Torque limiter, transmission assembly and vehicle

Abstract

The present disclosure relates to a torque limiter including a flywheel; a first axial bearing part; the second axial bearing part and the first axial bearing part are relatively fixed in the axial direction, and a certain distance is formed between the second axial bearing part and the first axial bearing part; the torque input disc is fixed relative to the flywheel in the radial direction and drives the flywheel to integrally rotate around the rotation axis; and the driven disc is used for outputting torque. The torque input disc and the driven disc are axially disposed between the first and second axial load bearing portions, the torque input disc being closer to the first axial load bearing portion and the driven disc being closer to the second axial load bearing portion. The torque input disc and the driven disc abut against each other with a certain axial force, and the driven disc is driven to rotate around the rotation axis through the friction force between the torque input disc and the driven disc. The present disclosure also relates to a transmission assembly including such a torque limiter and a vehicle including the transmission assembly.

Description

Technical Field

[0001] The present disclosure relates to a torque limiter. In particular, the torque limiter comprises a flywheel integrated in the torque limiter. The present disclosure also relates to a transmission assembly comprising such a torque limiter and a vehicle comprising the transmission assembly. 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 vehicle, it is known to equip the vehicle transmission system with a torque fluctuation absorption mechanism. The torque fluctuation absorption mechanism can allow the fluctuations in the torque generated by the 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, the flywheel fixed to the crankshaft of the vehicle engine is the upstream component of the torque limiter in the vehicle transmission system. The torque limiter is fixed to the flywheel and driven by the flywheel. The flywheel and the torque limiter are split structures. During installation, the flywheel is first fixed to the engine crankshaft by fasteners such as bolts, and the torque limiter is then fixed to the flywheel by bolts. This split structure of the flywheel and the torque limiter requires two steps to install the flywheel and the torque limiter respectively, which increases the assembly process. In addition, this split structure also increases the number of parts of the torque limiter, resulting in an increase in material costs.

[0004] Therefore, the existing torque limiter and flywheel have the disadvantages of large number of parts, high cost and complicated assembly. Summary of the invention

[0005] Therefore, the present disclosure aims to solve the above-mentioned problems existing in the existing torque limiters and flywheels, and its purpose is to provide a torque limiter, which includes a flywheel integrated in the torque limiter, has a compact and strong structure, and can be manufactured and assembled in a simple and cost-saving manner.

[0006] The object is achieved by a torque limiter according to an embodiment of the present disclosure, which includes: a flywheel; a first axial bearing portion; a second axial bearing portion, which is relatively fixed to the first axial bearing portion in the axial direction and is at a certain distance; a torque input disc, which is relatively fixed to the flywheel in the radial direction and drives the flywheel to rotate integrally around the rotation axis; and a driven disc, which is used to output torque. The torque input disc and the driven disc are axially arranged between the first axial bearing portion and the second axial bearing portion, the torque input disc is arranged closer to the first axial bearing portion, and the driven disc is arranged closer to the second axial bearing portion. The torque input disc and the driven disc abut against each other with a certain axial force, and the torque input disc drives the driven disc to rotate around the rotation axis through the friction force between the torque input disc and the driven disc.

[0007] The torque limiter according to the present disclosure includes a flywheel integrated in the torque limiter, so the flywheel can be installed at the same time by a single assembly operation of installing the torque limiter, eliminating one assembly process. In the present disclosure, the torque input disc of the torque limiter drives the flywheel to rotate integrally in the circumferential direction. In addition, the relative fixation of the torque input disc and the flywheel in the radial direction can prevent the center of gravity of the flywheel from deviating from the rotation axis, thereby avoiding the flywheel from shaking during the torque transmission process. In the prior art, the flywheel is directly driven by the engine crankshaft, and the torque limiter is then driven by the flywheel. The transmission assembly according to the present disclosure has a power transmission path different from the prior art. The torque input disc of the torque limiter also drives the driven disc for outputting torque through friction. Relative sliding can occur between the torque input disc and the driven disc to limit the transmitted torque. The torque input disc drives both the flywheel and the driven disc at the same time, thereby reducing the number of components of the transmission assembly.

[0008] The transmission assembly according to the present disclosure may also have one or more of the following features alone or in combination.

[0009] According to one embodiment of the present disclosure, the torque limiter further comprises an elastic member axially arranged between the first axial bearing portion and the second axial bearing portion, the elastic member biasing one of the torque input disc and the driven disc toward the other of the torque input disc and the driven disc. The biasing force of the elastic member can increase the friction force between the torque input disc and the driven disc to adjust the maximum torque that the torque limiter can transmit.

[0010] According to an embodiment of the present disclosure, the torque input disc includes a plurality of locking teeth extending radially outward from an outer periphery thereof, and the torque input disc is fixed relative to the flywheel in the radial direction by the locking teeth.

[0011] According to an embodiment of the present disclosure, the elastic member is arranged between the first axial bearing portion and the torque input disc; or the elastic member is arranged between the driven disc and the second axial bearing portion.

[0012] According to one embodiment of the present disclosure, the torque limiter further comprises a friction lining arranged adjacent to at least one of the two axial sides of the driven disc. When the torque limiter is working, the torque input disc, the first and second axial bearing parts and the flywheel rotate together to form a torque input side. The torque is transmitted from the input side to the driven disc through the friction lining. When the torque input through the torque input disc exceeds the maximum torque that the torque limiter can transmit, the friction lining and the driven disc slip, thereby playing a role in eliminating torque fluctuations.

[0013] According to one embodiment of the present disclosure, at least one of the plurality of locking teeth is provided with a locking hole, and the torque input disc is fastened to the flywheel by a fastener passing through the locking hole. Through such fastening, the torque input disc and the flywheel rotate together, that is, the torque input disc and the flywheel are fixed in three directions: circumferential, radial and axial.

[0014] According to one embodiment of the present disclosure, the torque limiter further comprises an intermediate disk, which comprises: a plurality of load-bearing tabs; a load-bearing ring, which is axially spaced a certain distance from the load-bearing tabs, and each load-bearing tab is connected to the load-bearing ring via a pair of connecting strips; a plurality of load-bearing teeth, each of which is arranged on the radial inner side of a corresponding load-bearing tab, and each load-bearing tooth is arranged between the corresponding pair of connecting strips in the circumferential direction. The load-bearing teeth constitute a first axial load-bearing portion of the torque limiter, and the load-bearing ring constitutes a second axial load-bearing portion of the torque limiter.

[0015] According to an embodiment of the present disclosure, the load-bearing tooth is axially spaced a certain distance from the load-bearing tab, and is connected to the load-bearing tab via a bent portion.

[0016] According to one embodiment of the present disclosure, the locking tooth is located between two adjacent load-bearing tabs in the circumferential direction and is inserted into two adjacent pairs of connecting strips and / or between two adjacent load-bearing tabs.

[0017] According to an embodiment of the present disclosure, the torque input disc further includes a plurality of transmission teeth extending radially outward from an outer periphery thereof, and each transmission tooth is inserted between a corresponding pair of connecting strips.

[0018] According to one embodiment of the present disclosure, the flywheel includes a recessed portion recessed in the axial direction, and the locking tooth is accommodated in the recessed portion.

[0019] According to one embodiment of the present disclosure, at least one of the multiple locking teeth is provided with a locking hole, and the flywheel is provided with a matching hole aligned with the locking hole. The locking pin passes through the locking hole and is inserted into the matching hole, so that the torque input disk is fixed relative to the flywheel in the radial direction.

[0020] According to an embodiment of the present disclosure, the flywheel includes a main body portion and a flange portion extending radially inward from the main body portion, and the flange portion constitutes one of a first axial bearing portion or a second axial bearing portion of the torque limiter.

[0021] According to one embodiment of the present disclosure, the torque limiter further comprises a bearing plate fastened to the flywheel, the bearing plate being axially spaced a certain distance from the flange portion and constituting the other of the first axial bearing portion or the second axial bearing portion of the torque limiter.

[0022] According to an embodiment of the present disclosure, the carrier plate extends beyond the matching hole to constrain the axial position of the locking pin. In other words, the movement of the locking pin toward the carrier plate and away from the matching hole in the axial direction is restricted by the carrier plate.

[0023] According to one embodiment of the present disclosure, the flywheel includes a coupling groove arranged on the inner circumference of the main body, the matching hole is located in the coupling groove in the circumferential direction, and the locking tooth is inserted into the coupling groove.

[0024] According to an embodiment of the present disclosure, the torque limiter further comprises two bearing plates respectively fastened to the flywheel on both axial sides of the flywheel, and the two bearing plates respectively constitute a first bearing portion and a second bearing portion of the torque limiter.

[0025] According to one embodiment of the present disclosure, the flywheel includes a coupling groove arranged on an inner circumference thereof, and the locking tooth is inserted into the coupling groove.

[0026] According to one embodiment of the present disclosure, the torque input disc is provided with at least one locking hole, the flywheel is provided with a matching hole aligned with the locking hole, and the locking pin passes through the locking hole and is inserted into the matching hole, so that the torque input disc is fixed relative to the flywheel in the radial direction.

[0027] The present disclosure also relates to a transmission assembly, which includes a torque limiter and a torsional vibration damper as described above. The torsional vibration damper includes 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 together with a driven plate of the torque limiter, or the input portion of the torsional vibration damper is formed integrally with the driven plate of the torque limiter.

[0028] According to one embodiment of the present disclosure, the torsional vibration damper includes a through-hole, through which a fastener can pass to fasten the torque input disc of the torque limiter to the upstream component of the transmission assembly.

[0029] The present disclosure also relates to a vehicle, which includes the transmission member as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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:

[0031] Figure 1 is a schematic diagram of a transmission assembly according to an embodiment of the present disclosure.

[0032] Figure 2 is an exploded view of a transmission assembly according to one embodiment of the present disclosure.

[0033] Figure 3 is a cross-sectional view of a transmission assembly according to an embodiment of the present disclosure.

[0034] Figure 4 yes Figure 3 An enlarged view of a portion of the apparatus showing the torsion limiter in detail.

[0035] Figure 5 Shown in detail Figure 3 Part of the intermediate disk of the torsion limiter in the illustrated embodiment.

[0036] Figure 6 Shows Figure 3 Torque input disc in the illustrated embodiment.

[0037] Figure 7 It is a schematic diagram of the cooperation between the torque input disc and the intermediate disc.

[0038] Figure 8 The cooperation of the flywheel, torque input disc and intermediate disc is shown from different perspectives.

[0039] Fig. 9 is a partial cross-sectional view of a torque limiter according to another embodiment of the present disclosure.

[0040] Fig.10 Shows Fig. 9 Torque input disc in the embodiment shown.

[0041] Fig.11 Shows Fig. 9 The flywheel in the embodiment shown.

[0042] In the various figures, the same or similar components are denoted by the same reference numerals. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] refer to 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 20 of the torque limiter 100 or formed integrally with the driven plate 20 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 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 fluctuations in torque by compression and extension. It is conceivable that the driven plate 20 of the torque limiter 100 can also be fixed to the output portion 220 of the torsional vibration damper 200. The torsional vibration damper 200 includes a through-hole 201 through which a fastener such as a bolt can pass to fasten the torque input disc 10 of the torque limiter 100 to an upstream component of the transmission assembly 1 , such as a crankshaft of an engine.

[0048] Further references Figure 1 and Figure 2 Combined with Figures 3 to 8 , the torsion limiter 100 includes a flywheel 60, a torque input disc 10, a driven disc 20, an elastic member 30, and an intermediate disc 40. The torque input disc 10 is connected to an upstream component such as an engine crankshaft at its radial inner side. Thus, the torsion limiter 100 receives torque from the engine through the torque input disc 10. The torque input disc 10 needs to be connected to the engine crankshaft, and thus is closer to the engine side (at the center) than the driven disc 20 for outputting torque. Figure 4 The middle is the lower side).

[0049] The flywheel 60 is in the form of an inertia ring, which is relatively fixed to the torque input disc 10 in the circumferential direction and is driven by the torque input disc 10 to rotate around the rotation axis X. The flywheel 60 is also relatively fixed to the torque input disc 10 in the radial direction to keep the center of gravity of the flywheel 60 on the rotation axis X to prevent the flywheel 60 from shaking during the transmission process. The flywheel 60 has a large moment of inertia and can be used to absorb the fluctuation of the engine torque output to make its torque output more uniform. Figure 6 and Fig.10 A plurality of locking teeth 11 extending radially outward are provided on the outer periphery of the torque input disc 10. The torque input disc 10 is relatively fixed to the flywheel 60 in the radial direction through the locking teeth 11, and the flywheel 60 is driven to rotate through the locking teeth 11.

[0050] The radially inner portion of the driven plate 20 is fixedly connected to the input portion 210 of the torsional vibration damper 200, while the radially outer portion thereof and the torque input plate 10 abut against each other with a certain axial force. Figure 4In the illustrated embodiment, friction linings 21 are arranged adjacent to the driven disc 20 on both axial sides of the driven disc 20. Therefore, the driven disc 20 contacts and interacts with the friction linings 21 at both axially opposite surfaces thereof. In other embodiments not shown in the drawings, the friction linings 21 may be arranged only on one side of the axial sides of the driven disc 20. Another conceivable technical solution is that the friction linings 21 are not arranged at all, but the surface of the torque input disc 10 or the driven disc 20 is treated in a certain manner so as to be suitable for transmitting a certain torque.

[0051] When the transmission assembly is working, the engine of the vehicle drives the torque input disc 10, and the torque input disc 10 in turn drives the flywheel 60 to rotate around the rotation axis X through the locking teeth 11. Through the direct friction between the torque input disc 10 and the driven disc 20 or the indirect friction generated by the friction lining 21, the torque input disc 10 can also drive the driven disc 20 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. When the torque transmitted from the engine to the torque limiter 100 reaches or exceeds the maximum torque of the torque limiter 100, slip occurs between the driven disc 20 and the torque input disc 10, thereby limiting the torque transmitted to the torsional vibration damper 200 to the maximum torque of the torque limiter 100.

[0052] In order to enable the torque input disc 10 and the driven disc 20 to abut against each other, the torque limiter 100 needs to include two axial bearing parts, between which the torque input disc 10 and the driven disc 20 are axially arranged. Without loss of generality, in the present disclosure, the axial bearing part closer to the torque input disc 10 is referred to as the first axial bearing part, and the axial bearing part closer to the driven disc 20 is referred to as the second axial bearing part.

[0053] The greater the friction between the torque input disc 10 and the driven disc 20, the greater the maximum torque that can be transmitted by the torque limiter 100. Increasing the axial force between the torque input disc 10 and the driven disc 20 against each other can increase the friction between the two. To this end, the torsion limiter 100 includes an elastic member 30 axially arranged between the first axial bearing portion and the second axial bearing portion. The elastic member 30 may be in the form of a disc spring, which is supported by the first axial bearing portion or the second axial bearing portion and axially presses the torque input disc 10 toward the driven disc 20, or axially presses the driven disc 20 toward the torque input disc 10. Optionally, the torque input disc 10 may also be formed by an elastic material, so that the torque input disc 10 itself can generate an axial force that pushes the driven disc 20 toward the second axial bearing portion, thereby eliminating the need to provide a dedicated elastic member.

[0054] exist Figure 4-Figure 8 In the illustrated embodiment, the torque input disc 10 and the flywheel 60 are fastened together. Figure 4As shown, a locking hole 12 is provided on the locking tooth 11 of the torque input disc 10, and a fastener 63 passes through the locking hole 12 to fasten the torque input disc 10 to the flywheel. The fastener 63 may be a screw, a rivet, a threaded rod, etc. Figure 8 The flywheel 60 includes a recessed portion 64 that is recessed in the axial direction, and the locking teeth 11 are accommodated in the recessed portion 64. The recessed portion 64 can make it easier to position the torque input disc 10 and the flywheel 60 in the circumferential direction. In addition, the locking teeth 11 can also abut against the side wall of the recessed portion 64, thereby achieving relative fixation of the torque input disc 10 and the flywheel 60 in the circumferential direction without relying on fasteners, and transmitting torque.

[0055] In this embodiment, the first axial bearing portion and the second axial bearing portion of the torsion limiter 100 are provided by the intermediate disk 40. Figure 4 and Figure 5 , the intermediate disk 40 is integrally formed and includes a plurality of load-bearing tabs 41 and a load-bearing ring 42. The load-bearing ring 42 is spaced apart from the load-bearing tabs 41 by a predetermined distance in the axial direction, and each load-bearing tab 41 is connected to the load-bearing ring 42 by a pair of connecting strips 43. The intermediate disk 40 further includes a plurality of load-bearing teeth 44 arranged on the radial inner side of the load-bearing tab 41. In the circumferential direction, each load-bearing tooth 44 is arranged between a pair of connecting strips 43 that connect the corresponding load-bearing tab 41 to the load-bearing ring 42. In addition, the outer diameter of the load-bearing ring 42 is smaller than the diameter of the radial inner side of the load-bearing tab 41, so that the projection of the load-bearing ring 42 in the axial direction is within the load-bearing tab 41.

[0056] The driven plate 20 is slidably clamped between the load ring 42 and the torque input plate 10 by the elastic member 30 axially arranged between the load teeth 44 and the torque input plate 10. The torque input plate 10 and the driven plate 20 are axially located between the load teeth 44 and the load ring 42 of the first ring 41. The load teeth 44 and the load ring 42 constitute two axial load-bearing parts of the torque limiter 100. Figure 4 In the illustrated embodiment, the load-bearing teeth 44 constitute a first axial load-bearing portion of the torque limiter 100 , and the load-bearing ring 42 constitutes a second axial load-bearing portion of the torque limiter 100 .

[0057] The carrying ring 42 and the carrying tab 41 are connected to each other through a plurality of connecting strips 43. Figure 5, one end of a pair of connecting strips 43 is connected to the radial inner side of the load-bearing tab 41, and extends axially to the height of the load-bearing ring 42, and is connected to the radial outer side of the load-bearing ring 42. In the circumferential direction, the load-bearing tabs 41 are evenly distributed, and the load-bearing teeth 44 are located between the pair of connecting strips 43 connecting the load-bearing tab 41 to the load-bearing ring 42 at the radial inner side of the load-bearing tab 41, and are axially spaced a certain distance from the load-bearing tab 41, and are connected to the load-bearing tab 41 through a bent portion 45, so that they are located radially inside the load-bearing tab 41. Before assembling the torque limiter 100, the load-bearing teeth 44 may be axially extended from the load-bearing tab 41, and the bent portion 45 is formed by bending the load-bearing teeth 44 by a workpiece during the process of assembling the torque limiter 100. In this way, the load-bearing teeth 44 will neither hinder the assembly of the torque input disc 10, the driven disc 20 and / or the elastic member 30 in the axial direction, but can also support the elastic member 30 after the assembly is completed, thereby clamping the torque input disc 10, the driven disc 20 and / or the elastic member 30 between the load-bearing teeth 44 and the load-bearing ring 42.

[0058] Figure 7 The figure shows the cooperation between the torque input disc 10 and the intermediate disc 40. As shown in the figure, in the assembled structure of the torque limiter 100, the locking tooth 11 of the torque input disc 10 extends radially and is located between two adjacent load-bearing tabs 41 in the circumferential direction. The intermediate disc 40 can be moved relative to the torque input disc 10 in the axial direction, for example, under the action of the elastic member 30. The axial position where the locking tooth 11 is inserted into the intermediate disc 40 can also be changed. The locking tooth 11 can be inserted between two adjacent load-bearing tabs 43 in the axial direction closer to the load-bearing tab 43, or can be inserted between two adjacent pairs of connecting strips 43 in the axial direction closer to the load-bearing ring 42. Correspondingly, there can be a certain axial gap between the load-bearing tab 41 of the intermediate disc 40 and the flywheel 60.

[0059] If relative sliding occurs between the torque input disc 10 and the intermediate disc 40 in the circumferential direction, the locking teeth 11 will abut against the side wall of the bearing tab 41 or the connecting strip 43, preventing further sliding of the intermediate disc 40. Therefore, the locking teeth 11 fix the intermediate disc 40 relative to the torque input disc 10 in the circumferential direction. This also realizes the torque transmission from the torque input disc 10 to the intermediate disc 40. Figure 7 In the illustrated embodiment, the width of the locking tooth 11 is substantially equal to the width of the interval between two adjacent load-bearing tabs 43 and / or the interval between two adjacent pairs of connecting strips 43, so as to eliminate relative sliding as much as possible. It can be understood by those skilled in the art that the width of the locking tooth 11 can also be smaller than the width of the interval between two adjacent load-bearing tabs 43 or the interval between two adjacent pairs of connecting strips 43.

[0060] The torque input disc 10 may also have a plurality of transmission teeth 13, which extend radially outward from the outer periphery of the torque input disc 10 and are arranged between adjacent locking teeth 11. In the assembled configuration of the torque limiter 100, the angular position of the transmission teeth 13 substantially coincides with the load-bearing teeth 44, which are inserted between a corresponding pair of connecting strips 43. The cooperation between the transmission teeth 13 and the connecting strips 43 may also fix the intermediate disc 40 relative to the torque input disc 10 in the circumferential direction.

[0061] Through the above structure, the torque input disc 10, the intermediate disc 40 and the flywheel 60 of the torque limiter 100 are relatively fixed in the circumferential direction and 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 disc 20.

[0062] Figure 9-11 1 shows another embodiment of the torque limiter. In this embodiment, the radial locking of the torque input disc 10 and the flywheel 60 is achieved by a locking pin 66. As shown in the figure, a locking hole 12 is provided on the locking tooth 11 of the torque input disc 10, and a matching hole 65 aligned with the locking hole 12 is provided on the flywheel 60. The locking pin 66 passes through the locking hole 12 and is inserted into the matching hole 65, so that the torque input disc 10 is relatively fixed to the flywheel 60 in both the circumferential direction and the radial direction. Fig. 9 The matching hole 65 shown is a blind hole, which is conducive to constraining the axial position of the locking pin 66. Optionally, the matching hole 65 can also be configured as a through hole, and the locking pin 66 is interference-fitted with the matching hole 65 so that it will not fall off the flywheel.

[0063] In addition, the torque limiter 100 in this embodiment also omits the intermediate disk 40, and uses other components as the axial bearing part. The following description will mainly focus on Figure 4-8 Different aspects of the embodiments are shown.

[0064] exist Fig. 9 In the illustrated embodiment, the flywheel 60 of the torque limiter 100 includes a main body 61 and a flange 62 extending radially inward from the main body 61. The torque limiter 100 also includes a carrier plate 50 fastened to the flywheel 60, and the carrier plate 50 is axially spaced a certain distance from the flange 62. Fig. 9 The flange portion 62 constitutes one of the first axial bearing portion or the second axial bearing portion of the torque limiter 100. The torque input disc 10 and the driven disc 20 are arranged between the bearing disc 50 and the flange portion 62 in the axial direction. The bearing disc 50 and the flange portion 62 constitute two axial bearing portions of the torque limiter 100. Fig. 9In the illustrated embodiment, the carrier plate 50 is closer to the torque input plate 10, constituting the first axial bearing portion of the torque limiter 100, while the flange portion 62 is closer to the driven plate 20, constituting the second axial bearing portion of the torque limiter 100. It is conceivable that the flange portion 62 and the carrier plate 50 of the flywheel 60 may also be reversed in axial position, that is, the flange portion 62 constitutes the first axial bearing portion of the torque limiter 100, and the carrier plate 50 constitutes the second axial bearing portion of the torque limiter 100.

[0065] In addition, if Fig. 9 As shown, the carrier plate 50 extends beyond the matching hole 65 of the flywheel 60 to constrain the axial position of the locking pin 66. The locking pin 66 cannot axially move beyond the carrier plate 50, so that it will not move out of the matching hole 65.

[0066] In addition to the circumferential fixation by the locking pin 66, the flywheel 60 is also provided with a coupling groove 67 for circumferential fixation and torque transmission between the flywheel 60 and the torque input disc 10. Specifically, as Fig.11 As shown, the coupling groove 67 is provided on the inner circumference of the main body 61 of the flywheel 60, and the locking teeth 11 of the torque input disc 10 are inserted into the coupling groove 67. Thus, the torque input disc 10 and the flywheel 60 are relatively fixed in the circumferential direction by the cooperation between the locking teeth 11 and the coupling groove 67. Accordingly, the matching holes 65 of the flywheel 60 are also arranged in the coupling groove 67 in the circumferential direction, so as to be aligned with the locking holes 12 on the locking teeth 11.

[0067] Although not shown in the drawings, the axial bearing function of the torque limiter 100 may also be provided only by the bearing plate 50 fastened to the flywheel 60. In such an embodiment, the flywheel 60 may not include a flange portion, but the torque limiter 100 includes two bearing plates 50 fastened to the flywheel 60 on both sides of the axial direction of the flywheel 60, and the two bearing plates 50 respectively constitute the first bearing portion and the second bearing portion of the torque limiter 100. In this embodiment, the relative fixation between the flywheel 60 and the torque input plate 10 in the circumferential direction and the radial direction is to be Figure 9-11 The difference is that, since the carrier plate 50 can constrain the locking pin 66 in two axial directions, the hole on the flywheel 60 that cooperates with the locking pin 66 can be either Fig. 9 The blind holes shown can also be through holes.

[0068] The above describes an embodiment in which the torque input disc 10 is relatively fixed to the flywheel in the radial direction by means of locking teeth. It is understandable that the torque input disc 10 may also be not provided with locking teeth, but the main body may be directly relatively fixed to the flywheel in the radial direction. For example, the locking hole 12 may be directly provided on the main body of the torque input disc 10 at a relatively radially outer position, and the flywheel 60 may be provided with a matching hole 65 aligned with the locking hole 12. The locking pin 66 passes through the locking hole 12 and is inserted into the matching hole 65, so that the torque input disc 10 is relatively fixed to the flywheel 60 in the radial direction.

[0069] Certain features, structures or characteristics in one or more embodiments of the present disclosure may be appropriately combined.

[0070] 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 flywheel (60); A first axial bearing portion; A second axial bearing portion, which is relatively fixed to the first axial bearing portion in the axial direction and is at a certain distance from the first axial bearing portion; A torque input disc (10) which is relatively fixed to the flywheel (60) in the radial direction and drives the flywheel (60) to rotate integrally around the rotation axis (X); The driven plate (20) is used to output torque. The torque input disc (10) and the driven disc (20) are axially arranged between the first axial bearing portion and the second axial bearing portion, the torque input disc (10) is arranged closer to the first axial bearing portion, and the driven disc (20) is arranged closer to the second axial bearing portion, and, The torque input disc (10) and the driven disc (20) abut against each other with a certain axial force, and the torque input disc (10) drives the driven disc (20) to rotate around the rotation axis (X) through the friction force between the torque input disc (10) and the driven disc (20).

2. The torque limiter (100) according to claim 1, characterized in that: The torque limiter (100) further comprises an elastic member (30) axially arranged between the first axial bearing portion and the second axial bearing portion, the elastic member (30) biasing one of the torque input disc (10) and the driven disc (20) toward the other of the torque input disc (10) and the driven disc (20).

3. The torque limiter (100) according to claim 2, characterized in that: The torque input disc (10) comprises a plurality of locking teeth (11) extending radially outward from its outer periphery, and the torque input disc (10) is fixed relative to the flywheel (60) in the radial direction via the locking teeth (11).

4. The torque limiter (100) according to claim 3, characterized in that: The elastic member (30) is arranged between the first axial bearing portion and the torque input disc (10); or The elastic member (30) is arranged between the driven disc (20) and the second axial bearing portion.

5. The torque limiter (100) according to claim 3, characterized in that: The torque limiter (100) further comprises a friction lining (21) arranged adjacent to at least one of the two axial sides of the driven disc (20).

6. The torque limiter (100) according to any one of claims 3 to 5, characterized in that: At least one of the plurality of locking teeth (11) is provided with a locking hole (12), and the torque input disc (10) is fastened to the flywheel (60) by a fastener (63) passing through the locking hole (12).

7. The torque limiter (100) according to claim 6, characterized in that: The torque limiter (100) further comprises an intermediate disk (40), wherein the intermediate disk (40) comprises: a plurality of load-bearing tabs (41); a carrying ring (42) which is axially spaced a certain distance from the carrying tabs (41), and each carrying tab (41) is connected to the carrying ring (42) by a pair of connecting strips (43); A plurality of load-bearing teeth (44), each of which is arranged on the radial inner side of a corresponding load-bearing protrusion (41), and each load-bearing tooth (44) is arranged between a corresponding pair of connecting strips (43) in the circumferential direction. The load-bearing teeth (44) constitute a first axial load-bearing portion of the torque limiter (100), and the load-bearing ring (42) constitutes a second axial load-bearing portion of the torque limiter (100).

8. The torque limiter (100) according to claim 7, characterized in that: The load-bearing tooth (44) is axially spaced a certain distance from the load-bearing tab (41), and is connected to the load-bearing tab (41) via a bent portion (45).

9. The torque limiter (100) according to claim 7 or 8, characterized in that: The locking tooth (11) is located between two adjacent load-bearing tabs (41) in the circumferential direction.

10. The torque limiter (100) according to claim 9, characterized in that: The torque input disc (10) further comprises a plurality of transmission teeth (13) extending radially outward from its outer periphery, and each transmission tooth (13) is inserted between a corresponding pair of connecting strips (43).

11. The torque limiter (100) according to claim 7 or 8, characterized in that: The flywheel (60) includes a recessed portion (64) recessed in the axial direction, and the locking tooth (11) is accommodated in the recessed portion (64).

12. The torque limiter (100) according to any one of claims 3 to 5, characterized in that: At least one of the plurality of locking teeth (11) is provided with a locking hole (12), the flywheel (60) is provided with a matching hole (65) aligned with the locking hole (12), and a locking pin (66) passes through the locking hole (12) and is inserted into the matching hole (65), so that the torque input disc (10) is fixed relative to the flywheel (60) in the radial direction.

13. The torque limiter (100) according to claim 12, characterized in that: The flywheel (60) includes a main body (61) and a flange (62) extending radially inward from the main body (61), wherein the flange (62) constitutes one of a first axial bearing portion or a second axial bearing portion of the torque limiter (100).

14. The torque limiter (100) according to claim 13, characterized in that: The torque limiter (100) further comprises a bearing plate (50) fastened to the flywheel (60), wherein the bearing plate (50) is axially spaced a certain distance from the flange portion (62) and constitutes the other of the first axial bearing portion or the second axial bearing portion of the torque limiter (100).

15. The torque limiter (100) according to claim 14, characterized in that The carrier plate (50) extends beyond the matching hole (65) to constrain the axial position of the locking pin (66).

16. The torque limiter (100) according to any one of claims 13 to 15, characterized in that: The flywheel (60) includes a coupling groove (67) arranged on the inner circumference of the main body (61), the matching hole (65) is located in the coupling groove (67) in the circumferential direction, and the locking tooth (11) is inserted into the coupling groove (67).

17. The torque limiter (100) according to claim 12, characterized in that: The torque limiter (100) further comprises two bearing plates (50) respectively fastened to the flywheel (60) on both axial sides of the flywheel (60), and the two bearing plates (50) respectively constitute a first bearing portion and a second bearing portion of the torque limiter (100).

18. The torque limiter (100) according to claim 17, characterized in that The flywheel (60) includes a coupling groove (67) arranged on an inner circumference thereof, and the locking tooth (11) is inserted into the coupling groove (65).

19. The torque limiter (100) according to claim 2, characterized in that: The torque input disc (10) is provided with at least one locking hole (12), the flywheel (60) is provided with a matching hole (65) aligned with the locking hole (12), and a locking pin (66) passes through the locking hole (12) and is inserted into the matching hole (65), so that the torque input disc (10) is relatively fixed to the flywheel (60) in the radial direction.

20. A transmission assembly (1), characterized in that: The transmission assembly (1) comprises: The torque limiter (100) according to any one of claims 1 to 19, 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 together with the driven plate (20) of the torque limiter (100), or the input portion (210) of the torsional vibration damper (200) is integrally formed with the driven plate (20) of the torque limiter (100).

21. The transmission assembly (1) according to claim 20, characterized in that The torsional vibration damper (200) comprises a through-hole (201) through which a fastener can pass to fasten the torque input disc (10) of the torque limiter (100) to an upstream component of the transmission assembly.

22. A vehicle comprising a transmission assembly (1) according to claim 20 or 21.

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