CN215634772U - Eight-claw mechanism applied to CVT (continuously variable Transmission) - Google Patents

Abstract

The utility model relates to an eight-claw mechanism applied to a CVT (continuously variable transmission) speed changing device, which comprises an eight-claw body, a T-shaped sliding block, a spring seat, a positioning mandrel, a return spring and a plug, wherein the front end and the rear end of the eight-claw body are arranged in a sliding chute of a turntable through the T-shaped sliding block, the spring seat is fixedly connected with the T-shaped sliding block through a screw, the positioning mandrel is radially arranged on the spring seat, the return spring is sleeved on the positioning mandrel, and the plug is arranged on the turntable and is positioned above the return spring. The eight-claw body on the side of the driving rotary disc rotates along with the driving rotary disc while stretching radially, and transmits power to the side of the driven rotary disc through a chain; the eight-claw body on one side of the driven turntable stretches in the radial direction, and meanwhile, the chain transmits power to the eight-claw body on one side of the driven turntable to drive the driven turntable to rotate, so that power output is realized; the inner teeth of the chain are meshed with the outer teeth at the tops of the eight-claw bodies to form a rotating radius enveloped by the chain, and the rotating radius can be continuously increased or reduced, so that the rotating transmission ratio of the driving turntable and the driven turntable can be changed.

Description

Eight-claw mechanism applied to CVT (continuously variable Transmission)

Technical Field

The utility model relates to the technical field of transmissions, in particular to an eight-claw mechanism applied to a CVT (continuously variable transmission).

Background

The transmission of the automobile speed changer is realized by a gear transmission, so that the power of an engine is transmitted to a transmission shaft, and the requirements of the automobile on traction and running speed under different road conditions are met.

At present, in the CVT (continuously Variable transmission) transmission of the same type, steel belt transmission is generally adopted, and the steel belt and the cone surface of a working wheel are in friction transmission. When the load is increased to a critical value, the steel belt can generate a slipping phenomenon due to insufficient torque value, so that the power output is insufficient, the acceleration is slow, the power transmission is greatly limited, and the defects of the CVT gearbox in a transmission system are caused.

SUMMERY OF THE UTILITY MODEL

It is a primary object of the present invention to overcome at least one of the disadvantages of the prior art and to provide an eight-pawl mechanism for a CVT transmission that is capable of high torque, high power transmission.

In order to realize the technical scheme, the utility model adopts the following technical scheme:

according to one aspect of the utility model, an eight-claw mechanism applied to a CVT (continuously variable transmission) comprises eight-claw bodies, a T-shaped sliding block, a spring seat, a positioning mandrel, a return spring and a plug screw, wherein the eight-claw bodies are arranged in a plurality of numbers, the front end and the rear end of each eight-claw body are arranged in a sliding groove of a turntable through the T-shaped sliding block, the spring seat is fixedly connected with the T-shaped sliding block through a screw, the positioning mandrel is radially arranged on the spring seat, the positioning mandrel is sleeved with the return spring, and the plug screw is arranged on the turntable and located above the return spring.

According to an embodiment of the present invention, the sliding groove is a sliding track in which the eight-claw body extends and contracts in the radial direction, the T-shaped sliding block is in sliding fit with the sliding groove of the rotating disc through a gap, and the sliding groove is a T-shaped groove.

According to an embodiment of the present invention, the eight-claw mechanisms are two groups, and the rotating discs are divided into a driving rotating disc and a driven rotating disc, wherein one group of eight-claw mechanisms is installed on the driving rotating disc, and the other group of eight-claw mechanisms is installed on the driven rotating disc.

According to one embodiment of the utility model, the bottom of the eight-claw body is of an inclined plane structure, and the top of the eight-claw body is provided with a transmission tooth form; the inclined plane structure at the bottom of the eight-claw body is in contact with the surface of the conical shaft, and the conical shaft pushes the eight-claw structure to do radial telescopic motion when moving axially. Wherein, the conical shaft realizes the rotation through conical shaft drive mechanism.

When the big end of the conical shaft moves outwards axially, the driven turntable of the eight-claw body is pushed to extend out, the tensioning chain increases and the gyration radius formed by enveloping increases; when the conical shaft moves reversely, the eight-claw body retracts radially under the action of the return spring, the chain is pressed, and the revolving radius formed by enveloping is reduced; eight claw bodies in the driving turntable rotate along with the turntable while radially extending and retracting, and power is transmitted to the driven turntable through chains; the eight claw bodies of driven carousel one side are when radially stretching out and drawing back, and the chain transmits power for the eight claw bodies of driven carousel one side to drive driven carousel rotation, realize power take off. The scheme requires that the moving speeds of the two sets of conical shafts are required to be kept synchronous, so that the synchronism of radial expansion of the two sets of eight-claw mechanisms can be ensured, and a continuous, stable and variable transmission ratio is formed.

Wherein, connect through the chain between two sets of eight claw mechanisms, realize power transmission. Furthermore, the internal teeth of the chain are meshed with the external teeth at the tops of the eight-claw bodies, meanwhile, the tension toothed chain realizes power transmission, and the rotating radius enveloped by the chain can be continuously increased or reduced, so that the rotating transmission ratio of the driving turntable and the driven turntable is changed.

According to one embodiment of the utility model, the T-shaped slider is fixed on the eight-claw body by a screw; furthermore, screw holes are formed in the eight-claw body in the radial direction and the axial direction, hole positions are also formed in corresponding positions on the T-shaped sliding block, and the eight-claw body is fixed with the screw holes after penetrating through the hole positions on the T-shaped sliding block through screws.

According to an embodiment of the present invention, the T-shaped sliding block is divided into a first T-shaped sliding block and a second T-shaped sliding block, the first T-shaped sliding block is disposed at the front end of the eight-claw body, and the second T-shaped sliding block is disposed at the rear end of the eight-claw body.

According to one embodiment of the utility model, the cross section of the T-shaped sliding block is in a T shape, a plurality of penetrating screw holes are formed in the T-shaped sliding block, a limiting block is arranged on one side of the T-shaped sliding block, which is in contact with the eight-claw body, the lower surface of the limiting block is in contact with the top of the eight-claw body, and the penetrating screw holes are formed in the limiting block.

According to the technical scheme, the utility model has at least one of the following advantages and positive effects:

the eight-claw body on the side of the driving rotary disc rotates along with the driving rotary disc while stretching radially, and transmits power to the side of the driven rotary disc through a chain; the eight-claw body on one side of the driven turntable stretches radially, and meanwhile, the chain transmits power to the eight-claw body on one side of the driven turntable and drives the driven turntable to rotate, so that power output is realized; the internal tooth of chain meshes with the external tooth at eight claw body tops mutually, and tight profile of tooth chain realization power transmission rises simultaneously, has formed the radius of rotation that can last increase or reduce with the chain envelope to realized changing the rotatory drive ratio of initiative carousel, driven carousel.

The utility model adopts the meshing transmission pair to replace the traditional friction transmission pair, can overcome the problem of slippage in power transmission in the prior art, can transmit larger torque by adopting chain meshing transmission, and realizes high-power output.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of an eight-claw mechanism according to the present invention;

FIG. 2 is a cross-sectional view taken along line K-K of the eight-prong mechanism of FIG. 1;

FIG. 3 is a radial cross-sectional view of two sets of eight-pawl mechanisms in the extreme position;

FIG. 4 is an axial cross-sectional view of the eight-jaw mechanism on the drive disk in the minimum position;

FIG. 5 is an axial cross-sectional view of the eight-jaw mechanism on the driven turntable at the maximum position;

FIG. 6 is a schematic structural diagram of a first T-shaped slider;

FIG. 7 is a schematic view of another view structure of the first T-shaped slider;

FIG. 8 is a schematic structural view of a second T-shaped slider;

FIG. 9 is another structural diagram of the second T-shaped slider at another viewing angle.

The reference numerals are explained below:

1-a first spring seat, 2-a first T-shaped sliding block, 3-an eight-claw body, 4-a second T-shaped sliding block, 5-a second spring seat, 6-a positioning mandrel, 7-a return spring, 8-a first screw, 9-a second screw, 10-a countersunk screw, 11-a driving turntable, 12-a chain, 13-a first conical shaft, 14-a plug, 15-a return spring, 16-a second conical shaft and 17-a driven turntable.

Detailed Description

In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, refer to an orientation or a state relationship based on that shown in the drawings, which is for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention are understood according to specific situations.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the utility model herein.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 9, the eight-claw mechanism applied to the CVT speed changing device comprises a plurality of eight-claw bodies 3, T-shaped sliders, spring seats, positioning mandrels 6, return springs 7 and screw plugs 14, wherein the eight-claw bodies 3 are arranged in a plurality of numbers, the front ends and the rear ends of the eight-claw bodies 3 are arranged in sliding grooves of a turntable through the T-shaped sliders, the spring seats are fixedly connected with the T-shaped sliders through screws, the positioning mandrels 6 are radially arranged on the spring seats, the return springs 7 are sleeved on the positioning mandrels 6, the screw plugs 14 are arranged on the turntable and located above the return springs 7, the sliding grooves are sliding tracks for radial extension of the eight-claw bodies 3, the T-shaped sliders are in clearance sliding fit with the sliding grooves of the turntable, and the sliding grooves are T-shaped grooves. In this embodiment, the number of the eight claw bodies 3 is eight, and as shown in fig. 3, the eight claw bodies 3 of the two sets of eight claw mechanisms are uniformly and symmetrically distributed in the turntable; and the return spring 7 can ensure that the eight-claw body 3 can reversely and automatically retract under the resilience action of the return spring 7 after extending outwards.

The eight-claw mechanism is divided into two groups, the rotating discs are divided into a driving rotating disc 11 and a driven rotating disc 17, one group of eight-claw mechanism is arranged on the driving rotating disc 11, and the other group of eight-claw mechanism is arranged on the driven rotating disc 17. Specifically, as shown in fig. 2, the bottom of the eight-claw body 3 is a bevel structure, and the top thereof is provided with a transmission tooth form, i.e., external teeth, which are uniformly distributed on the outer circle of the eight-claw body 3. The inclined plane structure at the bottom of the eight-claw body 3 is in contact with the surface of the conical shaft, and the conical shaft pushes the eight-claw structure to do radial telescopic motion when moving axially. Wherein, the conical shaft realizes the rotation through conical shaft drive mechanism. The cone shafts are divided into two groups, namely a first cone shaft 13 and a second cone shaft 16. The bevel angle of the eight-claw body 3 is equal to the bevel angle of the conical shaft, and the bevel is in contact fit with the outer surface of the conical shaft.

As shown in fig. 4, when the big end of the conical shaft moves axially outwards, the driven rotary table 17 of the eight-claw body 3 is pushed to extend out, the tensioning chain 12 is tensioned, and the revolving radius formed by enveloping increases; when the conical shaft moves reversely, the eight-claw body 3 retracts radially under the action of the return spring 7, the chain 12 is pressed, and the revolving radius formed by enveloping is reduced; as shown in fig. 5, the eight-claw body 3 in the driving turntable 11 rotates along with the turntable while extending and contracting in the radial direction, and transmits power to the driven turntable 17 through the chain 12; while the eight-claw body 3 on one side of the driven turntable 17 extends and retracts in the radial direction, the chain 12 transmits power to the eight-claw body 3 on one side of the driven turntable 17 and drives the driven turntable 17 to rotate, and power output is achieved. The scheme requires that the moving speeds of the two sets of conical shafts are required to be kept synchronous, so that the synchronism of radial expansion of the two sets of eight-claw mechanisms can be ensured, and a continuous, stable and variable transmission ratio is formed.

The two groups of eight-claw mechanisms are connected through a chain 12 to realize power transmission. Furthermore, the internal teeth of the chain 12 are meshed with the external teeth at the top of the eight-claw body 3, meanwhile, the tension toothed chain realizes power transmission, and the rotating radius enveloped by the chain 12 can be continuously increased or reduced, so that the rotating transmission ratio of the driving turntable 11 and the driven turntable 17 is changed.

As shown in fig. 2, 6, 7, 8 and 9, the T-shaped sliding block is fixed on the eight-claw body 3 through screws; furthermore, screw holes are formed in the eight-claw body 3 in the radial direction and the axial direction, hole positions are also formed in corresponding positions on the T-shaped sliding block, and the eight-claw body is fixed with the screw holes after penetrating through the hole positions on the T-shaped sliding block through screws. Furthermore, the T-shaped sliding block is divided into a first T-shaped sliding block 2 and a second T-shaped sliding block 4, the first T-shaped sliding block 2 is arranged at the front end of the eight-claw body 3, and the second T-shaped sliding block 4 is arranged at the rear end of the eight-claw body 3. The T-shaped slider is cross-sectionally personally submitted the T and is equipped with a plurality of screw holes that run through on the T-shaped slider, and one side that the T-shaped slider contacted with the eight claw body 3 is provided with the stopper, the stopper lower surface contacts with the top of the eight claw body 3, be equipped with the screw hole that runs through on the stopper. In this embodiment, as shown in fig. 2, the bottom of the first T-shaped slider 2 axially penetrates through the hole site through the first screw 8 to be connected with the screw hole of the eight-claw body 3, and the radial direction of the first T-shaped slider 2 penetrates through the screw hole on the limiting block through the second screw 9 to be connected with the screw hole of the eight-claw body 3. The spring seat is divided into a first spring seat 1 and a second spring seat 5, the first spring seat 1 is fixed with the first T-shaped sliding block 2 through a sunk screw 10, and the second spring seat 5 is fixed with the second T-shaped sliding block 4 through the sunk screw 10.

As shown in fig. 4, a set of eight-claw mechanisms is symmetrically arranged in the driven turntable 17 along the radial direction, and the small end of the second taper shaft 16 supports each eight-claw body 3 at the minimum position, at which the rotating radius of the eight-claw body 3 enveloped and formed with the chain 12 is the minimum value. When the second cone shaft 16 moves leftwards, each eight-claw body 3 on the second cone shaft 16 extends outwards; when the second cone shaft 16 reaches the stroke end, the rotating radius of the eight-claw body 3 and the chain 12 in enveloping forming reaches the maximum value. When the second cone shaft 16 moves back to the right, each of the eight claws 3 retracts inward, and the radius of rotation of the eight claws 3 enveloping the chain 12 begins to decrease.

The eight-claw mechanism shown in fig. 5 is symmetrically arranged in the radial direction in the driving turntable 11, and the large end of the first conical shaft 13 supports each eight-claw body 3 at the maximum position, at which the rotating radius formed by enveloping the eight-claw bodies 3 and the chain 12 is the maximum value. When the first conical shaft 13 moves back to the left, the eight claws 3 on the shaft are all contracted inwards; when the first conical shaft 13 reaches the stroke end, the rotating radius of the eight-claw body 3 and the chain 12 in enveloping formation reaches the minimum value.

In normal operation of the two sets of eight-claw mechanisms of fig. 4 and 5, the eight-claw mechanisms in the driving turntable 11 and the eight-claw mechanisms in the driven turntable 16 are simultaneously actuated, and when the eight-claw bodies 3 in the driving turntable 11 extend outward, the eight-claw bodies 3 in the driven turntable 17 retract inward. In order to maintain the tensioning force of the eight-claw mechanism and the chain 12, the first conical shaft 13 and the second conical shaft 16 must move towards each other at the same time, and the technical scheme requires the synchronism of the two sets of conical shaft driving mechanisms.

The working principle of the utility model is as follows: the two sets of cone shaft driving mechanisms synchronously move in a reciprocating manner in opposite directions to push the two sets of eight-claw mechanisms to do radial telescopic movement simultaneously, and the turning radius formed by the two sets of eight-claw mechanisms and the toothed chain in an enveloping manner can be continuously enlarged or reduced; the eight-claw mechanism respectively rotates with the driving turntable 11 and the driven turntable 17 while contracting in the radial direction, power is realized by meshing of the toothed chains, power transmission is performed at corresponding transmission ratio according to different working condition requirements, and output of different rotating speeds, torques and powers is realized.

It is to be understood that the utility model is not limited in its application to the details of construction and the arrangement of components set forth herein. The utility model is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications fall within the scope of the present invention. It will be understood that the utility model disclosed and defined herein extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. The embodiments described herein explain the best modes known for practicing the utility model and will enable others skilled in the art to utilize the utility model.

Claims (10)

1. An eight-claw mechanism applied to a CVT speed changing device is characterized by comprising eight-claw bodies, T-shaped sliding blocks, spring seats, positioning mandrels, return springs and screw plugs;

the eight-claw body is arranged in a plurality of ways, the front end and the rear end of the eight-claw body are arranged in a chute of the rotary table through T-shaped sliding blocks, the spring seat is fixedly connected with the T-shaped sliding blocks through screws, a positioning core shaft is radially arranged on the spring seat, a reset spring is sleeved on the positioning core shaft, and the plug screw is arranged on the rotary table and is positioned above the reset spring.

2. The eight-pawl mechanism for use in a CVT transmission as recited in claim 1, wherein the eight-pawl mechanism is provided in two sets, the discs being divided into a drive disc and a driven disc, one set of eight-pawl mechanism being mounted on the drive disc and the other set of eight-pawl mechanism being mounted on the driven disc.

3. The eight-claw mechanism according to claim 1, wherein the slide groove is a slide rail in which the eight-claw body is radially extended and contracted.

4. The eight-claw mechanism applied to the CVT speed changing device is characterized in that the bottom of the eight-claw body is of a bevel structure, and the top of the eight-claw body is provided with a transmission tooth shape.

5. The eight-claw mechanism of claim 4, wherein the ramp structure at the bottom of the eight-claw body contacts the surface of the cone shaft, and the cone shaft moves axially to push the eight-claw structure to move radially in a telescopic manner.

6. The eight-claw mechanism applied to the CVT speed changing device is characterized in that two groups of eight-claw mechanisms are connected through a chain to achieve power transmission.

7. The eight-claw mechanism applied to the CVT speed changing device is characterized in that the inner teeth of the chain are meshed with the outer teeth at the tops of the eight-claw bodies, meanwhile, the tension toothed chain realizes power transmission, the rotating radius formed by enveloping the chain can be continuously increased or decreased, and therefore the transmission ratio of the rotation of the driving turntable and the driven turntable is changed.

8. The eight-claw mechanism applied to the CVT speed changing device of claim 1 wherein the T-shaped slider is fixed to the eight-claw body by screws;

screw holes are formed in the eight-claw body in the radial direction and the axial direction, hole positions are also formed in corresponding positions on the T-shaped sliding block, and the eight-claw body is fixed with the screw holes after penetrating through the hole positions on the T-shaped sliding block through screws.

9. The eight-claw mechanism applied to the CVT speed changing device of claim 8, wherein the T-shaped slider is divided into a first T-shaped slider and a second T-shaped slider, the first T-shaped slider is disposed at the front end of the eight-claw body, and the second T-shaped slider is disposed at the rear end of the eight-claw body.

10. The eight-claw mechanism applied to the CVT speed changing device of claim 9 wherein the T-shaped sliding block is T-shaped in cross section, a plurality of screw holes are formed in the T-shaped sliding block, a limiting block is arranged on one side of the T-shaped sliding block, which is in contact with the eight-claw body, the lower surface of the limiting block is in contact with the top of the eight-claw body, and the limiting block is provided with the screw holes.

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