Torsional vibration damper and torque damping device

Abstract

The utility model relates to a torsional vibration damper and a torque vibration damping device, and the torsional vibration damper comprises a cover plate assembly, an annular end face of which is provided with at least one first window; the middle flange is provided with a first protrusion extending towards the radial outer side, and in the initial state without torque, the circumferential center line of the first protrusion coincides with the circumferential center line of the first window; the single main flange and the single middle flange are coaxially arranged, the single main flange is provided with a second protrusion extending towards the radial outer side, and in the initial state without torque, the second protrusion is aligned with the circumferential edge of the first window; the coil spring assembly comprises a first coil spring and a second coil spring which are located in the first window and connected in series through first protrusions, and the free end of the first coil spring and the free end of the second coil spring are in abutting fit with the two adjacent second protrusions respectively; when torque is transmitted in the forward direction, the torque sequentially passes through the cover plate assembly, the first coil spring, the first protrusion and the second coil spring and then is transmitted to the second protrusion.

Description

Technical Field

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

[0002] In related technologies, torque damping devices typically include torsional vibration dampers and torque limiters. Torsional vibration dampers can employ a single-flange structure, consisting of a single flange, which is relatively simple. However, torsional vibration dampers with a single flange often use coil springs that are excessively long and have an insufficient outer diameter, resulting in insufficient overall stiffness. When torque is transmitted between the cover plate and the single flange, the coil spring's limited torque load-bearing capacity makes it prone to bending and deformation, thus affecting the stability of the entire torque damping device. Furthermore, the maximum rotation angle of the single flange is limited.

[0003] To address the issues associated with single-flange dampers, torsional vibration dampers employ an improved structure combining a main flange and an intermediate flange, along with cascaded coil springs to enhance damping capacity and increase the maximum rotation angle. However, for this main flange and intermediate flange combination, the maximum rotation angle is typically determined by the meshing clearance between the internal teeth of the main flange and the external teeth of the hub, necessitating mechanical constraints on the maximum rotation angle. Furthermore, due to the use of gear meshing for limiting the rotation, the hard collision between the gears at the maximum rotation angle generates significant impact noise, thus affecting the vehicle's NVH (noise, vibration, and harshness) performance. Utility Model Content

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

[0005] According to a first aspect of the present disclosure, a torsional vibration damper is provided, comprising: a cover plate assembly having at least one first window on its annular end face; an intermediate flange coaxially disposed with the cover plate assembly, the intermediate flange having a first protrusion extending radially outward, wherein in an initial state without torque, the circumferential center line of the first protrusion coincides with the circumferential center line of the first window; a single main flange coaxially disposed with the single intermediate flange, the single main flange having a second protrusion extending radially outward, wherein in an initial state without torque, the circumferential position of the second protrusion is aligned with the circumferential edge of the first window; and a coil spring assembly including a first coil spring and a second coil spring located within the first window and connected in series through the first protrusion, wherein the free ends of the first coil spring and the free ends of the second coil spring respectively form abutment engagements with two adjacent second protrusions; wherein, when transmitting torque in the forward direction, the torque is transmitted sequentially through the cover plate assembly, the first coil spring, the first protrusion of the intermediate flange, and the second coil spring, and then to the second protrusion of the single main flange.

[0006] In some embodiments, the radially outer end of the second protrusion extends along both sides of the circumference to form a symmetrical first wing, making the second protrusion T-shaped; a stop is provided on the end face of the cover plate assembly, the stop and the first wing forming a stop mechanism to limit the maximum rotation angle of the single main flange relative to the cover plate assembly.

[0007] In some embodiments, the intermediate flange includes a first intermediate flange and a second intermediate flange arranged axially, wherein a first protrusion of the first intermediate flange and a first protrusion of the second intermediate flange are fixedly connected by a first rivet; the single main flange is disposed axially between the first intermediate flange and the second intermediate flange, and the second protrusion of the single main flange is located circumferentially between two first rivets.

[0008] In some embodiments, a support plate is provided on the radially outer side of the intermediate flange, and the axial sides of the support plate are respectively riveted to the first protrusion of the first intermediate flange and the first protrusion of the second intermediate flange.

[0009] In some embodiments, the radially outer end of the support plate extends circumferentially to form symmetrical second wings, making the support plate T-shaped, and the second wings are aligned with the radially outer contour of the first window.

[0010] In some embodiments, an end separator is provided between the free end of the first coil spring and / or the second coil spring and the circumferential sidewall of the first window.

[0011] In some embodiments, the cover plate assembly has three first windows evenly distributed circumferentially, and each first window has a corresponding set of coil springs. The intermediate flange has three first protrusions, and the single main flange has three second protrusions. The first protrusions and the second protrusions are arranged crosswise in the circumferential direction.

[0012] In some embodiments, the cover plate assembly includes a first cover plate and a second cover plate that are axially opposite and fixedly connected, the first cover plate being located on one side of the first intermediate flange and the second cover plate being located on one side of the second intermediate flange.

[0013] In some embodiments, the torsional vibration damper further includes a friction washer and a diaphragm spring. The friction washer frictionally abuts against the side of the first intermediate flange away from the second intermediate flange. The diaphragm spring is pre-compressed and installed between the first cover plate and the friction washer. The axial end face of the second intermediate flange forms a direct metal-to-metal contact surface with the inner side of the second cover plate.

[0014] According to a second aspect of the present disclosure, the present disclosure provides a torque damping device, including a torsional vibration damper as described in the first aspect.

[0015] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: reducing the number of main flanges, thereby reducing the number of torsional vibration damper components. The structural change leads to a change in the torque transmission sequence; torque no longer needs to go directly from the cover plate to the single main flange, allowing the second protrusion of the single main flange to limit the maximum rotation angle of the single main flange through a stop located on the cover plate assembly, without the need for gear engagement. Simultaneously, the change in the torque transmission sequence results in a lower hysteresis effect in the torsional vibration damper. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a side view of a torque damping device according to an exemplary embodiment;

[0018] Figure 2 yes Figure 1 A side view of the second cover plate removed from the axial side;

[0019] Figure 3 yes Figure 1 A longitudinal sectional view of the torque damping device at the coil spring assembly;

[0020] Figure 4 yes Figure 1The longitudinal cross-sectional view of the torque damping device at the first protrusion of the intermediate flange. Detailed Implementation

[0021] 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.

[0022] In this invention, unless otherwise specified, axial A, radial R, and circumferential W refer to the axial A, radial R, and circumferential W of the torque damping device 100, respectively; radial outer refers to the direction radially away from... Figure 1 On the side of the central axis O ( Figure 3 and Figure 4 The upper side of the center axis O), the radial inner side refers to the side that is radially closer to the central axis O. Figure 3 and Figure 4 (Lower side of the middle). The term "torsional connection" refers to a connection between two elements that does not rotate relative to each other, which can be achieved via a press fit (i.e., an interference fit) or by integrally forming the two parts mentioned. Those skilled in the art will understand the specific meaning of the above terms in this invention as appropriate.

[0023] To solve the above technical problems, such as Figures 1 to 4 As shown, this disclosure provides a torsional vibration damper 101, which is applied to a torque damping device 100.

[0024] The torsional vibration damper 101 includes at least a cover plate assembly 10, an intermediate flange 20, a single main flange 30, and a coil spring assembly 40.

[0025] At least one first window 11 is provided on the annular end face of the cover plate assembly 10. In this embodiment, the cover plate assembly 10 has three first windows 11 evenly distributed along the circumferential direction W, and a set of coil spring assemblies 40 is correspondingly arranged in each first window 11. In this way, while ensuring structural compactness, optimal dynamic balance and load distribution in the circumferential direction W are achieved.

[0026] It should be noted that the number of first windows 11 in the circumferential W of this disclosure is merely exemplary and is not intended to limit the scope of protection of this disclosure. In other embodiments, multiple windows 11 may be provided in the circumferential direction according to different requirements such as the performance of the coil spring and the maximum rotation angle, which are not specifically limited here.

[0027] The cover plate assembly 10 includes a first cover plate 12 and a second cover plate 13 that are axially opposite and fixedly connected. The first cover plate 12 and the second cover plate 13 are axially spaced and fixedly connected by rivets 14 to achieve synchronous movement. Figure 3 and Figure 4 As shown, the first cover plate 12 is located on the engine side, and the second cover plate 13 is located on the transmission side.

[0028] The intermediate flange 20 and the single main flange 30 are coaxially arranged with the cover plate assembly 10, and the intermediate flange 20 and the single main flange 30 are located along the axial direction A in the space between the first cover plate 12 and the second cover plate 13. Figure 1 and Figure 2 As shown, the intermediate flange 20 has a first protrusion 21 extending radially outward, and the single main flange 30 has a second protrusion 31 extending radially outward. Since the cover plate assembly 10 has three first windows 11 evenly distributed along the circumferential W direction, correspondingly, the intermediate flange 20 has three first protrusions 21, and the single main flange 30 has three second protrusions 31, as shown. Figure 2 As shown, the first protrusion 21 and the second protrusion 31 are arranged intersectingly in the circumferential direction W.

[0029] like Figure 1 and Figure 2 As shown, in the initial state without torque, the circumferential center line of the first protrusion 21 coincides with the circumferential center line of the first window 11, that is, the first protrusion 21 is located in the circumferential center of the first window 11, as... Figure 2 As shown, the circumferential edge of the second protrusion 31 can be aligned with the circumferential edge of the first window 11.

[0030] The coil spring assembly 40 includes a first coil spring 41 and a second coil spring 42 connected in series via a first protrusion 21. The free ends of the first coil spring 41 and the second coil spring 42 respectively form abutment fits with the circumferential inner wall of their respective adjacent second protrusion 31 or first window 11.

[0031] like Figure 2 As shown, according to the structure of the torsional vibration damper of this disclosure, when torque is transmitted from the engine side to the transmission side in the forward direction, the torque transmission path is: cover plate assembly 10 → first coil spring 41 (as shown). Figure 2 (as shown by the left spring) → the first protrusion 21 of the middle flange 20 → the second coil spring 42 (as shown by the left spring) Figure 2 (shown as the right-side spring) → the second protrusion 31 of the single main flange 30, the single main flange 30 begins to rotate and eventually transmits torque to the hub.

[0032] Compared to the asymmetrical double-main-flange structure with two axial sides of the intermediate flange 20, this disclosure uses only one main flange (i.e., a single main flange 30), reducing the number of main flanges and consequently the number of components in the torsional vibration damper 101. This structural change alters the torque transmission sequence; the torque of the cover plate assembly 10 is transmitted to the single main flange 30 via the coil spring assembly 40 and the intermediate flange 20. This allows the maximum relative rotation angle between the single main flange 30 and the cover plate assembly 10 to be limited by the second protrusion 31 of the single main flange 30 and the stop 15 on the cover plate assembly 10, solving the technical problem that the maximum rotation angle is typically determined by the meshing clearance between the internal teeth of the main flange and the external teeth of the hub. Furthermore, the change in the torque transmission path results in lower hysteresis and faster torque transmission response in the torsional vibration damper 101.

[0033] By dividing the coil springs within a single window into dual coil springs arranged in series, the circumferential length of a single coil spring within the same window can be reduced, while the outer diameter of a single coil spring can be increased. This effectively improves the stiffness of a single coil spring while maintaining good elastic deformation capacity, ensuring that the damping stiffness requirements of the torsional vibration damper 101 are met. The second protrusion 31 of the intermediate flange 20 is used to connect the first coil spring 41 and the second coil spring 42 in series, enabling the two coil springs to work together. This reduces the risk of bending deformation of a single coil spring when transmitting torque, improving the stability and durability of the torsional vibration damper 101.

[0034] In some embodiments, such as Figure 2 As shown, the radially outer end of the second protrusion 31 extends along both sides of the circumference to form a symmetrical first wing 32, making the second protrusion 31 T-shaped. This effectively improves the bending strength of the second protrusion 31 and prevents plastic deformation when the first wing 32 collides with the stop member 15. The radially inner wall of the first wing 32 can be flush with the radially outer inner wall of the first window 11. The circumferential extension of the first wing 32 can provide radial support for the coil spring assembly 40, preventing the coil spring assembly 40 from bending under pressure during torque transmission. The symmetrical extension of the first wing 32 makes the circumferential W force more uniform, and the first wing 32 can also counteract the centrifugal force during rotation, so that the single main flange 30 does not require additional counterweight, ensuring the smooth torque transmission of the single main flange 30.

[0035] The end face of the cover plate assembly 10 is provided with the aforementioned stop 15. The stop 15 can be a limiting block, a boss, or a pin, etc. In the exemplary embodiment of this disclosure, the single main flange 30 is provided with three second protrusions 31 in the circumferential direction, and the cover plate assembly 10 is provided with three stop 15 in the circumferential direction. The stop 15 and the second protrusions 31 are arranged crosswise in the circumferential direction, so that the first wings 32 symmetrically arranged on both sides of the circumferential direction of the stop 15 and the second protrusions 31 form a bidirectional stop mechanism, which limits the maximum rotation angle of the single main flange 30 relative to the cover plate assembly 10 and ensures that the rotation angle of the single main flange 30 is always within a safe range.

[0036] When the single main flange 30 rotates forward relative to the cover plate assembly 10 (engine drive direction), the second protrusion 31 circumferentially moves to one side (e.g., Figure 2 The first wing 32 (on the clockwise side shown) contacts the stop 15, preventing further rotation of the single main flange 30. Under the action of reverse torque (such as braking or coasting conditions), the second protrusion 31 circumferentially moves to the other side (such as... Figure 2 The first wing 32 (on the clockwise side shown) abuts against another stop 15 to prevent the single main flange 30 from over-rotating. In addition, by adjusting the circumferential position of the stop 15, the maximum allowable rotation angle can be flexibly set to prevent the coil spring assembly 40 from failing due to over-compression.

[0037] In some embodiments, such as Figure 4 As shown, the intermediate flange 20 includes a first intermediate flange 22 and a second intermediate flange 23 arranged axially A, as follows: Figure 2 and Figure 4 As shown, the first protrusion 21 of the first intermediate flange 22 and the first protrusion 21 of the second intermediate flange 23 are fixed and torsional connected by the first rivet 24, ensuring that the first intermediate flange 22 and the second intermediate flange 23 can rotate synchronously and in the same direction, and the rivet connection method ensures the overall rigidity of the intermediate flange 20. The first cover plate 12 is located on one side of the first intermediate flange 22, and the second cover plate 13 is located on one side of the second intermediate flange 23.

[0038] The single main flange 30 is positioned axially between the first intermediate flange 22 and the second intermediate flange 23, and the second protrusion 31 of the single main flange 30 is located circumferentially between the two first rivets 24, ensuring that the single main flange 30 can rotate within the allowable rotation angle range.

[0039] like Figure 2As shown, protrusions 211 are symmetrically arranged on both sides of the first protrusion 21 of the intermediate flange 20. The protrusions 211 on both sides are respectively inserted into the first coil spring 41 and the second coil spring 42 to prevent the first coil spring 41 and / or the second coil spring 42 from shifting or dislodging relative to the first protrusion 21 of the intermediate flange 20 when subjected to torque, so that the first protrusion 21 of the intermediate flange 20 is reliably connected to the first coil spring 41 and the second coil spring 42 respectively.

[0040] In some embodiments, such as Figure 2 As shown, a metal support plate 25 is provided on the radially outer side of the intermediate flange 20. The support plate 25 is riveted and fixed to the first protrusion 21 of the first intermediate flange 22 and the first protrusion 21 of the second intermediate flange 23 on both axial sides, thereby significantly enhancing the overall structural strength of the intermediate flange 20.

[0041] In some embodiments, the radially outer end of the support plate 25 extends along both sides of the circumferential W to form a symmetrical second wing 251, making the support plate 25 T-shaped. The radially inner wall of the second wing 251 is aligned with the radially outer inner wall contour of the first window 11, which not only provides stable radial support for the coil spring assembly 40, but also controls the centrifugal force generated by the coil spring assembly 40 under rotational conditions, ensuring the stability of the coil spring assembly 40 under rotational conditions.

[0042] In some embodiments, an end isolator 43 is provided between the free end of the first coil spring 41 and / or the second coil spring 42 and the circumferential sidewall of the first window 11. The end isolator 43 can effectively isolate the free end of the coil spring assembly 40 from direct contact with the circumferential inner wall, radial inner wall of the first window 11, and the circumferential sidewall of the second protrusion 31 of the single main flange 30, reducing friction and wear between them. In addition, the end isolator 43 can also act as a buffer, absorbing the impact generated during torque transmission, thereby effectively suppressing the impact noise between the coil spring assembly 40 and the inner wall of the first window 11 or the second protrusion 31, and effectively improving the NVH performance of the vehicle.

[0043] In some embodiments, such as Figure 4 As shown, the torsional vibration damper 101 also includes a friction washer 50 and a diaphragm spring 60. The friction washer 50 frictionally abuts against the axial side of the first intermediate flange 22 away from the second intermediate flange 23. The diaphragm spring 60 is pre-compressed and installed between the first cover plate 12 and the friction washer 50. The axial end face of the second intermediate flange 23 and the inner side of the second cover plate 13 form a direct metal contact surface.

[0044] Based on the same inventive concept, this disclosure provides a torque damping device 100. The specific manner in which the function of the torque damping device 100 in the above embodiments is implemented has been described in detail in the embodiments relating to the torsional vibration damper 101, and will not be elaborated here.

[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 models 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 examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0046] 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 torsional vibration damper (101), characterized in that, include: The cover plate assembly (10) has at least one first window (11) on its annular end face; The intermediate flange (20) is coaxially arranged with the cover plate assembly (10). The intermediate flange (20) is provided with a first protrusion (21) extending radially outward. In the initial state without torque, the circumferential center line of the first protrusion (21) coincides with the circumferential center line of the first window (11). A single main flange (30) is coaxially arranged with the intermediate flange (20). The single main flange (30) is provided with a second protrusion (31) extending radially outward. In the initial state without torque, the circumferential position of the second protrusion (31) is aligned with the circumferential edge of the first window (11). The coil spring assembly (40) includes a first coil spring (41) and a second coil spring (42) located in the first window (11) and connected in series through the first protrusion (21), wherein the free ends of the first coil spring (41) and the free ends of the second coil spring (42) respectively form abutment engagement with two adjacent second protrusions (31); When transmitting torque in the forward direction, the torque is transmitted sequentially through the cover plate assembly (10), the first coil spring (41), the first protrusion (21) of the intermediate flange (20) and the second coil spring (42) to the second protrusion (31) of the single main flange (30).

2. The torsional vibration damper (101) according to claim 1, characterized in that, The radial outer end of the second protrusion (31) extends along both sides in the circumferential direction to form a symmetrical first wing (32), making the second protrusion (31) T-shaped; A stop (15) is provided on the end face of the cover plate assembly (10). The stop (15) and the first wing (32) form a stop mechanism to limit the maximum rotation angle of the single main flange (30) relative to the cover plate assembly (10).

3. The torsional vibration damper (101) according to claim 1, characterized in that, The intermediate flange (20) includes a first intermediate flange (22) and a second intermediate flange (23) arranged axially. The first protrusion (21) of the first intermediate flange (22) and the first protrusion (21) of the second intermediate flange (23) are fixedly connected by a first rivet (24). The single main flange (30) is disposed axially (A) between the first intermediate flange (22) and the second intermediate flange (23), and the second protrusion (31) of the single main flange (30) is located circumferentially (W) between the two first rivets (24).

4. The torsional vibration damper (101) according to claim 3, characterized in that, A support plate (25) is provided on the radial outer side of the intermediate flange (20), and the two axial sides of the support plate (25) are riveted to the first protrusion (21) of the first intermediate flange (22) and the first protrusion (21) of the second intermediate flange (23).

5. The torsional vibration damper (101) according to claim 4, characterized in that, The radial outer end of the support plate (25) extends along both sides in the circumferential direction to form a symmetrical second wing (251), making the support plate T-shaped, and the second wing (251) is aligned with the radial outer contour of the first window (11).

6. The torsional vibration damper (101) according to claim 1, characterized in that, An end separator (43) is provided between the free end of the first coil spring (41) and / or the second coil spring (42) and the circumferential sidewall of the first window (11).

7. The torsional vibration damper (101) according to any one of claims 1-6, characterized in that, The cover plate assembly (10) is provided with three first windows (11) evenly distributed in the circumference. Each first window (11) is provided with a set of coil springs. The intermediate flange (20) is provided with three first protrusions (21). The single main flange (30) is provided with three second protrusions (31). The first protrusions (21) and the second protrusions (31) are arranged crosswise in the circumference.

8. The torsional vibration damper (101) according to claim 3, characterized in that, The cover plate assembly (10) includes a first cover plate (12) and a second cover plate (13) that are axially opposite and fixedly connected. The first cover plate (12) is located on one side of the first intermediate flange (22), and the second cover plate (13) is located on one side of the second intermediate flange (23).

9. The torsional vibration damper (101) according to claim 8, characterized in that, The torsional vibration damper (101) further includes a friction washer (50) and a diaphragm spring (60). The friction washer (50) frictionally abuts against the side of the first intermediate flange (22) away from the second intermediate flange (23). The diaphragm spring (60) is pre-compressed and installed between the first cover plate (12) and the friction washer (50). The axial end face of the second intermediate flange (23) and the inner side of the second cover plate (13) form a direct metal contact surface.

10. A torque damping device (100), characterized in that, Includes the torsional vibration damper (101) as described in any one of claims 1-9.

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