Novel transmission shaft universal joint sealing structure design

Abstract

The utility model discloses a novel transmission shaft universal joint sealing structure design, which belongs to the field of automobile parts, and mainly comprises a universal joint main body, the universal joint main body comprises an outer sealing rubber ring fixing groove, a ball rolling groove and a universal joint shaft, the outer sealing rubber ring fixing groove is fixedly connected with an outer sealing rubber ring, and the ball rolling groove is fixedly connected with a ball bearing. A ball rolling groove is formed in the universal joint shaft, a ball is connected to the ball rolling groove in a rolling mode, a matched end is arranged on the universal joint shaft, an end ball groove connected with the ball in a matched and rolling mode is formed in the end, an end limit is further arranged on the end, and an elastic device is fixedly connected to the side, close to the end ball groove, of the end limit. According to the universal joint, the sealing performance of the universal joint in the operation process is improved, dry friction caused by oil leakage during rotation of the universal joint is avoided, and the service life of the universal joint is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of automobile accessories, and in particular relates to a novel transmission shaft universal joint sealing structure design. Background Art

[0002] A cross-shaft universal joint is a type of universal joint consisting of a cross shaft, sleeve, needle rollers, and oil seals. The four journals of the cross shaft mate with sleeves, which in turn connect to the yokes, enabling power transmission at various angles. Its advantages include a simple structure, high transmission efficiency, and the ability to accommodate large angle changes.

[0003] Patent publication number CN108006093B discloses a universal joint cross shaft comprising: a cross-shaped universal joint base, each end of which has a terminal; longitudinal and transverse oil passages within the universal joint base, with the longitudinal oil passage extending through the center of the universal joint base and a pair of longitudinal terminal ends; and transverse oil passages extending through the center of the universal joint base and a pair of transverse terminal ends; radial oil holes are also provided on the terminal ends, connecting to the longitudinal oil passages or the transverse oil passages. While this patent addresses the problem of increasing lubrication and reducing friction, dry friction and other issues are unavoidable during long-term operation of the universal joint due to oil leakage.

[0004] In response to the above technical problems, this application proposes a solution. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to overcome the deficiencies of the existing technology and provide a new transmission shaft universal joint sealing structure design, in which an end ball groove is provided on the end head, balls are provided in the end ball groove, the balls fall into the ball rolling groove to complete the locking, and an external sealing rubber ring is provided on one side of the end head for cooperation, so that the device will not leak oil when it is running, and the sealing effect is better.

[0006] The described new transmission shaft universal joint sealing structure design includes a universal joint body, which is provided with an outer sealing rubber ring fixing groove, a ball rolling groove, and a universal joint shaft in sequence from the inside to the outside. A matching anti-wear pad is provided on one side of the universal joint shaft, and an end head is fixedly connected to one side of the anti-wear pad, which is nested on the universal joint shaft. A groove is provided on the end head, and an elastic device, a sealing ring, and an outer telescopic cover are provided in sequence inside the groove from the inside to the outside. One side of the elastic device is fixedly connected to the inside of the groove, and the other side of the elastic device is fixedly connected to one side of the sealing ring. The sealing ring is slidably connected to the groove, and the other side of the sealing ring is fixedly connected to the outer telescopic cover, and the outer telescopic cover is slidably connected to the groove.

[0007] Preferably, an arcuate groove is provided inside the outer telescopic cover, a ball is rollingly connected in the arcuate groove, and four sets of limit switches are fixedly connected to the outside of the outer telescopic cover.

[0008] Preferably, the inner layer of the end head is provided with multiple groups of end head ball grooves, the multiple groups of end head ball grooves are rollingly connected to the balls, the bottom of the balls are rollingly connected to the ball rolling grooves, and the outer layer of the end head is provided with four groups of limit grooves slidingly connected with the limit cooperation.

[0009] Preferably, the height of the limit is consistent with the height of the limit slot, and the width of the limit is consistent with the width of the limit slot.

[0010] Preferably, an outer sealing rubber ring is fixedly connected to the outer sealing rubber ring fixing groove, and one side of the outer sealing rubber ring abuts against the outer telescopic cover.

[0011] Preferably, the side of the universal joint shaft is rotatably connected to multiple groups of needle rollers, one side of the multiple groups of needle rollers is rollingly connected to the inner side of the end head, each group of needle rollers has two rollers, and the rollers close to the anti-wear pad are against the anti-wear pad.

[0012] Preferably, the end ball rolling groove adopts a design of being narrow inside and wide outside, the narrowest part of the end ball rolling groove is equal to the diameter of the ball, and the curvature of the ball rolling groove is consistent with the curvature of the ball.

[0013] Preferably, the sealing ring is designed to be multi-layered, with the middle portion being made of steel and the two sides being made of rubber.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model cooperates with the universal joint body through the end head and the outer telescopic cover. The balls on the end head fall into the ball rolling groove on the universal joint body, so that the end head and the universal joint body are closely matched, which can prevent the universal joint from leaking oil due to poor sealing during operation.

[0016] 2. An elastic device is provided between the outer telescopic cover and the end head. By moving the outer telescopic cover, the end head can be quickly removed from the universal joint body. The universal joint body is provided with an outer sealing rubber ring that fits closely with the outer telescopic cover and the end head. A sealing ring is also provided inside the end head groove for further sealing, thereby improving the sealing effect and increasing the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A new structural diagram is used for this purpose;

[0018] Figure 2 A schematic diagram of a new external structure is used for this purpose;

[0019] Figure 3 Schematic diagram of the structure of the external sealing ring;

[0020] Figure 4 It is a structural diagram of the end;

[0021] Figure 5 Schematic diagram of the internal structure of the terminal;

[0022] Figure 6 is a schematic structural diagram of the elastic device;

[0023] Figure 7 It is a structural diagram of the universal joint body;

[0024] Figure 8 Schematic diagram of the internal structure of the outer telescopic cover;

[0025] Figure 9 It is a structural diagram of the outer telescopic cover.

[0026] In the figure, 1. Universal joint body; 101. External sealing rubber ring fixing groove; 102. Ball rolling groove; 103. Universal joint shaft; 2. External telescopic cover; 201. Arc groove; 202. Limiting groove; 3. End; 301. Sealing ring; 302. End ball groove; 303. Limiting groove; 304. Groove; 4. External sealing rubber ring; 5. Ball; 6. Elastic device; 7. Needle roller; 8. Anti-wear pad. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] The directional terms used in the detailed description are intended solely to facilitate understanding of the technical solutions described herein by those skilled in the art based on the visual orientation shown in the accompanying drawings. Unless otherwise specified or limited, the terms "dispose," "install," and "connect" are to be interpreted broadly, and those skilled in the art will understand their specific meanings in this utility model based on the specific circumstances.

[0029] like Figures 1 to 7 A novel drive shaft universal joint sealing structure design includes a universal joint body 1, which provides support and steering. From the inside out, the universal joint body 1 is provided with an outer sealing rubber ring retaining groove 101, a ball rolling groove 102, and a universal joint shaft 103. An anti-wear pad 8 is provided on one side of the universal joint shaft 103 to provide a seal and prevent grease leakage from the shaft 103.

[0030] like Figure 1As shown, the anti-wear pad 8 is fixedly connected to the end 3 on one side, and the end 3 is nested on the universal joint shaft 103. The end 3 is provided with a groove 304. The interior of the groove 304 is provided with an elastic device 6, a sealing ring 301, and an outer telescopic cover 2 in sequence from the inside to the outside. One side of the elastic device 6 is fixedly connected to the interior of the groove 304. In the utility model, the elastic device 6 uses a spring, and the other side of the elastic device 6 is fixedly connected to one side of the sealing ring 301. The sealing ring 301 used in the utility model is a steel plate with rubber on both sides of the steel plate. This has the advantage of ensuring both support and sealing. The sealing ring 301 is slidably connected to the groove 304, and the sealing ring 301 can slide left and right inside the groove 304. The other side of the sealing ring 301 is fixedly connected to the outer telescopic cover 2, and the outer telescopic cover 2 is slidably connected to the groove 304.

[0031] like Figure 8 and Figure 9 As shown, the outer telescopic cover 2 is provided with an arcuate groove 201 inside. The arcuate groove 201 has a small curvature and only acts as a limit for the ball 5 to prevent the ball 5 from shifting during operation of the universal joint. The ball 5 is connected to the arcuate groove 201 in a rolling manner, and four sets of limiters 202 are fixedly connected to the outside of the outer telescopic cover 2.

[0032] like Figure 4 and Figure 5 As shown, the inner layer of the endpiece 3 is provided with multiple sets of endpiece ball grooves 302, which are in rolling connection with the balls 5, with the majority of the balls 5 being stored in the endpiece ball grooves 302. The bottom of the balls 5 is in rolling connection with the ball rolling grooves 102. When the balls 5 fall into the ball rolling grooves 102, the universal joint shaft 103 and the endpiece 3 are locked. The outer layer of the endpiece 3 is provided with four sets of limit grooves 303 that are in sliding connection with the limiters 202. The height of the limiters 202 is consistent with the height of the limit grooves 303, and the width of the limiters 202 is consistent with the width of the limit grooves 303. The advantage of this design is that it ensures that the limiters 202 will not shift when moving within the limit grooves 303.

[0033] The outer sealing rubber ring fixing groove 101 is fixedly connected with the outer sealing rubber ring 4 , and one side of the outer sealing rubber ring 4 abuts against the outer telescopic cover 2 .

[0034] The universal joint shaft 103 is rotatably connected to multiple groups of needle rollers 7 on the side. One side of the multiple groups of needle rollers 7 is rollingly connected to the inner side of the end head 3. Each group of needle rollers 7 has two rollers, and the rollers close to the anti-wear pad 8 are against the anti-wear pad 8.

[0035] The end ball groove 302 adopts a narrow inside and wide outside design. The narrowest part of the end ball groove 302 is equal to the diameter of the ball 5. The curvature of the ball rolling groove 102 is consistent with the curvature of the ball 5. The advantage of this design is that it ensures that the ball 5 can roll smoothly in the ball rolling groove 102 without any obstruction.

[0036] The installation process of this utility model: Figure 1 As shown, the first step is to install the elastic device 6, the sealing ring 301 and the outer telescopic cover 2 in the groove 304 of the end 3 in sequence, push the limit 202 on the outer telescopic cover 2, and push the outer telescopic cover 2 in the direction of the compression elastic device 6 to make the end ball groove 302 leak out, and then install the ball 5 in the end ball groove 302 in sequence, and apply grease to make the ball 5 stick to the end ball groove 302, return the outer telescopic cover 2 to its original position, and finally install the anti-wear pad 8 inside the end 3, install the needle roller 7 on the inner side of the end 3 and fix it with grease.

[0037] The second step is to install the outer sealing rubber ring 4 in the outer sealing rubber ring fixing groove 101. The end head 3 with the needle roller 7 is pushed into the universal joint shaft 103 along one side of the universal joint shaft 103. When the ball 5 falls into the ball rolling groove 102, the installation is completed. Finally, one side of the outer sealing rubber ring 4 is inserted into the gap between the outer telescopic cover 2 and the end head 3 to complete the installation.

[0038] If you need to remove the end head 3 from the universal joint body 1, just push the limit 202 to slide the outer telescopic cover 2 to one side, see the ball 5, pull out the end head 3 backward, and the ball 5 will be disengaged from the ball rolling groove 103, releasing the lock and then you can remove the end head 3.

[0039] After the installation of the utility model is completed, the elastic device 6 between the outer telescopic cover 2 and the groove 304 will push the sealing ring 301 to one side, thereby pushing the outer telescopic cover 2, and the outer sealing rubber ring 4 fixed on the universal joint body 1 will push the outer telescopic cover 2 to the opposite direction, which will make the outer sealing rubber ring 4 and the outer telescopic cover 2 fit more tightly and the sealing effect will be better.

[0040] Finally, although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A novel transmission shaft universal joint sealing structure design, comprising a universal joint body (1), characterized in that: The universal joint body (1) is provided with an outer sealing rubber ring fixing groove (101), a ball rolling groove (102), and a universal joint shaft (103) in sequence from the inside to the outside. A matching anti-wear pad (8) is provided on one side of the universal joint shaft (103). One side of the anti-wear pad (8) is fixedly connected to an end head (3), which is nested on the universal joint shaft (103). A groove (304) is provided on the end head (3). An elastic device (6), a sealing ring (301), and an outer telescopic cover (2) are provided in sequence from the inside to the outside of the groove (304). One side of the elastic device (6) is fixedly connected to the inside of the groove (304), and the other side of the elastic device (6) is fixedly connected to one side of the sealing ring (301). The sealing ring (301) is slidably connected to the groove (304). The other side of the sealing ring (301) is fixedly connected to the outer telescopic cover (2), and the outer telescopic cover (2) is slidably connected to the groove (304).

2. A novel transmission shaft universal joint sealing structure design according to claim 1, characterized in that: An arcuate groove (201) is provided inside the outer telescopic cover (2), a ball (5) is rollingly connected inside the arcuate groove (201), and four sets of limiters (202) are fixedly connected to the outside of the outer telescopic cover (2).

3. A novel transmission shaft universal joint sealing structure design according to claim 2, characterized in that: The inner layer of the end head (3) is provided with a plurality of end head ball grooves (302), the plurality of end head ball grooves (302) are rollingly connected to the balls (5), the bottom of the balls (5) is rollingly connected to the ball rolling grooves (102), and the outer layer of the end head (3) is provided with four groups of limit grooves (303) that are slidingly connected to the limit (202).

4. A novel transmission shaft universal joint sealing structure design according to claim 3, characterized in that: The height of the limiter (202) is consistent with the height of the limiter slot (303), and the width of the limiter (202) is consistent with the width of the limiter slot (303).

5. The novel transmission shaft universal joint sealing structure design according to claim 1 is characterized by: An outer sealing rubber ring (4) is fixedly connected to the outer sealing rubber ring fixing groove (101), and one side of the outer sealing rubber ring (4) abuts against the outer telescopic cover (2).

6. The novel transmission shaft universal joint sealing structure design according to claim 1 is characterized by: The universal joint shaft (103) is rotatably connected to a plurality of groups of needle rollers (7) on the side thereof, and one side of the plurality of groups of needle rollers (7) is rollingly connected to the inner side of the end head (3). Each group of needle rollers (7) has two rollers, and the rollers close to the anti-wear pad (8) are against the anti-wear pad (8).

7. The novel transmission shaft universal joint sealing structure design according to claim 3 is characterized by: The end ball groove (302) is designed to be narrow inside and wide outside. The narrowest part of the end ball groove (302) is equal to the diameter of the ball (5). The curvature of the ball rolling groove (102) is consistent with the curvature of the ball (5).

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