KR100397795B1 - hydraulic circuit for motor car repair lift - Google Patents
hydraulic circuit for motor car repair lift Download PDFInfo
- Publication number
- KR100397795B1 KR100397795B1 KR10-2001-0030584A KR20010030584A KR100397795B1 KR 100397795 B1 KR100397795 B1 KR 100397795B1 KR 20010030584 A KR20010030584 A KR 20010030584A KR 100397795 B1 KR100397795 B1 KR 100397795B1
- Authority
- KR
- South Korea
- Prior art keywords
- hydraulic
- hydraulic oil
- valve block
- pair
- valve
- Prior art date
Links
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 74
- 238000012423 maintenance Methods 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims 1
- 230000007257 malfunction Effects 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 4
- 238000000151 deposition Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S5/00—Servicing, maintaining, repairing, or refitting of vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
- B60R16/0234—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions related to maintenance or repairing of vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
- B60W50/0205—Diagnosing or detecting failures; Failure detection models
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
본 발명은 자동차정비용 리프트의 유압회로에 관한 것으로서, 유압펌프와 제1유압실린더 및 한 쌍의 제2유압실린더 사이에 유압펌프의 토출유로와 연통되도록 단일개로 천공되어 작동유를 유입시키는 작동유유입로와, 작동유유입로에 병렬로 연결가능하게 천공된 제1유압실린더 및 한 쌍의 제2유압실린더에 각각 대응하는 작동유배출로와, 작동유유입로에 대해 각 작동유배출로를 독립적으로 연통시키도록 천공되어 있는 연통로를 구비하는 밸브블럭; 밸브블럭의 제1유압실린더에 대응하는 작동유배출로의 일측에 설치되는 제1절환밸브; 및 밸브블럭의 한 쌍의 제2유압실린더에 대응하는 작동유배출로에 각각 설치되는 한 쌍의 제2절환밸브(16,17)를 포함한다. 이에 의해, 차량의 점검 또는 수리용 리프트의 유압실린더에 대해 작동유공급을 제어하는 밸브블럭 내부에 형성되는 유로를 단순화하여 해당 유압부품의 장착개소를 줄임에 따라 이물질 증착으로 인해 작동불량이 발생되는 것을 방지할 수 있고, 밸브블럭의 단일화로 원가비용을 절감가능하며, 밸브블럭 내에 형성되는 유로를 연통시키도록 천공된 구멍을 연통시킨후 폐쇄하는 작업이 불필요하게 된다.The present invention relates to a hydraulic circuit of a vehicle maintenance lift, a hydraulic oil inlet passage which is drilled into a single piece so as to communicate with the discharge passage of the hydraulic pump between the hydraulic pump, the first hydraulic cylinder and the pair of second hydraulic cylinders And a hydraulic oil discharge passage corresponding to each of the first hydraulic cylinder and the pair of second hydraulic cylinders drilled so as to be connected in parallel to the hydraulic oil inlet passage, and perforated to independently communicate each hydraulic oil outlet passage with respect to the hydraulic oil inlet passage. A valve block having a communication path therein; A first switching valve installed at one side of the hydraulic oil discharge path corresponding to the first hydraulic cylinder of the valve block; And a pair of second switching valves 16 and 17 respectively installed in the hydraulic oil discharge paths corresponding to the pair of second hydraulic cylinders of the valve block. This simplifies the flow path formed inside the valve block for controlling the hydraulic oil supply to the hydraulic cylinder of the inspection or repair lift of the vehicle, thereby reducing the installation location of the corresponding hydraulic component, thereby causing malfunction. It is possible to prevent the cost, and to reduce the cost by the unification of the valve block, and the operation of closing and then communicating the perforated holes to communicate the flow path formed in the valve block is unnecessary.
Description
본 발명은 차량을 점검 또는 수리시 사용되는 리프트의 유압실린더에 대해 유압펌프로부터 토출되는 작동유공급을 제어하는 밸브블럭 내부에 형성되는 유로를 단순화시켜 유닛트화 한 자동차정비용 리프트의 유압회로에 관한 것이다.The present invention relates to a hydraulic circuit of an automobile fixed-cost lift united by simplifying a flow path formed inside a valve block that controls a hydraulic oil supply discharged from a hydraulic pump to a hydraulic cylinder of a lift used when inspecting or repairing a vehicle. .
더욱 상세하게는, 차량이 탑재되는 4주식과 시저스(scissors) 승강장 및 4주식과 시저스 승강장에 절첩가능하게 장착되는 한 쌍의 잭 구동용 유압실린더에 각각 공급되는 작동유를 제어하도록 사용되는 밸브블럭 내부에 형성되는 유로를 단순화시켜 밸브블럭을 단일화하며, 밸브블럭에 내설되는 해당 유압부품의 작동불량 발생되는 것을 방지할 수 있도록 한 자동차정비용 리프트의 유압회로에 관한 것이다.More specifically, inside the valve block used to control the hydraulic fluid supplied to the four-stock and scissors platforms on which the vehicle is mounted and the pair of jack-driven hydraulic cylinders foldably mounted to the four-stock and scissor platforms. The present invention relates to a hydraulic circuit of a vehicle maintenance lift that simplifies the flow path formed in the valve block to unify a valve block and prevents a malfunction of a corresponding hydraulic component in the valve block.
도 1 및 도 2에 도시된 바와 같이, 종래 기술에 의한 자동차정비용 리프트 의 유압회로 및 밸브블럭은, 자동차를 점검 또는 수리시 자동차가 탑재되는 4주식 등의 승강장을 승하강시키는 메인 유압실린더와, 승강장에 절첩가능하게 장착되어 자동차의 타이어 또는 휠얼라인먼트 등을 수리하기 위한 한 쌍의 2단 잭(jack)에 각각 공급되는 작동유를 제어하도록 사용된다.As shown in Figure 1 and 2, the hydraulic circuit and valve block of the vehicle maintenance lift according to the prior art, the main hydraulic cylinder for lifting up and down the platform, such as a four-stock stock is mounted on the vehicle inspection or repair It is foldably mounted to the platform and used to control the hydraulic oil supplied to each of a pair of two-stage jacks for repairing tires or wheel alignment of an automobile.
즉, 작동유를 저장하며 모터(1)에 연결되어 구동하는 미도시된 유압펌프를 갖는 유압탱크(2)와, 유압펌프에 연결되어 승강장을 승하강시키는 메인 유압실린더및 승강장에 절첩가능하게 장착되는 2단 잭에 각각 공급되는 작동유를 제어하는 밸브블럭(3)과, 밸브블럭(3)의 외측면에 장착되며 전기적 신호 인가에 따라 절환하여 메인 유압실린더 및 2단 잭의 기동, 정지 및 방향전환을 제어하는 솔레노이드밸브 어셈블리(4)와, 밸브블럭(3)에 내설되어 메인 유압실린더 및 2단 잭에 공급되는 작동유의 흐름방향을 제어하는 공급측 제1,2체크밸브(5,5a)와 귀환측 제1,2체크밸브 (6,6a)를 구비한다.That is, the hydraulic tank (2) having a hydraulic pump (not shown) connected to the motor (1) and stored to drive the hydraulic oil, and is connected to the hydraulic pump and is foldably mounted to the main hydraulic cylinder and platform for lifting up and down the platform The valve block 3 for controlling the hydraulic oil supplied to the second stage jack and the valve block 3 are mounted on the outer surface of the valve block 3 and switched according to the application of electrical signals to start, stop and change the direction of the main hydraulic cylinder and the second stage jack. And the supply side first and second check valves 5 and 5a installed in the solenoid valve assembly 4 and the valve block 3 to control the flow direction of the hydraulic oil supplied to the main hydraulic cylinder and the second stage jack. Side first and second check valves 6 and 6a.
미 설명부호 7은 전기적 신호 인가시 절환되어 공급측 및 귀환측 유로를 연통시키는 솔레노이드밸브 이다.Reference numeral 7 is a solenoid valve that is switched when an electrical signal is applied to communicate the supply and return flow paths.
따라서, 전술한 모터(1)의 구동으로 인해 유압펌프로 부터 토출되는 작동유(P)는 밸브블럭(3)의 내부에 형성되는 브릿지회로(hydraulic bridge circuit)를 경유하여 메인 유압실린더 및 2단 잭에 각각 공급되어 이들을 구동시킬 수 있다.Therefore, the hydraulic oil P discharged from the hydraulic pump due to the driving of the motor 1 described above is connected to the main hydraulic cylinder and the two-stage jack via a hydraulic bridge circuit formed in the valve block 3. Can be supplied respectively to drive them.
즉, 전술한 유압펌프로 부터 토출되는 작동유(P)는 브릿지회로를 형성하는 공급측 제1체크밸브(5), 솔레노이드밸브(7) 및 공급측 제2체크밸브(5a)를 차례로 경유하여 메인 유압실린더 및 2단 잭에 공급되므로 리프트를 들어올리게 되며, 자중으로 인해 리프트의 하강시 메인 유압실린더 및 2단 잭으로 부터 귀환되는 작동유는 브릿지회로를 형성하는 귀환측 제1체크밸브(6), 솔레노이드밸브(7) 및 귀환측제2체크밸브(6a)를 경유하여 유압탱크(2)로 리턴된다.That is, the hydraulic oil P discharged from the hydraulic pump described above passes through the supply side first check valve 5, the solenoid valve 7, and the supply side second check valve 5a, which form a bridge circuit, in order. And the second stage jack is supplied to lift the lift, and the hydraulic oil returned from the main hydraulic cylinder and the second stage jack when the lift descends due to its own weight is the return side first check valve 6 and the solenoid valve forming the bridge circuit. (7) and the return side second check valve 6a are returned to the hydraulic tank 2.
그런데, 이러한 종래의 유압회로에서는, 밸브블럭(3)에 내설되어 브릿지회로를 형성하는 공급측 및 귀환측 체크밸브(5,5a)(6,6a)와, 솔레노이드밸브(7)에 습동부위에서 발생하는 금속물질 등의 이물질이 누적되어 작동불량을 초래하는 문제점이 있다.By the way, in such a conventional hydraulic circuit, the supply side and return side check valves 5, 5a, 6, 6a, which are built in the valve block 3 and form a bridge circuit, are generated at sliding portions in the solenoid valve 7. There is a problem in that foreign matter such as a metal material accumulates to cause a malfunction.
그리고, 종래의 밸브블럭(3)은 유압펌프로부터 토출되는 작동유에 대해 연통되도록 동일한 브릿지회로가 내부에 각각 형성된 3개의 하우징(3a,3b,3c)이 밀착되어 메인 유압실린더 및 2단 잭에 공급되는 작동유를 제어하게 되므로, 부품수 증가로 인해 원가비용이 상승되며 밸브블럭(3)의 내부에 브릿지회로를 형성하도록 유로를 천공하게 되므로 작업공수의 증가로 인해 제작비용이 상승하여 가격경쟁력이 떨어지는 문제점이 있다.In the conventional valve block 3, three housings 3a, 3b, and 3c each having the same bridge circuit formed therein are in close contact with each other so as to communicate with hydraulic fluid discharged from the hydraulic pump, and are supplied to the main hydraulic cylinder and the second stage jack. Since the operating oil is controlled, the cost cost is increased due to the increase in the number of parts, and the flow path is drilled to form a bridge circuit inside the valve block 3, so the production cost is increased due to the increase in the labor and the price is lowered. There is a problem.
종래의 유압회로에서는 또한, 전술한 밸브블럭(3)의 내부에 브릿지회로를 형성하기 위하여 공급측 제1,2체크밸브(5,5a), 솔레노이드밸브(7) 및 귀환측 제1,2체크밸브(6,6a)를 상호 연통시키도록 유로를 천공작업(drilling)후, 밸브블럭(3)의 외부에서 천공시킨 구멍을 폐쇄시키는 작업이 요구되므로 밸브블럭(3)을 제작 및 조립하는 전체적인 작업공수가 증가되는 문제점을 갖게 된다.In the conventional hydraulic circuit, the supply side first and second check valves 5 and 5a, the solenoid valve 7 and the return side first and second check valves are also used to form a bridge circuit inside the valve block 3 described above. After drilling the flow path so as to communicate (6,6a) with each other, it is required to close the hole drilled from the outside of the valve block (3), so the overall workmanship of manufacturing and assembling the valve block (3) There is a problem that is increased.
따라서, 본 발명의 목적은, 차량의 점검 또는 수리시 사용되는 리프트의 유압실린더에 대해 작동유 공급을 제어하는 밸브블럭 내부에 형성되는 유로를 단순화하여, 해당 유압부품의 장착개소를 줄임에 따라 이물질 증착으로 인한 작동불량이 발생되는 것을 방지할 수 있도록 한 자동차정비용 리프트의 유압회로를 제공하는 것이다.Therefore, an object of the present invention is to simplify the flow path formed inside the valve block for controlling the hydraulic oil supply to the hydraulic cylinder of the lift used in the inspection or repair of the vehicle, depositing foreign substances according to reducing the mounting place of the hydraulic component It is to provide a hydraulic circuit of a car maintenance lift to prevent the malfunction caused by the.
본 발명의 다른 목적은, 밸브블럭의 단일화로 가공비를 줄이고 원가비용을 절감하여 당해 분야에서 가격경쟁력을 갖도록 한 자동차정비용 리프트의 유압회로를 제공하는 것이다.It is another object of the present invention to provide a hydraulic circuit of a fixed cost lift for automobiles to reduce the processing cost and reduce the cost cost by unifying the valve block to have a price competitiveness in the art.
본 발명의 또 다른 목적은, 밸브블럭에 형성되는 유로를 병렬로 연통시키도록 천공된 구멍을 연통시킨후 폐쇄하는 작업이 불필요하여 밸브블럭의 가공공정을 단축할 수 있도록 한 자동차정비용 리프트의 유압회로를 제공하는 것이다.Still another object of the present invention is to provide a hydraulic system for a fixed cost lift for reducing the operation of the valve block by eliminating the need for the operation of closing and closing the perforated holes to communicate the flow paths formed in the valve block in parallel. To provide a circuit.
본 발명의 또 다른 목적은, 작동유의 흐름방향을 제어하는 유압부품을 밸브블럭에 내설하여 사후관리가 용이하고 조립시 인접 부품과의 상호 간섭되는 것을 방지할 수 있도록 한 자동차정비용 리프트의 유압회로를 제공하는 것이다.Still another object of the present invention is to install a hydraulic component for controlling the flow direction of the hydraulic oil in the valve block, so that the aftercare is easy and prevents mutual interference with adjacent components during assembly. To provide.
도 1은 종래 기술에 의한 자동차정비용 리프트의 유압회로의 요부발췌도,1 is an excerpt of an essential part of a hydraulic circuit of a vehicle maintenance lift according to the prior art;
도 2는 종래 기술에 의한 자동차정비용 리프트의 유압회로에 이용되는 밸브블럭의 개략도,2 is a schematic view of a valve block used in a hydraulic circuit of a vehicle maintenance lift according to the prior art;
도 3은 본 발명에 따른 자동차정비용 리프트의 유압회로도,3 is a hydraulic circuit diagram of a vehicle maintenance lift according to the present invention;
도 4는 도 3의 유압회로에 이용되는 밸브블럭의 개략적인 평면도,4 is a schematic plan view of a valve block used in the hydraulic circuit of FIG.
도 5는 도 4의 측면도.5 is a side view of FIG. 4.
*도면중 주요 부분에 사용된 부호의 설명* Explanation of symbols used in the main part of the drawing
10; 모터 11; 유압펌프10; Motor 11; Hydraulic pump
12; 제1유압실린더 13,14; 제2유압실린더12; First hydraulic cylinder 13,14; 2nd hydraulic cylinder
15; 제1절환밸브 16,17; 제2절환밸브15; First switching valves 16 and 17; 2nd switching valve
18,20; 오리피스 19,21; 체크밸브18,20; Orifices 19,21; Check valve
22; 밸브블럭 23; 작동유유입로22; Valve block 23; Working flow path
24,25,26; 작동유배출로24,25,26; Working oil discharge furnace
전술한 본 발명의 목적은, 본 발명에 따라서, 모터에 의해 구동되는 유압펌프, 및 상기 유압펌프로부터의 작동유로 차량이 탑재되는 승강장을 승하강시키는 제1유압실린더와 상기 승강장에 절첩가능하게 장착되는 잭을 구동시키는 한 쌍의 제2유압실린더를 구비하는 자동차정비용 리프트의 유압회로에 있어서, 상기 유압펌프와 제1유압실린더 및 상기 한 쌍의 제2유압실린더 사이에 배치되며, 상기 유압펌프의 토출유로와 연통되도록 단일개로 천공되어 상기 유압펌프로부터의 작동유를 유입시키는 작동유유입로와, 상기 작동유유입로에 병렬로 연결가능하게 천공된 상기 제1유압실린더 및 한 쌍의 제2유압실린더에 각각 대응하는 작동유배출로와, 상기 작동유유입로에 대해 상기 각 작동유배출로를 독립적으로 연통시키도록 천공되어 있는 연통로를 구비하는 밸브블럭; 상기 밸브블럭의 상기 제1유압실린더에 대응하는 상기 작동유배출로의 일측에 설치되어, 전기적 신호인가시 공급되는 작동유의 흐름을 제어하는 제1절환밸브; 및 상기 밸브블럭의 상기 한 쌍의 제2유압실린더에 대응하는 작동유배출로에 각각 설치되어, 전기적 신호인가시 공급되는 작동유의 흐름을 제어하는 한 쌍의 제2절환밸브를 포함하여 구성되는 자동차정비용 리프트의 유압회로에 의하여 달성된다.여기서, 상기 제2절환밸브의 입구측에 각각 설치되며, 상기 유압펌프로부터 토출되는 여분의 작동압을 상기 제2유압실린더에 공급하여 구동속도를 가속시키는 압력보상용 오리피스, 및 작동유 역류방지용 체크밸브를 더 포함하는 것이 바람직하다.The object of the present invention described above is, in accordance with the present invention, a hydraulic pump driven by a motor, a first hydraulic cylinder for lifting up and down a platform on which a vehicle is mounted with hydraulic oil from the hydraulic pump, and a foldable mounting on the platform. In a hydraulic circuit of a vehicle maintenance lift having a pair of second hydraulic cylinder for driving a jack, the hydraulic pump is disposed between the first hydraulic cylinder and the pair of second hydraulic cylinder, the hydraulic pump A hydraulic oil inlet passage which is drilled into a single passage so as to communicate with the discharge passage of the hydraulic oil inlet, and the first hydraulic cylinder and a pair of second hydraulic cylinders perforated in parallel with the hydraulic oil inlet passage. Respectively corresponding working oil discharge passages and communication passages perforated to independently communicate the respective hydraulic oil discharge passages with respect to the hydraulic oil inlet passages. Degrading the valve block; A first switching valve installed at one side of the hydraulic oil discharge path corresponding to the first hydraulic cylinder of the valve block to control a flow of hydraulic oil supplied when an electrical signal is applied; And a pair of second switching valves installed in the hydraulic oil discharge paths corresponding to the pair of second hydraulic cylinders of the valve block to control the flow of the hydraulic oil supplied when the electrical signal is applied. The hydraulic circuit of the cost lift is provided. Here, the pressures are respectively provided at the inlet side of the second switching valve, and supply the extra hydraulic pressure discharged from the hydraulic pump to the second hydraulic cylinder to accelerate the driving speed. It is preferable to further include a compensation orifice, and a check valve for preventing the hydraulic oil backflow.
이하, 본 발명의 바람직한 실시예를 첨부도면에 따라 상세하게 설명하되, 이는 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있을 정도로 설명하기 위한 것이지, 이로 인해 본 발명의 기술적인 사상 및 범주가 한정되는 것을 의미하지는 않는 것이다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are intended to be described to be easily carried out by those of ordinary skill in the art to which the present invention pertains, and therefore the technical of the present invention This does not mean that the idea and the scope are limited.
도 3 내지 도 5에 도시된 바와 같이, 본 자동차정비용 리프트의 유압회로는, 모터(10)에 의해 구동되는 유압펌프(11)와, 유압펌프(11)의 토출유로에 병렬로 연결되며 구동시 차량이 탑재되는 승강장(미도시됨)을 승하강시키는 제1유압실린더 (12) 및 승강장에 절첩가능하게 장착되는 잭(미도시됨)을 구동시키는 한 쌍의 제2유압실린더(13,14)와, 유압펌프(11)와 제1유압실린더(12) 및 한 쌍의 제2유압실린더(13,14) 사이에 마련되는 밸브블럭(22), 그리고, 밸브블럭(22)에 형성된 작동유유로에 설치되는 제1 및 제2전환밸브(15,16,17)를 구비한다.밸브블럭(22)은, 유압펌프(11)의 토출유로와 연통되도록 그 내부에 단일개로 천공(drilling)되어 유압펌프(11)로부터 토출되는 작동유가 유입되는 작동유유입로 (23)와, 작동유유입로(23)의 상부에 작동유유입로(23)에 대해 병렬로 연통되도록 천공되어 상호 평행한 작동유배출로(24,25,26)와, 작동유유입로(23)에 대해 작동유 배출로(24,25,26)를 각각 독립적으로 연통시키도록 천공되는 연통로(27,28,29)를 구비한다.제1절환밸브(15)는 밸브블럭(22)의 제1유압실린더(12)에 대응하는 작동유배출로(24), 보다 구체적으로는, 연통로(27)와 작동유배출로(24)가 상호 연통하는 밸브블럭(22)의 외측에서 인접하는 부분에 설치된다. 이 제1절환밸브(15)는 전기적신호인가시 절환되어 제1유압실린더(12)에 공급되는 작동유의 흐름을 제어한다.그리고, 한 쌍의 제2절환밸브(16,17)는 한 쌍의 제2유압실린더(13,14)에 대응하는 작동유배출로(25,26), 보다 구체적으로는, 연통로(28,29)와 작동유배출로 (25,26)가 상호 연통하는 밸브블럭의 외측에서 인접하는 부분에 설치된다. 이러한, 제2절환밸브(16,17) 역시 전기적 신호인가시 절환되어 제2유압실린더(13,14)에 공급되는 작동유의 흐름을 각각 제어한다.그리고, 한 쌍의 제2절환밸브(16,17)의 입구측에는 유압펌프(11)로부터 토출되는 여분의 작동압을 제2유압실린더(13,14)에 공급하여 구동속도를 가속시키는 압력보상용 오리피스(18,20)와, 제2유압실린더(13,14)에 제공된 작동유가 역류하는 것을 방지하는 역류방지용 체크밸브(19,21)가 설치되어 있다.As shown in FIGS. 3 to 5, the hydraulic circuit of the vehicle maintenance lift is connected to the hydraulic pump 11 driven by the motor 10 and the discharge flow path of the hydraulic pump 11 in parallel. A first hydraulic cylinder 12 for elevating a platform (not shown) on which a municipal vehicle is mounted and a pair of second hydraulic cylinders 13, 14 for driving a jack (not shown) foldably mounted on the platform. ), A valve block 22 provided between the hydraulic pump 11, the first hydraulic cylinder 12, and the pair of second hydraulic cylinders 13 and 14, and a working oil flow path formed in the valve block 22. And first and second switching valves 15, 16, and 17 installed in the valve block 22. The valve block 22 is drilled into a single piece therein so as to communicate with the discharge flow path of the hydraulic pump 11. The hydraulic oil inflow path 23 through which the hydraulic oil discharged from the pump 11 flows and communicates with the hydraulic oil inflow path 23 in parallel to the upper portion of the hydraulic oil inflow path 23. A communication passage 27 drilled so as to independently communicate the hydraulic oil discharge passages 24, 25, 26 and the hydraulic oil discharge passages 24, 25, 26 with respect to the hydraulic oil inlet passage 23. 28 and 29. The first switching valve 15 has a hydraulic oil discharge passage 24 corresponding to the first hydraulic cylinder 12 of the valve block 22, more specifically, a communication passage 27 and The hydraulic oil discharge passage 24 is provided at a portion adjacent to the outside of the valve block 22 communicating with each other. The first switching valve 15 is switched upon application of an electrical signal to control the flow of hydraulic oil supplied to the first hydraulic cylinder 12. The pair of second switching valves 16 and 17 are connected to each other. The outside of the valve block in which the hydraulic oil discharge passages 25 and 26 corresponding to the second hydraulic cylinders 13 and 14, more specifically, the communication passages 28 and 29 and the hydraulic oil discharge passages 25 and 26 communicate with each other. Is installed in the adjacent part of the The second switching valves 16 and 17 also switch when an electrical signal is applied to control the flow of hydraulic oil supplied to the second hydraulic cylinders 13 and 14, respectively. A pair of second switching valves 16, On the inlet side of 17), pressure compensation orifices 18 and 20 for supplying the extra working pressure discharged from the hydraulic pump 11 to the second hydraulic cylinders 13 and 14 to accelerate the driving speed, and the second hydraulic cylinder Back flow prevention check valves 19 and 21 are provided to prevent the back flow of the hydraulic oil provided in (13, 14).
한편, 미 설명부호 30은 유압펌프(11)의 토출유로에 설치되어 설정된 압력이상의 작동유를 유압탱크(T)로 드레인시켜 유압회로 및 그 부품을 보호하는 릴리프밸브, 31은 리프트의 하강시 제1유압실린더(12)로부터 유압탱크(T)로 드레인되는 작동유의 귀환속도를 제어하는 릴리프밸브, 32는 전기적 신호 인가시 절환되어 제1,2유압실린더(12,13,14)로부터의 작동유를 유압탱크(T)로 드레인시키는 리턴용 솔레노이드밸브이다.On the other hand, reference numeral 30 is a relief valve installed in the discharge flow path of the hydraulic pump 11 to drain the hydraulic fluid above the set pressure to the hydraulic tank (T) to protect the hydraulic circuit and its components, 31 is the first when the lift descends Relief valve for controlling the return speed of the hydraulic oil drained from the hydraulic cylinder 12 to the hydraulic tank (T), 32 is switched when the electrical signal is applied to hydraulic oil from the first and second hydraulic cylinders (12, 13, 14) It is a return solenoid valve to drain to the tank (T).
이하에서, 본 발명의 실시예에 의한 자동차정비용 리프트의 유압회로의 작동을 첨부도면을 참조하여 상세하게 설명한다.Hereinafter, the operation of the hydraulic circuit of the vehicle maintenance lift according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
도 3에 도시된 바와 같이, 전술한 모터(10) 구동시 유압펌프(11)의 구동으로인해 유압탱크(T)로 부터 토출되는 작동유 일부가 밸브블럭(22)을 경유하여 유압펌프(11)의 토출유로에 대해 병렬로 연통되도록 연결되는 제1유압실린더(12)에 공급되므로 정비를 필요로 하는 차량이 탑재되는 4주식(또는 시저스 타입) 등의 승강장을 리프팅시키며, 이와 동시에 유압펌프(11)로부터 토출되는 작동유가 전술한 밸브블럭(22)을 경유하여 한 쌍의 제2유압실린더(13,14)에 각각 공급되어 승강장에 절첩가능하게 장착된 2단 잭을 구동시킴에 따라 차량의 타이어 또는 휠얼라인먼트를 점검 또는 수리작업을 할 수 있게 된다.As shown in FIG. 3, a part of the hydraulic oil discharged from the hydraulic tank T due to the driving of the hydraulic pump 11 when the motor 10 is driven as described above is connected to the hydraulic pump 11 via the valve block 22. It is supplied to the first hydraulic cylinder 12 connected in parallel to the discharge flow path of the discharge passage so that the lifting station, such as four stocks (or Caesars type), on which the vehicle requiring maintenance is mounted, and at the same time, the hydraulic pump 11 The hydraulic oil discharged from the vehicle is supplied to the pair of second hydraulic cylinders 13 and 14 via the above-described valve block 22 to drive a two-stage jack foldably mounted on the platform. Alternatively, the wheel alignment can be checked or repaired.
이를 상세하게 설명하면, 전술한 유압펌프(11)의 토출유로와 연통되도록 밸브블럭(22)에 형성된 작동유유입로(23)에 대해 연통로(27)에 의해 병렬로 연통되도록 천공된 작동유배출로(24)에 설치된 제1절환밸브(15)의 밸브스프링(15a)의 대향측에 전기적 신호를 인가시켜 도면상, 하측방향으로 절환시킴에 따라, 전술한 유압펌프(11)로 부터 토출되는 작동유는 위치절환된 제1절환밸브(15)를 경유하여 제1유압실린더(12)에 공급되어 승강장을 리프팅시키는 것이다.In detail, the hydraulic oil discharge passage drilled in parallel to the hydraulic oil inlet passage 23 formed in the valve block 22 so as to communicate with the discharge passage of the hydraulic pump 11 described above is communicated in parallel by the communication passage 27. The hydraulic oil discharged from the above-mentioned hydraulic pump 11 by applying an electrical signal to the opposite side of the valve spring 15a of the 1st switching valve 15 provided in (24), and switching it to the downward direction in drawing. Is supplied to the first hydraulic cylinder 12 via the position-switched first switching valve 15 to lift the platform.
이때, 전술한 제1절환밸브(15)에 인가되는 전기적 신호가 차단되는 경우, 밸브스프링(15a)의 탄성력에 의해 제1절환밸브(15)는 초기위치로 복원됨에 따라(도 3에 도시된 상태임), 체크밸브(15b)에 의해 유압펌프(11)와 제1유압실린더(12)를 연결하는 유로가 차단되어 전술한 유압펌프(11)로부터 토출되는 작동유가 제1유압실린더(12)에 공급되는 것이 차단되므로 제1유압실린더(12)의 구동이 정지되어 승강장을 소정높이로서 리프팅시킨 상태로 유지할 수 있는 것이다.At this time, when the above-described electrical signal applied to the first switching valve 15 is cut off, the first switching valve 15 is restored to the initial position by the elastic force of the valve spring (15a) as shown in FIG. State), the flow path connecting the hydraulic pump 11 and the first hydraulic cylinder 12 is blocked by the check valve 15b so that the hydraulic oil discharged from the hydraulic pump 11 described above is the first hydraulic cylinder 12. Since the supply to the vehicle is blocked, the driving of the first hydraulic cylinder 12 is stopped to maintain the platform at a predetermined height.
한편, 전술한 밸브블럭(22)의 작동유유입로(23)에 대해 연통로(28,29)에 의해 병렬로 연통되는 작동유배출로(25,26)에 각각 설치된 한 쌍의 제2절환밸브 (16,17)의 밸브스프링(16a,17a)의 대향측에 전기적 신호를 인가시켜 도면상, 하측방향으로 절환시킴에 따라, 전술한 유압펌프(11)로부터 토출되는 작동유는 위치절환된 제2절환밸브(16,17)를 경유하여 한 쌍의 제2유압실린더(13,14)에 각각 공급되어 승강장에 장착되는 2단 잭을 구동시키는 것이다.On the other hand, a pair of second switching valves respectively provided in the hydraulic oil discharge passage (25, 26) communicated in parallel by the communication passage (28, 29) with respect to the hydraulic oil inlet passage (23) of the valve block 22 described above ( As the electric signal is applied to the opposite sides of the valve springs 16a and 17a of the 16 and 17 to be switched downward in the drawing, the hydraulic oil discharged from the hydraulic pump 11 described above is switched to the second position switched. The two-stage jacks are supplied to the pair of second hydraulic cylinders 13 and 14 via the valves 16 and 17, respectively, and are mounted on the platform.
이때, 전술한 유압펌프(11)로부터 토출되는 작동유가 밸브블럭(22) 내부에 형성된 유로에 설치된 제1,2절환밸브(15,16,17)를 경유하여 제1,2유압실린더 (12,13,14)에 공급되어 구동시키는 경우, 전술한 제2절환밸브(16,17)의 입구측 유로에 설치된 오리피스(18,20)에 의해 유압펌프(11)로부터 토출되는 작동유중 여분의 작동압이 제1,2유압실린더(12,13,14)에 공급되어 이의 구동속도를 가속시킴에 따라 작업성을 향상시킬 수 있는 것이다.At this time, the hydraulic fluid discharged from the above-described hydraulic pump 11 passes through the first and second switching valves 15, 16 and 17 installed in the flow path formed inside the valve block 22. In the case of supplying and driving to 13 and 14, the extra working pressure in the hydraulic oil discharged from the hydraulic pump 11 by the orifices 18 and 20 provided in the inlet-side flow paths of the second switching valves 16 and 17 described above. It is supplied to the first and second hydraulic cylinders 12, 13 and 14 to accelerate the driving speed thereof, thereby improving workability.
또한, 전술한 유압펌프(11)로 부터 토출되어 제1,2유압실린더(12,13,14)에 공급되는 작동유의 흐름방향을 제어할 수 있도록 하는 제1,2절환밸브(15,16,17)를 사용함에 따라, 유압펌프(11)와 이의 토출유로에 대해 병렬연결되는 제1,2유압실린더(12,13,14) 사이에 설치되는 밸브블럭(22) 내부에 형성되는 유로를 극히 단순화시키며, 이로 인해 밸브블럭(22)의 가공비를 대폭적으로 경감시킬 수 있게 된다.In addition, the first and second switching valves 15, 16, which discharge from the above-described hydraulic pump 11 to control the flow direction of the hydraulic oil supplied to the first and second hydraulic cylinders (12, 13, 14) 17), the flow path formed inside the valve block 22 installed between the hydraulic pump 11 and the first and second hydraulic cylinders 12, 13 and 14 connected in parallel to the discharge flow path thereof is extremely small. This simplifies, thereby significantly reducing the processing cost of the valve block 22.
즉, 전술한 유압펌프(11)로부터 토출되는 작동유가 유입되는 작동유유입로 (23)를 밸브블럭(22) 일측에 한군데 천공하고, 전술한 제1,2절환밸브(15,16,17)가 설치되는 작동유배출로(24,25,26)를 밸브블럭(22)에 관통되도록 천공하되, 작동유 배출로(24,25,26)는 연통로(27,28,29)를 통하여 작동유유입로(23)에 대해 연통되도록 천공작업함에 따라, 전술한 작동유유입로(23)에 대해 작동유배출로(24,25,26)를 연통시키도록 연통로(27,28,29)를 천공후 이를 폐쇄시키는 작업이 불필요하게 된다.That is, the hydraulic oil inflow path 23 through which the hydraulic oil discharged from the hydraulic pump 11 is introduced is drilled into one side of the valve block 22, and the first and second switching valves 15, 16, and 17 are Drill the installed hydraulic oil discharge passage (24, 25, 26) so as to pass through the valve block 22, the hydraulic oil discharge passage (24, 25, 26) through the communication passage (27, 28, 29) As a result of the drilling operation so as to communicate with 23), the communication passages 27, 28, and 29 are drilled to close the communication passages 27, 28, and 29 so as to communicate the hydraulic oil discharge passages 24, 25, and 26 with respect to the above-described hydraulic flow passages 23. The work becomes unnecessary.
한편, 차량의 점검 또는 수리작업이 완료되어 리프트를 하강시키기 위해서는, 전술한 제1,2절환밸브(15,16,17)에 전기적 신호를 인가시켜 도면상, 하측방향으로 절환시킴에 따라, 승강장에 탑재된 차량의 자중에 의해 2단 잭 구동용 제2유압실린더(13,14) 및 제1유압실린더(12)로부터 드레인되는 작동유는 위치절환된 제1,2절환밸브(15,16,17)를 경유하여 리턴용 솔레노이드밸브(32) 및 오리피스(31)를 경유하여 유압탱크(T) 측으로 귀환되는 것이다.On the other hand, in order to lower the lift after the inspection or repair work of the vehicle is completed, an electric signal is applied to the above-described first and second switching valves 15, 16, and 17 to switch downward in the drawing. The hydraulic oil drained from the second hydraulic cylinders 13 and 14 and the first hydraulic cylinder 12 for driving the two-stage jack by the weight of the vehicle mounted on the first and second switching valves 15, 16 and 17 is switched. It is to be returned to the hydraulic tank (T) side via the return solenoid valve 32 and the orifice 31 via the).
이상에서와 같이, 바람직한 실시예에 의하면 아래와 같은 이점을 갖는다.As mentioned above, according to a preferable embodiment, it has the following advantages.
차량을 점검 또는 수리시 사용되는 리프트의 유압실린더에 대해 작동유 공급을 제어하는 밸브블럭 내부에 형성되는 유로를 단순화하여, 해당 유압부품의 장착개소를 줄임에 따라 이물질 증착으로 인해 작동불량 발생되는 것을 방지함에 따라 신뢰도를 향상시킬 수 있다.Simplifies the flow path formed inside the valve block that controls the hydraulic oil supply to the hydraulic cylinder of the lift used when inspecting or repairing the vehicle, and prevents malfunction due to foreign material deposition by reducing the mounting location of the hydraulic component. As a result, reliability can be improved.
또한, 밸브블럭의 단일화로 인해 가공비를 줄이고 원가비용을 절감하여 당해 분야에서 가격경쟁력을 갖게 된다.In addition, due to the unification of the valve block to reduce the processing cost and cost cost will have a price competitiveness in the field.
또한, 밸브블럭에 형성되는 유로를 병렬로 연통시키도록 천공된 구멍을 연통시킨후 폐쇄하는 작업이 불필요하여 밸브블럭의 가공공정을 단축할 수 있다.In addition, it is not necessary to make a closing operation after communicating the perforated holes so that the flow paths formed in the valve block communicate in parallel, thereby shortening the processing of the valve block.
또한, 작동유의 흐름방향을 제어하는 유압부품을 밸브블럭에 내설하여 사후관리가 용이하고 조립시 인접 부품과의 상호 간섭되는 것을 방지할 수 있다.In addition, by installing the hydraulic parts for controlling the flow direction of the hydraulic fluid in the valve block it is easy to follow-up management and can prevent mutual interference with adjacent parts during assembly.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0030584A KR100397795B1 (en) | 2001-05-31 | 2001-05-31 | hydraulic circuit for motor car repair lift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0030584A KR100397795B1 (en) | 2001-05-31 | 2001-05-31 | hydraulic circuit for motor car repair lift |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2020010017791U Division KR200248446Y1 (en) | 2001-06-14 | 2001-06-14 | hydraulic circuit for motor car repair lift |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20010070715A KR20010070715A (en) | 2001-07-27 |
| KR100397795B1 true KR100397795B1 (en) | 2003-09-19 |
Family
ID=19710244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR10-2001-0030584A KR100397795B1 (en) | 2001-05-31 | 2001-05-31 | hydraulic circuit for motor car repair lift |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100397795B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100731774B1 (en) * | 2006-06-08 | 2007-06-22 | 주식회사 유니팩시스템 | Valve block for lift hydraulic apparatus |
| DE102016114635B4 (en) | 2016-08-08 | 2018-09-20 | Hoerbiger Automatisierungstechnik Holding Gmbh | processing machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0826683A (en) * | 1994-07-21 | 1996-01-30 | Mitsubishi Heavy Ind Ltd | Floor lifting/lowering device |
| JPH1024762A (en) * | 1996-07-09 | 1998-01-27 | Shinmeiwa Auto Eng Kk | Hydraulic control device for load receiving platform lift device |
| KR19980045535U (en) * | 1996-12-27 | 1998-09-25 | 이해규 | Hydraulics for outriggers for cranes |
| KR19990060980A (en) * | 1997-12-31 | 1999-07-26 | 추호석 | Outrigger control system |
-
2001
- 2001-05-31 KR KR10-2001-0030584A patent/KR100397795B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0826683A (en) * | 1994-07-21 | 1996-01-30 | Mitsubishi Heavy Ind Ltd | Floor lifting/lowering device |
| JPH1024762A (en) * | 1996-07-09 | 1998-01-27 | Shinmeiwa Auto Eng Kk | Hydraulic control device for load receiving platform lift device |
| KR19980045535U (en) * | 1996-12-27 | 1998-09-25 | 이해규 | Hydraulics for outriggers for cranes |
| KR19990060980A (en) * | 1997-12-31 | 1999-07-26 | 추호석 | Outrigger control system |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010070715A (en) | 2001-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100753990B1 (en) | Hydraulic circuit for traveling straight | |
| KR20050081057A (en) | Relief valve | |
| KR100621983B1 (en) | variable regeneration valve of heavy equipment | |
| KR20050106233A (en) | Hydraulic control valve having holding valve with improved response characteristics | |
| KR100518768B1 (en) | control device of hydraulic valve for load holding | |
| KR100397795B1 (en) | hydraulic circuit for motor car repair lift | |
| KR200248446Y1 (en) | hydraulic circuit for motor car repair lift | |
| KR100240092B1 (en) | A locking device of operating apparatus for construction heavy equipment | |
| KR100876980B1 (en) | hydraulic circuit of having boom float position | |
| KR101506744B1 (en) | Hydraulic oil regeneration valve assembly for construction machinery | |
| KR100652871B1 (en) | Flow control apparatus for heavy equipment | |
| KR101053175B1 (en) | Hydraulic system of control valve for energy saving 3 pump control | |
| KR20080060512A (en) | Hydraulic system of forklift truck | |
| KR20030052031A (en) | control apparatus of hydraulic valve for construction heavy equipment | |
| KR100516473B1 (en) | Control valve for hydraulic system in forklift truck | |
| US20120222916A1 (en) | Hydraulic Vehicle Lift System | |
| JP4838490B2 (en) | Control valve device | |
| KR100798038B1 (en) | Hydraulic system for preventing free fall mast in forklift truck | |
| KR100621977B1 (en) | hydraulic circuit of having float function | |
| KR200182919Y1 (en) | Hydraulic system | |
| CN219013030U (en) | High-altitude operation car switching cartridge valve group | |
| KR20050081056A (en) | Pilot poppet type relief valve | |
| KR100621973B1 (en) | hydraulic apparatus for construction heavy equipment | |
| KR20040087180A (en) | hydraulic circuit of protect boom lift for track | |
| KR200334867Y1 (en) | Hydraulic apparatus for emergency stop device in elevator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| G15R | Request for early opening | ||
| N231 | Notification of change of applicant | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20120820 Year of fee payment: 10 |
|
| FPAY | Annual fee payment |
Payment date: 20130822 Year of fee payment: 11 |
|
| FPAY | Annual fee payment |
Payment date: 20150825 Year of fee payment: 13 |
|
| FPAY | Annual fee payment |
Payment date: 20160825 Year of fee payment: 14 |
|
| FPAY | Annual fee payment |
Payment date: 20170825 Year of fee payment: 15 |