Torsion-limiting damper assembly

Abstract

The invention provides a torsion-limiting shock absorber assembly, and belongs to the technical field of automobile transmission device structures. According to the torsion-limiting shock absorber assembly, the torsion-limiting assembly and the elastic connecting part are installed in the input rotary disc which is formed into a whole, one side of the input rotary disc is detachably connected with the crankshaft of the engine, and the torsion-limiting assembly is designed to be integrated with a driving unit (an integrated body of a motor box and a gearbox) from the other side of the input rotary disc, so that the manufacturing cost of a product is reduced. The torsion limiting damper assembly is arranged between an engine and a driving unit and comprises an input rotating part, an output rotating part and an elastic connecting part. The input rotating part comprises an integrated input rotating disc, and the output rotating part comprises a torque limiting assembly; one side of the input rotary disc is detachably connected with a crankshaft of the engine; the torque limiting assembly and the elastic connecting part are mounted in the input rotary disc; the torque limiting assembly is integrated with the driving unit from the other side of the input rotary disc.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile transmission device structure, and in particular relates to a torque limiting vibration damper assembly. Background Art

[0002] The applicant discloses a torque-limiting flywheel damper assembly in patent document 1, in which the torque-limiting components of a conventional torque-limiting damper are pressed between a flexible disk and a flywheel. In this way, the flexible disk acts as a pressure cover of the conventional torque-limiting damper, and the flywheel acts as a support disk of the conventional torque-limiting damper. That is to say, the torque-limiting flywheel damper assembly integrates the conventional torque-limiting damper and the flywheel into an integrated structure, omitting the two parts of the pressure cover and the support disk, thereby reducing the number of parts and greatly reducing the production cost. Moreover, the torque-limiting flywheel damper assembly can be fixedly installed on the crankshaft of the engine as a whole, which saves assembly steps compared to separate assembly.

[0003] On the basis of the technical solution recorded in Patent Document 1, the applicant further developed and improved the torque-limiting vibration damper, and obtained a low torsional stiffness torque-limiting flywheel vibration damper assembly recorded in Patent Document 2, wherein the vibration damping spring is in an arc shape. Compared with the linear vibration damping spring in Patent Document 1, a single vibration damping spring has a longer free length a. The longer the free length a of the vibration damping spring is, the longer the vibration damping spring can be compressed. That is, when the installation radius of the vibration damping spring on the disc hub remains unchanged, the vibration damping spring in an arc shape has a larger rotation angle. Since torsional stiffness = transmitted torque ÷ torsional angle, when transmitting the same torque, the larger the torsional angle is, the smaller the torsional stiffness is. It has been proved through a large number of actual vehicle tests and mass production performance in the industry that the lower the torsional stiffness of the vibration damping unit, the better the vibration and noise reduction performance of the hybrid vehicle transmission system.

[0004] With the rapid development of the new energy vehicle industry in recent years, price wars have intensified, and domestic automobile OEMs have also passed on price pressure to suppliers. As one of the suppliers of torque limiter shock absorbers for major domestic automobile OEMs, the applicant needs to further improve the structure of the torque limiter shock absorber in order to adapt to the market and enhance the competitiveness of its products, and reduce the manufacturing cost of the product while ensuring that the functions of the improved torque limiter shock absorber produced are equivalent to the torque limiter flywheel shock absorber assembly recorded in Patent Documents 1 and 2.

[0005] Patent document 1: Chinese invention patent with application publication number CN114838064A, a torque limiting flywheel damper assembly.

[0006] Patent document 2: Chinese utility model patent with authorization announcement number CN218761143U, a low torsional stiffness torque-limiting flywheel damper assembly. Summary of the invention

[0007] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a torque limiting vibration damper assembly, which is used to solve the problem that in order to adapt to the market and improve the competitiveness of the product in the prior art, the structure of the torque limiting vibration damper needs to be further improved, and the manufacturing cost of the product can be reduced while ensuring that the function of the improved torque limiting vibration damper produced is equivalent to the torque limiting flywheel vibration damper assembly recorded in Patent Documents 1 and 2.

[0008] To achieve the above-mentioned and other related purposes, the present invention provides a torque limiting vibration damper assembly, which is arranged between an engine and a drive unit, and includes:

[0009] An input rotating part, driven to rotate by the engine;

[0010] an output rotating part, driven by the input rotating part to rotate and transmit power to the driving unit;

[0011] An elastic connection part, elastically connecting the input rotating part and the output rotating part;

[0012] The input rotating part includes an integral input rotating disc, and the output rotating part includes a torque limiting assembly;

[0013] One side of the input rotary disc is detachably connected to the crankshaft of the engine;

[0014] The torque limiting assembly and the elastic connecting portion are installed in the input rotary disc;

[0015] The torque limiting assembly is integrated with the driving unit from the other side of the input rotary disc.

[0016] Optionally, the input rotary disc comprises a first rotary disc body and a second rotary disc body that are tightly connected, and the torque limiting assembly and the elastic connecting portion are installed between the first rotary disc body and the second rotary disc body;

[0017] The first rotating disk body and the crankshaft of the engine are detachably connected;

[0018] The torque limiting assembly is detachably connected or fixedly connected to the driving unit from one side of the second rotating plate body.

[0019] Optionally, the output rotating portion further comprises an output disc hub circumferentially defined by the torque limiting assembly, and the torque limiting assembly is integrated with the driving unit from the other side of the input rotating disc through the output disc hub.

[0020] Optionally, the torque limiting assembly comprises a separation ring, a first friction ring, a second friction ring and a driven ring which are sequentially stacked in the axial direction;

[0021] The separation ring and the second friction ring are defined in the circumferential direction, the first friction ring and the output disc hub are defined in the circumferential direction, and the driven ring is connected to the input rotating disc through the elastic connection portion.

[0022] Optionally, the torque limiting assembly further includes a pressing member, which axially presses the separation ring, the first friction ring, the second friction ring and the driven ring.

[0023] Optionally, a plurality of “J”-shaped pieces are fixedly connected to the separation ring, a second limiting block is fixedly connected to the second friction disc, and the second limiting block is inserted between the rods of two adjacent “J”-shaped pieces;

[0024] The pressing member is a hook portion of the “J”-shaped member, and the hook portion of the “J”-shaped member abuts against the driven ring.

[0025] Optionally, a limiting groove is provided on the output disc hub, a first limiting block is fixedly connected to the first friction ring, and the first limiting block is inserted into the limiting groove.

[0026] Optionally, the elastic connection portion includes at least two arc springs and at least two torque limiting driving members;

[0027] Each of the arc springs is installed in a spring installation cavity in the input rotary disc, and at least two of the arc springs are evenly arranged along the circumferential direction of the torque limiting assembly;

[0028] One end of each of the torque limiting driving members is fixedly connected to the torque limiting assembly, and the other end is located between the adjacent ends of the two arc springs.

[0029] Optionally, a driving boss is provided between two adjacent spring mounting cavities, and one driving boss corresponds to one torque-limiting driving member.

[0030] Optionally, the driving boss is formed by a recess in the input disc.

[0031] As described above, the torque limiting vibration damper assembly of the present invention has at least the following beneficial effects:

[0032] 1. Compared with the prior art, in which the shock absorber is first installed on the crankshaft of the engine, and then the external spline on the input shaft of the drive unit is meshed with the internal spline on the shock absorber, the torque limiting shock absorber assembly is installed in an integrated input disc through a torque limiting component and an elastic connection part, one side of the input disc is detachably connected to the crankshaft of the engine, and the torque limiting component is integrated with the drive unit (an integrated body of the motor box and the gearbox) from the other side of the input disc, so that the entire torque limiting shock absorber is integrated in the drive unit, and the volume of the integrated drive unit is smaller than the original drive unit and the volume of the shock absorber; at the same time, during the production and assembly process of the automobile main engine factory, the operator completes the work of installing the engine and the drive unit together, that is, the work of installing the engine, the shock absorber and the drive unit together in the prior art is completed, the work of assembling the shock absorber is omitted, and the corresponding labor cost is simultaneously reduced, and the use of workstation equipment and corresponding auxiliary materials is reduced; ultimately, while ensuring that the function of the improved torque limiting shock absorber produced is equivalent to the torque limiting flywheel shock absorber assembly recorded in Patent Documents 1 and 2, the manufacturing cost of the entire vehicle is reduced.

[0033] 2. The torque limiting vibration damper assembly is designed with a specific structure, that is, the first rotating disk body and the second rotating disk body are fastened to form an input rotating disk, and a torque limiting assembly and an elastic connecting part are installed between the two. The torque limiting assembly is composed of a separation ring, a first friction ring, a second friction ring and a driven ring which are stacked in sequence, wherein the separation ring and the second friction ring are limited in the circumferential direction, the first friction ring and the output disk hub are limited in the circumferential direction, and the driven ring is connected to the input rotating disk through the elastic connecting part. The first rotating disk body realizes the functions of the flywheel and the vibration damping disk in patent documents 1 and patent documents 2, and the second rotating disk body realizes the functions of the flexible disk and part of the driven disk in patent documents 1 and patent documents 2 (the function of the other part of the driven disk is realized by the driven ring of the assembly), which reduces two components and reduces the manufacturing cost of the entire torque limiting vibration damper assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Shown is a schematic diagram of a torque limiting vibration damper assembly of the present invention.

[0035] Figure 2 A cross-sectional view of a torque limiting damper assembly of the present invention is shown. Figure 1 .

[0036] Figure 3 A cross-sectional view of a torque limiting damper assembly of the present invention is shown. Figure 2 .

[0037] Figure 4 Shown is an exploded schematic diagram of a torque limiting vibration damper assembly of the present invention.

[0038] Component number description

[0039] Input dial 1;

[0040] A first rotating disk body 11, a second rotating disk body 12, and a driving boss 13;

[0041] Torque limiting component 2;

[0042] Separating ring 21, "J" shaped piece 211;

[0043] A first friction ring 22, a first limiting block 221;

[0044] A second friction ring 23, a second limiting block 231;

[0045] Driven ring 24, torque limiting driving member 241;

[0046] Output disc hub 3, limiting groove 31;

[0047] Arc spring 4. DETAILED DESCRIPTION

[0048] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0049] See also Figures 1 to 4 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0050] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0051] See also Figure 1 The present invention provides a torque limiting vibration damper assembly, which is arranged between the engine and the drive unit. Just like the structural form adopted in the prior art, the torque limiting vibration damper assembly includes:

[0052] The input rotating part is driven to rotate by the engine and is generally connected to the crankshaft of the engine by a spline and then fixed by bolts. The rotation of the crankshaft drives the input rotating part to rotate.

[0053] The output rotating part is driven by the input rotating part to rotate and transmits power to the drive unit. The drive unit of the existing hybrid vehicle has integrated the motor box and the gearbox into one. The output rotating part is generally connected to the input shaft of the gearbox in the drive unit through a spline structure, so as to transmit the power of the engine crankshaft to the gearbox; in addition, the output rotating part is generally equipped with a friction part to realize the torque limiting function of the torque limiting damper assembly, just like the technical solutions recorded in Patent Documents 1 and 2, which will not be elaborated here. The following will introduce a structural form of the input rotating part and the output rotating part that is different from the prior art such as Patent Documents 1 and 2.

[0054] The elastic connecting part is used to elastically connect the input rotating part and the output rotating part. It can adopt the technical solution of a linear damping spring as described in Patent Document 1, or adopt the technical solution of an arc-shaped damping spring as described in Patent Document 2. The difference between the present torque limiting damper assembly and the prior art lies in the coordination between the elastic connecting part and the input rotating part and the output rotating part. This structure will be described in detail below.

[0055] In the above, we have introduced that the torque limiting vibration damper assembly has a structure that is roughly the same as the prior art. In the following, we will introduce the outstanding improvements of the torque limiting vibration damper assembly compared with the prior art.

[0056] like Figure 1 As shown, the input rotating part includes an integrated input disc 1, which integrates the flywheel, flexible disc, damping disc and part of the driven disc in Patent Documents 1 and 2 into an integrated structure, reducing the number of parts of the torque limiting damper assembly and reducing the manufacturing cost of the product; the specific connection structure and connection relationship between the input disc 1 and the output rotating part and the elastic connecting part will be introduced below, and only a general description is given here.

[0057] like Figure 1 and Figure 3 As shown, the output rotating part includes a torque limiting component 2 to realize the torque limiting function of the torque limiting shock absorber assembly.

[0058] like Figure 1 and Figure 4 As shown, one side of the input rotary disc 1 is detachably connected to the crankshaft of the engine; Figure 3 As shown, the torque limiting assembly 2 and the elastic connecting portion are installed in the input rotary disc 1; Figure 2As shown, the torque limiting component 2 is integrated with the drive unit from the other side of the input disc 1; specifically, compared with the prior art, in which the shock absorber is first installed on the crankshaft of the engine, and then the external spline on the input shaft of the drive unit is meshed with the internal spline on the shock absorber, the torque limiting shock absorber assembly of the present invention is installed in the integrated input disc 1 through the torque limiting component 2 and the elastic connection part, one side of the input disc 1 is detachably connected to the crankshaft of the engine, and the torque limiting component 2 is integrated with the drive unit (the integrated body of the motor box and the gearbox) from the other side of the input disc 1, so that the entire torque limiting shock absorber is integrated in the drive unit. The volume of the integrated drive unit is smaller than the sum of the volumes of the original drive unit and the shock absorber; at the same time, during the production and assembly process of the automobile main engine factory, the operator completes the work of installing the engine and the drive unit together, that is, the work of installing the engine, the shock absorber and the drive unit together in the prior art is completed, the work of assembling the shock absorber is omitted, and the corresponding labor cost is simultaneously reduced, and the use of workstation equipment and corresponding auxiliary materials is reduced; ultimately, while ensuring that the function of the improved torque limiting shock absorber produced is equivalent to the torque limiting flywheel shock absorber assembly recorded in Patent Documents 1 and 2, the manufacturing cost of the entire vehicle is reduced.

[0059] At the same time, it should be noted that during the design and production process of this torque limiting vibration damper assembly, it is necessary to connect with the automobile main engine manufacturer, reserve an installation window on the drive unit, that is, the integration of the motor box and the gearbox, and jointly achieve cost reduction through technological iteration and upgrading.

[0060] In another embodiment, see Figure 1 and Figure 3 The input turntable 1 includes a first turntable body 11 and a second turntable body 12 which are fastened together. The fastening connection method may be welding, riveting, etc., which will not be elaborated here. The torque limiting assembly 2 and the elastic connecting part are installed between the first turntable body 11 and the second turntable body 12. The first turntable body 11 and the crankshaft of the engine are detachably connected.

[0061] like Figure 1 As shown, the first rotating disk body 11 and the crankshaft of the engine are connected via a spline structure; the torque limiting assembly 2 is detachably connected or fixedly connected to the drive unit from one side of the second rotating disk body 12. The detachable connection method can be a spline structure or a ring tooth structure, which is convenient for quick disassembly and assembly of the torque limiting shock absorber assembly. The fixed connection can be welding or bolt connection, which will not be elaborated here.

[0062] In another embodiment, see Figure 2The output rotating part also includes an output disc hub 3 circumferentially limited by the torque limiting assembly 2. The torque limiting assembly 2 is integrated with the drive unit from the other side of the input rotating disc 1 through the output disc hub 3. A spline hole is provided in the center of the output disc hub 3, which cooperates with the external spline on the input shaft of the gearbox of the drive unit.

[0063] In another embodiment, see Figure 2 and Figure 4 The torque limiting assembly 2 comprises a separating ring 21, a first friction ring 22, a second friction ring 23 and a driven ring 24 which are sequentially stacked in the axial direction; the separating ring 21 and the second friction ring 23 are limited in the circumferential direction, the first friction ring 22 and the output hub 3 are limited in the circumferential direction, and the driven ring 24 is connected to the input rotating disk 1 through the elastic connecting portion; the present embodiment makes a detailed introduction to the structural form of the torque limiting assembly 2. Generally speaking, the output hub 3 is located at the center of the separating ring 21, the first friction ring 22, the second friction ring 23 and the driven ring 24, that is, the torque limiting assembly 2 is sleeved on the periphery of the output hub 3; designers can also adopt other structural forms, such as designing the outer diameter of the output hub 3 to be larger, designing some hollow structures inside, and the separating ring 21, the first friction ring 22, the second friction ring 23 and the driven ring 24 are installed in the center of the output hub 3. This structural form obviously has higher production and installation costs, which will not be elaborated here.

[0064] The structural design of the torque limiting vibration damper assembly shown in the above three embodiments, that is, the first rotating disk body 11 and the second rotating disk body 12 are fastened to form an input rotating disk 1, and a torque limiting component 2 and an elastic connecting part are installed between the two. The torque limiting component 2 is composed of a separation ring 21, a first friction ring 22, a second friction ring 23 and a driven ring 24 which are stacked in sequence, wherein the separation ring 21 and the second friction ring 23 are limited in the circumferential direction, the first friction ring 22 and the output disk hub 3 are limited in the circumferential direction, and the driven ring 24 is connected to the input rotating disk 1 through an elastic connecting part. Compared with the technical solutions recorded in patent documents 1 and patent document 2, the first rotating disk body 11 realizes the functions of the flywheel and the vibration damping disk, and the second rotating disk body 12 realizes the functions of the flexible disk and part of the driven disk (the function of the other part of the driven disk is realized by the driven ring 24 of the assembly), which reduces two components and reduces the manufacturing cost of the entire torque limiting vibration damper assembly.

[0065] In another embodiment, see Figure 2 and Figure 4The torque limiting assembly 2 also includes a clamping member, which axially clamps the separation ring 21, the first friction ring 22, the second friction ring 23 and the driven ring 24; the clamping member can be designed as an elastic member like the elastic member described in Patent Documents 1 and 2, and the elastic member can be arranged between the separation ring 21 and the first friction ring 22, or between the second friction ring 23 and the driven ring 24, or can be designed as two, which are arranged between the separation ring 21 and the first friction ring 22, and between the second friction ring 23 and the driven ring 24 at the same time. For details, please refer to paragraphs 0060-0062 of the specification of Patent Document 1; in the following implementation method, we will introduce a clamping member structure with a more compact structure and easier installation.

[0066] In another embodiment, see Figure 2 and Figure 4 A plurality of “J”-shaped pieces 211 are fixedly connected to the separation ring 21, a second limiting block 231 is fixedly connected to the second friction disc, and the second limiting block 231 is inserted between the rods of two adjacent “J”-shaped pieces 211, thereby realizing the circumferential limitation between the separation ring 21 and the second friction ring 23.

[0067] like Figure 4 As shown, the clamping member is the hook portion of the "J"-shaped member 211, and the hook portion of the "J"-shaped member 211 abuts against the driven ring 24. Compared with the previous embodiment using an elastic member, the present embodiment directly extends the "J"-shaped member 211 on the separation ring 21, which not only realizes the circumferential limitation between the separation ring 21 and the second friction ring 23, but also realizes the function of the clamping member, making the structure of the torque limiting vibration damper assembly more compact, easier to produce and install, and further reducing the production cost of the assembly.

[0068] In another embodiment, see Figure 4 The output hub 3 is provided with a limiting groove 31, and the first friction ring 22 is fixedly connected with a first limiting block 221, and the first limiting block 221 is inserted into the limiting groove 31, thereby realizing the limitation of the first friction ring 22 and the output hub 3 in the circumferential direction; the specific shape of the limiting groove 31 can be as follows: Figure 4 The rectangular spline groove shown in the figure corresponds to the shape of the first limit block 221, and the rectangular spline groove runs from one end of the output hub 3 to the other end to facilitate the installation of the first friction ring.

[0069] It should be noted that if Figure 2 and Figure 4 As shown, the first friction ring 22 and the second friction ring 23 can be designed to be multiple, and the friction coefficients of the first friction ring 22 and the second friction ring 23 can also be designed to be different values, mainly depending on the overall design parameters of the torque limiting vibration damper, especially the limiting torque.

[0070] It should also be noted that the specific position, specific size and specific number of the “J”-shaped member 211 are also determined according to the overall design parameters of the torque limiting vibration damper.

[0071] In another embodiment, see Figure 3 The elastic connection portion includes at least two arc springs 4 and at least two torque limiting driving members 241; each of the arc springs 4 is installed in the spring installation cavity in the input rotary plate 1, and at least two of the arc springs 4 are evenly arranged along the circumferential direction of the torque limiting assembly 2; one end of each of the torque limiting driving members 241 is fixedly connected to the torque limiting assembly 2, and the other end is located between the adjacent ends of the two arc springs 4; the reason for selecting the arc spring 4 is to obtain a larger free length and enhance the vibration reduction and noise reduction performance of the hybrid vehicle transmission system. For details, please refer to paragraphs 0045-0046 of the specification of patent document 2.

[0072] like Figure 2 and Figure 4 As shown, specifically, the torque limiting driving member 241 can be designed as a torque limiting driving handle extending out of the edge of the driven disk, without adding any new parts.

[0073] In another embodiment, see Figure 4 A driving boss 13 is provided between two adjacent spring mounting cavities, and one driving boss 13 corresponds to one torque limiting driving member 241. When the input rotary disc 1 rotates, the driving boss 13 and the torque limiting driving member 241 press the end of the arc spring 4 together, thereby compressing the arc spring 4 to achieve the vibration reduction function. At the same time, the arc spring 4 transmits the power of the torque limiting driving member 241 to the torque limiting assembly 2; the driving boss 13 here improves the stability of the arc spring 4 during compression, that is, improves the vibration reduction performance of the torque limiting shock absorber assembly.

[0074] In other embodiments, Figure 1 and Figure 4 As shown, the driving boss 13 is formed by the inner recess of the input turntable 1, and the first turntable body 11 and the second turntable body 12 of the input turntable 1 are manufactured by an integral molding method such as casting. Compared with a specially designed driving boss 13, the material loss of the output turntable is saved.

[0075] In addition, for the specific movement connection between the arc spring 4, the input rotary plate 1 and the torque limiting assembly 2, please refer to paragraphs 0049-0050 of the specification of patent document 2.

[0076] As for the technical solution of injecting grease into the spring installation cavity and fixing a slide in the spring installation cavity so that the arc spring 4 and the slide are slidably matched, it has been described in detail in the specification of patent document 2 and will not be repeated here.

[0077] In summary, compared with the prior art, the present invention is designed to first install the shock absorber on the crankshaft of the engine, and then mesh the external spline on the input shaft of the drive unit with the internal spline on the shock absorber. The torque limiting shock absorber assembly is installed in the integrated input disc 1 through the torque limiting component 2 and the elastic connection part. One side of the input disc 1 is detachably connected to the crankshaft of the engine, and the torque limiting component 2 is integrated with the drive unit (the integrated body of the motor box and the gearbox) from the other side of the input disc 1. The design makes the entire torque limiting shock absorber integrated in the drive unit, and the volume of the integrated drive unit is smaller than The sum of the volumes of the original drive unit and the shock absorber; at the same time, during the production and assembly process of the automobile main engine factory, the operator completes the work of installing the engine and the drive unit together, that is, the work of installing the engine, shock absorber and drive unit together in the prior art is completed, eliminating the work of assembling the shock absorber, and simultaneously reducing the corresponding labor costs, reducing the use of workstation equipment and corresponding auxiliary materials; ultimately, while ensuring that the function of the improved torque-limiting shock absorber produced is equivalent to the torque-limiting flywheel shock absorber assembly recorded in Patent Documents 1 and 2, the manufacturing cost of the whole vehicle is reduced. Therefore, the present invention effectively overcomes the shortcomings of the prior art and has a high industrial utilization value.

[0078] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A torque limiting damper assembly, arranged between an engine and a drive unit, comprising: An input rotating part, driven to rotate by the engine; an output rotating part, driven by the input rotating part to rotate and transmit power to the driving unit; An elastic connection part, elastically connecting the input rotating part and the output rotating part; Features: The input rotating part includes an integral input rotating disc, and the output rotating part includes a torque limiting assembly; One side of the input rotary disc is detachably connected to the crankshaft of the engine; The torque limiting assembly and the elastic connecting portion are installed in the input rotary disc; The torque limiting assembly is integrated with the driving unit from the other side of the input rotary disc.

2. A torque limiting vibration damper assembly according to claim 1, characterized in that: The input rotary disc comprises a first rotary disc body and a second rotary disc body which are tightly connected, and the torque limiting assembly and the elastic connecting part are installed between the first rotary disc body and the second rotary disc body; The first rotating disk body and the crankshaft of the engine are detachably connected; The torque limiting assembly is detachably connected or fixedly connected to the driving unit from one side of the second rotating plate body.

3. The torque limiting vibration damper assembly according to claim 1, characterized in that: The output rotating portion further includes an output disc hub circumferentially defined by the torque limiting assembly, and the torque limiting assembly is integrated with the driving unit from the other side of the input rotating disc through the output disc hub.

4. A torque limiting vibration damper assembly according to claim 3, characterized in that: The torque limiting assembly comprises a separation ring, a first friction ring, a second friction ring and a driven ring which are sequentially stacked along the axial direction; The separation ring and the second friction ring are defined in the circumferential direction, the first friction ring and the output disc hub are defined in the circumferential direction, and the driven ring is connected to the input rotating disc through the elastic connection portion.

5. A torque limiting vibration damper assembly according to claim 4, characterized in that: The torque limiting assembly further includes a pressing member, which axially presses the separation ring, the first friction ring, the second friction ring and the driven ring.

6. A torque limiting vibration damper assembly according to claim 5, characterized in that: A plurality of "J"-shaped pieces are fixedly connected to the separation ring, a second limiting block is fixedly connected to the second friction disc, and the second limiting block is inserted between the rods of two adjacent "J"-shaped pieces; The pressing member is a hook portion of the "J"-shaped member, and the hook portion of the "J"-shaped member abuts against the driven ring.

7. The torque limiting vibration damper assembly according to claim 4, characterized in that: The output hub is provided with a limiting groove, the first friction ring is fixedly connected with a first limiting block, and the first limiting block is inserted into the limiting groove.

8. The torque limiting vibration damper assembly according to claim 1, characterized in that: The elastic connection part includes at least two arc springs and at least two torque limiting driving members; Each of the arc springs is installed in a spring installation cavity in the input rotary disc, and at least two of the arc springs are evenly arranged along the circumferential direction of the torque limiting assembly; One end of each of the torque limiting driving members is fixedly connected to the torque limiting assembly, and the other end is located between the adjacent ends of the two arc springs.

9. The torque limiting vibration damper assembly according to claim 8, characterized in that: A driving boss is arranged between two adjacent spring installation cavities, and one driving boss corresponds to one torque-limiting driving member.

10. A torque limiting vibration damper assembly according to claim 9, characterized in that: The driving boss is formed by a recess in the input rotating disc.

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