Double-section sliding type compact universal joint

Abstract

The utility model discloses a double-section sliding type compact universal joint. The universal joint mainly solves the problems that only a retainer of an existing conventional universal joint can slide relative to a shell, and the overall sliding amount is small. The retainer is axially and movably arranged in the shell, a plurality of pockets are formed in the circumferential direction of the retainer, rolling pieces are arranged in the pockets, and the rolling pieces make contact with the inner wall of the shell; the starlike sleeve is arranged in the retainer and can move in the axial direction relative to the retainer; a roller path matched with the rolling ball is arranged on the starlike sleeve, and a mounting groove connected with a transmission shaft is axially formed in the starlike sleeve; and at least part of the check ring is arranged in the retainer and used for limiting the stroke of the starlike sleeve and / or the transmission shaft in the axial direction. The utility model provides a double-section sliding type compact universal joint which can achieve a larger sliding range, meet transmission requirements under different vehicle conditions, have high adaptability and flexibility and provide a better and more concise design scheme for different structures of vehicles.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts, in particular to a double-section sliding compact universal joint. Background Art

[0002] In the automobile transmission system, the universal joint is a very important component. Under complex road conditions, the sliding universal joint can effectively compensate for bumps on the road, help maintain the stability of the vehicle, reduce the risk of loss of control due to poor ground conditions, increase the traction and grip of the vehicle under various road conditions, and improve the off-road performance of the vehicle.

[0003] In a conventional universal joint, only the retaining frame can slide relative to the housing, and the overall slippage is small. Utility Model Content

[0004] In order to overcome the shortcomings of the background technology, the utility model provides a double-stage sliding compact universal joint, which mainly solves the problem that only the retaining frame of the current conventional universal joint can slide relative to the shell and the overall sliding amount is small.

[0005] The technical solution of the utility model is:

[0006] A double-segment sliding compact universal joint, comprising a housing and

[0007] A retainer is axially movable in the housing and is provided with a plurality of pockets in the circumferential direction. Rolling elements are provided in the pockets, and the rolling elements are in contact with the inner wall of the housing;

[0008] The star-shaped sleeve is arranged in the retaining frame and can be displaced in the axial direction relative to the retaining frame; the star-shaped sleeve is provided with a raceway matched with the rolling element, and is axially provided with a mounting groove for connecting with the transmission shaft;

[0009] The retaining ring is at least partially arranged in the retaining frame and is used to limit the travel of the star sleeve and / or the transmission shaft in the axial direction.

[0010] The star-shaped sleeve comprises ridges, raceways are formed between the ridges, and there is a hollow groove between the circumferential outer wall of the ridges and the inner wall of the retaining frame.

[0011] The inner wall of the installation groove is provided with a transmission key for matching with the transmission shaft.

[0012] The rolling element is a steel ball.

[0013] The housing is axially provided with a second slot for accommodating the retainer, and also includes a sleeve connected to the circumferential outer wall of the housing, and the sleeve is provided with a baffle partially arranged on one side of the second slot for preventing the retainer from falling out.

[0014] The sleeve is crimped together with the outer wall of the housing.

[0015] The retaining ring is snap-fitted with the inner wall of the retaining frame.

[0016] The beneficial effects of the utility model are as follows: the utility model provides a double-stage sliding compact universal joint, which can achieve a larger sliding range, meet the transmission requirements under different vehicle conditions, have strong adaptability and flexibility, and provide a better and simpler design solution for different vehicle structures. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the utility model (after sliding).

[0019] Figure 3 It is a cross-sectional schematic diagram of an embodiment of the utility model (after sliding).

[0020] Figure 4 It is a schematic diagram of a retainer and a star sleeve in the prior art.

[0021] Figure 5 This is a partial explosion diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings: as shown in the figure, a two-stage sliding compact universal joint includes a shell 1 and a retaining frame 2, which is axially movably arranged in the shell and has a plurality of pockets circumferentially provided. Rolling elements 21 are provided in the pockets, and the rolling elements are in contact with the inner wall of the shell; a star sleeve 3 is provided in the retaining frame and can be displaced axially relative to the retaining frame; a raceway 31 matching the rolling element is provided on the star sleeve, and a mounting groove 32 for connecting to a transmission shaft 91 is axially provided; a retaining ring 4 is at least partially provided in the retaining frame, and is used to limit the axial stroke of the star sleeve and / or the transmission shaft.

[0023] First of all, the retaining frame can slide axially in the shell through the rolling cooperation of the ball. Conventional universal joints also have this function. The difference in this application is that the star sleeve can also perform relatively maintained axial movement in the retaining frame, so that the sliding of the retaining frame can be superimposed to increase the overall slippage. During installation, the drive shaft is installed together with the star sleeve through the retaining ring, and the star sleeve is driven by the drive shaft to move. The retaining ring is used to limit the movement of the right side of the drive shaft (a convex ring is provided on the drive shaft), and can also limit the star sleeve when the left side of the drive shaft moves.

[0024] In this embodiment, as shown in the figure, the star sleeve includes ridges 33, raceways are formed between the ridges, and there is a slot 34 between the circumferential outer wall of the ridge and the inner wall of the retainer. Further, the outer surface of the ridge is a plane, and with reference to Figure 5 There will be no inner wall of the cage to block the moving trajectory of the star sleeve and its extension line, which is more conducive to sliding.

[0025] In this embodiment, as shown in the figure, the inner wall of the installation groove is provided with a transmission key for matching with the transmission shaft. It can be a spline, etc. The transmission shaft can be installed in the installation groove by a retaining spring, etc. This is similar to the prior art and will not be repeated.

[0026] In this embodiment, as shown in the figure, the rolling element is a steel ball, which has a simple structure and is easy to install.

[0027] In this embodiment, as shown in the figure, the housing is axially provided with a second slot 11 for accommodating the retainer, and further includes a sleeve 5 connected to the circumferential outer wall of the housing, and the sleeve is provided with a baffle 51 partially provided on one side of the second slot for preventing the retainer from coming out. The sleeve can have an interference fit with the outer wall of the housing, and its baffle can play a role of limiting, preventing the retainer from excessive displacement, and making it safer to use.

[0028] In this embodiment, as shown in the figure, the sleeve is crimped together with the outer wall of the shell.

[0029] In this embodiment, as shown in the figure, the retaining ring is engaged with the inner wall of the retaining frame and can be installed by knocking to achieve displacement control. Of course, the retaining ring can also be installed by threaded connection or the like.

[0030] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] The embodiments described with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention. The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A two-stage sliding compact universal joint, comprising a housing (1), characterized in that: Also includes A retaining frame (2) is axially movable and arranged in the housing, and is provided with a plurality of pockets in the circumferential direction. Rolling members (21) are arranged in the pockets, and the rolling members are in contact with the inner wall of the housing; A star-shaped sleeve (3) is disposed in the retaining frame and is displaceable in the axial direction relative to the retaining frame; the star-shaped sleeve is provided with a raceway (31) matching the rolling element, and is axially provided with a mounting groove (32) for connecting to a transmission shaft (91); The retaining ring (4) is at least partially disposed in the retaining frame and is used to limit the travel of the star sleeve and / or the transmission shaft in the axial direction.

2. The double-segment sliding compact universal joint according to claim 1, characterized in that: The star-shaped sleeve comprises ridges (33), the raceways are formed between the ridges, and there is a hollow groove (34) between the circumferential outer wall of the ridges and the inner wall of the retaining frame.

3. The double-segment sliding compact universal joint according to claim 1, characterized in that: The inner wall of the installation groove is provided with a transmission key for matching with the transmission shaft.

4. The double-segment sliding compact universal joint according to claim 1, characterized in that: The rolling element is a steel ball.

5. A double-segment sliding compact universal joint according to any one of claims 1 to 4, characterized in that: The housing is axially provided with a second slot (11) for accommodating the retaining frame, and further comprises a sleeve (5) connected to the circumferential outer wall of the housing, the sleeve being provided with a baffle (51) partially provided on one side of the second slot for preventing the retaining frame from falling out.

6. The double-segment sliding compact universal joint according to claim 5, characterized in that: The sleeve is crimped together with the outer wall of the housing.

7. The double-segment sliding compact universal joint according to claim 6, characterized in that: The retaining ring is snap-fitted with the inner wall of the retaining frame.

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