A steering column universal joint fork and steering gear installation connection structure

Abstract

The present invention relates to a steering column yoke fork and a steering gear installation connection structure, belonging to the technical field of automobile design and manufacturing. The steering column yoke fork and the steering gear installation connection structure of the present invention is composed of a steering gear input shaft, a yoke fork, a connecting bolt and a threaded tube; the upper end of the steering gear input shaft is a waist-shaped shaft, and an axial limit groove is provided on the outer side wall of the waist-shaped shaft; a first special-shaped hole is provided on the left bottom mounting end of the yoke fork, and a second special-shaped hole is provided on the right bottom mounting end of the yoke fork, and an opening is provided between the left bottom mounting end and the right bottom mounting end. The connection structure of the present invention reduces the number of customized parts supplied to the general assembly line, reduces the difficulty of plugging the yoke fork and the steering gear input shaft, and simplifies the assembly steps.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile design and manufacture, and more specifically, to a mounting connection structure of a steering column universal yoke and a steering gear. Background Art

[0002] like Figure 1-2 As shown, in the prior art, the steering column universal joint fork is inserted into the steering gear input shaft and then the bolt is inserted into the steering column universal joint fork bolt hole and tightened. This structure has many assembly steps and is difficult to operate. Its shortcomings are mainly the following:

[0003] (1) Fastening bolts need to be customized separately, which increases the number of parts supplied on the assembly line and thus increases the pressure on parts management and delivery on the assembly line;

[0004] (2) During the assembly of the yoke and the steering input shaft, the yoke often cannot be inserted into the steering input shaft because the yoke opening is too small (tools are needed to expand the yoke opening);

[0005] (3) The operating space at the connection between the universal joint fork and the steering gear input shaft is small and the location is remote, making it difficult for the bolts to accurately penetrate the installation holes, which will delay the assembly cycle and increase the difficulty of subsequent maintenance. Summary of the invention

[0006] In order to solve the above technical problems existing in the prior art, the object of the present invention is to provide a steering column universal joint fork and a steering gear installation connection structure.

[0007] The steering column universal joint fork and steering gear installation connection structure of the present invention is characterized in that it is composed of a steering gear input shaft, a universal joint fork, a connecting bolt and a threaded tube; the upper end of the steering gear input shaft is a waist-shaped shaft, and an axial limit groove is arranged on the outer side wall of the waist-shaped shaft; a first special-shaped hole is arranged on the left bottom mounting end of the universal joint fork, and a second special-shaped hole is arranged on the right bottom mounting end of the universal joint fork, and an opening is arranged between the left bottom mounting end and the right bottom mounting end; the connecting bolt includes a shaft rod, an external thread is arranged on the shaft rod, and a neck is arranged between the bolt head and the shaft rod; the threaded tube includes a large flange located at the left end and a small flange located at the right end, and a flat shaft is arranged between the large flange and the small flange, and the interior of the threaded tube has an internal thread; the small flange of the threaded tube passes through the universal joint fork On the inner side of the first special-shaped hole at the left bottom mounting end, the shaft rod of the connecting bolt is passed through the inner side of the second special-shaped hole at the right bottom mounting end of the universal joint fork and screwed into the inner thread of the threaded tube, the neck of the connecting bolt and the flat shaft of the threaded tube are pushed into the outer side of the second special-shaped hole and the first special-shaped hole, the connecting bolt is rotated so that the shoulder of the neck and the small flange of the threaded tube are against the inner surface of the opening of the universal joint fork and the opening of the universal joint fork is stretched open so that the connecting bolt and the threaded tube are fixed between the right bottom mounting end and the left bottom mounting end of the universal joint fork; the waist-shaped shaft of the steering gear input shaft is inserted into the inner side of the opening of the universal joint fork, and the waist-shaped shaft of the steering gear input shaft is located on the inner side of the threaded tube, the connecting bolt is tightened and the side wall of the threaded tube is inserted into the axial limit groove of the steering gear input shaft.

[0008] Wherein, the first special-shaped hole is a special-shaped hole formed by combining a large hole and an oblong hole.

[0009] Wherein, the second special-shaped hole is a special-shaped hole formed by combining a large hole and an oblong hole.

[0010] Wherein, the upper and lower surfaces of the flat shaft are planes.

[0011] Wherein, the left and right surfaces of the waist-shaped shaft are planes.

[0012] Compared with the prior art, the steering column universal yoke and steering gear mounting connection structure of the present invention has the following beneficial effects:

[0013] The connection structure of the present invention reduces the number of customized parts supplied on the general assembly line, reduces the difficulty of plugging the universal joint fork and the steering gear input shaft, and simplifies the assembly steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The invention is a schematic diagram of a mounting connection structure of a steering column universal joint fork and a steering gear in the prior art.

[0015] Figure 2 The invention is an exploded view of a mounting connection structure of a steering column universal joint fork and a steering gear in the prior art.

[0016] Figure 3 It is a schematic diagram of the mounting connection structure of the steering column universal joint fork and the steering gear of the present invention.

[0017] Figure 4 It is an exploded view of the mounting connection structure of the steering column universal yoke fork and the steering gear of the present invention.

[0018] Figure 5 It is a cross-sectional view of the mounting connection structure of the steering column universal yoke fork and the steering gear of the present invention.

[0019] Figure 6 It is a front view of the steering input shaft in the connection structure of the present invention.

[0020] Figure 7 It is a side view of the steering input shaft in the connection structure of the present invention.

[0021] Figure 8 It is a front view of the steering column yoke in the connection structure of the present invention.

[0022] Fig. 9 It is a right side view of the steering column universal yoke in the connection structure of the present invention.

[0023] Fig.10 It is a left side view of the steering column universal joint fork in the connection structure of the present invention.

[0024] Fig.11 It is a front view of a bolt in the connection structure of the present invention.

[0025] Fig.12 It is a perspective view of a threaded pipe in the connection structure of the present invention.

[0026] Fig.13 It is a cross-sectional view of a threaded pipe in the connection structure of the present invention. DETAILED DESCRIPTION

[0027] The steering column yoke and steering gear mounting connection structure of the present invention will be further described below in conjunction with specific embodiments to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0028] Example 1

[0029] like Figure 3-13As shown, the steering column universal joint fork and the steering gear installation connection structure of this embodiment are composed of a steering gear input shaft 100, a universal joint fork 200, a connecting bolt 300 and a threaded tube 400. The upper end of the steering gear input shaft 100 is a waist-shaped shaft 110, and an axial limit groove 120 is provided on the outer side wall of the waist-shaped shaft 110. A first special-shaped hole is provided on the left bottom mounting end of the universal joint fork 200, and the first special-shaped hole is a special-shaped hole formed by combining a large hole 210 and an oblong hole 220. A second special-shaped hole is provided on the right bottom mounting end of the universal joint fork 200, and the second special-shaped hole is a special-shaped hole formed by combining a large hole 230 and an oblong hole 240. There is an opening 250 between the left bottom mounting end and the right bottom mounting end. The connecting bolt 300 includes a shaft, the shaft is provided with external threads, and a neck 310 is provided between the bolt head and the shaft, and the diameter of the shaft is larger than the diameter of the oblong hole of the second special-shaped hole. The threaded tube 400 includes a large flange 410 located at the left end and a small flange 420 located at the right end, and a flat shaft 430 is provided between the large flange 410 and the small flange 420, and the upper and lower surfaces of the flat shaft 430 are planes, and the interior of the threaded tube 400 has internal threads.

[0030] During assembly, at the steering column assembly line or supplier, one end of the small flange 420 of the threaded tube 400 is passed through the large hole 230 of the bottom mounting end on the left side of the universal joint fork 200, and then the shaft of the connecting bolt 300 is passed through the large hole 210 of the bottom mounting end on the right side of the universal joint fork 200 and screwed with the internal thread of the threaded tube 400 but not tightened, and then the neck 310 of the connecting bolt 300 and the flat shaft 430 of the threaded tube 400 are pushed into the bottom mounting end on the right side of the universal joint fork 200. The bolt 300 is rotated to make the shoulder of the neck 310 and the small flange 420 of the threaded tube 400 abut against the inner surface of the opening 250 of the yoke fork 200 and open the opening 250 of the yoke fork 200. The force generated thereby can fix the bolt 300 and the threaded tube 400 between the oblong hole 240 at the left bottom mounting end of the yoke fork 200 and the oblong hole 220 at the right bottom mounting end.

[0031] In the connection structure of this embodiment, if the opening of the universal joint fork 200 is too small to affect the assembly when the steering column and the steering gear are assembled, the connection bolt 300 can be rotated in the opposite direction to expand the opening 250 of the universal joint fork 200 so that the waist-shaped shaft 110 of the steering gear input shaft 100 can be inserted into the opening 250 of the universal joint fork 200. The waist-shaped shaft 110 of the steering gear input shaft 100 is inserted into the opening 250 of the universal joint fork 200, and the waist-shaped shaft 110 of the steering gear input shaft 100 is located on the inner side of the threaded tube 400. The connection bolt 300 is tightened and the side wall of the threaded tube 400 is inserted into the axial limit groove 120 of the steering gear input shaft 100, which plays a role in preventing the steering gear input shaft from axially falling off.

[0032] The connection structure of this embodiment reduces the dimensional accuracy requirements of the yoke opening, thereby improving the yoke qualification rate and reducing production costs. At the same time, the connection structure of this embodiment also reduces the number of customized parts supplied to the assembly line, reduces the pressure of parts management and distribution on the assembly line, and can increase the assembly speed of this station on the assembly line, reduce the assembly workload, and reduce the difficulty of later maintenance. The connection structure of this embodiment can be used for the connection between the steering column and the steering gear of all passenger cars.

[0033] For ordinary technicians in this field, the specific embodiments are only illustrative descriptions of the present invention. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A steering column universal yoke and steering gear mounting connection structure, characterized in that: It is composed of a steering gear input shaft, a universal joint fork, a connecting bolt and a threaded tube; the upper end of the steering gear input shaft is a waist-shaped shaft, and an axial limit groove is arranged on the outer side wall of the waist-shaped shaft; a first special-shaped hole is arranged on the left bottom mounting end of the universal joint fork, and the first special-shaped hole is a special-shaped hole formed by combining a large hole and an oblong hole; a second special-shaped hole is arranged on the right bottom mounting end of the universal joint fork, and the second special-shaped hole is a special-shaped hole formed by combining a large hole and an oblong hole; there is an opening between the left bottom mounting end and the right bottom mounting end; the connecting bolt includes a shaft rod, the shaft rod is provided with an external thread, and a neck is arranged between the bolt head and the shaft rod; the threaded tube includes a large flange at the left end and a small flange at the right end, and a flat shaft is arranged between the large flange and the small flange, and the interior of the threaded tube has an internal thread; the small flange of the threaded tube Pass through the inner side of the first special-shaped hole at the left bottom mounting end of the universal joint fork, pass the shaft rod of the connecting bolt through the inner side of the second special-shaped hole at the right bottom mounting end of the universal joint fork and screw it into the inner thread of the threaded tube, push the neck of the connecting bolt and the flat shaft of the threaded tube into the outer side of the second special-shaped hole and the first special-shaped hole, rotate the connecting bolt so that the shoulder of the neck and the small flange of the threaded tube abut against the inner surface of the opening of the universal joint fork and open the opening of the universal joint fork so that the connecting bolt and the threaded tube are fixed between the right bottom mounting end and the left bottom mounting end of the universal joint fork; the waist-shaped shaft of the steering gear input shaft is inserted into the inner side of the opening of the universal joint fork, and the waist-shaped shaft of the steering gear input shaft is located on the inner side of the threaded tube, tighten the connecting bolt and insert the side wall of the threaded tube into the axial limit groove of the steering gear input shaft; During assembly, pass one end of the small flange of the threaded tube through the large hole at the left bottom mounting end of the yoke fork at the steering column assembly line or supplier, then pass the shaft of the connecting bolt through the large hole at the right bottom mounting end of the yoke fork and screw it into the internal thread of the threaded tube without tightening it, then push the necking of the connecting bolt and the flat shaft of the threaded tube into the oblong hole at the right bottom mounting end of the yoke fork and the oblong hole at the left bottom mounting end of the yoke fork, rotate the bolt so that the necking shoulder and the small flange of the threaded tube abut against the inner surface of the opening of the yoke fork and open the yoke fork opening, the force generated thereby can fix the bolt and the threaded tube between the oblong hole at the left bottom mounting end of the yoke fork and the oblong hole at the right bottom mounting end.

2. The mounting connection structure of the steering column universal yoke and the steering gear according to claim 1, characterized in that: The upper and lower surfaces of the flat shaft are planes.

3. The mounting connection structure of the steering column yoke and the steering gear according to claim 1, characterized in that: The left and right surfaces of the waist-shaped shaft are planes.

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