A tripod equal speed universal joint

Abstract

The utility model discloses a tripod constant velocity universal joint, including outer star wheel and setting inside the inner star wheel of outer star wheel, one end of outer star wheel is installed with first axle stem, one end of inner star wheel is installed with second axle stem, and the outer ring recess of outer star wheel forms the connecting groove of annular structure, and the connecting ring is sleeved on second axle stem, and one end of connecting ring is installed with dustproof positioning sleeve, and the open end of dustproof positioning sleeve is sleeved on the connecting groove, and the both sides of dustproof positioning sleeve are installed with the cover plate through the hinge piece, and the arc slot is equipped on the cover plate all. The utility model discloses simple structure can seal the gap between outer star wheel and inner star wheel through dustproof positioning sleeve, avoids the entry of external dust, still can vertically position first axle stem and second axle stem together, avoids the situation that the supporting leg connected with constant velocity universal joint swings in the process of carrying, and the cover plate can be covered after dustproof positioning sleeve removes from outer star wheel.

Description

Technical Field

[0001] This utility model relates to the field of tripod technology, specifically to a tripod constant velocity universal joint. Background Technology

[0002] A tripod, as the name suggests, is a support with three legs. Its core design goal is to provide an extremely stable and level platform, primarily used to support and secure various equipment to prevent shaking and vibration, thereby obtaining clear and stable results.

[0003] Currently, tripods use constant velocity joints, which are a very important part of tripods. Constant velocity joints can adjust the angle of the tripod legs. However, the current constant velocity joints have a simple structure and lack a sealing structure between the outer and inner star wheels. When not in use, external dust can easily enter the interior, causing abnormal wear of the universal joint. In addition, they lack positioning function, causing the connected legs to swing, which affects subsequent handling. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a tripod constant velocity universal joint with dustproof and positioning functions, so as to solve the problems mentioned in the background art.

[0005] This utility model is achieved through the following technical solution: a tripod constant velocity universal joint, including an outer star wheel and an inner star wheel disposed inside the outer star wheel. A first shaft is installed at one end of the outer star wheel, and a second shaft is installed at one end of the inner star wheel. The outer ring of the outer star wheel is recessed to form a connecting groove with an annular structure. A connecting ring is sleeved on the second shaft. A dustproof positioning sleeve is installed at one end of the connecting ring. The open end of the dustproof positioning sleeve is sleeved on the connecting groove. Cover plates are installed on both sides of the dustproof positioning sleeve through hinges. Each cover plate is provided with an arc-shaped groove.

[0006] As a preferred technical solution, upper positioning blocks are installed on both sides of the outer star wheel facing the cover plate, the other end of the upper positioning block is bent and contacts the surface of the cover plate, and lower positioning blocks are installed on both sides of the dustproof positioning sleeve facing the cover plate, the other end of the lower positioning block is set to contact the bottom surface of the cover plate.

[0007] As a preferred technical solution, the inner wall of the connecting groove is provided with a first external thread, and the inner wall of the opening of the dustproof positioning sleeve is provided with a first internal thread. The dustproof positioning sleeve is connected to the first external thread on the connecting groove through the first internal thread.

[0008] As a preferred technical solution, the inner ring surface of the connecting ring is provided with a second internal thread, and the second shaft is provided with a second external thread that matches the second internal thread.

[0009] As a preferred technical solution, an annular mounting groove is formed by recesses on the inner wall of the connecting groove, and a sealing ring is installed in the mounting groove, with the sealing ring abutting against the end face of the dustproof positioning sleeve.

[0010] As a preferred technical solution, the dustproof positioning sleeve is made of stainless steel.

[0011] As a preferred technical solution, the arc grooves are all designed with a "C" shape, and the arc grooves on both sides combine to form a circular hole that matches the diameter of the second shaft.

[0012] The beneficial effects of this utility model are as follows: This utility model has a simple structure. The dustproof positioning sleeve can seal the gap between the outer star wheel and the inner star wheel, preventing the entry of external dust. It can also vertically position the first shaft and the second shaft together, preventing the support legs connected to the constant velocity universal joint from swinging during the transportation process. After the dustproof positioning sleeve is removed from the outer star wheel, the cover plate can be closed, reducing the probability of external dust entering the interior of the dustproof positioning sleeve and preventing internal dust from entering between the outer star wheel and the inner star wheel after the dustproof positioning sleeve returns to its original position. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model after removing the dustproof positioning sleeve;

[0016] Figure 3 This is a schematic diagram of the structure of the dustproof positioning sleeve of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of this utility model after the cover plate is put on.

[0018] Among them, 1. outer star wheel; 2. dustproof positioning sleeve; 3. connecting ring; 4. first shaft; 5. second shaft; 6. second external thread; 7. cover plate; 8. upper positioning block; 9. inner star wheel; 10. connecting groove; 11. sealing ring; 12. first external thread; 13. first internal thread; 14. lower positioning block. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0021] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0022] like Figures 1-4 As shown, a tripod constant velocity universal joint of this utility model includes an outer star wheel 1 and an inner star wheel 9 disposed inside the outer star wheel 1. A first shaft 4 is installed at one end of the outer star wheel 1, and a second shaft 5 is installed at one end of the inner star wheel 9. The outer ring of the outer star wheel 1 is recessed to form a connecting groove 10 with an annular structure. A connecting ring 3 is sleeved on the second shaft 5. A dustproof positioning sleeve 2 is installed at one end of the connecting ring 3. The open end of the dustproof positioning sleeve 2 is sleeved on the connecting groove 10. Cover plates 7 are installed on both sides of the dustproof positioning sleeve 2 through hinges. Each cover plate 7 is provided with an arc-shaped groove.

[0023] In this embodiment, upper positioning blocks 8 are installed on both sides of the outer star wheel 1 facing the cover plate 7. The other end of the upper positioning block 8 is bent and contacts the surface of the cover plate 7. Lower positioning blocks 14 are installed on both sides of the dustproof positioning sleeve 2 facing the cover plate 7. The other end of the lower positioning block 14 is in contact with the bottom surface of the cover plate 7.

[0024] In this embodiment, the inner wall of the connecting groove 10 is provided with a first external thread 12, and the inner wall of the opening of the dustproof positioning sleeve 2 is provided with a first internal thread 13. The dustproof positioning sleeve 2 is engaged with the first external thread 12 on the connecting groove 10 through the first internal thread 13.

[0025] In this embodiment, the inner ring surface of the connecting ring 3 is provided with a second internal thread, and the second shaft 5 is provided with a second external thread 6 that matches the second internal thread.

[0026] In this embodiment, an annular mounting groove is recessed on the inner wall of the connecting groove 10. A sealing ring 11 is installed in the mounting groove. The sealing ring 11 is set to abut against the end face of the dustproof positioning sleeve 2. The sealing ring is made of rubber material, which increases the sealing between the dustproof positioning sleeve and the outer star wheel.

[0027] In this embodiment, the dustproof positioning sleeve 2 is made of stainless steel, which increases its robustness and prevents rusting.

[0028] In this embodiment, the arc-shaped grooves are all arranged in a "C" shape. The arc-shaped grooves on both sides combine to form a circular hole that matches the diameter of the second shaft 5, so that the cover plate can be smoothly closed, and the arc-shaped grooves can be fitted on both sides of the second shaft.

[0029] When the constant velocity universal joint is not in use, the connecting ring can be pushed upwards. The movement of the connecting ring drives the dustproof positioning sleeve until it is fitted into the connecting groove and threadedly connected to it. The sealing ring increases the sealing between the dustproof positioning sleeve and the outer star wheel, preventing external dust from entering between the outer and inner star wheels. The connecting ring on the dustproof positioning sleeve can position the second shaft, making the second shaft perpendicular to the first shaft, thus preventing rotation during transportation.

[0030] As attached Figure 4 As shown, during use, the dustproof positioning sleeve can be unscrewed from the connecting groove and descend along the second shaft until the connecting ring is threadedly connected to the second shaft. The cover plate is then placed around the hinge (which is a torsion spring hinge, so it can automatically close the cover plate and make the cover plate abut against the open end face of the dustproof positioning sleeve). The cover plate can cover the open end of the dustproof positioning sleeve, preventing external dust from entering and preventing internal dust from entering between the outer and inner star wheels after the dustproof positioning sleeve returns to its original position.

[0031] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A tripod constant velocity joint, characterized by: It includes an outer star wheel (1) and an inner star wheel (9) disposed inside the outer star wheel (1). A first shaft (4) is installed at one end of the outer star wheel (1), and a second shaft (5) is installed at one end of the inner star wheel (9). The outer ring of the outer star wheel (1) is recessed to form a connecting groove (10) with an annular structure. A connecting ring (3) is sleeved on the second shaft (5). A dustproof positioning sleeve (2) is installed at one end of the connecting ring (3). The open end of the dustproof positioning sleeve (2) is sleeved on the connecting groove (10). Cover plates (7) are installed on both sides of the dustproof positioning sleeve (2) through hinges. Arc-shaped grooves are provided on the cover plates (7).

2. The tripod constant velocity joint of claim 1, wherein: The outer star wheel (1) is equipped with upper positioning blocks (8) on both sides facing the cover plate (7). The other end of the upper positioning block (8) is bent and contacts the surface of the cover plate (7). The dustproof positioning sleeve (2) is equipped with lower positioning blocks (14) on both sides facing the cover plate (7). The other end of the lower positioning block (14) is in contact with the bottom surface of the cover plate (7).

3. The tripod constant velocity joint of claim 1, wherein: The inner wall of the connecting groove (10) is provided with a first external thread (12), and the inner wall of the opening of the dustproof positioning sleeve (2) is provided with a first internal thread (13). The dustproof positioning sleeve (2) is engaged with the first external thread (12) on the connecting groove (10) through the first internal thread (13).

4. The tripod constant velocity joint of claim 1, wherein: The inner ring surface of the connecting ring (3) is provided with a second internal thread, and the second shaft (5) is provided with a second external thread (6) that matches the second internal thread.

5. The tripod constant velocity joint of claim 1, wherein: The inner wall of the connecting groove (10) is recessed to form an annular mounting groove. A sealing ring (11) is installed in the mounting groove, and the sealing ring (11) is set to abut against the end face of the dustproof positioning sleeve (2).

6. The tripod universal joint of claim 1, wherein: The dustproof positioning sleeve (2) is made of stainless steel.

7. The tripod universal joint of claim 1, wherein: The arc grooves are all set in a "C" shape, and the arc grooves on both sides are combined to form a circular hole that matches the diameter of the second shaft (5).

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