Torque limiter, transmission assembly and vehicle

Abstract

The present disclosure relates to a torque limiter (100) comprising: a cover plate (10) adapted to be driven in rotation about an axis of rotation (X) and comprising an integrally formed carrier ring (12) and a plurality of tabs (13), the tabs (13) comprising carrier teeth (14) at a distance in the axial direction from the carrier ring (12); a pressure ring (20) arranged axially between the carrier ring (12) and the carrier teeth (14); the driven disc (30) is clamped between one of the bearing ring (12) and the bearing teeth (14) and the pressing ring (20) in a sliding manner; the elastic part (40) is axially arranged between the other one of the bearing ring (12) and the bearing teeth (14) and the pressing ring (20). The present disclosure also relates to a transmission assembly (1) comprising such a torque limiter (100) and a vehicle comprising such a transmission assembly (1).

Description

Technical Field

[0001] The present disclosure relates to a torque limiter and a transmission assembly comprising the torque limiter. In particular, the torque limiter has an integrally formed cover plate, has a compact and firm structure, and can be manufactured and assembled in a simple and cost-saving manner. Background Art

[0002] The torque generated by a motor vehicle engine is usually not constant and often fluctuates. This inconstant torque can be transmitted to the gearbox, causing vibrations in the gearbox and thus generating particularly undesirable noise or impacts, etc. In order to reduce the adverse effects of vibrations and improve the driving comfort of the motor vehicle, it is known to equip the motor vehicle transmission system with a torque fluctuation absorption mechanism. The torque fluctuation absorption mechanism can allow the fluctuations in the torque generated by the motor vehicle engine to be limited and absorbed. It is known that the torque fluctuation absorption mechanism can include a torsional vibration damper and a torque limiter. The torsional vibration damper usually absorbs and reduces the fluctuations in the torque through a spring structure, while the torque limiter can limit the torque fluctuations that exceed the maximum torque that the torsional vibration damper can allow. Specifically, when the torque fluctuation exceeds the maximum torque, the torque limiter will slip, thereby limiting the transmitted torque.

[0003] In the prior art, a torque limiter generally includes a torque limiter cover and a driven plate that can slide relative to the torque limiter cover. The torque limiter cover is fixedly connected to the flywheel of the motor vehicle engine and serves as a torque input portion. The slidable driven plate is clamped in the torque limiter cover by a spring force and is fixedly connected to the torsional vibration damper to transmit torque to the torsional vibration damper. The components for clamping the driven plate generally include an elastic component (such as a Belleville Spring) and a pressure plate.

[0004] In order to clamp the friction disc, the torque limiter cover needs to provide two axially opposite bearing surfaces. On the other hand, in order to facilitate the assembly of the elastic component, the pressure plate and the friction disc in the torque limiter cover, the torque limiter cover is generally composed of two cover plates connected together by riveting in the axial direction, and each cover plate provides a bearing surface. The two cover plates increase the cost of parts and make the torque limiter more expensive as a whole. In addition, in order to make the connection tight and uniform, the number of rivets used in this riveting is usually large, for example, 12 or more rivets are used. The use of a large number of rivets will complicate the assembly process of the torque limiter, there is a possibility of missing rivets, poor riveting quality, and additional control costs for the riveting process.

[0005] Therefore, the torque limiter in the existing torque fluctuation absorbing mechanism has the disadvantages of a large number of parts, high cost and difficulty in assembly. Utility Model Content

[0006] Therefore, the present disclosure aims to solve the above-mentioned problems existing in the existing torque limiters, and its purpose is to provide a torque limiter which has a compact and strong structure and can be manufactured and assembled in a simple and cost-saving manner.

[0007] The objective is achieved by a torque limiter according to an embodiment of the present disclosure, the torque limiter comprising: a cover plate, the cover plate being suitable for being driven to rotate around a rotation axis (X), and the cover plate comprising an integrally formed load-bearing ring and a plurality of protrusions, the protrusions comprising load-bearing teeth axially spaced a certain distance from the load-bearing ring; a pressure ring axially arranged between the load-bearing ring and the load-bearing teeth; a driven disk slidably clamped between the load-bearing ring and one of the load-bearing teeth and the pressure ring; an elastic member axially arranged between the load-bearing ring and the other of the load-bearing teeth and the pressure ring, and biasing the pressure ring toward the driven disk.

[0008] One of the purposes of the present disclosure is to provide a torque limiter, which has a compact and strong structure and can be manufactured and assembled in a simple and cost-saving manner. The cover plate of the torque limiter according to the present disclosure includes a load-bearing ring and load-bearing teeth formed integrally, and the load-bearing ring and the load-bearing teeth form axially opposite load-bearing surfaces, and the pressure ring, the elastic member and the driven plate are all retained between the load-bearing ring and the load-bearing teeth. Therefore, the cover plate according to the present disclosure is formed as a torque input part in the form of a single component, thereby simplifying the structure of the torque limiter and reducing the cost of parts. In addition, since the cover plate is formed in one piece and does not need to be assembled by riveting or the like, the assembly of the torque limiter according to the present disclosure becomes simpler, reducing its manufacturing cost.

[0009] The torque limiter according to the present disclosure may also have one or more of the following features alone or in combination.

[0010] According to an optional embodiment of the present disclosure, the cover plate further comprises a flange and a plurality of connecting portions, the flange being located radially outside the load-bearing ring and the tab, the connecting portion connecting the load-bearing ring to the flange, and the tab comprising a bent portion connecting the load-bearing tooth to the flange. According to the above features, the load-bearing ring and the tab of the cover plate are both connected to the flange, thereby forming an integral cover plate. The cover plate can be connected to an upstream component in a vehicle transmission system, such as a flywheel, etc., through the flange, so as to be suitable for being driven to form a torque input portion of a torque limiter.

[0011] According to an optional embodiment of the present disclosure, the bent portion is located radially outside the pressure ring, the driven disk and the elastic member. According to the above technical features, the connection between the tab and the flange portion is located radially outside the pressure ring, the driven disk and the elastic member. The bent portion of the tab can be formed by bending the tab by a workpiece during the assembly of the torque limiter. Before bending the tab to form the load-bearing teeth, the driven disk of the torque limiter, the pressure ring for clamping the driven disk, and the elastic member can all be conveniently placed on the load-bearing ring along the axial direction without being hindered by the tab, thereby simplifying the assembly of the torque limiter.

[0012] According to an optional embodiment of the present disclosure, each tab is arranged between two adjacent connecting parts in the circumferential direction, and the tab is spaced apart from the connecting parts at a predetermined distance on both sides of the circumferential direction. In other words, the circumferential dimension of the tab is smaller than the spacing dimension between two adjacent connecting parts. Preferably, the material of the tab and the material of the connecting part are discontinuous before forming the tab, but are spaced apart at the spacing dimension, which can facilitate the formation of the tab.

[0013] According to an optional embodiment of the present disclosure, the length of the tab extending from the flange to the end of the load-bearing tooth is shorter than the length of the connecting portion extending from the flange to the load-bearing ring. According to the above technical features, the material of the tab and the material of the load-bearing ring are discontinuous before the tab is formed, thereby facilitating the formation of the tab.

[0014] According to an optional embodiment of the present disclosure, the tab includes a weakened portion arranged at a connection between the bent portion and the load-bearing tooth, wherein the weakened portion reduces the difficulty of bending the tab to form the load-bearing tooth.

[0015] According to an optional embodiment of the present disclosure, the weakened portion is a weakened groove.

[0016] According to an optional embodiment of the present disclosure, the flange includes a plurality of bosses, which protrude in the direction axially away from the load-bearing ring, and each tab is arranged on one boss. According to the bosses, the axial distance between the connection portion between the tab and the flange and the load-bearing ring is increased. Thus, even when the axial length of the bent portion of the tab is compressed, it is possible to ensure that there is a sufficient axial distance between the load-bearing tooth and the load-bearing ring to accommodate the pressure ring, the driven disk and the elastic member. In addition, compressing the axial length of the bent portion can also increase the radial length of the load-bearing tooth, ensuring that the load-bearing tooth can extend radially to a position radially opposite to at least a portion of the load-bearing ring to clamp the pressure ring, the driven disk and the elastic member.

[0017] According to an optional embodiment of the present disclosure, the pressure ring has a plurality of radially extending anti-rotation teeth, and the anti-rotation teeth can be inserted between two adjacent connecting parts. According to this technical solution, if relative sliding in the circumferential direction occurs between the pressure ring and the cover plate, the anti-rotation teeth can abut against the connecting parts to prevent excessive sliding of the pressure ring. In other words, the anti-rotation teeth play a role in limiting the relative sliding between the pressure ring and the cover plate in the circumferential direction.

[0018] According to an optional embodiment of the present disclosure, each anti-rotation tooth is composed of two half teeth, and each half tooth abuts against one of the two adjacent connecting parts. Thus, the anti-rotation tooth can eliminate the relative sliding between the pressure ring and the cover plate as much as possible, and the size of the half tooth is not too large.

[0019] According to an optional embodiment of the present disclosure, the cover plate has a plurality of anti-rotation grooves, each of which is formed to be circumferentially arranged between two adjacent connecting portions and axially arranged between the load-bearing teeth and the load-bearing ring, and the anti-rotation teeth can be inserted into the corresponding anti-rotation grooves. According to this technical solution, if relative sliding in the circumferential direction occurs between the pressure ring and the cover plate, the anti-rotation teeth can abut against the anti-rotation grooves to prevent excessive sliding of the pressure ring. In other words, the anti-rotation teeth and the anti-rotation grooves play a role in limiting the relative sliding between the pressure ring and the cover plate in the circumferential direction.

[0020] According to an optional embodiment of the present disclosure, each anti-rotation tooth consists of two half teeth, and each half tooth abuts against one of two adjacent connecting parts.

[0021] According to an optional embodiment of the present disclosure, the flange includes a plurality of bosses, the bosses protrude in a direction axially away from the carrying ring, and each tab is arranged on one boss.

[0022] According to an optional embodiment of the present disclosure, the torque limiter further includes a friction lining disposed adjacent to at least one of two axial sides of the driven plate.

[0023] According to an optional embodiment of the present disclosure, the cover plate is formed by stamping.

[0024] According to an optional embodiment of the present disclosure, in the process of forming the cover plate, a plurality of U-shaped grooves are first punched out on the cover plate, and then the portion surrounded by the U-shaped grooves is punched out to form the tab. This step-by-step punching method can reduce the difficulty of punching out the tab.

[0025] The present disclosure also relates to a transmission assembly having a torque limiter as described above, and a torsional vibration damper. The torsional vibration damper has an input portion, an output portion, and a spring arranged to be compressed in a circumferential direction between the input portion and the output portion. The input portion of the torsional vibration damper is fastened to a driven plate of the torque limiter, or the input portion of the torsional vibration damper is integrally formed with the driven plate of the torque limiter.

[0026] The present disclosure also relates to a vehicle, which includes the transmission member as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other features and advantages of the present disclosure will become more apparent through the following detailed description of exemplary embodiments in conjunction with the accompanying drawings, and the description and drawings are only for illustrative purposes and are not intended to limit the scope of the present disclosure in any way. The following drawings are not intentionally drawn to scale according to actual size, and the focus is on illustrating the subject matter of the present disclosure. In the drawings:

[0028] Figure 1 is a schematic diagram of a transmission assembly according to an embodiment of the present disclosure.

[0029] Figure 2 is an exploded view of a transmission assembly according to one embodiment of the present disclosure.

[0030] Figure 3 is a cross-sectional view of a transmission assembly according to one embodiment of the present disclosure.

[0031] Figure 4 yes Figure 3 A partial cross-sectional view of a transmission assembly is shown with the torsion limiter shown in detail.

[0032] Figure 5 Shows Figure 3 Cover plate of the torsion limiter in the illustrated embodiment.

[0033] Figure 6 The attached diagram shows in detail Figure 5 A portion of the cover is shown.

[0034] Figure 7 The cross-sectional view shows in detail Figure 5 A portion of the cover is shown.

[0035] Figure 8 A cover plate of a torque limiter according to another embodiment of the present disclosure is shown.

[0036] Fig. 9 A pressure plate of a torsion limiter according to one embodiment of the present disclosure is shown.

[0037] Fig.10An elastic member of a torsion limiter according to one embodiment of the present disclosure is shown.

[0038] In the various figures, the same or similar components are denoted by the same reference numerals. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure.

[0040] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by ordinary technicians in the field to which the present disclosure belongs. Similar words such as "one", "an" or "the" used in the patent application specification and claims of the present disclosure do not indicate a quantitative limitation, but rather indicate the presence of at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Directions such as "axial", "radial" and "circumferential" are defined relative to the rotation axis X of the torque limiter. The axial direction is the direction in which the rotation axis X extends, the radial direction is the direction perpendicular to the rotation axis X, and the circumferential direction is the circumferential direction around the rotation axis X.

[0041] Figure 1 is a schematic diagram of a transmission assembly 1 according to an embodiment of the present disclosure. Figure 2 yes Figure 1 An exploded view of the transmission assembly is shown.

[0042] The transmission assembly 1 can be used to transmit torque between the engine and the gearbox of a motor vehicle. The transmission assembly 1 can be divided into two parts: a torque limiter 100 and a torsional vibration damper 200. The torque limiter 100 is connected to the crankshaft of the vehicle engine and is driven by the crankshaft to transmit torque around the rotation axis X. The torsional vibration damper 200 is located inside the torque limiter 100 as a whole and outputs the torque transmitted by the torque limiter 100 to the gearbox of the motor vehicle. The torque limiter 100 has a predetermined maximum torque, and the torque transmitted to the torsional vibration damper 200 will not exceed the maximum torque even when the torque generated by the engine exceeds the maximum torque.

[0043] refer to Figure 1 and Figure 3The torsional vibration damper 200 has an input portion 210, an output portion 220, and four springs 230 arranged to be compressed in the circumferential direction between the input portion 210 and the output portion 220. The input portion 210 is fixed to the driven plate 30 of the torque limiter 100 to receive the torque transmitted from the torque limiter 100. The spring 230 is a coil spring, one end of which is acted on by the input portion 210 and the other end of which acts on the output portion 220 to transmit the torque from the input portion 210 to the output portion 220. The spring 230 can absorb and reduce the fluctuation in torque by compression and extension.

[0044] Further references Figure 1 and Figure 3 Combined with Figure 2 and Figure 4-Figure 6 , the torque limiter 100 includes an integrally formed cover plate 10 adapted to be driven to rotate about a rotation axis X. Such a cover plate 10 may be formed by stamping or casting or the like. Specifically, the cover plate 10 includes a flange 11, a load ring 12, a plurality of tabs 13, and a plurality of connecting portions 16 connecting the load ring 12 to the flange 11. In this embodiment, the flange 11 includes a plurality of evenly distributed through holes on its outer circumference, which can be used to fix the cover plate 10 to a flywheel (not shown) by screws or the like. The load ring 12 and the tabs 13 are integrally formed with the flange 11, and thus rotate together about the rotation axis X. The tabs 13 include load teeth 14 and a bent portion 15, which connects the load teeth 14 to the flange 11. The load teeth 14 of the tabs 13 are spaced apart from the load ring 12 by a predetermined distance in the axial direction. Specifically, the bending portion 15 and the connecting portion 16 both have a certain axial extension length, so that the load-bearing teeth 14 and the load-bearing ring 12 are respectively located on two axial sides of the flange 11 .

[0045] refer to Figure 5 In the circumferential direction, the tab 13 of the cover plate 10 is arranged between two adjacent connecting portions 16. Figure 6 , the tab 13 is spaced apart from the connection portion 16 at a predetermined distance on both sides in the circumferential direction. In addition, the length of the tab 13 extending from the flange 11 to the end of the load-bearing tooth 14 is shorter than the length of the connection portion 16 extending from the flange 11 to the load-bearing ring 12. That is, if the cover plate 10 is flattened, the tab 13 is connected to the other parts of the cover plate 10 only through the bent portion 15, and its side and end are spaced apart from the other parts of the cover plate 10. The tab 13 having such a structure can be formed by multiple stamping. For example, a U-shaped groove can be stamped out on the cover plate 10 first, and then the portion surrounded by the U-shaped groove can be stamped out to form the tab 13. Compared with forming the tab by a single stamping, stamping out the U-shaped groove first weakens the connection strength between the portion surrounded by the U-shaped groove and the rest of the cover plate 10, making the tab 13 easier to be stamped.

[0046] The pressure ring 20 is axially arranged between the load ring 12 and the load teeth 14, and the driven disc 30 is slidably clamped between the load ring 12 and the pressure ring 20 by an elastic member 40 axially arranged between the load teeth 14 and the pressure ring 20. The elastic member 40 is supported by the load teeth 14 and presses the pressure ring 20 so that the driven disc 30 is pressed against the load ring 12. It is conceivable that the driven disc 30 is slidably clamped between the load teeth 14 and the pressure ring 20 by an elastic member 40 axially arranged between the load ring 12 and the pressure ring 20. The elastic member 40 is supported by the load ring 12 and presses the pressure ring 20 so that the driven disc 30 is pressed against the load teeth 14.

[0047] In the radial direction, the bent portion 15 of the tab 13 is located radially outside the pressure ring 20, the driven disk 30 and the elastic member 40. In other words, the connection portion between the tab 13 and the flange 11 is located radially outside the pressure ring 20, the driven disk 30 and the elastic member 40. The load-bearing teeth 14 of the tab 13 extend radially inward, preferably extending to at least partially axially opposite to the load-bearing ring 12. Figure 6 As shown in the top view, the projection of the load-bearing teeth 14 in the axial direction partially overlaps with the load-bearing ring 12 , which helps to firmly hold the pressure ring 20 , the driven plate 30 and the elastic member 40 between the load-bearing ring 12 and the load-bearing teeth 14 .

[0048] refer to Figure 4 and Figure 7 The first axial distance between the load-bearing tooth 14 and the flange 11 is determined by the axial extension length of the bent portion 15, and the second axial distance between the load-bearing ring 12 and the flange 11 is determined by the axial extension length of the connecting portion 16. The sum of the first and second axial distances is the axial distance between the load-bearing tooth 14 and the load-bearing ring 12. The pressure ring 20, the driven disc 30 and the elastic member 40 are all accommodated within the axial distance.

[0049] In some designs of the transmission assembly 1, the second axial distance between the bearing ring 12 of the cover plate 10 and the flange 11 is limited (e.g. Figure 8 As shown). In this case, in order to accommodate the pressure ring 20, the driven disk 30 and the elastic member 40, it is necessary to increase the first axial distance between the load-bearing tooth 14 and the flange 11. However, for the cover plate 10 formed by stamping, the total length of the tab 13 is limited. If the first axial distance is increased by increasing the axial extension length of the bent portion 15, the radial extension length of the load-bearing tooth 14 needs to be shortened. This may cause the load-bearing tooth 14 to be unable to extend to a radial position axially opposite to the load-bearing ring 12, which is not conducive to the retention of the pressure ring 20, the driven disk 30 and the elastic member 40 between the load-bearing ring 12 and the load-bearing tooth 14.

[0050] To this end, Figure 8In the illustrated embodiment, the cover plate 10 forms a plurality of bosses 11a on the flange 11. The bosses 11a protrude in the direction axially away from the load ring 12, and the tabs 13 are formed on the bosses 11a. The height of the bosses 11a compensates for the axial distance between the load teeth 14 and the load ring 12, and there is no need to increase the axial extension length of the bent portion 15, thereby ensuring that the load teeth 14 can extend to a radial position axially opposite to the load ring 12.

[0051] Fig. 9 A pressure ring 20 is shown. The pressure ring 20 includes a plurality of anti-rotation teeth 21 extending radially. Figure 3 and Figure 4 In the assembly structure of the torque limiter 100, the anti-rotation tooth 21 is inserted between two adjacent connecting parts 16. That is, when the torque limiter 100 is assembled, the angle of the pressure ring 20 is oriented so that the anti-rotation tooth 21 is aligned with the gap between the two connecting parts 16. If relative sliding occurs between the pressure ring 20 and the cover plate 10, the anti-rotation tooth 21 will abut against the connecting part 16 to prevent further sliding of the pressure ring 20. Specifically, the anti-rotation tooth 21 is composed of two half teeth 21a, and each half tooth 21a abuts against one of the two adjacent connecting parts 16 to eliminate relative sliding as much as possible. Alternatively, the width of the anti-rotation tooth 21 can also be set to be approximately equal to the gap between the adjacent connecting parts 16. Therefore, the anti-rotation tooth 21 plays the function of positioning the pressure ring 20 in the circumferential direction.

[0052] In an optional embodiment not shown in the drawings, a plurality of anti-rotation grooves may be provided on the cover plate 10, each of which is formed to be circumferentially arranged between two adjacent connecting portions 16 and axially arranged between the load-bearing teeth 14 and the load-bearing ring 12. The anti-rotation teeth 21 of the pressure ring 20 can be inserted into the corresponding anti-rotation grooves to achieve angular positioning between the pressure ring 20 and the cover plate 10.

[0053] Fig.10 The elastic member 40 is shown. The elastic member 40 has the form of a Belleville spring. Figure 3 and Figure 4 In the assembled structure of the torque limiter 100, the elastic member 40 presses against the load-bearing teeth 14 and the pressure ring 20 on both sides of the axial direction. The elastic member 40 is compressed in the axial direction, thereby exerting an elastic pressing force on the pressure ring 20. By changing the material of the elastic member 40, the magnitude of the pressing force can be adjusted, and thus the maximum torque that can be transmitted by the torque limiter 100 can be adjusted.

[0054] Through the above structure, the cover plate 10, the pressure ring 20 and the elastic member 40 of the torque limiter 100 can be driven by the flywheel to rotate together, and they together constitute the input side of the torque limiter 100. The torque output of the torque limiter 100 to the torsional vibration damper 200 is realized through the driven plate 30.

[0055] refer to Figure 3 The radially inner portion of the driven plate 30 is fixedly connected to the input portion 210 of the torsional vibration damper 200, while the radially outer portion thereof is slidably clamped between the carrier ring 12 and the pressure ring 20. Figure 4 In the illustrated embodiment, friction linings 31 are arranged on both axial sides of the driven disc 30. Therefore, the driven disc 30 contacts and interacts with the carrier ring 12 and the pressure ring 20 through the friction linings 31. In other embodiments not shown in the drawings, the friction lining 31 can also be arranged only on one axial side of the driven disc 30. Another conceivable technical solution is that the friction lining 31 is not provided at all, but the surfaces of the driven disc 30 and the pressure ring 20 or the carrier ring 12 that contact each other are treated to make them suitable for transmitting a certain torque.

[0056] When the transmission assembly is working, the engine of the motor vehicle drives the cover plate 10 to rotate around the rotation axis X through the flywheel. The pressure ring 20 and the elastic member 40 are also driven to rotate by the input member 110. The driven plate 30 interacts with the pressure ring 20 and the bearing ring 12 of the cover plate 10, thereby driving the driven plate 30 and the input part 210 of the torsional vibration damper 200 to rotate around the rotation axis X, thereby realizing the torque transmission to the torsional vibration damper 200.

[0057] When the torque transmitted from the flywheel to the torque limiter 100 is less than the maximum torque of the torque limiter 100, the driven plate 30 rotates together with the cover plate 10. On the contrary, if the torque transmitted from the flywheel to the torque limiter 100 reaches or exceeds the maximum torque of the torque limiter 100, slip occurs between the driven plate 30 and the cover plate 10, thereby limiting the torque transmitted to the torsional vibration damper 200 to the maximum torque of the torque limiter 100.

[0058] The torque limiter 100 as described above can be assembled in a simple manner. First, an integrally formed cover plate 10 is provided, which has a flange 11, a load ring 12, a tab 13, and a connection portion 16 connecting the load ring 12 to the flange 11. In particular, the tab 13 has a configuration of extending axially upward from the flange 11 as a whole, without forming the bent portion 15 and the load teeth 14. Then, the driven disc 30, the pressure ring 20, and the elastic member 40 are sequentially placed axially into the cover plate 10 and supported by the load ring 12. The connection position of the tab 13 to the flange 11 (i.e., the position of the bent portion 15) ensures that the driven disc 30, the pressure ring 20, and the elastic member 40 are axially placed in place without being hindered by the tab 13. In addition, when the pressure ring 20 is placed, its angular position is adjusted so that the anti-rotation teeth 21 are aligned with the gap between the two connection portions 16. Finally, the tab 13 is bent to form a bent portion 15 and a load-bearing tooth 14, and the pressure ring 20, the driven plate 30 and the elastic member 40 are axially maintained between the load-bearing ring 12 and the load-bearing tooth 14. In addition, the torsional vibration damper 200 can be first installed on the driven plate 30, and then the driven plate 30 is assembled. Optionally, the torsional vibration damper 200 is installed after the torque limiter 100 is assembled. As a result, the step of riveting the two cover plates of the torque limiter 100 can be omitted, and the installation of the driven plate, the pressure ring and the elastic member is convenient, thereby saving the cost and time spent on assembling the torque limiter 100 and improving the assembly success rate.

[0059] The bending of the tab 13 can be performed by a specially designed workpiece. A weakened portion 17 is also provided on the tab 13 to facilitate the bending of the tab 13. Figure 7 As shown, the weakened portion 17 is arranged at the connection between the bent portion 15 and the load-bearing tooth 14 and has the form of a weakened groove. It is understandable that the weakened portion 17 may also have other forms suitable for reducing the material strength of the connection between the bent portion 15 and the load-bearing tooth 14. For example, the weakened portion 17 may be a weakened hole extending along the connection inside the tab 13 for a certain length. When stamping the cover plate 10, a step of stamping or extruding such a weakened portion 17 separately may be provided.

[0060] According to another aspect of the present disclosure, a vehicle is provided, which includes the transmission assembly 1 as described above.

[0061] Certain features, structures or characteristics in one or more embodiments of the present disclosure may be appropriately combined.

[0062] The above is an explanation of the present disclosure and should not be considered as a limitation thereof. Although several exemplary embodiments of the present disclosure are described, it will be readily appreciated by those skilled in the art that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure as defined in the claims. It should be understood that the above is an explanation of the present disclosure and the present disclosure should not be considered to be limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the present disclosure.

Claims

1. A torque limiter (100), characterized in that: The torque limiter (100) comprises: a cover plate (10) adapted to be driven to rotate about a rotation axis (X), and comprising an integrally formed carrying ring (12) and a plurality of tabs (13), wherein the tabs (13) comprise carrying teeth (14) axially spaced from the carrying ring (12); A pressure ring (20), the pressure ring (20) being arranged axially between the load-bearing ring (12) and the load-bearing teeth (14); A driven plate (30) slidably sandwiched between the load ring (12), one of the load teeth (14) and the pressure ring (20); An elastic member (40) is axially arranged between the other of the load ring (12) and the load teeth (14) and the pressure ring (20), and biases the pressure ring (20) toward the driven plate (30).

2. The torque limiter (100) according to claim 1, characterized in that: The cover plate (10) further comprises a flange (11) and a plurality of connecting portions (16), wherein the flange (11) is located radially outside the carrying ring (12) and the tab (13), and the connecting portions (16) connect the carrying ring (12) to the flange (11), and The tab (13) comprises a bend (15) connecting the load-bearing tooth (14) to the flange (11).

3. The torque limiter (100) according to claim 2, characterized in that: The bent portion (15) is located radially outside the pressure ring (20), the driven disk (30) and the elastic member (40).

4. The torque limiter (100) according to claim 2 or 3, characterized in that: Each tab (13) is arranged between two adjacent connection parts (16) in the circumferential direction, and the tab (13) is spaced apart from the connection parts (16) at a predetermined distance on both sides in the circumferential direction.

5. The torque limiter (100) according to claim 2 or 3, characterized in that: The length of the tab (13) extending from the flange (11) to the distal end of the load-bearing tooth (14) is shorter than the length of the connecting portion (16) extending from the flange (11) to the load-bearing ring (12).

6. The torque limiter (100) according to claim 2 or 3, characterized in that: The tab (13) comprises a weakened portion (17) arranged at the connection between the bent portion (15) and the load-bearing tooth (14).

7. The torque limiter (100) according to claim 6, characterized in that: The weakened portion (17) is a weakened groove.

8. The torque limiter (100) according to claim 2 or 3, characterized in that: The flange (11) includes a plurality of bosses (11a) which protrude in an axial direction away from the carrier ring (12), and each tab (13) is arranged on one boss (11a).

9. The torque limiter (100) according to claim 2 or 3, characterized in that: The pressure ring (20) has a plurality of radially extending anti-rotation teeth (21), and the anti-rotation teeth (21) can be inserted between two adjacent connecting parts (16).

10. The torque limiter (100) according to claim 9, characterized in that: Each anti-rotation tooth (21) is composed of two half teeth (21a), and each half tooth (21a) abuts against one of two adjacent connecting parts (16).

11. The torque limiter (100) according to claim 9, characterized in that: The cover plate (10) has a plurality of anti-rotation grooves, each of which is formed to be circumferentially arranged between two adjacent connecting portions (16) and axially arranged between the load-bearing teeth (14) and the load-bearing ring (12), and the anti-rotation teeth (21) can be inserted into the corresponding anti-rotation groove.

12. The torque limiter (100) according to claim 11, characterized in that: Each anti-rotation tooth (21) is composed of two half teeth (21a), and each half tooth (21a) abuts against one of two adjacent connecting parts (16).

13. The torque limiter (100) according to claim 11, characterized in that: The flange (11) includes a plurality of bosses (11a) which protrude in an axial direction away from the carrier ring (12), and each tab (13) is arranged on one boss (11a).

14. The torque limiter (100) according to any one of claims 1 to 3, characterized in that: The torque limiter (100) further comprises a friction lining (31) arranged adjacent to at least one of the two axial sides of the driven disc (30).

15. The torque limiter (100) according to any one of claims 1 to 3, characterized in that: The cover plate (10) is formed by stamping.

16. The torque limiter (100) according to claim 15, characterized in that In the process of forming the cover plate (10), a plurality of U-shaped grooves are first punched out on the cover plate (10), and then the portion surrounded by the U-shaped grooves is punched out to form the protruding piece (13).

17. A transmission assembly (1), characterized in that: The transmission assembly (1) comprises: The torque limiter (100) according to any one of claims 1 to 16, and A torsional vibration damper (200), the torsional vibration damper (200) comprising an input portion (210), an output portion (220), and a spring (230) arranged to be compressed in a circumferential direction between the input portion (210) and the output portion (220), The input portion (210) of the torsional vibration damper (200) is fastened to the driven plate (30) of the torque limiter (100), or the input portion (210) of the torsional vibration damper (200) is integrally formed with the driven plate (30) of the torque limiter (100).

18. A vehicle, characterized in that: The vehicle comprises a transmission assembly (1) according to claim 17.

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