Asymmetric damping tensioning wheel with combined damping piece structure

Abstract

The utility model discloses an asymmetrical damping tensioning wheel with a combined damping piece structure, which is characterized by comprising a body, a spring, a combined damping piece and a support plate, a support plate limit structure is arranged on the support plate, the body is rotatably connected with the support plate, the spring is arranged between the body and the support plate, and the combined damping piece is arranged on the body. A combined damping part is further arranged between the body and the supporting plate, the outer side of the combined damping part is attached to the inner wall of the body, the two ends of the spring make contact with the body and the combined damping part respectively, the combined damping part is arranged on the supporting plate, and when the body and the supporting plate rotate relatively, the combined damping part moves along with the supporting plate. The spring and the combined damping piece generate damping between the body and the supporting plate. The tensioning wheel achieves large damping in the loading process and small damping in the unloading process, damping has asymmetry, and belt shaking can be effectively restrained.

Description

Technical Field

[0001] The utility model relates to a tensioning wheel, in particular to an asymmetric damping tensioning wheel with a combined damping component structure. Background Art

[0002] The tensioner is a belt tensioning device that allows the belt to have appropriate tension during the belt drive process. During the operation of the engine gear train, due to the switching of different working conditions and the torsional vibration of the engine, the belt tension will fluctuate and the tensioner will swing back and forth. If the tensioner damping is too large, it will cause the tensioner to return slowly or get stuck, and the belt cannot be tensioned quickly; if the tensioner damping is too small, it will cause the tensioner to swing too much and fail to effectively suppress the belt shaking.

[0003] However, in the dynamic working process of the engine gear train, the ordinary tensioner cannot achieve a large damping during loading and a small damping during unloading. Therefore, it is necessary to find a tensioner with large damping during loading and small damping during unloading to improve the dynamic performance to meet various working conditions. Utility Model Content

[0004] The purpose of the utility model is to provide an asymmetric damping tensioner with a combined damping member structure, so that the tensioner can achieve large damping during the loading process and small damping during the unloading process during operation, and at the same time, the tensioner has the advantages of high reliability, compact structure and low cost, so that it can meet various complex working conditions.

[0005] The utility model is implemented by adopting the following technical scheme: an asymmetric damping tensioner with a combined damping member structure, characterized in that it includes a main body, a spring, a combined damping member, and a support plate, a support plate limiting structure is arranged on the support plate, the main body is rotatably connected to the support plate, a spring is arranged between the main body and the support plate, and a combined damping member is also arranged between the main body and the support plate, the outer side of the combined damping member is in contact with the inner wall of the main body, the two ends of the spring are respectively in contact with the main body and the combined damping member, the combined damping member is arranged on the support plate, when the main body and the support plate generate relative rotation, the combined damping member moves with the support plate, and the spring and the combined damping member generate damping between the main body and the support plate.

[0006] Furthermore, a main body limiting surface is arranged on the inner top of the main body, and a support plate limiting structure is arranged on the support plate.

[0007] Furthermore, the combined damping component includes a damping ring and a damping block, one end face of the damping ring is damping ring end face one and the other end face is damping ring end face two, one end face of the damping block is damping block end face two and the other end face is damping block end face one, and the damping ring end face one is in contact with the damping block end face two.

[0008] Furthermore, one side end surface of the support plate limiting structure is a support plate limiting surface, and the support plate limiting surface is in contact with an end surface of the damping block.

[0009] Furthermore, one end of the spring contacts the second end surface of the damping block and the other end contacts the limiting surface of the body.

[0010] Furthermore, the damping ring includes a damping body 1 and a friction damping member 1, which are interlocked with each other, and the damping block includes a damping body 2 and a friction damping member 2, which are interlocked with each other, and the friction damping member 2 and the friction damping member 1 are both in contact with the inner wall of the body.

[0011] Furthermore, a damping ring limiting block is integrally connected to the inner side of the damping ring, and the damping ring limiting block is embedded in the support plate limiting structure, so that the damping ring and the support plate will not generate relative movement.

[0012] Furthermore, the body is rotatably connected to the support plate via a central shaft sleeve, and a sliding bearing is provided between the central shaft sleeve and the support plate.

[0013] The effective benefits of the utility model are: the tension wheel realizes large damping during loading and small damping during unloading, and the damping is asymmetric, which can effectively suppress the vibration of the belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0015] Figure 1 A schematic diagram of the structure of an asymmetric damping tensioner with a combined damping element structure;

[0016] Figure 2 Schematic diagram of support plate structure;

[0017] Figure 3 Schematic diagram of the damping block structure;

[0018] Figure 4 Schematic diagram of the damping ring structure;

[0019] Figure 5 Schematic diagram of the main structure;

[0020] Figure 6 Schematic diagram of the stress condition of the damping block during loading;

[0021] Figure 7Schematic diagram of the stress condition of the damping block during unloading;

[0022] Figure numerals: 1. body; 2. spring; 3. damping ring; 4. damping block; 5. support plate; 6. pulley; 7. sliding bearing; 8. center sleeve; 11. body limiting surface; 12. body inner wall; 31. friction damping element one; 32. damping body one; 41. friction damping element two; 42. damping body two; 51. support plate limiting structure; 52. support plate limiting surface; 321. damping ring end face one; 322. damping ring end face two; 323. damping ring limiting block; 421. damping block end face one; 422. damping block end face two. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1-7 As shown, an asymmetric damping tensioner with a combined damping member structure comprises: a body 1, a spring 2, a combined damping member (3, 4), a support plate 5, a pulley assembly 6, a sliding bearing 7, and a center sleeve 8. The support plate 5 has a support plate limiting structure 51, the combined damping member comprises a damping ring 3 and a damping block 4, which are installed in the support plate limiting structure 51, and the spring 2 is installed between the body limiting surface 11 and the damping block limiting surface 422.

[0026] The support plate 5 has a combined damping element limiting structure 51, and the combined damping element (3, 4) is installed in the support plate limiting structure 51.

[0027] The combined damping member comprises a damping ring 3 and a damping block 4. The combined damping member is installed between the body 1 and the spring 2. Both the damping ring 3 and the damping block 4 have a damping body and a friction damping member.

[0028] The damping body 1 32 and the friction damping member 1 31 are embedded and fitted with each other, the damping ring end face 2 322 is a non-connected surface, and the damping ring limit block 323 is fixed inside the damping body 1 32 and embedded in the support plate limit structure 51 to ensure that the damping ring 3 will not move relative to the support plate 5. At the same time, the damping body 2 42 and the friction damping member 2 41 are embedded and fitted with each other, the damping block end face 1 421 is in contact with the support plate limit face 52, the damping block end face 2 422 is in contact with the damping ring end face 1 321, and the damping block end face 2 422 is also in contact with one end of the spring.

[0029] The spring 2 is installed between the second end surface 422 of the damping block and the limiting surface 11 of the main body, one end of the spring contacts the second end surface 422 of the damping block, and the other end surface of the spring contacts the limiting surface 11 of the main body.

[0030] The damping ring 3 and the damping block 4 produce damping by friction with the inner wall 12 of the main body. The asymmetry of the damping is mainly produced by the friction between the damping block 4 and the inner wall 12 of the main body.

[0031] The forces acting on the damping block 4 are simplified. The second end face 422 of the damping block is subjected to the spring force F1, the first end face 421 of the damping block is subjected to the support plate force F2, the main body exerts a force N on the damping block, and the friction process generates a friction damping force f, and the four forces are balanced.

[0032] During the tensioner loading process, the support plate pushes the damping block and the spring to rotate, that is, F2 overcomes the spring torque and friction damping, and F2 is equivalent to the active force; during the tensioner unloading process, the spring pushes the damping block and the support plate to rotate, that is, the spring force overcomes F1 and friction damping, and F2 is equivalent to the passive force. At the same position, F2 during the loading process is greater than F2 during the unloading process. According to the force balance, the friction damping f generated during the loading process is greater than the friction damping f generated during the unloading process, realizing the asymmetry of the tensioner damping, and realizing that the tensioner has a large damping during the loading process and a small damping during the unloading process.

[0033] The above embodiments describe the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the changes and modifications made by the technicians in this field shall be within the scope of protection of the claims attached to the utility model.

Claims

1. An asymmetric damping tensioner with a combined damping element structure, characterized in that: The invention comprises a body (1), a spring (2), a combined damping member, and a support plate (5); a support plate limiting structure (51) is arranged on the support plate (5); the body (1) and the support plate (5) are rotatably connected; a spring (2) is arranged between the body (1) and the support plate (5); a combined damping member is also arranged between the body (1) and the support plate (5); the outer side of the combined damping member is in contact with the inner wall (12) of the body; two ends of the spring (2) are respectively in contact with the body (1) and the combined damping member; the combined damping member is arranged on the support plate (5); when the body (1) and the support plate (5) rotate relative to each other, the combined damping member moves with the support plate (5); and the spring (2) and the combined damping member generate damping between the body (1) and the support plate (5).

2. The asymmetric damping tensioner with a combined damping element structure according to claim 1, characterized in that: A body limiting surface (11) is provided on the inner top of the body (1).

3. The asymmetric damping tensioner with a combined damping element structure according to claim 2, characterized in that: The combined damping component comprises a damping ring (3) and a damping block (4); an end face on one side of the damping ring (3) is a damping ring end face 1 (321) and an end face on the other side is a damping ring end face 2 (322); an end face on one side of the damping block (4) is a damping block end face 2 (422) and an end face on the other side is a damping block end face 1 (421); and the damping ring end face 1 (321) is in contact with the damping block end face 2 (422).

4. The asymmetric damping tensioner with a combined damping element structure according to claim 3, characterized in that: One end surface of the support plate limiting structure (51) is a support plate limiting surface (52), and the support plate limiting surface (52) is in contact with an end surface (421) of the damping block.

5. The asymmetric damping tensioner with a combined damping element structure according to claim 4, characterized in that: One end of the spring (2) contacts the second end surface (422) of the damping block, and the other end contacts the limiting surface (11) of the body.

6. The asymmetric damping tensioner with a combined damping element structure according to claim 5, characterized in that: The damping ring (3) comprises a damping body (32) and a friction damping member (31), the damping body (32) and the friction damping member (31) being interlocked with each other; the damping block (4) comprises a damping body (42) and a friction damping member (41), the damping body (42) and the friction damping member (41) being interlocked with each other; the friction damping member (41) and the friction damping member (31) are both in contact with the inner wall (12) of the body.

7. The asymmetric damping tensioner with a combined damping element structure according to claim 5, characterized in that: A damping ring limiting block (323) is integrally connected to the inner side of the damping ring (3), and the damping ring limiting block (323) is embedded in the support plate limiting structure (51), so that the damping ring (3) and the support plate (5) do not generate relative movement.

8. The asymmetric damping tensioner with a combined damping element structure according to claim 1, characterized in that: The body (1) is rotatably connected to the support plate (5) via a central shaft sleeve (8), and a sliding bearing (7) is provided between the central shaft sleeve (8) and the support plate (5).

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