A high-lifespan ball-cage constant velocity drive shaft for new energy applications

Abstract

A high-life ball-cage constant velocity drive shaft for new energy applications. Its features include: an oil reservoir (212) located within the housing and communicating with the bottom of the raceway; and an auxiliary groove (213) extending along the circumferential inner wall of the housing to connect several of the raceways. This primarily addresses the problem that traditional ball-cage constant velocity drive shafts cannot meet the increased grease requirements of high-torque ball cages. This invention provides a high-life ball-cage constant velocity drive shaft for new energy applications, incorporating an oil reservoir within the ball raceway of the bell-shaped housing and adding a compensating annular auxiliary groove in the inner spherical region. This ensures structural strength while replenishing grease, thereby increasing service life.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a high-life ball cage constant velocity drive shaft for new energy applications. Background Technology

[0002] The development of constant velocity drive shafts for ball-cage universal joints is relatively mature and widely used in the automotive field. Motor-driven cars have large starting torques, and with the increasing market share of new energy vehicles year by year, the internal temperature of the ball cage rises significantly when high torque is input, which places higher demands on the grease. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a high-life ball cage constant velocity drive shaft for new energy applications, mainly solving the problem that traditional ball cage constant velocity drive shafts cannot meet the increased grease requirements of current high-torque ball cages.

[0004] The technical solution of this utility model is as follows:

[0005] A high-lifespan ball-cage type constant velocity drive shaft for new energy applications includes an intermediate shaft. One end of the intermediate shaft is connected to a first universal joint, and the other end is provided with a second universal joint. The first universal joint includes a housing, within which a cage is provided. A plurality of balls are mounted on the cage, and the inner wall of the housing has a plurality of grooves that mate with the balls.

[0006] An oil storage tank is located inside the casing and communicates with the bottom of the channel;

[0007] An auxiliary groove extends along the circumferential inner wall of the housing and is used to connect several of the channels.

[0008] The width of the oil storage tank is 0.1D~0.15D, and the depth of the oil storage tank is 0.05D~0.1D, where D is the diameter of the rolling ball.

[0009] The rolling ball is a steel ball.

[0010] The channel is provided with 8 channels, and each channel is provided with an oil storage tank at the bottom.

[0011] The shell is made of 55 steel and has a carburized layer on its surface.

[0012] The thickness of the carburized layer is 0.8-1.2 mm.

[0013] It also includes a dust cover, one end of which is connected to the intermediate shaft and the other end is connected to the outer wall of the housing.

[0014] The oil storage tank is an arc-shaped tank.

[0015] The beneficial effects of this utility model are: This utility model provides a high-life ball cage constant velocity drive shaft for new energy applications. It has an oil storage tank set in the ball raceway of the bell-shaped shell and a compensating annular auxiliary groove added in the inner spherical area. This ensures the structural strength while achieving grease replenishment and increasing service life. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0017] Figure 2 This is a partial perspective view of one embodiment of the present invention.

[0018] Figure 3 This is a cross-sectional schematic diagram of the first universal joint according to an embodiment of the present invention.

[0019] Figure 4 Figure 3 A cross-sectional view at point CC.

[0020] Figure 5 Figure 4 Enlarged diagram of point A in the middle. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings. A high-lifespan ball cage constant velocity drive shaft for new energy applications includes an intermediate shaft 1. One end of the intermediate shaft is connected to a first universal joint 2, and the other end is provided with a second universal joint 3. The first universal joint includes a housing 21, and a retainer 40 is provided inside the housing. A plurality of balls 41 are mounted on the retainer. The inner wall of the housing is provided with a plurality of grooves 211 that cooperate with the balls. It also includes an oil reservoir 212, which is located inside the housing and communicates with the bottom of the grooves. An auxiliary groove 213 extends along the circumferential inner wall of the housing and is used to connect the plurality of grooves. With prolonged use, the oil film adhesion of the steel balls and contact surfaces gradually decreases due to product abrasion. This application creates a groove between the two points of the steel ball contact groove and an annular groove in the circumferential direction on the inner surface of the bell-shaped shell between the two grooves. This can maintain the good performance of the oil film on the surface of the steel ball and extend its lifespan, while reducing the weight of the ball cage shell.

[0022] In this embodiment, as shown in the figure, the width of the oil storage tank is 0.1D~0.15D, and the depth of the oil storage tank is 0.05D~0.1D, where D is the diameter of the rolling ball. This achieves dynamic oil replenishment while ensuring structural strength.

[0023] In this embodiment, as shown in the figure, the rolling ball is a steel ball.

[0024] In this embodiment, as shown in the figure, there are eight channels, and each channel has an oil reservoir at its bottom. This improves lubrication.

[0025] In this embodiment, as shown in the figure, the housing is made of 55# steel and has a carburized layer on its surface. It also features a wear-resistant cavity.

[0026] In this embodiment, as shown in the figure, the thickness of the carburized layer is 0.8-1.2 mm.

[0027] In this embodiment, as shown in the figure, a dust cover 4 is also included. One end of the dust cover is connected to the intermediate shaft, and the other end is connected to the outer wall of the housing. This prevents foreign objects from entering the housing.

[0028] In this embodiment, as shown in the figure, the oil storage tank is an arc-shaped groove.

[0029] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A high-life ball-cage type constant velocity drive shaft for new energy applications, comprising an intermediate shaft (1), one end of which is connected to a first universal joint (2), and the other end of which is provided with a second universal joint (3). The first universal joint includes a housing (21), and a retainer (40) is provided inside the housing. A plurality of balls (41) are mounted on the retainer, and a plurality of grooves (211) that cooperate with the balls are provided on the inner wall of the housing. The shaft is characterized in that: Also includes An oil storage tank (212) is located inside the housing and communicates with the bottom of the channel; An auxiliary groove (213) is provided extending along the circumferential inner wall of the housing and is used to connect several of the channels.

2. A high-lifespan ball-cage constant velocity drive shaft for new energy applications according to claim 1, characterized in that: The width of the oil storage tank is 0.1D~0.15D, and the depth of the oil storage tank is 0.05D~0.1D, where D is the diameter of the rolling ball.

3. A high-lifespan ball-cage constant velocity drive shaft for new energy applications according to claim 1, characterized in that: The rolling ball is a steel ball.

4. A high-lifespan ball-cage constant velocity drive shaft for new energy applications according to claim 1, characterized in that: The channel is provided with 8 channels, and each channel is provided with an oil storage tank at the bottom.

5. A high-lifespan ball-cage constant velocity drive shaft for new energy applications according to claim 1, characterized in that: The shell is made of 55 steel and has a carburized layer on its surface.

6. A high-lifespan ball-cage constant velocity drive shaft for new energy applications according to claim 5, characterized in that: The thickness of the carburized layer is 0.8-1.2 mm.

7. A high-lifespan ball-cage type constant velocity drive shaft for new energy applications according to any one of claims 1-6, characterized in that: It also includes a dust cover (4), one end of which is connected to the intermediate shaft and the other end is connected to the outer wall of the housing.

8. A high-lifespan ball-cage type constant velocity drive shaft for new energy applications according to any one of claims 1-6, characterized in that: The oil storage tank is an arc-shaped tank.

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