CN202208311U

CN202208311U - Motor and worm connecting device for electric power-assisted steering system

Info

Publication number: CN202208311U
Application number: CN2011203384965U
Authority: CN
Inventors: 郭锐; 艾涛; 李文峰
Original assignee: Wuhan Jielong Electric Power Steering Co Ltd
Current assignee: Wuhan Jielong Electric Power Steering Co Ltd
Priority date: 2011-09-09
Filing date: 2011-09-09
Publication date: 2012-05-02
Anticipated expiration: 2021-09-09

Abstract

The utility model relates to a motor and worm connecting device for an electric power-assisted steering system, belonging to the technical field of manufacturing parts of a car steering gear. The motor and worm connecting device for the electric power-assisted steering system comprises a worm assembly, a motor assembly, a four-claw A, a four-claw B, a protective sleeve and the like, wherein the worm assembly is arranged in a shell assembly, one end of the shell assembly is connected with the motor assembly, the four-claw B is press-mounted on a motor shaft of the motor assembly in an interference manner and fixedly provided with the four-claw A and a rubber pad through the protective sleeve; and a spline shaft on the worm assembly is spliced in a spline hole of the four-claw A. In the utility model, the motor and worm connecting device comprises the protective sleeve, the four-claw A, the four-claw B and the rubber pad, thus reducing the requirement on matching precision of the worm assembly and the four-claw A. When large torque is transmitted, once the four-claw A and the four-claw B are broken, the protective sleeve covers the four-claw A and the four-claw B, the problem that a motor is clamped by fragments of the four-claw A and the four-claw B and causes steering malfunction and influence on driving safety can be effectively avoided.

Description

A kind of motor of electric boosting steering system and worm screw connecting device

Technical field

The utility model relates to a kind of motor and worm screw connecting device of electric boosting steering system, belongs to automobile steering device parts manufacturing technology field.

Background technology

The motor of existing electric boosting steering system mainly adopts spline to be connected with four paws with worm screw to be connected dual mode.It is high to the requirement on machining accuracy of motor, worm screw and housing part to adopt spline to connect; In case when assembling worm screw with motor coaxle degree and squareness overproof after, worm screw and motor assemble difficult, even can't normally assemble; Even can assemble the service life that also can influence motor and worm screw.The employing four paws connects, and the four paws fit dimension at worm screw and motor two ends can't guarantee, influences the service life of rubber pad; And the four paws that adopts the partial metallurgy material to process is connected under the high pulling torque effect and is prone to breakage, even causes motor stuck, influences driving safety.

Summary of the invention

The purpose of the utility model is: a kind of connection structure that adopts two four paws and rubber pad is provided, and the requirement on machining accuracy of parts is low; And when transmitting large torque, in a single day four paws breaks, can prevent the motor and the worm screw connecting device of the electric boosting steering system that fragment is stuck with motor.

The utility model is realized above-mentioned purpose through following technical scheme:

A kind of motor of electric boosting steering system and worm screw connecting device; It is made up of worm screw assembly, housing assembly, motor assembly, four paws A, four paws B, protecting jacket and rubber pad; The worm screw assembly is housed in the housing assembly, and an end of housing assembly is connected with a motor assembly, it is characterized in that: interference is pressed with four paws B on the motor shaft of described motor assembly; Four paws B goes up and is fixed with a four paws A through protecting jacket, is provided with rubber pad between four paws A and the four paws B; Be manufactured with splined hole on the four paws A, the castellated shaft on the worm screw assembly is plugged in the splined hole of four paws A.

The beneficial effect of the utility model is:

1, the requirement on machining accuracy and the manufacturing cost of motor, worm screw and housing part have been reduced;

2, when assembling,, be convenient to Assembly &Disassembly to the right alignment and the squareness requirement reduction of worm screw and motor;

3, can accurately control the four paws fit dimension, improve the service life of rubber pad;

4, the end float misalignment of four paws A and four paws B be can effectively prevent through protecting jacket, motor and worm screw abnormal sound reduced;

5, through protecting jacket with four paws A and four paws B parcel, in case can effectively prevent the phenomenon that motor is stuck when four paws A and four paws B explosion.

Description of drawings:

Accompanying drawing is the motor of electric boosting steering system and the structural representation of worm screw connecting device.

Among the figure: 1, worm screw assembly, 2, housing assembly, 3, four paws A, 4, protecting jacket, 5, rubber pad, 6, four paws B, 7, motor assembly.

The specific embodiment:

The motor of this electric boosting steering system and worm screw connecting device are made up of worm screw assembly 1, housing assembly 2, motor assembly 7, four paws A3, four paws B6, protecting jacket 4 and rubber pad 5; Worm screw assembly 1 is housed in the housing assembly 2, and an end of housing assembly 2 is connected with a motor assembly 7.Interference is pressed with four paws B6 on the motor shaft of described motor assembly 7, and four paws B6 goes up and is fixed with a four paws A3 through protecting jacket 4, is provided with rubber pad 5 between four paws A3 and the four paws B6; Be manufactured with splined hole on the four paws A3, the castellated shaft on the worm screw assembly 1 is plugged in the splined hole of four paws A3.

When the motor of this electric boosting steering system and worm screw connecting device are installed, earlier four paws B6 interference is fitted on the motor shaft of motor assembly 7, limits its axial location, again four paws A3 and rubber pad 5 are packed in the protecting jacket 4, then it is connected with four paws B6; Connect through rubber pad 5 between four paws A3 and the four paws B6, can reduce the female splines quality of fit requirement of the spline and the four paws A3 of worm screw assembly 1, prevented the end float misalignment of four paws A3, four paws B6 and rubber pad 5; At last the castellated shaft on the worm screw assembly 1 is plugged on promptly to accomplish in the splined hole of four paws A3 and installs.When the motor of this electric boosting steering system and worm screw connecting device use; When transmitting large torque; The four paws A3 of partial metallurgy material and four paws B6 are in case break; Because protecting jacket 4 can prevent that with its parcel the fragment of four paws A3 and four paws B6 is stuck with motor, malfunctioning, as to influence driving safety problem occurs turning to.

Claims

1. the motor of an electric boosting steering system and worm screw connecting device; It is made up of worm screw assembly (1), housing assembly (2), motor assembly (7), four paws A (3), four paws B (6), protecting jacket (4) and rubber pad (5); Worm screw assembly (1) is housed in the housing assembly (2); One end of housing assembly (2) is connected with a motor assembly (7); It is characterized in that: interference is pressed with four paws B (6) on the motor shaft of described motor assembly (7), and four paws B (6) goes up and is fixed with a four paws A (3) through protecting jacket (4), is provided with rubber pad (5) between four paws A (3) and the four paws B (6); Four paws A is manufactured with splined hole on (3), and the castellated shaft on the worm screw assembly (1) is plugged in the splined hole of four paws A (3).