Spline self-locking structure of nut and hub unit

Abstract

The utility model discloses a nut and hub unit spline self-locking structure. The driving shaft assembly mainly solves the problem that in a transmission structure of a conventional driving shaft assembly, a fixed joint conducts transmission through a spline on a half shaft, and the bearing capacity is not high. The mounting structure is characterized by further comprising a mounting hole (211) formed in the axial outer wall of the shell and a second mounting hole (411) formed in the flange plate and connected with the mounting hole through a fastener; one end of the elastic piece (24) abuts against the axial outer wall of the shell, and the other end of the elastic piece (24) abuts against the axial wall of the flange plate. According to the nut and hub unit spline self-locking structure, a traditional fixed end outer ball cage rod spline is omitted, a mounting hole is formed in the datum plane of an outer ball cage, an elastic piece is additionally arranged in an inner hole of the datum plane, and after the outer ball cage and a hub unit are assembled, under the action of the elastic piece, the ball cage plays a role in impact resistance and shock absorption; the usability of the driving shaft is effectively protected, the fracture risk of the shaft rod is reduced, and the bearing capacity is higher.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts, and particularly relates to a self-locking structure of a nut and a hub unit spline. Background Art

[0002] The outer constant velocity joint and the hub unit are locked and cooperated under a locking force of 300 N.M. As the vehicle continues to travel and vibrate, the nut will become loose, resulting in abnormal noise in the transmission system. Therefore, the anti-loosening of the nut is extremely important, and the anti-loosening is for more effective long-term operation. The traditional nut is mechanically anti-loosened by using a split pin to be deformed and buckled on the constant velocity joint shaft after the outer constant velocity joint and the hub unit are locked. Such a structure is relatively troublesome and requires additional parts. Content of the Utility Model

[0003] In order to overcome the deficiencies of the background art, the utility model provides a self-locking structure of a nut and a hub unit spline, mainly solving the problem that the nut anti-loosening structure of the hub bearing unit requires additional parts.

[0004] The technical solution of the utility model is as follows.

[0005] A self-locking structure of a nut and a hub unit spline includes a flange and an outer ring. The flange includes a journal. A cage is arranged between the journal and the outer ring. Rolling elements are arranged on the cage and are matched with the inner wall of the outer ring. It further includes

[0006] A transmission groove is arranged axially on the journal. A key groove for cooperating with the outer wall of the bell housing is arranged on the inner wall of the transmission groove.

[0007] A nut is used for being threadedly connected with the bell housing and is provided with a retaining piece for extending into the key groove. The retaining piece is used to prevent the nut from reversing and coming off.

[0008] The nut includes a top cover. An installation groove for installing the top cover is arranged in the flange.

[0009] A connecting pipe is arranged on the top cover. A threaded portion for being threadedly connected with the bell housing is arranged on the inner wall of the connecting pipe.

[0010] The retaining piece is arranged on the axial outer wall of the connecting pipe.

[0011] The retaining piece includes an arc-shaped connecting section and an insertion section for inserting into the key groove. The connecting section is connected with the connecting pipe. The insertion section can be deformed in the rotation direction when the nut is installed.

[0012] The rolling element is a steel ball.

[0013] Two retaining pieces are arranged.

[0014] The beneficial effects of the present utility model are as follows: The present utility model provides a self-locking structure for the spline of a nut and a hub unit. When the nut is tightened and the anti-rotation piece is stuck into the spline groove of the hub bearing unit, it will be fixed there, playing a role in preventing loosening, and the structure is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic cross-sectional view of an embodiment of the present utility model installed together with a bell housing.

[0016] Figure 2 It is a schematic side view of an embodiment of the present utility model.

[0017] Figure 3 It is a schematic view of a nut of an embodiment of the present utility model.

[0018] Figure 4 It is a schematic cross-sectional view of a nut of an embodiment of the present utility model.

[0019] Figure 5 It is a schematic view of a bell housing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described below with reference to the drawings: As shown in the figure, a self-locking structure for the spline of a nut and a hub unit includes a flange 1 and an outer ring 2. The flange includes a journal 3. A cage 4 is provided between the journal and the outer ring. Rolling elements 41 are provided on the cage and are adapted to the inner wall of the outer ring. It further includes a transmission groove 31 provided axially on the journal. A keyway 311 for cooperating with the outer wall of the bell housing 91 is provided on the inner wall of the transmission groove. A nut 5 is used for threadedly connecting with the bell housing and is provided with an anti-rotation piece 6 for extending into the keyway. The anti-rotation piece is used to prevent the nut from reversing and coming off. The anti-rotation piece is directly provided on the nut, without the need for additional components, which is more convenient for installation and has a better anti-loosening effect. It is a permanent anti-loosening structure. The bell housing is provided with a screw 93 for connecting with the nut. After the nut is installed, its top cover contacts the bottom inner wall of the installation groove to form a fixation. The bell housing is provided with a spline 94 for cooperating with the transmission groove, which is prior art.

[0021] In this embodiment, as shown in the figure, the nut includes a top cover 52, and an installation groove 11 for the top cover to be inserted is provided inside the flange.

[0022] In this embodiment, as shown in the figure, a connecting pipe 53 is provided on the top cover, and a threaded portion for threadedly connecting with the bell housing is provided on the inner wall of the connecting pipe. The screw extends into the connecting pipe and is threadedly connected to form a fixation, which is more convenient for installation. The top cover can also be provided with a threaded portion for connecting with the screw.

[0023] In this embodiment, as shown in the figure, the stopper is arranged on the axial outer wall of the connecting pipe. The top of the connecting pipe is provided with the stopper, and the stopper can be made of metal.

[0024] In this embodiment, as shown in the figure, the stopper includes an arc-shaped connecting section 61 and an inserting section 62 for inserting into the keyway, the connecting section is connected to the connecting pipe, and the inserting section can be deformed in the rotation direction of the nut. Figure 2 The figure shows a counterclockwise rotation, and there is space on the inside of the insertion section for deformation, but when it is reversed, there is no space for deformation and it will get stuck to prevent it from falling out.

[0025] In this embodiment, as shown in the figure, the rolling element is a steel ball.

[0026] In this embodiment, as shown in the figure, two stopper plates are provided, which has a better effect.

[0027] 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.

[0028] 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.

[0029] 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 nut and hub unit spline self-locking structure, comprising a flange (1) and an outer ring (2), the flange comprising a journal (3), a retaining frame (4) being provided between the journal and the outer ring, the retaining frame being provided with a rolling element (41) cooperating with an inner wall of the outer ring, characterized in that: Also includes A transmission groove (31) is arranged in the axial direction of the shaft journal, and the inner wall of the transmission groove is provided with a key groove (311) for matching with the outer wall of the bell housing (91). The nut (5) is used for being threadedly connected to the bell housing and is provided with a stop plate (6) for extending into the keyway, wherein the stop plate is used to prevent the nut from being reversed and falling out.

2. A nut and hub unit spline self-locking structure according to claim 1, characterized in that: The nut comprises a top cover (52), and a mounting groove (11) for mounting the top cover is provided in the flange.

3. The nut and hub unit spline self-locking structure according to claim 1, characterized in that: The top cover is provided with a connecting pipe (53), and the inner wall of the connecting pipe is provided with a threaded portion for threaded connection with the bell housing.

4. The nut and hub unit spline self-locking structure according to claim 1, characterized in that: The retaining plate is arranged on the axial outer wall of the connecting pipe.

5. The nut and hub unit spline self-locking structure according to claim 1, characterized in that: The retaining plate comprises an arc-shaped connecting section (61) and an inserting section (62) for inserting into the keyway, the connecting section being connected to the connecting pipe, and the inserting section being deformable in the rotation direction of the nut when installed.

6. The nut and hub unit spline self-locking structure according to claim 1, characterized in that: The rolling element is a steel ball.

7. The nut and hub unit spline self-locking structure according to claim 1, characterized in that: The anti-retraction pieces are provided with two.

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