Composite armored semi-rigid dust cover for automobile constant velocity universal joint

Abstract

The utility model discloses a composite armored semi-rigid dust cover for an automobile constant velocity universal joint. The universal joint dust cover mainly solves the problem that the universal joint dust cover is poor in physical damage resistance. The protective cover is characterized in that a protective layer (2) made of metal is connected with the hoop and arranged on the circumferential outer side of the cover body; and the surface coating (3) is arranged on the outer wall of the cover body and is used for reflecting infrared rays. The utility model provides a composite armored semi-rigid dust cover for a constant velocity universal joint of an automobile, which is provided with a protective layer made of metal to prevent flying stones on a road surface and prevent the dust cover from being broken down; and the ceramic-based reflecting coating is sprayed on the surface, so that the infrared wave band is mainly prevented, the infrared radiation absorption rate of the cover body is reduced by 40% to the maximum, and the cover body failure caused by excessive heat absorption of the cover body is avoided.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a composite armored semi-rigid dust cover for automotive constant velocity universal joints. Background Technology

[0002] Currently, automotive constant velocity joint dust covers generally face three major technical bottlenecks:

[0003] (i) Poor resistance to physical damage: Traditional rubber / TPE covers are easily punctured by flying stones on the road during high-speed driving (according to statistics, puncture failure accounts for 63% of the total failure rate of dust covers), resulting in grease leakage and universal joint wear failure.

[0004] (ii) Insufficient dynamic sealing reliability: Under the condition of large-angle bending, the stress concentration at the root of the existing dust cover causes fatigue cracks (bending life is generally <2 million times), and the lip seal loses its sealing function when the wear exceeds 0.3mm.

[0005] (iii) Poor adaptability to high temperature environment: The temperature near the motor can reach 150℃, and the hardness change rate of rubber material is >40%, which accelerates aging and deformation.

[0006] Existing improvement solutions, such as thickening the cover (increasing weight by 30%) and attaching external metal protective plates (interfering with movement space), have not fundamentally solved the problem. Therefore, there is an urgent need to develop a new dust cover structure that combines flexible freedom of movement with rigid protective capabilities. Utility Model Content

[0007] In order to overcome the shortcomings of the prior art, this utility model provides a composite armored semi-rigid dust cover for automotive constant velocity universal joints, which mainly solves the problem of poor resistance to physical damage of universal joint dust covers.

[0008] The technical solution of this utility model is as follows:

[0009] A composite armored semi-rigid dust cover for automotive constant velocity joints includes a cover body with clamps mounted on it, and further includes...

[0010] A protective layer made of metal is connected to the clamp and is located on the outer circumferential side of the cover;

[0011] A surface coating, applied to the outer wall of the enclosure, is used to reflect infrared rays.

[0012] The protective layer is made of stainless steel.

[0013] The protective layer has a mesh structure.

[0014] The cover is made of TPEE.

[0015] It also includes a flexible sensor, which is located on the inner wall of the cover.

[0016] The cover has openings at both ends, and the flexible sensor is installed on the inner wall of at least one of the openings.

[0017] The surface coating is a ceramic-based reflective coating.

[0018] The beneficial effects of this utility model are: This utility model provides a composite armored semi-rigid dust cover for automobile constant velocity universal joints, which is provided with a protective layer made of metal to block flying stones on the road and prevent the dust cover from being penetrated; and a ceramic-based reflective coating is sprayed on the surface to mainly prevent infrared bands, reducing the infrared radiation absorption rate of the cover by up to 40%, and avoiding the cover from failing due to excessive heat absorption. Attached Figure Description

[0019] Figure 1 This is a cross-sectional schematic diagram of one embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of a flexible sensor. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings. A composite armored semi-rigid dust cover for a constant velocity universal joint of an automobile includes a cover body 1, on which a clamp 5 is installed, and a protective layer 2 made of metal connected to the clamp and disposed on the circumferential outer side of the cover body; a surface coating 3 is disposed on the outer wall of the cover body for reflecting infrared rays.

[0022] The installation process involves placing the flexible strain sensor inside the housing and press-fitting it into the large and small ends using an interference fit (the inner wall of the housing has a corresponding groove where the sensor is installed, generally without pressure, but will be subjected to pressure when wear becomes significant). After the housing is surface-coated, the dust cover is installed onto the outside of the universal joint housing, and the clamps are secured. The two ends of the stainless steel mesh are then laser-welded to the clamps at both ends, completing the overall assembly.

[0023] In this embodiment, the protective layer is made of stainless steel. The thickness can be 0.2 mm, the pore size ≤ 3 mm, and the puncture resistance up to 180 N / mm².

[0024] In this embodiment, as shown in the figure, the protective layer has a mesh structure.

[0025] In this embodiment, as shown in the figure, the cover is made of TPEE. Appropriate carbon nanotubes (CNTs) may also be added.

[0026] In this embodiment, as shown in the figure, a flexible sensor 4 is also included, disposed on the inner wall of the cover. A flexible pressure sensor from Suzhou Nengsida Electronic Technology Co., Ltd. can be used. The sensor's wires are led out for connection to the circuit board of the vehicle's central control system. When the lip experiences significant wear, the flexible strain sensor will issue a warning of breakage, prompting replacement.

[0027] In this embodiment, as shown in the figure, the cover has openings 11 at both ends, and the flexible sensor is provided on the inner wall of at least one of the openings.

[0028] In this embodiment, as shown in the figure, the surface coating is a ceramic-based reflective coating. KF-240 series materials from Beikuang New Materials Technology Co., Ltd. can be used.

[0029] 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.

[0030] 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.

[0031] 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 composite armored semi-rigid dust cover for a constant velocity universal joint in an automobile, comprising a cover body (1), wherein a clamp (5) is installed on the cover body, characterized in that: Also includes A protective layer (2) made of metal is connected to the clamp and is located on the outer circumferential side of the cover; A surface coating (3) is applied to the outer wall of the cover to reflect infrared rays.

2. A composite armored semi-rigid dust cover for an automotive constant velocity universal joint according to claim 1, characterized in that: The protective layer is made of stainless steel.

3. A composite armored semi-rigid dust cover for an automotive constant velocity universal joint according to claim 1 or 2, characterized in that: The protective layer has a mesh structure.

4. A composite armored semi-rigid dust cover for an automotive constant velocity universal joint according to claim 1, characterized in that: The cover is made of TPEE.

5. A composite armored semi-rigid dust cover for an automotive constant velocity universal joint according to claim 1, characterized in that: It also includes a flexible sensor (4) disposed on the inner wall of the cover.

6. A composite armored semi-rigid dust cover for an automotive constant velocity universal joint according to claim 5, characterized in that: The cover has openings (11) at both ends, and the flexible sensor is provided on the inner wall of at least one of the openings.

7. A composite armored semi-rigid dust cover for an automotive constant velocity universal joint according to claim 1, characterized in that: The surface coating is a ceramic-based reflective coating.

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