A constant velocity joint drive shaft assembly with a flexible noise reducing support

Abstract

A constant velocity joint drive shaft assembly with a flexible noise reduction bracket. This invention primarily addresses the problem of vibration and noise in traditional constant velocity joint drive shaft assemblies where the drive shaft and bracket are rigidly connected. The assembly is characterized by: including a bracket (4), which comprises an outer shell (41) and an inner shell (42), connected by an elastic element (43); the inner wall of the inner shell contacts the outer wall of the bearing; and the outer shell is provided with a mounting portion (411) for connection to a motor housing. This invention provides a constant velocity joint drive shaft assembly with a flexible noise reduction bracket. The bracket is provided with structural support and load-bearing capacity from metal (e.g., the tensile strength of steel can reach over 400 MPa), while the elastic element (rubber) provides buffering and shock absorption performance (elastic modulus as low as 0.1-10 MPa). The combination of these two elements simultaneously meets the requirements for high strength and impact resistance. The vulcanization technology is relatively mature, facilitating production and processing.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a constant velocity universal joint drive shaft assembly with a flexible noise reduction bracket. Background Technology

[0002] The constant velocity joint drive shaft assembly is a crucial component of an automobile. It consists of a universal joint connecting the power output end of the transmission to the power input end of the vehicle, and another universal joint connecting the power input end to the wheels. To meet requirements such as equal angles, differences in rigidity between the left and right drive shaft assemblies, and space constraints, the right-side longer constant velocity drive shaft assembly is typically designed as a three-section structure. The movable joint shank is designed with a bearing bracket, with a bearing and bracket mounted on it. The bracket holes are bolted to the motor housing via threaded holes on the chassis motor flange. However, traditional brackets are generally one-piece die-cast structures (cast aluminum or cast iron), mounted on the movable joint shank in conjunction with the bearing. This results in a rigid connection between the drive shaft, bracket, and motor, lacking cushioning. Consequently, during vehicle operation, this can lead to drive shaft vibration and noise, affecting overall vehicle comfort. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a constant velocity universal joint drive shaft assembly with a flexible noise reduction bracket, which mainly solves the problem that the drive shaft and bracket of the traditional constant velocity universal joint drive shaft assembly are rigidly connected, which may cause vibration and noise of the drive shaft.

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

[0005] A constant velocity universal joint drive shaft assembly with a flexible noise reduction bracket includes an intermediate shaft. One end of the intermediate shaft 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, a connecting shaft is provided on the housing, and a bearing is provided on the connecting shaft.

[0006] The bracket includes an outer shell and an inner shell, which are connected by an elastic element; the inner wall of the inner shell contacts the outer wall of the bearing, and the outer shell is provided with a mounting part for connection with the motor housing.

[0007] The mounting part is a mounting hole.

[0008] The elastic element is made of rubber.

[0009] The outer shell, elastic element, and inner shell are joined together by vulcanization.

[0010] The inner shell includes a top plate and a side plate, the top plate being located on the circumferential outer side of the bearing, and the side plate being located on the axial outer side of the bearing.

[0011] The connecting shaft is provided with an annular groove, and part of the side plate extends into the annular groove.

[0012] The outer and inner shells are made of alloy steel.

[0013] The beneficial effects of this utility model are: This utility model provides a constant velocity universal joint drive shaft assembly with a flexible noise reduction bracket. The bracket is provided by metal for structural support and load-bearing capacity (such as steel with a tensile strength of over 400MPa), and the elastic element (rubber) provides buffering and shock absorption performance. The combination of the two can simultaneously meet the requirements of high strength and impact resistance. The vulcanization technology is relatively mature and easy to produce and process. Attached Figure Description

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

[0015] Figure 2 This is a partial cross-sectional view of one embodiment of the present invention.

[0016] Figure 3 This is a three-dimensional schematic diagram of a bracket according to an embodiment of the present invention.

[0017] Figure 4 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. A constant velocity universal joint drive shaft assembly with a flexible noise reduction bracket includes an intermediate shaft 1. One end of the intermediate shaft is connected to a first universal joint 2, and the other end is provided with a second universal joint 3. The first universal joint includes a housing 21, a connecting shaft 22 on the housing, a bearing 23 on the connecting shaft, and a bracket. The bracket includes an outer shell 41 and an inner shell 42, which are connected by an elastic element 43. The inner wall of the inner shell contacts the outer wall of the bearing, and the outer shell is provided with a mounting part 411 for connection with a motor housing. The elastic element can be disposed between the outer shell and the inner shell, or it can be fixed to the outer shell and the inner shell by vulcanization. The mounting part can be a mounting hole provided on the outer shell, and the outer shell can be fixedly connected by screws. This facilitates the installation of the constant velocity universal joint on the moving end and is suitable for complex working conditions of the whole vehicle. It not only ensures the stability of the drive shaft installation but also plays a good self-buffering role, effectively improving vehicle vibration and noise and improving vehicle comfort. The mounting part and the motor housing are existing technologies. The background technology can be referred to, that is, the mounting hole and the threaded hole of the motor flange of the vehicle chassis are connected by bolts to fix the bracket to the motor housing.

[0019] In this embodiment, as shown in the figure, the mounting part is a mounting hole.

[0020] In this embodiment, as shown in the figure, the elastic element is rubber.

[0021] In this embodiment, as shown in the figure, the outer shell, elastic element, and inner shell are connected together by vulcanization.

[0022] In this embodiment, as shown in the figure, the inner shell includes a top plate 422 and a side plate 423. The top plate is located on the circumferential outer side of the bearing, and the side plate is located on the axial outer side of the bearing. Vulcanization technology is relatively mature and easy to produce and process.

[0023] In this embodiment, as shown in the figure, the connecting shaft is provided with an annular groove 224, and part of the side plate extends into the annular groove. This serves as a limiting mechanism, and the other side of the bearing is limited to the outer wall of the housing.

[0024] In this embodiment, as shown in the figure, the outer shell and inner shell are made of alloy steel. Specifically, ST20 or similar materials can be used.

[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 constant velocity universal joint drive shaft assembly with a flexible noise reduction bracket, 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 (3), the first universal joint comprising a housing (21), a connecting shaft (22) provided on the housing, and a bearing (23) provided on the connecting shaft, characterized in that: Also includes The bracket includes an outer shell (41) and an inner shell (42), the outer shell and the inner shell are connected by an elastic element (43); the inner wall of the inner shell contacts the outer wall of the bearing, and the outer shell is provided with a mounting part (411) for connecting with the motor housing.

2. The constant velocity universal joint drive shaft assembly with flexible noise reduction bracket according to claim 1, characterized in that: The mounting part is a mounting hole.

3. The constant velocity universal joint drive shaft assembly with flexible noise reduction bracket according to claim 1, characterized in that: The elastic element is made of rubber.

4. The constant velocity universal joint drive shaft assembly with flexible noise reduction bracket according to claim 1, characterized in that: The outer shell, elastic element, and inner shell are joined together by vulcanization.

5. A constant velocity universal joint drive shaft assembly with a flexible noise reduction bracket according to claim 1, characterized in that: The inner shell includes a top plate (422) and a side plate (423), the top plate being located on the circumferential outer side of the bearing and the side plate being located on the axial outer side of the bearing.

6. A constant velocity universal joint drive shaft assembly with a flexible noise reduction bracket according to claim 5, characterized in that: The connecting shaft is provided with an annular groove (224), and part of the side plate extends into the annular groove.

7. A constant velocity universal joint drive shaft assembly with a flexible noise reduction bracket according to any one of claims 1-6, characterized in that: The outer and inner shells are made of alloy steel.

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