Tripod mechanism for telescopic constant velocity universal joint

Abstract

The utility model relates to the technical field of automobile parts, and discloses a tripod mechanism for a telescopic constant velocity universal joint, which comprises a transmission shaft, a fixing sleeve is sleeved on the outer surface of the transmission shaft in a sliding manner, a dust cover is fixedly mounted on the outer surface of the fixing sleeve, a fixing mechanism is arranged on the dust cover, and the fixing mechanism is fixed on the transmission shaft. The fixing mechanism comprises a lantern ring, a sealing block, a sliding groove, a spring, a fixing block, a circular ring, two round holes, two round balls, a telescopic shell, a rubber sealing ring, a sealing groove and two clamping holes, the lantern ring is fixedly installed on the left surface of the dust cover, the sliding groove is formed in the outer surface of the lantern ring, the two round holes are formed in the inner wall of the sliding groove, and the spring is arranged in the sliding groove. According to the tripod mechanism for the telescopic constant velocity universal joint, when the tripod assembly and the interior of the telescopic shell need to be overhauled, an operator can manually open the dust cover without an auxiliary tool, and can manually fix the dust cover after overhauling is completed, so that the tripod mechanism is convenient for the operator to use.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically a three-ball pin mechanism for a telescopic constant velocity universal joint. Background Technology

[0002] A universal joint, also known as a universal connector, is a mechanical component that enables power transmission at varying angles. It is used in locations where the direction of the drive shaft needs to be changed. It is a joint component of the universal joint transmission device in an automotive drive system. The combination of a universal joint and a drive shaft is called a universal joint transmission device. The function of a constant velocity universal joint is to connect two shafts that have an included angle or whose relative positions change, and to enable the two shafts to transmit power at the same angular velocity. It can overcome the non-uniform velocity problem of ordinary cross-type universal joints and is particularly suitable for use in steering drive axles.

[0003] Existing constant velocity universal joint drive shaft assemblies include three-ball pin universal joints, ball cage universal joints, and intermediate shafts. The three-ball pin universal joints can achieve axial movement, while the ball cage universal joints can achieve angular rotation. The automotive drive shaft is a mechanism that connects two shafts with non-coincident axes and enables the two shafts to transmit motion at the same angular velocity. Its function is to transmit the engine power from the transmission to the vehicle wheels and meet the requirements of the outer end rotation angle of the vehicle drive shaft.

[0004] Most existing automotive constant velocity joints (CV joints) with three-ball pins are equipped with dust covers. These dust covers are secured using two clamps, bolts, and bolt holes. However, after the bolts are secured to the clamps, the threads are often too long, leaving some bolts exposed. Since automobiles are often used outdoors, these bolts may corrode due to environmental factors. When inspecting the CV joint drive shaft, operators must first use a screwdriver and other auxiliary tools to remove the dust cover. The operation is often cumbersome due to bolt corrosion, requiring the use of tools and preventing manual opening or repositioning. This makes maintenance extremely difficult and inconvenient. Therefore, a three-ball pin mechanism for telescopic constant velocity joints is proposed. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a three-ball pin mechanism for telescopic constant velocity universal joints, which solves the problem of inconvenient disassembly and maintenance of the dust cover of constant velocity universal joints.

[0007] (II) Technical Solution

[0008] To facilitate the disassembly of the dust cover for the constant velocity universal joint and the inspection of its internal structure, this utility model provides the following technical solution: a three-ball pin mechanism for a telescopic constant velocity universal joint, including a drive shaft, a fixed sleeve slidingly sleeved on the outer surface of the drive shaft, and a dust cover fixedly installed on the outer surface of the fixed sleeve.

[0009] The dust cover is equipped with a fixing mechanism, which includes a collar, a sealing block, a sliding groove, a spring, a fixing block, a ring, two round holes, two round balls, a telescopic outer shell, a rubber sealing ring, a sealing groove, and two locking holes.

[0010] Preferably, the collar is fixedly installed on the left surface of the dust cover, and the groove is formed on the outer surface of the collar;

[0011] Two round holes are formed in the inner wall of the groove, and two round beads are respectively set on the inner surface of the two round holes.

[0012] Preferably, the two springs are fixedly installed in the inner wall of the slide groove, and the two fixing blocks are respectively fixedly installed on the right end of the two springs, with the opposite surfaces of the two fixing blocks being inclined.

[0013] The ring is fixedly sleeved on the outer surface of the two fixed blocks, and the ring is slidably connected in the inner wall of the groove.

[0014] Preferably, the sealing block is fixedly installed in the inner wall of the collar.

[0015] Preferably, the telescopic outer shell is located on the left surface of the dust cover, and two locking holes are formed on the outer surface of the telescopic outer shell.

[0016] Preferably, the rubber sealing ring is fixedly installed on the outer surface of the telescopic housing, and the sealing groove is formed on the outer surface of the rubber sealing ring.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a three-ball pin mechanism for telescopic constant velocity universal joints, which has the following beneficial effects:

[0019] 1. The three-ball pin mechanism used in this telescopic constant velocity universal joint allows operators to manually open the dust cover without auxiliary tools when it is necessary to inspect the three-ball pin assembly and the inside of the telescopic housing. After the inspection is completed, the dust cover can be manually fixed, which is convenient for operators.

[0020] 2. The three-ball pin mechanism used in this telescopic constant velocity universal joint uses rubber sealing rings fixedly installed on the outer surface of the telescopic housing to fill the two sides of the sealing block to form a seal at the connection between the telescopic housing and the dust cover, making it difficult for dust to enter the constant velocity universal joint, thus performing dust prevention treatment, ensuring the stable use of the constant velocity universal joint, and reducing interference from external factors. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a three-ball pin mechanism for a telescopic constant velocity universal joint according to the present invention.

[0022] Figure 2 This is a schematic diagram of the dust cover structure of this utility model;

[0023] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0024] Figure 4 This is a schematic diagram of the dust cover structure of this utility model;

[0025] Figure 5 This utility model Figure 4 Enlarged view of the structure at point B in the middle;

[0026] Figure 6 This is a schematic diagram of the telescopic shell structure of this utility model.

[0027] In the diagram: 1. Drive shaft; 2. Dust cover; 3. Fixing sleeve; 4. Collar; 5. Sealing block; 6. Slide groove; 7. Spring; 8. Fixing block; 9. Ring; 10. Round hole; 11. Ball; 12. Telescopic housing; 13. Rubber sealing ring; 14. Sealing groove; 15. Clip hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-6 This utility model provides a new technical solution: a three-ball pin mechanism for a telescopic constant velocity universal joint, including a drive shaft 1, a fixed sleeve 3 is slidably sleeved on the outer surface of the drive shaft 1, and a dust cover 2 is fixedly installed on the outer surface of the fixed sleeve 3.

[0030] The dust cover 2 is equipped with a fixing mechanism, which includes a collar 4, a sealing block 5, a sliding groove 6, a spring 7, a fixing block 8, a ring 9, two round holes 10, two round beads 11, a telescopic outer shell 12, a rubber sealing ring 13, a sealing groove 14, and two locking holes 15.

[0031] Furthermore, the collar 4 is fixedly installed on the left surface of the dust cover 2, and the groove 6 is formed on the outer surface of the collar 4;

[0032] Two circular holes 10 are formed in the inner wall of the groove 6, and two round beads 11 are respectively set on the inner surface of the two circular holes 10.

[0033] Furthermore, two springs 7 are fixedly installed in the inner wall of the slide groove 6, and two fixing blocks 8 are fixedly installed on the right ends of the two springs 7 respectively, with the opposite surfaces of the two fixing blocks 8 being inclined.

[0034] Among them, the ring 9 is fixedly sleeved on the outer surface of the two fixed blocks 8, and the ring 9 is slidably connected in the inner wall of the groove 6.

[0035] Furthermore, the sealing block 5 is fixedly installed in the inner wall of the collar 4.

[0036] Furthermore, the telescopic housing 12 is disposed on the left surface of the dust cover 2, and two snap holes 15 are formed on the outer surface of the telescopic housing 12.

[0037] Furthermore, the rubber sealing ring 13 is fixedly installed on the outer surface of the telescopic housing 12, and the sealing groove 14 is formed on the outer surface of the rubber sealing ring 13;

[0038] The three-ball pin mechanism of this telescopic constant velocity universal joint moves the ring 9 to the left by applying a leftward thrust. Simultaneously, the ring 9 moves the two fixed blocks 8, which are fixedly mounted on its inner surface, to the left. At this time, the two fixed blocks 8 apply pressure to the two springs 7, which are fixedly mounted on the left surface, causing them to contract. The two fixed blocks 8 no longer obstruct the two circular holes 10, i.e., they no longer limit the movement of the two balls 11 inside the two circular holes 10. The telescopic outer shell 12 is then inserted into the inner surface of the dust cover 2, and the two locking holes 15 on the outer surface of the telescopic outer shell 12 are aligned with the two circular holes 10 on the dust cover 2. At this time, the leftward thrust on the ring 9 is no longer applied, and the two springs 7 are no longer under force. The two springs 7 expand, and the two springs 7 are fixed to the right end. The two fixed blocks 8 are pushed to the right, causing them to slide to the right in the inner wall of the slide groove 6. At this time, the inclined surfaces of the two fixed blocks 8 strike the two balls 11 and apply a pushing force to the opposite surfaces of the two balls 11, causing the two balls 11 to move towards the opposite surfaces and engage with the two locking holes 15 opened on the outer surface of the telescopic housing 12 for fixation. At this time, the installation of the constant velocity universal joint is completed. When disassembling it, pushing the ring 9 to the left can release the limit on the balls 11, and the telescopic housing 12 can be pulled out to complete the disassembly. At the same time as installation, the rubber sealing ring 13 fixedly installed on the outer surface of the telescopic housing 12 wraps around the two sides of the sealing block 5 fixedly installed on the inner surface of the collar 4 through the sealing groove 14 opened on the outer surface, which can provide dust protection at the connection between the telescopic housing 12 and the dust cover 2.

[0039] The three-ball pin mechanism used in this telescopic constant velocity universal joint allows operators to manually open the dust cover without auxiliary tools when inspecting the three-ball pin assembly and the interior of the telescopic housing. After the inspection is completed, the dust cover can be manually fixed, which is convenient for operators. The three-ball pin mechanism of this telescopic constant velocity universal joint forms a seal at the connection between the telescopic housing 2 and the dust cover 2 by filling the two sides of the sealing block 15 with the rubber sealing ring 13 fixedly installed on the outer surface of the telescopic housing 2, making it difficult for dust to enter the constant velocity universal joint, thus performing dust prevention treatment, thereby ensuring the stable use of the constant velocity universal joint and reducing the interference of external factors.

[0040] Working principle: The three-ball pin mechanism used in this telescopic constant velocity universal joint moves the ring 9 to the left by applying a leftward thrust. Simultaneously, the ring 9 drives the two fixed blocks 8, which are fixedly mounted on its inner surface, to move to the left. At this time, the two fixed blocks 8 apply pressure to the two springs 7, which are fixedly mounted on the left surface, causing them to contract. The two fixed blocks 8 no longer obstruct the two round holes 10, i.e., they no longer limit the two balls 11 inside the two round holes 10. The telescopic outer shell 12 is then inserted into the inner surface of the dust cover 2, aligning the two locking holes 15 on the outer surface of the telescopic outer shell 12 with the two round holes 10 on the dust cover 2. At this time, the leftward thrust is no longer applied to the ring 9, and the two springs 7 are no longer under force. The two springs 7 expand, and the two springs 7 exert pressure on the right. Two fixed blocks 8 are applied to the right with a rightward push, causing them to slide to the right in the inner wall of the slide groove 6. At this time, the inclined surfaces of the two fixed blocks 8 strike the two balls 11 and apply a push to the opposite surfaces of the two balls 11, causing the two balls 11 to move towards the opposite surfaces and engage with the two locking holes 15 opened on the outer surface of the telescopic housing 12 for fixation. At this time, the installation of the constant velocity universal joint is completed. When disassembling it, pushing the ring 9 to the left can release the limit on the balls 11, and the telescopic housing 12 can be pulled out to complete the disassembly. At the same time as installation, the rubber sealing ring 13 fixedly installed on the outer surface of the telescopic housing 12 wraps around the two sides of the sealing block 5 fixedly installed on the inner surface of the collar 4 through the sealing groove 14 opened on the outer surface, which can provide dust protection at the connection between the telescopic housing 12 and the dust cover 2.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-ball pin mechanism for a telescopic constant velocity universal joint, comprising a drive shaft (1), wherein a fixed sleeve (3) is slidably fitted onto the outer surface of the drive shaft (1), characterized in that: A dust cover (2) is fixedly installed on the outer surface of the fixing sleeve (3); The dust cover (2) is equipped with a fixing mechanism, which includes a collar (4), a sealing block (5), a sliding groove (6), a spring (7), a fixing block (8), a ring (9), two round holes (10), two round beads (11), a telescopic shell (12), a rubber sealing ring (13), a sealing groove (14), and two snap holes (15).

2. The three-ball pin mechanism for a telescopic constant velocity universal joint according to claim 1, characterized in that: The collar (4) is fixedly installed on the left surface of the dust cover (2), and the groove (6) is opened on the outer surface of the collar (4); Two round holes (10) are formed in the inner wall of the groove (6), and two round beads (11) are respectively set on the inner surface of the two round holes (10).

3. The three-ball pin mechanism for a telescopic constant velocity universal joint according to claim 1, characterized in that: Two springs (7) are fixedly installed in the inner wall of the slide (6), and two fixing blocks (8) are fixedly installed at the right ends of the two springs (7) respectively. The opposite surfaces of the two fixing blocks (8) are both set as inclined surfaces. Among them, the ring (9) is fixedly sleeved on the outer surface of the two fixed blocks (8), and the ring (9) is slidably connected in the inner wall of the groove (6).

4. The three-ball pin mechanism for a telescopic constant velocity universal joint according to claim 1, characterized in that: The sealing block (5) is fixedly installed in the inner wall of the collar (4).

5. The three-ball pin mechanism for a telescopic constant velocity universal joint according to claim 1, characterized in that: The telescopic outer shell (12) is located on the left surface of the dust cover (2), and two snap holes (15) are opened on the outer surface of the telescopic outer shell (12).

6. The three-ball pin mechanism for a telescopic constant velocity universal joint according to claim 1, characterized in that: The rubber sealing ring (13) is fixedly installed on the outer surface of the telescopic housing (12), and the sealing groove (14) is opened on the outer surface of the rubber sealing ring (13).

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