Novel sealing structure for driving shaft assembly

Abstract

The utility model provides a novel sealing structure for a driving shaft assembly, which relates to the technical field of automobiles and comprises a ball cage, a driving shaft body is arranged on the outer surface of the ball cage in a matched manner, a second sealing lip is mounted at the position, close to the right side, of the outer surface of the driving shaft body, and an elastic supporting element is sleeved on the outer surface of the second sealing lip. According to the novel sealing structure design, the first sealing lip and the second sealing lip are tightly attached to the driving shaft body, the first sealing ring and the second sealing ring have the reinforcing function, the sealing effect is remarkably improved, the novel sealing structure design is particularly suitable for complex working conditions such as turning, and meanwhile the sealing effect is improved. Through the design of the mounting hole, the threaded hole and the second bolt, the whole structure is high in compactness and easy to mount and dismount, the durability of the structure is effectively protected, external impurities are prevented from entering the structure, and the sealing effect is enhanced through the whole design.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a novel sealing structure for a drive shaft assembly. Background Technique

[0002] The drive shaft assembly is an important component in the transmission systems of equipment such as automobiles and construction machinery. It usually consists of a drive shaft, universal joints, spline shafts, intermediate supports, etc. The main function of the drive shaft is to transmit power from the transmission or differential to the wheels, enabling the vehicle to move.

[0003] In the prior art, traditional sealing structures for drive shaft assemblies mostly use rubber sealing rings as the main sealing elements. Such sealing rings can provide good sealing effects under ideal working conditions, preventing the leakage of lubricating oil or grease and ensuring the normal operation of the drive system. However, in actual use, especially under complex working conditions where the vehicle turns frequently, the friction between the sealing ring and the drive shaft and steering knuckle increases significantly, resulting in a gradual reduction in the sealing effect. Therefore, in response to the above problems, we propose a novel sealing structure for a drive shaft assembly. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that in actual use, especially under complex working conditions where the vehicle turns frequently, the friction between the sealing ring and the drive shaft and steering knuckle increases significantly, resulting in a gradual reduction in the sealing effect in the prior art, and to propose a novel sealing structure for a drive shaft assembly.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A novel sealing structure for a drive shaft assembly, including a ball cage, a drive shaft body is arranged on the outer surface of the ball cage in a matching manner, a second sealing lip is installed on the outer surface of the drive shaft body near the right side, an elastic support element is sleeved on the outer surface of the second sealing lip, a first sealing lip is sleeved on the outer surface of the elastic support element, a first sealing ring is installed on the left surface of the first sealing lip, and a second sealing ring is installed on the right surface of the first sealing lip.

[0006] Preferably, four second bolts are equidistantly installed on the left surface of the first sealing ring, and four mounting holes are equidistantly opened on the outer surface of the second sealing ring.

[0007] Preferably, a first dust cover is sleeved on the rear surfaces of the first sealing ring and the second sealing ring, and two first bolts are installed on the outer surface of the first dust cover.

[0008] Preferably, a second dust cover is sleeved on the front surfaces of the first sealing ring and the second sealing ring, and the outer surface of the first bolt penetrates through the outer surface of the second dust cover.

[0009] Preferably, a nut is threadedly connected to the end of the first bolt.

[0010] Preferably, four threaded holes are equidistantly formed in the inner walls of the first dust cover and the second dust cover near the right side.

[0011] Preferably, the outer surfaces of the four second bolts slidably penetrate through the inner walls of the four mounting holes, and the ends of the second bolts are threadedly connected to the inner walls of the threaded holes.

[0012] Preferably, a plurality of reinforcing ribs are provided between the inner walls of the first dust cover and the second dust cover.

[0013] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0014] 1. In the present utility model, the novel sealing structure design significantly improves the sealing effect through the close fit of the first sealing lip and the second sealing lip with the driving shaft body, as well as the strengthening effect of the first sealing ring and the second sealing ring. It is particularly suitable for complex working conditions such as turning. At the same time, the design of its mounting holes, threaded holes and second bolts makes the overall structure highly compact, easy to install and disassemble, effectively protects the durability of the structure and prevents foreign impurities from entering, and the entire design enhances the sealing effect.

[0015] 2. In the present utility model, the plurality of reinforcing ribs play a certain protective role during the pulling process of the first dust cover and the second dust cover during turning, and prevent the first dust cover and the second dust cover from deforming too severely. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of a novel sealing structure for a drive shaft assembly proposed by the present utility model;

[0017] Figure 2 is a partial structure perspective view of a novel sealing structure for a drive shaft assembly proposed by the present utility model;

[0018] Figure 3 is a partial structure unfolded view of a novel sealing structure for a drive shaft assembly proposed by the present utility model;

[0019] Figure 4 is a partial structure cross-sectional view of a novel sealing structure for a drive shaft assembly proposed by the present utility model;

[0020] Figure 5 is another partial structure unfolded view of a novel sealing structure for a drive shaft assembly proposed by the present utility model.

[0021] Legend: 1. Constant velocity joint; 11. Drive shaft body; 2. First dust cover; 21. Second dust cover; 22. First bolt; 23. Nut; 24. Reinforcing rib; 25. Threaded hole; 3. First sealing ring; 31. Second sealing ring; 32. Second bolt; 33. Mounting hole; 4. First sealing lip; 41. Second sealing lip; 5. Elastic support element. Detailed implementation mode

[0022] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0023] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.

[0024] Embodiment 1: As Figures 1 - 5 shown, the present invention provides a novel sealing structure for a drive shaft assembly, including a constant velocity joint 1. A drive shaft body 11 is provided on the outer surface of the constant velocity joint 1. A second sealing lip 41 is installed at a position near the right side of the outer surface of the drive shaft body 11. An elastic support element 5 is sleeved on the outer surface of the second sealing lip 41. A first sealing lip 4 is sleeved on the outer surface of the elastic support element 5. A first sealing ring 3 is installed on the left surface of the first sealing lip 4. A second sealing ring 31 is installed on the right surface of the first sealing lip 4. Four second bolts 32 are equidistantly installed on the left surface of the first sealing ring 3. Four mounting holes 33 are equidistantly opened on the outer surface of the second sealing ring 31. A first dust cover 2 is sleeved on the rear surfaces of the first sealing ring 3 and the second sealing ring 31. Two first bolts 22 are installed on the outer surface of the first dust cover 2. A second dust cover 21 is sleeved on the front surfaces of the first sealing ring 3 and the second sealing ring 31. The outer surface of the first bolt 22 penetrates through the outer surface of the second dust cover 21. The end of the first bolt 22 is threadedly connected with a nut 23. Four threaded holes 25 are equidistantly opened on the inner wall near the right side of the inner walls of the first dust cover 2 and the second dust cover 21. The outer surfaces of the four second bolts 32 slidably penetrate through the inner walls of the four mounting holes 33, and the ends of the second bolts 32 are threadedly connected with the inner walls of the threaded holes 25.

[0025] The effect achieved by the entire Embodiment 1 is that when using this new sealing structure, when the driving shaft body rotates, the second sealing lip 41 will closely adhere to the surface of the driving shaft body 11 under the action of the elastic support element 5, forming the first sealing line of defense. It will closely adhere to the surface of the elastic support element 5. The elastic support element 5 uses a high-strength stainless steel spring, which can provide continuous pressure to ensure that the first sealing lip 4 and the second sealing lip 41 always maintain close contact with the driving shaft body 11, regardless of temperature changes and axial displacement of the driving shaft body 11. Therefore, when the driving shaft body 11 rotates, the first sealing lip 4 and the second sealing lip 41 will continuously adjust their positions and contact pressures. Since both the first sealing lip 4 and the second sealing lip 41 are made of high-strength and wear-resistant rubber materials, and their shapes closely fit the contour of the driving shaft body 11, they can effectively prevent the leakage of lubricating oil and the intrusion of external impurities, and effectively fill the possible tiny gaps between the first sealing ring 3 and the second sealing ring 31. The first sealing ring 3 and the second sealing ring 31 are made of soft and highly elastic nitrile rubber, which can further enhance the sealing effect. Especially when the driving shaft body 11 rotates at high speed, it can adapt to the tiny vibrations and eccentric movements of the driving shaft body 11. At the same time, the first dust cover 2 and the second dust cover 21 are made of wear-resistant and aging-resistant nylon materials, which can effectively block large external particles of impurities, reducing the wear and damage to this new sealing structure. When the vehicle turns, the first sealing lip 4 and the second sealing lip 41 will closely adhere to the outer surface of the driving shaft body 11 under the action of the elastic support element 5. Due to the characteristics of the material, it can be applied to situations such as turning. Then, under the action of the first sealing ring 3 and the second sealing ring 31, the sealing effect on the driving shaft body 11 is strengthened. The second bolt 32 on the first sealing ring 3 can adjust the tightness with the second sealing ring 31, and the cooperation of the mounting hole 33, the threaded hole 25 and the second bolt 32 can make the tightness and sealing performance between the first sealing ring 3, the second sealing ring 31, the first dust cover 2 and the second dust cover 21. Finally, the whole is protected by the first dust cover 2 and the second dust cover 21 to protect the durability of the entire structure, prevent external impurities from entering, and is installed through the first bolt 22 and the nut 23, which is convenient for later disassembly and replacement. The whole design enhances the sealing effect.

[0026] Embodiment 2: As Figures 1 - 5 shown, a plurality of reinforcing ribs 24 are provided between the inner walls of the first dust cover 2 and the second dust cover 21.

[0027] The effect achieved by the entire Embodiment 2 is that the plurality of reinforcing ribs 24 play a certain protective role during the pulling process of the first dust cover 2 and the second dust cover 21 when turning, and will not cause the first dust cover 2 and the second dust cover 21 to deform too severely.

[0028] Working principle: When using this new sealing structure, when the driving shaft body rotates, the first sealing lip 4 and the second sealing lip 41 will closely fit with the outer surface of the driving shaft body 11 under the action of the elastic support element 5. Due to the material characteristics, it can be applied to complex situations such as turning. Then, under the action of the first sealing ring 3 and the second sealing ring 31, the sealing effect on the driving shaft body 11 is enhanced. The second bolt 32 on the first sealing ring 3 can adjust the tightness with the second sealing ring 31, and the cooperation of the mounting hole 33, the threaded hole 25 and the second bolt 32 can make the tightness and sealing performance between the first sealing ring 3, the second sealing ring 31, the first dust cover 2 and the second dust cover 21. Finally, the whole is protected by the first dust cover 2 and the second dust cover 21 to protect the durability of the whole structure, prevent foreign impurities from entering, and is installed through the first bolt 22 and the nut 23, which is convenient for later disassembly and replacement. The whole design enhances the sealing effect. Moreover, multiple reinforcing ribs 24 play a certain protective role when the first dust cover 2 and the second dust cover 21 are pulled during turning, and will not cause the first dust cover 2 and the second dust cover 21 to deform too severely.

[0029] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A new sealing structure for a drive shaft assembly, comprising a ball cage (1), characterized in that: The outer surface of the ball cage (1) is matched with a drive shaft body (11), a second sealing lip (41) is installed on the outer surface of the drive shaft body (11) near the right side, the outer surface of the second sealing lip (41) is sleeved with an elastic support element (5), the outer surface of the elastic support element (5) is sleeved with a first sealing lip (4), the left surface of the first sealing lip (4) is installed with a first sealing ring (3), and the right surface of the first sealing lip (4) is installed with a second sealing ring (31).

2. The new sealing structure for the drive shaft assembly according to claim 1 is characterized in that: Four second bolts (32) are equidistantly mounted on the left surface of the first sealing ring (3), and four mounting holes (33) are equidistantly opened on the outer surface of the second sealing ring (31).

3. The new sealing structure for the drive shaft assembly according to claim 2 is characterized in that: A first dust cover (2) is sleeved on the rear surfaces of the first sealing ring (3) and the second sealing ring (31), and two first bolts (22) are installed on the outer surface of the first dust cover (2).

4. The new sealing structure for the drive shaft assembly according to claim 3 is characterized in that: A second dust cover (21) is sleeved on the front surfaces of the first sealing ring (3) and the second sealing ring (31), and the outer surface of the first bolt (22) penetrates the outer surface of the second dust cover (21).

5. The new sealing structure for the drive shaft assembly according to claim 4 is characterized in that: The end of the first bolt (22) is threadedly connected with a nut (23).

6. The novel sealing structure for the drive shaft assembly according to claim 5 is characterized in that: Four threaded holes (25) are equidistantly formed on the inner surface walls of the first dust cover (2) and the second dust cover (21) near the right side.

7. The novel sealing structure for the drive shaft assembly according to claim 6 is characterized in that: The outer surfaces of the four second bolts (32) slide through the inner walls of the four mounting holes (33), and the ends of the second bolts (32) are threadedly connected to the inner walls of the threaded holes (25).

8. The novel sealing structure for the drive shaft assembly according to claim 7 is characterized in that: A plurality of reinforcing ribs (24) are provided between the inner surface walls of the first dust cover (2) and the second dust cover (21).

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