KR20020052258A

KR20020052258A - A Damper for Improving Steering

Info

Publication number: KR20020052258A
Application number: KR1020000081497A
Authority: KR
Inventors: 박병일
Original assignee: 이계안; 현대자동차주식회사
Priority date: 2000-12-26
Filing date: 2000-12-26
Publication date: 2002-07-04

Abstract

PURPOSE: A steering improvement damper is provided to improve steering of a steering gear, and to reduce impact from the road surface by installing the damper in a feed tube supplying oil to left and right cylinders of the steering gearbox. CONSTITUTION: A damper(7) is installed in a feed tube(1), and pressure oil is passed through the damper. The damper is composed of a washer, a spring, a retainer, disk S valves, and a piston. Plural inner holes are formed in the piston, and a slit is formed in the disk S valve. First damping force is generated in plural inner holes in streaming oil from the gearbox valve through the damper during flowing oil from a right cylinder of the steering gearbox to a left cylinder. Second damping force is generated with deforming the disk valve momentarily in moving oil through the slit. Steering is improved, and impact from the road surface is minimized with adding the damper in the feed tube.

Description

A Damper for Improving Steering

본 발명은 차량에 설치되는 스티어링 기어에 관한 것으로, 특히 스티어링 기어 박스의 좌우 실린더에 오일을 공급해 주는 피드 튜브에 추가설치하여 조타시 오일이 댐퍼를 통과하면서 감쇄력을 발생시키도록 된 조타감 향상을 위한 댐퍼에 관한 것이다.The present invention relates to a steering gear installed in a vehicle, and in particular, in addition to the feed tube for supplying oil to the left and right cylinders of the steering gear box to improve the steering feeling to generate a damping force while the oil passes through the damper during steering It is about a damper.

일반적으로 차량 주행시 운전자가 핸들을 조작하게 되면 핸들 회전방향에 따라 스티어링 기어박스에 설치된 좌우측 실린더에서 압유가 피드튜브를 통해 이동하면서 원할한 핸들조작을 유도하도록 되어 있다.In general, when the driver operates the steering wheel while driving the vehicle, the hydraulic oil is moved through the feed tube in the left and right cylinders installed in the steering gear box according to the steering direction to induce a smooth steering operation.

한편 최근 들어 차량이 고급화/대형화 되면서 여러가지 부가적인 장치를 추가하므로써 각종 성능을 향상시키고 있으나 핸들의 조타성을 향상시키기 위한 장치는 실용화되어 있지 않은 실정이다.On the other hand, in recent years, as vehicles are advanced / large in size, various additional devices have been added to improve performance, but devices for improving steering steering have not been put to practical use.

이에 본 발명은 상기와 같은 필요성을 감안하여 발명된 것으로, 스티어링 기어 박스의 좌우 실린더에 오일을 공급해 주는 피드 튜브에 댐퍼를 추가설치하여 스티어링 기어의 조타감을 향상시키고 지면으로 부터 전달되는 충격을 최소화시키도록 된 조타감 향상을 위한 댐퍼를 제공함에 그 목적이 있다.Therefore, the present invention was invented in view of the necessity as described above, and by adding a damper to the feed tube for supplying oil to the left and right cylinders of the steering gear box, the steering gear is improved and the impact transmitted from the ground is minimized. The purpose is to provide a damper for improving the steering feel.

상기와 같은 목적을 달성하기 위한 본 발명은, 와셔와 스프링, 리테이너, 서로 다른 크기로 형성된 디스크 S 밸브, 디스크 및, 내/외측홀을 갖춘 피스톤을 구비하고서 피드튜브에 연결장착되어, 이 피드튜브를 통해 이동되는 압유가 경유되도록 되어 있다.The present invention for achieving the above object is provided with a washer, a spring, a retainer, a disk S valve formed in different sizes, a disk, and a piston having an inner / outer hole, which is connected to a feed tube, and the feed tube The pressure oil that is moved through is intended to pass through.

도 1은 본 발명에 따른 댐퍼가 설치된 스티어링기어의 개략 사시도,1 is a schematic perspective view of a steering gear equipped with a damper according to the present invention;

도 2는 본 발명에 따른 댐퍼의 유체흐름을 설명하기 위한 개략 단면도,Figure 2 is a schematic cross-sectional view for explaining the fluid flow of the damper according to the present invention,

도 3은 본 발명에 따른 댐퍼의 분해사시도,3 is an exploded perspective view of a damper according to the present invention;

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

1 --- 피드튜브, 2 --- 와셔,1 --- feed tube, 2 --- washer,

3 --- 스프링, 4 --- 리테이너,3 --- springs, 4 --- retainers,

5,15 --- 디스크 S 밸브, 6 --- 피스톤,5,15 --- disc S valve, 6 --- piston,

7 --- 댐퍼, 8 --- 실린더,7 --- damper, 8 --- cylinder,

9 --- 실린더, 10 --- 내측홀,9 --- cylinder, 10 --- inner hole,

11 --- 슬릿, 14 --- 외측홀11 --- slit, 14 --- outer hole

이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 댐퍼가 설치된 스티어링기어의 개략 사시도이고, 도 2는 본 발명에 따른 댐퍼의 유체흐름을 설명하기 위한 개략 단면도이며, 도 3은 본 발명에 따른 댐퍼의 분해사시도로써, 피드튜브(1)에 와셔(2)와 스프링(3)와, 리테이너(4), 서로 다른 크기로 형성된 디스크 S 밸브(5,15), 디스크(17) 및, 피스톤(6)을 구비한 댐퍼(7)가 장착되어 피드튜브(1)를 통해 이동되는 압유가 이 댐퍼(7)를 경유하도록 되어 있다.1 is a schematic perspective view of a damper equipped with a damper according to the present invention, Figure 2 is a schematic cross-sectional view for explaining the fluid flow of the damper according to the present invention, Figure 3 is an exploded perspective view of the damper according to the present invention, the feed Damper with washer (2), spring (3), retainer (4), disc S valves (5, 15), disc (17), and piston (6) formed in different sizes in the tube (1). 7) is mounted so that the pressurized oil moving through the feed tube 1 passes through the damper 7.

따라서, 스티어링기어박스의 우측에 설치된 실린더(8)로 부터 좌측에 위한 실린더(9)로 오일이 흐르는 경우에는, 스티어링 조타시 기어박스의 밸브를 통과한 오일이 튜브(1)내에 설치된 댐퍼(7)를 통과할 때 피스톤(6)에 형성된 복수의 내측홀(10)에서 1차 감쇄력을 발생시키고, 다시 디스크 S 밸브(5)에 형성된 슬릿(11)을 통과함과 동시에 박판형태로 된 디스크밸브(5)를 순간변형시키면서 2차로 감쇄력을 발생시키게 된다.Therefore, when oil flows from the cylinder 8 installed on the right side of the steering gear box to the cylinder 9 on the left side, the oil passing through the valve of the gear box during steering steering dampers 7 installed in the tube 1. ), The primary damping force is generated in the plurality of inner holes 10 formed in the piston 6, and passes through the slit 11 formed in the disk S valve 5, and at the same time, a disk valve having a thin plate shape. The momentary deformation of (5) generates attenuation force in the second order.

그리고, 스티어링기어박스(8)의 좌측에 설치된 실린더(9)로 부터 우측에 위한 실린더(8)로 오일이 흐르는 경우에는, 스티어링 조타시 기어박스의 밸브를 통과한 오일이 튜브(1)내에 설치된 댐퍼(7)를 통과할 때 피스톤(6)에 형성된 복수의 외측홀(14)에서 1차로 저항을 받아 감쇄력을 발생시키고, 다시 크기가 상대적으로 큰 디스크 S 밸브(15)에 형성된 슬릿(11)을 통과함과 동시에 디스크 S 밸브(15)를 순간변형시키면서 2차로 감쇄력을 발생시키게 된다.When oil flows from the cylinder 9 installed on the left side of the steering gear box 8 to the cylinder 8 on the right side, oil passing through the valve of the gearbox during steering steering is installed in the tube 1. When passing through the damper 7 receives a first resistance in the plurality of outer holes 14 formed in the piston 6 to generate the damping force, and again the slit 11 formed in the relatively large disk S valve 15 At the same time, the damping force is generated secondly while the disk S valve 15 is momentarily deformed.

따라서, 스티어링 휠 조타시 기어박스의 토오션 바아의 비틀림에 의해 결정되는 기어박스밸브의 특성 뿐 아니라 피드튜브내에 설치된 댐퍼의 감쇄특성으로 인해 조타감을 향상시킬 수 있게 된다.Therefore, the steering feeling can be improved due to the attenuation characteristics of the damper installed in the feed tube as well as the characteristics of the gearbox valve determined by the torsion bar of the gearbox when steering the steering wheel.

특히 기존에 사용되고 있는 파워스티어링 기어는 조타 후 원위치될 때 히스테리시스에 의한 조타력저하 현상이 발생하였으나, 본 발명에 따른 댐퍼를 튜브에 적용하게 되면 이를 방지할 수 있게 된다.In particular, the power steering gear used in the prior art, the steering force degradation phenomenon due to hysteresis when the original position after the steering, but when the damper according to the present invention is applied to the tube can be prevented.

또한 본 발명을 스티어링장치에 적용하면 예컨데 노면조건에 따른 충격이나 진동등이 타이어를 통해 핸들로 전달될 때 운전자의 의지와 관계없이 핸들이 돌아가는 현상도 방지할 수 있어 사용성을 향상시킬수 있게 된다.In addition, when the present invention is applied to a steering device, for example, when a shock or vibration caused by road conditions are transmitted to a steering wheel through a tire, the steering wheel can be prevented from turning regardless of the driver's intention, thereby improving usability.

이상 설명한 바와 같이 본 발명에 따르면, 스티어링 기어 박스의 좌우 실린더에 오일을 공급해 주는 피드 튜브에 댐퍼를 추가설치하여 이 댐퍼에서 감쇄력을 발생시키도록 하므로써 스티어링 기어의 조타감을 향상시키는 한편, 지면으로 부터 핸들로 전달되는 충격도 최소화할 수 있도록 되어 있다.As described above, according to the present invention, by providing a damper to the feed tube for supplying oil to the left and right cylinders of the steering gear box to generate a damping force in the damper to improve the steering feel of the steering gear, the handle from the ground It is also designed to minimize the shock to the car.

Claims

Washers, springs, retainers, disc S valves of different sizes, pistons, and pistons with inner and outer holes, which are connected to the feed tube for improved steering feel through the pressurized oil moving through the feed tube Damper.