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

Abstract

The dust cover is a hollow body which is made of a thermoplastic elastomer and is provided with openings at the two ends, the inner diameter of the opening at the large end of the dust cover is in interference fit with the outer circle of the opening end of a bell housing, the inner diameter of the opening at the small end of the dust cover is matched with the outer circle of the connecting end of a shaft rod, 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 size of the inner envelope space is reduced, the self weight is reduced, the raw material cost is effectively reduced, and the development of vehicles in the light weight and low cost direction can be met.

Description

Technical Field

[0001] The invention belongs to the field of automobile parts and relates to a universal joint dust cover at the outer end of a constant velocity drive shaft. Background Art

[0002] The existing constant speed drive shaft outer dust cover 06 is a structure with multiple wave crests 03 and multiple wave valleys 02, such as Figure 1 As shown, 01 is the large end opening and 04 is the small end opening, which meets the requirements of large turning angles of the wheel end universal joint and stores grease for continuous lubrication of the outer end constant velocity universal joint. The inner envelope space is large in volume, and many raw materials are used, which has high raw material costs and heavy weight, and cannot meet the development 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 the present invention is to solve the above-mentioned problems existing in the prior art and to provide a dust cover for the universal joint at the outer end of a constant velocity drive shaft. The dust cover reduces the volume of the inner envelope space and its own weight while ensuring its own function, thereby effectively reducing the cost of raw materials and meeting the development of vehicles towards lightweight and low cost.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a universal joint dust cover at the outer end of a constant-speed 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 matched with the outer circle of the opening end of the bell shell, and the inner diameter of the small end opening is matched with the outer circle of the shaft connecting end, and there are 3 peaks and 2 troughs distributed on the intermediate wall, and an inner depression with a central axis parallel to the overall central axis is also provided on the wall near the small end opening.

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

[0006] Compared with the prior art, the advantages of the present invention are as follows: the present invention adopts a structural design of wave crests, wave troughs and inner depressions, which can be used to provide a large rotation angle of the outer end universal joint and provide the outer end universal joint with resistance to impacts such as stones during service. It also reduces the volume of the inner envelope space, reduces its own weight, effectively reduces the cost of raw materials, and can meet the development of vehicles in the direction of lightweight and low cost. Since grease needs to be injected into the outer dust cover to lubricate and supplement the constant velocity universal joint, the reduction of the inner envelope volume of the outer dust cover will also reduce the amount of grease loaded in the dust cover, thereby reducing the cost of grease. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is the main view of the existing dust cover; Figure 2 It is a front view of the assembly of the existing dust cover and the universal joint at the outer end of the constant velocity drive shaft; Figure 3 It is a front view of the dust cover of the present invention; Figure 4 The figure is a front view of the assembly of the dust cover and the universal joint at the outer end of the constant velocity drive shaft according to the present invention. DETAILED DESCRIPTION

[0008] The present invention is further described below in conjunction with specific embodiments.

[0009] like Figure 3 and Figure 4 As shown, the dust cover 6 of this embodiment is a hollow body with two ends opened and made of thermoplastic elastomer, the inner diameter of the large end opening 1 is interference matched with the outer circle of the open end of the bell housing 7, and the inner diameter of the small end opening 5 is matched with the outer circle of the connecting end of the shaft rod 8, and there are three wave peaks 3 and two wave valleys 2 distributed on the intermediate wall, and an inner depression 4 with a central axis parallel to the overall central axis is also provided on the wall near the small end opening 5. Preferably, the thermoplastic elastomer adopts DuPont 8341C thermoplastic elastomer or DSM thermoplastic elastomer or EB464 thermoplastic elastomer or Jiangsu Hechuang H45DBT thermoplastic elastomer, and domestic materials with equivalent performance can also be used.

[0010] The above-described embodiments are only 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 in the protection scope of the present invention.

Claims

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

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

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