KR20090100023A - A booster of brake for vehicle - Google Patents

A booster of brake for vehicle Download PDF

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Publication number
KR20090100023A
KR20090100023A KR1020080025378A KR20080025378A KR20090100023A KR 20090100023 A KR20090100023 A KR 20090100023A KR 1020080025378 A KR1020080025378 A KR 1020080025378A KR 20080025378 A KR20080025378 A KR 20080025378A KR 20090100023 A KR20090100023 A KR 20090100023A
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KR
South Korea
Prior art keywords
valve body
diaphragm
brake booster
chamber
cell
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Application number
KR1020080025378A
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Korean (ko)
Inventor
은성환
Original Assignee
주식회사 만도
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Application filed by 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020080025378A priority Critical patent/KR20090100023A/en
Publication of KR20090100023A publication Critical patent/KR20090100023A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/567—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of the casing or by its strengthening or mounting arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/57—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of control valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/573—Vacuum systems indirect, i.e. vacuum booster units characterised by reaction devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/03—Brake assistants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
    • B60T8/3255—Systems in which the braking action is dependent on brake pedal data
    • B60T8/3275—Systems with a braking assistant function, i.e. automatic full braking initiation in dependence of brake pedal velocity

Abstract

PURPOSE: A brake booster for vehicles is provided to reduce a failure rate by reducing the number of assembly processes. CONSTITUTION: A brake booster for vehicles includes a casing, a center plate, a rear diaphragm, and a valve main body. In the casing(10), a front cell(11) and a rear cell(12) are coupled. The center plate(13) divides the casing into a front room and a rear room. The rear diaphragm(18) divides the rear room into a rear constant pressure room and a rear transformation room. In the valve main body(30), one end part passes a central part of the center plate, the other end part is protruded outside the rear cell.

Description

차량용 브레이크 부스터{A Booster of Brake for Vehicle}A Booster of Brake for Vehicle

본 발명은 차량용 브레이크 부스터에 관한 것으로, 특히 차량용 브레이크 부스터의 다이어프램 고정 구조에 관한 것이다.The present invention relates to a vehicle brake booster, and more particularly, to a diaphragm fixing structure of a vehicle brake booster.

일반적으로 일반적으로 차량용 브레이크 부스터(Brake BOOSTER)는 진공과 대기압의 기압차를 이용하여 작은 힘으로 큰 제동력을 발생시키는 장치이며, 이 제동력을 마스터실린더에 전달하여 제동유압을 형성한다.In general, a brake booster for a vehicle (Brake BOOSTER) is a device that generates a large braking force with a small force by using a pressure difference between the vacuum and atmospheric pressure, and transmits this braking force to the master cylinder to form a braking hydraulic pressure.

종래의 브레이크 부스터는 도 1에 도시된 바와 같이, 프론트셀(11)과 리어셀(12)이 밀폐 결합된 케이싱(10)과, 케이싱(10) 내부를 프론트실(14)과 리어실(15)로 구획하는 센터플레이트(13)와, 일단은 센터플레이트(13)의 중심부를 미끄럼가능하게 관통하며 타단은 리어셀(12)의 개구된 중심부를 통해 돌출되게 장착되어 공기의 유입을 제어하는 밸브본체(30)와, 브레이크페달(미도시)에 의해 연동하는 입력축(50)과, 이의 작동에 따라 변위의 힘을 전달받는 출력축(70)을 구비한다.As shown in FIG. 1, the conventional brake booster includes a casing 10 in which the front cell 11 and the rear cell 12 are hermetically coupled to each other, and the front chamber 14 and the rear chamber 15 inside the casing 10. The center plate 13 which is divided into a) and one end slidably penetrates the center of the center plate 13 and the other end is mounted to protrude through the open center of the rear cell 12 to control the inflow of air. It includes a main body 30, an input shaft 50 that is interlocked by a brake pedal (not shown), and an output shaft 70 that receives a displacement force in accordance with its operation.

프론트실(14)은 프론트다이아프램(16)과 프론트파워피스톤(17)에 의해 프론트정압실(14a)과 프론트변압실(14b)로 구획되며, 리어실(15)은 리어다이아프램(18)과 리어파워피스톤(19)에 의해 리어정압실(15a)과 리어변압실(15b)로 구획된다.The front chamber 14 is divided into a front static pressure chamber 14a and a front transformer chamber 14b by the front diaphragm 16 and the front power piston 17, and the rear chamber 15 is the rear diaphragm 18. And the rear power piston 19 are divided into the rear static pressure chamber 15a and the rear transformer chamber 15b.

밸브본체(30)는 일단부 외주에 프론트다이아프램(16)과 프론트파워피스톤(17) 및 리어다이아프램(18)과 리어파워피스톤(19), 그리고 센터플레이트(13)가 결합되며, 공기흡입부(31)가 형성된 타단부는 리어셀(12)의 중심부를 관통하여 대기와 연통된다. 이러한 밸브본체(30)의 내부에는 정압실(14a,15a)과 변압실(14b,15b)을 연통하는 정압통로(32) 및 대기와 변압실(14b,15b)을 연통시키는 변압통로(33)가 형성되며, 입력축(50)의 단부가 결합되어 축방향으로 미끄럼운동하는 제1플런저(35)가 설치된다. 제1플런저(35)의 선단은 단차지게 마련되어 제2플런저(36)측으로 돌출되어 소정의 공간을 가지며 제2플런저(36)와 결합된다. 이러한 제2플런저(36)의 선단은 리액션디스크(40)가 마련된 출력축(70)과 연계된다. 또한, 입력축(50)의 작동에 따라 공기의 유입을 제어하는 탄성재질의 포펫밸브(45)가 밸브본체(30)내에 설치되어 선택적으로 정압통로(32)와 변압통로(33)를 개폐한다.The valve body 30 is coupled to the front diaphragm 16, the front power piston 17 and the rear diaphragm 18, the rear power piston 19, and the center plate 13 at one end of the outer periphery, The other end where the portion 31 is formed passes through the central portion of the rear cell 12 and communicates with the atmosphere. Inside the valve body 30, the constant pressure passage 32 for communicating the constant pressure chambers 14a and 15a and the transformer chambers 14b and 15b, and the transformer passage 33 for communicating the atmosphere and the transformer chambers 14b and 15b. Is formed, the end of the input shaft 50 is coupled is provided with a first plunger 35 sliding in the axial direction. The front end of the first plunger 35 is stepped to protrude toward the second plunger 36 to have a predetermined space and is coupled to the second plunger 36. The tip of the second plunger 36 is associated with the output shaft 70 in which the reaction disk 40 is provided. In addition, an poppet valve 45 of elastic material that controls the inflow of air according to the operation of the input shaft 50 is installed in the valve body 30 to selectively open and close the positive pressure passage 32 and the transformer passage 33.

이러한 공기의 유입을 제어하는 밸브본체(30)는 입력축(50)의 진퇴운동에 따라 정압실(14a,15a)과 변압실(14b,15b)로의 공기의 유출입이 이루어지므로 리어정압실(15a)과 리어변압실(15b)을 구획하는 리어다이아프램(18)의 기밀유지를 위하여 밸브본체(30)와 결합되는 리어다이아프램(18)의 중심부는 밸브본체(30)의 외주면과 고정되도록 설치된다.The valve body 30 for controlling the inflow of air flows in and out of the positive pressure chambers 14a and 15a and the transformer chambers 14b and 15b in accordance with the advancing and retracting motion of the input shaft 50. The central portion of the rear diaphragm 18 coupled with the valve main body 30 is installed to be fixed to the outer circumferential surface of the valve main body 30 to maintain the airtightness of the rear diaphragm 18 partitioning the rear transformer chamber 15b. .

이의 구조를 도 2를 참조하며 좀 더 자세히 설명하면 다음과 같다.The structure thereof will be described in more detail with reference to FIG. 2 as follows.

즉, 리어실(15) 내부를 리어정압실(15a)과 리어변압실(15b)로 구획하는 리어다이아프램(18)의 중심부는 원형상으로 개구되며, 리어다이아프램(18)의 개구된 단부에는 결합부(20)가 마련된다. 따라서, 리어다이아프램(18)의 결합부(20)와 밸브 본체(30)의 안착부(37)를 둘러싸도록 형성된 고정부재(23)가 리어다이아프램(18)의 결합부(20)와 밸브본체(30)의 안착부(37)를 화살표방향으로 클램핑(clamping)함에 의하여 리어다이아프램(18)을 밸브본체(30)에 고정되도록 설치한다.That is, the center of the rear diaphragm 18 which divides the inside of the rear chamber 15 into the rear positive pressure chamber 15a and the rear transformer chamber 15b is opened circularly, and the open end part of the rear diaphragm 18 is opened. The coupling part 20 is provided. Accordingly, the fixing member 23 formed to surround the engaging portion 20 of the rear diaphragm 18 and the seating portion 37 of the valve body 30 is combined with the engaging portion 20 and the valve of the rear diaphragm 18. The rear diaphragm 18 is installed to be fixed to the valve body 30 by clamping the seating portion 37 of the main body 30 in the direction of the arrow.

전술한 차량용 브레이크 부스터는 다이아프램을 밸브본체에 고정시키기 위하여 별도의 고정부재를 필요로 하게 되므로 제조원가가 상승되어 생산성이 떨어지는 문제가 있었다.The above-described vehicle brake booster requires a separate fixing member to fix the diaphragm to the valve body, thereby increasing manufacturing costs and lowering productivity.

또한, 전술한 차량용 브레이크 부스터는 리어다이아프램을 밸브본체에 고정시키기 위하여 클램핑 작업을 하는 과정에서의 제품 치수의 불균일등으로 불량률이 많아져 조립생산성이 낮은 결점이 있었다.In addition, the above-described vehicle brake booster has a drawback that the defect rate is increased due to unevenness of product dimensions during the clamping operation in order to fix the rear diaphragm to the valve body, resulting in low assembly productivity.

이에 본 발명은 상기와 같은 종래의 문제점을 해결하기 위해 제안된 것으로, 본 발명의 목적은 다이아프램을 밸브본체에 간단한 방법으로 고정하도록 하여 조립생산성 및 제품원가를 줄일 수 있는 차량용 브레이크 부스터를 제공하는데 있다.Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to provide a brake booster for a vehicle that can reduce assembly productivity and product cost by fixing the diaphragm to the valve body in a simple manner. have.

상기와 같은 목적을 달성하기 위하여 본 발명의 일 실시예에 의한 차량용 브레이크 부스터는, 프론트셀과 리어셀이 밀페결합된 케이싱과, 상기 케이싱을 프론트실과 리어실로 구획하는 센터플레이트와, 상기 리어실을 리어정압실과 리어변압실로 구획하는 리어다이아프램과, 상기 센터플레이트의 중심부를 일단부가 미끄럼가능하게 관통하며 타단은 상기 리어셀 외부로 돌출되어 공기의 유입을 제어하는 밸브본체를 포함한 차량용 브레이크 부스터에 있어서, 상기 리어다이아프램의 중앙부는 상기 밸브본체에 강제 압입되어 고정되는 것을 특징으로 한다.In order to achieve the above object, a vehicle brake booster according to an embodiment of the present invention includes a casing in which a front cell and a rear cell are hermetically coupled, a center plate for partitioning the casing into a front chamber and a rear chamber, and the rear chamber. In a vehicle brake booster including a rear diaphragm partitioned into a rear positive pressure chamber and a rear transformer chamber, and one end of the center plate slidably and the other end protrudes out of the rear cell to control the inflow of air. The central portion of the rear diaphragm is forcibly pressed into and fixed to the valve body.

또한, 본 발명의 차량용 브레이크 부스터는 상기 리어다이아프램의 중앙부에는 상기 밸브본체에 압입되는 비드부와 상기 비드부로부터 상기 리어셀측으로 연장 형성된 돌출부를 포함하고, 상기 비드부와 대응되는 상기 밸브본체의 외주에는 상기 비드부가 삽입되는 압입홈과 상기 돌출부와 대응하며 상기 밸브본체 외주면에서 외향으로 돌출된 걸림턱을 포함한다.In addition, the vehicle brake booster of the present invention includes a bead portion pressed into the valve body and a protrusion extending from the bead portion to the rear cell side at a central portion of the rear diaphragm, and corresponding to the bead portion of the valve body. The outer circumference includes a pressing groove into which the bead portion is inserted and a locking jaw protruding outwardly from the outer circumferential surface of the valve body.

또한, 본 발명의 차량용 브레이크 부스터는 상기 압입홈과 접하는 상기 비드부에는 압입고정시 상기 비드부가 상기 압입홈에 밀착되도록 엠보형상의 돌기부가 마련된 것을 특징으로 한다.In addition, the vehicle brake booster of the present invention is characterized in that the bead portion in contact with the indentation groove is provided with an embossed projection so that the bead portion is in close contact with the indentation groove when the indentation is fixed.

또한, 본 발명의 차량용 브레이크 부스터는 상기 리어다이아프램의 중앙부가 상기 밸브본체에 압입 고정되는 경우 상기 비드부는 상기 압입홈에 삽입 고정되며, 상기 돌출부는 상기 걸림턱의 외면을 감싸도록 압착 고정되는 것을 특징으로 한다.In the vehicle brake booster of the present invention, when the center portion of the rear diaphragm is press-fitted and fixed to the valve body, the bead part is inserted and fixed to the press-in groove, and the protrusion is press-fixed to surround the outer surface of the locking jaw. It features.

이상에서 살펴본 바와 같이, 본 발명에 의한 차량용 브레이크 부스터는 리어다이아프램을 밸브본체에 고정 결합시 별도의 고정부재를 삭제할 수 있어 제조원가를 저감할 수 있는 효과가 있게 된다.As described above, the vehicle brake booster according to the present invention can remove the separate fixing member when the rear diaphragm is fixedly coupled to the valve body, thereby reducing the manufacturing cost.

또한, 본 발명에 의한 차량용 브레이크 부스터는 리어다이아프램을 밸브본체에 강제 압입되어 고정하기 때문에 조립 공수가 줄어들어 조립 생산성 및 불량률을 줄일 수 있는 효과가 있게 된다.In addition, the brake booster for a vehicle according to the present invention is forcibly pressed into the valve body to fix the rear diaphragm, thereby reducing the number of assembly operations, thereby reducing assembly productivity and defect rate.

이하에서는 상기와 같은 본 발명의 차량용 브레이크 부스터의 기술적 사상에 따른 바람직한 실시 예를 첨부도면을 참조하여 설명하면 다음과 같다. Hereinafter, a preferred embodiment according to the technical spirit of the vehicle brake booster of the present invention as described above with reference to the accompanying drawings as follows.

도 3은 본 발명의 실시예에 따른 차량용 브레이크 부스터의 대략적인 구조를 보인 단면도이고, 도 4는 도 3의 'B' 부분의 확대도로서 본 발명의 실시예에 따른 리어다이아프램과 밸브본체의 결합 구조를 보인 것이다. 종래기술과 동일한 구성에 대하여는 동일한 부호를 이용하기로 한다.3 is a cross-sectional view illustrating a schematic structure of a brake booster for a vehicle according to an exemplary embodiment of the present invention, and FIG. 4 is an enlarged view of a portion 'B' of FIG. 3 and illustrates a rear diaphragm and a valve body according to an exemplary embodiment of the present invention. It shows a bonding structure. The same reference numerals are used for the same configuration as the prior art.

도 3에 도시한 바와 같이, 본 발명의 실시예에 따른 차량용 브레이크 부스터는 프론트셀(11)과 리어셀(12)이 밀폐결합된 케이싱(10)과, 케이싱(10)을 프론트실(11)과 리어실(12)로 구획하는 센터플레이트(13)와, 일단이 상기 센터플레이트(13)의 중앙에 미끄럼 이동가능하게 연결되고 타단부는 케이스 외부로 돌출되며 그 내부가 중공되어 공기흡입부(31)를 갖는 밸브본체(30)와, 밸브본체(30)의 공기흡입부(31)에 위치하여 브레이크페달(미도시)의 조작에 의한 가압력을 전달받는 입력축(50)과, 밸브본체(30)에서 발생한 배력을 마스터실린더(미도시)에 전달하는 출력축(70)을 포함하여 구성된다.As shown in FIG. 3, the vehicle brake booster according to the embodiment of the present invention includes a casing 10 in which the front cell 11 and the rear cell 12 are hermetically coupled to each other, and the casing 10 includes the front seal 11. And a center plate 13 partitioned into a rear chamber 12, one end of which is slidably connected to the center of the center plate 13, the other end of which protrudes out of the case, and the inside thereof is hollowed out so that the air suction unit ( A valve body 30 having a 31, an input shaft 50 located in the air inlet 31 of the valve body 30 to receive the pressing force by the operation of the brake pedal (not shown), and the valve body 30 It is configured to include an output shaft 70 for transmitting the power generated in the master cylinder (not shown).

프론트실(14)은 프론트다이아프램(16)에 의해 프론트정압실(14a)과 프론트변압실(14b)로 구획되고, 프론트정압실(14a)과 프론트변압실(14b)의 압력차에 의해 발생한 힘을 전달받는 프론트파워피스톤(17)이 프론트다이아프램(16)에 접하고 있다.The front chamber 14 is partitioned into the front positive pressure chamber 14a and the front transformer chamber 14b by the front diaphragm 16, and is generated by the pressure difference between the front pressure chamber 14a and the front transformer chamber 14b. The front power piston 17 receiving the force is in contact with the front diaphragm 16.

또한, 프론트다이아프램(16)과 프론트파워피스톤(17)의 중앙은 밸브본체(30) 에 고정된다.In addition, the center of the front diaphragm 16 and the front power piston 17 is fixed to the valve body 30.

리어실(15)은 리어다이아프램(18)에 의해 리어정압실(15a)과 리어변압실(15b)로 구획되고, 리어정압실(15a)과 리어변압실(15b)의 압력차에 의해 발생한 힘을 전달받는 리어파워피스톤(19)이 리어다이아프램(18)에 접하고 있다.The rear chamber 15 is partitioned into the rear positive pressure chamber 15a and the rear transformer chamber 15b by the rear diaphragm 18, and is generated by the pressure difference between the rear positive pressure chamber 15a and the rear transformer chamber 15b. The rear power piston 19 that receives the force is in contact with the rear diaphragm 18.

도 4를 참조하면, 본 발명의 주요한 특징부인 리어다이아프램(18)의 중앙부에는 밸브본체(30)에 압입되는 비드부(100)가 마련된다. 이러한 비드부(100)에는 밸브본체(30)와의 압입 고정시 실링성을 강화하기 위하여 비드부(100)의 밸브본체(30)와 접하는 내면에는 엠보 형상의 돌기부(101)가 마련된다.Referring to FIG. 4, a bead portion 100 press-fitted to the valve body 30 is provided at the center portion of the rear diaphragm 18, which is a major feature of the present invention. The bead part 100 is provided with an embossed protrusion 101 on the inner surface of the bead part 100 in contact with the valve body 30 in order to enhance the sealing property when the press-fit fixed to the valve body 30.

또한, 비드부(100)에는 비드부(100)에서 리어셀(12)측으로 연장 형성된 돌출부(103)가 마련된다.In addition, the bead part 100 is provided with a protrusion 103 extending from the bead part 100 to the rear cell 12 side.

그리고 밸브본체(30)에는 다단으로 단차진 원통형상으로 마련되며, 밸브본체(30)의 전방 외주에는 프론트다이아프램(16)과 프론트파워피스톤(17) 및 센터플레이트(13)의 중심부가 끼워져 결합되고, 단차진 후방 외주에는 리어다이아프램(18) 및 리어파워피스톤(19)의 중심부가 밸브본체(30)에 강제 압입되어 결합된다.And the valve body 30 is provided in a multi-stage stepped cylindrical shape, the center portion of the front diaphragm 16, the front power piston 17 and the center plate 13 is coupled to the front outer periphery of the valve body 30 The center of the rear diaphragm 18 and the rear power piston 19 are forcibly pressed into the valve body 30 and coupled to the stepped rear outer circumference.

이러한 압입결합을 위하여 리어다이아프램(18)의 비드부(100)와 대응되는 밸브본체(30)의 외주에는 비드부(100)가 삽입되는 압입홈(200)이 마련된다.For the press fitting, a press-fit groove 200 into which the bead part 100 is inserted is provided at the outer circumference of the valve body 30 corresponding to the bead part 100 of the rear diaphragm 18.

또한, 밸브본체(30)의 압입홈(200)의 후방에는 리어다이아프램(18)의 돌출부(103)와 대응하며 밸브본체(30)의 외주면에서 외향으로 돌출된 걸림턱(201)이 마련된다.In addition, at the rear of the press-fit groove 200 of the valve body 30, a locking jaw 201 corresponding to the protrusion 103 of the rear diaphragm 18 and protruding outward from the outer circumferential surface of the valve body 30 is provided. .

따라서, 리어다이아프램(18)이 밸브본체(30)에 강제 압입되어 조립되는 경우에 리어다이아프램(18)의 비드부(100)는 밸브본체(30)의 압입홈(200)에 억지끼움되며, 리어다이아프램(18)의 돌출부(103)는 밸브본체(30)의 걸림턱(201)에 의하여 변형되어 걸림턱(201)의 외면을 감싸도록 압착되게 고정된다.Therefore, when the rear diaphragm 18 is forcibly pressed into the valve body 30 and assembled, the bead part 100 of the rear diaphragm 18 is pressed into the press-in groove 200 of the valve body 30. The protrusion 103 of the rear diaphragm 18 is deformed by the locking jaw 201 of the valve body 30 and is fixed to be compressed to cover the outer surface of the locking jaw 201.

또한, 비드부(100)가 압입홈(200)에 압입고정되는 경우에 비드부(100)의 내측에 형성된 엠보 형상의 돌기부(101)에 의하여 실링성이 더욱더 강화된다.In addition, when the bead part 100 is press-fitted into the press-fit groove 200, the sealing property is further enhanced by the embossed protrusion 101 formed inside the bead part 100.

또한, 밸브본체(30)에는 프론트정압실(14a)과 리어정압실(15a)을 연통하는 정압통로(32)와 프론트변압실(14b)과 리어변압실(15b)을 연통하는 변압통로(33)가 형성되며, 밸브본체(30)의 중앙에는 입력축(50)이 위치하며 외기 유입로가 되는 공기흡입부(31)와, 플런저(35,36)가 삽입되는 실린더(34)가 형성된다. 실린더(34)에는 입력축(50)의 단부와 연계되어 축방향으로 미끄럼운동하는 제1플런저(35)가 설치되며, 밸브본체(30) 내부에는 입력축(50)의 작동에 의해 공기의 유입을 실질적으로 제어하는 탄성재질의 포펫밸브(45)가 설치된다.In addition, the valve main body 30 has a constant pressure passage 32 communicating with the front constant pressure chamber 14a and the rear constant pressure chamber 15a, and a transformer passage 33 communicating with the front transformer chamber 14b and the rear transformer chamber 15b. In the center of the valve body 30, the input shaft 50 is located, and the air intake portion 31, which serves as the inlet air, and the cylinder 34 into which the plungers 35 and 36 are inserted are formed. The cylinder 34 is provided with a first plunger 35 sliding in the axial direction in association with the end of the input shaft 50, and the inside of the valve body 30 allows the inflow of air by the operation of the input shaft 50. Poppet valve 45 of the elastic material to be controlled by is installed.

또한, 포펫밸브(45)와 조합하여 진공밸브기능을 수행하도록 밸브본체(30) 내주에는 제1밸브시트부(46)가 마련되어 있어서, 포펫밸브(45) 선단이 제1밸브시트부(46)에 안착되면 정압통로(32)는 폐쇄되게 된다. 그리고 포펫밸브(45)와 조합하여 에어밸브 기능을 수행하도록 제1플런저(35)의 후단부에는 제2밸브시트부(38)가 마련되어 있어서, 포펫밸브(45) 선단이 제2밸브시트부(38)에 안착되면 외기가 변압실(14b,15b)로 유입되는 것을 차단하게 된다.In addition, the first valve seat portion 46 is provided at the inner circumference of the valve body 30 so as to perform a vacuum valve function in combination with the poppet valve 45, so that the tip of the poppet valve 45 has the first valve seat portion 46. When seated in the static pressure passage 32 is closed. In addition, a second valve seat portion 38 is provided at the rear end of the first plunger 35 so as to perform an air valve function in combination with the poppet valve 45, so that the tip of the poppet valve 45 has a second valve seat portion ( When it is seated in 38, it blocks the outside air from flowing into the transformer chambers 14b and 15b.

이러한 제1플런저(35)의 선단은 단차지게 마련되어 제2플런저(36) 측으로 돌 출되어 소정의 공간을 가지며 제2플런저(36)와 결합된다. 이러한 제2플런저(36)의 선단은 리액션디스크(40)와 접하게 마련되어 있으며, 이러한 리액션디스크(40)의 타측은 출력축(70)의 요입홈에 끼워져서 결합된다.The front end of the first plunger 35 is stepped and protrudes toward the second plunger 36 to have a predetermined space and is coupled to the second plunger 36. The tip of the second plunger 36 is provided in contact with the reaction disk 40, the other side of the reaction disk 40 is fitted into the recessed groove of the output shaft 70 is coupled.

다음에는 이와 같이 구성된 차량용 브레이크 부스터의 리어다이아프램을 밸브본체에 조립하는 과정을 설명한다.Next, a process of assembling the rear diaphragm of the vehicle brake booster configured as described above to the valve body will be described.

작업자가 부스터를 조립하기 위해서 리어다이아프램(18)과 리어파워피스톤(19)을 밸브본체(30)에 결합시키는 경우, 리어다이아프램(18)의 단부에 마련된 비드부(100)와 돌출부(103)를 밸브본체(30)의 압입홈(200)과 걸림턱(201)과 상응하도록 배치한 후 강제 압입하면 비드부(100)와 돌출부(103)는 일정량 변형이 되면서 각각 압입홈(200)과 걸림턱(201)에 눌리게 된다. 이 경우, 비드부(100)는 압입홈(200) 내에서 변형이 제한되며 돌출부(103)는 밸브본체(30)의 걸림턱(201)을 감싸는 형태로 변형되어 견고하게 압입 고정되게 된다. 이 경우, 비드부(100)의 내측에 마련된 돌기부(101)에 의하여 압입홈(200)과 접하게 되는 비드부(100)의 접촉면 또한 실링성이 향상되게 된다.When the operator couples the rear diaphragm 18 and the rear power piston 19 to the valve body 30 to assemble the booster, the bead part 100 and the protrusion 103 provided at the end of the rear diaphragm 18 are provided. ) Is arranged to correspond to the press-fit groove 200 and the locking step 201 of the valve body 30 and forced press-fit the bead portion 100 and the protrusion 103 is a certain amount of deformation while pressing the push-in groove 200 and The locking jaw 201 is pressed. In this case, the bead part 100 is limited in deformation in the indentation groove 200 and the protrusion 103 is deformed in the form of surrounding the locking step 201 of the valve body 30 is firmly press-fit fixed. In this case, the sealing surface of the bead part 100 which is in contact with the press-fit groove 200 by the protrusion 101 provided inside the bead part 100 is also improved.

따라서, 리어다이아프램(18)을 밸브본체(30)에 결합시키기 위한 별도의 고정부재는 필요하지 않게 된다.Therefore, a separate fixing member for coupling the rear diaphragm 18 to the valve body 30 is not necessary.

또한, 리어다이아프램(18)이 밸브본체(30)에 고정된 상태에서 센터플레이트(13)를 밸브본체(30)에 고정시킨 후 프론트셀(11)을 센터플레이트(13)에 결합함으로써 케이싱(10)을 밸브본체(30)에 결합시키는 작업이 보다 용이하게 된다.In addition, after the rear diaphragm 18 is fixed to the valve body 30, the center plate 13 is fixed to the valve body 30, and then the front cell 11 is coupled to the center plate 13 so that the casing ( The operation of coupling 10) to the valve body 30 becomes easier.

도 1은 종래의 차량용 브레이크 부스터를 개략적으로 나타낸 단면도이다.1 is a cross-sectional view schematically showing a conventional brake booster for a vehicle.

도 2는 도 1의 'A'부분의 확대도이다.FIG. 2 is an enlarged view of portion 'A' of FIG. 1.

도 3은 본 발명에 따른 차량용 브레이크 부스터를 개략적으로 나타낸 단면도이다.3 is a schematic cross-sectional view of a vehicle brake booster according to the present invention.

도 4는 도 3의 'B'부분의 확대도이다.4 is an enlarged view of a portion 'B' of FIG. 3.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

10: 케이싱 11: 프론트셀10: casing 11: front cell

12: 리어셀 13: 센터플레이트12: rear cell 13: center plate

16: 프론트다이아프램 17: 프론트파워피스톤16: Front diaphragm 17: Front power piston

18: 리어아이아프램 19: 리어파워피스톤18: Rear Eye Afram 19: Rear Power Piston

30: 밸브본체 37: 안착부30: valve body 37: seating portion

40: 리액션디스크 45: 포펫밸브40: reaction disk 45: poppet valve

50: 입력축 70: 출력축50: input shaft 70: output shaft

100: 비드부 101: 돌기부100: bead part 101: protrusion part

103: 돌출부 200: 압입홈103: protrusion 200: indentation groove

201: 걸림턱 201: jamming jaw

Claims (4)

프론트셀과 리어셀이 밀페결합된 케이싱과, 상기 케이싱을 프론트실과 리어실로 구획하는 센터플레이트와, 상기 리어실을 리어정압실과 리어변압실로 구획하는 리어다이아프램과, 상기 센터플레이트의 중심부를 일단부가 미끄럼가능하게 관통하며 타단은 상기 리어셀 외부로 돌출되어 공기의 유입을 제어하는 밸브본체를 포함한 차량용 브레이크 부스터에 있어서,A casing in which the front cell and the rear cell are hermetically coupled, a center plate for partitioning the casing into a front chamber and a rear chamber, a rear diaphragm for partitioning the rear chamber into a rear positive pressure chamber and a rear transformer chamber, and a central portion of the center plate. In the brake booster for a vehicle including a valve body for sliding through and the other end protrudes outside the rear cell to control the inflow of air, 상기 리어다이아프램의 중앙부는 상기 밸브본체에 강제 압입되어 고정되는 것을 특징으로 하는 차량용 브레이크 부스터.The center portion of the rear diaphragm is a brake booster for a vehicle, characterized in that being forced to be fixed to the valve body. 제 1항에 있어서,The method of claim 1, 상기 리어다이아프램의 중앙부에는 상기 밸브본체에 압입되는 비드부와 상기 비드부로부터 상기 리어셀측으로 연장 형성된 돌출부를 포함하고, 상기 비드부와 대응되는 상기 밸브본체의 외주에는 상기 비드부가 삽입되는 압입홈과 상기 돌출부와 대응하며 상기 밸브본체 외주면에서 외향으로 돌출된 걸림턱을 포함한 것을 특징으로 하는 차량용 브레이크 부스터.The center portion of the rear diaphragm includes a bead portion pressed into the valve body and a protrusion extending from the bead portion to the rear cell side, and an indentation groove into which the bead portion is inserted in the outer circumference of the valve body corresponding to the bead portion. And a locking jaw corresponding to the protrusion and protruding outwardly from the outer peripheral surface of the valve body. 제 2항에 있어서,The method of claim 2, 상기 압입홈과 접하는 상기 비드부에는 압입고정시 상기 비드부가 상기 압입홈에 밀착되도록 엠보형상의 돌기부가 마련된 것을 특징으로 하는 차량용 브레이크 부스터.The bead portion in contact with the indentation groove is a brake booster for a vehicle, characterized in that the embossed projection is provided so that the bead portion is in close contact with the indentation groove when the indentation is fixed. 제 2항에 있어서,The method of claim 2, 상기 리어다이아프램의 중앙부가 상기 밸브본체에 압입 고정되는 경우 상기 비드부는 상기 압입홈에 삽입 고정되며, 상기 돌출부는 상기 걸림턱의 외면을 감싸도록 압착 고정되는 것을 특징으로 하는 차량용 브레이크 부스터.When the center portion of the rear diaphragm is press-fitted and fixed to the valve body, the bead portion is inserted and fixed to the press-in groove, the projection portion is a vehicle brake booster, characterized in that the press-fit fixed to surround the outer surface of the locking jaw.
KR1020080025378A 2008-03-19 2008-03-19 A booster of brake for vehicle KR20090100023A (en)

Priority Applications (1)

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KR1020080025378A KR20090100023A (en) 2008-03-19 2008-03-19 A booster of brake for vehicle

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KR1020080025378A KR20090100023A (en) 2008-03-19 2008-03-19 A booster of brake for vehicle

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KR20090100023A true KR20090100023A (en) 2009-09-23

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