Torque damping device

Abstract

The utility model relates to a torque damping device which comprises a torque limiter and a torque damper, the torque damper is in transmission connection with the torque limiter and used for enabling torque from a power source of a vehicle to be transmitted to a transmission of the vehicle through the torque limiter and the torque damper, the torque limiter comprises a pressure plate, and the pressure plate is arranged on the pressure plate. The radial inner end of the pressure plate is provided with an integrally-formed stop plate. The torque damper comprises a flange plate, the radial outer end of the flange plate is provided with a stopping protrusion, the stopping protrusion is located between the two pressure plates in the circumferential direction, and when the flange plate rotates, the maximum rotation angle of the flange plate is limited through abutting of the stopping protrusion and the stopping plate. The backstop plate and the pressure plate are integrally formed, metal plates and rivets are omitted, the number of parts is reduced, the assembly process is simplified, and the assembly efficiency and the structural strength of the pressure plate are improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle vibration reduction technology, and in particular to a torque vibration reduction device. Background Technology

[0002] In related technologies, torque damping devices include torque limiters and torque dampers. The maximum rotation angle between the flange of the torque damper and the cover plate of the torque limiter needs to be limited to prevent the coil spring from being over-compressed. In related technologies, a stop plate is fixedly connected to the radially inner side of the pressure plate of the torque limiter. A stop protrusion is provided on the radially outer side of the flange of the torque damper. The stop plate can extend radially inward to abut against the stop protrusion of the flange, thereby limiting the maximum rotation angle between the flange and the cover plate.

[0003] However, stop plates are usually fixed to pressure plates with fasteners such as bolts and pins. Riveting additional metal plates to pressure plates not only increases the number of parts but also adds steps to the assembly process. Furthermore, the collision between the flange and the metal plate is not conducive to the improvement of vehicle noise, vibration, and harshness (NVH). Utility Model Content

[0004] To overcome the problems existing in related technologies, this disclosure provides a torque damping device.

[0005] According to a first aspect of the present disclosure, a torque damping device is provided, comprising: a torque limiter and a torque damper, the torque damper being tractively connected to the torque limiter for transmitting torque from a power source of a vehicle to the vehicle's transmission via the torque limiter and the torque damper; the torque limiter including a pressure plate, the inner radial end of the pressure plate being provided with an integrally formed stop plate; the torque damper including a flange, the outer radial end of the flange being provided with a stop protrusion, the stop protrusion being circumferentially located between two stop plates, and limiting the maximum rotation angle of the flange by the abutment between the stop protrusion and the stop plates when the flange rotates.

[0006] In some embodiments, the stop plate and the pressure plate are axially offset.

[0007] In some embodiments, the stop plate includes a first stop plate and a second stop plate that are axially offset, wherein the first stop plate is radially connected between the pressure plate and the second stop plate, the first stop plate is axially offset from the pressure plate, and the second stop plate abuts against the stop protrusion of the flange.

[0008] In some embodiments, the torque limiter further includes a retaining plate, two friction plates, a first diaphragm spring, a first cover plate, and a second cover plate. The retaining plate receives torque from a power source of the vehicle. The radially inner side of the retaining plate is clamped between the two friction plates and transmits torque through friction with the friction plates. The two friction plates are respectively fixed to the first cover plate and the pressure plate. The first diaphragm spring axially abuts between the pressure plate and the second cover plate.

[0009] In some embodiments, the first cover plate and the second cover plate are provided with a first window, the flange is provided with a second window corresponding to the position of the first window, and the torque damper further includes a coil spring, the coil spring being located within the first window and the second window.

[0010] In some embodiments, the torque damper further includes a hub, and the flange is torsionally fitted onto the outside of the hub.

[0011] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: the stop plate and the pressure plate are integrally formed, eliminating the metal plates and rivets required in traditional designs. This integrated design reduces the number of parts and manufacturing costs. Simultaneously, the integrated design simplifies the assembly process, eliminating the need for additional rivet installation of metal plates on the pressure plate, reducing assembly time and labor costs. It also avoids the risks of errors and malfunctions that may result from assembling multiple parts, reducing the risk of loosening or detachment and ensuring the stability of the torque damping device during long-term operation. Furthermore, the integrated design reduces the space occupied by unnecessary connecting parts, making the entire torque damping device structure more compact. Attached Figure Description

[0012] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0013] Figure 1 This is a cross-sectional view of a torque damping device according to an exemplary embodiment;

[0014] Figure 2 For the reason Figure 1 View from the right side, and show a diagram with the retaining plate, first cover plate, and second cover plate removed;

[0015] Figure 3 This is a partially enlarged schematic diagram showing the stop plate and the stop protrusion not touching, according to an exemplary embodiment.

[0016] Figure 4 This is a partially enlarged schematic diagram illustrating the contact between the stop plate and the stop protrusion according to an exemplary embodiment;

[0017] Figure 5 This is a partial cross-sectional view of the stop plate and the stop protrusion of the flange according to an exemplary embodiment. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0019] In this disclosure, unless otherwise stated, axial A, radial R, and circumferential W refer to the axial A, radial R, and circumferential W of the torque damping device 100, respectively; the radial outer end refers to the end located radially away from the outer end. Figure 1 On the side of the central axis O (e.g.) Figure 1 The upper side (as shown), the radial inner end refers to the side on the radial R that is close to the central axis O (e.g., the upper side), the radial inner end refers to the side that is close to the central axis O on the radial R (e.g., the upper side). Figure 1 (as shown on the lower side).

[0020] Furthermore, "transmission connection" refers to the ability to transmit driving force / torque between two components. These two components can be directly connected or achieve the above function through various transmission mechanisms or connection structures. The term "torsional connection" refers to a connection between two elements in a manner that does not rotate relative to each other. This can be achieved through a press fit (i.e., interference fit) or by integrally forming the two mentioned components. Those skilled in the art will understand the specific meaning of the above terms in this invention as appropriate to the specific circumstances.

[0021] like Figure 1 As shown, this disclosure provides a torque damping device 100, which is a device disposed between an engine and a transmission for transmitting torque between the engine (not shown) and the transmission or gearbox (not shown) and reducing torsional vibration or torsional impact when transmitting torque.

[0022] 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 transmission up to a predetermined torque limit, thereby preventing excessive torque transmission between the engine and transmission and potential damage to the engine or transmission. The torque damper 20 reduces torsional vibration or torsional impact during torque transmission between the engine and transmission. Therefore, the torque limiter 100 and the torque damper 20 enable the torque damping device 100 to simultaneously perform torque limiting and torque damping functions.

[0023] In this embodiment, the torque limiter 10 is generally located radially outside the torque damper 20. For example... Figure 1 As shown, the torque limiter 10 includes a retaining plate 11, two friction plates 12, a pressure plate 13, a first diaphragm spring 14, a first cover plate 15, and a second cover plate 16. The radially inner side of the retaining plate 11 is clamped between the two friction plates 12, which are respectively fixed to the first cover plate 15 and the pressure plate 13. The first diaphragm spring 14 abuts axially between the pressure plate 13 and the second cover plate 16 of the torque damper 20 described below.

[0024] The engine rotates and transmits torque to the radially outer side of the retaining plate 11. The retaining plate 11 generates relative rotation or rotational tendency in the circumferential direction W. Due to the axial pressing action of the first diaphragm spring 14, friction is generated on the contact surface between the radially inner side of the retaining plate 11 and the two friction plates 12. The torque is transmitted to the two friction plates 12 through the friction force. The friction plates 12, which are fixedly connected to the first cover plate 15, transmit the torque to the first cover plate 15. The first cover plate 15 and the second cover plate 16 transmit torque through a torsion-resistant connection by a plurality of fixing bolts arranged in the circumferential direction W.

[0025] When the torque received radially outward by 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 (also known as a damper). The aforementioned maximum torque is the maximum torque provided by the maximum frictional force of the first diaphragm spring 14 axially pressing between the two friction plates 12 and the retaining plate 11. The maximum torque can be adjusted by adjusting the clamping force of the first diaphragm spring 14 and / or the coefficient of friction of the two friction plates 12 and / or the retaining plate 11.

[0026] Therefore, the torque limiter 10 transmits the torque within a preset range to the retaining plate 11. Excessive torque cannot be transmitted to the torque damper 20 due to slippage between the two friction plates 12 and the retaining plate 11, thus protecting the engine or transmission from damage.

[0027] Furthermore, the torque damper 20 includes a flange 21, a coil spring 22, and a hub 23. The flange 21 is located axially 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 first window 151. The flange 21 is provided with a second window 212 at the position corresponding to the first window 151. The coil spring 22 is accommodated in the first window 151 and the second window 212.

[0028] When the engine transmits torque to the transmission in the forward direction, the first cover plate 15 and the second cover plate 16 receive the torque and rotate. The coil spring 22 is compressed through the circumferential inner wall of the first window 151. The coil spring 22 is compressed and drives the flange 21 to rotate through the second window 212 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, thus realizing the torque transmission from the engine to the transmission.

[0029] When the transmission transmits torque to the engine in the reverse direction, the input shaft of the transmission drives the hub 23 to rotate, and the hub 23 in turn drives the flange 21 to rotate. The flange 21 compresses the coil spring 22 through the inner wall of the second window 212. The coil spring 22 is compressed and drives the first cover plate 15 and the second cover plate 16 to rotate through the first window 151. The friction plates 12 on the first cover plate 15 and the pressure plate 13 transmit the torque to the retaining plate 11 through friction, thus realizing the transmission of torque to the engine.

[0030] As can be seen from the above, when transmitting torque in the forward or reverse direction, the flange 21 transmits torque to the first cover plate 15 and the second cover plate 16 through the compression coil spring 22. Therefore, the flange 21 does not rotate synchronously with the first cover plate 15 and the second cover plate 16. In order to avoid the coil spring 22 from being over-compressed and breaking, 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.

[0031] like Figures 2 to 5 As shown, a stop protrusion 211 is also provided at the radial outer end of the flange 21. The stop protrusion 211 protrudes radially R from the radial outer end of the flange 21 and is integrally formed with the flange 21. Multiple stop protrusions 211 can be provided on the flange 21 in the circumferential direction W. When the flange 21 rotates relative to the first cover plate 15 and the second cover plate 16, the maximum rotation angle of the flange 21 relative to the first cover plate 15 and the second cover plate 16 is limited by the contact between the stop protrusion 211 of the flange 21 and the stop plate 131 of the pressure plate 13.

[0032] The stop plate 131 and pressure plate 13 are integrally formed, eliminating the need for metal plates and rivets required in traditional designs. This integrated design reduces the number of parts and lowers manufacturing costs. Simultaneously, the integrated design simplifies the assembly process, eliminating the need for additional rivet installation of metal plates on the pressure plate 13, reducing assembly time and labor costs. It also avoids the risks of errors and malfunctions that may arise from assembling multiple parts, reducing the risk of loosening or detachment and ensuring the stability of the torque damping device 100 during long-term operation. Furthermore, the integrated design reduces the space occupied by unnecessary connecting parts, making the entire torque damping device 100 structure more compact.

[0033] For example Figure 5 As shown, in some embodiments, the stop plate 131 and the pressure plate 13 are offset in the axial direction A, so that the stop plate 131 of the pressure plate 13 and the stop protrusion 211 of the flange 21 can have a large overlap dimension in the axial direction A, which improves the axial contact area and stability when the stop plate 131 and the stop protrusion 211 abut, reduces the loosening or axial deflection that may occur under the action of external torque, and ensures reliability during long-term operation.

[0034] In addition, the increased contact area between the stop plate 131 and the stop protrusion 211 in the axial direction A makes the stop plate 131 of the pressure plate 13 more firmly limit the maximum rotation angle between the flange 21 and the first cover plate 15 and the second cover plate 16, preventing the stop plate 131 or the stop protrusion 211 from breaking or failing due to overload or impact.

[0035] Furthermore, in a specific embodiment, such as Figure 5 As shown, the stop plate 131 specifically includes a first stop plate 1311 and a second stop plate 1312 that are axially offset by A. The first stop plate 1311 is connected between the pressure plate 13 and the second stop plate 1312 in the radial direction R. The first stop plate 1311 and the pressure plate 13 are offset in the axial direction A. The second stop plate 1312 is also offset from the first stop plate 1311 in the axial direction A. The second stop plate 1312 abuts against the stop protrusion 211 of the flange 21.

[0036] The stop plate 131 has a first stop plate 1311 and a second stop plate 1312 that are gradually offset along the axial direction A. When the stop plate 131 is subjected to a large circumferential torque W, the stop plate 131 is segmented and offset in the axial direction, which not only enhances the overall structural strength of the stop plate 131, but also effectively avoids excessive local bending of the stop plate 131 and the pressure plate 13 in the axial direction A, reduces local stress concentration, prevents fracture at the bending point, improves the strength and durability of the overall structure, significantly extends the service life, and reduces the need and cost of daily maintenance.

[0037] It should be noted that the stop plate 131 having a first baffle 1311 and a second baffle 1312 is an exemplary structure. In some other embodiments, the stop plate 131 may also include multiple secondary baffles, which are gradually staggered in a stepped manner along the axial direction A. This will not be described in detail here.

[0038] Furthermore, such as Figure 2 For example, the pressure plate 13 is provided with four stop plates 131 at equal intervals in the circumferential direction W, and the stop protrusions 211 are located between two stop plates 131 in the circumferential direction W. The flange 21 is provided with two spaced stop protrusions 211 between two adjacent stop plates 131.

[0039] When the engine transmits torque to the transmission in the positive direction (e.g.) Figure 2 (In the clockwise direction shown), the right-side stop protrusion 211, located between two adjacent stop plates 131, abuts against the right-side stop plate 131, thereby limiting the maximum rotation angle of the flange 21 relative to the first cover plate 15 and the second cover plate 16 in a clockwise direction. Conversely, when the engine transmits torque in the reverse direction to the transmission (e.g., ... Figure 2 (In the counterclockwise direction shown), the left stop protrusion 211 located between two adjacent stop plates 131 abuts against the left stop plate 131, thereby limiting the maximum rotation angle of the flange 21 relative to the first cover plate 15 and the second cover plate 16 in a counterclockwise direction.

[0040] To ensure that the maximum rotation angle of the flange 21 is consistent during bidirectional rotation, the circumferential interval between the left stop protrusion 211 and the left stop plate 131 can be equal to the circumferential interval between the right stop protrusion 211 and the right stop plate 131. Furthermore, by adjusting the circumferential interval between the two stop protrusions 211, the maximum rotation angle of the flange 21 relative to the first cover plate 15 and the second cover plate 16 can be flexibly adjusted, allowing for counterclockwise or clockwise rotation.

[0041] Two stop protrusions 211 are provided between two adjacent stop plates 131. This avoids a single stop protrusion 211 occupying a large circumferential dimension, reduces the mass of the radially outer end of the flange 21, lowers the moment of inertia, and makes the vibration damping response of the torque damping device 100 more sensitive. Furthermore, compared to a single large stop protrusion 211, two smaller stop protrusions 211 not only reduce the weight of the flange 21 but also save materials and reduce manufacturing costs. The two stop protrusions 211 also help maintain a more uniform mass distribution of the flange 21.

[0042] When flange 21 is relatively stationary with respect to the first cover plate 15 and the second cover plate 16 and there is no relative rotation, such as Figure 3 As shown, the stop protrusion 211 and the stop plate 131 have a predetermined circumferential distance in the circumferential direction, at which time the coil spring 22 is not compressed. When the flange 21 rotates relative to the first cover plate 15 and the second cover plate 16, within a certain circumferential angle, the stop plate 131 of the pressure plate 13 allows the coil spring 22 to be compressed, thereby reducing torsional vibration or torsional impact when transmitting torque.

[0043] As flange 21 rotates relative to the first cover plate 15 and the second cover plate 16, the coil spring 22 will also be gradually compressed along with the relative rotation of the second window 212 and the first window 151, such as... Figure 4As shown, until the stop protrusion 211 of the flange 21 contacts and abuts against the stop plate 131 of the pressure plate 13. At this point, the flange 21 can no longer rotate relative to the first cover plate 15 and the second cover plate 16, thus limiting the maximum rotation angle of the flange 21 relative to the first cover plate 15 and the second cover plate 16.

[0044] Correspondingly, the coil spring 22 is no longer continuously compressed, thus protecting the coil spring 22 from excessive compression, preventing it from being damaged or failing, and extending the service life of the coil spring 22.

[0045] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims. It should be understood that this 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 this disclosure is limited only by the appended claims.

Claims

1. A torque damping device (100), characterized in that, include: The torque limiter (10) and torque damper (20) of the transmission connection are used to transmit the torque from the vehicle's power source to the vehicle's transmission via the torque limiter (10) and the torque damper (20). The torque limiter (10) includes a pressure plate (13), and an integrally formed stop plate (131) is provided at the radial inner end of the pressure plate (13). The torque damper (20) includes a flange (21), and a stop protrusion (211) is provided at the radial outer end of the flange (21). The stop protrusion (211) is located between two stop plates (131) in the circumferential direction (W). When the flange (21) rotates, the maximum rotation angle of the flange (21) is limited by the contact between the stop protrusion (211) and the stop plate (131).

2. The torque damping device (100) according to claim 1, characterized in that, The stop plate (131) and the pressure plate (13) are offset in the axial direction (A).

3. The torque damping device (100) according to claim 2, characterized in that, The stop plate (131) includes a first stop plate (1311) and a second stop plate (1312) that are axially offset. The first stop plate (1311) is connected radially (R) between the pressure plate (13) and the second stop plate (1312). The first stop plate (1311) is offset from the pressure plate (13) in the axial direction (A). The second stop plate (1312) abuts against the stop protrusion (211) of the flange (21).

4. The torque damping device (100) according to claim 1, characterized in that, The torque limiter (10) further includes a retaining plate (11), two friction plates (12), a first diaphragm spring (14), a first cover plate (15), and a second cover plate (16). The retaining plate (11) receives torque from the power source of the vehicle. The radially inner side of the retaining plate (11) is clamped between the two friction plates (12) and transmits torque through friction with the friction plates (12). The two friction plates (12) are respectively fixed on the first cover plate (15) and the pressure plate (13). The first diaphragm spring (14) abuts axially between the pressure plate (13) and the second cover plate (16).

5. The torque damping device (100) according to claim 4, characterized in that, The first cover plate (15) and the second cover plate (16) are provided with a first window (151), and the flange (21) is provided with a second window (212) corresponding to the position of the first window (151). The torque damper (20) also includes a coil spring (22), which is located inside the first window (151) and the second window (212).

6. The torque damping device (100) according to claim 1, characterized in that, The torque damper (20) also includes a hub (23), and the flange (21) is torsionally fitted onto the outside of the hub (23).

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