Lightweight constant velocity joint star sleeve

Abstract

The utility model discloses a kind of lightweight constant velocity universal joint star-shaped sleeve, including star-shaped sleeve main body, eight outer raceways are equidistantly arranged on the circumference of star-shaped sleeve main body, and the position between center hole and adjacent two outer raceways on star-shaped sleeve main body is provided with the weight-reducing through hole parallel to axis;Outer raceway is close to center position and is provided with multiple axial shallow grooves along outer raceway direction.The utility model can not only reduce the weight of star-shaped sleeve main body by increasing the number of outer raceway, but also improve steering and power transmission accuracy by increasing the number of matching steel ball, star-shaped sleeve is mainly circumferentially stressed, and the axial weight-reducing through hole is arranged on star-shaped sleeve main body, axial shallow groove and flow guide groove are arranged in outer raceway, and weight-reducing axial groove and weight-reducing circumferential groove are arranged on circumference, which will not affect normal stress and structural strength when star-shaped sleeve main body works, to achieve the purpose of lightweight design.

Description

Technical Field

[0001] This utility model relates to the field of star-shaped sleeve technology, specifically a lightweight constant velocity universal joint star-shaped sleeve. Background Technology

[0002] The star-shaped sleeve is a core component of the automotive ball cage constant velocity universal joint. Its central hole has a spline groove on the inner wall, which is tightly connected to the drive shaft to ensure stable power transmission. The outer surface has six outer raceways. After installing the steel balls and cage, the spherical shell fits to form a complete universal joint. The steel balls roll in the outer raceways, transmitting power from the drive shaft to the spherical shell, realizing power transmission during steering.

[0003] In the process of automotive R&D, lightweight design has always been a pursued direction, whether for the whole vehicle or parts. The existing constant velocity universal joint star sleeves are all solid structures with six outer raceways. The overall blank usage is large and the weight is sufficient, which is an important direction for lightweight design. Therefore, based on the existing solid star sleeve structure, a lightweight constant velocity universal joint star sleeve is designed and proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a lightweight constant velocity universal joint star sleeve, which aims to achieve lightweight design based on the existing solid star sleeve structure.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A lightweight constant velocity universal joint star sleeve includes a star sleeve body, a central hole is provided on the central axis of the star sleeve body, a spline groove is provided on the inner wall of the central hole, eight outer raceways are equidistantly arranged on the circumference of the star sleeve body, and a weight-reducing through hole parallel to the axis is provided on the star sleeve body at a position between the central hole and two adjacent outer raceways.

[0007] The outer raceway is provided with multiple axial shallow grooves along the direction of the outer raceway near the center position, and the outer raceway is provided with a guide groove that is perpendicular to the axial shallow grooves and arranged along the arc of the inner wall of the outer raceway near the edge position.

[0008] The star-shaped sleeve body is provided with a weight-reducing axial groove and a weight-reducing circumferential groove on the circumference outside the outer raceway, and the weight-reducing axial groove and the weight-reducing circumferential groove are connected.

[0009] Preferably, the weight-reducing through hole is a through hole with a gradually changing diameter, where the end diameter is larger than the center diameter and the holes are symmetrical front and back.

[0010] Preferably, the axial shallow groove is a long groove with a narrow opening.

[0011] Preferably, the guide channel is an arc-shaped channel with a narrow opening, and the guide channel is connected to the weight reduction circumferential channel.

[0012] Preferably, the flow guide groove and the weight reduction axial groove are both equidistantly arranged along the axial direction of the star-shaped sleeve body.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention, by increasing the number of outer raceways, not only reduces the weight of the star-shaped sleeve body but also improves steering and power transmission accuracy by increasing the number of matching steel balls. Since the star-shaped sleeve is primarily subjected to circumferential force, setting axial weight-reducing through holes on the star-shaped sleeve body, axial shallow grooves and guide grooves inside the outer raceways, and weight-reducing axial and circumferential grooves on the circumference will not affect the normal stress and structural strength of the star-shaped sleeve body during operation. Furthermore, by setting weight-reducing through holes, axial shallow grooves, guide grooves, axial and circumferential grooves, the lubricating oil flow effect is increased, thereby improving lubrication. This not only achieves the goal of lightweight design but also reduces wear and extends service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a side view of the present invention;

[0017] Figure 3 This is a cross-sectional view of the present invention;

[0018] Figure 4 This is a side view of the weight-reducing through hole of this utility model;

[0019] Figure 5 The front view of the existing star-shaped case.

[0020] In the figure: 1. Star-shaped sleeve body; 2. Center hole; 3. Spline groove; 4. Outer raceway; 5. Weight reduction through hole; 6. Axial shallow groove; 7. Guide groove; 8. Weight reduction axial groove; 9. Weight reduction circumferential groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1-4As shown, this utility model provides a technical solution: a lightweight constant velocity universal joint star sleeve, including a star sleeve body 1, a central hole 2 is provided on the central axis of the star sleeve body 1, a spline groove 3 is provided on the inner wall of the central hole 2, eight outer raceways 4 are equidistantly arranged on the circumference of the star sleeve body 1, and a weight reduction through hole 5 parallel to the axis is provided on the star sleeve body 1 at the position between the central hole 2 and two adjacent outer raceways 4. The weight reduction through hole 5 is a through hole with a gradually changing diameter, where the end diameter is larger than the center diameter and the front and back are symmetrical.

[0023] The outer raceway 4 is provided with multiple axial shallow grooves 6 along the direction of the outer raceway 4 near the center position. The axial shallow grooves 6 are long grooves with narrow openings. The outer raceway 4 is provided with a guide groove 7 that is perpendicular to the axial shallow grooves 6 and is arranged along the arc of the inner wall of the outer raceway 4 near the edge position. The guide groove 7 is an arc-shaped groove with a narrow opening.

[0024] The star-shaped sleeve body 1 is provided with a weight-reducing axial groove 8 and a weight-reducing circumferential groove 9 on the circumference outside the outer raceway 4. The flow guide groove 7 is connected to the weight-reducing circumferential groove 9. The flow guide groove 7 and the weight-reducing axial groove 8 are equidistant along the axial direction of the star-shaped sleeve body 1. The weight-reducing axial groove 8 is connected to the weight-reducing circumferential groove 9.

[0025] Working principle:

[0026] By increasing the number of outer raceways 4, not only can the weight of the star-shaped sleeve body 1 be reduced, but the steering and power transmission accuracy can also be improved by increasing the number of matching steel balls. The star-shaped sleeve is mainly subjected to force along the circumferential direction. Therefore, setting axial weight-reducing through holes 5 on the star-shaped sleeve body 1, setting axial shallow grooves 6 and guide grooves 7 inside the outer raceways 4, and setting weight-reducing axial grooves 8 and weight-reducing circumferential grooves 9 on the circumference will not affect the normal force and structural strength of the star-shaped sleeve body 1 during operation. Furthermore, by setting weight-reducing through holes 5, axial shallow grooves 6, guide grooves 7, weight-reducing axial grooves 8, and weight-reducing circumferential grooves 9, the lubricating oil flow effect can be increased to improve the lubrication effect. This not only achieves the purpose of lightweight design, but also reduces wear and extends service life.

[0027] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightweight constant velocity universal joint star sleeve, comprising a star sleeve body (1), wherein a central hole (2) is provided on the central axis of the star sleeve body (1), and a spline groove (3) is provided on the inner wall of the central hole (2), characterized in that: The star-shaped sleeve body (1) has eight outer raceways (4) equidistantly arranged on its circumference. The star-shaped sleeve body (1) has a weight-reducing through hole (5) parallel to the axis located between the central hole (2) and two adjacent outer raceways (4). The outer raceway (4) is provided with multiple axial shallow grooves (6) along the direction of the outer raceway (4) near the center position, and a guide groove (7) is provided in the outer raceway (4) near the edge position, which is perpendicular to the axial shallow grooves (6) and along the arc of the inner wall of the outer raceway (4). The star-shaped sleeve body (1) is provided with a weight-reducing axial groove (8) and a weight-reducing circumferential groove (9) on the circumference outside the outer raceway (4), and the weight-reducing axial groove (8) and the weight-reducing circumferential groove (9) are connected.

2. The lightweight constant velocity universal joint star sleeve according to claim 1, characterized in that: The weight-reducing through hole (5) is a through hole with a gradually changing diameter, where the end diameter is larger than the center diameter and the holes are symmetrical front and back.

3. A lightweight constant velocity universal joint star sleeve according to claim 1, characterized in that: The axial shallow groove (6) is a long groove with a narrow opening.

4. A lightweight constant velocity universal joint star sleeve according to claim 1, characterized in that: The guide channel (7) is an arc-shaped channel with a narrow opening, and the guide channel (7) is connected to the weight reduction circumferential channel (9).

5. A lightweight constant velocity universal joint star sleeve according to claim 1, characterized in that: The flow guide groove (7) and the weight reduction axial groove (8) are both equidistantly arranged along the axial direction of the star-shaped sleeve body (1).

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