Torsion damper

Abstract

The utility model provides a torsion damper which comprises a torsion limiting module, and the torsion limiting module comprises a cover plate, a first friction plate, a friction plate, a second friction plate, a pressing plate and a first disc spring which are sequentially arranged in the axial direction. The first disc spring is buckled and connected with the cover plate so as to limit the first friction plate, the friction plate, the second friction plate and the pressing plate in the axial direction; the clamping module comprises a first clamping plate installed on the side of a gearbox and a second clamping plate installed on the side of an engine flywheel, and the first clamping plate and the second clamping plate are connected to the two sides of the friction plate in a fastened mode in the axial direction; the driving disc is clamped between the first clamping plate and the second clamping plate in the axis direction; the internal spline is in transmission connection with the driving disc; and the vibration reduction module is used for connecting the clamping module and the driving disc. According to the torsion damper provided by the utility model, the material cost can be effectively reduced on the premise of normally reducing the torsion vibration.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts, and particularly relates to a torsional vibration damper. Background Art

[0002] Torsional vibration dampers are usually used in extended-range, hybrid passenger cars or commercial vehicles. They are usually arranged between the engine output end and the extended-range or hybrid transmission. Their main functions are to transmit torsional torque, reduce torsional vibration, limit the maximum transmitted torque to protect against overload, and improve the NVH (Noise, Vibration, Harshness) of the vehicle power system.

[0003] During the engine startup and operation, the engine and the range extender or hybrid transmission will generate torsional vibrations. The torsional vibration damper arranged between the engine and the transmission will play a role in attenuating the torsional vibrations of the engine or transmission system. In some special cases, when the torque is too large, the torque limit module of the torsional vibration damper will generate friction to filter the large torque and play a role in overload protection.

[0004] With the development of the domestic new energy vehicle market, OEMs have put forward more stringent requirements on the performance and price of torsional vibration dampers. According to the requirements of different powertrain configurations, there are different requirements for the torque limit value of the torsional vibration damper's torque limit module, the stiffness and torsion angle of the vibration isolation module, the damping form of the damping module (single damping, large and small damping, asymmetric damping) and the damping size. However, how to develop a torsional vibration damper with a low-cost solution while meeting these performance requirements has always been a work worth studying. Utility Model Content

[0005] In view of the above problems existing in the prior art, the main purpose of the utility model is to provide a torsional vibration damper. The provided torsional vibration damper can effectively reduce material costs while ensuring normal reduction of torsional vibration.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] The utility model provides a torsional vibration damper, which comprises:

[0008] The torque limiting module comprises a cover plate, a first friction plate, a friction plate, a second friction plate, a pressure plate and a first disc spring which are sequentially arranged along the axial direction, wherein the first disc spring is buckled and connected with the cover plate to limit the positions of the first friction plate, the friction plate, the second friction plate and the pressure plate in the axial direction;

[0009] A clamping module, the clamping module comprising a first clamping plate for installation on the gearbox side and a second clamping plate installed on the engine flywheel side, the first clamping plate and the second clamping plate being axially fastened to both sides of the friction plate;

[0010] A driving disk, wherein the driving disk is clamped between the first clamping plate and the second clamping plate along an axial direction;

[0011] An internal spline, the internal spline being drivingly connected to the driving disc;

[0012] A vibration reduction module is used to connect the clamping module and the driving disk.

[0013] As a further description of the above technical solution, the cover plate includes a cover body and a plurality of folded ear portions, each of the folded ear portions is connected to an end of the cover body axially adjacent to the first disc spring, and the first disc spring axially abuts between the pressure plate and the folded ear portion.

[0014] As a further description of the above technical solution, the cover body includes a first plate body and a second plate body arranged in parallel along the axial direction, and a skirt portion connecting the first plate body and the second plate body along the axial direction; wherein,

[0015] An end surface of the first plate body facing the first friction plate in the axial direction abuts against the first friction plate;

[0016] The second plate body is located at the outer periphery of the first plate body in the radial direction;

[0017] The plurality of folded ear portions are formed by bending the skirt portion from an end thereof adjacent to the first plate body to an end thereof away from the first plate body.

[0018] As a further description of the above technical solution, a plurality of first convex portions are provided on the end surface of the first plate body facing the first friction plate along the circumferential direction, and a plurality of first concave portions are provided on the end surface of the first friction plate facing the cover plate along the circumferential direction;

[0019] The plate surface of the pressure plate facing the second friction plate is provided with a plurality of second protrusions along the circumferential direction, and the end surface of the second friction plate facing the pressure plate is provided with a plurality of second recesses along the circumferential direction;

[0020] Each of the first protrusions is interference-fitted into a corresponding first recess;

[0021] Each of the second protrusions is interference-fitted in a corresponding second recess.

[0022] As a further description of the above technical solution, the first clamping plate and the second clamping plate are both provided with holes matching the vibration reduction module, and the two ends of the vibration reduction module are respectively abutted against the inner walls of the holes of the two clamping plates along the circumferential direction.

[0023] As a further description of the above technical solution, the driving disk includes a disk body and a plurality of extensions formed radially outward from the outer edge of the disk body, the plurality of extensions are circumferentially spaced apart from the vibration damping module, and the two ends of the vibration damping module are respectively circumferentially abutted against two adjacent extensions.

[0024] As a further description of the above technical solution, the first clamping plate includes a plurality of first riveted portions which are arranged one by one in the radial direction at the middle of the outer edge of the hole; the second clamping plate includes a plurality of second riveted portions which are arranged one by one in the radial direction at the middle of the outer edge of the hole; the inner edge of the friction plate protrudes radially inwardly with a plurality of third riveted portions;

[0025] The first riveted portions, the third riveted portions, and the second riveted portions are aligned and matched along the axial direction to form a plurality of limiting portions arranged along the circumferential direction, and the end of each of the extending portions is correspondingly limited between two adjacent limiting portions.

[0026] As a further description of the above technical solution, the multiple riveted portions of the first clamping plate are all formed by the first clamping plate protruding outwardly toward the plate surface of the second clamping plate, and the multiple riveted portions of the second clamping plate are all formed by the second clamping plate protruding outwardly toward the plate surface of the first clamping plate.

[0027] As a further description of the above technical solution,

[0028] It also includes a damping module, which includes a first damping plate, a second damping plate, a third damping plate and a fourth damping plate; a flange is provided at the connection between the internal spline and the driving plate; wherein,

[0029] The first damping plate is key-connected to the first clamping plate. In the axial direction, the side of the flange of the internal spline facing the first damping plate and the disk surface of the driving plate facing the first damping plate both abut against the side of the first damping plate away from the first clamping plate. In the radial direction, the first damping plate has a portion abutting against the first clamping plate and the main body of the internal spline.

[0030] The second damping plate is key-connected to the driving disk, the third damping plate is key-connected to the second clamping plate, and a side of the second damping plate axially away from the driving disk abuts against a side of the third damping plate axially away from the second clamping plate;

[0031] The fourth damping plate is axially abutted between a side of the flange facing the second clamping plate and the second clamping plate.

[0032] As a further description of the above technical solution, the main body of the third damping plate is in contact with the second clamping plate via a second disc spring;

[0033] The main body of the fourth damping plate is in contact with the second clamping plate via a third disc spring.

[0034] By means of the above technical solution, the outstanding effects of the utility model are:

[0035] 1. In the torsional vibration damper provided by the utility model, the driving disc connected with the internal spline transmission is still clamped between the two clamping plates of the clamping module along the axial direction. The vibration damping module is used to connect the clamping module and the driving disc, but the first disc spring and the cover plate in the torque limiting module are connected by snapping, which can directly limit the axial limit position of the first friction plate, friction plate, second friction plate and pressure plate arranged between the two in sequence, without the need to use two cover plates to snap together and connect with rivet materials to limit the axial limit position of other components in the torque limiting module. Therefore, one cover plate material and multiple rivet materials used to connect the two cover plates of the traditional upper and lower double cover plate structure of the torsional vibration damper are reduced, thereby reducing the material cost by at least 15%; at the same time, the clamping module of the torsional vibration damper includes a first clamping plate for installation on the gearbox side and a second clamping plate installed on the engine flywheel side, which are directly fastened and connected to the axial sides of the friction plate, making the connection between the two clamping plates more stable. Therefore, the overall torsional vibration damper effectively reduces the material cost under the premise of ensuring the normal reduction of torsional vibration;

[0036] 2. In the torsional vibration damper provided by the utility model, the first friction plate and the cover plate, as well as the second friction plate and the pressure plate, are both fitted with concave and convex parts to achieve the fixation of the friction plates, without the need to use rivets to fix the two friction plates separately;

[0037] 3. In the torsional vibration damper provided by the utility model, the riveted parts correspondingly arranged on the first clamping plate, the second clamping plate and the friction plate are assembled in groups along the axial direction using flat head rivets, which ensures that the connection between the two clamping plates is more stable after assembly; at the same time, the multiple groups of riveted parts correspondingly assembled along the axial direction form multiple limiting parts along the circumferential direction, so that the end of each extension part of the driving disk is correspondingly limited between two adjacent limiting parts, thereby realizing the contact limiting function with the driving disk, without the need to set additional limiting rivet materials, and also reducing material costs;

[0038] 4. The integrated first damping plate combines the internal spline damping plate and the drive disk damping plate in the prior art into one, isolating the first clamping plate from the internal spline and the drive disk to reduce the resonance between them and reduce the material cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is an exploded schematic diagram of a torsional vibration damper in an embodiment of the utility model;

[0040] Figure 2 An axial cross-sectional view of a torsional vibration damper in an embodiment of the utility model;

[0041] Figure 3 A partial axial cross-sectional view of the torsional vibration damper in the embodiment of the utility model;

[0042] Figure 4 It is another partial axial cross-sectional view of the torsional vibration damper in the embodiment of the utility model;

[0043] Figure 5 This is a schematic diagram of the structure when the cover plate and the first disc spring are not fastened together in the embodiment of the utility model;

[0044] Figure 6 It is a schematic diagram of the structure after the cover plate and the first disc spring are buckled and connected in the embodiment of the utility model;

[0045] Figure 7 It is a schematic diagram of a partially dissected structure of the torsional vibration damper on the second clamping plate side in an embodiment of the utility model;

[0046] Figure 8 It is a schematic structural diagram of the second clamping plate in the embodiment of the utility model.

[0047] Description of Figure Numbers:

[0048] 11. Cover plate; 111. Ear portion; 112. First plate body; 113. Second plate body; 114. Skirt; 115. First convex portion; 12. First friction plate; 121. First concave portion; 13. Friction plate; 131. Third riveted portion; 14. Second friction plate; 141. Second concave portion; 15. Press plate; 151. Second convex portion; 16. First disc spring; 21. First clamping plate; 211. First riveted portion; 22. Second clamping plate; 221. Second riveted portion; 3. Drive disc; 31. Disc body; 32. Extension portion; 4. Internal spline; 41. Flange; 5. Damping module; 6. Hole; 71. First damping plate; 72. Second damping plate; 73. Third damping plate; 74. Fourth damping plate; 75. Second disc spring; 76. Third disc spring; 8. Flat head rivet. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inside", "outside", "front", "back", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0051] See also Figures 1 to 8 The utility model discloses a torsional vibration damper, which comprises:

[0052] The torque limiting module includes a cover plate 11, a first friction plate 12, a friction plate 13, a second friction plate 14, a pressure plate 15 and a first disc spring 16 which are sequentially arranged along the axial direction. The first disc spring 16 is buckled and connected with the cover plate 11 to limit the positions of the first friction plate 12, the friction plate 13, the second friction plate 14 and the pressure plate 15 in the axial direction.

[0053] A clamping module, the clamping module comprising a first clamping plate 21 for mounting on the gearbox side and a second clamping plate 22 mounted on the engine flywheel side, the first clamping plate 21 and the second clamping plate 22 being axially fastened to both sides of the friction plate 13;

[0054] A driving disk 3, wherein the driving disk 3 is clamped between the first clamping plate 21 and the second clamping plate 22 along an axial direction;

[0055] An internal spline 4, wherein the internal spline 4 is drivingly connected to the driving disc 3;

[0056] The vibration reduction module 5 is used to connect the clamping module and the driving disc 3 .

[0057] In the above-mentioned structural setting, the drive plate 3 of the torsional vibration damper that is transmission-connected to the internal spline 4 is still clamped between the two clamping plates of the clamping module in the axial direction, and the vibration damping module 5 is still used to connect the clamping module and the drive plate 3, but the first disc spring 16 in the torque limiting module is connected to the cover plate 11 by a snap-fit ​​connection, so that the first friction plate 12, the friction plate 13, the second friction plate 14 and the pressure plate 15 sequentially arranged therebetween can be directly limited in the axial direction without using two cover plates 11 to be relatively snap-fitted and connected by rivet materials to limit the axial direction of other components in the torque limiting module, thereby reducing the material of one cover plate 11 of the torsional vibration damper of the traditional upper and lower double cover plate structure and the multiple rivet materials used to connect the two cover plates 11, thereby reducing the material cost by at least 15%; at the same time, the clamping module of the torsional vibration damper includes a first clamping plate 21 for installation on the gearbox side and a second clamping plate 22 installed on the engine flywheel side, which are directly fastened and connected to the axial sides of the friction plate 13, so that the connection between the two clamping plates is more stable. Therefore, the overall torsional vibration damper effectively reduces material costs while ensuring normal reduction of torsional vibration.

[0058] See also Figures 1 to 7 Specifically, in this embodiment, the cover plate 11 includes a cover body 111 and 8 folded ear portions 111, each of the folded ear portions 111 is connected to one end of the cover body axially adjacent to the first disc spring 16, so as to cooperate with the pressure plate 15 and can abut against both sides of the first disc spring 16 in the axial direction. More specifically, the cover body includes a first plate body 112 and a second plate body 113 which are arranged in parallel along the axial direction, and a skirt body 114 which connects the first plate body 112 and the second plate body 113 along the axial direction; wherein, the end surface of the first plate body 112 axially facing the first friction plate 12 abuts against the end surface of the first friction plate 12 facing the first plate body 112; and the second plate body 113 is located at the outer periphery of the first plate body 112 in the radial direction, so that one end of the skirt body 114 is connected to the outer peripheral edge of the first plate body 112, and the other end is connected to the inner peripheral edge of the second plate body 113, and the plurality of folded ear portions 111 are formed by bending the skirt body 114 from one end adjacent to the first plate body 112 to the end away from the first plate body 112. It should be understood that after the multiple folding ears 111 are initially bent and formed, it should be convenient to place other components in the torque limiting module (the components other than the torque limiting module can be assembled in sequence according to actual needs, for example, the first clamping plate 21 and the second clamping plate 22 can be fastened to the friction plate 13 first, and then the friction plate 13 can be placed in the inner periphery of the cover plate 11) into the inner periphery of the cover plate 11 and install them in place, just like Figure 5As shown, each of the folding ears 111 extends axially outward of the cover body of the cover plate 11. Afterwards, the 8 folding ears 111 protruding from the cover body of the cover plate 11 can be pressed from the outside to the inside by means of an external force (such as a press machine), so that the 8 folding ears 111 protruding from the cover body of the cover plate 11 are bent and deformed concentrically inward to press against the first disc spring 16, so that the first disc spring 16 is axially abutted between the pressure plate 15 and the 8 folding ears 111, so that the first disc spring 16 can reach a preset working height and generate a set range of positive pressure on the pressure plate 15, the two friction plates and the metal friction plate 13 clamped between it and the cover plate 11. Of course, in other embodiments, the folding ears 111 can also be set to other numbers. It should be understood that the degree of bending caused by the folding ears 111 buckling against the first disc spring 16 is determined by the actual positive pressure value required to be generated by the first disc spring 16. Preferably, each of the folding ears 111 is integrally formed with the cover body.

[0059] See also Figures 2 to 4 Specifically, in this embodiment, the end surface of the first plate body 112 facing the first friction plate 12 is provided with a plurality of first protrusions 115 along the circumferential direction, and the end surface of the first friction plate 12 facing the cover plate 11 is provided with a plurality of first recesses 121 along the circumferential direction, and each of the first protrusions 115 is correspondingly interference-fitted in one of the first recesses 121, so that the cover plate 11 and the first friction plate 12 are correspondingly assembled as a whole; at the same time, the plate surface of the pressure plate 15 facing the second friction plate 14 is provided with a plurality of second protrusions 151 along the circumferential direction, and the end surface of the second friction plate 14 facing the pressure plate 15 is provided with a plurality of second recesses 141 along the circumferential direction, and each of the second protrusions 151 is correspondingly interference-fitted in one of the second recesses 141, so that the pressure plate 15 and the second friction plate 14 are also correspondingly assembled as a whole. Thus, the rivet material required for fixing the friction plate is reduced. Specifically, in the present embodiment, the cross-sectional shapes of the two concave portions and the two convex portions are both adapted circles. Of course, in other embodiments, the cross-sectional shapes may also be other shapes, such as square.

[0060] See also Figure 1 ,as well as Figures 5 to 7Specifically, in this embodiment, there are four vibration damping modules 5, each of which is composed of a spring group and spring seats mounted at both ends of the spring group. The first clamping plate 21 and the second clamping plate 22 are both provided with four holes 6 matching the four vibration damping modules 5 along the circumferential direction. When each vibration damping module 5 is correspondingly installed in each hole 6, its two ends are respectively abutted against the inner walls of the holes 6 of the two clamping plates along the circumferential direction. The driving disk 3 includes a disk body 31, and the disk body 31 is provided with a central opening, and the central opening is meshed with the meshing teeth on the outer periphery of the internal spline 4 through a tooth shape. The driving disk 3 also includes four extensions 32 formed radially outward from the outer edge of its disk body 31, and the four extensions 32 are spaced apart from the four vibration damping modules 5 along the circumferential direction, and the two ends of each vibration damping module 5 are also abutted against the middle side walls of two adjacent extensions 32 in the circumferential direction. Therefore, after the assembly is completed, the two ends of each of the vibration damping modules 5 are simultaneously abutted against the inner walls of the holes 6 of the first clamping plates 21 and the second clamping plates 22 and the middle side walls of the extension portion 32 included in the driving disk 3 in the circumferential direction, that is, the first clamping plates 21, the second clamping plates 22 and the driving disk 3 together constitute a mounting position for installing the vibration damping module 5.

[0061] Specifically, in this embodiment, the first clamping plate 21 is provided with four first riveted portions 211, and the four first riveted portions 211 are uniformly and one-to-one arranged at the outer edges of the four holes 6 provided on the first clamping plate 21 in the radial direction, and are uniformly and one-to-one located between the two ends of the four holes 6 in the circumferential direction; the second clamping plate 22 is provided with four second riveted portions 221, and the four second riveted portions 221 are uniformly and one-to-one arranged at the outer edges of the four holes 6 provided on the second clamping plate 22 in the radial direction, and are uniformly and one-to-one located between the two ends of the four holes 6 in the circumferential direction, and the inner edge of the friction plate 13 is protruded radially inwardly with four third riveted portions 131. When the first clamping plate 2 is assembled, 1, the second clamping plate 22 and the friction plate 13, the first riveted portion 211, the third riveted portion 131 and the second riveted portion 221 are aligned in the axial direction, and the three can be fastened and connected by fasteners (for example, flat head rivets 8 are used for riveting. The advantage of using flat head rivets 8 to rivet the two clamping plates and the friction plate 13 is that the axial ends thereof do not protrude from the plate surfaces of the two clamping plates, making the structure of the torsional vibration damper more compact), so that the four groups of the first riveted portions 211, the third riveted portions 131 and the second riveted portions 221 aligned in the axial direction constitute four limiting portions arranged in the circumferential direction, so that the end of each extension portion 32 of the drive disk 3 is correspondingly limited between two adjacent limiting portions. Preferably, the four limiting portions are arranged equidistantly in the circumferential direction. The two clamping plates and the friction plate 13 are directly connected by setting a riveted part, so that the two clamping plates are more stable. At the same time, a set of three riveted parts corresponding to the limiting part in the axial direction can also contact the drive disk 3 to realize the limiting function, and no additional limiting rivet material is required to limit the drive disk 3, which also reduces the material cost. Furthermore, the multiple first riveted parts 211 of the first clamping plate 21 are all formed by the first clamping plate 21 protruding toward the plate surface of the second clamping plate 22, and the multiple second riveted parts 221 of the second clamping plate 22 are all formed by the second clamping plate 22 protruding toward the plate surface of the first clamping plate 21. Therefore, the space formed by the two clamping plates except the corresponding riveted parts can be used to accommodate the extension part 32 of the drive disk 3.

[0062] Therefore, when the torque value does not exceed the upper limit, during the process of the internal spline 4 and the drive disc 3 teeth meshing and rotating relative to the cover plate 11, the four extensions 32 of the drive disc 3 will squeeze the corresponding vibration reduction module 5 along its rotation direction and rotate at a certain angle. Under the reaction force of the vibration reduction module 5, the end of the extension 32 of the drive disc 3 will not eventually abut against the front limit portion along the rotation direction of the drive disc 3, but will rotate in the opposite direction at a certain angle to squeeze the vibration reduction module 5 abutting on the rear side, and the vibration reduction module 5 on the rear side will also apply a reaction force to it, so that it will not continue to rotate in the opposite direction and abut against the limit portion on the rear side. Therefore, the four vibration reduction modules 5 can effectively isolate the internal spline 4 from the rear spline 4. key 4 and torsional vibration between the driving plate 3 and the two clamping plates; and under the action of a large torque exceeding the torque limit value, during the process of the teeth of the internal spline 4 and the driving plate 3 meshing and rotating together, the extension portion 32 of the driving plate 3 squeezes the front side of the vibration damping module 5 corresponding to it along its rotation direction, and the reaction force applied by the vibration damping module 5 to it is not enough to offset the squeezing force it receives, so the driving plate 3 will continue to rotate in the same direction, and then abut against the limiting portion and rotate together with the two clamping plates, so that the friction plate 13 fastened to the two clamping plates will slide relative to the friction plates on both sides thereof, so as to reduce the torsional vibration transmitted to the friction plate and the cover plate 11, thereby achieving the purpose of torque overload protection.

[0063] See also Figures 1 to 4 Specifically, in this embodiment, the torsional vibration damper further includes a damping module, and the damping module includes a first damping plate 71, a second damping plate 72, a third damping plate 73 and a fourth damping plate 74; a flange 41 is provided at the connection between the internal spline 4 and the driving disc 3; wherein,

[0064] The first damping plate 71 is key-connected with the first clamping plate 21. In the axial direction, the side of the flange 41 of the internal spline 4 facing the first damping plate 71 and the disk surface of the drive disk 3 facing the first damping plate 71 are both against the side of the first damping plate 71 away from the first clamping plate 21. In the radial direction, the first damping plate 71 has a portion abutting against the first clamping plate 21 and the main body of the internal spline 4. Therefore, the first damping plate 71 is equivalent to combining the internal spline damping plate and the drive disk 3 damping plate in the prior art into one, which also reduces the material cost. At the same time, the second damping plate 72 is still keyed to the driving disk 3, the third damping plate 73 is still keyed to the second clamping plate 22, the side of the second damping plate 72 axially away from the driving disk 3 is still abutted against the side of the third damping plate 73 axially away from the second clamping plate 22; the fourth damping plate 74 is still axially abutted between the side of the flange 41 facing the second clamping plate 22 and the second clamping plate 22. Therefore, when the internal spline 4 rotates, it will produce relative rotational friction with the first damping plate 71 and the fourth damping plate 74 to generate damping; the driving plate 3 and the second damping plate 72 fixed thereon will rotate together with the internal spline 4, so that the first damping plate 71 fixed on the first clamping plate 21 and the driving plate 3 will rotate relative to each other to generate friction damping, and the third damping plate 73 fixed on the second clamping plate 22 will also rotate relative to the second damping plate 72 fixed on the driving plate 3 to generate friction damping, so as to jointly reduce torsional vibration and improve the NVH of the normal power system. Furthermore, the main body of the third damping plate 73 is abutted against the second clamping plate 22 via a second disc spring 75, thereby ensuring the abutment effect between the side of the main body of the third damping plate 73 facing away from the second clamping plate 22 and the side of the second damping plate 72 facing away from the driving plate 3 in the axial direction, and the disk surface of the driving plate 3 facing the first damping plate 71 and the side of the first damping plate 71 facing away from the first clamping plate 21; the main body of the fourth damping plate 74 is abutted against the second clamping plate 22 via a third disc spring 76, thereby ensuring the abutment effect among the fourth damping plate 74, the flange 41 of the internal spline 4, and the first damping plate 71 in the axial direction.

[0065] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not limited to the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any changes, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A torsional vibration damper, characterized in that: include: The torque limiting module comprises a cover plate, a first friction plate, a friction plate, a second friction plate, a pressure plate and a first disc spring which are sequentially arranged along the axial direction, wherein the first disc spring is buckled and connected with the cover plate to limit the positions of the first friction plate, the friction plate, the second friction plate and the pressure plate in the axial direction; A clamping module, the clamping module comprising a first clamping plate for installation on the gearbox side and a second clamping plate installed on the engine flywheel side, the first clamping plate and the second clamping plate being axially fastened to both sides of the friction plate; A driving disk, wherein the driving disk is clamped between the first clamping plate and the second clamping plate along an axial direction; An internal spline, the internal spline is drivingly connected to the driving disc; A vibration reduction module is used to connect the clamping module and the driving disk.

2. The torsional vibration damper according to claim 1, characterized in that: The cover plate includes a cover body and a plurality of folded ear portions, each of the folded ear portions is connected to an end of the cover body adjacent to the first disc spring in the axial direction, and the first disc spring is axially abutted between the pressure plate and the folded ear portion.

3. The torsional vibration damper according to claim 2, characterized in that: The cover body comprises a first plate body and a second plate body arranged in parallel along the axial direction, and a skirt portion connecting the first plate body and the second plate body along the axial direction; wherein, An end surface of the first plate body facing the first friction plate in the axial direction abuts against the first friction plate; The second plate body is located at the outer periphery of the first plate body in the radial direction; The plurality of folded ear portions are formed by bending the skirt portion from an end thereof adjacent to the first plate body to an end thereof away from the first plate body.

4. The torsional vibration damper according to claim 3, characterized in that: The end surface of the first plate body facing the first friction plate is provided with a plurality of first protrusions along the circumferential direction, and the end surface of the first friction plate facing the cover plate is provided with a plurality of first recesses along the circumferential direction; The plate surface of the pressure plate facing the second friction plate is provided with a plurality of second protrusions along the circumferential direction, and the end surface of the second friction plate facing the pressure plate is provided with a plurality of second recesses along the circumferential direction; Each of the first protrusions is interference-fitted into a corresponding first recess; Each of the second protrusions is interference-fitted in a corresponding second recess.

5. The torsional vibration damper according to claim 1, characterized in that: The first clamping plate and the second clamping plate are both provided with holes matching the vibration reduction module, and two ends of the vibration reduction module are respectively abutted against the inner walls of the holes of the two clamping plates along the circumferential direction.

6. The torsional vibration damper according to claim 5, characterized in that The driving disk includes a disk body and a plurality of extensions formed radially outward from the outer edge of the disk body. The plurality of extensions are circumferentially spaced from the vibration reduction module, and two ends of the vibration reduction module are respectively abutted against two adjacent extensions along the circumferential direction.

7. The torsional vibration damper according to claim 6, characterized in that: The first clamping plate includes a plurality of first riveted portions which are arranged one by one along the radial direction at the outer edge of the hole and are located between the two ends of the hole in the circumferential direction; the second clamping plate includes a plurality of second riveted portions which are arranged one by one along the radial direction at the outer edge of the hole and are located between the two ends of the hole in the circumferential direction; the inner edge of the friction plate is provided with a plurality of third riveted portions which protrude radially inward; The first riveted portions, the third riveted portions, and the second riveted portions are aligned and matched along the axial direction to form a plurality of limiting portions arranged along the circumferential direction, and the end of each of the extending portions is correspondingly limited between two adjacent limiting portions.

8. The torsional vibration damper according to claim 7, characterized in that: The multiple first riveted portions of the first clamping plate are all formed by the first clamping plate protruding outwards toward the plate surface of the second clamping plate, and the multiple first riveted portions of the second clamping plate are all formed by the second clamping plate protruding outwards toward the plate surface of the first clamping plate.

9. The torsional vibration damper according to claim 1, characterized in that: It also includes a damping module, which includes a first damping plate, a second damping plate, a third damping plate and a fourth damping plate; a flange is provided at the connection between the internal spline and the driving disk; wherein, The first damping plate is key-connected to the first clamping plate. In the axial direction, the side of the flange of the internal spline facing the first damping plate and the disk surface of the driving plate facing the first damping plate both abut against the side of the first damping plate away from the first clamping plate. In the radial direction, the first damping plate has a portion abutting against the first clamping plate and the main body of the internal spline. The second damping plate is key-connected to the driving disk, the third damping plate is key-connected to the second clamping plate, and a side of the second damping plate axially away from the driving disk abuts against a side of the third damping plate axially away from the second clamping plate; The fourth damping plate is axially abutted between a side of the flange facing the second clamping plate and the second clamping plate.

10. The torsional vibration damper according to claim 9, characterized in that The main body of the third damping plate is in contact with the second clamping plate via a second disc spring; The main body of the fourth damping plate is in contact with the second clamping plate via a third disc spring.

Images