A drive shaft assembly having a pressure relief dust shield

Abstract

A drive shaft assembly with a pressure-relief dust cover is disclosed. This invention primarily addresses the problem that current drive shaft dust covers lack a pressure-relief structure. Its features include: a dust cover (4) connected at one end to the intermediate shaft and at the other end to the outer wall of the housing; the circumferential wall of the dust cover includes an elastically retractable section (41), which seals against the circumferential outer wall of the intermediate shaft and divides the dust cover into a first chamber (42) and a second chamber (43), the second chamber communicating with the inner cavity of the housing; a pressure relief hole (44) is provided on the dust cover and communicates with the first chamber. When the pressure inside the housing exceeds a threshold, the retractable section moves away from the circumferential outer wall of the intermediate shaft, allowing the first and second chambers to communicate. This invention provides a drive shaft assembly with a pressure-relief dust cover, providing pressure relief capability without affecting sealing performance, preventing excessive pressure inside the dust cover.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a drive shaft assembly with a pressure relief dust cover. Background Technology

[0002] Automotive driveshaft assemblies are generally equipped with dust covers. Conventional dust covers are completely sealed structures. When the driveshaft rotates, the internal temperature of the dust cover will rise and the internal pressure will increase. Since there is no pressure relief structure, conventional dust covers will be stretched and even ruptured, affecting the service life of the dust cover. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a drive shaft assembly with a pressure relief dust cover, which mainly solves the problem that the dust cover of the current drive shaft does not have a pressure relief structure.

[0004] The technical solution of this utility model is as follows:

[0005] A drive shaft assembly with a pressure-relief dust cover includes an intermediate shaft, one end of which is connected to a first universal joint, and the other end of which is connected to a second universal joint. The first universal joint includes a housing and further includes...

[0006] A dust cover, one end of which is connected to the intermediate shaft and the other end of which is connected to the outer wall of the housing; the circumferential wall of the dust cover includes an elastically retractable section, which is sealed to the circumferential outer wall of the intermediate shaft and divides the dust cover into a first chamber and a second chamber, the second chamber being in communication with the inner cavity of the housing;

[0007] A pressure relief hole is provided on the dust cover and communicates with the first chamber;

[0008] When the converging segment is pressed beyond a threshold within the housing, it leaves the circumferential outer wall of the intermediate shaft, thus connecting the first chamber and the second chamber.

[0009] The volume of the first chamber is smaller than the volume of the second chamber.

[0010] The dust cover is connected to the intermediate shaft by a clamp.

[0011] The intermediate shaft has a cavity inside.

[0012] The intermediate shaft comprises multiple sub-shafts, which are connected by friction welding.

[0013] The housing has a detachable side cover on its axially outer side.

[0014] The outer wall of the housing is provided with a protruding ring, and the side cover is provided with a groove that mates with the protruding ring.

[0015] A sealing ring is provided between the side cover and the axial outer wall of the housing.

[0016] The beneficial effects of this utility model are: This utility model provides a drive shaft assembly with a pressure relief dust cover, which provides pressure relief capability without affecting the sealing performance, and prevents excessive pressure inside the dust cover. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0018] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0019] Figure 3 for Figure 1 Enlarged diagram of point C in the middle. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings. A drive shaft assembly with a pressure-relief dust cover includes an intermediate shaft 1. One end of the intermediate shaft is connected to a first universal joint 2, and the other end of the intermediate shaft is connected to a second universal joint 3. The first universal joint includes a housing 21 and a dust cover 4. One end of the dust cover is connected to the intermediate shaft, and the other end is connected to the outer wall of the housing. The circumferential wall of the dust cover includes an elastically retractable section 41. The retractable section is sealed to the circumferential outer wall of the intermediate shaft and divides the dust cover into a first chamber 42 and a second chamber 43. The second chamber communicates with the inner cavity of the housing. A pressure relief hole 44 is provided on the dust cover and communicates with the first chamber. When the pressure inside the housing exceeds a threshold, the retractable section leaves the circumferential outer wall of the intermediate shaft, allowing the first chamber and the second chamber to communicate. When the temperature in the second chamber rises and the internal pressure becomes excessive, the retractable section expands, connecting the first and second chambers. Gas is then released through the pressure relief hole, achieving the function of pressure relief. Normally, the retractable section relies on its own elasticity to achieve a seal with the intermediate shaft, preventing foreign objects from entering the second chamber through the pressure relief hole. The elasticity of the retractable section is derived from its own material.

[0021] In this embodiment, as shown in the figure, the volume of the first chamber is smaller than the volume of the second chamber.

[0022] In this embodiment, as shown in the figure, the dust cover is connected to the intermediate shaft via clamp 46. Disassembly and assembly are relatively convenient.

[0023] In this embodiment, as shown in the figure, a cavity 11 is provided inside the intermediate shaft. This reduces weight.

[0024] In this embodiment, as shown in the figure, the intermediate shaft includes multiple sub-shafts 111, which are connected by friction welding.

[0025] In this embodiment, as shown in the figure, a detachable side cover 22 is provided on the axially outer side of the housing. It can be disassembled for internal cleaning if necessary.

[0026] In this embodiment, as shown in the figure, the outer wall of the housing is provided with a protruding ring 211, and the side cover is provided with a groove 221 that mates with the protruding ring. Disassembly and assembly are relatively convenient.

[0027] In this embodiment, as shown in the figure, a sealing ring 25 is provided between the side cover and the axial outer wall of the housing to prevent leakage.

[0028] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "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, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A drive shaft assembly with pressure relief dust shield, comprising a middle shaft (1), one end of the middle shaft is connected with a first universal joint (2), the other end of the middle shaft is connected with a second universal joint (3), the first universal joint comprises a shell (21), characterized in that: Also includes Dust cover (4), one end of the dust cover is connected to the intermediate shaft, and the other end is connected to the outer wall of the housing; the circumferential wall of the dust cover includes an elastic retractable section (41), the retractable section is sealed to the circumferential outer wall of the intermediate shaft and divides the dust cover into a first chamber (42) and a second chamber (43), the second chamber is connected to the inner cavity of the housing; A pressure relief hole (44) is provided on the dust cover and communicates with the first chamber; When the converging segment is pressed beyond a threshold within the housing, it leaves the circumferential outer wall of the intermediate shaft, thus connecting the first chamber and the second chamber.

2. A propeller shaft assembly having a pressure relief boot according to claim 1, wherein: The volume of the first chamber is smaller than the volume of the second chamber.

3. A propeller shaft assembly having a pressure relief boot cover as defined in claim 1, wherein: The dust cover is connected to the intermediate shaft by a clamp (46).

4. A propeller shaft assembly having a pressure relief boot according to claim 3, wherein: The intermediate shaft has a cavity (11) inside.

5. A propeller shaft assembly having a pressure relief boot cover according to claim 4, wherein: The intermediate shaft includes multiple sub-shafts (111), which are connected by friction welding.

6. A propeller shaft assembly having a pressure relief boot according to any one of claims 1-5, characterized in that: The housing is provided with a detachable side cover (22) on its axial outer side.

7. A drive shaft assembly with a pressure-relief dust cover according to claim 6, characterized in that: The outer wall of the housing is provided with a protruding ring (211), and the side cover is provided with a groove (221) that mates with the protruding ring.

8. A propeller shaft assembly having a pressure relief boot according to claim 7, wherein: A sealing ring (25) is provided between the side cover and the axial outer wall of the housing.

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