Torque damping device

Abstract

The utility model relates to a torque damping device which comprises a torque limiter and a torque damper which are in transmission connection and used for transmitting torque from a power source of a vehicle to a transmission of the vehicle through the torque limiter and the torque damper, and the torque damper comprises a first cover plate and a second cover plate. The first cover plate and the second cover plate are in anti-torque connection and receive torque from the torque limiter, and the first cover plate and the second cover plate are each provided with a second window; the flange plate is arranged between the first cover plate and the second cover plate in a relative rotation mode in the axial direction, the flange plate is provided with a first window, and the coil spring is located in the first window and the second window; the torque damper further comprises a protruding block, the protruding block is inserted into the coil spring, when the flange plate rotates relative to the first cover plate and the second cover plate, one end of the protruding block abuts against the flange plate, the other end of the protruding block abuts against the first cover plate and the second cover plate, and therefore the maximum rotation angle of relative rotation of the flange plate and the first cover plate and the maximum rotation angle of relative rotation of the flange plate and the second cover plate are limited.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle shock absorption, in particular to a torque vibration reduction device. Background Art

[0002] Internal combustion engines will continue to power vehicles for the foreseeable future. Regardless of the type of transmission used, the fundamental requirements for torque transfer between the engine and transmission remain the same: to reduce torsional vibration and rotational non-uniformity while ensuring starting and delivering average torque. Therefore, a vibration damping device is typically installed between the engine and transmission to absorb and dampen torque vibrations from the engine (forward torque transfer) or from the motor within the transmission case (reverse torque transfer).

[0003] In the related art, the torque damping device includes a torque limiter and a torque damper. The maximum rotation angle between the flange of the torque damper and the cover of the torque limiter needs to be limited to avoid excessive compression of the coil spring. Figure 1 As can be seen, a stop plate 131 is fixedly connected to the radially inner side of the torque limiter's support plate 13. A stop protrusion is provided on the radially outer side of the torque damper's flange. The stop plate 131 can extend radially inward to abut against the stop protrusion on the flange 21, thereby limiting the maximum relative rotation angle between the flange and the cover plate.

[0004] However, the stop plate and flange are usually made of metal materials and are fixed together with the support plate by fasteners such as bolts and pins. Riveting additional metal plates on the support plate not only increases the steps of the assembly process, but also the collision between the flange and the metal plate is not conducive to improving the noise, vibration and harshness (NVH) of the entire vehicle. Utility Model Content

[0005] In order to overcome the problems existing in the related art, the present disclosure provides a torque vibration reduction device.

[0006] According to a first aspect of an embodiment of the present disclosure, the present disclosure provides a torque damper device, comprising: a torque limiter and a torque damper in a transmission connection, for transmitting torque from a power source of a vehicle to a transmission of the vehicle via the torque limiter and the torque damper, the torque damper comprising a first cover plate and a second cover plate, the first cover plate and the second cover plate being torsionally connected and receiving torque from the torque limiter, the first cover plate and the second cover plate both being provided with a second window; a flange and a coil spring, the flange being axially rotatable relative to the first cover plate and the second cover plate, the flange having a first window, the coil spring being located within the first window and the second window; wherein the torque damper further comprises a protrusion, the protrusion being inserted into the coil spring, and when the flange rotates relative to the first cover plate and the second cover plate, one end of the protrusion abuts against the flange, and the other end of the protrusion abuts against the first cover plate and the second cover plate, so as to limit a maximum rotation angle of the flange relative to the first cover plate and the second cover plate.

[0007] In some embodiments, the length of the protrusion is smaller than the length of the coil spring when it is not compressed.

[0008] In some embodiments, the protrusion is made of polyester rubber material, and when one end of the protrusion abuts against the flange and the other end abuts against the first cover plate and the second cover plate, the protrusion can be deformed.

[0009] In some embodiments, the torque damper further includes a spring cap, which is disposed on the outside of at least one end of the coil spring, wherein the diameter of the spring cap is larger than the outer ring diameter of the coil spring, so that the coil spring is isolated from the first window and the second window.

[0010] In some embodiments, the protrusion is detachably fixedly connected to one side of the spring cap at one end of the coil spring.

[0011] In some embodiments, the protrusion is integrally formed with the spring cap.

[0012] In some embodiments, a plug-in portion is further provided on one side of the spring cap, the plug-in portion is inserted into the inner ring of the coil spring, the protrusion is fixedly connected to the plug-in portion, and touches the plug-in portion of the spring cap at the other end.

[0013] In some embodiments, a radially protruding crushing rib is provided on the outside of the plug-in portion, and the plug-in portion is interference-fitted with the inner ring of the coil spring via the crushing rib.

[0014] In some embodiments, the torque limiter also includes: a retaining plate, two friction plates, a support plate, and a first diaphragm spring, the radial inner side of the retaining plate is clamped between the two friction plates, the two friction plates are clamped between the first cover plate and the support plate, and the first diaphragm spring is axially abutted between the support plate and the second cover plate.

[0015] In some embodiments, the torque damper further includes: a friction gasket, which is in frictional contact with the other axial side of the flange, and the friction gasket protrudes toward the second cover plate to form a hollow protrusion; and a second diaphragm spring, which is elastically in contact between the protrusion and the second cover plate.

[0016] The technical solutions provided by the embodiments of the present disclosure can provide the following beneficial effects: The protrusions, inserted into the coil spring, effectively limit the maximum rotation angle between the flange and the first and second cover plates, protecting the coil spring from excessive compression. Furthermore, the entire torque damping device is more compact, optimizing the spatial layout. No additional radial or axial space is required, and no additional installation steps or complex assembly processes are required, simplifying assembly and maintenance and improving production efficiency. Furthermore, the independent protrusions facilitate replacement and inspection, facilitating routine maintenance and repair work.

[0017] The bump replaces the method in the related art of limiting the maximum rotation angle by the collision and abutment of the stop protrusion at the radial outer end of the flange with the bolt or the stop plate metal, which is beneficial to the improvement of the NVH of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the structure used to limit the maximum rotation angle of the flange in an existing torque vibration reduction device;

[0020] Figure 2 is a cross-sectional view of a torque vibration reduction device according to an exemplary embodiment;

[0021] Figure 3 is a schematic structural diagram of a bump, a coil spring, and a spring cap according to an exemplary embodiment;

[0022] Figure 4 yes Figure 3 Schematic diagram of the position of the two ends of the spring protrusion when they touch each other at the maximum rotation angle of the flange relative to the first cover plate and the second cover plate after the coil spring is removed. DETAILED DESCRIPTION

[0023] 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.

[0024] In this disclosure, unless otherwise specified, the axial direction A, radial direction R, and circumferential direction W 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 Figure 2 The left side of the axis refers to Figure 2 The right side of the radial direction (or radial outer end) is the side away from the radial direction R. Figure 2 On the side of the central axis O ( Figure 2 The radial inner side (or radial inner end) refers to the side close to the central axis O in the radial direction R ( Figure 2 on the lower side of the center).

[0025] In addition, a "torque-transmitting connection" refers to the ability to transmit driving force / torque between two components. These two components can be directly connected or through various transmission mechanisms or connection structures to achieve the above function. The term "torsion-resistant connection" refers to the connection between two elements in a manner that prevents rotation relative to each other. This can be achieved through a press fit (i.e., an interference fit) or by forming the two components in an integral manner. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0026] like Figure 2 As shown, the present disclosure provides a torque vibration damping device 100, which is a device arranged between an engine and a transmission, and is used to transmit torque between the engine (not shown) and the transmission or a gearbox (not shown) and reduce torsional vibration or torsional shock when transmitting torque.

[0027] The torque damping device 100 may include a torque limiter 10 and a torque damper 20. The torque limiter 10 is used to transmit torque between the engine and the transmission that does not exceed a predetermined torque, thereby preventing excessive torque from being transmitted between the engine and the transmission, which could damage the engine or transmission. The torque damper 20 is used to reduce torsional vibration or torsional shock during torque transmission between the engine and the transmission. Thus, the torque limiter 10 and the torque damper 20 provide the torque damping device 100 with both torque limiting and torque damping functions.

[0028] In this embodiment, the torque limiter 10 is located radially outside the torque damper 20. Figure 2As shown, the torque limiter 10 includes a retaining plate 11, two friction plates 12, a support plate 13, and a first diaphragm spring 14. The radial inner side of the retaining plate 11 is clamped between the two friction plates 12. The two friction plates 12 are clamped between a first cover plate 15 and the support plate 13 of the torque damper 20 described below. The first diaphragm spring 14 abuts axially A between the support plate 13 and a second cover plate 16 of the torque damper 20 described below.

[0029] The engine rotates and transmits torque to the retaining plate 11, which generates relative rotation or rotation tendency in the circumferential direction W. Due to the axial compression of the first diaphragm spring 14, friction is generated on the contact surface between the radial inner side of the retaining plate 11 and the two friction plates 12. Friction is also generated on the contact surfaces between the two friction plates 12 and the first cover plate 15 and the support plate 13 respectively.

[0030] After receiving the torque transmitted by the engine, the radial outer side of the retaining plate 11 transmits the torque to the two friction plates 12 through friction force. The two friction plates 12 then transmit the torque to the first cover plate 15 through friction force. The first cover plate 15 and the second cover plate 16 are connected in a torsionally anti-connected manner through multiple fixing bolts arranged along the circumferential direction W to transmit the torque.

[0031] If the torque received by the radially outer side of the retaining plate 11 exceeds the maximum torque between the two friction plates 12 and the retaining plate 11, slippage will occur at the contact surface between the two friction plates 12 and the retaining plate 11, preventing the torque from being transmitted to the torque damper 20 (i.e., the damper). The maximum torque is the maximum torque provided by the maximum friction force exerted by the first diaphragm spring 14 axially pressing the two friction plates 12 and the retaining plate 11. The maximum torque can be adjusted by adjusting the pressing force of the first diaphragm spring 14 and / or the friction coefficient of the two friction plates 12 and / or the retaining plate 11.

[0032] Therefore, the torque limiter 10 transmits a preset range of torque to the retaining plate 11, and excessive torque cannot be transmitted to the torque damper 2 due to slippage between the two friction plates 12 and the retaining plate 11, so as to protect the engine or transmission from damage.

[0033] Furthermore, the torque damper 20 includes a first cover plate 15, a second cover plate 16, a flange 21, a coil spring 22 and a hub 23. The flange 21 has a first window 211 for accommodating the coil spring 22. The flange 21 is axially located between the first cover plate 15 and the second cover plate 16. The first cover plate 15 and the second cover plate 16 are provided with a second window 151 for accommodating the coil spring 22 at positions corresponding to the first window 211.

[0034] When the engine transmits torque to the transmission in the forward direction, the first cover plate 15 and the second cover plate 16 rotate after receiving the torque, compressing the coil spring 22 through the circumferential inner wall of the second window 151. The coil spring 22 is compressed and drives the flange 21 to rotate through the first window 211 of the flange 21. The flange 21 is torsionally connected to the wheel hub 23. The flange 21 then transmits the torque to the wheel hub 23 and the input shaft of the transmission, ultimately realizing the torque transmission from the engine to the transmission.

[0035] When the transmission transmits torque to the engine in reverse, the input shaft of the transmission drives the hub 23 to rotate, and the hub 23 drives the flange 21 to rotate. The flange 21 compresses the coil spring 22 through the inner wall of the first window 211. The coil spring 22 is compressed and drives the first cover plate 15 and the second cover plate 16 to rotate through the second window 151. The first cover plate 15 and the second cover plate 16 transmit the torque to the retaining plate 11 through friction, thereby finally realizing the torque transmission from the transmission to the engine.

[0036] Furthermore, it can be seen from the above content that when transmitting torque in the forward direction or the reverse direction, the torque is transmitted between the flange 21 and the first cover plate 15 and the second cover plate 16 by compressing the coil spring 22. Therefore, the flange 21 and the first cover plate 15 and the second cover plate 16 do not rotate synchronously. In order to avoid the collapse of the coil spring 22 due to excessive compression, it is necessary to limit the maximum relative rotation angle between the flange 21 and the first cover plate 15 and the second cover plate 16.

[0037] like Figure 3 and Figure 4 As shown, the torque damper 20 further includes a protrusion 27 . The protrusion 27 is in the shape of an elongated strip. The outer diameter of the protrusion 27 is smaller than the inner circle of the coil spring 22 . Therefore, the protrusion 27 can be inserted into the interior of the coil spring 22 .

[0038] The protrusion 27, by being inserted into the interior of the coil spring 22, not only effectively limits the maximum rotation angle between the flange 21 and the first cover plate 15 and the second cover plate 16, thereby preventing the coil spring 22 from being over-compressed, but also makes the entire torque vibration damping device 100 more compact and optimizes the spatial layout. It does not require additional radial and axial space, and does not require additional installation steps or complicated assembly processes, thereby simplifying the assembly and maintenance processes and improving production efficiency.

[0039] Furthermore, the independent bump 27 is easy to replace or inspect, facilitating routine maintenance and overhaul. The bump 27 also replaces the conventional method of limiting the maximum rotation angle by abutting the stopper protrusion at the radially outer end of the flange 21 against the bolt or stopper plate, thereby improving the NVH of the vehicle.

[0040] Furthermore, at least one end of the coil spring 22 may be provided with a spring cap 24. In this embodiment, spring caps 24 are provided at both ends of the coil spring 22. When the coil spring 22 is uncompressed, the spring caps 24 can abut against the inner walls of the first window 211 and the second window 151, thereby isolating the two ends of the coil spring 22 from the first window 211 and the second window 151 in the circumferential direction. Therefore, during both forward and reverse torque transmission, the coil spring 22 does not directly abut against the first window 211 of the flange 21 and the second window 151 of the first and second cover plates 15, 16. This prevents direct wear between the coil spring 22 and the flange 21 and the first and second cover plates 15, 16, thereby extending the lifespan of the flange 21 and the first and second cover plates 15, 16.

[0041] In addition, the spring cap 24 is not fixedly connected to the first window 211 and the second window 151, nor is the spring cap 24 fixedly connected to the coil spring 22. When the spring cap 24 is damaged, the spring cap 24 can be directly replaced, reducing replacement and maintenance costs. In addition, the addition of the spring cap 24 can also reduce the dynamic hysteresis of the coil spring 22.

[0042] Among them, Figure 3 As shown, the protrusion 27 can be an independent structure that is not fixedly connected to the spring cap 24. When the coil spring 22 is not compressed, the protrusion 27 can move freely within the coil spring 22. In some embodiments, the protrusion 27 can also be fixedly connected to the spring cap 24 at one end of the coil spring 22, for example, by a detachable fixed connection or the protrusion 27 can be integrally formed with the spring cap 24.

[0043] Furthermore, the spring cap 24 and the protrusion 27 can be integrally formed by an injection molding process. Compared with the metal plates that need to be riveted in the related art, the integrally formed spring cap 24 not only reduces the number of parts and simplifies the production process, but also improves the reliability and durability of the product, reduces production costs, and makes the torque vibration damping device more compact, efficient and reliable.

[0044] When the flange 21 and the first and second cover plates 15, 16 are stationary and not rotating relative to each other, the coil spring 22 is uncompressed, and the circumferential length of the protrusion 27 is also smaller than the uncompressed circumferential length of the coil spring 22. Thus, when the flange 21 rotates relative to the first and second cover plates 15, 16, the length of the protrusion 27 allows the coil spring 22 to be compressed within a certain circumferential length, thereby reducing torsional vibration or torsional shock during torque transmission.

[0045] like Figure 4As shown, when the flange 21 rotates relative to the first cover plate 15 and the second cover plate 16, the coil spring 22 is gradually compressed as the first window 211 and the second window 151 rotate relative to each other. For example, if the coil spring 22 has spring caps 24 at both ends, the spring caps 24 at both ends of the coil spring 22 gradually approach each other, and the two ends of the protrusion 27 gradually approach the spring caps 24 at both ends of the coil spring 22 until the two ends of the protrusion 27 respectively contact and abut the spring caps 24 at both ends of the coil spring 22. At this point, the flange 21 can no longer rotate relative to the first cover plate 15 and the second cover plate 16, thereby limiting the maximum rotation angle of the flange 21 relative to the first cover plate 15 and the second cover plate 16.

[0046] Accordingly, the coil spring 22 is no longer continuously compressed, thereby protecting the coil spring 22 from being over-compressed, preventing the coil spring 22 from being damaged or failing, and extending the service life of the coil spring 22.

[0047] Furthermore, the protrusion 27 can be made of polyester rubber. When one end of the protrusion 27 abuts the flange 21 and the other end of the protrusion 27 abuts the first cover plate 15 and the second cover plate 16, the protrusion 27 can be elastically deformed. The protrusion 27 made of polyester rubber has the advantages of being a high-performance elastomeric material with excellent elasticity, wear resistance, and aging resistance. It can recover to its original shape after multiple deformations, thereby extending the service life of the elastic protrusion.

[0048] On the other hand, when the ends of the bump 27 contact the spring cap 24, the polyester rubber material undergoes elastic deformation. This elastic deformation effectively absorbs the vibration and impact force generated by the collision, significantly reducing the noise generated by the collision. Traditional metal-to-metal contact generates significant noise and vibration, but the use of polyester rubber reduces direct contact between metal parts, thereby reducing noise levels and improving the noise, vibration, and harshness (NVH) of the vehicle.

[0049] Furthermore, the bump 27 may be a linear columnar structure. Figure 4 As shown, since the flange 21 rotates circumferentially relative to the first and second cover plates 15 and 16, the rotation path has a certain arc. When the protrusion 27 is linear, the two ends of the protrusion 27 respectively contact the edges of the insertion portion 242 of the spring cap 24, and the collision can cause the linear protrusion 27 to bend, thereby further reducing the noise level during the collision. In addition, the linear protrusion 27 has a simple structure and is easy to manufacture and install.

[0050] In other embodiments, the protrusion 27 can be a curved cylinder. This curved protrusion 27 better adapts to the rotational path of the flange 21 relative to the first cover plate 15 and the second cover plate 16. When the flange 21 is rotated to its extreme position, the two ends of the curved protrusion 27 smoothly contact the insertion portion 242 of the spring cap 24, described below. The curved shape ensures more uniform contact between the protrusion 27 and the spring cap 24, reducing localized stress concentration and wear. The curved shape can better absorb and buffer collision energy, further reducing noise and vibration during contact.

[0051] Furthermore, the diameter of the spring cap 24 is larger than the outer ring diameter of the coil spring 22. Since the diameter of the spring cap 24 is larger than the outer ring diameter of the coil spring 22, the coil spring 22 is radially isolated from the radial inner wall of the first window 211 of the flange 21 and the radial inner wall of the second window 151 of the first cover plate 15 and the second cover plate 16.

[0052] In this way, the spring cap 24 not only prevents the coil spring 22 from directly contacting and wearing the flange 21, the first cover plate 15 and the second cover plate 16 in the circumferential direction, but also prevents the coil spring 22 from directly contacting and wearing the flange 21, the first cover plate 15 and the second cover plate 16 in the radial direction, thereby extending the service life of the flange 21, the first cover plate 15 and the second cover plate 16, reducing the frequency of replacement or repair, and reducing maintenance costs.

[0053] The spring cap 24 may further include an inserting portion 242, which may be formed integrally with the spring cap 24. The inserting portion 242 is inserted into the inner ring of the coil spring 22, and the spring cap 24 is connected to the coil spring 22 via the inserting portion 242.

[0054] The connection position between the spring cap 24 and the coil spring 22 is made more stable, and the spring cap 24 is prevented from moving relative to the coil spring 22. This ensures that the coil spring 22 remains stable when the flange 21 rotates relative to the first cover plate 15 and the second cover plate 16, and does not generate unnecessary vibration or displacement due to friction or movement with the inner wall, thereby improving the stability and reliability of the entire torque vibration reduction device.

[0055] In some embodiments, radially raised crushing ribs 243 are provided on the exterior of the plug-in portion 242. The crushing ribs 243 not only increase the local strength of the plug-in portion 242, preventing deformation or damage when inserted into the inner ring of the coil spring 22, but also provide an interference fit between the plug-in portion 242 and the inner ring of the coil spring 22 via the crushing ribs 243. The plug-in portion 242 can be securely fixed to the coil spring 22, preventing movement of the spring cap 24 relative to the coil spring 22 and improving the stability of the entire device.

[0056] Due to the presence of the crushing rib 243, an interference fit with the coil spring 22 can be achieved without increasing the diameter of the entire plug-in portion 242. The overall size and material of the spring cap 24 are reduced, thereby reducing weight and cost.

[0057] In some embodiments, the torque damper 20 also includes a friction gasket 25 and a second diaphragm spring 26, both of which are located on the other axial side of the flange 21 close to the second cover plate 16, wherein the friction gasket 25 is in frictional contact with the other axial side of the flange 21, and the friction gasket 25 protrudes toward the second cover plate 16 to form a hollow protrusion. This structure of the friction gasket 25 increases the axial A thickness of the friction gasket 25, has higher structural strength, and uses less material. The second diaphragm spring 26 is axially A and elastically abuts between the protrusion and the second cover plate 16, playing a compressing role in the axial direction A to limit the axial position of the flange 21.

[0058] Furthermore, the friction washer 25 and the second diaphragm spring 26 consistently increase the damping of the flange 21 during both forward and reverse torque transmission. Furthermore, the friction washer 25 is made of plastic, while the first diaphragm spring 14 and the second diaphragm spring 26 are both made of metal. The maximum torque of the torque limiter 10 can be adjusted by varying the compression force of the first diaphragm spring 14, while the damping between the flange 21 and the second cover plate 16 can be adjusted by varying the compression force of the second diaphragm spring 26.

[0059] 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 encompass any variations, uses, or adaptations of the present disclosure that 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 description 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 that 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 vibration reduction device (100), characterized in that: include: A torque limiter (10) and a torque damper (20) in transmission connection are used to transmit torque from a power source of a vehicle to a transmission of the vehicle via the torque limiter (10) and the torque damper (20), The torque damper (20) comprises: a first cover plate (15) and a second cover plate (16), wherein the first cover plate (15) and the second cover plate (16) are connected in a torsionally fixed manner and receive torque from the torque limiter (10), and the first cover plate (15) and the second cover plate (16) are both provided with a second window (151); A flange (21) and a coil spring (22), wherein the flange (21) is axially rotatably disposed between the first cover plate (15) and the second cover plate (16), the flange (21) having a first window (211), and the coil spring (22) is located within the first window (211) and the second window (151); The torque damper (20) further includes a protrusion (27), which is inserted into the coil spring (22). When the flange (21) rotates relative to the first cover plate (15) and the second cover plate (16), one end of the protrusion (27) abuts against the flange (21), and the other end of the protrusion (27) abuts against the first cover plate (15) and the second cover plate (16), so as to limit the maximum rotation angle of the flange (21) relative to the first cover plate (15) and the second cover plate (16).

2. The torque vibration damping device (100) according to claim 1, characterized in that: The length of the protrusion (27) is smaller than the length of the coil spring (22) when it is not compressed.

3. The torque vibration damping device (100) according to claim 1, characterized in that: The protrusion (27) is made of polyester rubber. When one end of the protrusion (27) abuts against the flange (21) and the other end abuts against the first cover plate (15) and the second cover plate (16), the protrusion (27) can be elastically deformed.

4. The torque vibration damping device (100) according to claim 1, characterized in that The torque damper (20) further includes a spring cap (24), and the spring cap (24) is provided on the outside of at least one end of the coil spring (22). The diameter of the spring cap (24) is larger than the outer ring diameter of the coil spring (22), so that the coil spring (22) is isolated from the first window (211) and the second window (151).

5. The torque vibration damping device (100) according to claim 4, characterized in that: The protrusion (27) is detachably fixed to one side of the spring cap (24) at one end of the coil spring (22).

6. The torque vibration damping device (100) according to claim 4, characterized in that: The protrusion (27) and the spring cap (24) are integrally formed.

7. The torque vibration damping device (100) according to claim 5 or 6, characterized in that: A plug-in portion (242) is further provided on one side of the spring cap (24), and the plug-in portion (242) is inserted into the inner ring of the coil spring (22). The protrusion (27) is fixedly connected to the plug-in portion (242) and contacts the plug-in portion (242) of the spring cap (24) at the other end.

8. The torque vibration damping device (100) according to claim 7, characterized in that: A radially protruding crushing rib (243) is provided on the outside of the plug-in portion (242), and the plug-in portion (242) is interference-fitted with the inner ring of the coil spring (22) via the crushing rib (243).

9. The torque vibration damping device (100) according to claim 1, characterized in that: The torque limiter (10) further comprises: A retaining plate (11), two friction plates (12), a support plate (13), and a first diaphragm spring (14); the radial inner side of the retaining plate (11) is clamped between the two friction plates (12); the two friction plates (12) are clamped between the first cover plate (15) and the support plate (13); and the first diaphragm spring (14) is axially abutted between the support plate (13) and the second cover plate (16).

10. The torque vibration damping device (100) according to claim 1, characterized in that: The torque damper (20) further comprises: a friction gasket (25) in frictional contact with the other axial side of the flange (21), wherein the friction gasket (25) protrudes toward the second cover plate (16) to form a hollow protrusion; and A second diaphragm spring (26) is elastically abutted between the protrusion and the second cover plate (16).

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