Automobile drive shaft assembly with redundancy protection structure

Abstract

The utility model provides a kind of automobile drive shaft assembly with redundancy protection structure. Mainly solve the problem that conventional drive shaft universal joint generally uses single-layer rubber dust cover structure, is easily damaged. It is characterized in that: the dust cover includes inner cover (4), including first corrugated section (41) and the first connecting end (42) being equipped with first corrugated section both ends;Outer cover (5), including second corrugated section (51) and the second connecting end (52) being equipped with second corrugated section both ends;The second corrugated section is located the outside of the first corrugated section and there is gap between the two, and the second connecting end is connected with the first connecting end. The utility model provides a kind of automobile drive shaft assembly with redundancy protection structure, it increases a vice protective cover on the basis of traditional single-layer dust cover, forms main-vice double insurance mechanism, significantly improves the reliability and security of drive shaft.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to an automotive drive shaft assembly with a redundant protection structure. Background Technology

[0002] The drive shaft assembly is a key component of the automotive transmission system, transmitting power at varying angles via universal joints. The proper functioning of universal joints (especially ball-cage universal joints) relies on internal specialized grease and the precise engagement of raceways and steel balls. To prevent the intrusion of contaminants such as dust, mud, and water, as well as grease leakage, universal joints are equipped with rubber dust covers.

[0003] Currently, most drive shaft universal joints on the market use a single-layer rubber dust cover structure. This structure has a significant drawback: after long-term use, the rubber cover can rupture due to aging, fatigue, being punctured by road stones, or accidental scraping, causing the universal joint to quickly lose its seal. Contaminants entering will drastically accelerate wear, and grease leakage will lead to dry friction, ultimately causing the universal joint to completely fail within a very short time (perhaps after only a few dozen kilometers of driving), resulting in abnormal noises, vibrations, or even power loss, posing a safety hazard. Furthermore, vehicle owners or drivers often fail to notice early damage to the dust cover, frequently discovering it only after the universal joint itself has already failed, resulting in high repair costs. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides an automotive drive shaft assembly with a redundant protection structure, which mainly solves the problem that conventional drive shaft universal joints generally use a single-layer rubber dust cover structure, which is easily damaged.

[0005] The technical solution of this utility model is as follows:

[0006] A vehicle drive shaft assembly with a redundant protection structure includes an intermediate shaft. One end of the intermediate shaft has a first universal joint, and the other end has a second universal joint. The first universal joint includes a housing and a dust cover. One end of the dust cover is connected to the circumferential outer wall of the intermediate shaft, and the other end is connected to the circumferential outer wall of the housing. The dust cover includes...

[0007] The inner cover includes a first corrugated section and first connecting ends provided at both ends of the first corrugated section;

[0008] The outer cover includes a second corrugated section and second connecting ends at both ends of the second corrugated section; the second corrugated section is located outside the first corrugated section and there is a gap between the two; the second connecting ends are connected to the first connecting ends.

[0009] The outer cover is made of engineering plastic.

[0010] The inner cover is made of neoprene rubber.

[0011] The outer wall of the first connecting end is provided with a groove, and the bottom of the second connecting end is provided with a pressure block that is adapted to the groove.

[0012] The outer wall of the second connecting end is provided with a fixing groove, and also includes a clamp, which is installed in the fixing groove.

[0013] The outer cover is made of transparent or semi-transparent material.

[0014] The first connecting end includes an inner connecting end, the bottom of which is provided with a protruding ridge, and the intermediate shaft is provided with an annular groove adapted to the protruding ridge.

[0015] The beneficial effects of this utility model are: This utility model provides an automotive drive shaft assembly with a redundant protection structure. By adding a secondary protective cover to the traditional single-layer dust cover, a main and secondary double insurance mechanism is formed, which significantly improves the reliability and safety of the drive shaft. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of one embodiment of the present invention.

[0017] Figure 2 for Figure 1 Enlarged diagram of point A in the middle. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. An automotive drive shaft assembly with a redundant protection structure includes an intermediate shaft 1. One end of the intermediate shaft is provided with a first universal joint 2, and the other end with a second universal joint 3. The first universal joint includes a housing 21 and a dust cover. One end of the dust cover is connected to the circumferential outer wall of the intermediate shaft, and the other end is connected to the circumferential outer wall of the housing. The dust cover includes an inner cover 4, comprising a first corrugated section 41 and first connecting ends 42 at both ends of the first corrugated section; and an outer cover 5, comprising a second corrugated section 51 and second connecting ends 52 at both ends of the second corrugated section. The second corrugated section is located outside the first corrugated section, and there is a gap between them. The second connecting ends are connected to the first connecting ends. The corrugated sections of the outer cover and the inner cover do not contact each other, thus not affecting the normal deformation and movement of the inner cover, and having no adverse effect on the dynamic balance and NVH performance of the drive shaft. One of the first connecting ends is connected to the outer wall of the housing, and the other of the first connecting ends is connected to the outer wall of the intermediate shaft. At the same time, a second connecting end is connected to a first connecting end in a one-to-one correspondence.

[0019] In this embodiment, as shown in the figure, the outer cover is made of engineering plastic. The outer cover has a simple structure, is injection molded from engineering plastic, and is inexpensive. However, it can avoid replacement costs of several thousand yuan due to premature damage to the universal joint, resulting in significant economic benefits.

[0020] In this embodiment, as shown in the figure, the inner cover is made of neoprene rubber. The main rubber dust cover is responsible for the primary, flexible sealing and vibration isolation. The outer rigid plastic cover serves as a second line of defense, protecting the inner cover from most direct impacts such as flying stones and scratches when it is intact. When the inner cover breaks for any reason, the outer cover can immediately take over, providing basic protection, effectively blocking most large particulate contaminants from entering and preventing large-scale grease splashing and leakage.

[0021] In this embodiment, as shown in the figure, the outer wall of the first connecting end is provided with a groove 421, and the bottom of the second connecting end is provided with a pressure block 521 that matches the groove. This facilitates positioning and installation.

[0022] In this embodiment, as shown in the figure, the outer wall of the second connecting end is provided with a fixing groove 522, and also includes a clamp 55, which is installed in the fixing groove. After the clamp is tightened, it will fix the outer cover and the inner cover simultaneously.

[0023] In this embodiment, as shown in the figure, the outer cover is made of a transparent or semi-transparent material. When the outer cover is made of transparent or semi-transparent plastic, the user can visually observe the condition of the main dust cover (such as whether it is damaged or leaking oil) without disassembling it, which facilitates daily inspection and maintenance.

[0024] In this embodiment, as shown in the figure, the first connecting end includes an inner connecting end 422, the bottom of which is provided with a protruding ridge 423, and the intermediate shaft is provided with an annular groove 11 that matches the protruding ridge. This makes the installation more stable.

[0025] 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.

[0026] 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.

[0027] 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 vehicle drive shaft assembly with a redundant protection structure, comprising an intermediate shaft (1), wherein a first universal joint (2) is provided at one end of the intermediate shaft and a second universal joint (3) is provided at the other end, the first universal joint comprising a housing (21) and a dust cover, wherein one end of the dust cover is connected to the circumferential outer wall of the intermediate shaft and the other end is connected to the circumferential outer wall of the housing, characterized in that: The dust cover includes The inner cover (4) includes a first corrugated section (41) and first connecting ends (42) provided at both ends of the first corrugated section; The outer cover (5) includes a second corrugated section (51) and a second connecting end (52) provided at both ends of the second corrugated section; the second corrugated section is located outside the first corrugated section and there is a gap between the two, and the second connecting end is connected to the first connecting end.

2. The automotive drive shaft assembly with redundant protection structure according to claim 1, characterized in that: The outer cover is made of engineering plastic.

3. The automotive drive shaft assembly with redundant protection structure according to claim 1, characterized in that: The inner cover is made of neoprene rubber.

4. The automotive drive shaft assembly with redundant protection structure according to claim 1, characterized in that: The outer wall of the first connecting end is provided with a groove (421), and the bottom of the second connecting end is provided with a pressure block (521) that is adapted to the groove.

5. The automotive drive shaft assembly with redundant protection structure according to claim 1, characterized in that: The outer wall of the second connecting end is provided with a fixing groove (522) and also includes a clamp (55), which is installed in the fixing groove.

6. The automotive drive shaft assembly with redundant protection structure according to claim 1, characterized in that: The outer cover is made of transparent or semi-transparent material.

7. An automotive drive shaft assembly with a redundant protection structure according to any one of claims 1-6, characterized in that: The first connecting end includes an inner connecting end (422), the bottom of which is provided with a protruding ridge (423), and the intermediate shaft is provided with an annular groove (11) adapted to the protruding ridge.

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