Torque transmission mechanism

Abstract

The utility model relates to a torque transmission mechanism. The torque transmitting mechanism is rotatable about a central axis to transmit torque between the first rotating member and the second rotating member. The torque transmission mechanism comprises an outer ring part, a center part and a plurality of spoke springs, the outer ring part coaxially surrounds the radial outer side of the center part, the outer ring part is used for being in transmission connection with a first rotating component, and the center part is used for being in transmission connection with a second rotating component. The spoke springs are connected between the outer ring part and the center part in the radial direction and distributed at intervals in the circumferential direction, the spoke springs can elastically deform to allow the outer ring part to rotate relative to the center part, and therefore vibration of torque transmitted between the outer ring part and the center part is buffered. The torque transmission mechanism has a damping effect.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission. Specifically, the utility model relates to a torque transmission mechanism with a vibration damping effect. Background Art

[0002] In traditional mechanical transmission structures, torque transmission between different rotating components is usually achieved through mutually engaged gear teeth or splines. In order to assemble the gear teeth or splines on different components together, the mutually engaged gear teeth or splines usually have a clearance fit, and machining tolerances also cause the generation of clearances. Due to the existence of this clearance, when the rotation direction of these transmission structures changes or the transmitted torque approaches zero, the gear teeth or splines will collide or vibrate, resulting in noise. For example, in various motor vehicles, when the gear train in the transmission or differential changes the direction of transmitted torque or approaches zero, noise that can be perceived by the driver or passengers in the vehicle will be generated due to the above reasons, which greatly affects the driving experience of the driver and the riding experience of the passengers. Summary of the Utility Model

[0003] Therefore, the technical problem to be solved by the utility model is to provide a torque transmission mechanism with a vibration damping effect.

[0004] The above technical problem is solved by a torque transmission mechanism according to the utility model. The torque transmission mechanism can rotate around a central axis to transmit torque between a first rotating component and a second rotating component. The torque transmission mechanism includes an outer ring portion, a central portion, and a plurality of spoke springs. The outer ring portion coaxially surrounds the radial outside of the central portion. The outer ring portion is used for driving connection with the first rotating component. The central portion is used for driving connection with the second rotating component. The plurality of spoke springs are respectively connected between the outer ring portion and the central portion along the radial direction and are circumferentially spaced apart. The plurality of spoke springs can elastically deform to allow the outer ring portion to rotate relative to the central portion, thereby buffering the vibration of the torque transmitted between the outer ring portion and the central portion. Such a torque transmission mechanism can replace the traditional gear or spline mechanism to transmit torque, thereby effectively reducing torque vibration and knocking noise.

[0005] According to a preferred embodiment of the utility model, the outer ring portion, the central portion, and the plurality of spoke springs can extend in the same plane perpendicular to the central axis. This helps the elastic deformation of the spoke springs to occur in a controllable manner.

[0006] According to another preferred embodiment of the utility model, the torque transmission mechanism can include a plurality of layers stacked axially. By changing the number of layers, the torque capacity, deformation state, etc. of the torque transmission mechanism can be adjusted.

[0007] According to another preferred embodiment of the present utility model, the plurality of laminations can be fixed together by fasteners axially passing through the plurality of laminations. The fasteners can be provided on the outer ring portion and / or the central portion.

[0008] According to another preferred embodiment of the present utility model, the torque transmission mechanism can include external teeth or external splines located on the outer ring portion for driving connection with the first rotating member. Preferably, the external teeth or external splines can be integrally formed with the outer ring portion or fixedly attached to the outer ring portion. If the axial dimension (thickness) of the torque transmission mechanism is large enough, the external teeth or external splines can be directly formed on the edge of the outer ring portion; if the axial dimension of the torque transmission mechanism is small, the external teeth or external splines can be formed as independent components meeting the strength requirements and then attached to the outer ring portion.

[0009] According to another preferred embodiment of the present utility model, the torque transmission mechanism can include internal teeth or internal splines located on the central portion for driving connection with the second rotating member. Preferably, the internal teeth or internal splines can be integrally formed with the central portion or fixedly attached to the central portion. If the axial dimension (thickness) of the torque transmission mechanism is large enough, the internal teeth or internal splines can be directly formed on the edge of the outer ring portion; if the axial dimension of the torque transmission mechanism is small, the internal teeth or internal splines can be formed as independent components meeting the strength requirements and then attached to the outer ring portion.

[0010] According to another preferred embodiment of the present utility model, the plurality of spoke springs can be evenly distributed circumferentially. Thereby, it can be ensured that the load of the torque transmission mechanism is evenly distributed circumferentially.

[0011] According to another preferred embodiment of the present utility model, the plurality of spoke springs can have the same shape and size. Thereby, it can be ensured that the load of the torque transmission mechanism is evenly distributed circumferentially. Description of the Drawings

[0012] The present utility model will be further described below with reference to the accompanying drawings. The same reference numerals in the drawings represent elements with the same functions. Among them:

[0013] Figure 1 A front view showing a torque transmission mechanism according to an exemplary embodiment of the present utility model;

[0014] Figure 2 A schematic diagram showing the installation manner of the external teeth or external splines of a torque transmission mechanism according to another exemplary embodiment of the present utility model; and

[0015] Figure 3 A schematic diagram showing the installation manner of a torque transmission mechanism and a shaft according to an exemplary embodiment of the present utility model. Detailed Description of the Invention

[0016] The following will describe the specific implementation of the torque transmission mechanism according to the utility model in conjunction with the accompanying drawings. The following detailed description and drawings are used to exemplarily illustrate the principle of the utility model. The utility model is not limited to the preferred embodiments described, and the protection scope of the utility model is defined by the claims.

[0017] According to an embodiment of the utility model, a torque transmission mechanism with vibration reduction and buffering effects is provided. Figure 1 FIG. 2 shows a front view of a torque transmission mechanism according to an exemplary embodiment of the present utility model. Figure 1 As shown, the torque transmission mechanism is generally in the shape of a disk. The torque transmission mechanism can be drivingly connected with two different rotating components at the same time, and can rotate around a central axis O to transmit torque between the two rotating components.

[0018] like Figure 1 As shown, the torque transmission mechanism includes an outer ring portion 1, a center portion 2, and a plurality of spoke springs 3. The torque transmission mechanism has a central axis O substantially parallel to the axial direction. The center portion 2 is a plate-like component that is substantially annular or disc-shaped and formed around the center axis O. The outer ring portion 1 is also a plate-like component that is substantially annular and formed around the center axis O. The outer ring portion 1 coaxially surrounds the radially outer side of the center portion 2 and is spaced apart from the center portion 2 in the radial direction.

[0019] The torque transmission mechanism includes a plurality of spoke springs 3. Each spoke spring 3 extends between the outer ring portion 1 and the central portion 2 substantially in the radial direction (i.e., the extension direction passes through the central axis O), thereby connecting the outer ring portion 1 and the central portion 2 as a whole. These spoke springs 3 of the torque transmission mechanism are distributed at intervals in the circumferential direction around the central axis O. These spoke springs 3 of the torque transmission mechanism are made of elastic material (e.g., spring steel, such as C75s, etc.), so that they can be elastically deformed to a certain extent when subjected to external force or load. Due to the elastic deformation ability of the spoke spring 3, the outer ring portion 1 and the central portion 2 connected at both ends of the spoke spring 3 can rotate relative to each other around the central axis O within a certain range.

[0020] In the torque transmission mechanism, the outer ring portion 1 and the central portion 2 are used as two opposite torque transmission ends to be respectively connected to two different rotating parts, so that torque is input from one rotating part and output to the other rotating part. Here, the rotating part connected to the outer ring portion 1 is referred to as the first rotating part (not shown), and the other rotating part connected to the central portion 2 is referred to as the second rotating part (for example, Figure 3The drive shaft shown at 5). When this torque transmission mechanism is connected in series in a certain torque transmission path, torque is input from one of the outer ring portion 1 and the central portion 2, and then transmitted to the other of the outer ring portion 1 and the central portion 2 via a plurality of spoke springs 3, and finally output by the other of the outer ring portion 1 and the central portion 2. When the torque passes through the spoke spring 3, it can cause elastic deformation of the spoke spring 3, and this elastic deformation causes the outer ring portion 1 to rotate relative to the central portion 2 approximately around the central axis O. The degree of relative rotation between the outer ring portion 1 and the central portion 2 depends on the elasticity of the spoke spring 3 and the magnitude of the transmitted torque. Based on a principle similar to that of a traditional helical spring shock absorber, the elastically deformed spoke spring 3 can buffer the vibration in the torque passing through the torque transmission mechanism through elastic deformation. Similarly, the impact during the start or reversal of rotation and the knocking in the non-torque transmission state can also be buffered via the spoke spring 3, thereby reducing noise as well.

[0021] Parameters such as the number, size, and distribution pattern of the spoke springs 3 in the torque transmission mechanism can be selected according to specific needs, for example, according to the magnitude of the torque to be transmitted. In a preferred embodiment, these spoke springs 3 of the torque transmission mechanism are preferably evenly spaced circumferentially, and each spoke spring 3 preferably has substantially the same shape and size in order to enable the elastic deformation of the plurality of spoke springs 3 to occur synchronously.

[0022] In a preferred embodiment, in order to facilitate the control of the deformation state of the spoke spring 3, the outer ring portion 1, the central portion 2, and all the spoke springs 3 preferably extend substantially in the same plane perpendicular to the central axis O. This enables the elastic deformation of the spoke spring 3 to also occur substantially in this plane.

[0023] The outer ring portion 1, the central portion 2, and the plurality of spoke springs 3 of the torque transmission mechanism can be integrally formed components, or can also be formed by fixing together a plurality of laminated structures. In an embodiment where the torque transmission mechanism has a plurality of laminated structures, as Figure 3 shown, the torque transmission mechanism can include a plurality of sheets. When observed axially, each sheet can have substantially the same size and shape as the complete torque transmission mechanism, and are axially stacked in sequence in such a way that the projections of the respective sheets in the axial direction substantially coincide with each other. In this arrangement, each sheet has portions corresponding to the outer ring portion 1, the central portion 2, and the respective spoke springs 3. These sheets can be fixed together by fasteners 4 that pass axially through the respective sheets in sequence. The fasteners 4 can be common fasteners such as screws, rivets, or bolts, for example. The torque transmission mechanism can include a plurality of fasteners 4. These fasteners 4 can be distributed in the area of the outer ring portion 1 of the torque transmission mechanism, the area of the central portion 2, or simultaneously distributed in the areas of both the outer ring portion 1 and the central portion 2. As Figure 1As shown, when there are multiple fasteners 4 in the region of the outer ring portion 1, these fasteners 4 can be circumferentially spaced in the region of the outer ring portion 1, preferably evenly circumferentially spaced; similarly, as Figure 3 shown, when there are multiple fasteners 4 in the region of the central portion 2, these fasteners 4 can be circumferentially spaced in the region of the central portion 2, preferably evenly circumferentially spaced.

[0024] As two torque transmission ends of the torque transmission mechanism, the outer ring portion 1 and the central portion 2 can be respectively drivingly connected to the corresponding rotating components in a variety of different ways. For example, both the outer ring portion 1 and the central portion 2 can be drivingly connected to the corresponding rotating components through gear teeth or splines. Specifically, for the outer ring portion 1, the torque transmission mechanism can include external teeth or external splines 1a located on the outer ring portion 1 (especially at the outer peripheral edge of the outer ring portion 1), and the external teeth or external splines 1a are used to mesh with the matching gear teeth or splines of the first rotating component (not shown) to transmit torque; for the central portion 2, the torque transmission mechanism can include internal teeth or internal splines (not shown) located on the central portion 2 (especially at the inner peripheral edge of the central portion 2), and the internal teeth or internal splines are used to mesh with the matching gear teeth or splines of the second rotating component (not shown) to transmit torque.

[0025] For the outer ring portion 1 and / or the central portion 2 that achieve driving connection through gear teeth or splines, the gear teeth or splines can be integrally formed or additionally attached. For example, in Figure 1 the illustrated embodiment, the external teeth or external splines 1a are integrally formed on the outer peripheral edge of the outer ring portion 1. This is mainly applicable to the case where the axial thickness of the torque transmission mechanism itself is large enough or the number of laminations is large enough to ensure the strength of the gear teeth or splines. Alternatively, in Figure 2 the illustrated embodiment, the external teeth or external splines 1a are formed as an independent component (such as a ring body with gear teeth or splines), and then fixedly attached to the outer ring portion 1. The external teeth or external splines 1a can be attached to the outer ring portion 1 by welding or fasteners, etc. For example, they can be fixed to the outer ring portion 1 by the fasteners 4 used to fix the multiple laminations of the torque transmission mechanism. This is particularly applicable to the case where the axial thickness of the torque transmission mechanism itself is not large enough or the number of laminations is not large enough to ensure the strength of the gear teeth or splines. The above two ways of forming the external teeth or external splines 1a are similarly applicable to the internal teeth or internal splines of the central portion 2.

[0026] In addition to driving connection with the external rotating components through gear teeth or splines, the outer ring portion 1 and / or the central portion 2 can be directly fixed together with the corresponding rotating components, for example, directly fixed to the shaft through fasteners.

[0027] In some exemplary embodiments, when the torque transmission mechanism is composed of multiple layers, all layers of the outer ring portion 1 and / or the central portion 2 may be connected to the corresponding rotating component through transmission at the same time, or may be connected to the corresponding rotating component through transmission only one or part of all the layers. This can be designed according to specific application requirements.

[0028] The torque transmission mechanism according to the utility model can buffer torque vibration through the spoke spring, and can also reduce the impact and knocking noise during torque reversal and in the non-torsion transmission state. This torque transmission mechanism can thus improve the NVH (vibration, noise and harshness) performance of the transmission system. At the same time, this torque transmission mechanism has a simple structure, is easy to process, has a low manufacturing cost, and does not require too much layout space. In addition, this vibration reduction mechanism can flexibly adjust the vibration reduction effect by changing the number and size of the spoke springs, and can flexibly adjust the torque capacity by changing the number of layers, so it has a wide range of adaptability.

[0029] Although possible embodiments are described exemplarily in the above description, it should be understood that there are still a large number of variations of embodiments through all known and other technical features and embodiments that can be easily thought of by the technician. It should also be understood that the exemplary embodiment is only an example, and such an embodiment does not limit the scope of protection, application and configuration of the utility model in any form. The above description is more to provide a technical guide for converting at least one exemplary embodiment to the technician, wherein various changes can be made, especially changes in the functions and structures of the components, as long as they do not depart from the scope of protection of the claims.

[0030] List of reference numerals

[0031] 1 Outer ring

[0032] 1a External teeth or external splines

[0033] 2 Center

[0034] 3 Spoke Spring

[0035] 4 Fasteners

[0036] 5 Drive shaft

[0037] O Center axis

Claims

1. A torque transmission mechanism capable of rotating about a central axis (O) to transmit torque between a first rotating member and a second rotating member, It is characterized in that The torque transmission mechanism comprises an outer ring portion (1), a center portion (2) and a plurality of spoke springs (3), wherein the outer ring portion (1) coaxially surrounds the radially outer side of the center portion (2), the outer ring portion (1) is used for transmission connection with the first rotating component, and the center portion (2) is used for transmission connection with the second rotating component, the plurality of spoke springs (3) are respectively connected radially between the outer ring portion (1) and the center portion (2) and are distributed at intervals along the circumferential direction, and the plurality of spoke springs (3) can be elastically deformed to allow the outer ring portion (1) to rotate relative to the center portion (2), thereby buffering the vibration of the torque transmitted between the outer ring portion (1) and the center portion (2).

2. The torque transmission mechanism according to claim 1, characterized in that: The outer ring portion (1), the central portion (2) and the plurality of spoke springs (3) extend in the same plane perpendicular to the central axis (O).

3. The torque transmission mechanism according to claim 1, characterized in that: The torque transmission mechanism includes a plurality of plate layers stacked in an axial direction.

4. The torque transmission mechanism according to claim 3, characterized in that: The plurality of sheets are fixed together by a fastener (4) passing through the plurality of sheets in the axial direction.

5. The torque transmission mechanism according to claim 1, characterized in that: The torque transmission mechanism comprises external teeth or external splines (1a) located on the outer ring portion (1) for driving connection with the first rotating component.

6. The torque transmission mechanism according to claim 5, characterized in that: The external teeth or external splines (1a) are formed integrally with the outer ring portion (1) or are fixedly attached to the outer ring portion (1).

7. The torque transmission mechanism according to claim 1, characterized in that: The torque transmission mechanism comprises internal teeth or internal splines located on the central portion (2) for driving connection with the second rotating component.

8. The torque transmission mechanism according to claim 7, characterized in that: The internal teeth or internal splines are integrally formed with the central part (2) or fixedly attached to the central part (2).

9. The torque transmission mechanism according to any one of claims 1 to 8, characterized in that: The plurality of spoke springs (3) are evenly distributed along the circumferential direction.

10. The torque transmission mechanism according to claim 9, characterized in that: The plurality of spoke springs (3) have the same shape and size.

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