Constant velocity universal joint

Abstract

The utility model relates to the technical field of automobile parts, in particular to a constant velocity universal joint which comprises a spherical shell, a first transmission shaft is welded to the center of the right side of the spherical shell, a starlike sleeve is installed on the left side of an inner cavity of the spherical shell, a retainer is installed on the surface of the starlike sleeve in a sleeved mode, and a positioning steel ball is installed between the retainer and the spherical shell. A mounting block is mounted in an inner cavity of the starlike sleeve in a penetrating mode, a homogenizing lubricating mechanism is mounted in an inner cavity of the mounting block, and a second transmission shaft is welded to the left side of the mounting block. By arranging the mounting block and the homogenizing lubricating mechanism, the lubricating device has the advantage of uniform lubrication, a proper amount of gas can be introduced into the oil storage cylinder by utilizing gas injection equipment, oil is extruded and sprayed on the surfaces of the positioning steel balls through the oil spraying head by virtue of displacement of the sealing plate, and a plurality of positioning steel balls can be lubricated by one-time operation; and meanwhile, the phenomena of oil leakage, excessive lubrication or incomplete lubrication are avoided, and the actual use requirements are better met.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to a constant velocity universal joint. Background Art

[0002] Among automotive accessories, a constant velocity joint is a mechanical device that enables two shafts to transmit power at equal angular velocities at different positions or angles. Its main function is to ensure that the drive shaft maintains a constant speed regardless of how the wheels swing during the driving of the car, thereby avoiding power loss and unevenness caused by angle changes.

[0003] After searching, the patent number is CN214578421U, and the name is a utility model of a constant velocity universal joint, including a bell-shaped housing and a star-shaped sleeve. Through research and analysis, it is found that although it is convenient for oil injection, it still has the following disadvantages to a certain extent.

[0004] For example, this component uses a spring to press and leak oil to lubricate the arc piece, but the position of the steel ball in the arc piece is not fixed. If it is necessary to ensure that the steel ball can be lubricated at any position, the specifications of the connecting groove will be greatly increased, which is prone to oil waste. At the same time, the spring is pressed by the spring. When the shaft rotates at a high speed, the spring is prone to elastic deformation due to centrifugal force, which is prone to oil leakage. In addition, the manual control of lubrication not only requires multiple manipulations of structures in different positions for lubrication operations, but also cannot well judge the oil discharge volume, which is prone to over-lubrication or incomplete lubrication. In order to solve the above technical problems, we have designed a constant velocity universal joint. Utility Model Content

[0005] The purpose of the utility model is to provide a constant velocity universal joint, which has the advantage of uniform lubrication and solves the problem that the component is prone to oil waste. In addition, the manual control of lubrication cannot well judge the oil discharge amount, which is prone to over-lubrication or incomplete lubrication, and has certain limitations.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a constant velocity universal joint, comprising a spherical shell, a first transmission shaft is welded at the center of the right side of the spherical shell, a star-shaped sleeve is installed on the left side of the inner cavity of the spherical shell, a retaining frame is installed on the surface of the star-shaped sleeve, a positioning steel ball is installed between the retaining frame and the spherical shell, a mounting block is installed through the inner cavity of the star-shaped sleeve, a homogenizing lubrication mechanism is installed in the inner cavity of the mounting block, and a second transmission shaft is welded on the left side of the mounting block.

[0007] Preferably, the homogenizing lubrication mechanism comprises an oil storage cylinder and a small pressure gauge, the small pressure gauge is fixedly mounted on the mounting block by screws, and the oil storage cylinder is placed inside the mounting block.

[0008] Preferably, a spring is fixedly connected to the left side of the inner cavity of the oil storage cylinder, and a sealing plate is fixedly connected to the other end of the spring. The outer ring of the sealing plate is in sliding contact with the inner wall of the oil storage cylinder and performs sealing treatment.

[0009] Preferably, the left side of the inner cavity of the oil storage cylinder is respectively connected with a second one-way valve and an oil filling valve, the second one-way valve is located on the left side of the sealing plate, and the oil filling valve is located on the right side of the sealing plate.

[0010] Preferably, the right side of the inner cavity of the oil storage cylinder is connected to an oil spray head, and a first one-way valve is sleeved and installed on the surface of the oil spray head.

[0011] Preferably, the number of the oil spray heads is consistent with the number of the positioning steel balls, the flow direction of the second one-way valve is from outside to inside, and the flow direction of the oil spray heads is from inside to outside.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model has the advantage of uniform lubrication by arranging a mounting block and a homogenizing lubrication mechanism, and can use a gas injection device to introduce a proper amount of gas into the oil storage cylinder, and the sealing plate is displaced to squeeze the oil through the oil spray head and spray it onto the surface of the positioning steel ball. The lubrication of multiple positioning steel balls can be completed in one operation, and at the same time, there will be no oil leakage, over-lubrication or incomplete lubrication, which is more in line with actual use needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a bottom-up stereogram of the structure of the utility model;

[0016] Figure 3 It is a sectional stereoscopic diagram of the structure of the utility model;

[0017] Figure 4 It is a three-dimensional schematic diagram of the utility model when the structure is separated;

[0018] Figure 5 It is a sectional stereoscopic diagram of the local structure of the utility model;

[0019] Figure 6 It is a sectional stereoscopic diagram of the homogenizing lubrication mechanism of the utility model.

[0020] In the figure: 1, spherical shell; 2, first transmission shaft; 3, second transmission shaft; 4, mounting block; 5, retaining frame; 6, homogenizing lubrication mechanism; 601, small pressure gauge; 602, oil storage cylinder; 603, oil spray head; 604, first one-way valve; 605, spring; 606, sealing plate; 607, oil filling valve; 608, second one-way valve; 7, positioning steel ball; 8, star sleeve. DETAILED DESCRIPTION

[0021] See also Figure 1-Figure 6 A constant velocity universal joint comprises a spherical shell 1, a first transmission shaft 2 is welded at the center of the right side of the spherical shell 1, a star sleeve 8 is installed on the left side of the inner cavity of the spherical shell 1, a retaining frame 5 is sleeved and installed on the surface of the star sleeve 8, a positioning steel ball 7 is installed between the retaining frame 5 and the spherical shell 1, a mounting block 4 is installed through the inner cavity of the star sleeve 8, and by providing the mounting block 4, the installation space requirement for the homogenized lubrication mechanism 6 can be met, the inner cavity of the mounting block 4 is installed with the homogenized lubrication mechanism 6, and the left side of the mounting block 4 is welded with a second transmission shaft 3;

[0022] See also Figure 3 , Figure 4 , Figure 5 and Figure 6 The homogenizing lubrication mechanism 6 includes an oil storage cylinder 602 and a small pressure gauge 601. The small pressure gauge 601 is fixedly mounted on the mounting block 4 by screws. By setting the small pressure gauge 601, the air pressure on the left side of the inner cavity of the oil storage cylinder 602 can be detected. The oil storage cylinder 602 is placed inside the mounting block 4. By setting the oil storage cylinder 602, it is possible to store an appropriate amount of lubricating oil and meet the installation requirements of the spring 605 and the displacement space requirements of the sealing plate 606.

[0023] See also Figure 3 , Figure 4 , Figure 5 and Figure 6 The left side of the inner cavity of the oil storage cylinder 602 is fixedly connected with a spring 605. By setting the spring 605, the sealing plate 606 can be elastically connected. In the absence of external force, the sealing plate 606 is maintained at the left side of the inner cavity of the oil storage cylinder 602 and between the oil injection valve 607 and the second one-way valve 608. The other end of the spring 605 is fixedly connected with a sealing plate 606. The outer ring of the sealing plate 606 is in sliding contact with the inner wall of the oil storage cylinder 602 and is sealed. By setting the sealing plate 606, it can slide and seal with the inner wall of the oil storage cylinder 602, so that when the sealing plate 606 moves to the right, the oil can be sprayed out from the oil storage cylinder 602 through the oil spray head 603;

[0024] See also Figure 3 , Figure 4 , Figure 5 and Figure 6The left side of the inner cavity of the oil storage cylinder 602 is connected with a second one-way valve 608 and an oil filling valve 607, respectively. The second one-way valve 608 is located on the left side of the sealing plate 606, and the oil filling valve 607 is located on the right side of the sealing plate 606;

[0025] See also Figure 3 , Figure 4 , Figure 5 and Figure 6 The right side of the inner cavity of the oil storage cylinder 602 is connected with an oil spray head 603. By setting the oil spray head 603, the transmission oil can be guided and sprayed. By setting the first one-way valve 604 and the second one-way valve 608, both can play a one-way flow guiding role, which can prevent the oil from flowing back and affecting the normal lubrication operation. The surface of the oil spray head 603 is sleeved with the first one-way valve 604;

[0026] The number of the oil spray heads 603 is consistent with the number of the positioning steel balls 7. The flow direction of the second one-way valve 608 is from outside to inside, and the flow direction of the oil spray heads 603 is from inside to outside.

[0027] The right side of the mounting block 4 is provided with a receiving groove for use with the oil storage cylinder 602, and the outer ring of the mounting block 4 is provided with a mounting groove for use with the small pressure gauge 601, the second one-way valve 608 and the oil filling valve 607, and the receiving groove and the mounting groove are in a communicating state;

[0028] A convex block is welded on the right side of the surface of the oil storage cylinder 602, and the surface of the convex block is fixed on the mounting block 4 by screws;

[0029] The detection end of the small pressure gauge 601 penetrates into the inner cavity of the oil storage cylinder 602;

[0030] There are two oil filling valves 607, two second check valves 608 and two small pressure gauges 601. This design makes it convenient for workers to fill oil, steam or observe the pressure value on the left side of the inner cavity of the oil storage cylinder 602.

[0031] In actual application, the end of the oil spray head 603 away from the oil storage cylinder 602 can be replaced by an atomizing nozzle for spraying the lubricating oil liquid in an atomized form to ensure uniform lubrication of the positioning steel ball 7;

[0032] In actual application, in order to ensure overall safety, inert gas can be injected into the oil storage cylinder 602, and the inner wall of the oil storage cylinder 602 can be inlaid with a steel plastic ring to avoid explosion.

[0033] When in use, all components are in the initial installation state, open the oil filling valve 607, and inject a proper amount of lubricating oil into the oil storage cylinder 602 through the oil filling valve 607, and the oil is located on the right side of the sealing plate 606. When it is necessary to lubricate the positioning steel ball 7, the gas injection device is connected to the second one-way valve 608, and the gas injection device is controlled to work, so that the gas passes into the oil storage cylinder 602 and is located on the left side of the sealing plate 606. As the amount of gas injection increases, the air pressure value on the small pressure gauge 601 increases synchronously to push the sealing plate 606 in the storage. The oil cylinder 602 slides to the right, the spring 605 is stretched, and the oil in the oil storage cylinder 602 is unidirectionally sprayed out through the oil spray head 603 and the first one-way valve 604, and multiple positioning steel balls 7 are lubricated synchronously; when it is necessary to re-store oil, the oil filling valve 607 is opened, and the high-pressure gas in the oil storage cylinder 602 is automatically discharged by the oil filling valve 607, and the air pressure indication on the small pressure gauge 601 decreases. Under the action of the spring 605, the sealing plate 606 is automatically reset to the initial state, and the oil filling valve 607 can now perform the oil filling operation again.

[0034] In summary: the constant velocity joint, by providing the mounting block 4 and the homogenizing lubrication mechanism 6, solves the problem that the component is prone to oil waste, and the manual control of lubrication cannot well judge the oil discharge amount, which is prone to over-lubrication or incomplete lubrication, and there are certain restrictive problems.

Claims

1. A constant velocity universal joint, comprising a spherical shell (1), characterized in that: A first transmission shaft (2) is welded at the center of the right side of the spherical shell (1); a star-shaped sleeve (8) is installed on the left side of the inner cavity of the spherical shell (1); a retaining frame (5) is sleeved and installed on the surface of the star-shaped sleeve (8); a positioning steel ball (7) is installed between the retaining frame (5) and the spherical shell (1); a mounting block (4) is installed through the inner cavity of the star-shaped sleeve (8); a homogenizing lubrication mechanism (6) is installed in the inner cavity of the mounting block (4); and a second transmission shaft (3) is welded on the left side of the mounting block (4).

2. A constant velocity universal joint according to claim 1, characterized in that: The homogenizing lubrication mechanism (6) comprises an oil storage cylinder (602) and a small pressure gauge (601); the small pressure gauge (601) is fixedly mounted on the mounting block (4) by means of screws; and the oil storage cylinder (602) is placed inside the mounting block (4).

3. A constant velocity universal joint according to claim 2, characterized in that: A spring (605) is fixedly connected to the left side of the inner cavity of the oil storage cylinder (602), and a sealing plate (606) is fixedly connected to the other end of the spring (605). The outer ring of the sealing plate (606) is in sliding contact with the inner wall of the oil storage cylinder (602) to perform sealing treatment.

4. A constant velocity universal joint according to claim 3, characterized in that: The left side of the inner cavity of the oil storage cylinder (602) is respectively connected to a second one-way valve (608) and an oil injection valve (607); the second one-way valve (608) is located on the left side of the sealing plate (606), and the oil injection valve (607) is located on the right side of the sealing plate (606).

5. A constant velocity universal joint according to claim 4, characterized in that: The right side of the inner cavity of the oil storage cylinder (602) is connected to an oil spray head (603), and a first one-way valve (604) is sleeved and installed on the surface of the oil spray head (603).

6. A constant velocity universal joint according to claim 5, characterized in that: The number of the oil spray heads (603) is consistent with the number of the positioning steel balls (7); the flow direction of the second one-way valve (608) is from outside to inside, and the flow direction of the oil spray heads (603) is from inside to outside.

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