Flat type automatic tensioning wheel

Abstract

The utility model discloses a flat type automatic tensioning wheel. Comprising a wheel rocker arm, a base, a spring mechanism, a damping mechanism and a belt wheel mechanism. The wheel rocker arm is provided with a belt wheel mechanism, the base is provided with a pivot, the wheel rocker arm and the damping mechanism are respectively sleeved on the pivot, and the wheel rocker arm is connected with the base through a spring mechanism; the spring mechanism comprises a spring, fixing grooves and a wheel rocker arm, the fixing grooves are formed in the base respectively, the fixing grooves in the wheel rocker arm and the fixing grooves in the base are oppositely arranged, hook heads at the two ends of the spring are fixed in the corresponding fixing grooves respectively, the spring is perpendicular to the pivot, and the fixing grooves in the wheel rocker arm and the belt wheel mechanism are located at the two ends of the wheel rocker arm respectively. The axial tension of the spring and the external force borne by the belt wheel mechanism are balanced; the wheel rocker arm makes contact with the damping structure, and mechanical friction damping is generated through friction. The spring mechanism is designed to be flat, so that the axial height of the automatic tensioning wheel is greatly reduced, and the automatic tensioning wheel is convenient to install and arrange.

Description

Technical fields:

[0001] This utility model belongs to the technical field of automatic tensioner processing for internal combustion engine accessory belt systems, and specifically relates to a flat automatic tensioner. Background technology:

[0002] The automatic tensioner is a crucial component of the accessory belt system in internal combustion engines. In current designs, the coil spring or spiral spring of the spring mechanism is often housed within the cavity enclosed by the wheel rocker arm and base. This results in a relatively high tensioner body, typically 50-70mm, occupying a significant amount of space. This makes installation difficult when the space around the engine is limited. Therefore, reducing the height of the automatic tensioner body to facilitate installation is a problem that needs to be addressed.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content:

[0004] The purpose of this invention is to provide a flat automatic tensioning wheel, thereby overcoming the defects in the prior art.

[0005] To achieve the above objectives, this utility model provides a flat automatic tensioning wheel, comprising a wheel rocker arm, a base, a spring mechanism, a damping mechanism, and a pulley mechanism. The pulley mechanism is mounted on the wheel rocker arm, and a pivot is mounted on the base. The wheel rocker arm and the damping mechanism are respectively mounted on the pivot, and the wheel rocker arm and the base are connected by the spring mechanism. The spring mechanism includes a spring and a fixing groove. Fixing grooves are respectively provided on the wheel rocker arm and the base, with the fixing grooves on the wheel rocker arm and the base being opposite each other. Hooks at both ends of the spring are fixed in their respective fixing grooves. The spring is perpendicular to the pivot. The fixing grooves on the wheel rocker arm and the pulley mechanism are located at opposite ends of the wheel rocker arm, and the axial tension of the spring and the external force borne by the pulley mechanism are balanced. The wheel rocker arm contacts the damping structure, generating mechanical friction damping through friction.

[0006] Preferably, in the technical solution, the base includes a base body and a connecting part, one end of the base body is connected to the connecting part, a pivot is provided on the base body, and a fixing groove is provided on the bottom surface of the connecting part.

[0007] Preferably, in the technical solution, a hanging rod is provided in the fixing groove, and the hooks at both ends of the spring are respectively hung on the hanging rod of the corresponding fixing groove for fixation.

[0008] Preferably, in the technical solution, the damping mechanism includes a damping unit, a cover plate, and a bushing. The bushing is fitted onto a pivot, and the wheel rocker arm and the damping unit are respectively fitted onto the bushing. The cover plate is locked onto the pivot and is located above the damping unit. The damping unit is an elastic element, and the bushing is provided with a flange surface. The bottom surface of the flange surface contacts the base, and the top and bottom surfaces of the wheel rocker arm contact the damping unit and the flange surface, respectively. The cover plate presses the damping unit onto the top surface of the wheel rocker arm. During the circumferential swing of the wheel rocker arm, the wheel rocker arm rubs against the flange surface and the damping unit, generating mechanical friction damping.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] By flattening the spring mechanism design and replacing the original inner cavity design enclosed by the wheel rocker arm and base, the axial dimension of the automatic tensioning wheel is greatly reduced, and the axial height of the automatic tensioning wheel can be reduced to less than 35mm, which reduces the installation space occupied and facilitates installation and layout. Attached image description:

[0011] Figure 1 This is a schematic diagram of the flat automatic tensioning wheel structure of this utility model;

[0012] Figure 2 This is a top view of the flat automatic tensioning wheel of this utility model;

[0013] Figure 3 for Figure 2 Sectional view along axis AA;

[0014] Figure 4 for Figure 2 BB-direction sectional view;

[0015] Figure 5 This is a schematic diagram of the wheel rocker arm structure of this utility model;

[0016] Figure 6 This is a schematic diagram of the base structure of this utility model. Detailed implementation method:

[0017] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0018] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0019] like Figure 1-6As shown, a flat automatic tensioning wheel includes a wheel rocker arm 1, a base 2, a spring mechanism 3, a damping mechanism 4, and a pulley mechanism 5. The wheel rocker arm 1 is equipped with the pulley mechanism 5. The base 2 includes a seat body 20 and a connecting part 21. One end of the seat body 20 is connected to the connecting part 21. A pivot 22 is provided on the seat body 20. A fixing groove 31 is provided on the bottom surface of the connecting part 21. The wheel rocker arm 1 and the damping mechanism 4 are respectively mounted on the pivot 20. The wheel rocker arm 1 and the base 2 are connected by the spring mechanism 3. The spring mechanism 3 includes a spring 30 and a fixing groove 31. The wheel rocker arm 1 and the base 2 are respectively equipped with… The fixed groove 31 on the wheel rocker arm 1 is opposite to the fixed groove 31 on the base 2. A hanging rod 32 is provided in the fixed groove 31. The hooks at both ends of the spring 30 are respectively hung on the hanging rod 32 of the corresponding fixed groove 31 and fixed. The spring 30 is perpendicular to the pivot 22. The fixed groove 31 on the wheel rocker arm 1 and the pulley mechanism 5 are respectively located at both ends of the wheel rocker arm 1. When working, the belt pushes the pulley mechanism 5 to apply an external force upward. The external force pulls the spring 30 downward through the other end of the wheel rocker arm 1. The axial tension of the spring 30 and the external force borne by the pulley mechanism 5 are balanced. The belt tension is achieved by means of the axial tension of the spring 30.

[0020] The damping mechanism 4 includes a damping unit 40, a cover plate 41, and a bushing 42. The bushing 42 is fitted onto the pivot 22. The wheel rocker arm 1 and the damping unit 40 are respectively fitted onto the bushing 42. The cover plate 41 is locked onto the pivot 22 and is located above the damping unit 40. The damping unit 40 is an elastic element. The bushing 42 is provided with a flange surface 43. The bottom surface of the flange surface 43 contacts the base 2. The top and bottom surfaces of the wheel rocker arm 1 are in contact with the damping unit 40 and the flange surface 43, respectively. The cover plate 41 presses the damping unit 40 against the top surface of the wheel rocker arm 1. During the circumferential swing of the wheel rocker arm 1, the wheel rocker arm 1 rubs against the flange surface 43 and the damping unit 40, generating mechanical friction damping.

[0021] By flattening the spring mechanism 3 and replacing the original inner cavity design of the wheel rocker arm and base, the axial dimension of the automatic tensioning wheel is greatly reduced, and the axial height of the automatic tensioning wheel can be reduced to less than 35mm, which reduces the installation space occupied and facilitates installation and layout.

[0022] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A flat automatic tensioning wheel, characterized in that: The device includes a wheel rocker arm, a base, a spring mechanism, a damping mechanism, and a pulley mechanism. The wheel rocker arm is equipped with the pulley mechanism, and the base is equipped with a pivot. The wheel rocker arm and the damping mechanism are respectively mounted on the pivot. The wheel rocker arm and the base are connected by the spring mechanism. The spring mechanism includes a spring and a fixing groove. The wheel rocker arm and the base are respectively provided with fixing grooves, which are opposite to each other. The hooks at both ends of the spring are fixed in their respective fixing grooves. The spring is perpendicular to the pivot. The fixing groove on the wheel rocker arm and the pulley mechanism are located at opposite ends of the wheel rocker arm. The axial tension of the spring and the external force borne by the pulley mechanism are balanced. The wheel rocker arm contacts the damping structure, generating mechanical friction damping through friction.

2. The flat automatic tensioning wheel according to claim 1, characterized in that: The base includes a base body and a connecting part. One end of the base body is connected to the connecting part. A pivot is provided on the base body, and a fixing groove is provided on the bottom surface of the connecting part.

3. The flat automatic tensioning wheel according to claim 2, characterized in that: A hanging rod is provided in the fixing groove, and the hooks at both ends of the spring are respectively hung on the hanging rod of the corresponding fixing groove for fixation.

4. The flat automatic tensioning wheel according to claim 1, characterized in that: The damping mechanism includes a damping unit, a cover plate, and a bushing. The bushing is fitted onto a pivot, and the wheel rocker arm and damping unit are respectively fitted onto the bushing. The cover plate is locked onto the pivot and is located above the damping unit. The damping unit is an elastic element. The bushing has a flange face. The bottom surface of the flange face contacts the base. The top and bottom surfaces of the wheel rocker arm contact the damping unit and the flange face, respectively. The cover plate presses the damping unit against the top surface of the wheel rocker arm. During the circumferential swing of the wheel rocker arm, the wheel rocker arm rubs against the flange face and the damping unit, generating mechanical friction damping.

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