Sealing ring for automobile limit variable speed belt pulley bearing

Abstract

The utility model discloses an automobile limit variable speed belt pulley bearing sealing ring, which belongs to the technical field of bearing sealing rings and comprises a belt pulley body, a bearing block arranged in an inner cavity of the belt pulley body, a rotating shaft arranged in an inner cavity of the bearing block, and a sealing lip and a sealing assembly arranged between the rotating shaft and the belt pulley body. The two ends of the belt pulley body are sealed through sealing covers. The sealing assembly is arranged, pressure is applied to the sealing ring block through the extrusion spring, it is ensured that the sealing ring block and the rotating shaft are tightly attached, the contact gap is remarkably reduced, leakage of lubricating oil is effectively prevented, and therefore the use amount of the lubricating oil and the maintenance cost are reduced, and due to the adjustable extrusion characteristic of the sealing ring block, the service life of the lubricating oil is prolonged. Therefore, the connection requirements of rotating shafts with different sizes can be met, and the use requirements of belt pulleys with different inner diameters are met.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing sealing rings, in particular to a bearing sealing ring for an automobile extreme speed change belt pulley. Background Art

[0002] Bearing seals, a type of bearing seal, have the characteristics of preventing grease fire, avoiding frequent refueling and having a simple structure, and are widely used in bearings. The existing automobile extreme speed change pulley bearing seal has a single lip contact seal, which can only adapt to uniform speed sealing and cannot meet the current automobile extreme test. The current extreme test is a sealing condition of a cycle test from the highest speed to the lowest speed. A single seal cannot meet the condition, and the sealing force is not easy to adjust and is not easy to disassemble. For this reason, we propose an automobile extreme speed change pulley bearing seal.

[0003] A Chinese patent discloses a sealing ring for an automobile extreme speed change pulley bearing (publication number CN207921133U). The patent can enhance the sealing performance between the sealing ring and the inner ring of the bearing by providing a first sealing lip and a second sealing lip. The support rod and the support plate can be used to squeeze the first sealing lip and the second sealing lip outward in the support groove, so that the first sealing lip and the second sealing lip are pressed against the inner ring of the bearing, and the pressing force can be adjusted by a magnet and an electromagnet, thereby adjusting the sealing degree. However, the patent can only seal the bearing when in use. When in use, the sealing effect cannot be adjusted according to the different inner diameters of the pulley, thereby reducing the scope of use of the device. Utility Model Content

[0004] The utility model aims to provide a sealing ring for a bearing of an automobile extreme speed change pulley to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An automobile extreme speed change pulley bearing seal ring comprises a pulley body, a bearing block is arranged in the inner cavity of the pulley body, a rotating shaft is arranged in the inner cavity of the bearing block, a sealing lip and a sealing assembly are arranged between the rotating shaft and the pulley body, and both ends of the pulley body are sealed by sealing covers;

[0007] The sealing assembly comprises a rotating block, the inner cavity of which is provided with a sealing ring block, and the sealing ring block and the rotating block are extruded and sealed with the rotating shaft via a supporting extrusion element.

[0008] As a further solution of the utility model, the supporting extrusion element includes an extrusion block, a first rotating rod is rotatably sleeved in the inner cavity of one end of the extrusion block, both ends of the first rotating rod are rotatably sleeved on the inner wall of the rotating block, and the other end of the extrusion block realizes extrusion of the sealing ring block through a pressure block and an extrusion spring.

[0009] As a further solution of the utility model, one end of the pressure block is fixedly connected to one end of the extrusion spring, the other end of the pressure block is in contact with the top of the sealing ring block, and the end of the extrusion spring away from the pressure block is fixedly connected to the inner wall of the rotating block.

[0010] As a further solution of the utility model, the sealing cover and the pulley body are fixedly connected by a first bolt, and the inner wall of the sealing cover is fixedly connected to one side of the sealing lip.

[0011] As a further solution of the utility model, both ends of the rotating shaft are provided with limit blocks, and the limit blocks are threadedly rotatably sleeved on the outer periphery of the rotating shaft.

[0012] As a further solution of the utility model, both ends of the pulley body are provided with a first rotation groove, and the rotation block is rotatably sleeved in the inner cavity of the first rotation groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] When the utility model is used, by setting a sealing assembly and applying pressure to the sealing ring block through an extrusion spring, the sealing ring block is ensured to fit tightly with the rotating shaft, the contact gap is significantly reduced, and the leakage of lubricating oil is effectively prevented, thereby reducing the use amount of lubricating oil and the maintenance cost. Due to the adjustable extrusion characteristics of the sealing ring block, it can adapt to the connection requirements of rotating shafts of different sizes, thereby adapting to the use requirements of pulleys with different inner diameters. By setting a sealing cover, it can effectively prevent lubricating oil leakage and contaminant invasion, reduce the maintenance and replacement frequency of the bearing, and improve the service life and use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the overall structure of a sealing ring for a bearing of an automobile extreme speed change pulley.

[0016] Figure 2 The diagram is a diagram of the internal structure of a pulley body in a seal ring of a maximum speed shift pulley bearing of an automobile.

[0017] Figure 3 The present invention is a structural diagram of the sealing cover part of a bearing sealing ring of an automobile extreme speed change pulley.

[0018] Figure 4This is a disassembled diagram of the sealing component in the bearing seal ring of an automobile extreme speed change pulley.

[0019] Figure 5 The diagram is a structural diagram of a supporting extrusion element in a seal ring of a bearing of an automobile extreme speed change pulley.

[0020] In the figure: 1. pulley body; 2. rotating shaft; 3. sealing cover; 4. limit block; 5. first bolt; 6. bearing block; 7. first rotating groove; 8. sealing lip; 9. rotating block; 10. sealing ring block; 11. first groove; 12. extrusion block; 13. second groove; 14. first rotating rod; 15. pressure block; 16. extrusion spring. DETAILED DESCRIPTION

[0021] 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.

[0022] Example 1: Please refer to Figure 1 - Figure 5 In the embodiment of the utility model, a bearing seal ring of an automobile extreme speed change pulley comprises a pulley body 1, an inner cavity of the pulley body 1 is provided with a bearing block 6, the bearing block 6 is arranged in the inner cavity of the pulley body 1, and the outer periphery of the pulley body 1 is sealed to achieve sealing of the bearing block 6 to prevent leakage of lubricating oil, a rotating shaft 2 is arranged in the inner cavity of the bearing block 6, a sealing lip 8 and a sealing assembly are arranged between the rotating shaft 2 and the pulley body 1, and both ends of the pulley body 1 are sealed by a sealing cover 3;

[0023] The sealing assembly includes a rotating block 9, and a sealing ring block 10 is provided in the inner cavity of the rotating block 9. The sealing ring block 10 and the rotating block 9 are extruded and sealed with the rotating shaft 2 through a supporting extrusion element. Under the action of the supporting extrusion element, the sealing ring block 10 can be fitted with the rotating shaft 2. Since the sealing ring block 10 is made of rubber material, the generation of gaps can be reduced, and the inner wall of the sealing ring block 10 is provided with a plurality of concave grooves, thereby achieving a multi-layer limit sealing effect;

[0024] See also Figure 4 and Figure 5The supporting extrusion element includes an extrusion block 12. The inner cavity of one end of the extrusion block 12 is rotatably sleeved with a first rotating rod 14. The two ends of the first rotating rod 14 are rotatably sleeved on the inner wall of the rotating block 9. The other end of the extrusion block 12 is pressed against the sealing ring block 10 through a pressure block 15 and an extrusion spring 16. A second groove 13 is provided on the outer wall of the sealing ring block 10. The width of the second groove 13 is the same as the length of the extrusion block 12. When in use, the side of the extrusion block 12 fits with the side of the second groove 13 and cooperates with the extrusion spring 16, so that the extrusion block 12 can be pressed against the sealing ring block 10, so that the sealing ring block 10 can fit closely with the rotating shaft 2, thereby reducing the size of the gap and improving the sealing effect.

[0025] See also Figure 4 and Figure 5 One end of the pressure block 15 is fixedly connected to one end of the extrusion spring 16, and the other end of the pressure block 15 is in contact with the top of the sealing ring block 10. The end of the extrusion spring 16 away from the pressure block 15 is fixedly connected to the inner wall of the rotating block 9. A first groove 11 is provided on the inner wall of the rotating block 9. The width of the first groove 11 is the same as the length of the pressure block 15, and the end of the extrusion spring 16 away from the pressure block 15 is fixedly installed on the inner wall of the first groove 11.

[0026] Example 2: Please refer to Figure 1 - Figure 5 , based on Example 1, the sealing cover 3 and the pulley body 1 are fixedly connected by the first bolt 5, and the sealing cover 3 can be installed and fixed by the first bolt 5, and it is easy to disassemble. The inner wall of the sealing cover 3 is fixedly connected to one side of the sealing lip 8, and the sealing lip 8 is arranged inside the sealing cover 3, and the side of the sealing cover 3 can be sealed, thereby preventing the lubricating oil from flowing out through the gap of the sealing cover 3;

[0027] See also Figure 1 , both ends of the rotating shaft 2 are provided with limit blocks 4, the limit blocks 4 are threadedly rotatably sleeved on the periphery of the rotating shaft 2, the periphery of the rotating shaft 2 is provided with a first thread groove, the inner cavity of the limit block 4 is provided with a second thread groove, the first thread groove and the second thread groove are meshed with each other, thereby realizing the threaded connection between the rotating shaft 2 and the limit block 4;

[0028] See also Figure 1 and Figure 2 A first rotating groove 7 is provided at both ends of the pulley body 1, and a rotating block 9 is rotatably sleeved in the inner cavity of the first rotating groove 7. The sizes of the rotating block 9 and the first rotating groove 7 are adapted to each other, and the rotating block 9 can be made of rubber material during specific use, thereby reducing the gap between the first rotating groove 7 and the rotating block 9, thereby reducing the leakage of lubricating oil.

[0029] The working principle of the utility model is: when the device is needed, the sealing ring block 10 and the rotating block 9 are first assembled together, and the supporting extrusion element is installed between the rotating block 9 and the sealing ring block 10, so as to realize the extrusion sealing of the sealing ring block 10. In this process, the extrusion spring 16 plays a key role. It applies pressure to the sealing ring block 10 through the pressure block 15, so that the side wall of the sealing ring block 10 can be closely fitted with the periphery of the rotating shaft 2, thereby reducing the contact gap between the rotating shaft 2 and the sealing ring block 10, thereby preventing the leakage of lubricating oil, reducing the waste of lubricating oil, and improving the sealing effect between the rotating shaft 2 and the sealing ring block 10. When the rotating shaft 2 starts to rotate, since a tight seal has been formed between the sealing ring block 10 and the rotating shaft 2, this can effectively prevent the leakage of lubricating oil. At the same time, the rotating block 9 rotates freely in the first rotating groove 7, allowing the pulley body 1 to adjust the position or angle as needed without interfering with the sealing effect. At the same time, since the limit blocks 4 are provided at both ends of the rotating shaft 2, and the limit blocks 4 are connected to the rotating shaft 2 by threads, the rotation requirements of the pulley body 1 can be met. At the same time, the sealing cover 3 is fixed to the pulley body 1 by the first bolt 5, which not only enhances the overall stability and prevents any component from loosening, but also prevents the lubricating oil from flowing out from both ends of the pulley body 1, reducing the waste of the lubricating oil. At the same time, since the sealing lip 8 is fixedly connected to the inner wall of the sealing cover 3, not only the sealing effect can be improved, but also pollutants can be prevented from entering the interior of the bearing block 6, thereby extending the service life of the bearing block 6.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sealing ring for a bearing of an automobile extreme speed change pulley, comprising a pulley body (1), characterized in that: The inner cavity of the pulley body (1) is provided with a bearing block (6), the inner cavity of the bearing block (6) is provided with a rotating shaft (2), a sealing lip (8) and a sealing assembly are provided between the rotating shaft (2) and the pulley body (1), and both ends of the pulley body (1) are sealed by means of sealing covers (3); The sealing assembly comprises a rotating block (9), the inner cavity of the rotating block (9) is provided with a sealing ring block (10), and the sealing ring block (10) and the rotating block (9) are extruded and sealed with the rotating shaft (2) via a supporting extrusion element.

2. The automobile extreme speed change pulley bearing seal ring according to claim 1, characterized in that: The supporting extrusion element comprises an extrusion block (12), one end of the extrusion block (12) is rotatably sleeved with a first rotating rod (14) in its inner cavity, both ends of the first rotating rod (14) are rotatably sleeved on the inner wall of the rotating block (9), and the other end of the extrusion block (12) is used to extrude the sealing ring block (10) through a pressure block (15) and an extrusion spring (16).

3. The automobile extreme speed change pulley bearing seal ring according to claim 2, characterized in that: One end of the pressure block (15) is fixedly connected to one end of the extrusion spring (16), the other end of the pressure block (15) is in contact with the top of the sealing ring block (10), and the end of the extrusion spring (16) away from the pressure block (15) is fixedly connected to the inner wall of the rotating block (9).

4. The automobile extreme speed change pulley bearing seal ring according to claim 1, characterized in that: The sealing cover (3) and the pulley body (1) are fixedly connected via a first bolt (5), and the inner wall of the sealing cover (3) is fixedly connected to one side of the sealing lip (8).

5. The automobile extreme speed change pulley bearing seal ring according to claim 1, characterized in that: Limit blocks (4) are provided at both ends of the rotating shaft (2), and the limit blocks (4) are threadedly rotatably sleeved on the periphery of the rotating shaft (2).

6. The automobile extreme speed change pulley bearing seal ring according to claim 1, characterized in that: Both ends of the pulley body (1) are provided with a first rotation groove (7), and the rotation block (9) is rotatably sleeved in the inner cavity of the first rotation groove (7).

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