known type in which the spool and the sleeve can be moved by the rollers and a part for regulating the transmission ratio.

1. The control device is a variable containing the driven user part for regulating the transmission ratio, the working tool connection part for regulating the transmission ratio with a moving part for transmitting torque of the variator, which allows the user to control the gear ratio of the variator, and a means of disconnecting the torque actuated by the user to detach part for regulating the transmission ratio from the movable part to transmit torque.

2. The device according to claim 1, which is driven by the user operating part is a hand lever or foot pedal.

3. The device according to claim 1 or 2, in which oterom working connection actuated by the user for regulating the transmission ratio with a moving part for the transmission of torque is effected using means, contains a comparator constructed and adapted to compare the position of the movable part for transmitting torque with the regulation part for regulating the transmission ratio and control the force applied to the movable part for transmitting torque, on the basis of the comparison result.

4. The device according to claim 3, in which the comparator is in the operating position is connected with a pressure regulating valve for regulating the pressure supplied to the hydraulic actuator, to create a force applied to the movable part for transmitting torque.

5. The device according to claim 1, in which the position of the movable part for transmitting torque is controlled using a hydraulic actuator, which receives the control hydraulic pressure, and a means of disconnecting torque holds the valve shut off torque, adapted to reset the specified control hydraulic pressure.

6. The device according to claim 5, in which a hydraulic actuator is the actuator double acting and receives first and second control hydraulic pressure through the first and second feed lines, and the difference between the control pressure determines the force applied to the movable part for transmitting torque, and valve shut off torque is outinen with feed lines so his opening equalizes pressure in them.

7. The device according to claim 1, in which the tool off torque is used for removing the control force applied to the movable part for transmitting torque.

8. A continuously variable transmission that contains a device according to any one of the preceding paragraphs and the variator.

9. Continuously variable transmission of claim 8, in which the variator is designed and adapted to create a reactive torque which is a function of the force applied to its movable part to transmit torque, and a means of disconnecting torque serves to fix the force and, thus, prevent maintaining variator torque reaction.

10. Continuously variable transmission of claim 8 or 9, in which the variator variator is of the type toroidal raceways and thrust bearings having at least two raceways between which passes a drive with continuously variable transmission ratio, at least one roller, and the roller is moving part for transmitting torque.

11. The control device is a variable containing the driven user part for regulating the transmission ratio, means of connection in the working position side to regulate peredatochnaya with a moving part for transmitting torque of the variator to allow the user to control the gear ratio of the variator and the means of application to parts for regulation the gear ratio of the force feedback, which varies in accordance with the force acting on the moving part to transmit torque.

12. The device according to claim 11, which is driven by the user operating part is a hand lever or foot pedal.

13. The device according to claim 11 or 12, in which the working connection actuated by the user for regulating the transmission ratio with a moving part for transmitting torque using products containing the comparator is designed and adapted to compare the position of the movable part for transmitting torque with the regulation part for regulating the transmission ratio and control the force applied to the movable part for transmitting torque, on the basis of the comparison result.

14. The device according to item 13, wherein said comparator is used to adjust the control hydraulic pressure that is supplied to the hydraulic actuator, which makes the specified force applied to the movable part for transmitting torque.

15. The device according to 14, in which the control hydraulic pressure is also supplied to the actuator with feedback, which exerts a force feedback part for regulating the transmission ratio./p>

16. A continuously variable transmission that contains a device according to any one of 11 and 15 and the variator.

17. Continuously variable transmission according to clause 16, in which the variator is designed and adapted to create a reactive torque which is a function of the force applied to its movable part to transmit torque, and force feedback, thus, corresponds to the reactive torque of the variator.



 

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FIELD: machine building.

SUBSTANCE: invention relates to device for changing of transmission ratio, particularly to gears with rolling engagement in toroidal track. Variator contains input disk (18, 20), installed rotary; output disk (22), installed rotary co-axial with input disk (18, 20); rollers (30, 32), by means of which it is passed rotation between input disk and output disk; pistons (36, 38) of double-acting, each of which interacts on corresponding one of rollers. Variator also contains levers (44, 60), each of which is connected to corresponding one of rollers (30, 32) and connected to it positioner (36, 38), influencing on roller for control of transmission ratio of variator.

EFFECT: creation of considerabl more packaged design of variator.

40 cl, 9 dwg

FIELD: machine building.

SUBSTANCE: variable-speed drive unit comprises master and slave toroidal wheels (2, 3) and roller (6). Their generatrices are made in the form of convex and concave curved surfaces. Due to arrangement of generatrices of working surfaces in master and slave elements in accordance with a certain dependence, area of friction pairs contact is increased.

EFFECT: improved kinematic characteristics of variable-speed drive unit.

3 dwg, 1 tbl

FIELD: machine engineering, namely variable speed drives with continuously changing relation of revolution number of driven and driving shafts.

SUBSTANCE: friction tore ring type variable speed drive includes driving and driven discs made of set of rings 2, 3 forming together toroidal surface and joined with driving and driven shafts 1, 4 through tie rods 12, 16 at spring-loaded gap outside aid tie rods. Rings 2, 3 may move one relative to other and relative to driving and driven shafts along splines in parallel to main axis of variable speed drive. Ball 10 is used as frictional intermediate member between them; said ball transmits rotation of rings of driving disc to rings of driven disc and it rotates in holder 5 in direction set by means of rings and around main axis of variable speed drive. Actuating mechanism successively forces mutually opposite rings of driving and driven discs for providing their friction contact. Monitoring and control mechanism includes control gear wheel 8 working in pair with ring-like gear wheel 7 secured to holder 5; flat coiled spring whose one end is joined with housing and whose other end is joined with holder 5 or with control gear wheel 8.

EFFECT: improved design, simplified process for monitoring and controlling gear ratio.

5 cl, 7 dwg

FIELD: mechanical engineering.

SUBSTANCE: device comprises casing (160) mounted in the vicinity of roller (100) and pipeline for supplying fluid. Peripheral section (162) of the inner side of casing (160) is positioned close to the outer periphery of the roller. Two radial sections of the inner side are in the vicinity of appropriate side surfaces of roller (100). As a result, a chamber for supplying fluid is formed between roller (100) and casing (160). The pipeline for supplying fluid is mounted for permitting supply of fluid to the chamber for receiving fluid.

EFFECT: enhanced reliability.

14 cl, 10 dwg

FIELD: mechanical engineering.

SUBSTANCE: friction toroidal variator comprises inlet disk (2) and outlet disk (3) provided with toroidal surfaces, friction roller (5), spider whose one axle is provided with roller (5), holder (8) of friction roller, control mechanism, and mechanism for control of gear ratio. The second axle of the spider is fit in holder (8) of the friction roller that can rotate around the main axle of the variator. The control mechanism and mechanism for control of gear ration are made of gear sector (9) that rotates on the second axle of the spider secured to the first axle of the spider and housing (12) by means of worm gearing and spring (15) secured in housing (12) and connected with holder (8) directly or through the reduction gear.

EFFECT: simplified control and control of gear ratio.

8 dwg

Roller device // 2226631
The invention relates to rollers and cooling during use, in particular to the rollers used in variable-speed drives with toroidal raceway

The invention relates to mechanical engineering, in particular to a device transmission with stepless gear ratio

FIELD: mechanical engineering.

SUBSTANCE: friction toroidal variator comprises inlet disk (2) and outlet disk (3) provided with toroidal surfaces, friction roller (5), spider whose one axle is provided with roller (5), holder (8) of friction roller, control mechanism, and mechanism for control of gear ratio. The second axle of the spider is fit in holder (8) of the friction roller that can rotate around the main axle of the variator. The control mechanism and mechanism for control of gear ration are made of gear sector (9) that rotates on the second axle of the spider secured to the first axle of the spider and housing (12) by means of worm gearing and spring (15) secured in housing (12) and connected with holder (8) directly or through the reduction gear.

EFFECT: simplified control and control of gear ratio.

8 dwg

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