A ball cage constant velocity joint

Abstract

The utility model belongs to the technical field of universal joint, concretely relates to a ball cage type constant angular velocity universal joint, including connecting mechanism and lubricating mechanism, connecting mechanism includes the outer sleeve assembly that has the arc outer raceway of inner surface, the star cover that has the arc inner raceway of outer surface, the ball cage that has the window of outer surface and the steel ball in the window, wherein, the steel ball is located in the raceway cavity between the arc outer raceway and the arc inner raceway, lubricating mechanism is installed on the ball cage and when the steel ball is rolling in the window, the outer surface of the steel ball is lubricated automatically, this kind of ball cage type constant angular velocity universal joint, replace traditional ball cage type constant angular velocity universal joint, avoid the sliding friction between its internal steel ball and raceway to be big, thereby the wear aggravation and the poor lubricating effect, further lead to the problem that the service life of universal joint is limited.

Description

Technical Field

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

[0002] In the field of mechanical transmission, the ball cage type constant angular velocity universal joint occupies a pivotal position. As a key component that can achieve constant angular velocity transmission when there is an angle between two shafts, it is widely used in many fields such as automobiles, aerospace, and industrial machinery.

[0003] Although ball cage constant velocity universal joints play an important role in current mechanical transmission, with the rapid development of technology and the continuous improvement of the performance requirements of various industries for mechanical equipment, the existing ball cage constant velocity universal joints have gradually revealed their limitations in some aspects. Traditional ball cage universal joints are usually composed of an outer star wheel, an inner star wheel, a cage (ball cage), and multiple force-transmitting steel balls. The steel balls roll in the raceways of the inner and outer star wheels to achieve constant speed transmission of power. At large working angles, the sliding friction between the steel balls and the raceways, and between the cage and the inner and outer star wheels, increases, leading to faster temperature rise, more severe wear, and affecting service life and transmission efficiency. At the same time, under high-speed or large-angle conditions, the internal grease is difficult to distribute evenly and continuously to all contact surfaces, which easily forms local dry friction, thus greatly reducing its service life and increasing the damage rate during use. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] Therefore, the purpose of this utility model is to provide a ball cage type constant velocity universal joint to replace the traditional ball cage type constant velocity universal joint, thereby avoiding the problem that the internal steel balls and raceways have large sliding friction, which leads to increased wear and poor lubrication, thus limiting the service life of the universal joint.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0007] A ball-cage type constant angular velocity universal joint, comprising:

[0008] A connecting mechanism includes an outer sleeve assembly with an arc-shaped outer raceway on its inner surface, a star-shaped sleeve with an arc-shaped inner raceway on its outer surface, a ball cage with a window on its outer surface, and a steel ball located within the window, wherein the steel ball is located within a raceway cavity between the arc-shaped outer raceway and the arc-shaped inner raceway;

[0009] A lubrication mechanism is installed on the ball cage and automatically lubricates the outer surface of the steel ball as it rolls within the window.

[0010] As a preferred embodiment of the ball cage type constant angular velocity universal joint described in this utility model, the cross-sectional profiles of the arc-shaped outer raceway and the arc-shaped inner raceway are Gothic arches.

[0011] In a preferred embodiment of the ball cage type constant angular velocity universal joint described in this utility model, the side edge of the window is provided with a rounded corner structure.

[0012] As a preferred embodiment of the ball cage type constant angular velocity universal joint described in this utility model, the lubrication mechanism includes an oil storage chamber located inside the ball cage and a lubrication component located on the side wall of the window and communicating with the oil storage chamber.

[0013] In a preferred embodiment of the ball cage type constant angular velocity universal joint described in this utility model, the lubrication component is a sponge layer located on the side wall of the window and communicating with the oil storage cavity.

[0014] As a preferred embodiment of the ball cage type constant angular velocity universal joint described in this utility model, the ball cage is made of powder metallurgy material containing solid lubricant.

[0015] Compared with the prior art, the beneficial effects of this utility model are that the ball cage type constant velocity universal joint, by having steel balls roll in the raceway cavity between the arc-shaped outer raceway and the arc-shaped inner raceway, reduces the number of contact points formed when the steel balls come into contact, disperses the load, and thus reduces frictional damage. At the same time, the lubrication mechanism automatically lubricates the steel balls, thereby reducing the external friction force received by the steel balls when they roll. It replaces the traditional ball cage type constant velocity universal joint, avoiding the problem of large sliding friction between the internal steel balls and the raceway, which leads to increased wear and poor lubrication effect, thus limiting the service life of the universal joint. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 This is a schematic diagram of the structure of a ball cage type constant angular velocity universal joint according to the present invention;

[0018] Figure 2This is a structural exploded view of a ball-cage type constant angular velocity universal joint according to this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the ball cage of a ball cage type constant angular velocity universal joint according to the present invention.

[0020] In the figure: 100, connecting mechanism; 110, outer sleeve assembly; 110a, arc-shaped outer raceway; 120, star-shaped sleeve; 120a, arc-shaped inner raceway; 130, ball cage; 130a, window; 140, steel ball; 150, drive shaft; 200, lubrication mechanism. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0024] This invention provides a ball cage type constant velocity universal joint, which replaces the traditional ball cage type constant velocity universal joint. It avoids the problem that the internal steel balls and raceways have large sliding friction, which leads to increased wear and poor lubrication, thus limiting the service life of the universal joint.

[0025] Figures 1-3 The diagram shown is a structural schematic of a ball-cage type constant angular velocity universal joint according to this utility model. Please refer to [link / reference]. Figures 1-3 This paper provides a detailed introduction to this type of ball-cage type constant angular velocity universal joint.

[0026] Example 1

[0027] refer to Figures 1-3 This utility model discloses a ball cage type 130 constant angular velocity universal joint, the main body of which includes a connecting mechanism 100 and a lubrication mechanism 200.

[0028] The connecting mechanism 100 includes an outer sleeve assembly 110 with an arc-shaped outer raceway 110a on its inner surface, a star-shaped sleeve 120 with an arc-shaped inner raceway 120a on its outer surface, a ball cage 130 with a window 130a on its outer surface, and a steel ball 140 located within the window 130a. The steel ball 140 is located in the raceway cavity between the arc-shaped outer raceway 110a and the arc-shaped inner raceway 120a. The outer sleeve assembly 110, the star-shaped sleeve 120, the steel ball 140, and the ball cage 130 form a universal joint body. The sidewall of the star-shaped sleeve 120 is connected to the drive structure via a drive shaft 150. Meanwhile, the steel ball 140 is located in the raceway cavity between the arc-shaped outer raceway 110a and the arc-shaped inner raceway 120a, so that the steel ball 140 contacts two points simultaneously when in contact, thereby dispersing the friction load and reducing friction damage.

[0029] The lubrication mechanism 200 is used to automatically lubricate the outside of the steel ball 140 when the steel ball 140 is rolling. The lubrication mechanism 200 is installed on the ball cage 130 and automatically lubricates the outer surface of the steel ball 140 when the steel ball 140 is rolling in the window 130a.

[0030] In this embodiment, the cross-sectional profiles of the arc-shaped outer raceway 110a and the arc-shaped inner raceway 120a are Gothic arches, which are used to make the arc-shaped outer raceway 110a and the arc-shaped inner raceway 120a smoothly connected by two non-concentric small-radius circular arcs, so that when the steel ball 140 contacts it, two contact points are formed, thus dispersing the load.

[0031] In this embodiment, the side edge of the window 130a is provided with a rounded corner structure to reduce the friction between the steel ball 140 and the window 130a when the ball rolls. The radius of the rounded corner is optimized to reduce stress concentration and improve the impact fatigue strength of the ball cage 130.

[0032] In this embodiment, the lubrication mechanism 200 includes an oil storage chamber located inside the ball cage 130 and a lubrication assembly located on the side wall of the window 130a and communicating with the oil storage chamber. The oil storage chamber is used to store lubricating oil, and the lubrication assembly is used to apply lubricating oil to the surface of the steel ball 140 when the steel ball 140 rolls.

[0033] In this embodiment, the lubrication component is a sponge layer located on the side wall of window 130a and communicating with the oil storage cavity. It is used to prevent the steel ball 140 from being coated with lubricating oil when the steel ball 140 rolls after absorbing lubricating oil.

[0034] In this embodiment, the ball cage 130 is made of powder metallurgy material containing solid lubricant, which is used to reduce the friction between the ball cage 130 and the steel ball 140.

[0035] In this embodiment, the specific usage process is as follows: During operation, the torque is transmitted to the steel ball 140 through the star-shaped sleeve 120. Guided by the ball cage 130, the steel ball 140 rolls in the raceway cavity formed by the outer raceway of the arc plate and the inner raceway of the arc plate 120a, transmitting the torque to the outer sleeve assembly 110 at a constant speed. During this process, the self-lubricating properties of the ball cage 130 reduce its friction with the inner and outer parts. At the same time, the sponge layer that absorbs lubricating oil evenly coats the surface of the steel ball 140 with lubricating oil, thereby increasing the lubrication effect on the steel ball 140 and improving the overall service life. The Gothic arched raceway and the rounded corner edge of the window 130a together ensure the durability of the component under high load.

[0036] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A ball cage (130) type constant angular velocity universal joint, characterized in that, include: The connecting mechanism (100) includes an outer sleeve assembly (110) having an arc-shaped outer raceway (110a) on its inner surface, a star-shaped sleeve (120) having an arc-shaped inner raceway (120a) on its outer surface, a ball cage (130) having a window (130a) on its outer surface, and a steel ball (140) located in the window (130a), wherein the steel ball (140) is located in the raceway cavity between the arc-shaped outer raceway (110a) and the arc-shaped inner raceway (120a); A lubrication mechanism (200) is mounted on the ball cage (130) and automatically lubricates the outer surface of the steel ball (140) as the steel ball (140) rolls within the window (130a).

2. The ball cage (130) type constant angular velocity universal joint according to claim 1, characterized in that, The cross-sectional profiles of the outer arc-shaped raceway (110a) and the inner arc-shaped raceway (120a) are Gothic arches.

3. A ball cage (130) type constant angular velocity universal joint according to claim 2, characterized in that, The side edges of the window (130a) are provided with a rounded corner structure.

4. A ball cage (130) type constant angular velocity universal joint according to claim 3, characterized in that, The lubrication mechanism (200) includes an oil storage chamber located inside the ball cage (130) and a lubrication assembly located on the side wall of the window (130a) and communicating with the oil storage chamber.

5. A ball cage (130) type constant angular velocity universal joint according to claim 4, characterized in that, The lubrication component is a sponge layer located on the side wall of the window (130a) and communicating with the oil storage cavity.

6. A ball cage (130) type constant angular velocity universal joint according to claim 5, characterized in that, The ball cage (130) is made of powder metallurgy material containing solid lubricant.

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