KR100252276B1

KR100252276B1 - Brake lock

Info

Publication number: KR100252276B1
Application number: KR1019960071878A
Authority: KR
Inventors: 최훈
Original assignee: 정몽규; 현대자동차주식회사
Priority date: 1996-12-24
Filing date: 1996-12-24
Publication date: 2000-04-15
Also published as: KR19980052853A

Abstract

PURPOSE: A brake locking prevent device is provided to reduce brake pressure attaching a brake shoe to a drum by being delivered to a wheel cylinder through an oil line in braking and to prevent a perfect locking by supplying periodic rub friction repeatedly locking and releasing the brake shoe and the drum in pressing a brake pedal. CONSTITUTION: An open unit adjusts brake pressure by opening or closing a passage of an oil line according to actuation of a motor(40) in pressing a brake pedal. The open unit comprises a rotating shaft(50) forming a horizontal oil passage(55) by being protruded on the motor and an oiltight pipe(60) installing the rotating shaft on the passage of the oil line by receiving the oil passage. The open unit unlocks the oil line by placing the oil line on the same line of the oil passage as the rotating shaft of the motor is rotated. The open unit locks the oil line by placing the oil line on the same line of a face not forming the oil passage to decelerate and stop the vehicle.

Description

Brake locking device

본 발명은 주행 중의 자동차를 감속 또는 정지시키고 정차 상태를 유지하는 발 브레이크(이하 브레이크라 함)에 관한 것으로서, 특히 브레이킹시 차륜에 가해지는 제동 압력을 가감하여 차륜의 완전한 구속을 방지하는 브레이크 잠김방지 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foot brake (hereinafter referred to as a brake) that decelerates or stops a vehicle while driving and maintains a stopped state. In particular, the present invention relates to a brake lock prevention that prevents the wheel from being completely restrained by reducing the braking pressure applied to the wheel during braking. Relates to a device.

일반적으로 차량용 브레이크는 브레이크 페달을 밟으면 매스터실린더 내의 피스톤이 내장된 오일을 오일라인을 통해 휘일실린더에 압송한다. 이때 휘일실린더에서는 그 유압으로 피스톤이 브레이크슈우를 드럼에 지속적으로 압착하여 회전속을 갖는 차륜의 타이어와 노면 사이에 마찰력을 발생하여 주행중의 차량에 제동력을 가하게 된다.In general, a vehicle brake presses a brake pedal and pumps oil containing a piston in the master cylinder to a wheel cylinder through an oil line. At this time, in the wheel cylinder, the piston continuously presses the brake shoe to the drum by the hydraulic pressure, and generates friction force between the tire of the wheel having the rotational speed and the road surface to apply a braking force to the vehicle while driving.

그러나 상기한 종래의 유압식 브레이크는 브레이크 페달의 가압 상태에서 브레이크슈우와 드럼이 지속적으로 밀착함으로써 급 브레이크를 작동시키면 차륜이 록 상태를 유지하여 조향을 하더라도 의도하는 방향으로 자동차가 진행되지 않고, 또한 마찰 손실인 슬립이 발생하여 제동 정지 거리가 길어져 위험한 문제점이 있었다.However, in the conventional hydraulic brake, the brake shoe and the drum are in close contact with the brake pedal under constant pressure, so that when the brake is operated, the vehicle does not proceed in the intended direction even when the wheel is locked and steered. Loss of slip occurred and the braking stopping distance was long, which caused a dangerous problem.

특히 타이어의 마찰계수가 작은 빗길이나 빙상 또는 눈위와, 코너링시 상기한 문제점이 더욱 부가된다.In particular, the above problems are further added to corners, ice sheets or snow, where the friction coefficient of the tire is small.

이에 어떠한 조건에서도 안정성을 보유하여 충분한 제동력을 갖도록 브레이크 성능을 확보함은 자동차의 고성능화에 의한 현재의 추세에 있어서 중요한 관건이 된다.Therefore, securing the brake performance to have sufficient braking force by maintaining stability under any conditions is an important key in the current trend due to the high performance of automobiles.

본 발명은 상기한 문제점을 해결하기 위하여 안출한 것으로서, 본 발명의 목적은 브레이킹시 오일라인을 통해 휘일실린더에 압송되어 브레이크슈우를 드럼 에 압착하는 제동 압력을 가감하여 브레이크 페달의 가압 상태에서 브레이크슈우와 드럼간에 구속과 해제를 반복하는 주기적 마찰을 갖도록하여 브레이킹시 완전한 구속이 방지되는 브레이크 잠김방지 장치를 제공하는 데 있다.The present invention has been made to solve the above problems, an object of the present invention is to press the brake shoes in the pressurized state of the brake pedal by depressing the braking pressure to be pressed into the wheel cylinder through the oil line during braking to press the brake shoes to the drum The present invention provides a brake lock preventing device that prevents full restraint during braking by having periodic friction repeating restraint and release between the right drum and the drum.

도 1은 본 발명의 잠김방지 장치를 적용한 브레이크의 구성을 나타낸 요부도.1 is a main view showing the configuration of the brake to which the locking device of the present invention is applied.

도 2는 도1에 적용한 브레이크 잠김방지 장치의 세부 구성을 나타낸 도면으 로서, 도 2(a)는 정단면도,도 2(b)는 평단면도.Figure 2 is a view showing a detailed configuration of the brake lock preventing device applied to Figure 1, Figure 2 (a) is a front sectional view, Figure 2 (b) is a plan sectional view.

* 도면의주요부분에대한부호의설명 *Explanation of symbols on the main parts of the drawing

10 : 브레이크 페달 20 : 매스터실린더10: brake pedal 20: master cylinder

30 : 오일라인 40 : 전동기30: oil line 40: electric motor

50 : 회전축 55 : 유로공50: rotation axis 55: euro ball

60 : 유밀관60: oil tight tube

상기 목적을 실현하기 위한 본 발명의 실시예를 첨부한 도면 도 1과 도 2를 참조하여 상세히 설명하면 다음과 같다.DETAILED DESCRIPTION OF THE EMBODIMENTS Embodiments of the present invention for realizing the above object will be described in detail with reference to FIGS. 1 and 2 as follows.

도면에서 본 발명은 브레이크 페달(10)의 가압에 따라 매스터실린더(20)의 오일이 오일라인(30)을 통해 휘일실린더에 압송되어 브레이크슈우를 드럼에 압착하는 제동압력에 의해 브레이킹이 이루어지는 통상의 브레이크 장치에 있어서, 상기 오일라인(30)의 경로를 전동기(40)의 작동에 의해 개로 및 폐로하여 제동 압력을 가감하는 개폐수단을 특징적 구성으로 한다.In the drawings, according to the present invention, the oil of the master cylinder 20 is pressurized to the wheel cylinder through the oil line 30 according to the pressurization of the brake pedal 10, and thus braking is performed by a braking pressure for pressing the brake shoe to the drum. The brake device is characterized in that the opening and closing means for opening and closing the path of the oil line 30 by the operation of the electric motor 40 to reduce the braking pressure.

상기 개폐수단은 도 2에 나타낸 바와 같이 전동기(40)에서 돌설되어 횡방향의 유로공(55)을 형성한 회전축(50)과, 상기 유로공(55)을 수용하여 회전축(50)을 오일라인(30)의 경로에 기밀히 장착하는 유밀관으로 구성한다.As shown in FIG. 2, the opening and closing means is rotatably formed in the electric motor 40 to form a transverse flow path hole 55, and the flow path hole 55 accommodates the rotation shaft 50 to the oil line. It consists of an oiltight tube which is airtightly mounted in the path of (30).

그리고 상기 전동기(40)는 브레이크 페달(10)에 가해지는 압력에 따라 온 상태를 유지하여 회전축(50)이 초당 15 ∼20회의 회전력을 갖게하고, 압력의 해제에 따라 오프되도록 제어부와 전기적으로 연결한다.In addition, the electric motor 40 maintains an on state according to the pressure applied to the brake pedal 10 so that the rotating shaft 50 has 15 to 20 rotational power per second, and is electrically connected to the controller so that the rotating shaft 50 is turned off when the pressure is released. do.

상기 구성에 의한 본 발명의 작용 및 효과를 설명하면 다음과 같다.Referring to the operation and effects of the present invention by the above configuration is as follows.

브레이크 페달(10)을 소정 압력으로 밟으면 통상의 방식대로 매스터실린더(20)의 피스톤이 내장된 오일을 오일라인(30)을 통해 휘일실린더에 압송함과 동시에 제어부의 단속에 따라 본 발명에 적용한 전동기(40)가 작동하여 오일경로상의 회전축(50)이 회전한다.When the brake pedal 10 is pressed at a predetermined pressure, the motor in which the piston of the master cylinder 20 is built is pumped to the wheel cylinder through the oil line 30 in the usual manner, and at the same time, the electric motor applied to the present invention according to the control of the control unit. 40 is operated to rotate the rotating shaft 50 on the oil path.

회전축(50)은 유로공(55)과 오일라인(30)이 동선상에 위치하여 오일라인(30)을 개로하는 상태와, 유로공(55)이 형성되지 않은 면이 오일라인(30)과 동선상에 위치하여 오일라인(30)을 폐로하는 상태를 초당 15 ∼20회로 회전하는 과정에서 30 ∼40회의 교번적 연결과정으로 이루어 진다.The rotary shaft 50 is a state in which the oil path 30 and the oil line 30 are located on the same line, and the oil line 30 is opened, and the surface where the oil hole 55 is not formed is the oil line 30. Positioned on the copper wire in the process of rotating the oil line 30 closed 15 to 20 times per second is made of 30 to 40 alternating connection process.

즉, 회전축(50)의 유로공(55)과 오일라인(30)이 동선상에 위치하여 오일라인(30)이 개로되면 매스터실린더(20)에서 공급된 오일은 오일라인(30)을 통과하는 과정에서 유로공(55)을 통과하면서 휘일실린더에 오일 압력을 가하여 브레이크슈우와 드럼간에 제동압력, 즉 상호간을 압착시켜 차륜을 제동한다.That is, when the oil path 30 of the rotary shaft 50 and the oil line 30 are located in the same line and the oil line 30 is opened, the oil supplied from the master cylinder 20 passes through the oil line 30. During the process, the oil pressure is applied to the wheel cylinder while passing through the passage hole 55 to brake the brake shoe and the drum, that is, to mutually brake the wheels.

아울러 유로공(55)이 형성되지 않은 회전축(50)면이 오일라인(30)의 동선상에 위치하여 오일라인(30)이 폐로되면, 매스터실린더(20)에서 공급된 오일은 오일라인(30)을 통과하는 과정에서 차단되어 휘일실린더의 오일 압력이 떨어져 브레이크슈우와 드럼간에 제동압력이 해제되어 상호간에 이격된다.In addition, when the oil line 30 is closed due to the rotation shaft 50 having no flow path 55 formed on the copper line of the oil line 30, the oil supplied from the master cylinder 20 is the oil line 30. In the process of passing through), the oil pressure of the wheel cylinder is lowered and the brake pressure is released between the brake shoe and the drum to be separated from each other.

따라서 상기 방식에 의해 브레이킹시 차륜의 제동 및 해제 상태가 주기적으로 반복되면서 차량이 감속 및 정지하게 되어 차륜의 완전한 구속을 방지한다.Accordingly, the braking and releasing states of the wheels are periodically repeated during braking, thereby decelerating and stopping the vehicle, thereby preventing the wheels from being completely restrained.

이에 조향성의 안전과 바퀴와 노면과의 마찰손실인 슬립이 최소화되어 제동 정지 거리가 종래 대비 15 ∼30％가 짧아지는 효과가 있다.This minimizes the steering safety and the slip loss of the friction between the wheel and the road surface has the effect that the braking stop distance is 15-30% shorter than the conventional.

내용없음No content

Claims

In a brake device in which the oil of the master cylinder is pressurized by the brake pedal to the wheel cylinder through the oil line and braked by the braking pressure for pressing the brake shoe onto the drum. The path of the oil line is controlled by an electric motor. A brake lock preventing device, characterized in that it is composed of opening and closing means for opening and closing the braking pressure.

2. The brake according to claim 1, wherein the opening and closing means comprises a rotary shaft protruding from the electric motor to form a transverse flow path hole, and an oiltight tube receiving the flow path hole to hermetically mount the rotary shaft in a path of an oil line. Antilocking device.

3. The brake lock preventing device according to claim 2, wherein the electric motor is connected to the control unit so as to be kept in an on state according to the pressure applied to the brake pedal and to be turned off when the pressure is released.