CN216768140U

CN216768140U - Turn to low friction universal joint structure for jackshaft

Info

Publication number: CN216768140U
Application number: CN202220198984.9U
Authority: CN
Inventors: 周裕; 王吉成; 王瑞; 张大亮
Original assignee: Jilin Shibao Machinery Manufacturing Co ltd
Current assignee: Jilin Shibao Machinery Manufacturing Co ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-06-17
Anticipated expiration: 2032-01-25

Abstract

The utility model relates to a low-friction universal joint structure for a steering intermediate shaft. The universal joint comprises an outer joint fork, an inner joint fork, a cross shaft and a needle bearing, wherein the outer joint fork and the inner joint fork are connected through the cross shaft and the needle bearing, the cross shaft comprises a central shaft body, four shaft heads are designed on the periphery of the central shaft body, the needle bearing is installed between the four shaft heads and the inner joint fork or the outer joint fork, the end parts of the shaft heads are spherical surfaces, one sides of the needle bearings, which are in contact with the end parts of the shaft heads, are flat surfaces, and the end parts of the shaft heads are in point contact with the needle bearing. This application jackshaft is through changing cross axle and bearing cooperation type, changes the face contact into the point contact, greatly reduced the running friction of universal joint, reduced jackshaft no-load moment.

Description

Turn to low friction universal joint structure for jackshaft

Technical Field

The utility model relates to a universal joint structure, in particular to a low-friction universal joint structure for a steering intermediate shaft.

Background

The steering intermediate shaft comprises a middle shaft tube and universal joints at two ends, the steering column and the steering gear are respectively connected through the universal joints at the two ends, and the steering intermediate shaft is a transmission mechanism for connecting the steering column and the steering gear. The universal joint is a part for realizing variable angle power transmission, is used for changing the position of the direction of a transmission axis, and is a joint part of a universal transmission device of an automobile driving system. As shown in fig. 5 to 7, the universal joint is formed by connecting an inner yoke, an outer yoke, a middle cross shaft and a needle bearing, the end surface of the head of the cross shaft in the conventional structure is a plane, the contact part of the head and the needle bearing is in surface contact, and a grid structure capable of storing oil is designed at the contact part of the needle bearing and the cross shaft for lubrication. The structure causes large friction force between the cross shaft and the needle roller bearing, if the lubrication measure is not in place, the abrasion consumption is serious, the idle moment of the intermediate shaft is large, and abnormal sound is generated.

Disclosure of Invention

The utility model aims to provide a low-friction universal joint structure for a steering intermediate shaft, which reduces the rotating friction between a cross shaft and a needle bearing.

The technical scheme of the utility model is as follows:

the utility model provides a turn to low friction universal joint structure for jackshaft, includes outer joint fork, interior joint fork, cross, bearing, outer joint fork passes through the cross with interior joint fork and is connected with bearing, the cross includes central axis body, and central axis body designs all around has four spindle noses, installs bearing between four spindle noses and interior joint fork or the outer joint fork, the tip of spindle nose is the sphere, and bearing and spindle nose tip contact one side are the plane, spindle nose tip and bearing point contact.

The utility model has the beneficial effects that:

the application provides a reliable jackshaft structure, this jackshaft is through changing cross and bearing cooperation type, changes the face contact into the point contact, greatly reduced the running friction of universal joint, reduced jackshaft no-load moment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the whole structure of the low-friction universal joint for the steering intermediate shaft.

Fig. 2 is a sectional view a-a of the low friction joint structure for a steering intermediate shaft of fig. 1.

FIG. 3 is a schematic view of a cross shaft structure of the low-friction universal joint structure for the steering intermediate shaft according to the present application.

FIG. 4 is a schematic view of a needle bearing structure of the low-friction universal joint structure for the steering intermediate shaft according to the present application.

Fig. 5 is a cross-sectional view of a prior art universal joint for an intermediate shaft.

Fig. 6 is a schematic view of a cross shaft structure of a universal joint for a prior art intermediate shaft.

Fig. 7 is a schematic view of a needle bearing structure of a universal joint for an intermediate shaft according to the prior art.

Reference numerals:

1. an outer joint fork; 2. an inner joint fork; 3. a cross shaft; 31. a shaft head; 32. a needle bearing; 33. a shaft end;

Detailed Description

In order to clearly express the purpose, technical scheme and product advantages of the utility model, the utility model is further described in detail with reference to the accompanying drawings.

The universal joint is a part for realizing variable angle power transmission, is used for changing the position of the transmission axis direction, and is a joint part of a universal transmission device of an automobile driving system. The conventional universal joint includes an outer yoke 1, an inner yoke 2, a cross 3, and a needle bearing 32. The cross shaft is connected with the inner yoke and the outer yoke through the needle bearing, the end face of the cross shaft is a plane, a grid oil storage structure 34 is designed in the needle bearing 32 and used for lubricating, but the friction force is large due to the fact that the end face of the cross shaft is in surface contact with the needle bearing.

The application turns to low friction universal joint structure for jackshaft, including outer yoke 1, interior yoke 2, cross 3, needle bearing 32, outer yoke 1 is connected through cross 3 and needle bearing 32 with interior yoke 2, install needle bearing 32 between four spindle noses 31 of cross 3 and interior yoke 2 or the outer yoke 1, axle head 33 of cross 3 is the sphere, and needle bearing 32 is the plane with axle head 33 contact one side of spindle nose 31, the tip 33 and the needle bearing 32 point contact of spindle nose 31.

The utility model provides a become low friction fit's point contact by ordinary type complex face contact between cross axle head and the bearing, greatly reduced the running friction of universal joint, reduced jackshaft no-load moment. The jackshaft is connected with steering column and steering gear through this application universal joint fork for car a steering system connects more stably.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a turn to low friction universal joint structure for jackshaft which characterized in that: the universal joint comprises an outer joint fork, an inner joint fork, a cross shaft and a needle bearing, wherein the outer joint fork and the inner joint fork are connected through the cross shaft and the needle bearing, the cross shaft comprises a central shaft body, the central shaft body is provided with four shaft heads, the needle bearing is arranged between the four shaft heads and the inner joint fork or between the four shaft heads and the outer joint fork, the end parts of the shaft heads are spherical surfaces, one side of the needle bearing, which is in contact with the end parts of the shaft heads, is a plane, and the end parts of the shaft heads are in point contact with the needle bearing.