Universal joint with composite structure

Abstract

The utility model provides a universal joint with a composite structure, and belongs to the technical field of universal joints. The problem that in the axial moving process of an existing universal joint, lubricating grease enters a dust cover and leaks, and the service life of the constant velocity universal joint is affected is solved. The universal joint with the composite structure comprises a universal joint body and a shaft rod, a dust cover is arranged between the universal joint body and the shaft rod, a connecting sleeve is arranged on the universal joint body, the lower end of the dust cover is fixedly installed at the upper end of the connecting sleeve, and the upper end of the dust cover is arranged on the shaft rod. A fixing part is integrally arranged at the position, opposite to the connecting sleeve, of the universal joint body, an open groove allowing the connecting sleeve to stretch into is formed in the fixing part, a positioning assembly used for positioning the connecting sleeve is arranged on the fixing part and composed of a positioning rod and a reset spring, and a positioning hole matched with the positioning rod is formed in the connecting sleeve. And a step part is arranged on the inner wall of the connecting sleeve. The universal joint has the advantage that the service life of the universal joint is prolonged.

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 universal joint with a composite structure. Background Art

[0002] The constant velocity universal joint for the mobile end is used in the automotive chassis drive system, and its function is to transmit power and torque between rotating shafts with frequently changing angles and positions. To ensure the normal use of the constant velocity universal joint for the mobile end, a certain amount of grease must be injected into the inner cavity of the universal joint ball track. Therefore, it is necessary to seal the constant velocity universal joint for the mobile end to avoid grease leakage and prevent dust, water, salt, etc. from entering the ball track inner cavity and affecting lubrication. At this time, a dust cover is used.

[0003] During the normal use of the constant velocity universal joint, there are not only rotation and swing, but also axial movement. During the axial movement, the grease will move into the dust cover along with the rotation and axial movement of the constant velocity universal joint. The entry of grease into the dust cover causes grease leakage, reducing the amount of grease inside the constant velocity universal joint, lowering the lubrication effect of the constant velocity universal joint, and affecting the service life of the constant velocity universal joint. Summary of the Invention

[0004] The purpose of the utility model is to provide a universal joint with a composite structure that can improve the service life of the universal joint in view of the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved by the following technical solutions: A universal joint with a composite structure includes a universal joint body and a shaft rod. A dust cover is provided between the universal joint body and the shaft rod. It is characterized in that a connecting sleeve is provided on the universal joint body. The lower end of the dust cover is fixedly installed at the upper end of the connecting sleeve. The upper end of the dust cover is arranged on the shaft rod. A fixing part is integrally provided on the universal joint body at a position relative to the connecting sleeve. A slot for the connecting sleeve to extend into is opened on the fixing part. A positioning component for positioning the connecting sleeve is provided on the fixing part. The positioning component consists of a positioning rod and a return spring. A positioning hole that fits with the positioning rod is opened on the connecting sleeve. A stepped part is provided on the inner wall of the connecting sleeve.

[0006] In the above-mentioned universal joint with a composite structure, an installation groove for installing the positioning component is opened on the fixing part. The positioning rod slides back and forth in the installation groove. A sliding part is provided on the positioning rod relative to the inside of the installation groove. One end of the return spring is connected to the sliding part, and the other end of the return spring is connected to the fixing part. The return spring enables the positioning rod to slide on the installation groove and cooperate with the positioning hole of the connecting sleeve to fixedly install the connecting sleeve on the universal joint body.

[0007] In the above universal joint with a composite structure, a positioning component is provided at the position of each of the fixing parts, and the number of the fixing parts is set to four.

[0008] In the above universal joint with a composite structure, the dust cover provided at the lower end is fixed to the connecting sleeve by a large clamp, a ring groove for fixing the large clamp is provided on the connecting sleeve, and the dust cover provided at the upper end is arranged on the shaft rod by a small clamp.

[0009] Compared with the prior art, in the universal joint with a composite structure of the present invention, a connecting sleeve is provided on the universal joint body, one end of the dust cover is arranged on the connecting sleeve, and a stepped portion is provided on the connecting sleeve, so as to prevent the grease from moving into the dust cover along with the rotation and axial movement of the constant velocity universal joint, and improve the service life of the universal joint. Description of the Drawings

[0010] Figure 1 is a schematic structural view of the present invention.

[0011] Figure 2 is a schematic cross-sectional structural view of the present invention.

[0012] In the figure, 1, universal joint body; 2, shaft rod; 3, dust cover; 4, connecting sleeve; 5, fixing part; 6, slotted opening; 7, positioning rod; 8, return spring; 9, positioning hole; 10, stepped portion; 11, sliding portion; 12, large clamp; 13, small clamp. Detailed Embodiments

[0013] The following are specific embodiments of the present invention in combination with the drawings, and the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0014] Such as Figure 1 、 Figure 2As shown in the figure, the universal joint with a composite structure includes a universal joint body 1 and a shaft rod 2. A dust cover 3 is provided between the universal joint body 1 and the shaft rod 2. The dust cover 3 is made of rubber material. Its characteristic lies in that a connecting sleeve 4 is provided on the universal joint body 1. The lower end of the dust cover 3 is fixedly installed at the upper end of the connecting sleeve 4. The upper end of the dust cover 3 is arranged on the shaft rod 2. A fixing part 5 is integrally provided on the universal joint body 1 at a position relative to the connecting sleeve 4. A slot 6 for the connecting sleeve 4 to extend into is opened on the fixing part 5. A positioning component for positioning the connecting sleeve 4 is provided on the fixing part 5. The positioning component is composed of a positioning rod 7 and a return spring 8. A positioning hole 9 that fits with the positioning rod 7 is opened on the connecting sleeve 4. A stepped part 10 is provided on the inner wall of the connecting sleeve 4. The diameters of the steps in the stepped part 10 are sequentially increased from bottom to top, avoiding the problem that grease will move into the dust cover 3 with the rotation and axial movement of the constant velocity universal joint during the use of the universal joint, reducing the internal grease of the constant velocity universal joint, and improving the service life of the universal joint.

[0015] Further elaborating, an installation groove for installing the positioning component is opened on the fixing part 5. The positioning rod 7 slides in the installation groove. A sliding part 11 is provided on the positioning rod 7 relative to the inside of the installation groove. One end of the return spring 8 is connected to the sliding part 11, and the other end of the return spring 8 is connected to the fixing part 5. Through the return spring 8, the positioning rod 7 slides on the installation groove to cooperate with the positioning hole 9 of the connecting sleeve 4 to fixedly install the connecting sleeve 4 on the universal joint body 1.

[0016] Further elaborating, when the connecting sleeve 4 needs to be disassembled, by pulling the positioning rod 7, the positioning rod 7 contracts into the installation groove, and the positioning rod 7 releases the cooperation with the positioning hole 9 of the connecting sleeve 4, thereby releasing the positioning of the positioning component on the connecting sleeve 4.

[0017] Further elaborating, a positioning component is provided at the position of each fixing part 5, and the number of fixing parts 5 is set to four.

[0018] Further elaborating, the dust cover 3 arranged at the lower end is fixed on the connecting sleeve 4 through a large clamp 12. A ring groove for fixing the large clamp 12 is opened on the connecting sleeve 4. The dust cover 3 arranged at the upper end is arranged on the shaft rod 2 through a small clamp 13.

[0019] The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0020] Although terms such as universal joint body 1, shaft rod 2, dust cover 3, connecting sleeve 4, fixing part 5, slotted groove 6, positioning rod 7, return spring 8, positioning hole 9, stepped part 10, sliding part 11, large clamp 12, small clamp 13, etc. are used more frequently in this text, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A universal joint with a composite structure, comprising a universal joint body (1) and a shaft (2), wherein a dust cover (3) is arranged between the universal joint body (1) and the shaft (2), characterized in that: The universal joint body (1) is provided with a connecting sleeve (4), the lower end of the dust cover (3) is fixedly mounted on the upper end of the connecting sleeve (4), the upper end of the dust cover (3) is arranged on the shaft (2), a fixing portion (5) is integrally provided on the universal joint body (1) at a position relative to the connecting sleeve (4), the fixing portion (5) is provided with a slot (6) for the connecting sleeve (4) to extend therein, a positioning assembly for positioning the connecting sleeve (4) is provided on the fixing portion (5), the positioning assembly is composed of a positioning rod (7) and a return spring (8), a positioning hole (9) is provided on the connecting sleeve (4) and is matched with the positioning rod (7), and a stepped portion (10) is provided on the inner wall of the connecting sleeve (4).

2. A universal joint with a composite structure according to claim 1, characterized in that: The fixing portion (5) is provided with a mounting groove for mounting the positioning assembly, the positioning rod (7) is retracted in the mounting groove, a sliding portion (11) is provided on the positioning rod (7) and relative to the mounting groove, one end of the return spring (8) is connected to the sliding portion (11), and the other end of the return spring (8) is connected to the fixing portion (5), and the return spring (8) enables the positioning rod (7) to slide on the mounting groove so as to cooperate with the positioning hole (9) of the connecting sleeve (4) to fix the connecting sleeve (4) on the universal joint body (1).

3. A universal joint with a composite structure according to claim 1, characterized in that: A positioning component is arranged at the position of each of the fixing parts (5), and the number of the fixing parts (5) is four.

4. A universal joint with a composite structure according to claim 1, characterized in that: The dust cover (3) arranged at the lower end is fixed to the connecting sleeve (4) via a large clamp (12); the connecting sleeve (4) is provided with an annular groove for fixing the large clamp (12); the dust cover (3) arranged at the upper end is arranged on the shaft (2) via a small clamp (13).

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