High-damping-stability and high-durability belt tensioning wheel

Abstract

The utility model discloses a high-damping-stability and high-durability belt tensioning wheel, and relates to the technical field of engine accessories. A mounting disc is arranged at the other end of the swing arm, a shaft tube is inserted into a mounting sleeve on the front side of the mounting disc, two ends of the shaft tube are respectively riveted with the connecting cover and a sealing cover, and a gasket and a torsion spring are arranged between the connecting cover and the mounting disc. The key point is that a damping structure is arranged between the sealing cover and the back surface of the mounting disc and comprises a belleville spring in the annular limiting groove, an elastic annular pad and a damping ring with a positioning block. The damping ring is in friction contact with the sealing cover under the elastic action of the belleville spring and the annular pad, and stable damping is provided to restrain the swing arm from swinging. After the damping ring is abraded, the elasticity of the belleville spring and the annular pad can be compensated, the damping force is kept constant, the problems that a common tensioning wheel is poor in durability and needs to be replaced frequently are solved, and the service life is remarkably prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering equipment engine accessory technology field especially relates to a high damping stability high endurance belt tension pulley for high -power engine belt drive system. BACKGROUND

[0002] In engineering equipment, the engine needs to be in high load state for a long time, and its power is generally high. The tension pulley is a key component in the engine belt drive system, and its main function is to maintain the proper tension of the belt and ensure the effective transmission of power.

[0003] For high-power engines, the power reserve is sufficient. Under the working condition of sudden acceleration or deceleration of the vehicle or equipment, the belt will instantaneously withstand a huge kinetic energy impact, causing the swing arm of the tension pulley to swing violently and greatly. This violent swing will significantly affect the stability and efficiency of the transmission system. The existing ordinary tension pulley usually adopts a simple mechanical structure or a single damping method. When facing such high-frequency and large-impact loads, the swing arm is prone to excessive swing due to insufficient damping, and the damping element is also prone to failure due to rapid wear, resulting in poor durability and the need for frequent replacement. This not only increases maintenance costs, but also greatly affects the overall service life and reliability of the engineering equipment. Therefore, how to design a tension pulley that can provide stable high damping and self-compensate for wear to extend the service life has become a technical problem to be solved in the field. SUMMARY

[0004] The utility model aims at overcoming the insufficient prior art, providing a high damping stability high endurance belt tension pulley, to solve the technical problem of the swing arm of the ordinary tension pulley swinging too much, low transmission efficiency, poor durability due to easy wear of the damping element, and the need for frequent replacement, which affects the service life of the equipment when the working condition of the high-power engine changes.

[0005] To achieve the above object, the utility model provides the following technical scheme: A high damping stability high durability belt tensioning wheel, including connecting cover, swing arm and pulley, the pulley is installed one end of swing arm, the other end of swing arm is provided with mounting disc, the middle part of mounting disc is provided with middle hole, the front surface of mounting disc is provided with the mounting sleeve of the protrusion along the middle hole, the rotatable shaft pipe is inserted in the mounting sleeve, the middle hole of connecting cover is riveted with one end of shaft pipe, the connecting cover is covered in the front surface of mounting disc, and the gasket is arranged between the opening end of connecting cover and the front surface of mounting disc, the torsional spring is arranged between the inner wall of mounting sleeve and connecting cover, the other end of shaft pipe is riveted with the cover, the damping structure is arranged between the cover and the back surface of mounting disc, the damping structure is used to provide stable damping force when swing arm swings, and the service life is prolonged through elastic compensation after the wear of damping element.

[0006] Further, the damping structure includes an annular limiting groove provided on the back surface of the mounting disc, and a butterfly spring, an annular pad and a damping ring are sequentially arranged in the annular limiting groove from the side close to the back surface of the mounting disc.

[0007] Further, the inner hole wall edge of the butterfly spring is provided with annularly distributed U-shaped elastic grooves. Further, the inner hole wall of the damping ring is provided with symmetrical positioning blocks, the inner ring wall of the annular limiting groove is provided with clamping grooves matched with the positioning blocks, and the positioning blocks are clamped into the clamping grooves to prevent the damping ring from rotating circumferentially.

[0008] Further, the annular pad is made of elastic material.

[0009] Further, the damping ring has an annular abutting ring protruding from the middle hole, and the annular pad is sleeved on the annular abutting ring.

[0010] Further, the damping ring is in frictional contact with the cover under the elastic action of the butterfly spring and the annular pad.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] 1. High damping and stability: By arranging a special damping structure between the cover and the back surface of the mounting disc, the butterfly spring and the elastic annular pad continuously pre-tighten the damping ring, so that the damping ring is in close frictional contact with the cover. When the swing arm swings violently due to sudden changes in the working condition of a high-power engine, the damping structure can provide strong and stable resistance, effectively inhibits the excessive swing of the swing arm, ensures the smooth and efficient operation of the transmission system, and improves the overall stability of the equipment.

[0013] 2. High durability and long service life: the damping structure of the utility model has ingenious design, and has automatic wear compensation function. When the damping ring appears wear and thickness reduction due to long-term friction, the linear compression characteristics of the multi-layer arch structure of the butterfly spring and the elastic deformation capacity of the elastic ring pad can jointly provide additional elastic compensation amount, continuously push the damping ring to compress to the cover direction, so as to maintain constant friction damping force. This characteristic greatly delays the performance degradation caused by wear, significantly prolongs the service life of the damping ring and even the whole tensioning wheel, and reduces the maintenance frequency and cost.

[0014] 3. Reliable structure and convenient assembly: the damping ring is fixed in the circumferential direction through the cooperation of the positioning block and the clamping groove, which prevents rotation in work, and guarantees the uniformity and stability of the damping force. The riveting mode between various components such as the connecting cover, the shaft tube and the cover, and the cooperation of the torsion spring and the gasket make the overall structure compact, the connection firm, the assembly process simple and reliable, and the utility model is suitable for harsh engineering equipment environment.

[0015] The utility model will be further described below in combination with the drawings and specific embodiments. DRAWINGS

[0016] Figure 1 It is the perspective view of the specific embodiment of the utility model;

[0017] Figure 2 It is the sectional view of the specific embodiment of the utility model;

[0018] Figure 3 It is the perspective view of the swing arm and the pulley in the specific embodiment of the utility model;

[0019] Figure 4 It is the perspective view of the damping ring in the specific embodiment of the utility model;

[0020] Figure 5 It is the perspective view of the butterfly spring in the specific embodiment of the utility model.

[0021] Mark explanation: 1-connecting cover; 2-swing arm; 3-pulley; 4-mounting disc; 41-middle hole; 42-mounting sleeve; 5-shaft tube; 6-gasket; 7-torsion spring; 8-cover; 9-damping structure; 91-annular limiting groove; 911-clamping groove; 92-butterfly spring; 921-U-shaped elastic groove; 93-annular pad; 94-damping ring; 941-positioning block; 942-annular abutting ring. EMBODIMENT

[0022] The utility model will be further described below in combination with the drawings and specific embodiments, which is only used for further illustrating the utility model, and cannot be understood as limiting the protection scope of the utility model.

[0023] AsFigure 1 Figure 5 As shown in the drawings, the embodiment discloses a high-damping stability and high-durability belt tensioning wheel, which is characterized by an innovative damping structure design to cope with the severe working conditions caused by high-power engines.

[0024] The tensioning wheel mainly comprises a connecting cover 1, a swing arm 2 and a pulley 3. The pulley 3 is installed at one end of the swing arm 2 through a bearing and is used to engage with the engine belt. The other end of the swing arm 2 is a key installation and damping part, which is provided with a mounting disc 4. The middle part of the mounting disc 4 is processed with a middle hole 41, and the front surface is integrally formed with a cylindrical mounting sleeve 42 protruding along the axis of the middle hole 41. Inside the mounting sleeve 42, a freely rotating shaft tube 5 is inserted.

[0025] A through hole is formed in the center of the connecting cover 1, which is fixedly connected with one end (the right end in the drawing) of the shaft tube 5 by cold riveting. The connecting cover 1 is in the shape of a cap, and its open end cover is arranged and fixed on the front surface of the mounting disc 4. In order to prevent dust from entering and ensure the accuracy of axial positioning, a gasket 6 is arranged between the open end of the connecting cover 1 and the front surface of the mounting disc 4.

[0026] In addition, one or more torsion springs 7 are arranged between the outer wall of the mounting sleeve 42 and the inner wall of the connecting cover 1, and the two ends of the torsion spring 7 are respectively abutted on the mounting sleeve 42 and the connecting cover 1, so as to provide a continuous tensioning force for the pulley 3.

[0027] The other end (the left end in the drawing) of the shaft tube 5 is also fixed with a cover 8 by riveting. Between the cover 8 and the back surface of the mounting disc 4 is the core of high damping and high durability-damping structure 9. The specific structure of the damping structure 9 is shown in the drawing, which is integrated in a ring-shaped limiting groove 91 opened on the back surface of the mounting disc 4. Figure 3

[0028] From the side close to the back surface of the mounting disc 4, the ring-shaped limiting groove 91 is sequentially placed with a butterfly spring 92, a ring-shaped gasket 93 and a damping ring 94. Among them, the butterfly spring 92 is a spring with multiple concentric ring-shaped conical discs, and the inner hole wall edge is processed with a ring-shaped U-shaped elastic groove 921 uniformly distributed, which enhances the overall elastic deformation capacity and buffering effect.

[0029] ​​The damping ring 94 is preferably made of wear-resistant high polymer composite material or metal matrix composite material, and two symmetrical positioning blocks 941 are formed on the inner hole wall of the damping ring 94. Correspondingly, the inner ring wall of the annular limiting groove 91 is provided with clamping grooves 911 matched with the two positioning blocks 941. By clamping the positioning blocks 941 into the clamping grooves 911, the damping ring 94 is stably positioned in the groove in the axial direction, effectively preventing the damping ring 94 from rotating in the circumferential direction in the working state. The annular pad 93 is made of elastic material such as rubber and polyurethane. The middle hole of the damping ring 94 is protruded to form an annular abutting ring 942, and the annular pad 93 is sleeved on the annular abutting ring 942, so that the position of the annular pad 93 is stable, and the annular pad 93 can move synchronously with the damping ring 94. In the working state, the butterfly spring 92 is compressed between the bottom of the annular limiting groove 91 and the annular pad 93, and an elastic pre-tightening force is applied to the annular pad 93 and the damping ring 94. Under the action of the pre-tightening force, the outer cylindrical surface of the damping ring 94 is in close frictional contact with the inner side surface of the cover 8.

[0030] When the high-power engine suddenly accelerates or decelerates, causing the belt tension to change dramatically and driving the swing arm 2 to swing the mounting disc 4 and the cover 8 relative to the damping ring 94, the frictional force between the damping ring 94 and the cover 8 will provide a strong resistance torque, i.e. high damping force, thereby rapidly suppressing the swing amplitude of the swing arm 2 and ensuring smooth transmission. More importantly, during long-term operation, the outer surface of the damping ring 94 will gradually wear and thin due to continuous friction with the cover 8. At this time, due to the large elastic stroke of the butterfly spring 92 and the linear compression characteristics brought by the multi-arch structure, as well as the elasticity of the annular pad 93, the two will further elastically deform and release the stored elastic potential energy, pushing the damping ring 94 to further move towards the cover 8, automatically compensating for the gap loss caused by wear, so that the pressure between the damping ring 94 and the cover 8 remains basically unchanged, thereby maintaining a constant damping effect. This self-compensation mechanism is the key to realizing high durability of the utility model, greatly prolonging the service life of the tensioning wheel and reducing maintenance costs.

[0031] The above only describes the preferred embodiments of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high-damping stability high-durability belt tensioning wheel comprising a connecting cover (1), a swing arm (2) and a pulley (3), the pulley (3) being installed at one end of the swing arm (2), characterized in that, Another end of the swing arm (2) is provided with a mounting disc (4), the middle part of the mounting disc (4) is provided with a middle hole (41), the front surface of the mounting disc (4) is provided with a mounting sleeve (42) protruding along the middle hole (41); a rotatable shaft tube (5) is inserted into the mounting sleeve (42), the middle hole of the connecting cover (1) is riveted with one end of the shaft tube (5), the connecting cover (1) is arranged on the front surface of the mounting disc (4), and a gasket (6) is arranged between the opening end of the connecting cover (1) and the front surface of the mounting disc (4), a torsion spring (7) is arranged between the mounting sleeve (42) and the inner wall of the connecting cover (1); the other end of the shaft tube (5) is riveted with a cover (8), a damping structure (9) is arranged between the cover (8) and the back surface of the mounting disc (4), the damping structure (9) is used for providing stable damping force when the swing arm (2) swings, and the service life is prolonged through elastic compensation after the damping element wears out.

2. The high-damping stability high-durability belt tension pulley according to claim 1, characterized by, The damping structure (9) comprises an annular limiting groove (91) arranged on the back surface of the mounting disc (4), and a butterfly spring (92), an annular pad (93) and a damping ring (94) are sequentially arranged in the annular limiting groove (91) from the side close to the back surface of the mounting disc (4).

3. The high-damping stability high-durability belt tension pulley according to claim 2, characterized by, An annular uniform U-shaped elastic groove (921) is arranged on the edge of the inner hole wall of the butterfly spring (92).

4. The high-damping stability high-durability belt tension pulley according to claim 2, characterized by, Symmetrical positioning blocks (941) are arranged on the inner hole wall of the damping ring (94), and clamping grooves (911) matched with the positioning blocks (941) are arranged on the inner ring wall of the annular limiting groove (91), the positioning blocks (941) are clamped into the clamping grooves (911) to prevent the damping ring (94) from rotating circumferentially.

5. The high-damping stability high-durability belt tension pulley according to claim 2, characterized by, The annular pad (93) is made of elastic material.

6. The high-damping stability high-durability belt tension pulley according to claim 2, characterized by, The middle hole of the damping ring (94) protrudes an annular abutting ring (942), and the annular pad (93) is sleeved on the annular abutting ring (942).

7. The high-damping stability high-durability belt tension pulley according to claim 2, characterized by The damping ring (94) is in frictional contact with the cover (8) under the elastic action of the butterfly spring (92) and the annular pad (93).

Images