A novel constant velocity universal joint cage

Abstract

This utility model discloses a novel constant velocity universal joint retainer, comprising a retainer body. Eight circular windows, penetrating both internally and externally, are equidistantly arranged on the circumference of the retainer body. Wavy protrusions are equidistantly arranged on the inner wall of each circular window, and a grid-like reinforcing rib is uniformly arranged on the outer wall of the retainer body. This utility model utilizes circular windows, whose shape differs from rectangular or rounded rectangular windows, to reduce stress concentration during use. The wavy protrusions within the circular windows increase contact with the mounting steel balls, preventing localized stress. Increasing the number of circular windows distributes the stress across each window location. Furthermore, the retainer body employs a design with increased wall thickness in the middle and additional grid-like reinforcing ribs on the outside, increasing overall structural strength. This achieves stress dispersion and improved structural strength, reducing the probability of damage and extending service life.

Description

Technical Field

[0001] This utility model relates to the field of cage technology, specifically a novel constant velocity universal joint cage. Background Technology

[0002] The constant velocity joint (CV joint) cage is an important component of automotive CV joints, primarily used to limit the movement range of the steel balls, ensuring the stability and constant velocity of power transmission. The cage is typically a cylindrical structure, with the inner and outer spherical surfaces using clearance fits with the star-shaped sleeve and bell-shaped shell, respectively, ensuring stable movement of the steel balls within the raceways between the inner and outer cages. The manufacturing process includes blanking, forming, precision machining of the inner and outer spherical surfaces and base surface, stamping of openings, milling of the opening planes, carburizing heat treatment, hard turning, and hard milling.

[0003] Most existing cages have 6 openings, which are generally rectangular or rounded rectangular. The plane of the opening and the steel ball are also clearance fit. The structural dimensions of the cage are limited by the internal cavity space, and the wall thickness is relatively thin, generally 4.0-8.0 mm, but it needs to have sufficient strength and wear resistance.

[0004] Since most existing cage windows are rectangular holes, these windows are susceptible to uneven stress conditions, and stress tends to concentrate at their edges. In addition, due to their thin walls, they are one of the more easily damaged parts in automotive ball cage constant velocity universal joints. Therefore, it is particularly important to improve their structural strength. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a novel constant velocity universal joint retainer, which solves the problem that existing retainers are prone to damage due to their thin walls and internal stress concentration.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A novel constant velocity universal joint retainer includes a retainer body. Eight circular windows are equidistantly arranged on the circumference of the retainer body, penetrating both the inner and outer sides. Wavy protrusions are equidistantly arranged on the inner wall of the circular windows. A grid-like reinforcing rib is uniformly arranged on the outer wall of the retainer body.

[0008] Preferably, the wavy protrusion and the cage body are an integral structure.

[0009] Preferably, the radial thickness of the wavy protrusion along the cage body is less than the radial thickness of the cage body at the corresponding position.

[0010] Preferably, the wall thickness at the center of the cage body is greater than the wall thickness at the edge.

[0011] Preferably, a blank area without mesh-like reinforcing ribs is reserved around the circular window opening and at the edge of the cage body.

[0012] Preferably, the mesh-like reinforcing ribs include warp ribs and weft ribs, and both the warp ribs and weft ribs are integral with the cage body.

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

[0014] This invention features circular windows, which differ in shape from rectangular or rounded rectangular windows, making them less prone to stress concentration during use. The circular windows also incorporate wavy protrusions to enhance contact with the installed steel balls, preventing localized stress. Furthermore, increasing the number of circular windows distributes the stress across each location. Additionally, the cage body incorporates a design with increased wall thickness in the center and external mesh-like reinforcing ribs, enhancing overall structural strength. This not only reduces the probability of damage but also extends service life, solving the problem of existing cages being easily damaged due to thin walls and internal stress concentration. Attached Figure Description

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

[0016] Figure 2 This is a partial front view of the corresponding position of the circular window hole in this utility model;

[0017] Figure 3 This is a cross-sectional view of the side wall of the cage body of this utility model;

[0018] Figure 4 Top view of the existing cage.

[0019] In the diagram: 1. Cage body; 2. Circular window; 3. Wavy protrusion; 4. Mesh reinforcing ribs. Detailed Implementation

[0020] 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.

[0021] like Figure 1-3As shown, this utility model provides a technical solution: a novel constant velocity universal joint retainer, including a retainer body 1, the wall thickness of the retainer body 1 at the center of the circumference is greater than the wall thickness at the edge, eight circular windows 2 are equidistantly arranged on the circumference of the retainer body 1, and wavy protrusions 3 are equidistantly arranged on the inner wall of the circular windows 2, the wavy protrusions 3 are integrally formed with the retainer body 1.

[0022] The radial thickness of the wavy protrusion 3 along the cage body 1 is less than the radial thickness of the cage body 1 at the corresponding position. The outer wall of the cage body 1 is uniformly provided with grid-like reinforcing ribs 4, which include warp ribs and weft ribs. Both the warp ribs and weft ribs are integral with the cage body 1. Blank areas without grid-like reinforcing ribs 4 are reserved around the circular window 2 and at the edge of the cage body 1.

[0023] By setting circular window holes 2, the shape of which differs from that of rectangular or rounded rectangular window holes, the circular shape is less prone to stress concentration during use. The circular window holes 2 are equipped with wavy protrusions 3 to increase the contact effect with the installed steel balls and avoid local stress. By increasing the number of circular window holes 2, the stress at each circular window hole 2 position can be distributed. In addition, the cage body 1 adopts a design with increased wall thickness in the middle and additional grid-like reinforcing ribs 4 on the outside, which increases the overall structural strength, thereby achieving the effect of dispersing stress and improving structural strength. This not only reduces the probability of damage but also extends the service life.

[0024] 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.

[0025] 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 novel constant velocity universal joint cage, characterized in that: The cage body (1) includes eight circular windows (2) that are equidistant from the inside and outside of the circumference of the cage body (1), and wavy protrusions (3) that are equidistant from the inside of the circular windows (2). The outer wall of the cage body (1) is uniformly provided with grid-like reinforcing ribs (4).

2. The novel constant velocity universal joint retainer according to claim 1, characterized in that: The wave-shaped protrusion (3) and the cage body (1) are an integral structure.

3. A novel constant velocity universal joint retainer according to claim 1, characterized in that: The radial thickness of the wavy protrusion (3) along the cage body (1) is less than the radial thickness of the cage body (1) at the corresponding position.

4. A novel constant velocity universal joint retainer according to claim 1, characterized in that: The wall thickness at the center of the circumference of the cage body (1) is greater than the wall thickness at the edge.

5. A novel constant velocity universal joint retainer according to claim 1, characterized in that: The area around the circular window (2) and the edge of the cage body (1) are both reserved with blank areas where no mesh-like reinforcing ribs (4) are provided.

6. A novel constant velocity universal joint retainer according to claim 1, characterized in that: The mesh-like reinforcing ribs (4) include warp ribs and weft ribs, and both warp ribs and weft ribs are integral with the cage body (1).

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