A dual mass flywheel

Abstract

The present invention relates to the field of mechanical technology, and discloses a dual-mass flywheel, including a torsional vibration damper, a second flywheel and a first flywheel, wherein the torsional vibration damper comprises: a vibration damper body, including an outer ring and an inner ring, wherein the outer ring and the inner ring are respectively connected to the second flywheel and the first flywheel rotating coaxially; a tension pin group, including two tension pin units, wherein the two tension pin units are respectively located on the outer ring and the inner ring; a cable, which is fixed and close to the tension pin group, and the cable is radially distributed along the vibration damper body. The first flywheel of the present invention serves as a power input end, and the second flywheel serves as a power output end, and the torque loaded from the power input end is transmitted to the power output end through the tension pin group and the cable. The present invention has a simple structure, less wear, long service life, low requirements on springs, and reduced cost. With the increase of the torque at the power input end, the torsional stiffness of the present invention also increases positively and continuously, and the vibration reduction effect is enhanced.

Description

Technical Field

[0001] The invention relates to the field of mechanical technology, and in particular to a dual-mass flywheel. Background Art

[0002] Due to the combustion and detonation of the engine, unavoidable torsional vibration is caused during the rotation of the output shaft, which is harmful to the power transmission system and also causes vibration and noise. In order to reduce the torsional vibration, a torsional vibration damper device needs to be added between the engine output shaft and the transmission input shaft.

[0003] When a torsional vibration damper is applied to an engine flywheel, the engine flywheel is called a dual-mass flywheel. The dual-mass flywheel has ample space for arranging the torsional vibration damper. However, the elastic vibration damping element of the existing torsional vibration damper applied to the dual-mass flywheel generally adopts a cylindrical helical compression spring, which is arranged along the circumferential tangential direction of the power transmission shaft. The torsional vibration damper of this structure has contact wear on the outer circle of the spring, is difficult to manufacture, and has a complex structure, which leads to problems such as high cost, high wear and short life of this type of torsional vibration damper. Summary of the invention

[0004] Based on the above, the purpose of the present invention is to provide a dual-mass flywheel that solves the problems of high cost, high wear and short life in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A dual-mass flywheel comprises a torsional vibration damper, a first flywheel and a second flywheel, wherein the torsional vibration damper comprises:

[0007] The shock absorber body comprises an outer ring and an inner ring which are coaxially distributed and can rotate relatively, and the outer ring and the inner ring are connected to the first flywheel and the second flywheel respectively;

[0008] A tension pin group, comprising two tension pin units, wherein the two tension pin units are respectively located on the outer ring and the inner ring;

[0009] A cable is fixed and tightly attached to the tension pin group. The cable is radially distributed along the shock absorber body so that the two tension pin units of each tension pin group are close to each other.

[0010] As a preferred solution for a dual mass flywheel, the cable includes an elastic cable made of elastic material and / or a tension spring cable composed of a tension spring, and the cable is fixed on a group of tension pin groups or the cables of adjacent tension pin groups are connected end to end.

[0011] As a preferred solution of a dual mass flywheel, the cable comprises a tension spring cable composed of a tension spring, and the cable is fixed to a group of tension pin groups.

[0012] As a preferred solution for a dual mass flywheel, the cable includes a rigid cable, the cable is fixed on a group of tension pin groups or the cables of adjacent tension pin groups are connected end to end, the torsional vibration damper also includes a spring and a spring seat for fixing the spring, and the cable is in close contact with the spring seat.

[0013] As a preferred solution of a dual mass flywheel, the cable includes a synchronous belt, the spring seat is provided with a first meshing tooth, the cable is provided with a second meshing tooth meshing with the first meshing tooth, and the spring seat is fixed to the cable.

[0014] As a preferred solution for a dual mass flywheel, the two tension pin units of the tension pin group respectively include two tension pins spaced apart and one tension pin, the cable is located at the periphery of the tension pin group and is close to the tension pin group, and the spring and the spring seat are located between adjacent tension pin groups.

[0015] As a preferred solution of a dual-mass flywheel, the cable includes a flat belt cable, a boss is provided on the spring seat, a through hole is provided on the cable, and the boss passes through the through hole to fix the spring seat on the cable.

[0016] As a preferred solution of a dual-mass flywheel, the cable comprises a rope or a filamentary cable, a groove is provided on the spring seat, the cable is interference fit with the groove, and the spring seat is fixed on the cable.

[0017] As a preferred solution of a dual mass flywheel, the dual mass flywheel also includes two damping plates and a damping spring, the two damping plates are respectively located at the ends of the spring seat and are parallel to the outer ring, and the damping spring is located between the two damping plates so that the damping plate is in close contact with the end of the spring seat.

[0018] As a preferred solution of a dual mass flywheel, the number of the tension pin groups includes at least two, and the at least two tension pin groups are evenly distributed along the circumference of the shock absorber body.

[0019] The beneficial effects of the present invention are as follows: when the dual-mass flywheel is working, the first flywheel serves as the power input end, and the second flywheel serves as the power output end. The present invention has a simple structure, less wear, long service life, low requirements on springs, and reduced costs. The torque loaded from the power input end is transmitted to the power output end through the tension pin group and the cable. When the torque is transmitted, the straight-line distance between the tension pin unit on the inner ring and the tension pin unit on the outer ring increases, and a certain torsion angle is generated between the power input end and the power output end. The ratio of the torque to the torsion angle change is defined as the torsional stiffness. In the present invention, as the torque at the power input end increases, the changes in the torsion angle and the torsional stiffness also increase positively and continuously, and the vibration reduction effect is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0021] Figure 1 is a schematic diagram of a dual mass flywheel according to Example 1 provided in a specific embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of a first variant of the torsional vibration damper of the first embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of a second variation of the torsional vibration damper of the first embodiment of the present invention;

[0024] Figure 4 is a schematic diagram of a dual-mass flywheel according to Example 2 provided in a specific embodiment of the present invention;

[0025] Figure 5 is a comparison diagram of the vibration reduction performance curves of the second embodiment of the present invention and the prior art;

[0026] Figure 6 is a schematic diagram of a first variant of the torsional vibration damper of the second embodiment of the present invention;

[0027] Figure 7 is a schematic diagram of a second variation of the torsional vibration damper of the second embodiment of the present invention;

[0028] Figure 8 It is a schematic diagram of a torsional vibration damper provided by a specific embodiment of the present invention being fixed by a boss;

[0029] Fig. 9 is a schematic diagram of a third variant of the torsional vibration damper of the second embodiment of the present invention;

[0030] Fig.10 is a schematic diagram of a fourth variation of the torsional vibration damper of the second embodiment of the present invention;

[0031] Fig.11 is a schematic diagram of a torsional vibration damper according to a second embodiment of the present invention being fixed by a pressing block and a fastener;

[0032] Fig.12 is a schematic diagram of a fifth variation of the torsional vibration damper of the second embodiment of the present invention;

[0033] Fig.13 It is a schematic diagram of a shock absorber with a damping structure provided in a specific embodiment of the present invention.

[0034] In the figure:

[0035] 1-outer ring, 11-first flywheel, 2-inner ring, 21-second flywheel, 3-tension pin group, 31-outer ring tension pin unit, 32-inner ring tension pin unit, 33-latch pin, 4-cable, 41-through hole, 5-spring seat, 51-spring seat body, 511-groove, 512-second fixing hole, 52-boss, 53-pressing block, 531-first fixing hole, 54-fastener, 6-spring, 71-damping plate, 72-damping spring, 8-bearing, 9-rope hoop. DETAILED DESCRIPTION

[0036] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The present embodiment provides a dual-mass flywheel, including a torsional vibration damper, a first flywheel 11 and a second flywheel 21. The torsional vibration damper includes a vibration damper body, a tension pin group 3 and a cable 4. The vibration damper body includes an outer ring 1 and an inner ring 2 which are coaxially distributed and can rotate relative to each other. The inner ring 2 and the outer ring 1 are respectively connected to the second flywheel 9 and the first flywheel 12.

[0040] The tension pin group 3 of this embodiment includes two tension pin units, namely, an outer ring tension pin unit 31 and an inner ring tension pin unit 32. The number of tension pin groups 3 includes at least two, and at least two tension pin groups 3 are evenly distributed along the circumference of the shock absorber body. The cable 4 is fixed and tightly attached to the tension pin group 3, and the cable 4 is distributed along the radial direction of the shock absorber body, so that the outer ring tension pin unit 31 and the inner ring tension pin unit 32 of each tension pin group 3 are close to each other.

[0041] When the dual-mass flywheel of this embodiment is working, the first flywheel 11 serves as the power input end, and the second flywheel 21 serves as the power output end. This embodiment has a simple structure, less wear, long service life, low requirements on springs, and reduced costs. The torque loaded from the power input end is transmitted to the power output end through the tension pin group 3 and the cable 4. When the torque is transmitted, the straight-line distance between the outer ring tension pin unit 31 and the inner ring tension pin unit 32 of each tension pin group 3 increases, and a certain torsion angle is generated between the power input end and the power output end. The ratio of the torque to the torsion angle change is defined as the torsional stiffness. In the present invention, as the torque at the power input end increases, the changes in the torsion angle and the torsional stiffness also increase positively and continuously, and the vibration reduction effect is enhanced.

[0042] Embodiment 1

[0043] like Figure 1As shown, the first flywheel 11 and the outer ring 1 of this embodiment are integrally formed into a first mass body, the second flywheel 21 and the inner ring 2 are integrally formed into a second mass body, the first mass body and the second mass body are coaxially distributed with a gap in the middle, the outer ring tension pin unit 31 is located on the first mass body and close to one side of the second mass body, the inner ring tension pin unit 32 is located on the second mass body and close to one side of the first mass body, wherein the outer ring tension pin unit 31 and the inner ring tension pin unit 32 each include only one tension pin, the axial length of the tension pin along itself is not greater than the distance between the first mass body and the second mass body, the cable 4 is fixed on the tension pin group 3 and is located in the above-mentioned gap.

[0044] A bearing 8 is also provided inside the second flywheel 21, and the bearing 8 can make the first flywheel 11 and the second flywheel 21 better maintain coaxial rotation. The number of tension pin groups 3 includes twelve groups, and the two tension pin units of each tension pin group 3 are evenly distributed along the radial direction of the shock absorber body. Each tension pin unit includes a tension pin, and the cable 4 of this embodiment includes an elastic cable made of elastic material and / or a tension spring cable composed of a tension spring, and a cable 4 is fixed to a group of tension pin groups 3. Of course, the structure of the torsional vibration damper of this embodiment is not limited to this embodiment, and can also be the following variations.

[0045] First variant of the torsional vibration damper of embodiment 1

[0046] like Figure 2 As shown, the number of tension pin groups 3 in this embodiment includes eight groups, wherein the outer ring tension pin units 31 and the inner ring tension pin units 32 are staggered and evenly distributed, each tension pin unit includes a tension pin, and the cable 4 is an elastic cable made of elastic material, and the cables 4 of adjacent tension pin groups 3 are connected end to end and distributed in a star shape.

[0047] Second variation of the torsional vibration damper of embodiment 1

[0048] like Figure 3 As shown, the number of tension pin groups 3 in this embodiment includes eight groups, and the outer ring tension pin units 31 and the inner ring tension pin units 32 of each tension pin group 3 are evenly distributed along the radial direction of the shock absorber body, that is, the outer ring tension pin units 31 and the inner ring tension pin units 32 of each tension pin group 3 are on the same diameter. Each tension pin unit includes a tension pin, and the cable 4 is a tension spring cable composed of a tension spring, and each tension spring cable has a hook at both ends, which is fixed on the tension pin, and one tension spring is fixed on one tension pin group 3.

[0049] The first embodiment, the first variant and the second variant of the torsional vibration damper described above are all cases where the cable 4 is elastic, and the cable 4 can be modified by modifying the cable 4 itself. However, the cable 4 of the present invention is not limited to being elastic, and can also be a rigid cable.

[0050] Embodiment 2

[0051] The cable 4 of this embodiment is a rigid cable, that is, the cable 4 has no elasticity. According to the different cross-sectional shapes of the cable 4, it can be divided into a flat cable, a rope or a filamentary cable. In order to enable the torsional vibration damper with a rigid cable to also realize the function of converting torque into torsion angle, the torsional vibration damper includes a spring 6 and a spring seat 5 for fixing the spring 6. The spring seat 5 is located on the damper body. Each tension pin group 3 corresponds to two spring seats 5. The two spring seats 5 can move relatively, so that the spring 5 located between the two spring seats 5 can be deformed.

[0052] The cable 4 is in close contact with the spring seat 5, so that the cable 4 of each tension pin group 3 is distributed in a parallelogram along its circumference. This arrangement enables the torsion member damper to work. Compared with the prior art, when the torque of the same magnitude is input from the first flywheel 12, the present application can generate a larger torsion angle, that is, the torsional stiffness of the present application is smaller. Of course, the cable 4 of each tension pin group 3 of the present invention is not limited to being distributed in a parallelogram along its circumference, but can also be a quadrilateral or a triangle, which is arranged according to the actual situation.

[0053] like Figure 4 As shown, the first flywheel 11 and the outer ring 1 of this embodiment are integrally arranged, and the inner ring tension pin unit 32, the second flywheel 21 and the inner ring 2 are integrally arranged. It includes eight tension pin groups 3, the outer ring tension pin unit 31 includes two tension pins, the inner ring tension pin unit 32 includes one tension pin unit, the tension pins located in the inner ring and the outer ring are evenly distributed, the cable 4 includes a synchronous belt, the synchronous belt is a single layer, the two tension pin units of the tension pin group 3 respectively include two tension pins with intervals and one tension pin, the cable 4 is located on the outer periphery of the tension pin group 3 and is close to the tension pin group 3, and the spring 6 and the spring seat 5 are located between adjacent tension pin groups 3. The outer side of the spring seat 5 is provided with a first meshing tooth, the inner side of the cable 4 is provided with a second meshing tooth meshing with the first meshing tooth, and the spring seat 5 is fixed on the cable 4. In this embodiment, the cables 4 of adjacent tension pin groups 3 are connected end to end.

[0054] To further illustrate the effect of this embodiment in detail, after a large number of experiments, the vibration reduction performance curves of the conventional technology and the second embodiment of this application are obtained, as shown in detail. Figure 5 As shown. In the figure, the ordinate a is the torque, the abscissa b is the torsion angle, and A and B are the vibration reduction performance curves of the torsion vibration damper obtained by using the conventional technology and the second embodiment of the present application, respectively. It can be seen from the experimental results that, under the condition of a certain torque, the torsion angle obtained by using the present application is greater than the torsion angle of the conventional solution, that is, when the same torque is provided to the torsion vibration damper of the present application and the conventional solution, the torsion stiffness of the present application is smaller.

[0055] First variant of the torsional vibration damper of the second embodiment

[0056] like Figure 6 As shown, the cable 4 is a flat cable, and each tension pin group 3 includes two cables 4. Each cable 4 can be a single-layer or multi-layer structure. When it is a multi-layer structure, the multi-layer flat cable is stacked together to form a cable 4. Each tension pin unit includes two tension pins with a gap, and the two ends of each cable 4 pass through the gap between the two tension pins, so that the two ends of the cable 4 are bent or bent, so that the cable 4 is fixed to the tension pin unit. When the cable 4 is stretched, the bending or bending shape forms a friction self-locking, thereby forming a connection and fixation.

[0057] The spring 6 and the spring seat 5 of this variant embodiment are located between the two cables 5 of each group, and the cable 4 is fixed to the spring seat 5 through the boss 52, so that the spring seat 5 is fixed to the cable 4. Specifically, Figure 7 As shown, a boss 52 is provided on the spring seat 5 , and a through hole 41 is provided on the flat belt cable. The boss 52 cooperates with the through hole 41 , so that the cable 4 is fixed on the spring seat 5 .

[0058] Second variant of the torsional vibration damper of the second embodiment

[0059] like Figure 8 As shown, the cable 4 is a flat cable, each tension pin group 3 includes two cables 4, each cable 4 can be a single-layer or multi-layer structure, when it is a multi-layer structure, the multi-layer flat cable is stacked together to form a cable 4. The spring 6 and the spring seat 5 of this variant embodiment are located between the two cables 5 of each group.

[0060] The two tension pin units of the tension pin group 3 each include two tension pins with a gap. Two latches 33 are also provided between the two tension pins of the outer ring tension pin unit 31. The two ends of the cable 4 can pass through the gap and be respectively wound around the two latches 33, so that the ends of the cable 4 are in a curved or bent shape, thereby fixing the cable 4 on the tension pin unit. When the cable 4 is stretched, the curved or bent shape forms a friction self-locking, thereby forming a connection and fixation. A latch 33 is also provided between the two tension pins of the inner ring tension pin unit 32. The middle part of the cable 4 can be wound around the latch 33 and respectively close to the outer surfaces of the two tension pins located in the inner ring tension pin unit 32.

[0061] The third variant of the torsional vibration damper of the second embodiment

[0062] like Fig. 9As shown, the cable 4 is a rope or a filamentary cable. The cable 4 can be a single or multiple structure. When there are multiple ropes or filamentary cables, the multiple ropes or filamentary cables are arranged in parallel or twisted together. The cable 4 of this embodiment is a structure of two parallel cables. The spring 6 and the spring seat 5 of this variant embodiment are located between the two cables 5 of each group. Rope hoops 9 are provided on the inner ring 2 and the outer ring 1, and the ends of the cable 4 are fixed on the rope hoops 9.

[0063] like Fig.10 As shown, the spring seat 5 includes a spring seat body 51, a pressure block 53 and a fastener 54. The spring seat body 51 is provided with a groove 511, and the cable 4 can be relatively fixed in the groove 511. The pressure block 53 is provided with a first fixing hole 531, and the spring seat body 51 is provided with a second fixing hole 512. The fastener 54 passes through the first fixing hole 531 to the second fixing hole 512, thereby fixing the cable 4 between the spring seat body 51 and the pressure block 53.

[0064] The fourth type of the torsional vibration damper of the second embodiment

[0065] The cable 4 is a rope or a filament cable, and a rope hoop 9 is provided on both the inner ring 2 and the outer ring 1, and the end of the cable 4 is fixed on the rope hoop 9. The rope (filament) can be a single strand or a multi-strand twisted structure with multiple strands arranged in parallel. Fig.11 As shown, the cables 4 are four parallel structures, and the spring seat 5 is provided with four slots. Each cable 4 is interference fit with a slot, so that the cable 4 is fixed on the spring seat 5.

[0066] Of course, the variations of the torsional vibration damper of the present invention are not limited to the above-mentioned cases provided in this embodiment, and may also be other cases. For example, the cable 4 is in the shape of a flat belt with a protrusion on the surface in contact with the spring seat 5, and the spring seat 5 has a groove 511 used in conjunction with the protrusion. When the dual-mass flywheel is working, the protrusion is engaged in the groove 511 to fix the cable 4 on the spring seat 5.

[0067] Fifth variation of the torsional vibration damper of the second embodiment

[0068] like Fig.12 As shown, the cable 4 is a flat-belt cable, and the two tension pin units of the tension pin group 3 respectively include two tension pins with gaps and one tension pin, and there is a gap between adjacent tension pin units including one tension pin. The cable 4 passes through the above gap and is bent or folded, so that the cable 4 is fixed on the tension pin unit.

[0069] The first flywheel 11 and the outer ring 1 are integrally arranged, and the inner ring tension pin unit 32, the second flywheel 21 and the inner ring 2 are integrally arranged. It includes eight tension pin groups 3, the outer ring tension pin unit 31 includes two tension pins, the inner ring tension pin unit 32 includes one tension pin unit, the tension pins located in the inner ring and the outer ring are evenly distributed, there is a gap between the adjacent tension pins located in the inner ring, and there is also a gap between the two tension pins of the outer ring tension pin unit 31, and the two ends of the flat belt cable can pass through the above gaps respectively, so that the flat belt cable is fixed on the tension pin group 3, and the cable 4 is close to the pin 33 and the spring seat body 51, so that the cable 4 is fixed on the tension pin group 3. This embodiment has a simple structure and a good vibration reduction effect.

[0070] like Fig.13 As shown, the second embodiment also includes a damping structure, which includes two damping plates 71 and a damping spring 72. The two damping plates 71 are respectively located at the ends of the spring seat 5 and are parallel to the outer ring 1. The damping spring 72 is located between the two damping plates 71, so that the damping plate 71 is in close contact with the end of the spring seat 5. Of course, when the cable 4 of the present invention is a rigid cable, the damping structure can be set or not, which is determined according to actual needs.

[0071] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A dual mass flywheel, comprising a torsional vibration damper, a first flywheel (11) and a second flywheel (21), characterized in that: The torsional vibration damper comprises: The damper body comprises an outer ring (1) and an inner ring (2) which are coaxially arranged and can rotate relative to each other, the outer ring (1) and the inner ring (2) are respectively connected to a first flywheel (11) and a second flywheel (21), the first flywheel (11) and the outer ring (1) are integrally formed into a first mass body, the second flywheel (21) and the inner ring (2) are integrally formed into a second mass body, the first mass body and the second mass body are coaxially arranged with a gap therebetween; A tension pin group (3), comprising two tension pin units, wherein the two tension pin units are respectively located on the outer ring (1) and the inner ring (2); A cable (4) fixed to and in close contact with the tension pin group (3), wherein the cable (4) is distributed radially along the shock absorber body so that the two tension pin units of each tension pin group (3) are close to each other; The cable (4) comprises a rigid cable, the cable (4) is fixed on a group of the tension pin groups (3) or the cables (4) of adjacent tension pin groups (3) are connected end to end, the torsional vibration damper further comprises a spring (6) and a spring seat (5) for fixing the spring (6), the cable (4) is in close contact with the spring seat (5); The dual mass flywheel further comprises two damping plates (71) and a damping spring (72); the two damping plates (71) are respectively located at the ends of the spring seat (5) and are parallel to the outer ring (1); the damping spring (72) is located between the two damping plates (71) so that the damping plate (71) is in close contact with the end of the spring seat (5).

2. The dual mass flywheel according to claim 1, characterized in that The cable (4) comprises a synchronous belt, the spring seat (5) is provided with a first meshing tooth, the cable (4) is provided with a second meshing tooth meshing with the first meshing tooth, and the spring seat (5) is fixed on the cable (4).

3. The dual mass flywheel according to claim 1, characterized in that The two tension pin units of the tension pin group (3) respectively include two tension pins spaced apart and one tension pin, the tension cable (4) is located on the periphery of the tension pin group and is closely attached to the tension pin group, and the spring (6) and the spring seat (5) are located between adjacent tension pin groups.

4. The dual mass flywheel according to claim 1, characterized in that The cable (4) comprises a flat cable, the spring seat (5) is provided with a boss (52), the cable (4) is provided with a through hole (41), and the boss (52) passes through the through hole (41) so that the spring seat (5) is fixed to the cable (4).

5. The dual mass flywheel according to claim 1, characterized in that The cable (4) comprises a rope or a filamentary cable, and a slot is provided on the spring seat (5). The cable (4) and the slot are interference-fitted, so that the spring seat (5) is fixed on the cable (4).

6. The dual mass flywheel according to any one of claims 1 to 5, characterized in that The number of the tension pin groups (3) includes at least two, and at least two of the tension pin groups (3) are evenly distributed along the circumference of the shock absorber body.

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