CN212797061U

CN212797061U - Rack bushing for electric steering gear

Info

Publication number: CN212797061U
Application number: CN202021550313.1U
Authority: CN
Inventors: 张平; 姚昌利
Original assignee: Henan Guangrui Automative Parts Co ltd
Current assignee: Henan Guangrui Automative Parts Co ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-03-26
Anticipated expiration: 2030-07-30

Abstract

The utility model discloses a rack bush for electric steering gear, including two first bush main parts and two second bush main parts, the second bush main part is located between two first bush main parts, and a plurality of built-in holding tanks have all been seted up to the opposite face of two second bush main parts, and the inside of two built-in holding tanks that correspond from top to bottom is provided with built-in ball jointly, and a plurality of external holding tanks have all been seted up to the opposite face of second bush main part and first bush main part, and the inside of two external holding tanks that correspond from top to bottom is provided with external ball jointly. The utility model discloses an at the external ball of the internally mounted of first bush main part and second bush main part and built-in ball, can strengthen the ability of wear-resisting of first bush main part and second bush main part, only need add a small amount of lubricating grease and lubricate, reduced use cost, and be difficult for causing wearing and tearing.

Description

Rack bushing for electric steering gear

Technical Field

The utility model relates to an auto steering ware accessory technical field specifically is a rack bush for electric steering gear.

Background

The steering gear is a mechanical device which is driven by people or unmanned and has a power source, so that the steering gear randomly changes the running route and direction during running. The steering gear is also called a steering gear and a steering gear, and is the most important part in a steering system. It has the following functions: increasing the force transmitted by the steering wheel to the steering gear and changing the direction of force transmission. The energy required for steering a vehicle using a power steering system is normally only a small part of the physical energy provided by the driver and a large part of the hydraulic energy provided by an oil pump driven by the engine. The rack bushing of the steering gear is used for supporting and fixing a rack in the steering gear, and the faults that the rack is deformed and turned in the steering gear, so that steering abnormal sound and oil leakage of an oil seal occur are prevented. The rack bushing is fixed in the steering gear shell in an interference mode, and when the steering gear is operated, the rack moves back and forth in the bushing in the axial direction. After the steering wheel is used for a long time, along with the occurrence of abrasion, the gap between the rack and the bushing is larger and larger, abnormal sound of the steering gear is caused, the phenomenon that the steering wheel is rightly too fast possibly occurs, the steering wheel is not convenient for a driver to control, and serious driving safety hidden dangers exist.

Chinese patent application CN202806856U discloses a rack bushing, which comprises a bushing body, the bushing body is formed by polyurethane injection molding, is equipped with two at least axially extending strip-shaped bulges on the circumference of the inner wall of the bushing body, a plurality of hole-shaped grooves have been seted up on the strip-shaped bulges, is equipped with on the outer wall of the bushing body a cutting plane corresponding to the strip-shaped bulges, and it is protruding to be equipped with axially extending damping on the cutting plane. Although the rack bushing has better lubricating property and wear resistance, abnormal sound of a steering gear caused by overlarge fit clearance between the rack and the bushing and the phenomenon that the steering wheel is corrected too fast can be effectively avoided, and the processing technology is simpler. However, the hole-shaped groove is lubricated by filling grease into the hole-shaped groove, so that the hole-shaped groove needs to be frequently replenished, the use cost is increased, and the wear is difficult to find in time. Therefore, a rack bushing for an electric power steering apparatus is proposed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rack bush for electric steering gear has solved and has lubricated through the inside packing lubricating grease at poroid recess, needs often to supply, has not only increased use cost, hardly in time discovers the problem of wearing and tearing moreover.

The utility model provides a following technical scheme: the utility model provides a rack bush for electric steering gear, is including two first bush main parts and two second bush main parts, second bush main part is located between two first bush main parts, and two a plurality of built-in holding tanks have all been seted up to the opposite face of second bush main part, and two that correspond from top to bottom the inside of built-in holding tank is provided with built-in ball jointly, a plurality of external holding tanks have all been seted up with the opposite face of first bush main part to second bush main part, and two that correspond from top to bottom the inside of external holding tank is provided with external ball jointly.

Preferably, a cutting plane is formed in the outer sides of the first bushing main body and the second bushing main body, and a damping protrusion is fixedly mounted on the inner side of the cutting plane.

Preferably, axial teeth are arranged on the outer sides of the first bushing main body and the second bushing main body, and the axial teeth and the cutting plane are distributed at intervals.

Preferably, three grooves are formed in the back faces of the first bushing main bodies, connecting through holes communicated with the grooves are formed in the surfaces of the first bushing main bodies and the second bushing main bodies, and connecting bolts are arranged inside the connecting through holes and the grooves and correspond to the connecting through holes and the grooves from top to bottom.

Preferably, three first exhaust grooves are uniformly formed in the inner side of the first bushing main body, and three second exhaust grooves communicated with the first exhaust grooves are uniformly formed in the inner side of the second bushing main body.

Preferably, the first exhaust grooves and the outer balls are distributed at intervals, and the second exhaust grooves and the inner balls are distributed at intervals.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses an at the external ball of the internally mounted of first bush main part and second bush main part and built-in ball, can strengthen the ability of wear-resisting of first bush main part and second bush main part, only need add a small amount of lubricating grease and lubricate, reduced use cost, and be difficult for causing wearing and tearing.

2. The utility model provides a between first bush main part and second bush main part, adopt connecting bolt to fix to the convenience is torn open external ball and built-in ball and is adorned in the inside of external holding tank and built-in holding tank respectively, and the practicality is stronger.

Drawings

Fig. 1 is a top view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

fig. 3 is a top view of the first bushing main body according to the present invention.

In the figure: 1. a shock absorbing bulge; 2. cutting a plane; 3. axial teeth; 4. a first exhaust groove; 5. a first bushing body; 6. a connecting bolt; 7. a second bushing body; 8. a second exhaust groove; 9. an external accommodating groove; 10. external balls; 11. balls are arranged inside; 12. accommodating grooves are arranged inside; 13. a connecting through hole; 14. and (4) a groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

A rack bushing for an electric power steering apparatus includes two first bushing bodies 5 and two second bushing bodies 7, the second bushing bodies 7 being located between the two first bushing bodies 5, and the opposite surfaces of the two second bush main bodies 7 are respectively provided with a plurality of internal containing grooves 12, the internal balls 11 are arranged inside the two internal containing grooves 12 which are vertically corresponding, the opposite surfaces of the second bush main bodies 7 and the first bush main body 5 are respectively provided with a plurality of external containing grooves 9, the external balls 10 are arranged inside the two external containing grooves 9 which are vertically corresponding, by installing the outer balls 10 and the inner balls 11 inside the first and second

bushing bodies

5 and 7, the anti-wear capacity of the first bushing main body 5 and the second bushing main body 7 can be enhanced, only a small amount of lubricating grease needs to be added for lubrication, the use cost is reduced, and abrasion is not easy to cause.

Referring to fig. 1 and 3, a cutting plane 2 is formed on the outer sides of the first bushing main body 5 and the second bushing main body 7, and a shock absorbing protrusion 1 is fixedly mounted on the inner side of the cutting plane 2.

Referring to fig. 1 and 3, the axial teeth 3 are disposed on the outer sides of the first bushing main body 5 and the second bushing main body 7, and the axial teeth 3 are spaced from the cutting plane 2 to reduce the resistance when the bushing is inserted into the housing.

Referring to fig. 1 and 3, three grooves 14 are formed in the back surfaces of the two first bushing main bodies 5, connecting through holes 13 communicated with the grooves 14 are formed in the surfaces of the first bushing main bodies 5 and the second bushing main body 7, and the connecting bolts 6 are arranged inside the connecting through holes 13 and the grooves 14 which correspond to each other up and down, so that the first bushing main bodies 5 and the second bushing main body 7 can be conveniently disassembled and assembled.

Referring to fig. 2, three first exhaust grooves 4 are uniformly formed in the inner side of the first liner main body 5, and three second exhaust grooves 8 communicated with the first exhaust grooves 4 are uniformly formed in the inner side of the second liner main body 7, so as to facilitate exhaust.

Referring to fig. 2, the first exhaust grooves 4 are spaced apart from the outer balls 10, and the second exhaust grooves 8 are spaced apart from the inner balls 11.

The working principle is as follows: when in use, the first bush main body 5 with the external holding groove 9 on the upper surface is firstly placed on the working table surface, the external ball 10 is placed inside the external holding groove 9, then the built-in balls 11 are placed in the built-in containing grooves 12 formed in the two second bush main bodies 7, two second bush main bodies 7 provided with built-in balls 11 are placed on the surface of the first bush main body 5 with the external holding groove 9 on the upper surface, finally the first bush main body 5 with the external holding groove 9 on the lower surface is placed on the surface of the second bush main body 7, and the external ball 10 is placed in the external accommodating groove 9 formed in the first bush main body 5 and the second bush main body 7, and the first bush main body 5 and the second bush main body 7 can be fixed by penetrating the connecting bolt 6 through the connecting through hole 13 and the groove 14 formed in the first bush main body 5 and the second bush main body 7.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A rack bushing for an electric power steering apparatus, comprising two first bushing bodies (5) and two second bushing bodies (7), characterized in that: the second bush main body (7) is located between the two first bush main bodies (5), a plurality of built-in containing grooves (12) are formed in the opposite face of the second bush main body (7), the two corresponding up and down portions of the built-in containing grooves (12) are provided with built-in balls (11) together, a plurality of external containing grooves (9) are formed in the opposite face of the second bush main body (7) and the opposite face of the first bush main body (5), and the two corresponding up and down portions of the external containing grooves (9) are provided with external balls (10) together.

2. The rack bushing for an electric power steering according to claim 1, wherein: cutting plane (2) have all been seted up in the outside of first bush main part (5) and second bush main part (7), cutting plane's (2) inboard fixed mounting has shock attenuation arch (1).

3. The rack bushing for an electric power steering according to claim 1, wherein: the outer sides of the first bushing main body (5) and the second bushing main body (7) are respectively provided with axial teeth (3), and the axial teeth (3) and the cutting plane (2) are distributed at intervals.

4. The rack bushing for an electric power steering according to claim 1, wherein: two three recess (14) have all been seted up to the back of the body of first bush (5), just connect hole (13) with recess (14) intercommunication are all seted up on the surface of first bush body (5) and second bush body (7), correspond from top to bottom connect hole (13) and the inside of recess (14) are provided with connecting bolt (6) jointly.

5. The rack bushing for an electric power steering according to claim 1, wherein: three first exhaust grooves (4) have evenly been seted up to the inboard of first bush main part (5), three second exhaust groove (8) with first exhaust groove (4) intercommunication have evenly been seted up to the inboard of second bush main part (7).

6. The rack bushing for an electric power steering according to claim 5, wherein: the first exhaust grooves (4) and the external balls (10) are distributed at intervals, and the second exhaust grooves (8) and the internal balls (11) are distributed at intervals.