CN202243633U

CN202243633U - Electric steering device with automatic aligning function for automobile

Info

Publication number: CN202243633U
Application number: CN2011203384791U
Authority: CN
Inventors: 陈力; 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: 2012-05-30
Anticipated expiration: 2021-09-09

Abstract

The utility model relates to an electric steering device with an automatic aligning function for an automobile, belonging to the technical field of electric steering systems for automobiles. The electric steering device comprises an input shaft, a gear shaft, an angle torque sensor, a worm wheel, a torsion bar and the like, wherein the angle torque sensor consists of two detection rotors and a detection control plate; a detector rotor and a detection control plate are arranged on the input shaft; and another detection rotor and the worm wheel are arranged on the gear shaft. In the electric steering device, the angle torque sensor is used for generating an angle control signal through the rotation of the gear shaft and the input shaft for controlling relevant circuits to work, so that an accurate automatic aligning function is realized, and an angle signal and a port are provided for an automatic parking device simultaneously; and by using the electric steering device together with a traveling radar on the automobile, an automatic parking function of the automobile can be realized. The problems of low accuracy, easiness in wearing, unstable control signals and poor steering and aligning effects existing in the conventional electric steering device for an automobile are solved. The driving safety and comfort are enhanced, and the electric steering device can be widely applied to electric power-assisted steering systems of automobiles.

Description

A kind of motorcar electric steering hardware with the self-aligning function

Technical field

The utility model relates to a kind of motorcar electric steering hardware with the self-aligning function, belongs to the electric power steering system of automobile technical field.

Background technology

At present, widely used electric power-assisted steering apparatus on minicar at home, the van is made up of mechanical driving part and detection of electrons control part; Wherein sensor adopts contact torque sensing (potentiometer type) and non-contact torque sensor (not being with angle control) mostly, and motor adopts to have and brushes or brushless two kinds.Worm couple and rack-and-pinion rise to slow down and increase the transfer function of turning round, and electronic control unit has the power operated control effect of the different speed of a motor vehicle.But in use there is following problem in existing apparatus: the one, though contact torque sensor stability is good with sensitieness, precision is low, easy to wear, causes turning to, time plus effect is poor.The 2nd, though contactless torque sensor has high precision measuring device, its heat stability and poor anti jamming capability can't realize the self-aligning function.

Summary of the invention

The purpose of the utility model is, provide a kind of on gear wheel shaft and input shaft attaching the angle torque sensor is arranged, trace performance is good, precision is high, high-low temperature resistant, having can self-aligning and damping controllable function, and assembling simply; It is low, easy to wear to solve existing motorcar electric steering hardware precision, and heat stability and poor anti jamming capability cause control signal unstable and turn to, return the motorcar electric steering hardware of band self-aligning of the problem of plus effect difference.

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

The motorcar electric steering hardware of this band self-aligning function is made up of input shaft, gear wheel shaft, angle torque sensor, worm gear, torsion bar and output shaft; It is characterized in that: the angle torque sensor detects control desk by two detection rotors and PCB and forms; Attaching has the detection rotor of angle torque sensor and PCB to detect control desk on the input shaft; Gear wheel shaft left side attaching has another detection rotor of angle torque sensor, and the attaching of gear wheel shaft right side has worm gear; Input shaft, gear wheel shaft and worm gear are in aggregates through the torsion bar attaching, are connected with output shaft through spline again.

The utility model beneficial effect compared with prior art is:

The motorcar electric steering hardware of this band self-aligning function is employed in that attaching has the angle torque sensor on gear wheel shaft and the input shaft, is an integral body through torsion bar with gear wheel shaft, input shaft, angle torque sensor, worm gear attaching; Heat stability is good, and antijamming capability is strong, and precision is high, and following property is good.Solve existing motorcar electric steering hardware precision low, easy to wear and heat stability and poor anti jamming capability, caused control signal unstable and to turn to, return plus effect poor, even problem that can not self-aligning.Traveling security, stability and traveling comfort have been improved; Simultaneously for the automatic parking device provides angle signal and port, and assemble simple and conveniently, can be widely used in the automobile electric booster steering system.

Description of drawings

Fig. 1 is a kind of structural representation of the motorcar electric steering hardware with the self-aligning function;

Fig. 2 is the assembling scheme drawing of angle torque sensor;

Fig. 3 is a kind of worm and gear assembling scheme drawing of the motorcar electric steering hardware with the self-aligning function;

Fig. 4 is a kind of assembly erection plan of the motorcar electric steering hardware with the self-aligning function.

Among the figure: 1, input shaft, 2, detection rotor, 3, the angle torque sensor, 4, worm gear, 5, torsion bar, 6, gear wheel shaft; 7, angle torque sensor housing, 8, PCB detects control desk, 9, the EPS motor, 10, the tooth bar supporting base, 11, jam nut, 12, compression spring; 13, blanking cover, 14, worm screw, 15, the damping pad, 16, connect four paws, 17, steering gear housing; 18, rod assembly, 19, the tooth bar protective cover, 20, tooth bar, 21, sleeve pipe, 22, lining.

The specific embodiment

The motorcar electric steering hardware of this band self-aligning function is made up of input shaft 1, gear wheel shaft 6, angle torque sensor 3, worm gear 4, torsion bar 5 and output shaft; Angle torque sensor 3 detects control desk 8 by two detection rotors and PCB and forms; Attaching has the detection rotor of angle torque sensor 3 and PCB to detect control desk 8 on the input shaft 1; The left side attaching of gear wheel shaft 6 has another detection rotor 2 of angle torque sensor 3, and the right side attaching of gear wheel shaft 6 has worm gear 4; Input shaft 1, gear wheel shaft 6 and worm gear 4 are in aggregates through torsion bar 5 attachings, are connected with output shaft through spline again.

The detection rotor and the PCB of the motorcar electric steering hardware of this band self-aligning function detect the detection controller that control desk 8 is formed angle torque sensor 3.There are the detection rotor of angle torque sensor 3 and PCB to detect control desk 8 through attaching on the input shaft 1; Gear wheel shaft 6 left side attachings have another detection detection rotor of angle torque sensor 3; Make angle torque sensor 3 angle signal and port are provided for automobile automatic parking device; Be used in combination with the radar that goes on the automobile, can realize the automatic parking function of automobile, make things convenient for chaufeur faster in the vehicle crowded places, park exactly.

Input shaft 1 links to each other with the steering column lower drive shaft; When the steering torque that applies from bearing circle when steering column passes to input shaft 1; Elastic deformations take place through torsion bar 5 in the rotor that the rotor of attaching and PCB detect on control desk 8 and the gear wheel shaft 6 on the input shaft 1; Corner on the two rotor generation circumference is changed, and PCB detection control desk 8 converts angular rate signal into voltage change signal and exports to the ECU electronic control unit, when bearing circle rotates to the left or to the right; The corresponding increase of angle torque sensor 3 output voltages perhaps reduces, and can judge the direction of bearing circle rotation and the size of moment of torsion according to output voltage values.

After electronic control unit ECU receives the tach signal of angle torque sensor 3 voltage value signals, car speed sensor GES and engine speed sensor; The different size of current of ECU electronic control unit program output offers EPS motor 9; EPS motor 9 becomes output torque to pass to worm screw 14 electrical signal conversion under the internal magnetic field effect; Amplify assist torque and be delivered to output gear shaft 6 through worm gear 4, worm screw 14; Through tooth bar 20 engagements moment of torsion is changed zooming into tooth bar 20 axial forces at last, and turn to through two ends rod assembly 18 drive wheels.

When the speed of a motor vehicle surpassed certain speed, the ECU electronic control unit can provide the reversing sense power-assisted, made Vehicular turn sedate, the safety that becomes, and effectively reduced the unstable sensation of vehicle, increased the stability of vehicular drive.In addition, through the absolute angular signal that angle torque sensor 3 provides, the ECU electronic control unit can just return vehicle better, more accurately.

Claims

1. motorcar electric steering hardware with the self-aligning function; It is made up of input shaft (1), gear wheel shaft (6), angle torque sensor (3), worm gear (4), torsion bar (5) and output shaft; It is characterized in that: angle torque sensor (3) detects control desk (8) by two detection rotors and PCB and forms; Detection rotor and PCB that input shaft (1) is gone up attaching has angle torque sensor (3) detect control desk (8); The left side attaching of gear wheel shaft (6) has another detection rotor (2) of angle torque sensor (3), and the right side attaching of gear wheel shaft (6) has worm gear (4); Input shaft (1), gear wheel shaft (6) and worm gear (4) are in aggregates through torsion bar (5) attaching, are connected with output shaft through spline again.