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Electric power steering system

A technology of electric power steering and electric motor, which is applied in the direction of electric steering mechanism, etc., can solve the problems of stable use and increased maintenance cost, and achieve the effect of flexible assembly and simple structure

Pending Publication Date: 2016-02-10
ADVANCED MICRO ELECTRONIS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the introduction of many electronic units, the cost of manufacturing and maintenance will increase accordingly, and the stability of use is not as reliable as that of mechanical hydraulics. With the continuous maturity of technology, these shortcomings are gradually being overcome, and electronic hydraulic power assist has become a popular choice for many household vehicles. s Choice

Method used

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  • Electric power steering system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] electric power steering systems such as figure 1 As shown, it includes ball screw 1, ball nut 2, motor 5, swing arm 6;

[0036] The ball nut 2 is adapted to the ball screw 1, its circumferential rotation is limited and it moves axially along the ball screw 1 with the positive and negative rotation of the ball screw 1;

[0037] The outer edge of the ball nut 2 is provided with external teeth;

[0038] The outer edge of one end of the swing arm 6 is provided with external teeth;

[0039] The external teeth provided at one end of the swing arm 6 mesh with the external teeth provided on the outer edge of the ball nut 2, so that the other end of the swing arm 6 can swing with the axial movement of the ball nut 2;

[0040] The motor 5 is used to drive the ball screw 1 to rotate;

[0041] The ball screw 1 is connected with the steering wheel.

[0042] Preferably, the ball screw 1 is elastically connected to the steering wheel through the input shaft, so as to better match ...

Embodiment 2

[0045] Based on the first embodiment, the electric power steering system further includes a first driving element and a second driving element;

[0046] The first driving element is coaxially combined with the output shaft of the motor 5;

[0047] The second driving element is coaxially combined with the ball screw 1;

[0048] The motor 5 drives the ball screw 1 to rotate through the first driving element and the second driving element.

[0049] Preferably, the first driving element is a gear;

[0050] The outer edge of the second drive element is uniformly provided with external teeth that can be adapted to the gear along the axial direction.

[0051] Preferably, the first driving element is a worm;

[0052]The second driving element is a worm gear adapted to the worm.

[0053] Preferably, the drive belt 4 is used for transmission between the first drive element and the second drive element;

[0054] The motor 5 drives the ball screw 1 to rotate through the matched first...

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Abstract

The invention discloses an electric power steering system which comprises a ball screw, a ball nut, a swing arm and a motor; the ball nut is matched with the ball screw, is restricted from rotating circumferentially and can move axially along the ball screw along forward rotation and reverse rotation of the ball screw; external teeth arranged at one end of the swing arm are meshed with external teeth arranged on the periphery of the ball nut, so that the other end of the swing arm can swing along the axial movement of the ball nut; the motor is used for driving the ball screw to rotate; the ball screw is connected with a steering wheel. According to the electric power steering system, the structure is simple, and the assembly is flexible.

Description

technical field [0001] The invention relates to automobile steering technology, in particular to an electric power steering system. Background technique [0002] In order to reduce the operating force of the driver's action on the steering wheel (also called the steering wheel), it is necessary to use external power to generate steering assist force, and the device that uses external power to generate steering assist force is called a steering assist device. [0003] There are three common types of power steering: mechanical hydraulic power steering, electronic hydraulic power steering, and electric power steering. [0004] Mechanical hydraulic power steering system, the main components are hydraulic pump, oil pipe, pressure fluid control valve, V-shaped transmission belt, oil storage tank and so on. This power assist method is to convert part of the engine power output into hydraulic pump pressure, and apply auxiliary force to the steering system to turn the tires. Accord...

Claims

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Application Information

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IPC IPC(8): B62D5/04
Inventor 杰克陈
Owner ADVANCED MICRO ELECTRONIS CO LTD
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