A detachable end face tooth connection structure transmission shaft assembly

Abstract

A detachable end face tooth connection structure transmission shaft assembly. To solve the problem that the current transmission shaft is easy to wear through spline connection. Its characterized in that: it further includes a retainer (4) arranged in the housing, a plurality of rolling elements (41) are arranged on the retainer; a star-shaped sleeve (5) is arranged in the housing and is detachably connected with the intermediate shaft extending into the housing, the rolling elements are matched with the star-shaped sleeve; a first end face tooth (51) is arranged on the axial outer end face of the star-shaped sleeve; a second end face tooth is arranged on the axial outer wall of the intermediate shaft and is matched with the first end face tooth. The utility model provides a detachable end face tooth connection structure transmission shaft assembly, through end face tooth cooperation, compared with traditional spline connection, the number of teeth is more, the contact area is large, and the tooth surface stress distribution is more uniform, which can effectively improve the torque transmission capacity and the impact resistance.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a drive shaft assembly with a detachable end face tooth connection structure. Background Technology

[0002] In the field of mechanical transmission, the drive shaft, as a core component for power transmission, directly affects the operating efficiency and lifespan of equipment due to the reliability and performance of its connection structure. Traditional drive shafts often use spline connections (such as rectangular splines and involute splines), which can achieve torque transmission, but have revealed significant shortcomings in long-term use: on the one hand, the spline tooth surfaces are prone to wear due to sliding friction during frequent meshing, leading to increased clearance and causing vibration and noise; on the other hand, the load-bearing capacity of splines is limited by the tooth structure, and they are prone to local deformation or even failure under heavy load and impact conditions, making it difficult to meet the application requirements of high torque and high reliability.

[0003] With the development of electric vehicles, the demand for high-power, high-load transmission is increasing, and traditional connection methods can no longer meet extreme operating conditions. For example, during the instantaneous acceleration of an electric vehicle, the drive shaft needs to withstand instantaneous impact loads and continuous high torque. Wear and vibration problems of spline connections, as well as other usage scenarios, further exacerbate the failure risk of spline connections. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a drive shaft assembly with a detachable end face tooth connection structure, which mainly solves the problem that current drive shafts connected by splines are prone to wear.

[0005] The technical solution of this utility model is as follows: A drive shaft assembly with a detachable end-face gear connection structure 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... A retainer is disposed within the housing, and the retainer is provided with a plurality of rolling elements; A star-shaped sleeve is disposed inside the housing and is detachably connected to an intermediate shaft extending into the housing; the rolling element cooperates with the star-shaped sleeve. The first end face tooth is provided on the axial outer end face of the star-shaped sleeve; The second end face tooth is located on the axial outer wall of the intermediate shaft and mates with the first end face tooth.

[0006] It also includes a large screw for mounting the star-shaped sleeve to the intermediate shaft.

[0007] The large screw includes a cap, which is connected to the axial end face of the star-shaped sleeve by a small screw.

[0008] The rolling element is a steel ball.

[0009] The housing includes a first housing and a second housing that are detachably connected, and the first housing has a groove that mates with the rolling element.

[0010] The second housing is provided with a drive shaft.

[0011] The first housing and the second housing are connected by fasteners.

[0012] A sealing ring is provided between the first housing and the second housing.

[0013] The beneficial effects of this utility model are: This utility model provides a drive shaft assembly with a detachable end face tooth connection structure. Through end face tooth engagement, compared with the traditional spline connection, it has more teeth, larger contact area, and more uniform stress distribution on the tooth surface, which can effectively improve torque transmission capability and strong impact resistance. Attached Figure Description

[0014] Figure 1 This is a cross-sectional schematic diagram of one embodiment of the present invention.

[0015] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0016] Figure 3 for Figure 2 A schematic diagram of the K-direction.

[0017] Figure 4 for Figure 2 A schematic diagram of the F-direction. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. A drive shaft assembly with a detachable end-face tooth connection structure includes an intermediate shaft 1, one end of which is connected to a first universal joint 2, and the other end of which is connected to a second universal joint 3. The first universal joint includes a housing and a retainer 4 disposed within the housing, the retainer having a plurality of rolling elements 41; a star-shaped sleeve 5 disposed within the housing and detachably connected to the intermediate shaft extending into the housing, the rolling elements cooperating with the star-shaped sleeve; a first end-face tooth 51 disposed on the axial outer end face of the star-shaped sleeve; and a second end-face tooth disposed on the axial outer wall of the intermediate shaft and cooperating with the first end-face tooth. Through the end-face tooth engagement, compared to the traditional spline connection, it has more teeth, a larger contact area, and a more uniform stress distribution on the tooth surface, effectively improving torque transmission capacity and providing strong impact resistance. Compared to splines, face teeth are easier to machine. Through a process of warm forging of the blank, residual heat normalizing, and surface treatment, combined with pre-spinning and precision milling of the intermediate cutter head, high-precision forming of face teeth can be achieved (error can be controlled within 0.02mm). This high-precision machining not only ensures the flatness of the tooth surface and the accuracy of the tooth profile but also improves the fit accuracy of the half-shaft and extends its service life. The detachable connection design of the face teeth makes assembly and maintenance more convenient. When it is necessary to replace the half-shaft or other parts, only the bolts need to be removed, without complicated disassembly steps. This product effectively solves the pain points of traditional transmission methods, such as large axial clearance, weak load-bearing capacity, short fatigue life, low transmission efficiency, and difficult manufacturing and assembly without disassembly.

[0019] In this embodiment, as shown in the figure, a large screw 61 is also included, which is used to install the star-shaped sleeve and the intermediate shaft together. Disassembly and assembly are relatively convenient.

[0020] In this embodiment, as shown in the figure, the large screw includes a cap 62, which is connected to the axial end face of the star-shaped sleeve via a small screw 63. Disassembly and assembly are relatively convenient.

[0021] In this embodiment, as shown in the figure, the rolling element is a steel ball.

[0022] In this embodiment, as shown in the figure, the housing includes a first housing 11 and a second housing 12 that are detachably connected. The first housing has a groove that mates with the rolling element. If the groove is damaged, the first housing can be replaced.

[0023] In this embodiment, as shown in the figure, a drive shaft 121 is provided on the second housing.

[0024] In this embodiment, as shown in the figure, the first housing and the second housing are connected by fasteners 13. These fasteners can be screws, bolts, etc.

[0025] In this embodiment, as shown in the figure, a sealing ring 14 is provided between the first housing and the second housing to prevent leakage.

[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 assembly with a detachable end-face gear connection structure, comprising an intermediate shaft (1), one end of which is connected to a first universal joint (2), and the other end of which is connected to a second universal joint (3), wherein the first universal joint includes a housing, characterized in that: Also includes A retainer (4) is disposed inside the housing, and a plurality of rolling elements (41) are provided on the retainer. A star-shaped sleeve (5) is disposed inside the housing and is detachably connected to an intermediate shaft extending into the housing. The rolling element cooperates with the star-shaped sleeve. The first end face tooth (51) is provided on the axial outer end face of the star-shaped sleeve; The second end face tooth is located on the axial outer wall of the intermediate shaft and mates with the first end face tooth.

2. The drive shaft assembly with a detachable end face gear connection structure according to claim 1, characterized in that: It also includes a large screw (61) for mounting the star-shaped sleeve to the intermediate shaft.

3. The drive shaft assembly with a detachable end-face gear connection structure according to claim 2, characterized in that: The large screw includes a cap (62), which is connected to the axial end face of the star-shaped sleeve by a small screw (63).

4. The drive shaft assembly with a detachable end face gear connection structure according to claim 1, characterized in that: The rolling element is a steel ball.

5. The drive shaft assembly with a detachable end face gear connection structure according to claim 1, characterized in that: The housing includes a first housing (11) and a second housing (12) that are detachably connected, wherein the first housing has a groove that mates with the rolling element.

6. The drive shaft assembly with a detachable end face gear connection structure according to claim 5, characterized in that: The second housing is provided with a drive shaft (121).

7. The drive shaft assembly with a detachable end face gear connection structure according to claim 1, characterized in that: The first housing and the second housing are connected by fasteners (13).

8. The drive shaft assembly with a detachable end face gear connection structure according to claim 7, characterized in that: A sealing ring (14) is provided between the first housing and the second housing.

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