Transmission shaft assembly easy to machine and small in gap

Abstract

The utility model discloses a transmission shaft assembly easy to machine and small in gap. The problem that splines of an existing transmission shaft assembly are difficult to match is mainly solved. The intermediate shaft is characterized by comprising a first straight groove (11) arranged on the circumferential outer wall of the intermediate shaft; the star-shaped sleeve (4) is arranged between the retainer and the intermediate shaft, and a second straight groove (41) is formed in the star-shaped sleeve; a part of the transmission block (5) is arranged in the first straight groove, a part of the transmission block (5) is arranged in the second straight groove, and the fastener (6) is used for installing the starlike sleeve and the intermediate shaft together. The transmission shaft assembly is easy to machine and small in gap, traditional spline fit is omitted, connection is achieved through close fit of the shaft and the hole, the cold rolling procedure can be omitted in the machining process of the product, and the machining efficiency of the product is improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts, and particularly relates to a drive shaft assembly which is easy to process and has a small clearance. Background Art

[0002] In modern mechanical drive systems, the drive shaft assembly plays a crucial role. However, traditional drive shaft assemblies often have problems such as complex processes and high costs during processing. At the same time, during use, due to the large clearance between the shaft body and other components, it is easy to cause adverse phenomena such as reduced transmission efficiency, increased noise, and intensified vibration.

[0003] There are disadvantages in the manufacture of existing rotating shaft assemblies: the spline fit is not good: when fitting the splines, it is necessary to divide the star sleeve into grades and then match the half shaft, which affects production efficiency. At the same time, there are also phenomena of being too tight or too loose. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the background art, the utility model provides a drive shaft assembly which is easy to process and has a small clearance, mainly solving the problem that the splines of the existing drive shaft assembly are difficult to fit.

[0005] The technical solution of the utility model is as follows.

[0006] A drive shaft assembly which is easy to process and has a small clearance includes an intermediate shaft. One end of the intermediate shaft is provided with a first universal joint, and the other end is provided with a second universal joint. The first universal joint includes a housing, a cage is arranged in the housing, rolling elements are arranged on the cage, and it also includes

[0007] A first straight groove is arranged on the outer circumferential wall of the intermediate shaft;

[0008] A star sleeve is arranged between the cage and the intermediate shaft, and a second straight groove is arranged on the star sleeve;

[0009] A transmission block is partially arranged in the first straight groove and partially arranged in the second straight groove.

[0010] Fasteners are used to install the star sleeve and the intermediate shaft together.

[0011] The planetary sleeve is axially provided with a through groove for the intermediate shaft to be inserted, and circumferentially provided with a threaded groove communicating with the through groove, and the threaded groove is used for installing the fasteners.

[0012] An installation groove is arranged on the intermediate shaft opposite to the threaded groove.

[0013] A retaining ring is arranged on the intermediate shaft, and the retaining ring is arranged outside the transmission block to prevent the transmission block from coming out.

[0014] The rolling elements are steel balls.

[0015] The fastener is a bolt.

[0016] The beneficial effects of the present utility model are as follows: The present utility model provides a drive shaft assembly that is easy to process and has a small gap. This product eliminates the traditional spline fit and is connected through the tight fit of the shaft and the hole. The cold rolling process can be eliminated during the processing of the product, improving the processing efficiency of the product. Description of the Drawings

[0017] Figure 1 It is a cross-sectional schematic view of an embodiment of the present utility model.

[0018] Figure 2 It is a schematic view of the star-shaped sleeve of an embodiment of the present utility model.

[0019] Figure 3 It is a cross-sectional view of the star-shaped sleeve of an embodiment of the present utility model.

[0020] Figure 4 It is a schematic view of the intermediate shaft of an embodiment of the present utility model.

[0021] Figure 5 is Figure 4 a cross-sectional schematic view at the E-E position in Detailed Embodiment

[0022] The present utility model will be further described below with reference to the drawings: As shown in the figure, a drive shaft assembly that is easy to process and has a small gap includes an intermediate shaft 1. One end of the intermediate shaft is provided with 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 cage 22 is arranged inside the housing, rolling elements 23 are arranged on the cage, and further includes a first straight groove 11 arranged on the circumferential outer wall of the intermediate shaft; a star-shaped sleeve 4 arranged between the cage and the intermediate shaft, and a second straight groove 41 is arranged on the star-shaped sleeve; a transmission block 5, part of which is arranged in the first straight groove and part of which is arranged in the second straight groove, and a fastener 6 for installing the star-shaped sleeve and the intermediate shaft together.

[0023] The characteristics of this application are no splines: This product eliminates the traditional spline fit and is connected through the tight fit of the shaft and the hole;. Small axial gap: Axial gaps may be large due to dimensional tolerances of the product, and there may be problems such as loud noise and increased vibration after installation in the vehicle. This design can greatly reduce the axial gap of the product; Small circumferential gap: This design eliminates the spline engagement drive at one end of the intermediate shaft, reducing the large circumferential gap of the product caused by processing errors and greatly improving the product quality; Improve the processing efficiency of the product: The cold rolling process can be eliminated during the processing of the product, improving the processing efficiency of the product; The transmission of torque is achieved through a detachable transmission block, so that the intermediate shaft is easy to process, and the transmission block can be a cuboid structure to achieve the transmission of torque.

[0024] In this embodiment, as shown in the figure, a through groove 42 for installing the intermediate shaft is axially provided on the planetary sleeve, and a threaded groove 43 communicating with the through groove is circumferentially provided. The threaded groove is used for installing the fastener. The fastener can be a bolt, which is threadedly connected to the threaded groove and extends into the installation groove of the intermediate shaft to transmit torque.

[0025] In this embodiment, as shown in the figure, an installation groove 12 opposite to the threaded groove is provided on the intermediate shaft.

[0026] In this embodiment, as shown in the figure, a retaining ring 7 is provided on the intermediate shaft. The retaining ring is arranged outside the transmission block to prevent the transmission block from disengaging. It is an elastic retaining ring for preventing the transmission block from disengaging in the axial direction of the transmission rod.

[0027] In this embodiment, as shown in the figure, the rolling element is a steel ball.

[0028] In this embodiment, as shown in the figure, the fastener is a bolt.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0031] The embodiments described with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention. The embodiments should not be regarded as a limitation to the present invention, but any improvement 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 that is easy to process and has a small clearance, comprising an intermediate shaft (1), with a first universal joint (2) provided at one end of the intermediate shaft and a second universal joint (3) provided at the other end. The first universal joint includes a housing (21), a cage (22) is provided inside the housing, and rolling elements (23) are provided on the cage. It is characterized in that: It further includes a first straight groove (11) provided on the outer circumferential wall of the intermediate shaft; a star-shaped sleeve (4) provided between the cage and the intermediate shaft, and a second straight groove (41) is provided on the star-shaped sleeve; a transmission block (5) partly arranged in the first straight groove and partly arranged in the second straight groove, a fastener (6) for mounting the star-shaped sleeve and the intermediate shaft together.

2. The drive shaft assembly that is easy to process and has a small clearance according to claim 1, wherein: The planetary sleeve is axially provided with a through groove (42) for the intermediate shaft to be inserted, and circumferentially provided with a threaded groove (43) communicating with the through groove, and the threaded groove is used for the installation of the fastener.

3. The drive shaft assembly that is easy to process and has a small gap according to claim 2, wherein: An installation groove (12) opposite to the threaded groove is provided on the intermediate shaft.

4. The drive shaft assembly that is easy to process and has a small clearance according to claim 3, wherein: A retaining ring (7) is provided on the intermediate shaft, and the retaining ring is arranged outside the transmission block to prevent the transmission block from coming out.

5. The drive shaft assembly that is easy to process and has a small clearance according to claim 4, characterized in that: The rolling element is a steel ball.

6. A drive shaft assembly that is easy to process and has a small gap according to claim 5, characterized in that: The fastener is a bolt.

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