KR200363585Y1 - Air pressure type brake unit for a railroad cars - Google Patents

Air pressure type brake unit for a railroad cars Download PDF

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Publication number
KR200363585Y1
KR200363585Y1 KR20-2004-0018804U KR20040018804U KR200363585Y1 KR 200363585 Y1 KR200363585 Y1 KR 200363585Y1 KR 20040018804 U KR20040018804 U KR 20040018804U KR 200363585 Y1 KR200363585 Y1 KR 200363585Y1
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KR
South Korea
Prior art keywords
piston
wedge
brake unit
yoke
screw shaft
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KR20-2004-0018804U
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Korean (ko)
Inventor
이억수
Original Assignee
우리이엔지 주식회사
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Priority to KR20-2004-0018804U priority Critical patent/KR200363585Y1/en
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Publication of KR200363585Y1 publication Critical patent/KR200363585Y1/en

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Classifications

    • 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
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
    • 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
    • B60T13/26—Compressed-air systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H1/00—Applications or arrangements of brakes with a braking member or members co-operating with the periphery of the wheel rim, a drum, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H13/00—Actuating rail vehicle brakes
    • B61H13/20—Transmitting mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H13/00—Actuating rail vehicle brakes
    • B61H13/34—Details
    • B61H13/38—Suspension of transmitting mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/30—Railway vehicles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Braking Arrangements (AREA)

Abstract

본 고안은 철도차량용 공기압 브레이크유니트에 관한 것이다.The present invention relates to a pneumatic brake unit for rolling stock.

본 고안의 목적 및 효과는 소정의 공기압을 이용하여 작동되는 피스톤의 쐐기각을 작게하여 제동력을 증대시킴은 물론 피스톤의 쐐기다리에 접촉되는 요크베어링의 접촉구조를 개선하여 제동효율이 증대되는 효과를 갖는다.The purpose and effect of the present invention is to increase the braking force by reducing the wedge angle of the piston operated by using a predetermined air pressure as well as to improve the contact structure of the yoke bearing contacting the wedge leg of the piston to increase the braking efficiency. Have

이러한 본 고안은 에어입구를 통해 실린더블록으로 유입된 소정의 공압에 의해 작동되는 피스톤과, 피스톤에 일체로 형성된 한 쌍의 쐐기다리에 의해 전방으로 이동되게 접촉되는 요크의 요크베어링과, 요크베어링의 전방이동에 의해 함께 전방으로 이동되는 나사축과, 나사축의 전방에 결합되는 슈홀더 및 브레이크슈로 구성되는 철도차량용 공기압 브레이크유니트에 있어서,The present invention is a piston operated by a predetermined pneumatic flow into the cylinder block through the air inlet, the yoke bearing of the yoke contacted to be moved forward by a pair of wedge legs integrally formed on the piston, and the yoke bearing In a pneumatic brake unit for a railway vehicle, comprising a screw shaft moved forward together by forward movement, and a shoe holder and a brake shoe coupled to the front of the screw shaft,

피스톤의 쐐기다리는 쐐기각이 11.52°로 형성되고,The wedge leg of the piston has a wedge angle of 11.52 °,

요크베어링의 표면이 볼록하게 형성된 것을 특징으로 하는 철도차량용 공기압 브레이크유니트에 의하여 달성된다.It is achieved by a pneumatic brake unit for a railway vehicle, characterized in that the surface of the yoke bearing is convex.

Description

철도차량용 공기압 브레이크유니트{AIR PRESSURE TYPE BRAKE UNIT FOR A RAILROAD CARS}Pneumatic brake unit for rolling stock {AIR PRESSURE TYPE BRAKE UNIT FOR A RAILROAD CARS}

본 고안은 공기압으로 작동되는 철도차량용 브레이크 유니트에 관한 것으로서, 더욱 상세히 설명하면 종래의 브레이크 유니트에 적용되는 공기압을 이용하여 브레이크의 제동력을 보다 크게 발생시킬 수 있고, 요크베어링의 선접촉구조를 점접촉구조로 변경하여 작동마찰면적을 감소시킴으로써 제동효율을 증대시킨 철도용 공기압 브레이크유니트의 구조에 관한 것이다.The present invention relates to a brake unit for a railway vehicle operated by pneumatic pressure, and when described in more detail, it is possible to generate a greater braking force of the brake by using the pneumatic pressure applied to the conventional brake unit, and the point contact of the yoke bearing line contact structure The present invention relates to a structure of a pneumatic brake unit for railroads, in which a braking efficiency is increased by changing the structure to reduce an operating friction area.

종래의 브레이크 유니트는 피스톤의 일측 하부로 돌출 연장된 한 쌍의 쐐기다리를 갖는 피스톤과, 이 피스톤의 하방이동에 의해 전방으로 이동하며 피스톤의 이동방향과 직각으로 배치된 나사축(또는 푸시로드)과, 피스톤 및 나사축을 수용하는 실린더블록과, 피스톤 상부를 커버하며 공기압을 유입시키는 에어입구를 갖는 실린더 커버와, 실린더블록 일측 외부로 전방부가 돌출되어 있는 나사축의 전단부에 연결되며 브레이크패드(도시되지 않음)를 유지시키는 브레이크 슈 홀더로 구성된다. 나사축에는 피스톤의 쐐기다리와 접촉되는 요크베어링을 지지하도록 요크가 설치된다. 이 요크의 상방 중앙에는 피스톤의 복귀를 돕도록 피스톤 스프링이 설치되고, 나사축에는 나사축의 복귀를 돕는 푸시스프링이 설치된다. 이외에, 브레이크 유니트에는 기타 요소(element)가 더욱 설치되나 이의 상세한 구조는 생략한다.Conventional brake units include a piston having a pair of wedge legs protruding downward from one side of the piston, and a screw shaft (or push rod) disposed forwardly by a downward movement of the piston and disposed perpendicular to the direction of movement of the piston. And a cylinder block for accommodating the piston and the screw shaft, a cylinder cover having an upper portion of the piston inlet for introducing air pressure, and a front end of the screw shaft protruding outward from one side of the cylinder block. The brake shoe holder). The screw shaft is provided with a yoke to support the yoke bearing in contact with the wedge leg of the piston. A piston spring is provided in the upper center of the yoke to assist the return of the piston, and a push spring is provided in the screw shaft to assist the return of the screw shaft. In addition, other elements are further installed in the brake unit, but a detailed structure thereof is omitted.

이와 같이 구성된 종래의 브레이크 유니트는 먼저, 소정 압력의 공기압이 브레이크 유니트의 실린더커버에 설치된 에어 입구를 통해서 유입되면 실린더 블록내의 피스톤이 하방으로 이동되고, 이 피스톤의 하방으로 일체로 형성된 한 쌍의 쐐기 다리가 요크베어링과 접촉하여 나사축을 전방으로 이동시키고, 이 나사축의 전방에 설치된 브레이크 슈 홀더에 장착되는 브레이크패드(도시되지 않음)가 철도차량의 바퀴(도시되지 않음)에 마찰접촉되어 철도차량의 제동이 이루어지게 되는 것이다.In the conventional brake unit configured as described above, first, when air pressure of a predetermined pressure flows through the air inlet installed in the cylinder cover of the brake unit, the piston in the cylinder block is moved downward, and a pair of wedges integrally formed under the piston The legs come in contact with the yoke bearings to move the screw shaft forward, and the brake pads (not shown) mounted on the brake shoe holders provided in front of the screw shafts are frictionally contacted with the wheels (not shown) of the railway car to Braking is achieved.

이와같이 구성되어 작동되는 철도용 공기압 브레이크는 스웨덴의 싸브 와브코(SAB WABCO)사로부터 수입하여 철도차량에 장착하여 사용되고 있다.The pneumatic brakes for railways constructed and operated in this way are imported from Sweden's SAB WABCO and used in railway vehicles.

그러나, 현재 국내의 철도차량에 장착되어 사용되는 종래의 공기압 브레이크는 철도차량의 바퀴 제동시에 충분한 제동력(3,600㎏f 이상의 힘)을 발생하지 못하므로 밀림현상이 발생되고, 이와 같은 밀림현상으로 인해서 철도의 소정 제동거리가 길어지게되므로 소정의 정지 거리(정지선)에서 정확히 멈추지 못하는 원인이 되고 있다.However, the conventional pneumatic brakes currently installed and used in domestic railway vehicles do not generate sufficient braking force (3,600 kgf or more) when the wheels of the railway vehicle are braked, resulting in a jungle phenomenon. Since the predetermined braking distance becomes longer, it causes a failure to stop accurately at the predetermined stopping distance (stop line).

또한, 종래의 지하철도 브레이크 유니트에서 사용되는 피스톤의 힘을 증대시키기 위해서 쐐기다리의 쐐기각도를 줄이는 경우 쐐기 다리의 내구성이 감소되어 쐐기다리가 파손되는 경우도 발생된다.In addition, in the case of reducing the wedge angle of the wedge legs in order to increase the force of the piston used in the brake unit in the conventional subway, the durability of the wedge legs is also reduced and the wedge legs are broken.

따라서, 현재 소정 크기의 제동력(3,600㎏f 이상의 힘)을 발생할 수 있는 브레이크 유니트의 필요성이 제기되고 있는 실정이다.Accordingly, there is a need for a brake unit that can generate a braking force of a predetermined size (force of 3,600 kgf or more).

또한, 피스톤의 쐐기 다리와 요크베어링의 접촉이 선접촉(line contact)으로 이루어져 있어서 제동효율이 저하되는 문제점이 있었다.In addition, since the contact between the wedge leg of the piston and the yoke bearing is made of a line contact, there is a problem that the braking efficiency is lowered.

본 고안의 목적은 소정 크기의 제동력(3,600㎏f 이상의 힘)을 발생시킬 수 있는 브레이크 유니트를 제공하고자 하는 것이다.An object of the present invention is to provide a brake unit capable of generating a braking force of a predetermined size (force of 3,600 kgf or more).

본 고안의 다른 목적은 브레이크 유니트의 작동시에 부품상호간에 발생되는 마찰력을 감소시키기 위해 선접촉(line contact)을 점접촉(point contact)되게 하여 마찰력을 더욱 최소화한 브레이크 유니트를 제공하고자 하는 것이다.Another object of the present invention is to provide a brake unit which minimizes the frictional force by making point contact of the line contact to reduce the frictional force generated between the components during operation of the brake unit.

본 고안의 이와 같은 목적은 피스톤의 하부로 연장되는 쐐기다리의 쐐기 각도(wedge angle)를 더욱 최소화시키고, 이의 파손을 방지하기 위해 쐐기다리를 더욱보강하며, 요크베어링의 중앙부를 좌우측변부보다 높게 형성하여 제동효율이 향상되게 함으로써 달성된다.This object of the present invention further minimizes the wedge angle of the wedge legs extending to the lower part of the piston, further strengthens the wedge legs to prevent their breakage, and forms the central portion of the yoke bearing higher than the left and right edges. By the braking efficiency is improved.

도1은 본 고안의 브레이크 유니트의 개략 단면도.1 is a schematic cross-sectional view of a brake unit of the present invention.

도2는 본 고안의 요부인 피스톤과 나사축과 결합된 요크베어링을 보여주는 예시도.Figure 2 is an exemplary view showing a yoke bearing coupled to the piston and the screw shaft which is the main part of the present invention.

도3은 본 고안의 요크베어링이 결합된 요크의 정면도.Figure 3 is a front view of the yoke coupled to the yoke bearing of the present invention.

도4a 및 도4b는 도3의 A-A선 단면도.4A and 4B are cross-sectional views taken along the line A-A of FIG.

도5는 종래의 요크베어링의 단면도.5 is a cross-sectional view of a conventional yoke bearing.

** 도면의 주요부분에 대한 부호의 설명 **** Explanation of symbols for main parts of drawings **

1: 피스톤 1a: 쐐기다리1: piston 1a: wedge leg

2: 실린더 3: 요크2: cylinder 3: yoke

3a: 요크베어링 4: 나사축3a: yoke bearing 4: screw shaft

5: 슈홀더 6: 푸시스프링5: Shoe holder 6: Push spring

7: 피스톤스프링 8: 실린더 커버7: piston spring 8: cylinder cover

9: 에어입구9: air inlet

본 고안의 브레이크 유니트는 피스톤의 쐐기 각도와 요크베어링의 구조를 개선함으로써 제동력의 향상은 물론 제동효율이 증대되는 효과를 갖는 것이 특징이다.The brake unit of the present invention is characterized by having an effect of improving the braking force and of the braking efficiency by improving the wedge angle of the piston and the structure of the yoke bearing.

이하, 첨부도면을 참조하여 본 고안의 브레이크 유니트의 구성을 더욱 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in more detail the configuration of the brake unit of the present invention.

도1 및 도2에 예시된 바와 같이, 본 고안의 피스톤 쐐기다리의 쐐기 각도(a)는 더욱 작아져서 철도차량의 바퀴에 소정 크기 이상의 제동력을 발생할 수 있다.As illustrated in Figs. 1 and 2, the wedge angle a of the piston wedge leg of the present invention becomes smaller so that braking force of a predetermined magnitude or more may be generated on the wheels of the railway vehicle.

예컨대, 철도차량을 멈추기 위한 브레이크 유니트의 실린더 커버(cylinder cover)(8)상의 에어입구(9)로 공급되는 에어압력이 3.8㎏/㎠이고, 내경이 178㎜인 실린더(2)로 유입되면 248.7㎠의 실린더 단면적에 압력이 가해져서 피스톤(1)이 하방(도면상 하방)으로 전진한다.For example, when the air pressure supplied to the air inlet 9 on the cylinder cover 8 of the brake unit for stopping the railway vehicle is 3.8 kg / cm 2, and flows into the cylinder 2 having an inner diameter of 178 mm, it is 248.7. Pressure is applied to the cylinder cross-sectional area of 2 cm 2 and the piston 1 moves downward (downward in the drawing).

이때, 피스톤(1)의 전진하는 힘(F)은 단면적×압력=248.7㎠ × 3.8㎏/㎠ =945㎏이고, 피스톤 쐐기다리(1a)의 쐐기각도가 11.52°일 때 나사축(screw shaft)의 배력은 F ÷ {sin 11.52° + (μ× cos 11.52°)}으로 계산된다. 여기에서 μ은 마찰계수로서 윤활제가 그리스(grease)일 때 마찰계수는 0.05이다. 이를 계산하면 브레이크 힘(제동력)은 3,800㎏f 이 발생된다.At this time, the forward force F of the piston 1 is cross-sectional area × pressure = 248.7 cm 2 × 3.8 kg / cm 2 = 945 kg, and the screw shaft when the wedge angle of the piston wedge 1a is 11.52 °. The back power of is calculated as F ÷ {sin 11.52 ° + (μ x cos 11.52 °)}. Where μ is the coefficient of friction and the coefficient of friction is 0.05 when the lubricant is grease. Calculating this, 3,800 kgf of brake force (braking force) is generated.

한편, 쐐기다리(1a)의 쐐기각도 표면은 요크베어링(3a)과의 마찰시 마모를 방지하기 위해서 열처리 로크웰경도가 HRC 40~60 이 되는 것이 바람직하다.On the other hand, the wedge angle surface of the wedge leg (1a) is preferably a heat treatment Rockwell hardness of HRC 40 ~ 60 in order to prevent abrasion during friction with the yoke bearing (3a).

도2에 피스톤(1)과 나사축(4)에 결합된 요크의 요크베어링의 접촉관계를 개략적으로 도시한 바와 같이, 피스톤 쐐기다리(1a)는 작은 쐐기각도(a)로 형성되고, 피스톤이 하방으로 이동함에 따라서 쐐기다리(1a)의 접촉면(10)이 요크베어링(4a)에 접촉되어 요크와 나사축(4)이 전방(도면상에서 좌측방향)으로 이동된다.As schematically showing the contact relationship between the piston 1 and the yoke bearing of the yoke coupled to the screw shaft 4 in Fig. 2, the piston wedge 1a is formed with a small wedge angle a, and the piston As it moves downward, the contact surface 10 of the wedge leg 1a contacts the yoke bearing 4a, and the yoke and the screw shaft 4 move to the front (left side in the figure).

도3에 요크(3)가 평면도로 개략적으로 도시된 바와 같이, 요크의 중앙부에는 나사축(4)이 결합되고, 이의 좌우측에는 요크베어링(3a)이 결합된다. 미설명부호 11은 요크의 직선운동을 안내하는 가이드블록이다.As the yoke 3 is schematically shown in plan view in Fig. 3, the screw shaft 4 is coupled to the center of the yoke, and the yoke bearing 3a is coupled to the left and right sides thereof. Reference numeral 11 is a guide block for guiding the linear motion of the yoke.

도4a에 단면도로 그리고 도4b에 측면도로 예시된 바와 같이, 요크베어링(3a)의 중앙부분은 쐐기다리의 접촉면(10)과 점접촉되도록 좌우측 표면보다 볼록하게 볼록부(3b)가 형성된다. 따라서, 쐐기다리(1a)가 요크베어링(3a)에 접촉될 때 요크베어링에 선접촉(line contact)되는 대신에 점접촉(point contact)이 이루어지게 된다.As illustrated in cross section in FIG. 4A and in side view in FIG. 4B, the convex portion 3b is formed more convexly than the left and right surfaces so that the center portion of the yoke bearing 3a is in point contact with the contact surface 10 of the wedge leg. Thus, when the wedge leg 1a comes into contact with the yoke bearing 3a, point contact is made instead of line contact with the yoke bearing.

이와달리, 종래의 요크베어링(3a')은 도5에 단면도로 예시된 바와 같이, 쐐기다리와의 (접촉)표면이 직선으로 이루어져 있다. 따라서 쐐기다리의 접촉면(10)(도2참조)과 요크베어링(3a') 접촉은 선접촉을 이룬다.In contrast, the conventional yoke bearing 3a 'has a straight line (contact) surface with the wedge legs, as illustrated in the sectional view in FIG. Therefore, the contact surface 10 (see FIG. 2) of the wedge leg and the yoke bearing 3a 'contact make a line contact.

도1에 본 고안의 브레이크 유니트가 예시되어 있으며, 여기에서 에어입구(9)를 통해서 소정의 공기압력이 실린더블록(2)내로 유입되면 피스톤(1)이 하방으로 이동되어 피스톤 스프링(7)이 압축되고, 이와 동시에 요크베어링(3a)이 쐐기다리(1a)에 의해서 전방으로 이동함에 따라서 나사축(4)이 전방으로 이동(도면상에서 좌측으로 이동)되며, 나사축 전방에 결합된 (브레이크) 슈홀더(5)가 철도차량의 바퀴에 접촉되어 철도차량의 제동이 이루어진다.The brake unit of the present invention is illustrated in FIG. 1, wherein when a predetermined air pressure flows into the cylinder block 2 through the air inlet 9, the piston 1 is moved downwards so that the piston spring 7 is moved. At the same time, as the yoke bearing 3a is moved forward by the wedge leg 1a, the screw shaft 4 is moved forward (moved to the left in the drawing), and coupled to the front of the screw shaft (brake). The shoe holder 5 is in contact with the wheels of the railway vehicle to brake the railway vehicle.

나사축(4)이 전방으로 이동될 때 나사축(4)에 설치되는 푸시스프링(push spring)(6)도 압축된다.When the screw shaft 4 is moved forward, the push spring 6 installed on the screw shaft 4 is also compressed.

피스톤(1)의 하방이동에 의해 나사축(4)이 전방으로 이동됨으로써 철도차량의 제동이 이루어져서 철도차량이 정지된 후 작동된 브레이크 힘(제동력)을 해제시키기 위해서는 먼저, 에어입구(9)를 통하여 실린더블록(2)으로 유입된 에어가 에어공급원(도시되지 않음)으로 복귀되어 피스톤(1)에 작용되는 압력이 해제되면 피스톤(1)은 피스톤스프링(7)에 의해 상방으로 복원되는 한편 나사축(4)도 푸시스프링(6)에 의해 후방으로 이동되어 복원된다.When the screw shaft 4 is moved forward by the downward movement of the piston 1, the rail vehicle is braked to release the brake force (braking force) operated after the railroad vehicle is stopped. When the air flowing into the cylinder block 2 is returned to the air supply source (not shown) and the pressure applied to the piston 1 is released, the piston 1 is restored upward by the piston spring 7 while the screw The shaft 4 is also moved rearward by the push spring 6 and restored.

본 고안의 브레이크 유니트에 사용되는 피스톤은 소정 크기 이상의 제동력을 발생하기 위해서 쐐기다리의 쐐기 각도를 더욱 작게함과 아울러 쐐기다리의 파손을 방지하기 위해서 보강리브를 더욱 두껍게 형성하였고, 쐐기다리와 접촉되는 요크베어링의 접촉부분을 선접촉에서 점접촉되게 구성하여 제동효율이 향상되는 효과를갖는 유용한 고안이다.The piston used in the brake unit of the present invention has a smaller wedge angle of the wedge legs in order to generate a braking force of a predetermined size and a thicker reinforcement rib to prevent breakage of the wedge legs, and is in contact with the wedge legs. It is a useful design having the effect of improving the braking efficiency by constructing the contact portion of the yoke bearing in point contact at the line contact.

Claims (2)

에어입구를 통해 실린더블록으로 유입된 소정의 공압에 의해 작동되는 피스톤과, 피스톤에 일체로 형성된 한 쌍의 쐐기다리에 의해 전방으로 이동되게 접촉되는 요크의 요크베어링과, 요크베어링의 전방이동에 의해 함께 전방으로 이동되는 나사축과, 나사축의 전방에 결합되는 슈홀더 및 브레이크슈로 구성되는 철도차량용 공기압 브레이크유니트에 있어서,The piston is operated by a predetermined pneumatic pressure introduced into the cylinder block through the air inlet, the yoke bearing of the yoke contacted to be moved forward by a pair of wedge legs integrally formed on the piston, and the forward movement of the yoke bearing In the pneumatic brake unit for railroad vehicles comprising a screw shaft moved forward together, and a shoe holder and a brake shoe coupled to the front of the screw shaft, 피스톤의 쐐기다리는 쐐기각이 11.52°로 형성되고,The wedge leg of the piston has a wedge angle of 11.52 °, 요크베어링의 표면이 볼록하게 형성된 것을 특징으로 하는 철도차량용 공기압 브레이크유니트Pneumatic brake unit for railway vehicles, characterized in that the surface of the yoke bearing is convex 제1항에 있어서, 쐐기다리(1a)는 열처리 로크웰경도가 HRC 40~60 인 쐐기각도표면을 갖는 것을 특징으로 하는 철도차량용 공기압 브레이크유니트.2. The pneumatic brake unit according to claim 1, wherein the wedge leg (1a) has a wedge angle surface having a heat treatment Rockwell hardness of HRC 40 to 60.
KR20-2004-0018804U 2004-07-02 2004-07-02 Air pressure type brake unit for a railroad cars KR200363585Y1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113757275A (en) * 2020-06-02 2021-12-07 常州中车铁马科技实业有限公司 Brake wedge piston and design method thereof, common brake cylinder, parking brake cylinder and three-point and four-point hanging clamp unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113757275A (en) * 2020-06-02 2021-12-07 常州中车铁马科技实业有限公司 Brake wedge piston and design method thereof, common brake cylinder, parking brake cylinder and three-point and four-point hanging clamp unit

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