Friction tore ring-type variable speed drive

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

 

The invention relates to the field of engineering, namely the friction transmission with continuous change of gear ratio, and more particularly to a transmission, in which the force is transferred through the rolling of the rollers on the tracks with toroidal surface.

A variable of this type in General contain the input and output disks, the surface of which, facing each other, made as part of the Torah, and friction discs relating to these surfaces, and a mechanism for changing the position of the friction discs. In progressive transmission, described in EN 2087777, GB 1395319, EP 0078125, EP 0133330, the position of the disks is changed by hydraulic cylinders. It is clear that such mechanisms have a large number of parts, structurally complex, require a supply of hydraulic fluid, the formation of channels within the body molding, application of sealing pressure.

Known variator US 3276279 chosen for the prototype, which changes the position of the friction disk, changing the angle of the plane of its rotation. Variable contains the input and output disks with toroidal raceways. Between the toroidal surfaces are friction rollers. Each friction roller through bearings freely seated on one of the axes of the cross, which is the axis of rotation of the friction roller. This axis represents internal to LCO bearing. The second axis crosses defines the cylinder planted side surface of the holder associated with the case. This cylinder is made with the piston double-acting, coupled with the roller carrier. The cylinder is connected to the input and output hydraulic conclusions. The change in the differential pressure acting on the piston of the fluid changes the angle of the plane of rotation of the roller, and accordingly, the gear ratio. The pressure changes of the hydraulic servomotor. The variator provided with a device control ratio according to the position of the servo motor. The main disadvantages of the prototype are the complexity of the control mechanism gear ratio, including the hydraulic system (pump, pressure sensors and fluid flow, a complex system of tubes for supplying fluid), resulting in high losses and a relatively small range of change of gear ratio is determined by the angle of deviation of the friction disk (about 50 degrees).

Thus, the object of the invention is to provide a simple and reliable variator controlled setting of gear ratio while expanding the range of its change. In addition, the object of the invention is to increase efficiency.

The technical result of the possible invention is to simplify monitoring and control of the population transfer relationship with the fluid, accurate and, if necessary, accelerated in one embodiment, changing modes of operation of the variator.

Friction tore variable that contains the master and slave drives with toroidal surfaces and at least one friction intermediary between them, interacting with them toroidal surfaces, the mechanism and control of gear ratio to change the inclination of the rotation friction of the mediator relative to the master and slave drives, wherein the master and slave drives is executed by a set of rings, together forming a toroidal inner surface and connected to the master and the slave shaft rod spring-loaded backlash from the outside rods, rings relative to each other and the drive and driven shafts have the ability to move in the slots parallel to the main axis of the variator, friction mediator is the ball that transmits the rotation from the ring lead to the ring of the slave disk and rotating the holder at the specified ring direction around the main axis of the variator, while each ring is spring-loaded by the balls from the inside out so that there is a constant gap between the rings and balls, and the actuator sequentially presses the opposing ring master and slave discs for frictional contact, the mechanism control includes control of the Commissioner gear, paired with a ring gear attached to the holder, flat twisted spring, one end connected to the housing, and the other with the holder or with control gear, as well as variant, in which the actuator changes of gear ratio includes no rod rings (forming disks), each arm is spring-loaded with a force in the direction of the friction of the balls, the holder of the friction balls may front to move on a common axis and output shafts regardless of its rotation; and two control gear - one reduction is connected with the external gear holder, the other with thread the outer ring of the holder; and a variant in which the mechanism of the change gear ratio includes a semicircular rod drives the pressing rings for friction balls in the guide, having on itself toothed thread reducer connection with the control gear and the control gear is connected with the gear holder; and a variant in which the mechanism of the change gear ratio includes a gear attached to the holder friction balls, resulting from fixed in the housing pinion rotation relative to the holder, which drives a gear (not threaded), of circular cross rail with the possibility lane is movement along the axis, chain with teeth for coupling with the rack inside the rod rings and the master, the slave shafts and United through the hole in the rod with clamping rollers; and a variant in which the mechanism of the change gear ratio includes a ring around the friction ball carrier friction balls and replacement gear.

The problem is solved in that the friction tore the variator, as a prototype, contains coaxial input and output disks with toroidal surfaces and at least one friction mediator between them interacting with their surfaces, the holder of the friction balls and mechanisms for monitoring, management and Executive gear ratio by changing the angle of deviation of the line 2 spots frictional contact for each friction broker, consistently pressing the opposing ring master and slave drives, and due to this change of the angle of rotation of the friction of the ball relative to the axis of the input and output disks.

Unlike the prototype of the input and output disks formed by the rings, the holder has the possibility of rotation around the main axis of the variator. Functionally, the mechanisms for monitoring, control gears 7, 8, the spring 14. The Executive is a mechanism that provides pressure opposing the friction rings Sha the am and change its location (pressure).

The actuator is made in 4 versions:

1 - the holder of the ball (balls), rotating, moving on slots axis on which it rotates, front, moving the spot of the ball contact angle of rotation from the ring, constantly pressed by the rod to the balls, Executive - gear 9, the ring 6, the spring 11, the rod 12, 16.

2nd - rod 18, the guides 19, the disk 20 along with fixed in the housing guides 19 to rod 18, which change through the disk 20 to the opposing ring friction contact. While rotation of the rings of the disks 20, moving in the plane or parallel to the axis OO1,click to next slide "pressed" from the Orb 10, by its spring gap, the ring.

3rd gear 21-26, chains 30, 31, the rail 27.

4th - the role of the gearbox of gears 21-26 third option takes the ring 32 (figure 7), which rotates with the rotation of the holder 5 around an axis parallel OO1like a washer or bearing, is provided from the fixedly mounted in the housing of the gear 33 and causes the rail 27, which causes the chains 30, 31.

2-nd, 3-th and 4-th - holder, mounted on the axis of the center, is connected by reduction with housing control gear, a gearbox or gear is connected with the actuating mechanism, opposing clamping ring master and slave drives to the ball. The change of gear ratio is the ri of rotation of the holder - through reduction are rollers or discs, clamping consistently rings.

The invention is illustrated in graphic materials, where figure 1 is a view in longitudinal section of the first variant, in the figure 2 is a view in longitudinal section of the second variant, on the figure 3 is a transverse view of the holder of the balls with the ring gear of the 2nd option on the figure 4 - cross section of a second variant, the figure 5 is a view in longitudinal section of the 3rd option on the figure 6 is a transverse view of the holder with a fixed gear and a stationary annular gear behind him, the figure 7 is a view in longitudinal axis OO1the section of the holder with the replacement gear ring on it.

For all four variants of the variator consists of a master 1 and slave 4 shafts attached to them by the rods 12 and 16, at least three on each of the shafts, rings 2 of the shaft 1 and 3 of the shaft 4, together forming a toroidal (2, 3, 4 options) from the inside surface and keeping the rods 12, 16 with the spring loaded gap on the outside of the rods. Shafts with rings rotate around the main axis OO1. At least one friction ball 10 is located between the rings 2 and 3, forming disks. The holder 5 of the friction balls 10 can rotate in the axis OO1to the holder attached annular external gear 7, working in contact with the control gear 8 on the shaft in the housing 15. On the gear 8 (and/ or n is the holder 5) inner end fixed flat twisted spring 14 - figure 1-7, the second end of the spring is fixed in the housing of the CVT 15.

Options

1. Figure 1 - the holder 5 when the rotation is moved to the front on the splines of the shaft 13 with the ring 6 on yourself thread, paired with at least one pinion 9, fixed or manageable "rotating". Rod 12 and 16 hinged to decline parallel to the axis OO1. A spring or the torsion shaft 11 of 1,4 to the rods 12, 16, standing on the hinges 17, presses against the friction balls 10 sets of rings 2 and 3, forming the "disks" with straightened working surface.

2. Figures 2, 3, 4 - managing dual gear 8 is paired with the gear 7 of the holder 5 and polyolefines rod 18 with gear thread, which can move in the guide 19. The rod 18 at the ends has a lever rotating disks 20.

3. Figures 5, 6 of the holder 5 rotates leads attached to the gearbox, the gear 21 which is driven by the fixedly mounted in the housing 15 of the gear 33, and drives the gear 22; 22-I leads 23rd with the shaft 24 and gear 25; 25-I leads 26th. 26th involute gear (cog) of circular cross rail 27 (not threaded), movable fingers 28, 29 of the shafts 1 and 4. Rake 27 causes the chains 30, 31 with fixed their teeth, paired with the rail 27, moving inside the hollow rod 12, 16 and the shafts 1 and 4 through the slots in the rods, combined the with clamping rollers.

4. Figure 7 - the role of the gearbox of the gears 21, 22, 23, 25, 26 performs ring 32 around the ball 10 on the holder 5.

The optimal number of rods 12, 16 on each side three. Rings 2 and 3 relative to each other are moved in parallel, for example on the slots. Each ring is spring-loaded with a force of springs from 10 balls from the inside out so that in 2, 3 and 4 embodiments, there is a constant gap between the rings 2, 3 and 10 balls, in addition to pressed actuator for frictional contact. The ball 10 in the holder 5 can rotate in any specified ring direction using magnetic, electromagnetic forces, anti-friction pads in the holder 5 and oils, as well as bearings and their components.

Orientation in the description of operation of the variator: from the drive shaft 1, the rotation of the driving shaft 1 to the right, but the second option. The initial position of the holder 5 and the rings all the options is "A" (figures 1, 2, 5), in which friction ball 10 is clamped between the ring disc 3 of the smallest diameter and the ring disc 2 greatest "And" VM/VD=1/z, B=1/1, "B"=z/1, where VM is the driven shaft, z - the number of changes of gear ratio in one direction. For these kinematic schemes z≥4.

In the absence of the regular load and braking on the shafts 1 and 4 in any position except "A", the holder 5 is rotated counterclockwise (left) under the action of the spring 14 (shown in afigure 7). The ball 10 in the result of crowding takes the position "a" between the rings. In option 2, to the position "a" holder 5 rotates clockwise.

In position "A" the resistance of the spring 14 is minimal, in position "B" - as much as possible.

14 - flat twisted spring (in this case) of the resistance to rotation of the holder 5 to the position "B", for discrete trim holder 5; when increasing the load on the shaft 4 is at a greater value, when declining - less.

For all four versions of this variable is as follows. The initial position "A" as the release from the burden of the slave disk 3 and/ or the host 2 (if the opposing rings have not been in this position before) spring 14 connected with the holder 5 directly or reduction gear 8, unwound (releasing tension), together with the holder 5, which rotates, causes the actuator, consistently changing pressed against the ball 10 to the opposing ring (discs 2, 3), and the point of frictional contact on disk 2 moves from the smallest radius to highest, and on disc 3 contrary to the position "a".

The shaft 1 with disk 2 is rotated by a motor, the shaft 4 with the disk 3 rotates in the opposite direction and rotates the transmission, the driver of the transport, etc. For example as follow description of the action is via the variator for Moto, vehicles and other

At the beginning of the rotation shaft 1 and the existence of a regular load on the shaft 4, the clutch is transport from the place, from position "A" VM/VD=1/z disc 2 ring in frictional contact rotates the ball 10, as the shaft 4 has a resistance to rotation of the ball 10, and the resistance of the spring 14 is in position "A" minimally, enjoys the rotation of the ball 10, the holder 5, the disk 3 is...as the rotation from the motor shaft 1 with disc 2 of the ball 10 and from the holder 5, the resistance to twisting of the spring 14 increases, the actuator, associated with reduction, as a rule (options 2, 3, 4), with the holder 5, when the rotation is driven by sequentially changing the opposing ring friction contact from the position "A" to "B" - N⇒z/1, when increasing the resistance of the spring 14 associated with the rotation of the holder 5 and changed the balance ratio exceeds the resistance on the shaft 4, is changing the balance of power, halts the rotation of the holder 5, begins the treatment of disc 3, discretely set the new value of the rotation shaft.

The maximum resistance of the spring in the greatest ratio z/1 corresponds to the maximum motor torque - position "B". When reducing the resistance to rotation of the shaft 4 (the transport is started and accelerated) the holder 5 under the action of the spring 14 rotates back Nȝ A.

The action of the spring 14 when the variable is a counter - rotation of the holder 5 in the direction of rotation of the engine at a predetermined ratio reduction worm pairs... its resistance defined in each ratio, respectively laid parameters.

Control gear 8 is used for adjustment and locking of the rotation of the holder 5 - changes the gear ratio and can operate from a special motor controller, for example. The main load is adequate at each value of resistance shall be borne by the spring 14.

For option 1:

During operation, when the slowdown is due to the increase of the resistance to rotation of the shaft 4 is fond of the rotation of the right holder 5, as the left threaded ring 6 is in contact with the control gear 9 of the holder 5, rotating, moving on the splines of the shaft 13 to the shaft 1, while the position of contact spots on the balls of 10: N⇒z/1. At the beginning of adequately increasing the ratio of rotation of the shaft 4 stops the rotation of the holder 5 is at a higher resistance of the spring discretely installed a new gear ratio. When slowing down or stopping of the driving shaft 1 against the clutch disc 3, rotating to the left, carries through friction ball 10 in the left rotation of the holder 5, whereby it moves to the shaft 4, while N⇒1/z, and the spring 14 reduces the resistance. Drawscene ratio N "spinning" gear or sector 9.

For option 2:

The shaft 1 is rotating to the left. When slowing down (nevedenii) of the shaft 4 to the right holder 5 rotates to the left, his gear 7 rotates control dual gear 8 (usually 2)that lead rod with gear thread" 18 moving in the guides 19. Moving around the geometric center of the friction of the ball, barbell pressing discs 20 on the ring change N⇒z/1=VM/VD. When slowing down or nevedenii (left) shaft 1: N⇒1/z.

For option 3, 4:

When slowing down or nevedenii shaft 4 to the left relative to the shaft 1 shaft 1 through friction ball 10 carries in rotation to the right holder 5 with a fixed gear or ring 32 with an external thread and teeth, the pinion gear 26 causes the toothed circular cross rail 27 having a "stroke" on the fingers 28, 29 of the shafts 1, 4 leading chains 30, 31 attached to them rollers N⇒z/1 - position.

The gear 21 gear is attached to the casing 15 is stationary gear 33 during the rotation of the holder 5. The chains 30, 31 can move inside the "tunnel" - motionless (relative to their shafts rods 12, 16, rolling in the shafts 1, 4. Push the roller chains 30, 31 attached to one of the links to move the roller slot in the rod 12, 16.

When the relative slowing or stopping of the driving shaft 1, the rotation of the holder 5 to the left N⇒1/z "A".

The end and the beginning of the work WA is iator in all above described embodiments, the position "a" or close to it will ensure a smooth beginning and end of operation of the variator, as well as the change in N occurs only when the relative overrunning friction balls - the rotation of the holder 5 and the continuation.

1. Friction tore variable that contains the master and slave drives with toroidal surfaces and at least one friction intermediary between them, interacting with them toroidal surfaces, the mechanism and control of gear ratio to change the inclination of the rotation friction of the mediator relative to the master and slave drives, wherein the master and slave drives is executed by a set of rings, together forming a toroidal inner surface and connected to the master and the slave shaft rod spring-loaded backlash from the outside rods, rings relative to each other and the drive and driven shafts have the ability to move in the slots parallel to the main axis of the variator, friction mediator is the ball that transmits the rotation from the ring lead to the ring of the slave disk and rotating the holder at the specified ring direction around the main axis of the variator, while each ring is spring-loaded by the balls from the inside out so that there is a constant gap between the rings and balls, and the actuator sequentially presses the opposing ring master and slave discs for frictional contact mechanism con the supervision and control includes control gear, paired with a ring gear attached to the holder, flat twisted spring, one end connected to the housing, and the other with the holder or with the control gear.

2. Friction tore the variator according to claim 1, characterized in that the actuator changes of gear ratio includes no rod rings, forming disk drives, each arm is spring-loaded with a force in the direction of the friction of the balls, the holder of the friction balls may front to move on a common axis and output shafts independently of its rotation, as well as two control gears, one of them is the reduction connected with external gear holder, the other with a threaded outer ring of the holder.

3. Friction tore the variator according to claim 1, characterized in that the mechanism of change of gear ratio includes polyolefine rod drives the pressing rings for friction balls in the guide, having on itself toothed thread for reducing connection with the control gear and the control gear is connected with the gear holder.

4. Friction tore the variator according to claim 1, characterized in that the mechanism of change of gear ratio includes a gear attached to the holder friction balls, resulting from fixed in the housing of the gear when the treatment in relation to the holder, which leads toothed circular cross rail with the possibility of movement along the axis of the chain with the teeth for coupling with the rack inside the rod rings and leading, driven shafts and connected through the slot in the rod with clamping rollers.

5. Friction tore the variator according to claim 1, characterized in that the mechanism of change of gear ratio includes a ring around the friction ball carrier friction balls.



 

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