KR200264244Y1 - Brake system of hydraulic machinery - Google Patents
Brake system of hydraulic machinery Download PDFInfo
- Publication number
- KR200264244Y1 KR200264244Y1 KR2019970044091U KR19970044091U KR200264244Y1 KR 200264244 Y1 KR200264244 Y1 KR 200264244Y1 KR 2019970044091 U KR2019970044091 U KR 2019970044091U KR 19970044091 U KR19970044091 U KR 19970044091U KR 200264244 Y1 KR200264244 Y1 KR 200264244Y1
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- KR
- South Korea
- Prior art keywords
- hydraulic
- brake cylinder
- piston chamber
- pressure
- traveling motor
- Prior art date
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Classifications
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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
- B60T13/74—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 electrical assistance or drive
- B60T13/745—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 electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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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
- B60T13/12—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 liquid
- B60T13/16—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 liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
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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
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/40—Special vehicles
- B60Y2200/41—Construction vehicles, e.g. graders, excavators
Abstract
굴삭기와 같은 건설차량에 장착되는 주행모터(TRACK MOTOR)를 제동시키는 브레이크실린더에 작업장치를 구동시키는 고압의 작동유 유입됨을 차단하여 관련부품을 보호할 수 있도록 한 것이다.It is to protect the related parts by blocking the inflow of high-pressure hydraulic fluid driving the work device to the brake cylinder for braking the TRACK MOTOR mounted on construction vehicles such as excavators.
바람직한 실시예에 의하면, 유압펌프와, 상기 유압펌프에 연결되어 작동유 공급에 따라 좌측 또는 우측방향으로 회전하는 주행모터와, 상기 유압펌프와 주행모터사이에 설치되어 상기 주행모터 및 작업장치에 공급되는 작동유의 흐름방향을 제어하는 평행밸브와, 상기 평행밸브와 주행모터사이에 설치되어 상기 유압펌프로부터 작동유 공급으로 인해 상기 주행모터를 제동하는 브레이크실린더를 구비하는 액압기계의 제동장치에 있어서, 상기 평행밸브와 상기 브레이크실린더사이의 유로에 설치되며, 상기 브레이크실린더의 피스톤실에 소정의 설정압이상의 고압 발생시 구동하여 상기 평행밸브를 경유하는 고압의 작동유가 상기 피스톤실에 유입됨을 차단하는 압력조절밸브를 구비하여 구성됨을 특징으로 하는 액압기계의 제동장치를 제공한다.According to a preferred embodiment, a hydraulic motor, a traveling motor connected to the hydraulic pump and rotated in a left or right direction according to the supply of hydraulic oil, and installed between the hydraulic pump and the traveling motor and supplied to the traveling motor and the work device. 8. A braking device for a hydraulic machine, comprising: a parallel valve for controlling a flow direction of hydraulic oil; and a brake cylinder provided between the parallel valve and a traveling motor to brake the traveling motor by supplying hydraulic oil from the hydraulic pump. A pressure regulating valve installed in a flow path between the valve and the brake cylinder and operating when a high pressure of a predetermined pressure or more is generated in the piston chamber of the brake cylinder to block the flow of high pressure hydraulic fluid through the parallel valve into the piston chamber. Provided is a braking device for a hydraulic machine, characterized in that provided with.
이로인해, 굴삭기와 같은 건설차량에 장착되는 주행모터를 제동시키는 브레이크실린더에 작업장치를 구동시키는 고압의 작동유 유입됨을 차단하여 브레이크실린더의 내구성을 향상시키며, 고가의 시일(SEAL)사용이 불필요하여 원가비용을 줄일 수 있도록 한 이점을 갖는다.This prevents the inflow of high-pressure hydraulic fluid driving the work tool into the brake cylinder for braking the driving motor mounted on construction vehicles such as excavators, improving durability of the brake cylinder, and eliminating the need for expensive seals. One advantage is to reduce costs.
Description
본 고안은 액압기계의 제동장치에 관한 것으로, 더욱 상세하게는 굴삭기와 같은 건설차량에 장착되는 주행모터(TRACK MOTOR)를 제동시키는 브레이크실린더에 작업장치를 구동시키는 고압의 작동유 유입됨을 차단하여 관련부품을 보호할 수 있도록 한 액압기계의 제동장치에 관한 것이다.The present invention relates to a braking device of a hydraulic machine, and more particularly, to block the inflow of high-pressure hydraulic fluid driving the work device to the brake cylinder for braking the travel motor (TRACK MOTOR) mounted on a construction vehicle such as an excavator It relates to a brake of a hydraulic machine to protect the pressure.
도 1에 도시된 바와같이, 종래기술에 의한 액압기계의 제동장치는, 미도시된 유압펌프로부터 토출되는 작동유가 액압기계의 본체(10)내로 유입시 도면상에서 좌측 또는 우측방향으로 절환되어 주행모터(2) 및 작업장치(붐 또는 아암)에 공급되는 작동유 흐름방향을 제어하는 평행밸브(1)와, 전술한 유압펌프로부터 공급되는 작동유에 따라 좌측 또는 우측방향으로 구동하는 주행모터(2)와, 전술한 평행밸브(1)와 주행모터(2)사이의 유로(4)에 설치되어 작동유 공급에 따라 구동하여 전술한 주행모터(2)제동을 제어하는 브레이크실린더(3)를 구비하여 구성된다.As shown in FIG. 1, in the braking device of a hydraulic machine according to the related art, when the hydraulic oil discharged from a hydraulic pump not shown flows into the main body 10 of the hydraulic machine, the driving motor is switched in a left or right direction on the drawing. (2) and a parallel valve (1) for controlling the flow direction of the hydraulic oil supplied to the work device (boom or arm), and a traveling motor (2) for driving in the left or right direction according to the hydraulic oil supplied from the hydraulic pump described above; And a brake cylinder (3) installed in the flow path (4) between the above-described parallel valve (1) and the traveling motor (2) and driven according to the supply of hydraulic oil to control braking of the traveling motor (2). .
미설명부호 6은 전술한 주행모터(2)에 작동유를 공급하는 유로(A)(B)에 병렬접속되는 유로(C)(D)에 설치되며 전술한 주행모터(2)의 작동유 공급유로(A)(B)에 소정의 설정압이상의 과부하 발생시 드레인시켜 관련부품을 보호하는 릴리프밸브, 7은 전술한 주행모터(2)의 작동유 공급유로(A)(B)에 병렬접속되는 유로(E)에 접속되며 파일럿 신호압(Pi)의 인가에 따라 구동하여 전술한 주행모터(2)의 사판경전각을 조정하는 액튜에이터(8)구동을 제어하는 제어밸브 이다.Reference numeral 6 is installed in the flow path (C) (D) connected in parallel to the flow path (A) (B) for supplying the hydraulic oil to the above-described driving motor (2) and the operating oil supply flow path of the above-described driving motor ( A) (B) is a relief valve to protect the related parts by draining when an overload occurs above a predetermined set pressure, 7 is a flow path (E) connected in parallel to the hydraulic oil supply flow path (A) (B) of the above-described driving motor (2) It is connected to the control valve for controlling the driving of the actuator (8) for driving in accordance with the application of the pilot signal pressure (Pi) to adjust the swash plate tilt angle of the traveling motor (2).
위와같이 구성되는 종래기술의 액압기계의 제동장치의 사용방법을 설명하면, 미도시된 유압펌프로부터 토출되는 작동유가 전술한 액압기계의 본체(10)내로 유입시 전술한 평행밸브(1)는 도면상에서 좌측 또는 우측방향으로 질환되며, 이와 동시에 전술한 평행밸브(1)와 주행모터(2)제동용 브레이크실린더(3)사이의 유료(4)를 통해 유압펌프로부터 토출되는 작동유가 전술한 브레이크실린더(3)의 피스톤실(3a)에 유입되며, 이로인해 브레이크피스톤(5)이 도면상에서 우측방향으로 이동하여 전술한 주행모터(2)의 제동상태를 해제시킴에 따라 전술한 주행모터(2)는 좌측 또는 우측방향으로 회전하게 된다.Referring to the method of using the braking device of the conventional hydraulic machine configured as described above, when the hydraulic oil discharged from the hydraulic pump not shown flows into the main body 10 of the hydraulic machine described above the above-described parallel valve (1) The hydraulic fluid discharged from the hydraulic pump through the toll (4) between the parallel valve (1) and the traveling motor (2), the brake cylinder (3) for braking (3) at the same time is diseased in the left or right direction. (3) flows into the piston chamber (3a), thereby causing the brake piston (5) to move in the right direction on the drawing to release the braking state of the above-described traveling motor (2), the traveling motor (2) Will rotate left or right.
그러나, 전술한 브레이크실린더(3)의 피스톤실(3a)에 유입되는 작동유는 유압펌프로부터 토출되어 작업장치를 구동시키는 고압의 작동유가 곧바로 유입됨에 따라, 전술한 브레이크피스톤(5)에 고압에 상응하는 피스톤링 장착이 요구되어 원가비용이 상승되며, 전술한 브레이크피스톤(5)에 고압이 작용하여 이의 내구성이 저하되는 문제점을 갖는 것이다.However, as the hydraulic oil flowing into the piston chamber 3a of the brake cylinder 3 described above is discharged from the hydraulic pump and immediately flows into the high pressure hydraulic oil for driving the work device, the hydraulic piston corresponds to the above-mentioned brake piston 5. Piston ring to be mounted is required to increase the cost, the high pressure acts on the above-described brake piston (5) has a problem that its durability is lowered.
따라서, 본 고안의 목적은, 굴삭기와 같은 건설차량에 장착되는 주행모터(TRACK MOTOR)를 제동시키는 브레이크실린더에 작업장치를 구동시키는 고압의 작동유 유입됨을 차단하여 브레이크실린더의 내구성을 향상시키며, 고가의 시일(SEAL) 사용이 불필요하여 원가비용을 줄일 수 있도록 한 액압기계의 제동장치를제공하는 것이다.Accordingly, an object of the present invention is to block the inflow of high-pressure hydraulic fluid driving the work device to the brake cylinder for braking the travel motor (TRACK MOTOR) mounted on a construction vehicle such as an excavator to improve the durability of the brake cylinder, It is to provide a brake system for a hydraulic machine that does not require the use of a seal, thereby reducing the cost.
도 1은 종래기술에 의한 액압기계의 제동장치의 유압회로도,1 is a hydraulic circuit diagram of a brake of a hydraulic machine according to the prior art;
도 2는 본 고안의 실시예에 의한 액압기계의 제동장치의 유압회로도,2 is a hydraulic circuit diagram of a braking device of a hydraulic machine according to an embodiment of the present invention,
도 3은 본 고안의 실시예에 의한 액압기계의 제동장치의 요부발췌 단면도 이다.3 is a cross-sectional view of the main portion of the brake of the hydraulic machine according to an embodiment of the present invention.
*도면중 주요 부분에 사용된 부호의 설명* Explanation of symbols used in the main part of the drawing
1: 평행밸브1: parallel valve
2: 주행모터2: driving motor
3: 브레이크실린더3: brake cylinder
3a: 피스톤실3a: piston seal
4,A-E: 유로4, A-E: Euro
5: 피스톤5: piston
9: 압력조정밸브9: pressure regulating valve
11: 본체11: body
12: 출구측 유로12: outlet side flow path
13: 입구측 유로13: inlet flow path
14: 스플14: Spool
15: 수압용 걸림턱15: Hydraulic pressure jam
16: 제동용 탄성부재16: elastic member for braking
전술한 본 고안의 목적은, 유압펌프와, 상기 유압펌프에 연결되어 작동유 공급에 따라 좌측 또는 우측방향으로 회전하는 주행모터와, 상기 유압펌프와 주행모터사이에 설치되어 상기 주행모터 및 작업장치에 공급되는 작동유의 흐름방향을 제어하는 평행밸브와, 상기 평행밸브와 주행모터사이에 설치되어 상기 유압펌프로부터 작동유 공급으로 인해 상기 주행모터를 제동하는 브레이크실린더를 구비하는 액압기계의 제동장치에 있어서, 상기 평행밸브와 상기 브레이크실린더사이의 유로에 설치되며, 상기 브레이크실린더의 피스톤실에 소정의 설정압이상의 고압 발생시 구동하여 상기 평행밸브를 경유하는 고압의 작동유가 상기 피스톤실에 유입됨을 차단하는 압력조절밸브를 구비하여 구성됨을 특징으로 하는 액압기계의 제동장치를 제공함에 의해 달성된다.The object of the present invention described above is a hydraulic motor, a traveling motor connected to the hydraulic pump and rotated in a left or right direction according to the supply of hydraulic oil, and installed between the hydraulic pump and the traveling motor to the traveling motor and the work device. In the braking device of a hydraulic machine comprising a parallel valve for controlling the flow direction of the hydraulic oil supplied, and a brake cylinder provided between the parallel valve and the traveling motor to brake the traveling motor due to the supply of hydraulic oil from the hydraulic pump, Pressure adjustment is provided in the flow path between the parallel valve and the brake cylinder, the high-pressure operating oil passing through the parallel valve to drive the piston chamber of the brake cylinder when a high pressure of a predetermined set pressure or more is introduced into the piston chamber Providing a braking device for a hydraulic machine, characterized in that provided with a valve It is achieved.
바람직한 실시예에 의하면, 상기 압력조절밸브는 상기 액압기계의 본체내에 내장되어 설치된다.According to a preferred embodiment, the pressure regulating valve is installed in the main body of the hydraulic machine.
바람직한 실시예에 의하면, 상기 브레이크실린더의 피스톤실에 작용하는 소정의 설정압 셋팅은, 상기 액압기계의 본체에 내장되어 상기 피스톤실에 소정의 설정압이상의 고압발생시 상기 피스톤실 유로를 차단하는 스플 외주연에 형성되는 수압용 걸림턱의 단면적과, 상기 본체와 상기 스플단부사이에 장착되며 상기 피스톤실에 소정의 설정압이하로 압력감소시 상기 스플을 복귀시켜 상기 피스톤실 유로를개방시키는 제동용 탄성부재의 탄성력 차이에 의해 설정된다.According to a preferred embodiment, a predetermined set pressure setting acting on the piston chamber of the brake cylinder is embedded in the main body of the hydraulic machine, and other than a spool to block the piston chamber flow path when a high pressure is generated in the piston chamber above a predetermined set pressure. A braking elasticity is provided between the cross-sectional area of the hydraulic pressure catching jaw formed at the periphery and between the main body and the spool end, and returns the spool to open the piston chamber flow path when the pressure decreases below the predetermined set pressure in the piston chamber. It is set by the difference in elastic force of the members.
바람직한 실시예에 의하면, 상기 브레이크실린더의 피스톤실에 작용하는 소정의 설정압 셋팅은, 상기 스플을 시프트이동가능하게 상기 액압기계의 본체일측에 장착되는 플러그의 조정으로 설정된다.According to a preferred embodiment, the predetermined set pressure setting acting on the piston chamber of the brake cylinder is set by adjustment of a plug mounted on one side of the main body of the hydraulic machine so as to shift the spool.
이하, 본 고안의 바람직한 실시예를 첨부도면에 따라 상세하게 설명하며, 이로인해 본 고안의 기술적인 범주가 한정되는 것은 아니다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are not intended to limit the technical scope of the present invention.
도 2는 본 고안의 실시예에 의한 액압기계의 제동장치의 유압회로도, 도 3은 본 고안의 실시예에 의한 액압기계의 제동장치의 요부발췌 단면도 이다.2 is a hydraulic circuit diagram of a brake of a hydraulic machine according to an embodiment of the present invention, Figure 3 is a cross-sectional view of the main portion of the brake of the hydraulic machine according to an embodiment of the present invention.
도 2 및 도 3에 도시된 바와같이, 유압펌프로부터 토출되는 작동유가 액압기계의 본체(10)내로 유입시 도면상에서 좌측 또는 우측방향으로 질환되어 주행모터(2) 및 작업장치(붐 또는 아암)에 공급되는 작동유 흐름방향을 제어하는 평행밸브(1)와, 전술한 유압펌프로부터 토출되는 작동유에 따라 좌측 또는 우측방향으로 구동하는 주행모터(2)와, 전술한 평행밸브(1)와 주행모터(2)사이의 유로(4)에 설치되어 작동유 공급에 따라 구동하여 전술한 주행모터(2)제동을 제어하는 브레이크실린더(3)를 구비하는 구성은, 도 1에 도시된 것과 동일하게 적용되므로 이에대한 상세한 설명은 생략하며, 중복되는 인용부호는 동일하게 표기하였다.2 and 3, when the hydraulic oil discharged from the hydraulic pump flows into the main body 10 of the hydraulic machine, the driving motor 2 and the work device (boom or arm) are diseased in the left or right direction on the drawing. Parallel valve (1) for controlling the flow direction of the hydraulic oil supplied to the drive motor, the driving motor (2) for driving in the left or right direction in accordance with the hydraulic oil discharged from the hydraulic pump described above, the parallel valve (1) and the traveling motor described above Since the configuration provided with the brake cylinder 3 which is installed in the flow path 4 between (2) and drives according to hydraulic fluid supply and controls the above-mentioned driving motor 2 braking is applied similarly to that shown in FIG. Detailed description thereof will be omitted, and duplicate quotation marks are the same.
따라서, 본 고안의 바람직한 실시예에 의하면, 전술한 평행밸브(1)와 주행모터(2)사이의 유로(4)에 전술한 피스톤실(3a)에 소정의 설정압이상의 고압발생시 전술한 평행밸브(1)를 경유하는 고압의 작동유가 전술한 피스톤실(33)에 유입됨을 차단하는 압력조절밸브(9)가 설치된다. 이때, 전술한 압력조절밸브(9)는 본체(11)와, 이 본체(11)내부에 형성되어 전술한 피스톤실(3a)에 연통되는 출구측 유로(12) 및전술한 평행밸브(1)에 연통되도록 형성되는 입구측 유로(13)와, 전술한 본체(11)내부에 시프트이동가능하게 장착되어 전술한 입구측 유로(13)와 출구측 유로(12)를 개폐시키는 스플(14)을 구비한다.Therefore, according to a preferred embodiment of the present invention, the above-described parallel valve when the high pressure of the above-mentioned predetermined pressure in the piston chamber 3a in the above-mentioned flow path 4 between the parallel valve 1 and the traveling motor 2 occurs. A pressure regulating valve 9 is provided to block the flow of the high pressure hydraulic oil via (1) into the aforementioned piston chamber 33. At this time, the above-mentioned pressure regulating valve 9 is formed in the main body 11, the main body 11, the outlet side flow passage 12 and the parallel valve 1 described above in communication with the piston chamber 3a. An inlet side flow passage 13 formed to communicate with the main body 11 and a spool 14 mounted on the inside of the main body 11 so as to be shiftable, and opening and closing the inlet side flow passage 13 and the outlet side flow passage 12. Equipped.
전술한 브레이크실린더(3)의 피스톤실(3a)에 작용하는 소정의 설정압을 조정할 수 있는 수단으로, 전술한 스플(14)외주연에 전술한 피스톤실(3a)에 소정의 설정압이상의 고압발생시 전술한 스플(14)을 절환시켜 전술한 출구측 유로(12)를 개폐시키는 수압용 걸림턱(15)이 형성되며, 전술한 본체(11)와 스플(14)단부사이에 전술한 피스톤실(3a)에 소정의 설정압이하로 감소시 전술한 스플(14)을 복귀시켜 전술한 출구측 유로(12)를 개방시키는 제동용 탄성부재(16)가 장착된다. 또는, 전술한 제동용 탄성부재(16)의 탄성력 조정으로 인해 전술한 스플(14)을 시프트이동 시킬 수 있도록 전술한 본체(11)일측에 플러그(17)가 고정된다.A means for adjusting the predetermined set pressure acting on the piston chamber 3a of the brake cylinder 3 described above, and the high pressure equal to or higher than the predetermined set pressure in the piston chamber 3a described above on the outer circumference of the spool 14 described above. A hydraulic pressure catching jaw 15 for opening and closing the outlet passage 12 by switching the above-mentioned spool 14 when it is generated is formed, and the above-described piston chamber between the main body 11 and the spool 14 end. A braking elastic member 16 is mounted to 3a to return the above-mentioned spool 14 when the pressure is reduced below a predetermined set pressure to open the outlet-side flow passage 12 described above. Alternatively, the plug 17 is fixed to one side of the main body 11 so as to shift the above-mentioned spool 14 due to the adjustment of the elastic force of the above-described braking elastic member 16.
위와같이 구성되는 본 고안의 실시예에 의한 액압기계의 제동장치의 사용방법을 도 2 및 도 3을 참조하여 설명하면 다음과 같다.Referring to Figures 2 and 3 how to use the braking device of the hydraulic machine according to an embodiment of the present invention configured as described above are as follows.
미도시된 유압펌프로부터 토출되는 작동유가 전술한 액압기계의 본체(10)내로 유입시 좌측 또는 우측방향으로 절환되는 전술한 평행밸브(1)를 경유하는 고압의 작동유는, 전술한 압력조정밸브(9)의 입구측 유로(13) 및 출구측 유로(12)를 경유하여 전술한 브레이크실린더(3)의 피스톤실(3a)에 유입되며, 이로인해 브레이크피스톤(5)이 도면상에서 우측방향으로 이동하여 전술한 주행모터(2)의 제동상태를 해제시킴에 따라, 전술한 주행모터(2)는 좌측 또는 우측방향으로 회전하게 된다.When the hydraulic oil discharged from the hydraulic pump (not shown) flows into the main body 10 of the hydraulic machine described above, the high-pressure hydraulic oil passing through the aforementioned parallel valve 1 is switched to the pressure adjusting valve ( 9 is introduced into the piston chamber 3a of the brake cylinder 3 described above via the inlet flow passage 13 and the outlet flow passage 12, which causes the brake piston 5 to move to the right in the drawing. By releasing the braking state of the above-described traveling motor 2, the above-described traveling motor 2 is rotated in the left or right direction.
이때, 전술한 브레이크실린더(3)의 피스톤실(3a)에 소정의 설정압이상의 고압발생으로 인해 전술한 스플(14)외주연에 형성된 수압용 걸림턱(15)에 작용하는 고압상태의 압력이 전술한 제동용 탄성부재(16)의 탄성력보다 크게됨에 따라, 전술한 스플(14)을 도면상에서 우측방향으로 절환시켜 전술한 출구측 유로(12)를 폐쇄하게 된다. 이로인해 유압펌프로부터 토출되어 전술한 평행밸브(1)를 통과하는 고압의 작동유는 전술한 브레이크실린더(3)의 피스톤실(3a)에 공급됨이 차단된다.At this time, the pressure of the high pressure state acting on the hydraulic pressure catching jaw 15 formed on the outer periphery of the above-mentioned spool 14 due to the generation of a high pressure higher than a predetermined set pressure in the piston chamber 3a of the brake cylinder 3 described above. As the elastic force of the above-described braking elastic member 16 is greater, the above-mentioned outlet 14 is closed by switching the above-mentioned spool 14 to the right in the drawing. As a result, the high pressure hydraulic fluid discharged from the hydraulic pump and passing through the parallel valve 1 is blocked from being supplied to the piston chamber 3a of the brake cylinder 3 described above.
따라서, 유압펌프로부터 작동유의 공급이 중단되는 경우, 전술한 피스톤실(3a)내의 작동유는 전술한 피스톤(5)에 내장되는 드레인용 오리피스(18)를 경유하여 배출되며, 전술한 제동용 탄성부재(16)의 복귀됨에 의해 전술한 주행모터(2)는 제동되어 정지하게 된다.Therefore, when the supply of the hydraulic oil is stopped from the hydraulic pump, the hydraulic oil in the piston chamber 3a described above is discharged via the drain orifice 18 built in the piston 5 described above, and the above-mentioned braking elastic member By the return of 16, the above-described traveling motor 2 is braked and stopped.
한편, 전술한 피스톤실(3a)의 압력이 소정의 설정압력 이하로 감소되는 경우, 전술한 제동용 탄성부재(16)의 복원력에 의해 전술한 스플(14)은 초기위치로 복귀됨에 따라, 전술한 평행밸브(1)를 통과하는 고압의 작동유는 전술한 유로(4)와 연통되는 입구측 유로(13) 및 출구측 유로(12)를 통과하여 전술한 피스톤실(3a)에 공급되어 전술한 주행모터(2)의 제동을 해제시키며, 이로인해 전술한 주행모터(2)는 좌측 또는 우측방향으로 회전하게 된다.On the other hand, when the pressure of the above-mentioned piston chamber (3a) is lowered below the predetermined set pressure, the above-mentioned spool 14 is returned to the initial position by the restoring force of the above-mentioned braking elastic member 16, The high-pressure hydraulic oil passing through the parallel valve 1 is supplied to the piston chamber 3a described above through the inlet flow passage 13 and the outlet flow passage 12 communicating with the flow passage 4 described above. The braking of the traveling motor 2 is released, thereby causing the above-described traveling motor 2 to rotate left or right.
이상에서와같이, 바람직한 실시예에 의하면, 굴삭기와 같은 건설차량에 장착되는 주행모터를 제동시키는 브레이크실린더에 작업장치를 구동시키는 고압의 작동유 유입됨을 차단하여 브레이크실린더의 내구성을 향상시키며, 고가의 시일(SEAL) 사용이 불필요하여 원가비용을 줄일 수 있도록 한 이점을 갖는다.As described above, according to a preferred embodiment, by blocking the inflow of high-pressure hydraulic fluid driving the work device to the brake cylinder for braking the traveling motor mounted on the construction vehicle, such as an excavator to improve the durability of the brake cylinder, the expensive seal The use of SEAL has the advantage of reducing the cost.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019970044091U KR200264244Y1 (en) | 1997-12-30 | 1997-12-30 | Brake system of hydraulic machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019970044091U KR200264244Y1 (en) | 1997-12-30 | 1997-12-30 | Brake system of hydraulic machinery |
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| Publication Number | Publication Date |
|---|---|
| KR19990031380U KR19990031380U (en) | 1999-07-26 |
| KR200264244Y1 true KR200264244Y1 (en) | 2002-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR2019970044091U KR200264244Y1 (en) | 1997-12-30 | 1997-12-30 | Brake system of hydraulic machinery |
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| US8241010B2 (en) * | 2009-12-03 | 2012-08-14 | Caterpillar Global Mining Llc | Hydraulic reservoir for hydraulic regenerative circuit |
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