Maintenance-free universal joint for all-terrain vehicle

Abstract

The maintenance-free universal joint for the all-terrain vehicle comprises a cross shaft and an outer ring rotationally arranged at the end of the cross shaft in a sleeving mode, an oil seal is arranged on the edge side of an opening of the outer ring, and a plurality of lip structures are arranged on the side portion of the oil seal so that the lip structures can be attached to the edge side of the cross shaft. The dustproof effect of the universal joint is improved.

Description

Technical Field

[0001] This utility model relates to the field of universal joints, and in particular to a maintenance-free universal joint for all-terrain vehicles. Background Technology

[0002] A universal joint, also known as a universal connector, is a mechanical component that enables variable-angle power transmission. It is used in locations where the direction of the drive shaft needs to be changed, and it is the "joint" component of the universal transmission device in a car's drive system.

[0003] As a special type of vehicle, all-terrain vehicles also require universal joints. However, since all-terrain vehicles usually travel in muddy or wilderness environments, the universal joints in all-terrain vehicles are easily invaded by mud and dust, which can affect their normal use. Utility Model Content

[0004] The purpose of this invention is to provide a maintenance-free universal joint for all-terrain vehicles that improves the dust-proof effect of the universal joint.

[0005] To solve the above-mentioned technical problems, this utility model provides a maintenance-free universal joint for all-terrain vehicles, including a cross shaft and an outer ring rotatably sleeved on the end of the cross shaft. An oil seal is provided on the side of the opening of the outer ring, and the side of the oil seal has several lip structures so that the several lip structures fit against the side of the cross shaft.

[0006] Furthermore, a dust cover is connected to the side of the opening of the outer ring, the dust cover is in close contact with the side of the cross shaft, and the dust cover is placed on the outside of the oil seal.

[0007] Furthermore, several convex needle rollers are connected between the inner side of the outer ring and the cross shaft.

[0008] Furthermore, the oil seal has a support edge on the side near the outer ring.

[0009] Furthermore, the end side of the cross shaft is provided with an arc groove along the circumference, and the arc groove matches the lip structure.

[0010] Furthermore, the oil seal is made of fluororubber.

[0011] Furthermore, the dust cover is made of nylon.

[0012] The beneficial effects of this utility model are as follows: By connecting the cross shaft between two adjacent transmission shafts and fixing it to the transmission shaft through the outer ring, the transmission axis between the two adjacent transmission shafts can be changed through the cross shaft. At this time, the connection between the cross shaft and the outer ring is sealed with an oil seal structure to prevent dust and mud from entering the inner side of the outer ring. Furthermore, since this solution also has several lip structures on the side of the oil seal, these lip structures form several layers of protective barriers on the side of the oil seal, thereby greatly improving the dustproof effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the connection between the outer ring and the cross shaft in this utility model.

[0015] Figure 3 This is a utility model Figure 2 A magnified view of a portion of point A in the middle.

[0016] Reference numerals in the attached diagram: 1. Cross shaft; 2. Outer ring; 3. Oil seal; 4. Lip structure; 5. Dust cover; 6. Convex needle roller; 7. Support edge; 8. Arc groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0018] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0019] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0020] like Figures 1-3The present invention provides a maintenance-free universal joint for all-terrain vehicles, including a cross shaft 1 and an outer ring 2 rotatably sleeved on the end of the cross shaft 1. An oil seal 3 is provided on the side of the opening of the outer ring 2, and the side of the oil seal 3 has a plurality of lip structures 4 so that the plurality of lip structures 4 fit against the side of the cross shaft 1.

[0021] The cross shaft is connected between two adjacent drive shafts and fixed to the drive shaft by the outer ring, allowing the drive axis to be changed between the two adjacent drive shafts through the cross shaft. At this time, the connection between the cross shaft and the outer ring is sealed with an oil seal structure to prevent dust and mud from entering the inner side of the outer ring. Furthermore, since this solution also has several lip structures on the side of the oil seal, these lip structures form several layers of protective barriers on the side of the oil seal, thereby greatly improving the dustproof effect.

[0022] In a preferred embodiment of this solution, the oil seal 3 is made of fluororubber. Due to the complex conditions of all-terrain vehicles, the temperature at the universal joint is prone to rise. Therefore, compared with the working temperature of ordinary rubber at around 100 degrees Celsius, fluororubber can reach 200 degrees Celsius to ensure the high-temperature resistance of the oil seal.

[0023] Preferably, a dust cover 5 is connected to the side of the opening of the outer ring 2, the dust cover 5 is in close contact with the side of the cross shaft 1, and the dust cover 5 covers the outside of the oil seal 3.

[0024] Specifically, the dust cover provides an initial seal between the outer ring and the cross shaft to prevent dust from entering the inner side of the outer ring. This is further enhanced by using an oil seal for a secondary seal, which greatly reduces the risk of dust ingress.

[0025] In a preferred embodiment of this solution, the dust cover 5 is made of nylon to ensure that the dust cover has a certain deformation capability.

[0026] Preferably, a number of convex needle rollers 6 are connected between the inner side of the outer ring 2 and the cross shaft 1.

[0027] Specifically, due to the complex operating conditions of all-terrain vehicles, they are more prone to encountering significantly uneven road conditions than ordinary passenger vehicles. Under operating conditions where the drive shaft swings at a large angle, convex needle rollers are less likely to seize up compared to ordinary needle rollers, thus improving the safety of universal joint operation.

[0028] Preferably, the oil seal 3 has a support edge 7 on the side near the outer ring 2.

[0029] Specifically, by increasing the contact area between the oil seal and the outer ring opening through the support edge, the connection stability between the oil seal and the outer ring is improved, thereby ensuring the sealing effect.

[0030] Preferably, the end side of the cross shaft 1 is provided with an arc groove 8 along the circumferential direction, and the arc groove 8 matches the lip structure 4.

[0031] Specifically, since the cross shaft and the outer ring are connected by a movable joint, the oil seal will rotate relative to the cross shaft to a certain extent. At this time, the arc groove can be used to ensure the connection and fit between the lip structure and the outer side of the cross shaft, thereby ensuring the stability of the seal.

[0032] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A maintenance-free universal joint for an all-terrain vehicle, characterized by: The cross shaft (1), the outer ring (2) rotatably sleeved on the end of the cross shaft (1), the oil seal (3) arranged on the side of the opening of the outer ring (2), and the lip structure (4) arranged on the side of the oil seal (3) to make the lip structure (4) adhere to the side of the cross shaft (1).

2. The maintenance-free univex for an all-terrain vehicle according to claim 1, characterized in that: The dust cover (5) is connected to the side of the opening of the outer ring (2), and the dust cover (5) and the side of the cross shaft (1) adhere to each other, and the dust cover (5) covers the outer side of the oil seal (3).

3. The maintenance-free univex for an all-terrain vehicle according to claim 1, characterized in that: The convexity needle (6) is connected between the inner side of the outer ring (2) and the cross shaft (1).

4. The maintenance-free univex of an all-terrain vehicle according to claim 1, characterized in that: The side of the oil seal (3) close to the outer ring (2) has the supporting edge (7).

5. The maintenance-free univex of an all-terrain vehicle as defined in claim 1 wherein: The end side of the cross shaft (1) is provided with the arc groove (8) along the circumference, and the arc groove (8) is matched with the lip structure (4).

6. The maintenance-free univex of an all-terrain vehicle as defined in claim 1 wherein: The oil seal (3) is made of fluorine rubber.

7. The maintenance-free univex of an all-terrain vehicle as defined in claim 2, characterized by: The dust cover (5) is made of nylon.

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