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 circumferential 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 circumferential 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 simultaneously through a single assembly operation of installing the torque limiter, eliminating one assembly process. In the present disclosure, the flywheel is driven by the torque input disc of the torque limiter. 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 that of the prior art. The torque input disc of the torque limiter also drives a 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 one embodiment of the present disclosure, the torque input disc of the torque limiter includes a plurality of transmission teeth extending radially outward or axially from its outer circumference, and the torque input disc drives the flywheel through the transmission teeth. The transmission teeth of the torque input disc can make it relatively fixed with the flywheel in the circumferential direction, and at the same time, it will not hinder the torque input disc from being placed between the first axial bearing portion and the second axial bearing portion during the assembly process.

[0011] According to one embodiment of the present disclosure, the torque input plate includes an inner plate and an outer plate fastened together, the outer plate is located radially outside the inner plate, and the transmission teeth are located at an outer periphery of the outer plate.

[0012] 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.

[0013] 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.

[0014] According to one embodiment of the present disclosure, the torque limiter further comprises an intermediate disk, the intermediate disk comprising: a first ring, the first ring being tightly connected to the flywheel; a plurality of connecting strips, the connecting strips being integrally formed with the first ring. At least a portion of the connecting strips extends axially, and the transmission teeth of the torque input disk can be inserted between two adjacent connecting strips.

[0015] According to this technical solution, the transmission teeth of the torque input disk can abut against the connecting strip of the intermediate disk, thereby transmitting the torque to the intermediate disk, and then transmitting the torque to the flywheel through the integrally formed first ring, thereby realizing the torque transmission between the torque input disk and the flywheel.

[0016] According to an embodiment of the present disclosure, the first ring includes a ring body and a plurality of first teeth, and each first tooth is arranged between two adjacent connecting strips in a circumferential direction.

[0017] According to one embodiment of the present disclosure, the ring body is fastened to the flywheel, the first teeth are arranged at the inner periphery of the ring body, and constitute one of a first axial bearing portion or a second axial bearing portion of the torque limiter.

[0018] According to one embodiment of the present disclosure, the ring body is fastened to the flywheel, the first teeth are arranged at the outer circumference of the ring body and fastened to the flywheel, and the ring body constitutes one of the first axial bearing portion or the second axial bearing portion of the torque limiter.

[0019] According to an embodiment of the present disclosure, the first tooth is axially spaced a certain distance from the ring body and is connected to the ring body via a bent portion.

[0020] According to one embodiment of the present disclosure, the intermediate disk further includes a second ring, which is axially spaced a certain distance from the first ring and is formed integrally with the connecting strip, and the second ring constitutes the other of the first axial bearing portion and the second axial bearing portion of the torque limiter. That is, the elastic member, the torque input disk and the driven disk are clamped between the ring body or the first tooth of the first ring and the second ring.

[0021] According to one embodiment of the present disclosure, the connecting strip includes a radially extending section which is axially spaced a certain distance from the first ring, and the radially extending section constitutes the other of the first axial bearing portion and the second axial bearing portion of the torque limiter. That is, the elastic member, the torque input disc and the driven disc are clamped between the ring body of the first ring or the radially extending section of the connecting strip.

[0022] 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.

[0023] According to one embodiment of the present disclosure, the flywheel further includes a support protrusion extending radially inward from the main body, the support protrusion is axially spaced a certain distance from the flange portion, and the support protrusion constitutes the other of the first axial bearing portion or the second axial bearing portion of the torque limiter. That is, the elastic member, the torque input disc and the driven disc are clamped between the flange portion and the support protrusion of the flywheel.

[0024] According to one embodiment of the present disclosure, the torque limiter further comprises a bearing plate fastened to the flywheel, the bearing plate is axially spaced a certain distance from the flange portion, and the bearing plate constitutes the other of the first axial bearing portion or the second axial bearing portion of the torque limiter. That is, the elastic member, the torque input plate and the driven plate are clamped between the flange portion of the flywheel and the bearing plate.

[0025] According to one embodiment of the present disclosure, the flywheel includes a coupling hole arranged on the flange portion, and the transmission tooth axially extends from the outer circumference of the torque input disc and can be inserted into the coupling hole, so that the torque input disc is relatively fixed to the flywheel in the circumferential direction. In other words, the transmission tooth of the torque input disc cooperates with the coupling hole to realize torque transmission between the torque input disc and the flywheel.

[0026] According to one embodiment of the present disclosure, the flywheel includes a coupling groove arranged on the inner circumference of the main body, and the transmission teeth extend radially from the outer circumference of the torque input disc and can be inserted into the coupling groove, so that the torque input disc is relatively fixed to the flywheel in the circumferential direction. In other words, the transmission teeth of the torque input disc cooperate with the coupling groove to realize torque transmission between the torque input disc and the flywheel.

[0027] According to one embodiment of the present disclosure, at least one of the plurality of supporting protrusions is provided with an anti-rotation groove.

[0028] According to one embodiment of the present disclosure, the elastic member has a plurality of peripheral teeth, each peripheral tooth is supported by a supporting protrusion, and one of the plurality of peripheral teeth is pressed against the bottom surface of the anti-rotation groove. According to this technical solution, if relative sliding occurs between the elastic member and the flywheel in the circumferential direction, the peripheral teeth can abut against the side wall of the anti-rotation groove to prevent excessive sliding of the elastic member. Therefore, the anti-rotation groove plays a role in limiting the relative sliding between the elastic member and the flywheel in the circumferential direction.

[0029] According to one embodiment of the present disclosure, the outer peripheral teeth of the elastic member have a size capable of passing through between adjacent support protrusions in the axial direction, and the elastic member can rotate an angle in the circumferential direction during assembly so that the outer peripheral teeth are supported on the support protrusions.

[0030] According to an embodiment of the present disclosure, the transmission teeth extend radially from the outer circumference of the torque input disc, each transmission tooth is supported by a support protrusion, and one of the plurality of transmission teeth presses against the bottom surface of the anti-rotation groove. According to this technical solution, the torque input disc is relatively fixed with the flywheel in the circumferential direction through the cooperation between the transmission teeth and the anti-rotation groove. The transmission teeth of the torque input disc can abut against the side wall of the anti-rotation groove, thereby realizing torque transmission between the torque input disc and the flywheel.

[0031] According to an embodiment of the present disclosure, the transmission tooth has a size capable of passing through between adjacent support protrusions in the axial direction, and the torque input disc can be rotated by an angle in the circumferential direction during assembly so that the transmission tooth is supported on the support protrusions.

[0032] 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. In other words, the elastic member, the torque input plate and the driven plate are clamped between the two bearing plates.

[0033] According to an embodiment of the present disclosure, at least one of the two carrier plates is provided with a transmission hole, and the transmission teeth extend axially from the outer circumference of the torque input plate and can be inserted into the transmission hole, so that the torque input plate is relatively fixed to the flywheel in the circumferential direction. Accordingly, the transmission teeth of the torque input plate cooperate with the transmission hole to realize torque transmission between the torque input plate and the flywheel.

[0034] According to one embodiment of the present disclosure, the flywheel includes a coupling groove arranged on the inner circumference of the main body thereof, and the transmission teeth radially extend from the outer circumference of the torque input disc and can be inserted into the coupling groove, so that the torque input disc is relatively fixed to the flywheel in the circumferential direction. Accordingly, the transmission teeth of the torque input disc cooperate with the coupling groove to realize torque transmission between the torque input disc and the flywheel.

[0035] 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.

[0036] 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.

[0037] The present disclosure also relates to a vehicle, which includes the transmission member as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] 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:

[0039] Figure 1 is a schematic diagram of a transmission assembly according to an embodiment of the present disclosure.

[0040] Figure 2 is an exploded view of a transmission assembly according to one embodiment of the present disclosure.

[0041] Figure 3 is a cross-sectional view of a transmission assembly according to an embodiment of the present disclosure.

[0042] Figure 4 yes Figure 3An enlarged view of a portion of the apparatus showing the torsion limiter in detail.

[0043] Figure 5 Shown in detail Figure 3 Part of the intermediate disk of the torsion limiter in the illustrated embodiment.

[0044] Figure 6 Shows Figure 3 Torque input disc in the embodiment shown.

[0045] Figure 7 It is a schematic diagram of the cooperation between the drive teeth of the torque input plate and the connecting strip of the intermediate plate.

[0046] Figure 8 is a partial cross-sectional view of a torque limiter according to another embodiment of the present disclosure.

[0047] Fig. 9 Shown in detail Figure 8 A portion of a flywheel in the embodiment shown.

[0048] Fig.10 Shows Figure 8 The elastic member of the illustrated embodiment.

[0049] Fig.11 Shows Figure 8 Torque input disc in the embodiment shown.

[0050] Fig.12 is a partial cross-sectional view of a torque limiter according to yet another embodiment of the present disclosure.

[0051] Fig.13 Shows Fig.12 The flywheel in the embodiment shown.

[0052] In the various figures, the same or similar components are denoted by the same reference numerals. DETAILED DESCRIPTION

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] refer to Figure 3 The 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.

[0058] Further references Figure 1 and Figure 2 Combined with Figures 3 to 7 , 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).

[0059] 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 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 A plurality of transmission teeth 11 extending radially outward are arranged on the outer periphery of the torque input disc 10, which can be used to drive the flywheel 60. Fig.11 , which shows a torque input disc 10 consisting of an inner disc 10a and an outer disc 10b fastened together. The outer disc 10b is located radially outside the inner disc 10a, and the drive teeth 11 are located at the outer periphery of the outer disc 10b. The inner disc 10a and the outer disc 10b may have different material properties. For example, the inner disc 10a may be subjected to heat treatment to have a higher strength.

[0060] 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 4 In 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.

[0061] 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 transmission gear 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.

[0062] 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.

[0063] 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 ring 42, thereby eliminating the need to provide a dedicated elastic member.

[0064] exist Figure 4-Figure 7 In the illustrated embodiment, the first axial bearing portion and the second ring 42 of the torsion limiter 100 are provided by the intermediate disc 40. The intermediate disc 40 can also perform the function of transmitting torque from the torque input disc 10 to the flywheel 60, as will be described in detail below.

[0065] refer to Figure 4 and Figure 5, the intermediate disk 40 is integrally formed and includes a first ring 41, a second ring 42 and a plurality of connecting strips 43 connecting the two to each other. The first ring 41 is fastened to the flywheel 60, and includes a ring body 41a and a plurality of first teeth 44. The ring body 41a includes a plurality of through holes evenly distributed. The through holes are used to fasten the first ring 41 to the flywheel 60 by screws (not shown) or the like. The second ring 42 is integrally formed with the first ring 41, and thus rotates together with the first ring 41 around the rotation axis X. The second ring 42 is spaced apart from the first ring 41 by a predetermined distance in the axial direction. In addition, the inner diameter of the ring body 41a of the first ring 41 is larger than the outer diameter of the second ring 42, so that the projection of the main body 41a of the first ring 41 in the axial direction is outside the second ring 42.

[0066] The driven plate 20 is slidably clamped between the second ring 42 and the torque input plate 10 by the elastic member 30 axially arranged between the first ring 41 and the torque input plate 10. The torque input plate 10 and the driven plate 20 are axially located between the first teeth 44 of the first ring 41 and the second ring 42. The first teeth 44 and the second ring 42 constitute two axial bearing parts of the torque limiter 100. Figure 4 In the illustrated embodiment, the first teeth 44 constitute a first axial bearing portion of the torque limiter 100 , and the second ring 42 constitutes a second axial bearing portion of the torque limiter 100 .

[0067] The second ring 42 and the first ring 41 are connected to each other through a plurality of connecting strips 43. Figure 5 , one end of the connecting strip 43 is connected to the radial inner side of the first ring 41, and extends axially to the height of the second ring 42, and is connected to the radial outer side of the second ring 42. The inner diameter of the first ring 41 is greater than the outer diameter of the second ring 42. In the circumferential direction, the multiple connecting strips 43 of the first ring 41 are evenly distributed, and the first tooth 44 is located between two adjacent connecting strips 43 at the inner periphery of the ring body 41a. It is axially spaced a certain distance from the ring body 41a and is connected to the ring body 41a through a bending portion 45 so that it is located on the inner side of the ring body 41a in the radial direction. Before assembling the torque limiter 100, the first tooth 44 can be axially extended from the ring body 41a, and the bending portion 45 is formed by bending the first tooth 44 by a workpiece during the assembly of the torque limiter 100. In this way, the first tooth 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 first tooth 44 and the second ring 42.

[0068] Figure 7The figure shows the cooperation between the torque input disc 10 and the intermediate disc 40. As shown in the figure, in the assembly structure of the torque limiter 100, the transmission teeth 11 of the torque input disc 10 extend radially and are inserted between two adjacent connecting strips 43. In other words, the angular position of the transmission teeth 11 roughly coincides with the first teeth 44. If relative sliding occurs between the torque input disc 10 and the intermediate disc 40, the transmission teeth 11 will abut against the side walls of the connecting strips 43, preventing the torque input disc 10 from sliding further. Therefore, the transmission teeth 11 make the torque input disc 10 relatively fixed to the intermediate disc 40 in the circumferential direction and to the flywheel 60 through the fastening connection between the intermediate disc 40 and the flywheel 60. This also realizes the torque transmission from the torque input disc 10 to the flywheel 60. Figure 7 In the embodiment shown, the width of the transmission tooth 11 is substantially equal to the width of the interval between two adjacent connecting strips 43 to eliminate relative sliding as much as possible. It can be understood by those skilled in the art that the width of the transmission tooth 11 can also be less than the width of the interval between two connecting strips 43.

[0069] 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.

[0070] Figure 4 The intermediate disk 40 shown provides two axial bearing parts of the torque limiter 100 through the first ring 41 and the second ring 42, and enables the torque input disk 10 to drive the flywheel 60 to rotate through the connecting strip 43. It is conceivable that the intermediate disk 40 may have the same Figure 4 For example, the positions of the first ring 41 and the second ring 42 in the axial direction can be reversed, so that the first ring 41 is connected to the flywheel 60 on the axial upper side, the elastic member 30 is supported on the second ring 42, and the driven plate 20 is pressed against the first teeth 44 of the first ring 41. In this case, the second ring 42 constitutes the first axial bearing portion of the torque limiter 100, and the first teeth 44 constitute the second axial bearing portion of the torque limiter 100.

[0071] The intermediate disk 40 may not include the second ring. In this configuration, the connecting strip 43 includes a radially extending section, which is located at the end of the connecting strip 43 away from the first ring 41, so as to be axially spaced a certain distance from the first ring 41. The radially extending sections of the plurality of connecting strips 43 are not connected by a ring body. The torque input disk 10, the elastic member 30 and the driven disk 20 may be clamped between the first teeth 44 and the radially extending section. At this time, the first teeth 44 and the radially extending section respectively constitute the first axial bearing portion and the second axial bearing portion of the torque limiter 100.

[0072] In addition, for the embodiment in which the connecting strip 43 includes a radially extending section, the radial positional relationship between the ring body 41a of the first ring 41 and the first teeth 44 may also be different. That is, the first teeth 44 may be arranged at the outer periphery of the ring body 41a and fastened to the flywheel 60, and the ring body 41a is located radially inside the flywheel 60. For this configuration, the radially extending section of the connecting strip 43 may be formed by bending the connecting strip 43 during the process of assembling the torque limiter 100, so as not to hinder the assembly of the torque input disc 10, the driven disc 20 and / or the elastic member 30 in the axial direction. At this time, the ring body 41a and the radially extending section respectively constitute the first axial bearing portion and the second axial bearing portion of the torque limiter 100.

[0073] The axial bearing portion and torque transmission function of the torque limiter 100 may also be provided by other components, thereby omitting the intermediate disk 40 . Figure 8-Figure 13 A different embodiment of the torque limiter 100 is shown which does not include the intermediate disk 40. The following description will focus mainly on Figure 4-7 Different aspects of the embodiments shown.

[0074] exist Figure 8 In the illustrated embodiment, the flywheel 60 of the torque limiter 100 includes a main body 61, a flange 62 and a support protrusion 63 extending radially inward from the main body 61. Fig. 9 The support protrusion 63 is axially spaced a certain distance from the flange portion 62. The torque input disc 10 and the driven disc 20 are axially arranged between the support protrusion 63 and the flange portion 62. The support protrusion 63 and the flange portion 62 constitute two axial bearing parts of the torque limiter 100. Figure 8 In the illustrated embodiment, the support protrusion 63 constitutes the first axial bearing portion of the torque limiter 100, and the flange portion 62 constitutes the second axial bearing portion of the torque limiter 100. It is conceivable that the flange portion 62 and the support protrusion 63 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 support protrusion 63 constitutes the second axial bearing portion of the torque limiter 100.

[0075] The flywheel 60 may further include a coupling portion directly coupled to the driving teeth 11 of the torque input disc 10 , so that the torque input disc 10 directly transmits torque to the flywheel 60 .

[0076] Specifically, refer to Fig. 9 and Fig.11, the flywheel 60 includes a coupling hole 64 arranged on the flange portion 62. The transmission teeth 11 of the torque input disc 10 extend axially from the outer periphery thereof and can be inserted into the coupling hole 64. If relative sliding occurs between the torque input disc 10 and the flywheel 60, the transmission teeth 11 will abut against the side wall of the coupling hole 64 to prevent further sliding of the torque input disc 10. Therefore, the cooperation between the transmission teeth 11 and the coupling hole 64 makes the torque input disc 10 relatively fixed to the flywheel 60 in the circumferential direction and realizes the torque transmission from the torque input disc 10 to the flywheel 60. The width of the transmission teeth 11 is substantially equal to the width of the coupling hole 64 to eliminate relative sliding as much as possible. Optionally, the width of the transmission teeth 11 can also be smaller than the width of the interval between the coupling holes 64.

[0077] refer to Figure 8-Figure 10 , the elastic member 30 has a plurality of peripheral teeth 31 on its periphery. Each peripheral tooth 31 is supported by a support protrusion 63. An anti-rotation groove 66 is provided on the support protrusion 63. In the assembly structure of the torque limiter 100, the peripheral teeth 31 of the elastic member 30 are pressed against the bottom surface of the anti-rotation groove 66, that is, the bottom surface of the anti-rotation groove 66 provides axial support for the elastic member 30. On the other hand, the anti-rotation groove 66 defines the angular position of the elastic member 30. When relative sliding in the circumferential direction occurs between the elastic member 30 and the first ring 41, the peripheral teeth 31 will abut against the side wall of the anti-rotation groove 66 to prevent excessive sliding of the elastic member 30. In the illustrated example, the width of the anti-rotation groove 66 is substantially equal to the width of the peripheral teeth 31 to eliminate relative sliding as much as possible.

[0078] In order to support the elastic member 30 on the support protrusion 63, the size of the support protrusion 63 needs to be specially designed. Figure 8 In the embodiment of the present invention, the diameter of the torque input disc 10 and the driven disc 20 should be smaller than the diameter corresponding to the radial innermost portion of the support protrusion 63, so that it is suitable for axially passing through the support protrusion 63. The diameter of the main body of the elastic member 30 is also smaller than the diameter corresponding to the radial innermost portion of the support protrusion 63, and its outer peripheral teeth 31 have a size that can pass through between adjacent support protrusions 63 in the axial direction. In this way, during the assembly process of the torque limiter, the angular position of the elastic member 30 is first adjusted so that the outer peripheral teeth 31 correspond to the gap between the support protrusions 63 in the circumferential direction, and then the elastic member 30 is moved in the axial direction. Due to the above-mentioned size setting, the outer peripheral teeth 31 will not be hindered by the support protrusion 63. In this way, the elastic member 30 passes over the support protrusion 63 in the axial direction and abuts against the torque input disc 10. Then, the elastic member 30 can be rotated to adjust the angular position of the elastic member 30 so that the outer peripheral teeth 31 are pressed against the bottom surface of the anti-rotation groove 66.

[0079] In an embodiment not shown, the elastic member 30 may also be supported on the flange portion 62 of the flywheel 60. In this case, the torque input disc 10 may include a plurality of transmission teeth 11 extending radially from its outer circumference. Each transmission tooth 11 is supported by a support protrusion 63, and one of the plurality of transmission teeth 11 is pressed against the bottom surface of the anti-rotation groove 66. When relative sliding in the circumferential direction occurs between the torque input disc 10 and the flywheel 60, the transmission tooth 11 will abut against the side wall of the anti-rotation groove 66 to prevent excessive sliding of the torque input disc 10. Therefore, the cooperation of the transmission tooth 11 and the anti-rotation groove 66 enables the torque input disc 10 to be relatively fixed to the flywheel 60 in the circumferential direction, and realizes the torque transmission from the torque input disc 10 to the flywheel 60. Similarly, the transmission tooth 11 has a size that can pass through between adjacent support protrusions 63 in the axial direction. During assembly, the torque input disc 10 first moves in the axial direction over the supporting protrusion 63 , and then rotates in the circumferential direction by a certain angle, so that the transmission teeth 11 are supported on the supporting protrusion 63 .

[0080] The flywheel 60 of the torque limiter 100 may also not include the support protrusion, and the axial bearing function is provided by the bearing plate 50 fastened to the flywheel 60. Figure 12-13 In the embodiment shown. Fig.12 In the illustrated embodiment, the torque limiter 100 includes a carrier plate 50 fastened to the flywheel 60 and axially spaced a certain distance from the flange portion 62. The torque input plate 10 and the driven plate 20 are axially arranged between the carrier plate 50 and the flange portion 62. The carrier plate 50 and the flange portion 62 constitute two axial bearing portions of the torque limiter 100. Fig.12 In the illustrated embodiment, the bearing plate 50 constitutes the first axial bearing portion of the torque limiter 100, and the flange portion 62 constitutes the second axial bearing portion of the torque limiter 100. It is conceivable that the bearing plate 50 and the flange portion 62 may be reversed in the axial direction, that is, the flange portion 62 constitutes the first axial bearing portion of the torque limiter 100. The bearing plate 50 constitutes the second axial bearing portion of the torque limiter 100. The bearing plate 50 may be an integrally formed annular plate, or may be composed of a plurality of discrete arc-shaped ring segments.

[0081] exist Fig.12 and Fig.13In the illustrated embodiment, the flywheel 60 includes a coupling groove 65 on the inner circumference of the main body 61, and the transmission teeth 11 extend radially from the outer circumference of the torque input disc 10 and can be inserted into the coupling groove 65, so that the torque input disc 10 is relatively fixed to the flywheel 60 in the circumferential direction. If relative sliding occurs between the torque input disc 10 and the flywheel 60, the transmission teeth 11 will abut against the side wall of the coupling groove 65 to prevent further sliding of the torque input disc 10. Therefore, the cooperation between the transmission teeth 11 and the coupling groove 65 makes the torque input disc 10 relatively fixed to the flywheel 60 in the circumferential direction and realizes the torque transmission from the torque input disc 10 to the flywheel 60. The width of the transmission teeth 11 is substantially equal to the width of the coupling groove 65 to eliminate relative sliding as much as possible. Optionally, the width of the transmission teeth 11 can also be smaller than the width of the interval between the coupling holes 64. In an embodiment not shown, a transmission hole may also be provided on the supporting disk 50, and the transmission teeth 11 extend axially from the outer periphery of the torque input disk 10 and can be inserted into the transmission hole, so that the torque input disk 10 is relatively fixed to the flywheel 60 in the circumferential direction, and torque transmission from the torque input disk 10 to the flywheel 60 is realized.

[0082] 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 axial sides 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. The torque transmission between the torque input plate 10 and the flywheel 60 can be achieved by inserting the axially extending transmission teeth 11 into the transmission holes provided on the bearing plate 50, or by inserting the radially extending transmission teeth 11 into the coupling grooves 65 provided on the flywheel 60, which will not be described in detail here.

[0083] Certain features, structures or characteristics in one or more embodiments of the present disclosure may be appropriately combined.

[0084] 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 fixed relative to the flywheel (60) in the circumferential 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) includes a plurality of transmission teeth (11) extending radially outward or axially from an outer periphery thereof, and the torque input disc (10) drives the flywheel (60) via the transmission teeth (11).

4. The torque limiter (100) according to claim 3, characterized in that: The torque input disc (10) comprises an inner disc (10a) and an outer disc (10b) fastened together, the outer disc (10b) being located radially outside the inner disc (10a), and the transmission teeth (11) being located at the outer periphery of the outer disc (10b).

5. 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.

6. 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).

7. The torque limiter (100) according to any one of claims 3 to 6, characterized in that: The torque limiter (100) further comprises an intermediate disk (40), wherein the intermediate disk (40) comprises: a first ring (41), the first ring (41) being firmly connected to the flywheel (60), a plurality of connecting strips (43), the connecting strips (43) being integrally formed with the first ring (41), At least a portion of the connecting strip (43) extends axially, and the driving teeth (11) of the torque input disc (10) can be inserted between two adjacent connecting strips (43).

8. The torque limiter (100) according to claim 7, characterized in that: The first ring (41) comprises a ring body (41a) and a plurality of first teeth (44), each of the first teeth (44) being arranged between two adjacent connecting strips (43) in the circumferential direction.

9. The torque limiter (100) according to claim 8, characterized in that: The ring body (41a) is fastened to the flywheel (60), the first teeth (44) are arranged at the inner periphery of the ring body (41a), and constitute one of the first axial bearing portion or the second axial bearing portion of the torque limiter (100).

10. The torque limiter (100) according to claim 8, characterized in that: The first teeth (44) are arranged at the outer periphery of the ring body (41a) and are fastened to the flywheel (60), and the ring body (41a) constitutes one of the first axial bearing portion or the second axial bearing portion of the torque limiter (100).

11. The torque limiter (100) according to any one of claims 8 to 10, characterized in that: The first tooth (44) is axially spaced a certain distance from the ring body (41a) and is connected to the ring body (41a) via a bent portion (45).

12. The torque limiter (100) according to claim 8 or 9, characterized in that: The intermediate disk (40) further comprises a second ring (42), which is axially spaced a certain distance from the first ring (41) and is formed integrally with the connecting strip (43), and the second ring (42) constitutes the other of the first axial bearing portion and the second axial bearing portion of the torque limiter (100).

13. The torque limiter (100) according to claim 10, characterized in that: The connecting strip (43) comprises a radially extending section which is axially spaced a certain distance from the first ring (41), and the radially extending section constitutes the other of the first axial bearing portion and the second axial bearing portion of the torque limiter (100).

14. The torque limiter (100) according to any one of claims 3 to 6, 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).

15. The torque limiter (100) according to claim 14, characterized in that: The flywheel (60) further comprises a support protrusion (63) extending radially inward from the main body portion (61), the support protrusion (63) being axially spaced a certain distance from the flange portion (62), and the support protrusion (63) constituting the other of the first axial bearing portion or the second axial bearing portion of the torque limiter (100).

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

17. The torque limiter (100) according to any one of claims 14 to 16, characterized in that: The flywheel (60) includes a coupling hole (64) arranged on the flange portion (62), and the transmission tooth (11) extends axially from the outer periphery of the torque input disc (10) and can be inserted into the coupling hole (64), so that the torque input disc (10) is fixed relative to the flywheel (60) in the circumferential direction.

18. The torque limiter (100) according to any one of claims 14 to 16, characterized in that: The flywheel (60) includes a coupling groove (65) arranged on the inner circumference of the main body (61), and the transmission teeth (11) radially extend from the outer circumference of the torque input disc (10) and can be inserted into the coupling groove (65), so that the torque input disc (10) is relatively fixed to the flywheel (60) in the circumferential direction.

19. The torque limiter (100) according to claim 15, characterized in that: At least one of the plurality of supporting protrusions (63) is provided with an anti-rotation groove (66).

20. The torque limiter (100) according to claim 19, characterized in that The elastic member (30) has a plurality of peripheral teeth (31), each peripheral tooth (31) is supported by a supporting protrusion (63), and one peripheral tooth (31) among the plurality of peripheral teeth (31) is pressed against the bottom surface of the anti-rotation groove (66).

21. The torque limiter (100) according to claim 20, characterized in that: The outer peripheral teeth (31) of the elastic member (30) have a size capable of passing through between adjacent support protrusions (63) in the axial direction, and the elastic member (30) can be rotated by an angle in the circumferential direction during assembly so that the outer peripheral teeth (31) are supported on the support protrusions (63).

22. The torque limiter (100) according to claim 15, characterized in that: The transmission teeth (11) radially extend from the outer periphery of the torque input disc (10), each transmission tooth (11) is supported by a support protrusion (63), and one transmission tooth (11) among the plurality of transmission teeth (11) is pressed against the bottom surface of the anti-rotation groove (66).

23. The torque limiter (100) according to claim 22, characterized in that The transmission teeth (11) have a size capable of passing through adjacent support protrusions (63) in the axial direction, and the torque input disc (10) can be rotated by an angle in the circumferential direction during assembly so that the transmission teeth (11) are supported on the support protrusions (63).

24. The torque limiter (100) according to any one of claims 3 to 6, 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).

25. The torque limiter (100) according to claim 24, characterized in that At least one of the two supporting plates (50) is provided with a transmission hole, and the transmission tooth (11) extends axially from the outer periphery of the torque input plate (10) and can be inserted into the transmission hole, so that the torque input plate (10) is fixed relative to the flywheel (60) in the circumferential direction.

26. The torque limiter (100) according to claim 24, characterized in that The flywheel (60) includes a coupling groove (65) arranged on the inner circumference of its main body (61), and the transmission teeth (11) radially extend from the outer circumference of the torque input disc (10) and can be inserted into the coupling groove (65), so that the torque input disc (10) is relatively fixed to the flywheel (60) in the circumferential direction.

27. A transmission assembly (1), characterized in that: The transmission assembly (1) comprises: A torque limiter (100) according to any one of claims 1 to 26, 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).

28. The transmission assembly (1) according to claim 27, 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.

29. A vehicle comprising a transmission assembly (1) according to claim 27 or 28.

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