Torque damper
By adopting an adjustable damping first cover plate and flange structure in the torque damper and utilizing the friction coefficients of different materials, the problems of complex structure and high cost caused by the large number of damping washers in the existing technology are solved, and the adjustable damping and improved space utilization efficiency are achieved.
Patent Information
- Application Number
- CN202422761763.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-13
AI Technical Summary
In existing torque vibration reduction devices, the friction control assembly requires multiple non-adjustable damping friction washers, resulting in a complex structure, high cost, and large axial space occupation.
A torque damper is designed, which adopts an adjustable damping structure between the first cover plate and the flange. The damping size is adjustable through the frictional contact between the first and second protrusions and the cover plate, and the damping effect is adjusted by utilizing the different friction coefficients of metal and plastic materials.
The invention realizes the adjustable damping size of the torque vibration damper, simplifies the structure, reduces the cost, improves the space utilization efficiency, and enhances the stability and reliability of the torque vibration damper.
Smart Images
Figure CN223387886U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle vibration reduction, in particular to a torque vibration damper. Background Art
[0002] A torque damping device is usually installed between the engine and the transmission to reduce torsional vibration and rotational unevenness while starting and transmitting average torque. For example, it absorbs and cushions the vibration of the torque output from the engine (forward torque transmission), or absorbs or cushions the vibration of the torque output from the motor in the transmission case (reverse torque transmission).
[0003] Torque vibration reduction devices typically include a torque limiter and a torque vibration reducer (also known as a damper). However, to ensure that the damping during forward or reverse torque transmission meets the requirements of power transmission or vibration reduction, existing friction control assemblies (FCPs) typically require multiple friction washers with non-adjustable damping. This results in a large number of friction washers in the damper, a complex structure, high cost, and a large amount of axial space occupied. Utility Model Content
[0004] In order to overcome the problems existing in the related art, the present disclosure provides a torque damper.
[0005] According to a first aspect of an embodiment of the present disclosure, the present disclosure provides a torque damper, comprising: a first cover plate, a contact area being provided on an axial side surface of the first cover plate; a flange plate, a first protrusion being provided on an axial side surface of the flange plate, for frictionally abutting against the contact area of the first cover plate to generate a first friction force; a first friction washer being installed on an axial side surface of the flange plate, a second protrusion being provided on an axial side surface of the first friction washer, for frictionally abutting against the contact area of the first cover plate to generate a second friction force, the second friction force being smaller than the first friction force, wherein when the flange plate and the first cover plate rotate relative to each other, at least one of the first protrusion and the second protrusion frictionally abuts against the contact area of the first cover plate, thereby realizing adjustable damping of the torque damper.
[0006] In some embodiments, the second protrusion is located radially inward of the first protrusion, and the contact area is divided into an outer contact area and an inner contact area, the outer contact area is used for frictionally abutting with the first protrusion, and the inner contact area is used for frictionally abutting with the second protrusion.
[0007] In some embodiments, the outer contact area and the inner contact area are arc-shaped, and the first protrusion and the second protrusion are both arc-shaped protrusions.
[0008] In some embodiments, the outer contact area is a protruding structure formed by axially protruding the axial side surface of the first cover plate.
[0009] In some embodiments, the axial side surface of the first cover plate is axially recessed to form a non-contact area, so that the inner contact area is flush with the axial side surface of the first cover plate.
[0010] In some embodiments, the circumferential length of the inner contact area is greater than the circumferential length of the second protrusion. In the initial position, the second protrusion frictionally abuts against the middle of the inner contact area, and the first protrusion does not abut against the outer contact area; when the flange plate rotates forward or reversely relative to the first cover plate by more than the same preset angle, the friction abutment between the second protrusion and the inner contact area is converted to the friction abutment between the first protrusion and the outer contact area, thereby achieving symmetrical angle damping adjustment.
[0011] In some embodiments, in the initial position, one end of the second protrusion is aligned with the first end of the inner contact area, and one end of the first protrusion is aligned with the second end of the outer contact area. When the flange rotates forward or reverse relative to the first cover plate, the friction abutment between the second protrusion and the inner contact area and the friction abutment between the first protrusion and the outer contact area are switched to achieve adjustable damping at an asymmetric angle.
[0012] In some embodiments, the flange is made of metal material, and the first friction washer is made of plastic material.
[0013] In some embodiments, a pin is provided on the other axial side of the first friction washer, and a socket is provided on the flange. The pin is inserted into the socket to ensure a torsion-resistant connection between the first friction washer and the flange.
[0014] In some embodiments, the initial position of the second protrusion of the first friction washer relative to the first protrusion is changed by changing the position of the inserting hole on the flange.
[0015] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the first protrusion of the flange and the second protrusion of the first friction washer can alternately frictionally abut against the contact area of the first cover plate, so that the torque damper can achieve adjustable damping size, so that the torque damper has two different damping effects, meeting the torque damper's requirements for adjustable damping. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0017] Figure 1 is a cross-sectional view of a torque vibration reduction device according to an exemplary embodiment;
[0018] Figure 2 yes Figure 1 A partial schematic diagram of the torque damper;
[0019] Figure 3 yes Figure 2 Axonometric view of part of the structure of the torque damper;
[0020] Figure 4 is a schematic diagram of a flange according to an exemplary embodiment;
[0021] Figure 5 is a schematic diagram of a first friction washer according to an exemplary embodiment;
[0022] Figure 6 is a schematic diagram showing a combination of a first friction washer and a flange according to an exemplary embodiment;
[0023] Figure 7 is a schematic structural diagram of a first cover plate according to an exemplary embodiment;
[0024] Figure 8 yes Figure 7 A local schematic diagram of the contact area;
[0025] Figure 9 is a partial schematic diagram of the second protrusion in frictional contact with the inner contact area 122;
[0026] Figure 10 yes Figure 9 sectional view of
[0027] Figure 11 This is a diagram showing the change in damping when the flange rotates symmetrically relative to the first cover plate;
[0028] Figure 12 is a partial schematic diagram of the first protrusion in frictional contact with the outer contact area 121;
[0029] Figure 13 yes Figure 12 sectional view of
[0030] Figure 14 This is a diagram showing the change in damping when the flange rotates an asymmetric angle relative to the first cover plate. DETAILED DESCRIPTION
[0031] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
[0032] In this disclosure, unless otherwise specified, the axial direction, radial direction, and circumferential direction refer to the axial direction A, radial direction R, and circumferential direction W of the torque damping device 100, respectively; the axial side refers to the Figure 1 and Figure 2 The left side in the diagram (e.g. the side where the power source is located) and the other side of the axis refers to Figure 1 and Figure 2 The right side of the transmission is the right side (e.g. the side where the transmission is located); the radial outside is the side away from the transmission in the radial direction. Figure 1 and Figure 2 On the side of the central axis O ( Figure 1 The radial inner side refers to the side closer to the central axis O in the radial direction ( Figure 1 and Figure 2 The term "transmission connection" refers to the ability to transmit driving force / torque between two components. These components can be directly connected or connected through various transmission mechanisms or connection structures. The term "torsionally rigid connection" refers to the connection between two components that prevents rotation relative to each other. This can be achieved through a press fit (i.e., an interference fit) or by integrally forming the two components. The specific meanings of these terms in the present invention will be understood by those skilled in the art depending on the specific circumstances.
[0033] like Figure 1 FIG. 1 is a cross-sectional view of a torque damping device 100. The torque damping device 100 is a device disposed between an engine (not shown) and a transmission (not shown) for transmitting torque between the engine and the transmission and reducing torsional vibration or torsional shock during the transmission. Figure 1 As shown, the torque damping device 100 includes a torque damper 10 and a torque limiter 20. In this embodiment, the torque limiter 20 can be located substantially radially outside the torque damper 10. The torque limiter 20 can be used to transmit a torque not exceeding a predetermined torque between the engine and the transmission to avoid excessive torque being transmitted between the engine and the transmission, which may cause damage to the engine or the transmission. The torque damper 10, also known as a damper, can reduce torsional vibration or torsional shock when torque is transmitted between the engine and the transmission. Therefore, the torque limiter 20 and the torque damper 10 enable the torque damping device 100 to have both a torque limiting function and a torque damping function.
[0034] In order to solve the above technical problems, Figure 2 As shown, the torque damper 10 of the present disclosure may include at least a wheel hub 11 , a first cover plate 12 , a second cover plate 13 , a flange 14 , a first friction washer 15 , a second friction washer 16 and a diaphragm spring 17 .
[0035] like Figure 3 As shown, the hub 11 is torsionally connected to the input shaft of the transmission via an internal spline, and the external gear of the hub 11 is torsionally connected to the flange 14. The first cover plate 12 and the second cover plate 13 are axially spaced apart, and the flange 14 is axially located between the first cover plate 12 and the second cover plate 13. The first cover plate 12 and the second cover plate 13 are torsionally connected, and there is relative rotation between the flange 14 and the hub 11.
[0036] First friction washer 15 abuts axially between first cover plate 12 and flange 14. First cover plate 12 can be the cover plate closest to the engine. Second friction washer 16 and diaphragm spring 17 abut axially between second cover plate 13 and flange 14. Second cover plate 13 can be the cover plate closest to the transmission. First and second friction washers 15, 16 provide adaptive damping when flange 14 rotates relative to first and second cover plates 12, 13, thereby effectively suppressing torsional vibration and shock during torque transfer between the engine and transmission.
[0037] The flange 14 can rotate in a forward and reverse direction relative to the first cover plate 12 and the second cover plate 13. The forward rotation and the reverse rotation are opposite in the circumferential direction. In this disclosure, when torque is transmitted from the engine side to the transmission side, it is defined as the forward torque transmission direction, and when torque is transmitted from the transmission side to the engine side, it is defined as the reverse torque transmission direction.
[0038] It will be understood that the terms "first," "second," and the like are used to describe various structures, but these structures should not be limited to these terms. These terms are merely used to distinguish structures of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, without departing from the scope of this disclosure, the first cover plate 12 may also be referred to as the second cover plate 13, and similarly, the second cover plate 13 may also be referred to as the second cover plate 13.
[0039] A contact area is provided on the axial side surface of the first cover plate 12. A first protrusion 141 is provided on the axial side of the flange 14, proximate to the first cover plate 12, for frictionally abutting the contact area of the first cover plate 12, thereby generating a first friction force. A first friction washer 15 is mounted on the axial side of the flange 14 in a torsionally fixed manner. A second protrusion 151 is provided on the axial side of the first cover plate 12, for frictionally abutting the contact area of the first cover plate 12, thereby generating a second friction force.
[0040] The first cover plate 12 is made of a metal material. The contact area of the first cover plate 12 is made of the same material. The material of the first friction washer 15 is different from that of the flange 14. Therefore, the friction forces generated by the flange 14 and the first friction washer 15 against the first cover plate 12 are different. In this embodiment, the first friction washer 15 can be made of plastic, while the flange 14 is made of a metal material. When the first protrusion 141 of the flange 14 frictionally abuts the first cover plate 12, it is metal-to-metal friction, resulting in a relatively large first friction force. When the second protrusion 151 of the first friction washer 15 frictionally abuts the first cover plate 12, it is metal-to-plastic friction, resulting in a relatively small second friction force, which is smaller than the first friction force.
[0041] Thus, when the second protrusion 151 of the first friction washer 15 frictionally contacts the first cover plate 12, the torque damper 10 has smaller damping. When the first protrusion 141 of the flange 14 frictionally contacts the first cover plate 12, the torque damper 10 has larger damping.
[0042] When the flange 14 and the first cover plate 12 rotate relative to each other, at least one of the first protrusion 141 and the second protrusion 151 frictionally abuts against the contact area of the first cover plate 12. Specifically, the first protrusion 141 of the flange 14 and the second protrusion 151 of the first friction washer 15 alternately frictionally abut against the contact area of the first cover plate 12, enabling the torque damper 10 to achieve adjustable damping, providing two different damping effects and satisfying the torque damper 10's requirement for adjustable damping.
[0043] In some embodiments, the second protrusion 151 of the first friction washer 15 and the first protrusion 141 of the flange 14 can be located within the same circle. In this case, the first cover plate 12 can also be provided with a single contact area, with the second protrusion 151 and the first protrusion 141 circumferentially adjacent and alternately arranged to ensure that they do not simultaneously frictionally abut against the contact area of the first cover plate 12, but at least one of them does frictionally abut against the contact area of the first cover plate 12.
[0044] As flange 14 rotates relative to first cover plate 12, second protrusion 151 of first friction washer 15 and first protrusion 141 of flange 14 alternately engage contact areas on first cover plate 12, generating varying friction forces and damping effects. In this way, torque damper 10 can provide desired damping characteristics in different situations, enabling more flexible and diverse performance adjustments.
[0045] In this embodiment, if Figures 4 to 6 As shown, the second protrusion 151 may be located radially inward of the first protrusion 141, as shown in FIG. Figure 7 and Figure 8 As shown, the contact area can also be divided into an outer contact area 121 and an inner contact area 122 . The outer contact area 121 is used for frictionally contacting the first protrusion 141 of the flange 14 , while the inner contact area 122 is used for frictionally contacting the second protrusion 151 of the first friction washer 15 .
[0046] The outer contact area 121 and the first protrusion 141 are in frictional contact, and the high friction coefficient between metal and metal can produce a large damping effect. The inner contact area 122 and the second protrusion 151 are in frictional contact, and the low friction coefficient between metal and plastic can produce a small damping effect.
[0047] The radially separated inner contact area 122 and outer contact area 121 divide the contact area into two parts, the inner and outer parts, so that the first protrusion 141 of the flange 14 and the second protrusion 151 of the first friction washer 15 can be separated in the radial direction. Therefore, when the flange 14 or the first friction washer 15 is in frictional contact with the first cover plate 12, not only is the radial space of the torque damper 10 fully utilized, thereby improving the compactness and efficiency of the structure, but also the first protrusion 141 and the second protrusion 151 can each have a larger contact area with the first cover plate 12, thereby improving the friction effect and enhancing the overall stability and reliability of the torque damper 10.
[0048] Furthermore, different friction radii produce different damping effects. In this embodiment, the first protrusion 141 is located radially outward from the second protrusion 151, resulting in a larger radius than the second protrusion 151. When the materials and friction coefficients are consistent, a larger protrusion radius results in greater damping. Therefore, in this embodiment, the frictional force generated by the first protrusion 141 in frictional contact with the outer contact area 121 is greater than the frictional force generated by the second protrusion 151 in contact with the inner contact area 122.
[0049] In this example, Figure 7 and Figure 8As shown, the outer contact region 121 and the inner contact region 122 may be arc-shaped, and the first protrusion 141 and the second protrusion 151 are also arc-shaped protrusions. The arc-shaped structure matches the rotation trajectory of the flange 14 relative to the first cover plate 12, ensuring that the contact area between the first protrusion 141 and the second protrusion 151 and the first cover plate 12 remains unchanged when rotating within a certain preset angular range, thereby ensuring the stability of the friction force.
[0050] In the initial position (i.e., when the flange 14 and the first cover plate 12 are relatively stationary), taking the example of the second protrusion 151 frictionally abutting against the inner contact area 122 and the first protrusion 141 being separated from the outer contact area 121, when the flange 14 rotates forward or reverse relative to the first cover plate 12 without exceeding the preset rotation angle, the arc-shaped structure of the second protrusion 151 and the inner contact area 122 enables the second protrusion 151 to always maintain a constant contact area with the inner contact area 122, and the second friction force generated can remain consistent within the preset rotation angle, thereby ensuring that within the preset rotation angle, consistent damping characteristics can be exhibited, so that the damping performance of the torque damper 10 is stable and consistent.
[0051] Similarly, when the first protrusion 141 frictionally abuts against the outer contact area 121 and the second protrusion 151 separates from the inner contact area 122, the arc-shaped structure of the first protrusion 141 and the outer contact area 121 also enables the first protrusion 141 and the outer contact area 121 to maintain a constant contact area, and the first friction force generated can also remain consistent.
[0052] In addition, the arc-shaped structure enables the first friction force or the second friction force to be evenly distributed throughout the entire rotation process, reducing local stress concentration and extending the service life of the friction surfaces between the flange 14, the first friction washer 15 and the first cover plate 12. The uniform friction effect helps to improve the reliability and durability of the torque damper 10.
[0053] In some embodiments, the outer contact region 121 is a protrusion formed by axially protruding from the axial side surface of the first cover plate 12. The inner contact region 122 can also be a protrusion formed by axially protruding from the axial side surface of the first cover plate 12. The protrusion heights of the inner contact region 122 and the outer contact region 121 on the first cover plate 12 can be the same. In this case, the first protrusion 141 on the flange 14 and the second protrusion 151 on the first friction washer 15 are also the same height. This simplifies the manufacturing process of the first cover plate 12.
[0054] In this embodiment, if Figure 7 and Figure 8As shown, the inner contact area 122 and the outer contact area 121 on the first cover plate 12 have different raised heights. Furthermore, the inner contact area 122 of the first cover plate 12 is flush with the axial side surface of the first cover plate 12. Specifically, the axial side surface of the first cover plate 12 is axially recessed to form a non-contact area, thereby maintaining the inner contact area 122 and the axial side surface of the first cover plate 12 in the same plane. Therefore, the inner contact area 122 is flush with the axial side surface of the first cover plate 12, while the outer contact area 121 is a raised structure.
[0055] At this time, the height of the first protrusion 141 on the flange 14 is smaller than the height of the second protrusion 151 of the first friction washer 15. When the second protrusion 151 is in frictional contact with the inner contact area 122 of the first cover plate 12, the outer contact area 121 of the first cover plate 12 can radially limit the second protrusion 151, thereby preventing the second protrusion 151 of the first friction washer 15 from moving in the radial direction, thereby improving the stability and reliability of the torque damper 10 during vibration reduction.
[0056] Furthermore, by aligning inner contact region 122 with the axial side surface of first cover plate 12 and providing a raised structure for outer contact region 121, the friction surfaces of inner contact region 122 and outer contact region 121 can be radially separated and disconnected, yet radially adjacent to each other, resulting in a more compact radial layout and optimized radial space. Forming the opposing inner contact region 122 by forming an inwardly recessed inner non-contact region 123 not only simplifies the production process but also reduces unnecessary material usage and manufacturing costs.
[0057] In an exemplary embodiment, the circumferential length of the inner contact region 122 may be greater than the circumferential length of the second protrusion 151, as shown in FIG. Figure 9 As shown, in the initial position, the second protrusion 151 is frictionally abutted against the middle portion of the inner contact area 122, and as shown in FIG. Figure 10 As shown, the first protrusion 141 does not abut against the outer contact area 121; Figure 11 As shown, when the flange 14 rotates forward or reverse relative to the first cover plate 12 by a predetermined angle, the frictional contact between the second protrusion 151 and the inner contact area 122 is converted to the frictional contact between the first protrusion 141 and the outer contact area 121, thereby achieving adjustable damping at a symmetrical angle.
[0058] Specifically, in this embodiment, no matter whether the flange 14 rotates in the forward or reverse direction relative to the first cover plate 12, as long as the preset angle is exceeded, the friction conversion from the second protrusion 151 to the first protrusion 141 will be triggered. Figure 11As shown, within a smaller angular range (-A° to +A°), the torque damper 10 provides smaller damping (generated by the friction between the second protrusion 151 and the inner contact area 122); while within a larger angular range (-B° to -A° or +A° to +B°), the torque damper 10 provides larger damping (generated by the friction between the first protrusion 141 and the outer contact area 121).
[0059] In another exemplary embodiment, Figure 12 As shown, in the initial position, one end of the second protrusion 151 is aligned with the first end 1221 of the inner contact area 122, and one end of the first protrusion 141 is aligned with the second end of the outer contact area 121 (not shown in the figure), wherein the second end of the outer contact area 121 is the end of the outer contact area 121 away from the first end 1221 of the inner contact area 122 in the circumferential direction W, as shown in FIG. Figure 14 As shown, when the flange 14 rotates in the forward or reverse direction relative to the first cover plate 12, the friction contact between the second protrusion 151 and the inner contact area 122 and the friction contact between the first protrusion 141 and the outer contact area 121 are switched (as shown in FIG. Figure 12 and Figure 13 As shown), the damping at an asymmetric angle can be adjusted.
[0060] Specifically, if Figure 14 As shown, starting from the initial position, when the flange 14 rotates in the forward direction relative to the first cover plate 12, the second protrusion 151 frictionally contacts the inner contact area 122, while the first protrusion 141 separates from the outer contact area 121. This generates a second friction force between the two, resulting in lower damping of the torque damper 10. However, when the flange 14 rotates in the reverse direction relative to the first cover plate 12, the first protrusion 141 frictionally contacts the outer contact area 121, while the second protrusion 151 separates from the inner contact area 122. This generates a first friction force between the two, resulting in higher damping of the torque damper 10.
[0061] Through this asymmetric damping, the torque damper 10 can provide different damping characteristics in different rotational directions. The asymmetric damping adjustment mechanism allows the torque damper 10 to better adapt to specific application requirements and meet various complex operating conditions, such as those requiring different damping effects in different directions under certain operating conditions.
[0062] In this embodiment, if Figure 5 、 Figure 9 and Figure 12 As shown, a latch 152 is provided on the other axial side of the first friction washer 15. Figure 4 As shown, the flange 14 is provided with corresponding sockets 142, as shown in FIG. Figure 6As shown, the latch 152 is inserted into the insertion hole 142, thereby achieving a torsion-resistant connection between the first friction washer 15 and the flange 14. The torsion-resistant connection ensures that the relative position between the first friction washer 15 and the flange 14 remains stable during the rotation and frictional contact of the flange 14 relative to the first cover plate 12, thereby improving the overall reliability and stability of the torque damper 10.
[0063] In this embodiment, by changing the position of the insertion hole 142 on the flange 14, the initial position of the second protrusion 151 of the first friction washer 15 relative to the first protrusion 141 is changed. This provides a high degree of flexibility for the installation of the first friction washer 15 and the flange 14, allowing the initial position between the two to be adjusted according to specific application requirements, thereby optimizing the vibration reduction performance of the torque damper 10, enabling the torque damper 10 to better adapt to different working conditions and application requirements, and providing more precise damping adjustment.
[0064] It is understood that in this disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of related objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.
[0065] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following scope of claims. It should be understood that the present disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the appended scope of claims.
Claims
1. A torque damper (10), characterized in that: include: A first cover plate (12), wherein an axial side surface of the first cover plate (12) is provided with a contact area; A flange (14), wherein a first protrusion (141) is provided on one axial side of the flange (14) for frictionally contacting a contact area of the first cover plate (12) to generate a first friction force; A first friction washer (15) is mounted on one axial side of the flange (14). A second protrusion (151) is provided on the axial side of the first friction washer (15) for frictionally contacting the contact area of the first cover plate (12) to generate a second friction force, wherein the second friction force is smaller than the first friction force. When the flange (14) and the first cover plate (12) rotate relative to each other, at least one of the first protrusion (141) and the second protrusion (151) frictionally abuts against a contact area of the first cover plate (12), thereby achieving adjustable damping of the torque damper (10).
2. The torque damper (10) according to claim 1, characterized in that The second protrusion (151) is located radially inward of the first protrusion (141), and the contact area is divided into an outer contact area (121) and an inner contact area (122). The outer contact area (121) is used for frictionally abutting with the first protrusion (141), and the inner contact area (122) is used for frictionally abutting with the second protrusion (151).
3. The torque damper (10) according to claim 2, characterized in that The outer contact area (121) and the inner contact area (122) are arc-shaped, and the first protrusion (141) and the second protrusion (151) are both arc-shaped protrusions.
4. The torque damper (10) according to claim 2, characterized in that The outer contact area (121) is a protruding structure formed by axially protruding the axial side surface of the first cover plate (12).
5. The torque damper (10) according to claim 4, characterized in that The axial side surface of the first cover plate (12) is axially recessed to form a non-contact area (123), so that the inner contact area (122) is flush with the axial side surface of the first cover plate (12).
6. The torque damper (10) according to claim 2, characterized in that The circumferential length of the inner contact area (122) is greater than the circumferential length of the second protrusion (151); in an initial position, the second protrusion (151) frictionally abuts against the middle of the inner contact area (122), and the first protrusion (141) does not abut against the outer contact area (121); When the flange (14) rotates in a forward or reverse direction relative to the first cover plate (12) by a predetermined angle greater than the same, the frictional contact between the second protrusion (151) and the inner contact area (122) is converted into the frictional contact between the first protrusion (141) and the outer contact area (121), thereby achieving adjustable damping at symmetrical angles.
7. The torque damper (10) according to claim 2, characterized in that In the initial position, one end of the second protrusion (151) is aligned with the first end (1221) of the inner contact area (122), and one end of the first protrusion (141) is aligned with the second end of the outer contact area (121). When the flange (14) rotates in a forward or reverse direction relative to the first cover plate (12), the friction abutment between the second protrusion (151) and the inner contact area (122) and the friction abutment between the first protrusion (141) and the outer contact area (121) are switched, thereby achieving adjustable damping at an asymmetric angle.
8. The torque damper (10) according to claim 1, characterized in that The flange (14) is made of metal material, and the first friction washer (15) is made of plastic material.
9. The torque damper (10) according to claim 1, characterized in that A latch (152) is provided on the other axial side of the first friction washer (15), and a socket (142) is provided on the flange (14). The latch (152) is inserted into the socket (142), so that the first friction washer (15) and the flange (14) are connected in a torsion-resistant manner.
10. The torque damper (10) according to claim 9, characterized in that By changing the position of the insertion hole (142) on the flange (14), the initial position of the second protrusion (151) of the first friction washer (15) relative to the first protrusion (141) is changed.