Efficient anti-eccentric-wear tensioner

Abstract

The utility model belongs to the technical field of automobile parts, and particularly relates to an efficient anti-eccentric-wear tensioner which comprises a tensioning arm, a tensioning belt wheel body is installed at the top of the tensioning arm, a counter bore is formed in the bottom of the tensioning arm, a guide block is fixedly communicated with the top of the tensioning arm, the guide block is communicated with the counter bore, and the tensioning belt wheel body and the counter bore are connected through a bolt. A lining is inserted into the counter bore, the top end of the lining is attached to the inner wall of the top of the guide block, and a circular shaft is inserted into the lining. By arranging the tensioning arm, the counter bore, the guide block, the lining, the circular shaft, the circular cover, the supporting block, the damping buffer piece, the connecting block and the spring, in the using process of the eccentric wear prevention tensioner, the circular shaft can be limited after being tightly attached through cooperation of the supporting block and the connecting block, vibration generated when the tensioning arm works can be reduced through the damping buffer piece, and the service life of the circular shaft is prolonged. And under the cooperation of the spring, the inclination of the tensioning arm can be pressed, and the influence on the service life of the lining caused by eccentric wear of the lining is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a high-efficiency anti-eccentric wear tensioner. Background Art

[0002] The accessory wheel system of an automobile engine generally includes components such as belts, crankshaft pulleys, engine pulleys, compressor pulleys and idler pulleys. After working for a period of time, the belt is prone to relaxation due to elongation. At the same time, the original size of the belt will also change due to factors such as the different thermal expansion coefficients of the engine body and the belt, resulting in a decrease in the belt tension and violent shaking, and the working performance will decrease accordingly. Therefore, in order to ensure that the belt can reliably transmit motion and prevent the belt from slipping and wearing during operation, tensioners are widely used in automobile accessory wheel systems to adjust the belts. During use, the current tensioner can meet the tensioning force required by the engine under high-speed and low-speed conditions, but due to the uneven force of the tensioner in the wheel system and the entry of foreign matter into the bushing, the bushing will be worn eccentrically, which will affect its service life. Therefore, we have proposed a high-efficiency anti-eccentric wear tensioner to solve the above problems. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies of the prior art, the utility model provides a high-efficiency anti-eccentric wear tensioner, which solves the problems raised in the above-mentioned background technology.

[0005] (II) Technical solution

[0006] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0007] The cam is provided with a plurality of springs, each of which is provided with a plurality of springs, and the plurality of springs are connected to each other and are connected to a plurality of guide blocks, each of which is connected to a plurality of guide blocks.

[0008] Furthermore, a rubber layer is fixed on the surface of the circular shaft, and the outer surface of the rubber layer is tightly fitted with the inner surface of the bushing.

[0009] Furthermore, a rubber ring is fixed inside the through hole opened at the top of the circular cover, and the inner surface of the rubber ring is tightly fitted with the outer surface of the circular shaft.

[0010] Furthermore, an arc-shaped anti-skid plate is fixed to the outer wall of the circular cover in an annular shape.

[0011] (III) Beneficial effects

[0012] Compared with the prior art, the utility model provides a highly efficient anti-eccentric wear tensioner, which has the following beneficial effects:

[0013] The utility model provides a tensioning arm, a countersunk hole, a guide block, a bushing, a round shaft, a round cover, a support block, a damping buffer, a connecting block and a spring. During the use of the anti-eccentric wear tensioner, the cooperation of the support block and the connecting block can be utilized to limit the position of the round shaft after it is tightly fitted, and the damping buffer can reduce the vibration generated when the tensioning arm is working, and with the cooperation of the spring, the inclination of the tensioning arm can be suppressed, thereby preventing the bushing from being affected in its service life due to eccentric wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a cross-sectional view of the circular cover structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the connecting block structure of the utility model.

[0017] In the figure: 1. tensioning arm; 2. tensioning pulley body; 3. countersunk hole; 4. guide block; 5. bushing; 6. round shaft; 7. round cover; 8. support block; 9. damping buffer; 10. connecting block; 11. rubber layer; 12. rubber ring; 13. arc-shaped anti-skid plate; 14. spring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example

[0020] like Figure 1 , Figure 2 and Figure 3As shown, a high-efficiency anti-eccentric wear tensioner proposed in an embodiment of the utility model comprises a tensioning arm 1, a tensioning pulley body 2 is installed on the top of the tensioning arm 1, a countersunk hole 3 is opened at the bottom of the tensioning arm 1, a guide block 4 is connected and fixed to the top of the tensioning arm 1, the guide block 4 is connected to the countersunk hole 3, a bushing 5 is inserted in the inside of the countersunk hole 3, the top of the bushing 5 is fitted with the top inner wall of the guide block 4, a round shaft 6 is inserted in the inside of the bushing 5, a round cover 7 is clamped on the top of the tensioning arm 1, the top of the bushing 5 slides through the guide block 4 and the round cover 7 and extends above the two, a support block 8 is fixed to the top of the guide block 4 in an annular array, a damping buffer 9 is fixed to one side wall of the support block 8, and a damping buffer 9 is fixed to the other end. The connecting block 10 and one side wall of the connecting block 10 are tightly fitted with the surface of the circular shaft 6. A spring 14 is fixed on the top of the guide block 4. The top of the spring 14 is fixedly connected to the top inner wall of the circular cover 7. When using this anti-eccentric wear tensioner, after installing it in a suitable position, when the tensioning arm 1 is connected to the circular shaft 6, under the action of the four connecting blocks 10, it can be tightly fitted with the circular shaft 6 to limit the position. When the tensioning pulley body 2 is working and is pushed by the belt, it will cause the tensioning arm 1 to tilt slightly. However, under the action of the damping buffer 9 and the spring 14, the resilience of the two will suppress the tilt of the tensioning arm 1, thereby adjusting the tensioning arm 1 to avoid eccentric wear of the bushing 5.

[0021] like Figure 2 As shown, in some embodiments, a rubber layer 11 is fixed on the surface of the round shaft 6, and the outer surface of the rubber layer 11 is tightly fitted with the inner surface of the bushing 5. The rubber layer 11 can be set to make the bushing 5 and the round shaft 6 fit more closely. At the same time, the rubber layer 11 has a certain elasticity, thereby preventing foreign matter from entering the gap between the two.

[0022] like Figure 1 and Figure 2 As shown, in some embodiments, a rubber ring 12 is fixed inside the through hole opened at the top of the circular cover 7, and the inner surface of the rubber ring 12 is tightly fitted with the outer surface of the circular shaft 6. The provision of the rubber ring 12 can enhance the tightness of the fit between the circular cover 7 and the surface of the circular shaft 6, thereby preventing dust and the like from entering the interior of the circular cover 7.

[0023] like Figure 1 As shown, in some embodiments, an arc-shaped anti-slip plate 13 is fixed to the outer wall of the circular cover 7 in a ring shape. The arc-shaped anti-slip plate 13 can increase the friction between the hand and the surface of the circular cover 7, thereby making it more convenient to operate when removing the circular cover 7.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high-efficiency anti-eccentric wear tensioner, comprising a tensioning arm (1), characterized in that: A tension pulley body (2) is installed on the top of the tension arm (1), a countersunk hole (3) is opened at the bottom of the tension arm (1), a guide block (4) is connected and fixed to the top of the tension arm (1), the guide block (4) is connected to the countersunk hole (3), a bushing (5) is inserted into the inside of the countersunk hole (3), the top end of the bushing (5) is in contact with the top inner wall of the guide block (4), a round shaft (6) is inserted into the inside of the bushing (5), a round cover (7) is clamped on the top of the tension arm (1), and the top end of the bushing (5) is slidable. The guide block (4) and the circular cover (7) are movably connected to each other and extend to the top of the two. The top of the guide block (4) is fixed with a support block (8) in a circular array. A damping buffer (9) is fixed to one side wall of the support block (8). A connecting block (10) is fixed to the other end of the damping buffer (9). A side wall of the connecting block (10) is tightly fitted with the surface of the circular shaft (6). A spring (14) is fixed to the top of the guide block (4). The top end of the spring (14) is fixedly connected to the top inner wall of the circular cover (7).

2. The high-efficiency anti-eccentric wear tensioner according to claim 1 is characterized in that: A rubber layer (11) is fixed on the surface of the circular shaft (6), and the outer surface of the rubber layer (11) is tightly fitted with the inner surface of the bushing (5).

3. The high-efficiency anti-eccentric wear tensioner according to claim 1 is characterized in that: A rubber ring (12) is fixed inside the through hole opened at the top of the circular cover (7), and the inner surface of the rubber ring (12) is tightly fitted with the outer surface of the circular shaft (6).

4. The high-efficiency anti-eccentric wear tensioner according to claim 1 is characterized in that: The outer wall of the circular cover (7) is annularly provided with an arc-shaped anti-slip plate (13).

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