Composite torsion damper and vehicle

Abstract

The invention discloses a composite torsion damper and a vehicle, the composite torsion damper comprises a driving part, a driven part and a power transmission part, the driven part is provided with a hydraulic buffer part and an elastic buffer part, the driving part is provided with a first buffer matching part and a second buffer matching part, and when the driving part and the driven part rotate relatively, the first buffer matching part and the second buffer matching part rotate relatively. The hydraulic buffering piece abuts against the first buffering matching piece so as to provide first buffering acting force to act on the driven piece. The elastic buffering piece abuts against the second buffering matching piece so as to provide first buffering acting force to act on the driven piece. Compared with the prior art, the hydraulic buffering piece can abut against the first buffering matching piece to provide the first buffering acting force, the first buffering acting force can effectively attenuate medium-low frequency band vibration energy, and the elastic buffering piece can abut against the second buffering matching piece to provide the second buffering acting force; the second buffering acting force can effectively attenuate high-frequency-band vibration energy.

Description

Technical Field

[0001] The present invention relates to the technical field of torsional dampers, in particular to a composite torsional damper and a vehicle. Background Art

[0002] With the iterative update of automobiles and the improvement of people's demand for a better life, the vibration noise and comfort of automobiles have become performance indicators that the automotive industry has been constantly pursuing. During the operation of an automobile, the torque output by the engine is usually non-constant and fluctuating, and the excitation torque generated by the engine penetrates the entire transmission system until the wheels. The torsional vibration caused not only exerts a periodic load on the system, but also accelerates the wear of components. Problems such as knocking, resonance, and noise generated also affect the riding experience of passengers in the vehicle. As an important part of the vehicle power transmission, the torsional vibration characteristics of the torque damper have a direct impact on the smoothness of vehicle driving and the riding experience of passengers.

[0003] In the prior art, spiral springs are mostly used for vibration damping. Although they are circumferentially evenly distributed, during the working process, the compression direction of the spiral spring is inconsistent with the force direction, which will cause the spiral spring to bend in the axial direction, resulting in problems such as uneven compression and abnormal noise; in addition, the vibration avoidance frequency of the spiral spring is low, and it cannot effectively attenuate the high-frequency vibration at high speeds. Summary of the Invention

[0004] The purpose of the present invention is to provide a composite torsional damper to solve the technical problems in the prior art, and it can effectively attenuate the vibration energy in the medium, low, and high frequency bands.

[0005] In a first aspect, the present invention provides a composite torsional damper, including a driving member, a driven member, and a power transmission member. An accommodation space is formed in the driving member, and the power transmission member and the driven member are both received in the accommodation space. Opposite ends of the power transmission member are respectively abutted against the driving member and the driven member to transmit the torque of the driving member to the driven member to drive the driven member to rotate around a preset axis: A hydraulic buffer and an elastic buffer are provided on the driven member, and a first buffer fitting and a second buffer fitting are provided on the driving member. When relative rotation occurs between the driving member and the driven member, among them: The hydraulic buffer abuts against the first buffer fitting to provide a first buffer force acting on the driven member; The elastic buffer abuts against the second buffer fitting to provide a second buffer force acting on the driven member.

[0006] A composite torsional damper as described above, wherein, preferably, the elastic buffer member includes a first portion and a second portion. Along the rotation direction of the driven member, the second portion is located on opposite sides of the first portion. A first hole is provided on the first portion, and the second buffer fitting extends into the first hole.

[0007] A composite torsional damper as described above, wherein, preferably, the projection of the first portion in the rotation direction of the driven member falls on the second portion, and the cross-section of the end of the second portion away from the first portion in the radial direction of the preset axis is an arc surface. A composite torsional damper as described above, wherein, preferably, a plurality of first grooves are provided on the driven member, and the plurality of first grooves are annularly spaced apart with the preset axis as the center. Each of the first grooves houses the elastic buffer member; A plurality of the second buffer fittings are provided, and the plurality of second buffer fittings are annularly spaced apart with the preset axis as the center. The plurality of second buffer fittings are provided in one-to-one correspondence with the plurality of elastic buffer members. A composite torsional damper as described above, wherein, preferably, the elastic buffer member is made of rubber. A composite torsional damper as described above, wherein, preferably, a plurality of fixed brackets are provided on the driven member, and the plurality of fixed brackets are annularly spaced apart with the preset axis as the center. Each of the fixed brackets is fixed with the hydraulic buffer member; A plurality of the first buffer fittings are provided, and the plurality of first buffer fittings are annularly spaced apart with the preset axis as the center. The plurality of first buffer fittings are provided in one-to-one correspondence with the plurality of hydraulic buffer members.

[0008] A composite torsional damper as described above, wherein, preferably, the cross-section of the first buffer fitting in the radial direction of the preset axis is in the shape of a cam.

[0009] A composite torsional damper as described above, wherein, preferably, a first convex column protrudes from the driven member, a second hole is provided through the first convex column, the axis of the second hole coincides with the preset axis, and a bearing member is embedded in the second hole.

[0010] A composite torsional damper as described above, wherein, preferably, a third hole is provided through the axis of the driven member, and an internal spline is integrally formed in the third hole.

[0011] In a second aspect, the present invention provides a vehicle, including the composite torsional damper described above.

[0012] Compared with the prior art, in the present invention, a hydraulic buffer and an elastic buffer are provided on the driven member, and a first buffer fitting and a second buffer fitting are provided on the driving member. The hydraulic buffer can abut against the first buffer fitting to provide a first buffer force, and the first buffer force can effectively attenuate the vibration energy in the medium and low frequency bands. The elastic buffer can abut against the second buffer fitting to provide a second buffer force, and the second buffer force can effectively attenuate the vibration energy in the high frequency band. Description of the Drawings

[0013] Figure 1 is a perspective view of the overall structure of the composite torsional damper provided by an embodiment of the present invention; Figure 2 is an exploded view of the overall structure of the composite torsional damper provided by an embodiment of the present invention; Figure 3 is a front view of the overall structure of the composite torsional damper provided by an embodiment of the present invention; Figure 4 is Figure 3 a sectional view taken along the line A-A of Figure 5 is a front view of the first disk body provided by an embodiment of the present invention; Figure 6 is a front view of the hidden part structure of the composite torsional damper provided by an embodiment of the present invention; Figure 7 is a partial structural schematic diagram of the driven member provided by an embodiment of the present invention; Figure 8 is a structural schematic diagram of the elastic buffer provided by an embodiment of the present invention.

[0014] Description of the Reference Numerals: 10 - driving member, 11 - first disk body, 12 - second disk body, 13 - first buffer fitting, 14 - second buffer fitting; 20 - driven member, 21 - hydraulic buffer, 22 - elastic buffer, 221 - first part, 222 - second part, 223 - first hole, 23 - first groove, 24 - fixed bracket, 25 - first convex post, 26 - second hole, 27 - third hole, 28 - internal spline; 30 - power transmission member, 31 - disc spring, 32 - separating ring; 40 - bearing member; 50 - engine crankshaft, 51 - second convex post; 100 - composite torsional damper. Detailed Embodiments

[0015] The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0016] As shown Figures 1 to 8 in the figure, an embodiment of the present invention provides a composite torsional damper 100, which includes a driving member 10, a driven member 20, and a power transmission member 30. The driving member 10 is connected to the engine crankshaft 50 and serves as a power input end. The driven member 20 is connected to the output shaft and is the power output end. An accommodation space is formed inside the driving member 10, and both the power transmission member 30 and the driven member 20 are received in the accommodation space. The opposite ends of the power transmission member 30 are respectively abutted against the driving member 10 and the driven member 20 to transmit the torque of the driving member 10 to the driven member 20, so as to drive the driven member 20 to rotate around a preset axis, thereby driving the output shaft to rotate.

[0017] In a feasible embodiment, referring to Figure 2 and Figure 4 the figure, the driving member 10 includes a first disk body 11 and a second disk body 12 which are connected. Along the extending direction of the preset axis, the first disk body 11 and the second disk body 12 are oppositely arranged, and the accommodation space is formed between the first disk body 11 and the second disk body 12. The first disk body 11 is connected to the engine crankshaft 50 by bolts, and the rotation of the engine crankshaft 50 can drive the first disk body 11 and the second disk body 12 to rotate synchronously.

[0018] The power transmission member 30 includes a disc spring 31 and a separator ring 32 which are stacked along the preset axis direction. The disc spring 31 is closer to the second disk body 12 than the separator ring 32. The disc spring 31 is in a disc shape, thicker in the middle and thinner at the edge. The disc spring 31 will undergo elastic deformation under the action of axial pressure to provide a large elastic pressure. The separator ring 32 is located between the disc spring 31 and the driven member 20, and the opposite sides of the separator ring 32 are respectively abutted against the disc spring 31 and the driven member 20, playing a role of buffering and transmitting pressure.

[0019] When the first disk body 11 and the second disk body 12 are fixed, the disc spring 31 undergoes elastic deformation in the axial direction. The elastic pressure of the disc spring 31 directly acts on the separator ring 32, and the separator ring 32 transmits the elastic pressure of the disc spring 31 to the driven member 20, thereby pressing the driven member 20 tightly to provide the normal pressure of the frictional torque between the driven member 20 and the first disk body 11. When the first disk body 11 rotates, it drives the driven member 20 to rotate through the frictional torque between them, thereby outputting torque.

[0020] When a torque impact occurs on the first disk body 11, the driving member 10 and the driven member 20 rotate relatively. To attenuate the impact energy and achieve the effect of smooth torque transmission, in the embodiment provided by the present invention, referring to Figure 2 and Figure 4As shown, a hydraulic buffer 21 and an elastic buffer 22 are provided on the follower 20, and a first buffer fitting 13 and a second buffer fitting 14 are provided on the driver 10. When relative rotation occurs between the driver 10 and the follower 20, the following applies: Referring to Figure 6 As shown, the hydraulic buffer 21 abuts against the first buffer fitting 13 to provide a first buffer force acting on the follower 20. The first buffer force can attenuate the vibration energy in the medium and low frequency bands. The structure of the hydraulic buffer 21 can refer to the hydraulic cylinder structure in the prior art. A plurality of groups of damping holes with different sizes are provided in the hydraulic cylinder, and a viscous fluid is filled inside. The viscous fluid flows through the damping holes to provide damping.

[0021] When relative rotation occurs between the driver 10 and the follower 20, the hydraulic buffer 21 abuts against the first buffer fitting 13. The viscous fluid in the hydraulic buffer 21 flows through the damping holes to generate a damping force, and at the same time, the internal spring provides stiffness. Thus, it can quickly respond and provide a first buffer force. Through a plurality of groups of damping holes with different sizes, multi-stage buffer vibration reduction can be achieved, and the attenuation effect on the vibration energy in the medium and low frequency bands is obvious.

[0022] The elastic buffer 22 abuts against the second buffer fitting 14. The elastic buffer 22 is made of an elastic material to provide a second buffer force acting on the follower 20. The second buffer force can effectively attenuate the vibration energy in the high frequency band and cover a relatively large vibration frequency range.

[0023] When relative rotation occurs between the driver 10 and the follower 20, the elastic buffer 22 abuts against the second buffer fitting 14. The elastic buffer 22 provides a second buffer force through its own elastic deformation to effectively attenuate the vibration energy in the high frequency band.

[0024] Through the synergistic effect of the hydraulic buffer 21 and the elastic buffer 22, the composite torsional damper 100 can effectively attenuate the vibration energy in different frequency bands. The hydraulic buffer 21 attenuates the vibration energy in the medium and low frequency bands and provides functions of quick response and multi-stage buffer vibration reduction. The elastic buffer 22 attenuates the vibration energy in the high frequency band and covers a relatively large vibration frequency range. This dual buffer mechanism enables the composite torsional damper 100 to more comprehensively protect the transmission system when dealing with torque shocks, reduce the influence of vibration and shock on the transmission system, and improve the stability and reliability of the transmission system.

[0025] In a feasible implementation, the elastic buffer 22 is made of rubber. The elastic buffer 22 replaces the function of the helical spring in the prior art. The elastic buffer 22 made of rubber can effectively attenuate vibration energy through its own elastic deformation. Since the elastic modulus of rubber is relatively low, it can provide a large deformation under high-frequency vibration, thereby absorbing more vibration energy. As the degree of extrusion increases, the elastic resistance of the elastic buffer 22 also increases, and it can automatically adjust the buffer force according to the magnitude of the torque impact, further improving the buffer effect.

[0026] When relative rotation occurs between the driving member 10 and the driven member 20, the extending direction of the second buffer acting force provided by the elastic buffer 22 to the driven member 20 is parallel to the rotation direction of the driven member 20, effectively avoiding the technical problems such as axial bending caused by the inconsistent force direction and compression direction of the helical spring in the prior art, resulting in uneven compression and abnormal noise. It ensures that the elastic buffer 22 can be evenly compressed and restored during operation, improving the stability and reliability of the composite torsional damper 100.

[0027] In the embodiment provided by the present invention, with reference to Figure 6 and Figure 8 as shown, the elastic buffer 22 includes an integrally formed first part 221 and a second part 222. Along the rotation direction of the driven member 20, the second part 222 is located on opposite sides of the first part 221. A first hole 223 is provided on the first part 221, and the second buffer fitting 14 extends into the first hole 223.

[0028] In the normal state, the second buffer fitting 14 is located in the first hole 223, and the elastic buffer 22 maintains a natural stretched state without elastic deformation. When relative rotation occurs between the driving member 10 and the driven member 20, the second buffer fitting 14 moves towards the second part 222 on one side, thereby squeezing the elastic buffer 22. The elastic buffer 22 undergoes elastic deformation, absorbs vibration energy and accumulates elastic restoring force. This elastic restoring force is the second buffer acting force. While providing elastic buffering, the elastic buffer 22 also plays a role in vibration damping. When the torque impact received by the driving member 10 disappears or weakens, the elastic restoring force of the elastic buffer 22 is released, enabling the driving member 10 and the driven member 20 to return to the initial position and rotate synchronously.

[0029] Preferably, with reference to Figure 2 and Figure 4As shown, the second buffer fitting 14 adopts a rivet structure. The first disk body 11 and the second disk body 12 are fixedly connected through the rivet structure. The first hole 223 is a circular through-hole. Through-holes are provided at the positions of the first disk body 11 and the second disk body 12 corresponding to the first hole 223. The second buffer fitting 14 passes through the through-holes and the first hole 223 in sequence and is fixed. While fixing the first disk body 11 and the second disk body 12, the second buffer fitting 14 is also assembled and fixed with the elastic buffer 22.

[0030] In a feasible implementation manner, referring to Figure 8 As shown, the cross-section of the second buffer fitting 14 is a cashew-like structure, with a narrower middle part and wider ends. The projection of the first part 221 in the rotation direction of the driven member 20 falls on the second part 222. The cross-section of the end of the second part 222 far from the first part 221 along the radial direction of the preset axis is an arc surface, so that the second buffer fitting 14 can provide a uniform pressure distribution when contacting the elastic buffer 22.

[0031] Preferably, the first part 221 is an arc-shaped cylinder, and the center of the arc-shaped cylinder falls on the preset axis. The first part 221 has a uniform cross-sectional shape in the rotation direction of the driven member 20, which is convenient for cooperation with the second buffer fitting 14. The second part 222 is a hemispherical body. When the second buffer fitting 14 moves to both sides of the elastic buffer 22, the spherical parts on both sides can provide uniform pressure in all directions, and the more it is compressed, the greater the elastic resistance, effectively avoiding problems such as uneven compression of the spiral spring.

[0032] Referring to Figure 2 and Figure 6 As shown, a plurality of first grooves 23 are provided on the driven member 20. The plurality of first grooves 23 are annularly spaced with the preset axis as the center. The inner contour surface of the first groove 23 is adapted to the outer contour surface of the elastic buffer 22. Each first groove 23 houses an elastic buffer 22. The first groove 23 provides an installation position for the elastic buffer 22, and the elastic buffer 22 is embedded in the first groove 23 and limited, ensuring the uniform distribution of the elastic buffer 22 on the driven member 20, so that the driven member 20 can be effectively buffered and vibration-damped in all directions. In a feasible implementation manner, the driven member 20 is a disk structure, and six first grooves 23 are provided. The six first grooves 23 are annularly spaced on the disk surface of the driven member 20 with the preset axis as the center.

[0033] Corresponding to the number and distribution of the first slots 23, the second buffer fitting 14 is provided with a plurality of them. A number of second buffer fittings 14 are arranged at annular intervals with a preset axis as the center. A number of second buffer fittings 14 are arranged in one-to-one correspondence with a number of elastic buffer components. Each elastic buffer member 22 has a corresponding second buffer fitting 14, making the transmission of the second buffer force more uniform and efficient, and avoiding the problems of insufficient local buffering or excessive buffering.

[0034] In the normal state, each second buffer fitting 14 is located in the first hole 223 of the corresponding elastic buffer member 22, and the elastic buffer member 22 maintains a natural extended state. When the driving member 10 is subjected to a torque impact, relative rotation occurs between the driving member 10 and the driven member 20. The second buffer fitting 14 moves towards the second part 222 on one side, squeezing the elastic buffer member 22. Since the elastic buffer member 22 and the second buffer fitting 14 are evenly distributed in the circumferential direction, it ensures that the driven member 20 can obtain a uniform buffer force in all directions. Each elastic buffer member 22 undergoes elastic deformation when being squeezed, absorbs vibration energy and stores elastic restoring force. When the torque impact on the driving member 10 disappears or weakens, the elastic restoring force of the elastic buffer member 22 is released, causing the driving member 10 and the driven member 20 to return to the initial position and resume synchronous rotation.

[0035] In the embodiment provided by the present invention, referring to Figure 2 and Figure 7 As shown, a number of fixed brackets 24 are provided on the driven member 20. A number of fixed brackets 24 are arranged at annular intervals with a preset axis as the center. Each fixed bracket 24 is fixedly provided with a hydraulic buffer member 21, providing an installation position for the hydraulic buffer member 21, ensuring the uniform distribution of the hydraulic buffer member 21 on the driven member 20, and enabling the driven member 20 to obtain effective buffering and vibration reduction in all directions. In a feasible implementation manner, the driven member 20 is of a disk structure, and the fixed brackets 24 are arranged on the outer circumferential surface of the disk structure. There are six fixed brackets 24, and the six fixed brackets 24 are arranged at annular intervals on the outer circumferential surface of the driven member 20 with a preset axis as the center. When the hydraulic buffer member 21 is a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixed on the fixed bracket 24, and the end of the piston rod of the hydraulic cylinder extends towards the direction of the first buffer fitting 13.

[0036] A plurality of first buffer fittings 13 are provided. A number of first buffer fittings 13 are arranged at annular intervals with a preset axis as the center. A number of first buffer fittings 13 are arranged in one-to-one correspondence with a number of hydraulic buffer components, ensuring that each hydraulic buffer member 21 has a corresponding first buffer fitting 13, making the transmission of the first buffer force more uniform and efficient.

[0037] Under normal conditions, each first buffer fitting 13 is located at the fitting position of the corresponding hydraulic buffer 21, and the hydraulic buffer 21 remains in its natural state. When the driving member 10 is subjected to a torque impact and relative rotation occurs between the driving member 10 and the driven member 20, the first buffer fitting 13 contacts the hydraulic buffer 21, and the hydraulic buffer 21 starts to operate. The hydraulic buffer 21 provides a damping force through the flow of internal viscous fluid in the damping holes, and at the same time, the internal spring provides stiffness, which can quickly respond and provide a first buffer force, effectively attenuating the vibration energy in the medium and low frequency bands. Since the hydraulic buffer 21 and the first buffer fitting 13 are evenly distributed in the circumferential direction, it ensures that the driven member 20 can obtain a uniform buffer force in all directions, avoiding problems of local insufficient buffering or excessive buffering. When the torque impact on the driving member 10 disappears or weakens, the internal spring of the hydraulic buffer 21 returns to its original state, causing the driving member 10 and the driven member 20 to return to the initial position and resume synchronous rotation.

[0038] When the hydraulic buffer 21 is a hydraulic cylinder, referring to Figure 5 as shown, preferably, the cross-section of the first buffer fitting 13 in the radial direction along the preset axis is in the shape of a cam. The outer circumferential surface of the cam shape of the first buffer fitting 13 of the piston rod of the hydraulic buffer 21 abuts against each other to form a cam tappet mechanism, which can convert the circumferential motion of the first disc 11 into the linear motion of the piston rod of the hydraulic cylinder, thereby realizing an efficient buffering and vibration reduction function.

[0039] To prevent the offset of the driven member 20 in the radial direction of the preset axis and avoid torsional damper NVH problems and abnormal wear problems of components, in the embodiments provided by the present invention, referring to Figure 4 and Figure 7 as shown, a first convex column 25 is protruded on the driven member 20, a second hole 26 is penetrated through the first convex column 25, the first convex column 25 is located in the middle of the driven member 20, the axis of the second hole 26 coincides with the preset axis, and a bearing member 40 is embedded in the second hole 26. When the driving member 10 and the driven member 20 rotate relative to each other, the driven member 20 can stably rotate around the preset axis and be supported on the bearing member 40.

[0040] The bearing member 40 is preferably a needle bearing. Referring to Figure 4 as shown, when the engine crankshaft 50 is fixed on the first disc 11, a second convex column 51 is protruded on the engine crankshaft 50, and the second convex column 51 extends into the needle bearing. The inner ring of the bearing member 40 cooperates with the second convex column 51 on the engine crankshaft 50, and the outer ring of the bearing member 40 cooperates with the first convex column 25 on the driven member 20, thereby forming a radial limit for the driven member 20. When the torsional damper is installed with external parts, the driven member 20 is prevented from generating a radial offset relative to the driving member 10, avoiding torsional damper NVH problems and abnormal wear problems caused by the offset.

[0041] In the embodiments provided by the present invention, with reference to Figure 4 and Figure 7 As shown, a third hole 27 is provided through the axis of the follower 20, and an internal spline 28 is integrally formed in the third hole 27. The internal spline 28 is used to form a spline fit with the external spline of the rotating shaft. During operation, the engine crankshaft 50 transmits torque to the follower 20 through the driving member 10. The follower 20 transmits the torque to the output shaft through the fit between the internal spline 28 and the external spline on the output shaft. The integral formation of the internal spline 28 in the third hole 27 can reduce the number of structures, simplify the installation steps, reduce the assembly error, and improve the installation efficiency.

[0042] In a second aspect, the present invention provides a vehicle including the aforementioned composite torsional damper 100. The composite torsional damper 100 can effectively reduce the torsional vibration of the engine crankshaft 50, effectively attenuate the vibration energy in the medium, low, and high frequency bands, improve the stability and reliability of the transmission system, and at the same time reduce the influence of vibration and noise on the vehicle comfort, thereby improving the overall performance of the vehicle.

[0043] The structure, features, and function effects of the present invention have been described in detail based on the embodiments shown in the drawings. The above are only the preferred embodiments of the present invention, but the present invention is not limited to the scope defined by the drawings. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified into equivalent changes, should still be within the protection scope of the present invention as long as they do not exceed the spirit covered by the description and the drawings.

Claims

1. A composite torsional damper, comprising a driving member, a driven member, and a power transmission member. An accommodation space is formed in the driving member. The power transmission member and the driven member are both received in the accommodation space. Opposite ends of the power transmission member are respectively abutted against the driving member and the driven member to transmit the torque of the driving member to the driven member, so as to drive the driven member to rotate about a preset axis. It is characterized in that: The driven member is provided with a hydraulic buffer and an elastic buffer. The driving member is provided with a first buffer fitting and a second buffer fitting. When relative rotation occurs between the driving member and the driven member, among them: The hydraulic buffer abuts against the first buffer fitting to provide a first buffer force acting on the driven member; The elastic buffer abuts against the second buffer fitting to provide a second buffer force acting on the driven member.

2. The composite torsional damper according to claim 1, characterized in that The elastic buffer includes a first part and a second part. Along the rotation direction of the driven member, the second part is located on opposite sides of the first part. A first hole is provided in the first part, and the second buffer fitting extends into the first hole.

3. The composite torsional damper according to claim 2, characterized in that, The projection of the first part in the rotation direction of the driven member falls on the second part, and the cross-section of the end of the second part away from the first part in the radial direction of the preset axis is an arc surface.

4. The composite torsional damper according to claim 1, characterized in that, A plurality of first grooves are provided on the driven member. The plurality of first grooves are annularly and spaced apart around the preset axis, and each of the first grooves houses the elastic buffer; A plurality of the second buffer fittings are provided. The plurality of second buffer fittings are annularly and spaced apart around the preset axis, and the plurality of second buffer fittings are arranged in one-to-one correspondence with the plurality of elastic buffers.

5. The composite torsional damper according to claim 1, characterized in that, The elastic buffer is made of rubber material.

6. The composite torsional damper according to claim 1, characterized in that, A plurality of fixing brackets are provided on the driven member. The plurality of fixing brackets are annularly and spaced apart around the preset axis, and the hydraulic buffer is fixed on each of the fixing brackets; A plurality of the first buffer fittings are provided. The plurality of first buffer fittings are annularly and spaced apart around the preset axis, and the plurality of first buffer fittings are arranged in one-to-one correspondence with the plurality of hydraulic buffers.

7. The composite torsional damper according to claim 1, characterized in that, The cross-section of the first buffer fitting in the radial direction of the preset axis is in the shape of a cam.

8. The composite torsional damper according to claim 1, characterized in that, A first convex post protrudes from the driven member. A second hole is provided through the first convex post, and the axis of the second hole coincides with the preset axis. A bearing member is embedded in the second hole.

9. The composite torsional damper according to claim 1, characterized in that, A third hole is provided through the axis of the driven member, and an internal spline is integrally formed in the third hole.

10. A vehicle, characterized in that, It includes the composite torsional damper according to any one of claims 1-9.

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