KR20120103909A - Steering device for vehicle - Google Patents

Steering device for vehicle Download PDF

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Publication number
KR20120103909A
KR20120103909A KR1020110021863A KR20110021863A KR20120103909A KR 20120103909 A KR20120103909 A KR 20120103909A KR 1020110021863 A KR1020110021863 A KR 1020110021863A KR 20110021863 A KR20110021863 A KR 20110021863A KR 20120103909 A KR20120103909 A KR 20120103909A
Authority
KR
South Korea
Prior art keywords
tie rod
steering
motor
vehicle
wheel
Prior art date
Application number
KR1020110021863A
Other languages
Korean (ko)
Inventor
최원혁
Original Assignee
현대모비스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020110021863A priority Critical patent/KR20120103909A/en
Publication of KR20120103909A publication Critical patent/KR20120103909A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D15/00—Steering not otherwise provided for
    • B62D15/02—Steering position indicators ; Steering position determination; Steering aids
    • B62D15/021—Determination of steering angle
    • B62D15/0215—Determination of steering angle by measuring on the steering column
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D15/00—Steering not otherwise provided for
    • B62D15/02—Steering position indicators ; Steering position determination; Steering aids
    • B62D15/027—Parking aids, e.g. instruction means
    • B62D15/0285—Parking performed automatically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/06—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins
    • B62D7/08—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in a single plane transverse to the longitudinal centre line of the vehicle
    • B62D7/10—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in a single plane transverse to the longitudinal centre line of the vehicle with single-output steering gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/06—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins
    • B62D7/14—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D9/00—Steering deflectable wheels not otherwise provided for
    • B62D9/005—Emergency systems using brakes for steering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

The present invention can be applied as an auxiliary steering device to the rear wheel, etc., the steering wheel ratio does not need to be large, the steering radius can be reduced, the lane can be changed quickly, easily and stably, the steering of the vehicle that can provide the convenience of driving operation In order to provide a device, a motor capable of bidirectional rotation and having a motor shaft, an inner tie rod connected integrally to both ends of the motor shaft, an outer tie rod connected to a knuckle coupled with a wheel, and an inner tie rod And a motion switching device for converting the rotational motion into the linear motion of the outer tie rod.

Description

Steering device for vehicle

The present invention relates to a steering apparatus of a vehicle, and more particularly to a steering apparatus of a vehicle for steering a vehicle by moving a tie rod using a motor from side to side.

Background Art A conventional power steering apparatus has been widely applied to assist a steering operation force of a steering wheel operated by a driver so that convenient steering operation and quick steering are achieved.

The conventional power steering apparatus as described above typically uses hydraulic pressure to assist the driver's steering control force. The hydraulic power steering apparatus receives the operating force of the steering wheel through the pinion gear and moves the vehicle in the width direction of the vehicle. A gear box having a rack bar which is possibly installed, an inner tie rod installed to protrude left and right from both ends of the gear box, an outer tie rod fitted with the inner tie rod and engaged with a knuckle connected to the wheel, the gear box In order to hydraulically assist the left and right movement of the rack bar within the hydraulic pump is provided with a pump for supplying pressure to the gear box.

Accordingly, when the driver manipulates the steering wheel to steer the vehicle, the operating force is transmitted to the pinion gear through the steering column, and the pinion gear rotates to move the rack bar engaged with it in the left and right width directions of the vehicle, As the rack bar operates the knuckle through the inner tie rods and the outer tie rods connected thereto, the wheels are steered in the direction desired by the driver.

However, the conventional power steering apparatus as described above has a drawback that it is not suitable for use as a steering apparatus of the rear wheel due to the large number of parts and the complicated structure.

Accordingly, the present invention has been devised in view of the above circumstances, and can be applied as an auxiliary steering device to a part of the rear wheel or the like which does not need to have a large steering gear ratio, thereby reducing the steering radius, and changing a lane quickly, easily, and stably. It is an object of the present invention to provide a steering device for a vehicle that can provide convenience of operation.

The present invention for achieving the above object, the bidirectional rotation and the motor having a motor shaft, the inner tie rod connected to each end of the motor shaft integrally connected, the outer tie rod connected to the knuckle coupled with the wheel And a movement switching device for converting the rotational movement of the inner tie rod to the linear movement of the outer tie rod.

Preferably the motion conversion device is characterized in that the ball screw.

Both ends of the motor shaft are connected via the inner tie rod and the universal joint.

A motor control unit is provided to control the operation of the motor, and the motor control unit is connected to a sensor for detecting an operation direction and an operation amount of the steering wheel, and the motor control unit is configured to correspond to the operation of the steering wheel. And to control the operation.

According to the steering apparatus of the vehicle according to the present invention, the inner tie rod is integrally connected to the motor shaft and the outer tie rod is connected to the inner tie rod through a motion switching device such as a screw for converting the rotational movement into a linear motion. The outer tie rod is coupled to a knuckle connected to a wheel, and when the motor shaft rotates, the inner tie rod rotates integrally with the motor shaft, and the rotational movement of the inner tie rod is transferred through the motion switching device. The linear tie is switched so that the outer tie rod moves linearly from side to side. The linear tie of the outer tie rod is transmitted to a knuckle connected to the wheel, and the wheel is steered in a direction desired by the driver. When applied to the rear wheels of a vehicle, the steering radius is reduced when the vehicle is turned or parked. The operation convenience of the vehicle is improved, and when the lane is suddenly changed while driving, the rear wheel can be steered in the same direction along with the front wheel, so that the steering is quick and the driving stability of the vehicle is improved. The weight and cost can be reduced, and the convenience and stability can be improved in connection with the automatic parking system and the ESP.

1 is a cross-sectional view of a steering apparatus of a vehicle according to the present invention;
2 is an explanatory diagram of a turning radius of a vehicle using a steering apparatus according to the present invention;
3 is an explanatory view when changing lanes of a vehicle using a steering apparatus according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to the accompanying drawings.

1 shows a configuration of a steering apparatus according to the present invention in cross section, that is, the motor 1 is accommodated and installed in the housing 2 at an appropriate portion of the vehicle body along the width direction of the vehicle. (1) is provided to extend left and right in the width direction of the vehicle of the motor shaft (3).

Universal joints 4 are mounted at both ends of the motor shaft 3, and one end of the inner tie rod 5 is integrally rotated to the universal joint 4.

One end of the outer tie rod 6 is connected to the other end of the inner tie rod 5 via a motion switching device, and the other end of the outer tie rod 6 has a ball joint 7 mounted thereon. 7 is to be coupled to a knuckle connected to a wheel not shown.

The movement switching device is a device for converting the rotational movement of the inner tie rod 5 into the linear movement of the outer tie rod 6, for example, may be configured as a ball screw.

That is, a screw is formed on an outer circumferential surface of the inner tie rod 5, and a screw is formed on the inner side of the outer tie rod 5 so that the outer tie rod 6 is rotated when the inner tie rod 5 rotates. Will make a linear movement from side to side.

Accordingly, when power is applied and operated to the motor 1, the motor shaft 3 rotates, and the rotational movement of the motor shaft 3 is transmitted to the inner tie rod 5 through the universal joint 4. The inner tie rod 5 rotates together with the motor shaft 3 integrally, and the rotational movement of the inner tie rod 5 is transmitted to the outer tie rod 6 through the motion switching device. As the outer tie rod 6 is moved left or right in accordance with the rotation direction of the motor shaft, the wheel is rotated as the knuckle is operated.

In order to control the operation of the motor 1, a motor control unit is connected to the motor, and a sensor for detecting an operation direction of the steering wheel is connected to the motor control unit to control the direction and the amount of operation of the steering wheel. The rear wheel may be configured to be steered by the unit sensing and applying a corresponding control current to the motor.

When turning the vehicle in a state in which the steering apparatus of the present invention configured as described above is applied to the rear wheel, as shown in FIG. 2, the rear wheel is also steered by the motor control unit together with steering of the front wheel by the driver. Since the radius is reduced, the turning radius becomes smaller and convenient when parking the vehicle or making a U-turn.

In addition, when the lane is suddenly changed while driving the vehicle, as shown in FIG. 3, the rear wheel is also steered by the motor control unit in the same direction as the front wheel according to the driver's steering wheel operation. This can be changed quickly, and at this time, the yaw motion does not occur, so that the driving stability of the vehicle is improved.

On the other hand, it is possible to provide convenience of parking by connecting the automatic parking system to the motor control unit, and by connecting the ESP (Electronic Stability Program) program, the driving stability of the vehicle can be improved.

1-motor 2-housing
3-motor shaft 4-universal joint
5- Inner Tie Rod 6- Outer Tie Rod
7-ball joint

Claims (5)

An outer tie rod capable of bidirectional rotation and having a motor shaft, an inner tie rod integrally connected to both ends of the motor shaft, an outer tie rod connected to a knuckle coupled with a wheel, and a rotational movement of the inner tie rod, Steering device for a vehicle having a motion switching device for switching the linear motion of the road. The steering apparatus of the vehicle according to claim 1, wherein the movement switching device is a ball screw. The steering apparatus of claim 1, wherein both ends of the motor shaft are connected through the inner tie rod and the universal joint. The motor control unit of claim 1, wherein a motor control unit is provided to control the operation of the motor, and the motor control unit is connected to a sensor that detects an operation direction and an operation amount of the steering wheel, and controls the motor in response to the operation of the steering wheel. And a unit adapted to control the operation of the motor. The steering apparatus of claim 4, wherein the motor control unit is connected to an automatic parking system or an ESP.
KR1020110021863A 2011-03-11 2011-03-11 Steering device for vehicle KR20120103909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110021863A KR20120103909A (en) 2011-03-11 2011-03-11 Steering device for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110021863A KR20120103909A (en) 2011-03-11 2011-03-11 Steering device for vehicle

Publications (1)

Publication Number Publication Date
KR20120103909A true KR20120103909A (en) 2012-09-20

Family

ID=47111694

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110021863A KR20120103909A (en) 2011-03-11 2011-03-11 Steering device for vehicle

Country Status (1)

Country Link
KR (1) KR20120103909A (en)

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Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application