High-damping balance force accessory tensioner

Abstract

The utility model discloses a high-damping balance force accessory tensioner, which comprises a shell, a shaft core, a swing arm and a belt pulley, the shaft core is arranged in the shell, a rotary drum is arranged at one end of the swing arm, the rotary drum is rotatably sleeved on the shaft core, the belt pulley is arranged at the other end of the swing arm, and the high-damping balance force accessory tensioner is characterized in that a spring is arranged between the rotary drum and the shell, and the shaft core is arranged in the shell. One end of the spring is connected to the rotary drum, the other end of the spring is connected to the shell, the torsion moment direction of the spring is parallel to the stress direction of the gear train, the rotary drum is sleeved with a damping sleeve, the damping sleeve is sleeved with the spring, a hoop is further arranged between the spring and the damping sleeve, and the hoop is tightly arranged on the lower portion of the damping sleeve in a sleeved mode. The upper end of the hoop is a spiral rising face matched with the spiral direction of the spring. By improving the layout angle of the spring, abnormal sound and service life attenuation caused by deflection of the belt pulley are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the improvement of a tensioner, in particular to the improvement of a high-damping balanced force accessory tensioner. BACKGROUND

[0002] During installation, the layout angle of the spring is determined by the connection position of the two ends of the spring, usually one end of the spring is connected to the rotating end of the swing arm to determine the damping size of the spring, and the other end of the spring is connected to the shell to determine the torsional moment direction of the spring, which is usually randomly set, and when the torsional moment direction of the spring is not parallel to the force direction of the wheel train, the tensioner cannot balance the overturning, which causes the pulley to deviate and emit abnormal noise during the operation of the tensioner, and shortens the service life. SUMMARY

[0003] The utility model solves the technical problem of overcoming the prior art, and provides a high-damping balanced force accessory tensioner.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme to realize it: the high-damping balanced force accessory tensioner, including the shell, the shaft core, the swing arm and the pulley, the shaft core is arranged in the shell, one end of the swing arm is provided with the rotating drum, the rotating drum is rotatably sleeved on the shaft core, the pulley is arranged at the other end of the swing arm, characterized by: the rotating drum and the shell are provided with the spring, one end of the spring is connected to the rotating drum, the other end of the spring is connected to the shell, and the torsional moment direction of the spring is parallel to the force direction of the wheel train, the rotating drum is sleeved with the damping sleeve, the spring is sleeved on the damping sleeve, and the clamp is further arranged between the spring and the damping sleeve, the clamp is tightly sleeved on the lower part of the damping sleeve, and the upper end of the clamp is a spiral raised surface matched with the spiral direction of the spring.

[0005] The upper end of the clamp is provided with a plurality of limiting openings, and the corresponding outer circle of the rotating drum is provided with a limiting protrusion matched with the limiting opening.

[0006] The connecting point of the spring on the shell and the center line of the shell are perpendicular to the connecting line of the wrap angle center of the belt on the pulley and the center of the pulley.

[0007] The improved high-damping balanced force accessory tensioner can adjust the damping size of the tensioner by setting the parameters of the spring and the damping sleeve, and the torsional moment direction of the spring is parallel to the force direction of the wheel train through the layout angle of the spring, so as to balance the overturning of the tensioner, so that the tensioner can still work normally during work, thereby reducing the abnormal noise and life attenuation caused by the deviation of the pulley. BRIEF DESCRIPTION OF DRAWINGS

[0008] The specific implementation of the utility model will be further described in combination with the drawings.

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] Figure 2 This is a top view of the structure of this utility model.

[0011] Figure 3 This utility model Figure 2 AA sectional view.

[0012] Figure 4 This is a layout diagram of the present invention in a gear train. Detailed Implementation

[0013] The accompanying drawings illustrate the structure of this utility model, and further details will be described below with reference to the drawings. In this embodiment, see the attached drawings. Figures 1-4 The high-damping balancing force attachment tensioner includes a housing 1, a shaft core 2, a swing arm 3, and a pulley 4. The shaft core 2 is disposed inside the housing 1. One end of the swing arm 3 is provided with a rotating cylinder 5, which is rotatably sleeved on the shaft core 2. The upper end of the shaft core 2 is provided with a riveting plate 10, which limits the position of the rotating cylinder 5. A central sleeve 6 is provided between the rotating cylinder 5 and the shaft core 2. The pulley 4 is disposed at the other end of the swing arm 3. A spring 7 is provided between the rotating cylinder 5 and the housing 1. One end of the spring 7 is connected to the rotating cylinder 5, and the other end of the spring 7 is connected to the housing 1. The torsional torque direction of the spring 7 is parallel to the force direction of the gear train. A damping sleeve 8 is sleeved on the rotating cylinder 5, and the spring 7 is sleeved on the damping sleeve 8. A clamp 9 is also provided between the spring 7 and the damping sleeve 8. The clamp 9 is tightly sleeved on the lower part of the damping sleeve 8, and the upper end of the clamp 9 is a spiral rising surface adapted to the helical direction of the spring.

[0014] The principle of this invention is to rationally select the position on the housing 1 where the spring 7 is connected, so that the torsional torque direction of the spring 7 is parallel to the force direction of the gear train, so as to balance the rotation of the tensioner and ensure that the tensioner can still work normally during operation. This reduces the abnormal noise and lifespan reduction caused by the wobble of the pulley 4. At the same time, the damping sleeve 8 is equipped with a clamp 9 with a spiral rising surface. The spiral rising surface is adapted to the shape of the spring 7 during the torsion process. The clamp 9 is used to balance the force acting on the damping sleeve 8 and avoid the local force generated by the direct line contact between the spring 7 and the damping sleeve 8.

[0015] As a further improved specific implementation, the upper end of the clamp 9 is provided with several limiting openings, and the outer circle of the corresponding rotating cylinder 5 is provided with limiting protrusions. The limiting protrusions cooperate with the limiting openings to restrict the clamp 9 from rotating and moving axially on the rotating cylinder 5.

[0016] As a further improved embodiment, the connecting point of the spring 7 on the housing 1 is perpendicular to the line connecting the center of the belt on the pulley 4 and the center of the pulley 4, so that the torsion moment direction of the spring 7 is parallel to the force direction of the wheel train.

[0017] To sum up, the above is only the preferred embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-damping balanced force accessory tensioner comprising a housing, a shaft core, a swing arm and a pulley, the shaft core is arranged in the housing, one end of the swing arm is provided with a rotating drum, the rotating drum is rotatably sleeved on the shaft core, and the pulley is arranged at the other end of the swing arm, characterized in that: The spring is connected to the rotary drum at one end and connected to the shell at the other end, and the torsional moment direction of the spring is parallel to the force direction of the wheel system. ​ 2. The high-damping counterbalance accessory tensioner of claim 1, wherein: The upper end of the clamp is provided with a plurality of limiting openings, and the outer circle of the rotary drum is provided with limiting protrusions corresponding to the limiting openings.

3. The high-damping counterbalance force accessory tensioner of claim 1, wherein: The connecting point of the spring on the shell is perpendicular to the line connecting the wrap angle center of the belt on the belt pulley and the center of the belt pulley.

Images