Dustproof universal joint

Abstract

The utility model provides a dustproof universal joint, and belongs to the technical field of universal joints. The universal joint solves the problems that lubricating oil in an existing universal joint pin type universal joint is prone to leaking outwards, external dust, muddy water and the like are prone to entering the universal joint, and the performance of the whole universal joint is affected. The dustproof universal joint comprises a cross shaft body and two universal joint forks, four shaft ends used for being connected with the universal joint forks are arranged on the cross shaft body, outer rings are arranged on the four shaft ends, roller pins are arranged between the outer rings and the shaft ends, and dustproof covers used for preventing dust are arranged between the outer rings and the shaft ends. The outer ring is provided with a positioning assembly used for positioning the dust cover, the positioning assembly is composed of a positioning rod, a sliding part and a reset spring, the outer ring is provided with an open groove allowing the dust cover to stretch into and be positioned, the outer ring is provided with an installation groove, and the dust cover is provided with a positioning hole. The utility model has the advantages that the service life is prolonged, and the disassembly is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of universal joints and relates to a universal joint, in particular to a dustproof universal joint. Background Art

[0002] Conventional universal joints are categorized as rigid and flexible, depending on whether they exhibit significant flexibility in the torsional direction. Rigid universal joints can be further categorized into three types: non-constant velocity joints (commonly known as cross-axis joints), quasi-constant velocity joints (such as duplex joints), and constant velocity joints (such as ball-and-cage joints).

[0003] Cross-axis rigid universal joints are widely used in automobiles as unequal velocity joints. They consist of a cross shaft, two yokes, and four needle bearings. While they offer advantages such as simple structure and high transmission efficiency, current cross-axis rigid joint oil seals typically utilize conventional annular or V-shaped rings. These seals provide poor sealing performance, allowing lubricant to leak easily and allowing dust, mud, and water to enter the joint, impacting joint performance and reducing its service life. Summary of the Invention

[0004] The purpose of the utility model is to solve the above problems in the prior art and to provide a dustproof universal joint with a longer service life and easy disassembly.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a dust-proof universal joint, comprising a cross-shaft body and two universal joint forks, the cross-shaft body being provided with four shaft ends for connecting with the universal joint forks, characterized in that each of the four shaft ends is provided with an outer ring, a needle roller is provided between the outer ring and the shaft end, a dust cover for dust prevention is provided between the outer ring and the shaft end, a positioning assembly for positioning the dust cover is provided on the outer ring, the positioning assembly is composed of a positioning rod, a sliding part and a return spring, a slot is provided on the outer ring for the dust cover to extend into and position, an installation slot is provided on the outer ring for the positioning assembly to be installed, a positioning hole is provided on the dust cover to cooperate with the positioning rod, the positioning rod is extended and retracted in the installation slot so that it fits with the positioning hole of the dust cover, thereby fixing the dust cover on the outer ring.

[0006] In the above-mentioned dustproof universal joint, the sliding part and the positioning rod are both arranged in the mounting groove, and the sliding part slides in the mounting groove, one end of the positioning rod extends out of the mounting groove and cooperates with the positioning rod, and the other end of the positioning rod extends out of the outer ring and is connected to a lifting part for controlling the positioning rod.

[0007] In the above-mentioned dustproof universal joint, the return spring is arranged between the sliding part and the outer ring, one end of the return spring is connected to the sliding part, and controls the eastern part to slide in the installation groove, thereby driving the positioning rod to extend and retract in the installation groove.

[0008] In the above-mentioned dustproof universal joint, the dust cover is made of rubber material.

[0009] Compared with the existing technology, this dustproof universal joint has a dust cover on the outside of the shaft end to prevent external dust from entering between the shaft end and the outer ring and affecting the operation of the universal joint. The dust cover is positioned by a positioning assembly, which is convenient for disassembly of the dust cover and maintenance of the internal part of the universal joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the present utility model.

[0011] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model.

[0012] In the figure, 1. cross shaft body; 2. universal joint fork; 3. shaft end; 4. outer ring; 5. needle roller; 6. dust cover; 7. positioning assembly; 8. positioning rod; 9. sliding part; 10. return spring; 11. positioning hole; 12. pulling part. DETAILED DESCRIPTION

[0013] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0014] like Figure 1 、 Figure 2 As shown, the dustproof universal joint comprises a cross shaft body 1 and two universal joint forks 2, the two universal joint forks 2 are respectively arranged on both sides of the cross shaft body 1, the cross shaft body 1 is provided with four shaft ends 3 for connecting with the universal joint forks 2, the four shaft ends 3 are each provided with an outer ring 4, a needle roller 5 is provided between the outer ring 4 and the shaft end 3, a dust cover 6 for dust prevention is provided between the outer ring 4 and the shaft end 3, a positioning assembly 7 for positioning the dust cover 6 is provided on the outer ring 4, the positioning assembly 7 is composed of a positioning rod 8, a sliding part 9 and a return spring 10, a slot is provided on the outer ring 4 for the dust cover 6 to extend into and position, a mounting groove is provided on the outer ring 4 for the positioning assembly 7 to be installed, a positioning hole 11 is provided on the dust cover 6 to cooperate with the positioning rod 8, the positioning rod 8 is retracted in the mounting groove so that it fits with the positioning hole 11 of the dust cover 6, thereby fixing the dust cover 6 on the outer ring 4,

[0015] To be more specific, the sliding portion 9 and the positioning rod 8 are both arranged in the mounting groove, and the sliding portion 9 slides in the mounting groove, one end of the positioning rod 8 extends out of the mounting groove and cooperates with the positioning rod 8, and the other end of the positioning rod 8 extends out of the outer ring 4 and is connected to a lifting portion 12 for controlling the positioning rod 8.

[0016] To be more specific, the return spring 10 is arranged between the sliding part 9 and the outer ring 4. One end of the return spring 10 is connected to the sliding part 9, and controls the East China to slide in the installation groove, thereby driving the positioning rod 8 to extend and retract in the installation groove.

[0017] To explain in further detail, the dust cover 6 is now sleeved on the shaft end 3. When the outer ring 4 is installed, by pulling the lifting portion 12 extending out of the outer ring 4, the return spring 10 is compressed, causing the positioning rod 8 to shrink into the installation groove. When the outer ring 4 is installed, by loosening the lifting portion 12, the return spring 10 rebounds, so that the positioning rod 8 fits into the positioning hole 11 on the dust cover 6, thereby fixing the dust cover 6 on the outer ring 4.

[0018] To be more specific, the dust cover 6 is made of rubber material.

[0019] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0020] Although this document frequently uses terms such as the cross shaft body 1, universal joint yoke 2, shaft end 3, outer ring 4, needle roller 5, dust cover 6, positioning assembly 7, positioning rod 8, sliding portion 9, return spring 10, positioning hole 11, and lifting portion 12, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A dustproof universal joint, comprising a cross shaft body (1) and two universal joint forks (2), wherein the cross shaft body (1) is provided with four shaft ends (3) for connecting with the universal joint forks (2), characterized in that: Each of the four shaft ends (3) is provided with an outer ring (4), a needle roller (5) is provided between the outer ring (4) and the shaft end (3), a dust cover (6) for dust prevention is provided between the outer ring (4) and the shaft end (3), a positioning assembly (7) for positioning the dust cover (6) is provided on the outer ring (4), the positioning assembly (7) is composed of a positioning rod (8), a sliding part (9) and a return spring (10), a slot for the dust cover (6) to extend into and be positioned is provided on the outer ring (4), a mounting slot for the positioning assembly (7) to be installed is provided on the outer ring (4), a positioning hole (11) matched with the positioning rod (8) is provided on the dust cover (6), the positioning rod (8) is extended and retracted in the mounting slot so as to fit into the positioning hole (11) of the dust cover (6) so as to fix the dust cover (6) on the outer ring (4).

2. The dustproof universal joint according to claim 1, characterized in that: The sliding portion (9) and the positioning rod (8) are both arranged in the installation groove, and the sliding portion (9) slides in the installation groove, one end of the positioning rod (8) extends out of the installation groove and cooperates with the positioning rod (8), and the other end of the positioning rod (8) extends out of the outer ring (4) and is connected to a lifting portion (12) for controlling the positioning rod (8).

3. The dustproof universal joint according to claim 1, characterized in that: The reset spring (10) is arranged between the sliding part (9) and the outer ring (4), one end of the reset spring (10) is connected to the sliding part (9), and controls the East China to slide in the installation groove, thereby driving the positioning rod (8) to extend and retract in the installation groove.

4. The dustproof universal joint according to claim 1, characterized in that: The dust cover (6) is made of rubber material.

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