Torsional damper, transmission assembly and vehicle

Abstract

The utility model discloses a torsion shock absorber, a transmission assembly and a vehicle, the torsion shock absorber comprises a power input piece and a disc hub which are coaxially arranged, the power input piece is provided with a return matching part, and a return matching surface is formed on the return matching part; a return part is arranged on the disc hub, and a return surface is formed on the return part; when the power input piece deflects in the radial direction of the preset axis, the return matching face abuts against the return face. Compared with the prior art, due to the fact that the return matching part is arranged on the power input piece and the return part is arranged on the disc hub, when the power input piece deviates in the radial direction, the return matching part on the power input piece abuts against the return part on the disc hub, the power input piece is returned, and certain concentricity is kept between the power input piece and the disc hub. Therefore, the NVH abnormal sound of the vehicle is reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle transmission technology, and in particular to a torsional shock absorber, transmission assembly, and vehicle. Background Technology

[0002] In the design of existing vehicles, the torsional damper and torsional limiter are designed with a large gap to avoid interference. When the torque limiter slips and there is centrifugal force, the torsional damper is prone to eccentricity relative to the torsional limiter, resulting in a large overall imbalance and causing abnormal NVH noise in the whole vehicle. Utility Model Content

[0003] The purpose of this invention is to provide a torsional damper, transmission assembly, and vehicle to solve the technical problems in the prior art, which can restore the torsional damper in an eccentric state to its original position.

[0004] In a first aspect, this utility model provides a torsional damper capable of rotating about a preset axis. The torsional damper includes a power input component and a hub arranged coaxially, wherein:

[0005] The power input component is provided with a return fitting part, and a return fitting surface is formed on the return fitting part;

[0006] The hub is provided with a return part, and a return surface is formed on the return part;

[0007] in:

[0008] When the power input component deflects radially along the preset axis, the return mating surface abuts against the return surface.

[0009] In the torsional damper described above, preferably, the return portion is formed on the side end face of the hub, the return mating surface is formed on the side of the return portion opposite to the side end face, and the extending direction of the return mating surface is parallel to the tangential direction of the side end face of the hub.

[0010] In the torsional damper described above, preferably, the return mating surface and the side end face of the hub are connected by an arc-shaped connecting surface.

[0011] In the torsional damper described above, preferably, a protrusion is provided on the side end face of the hub, and the return fitting portion is disposed adjacent to the protrusion.

[0012] In the torsional damper described above, preferably, multiple return parts and multiple return mating parts are provided, and the multiple return parts are equally spaced and arranged in a ring on the side end face of the disc hub, with each of the multiple return parts corresponding to the multiple return mating parts.

[0013] The torsional damper as claimed in the above, wherein preferably, the extension direction of the return fitting surface is parallel to the tangential direction of the side end surface of the disc hub.

[0014] The torsional damper as claimed in the above, wherein preferably, the power input member comprises a friction plate, a connecting pin, a first damping disc, a second damping disc, a first damping sheet, a second damping sheet, and a damping spring, wherein:

[0015] The first damping disc is fixed on the friction plate, the first damping disc and the second damping disc are oppositely arranged, the second damping disc is connected with the first damping disc through the connecting pin, and the return fitting part is arranged on the connecting pin;

[0016] The first damping sheet is fixed on the first damping disc, the second damping sheet is fixed on the second damping disc, and the opposite sides of the disc hub are respectively attached to the first damping sheet and the second damping sheet;

[0017] The damping spring is installed in a spring mounting part defined by the first damping disc, the disc hub and the second damping disc.

[0018] In a second aspect, the utility model provides a transmission assembly, including torsion limiter and preceding torsional damper, the torsional damper includes friction plate, the torsion limiter includes mass ring, diaphragm spring and gland, the gland is connected with the mass ring, the diaphragm spring, the friction plate and the mass ring are in turn laminated pressure equipment.

[0019] In a third aspect, the utility model provides a vehicle, including preceding transmission assembly.

[0020] Compared with the prior art, the utility model discloses a return fitting part arranged on a power input member and a return part arranged on a disc hub, when the power input member is radially offset, the return fitting part on the power input member abuts against the return part on the disc hub, the power input member is returned to normal, and the disc hub maintains a certain concentricity, thereby reducing the NVH abnormal sound of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic diagram of torsional damper provided by the utility model embodiment;

[0022] Figure 2 It is the explosion structure schematic diagram of torsional damper provided by the utility model embodiment;

[0023] Figure 3 It is the perspective view of disc hub provided by the utility model embodiment;

[0024] Figure 4 is a perspective view of the connecting pin provided by the embodiment of the utility model;

[0025] Figure 5 is a structural schematic view of the power input piece in the eccentric state provided by the embodiment of the utility model;

[0026] Figure 6 is a structural schematic view of the power input piece in the eccentric state provided by the embodiment of the utility model;

[0027] Figure 7 is a structural schematic view of the transmission assembly provided by the embodiment of the utility model;

[0028] Figure 8 is Figure 7 A-A direction section view of it.

[0029] Mark explanation:

[0030] 1 - friction plate, 2 - connecting pin, 21 - return fit part, 211 - return fit surface, 3 - hub, 31 - return part, 311 - return surface, 312 - arc connecting surface, 32 - protrusion, 4 - first damping disc, 5 - second damping disc, 6 - first damping sheet, 7 - second damping sheet, 8 - damping spring, 9 - spring mounting part, 10 - mass ring, 11 - diaphragm spring, 12 - gland. Specific implementation

[0031] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be explained as the limitation of the utility model.

[0032] As Figures 1 to 8 shown, the embodiment of the utility model provides a torsional damper, the torsional damper is applied to transmission assembly, the transmission assembly is used to transmit torque and prevent transmission overload, the transmission assembly further includes a torsional limiter, the torsional limiter is connected to the crankshaft of the vehicle engine and is driven by the crankshaft to transmit the torque around the preset axis, and the torsional damper is located inside the torsional limiter as a whole and outputs the torque transmitted by the torsional limiter to the output shaft.

[0033] In the embodiment provided by the utility model, the torsional damper rotates around the preset axis, including the power input piece and the hub 3 arranged coaxially, the power input piece receives the torque transmitted from the torsional limiter and transmits to the hub 3, and the hub 3 continues to output the torque to the output shaft.

[0034] The power input member and the torque limiter are connected by friction to transmit torque and limit the maximum torque that can be transmitted. If the torque exceeds the preset torque at the friction connection, the power input member will slip, and the power input member can move radially to deviate from the preset axis, resulting in excessive overall imbalance and causing abnormal noise of the vehicle NVH.

[0035] To overcome the technical problem of abnormal noise of the vehicle NVH caused by eccentricity of the power input member, referring to Figures 3 to 6 , in a feasible implementation, a return fitting part 21 is arranged on the power input member, and a return fitting surface 211 is formed on the return fitting part 21; a return part 31 is arranged on the disc hub 3, and a return surface 311 is formed on the return part 31. When the power input member is deflected in the radial direction of the preset axis, the return fitting surface 211 abuts against the return surface 311, and the return surface 311 provides a force value to the return fitting surface 211 towards the center of the circle, so as to correct the power input member and ensure a certain concentricity with the disc hub 3, thereby reducing the abnormal noise of the vehicle NVH.

[0036] In a feasible implementation, referring to Figure 1 and Figure 2 , the power input member includes a friction plate 1, a connecting pin 2, a first damping disc 4, a second damping disc 5, a first damping sheet 6, a second damping sheet 7, and a damping spring 8, wherein:

[0037] The first damping disc 4 is fixed on the friction plate 1, the first damping disc 4 and the second damping disc 5 are oppositely arranged, the second damping disc 5 is connected with the first damping disc 4 through the connecting pin 2, and the return fitting part 21 is arranged on the connecting pin 2. The friction plate 1 receives the torque transmitted from the torque limiter through friction connection. If the torque exceeds the preset torque at the friction connection, the torsional damper slips, thereby realizing the torque limiting function and protecting the downstream components from overload and damage. The connecting pin 2 not only connects the two damping discs, but also bears the return fitting part 21. The return fitting part 21 cooperates with the return part 31 on the disc hub 3 to realize the correction function of the power input member and ensure the concentricity of the power input member and the disc hub 3.

[0038] The first damping sheet 6 is fixed on the first damping disc 4, the second damping sheet 7 is fixed on the second damping disc 5, and the opposite sides of the disc hub 3 are respectively attached to the first damping sheet 6 and the second damping sheet 7. Through the friction between the damping sheets and the disc hub 3, the vibration energy is further absorbed, and the abnormal noise is reduced.

[0039] The damping spring 8 is installed in a spring mounting portion 9 defined by the first damping disc 4, the disc hub 3 and the second damping disc 5. The damping spring 8 is a coil spring, one end of which is acted on by the first damping disc 4 and the second damping disc 5, and the other end of which is acted on by the disc hub 3, so as to transmit the torque from the first damping disc 4 and the second damping disc 5 to the disc hub 3. The damping spring 8 can absorb and reduce the fluctuation in the torque by compression and elongation.

[0040] With reference to Figure 3 As shown in the figure, the return portion 31 is formed on the side end face of the disc hub 3, and is protruded on the disc hub 3, preferably in an integral molding manner, to provide a reliable support basis for the return matching face 211 formed on the side away from the side end face of the return portion 31. The extension direction of the return matching face 211 is parallel to the tangential direction of the side end face of the disc hub 3, so that when the power input member is radially deflected, the return matching face 211 can form effective contact and force transmission with the return face 311. The direction of the contact force is perpendicular to the deflection direction, so that the power input member can be more efficiently pulled back to the center position.

[0041] Under normal circumstances, with reference to Figure 5 As shown in the figure, the power input member is in a concentric position with the disc hub 3, and the return portion 31 is dislocated with the return matching portion 21. When the power input member slips, the power input member moves radially along the preset axis, and the disc hub 3 rotates relative to the power input member until the return portion 31 starts to contact the return matching portion 21, with reference to Figure 6 As shown in the figure, until the return matching face 211 abuts against the return face 311, the return face 311 provides a force value to the return matching face 211 towards the center of the circle, so as to pull the power input member back to the center position, ensure that it maintains a high concentricity with the disc hub 3, and effectively reduce the vibration and abnormal sound caused by eccentricity, thereby significantly improving the NVH performance of the whole vehicle.

[0042] With reference to Figure 3 As shown in the figure, the return matching face 211 and the side end face of the disc hub 3 are connected through the arc-shaped connecting face 312. During the rotation of the disc hub 3, the return matching portion 21 first contacts the arc-shaped connecting face 312, and then the return matching face 211 abuts against the return face 311 through the guidance of the arc-shaped connecting face 312, so as to effectively reduce stress concentration and avoid hard collision between the return matching portion 21 and the return portion 31, and ensure that the return matching face 211 can smoothly transition to the return face 311, thereby reducing abnormal sound.

[0043] Further, with reference to Figures 3 to 6As shown, the side end face of the disc hub 3 is provided with a protrusion 32, and the return matching part 21 is arranged adjacent to the protrusion 32. The protrusion 32 can limit the rotation range of the disc hub 3 when the disc hub 3 and the power input part rotate relative to each other. Since the return matching surface 211 is arranged adjacent to the protrusion 32, the return matching part 21 first contacts the return part 31 during the rotation of the disc hub 3. When the protrusion 32 abuts against the return matching part 21, the disc hub 3 will no longer continue to rotate. At this time, the return matching surface 211 of the disc hub 3 also abuts against the return surface 311, forming stable fitting, thereby ensuring that the power input part can quickly return to the normal position after deflection.

[0044] Referring to Figures 2 to 4 As shown, the return part 31 and the return matching part 21 are both provided with a plurality of parts. The plurality of return parts 31 are arranged in a ring shape at equal intervals on the side end face of the disc hub 3, and the plurality of return parts 31 and the plurality of return matching parts 21 correspond to each other. Therefore, the return mechanism between the disc hub 3 and the power input part is more uniformly distributed. No matter which direction the power input part deflects in, there is a corresponding return part 31 and return matching part 21 to cooperate, thereby ensuring that the disc hub 3 and the power input part always maintain good concentricity.

[0045] Preferably, the return part 31 and the return matching part 21 are both provided with four parts. Those skilled in the art can know that the number and distribution of the return part 31 and the return matching part 21 can be adjusted according to actual needs, which is not limited herein.

[0046] In the embodiments provided by the utility model, referring to Figures 4 to 6 As shown, the extension direction of the return matching surface 211 is parallel to the tangent direction of the side end face of the disc hub 3. When the return surface 311 and the return matching surface 211 contact, the contact force therebetween can directly act on the eccentric direction of the power input part, thereby ensuring that the return force direction is consistent with the eccentric direction, improving the return efficiency, and more efficiently pulling the power input part back to the center position. Meanwhile, the parallel arrangement of the return matching surface 211 and the return surface 311 can better fit when they contact, thereby reducing stress concentration caused by uneven contact. The risk of structural damage caused by excessive local stress is reduced.

[0047] Based on the torsional damper provided in the above embodiments, referring to Figure 7 and Figure 8 The utility model also provides a transmission assembly, which comprises a torsion limiter and the aforementioned torsional damper. The torsional damper comprises a friction plate 1. The torsion limiter comprises a mass ring 10, a diaphragm spring 11, and a gland 12. The gland 12 is connected with the mass ring 10. The diaphragm spring 11, the friction plate 1, and the mass ring 10 are sequentially stacked and pressed.

[0048] The power of the crankshaft of the engine is transmitted to the output shaft in turn via the mass ring 10, the gland 12, the diaphragm spring 11, the friction plate 1, the first damping disc 4, the damping spring 8 and the disc hub 3, in the case that excessive torque is applied between the crankshaft and the output shaft, in the torque limiter, the friction plate 1 slips with the mass ring 10, the transmission between the crankshaft and the output shaft is cut off, i.e. relative rotation is allowed, and damage to the engine and the transmission assembly is avoided. The fluctuation part in the power output by the transmission assembly is absorbed by the damping spring, so that the power transmitted to the gearbox of the automobile becomes smooth, and the damping function is realized.

[0049] Based on the transmission assembly provided in the above embodiment, the utility model also provides a vehicle, which comprises the transmission assembly, the transmission assembly is provided with the return matching part 21 on the power input part and the return part 31 on the disc hub 3, when the power input part is radially offset, the return matching part 21 on the power input part abuts against the return part 31 on the disc hub 3, the power input part is returned to normal, and the disc hub 3 maintains a certain concentricity, so that the NVH abnormal sound of the vehicle is reduced.

[0050] The above embodiment shown in the drawings details the structure, features and effect of the utility model, and the above description is only the preferred embodiment of the utility model, but the utility model is not limited to the drawings, any change or modification according to the concept of the utility model, or the equivalent embodiment of equivalent change, as long as it is within the protection scope of the utility model.

Claims

1. A torsional vibration damper rotatable about a predetermined axis, the torsional vibration damper comprising a power input member and a hub coaxially arranged, characterized in that: a return fitting portion is arranged on the power input member, and a return fitting surface is formed on the return fitting portion; a return portion is arranged on the hub, and a return surface is formed on the return portion; wherein: when the power input member is deflected in a radial direction of the predetermined axis, the return fitting surface abuts against the return surface. The return portion is formed on a side end surface of the hub, the return fitting surface is formed on a side of the return portion away from the side end surface, and an extension direction of the return fitting surface is parallel to a tangent direction of the side end surface of the hub. The return fitting surface and the side end surface of the hub are connected by an arc-shaped connecting surface. A protrusion is arranged on the side end surface of the hub, and the return fitting portion is arranged adjacent to the protrusion. The return portion and the return fitting portion are each arranged in a plurality of numbers, the plurality of return portions are arranged in a ring on the side end surface of the hub at equal intervals, and the plurality of return portions and the plurality of return fitting portions are in one-to-one correspondence.

2. The torsional vibration damper according to claim 1, characterized in that: The extension direction of the return fitting surface is parallel to the tangent direction of the side end surface of the hub.

3. The torsional vibration damper according to claim 2, characterized in that: The power input member comprises a friction plate, a connecting pin, a first damping disc, a second damping disc, a first damping sheet, a second damping sheet, and a damping spring, wherein: the first damping disc is fixed on the friction plate, the first damping disc and the second damping disc are arranged oppositely, the second damping disc is connected to the first damping disc through the connecting pin, and the return fitting portion is arranged on the connecting pin; the first damping sheet is fixed on the first damping disc, the second damping sheet is fixed on the second damping disc, and opposite sides of the hub are respectively attached to the first damping sheet and the second damping sheet; and the damping spring is installed in a spring installation portion defined by the first damping disc, the hub, and the second damping disc.

4. The torsional vibration damper according to claim 1, characterized in that: The torsional vibration damper comprises a torsional limiter and any one of claims 1-7, the torsional vibration damper comprises a friction plate, the torsional limiter comprises a mass ring, a diaphragm spring, and a gland, the gland is connected to the mass ring, and the diaphragm spring, the friction plate, and the mass ring are sequentially and tightly arranged.

5. The torsional vibration damper of claim 1, characterized by: The transmission assembly comprises the torsional vibration damper of claim 8.

6. The torsional vibration damper according to claim 1, characterized in that: ​ 7. The torsional vibration damper according to claim 1, characterized in that: ​ ​ ​ ​ 8. A transmission assembly characterized by, ​ 9. A vehicle characterized by comprising: ​

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