CN210191582U

CN210191582U - Steering gear end cover assembly

Info

Publication number: CN210191582U
Application number: CN201920913135.5U
Authority: CN
Inventors: Weijun Peng; 彭微君; Xiaosheng Tang; 汤小生
Original assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Geely Automobile Research Institute Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Geely Automobile Research Institute Co Ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-03-27
Anticipated expiration: 2029-06-17

Abstract

The utility model provides a steering gear end cover subassembly belongs to car technical field. The problem that the coaxiality of the existing steering gear end cover assembly and a box body after assembly still does not reach an ideal numerical range is solved. The end cover assembly of the steering gear comprises a lower tubular column and an end cover, wherein the end surface of the end cover, which is far away from the lower tubular column, is at least provided with three convex points which protrude outwards, and the central position of the convex points is coaxial with the lower tubular column. When the end cover assembly of the steering gear is assembled with the box body, the end cover assembly is matched with the inner wall of the matching hole in the box body through the salient points on the end cover, the end cover assembly and the box body are matched and positioned, the coaxiality of the end cover assembly and the box body after assembly is ensured, and the abrasion of the end cover assembly and internal parts in the working process is reduced.

Description

Steering gear end cover assembly

Technical Field

The utility model belongs to the technical field of the car, a steering gear end cover subassembly is related to.

Background

An electric power steering column system of an automobile, also called a C-EPS system, is a power steering system which directly depends on a motor to provide auxiliary torque. Most end covers of the automobile electric power steering column system are die-cast aluminum parts, and the end covers and a lower column are connected in an interference fit press-fitting mode.

For example, chinese patents [ application No. 201520506909.4; the utility model discloses a connection structure of electric steering tube column section of thick bamboo and upper cover that grant bulletin number CN 204775424U discloses, including tube column section of thick bamboo and upper cover, the one end of tube column section of thick bamboo is equipped with the step bobbin, and the left end of the step body that the upper cover set up the bearing is equipped with the step body with the step bobbin interference fit of tube column section of thick bamboo one end.

The connecting structure of the tube column tube and the upper cover of the electric steering gear improves the assembly precision of the end cover assembly, but the connecting structure has the problems that the coaxiality of the end cover assembly and the box body after assembly still does not reach the ideal numerical range due to errors existing in the assembly of the end cover assembly and turning errors after assembly, and the bearing is abnormally abraded due to the fact that the internal friction force of the steering column is large easily due to low coaxiality.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, a steering gear end cover subassembly has been proposed, the utility model provides a technical problem be how to improve the axiality after steering gear end cover subassembly and the box assembly.

The purpose of the utility model can be realized by the following technical proposal: the end cover assembly of the steering gear comprises a lower tubular column and an end cover, and is characterized in that the end face, far away from the lower tubular column, of the end cover is at least provided with three convex points protruding outwards, and the central positions of the convex points are coaxial with the lower tubular column.

The steering gear end cover assembly is clamped through the outer circular surface of the lower tubular column, and the salient points are turned, so that the central positions of the salient points are coaxial with the lower tubular column. When the end cover assembly is installed on the box body, the salient points are matched and positioned with the hole wall of the matching hole of the box body, and therefore the coaxiality of the assembled lower tubular column and the assembled box body is guaranteed.

In the steering gear end cover assembly, concave holes corresponding to the convex points one by one are formed in the end face, close to the lower tubular column, of the end cover. The end cover is a stamping forming part, in the end cover forming process, a convex point is formed by extruding materials on the end cover, a concave hole is formed in the other end face opposite to the convex point, the convex point has high position precision after stamping forming, and a large amount of materials on the convex point are not required to be removed in subsequent turning.

In the steering gear end cover assembly, the end cover is further provided with a plurality of fixing holes for fixing the end cover and the box body, and the salient point is located between every two adjacent fixing holes. Because end cover subassembly and box during the assembly, cooperate the location through bump and mating holes pore wall earlier, rethread bolt passes the fixed orifices after revolves to twist and fixes in the bolt hole of box, the bump is located between the fixed orifices for after end cover subassembly and box pass through the bump location, the fixed orifices of end cover and the position deviation of the same bolt hole can not too big influence the installation of bolt.

In the steering gear end cover assembly, the end cover is provided with a thick positioning hole for positioning the lower tubular column, and the lower tubular column is inserted into the thick positioning hole and is welded and fixed with the end cover. The end cover and the lower pipe column are formed independently, the lower pipe column is positioned with the end cover through the thick positioning hole and then fixedly connected with the end cover, and therefore the coaxiality of the lower pipe column and the end cover cannot be too large in deviation.

In the steering gear end cover assembly, the welding seam of the end cover and the lower tubular column is positioned on the end face, close to the lower tubular column, of the end cover. The location of the weld is easier for the welding operation.

Alternatively, in the above-described steering end cap assembly, the end cap and the lower tubular string are of a unitary construction. The end cap assembly may also be manufactured as a single piece.

Compared with the prior art, the steering gear end cover assembly has the advantages that:

1. this steering gear end cover subassembly is through increasing at least three bump on the end cover to cooperate through bump on the end cover and the cooperation hole inner wall on the box, cooperate the location to end cover combination and box, guarantee the axiality after end cover subassembly and the box assembly, reduce the wearing and tearing of end cover subassembly and inside spare part in the course of the work.

2. The boss of the end cover assembly of the steering gear can be integrally formed with the end cover, and the end cover assembly is low in production cost and easy to popularize and use under the condition that the coaxiality of the end cover assembly and the box body is further improved.

Drawings

FIG. 1 is a schematic structural view of the present diverter end cover assembly and housing.

FIG. 2 is a schematic structural view of the present diverter end cover assembly.

FIG. 3 is a bottom view of the end cap assembly of the present diverter.

In the figure, 1, lower pipe column; 2. an end cap; 3. salient points; 4. concave holes; 5. a fixing hole; 6. coarse positioning holes; 7. a box body; 8. a mating hole; 9. bolt holes; 10. and (7) welding seams.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

The first embodiment is as follows:

the end cap assembly of the steering gear comprises a lower tubular column 1 and an end cap 2.

Specifically, as shown in fig. 1, 2 and 3, the end cap 2 has a disk shape, and the lower pipe column 1 has a cylindrical shape. In this embodiment, lower tubular column 1 and end cover 2 are formed alone, and lower tubular column 1 can be through the cold drawn steel pipe, and end cover 2 adopts stamping forming. As shown in fig. 3, the end cap 2 has a rough positioning hole 6 for positioning the lower tubular column 1, and the lower tubular column 1 is inserted into the rough positioning hole 6 and is welded and fixed with the end cap 2. Preferably, the end cap 2 and the weld 10 of the lower tubular string 1 are located on the end face of the end cap 2 close to the lower tubular string 1, and the position of the weld 10 is easier for the welding operation.

As shown in fig. 2 and 3, in this embodiment, the end surface of the end cover 2 away from the lower tubular column 1 is provided with three outward convex protrusions 3, and after the lower tubular column 1 is welded to the end cover 2, the outer circle surface of the lower tubular column 1 is clamped to perform turning on the convex protrusions 3, so that the central position of the arrangement of the convex protrusions 3 is coaxial with the lower tubular column 1. When the end cover assembly is installed on the box body 7, the salient points 3 are matched and positioned with the hole wall of the matching hole 8 of the box body 7, and therefore the coaxiality of the assembled lower tubular column 1 and the assembled box body 7 is guaranteed.

Preferably, concave holes 4 corresponding to the convex points 3 in a one-to-one mode are formed in the end face, close to the lower pipe column 1, of the end cover 2. The end cover 2 is a stamping forming part, in the forming process of the end cover 2, a convex point 3 is formed by extruding materials on the end cover 2, a concave hole 4 is formed on the other end face opposite to the position of the convex point 3, and the convex point 3 has high position precision after stamping forming. The number of bumps 3 may also be more than three in the actual production and manufacturing process.

As shown in fig. 1, the end cover 2 further has three fixing holes 5 for fixing the end cover 2 and the case 7, and the case 7 has bolt holes 9 corresponding to the fixing holes 5 one by one. Preferably, as shown in fig. 3, the bumps 3 are located between two adjacent fixing holes 5. Because end cover subassembly and box 7 during the assembly, earlier cooperate the location through bump 3 and 8 pore walls of mating holes, rethread bolt passes fixed orifices 5 and revolves to twist and fix in the bolt hole 9 of box 7, and bump 3 is located between fixed orifices 5 for after end cover subassembly and box 7 pass through bump 3 location, the mounting of bolt can not too big influence to the fixed orifices 5 of end cover 2 and the positional deviation of the same bolt hole 9.

Example two:

the technical solution in this embodiment is substantially the same as that in the first embodiment, except that in this embodiment, the end cover 2 and the lower tubular column 1 are an integrated structure. The end cap assembly may also be manufactured as a single piece.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The end cover assembly of the steering gear comprises a lower pipe column (1) and an end cover (2), and is characterized in that the end face, far away from the lower pipe column (1), of the end cover (2) is at least provided with three convex points (3) protruding outwards, and the central positions of the convex points (3) are coaxial with the lower pipe column (1).

2. The end cover assembly of the steering gear according to claim 1, characterized in that the end cover (2) is provided with concave holes (4) corresponding to the positions of the convex points (3) on the end surface close to the lower pipe column (1).

3. The end cover assembly of the steering gear according to claim 1, characterized in that the end cover (2) is further provided with a plurality of fixing holes (5) for fixing the end cover (2) and the box body (7), and the salient points (3) are positioned between two adjacent fixing holes (5).

4. The steering end cover assembly according to claim 1, 2 or 3, wherein the end cover (2) is provided with a rough positioning hole (6) for positioning the lower pipe column (1), and the lower pipe column (1) is inserted into the rough positioning hole (6) and is welded and fixed with the end cover (2).

5. The end cover assembly according to claim 4, characterized in that the weld seam (10) of the end cover (2) and the lower pipe string (1) is located on the end face of the end cover (2) near the lower pipe string (1).

6. The steering end cover assembly according to claim 1, 2 or 3, wherein the end cover (2) and the lower column (1) are of unitary construction.