Constant velocity universal joint

Abstract

The utility model provides a constant velocity universal joint, and belongs to the technical field of mechanical transmission. The problem that an existing dust cover of the constant velocity universal joint is prone to damage, and consequently grease leaks is solved. The constant velocity universal joint comprises a bell-shaped shell, a retainer, a starlike sleeve and a plurality of steel balls, a shaft body is assembled in the middle of the starlike sleeve, a dust cover is arranged between the bell-shaped shell and the shaft body, the dust cover comprises an outer dust cover and an inner dust cover which are formed in an inner layer and an outer layer, the outer dust cover and the inner dust cover are both of a wave-shaped structure, and a separation cavity is formed between the inner dust cover and the outer dust cover. The two ends of the inner dust cover are provided with expanded covers integrally connected with the outer dust cover, the inner ring of the outer dust cover is provided with two arched parts, the bell housing is provided with a cavity for the two arched parts to be positioned and matched, the inner ring of the dust cover is provided with an arched ring, and the shaft body is provided with a groove for the arched ring to be positioned and matched. The utility model has the advantages of preventing grease leakage, prolonging the service life and improving the stability.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical transmission technology and relates to a constant velocity universal joint. Background Technology

[0002] When a universal joint rotates, a dust cover stores grease to prevent external dust and other debris from entering the joint. However, when vehicles operate in harsh environments, the dust cover is prone to damage, leading to grease leakage and affecting its use. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the prior art by providing a constant velocity universal joint that prevents grease leakage.

[0004] The objective of this utility model can be achieved through the following technical solution: A constant velocity universal joint, comprising a bell-shaped shell, a cage, a star-shaped sleeve, and several steel balls, characterized in that a shaft is assembled in the middle of the star-shaped sleeve, a dust cover is provided between the bell-shaped shell and the shaft, the dust cover comprises an outer dust cover and an inner dust cover formed by two layers, both of which are corrugated structures, a cavity is provided between the inner dust cover and the outer dust cover, the inner dust cover has expanded covers at both ends that are integrally connected to the outer dust cover, the inner ring of the outer dust cover has two arched portions, the bell-shaped shell has a cavity for positioning and fitting the two arched portions, the inner ring of the dust cover has an arched ring, and the shaft has a groove for positioning and fitting the arched ring.

[0005] In the aforementioned constant velocity universal joint, the dust cover is fastened to the bell-shaped shell and the shaft body at both ends by clamps.

[0006] Compared with existing technologies, this constant velocity universal joint has the advantages of preventing grease leakage, improving service life and stability. Attached Figure Description

[0007] Figure 1 This is a partial cross-sectional view of a constant velocity universal joint.

[0008] In the diagram, 1. Bell-shaped shell; 2. Cage; 3. Star-shaped sleeve; 4. Steel ball; 5. Shaft; 6. Outer dust cover; 7. Inner dust cover; 8. Chamber; 9. Expanded cover; 10. Arched part; 11. Arched ring; 12. Clamp. Detailed Implementation

[0009] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0010] like Figure 1As shown, this constant velocity universal joint includes a bell-shaped shell 1, a retainer 2, a star-shaped sleeve 3, and several steel balls 4. Its key feature is that a shaft 5 is assembled in the middle of the star-shaped sleeve 3. A dust cover is provided between the bell-shaped shell 1 and the shaft 5. The steel balls 4 are surrounded by grease, which is preserved by the dust cover to prevent leakage. The dust cover includes an outer dust cover 6 and an inner dust cover 7, both formed in two layers. Both the outer dust cover 6 and the inner dust cover 7 have a corrugated structure. A cavity 8 exists between the inner dust cover 7 and the outer dust cover 6. The inner dust cover 7 has expanded covers 9 at both ends that are integrally connected to the outer dust cover 6. The inner ring of the outer dust cover 6 has two arched portions 10. The bell-shaped shell 1 has a recess for positioning and fitting the two arched portions 10. The inner ring of the dust cover has an arched ring 11. The shaft 5 has a groove for positioning and fitting the arched ring 11, further stabilizing the installation of the dust cover, improving installation stability, and preventing the dust cover from shifting or dislodging.

[0011] The inner and outer dust covers 6, which are set up with a partition, prevent grease leakage in the event that the outer dust cover 6 is damaged.

[0012] The dust cover is fastened to the bell-shaped shell 1 and the shaft 5 at both ends by clamps 12 respectively. After the arched part 10 and the arched ring 11 are installed in place, the dust cover is fixed to the bell-shaped shell 1 and the shaft 5 using the existing clamps 12. The two ends are fixed, which is stable and reliable.

[0013] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0014] Although this document frequently uses terms such as bell-shaped shell 1, cage 2, star-shaped sleeve 3, steel ball 4, shaft 5, outer dust cover 6, inner dust cover 7, cavity 8, expanded cover 9, arched part 10, arched ring 11, and clamp 12, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A constant velocity universal joint, comprising a bell-shaped shell (1), a cage (2), a star-shaped sleeve (3), and a plurality of steel balls (4), characterized in that, The star-shaped sleeve (3) is fitted with a shaft (5) in the middle. A dust cover is provided between the bell-shaped shell (1) and the shaft (5). The dust cover includes an outer dust cover (6) and an inner dust cover (7) formed by two layers. Both the outer dust cover (6) and the inner dust cover (7) are wave-shaped structures. There is a cavity (8) between the inner dust cover (7) and the outer dust cover (6). The inner dust cover (7) has an expanded cover (9) at both ends that is integrally connected with the outer dust cover (6). The inner ring of the outer dust cover (6) has two arched parts (10). The bell-shaped shell (1) has a cavity for positioning and fitting the two arched parts (10). The inner ring of the dust cover has an arched ring (11). The shaft (5) has a groove for positioning and fitting the arched ring (11).

2. A constant velocity universal joint according to claim 1, characterized in that, The dust cover is fastened to the bell-shaped shell (1) and the shaft (5) at both ends by clamps (12).

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