Cross universal joint convenient to disassemble and assemble

Abstract

The utility model relates to the field of universal joint devices, and discloses a cross universal joint convenient to disassemble and assemble, which comprises four protection devices and a cross shaft, four oil seal main bodies are arranged on the side wall of the cross shaft, the four protection devices are arranged on the side wall of the cross shaft, and each protection device comprises four shaft heads. A plurality of roller pins are circumferentially arrayed on the side walls of the four shaft heads, second through holes are formed in the middles of the four shaft heads respectively, bearing outer rings are arranged on the side walls of the four shaft heads respectively, mounting blocks are fixedly connected to the bottom ends of the four bearing outer rings respectively, first through holes are formed in the middles of the four bearing outer rings respectively, and second through holes are formed in the middles of the first through holes respectively. The four shaft heads are fixedly connected with the side wall of the cross shaft. According to the cross universal joint convenient to disassemble and assemble, the overall disassembly and assembly convenience of the cross universal joint is effectively improved through the arrangement of the protection device, and meanwhile the overall leakproofness of the cross universal joint is further effectively improved through the oil seal body.

Description

Technical Field

[0001] The utility model relates to the field of universal joint devices, in particular to a cross universal joint which is convenient for disassembly and assembly. Background Art

[0002] The universal joint cross shaft, namely the universal joint, is a mechanical part for realizing power transmission at a variable angle and is used for positions where the transmission axis direction needs to be changed. It is the "joint" part of the universal transmission device of the vehicle drive system. The combination of the universal joint cross shaft and the transmission shaft is called the universal joint cross shaft transmission device. On a vehicle with a front-mounted engine and rear-wheel drive, the universal joint cross shaft transmission device is installed between the output shaft of the transmission and the input shaft of the main reducer of the drive axle; while on a vehicle with a front-mounted engine and front-wheel drive, the transmission shaft is omitted, and the universal joint cross shaft is installed between the front axle half shaft responsible for both driving and steering and the wheel.

[0003] Although the prior art changes the position of the transmission shaft system by using a cross universal joint, but during installation, interference fit is usually used to prevent the problem of falling off, which results in inconvenient disassembly and assembly. Therefore, those skilled in the art provide a cross universal joint which is convenient for disassembly and assembly to solve the problems raised in the above background art. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantages existing in the prior art, and to propose a cross universal joint which is convenient for disassembly and assembly, and provide a cross universal joint which is convenient for disassembly and assembly by setting a protection device to effectively improve the disassembly and assembly convenience of the whole device, and at the same time using the oil seal body to effectively further improve the airtightness of the whole device.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a cross universal joint which is convenient for disassembly and assembly, including four protection devices, four oil seal bodies and a cross shaft. The four oil seal bodies are arranged on the side wall of the cross shaft, the four protection devices are arranged on the side wall of the cross shaft. The four protection devices respectively include four shaft heads. A number of needle rollers are respectively arranged in a circumferential array on the side walls of the four shaft heads. Second through holes are respectively opened in the middle parts of the four shaft heads. Bearing outer rings are respectively arranged on the side walls of the four shaft heads. Installation blocks are respectively fixedly connected to the bottoms of the four bearing outer rings. First through holes are respectively opened in the middle parts of the four bearing outer rings. The four shaft heads are respectively fixedly connected to the side wall of the cross shaft;

[0006] Through the above technical solution, by setting the protection device, the bearing outer ring is arranged outside the needle roller, and the installation block is arranged at the bottom of the bearing outer ring, so that the cross universal joint has good sealing performance during use. At the same time, the bearing outer ring is fixed on the cross shaft by a clamping method, which has the advantages of reasonable structure, simple processing, convenient disassembly and assembly, etc.

[0007] Further, the four oil seal bodies respectively include retaining rings, annular grooves are respectively formed in the middle parts of the four retaining rings, rubber rings are respectively rotatably connected to the inner side walls of the four annular grooves, and the four retaining rings are respectively rotatably connected to the side walls of the four shaft heads;

[0008] Through the above technical solution, by setting the oil seal body, an annular groove is arranged in the middle of the retaining ring, and a rubber ring is arranged in the middle of the annular groove, so as to further improve the sealing performance during use by using the rubber ring.

[0009] Further, several of the needle rollers are respectively slidably connected to the inner side wall of the outer ring of the bearing;

[0010] Through the above technical solution, the friction force during the overall rotation of the device is effectively reduced.

[0011] Further, the four mounting blocks are respectively slidably connected to the side walls of the four retaining rings;

[0012] Through the above technical solution, the convenience during disassembly and assembly is effectively improved.

[0013] Further, the four rubber rings are respectively in contact with the inner side walls of the four mounting blocks;

[0014] Through the above technical solution, the overall sealing performance of the device is effectively improved.

[0015] Further, the four first through holes and the four second through holes are coaxially arranged;

[0016] Through the above technical solution, it is convenient to install the whole device.

[0017] Further, the four protection devices are arranged in a circumferential array on the side wall of the cross shaft;

[0018] Through the above technical solution, the stability during the use of the device is effectively improved.

[0019] Further, the bottoms of the four outer rings of the bearings are respectively adapted to the tops of the four retaining rings;

[0020] Through the above technical solution, the outer ring of the bearing is effectively installed.

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

[0022] 1. In the utility model, by setting the protection device, arranging the outer ring of the bearing outside the needle roller, and arranging the mounting block at the bottom end of the outer ring of the bearing, the cross universal joint has good sealing performance during use. At the same time, the outer ring of the bearing is fixed on the cross shaft by a clamping method, which has the advantages of reasonable structure, simple processing, convenient disassembly and assembly, etc.

[0023] 2. In the present utility model, by providing an oil seal main body, a ring groove is provided in the middle of the retaining ring, and a rubber ring is provided in the middle of the ring groove, so as to further improve the tightness during use by means of the rubber ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is a perspective view of a cross universal joint that is convenient for disassembly and assembly proposed by the present utility model;

[0025] Figure 2 FIG. is a perspective view of the oil seal main body of a cross universal joint that is convenient for disassembly and assembly proposed by the present utility model;

[0026] Figure 3 FIG. is a sectional view of a cross universal joint that is convenient for disassembly and assembly proposed by the present utility model;

[0027] Figure 4 is Figure 3 the enlarged view at A in

[0028] Legend:

[0029] 1. Protection device; 101. Outer ring of bearing; 102. Needle roller; 103. Shaft head; 104. Mounting block; 105. First through hole; 106. Second through hole; 2. Oil seal main body; 201. Retaining ring; 202. Ring groove; 203. Rubber ring; 3. Cross shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Refer to Figures 1-4, an embodiment provided by the present utility model: a cross universal joint that is convenient for disassembly and assembly, including four protective devices 1, four oil seal bodies 2 and a cross shaft 3. The four oil seal bodies 2 are arranged on the side wall of the cross shaft 3, and the four protective devices 1 are arranged on the side wall of the cross shaft 3. The four protective devices 1 respectively include four shaft heads 103. A number of needle rollers 102 are respectively arranged in a circumferential array on the side walls of the four shaft heads 103. Second through holes 106 are respectively opened in the middle parts of the four shaft heads 103. Bearing outer rings 101 are respectively arranged on the side walls of the four shaft heads 103. Mounting blocks 104 are respectively fixedly connected to the bottoms of the four bearing outer rings 101. First through holes 105 are respectively opened in the middle parts of the four bearing outer rings 101. The four shaft heads 103 are respectively fixedly connected to the side wall of the cross shaft 3. By providing the protective device 1, the bearing outer ring 101 is arranged outside the needle roller 102, and the mounting block 104 is arranged at the bottom of the bearing outer ring 101, so that the cross universal joint has good sealing performance during use. At the same time, the bearing outer ring 101 is fixed on the cross shaft 3 by a clamping method, which has the advantages of reasonable structure, simple processing, convenient disassembly and assembly, etc.

[0032] The four oil seal bodies 2 respectively include retaining rings 201. Ring grooves 202 are respectively opened in the middle parts of the four retaining rings 201. Rubber rings 203 are respectively rotatably connected to the inner side walls of the four ring grooves 202. The four retaining rings 201 are respectively rotatably connected to the side walls of the four shaft heads 103. By providing the oil seal body 2, the ring groove 202 is arranged in the middle of the retaining ring 201, and the rubber ring 203 is arranged in the middle of the ring groove 202, and the rubber ring 203 is used to further improve the tightness during use.

[0033] A number of needle rollers 102 are respectively slidably connected to the inner side walls of the bearing outer rings 101. The four mounting blocks 104 are respectively slidably connected to the side walls of the four retaining rings 201. The four rubber rings 203 are respectively in contact with the inner side walls of the four mounting blocks 104. The four first through holes 105 and the four second through holes 106 are coaxially arranged. The four protective devices 1 are arranged in a circumferential array on the side wall of the cross shaft 3. The bottoms of the four bearing outer rings 101 respectively match the tops of the four retaining rings 201.

[0034] Working principle: By providing the protective device 1, the bearing outer ring 101 is arranged outside the needle roller 102, and the mounting block 104 is arranged at the bottom of the bearing outer ring 101, so that the cross universal joint has good sealing performance during use. At the same time, the bearing outer ring 101 is fixed on the cross shaft 3 by a clamping method, which has the advantages of reasonable structure, simple processing, convenient disassembly and assembly, etc. By providing the oil seal body 2, the ring groove 202 is arranged in the middle of the retaining ring 201, and the rubber ring 203 is arranged in the middle of the ring groove 202, and the rubber ring 203 is used to further improve the tightness during use.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cross universal joint that is easy to disassemble and assemble, comprising four protective devices (1), four oil seal bodies (2) and a cross shaft (3), wherein the four oil seal bodies (2) are arranged on the side walls of the cross shaft (3), and the four protective devices (1) are arranged on the side walls of the cross shaft (3), characterized in that: The four protection devices (1) respectively include four shaft heads (103), the side walls of the four shaft heads (103) are respectively provided with a plurality of roller needles (102) in a circumferential array, the middle of the four shaft heads (103) are respectively provided with a second through hole (106), the side walls of the four shaft heads (103) are respectively provided with a bearing outer ring (101), the bottom ends of the four bearing outer rings (101) are respectively fixedly connected with a mounting block (104), the middle of the four bearing outer rings (101) are respectively provided with a first through hole (105), and the four shaft heads (103) are respectively fixedly connected to the side walls of the cross shaft (3).

2. The cross universal joint that is easy to disassemble and assemble according to claim 1, characterized in that: The four oil seal bodies (2) respectively comprise retaining rings (201), the middle parts of the four retaining rings (201) are respectively provided with annular grooves (202), the inner side walls of the four annular grooves (202) are respectively rotatably connected with rubber rings (203), and the four retaining rings (201) are respectively rotatably connected to the side walls of four shaft heads (103).

3. The cross universal joint that is easy to disassemble and assemble according to claim 1, characterized in that: The plurality of needle rollers (102) are respectively slidably connected to the inner side wall of the bearing outer ring (101).

4. The cross universal joint that is easy to disassemble and assemble according to claim 1, characterized in that: The four mounting blocks (104) are respectively slidably connected to the side walls of the four retaining rings (201).

5. The cross universal joint that is easy to disassemble and assemble according to claim 2, characterized in that: The four rubber rings (203) are in contact with the inner side walls of the four mounting blocks (104) respectively.

6. The cross universal joint that is easy to disassemble and assemble according to claim 1, characterized in that: The four first through holes (105) and the four second through holes (106) are coaxially arranged.

7. The cross universal joint that is easy to disassemble and assemble according to claim 1, characterized in that: The four protection devices (1) are arranged in a circular array with the side wall of the cross shaft (3).

8. The cross universal joint that is easy to disassemble and assemble according to claim 1, characterized in that: The bottom ends of the four bearing outer rings (101) are respectively matched with the top ends of the four retaining rings (201).

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