Dual-seal universal joint

Abstract

The utility model relates to the field of universal joint devices, and discloses a double-seal universal joint which comprises four sealing devices and a main body, the main body comprises a shaft body, the middle of the top end of the shaft body is fixedly connected with an oil storage tank, the middle of the top end of the oil storage tank is fixedly connected with an oil filling pipe, and the top end of the oil filling pipe is in threaded connection with a second sealing plug. Four shaft heads are fixedly connected to the side wall of the shaft body, oil channels are formed in the middles of the four shaft heads respectively, a plurality of balls are rotationally connected to the top ends of the four shaft heads respectively, the four sealing devices comprise sealing rings respectively, limiting grooves are formed in the side walls of the four sealing rings respectively, and the limiting grooves are matched with the limiting grooves. A plurality of roller pins are arranged on the sides, away from the shaft body, of the four sealing rings in a circumferential array mode. According to the double-seal universal joint, the sealing device is arranged, so that the overall sealing effect of the device is effectively improved, meanwhile, multiple oil channels are utilized, and it is effectively guaranteed that oil supply of the four shaft heads is balanced.

Description

Technical Field

[0001] The utility model relates to the field of universal joint devices, in particular to a double-sealed universal joint. Background Art

[0002] The cross-axis rigid universal joint is a widely used unequal velocity universal joint in automobiles. It consists of a cross shaft, two yokes, and four needle bearings. The holes in the two yokes fit over two pairs of journals on the cross shaft. This allows the driven shaft to rotate with it and also swing in any direction around the center of the cross shaft, thus accommodating simultaneous changes in angle and distance. The cross-axis rigid universal joint offers the advantages of simple structure and high transmission efficiency.

[0003] Although the prior art adds lubricating oil to the universal joint to reduce friction, impurities can easily enter the universal joint, causing wear of the universal joint after long-term use. Therefore, those skilled in the art provide a double-sealed universal joint to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a double-sealed universal joint, which provides a double-sealed universal joint that effectively improves the sealing effect of the entire device by setting a sealing device and effectively ensures balanced oil supply to the four shaft heads by utilizing multiple oil channels.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a double-sealed universal joint, comprising four sealing devices and a main body, wherein the four sealing devices are arranged on the side walls of the main body, the main body comprising a shaft body, an oil reservoir fixedly connected to the middle of the top of the shaft body, an oil filling pipe fixedly connected to the middle of the top of the oil filling pipe, a second sealing plug threadedly connected to the top of the oil filling pipe, four shaft heads fixedly connected to the side walls of the shaft body, oil channels respectively formed in the middle of the four shaft heads, and a plurality of balls rotatably connected to the tops of the four shaft heads;

[0006] Through the above technical solution, by setting the main body, setting the oil channel in the shaft head, and setting the oil storage tank in the shaft body, lubricating oil can be added to the device through the first sealing plug and the second sealing plug respectively, which can ensure the balanced oil supply to the four shaft heads. At the same time, when a sealing plug is damaged, the oil supply can still be compensated by each other, reducing the maintenance rate, increasing the service life, and further improving the sealing effect of the universal joint.

[0007] Furthermore, the four sealing devices respectively include a sealing ring, and the side walls of the four sealing rings are respectively provided with a limiting groove, and the four sealing rings are respectively provided with a plurality of needle rollers in a circumferential array on the side away from the shaft body, and the side walls of the four sealing rings are respectively rotatably connected to the housing, and the middle of the inner side walls of the four housings are respectively fixedly connected to the limiting blocks, and the tops of the four housings are respectively provided with a first sealing plug, and the four sealing rings are respectively rotatably connected to the side walls of the shaft head;

[0008] Through the above technical solution, by setting a sealing device, setting a sealing ring on the side wall of the shaft head, and setting a limit block inside the shell, the limit block and the sealing ring cooperate with each other, which can effectively improve the overall sealing effect of the device and effectively prevent impurities from entering the interior of the device.

[0009] Furthermore, the four oil passages respectively penetrate the shaft body and communicate with the inner side of the oil storage tank;

[0010] Through the above technical solution, the balanced oil supply is effectively guaranteed.

[0011] Furthermore, the four limiting blocks are respectively adapted to the four limiting slots;

[0012] Through the above technical solution, the side wall of the shaft is effectively sealed.

[0013] Furthermore, the plurality of needle rollers are respectively slidably connected to the four side walls of the shaft head;

[0014] The above technical solution effectively improves the stability of the housing during rotation.

[0015] Furthermore, a plurality of the balls are respectively slidably connected to the top end of the inner side wall of the shell;

[0016] The above technical solution effectively reduces the friction force when the housing rotates.

[0017] Furthermore, the four sealing rings are all made of rubber;

[0018] Through the above technical solution, the sealing effect is effectively improved.

[0019] Furthermore, the four shaft heads are arranged in a circumferential array with the side wall of the shaft body;

[0020] Through the above technical solution, the stability of device operation is effectively improved.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the present invention, a sealing device is provided, a sealing ring is provided on the side wall of the shaft head, and a limit block is provided inside the housing. Through the mutual cooperation of the limit block and the sealing ring, the overall sealing effect of the device can be effectively improved, and impurities can be effectively prevented from entering the interior of the device.

[0023] 2. In the present invention, by setting up a main body, setting an oil channel in the shaft head, and setting an oil storage tank in the shaft body, lubricating oil can be added to the device through the first sealing plug and the second sealing plug respectively, which can ensure balanced oil supply to the four shaft heads. At the same time, when a sealing plug is damaged, the oil supply can still be compensated by each other, thereby reducing the maintenance rate, increasing the service life, and further improving the sealing effect of the universal joint.

[0024] 3. In the present invention, by arranging a ball on the shaft head, the other end of the ball contacts the inside of the housing, and cooperates with the needle roller, the friction force of the device during rotation can be further improved, effectively improving the working efficiency of the universal joint during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional diagram of a double-sealed universal joint proposed in the present invention;

[0026] Figure 2 This is a side view of a double-sealed universal joint proposed by the present invention;

[0027] Figure 3 This is a cross-sectional view of a double-sealed universal joint proposed by the present invention;

[0028] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0029] Legend:

[0030] 1. Sealing device; 101. Housing; 102. First sealing plug; 103. Needle roller; 104. Sealing ring; 105. Limit block; 106. Limit groove; 2. Main body; 201. Shaft; 202. Oil filling pipe; 203. Second sealing plug; 204. Oil channel; 205. Shaft head; 206. Ball; 207. Oil storage tank. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Reference Figure 1-4 The utility model provides an embodiment: a double-sealed universal joint, comprising four sealing devices 1 and a main body 2, wherein the four sealing devices 1 are arranged on the side wall of the main body 2, the main body 2 comprises a shaft body 201, an oil storage tank 207 is fixedly connected to the middle of the top of the shaft body 201, an oil filling pipe 202 is fixedly connected to the middle of the top of the oil storage tank 207, a second sealing plug 203 is threadedly connected to the top of the oil filling pipe 202, four shaft heads 205 are fixedly connected to the side wall of the shaft body 201, and an oil channel 203 is respectively opened in the middle of the four shaft heads 205. 04. The top ends of the four shaft heads 205 are rotatably connected with a number of balls 206. By setting the main body 2, an oil channel 204 is set in the shaft head 205, and an oil storage tank 207 is set in the shaft body 201. Lubricating oil can be added to the device through the first sealing plug 102 and the second sealing plug 203 respectively, which can ensure the balanced oil supply of the four shaft heads 205. At the same time, when a sealing plug is damaged, the oil supply can still be compensated with each other, thereby reducing the maintenance rate, increasing the service life, and further improving the sealing effect of the universal joint.

[0033] The four sealing devices 1 respectively include sealing rings 104, and the side walls of the four sealing rings 104 are respectively provided with limiting grooves 106. The four sealing rings 104 are respectively provided with a plurality of roller needles 103 in a circular array on the side away from the shaft body 201. The side walls of the four sealing rings 104 are respectively rotatably connected to the shell 101, and the middle of the inner side walls of the four shells 101 are respectively fixedly connected to the limiting blocks 105. The tops of the four shells 101 are respectively provided with first sealing plugs 102. The four sealing rings 104 are respectively rotatably connected to the side walls of the shaft head 205. By setting the sealing device 1, the sealing ring 104 is set on the side wall of the shaft head 205, and the limiting block 105 is set inside the shell 101. Through the mutual cooperation of the limiting block 105 and the sealing ring 104, the overall sealing effect of the device can be effectively improved, and impurities can be effectively prevented from entering the interior of the device.

[0034] The four oil passages 204 respectively pass through the shaft body 201 and are connected with the inner side of the oil storage tank 207. The four limit blocks 105 are respectively adapted to the four limit grooves 106. Several needle rollers 103 are respectively slidably connected to the side walls of the four shaft heads 205. Several balls 206 are respectively slidably connected to the top of the inner wall of the shell 101. The four sealing rings 104 are all made of rubber. The four shaft heads 205 are respectively arranged in a circular array with the side walls of the shaft body 201. By arranging balls 206 on the shaft heads 205, the other ends of the balls 206 are in contact with the inside of the shell 101, and cooperate with the needle rollers 103, the friction force of the device during rotation can be further improved, thereby effectively improving the working efficiency of the universal joint during use.

[0035] Working principle: By setting up a sealing device 1, a sealing ring 104 is set on the side wall of the shaft head 205, and a limit block 105 is set inside the shell 101. Through the mutual cooperation of the limit block 105 and the sealing ring 104, the overall sealing effect of the device can be effectively improved, and impurities can be effectively prevented from entering the interior of the device. By setting up the main body 2, an oil channel 204 is set in the shaft head 205, and an oil storage tank 207 is set in the shaft body 201, lubricating oil can be added to the device through the first sealing plug 102 and the second sealing plug 203 respectively, which can ensure that the oil supply of the four shaft heads 205 is balanced. At the same time, when a sealing plug is damaged, the oil supply can still be compensated with each other, thereby reducing the maintenance rate, increasing the service life, and further improving the sealing effect of the universal joint. By setting a ball 206 on the shaft head 205, the other end of the ball 206 contacts the inside of the shell 101, and cooperates with the needle roller 103, the friction force of the device during rotation can be further improved, effectively improving the working efficiency of the universal joint during use.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-sealed universal joint, comprising four sealing devices (1) and a main body (2), wherein the four sealing devices (1) are arranged on the side walls of the main body (2), and characterized in that: The main body (2) comprises a shaft (201), an oil storage tank (207) is fixedly connected to the middle of the top of the shaft (201), an oil filling pipe (202) is fixedly connected to the middle of the top of the oil storage tank (207), a second sealing plug (203) is threadedly connected to the top of the oil filling pipe (202), four shaft heads (205) are fixedly connected to the side wall of the shaft (201), oil channels (204) are respectively opened in the middle of the four shaft heads (205), and a plurality of balls (206) are rotatably connected to the tops of the four shaft heads (205); The four sealing devices (1) respectively include a sealing ring (104), and the side walls of the four sealing rings (104) are respectively provided with a limiting groove (106). The four sealing rings (104) are respectively provided with a plurality of roller needles (103) in a circumferential array on the side away from the shaft body (201). The side walls of the four sealing rings (104) are respectively rotatably connected to the housing (101), and the middle of the inner side walls of the four housings (101) are respectively fixedly connected to the limiting block (105). The top ends of the four housings (101) are respectively provided with a first sealing plug (102), and the four sealing rings (104) are respectively rotatably connected to the side walls of the shaft head (205).

2. A double-sealed universal joint according to claim 1, characterized in that: The four oil passages (204) respectively penetrate the shaft body (201) and communicate with the inner side of the oil storage tank (207).

3. The double-sealed universal joint according to claim 1, characterized in that: The four limiting blocks (105) are respectively adapted to the four limiting slots (106).

4. The double-sealed universal joint according to claim 1, characterized in that: The plurality of rolling needles (103) are respectively connected in sliding connection with the side walls of the four shaft heads (205).

5. The double-sealed universal joint according to claim 1, characterized in that: The plurality of balls (206) are respectively slidably connected to the top end of the inner side wall of the housing (101).

6. The double-sealed universal joint according to claim 1, characterized in that: The four sealing rings (104) are all made of rubber.

7. The double-sealed universal joint according to claim 1, characterized in that: The four shaft heads (205) are arranged in a circular array with the side walls of the shaft body (201).

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