High-damping stable tensioning wheel assembly

Abstract

The utility model discloses a high-damping stable tensioning wheel assembly which comprises a tensioning wheel and a swing arm, the tensioning wheel is rotatably installed at one end of the swing arm, a rotary cover body is installed at the other end of the swing arm through a hollow shaft, a torsion spring is arranged between the rotary cover body and the swing arm, a damping groove is further formed in the end face of the swing arm, and the damping groove is connected with the rotary cover body through the hollow shaft. A cylindrical positioning boss, a disc spring and a gasket are arranged in the damping groove, the damping sleeve is arranged on the positioning boss in a sleeving mode, the disc spring is annular, the circumferential wall of the disc spring is in a conical shape, U-shaped grooves which are evenly distributed in the circumferential direction are formed in the inner hole wall of the disc spring, the damping sleeve is matched with the positioning boss in a concave-convex inserted connection mode, and the rotary cover blocks a port of the damping groove and is connected to the hollow shaft. And the damping sleeve is in contact with the screw cap under the elastic action of the disc spring. U-shaped grooves in the disc springs have the effects of reducing rigidity and improving axial flexibility, so that the damping stability of the tensioning wheel assembly in the using process is better.

Description

Technical Field

[0001] The utility model relates to a transmission component on an automobile engine, in particular to a high-damping and stable tension wheel assembly. Background Art

[0002] The tensioner is a tensioning device for belt transmission. When the center distance of the belt cannot be adjusted, the tensioner can be used to tension the belt. The tensioner is a follower wheel that presses on the belt to change the wrap angle of the pulley or control the tension of the belt. It is a tensioning device for belt transmission.

[0003] The gear train on the engine is driven by a belt, and the tensioner is also in the gear train. Since the operation of the engine will produce angular vibration, the tensioner is needed to suppress this vibration. The damping parts in the tensioner will wear out faster due to suppressing the vibration. These damping parts exist to prevent the tensioner from swinging too fast. The worn damping parts will cause the tensioner to react too quickly, causing the belt to jump, resulting in unstable belt drive and even causing the belt to fall off. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide a high damping stable tensioning wheel assembly with good damping stability.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-damping and stable tensioning wheel assembly, comprising a tensioning wheel and a swing arm, the tensioning wheel being rotatably mounted on one end of the swing arm, and a rotating cover body being mounted on the other end of the swing arm through a hollow shaft, a torsion spring being arranged between the rotating cover body and the swing arm, and a damping groove being also arranged on the end surface of the swing arm, the hollow shaft passing through the center of the damping groove, a disc spring, a gasket, a damping sleeve and a rotary cover being sequentially arranged from the inside to the outside in the damping groove, a cylindrical positioning boss being arranged in the damping groove, the disc spring, the gasket and the damping sleeve being sleeved on the positioning boss, the disc spring being annular and the peripheral wall being conical, the inner hole wall of the disc spring being provided with "U"-shaped grooves uniformly distributed around the circumference, the damping sleeve being plug-in-matched with the positioning boss, the rotary cover blocking the port of the damping groove and being connected to the hollow shaft, and the damping sleeve being in contact with the rotary cover under the elastic action of the disc spring.

[0006] The inner ring of the damping sleeve is provided with a raised square guide block, and the outer wall of the positioning boss is provided with a guide groove matched with the square guide block.

[0007] The peripheral wall of the damping sleeve is also provided with heat dissipation holes evenly distributed around the circumference, and the heat dissipation holes are arc-shaped.

[0008] The beneficial effect is: since the damping sleeve contacts the rotary cover under the elastic action of the disc spring, friction is formed, which plays a damping role in the swing of the swing arm, and the continuous friction of the rotary cover on the damping sleeve during the rotation process will cause the damping sleeve to produce wear, so that continuous compensation is carried out through the elasticity of the disc spring, and the "U"-shaped groove on the disc spring reduces the rigidity and improves the axial stretchability, so that the damping stability of the tensioner assembly during use is better.

[0009] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A three-dimensional diagram of a specific implementation of the utility model;

[0011] Figure 2 It is a partial cutaway view of a specific implementation mode of the utility model;

[0012] Figure 3 It is a three-dimensional diagram of a disc spring in a specific implementation mode of the utility model;

[0013] Figure 4 It is a three-dimensional diagram of the damping sleeve in a specific implementation manner of the utility model. DETAILED DESCRIPTION

[0014] The present invention is specifically described below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the protection scope of the present invention.

[0015] like Figure 1 — Figure 4 As shown, this embodiment discloses a high-damping and stable tension wheel assembly, including a tension wheel 1 and a swing arm 2. The tension wheel 1 can be rotatably mounted on one end of the swing arm 2. A rotating cover body 4 is mounted on the other end of the swing arm 2 through a hollow shaft 3. A torsion spring 6 is arranged between the rotating cover body 4 and the swing arm 2. A damping groove 5 is also arranged on the end surface of the swing arm 2. The hollow shaft 3 passes through the center of the damping groove 5. A disc spring 7, a washer 8, a damping sleeve are sequentially installed in the damping groove 5 from the inside to the outside. 9 and a rotary cover 10, a cylindrical positioning boss 11 is provided in the damping groove 5, a disc spring 7, a washer 8, and a damping sleeve 9 are sleeved on the positioning boss 11, the disc spring 7 is annular and the peripheral wall is conical, and a "U"-shaped groove 71 uniformly distributed around the circumference is provided on the inner hole wall of the disc spring 7, the damping sleeve 9 is engaged with the positioning boss 11 in a concave-convex plug-in manner, the rotary cover 10 blocks the port of the damping groove 5 and is connected to the hollow shaft 3, and the damping sleeve 9 contacts with the rotary cover 10 under the elastic action of the disc spring 7.

[0016] The inner ring of the damping sleeve 9 is provided with a raised square guide block 91, and the outer wall of the positioning boss 11 is provided with a guide groove adapted to the square guide block 91. This structure can make the damping sleeve 9 more reliably axially positioned to prevent it from rotating.

[0017] The damping sleeve 9 is also provided with circumferentially uniformly distributed heat dissipation holes 92 on its peripheral wall, and the heat dissipation holes 92 are arc-shaped. The friction between the damping sleeve 9 and the rotary cover 10 will generate a large amount of heat, and the heat dissipation holes 92 can quickly dissipate the heat to maintain the best performance of the damping sleeve 9.

[0018] By adopting the above technical solution, the damping sleeve 9 contacts the rotary cover 10 under the elastic action of the disc spring 7, thereby forming friction, which plays a damping role in the swing of the swing arm 2. The continuous friction of the rotary cover 10 on the damping sleeve 9 during the rotation process will cause the damping sleeve 9 to produce wear, so that continuous compensation is carried out through the elasticity of the disc spring 7. The "U"-shaped groove on the disc spring 7 has the effect of reducing rigidity and improving axial telescopicity, so that the damping stability of the tensioner 1 assembly during use is better.

Claims

1. A high damping and stable tension wheel assembly, comprising a tension wheel and a swing arm, wherein the tension wheel is rotatably mounted on one end of the swing arm, a rotating cover is mounted on the other end of the swing arm through a hollow shaft, and a torsion spring is arranged between the rotating cover and the swing arm, characterized in that: A damping groove is also provided on the end surface of the swing arm, and the hollow shaft passes through the center of the damping groove. A disc spring, a washer, a damping sleeve and a rotary cover are installed in the damping groove from the inside to the outside in sequence. A cylindrical positioning boss is provided in the damping groove, and the disc spring, the washer and the damping sleeve are sleeved on the positioning boss. The disc spring is annular and has a conical peripheral wall. The inner hole wall of the disc spring is provided with "U"-shaped grooves uniformly distributed around the circumference. The damping sleeve is plug-fitted with the positioning boss in a concave-convex manner. The rotary cover blocks the port of the damping groove and is connected to the hollow shaft. The damping sleeve contacts the rotary cover under the elastic action of the disc spring.

2. The high damping stable tension wheel assembly according to claim 1 is characterized in that: The inner ring of the damping sleeve is provided with a raised square guide block, and the outer wall of the positioning boss is provided with a guide groove matched with the square guide block.

3. The high damping stable tension wheel assembly according to claim 1, characterized in that: The peripheral wall of the damping sleeve is also provided with heat dissipation holes evenly distributed around the circumference, and the heat dissipation holes are arc-shaped.

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