Torsion limiting module of torsion damper and torsion damper
By designing a torsion damper torque limiting module with a simplified structure, the direct buckle of the cover plate, disc spring and friction plate and the uneven part coordination are solved, and the problem of high cost of torsion damper torque limiting module in the prior art is achieved, achieving both low cost and high performance.
Patent Information
- Application Number
- CN202421338129.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-06-13
AI Technical Summary
The torque-limiting modules of existing torsion dampers are difficult to develop low-cost solutions when meeting the performance requirements of different configurations of the powertrain.
A torsional vibration damper restriction module is designed, the module including a cover plate, a first disc spring, a first friction plate, a friction plate and a second friction plate. By directly connecting the cover plate and the first disc spring in the axial direction, and connecting the friction plate and the disc spring in the form of interference fit of the concave and convex parts, the structure is simplified and the material cost is reduced.
It effectively reduces material costs and reduces material costs by more than 20%, while ensuring the functions of reducing torsional vibration and torque overload protection.
Smart Images
Figure CN222633734U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of automobile parts, and in particular relates to a torsion limiting module of a torsion vibration damper and a torsion 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 limiting 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 torsion limiting module of a torsion vibration damper and a torsion vibration damper. The torsion limiting module of the torsion vibration damper provided 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 torsion limiting module of a torsion vibration damper, which comprises a cover plate and a first disc spring axially buckled and connected to one side of the cover plate; a first friction plate, a friction plate and a second friction plate are sequentially arranged axially from one side of the cover plate in a limiting space formed by buckling the cover plate and the first disc spring; wherein,
[0008] The end surface of the first friction plate facing the cover plate is fixedly connected to the end surface of the cover plate facing the first friction plate;
[0009] The end surface of the second friction plate facing the first disc spring is fixedly connected to the end surface of the first disc spring facing the second friction plate.
[0010] 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 which is connected to a side of the cover body adjacent to the first disc spring in the axial direction;
[0011] An end surface of the first disc spring that is axially away from the second friction plate abuts against an end surface of the folded ear portion that faces the first disc spring.
[0012] As a further description of the above technical solution, the outer edge of the first disc spring is radially recessed inward to form a plurality of notches, and each of the folded ear portions is correspondingly engaged in the notch at the bending position toward the first disc spring.
[0013] 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,
[0014] The end surface of the first plate body facing the first friction plate in the axial direction is fixedly connected to the first friction plate;
[0015] The second plate body is located at the outer periphery of the first plate body in the radial direction;
[0016] 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.
[0017] 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;
[0018] The end surface of the first disc spring 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 first disc spring is provided with a plurality of second recesses along the circumferential direction;
[0019] Each of the first protrusions is interference-fitted into a corresponding first recess;
[0020] Each of the second protrusions is interference-fitted in a corresponding second recess.
[0021] The utility model also provides a torsional vibration damper, comprising the torque limiting module and the clamping module, the driving plate, the internal spline and the vibration damping module of the torsional vibration damper as described above; wherein,
[0022] The clamping module comprises a first clamping plate for installation on the gearbox side and a second clamping plate installed on the engine flywheel side, wherein the first clamping plate and the second clamping plate are axially fastened to both sides of the friction plate;
[0023] The driving disk is clamped between the first clamping plate and the second clamping plate along the axial direction;
[0024] The internal spline is drivingly connected to the driving disc;
[0025] The vibration reduction module is used to connect the clamping module and the driving disk.
[0026] 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; the driving disk comprises a disk body and a plurality of extensions formed radially outward from the outer edge of the disk body, and the plurality of extensions are circumferentially spaced from the vibration reduction module;
[0027] Two ends of the vibration reduction module are respectively in contact with the inner walls of the holes of the two clamping plates and the two extensions adjacent to the driving disk along the circumferential direction.
[0028] 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 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 has a plurality of third riveted portions which protrude radially inward;
[0029] 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.
[0030] As a further description of the above technical solution, 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,
[0031] The first damping plate is key-connected to the first clamping plate; the flange of the internal spline on the side facing the first damping plate in the axial direction and the disk surface of the driving disk facing the first damping plate are both in contact with the side of the first damping plate away from the first clamping plate; the first damping plate has a portion in radial direction that is in contact with the first clamping plate and the main body of the internal spline;
[0032] 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;
[0033] The fourth damping plate is axially abutted between a side of the flange facing the second clamping plate and the second clamping plate.
[0034] 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;
[0035] The main body of the fourth damping plate is in contact with the second clamping plate via a third disc spring.
[0036] By means of the above technical solution, the outstanding effects of the utility model are:
[0037] 1. In the torque limiting module of the torsional vibration damper provided by the utility model, the first disc spring is directly connected to one side of the cover plate in the axial direction and forms a limiting space with the first disc spring to limit the axial direction of the first friction plate, the friction plate and the second friction plate sequentially arranged in the axial direction. Therefore, it is no longer necessary to use two cover plates to be relatively fastened and connected by rivet materials to limit the axial direction of other components of the torque limiting module, thereby reducing one cover plate material and a plurality of rivet materials used to connect the two cover plates of the torsional vibration damper in the traditional upper and lower double cover plate structure, thereby reducing the material cost by more than 20%;
[0038] 2. In the torque limiting module of the torsional vibration damper provided by the utility model, when the first friction plate and the cover plate are connected by means of interference fit of the concave and convex parts, the second friction plate and the first disc spring are also directly connected by means of interference fit of the concave and convex parts. Therefore, there is no need to additionally arrange a pressure plate between the first disc spring and the second friction plate to fix the second friction plate, which also simplifies the overall structure of the torque limiting module, thereby effectively reducing material costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0039] Figure 1 A partial axial cross-sectional view of a torque limiting module of a torsional vibration damper in an embodiment of the utility model;
[0040] Figure 2 It is another partial axial cross-sectional view of the torque limiting module of the torsional vibration damper in the embodiment of the utility model;
[0041] Figure 3 This is a schematic diagram of the structure of the first disc spring in the embodiment of the utility model;
[0042] Figure 4 It is an exploded schematic diagram of a torsional vibration damper in an embodiment of the utility model;
[0043] Figure 5 An axial cross-sectional view of a torsional vibration damper in an embodiment of the utility model;
[0044] Figure 6 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;
[0045] Figure 7 It is a schematic diagram of the structure after the cover plate and the first disc spring are buckled and connected in an embodiment of the utility model.
[0046] Description of Figure Numbers:
[0047] 11. Cover plate; 111. Ear folding portion; 112. First plate body; 113. Second plate body; 114. Skirt; 115. First convex portion; 12. First disc spring; 121. Second convex portion; 122. Notch; 13. First friction plate; 131. First recess; 14. Friction plate; 141. Third riveted portion; 15. Second friction plate; 151. Second recess; 2. Drive plate; 21. Plate body; 22. Extension portion; 3. Internal spline; 31. Flange; 4. Damping module; 51. First clamping plate; 511. First riveted portion; 52. Second clamping plate; 521. Second riveted portion; 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
[0048] 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.
[0049] 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.
[0050] See also Figures 1 to 7 The utility model discloses a torsion limiting module of a torsion damper and a torsion damper. The torsion limiting module of the torsion damper disclosed comprises a cover plate 11 and a first disc spring 12 axially buckled and connected to one side of the cover plate 11; a first friction plate 13, a friction plate 14 and a second friction plate 15 are sequentially arranged axially from one side of the cover plate 11 in a limiting space formed by buckling the cover plate 11 and the first disc spring 12; wherein,
[0051] The end surface of the first friction plate 13 facing the cover plate 11 is fixedly connected to the end surface of the cover plate 11 facing the first friction plate 13;
[0052] The end surface of the second friction plate 15 facing the first disc spring 12 is fixedly connected to the end surface of the first disc spring 12 facing the second friction plate 15 .
[0053] In the above-mentioned setting, the torque limiting module of the torsional vibration damper is only composed of the cover plate 11, the first friction plate 13, the friction plate 14, the second friction plate 15 and the first disc spring 12. The first disc spring 12 is directly connected to one side of the cover plate 11 along the axial direction and forms a limiting space with the first disc spring 12 to limit the axial limit of the first friction plate 13, the friction plate 14 and the second friction plate 15 arranged in sequence along the axial direction. Therefore, there is no need to use two cover plates 11 to be relatively fastened and connected by rivets to limit the axial limit of other components of the torque limiting module, thereby reducing one cover plate of the torsional vibration damper in the traditional upper and lower double cover plates 11 structure. 11 material and a plurality of rivet materials for connecting the two cover plates 11, thereby reducing the material cost by more than 20%; while the end surface of the first friction plate 13 facing the cover plate 11 is fixedly connected to the end surface of the cover plate 11 facing the first friction plate 13, the end surface of the second friction plate 15 facing the first disc spring 12 is directly fixedly connected to the end surface of the first disc spring 12 facing the second friction plate 15, and there is no need to additionally set a pressure plate between the first disc spring 12 and the second friction plate 15 to fix the second friction plate 15, which also simplifies the overall structure of the torque limiting module, thereby effectively reducing the material cost.
[0054] See also Figure 1 , Figure 2 as well as Figures 4 to 7 Specifically, in the present embodiment, the cover plate 11 includes a cover body and eight folded ear portions 111, each of the folded ear portions 111 being connected to an end of the cover body axially adjacent to the first disc spring 12, so as to be able to abut against the end surface of the first disc spring 12 facing away from the second friction plate 15 in the axial direction.
[0055] See also Figure 3 as well as Figure 6 , Figure 7Specifically, in the present embodiment, the outer edge of the first disc spring 12 is recessed radially inward with eight notches 122, so that each of the folding ear portions 111 can be correspondingly buckled into the bending position of the first disc spring 12, and then the folding ear portion 111 abuts against the end surface of the first disc spring 12 facing away from the second friction plate 15, and each of the notches 122 is equivalent to a radial avoidance position of the first disc spring 12 relative to the folding ear portion 111, thereby ensuring the radial dimension of the first disc spring 12 and the cover plate 11 after being buckled and connected.
[0056] Please continue reading Figure 1 , Figure 2 as well as Figures 4 to 7 Specifically, in this embodiment, the cover plate 11 includes a first plate body 112 and a second plate body 113 which are arranged in parallel along the axial direction, and a skirt 114 which connects the first plate body 112 and the second plate body 113 along the axial direction; wherein, the first plate body 112 is fixedly connected to the first friction plate 13 along the end face facing the first friction plate 13 along the axial direction; and the second plate body 113 is located at the outer periphery of the first plate body 112 in the radial direction, so one end of the skirt 114 is connected to the outer periphery of the first plate body 112, and the other end is connected to the inner periphery of the second plate body 113, and the plurality of folded ear portions 111 are formed by bending the skirt 114 from the end thereof adjacent to the first plate body 112 to the end thereof away from the first plate body 112. It should be understood that after the plurality of folded ear portions 111 are initially bent and formed, it should be convenient to place the other components in the torque limiting module into the inner periphery of the cover plate 11 and install them in place, just as Figure 6 As 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 with the help of an external force (such as a press machine), so that they are concentrically bent inward to press against the end surface of the first disc spring 12 away from the second friction plate 15, so that the first disc spring 12 is pressed to reach a preset working height and generate a positive pressure value within a set range to the two friction plates and the friction plate 14 limited between it and the first plate body 112. 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 that occurs when the folding ears 111 are fastened to the first disc spring 12 is determined by the positive pressure value actually required to be generated by the first disc spring 12. Preferably, each of the folding ears 111 is integrally formed with the cover body.
[0057] See also Figure 1 , Figure 2 , Figure 4 as well as Figure 5Specifically, in this embodiment, the end surface of the first plate body 112 facing the first friction plate 13 is provided with a plurality of first protrusions 115 along the circumferential direction, and the end surface of the first friction plate 13 facing the cover plate 11 is provided with a plurality of first recesses 131 along the circumferential direction, and each of the first protrusions 115 is correspondingly interference-fitted in one of the first recesses 131, so that the cover plate 11 and the first friction plate 13 are correspondingly assembled as a whole; at the same time, the end surface of the first disc spring 12 facing the second friction plate 15 is provided with a plurality of second protrusions 121 along the circumferential direction, and the end surface of the second friction plate 15 facing the first disc spring 12 is provided with a plurality of second recesses 151 along the circumferential direction, and each of the second protrusions 121 is correspondingly interference-fitted in one of the second recesses 151, so that the first disc spring 12 and the second friction plate 15 are also correspondingly assembled as a whole. As a result, the rivet material required for fixing the friction plate is reduced, and there is no need to set a pressure plate between the first disc spring 12 and the second friction plate 15 to fix the friction plate. 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.
[0058] See also Figures 4 to 7 Specifically, the torsional vibration damper disclosed in the utility model includes the torque limiting module and clamping module, drive plate 2, internal spline 3 and vibration damping module 4 of the torsional vibration damper as described above; wherein, the clamping module includes a first clamping plate 51 for installation on the gearbox side and a second clamping plate 52 installed on the engine flywheel side, the first clamping plate 51 and the second clamping plate 52 are directly and axially fastened to the two sides of the friction plate 14, and the connection between the two clamping plates is more stable; the drive plate 2 is clamped between the first clamping plate 51 and the second clamping plate 52 along the axial direction and is transmission-connected to the internal spline 3; the vibration damping module 4 is still used to connect the clamping module and the drive plate 2.
[0059] Specifically, in this embodiment, there are four vibration reduction modules 4, each of which is composed of a spring group and spring seats mounted at both ends of the spring group. The first clamping plate 51 and the second clamping plate 52 are both provided with four holes 6 matching the four vibration reduction modules 4 to install the vibration reduction modules 4. When each vibration reduction module 4 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 2 includes a disk body 21, and the disk body 21 is provided with a central opening, which is meshed with the meshing teeth on the outer periphery of the inner spline 3 through a tooth shape. The driving disk 2 also includes four extensions 22 formed radially outward from the outer edge of its disk body 21, and the four extensions 22 are arranged circumferentially at intervals with the four vibration reduction modules 4, and the two ends of each vibration reduction module 4 are also abutted against the middle side walls of two adjacent extensions 22 in the circumferential direction. Therefore, after the assembly is completed, the two ends of each of the vibration damping modules 4 are simultaneously abutted against the inner walls of the holes 6 of the first clamping plate 51 and the second clamping plate 52 and the middle side wall of the extension portion 22 included in the driving disk 2 in the circumferential direction, that is, the first clamping plate 51, the second clamping plate 52 and the driving disk 2 together constitute a mounting position for installing the vibration damping module 4.
[0060] Specifically, in this embodiment, the first clamping plate 51 is provided with four first riveted portions 511, and the four first riveted portions 511 are uniformly and one-to-one arranged at the outer edges of the four holes 6 provided on the first clamping plate 51 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 52 is provided with four second riveted portions 521, and the four second riveted portions 521 are uniformly and one-to-one arranged at the outer edges of the four holes 6 provided on the second clamping plate 52 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 14 is protruded radially inwardly with four third riveted portions 141. When the first clamping plate 5 is assembled, 1, the second clamping plate 52 and the friction plate 14 are connected, the first riveted portion 511, the third riveted portion 141 and the second riveted portion 521 are aligned in the axial direction, and the three can be fastened 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 14 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). Thus, the four groups of the first riveted portions 511, the third riveted portions 141 and the second riveted portions 521 aligned in the axial direction constitute four limiting portions arranged in the circumferential direction, so that the end of each extension portion 22 of the drive disk 2 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 14 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 driving disk 23 to realize the limiting function, and no additional limiting rivet material is required to limit the driving disk 2, which also reduces the material cost. Furthermore, the multiple first riveted parts 511 of the first clamping plate 51 are all formed by the first clamping plate 51 protruding toward the plate surface of the second clamping plate 52, and the multiple second riveted parts 521 of the second clamping plate 52 are all formed by the second clamping plate 52 protruding toward the plate surface of the first clamping plate 51, so that the space formed by the two clamping plates except the corresponding riveted parts can be used to accommodate the extension part 22 of the driving disk 2.
[0061] Therefore, when the torque value does not exceed the upper limit, during the process of the internal spline 3 and the drive disc 2 meshing with each other and rotating relative to the cover plate 11, the four extensions 22 of the drive disc 2 will squeeze the corresponding vibration reduction module 4 along its rotation direction and rotate at a certain angle. Under the reaction force of the vibration reduction module 4, the end of the extension 22 of the drive disc 2 will not eventually abut against the front limit portion along the rotation direction of the drive disc 2, but will rotate in the opposite direction at a certain angle to squeeze the vibration reduction module 4 abutting on the rear side, and the vibration reduction module 4 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 4 can effectively isolate the internal spline 3 from the rear spline 3. key 3 and torsional vibration between the driving plate 2 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 3 and the driving plate 2 meshing and rotating together, the extension portion 22 of the driving plate 2 squeezes the front side of the vibration damping module 4 corresponding to it along its rotation direction, and the reaction force applied by the vibration damping module 4 to it is not enough to offset the squeezing force it receives, so the driving plate 2 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 14 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.
[0062] See also Figure 4 and Figure 5 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 31 is provided at the connection between the internal spline 3 and the driving disc 2; wherein,
[0063] The first damping plate 71 is key-connected with the first clamping plate 51, and the side of the flange 31 of the internal spline 3 facing the first damping plate 71 in the axial direction and the disk surface of the drive disk 2 facing the first damping plate 71 are both against the side of the first damping plate 71 away from the first clamping plate 51, and the first damping plate 71 has a portion in radial direction abutting against the first clamping plate 51 and the main body of the internal spline 3. Therefore, the first damping plate 71 is equivalent to combining the damping plate of the internal spline 3 and the damping plate of the drive disk 2 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 2, the third damping plate 73 is still keyed to the second clamping plate 52, the side of the second damping plate 72 axially away from the driving disk 2 is still abutted against the side of the third damping plate 73 axially away from the second clamping plate 52; the fourth damping plate 74 is still axially abutted between the side of the flange 31 facing the second clamping plate 52 and the second clamping plate 52. Therefore, when the internal spline 3 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 2 and the second damping plate 72 fixed thereon will rotate along with the internal spline 3, so that the first damping plate 71 fixed on the first clamping plate 51 and the driving plate 2 will rotate relative to each other to generate friction damping, and the third damping plate 73 fixed on the second clamping plate 52 will also rotate relative to the second damping plate 72 fixed on the driving plate 2 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 52 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 52 and the side of the second damping plate 72 facing away from the driving disk 2 in the axial direction, and the disk surface of the driving disk 2 facing the first damping plate 71 and the side of the first damping plate 71 facing away from the first clamping plate 51; the main body of the fourth damping plate 74 is abutted against the second clamping plate 52 via a third disc spring 76, thereby ensuring the abutment effect among the fourth damping plate 74, the flange 31 of the internal spline 3, and the first damping plate 71 in the axial direction.
[0064] 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 torque limiting module of a torsional vibration damper, characterized in that: It includes a cover plate and a first disc spring axially buckled and connected to one side of the cover plate; a first friction plate, a friction plate and a second friction plate are sequentially arranged axially from one side of the cover plate in a limited space formed by buckling the cover plate and the first disc spring; wherein, The end surface of the first friction plate facing the cover plate is fixedly connected to the end surface of the cover plate facing the first friction plate; The end surface of the second friction plate facing the first disc spring is fixedly connected to the end surface of the first disc spring facing the second friction plate.
2. The torque limiting module of 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 which is connected to a side of the cover body adjacent to the first disc spring in the axial direction; An end surface of the first disc spring that is axially away from the second friction plate abuts against an end surface of the folded ear portion that faces the first disc spring.
3. The torque limiting module of the torsional vibration damper according to claim 2, characterized in that: The outer edge of the first disc spring is recessed radially inward to form a plurality of notches, and the bending position of each folded ear portion toward the first disc spring is correspondingly engaged in the notch.
4. The torque limiting module of 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, The end surface of the first plate body facing the first friction plate in the axial direction is fixedly connected to 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.
5. The torque limiting module of the torsional vibration damper according to claim 4, 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 end surface of the first disc spring 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 first disc spring 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.
6. A torsional vibration damper, characterized in that: The invention comprises a torsion limiting module of the torsional vibration damper as claimed in any one of claims 1 to 5, a clamping module, a driving plate, an internal spline and a vibration damping module; wherein: The clamping module comprises a first clamping plate for installation on the gearbox side and a second clamping plate installed on the engine flywheel side, wherein the first clamping plate and the second clamping plate are axially fastened to both sides of the friction plate; The driving disk is clamped between the first clamping plate and the second clamping plate along the axial direction; The internal spline is drivingly connected to the driving disc; The vibration reduction module is used to connect the clamping module and the driving disk.
7. The torsional vibration damper according to claim 6, characterized in that: The first clamping plate and the second clamping plate are both provided with holes matching the vibration reduction module; the driving disk comprises a disk body and a plurality of extensions formed radially outward from the outer edge of the disk body, and the plurality of extensions are spaced apart from the vibration reduction module along the circumferential direction; Two ends of the vibration reduction module are respectively in contact with the inner walls of the holes of the two clamping plates and the two extensions adjacent to the driving disk along the circumferential direction.
8. The torsional vibration damper according to claim 7, 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.
9. The torsional vibration damper according to claim 6, 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; the flange of the internal spline on the side facing the first damping plate in the axial direction and the disk surface of the driving disk facing the first damping plate are both in contact with the side of the first damping plate away from the first clamping plate; the first damping plate has a portion in radial direction that is in contact with 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.