Dustproof cover for universal joint at outer end of constant-speed driving shaft

Abstract

The utility model discloses a dust cover for a universal joint at the outer end of a constant-speed driving shaft, which is a hollow body made of a thermoplastic elastomer and provided with openings at two ends, the inner diameter of the opening at the large end of the dust cover is in interference fit with the excircle of the open end of a bell housing, the inner diameter of the opening at the small end of the dust cover is matched with the excircle of the connecting end of a shaft lever, and three wave crests and two wave troughs are distributed on the middle wall of the dust cover. And an inner recess of which the central axis is parallel to the central axis of the whole is also arranged on the wall close to the small-end opening. Under the condition that the self function is guaranteed, the volume of an inner envelope space is reduced, the self weight is reduced, the cost of raw materials is effectively reduced, and the development of vehicles in the direction of light weight and low cost can be met.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts and relates to a dust cover for a universal joint at the outer end of a constant velocity drive shaft. Background Technology

[0002] The existing constant velocity drive shaft outer dust cover 06 has a structure with multiple peaks 03 and multiple valleys 02, such as Figure 1 As shown, 01 is the large end opening and 04 is the small end opening, which adapts to the large-angle turning requirements of the universal joint at the wheel end and stores grease to provide continuous lubrication for the constant velocity universal joint at the outer end. Its inner envelope space has a large volume, uses more raw materials, has high raw material costs, and is heavy, which cannot meet the development direction of vehicles towards lightweight and low cost; and the large amount of grease stored also increases the cost of vehicles. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned problems in the prior art and provide a dust cover for the universal joint at the outer end of a constant velocity drive shaft. This dust cover reduces the volume of the inner envelope space and its own weight while ensuring its own function, effectively reducing the cost of raw materials and meeting the development direction of vehicles towards lightweighting and low cost.

[0004] To achieve the above objectives, the technical solution of this utility model is: a dust cover for the universal joint at the outer end of a constant velocity drive shaft, which is a hollow body with openings at both ends made of thermoplastic elastomer. The inner diameter of the large end opening is interference-fitted with the outer circle of the bell-shaped shell opening end, and the inner diameter of the small end opening is matched with the outer circle of the shaft connection end. Three peaks and two troughs are distributed on its intermediate wall, and an indentation with a central axis parallel to the overall central axis is also provided on the wall near the small end opening.

[0005] More preferably, the thermoplastic elastomer is DuPont 8341C thermoplastic elastomer, DSM thermoplastic elastomer, EB464 thermoplastic elastomer, or Jiangsu Hechuang's H45DBT thermoplastic elastomer.

[0006] The advantages of this invention compared to existing technologies are as follows: This invention employs a corrugated, troughed, and concave structural design, which not only provides a large rotation angle for the outer universal joint but also protects the outer universal joint end from impacts such as stones during service. Furthermore, it reduces the volume of the inner envelope space, lightens its own weight, and effectively reduces raw material costs, meeting the development trend of lightweight and low-cost vehicles. Since grease needs to be injected into the outer dust cover to lubricate the constant velocity universal joint, the reduction in the inner envelope volume of the outer dust cover will simultaneously reduce the amount of grease required, thereby reducing the cost of grease. Attached Figure Description

[0007] Figure 1Front view of the existing dust cover;

[0008] Figure 2 This is the main view of the assembly of the existing dust cover and the universal joint at the outer end of the constant velocity drive shaft;

[0009] Figure 3 This is a front view of the dust cover of this utility model;

[0010] Figure 4 This is the main view of the assembly of the dust cover and the universal joint at the outer end of the constant velocity drive shaft of this utility model. Detailed Implementation

[0011] The present invention will be further described below with reference to specific embodiments.

[0012] like Figure 3 and Figure 4 As shown, the dust cover 6 in this embodiment is a hollow body with openings at both ends, made of thermoplastic elastomer. The inner diameter of its large end opening 1 is interference-fitted with the outer circle of the opening end of the bell-shaped shell 7, and the inner diameter of its small end opening 5 is matched with the outer circle of the connecting end of the shaft 8. Three peaks 3 and two troughs 2 are distributed on its intermediate wall. A recess 4 with its central axis parallel to the overall central axis is also provided on the wall near the small end opening 5. Preferably, the thermoplastic elastomer is DuPont 8341C thermoplastic elastomer, DSM thermoplastic elastomer, EB464 thermoplastic elastomer, or Jiangsu Hechuang's H45DBT thermoplastic elastomer; alternatively, domestically produced materials with equivalent performance can also be used.

[0013] The above-described embodiments are merely preferred and exemplary, and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dust cover for the universal joint at the outer end of a constant velocity drive shaft, characterized in that: It is a hollow body with two openings made of thermoplastic elastomer. The inner diameter of the large end opening is interference-fitted with the outer circle of the bell-shaped shell opening, and the inner diameter of the small end opening is matched with the outer circle of the shaft connection end. There are 3 peaks and 2 troughs distributed on its intermediate wall. There is also an indentation on the wall near the small end opening with the central axis parallel to the overall central axis.

2. The dust cover for the universal joint at the outer end of the constant velocity drive shaft according to claim 1, characterized in that: The thermoplastic elastomer used is DuPont 8341C thermoplastic elastomer, DSM thermoplastic elastomer, EB464 thermoplastic elastomer, or Jiangsu Hechuang's H45DBT thermoplastic elastomer.

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