CN212775231U

CN212775231U - Cross axle universal joint without needle roller structure

Info

Publication number: CN212775231U
Application number: CN202020217167.4U
Authority: CN
Inventors: 金兄珍; 高天芬; 冯贤
Original assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Current assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2021-03-23
Anticipated expiration: 2030-02-27

Abstract

The utility model discloses a no bearing cup structure cross universal joint mainly includes cross, bearing bowl, sealing washer, axle journal, step, cavity, and the suit bearing bowl on four axle journals of cross, the axle journal root is equipped with the step, and bearing bowl and the step cooperation department of axle journal install the sealing washer and seal, and cooperation department is formed with the cavity and distinguishes as lubricating grease between bearing bowl hole and the axle journal. The top of the shaft neck is provided with a guide section. The bearing bowl inner hole cylindrical surface is matched with the non-full cylindrical surface of the cross shaft journal, and the working area is provided with a lubricating area, so that the lubrication of a matching part is solved, and the heat generated by the movement of the matching part is taken away, so that the lubrication is sufficient, and the operation is flexible; the universal joint pin shaft neck is more beneficial to production and processing, can realize replacing soft turning with cold and warm finish forging, is directly ground or turned hard after heat treatment, and is more beneficial to assembly.

Description

Cross axle universal joint without needle roller structure

Technical Field

The utility model relates to a field of universal joint, concretely relates to no bearing structure cross universal joint.

Background

The prior art publication No. CN2742218 provides a universal joint pin without roller pins, which is simple and convenient to manufacture, process and assemble, light and fast to operate, low in noise and particularly suitable for high speed and light load universal joints. A homogeneous and approximately equal-thickness annular or cylindrical cup-shaped soft wear-resistant layer is arranged between the outer ring of the universal joint and the cross shaft head. The soft wear-resistant layer is formed by coating nylon materials on the inner wall surface and the bottom surface of the outer ring of the cross axle. In some cases, when an annular overtravel groove is obliquely provided between the inner wall surface and the bottom surface of the outer ring, the soft wear-resistant layer is uniformly coated on the inner wall surface, the bottom surface and the overtravel groove therebetween. The near base part of the cross shaft head is provided with an annular groove, and the inner surface of the soft wear-resistant layer is filled in the annular groove. However, the four shaft pins and the bearing bowls of the universal joint cross shaft are matched with each other in a full-cylindrical mode, so that the problems of insufficient lubrication and inflexible rotation exist during operation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a no bearing pin structure cross universal joint.

The purpose of the utility model is accomplished through following technical scheme: the cross-shaped shaft universal joint without the needle roller structure mainly comprises a cross shaft, bearing bowls, sealing rings, shaft necks, steps and cavities, wherein the bearing bowls are sleeved on the four shaft necks of the cross shaft, the steps are arranged at the root parts of the shaft necks, the sealing rings are arranged at the matching parts of the bearing bowls and the steps of the shaft necks for sealing, and the cavities are formed at the matching parts between inner holes of the bearing bowls and the shaft necks and serve as lubricating grease areas.

One dimension D2 of the journal of the spider is smaller than the other perpendicular dimension D1 to form an elliptical cross-section.

The inner hole of the bearing bowl is a cylindrical hole, and the inner diameter of the inner hole and the size D1 of the shaft neck form clearance fit so as to provide conditions for forming a cavity.

The top of the journal is provided with a guide section, and the dimension D3 of the guide section is smaller than the dimension D1 of the journal.

The form of the transition between the guide section and the journal dimension D1 includes R arc, flat and inclined planes.

The utility model has the advantages that: the utility model adopts the matching of the inner hole cylindrical surface of the bearing bowl and the non-full cylindrical surface of the cross axle journal, and the working area is provided with a lubricating area, thus solving the problem of lubrication of the matching part and taking away the heat generated by the movement of the matching part, leading to sufficient lubrication and flexible operation; the universal joint solves the problems that in the existing universal joint without the roller pin, a universal shaft journal and a bearing bowl are matched with each other through a full-cylindrical surface and a full-cylindrical surface, so that insufficient lubrication and inflexible rotation exist during operation; the universal joint pin shaft neck is more beneficial to production and processing, can realize replacing soft turning with cold and warm finish forging, is directly ground or turned hard after heat treatment, and is more beneficial to assembly.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a structural sectional view of the present invention.

Fig. 3 is a sectional view a-a in fig. 1.

Fig. 4 is a front view of the cross axle structure of the present invention.

Fig. 5 is a side view of the cross shaft structure of the present invention.

Fig. 6 is a sectional view taken along line B-B in fig. 3.

Description of reference numerals: the bearing comprises a cross shaft 1, a bearing bowl 2, a sealing ring 3, a shaft neck 4, a step 5, a cavity 6 and a guide section 7.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

example (b): as shown in the attached drawing, the universal joint without the needle roller structure mainly comprises a universal joint shaft 1, a bearing bowl 2, a sealing ring 3, a shaft neck 4, steps 5 and a cavity 6, wherein the bearing bowl 2 is sleeved on four shaft necks 4 of the universal joint shaft 1, the steps 5 are arranged at the root parts of the shaft necks 4, the sealing ring 3 is installed at the matching position of the bearing bowl 2 and the steps 5 of the shaft neck 4 for sealing, the cavity 6 is formed at the matching position between an inner hole of the bearing bowl 2 and the shaft neck 4 and serves as a lubricating grease area, sufficient lubrication is provided for the matching position of the bearing bowl 2 and the shaft neck 4, and heat generated by mutual movement of the universal joint shaft 1 and the bearing bowl. One dimension D2 of journal 4 of cross-shaft 1 is smaller than the other perpendicular dimension D1 to form an elliptical cross-section. The inner bore of the bearing bowl 2 is a cylindrical bore, the inner diameter of which forms a clearance fit with the dimension D1 of the shaft journal 4, providing conditions for the formation of the cavity 6. The top of the shaft journal 4 is provided with a guide section 7, and the dimension D3 of the guide section 7 is smaller than the dimension D1 of the shaft journal 4. The form of the transition of the guide section 7 with the dimension D1 of the journal 4 includes R-arc, flat and inclined planes. This facilitates the assembly guidance of the bearing cup 2 with the cross 1.

It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.

Claims

1. The utility model provides a no bearing pin structure cross universal joint which characterized in that: the bearing mainly comprises a cross shaft (1), bearing bowls (2), sealing rings (3), shaft necks (4), steps (5) and cavities (6), wherein the bearing bowls (2) are sleeved on the four shaft necks (4) of the cross shaft (1), the steps (5) are arranged at the roots of the shaft necks (4), the sealing rings (3) are installed at the matching positions of the bearing bowls (2) and the steps (5) of the shaft necks (4) for sealing, and the cavities (6) are formed at the matching positions between inner holes of the bearing bowls (2) and the shaft necks (4) and serve as lubricating grease areas; one dimension D2 of the journal (4) of the cross-shaft (1) is smaller than the other perpendicular dimension D1 so as to form an elliptical cross-section; the inner hole of the bearing bowl (2) is a cylindrical hole, and the inner diameter of the inner hole and the size D1 of the shaft neck (4) form clearance fit, so that conditions are provided for forming the cavity (6).

2. The needle-free structure cross-pin universal joint as claimed in claim 1, wherein: the top of the journal (4) is provided with a guide section (7), and the dimension D3 of the guide section (7) is smaller than the dimension D1 of the journal (4).

3. The needle-free structure cross-pin universal joint as claimed in claim 2, wherein: the transition between the guide section (7) and the journal (4) in the size D1 comprises an R arc, a plane and a slope.