Tripod constant velocity universal joint

Abstract

The utility model relates to the technical field of constant velocity universal joints, and discloses a tripod type constant velocity universal joint which comprises a tripod type universal joint and a lantern type universal joint, an intermediate shaft is connected between the tripod type universal joint and the lantern type universal joint, the tripod type universal joint is sleeved with a protective shell, and the protective shell is connected with the lantern type universal joint. A lubricating mechanism is fixedly arranged at the upper end of the protective shell, a dust cover is fixedly connected to the side, close to the middle shaft, of the protective shell, a heat dissipation mechanism is detachably arranged on one side of the dust cover, the lubricating mechanism comprises an oil storage tank fixedly arranged at the upper end of the protective shell, and an air inlet hole is formed in the middle of the upper end of the oil storage tank; a pull rod is movably arranged at the upper end of the oil storage tank and located in the air inlet, the lower end of the pull rod penetrates through the air inlet and is fixedly connected with a sealing plate, and the outer wall of the pull rod is sleeved with a spring. According to the dustproof cover, heat dissipation can be conducted in the using process, the problem that the dustproof cover is broken is effectively solved, and the service life of the dustproof cover is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of constant velocity universal joint technology, and in particular to a three-ball pin type constant velocity universal joint. Background Technology

[0002] Vehicles have necessary vibration and noise regulations, which require improved GAF ​​and NVH performance. The drive shaft assembly, which transmits the output power of the vehicle's transmission to the drive wheels, is also one of the components that induce vibration and noise. The noise and vibration of the drive shaft need to be regulated within the desired range. The drive shaft assembly consists of a drive shaft and constant velocity joints on both sides. The constant velocity joint on the transmission side is called the inner constant velocity joint, and the constant velocity joint on the drive wheel side is called the outer constant velocity joint. The inner constant velocity joint primarily uses a three-ball-pin type constant velocity joint capable of axial displacement.

[0003] Most existing three-ball pin constant velocity universal joints use a dust cover to connect the universal joint housing and the intermediate shaft to seal the universal joint from dust. However, the dust cover is usually made of rubber, which often cracks due to the heat generated during the use of the universal joint, thus reducing its service life.

[0004] Therefore, those skilled in the art have provided a three-ball pin constant velocity universal joint to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a three-ball pin constant velocity universal joint. This device can dissipate heat during use, effectively preventing dust cover breakage and extending its service life.

[0006] To achieve the above objectives, this utility model provides a three-ball pin type constant velocity universal joint, including...

[0007] A three-ball pin type constant velocity universal joint includes a three-ball universal joint and a lantern-type universal joint. An intermediate shaft connects the three-ball universal joint and the lantern-type universal joint. A protective shell is fitted over the three-ball universal joint. A lubrication mechanism is fixedly installed on the upper end of the protective shell. A dust cover is fixedly connected to the side of the protective shell near the intermediate shaft. A heat dissipation mechanism is detachably installed on one side of the dust cover.

[0008] The lubrication mechanism includes an oil tank fixedly installed on the upper part of the protective shell. An air inlet is provided in the middle of the upper part of the oil tank. A pull rod is movably installed on the upper part of the oil tank and inside the air inlet. The lower end of the pull rod passes through the air inlet and is fixedly connected to a sealing plate. A spring is sleeved on the outer wall of the pull rod.

[0009] Furthermore, the heat dissipation mechanism includes a fixed ring and a collar. The fixed ring is fixedly disposed on one side of the dust cover, and the collar is sleeved on the intermediate shaft. An installation ring is detachably disposed inside the fixed ring, and a breathable mesh is disposed between the installation ring and the collar.

[0010] The above technical solution allows for heat dissipation during the use of the universal joint through a heat dissipation mechanism, effectively preventing dust cover breakage and extending its service life.

[0011] Furthermore, the inner wall of the fixing ring is provided with an internal thread, the outer wall of the mounting ring is provided with an external thread, and the mounting ring is connected to the inside of the fixing ring through the external thread;

[0012] The above technical solution allows the mounting ring to be disassembled and reassembled, thus enabling the replacement of the breathable mesh.

[0013] Furthermore, a handle is fixedly connected to the upper end of the pull rod;

[0014] The above technical solution allows the lever to move downwards by pressing the handle.

[0015] Furthermore, the lubrication mechanism also includes multiple oil outlets, which are equidistantly located at the lower ends of both sides of the oil reservoir. Each of the multiple oil outlets is fixedly connected to an oil guide pipe at its outer end, and the lower ends of the multiple oil guide pipes penetrate the oil reservoir and extend into its interior.

[0016] The above technical solution allows lubricating oil to flow into the protective housing through the oil outlet and oil guide pipe, thereby lubricating the universal joint.

[0017] Furthermore, a refueling pipe is fixedly connected to one side of the upper end of the oil storage tank;

[0018] The above technical solution allows lubricating oil to be replenished into the oil storage tank via a refueling pipe.

[0019] Furthermore, the upper surface of the sealing plate has the same curvature as the upper surface of the inner wall of the oil tank;

[0020] The above technical solution seals the air intake by fitting the sealing plate to the oil tank.

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

[0022] 1. The present invention proposes a three-ball pin type constant velocity universal joint. This device adds a heat dissipation mechanism to the dust cover, which solves the problem of airtight sealed dust covers in the prior art. It prevents the universal joint from cracking due to insufficient heat dissipation after long-term use, and improves its service life.

[0023] 2. The present invention proposes a three-ball pin type constant velocity universal joint. This device can conveniently add lubricating oil to the inside of the universal joint through a lubrication mechanism, without requiring the user to disassemble the protective shell first, thus improving its convenience and practicality. Attached Figure Description

[0024] Figure 1 This is a perspective view of a three-ball pin type constant velocity universal joint proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the lubrication mechanism of a three-ball pin constant velocity universal joint proposed in this utility model;

[0026] Figure 3 This is a schematic diagram of the disassembled structure of the sealing plate of a three-ball pin constant velocity universal joint proposed in this utility model.

[0027] Figure 4 for Figure 1 Enlarged view of point A in the middle;

[0028] Figure 5 This is a schematic diagram of a heat dissipation mechanism for a three-ball pin type constant velocity universal joint proposed in this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Three-ball universal joint; 2. Lantern-type universal joint; 3. Intermediate shaft; 4. Protective housing; 5. Lubrication mechanism; 51. Oil reservoir; 52. Air inlet; 53. Tie rod; 54. Sealing plate; 55. Spring; 56. Handle; 57. Oil filling pipe; 58. Oil outlet; 59. Oil guide pipe; 6. Dust cover; 7. Cooling mechanism; 71. Retaining ring; 72. Collar; 73. Internal thread; 74. Mounting ring; 75. External thread; 76. Vent mesh. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Reference Figure 1-4This utility model provides a specific embodiment: a three-ball pin type constant velocity universal joint, including a three-ball universal joint 1 and a lantern-type universal joint 2, with an intermediate shaft 3 connecting the three-ball universal joint 1 and the lantern-type universal joint 2, a protective shell 4 covering the outside of the three-ball universal joint 1, a lubrication mechanism 5 fixedly installed on the upper end of the protective shell 4, a dust cover 6 fixedly connected to the side of the protective shell 4 near the intermediate shaft 3, and a heat dissipation mechanism 7 detachably installed on one side of the dust cover 6;

[0033] Lubrication mechanism 5 includes an oil tank 51 fixedly installed on the upper end of protective shell 4. An air inlet 52 is provided in the middle of the upper end of the oil tank 51. A pull rod 53 is movably installed on the upper end of the oil tank 51 and inside the air inlet 52. The lower end of the pull rod 53 passes through the air inlet 52 and is fixedly connected to a sealing plate 54. A spring 55 is sleeved on the outer wall of the pull rod 53.

[0034] A handle 56 is fixedly connected to the upper end of the lever 53. Pressing the handle 56 causes the lever 53 to move downward.

[0035] The lubrication mechanism 5 also includes multiple oil outlets 58, which are equidistantly located at the lower ends of both sides of the oil reservoir 51. Each of the multiple oil outlets 58 has an oil guide pipe 59 fixedly connected to its outer end. The lower ends of the multiple oil guide pipes 59 penetrate the oil reservoir 51 and extend into its interior. Lubricating oil flows into the protective housing 4 through the oil outlets 58 and the oil guide pipes 59, thereby lubricating the universal joint.

[0036] A refueling pipe 57 is fixedly connected to one side of the upper end of the oil storage tank 51, and lubricating oil is added to the oil storage tank 51 through the refueling pipe 57.

[0037] The upper end face of the sealing plate 54 has the same curvature as the upper end of the inner wall of the oil tank 51. The air inlet 52 is sealed by the fit between the sealing plate 54 and the oil tank 51.

[0038] Reference Figure 1 and 5 The heat dissipation mechanism 7 includes a fixed ring 71 and a collar 72. The fixed ring 71 is fixedly installed on one side of the dust cover 6, and the collar 72 is sleeved on the intermediate shaft 3. The fixed ring 71 has a detachable mounting ring 74 inside, and a vent mesh 76 is provided between the mounting ring 74 and the collar 72. The heat dissipation mechanism 7 can dissipate heat during the use of the universal joint, effectively preventing the dust cover 6 from cracking and improving its service life.

[0039] The inner wall of the fixing ring 71 is provided with an internal thread 73, and the outer wall of the mounting ring 74 is provided with an external thread 75. The mounting ring 74 is connected to the inside of the fixing ring 71 through the external thread 75, so that the mounting ring 74 can be disassembled and installed, thereby replacing the breathable mesh 76.

[0040] Working principle: When using this three-ball pin constant velocity universal joint, the universal joint will generate heat during prolonged use. This heat is dissipated through the vent mesh 76 on one side of the dust cover 6, improving the service life of the dust cover 6. When adding lubricating oil to the universal joint, pressing the handle 56 causes the sealing plate 54 to disengage from the air inlet 52. At this time, external air enters the oil reservoir 51, and the lubricating oil inside flows downward and enters the protective shell 4 through the oil guide pipe 59 to lubricate the universal joint. When the handle 56 is released, the spring 55 returns to its original position, driving the pull rod 53 upward, so that the sealing plate 54 fits against the air inlet 52, blocking external air from entering the oil reservoir 51, thus ending the lubricating oil addition.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A three-ball pin type constant velocity universal joint, comprising a three-ball universal joint (1) and a lantern-type universal joint (2), characterized in that: An intermediate shaft (3) is connected between the three-ball universal joint (1) and the lantern universal joint (2). A protective shell (4) is fitted on the outside of the three-ball universal joint (1). A lubrication mechanism (5) is fixedly installed on the upper end of the protective shell (4). A dust cover (6) is fixedly connected to the side of the protective shell (4) near the intermediate shaft (3). A heat dissipation mechanism (7) is detachably installed on one side of the dust cover (6). The lubrication mechanism (5) includes an oil tank (51) fixedly installed on the upper end of the protective shell (4). An air inlet (52) is provided in the middle of the upper end of the oil tank (51). A pull rod (53) is movably installed on the upper end of the oil tank (51) and inside the air inlet (52). The lower end of the pull rod (53) passes through the air inlet (52) and is fixedly connected to a sealing plate (54). A spring (55) is sleeved on the outer wall of the pull rod (53).

2. The three-ball pin type constant velocity universal joint according to claim 1, characterized in that: The heat dissipation mechanism (7) includes a fixed ring (71) and a collar (72). The fixed ring (71) is fixedly disposed on one side of the dust cover (6). The collar (72) is sleeved on the intermediate shaft (3). An installation ring (74) is detachably disposed inside the fixed ring (71). A breathable mesh (76) is disposed between the installation ring (74) and the collar (72).

3. A three-ball pin type constant velocity universal joint according to claim 2, characterized in that: The inner wall of the fixing ring (71) is provided with an internal thread (73), and the outer wall of the mounting ring (74) is provided with an external thread (75). The mounting ring (74) is connected to the inside of the fixing ring (71) through the external thread (75).

4. A three-ball pin type constant velocity universal joint according to claim 1, characterized in that: A handle (56) is fixedly connected to the upper end of the pull rod (53).

5. A three-ball pin type constant velocity universal joint according to claim 1, characterized in that: The lubrication mechanism (5) also includes multiple oil outlets (58), which are equidistantly located at the lower ends of both sides of the oil reservoir (51). Each of the multiple oil outlets (58) is fixedly connected to an oil guide pipe (59) at its outer end, and the lower ends of the multiple oil guide pipes (59) penetrate the oil reservoir (51) and extend into its interior.

6. A three-ball pin type constant velocity universal joint according to claim 1, characterized in that: A refueling pipe (57) is fixedly connected to one side of the upper end of the oil storage tank (51).

7. A three-ball pin type constant velocity universal joint according to claim 1, characterized in that: The upper surface of the sealing plate (54) has the same curvature as the upper surface of the inner wall of the oil storage tank (51).

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