Torsion-limiting shock absorber and vehicle
By setting the plate protrusion and elastic member in the torque-limiting vibration damper, the load force of the disc spring and elastic member is adjusted, and the overload protection function weakened due to the increase in the disc spring force after wear is solved, and the stable overload protection of the friction components is achieved.
Patent Information
- Application Number
- CN202422308856.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-20
AI Technical Summary
After the wear of the traditional torque-limiting shock absorber, the increase in the disc spring force leads to an increase in the slip torque and weakens the overload protection function.
The convex part of the pressure plate and the elastic member are provided in the torque limiting damper. The elastic member is fixed to the second cover plate and crimped to the convex part of the pressure plate in a specific direction. The disc spring and the elastic member jointly adjust the load force to keep the static friction torque and slip torque of the friction component stable.
After the friction assembly is worn, the static friction torque and slip torque of the friction assembly are kept unchanged by the common deformation adjustment of the disc spring and the elastic member, ensuring the stability and controllability of the overload protection capability.
Smart Images
Figure CN223076115U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to automobile power system technology, and in particular to a torque limiting damper and a vehicle. Background Art
[0002] The torque limiting damper assembly is located between the engine and the generator. Its main functions are to transmit torque, provide overload protection, and improve the NVH performance of the vehicle. In the prior art, after the traditional torque limiting damper is worn, the disc spring force increases, resulting in an increase in slip torque and a weakened overload protection function. Utility Model Content
[0003] Based on the above description, the present application provides a torque limiting shock absorber and a vehicle to solve the problem that the overload protection function of the traditional torque limiting shock absorber is weakened after wear.
[0004] According to a first aspect, the present application provides a torque limiting vibration damper, comprising a first cover plate and a second cover plate connected to each other; a disc spring, a pressure plate, a friction assembly and a driven plate assembly are sequentially clamped between the first cover plate and the second cover plate;
[0005] The pressure plate is provided with a convex portion exposed from the second cover plate; the torsion limiting vibration damper further comprises an elastic member, the elastic member is arranged on a side of the convex portion of the pressure plate away from the disc spring and is fixedly connected to the second cover plate, a part of the elastic member is pressed against the convex portion of the pressure plate along the first direction; the elastic member has a tendency to change elastically along the second direction;
[0006] The first direction is parallel to the axial direction of the driven disc assembly, and the second direction is parallel to the radial direction of the driven disc assembly.
[0007] In one or more embodiments, a convex portion is provided on the outer periphery of the pressure plate, and the second cover plate is provided with an opening corresponding to the convex portion; the convex portion is clamped on the side wall of the opening; and the elastic member is arranged toward the opening and crimped on the convex portion.
[0008] In one or more embodiments, the elastic member includes a fixed portion and an elastic portion, the fixed portion is fixed to a side of the second cover plate facing away from the first cover plate, the elastic portion is arranged on the convex portion, and the elastic portion has a tendency to change elastically along the second direction.
[0009] In one or more embodiments, a portion of the surfaces of the first cover plate and the second cover plate facing each other are in contact with each other, and another portion of the surfaces defines a receiving space, and the disc spring, pressure plate, friction assembly and driven plate assembly are clamped in the receiving space.
[0010] In one or more embodiments, the elastic member and the protrusion are both provided in plurality, and each protrusion corresponds to one elastic member.
[0011] In one or more embodiments, the plurality of protrusions of the pressure plate are evenly spaced apart in the circumferential direction.
[0012] In one or more embodiments, the torque limiting vibration damper further includes a plurality of fasteners, wherein a portion of the fasteners penetrate and fix the elastic member, the second cover plate and the first cover plate, and another portion of the fasteners penetrate and fix the second cover plate and the first cover plate.
[0013] In one or more embodiments, the fastener is configured as a rivet.
[0014] In one or more embodiments, the friction assembly includes a first friction plate and a second friction plate; the driven plate assembly includes a driven plate;
[0015] The disc spring, the pressure plate, the first friction plate, the driven plate and the second friction plate are sequentially clamped between the first cover plate and the second cover plate.
[0016] According to a second aspect, the present application provides a vehicle, comprising an engine, a motor and a torque limiting damper as described in any one of the aforementioned embodiments, wherein the first cover plate is disposed toward one side of the engine, and the second cover plate is disposed toward one side of the motor.
[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:
[0018] In this embodiment, the disc spring, pressure plate, friction assembly and driven plate assembly are clamped in sequence between the first cover plate and the second cover plate, and the pressure plate is provided with a convex portion exposed from the second cover plate, and the elastic member is arranged on the side of the convex portion of the pressure plate away from the disc spring and fixedly connected to the second cover plate, a part of the elastic member is crimped to the convex portion of the pressure plate along the first direction, and the elastic member has a tendency to elastically change along the second direction. In this way, after the friction assembly is worn, the disc spring and the elastic member are deformed along the second direction, and the load force on both sides of the pressure plate is jointly adjusted by the elastic member and the disc spring, so that the static friction torque of the friction assembly relative to the pressure plate is kept as unchanged as possible, and the slipping torque required for the friction assembly is kept as unchanged as possible, thereby making the overload protection capability of the friction assembly stable and controllable. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A schematic structural diagram of a torque limiting vibration damper provided in an embodiment of the present application;
[0020] Figure 2 for Figure 1 A schematic cross-sectional view of the torque limiting damper along line AA;
[0021] Figure 3 for Figure 1Schematic structural diagram of the torque-limiting shock absorber in one perspective;
[0022] Figure 4 is Figure 3 Enlarged schematic diagram of local B in;
[0023] Figure 5 is Figure 1 Explosion schematic diagram of the torque-limiting shock absorber in;
[0024] Figure 6 is Figure 1 Schematic structural diagram of the torque-limiting shock absorber in another perspective in;
[0025] Figure 7 is Figure 1 Explosion schematic diagram of the driven disk assembly in the torque-limiting shock absorber in.
[0026] Description of reference numerals:
[0027] Torque-limiting shock absorber 100;
[0028] First cover plate 10;
[0029] Second cover plate 20, opening 20a;
[0030] Disc spring 30;
[0031] Pressure plate 40, convex portion 40a;
[0032] Friction assembly 50, first friction plate 51, second friction plate 52;
[0033] Driven disk assembly 60, driven disk 61, damping assembly 62, first damping disk 621, second damping disk 622, disk core 63, disk hub 64, spring 65, damping structure 66, limit block K;
[0034] Elastic member 70, fixing portion 71, elastic portion 72;
[0035] Fastener 80;
[0036] First load force N1, second load force N2;
[0037] First direction F1, second direction F2. Detailed implementation manners
[0038] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application is more thorough and comprehensive.
[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0040] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.
[0041] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.
[0042] See also Figure 1 and Figure 2 , Figure 1 FIG. 1 shows a schematic structural diagram of a torque limiting vibration damper 100 provided in an embodiment of the present application. Figure 2 Shows Figure 1 A schematic cross-sectional view of the torque limiting vibration damper 100 along the AA line in FIG. A torque limiting vibration damper 100 provided in an embodiment of the present application comprises a first cover plate 10 and a second cover plate 20 connected to each other; a disc spring 30, a pressure plate 40, a friction assembly 50 and a driven plate assembly 60 are sequentially clamped between the first cover plate 10 and the second cover plate 20; wherein the pressure plate 40 is provided with a convex portion 40a exposed to the second cover plate 20; the torque limiting vibration damper 100 also comprises an elastic member 70, the elastic member 70 is arranged on the side of the convex portion 40a of the pressure plate 40 away from the disc spring 30 and is fixedly connected to the second cover plate 20, a part of the elastic member 70 is pressed against the convex portion 40a of the pressure plate 40 along the first direction F1; the elastic member 70 has a tendency to change elastically along the second direction F2; the first direction F1 is parallel to the axial direction of the driven plate assembly 60, and the second direction F2 is parallel to the radial direction of the driven plate assembly 60.
[0043] It should be noted that the torque-limiting shock absorber 100 is installed between the engine and the motor. The first cover plate 10 is installed on the flywheel of the engine, and the hub 63 of the driven disk assembly 60 is connected to the output shaft of the motor. The disc spring 30, the pressure plate 40, the friction assembly 50, and the driven disk assembly 60 are coaxially arranged. A part of the surfaces of the first cover plate 10 and the second cover plate 20 that face each other are in contact, and the other part of the surfaces define an accommodation space, and the disc spring 30, the pressure plate 40, the friction assembly 50, and the driven disk assembly 60 are clamped in the accommodation space. The elastic member 70 is arranged on the side of the convex portion 40a of the pressure plate 40 that faces away from the disc spring 30 and is fixedly connected to the second cover plate 20. A part of the elastic member 70 is pressed against the convex portion 40a of the pressure plate 40 along the first direction F1. In this way, the disc spring 30 and the elastic member 70 are located on different sides of the pressure plate 40. The disc spring 30 has a tendency to elastically change along the second direction F2, and the elastic member 70 also has a tendency to elastically change along the second direction F2. After the friction assembly 50 wears, the disc spring 30 provides an axial load force (i.e., the first load force N1), and the elastic member 70 provides an axial load force (i.e., the second load force N2). The two cancel each other out, and the axial load force provided by the disc spring 30 is greater than the axial load force provided by the elastic member 70, so that the pressure plate 40 moves axially toward the friction assembly 50 and closely adheres to the friction assembly 50.
[0044] In this embodiment, by clamping the disc spring 30, the pressure plate 40, the friction assembly 50, and the driven disk assembly 60 in sequence between the first cover plate 10 and the second cover plate 20, by providing that the pressure plate 40 is provided with a convex portion 40a exposed outside the second cover plate 20, the elastic member 70 is arranged on the side of the convex portion 40a of the pressure plate 40 that faces away from the disc spring 30 and is fixedly connected to the second cover plate 20, and a part of the elastic member 70 is pressed against the convex portion 40a of the pressure plate 40 along the first direction F1, and the elastic member 70 has a tendency to elastically change along the second direction F2. In this way, after the friction assembly 50 wears, both the disc spring 30 and the elastic member 70 deform along the second direction F2. By jointly adjusting the load forces on both sides of the pressure plate 40 by the elastic member 70 and the disc spring 30, the static friction torque of the friction assembly 50 relative to the pressure plate 40 is made to be as unchanged as possible, and the slip torque required by the friction assembly 50 is made to be as unchanged as possible, so that the overload protection ability of the friction assembly 50 is stable and controllable. In the related art, only a disc spring is provided on one side of the friction assembly. As the friction assembly wears, the load force of the disc spring on the pressure plate gradually increases, which in turn causes the static friction torque of the friction assembly to increase. For example, if the static friction torque of the friction assembly increases from 500 N·m to 1000 N·m, then a slip torque of 1000 N·m is now required for the friction assembly to slip, resulting in a weakened overload protection ability.
[0045] Refer to Figures 3 to 5, in some embodiments, a convex portion 40a is provided on the outer periphery of the pressing plate 40, and the second cover plate 20 is provided with an opening 20a corresponding to the convex portion 40a; the convex portion 40a is clamped to the side wall of the opening 20a; the elastic member 70 is arranged towards the opening 20a and is pressed against the convex portion 40a. Specifically, the convex portion 40a is clamped to the side wall of the opening 20a. Along the circumferential direction of the pressing plate 40, the pressing plate 40 is stationary relative to the second cover plate 20. The elastic member 70 is arranged towards the opening 20a and is pressed against the convex portion 40a. It should be noted that the pressing plate 40 can move axially. In this way, after the friction assembly 50 is worn, the axial load force provided by the disc spring 30 is greater than the axial load force provided by the elastic member 70, causing the pressing plate 40 to move axially towards the friction assembly 50 and closely adhere to the friction assembly 50. Moreover, the axial load force provided by the disc spring 30 and the axial load force provided by the elastic member 70 cancel each other out, so that the static friction torque of the friction assembly 50 relative to the pressing plate 40 remains as unchanged as possible, improving the stability of the overload protection ability of the torque-limiting shock absorber 100.
[0046] Continue to refer to Figure 4 , in some embodiments, the elastic member 70 includes a fixing portion 71 and an elastic portion 72. The fixing portion 71 is fixed to the side of the second cover plate 20 away from the first cover plate 10, and the elastic portion 72 is arranged on the convex portion 40a. The elastic portion 72 has a tendency to elastically change along the second direction F2. In this way, by pressing the elastic portion 72 of the elastic member 70 against the pressing plate 40, the elastic portion 72 can elastically deform along the second direction F2, thereby being able to adjust the load force on one side of the pressing plate 40.
[0047] Refer to Figure 6 , in some embodiments, both the elastic member 70 and the convex portion 40a are provided in multiple numbers, and each convex portion 40a corresponds to an elastic member 70. Further, the multiple convex portions 40a of the pressing plate 40 are evenly spaced along the circumferential direction. In a specific embodiment, both the elastic member 70 and the convex portion 40a are provided in 3 numbers, and the 3 convex portions 40a of the pressing plate 40 are evenly spaced along the circumferential direction. In other embodiments, the numbers of the elastic member 70 and the convex portion 40a can be set according to actual needs, and this embodiment does not limit it here. In this way, a plurality of elastic members 70 with evenly spaced intervals are circumferentially arranged on one side surface of the pressing plate 40. Together with the disc spring 30, they jointly adjust the load forces on both sides of the pressing plate 40. After friction occurs in the friction assembly 50, while the pressing plate 40 can closely adhere to the friction assembly 50, the static friction torque of the friction assembly 50 relative to the pressing plate 40 can be made as unchanged as possible, improving the stability of the overload protection ability of the torque-limiting shock absorber 100.
[0048] Continue to refer to Figure 5 and Figure 6, in some embodiments, the torque-limiting shock absorber 100 further includes a plurality of fasteners 80. A part of the fasteners 80 penetrate and fix the elastic member 70, the second cover plate 20, and the first cover plate 10, and another part of the fasteners 80 penetrate and fix the second cover plate 20 and the first cover plate 10. In a specific embodiment, there are 12 fasteners 80. The 12 fasteners 80 penetrate and fix the second cover plate 20 and the first cover plate 10 along the circumferential direction of the second cover plate 20. Among them, 3 evenly spaced fasteners 80 simultaneously penetrate the corresponding 3 elastic members 70 and fix the 3 elastic members to the second cover plate 20. In other embodiments, the numbers of the fasteners 80 and the elastic members 70 can be set according to actual requirements, and this embodiment does not limit them here. In this way, while fixing and connecting the first cover plate 10 and the second cover plate 20 through a plurality of fasteners 80, a part of the fasteners 80 are used to fix the elastic member 70, improving the utilization rate of the fasteners 80 and reducing the use of a plurality of fastening components to fix the elastic member 70.
[0049] Continue to refer to Figure 2 and Figure 5 , in some embodiments, the fastener 80 is configured as a rivet. In this way, the elastic member 70 is pressed tightly on the second cover plate 20 through the rivet, improving the fastening property among the elastic member 70, the first cover plate 10, and the second cover plate 20.
[0050] Continue to refer to Figure 5 , in some embodiments, the friction assembly 50 includes a first friction plate 51 and a second friction plate 52; the driven disk assembly 60 includes a driven disk 61; the disc spring 30, the pressure plate 40, the first friction plate 51, the driven disk 61, and the second friction plate 52 are sequentially clamped between the first cover plate 10 and the second cover plate 20. In this way, by arranging the first friction plate 51 and the second friction plate 52 on both sides of the driven disk 61, after the first friction plate 51 and / or the second friction plate 52 are worn, the disc spring 30 and the elastic member 70 contract and deform along the second direction F2, causing the pressure plate 50 to displace to offset the gap generated by the friction assembly 50, and at the same time making the static friction force of the friction assembly 50 relative to the pressure plate 40 remain as unchanged as possible, and the slip torque required by the friction assembly 50 remain as unchanged as possible, so that the overload protection ability of the friction assembly 50 is stable and controllable.
[0051] Refer to Figure 7 , in some embodiments, the driven disk assembly 60 further includes a vibration damping assembly 62 connected to the driven disk 61. Specifically, the vibration damping assembly 62 dampens the torque transmission process of the driven disk 61.
[0052] Further, the vibration damping assembly 62 includes a first vibration damping disc 621 and a second vibration damping disc 622 located on both sides of the driven disc 61. A plurality of limiting blocks K are connected through between the first vibration damping disc 621, the driven disc 61 and the second vibration damping disc 622. A disc core 63 and a disc hub 64 arranged around the disc core 63 are provided between the first vibration damping disc 621 and the second vibration damping disc 622. A plurality of springs 65 are connected through between the first vibration damping disc 621, the disc hub 64 and the second vibration damping disc 622, and the positions of the springs 65 in the axial direction of the disc core 63 are fixed. The disc hub 64 is provided with a damping structure 66 facing the first vibration damping disc 621, and the first vibration damping disc 621 faces the first cover plate 10. Thus, while realizing the driven disc assembly 60, it can play a role in vibration damping and absorbing impact energy.
[0053] Based on the same inventive concept, an embodiment of the present application further provides a vehicle, including an engine, a motor, and a torque-limiting shock absorber 100 as described in any one of the foregoing embodiments. The first cover plate 10 is arranged on the side facing the engine, and the second cover plate 20 is arranged on the side facing the motor. Specifically, the first cover plate 10 is mounted on the flywheel of the engine, and the disc core 63 of the driven disc assembly 60 is connected to the rotating shaft of the motor.
[0054] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.
[0055] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A torque-limiting shock absorber, characterized in that, include: A first cover plate and a second cover plate connected to each other; a disc spring, a pressure plate, a friction assembly and a driven disc assembly are sequentially clamped between the first cover plate and the second cover plate; The pressure plate is provided with a convex portion exposed from the second cover plate; the torsion limiting vibration damper further comprises an elastic member, the elastic member is arranged on a side of the convex portion of the pressure plate away from the disc spring and is fixedly connected to the second cover plate, a part of the elastic member is pressed against the convex portion of the pressure plate along the first direction; the elastic member has a tendency to change elastically along the second direction; The first direction is parallel to the axial direction of the driven disc assembly, and the second direction is parallel to the radial direction of the driven disc assembly.
2. The torque-limiting shock absorber according to claim 1, characterized in that, The outer periphery of the pressure plate is provided with a convex portion, and the second cover plate is provided with an opening corresponding to the convex portion; the convex portion is clamped on the side wall of the opening; and the elastic member is arranged toward the opening and pressed on the convex portion.
3. The torque-limiting shock absorber according to claim 1, characterized in that, The elastic member includes a fixing portion and an elastic portion, the fixing portion is fixed to a side of the second cover plate away from the first cover plate, the elastic portion is arranged on the convex portion, and the elastic portion has a tendency to change elastically along the second direction.
4. The torque-limiting shock absorber according to claim 1, characterized in that, A portion of the surfaces of the first cover plate and the second cover plate facing each other are in contact with each other, and another portion of the surfaces defines a receiving space, and the disc spring, the pressure plate, the friction assembly and the driven plate assembly are clamped in the receiving space.
5. The torsional vibration damper according to any one of claims 1-4, characterized in that, The elastic member and the convex portion are both provided in plurality, and each convex portion corresponds to one elastic member.
6. The torque-limiting shock absorber according to claim 5, characterized in that, The plurality of protrusions of the pressure plate are evenly spaced along the circumferential direction.
7. The torsional vibration damper according to any one of claims 1-4, characterized in that, The torque limiting vibration damper further includes a plurality of fasteners, wherein a portion of the fasteners penetrates and fixes the elastic member, the second cover plate and the first cover plate, and another portion of the fasteners penetrates and fixes the second cover plate and the first cover plate.
8. The torque-limiting shock absorber according to claim 7, characterized in that, The fastener is configured as a rivet.
9. The torsional vibration damper according to any one of claims 1-4, characterized in that, The friction assembly includes a first friction plate and a second friction plate; the driven plate assembly includes a driven plate; The disc spring, the pressure plate, the first friction plate, the driven plate and the second friction plate are sequentially clamped between the first cover plate and the second cover plate.
10. A vehicle, characterized in that, It comprises an engine, a motor and a torque limiting vibration damper as claimed in any one of claims 1 to 9, wherein the first cover plate is arranged toward one side of the engine, and the second cover plate is arranged toward one side of the motor.