A drive shaft with an integrated oil seal sleeve

Abstract

A driveshaft with an integrated oil seal sleeve. This invention primarily addresses the problem of the current driveshaft's protective components (oil seal sleeve and retaining ring) being designed as separate parts, leading to cumbersome manufacturing. Its features include: a half-shaft (22) connected to the housing for connection to a differential; and a retaining ring (4) comprising a ring body (41) with an integrally formed protective ring (5) for relative positioning with the oil seal on the differential. This invention provides a driveshaft with an integrated, lightweight, and easily manufactured integrated oil seal sleeve.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a drive shaft with an integrated oil seal sleeve. Background Technology

[0002] Constant velocity joints are core components of automotive transmission systems, and the structural design of their protective components (oil seal and retaining ring) directly affects their service life and operational stability. Current traditional solutions employ a split design: the retaining ring is stamped from DC04 steel sheet, while the oil seal requires multiple processes including forging, machining, and heat treatment. However, this split structure results in a large overall weight, making it difficult to meet the lightweight requirements of new energy vehicles. Furthermore, the manufacturing process involves multiple process conversions, leading to high processing costs, long lead times, and assembly errors that can easily degrade sealing performance. Therefore, there is an urgent need to develop an integrated, lightweight, one-piece protective component to optimize production efficiency and product reliability. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a drive shaft with an integrated oil seal sleeve, which mainly solves the problem that the current drive shaft protection components (oil seal sleeve and protective ring) adopt a separate design, which is troublesome to manufacture.

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

[0005] A drive shaft with an integrated oil seal includes an intermediate shaft, one end of which is connected to a first universal joint, and the other end is provided with a second universal joint. The first universal joint includes a housing and further includes...

[0006] A half-shaft, connected to the housing, is used for connection to the differential;

[0007] The protective ring includes a ring body, on which a protective ring is integrally provided. The protective ring is used to be positioned opposite to the oil seal on the differential.

[0008] The protective ring is made of heat-resistant plastic.

[0009] The protective ring includes a ring body extending along the axial direction of the ring body, and the ring body is connected to the ring body through a connecting wall.

[0010] The ring body is provided with mounting holes along its axial direction for engaging with the half shaft.

[0011] The heat-resistant plastic is polyetheretherketone, polyphenylene sulfide, or polysulfone.

[0012] The first universal joint is a three-ball pin universal joint.

[0013] The second universal joint is a ball cage type universal joint.

[0014] The ring body is also provided with a through hole in the axial direction. The through hole is clearance-fitted with the half shaft and communicates with the mounting hole. The ring body is circumferentially outside the through hole.

[0015] The beneficial effects of this utility model are: This utility model provides a drive shaft with an integrated oil seal sleeve, which has an integrated and lightweight integrated oil seal sleeve, making it convenient to manufacture. Attached Figure Description

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

[0017] Figure 2 This is a partial explosion diagram of one embodiment of the present invention. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. A drive shaft with an integrated oil seal sleeve includes an intermediate shaft 1, one end of which is connected to a first universal joint 2, and the other end is provided with a second universal joint. The first universal joint includes a housing 21 and a half-shaft 22 connected to the housing for connection with a differential. A protective ring 4 includes a ring body 41, on which a protective ring 5 is integrally provided. The protective ring is positioned opposite to the oil seal on the differential. The protective ring 5 and the differential oil seal form a closed or semi-closed dustproof space. The entire assembly is made of heat-resistant plastic and manufactured by injection molding. It features an integrated, lightweight, one-piece oil seal sleeve, which is convenient to manufacture.

[0019] In this embodiment, the retaining ring is made of heat-resistant plastic. Molding of the heat-resistant plastic (such as PEEK, PPS, etc.) in a single step simplifies the traditional separate processing steps of stamping and forging, improving structural consistency. High-strength engineering plastics are selected, with a density more than 50% lower than metals, temperature resistance up to 200℃, and wear and corrosion resistance, making them suitable for the harsh operating conditions of new energy vehicles.

[0020] In this embodiment, as shown in the figure, the protective ring includes a ring body 51 extending along the axial direction of the ring body, and the ring body is connected to the ring body through a connecting wall 52. This increases strength.

[0021] In this embodiment, as shown in the figure, the ring body is provided with a mounting hole 42 along its axial direction for engaging with the half-shaft. Assembly can be achieved through interference fit.

[0022] In this embodiment, as shown in the figure, the heat-resistant plastic is polyetheretherketone (PEEK), polyphenylene sulfide (PPS), or polysulfone (PSU).

[0023] In this embodiment, as shown in the figure, the first universal joint is a three-ball pin universal joint.

[0024] In this embodiment, as shown in the figure, the second universal joint is a ball cage type universal joint.

[0025] In this embodiment, as shown in the figure, the ring body is also provided with a through hole 43 along its axial direction. The through hole is in clearance fit with the half shaft and communicates with the mounting hole. The ring body is circumferentially outside the through hole. The inner wall of the ring body portion opposite to the ring body is in clearance fit, providing a certain deformation and shrinkage capability.

[0026] 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.

[0027] 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.

[0028] 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 with an integrated oil seal sleeve, comprising an intermediate shaft (1), one end of which is connected to a first universal joint (2), and the other end of which is provided with a second universal joint, wherein the first universal joint includes a housing (21), characterized in that: Also includes Half shaft (22), connected to the housing, for connection with the differential; The protective ring (4) includes a ring body (41) on which a protective ring (5) is integrally provided. The protective ring is used to be arranged opposite to the oil seal on the differential.

2. A drive shaft with an integrated oil seal sleeve according to claim 1, characterized in that: The protective ring is made of heat-resistant plastic.

3. A drive shaft with an integrated oil seal sleeve according to claim 1, characterized in that: The protective ring includes a ring body (51) extending along the axial direction of the ring body, and the ring body is connected to the ring body through a connecting wall (52).

4. A drive shaft with an integrated oil seal sleeve according to claim 3, characterized in that: The ring body is provided with mounting holes (42) in the axial direction for engaging with the half shaft.

5. A drive shaft with an integrated oil seal sleeve according to claim 2, characterized in that: The heat-resistant plastic is polyetheretherketone, polyphenylene sulfide, or polysulfone.

6. A drive shaft with an integrated oil seal according to any one of claims 1-5, characterized in that: The first universal joint is a three-ball pin universal joint.

7. A drive shaft with an integrated oil seal according to any one of claims 1-5, characterized in that: The second universal joint is a ball cage type universal joint.

8. A drive shaft with an integrated oil seal according to claim 4, characterized in that: The ring body is also provided with a through hole (43) in the axial direction. The through hole is in clearance fit with the half shaft. The through hole is connected to the mounting hole. The ring body is circumferentially outside the through hole.

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