KR20040103228A - Hydrostatic transmission using flux discharged from a pump - Google Patents

Hydrostatic transmission using flux discharged from a pump Download PDF

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Publication number
KR20040103228A
KR20040103228A KR1020030035165A KR20030035165A KR20040103228A KR 20040103228 A KR20040103228 A KR 20040103228A KR 1020030035165 A KR1020030035165 A KR 1020030035165A KR 20030035165 A KR20030035165 A KR 20030035165A KR 20040103228 A KR20040103228 A KR 20040103228A
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South Korea
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hst
pump
flow rate
flow
hydrostatic transmission
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KR1020030035165A
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Korean (ko)
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KR100497662B1 (en
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남상일
강영선
김태영
곽희성
김대철
한종규
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동양물산기업 주식회사
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Publication of KR20040103228A publication Critical patent/KR20040103228A/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K3/00—Baths; Douches; Appurtenances therefor
    • A47K3/28—Showers or bathing douches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J47/00—Ion-exchange processes in general; Apparatus therefor
    • B01J47/014—Ion-exchange processes in general; Apparatus therefor in which the adsorbent properties of the ion-exchanger are involved, e.g. recovery of proteins or other high-molecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
    • B01J49/75—Regeneration or reactivation of ion-exchangers; Apparatus therefor of water softeners
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents

Abstract

PURPOSE: A hydrostatic transmission using flow discharged from a same pump is provided to use flow from the main pump for driving the hydrostatic transmission pump, and to operate the PTO(power take-off) clutch with part of flow by integrally connecting the PTO clutch with the hydrostatic transmission. CONSTITUTION: A main pump(2) drives by receiving power from an engine, and an integrated hydrostatic transmission(50) inputs flow from the main pump. The hydrostatic transmission is composed of a selection valve(53) selectively controlling the passage to stream flow from the main pump through an oil filter(51) to a PTO clutch cylinder(52), a pilot line(54a) of a third relief valve(54) regulating hydraulic pressure by switching the passage with the selection valve in filling flow, a fourth relief valve(55) inputting flow drained from the third relief valve with hydraulic pressure applied to the pilot line, a hydrostatic transmission pump(56) operating the hydrostatic transmission by inputting flow according to hydraulic pressure of a pilot line(55a), and a hydrostatic transmission motor(57).

Description

동일한 펌프로부터 토출된 유량을 사용하는 정유압 트랜스미션{Hydrostatic transmission using flux discharged from a pump}Hydrostatic transmission using flux discharged from a pump

본 발명은 동일한 펌프로부터 토출된 유량을 사용하는 HST에 연결되는 유압장치에 관한 것으로서, 보다 자세하게는 PTO(Power Take-Off) 클러치 유압회로를 포함하는 HST(Hydro Static Transmission)에 관한 것이다.The present invention relates to a hydraulic apparatus connected to an HST using a flow rate discharged from the same pump, and more particularly, to a hydrostatic transmission (HST) including a power take-off (PTO) clutch hydraulic circuit.

일반적으로, 전지형 주행차(All Terrain Vehicle : 이하, "AVT"라함)인 버스, 트럭, 각종 건설기계, 혹은 각종 산업기계 등에 유압기계식 변속기(Hydro Mechanical Transmission : 이하, "HMT"라 함)로 불리는 무단변속기가 이용되고 있다. 이 HMT는 작동유의 정압 에너지를 이용하는 정유압식 변속기(Hydro Static Transmission : 이하, "HST"라 함)와, 기계식 변속기(Mechanical Transmission : 이하, "MT"라 함)를 유성치차 기구 등의 차동 치차 기구를 개재하고 조합시키도록 한 것으로, 차동치차 기구에서 HST 입력과 MT 입력을 합성함으로써, 무단계로 연속된 변속을 행하는 구성으로 되어 있다.Generally, a hydraulic mechanical transmission (hereinafter referred to as "HMT") may be used for an all-terrain vehicle (hereinafter referred to as "AVT") such as a bus, a truck, various construction machines, or various industrial machines. A continuously variable transmission called "used" is used. The HMT uses a differential hydraulic mechanism such as a planetary gear mechanism such as a hydrostatic transmission (hereinafter referred to as "HST") and a mechanical transmission (hereinafter referred to as "MT") that utilizes static pressure energy of hydraulic fluid. By combining the HST input and the MT input in the differential gear mechanism, a continuous shift is carried out steplessly.

상기 HST는 작동유를 매개로 하는 정유압 동력전달장치인데, 펌프와 모터 사이의 폐회로 상에서 작동유에 의해 에너지가 변환된다. 동력원의 회전동력을 펌프를 통하여 압력에너지로 변환하고, 이를 다시 모터에서 회전동력으로 변환시킨다. 펌프와 모터는 가변용량형 사판식 피스톤 펌프와 고정용량형 사판식 피스톤 모터(PV-MF)가 주로 사용된다. 가변형 펌프의 사판각(또는 경전각)을 조절함으로써 펌프의 토출량을 변화시켜 유압 모터의 출력속도를 제어할 수 있으며, 오일의 유동방향을 바꾸어서 전진과 후진이 이루어지도록 구성되어 있다.The HST is a hydrostatic power transmission device that uses hydraulic oil as a medium, and energy is converted by the hydraulic oil on a closed circuit between the pump and the motor. The rotational power of the power source is converted into pressure energy through the pump, which is then converted into rotational power in the motor. Pumps and motors are mainly used for variable displacement swash plate piston pumps and fixed displacement swash plate piston motors (PV-MF). By adjusting the swash plate angle (or tilt angle) of the variable pump, it is possible to control the output speed of the hydraulic motor by changing the discharge amount of the pump, and it is configured to move forward and backward by changing the flow direction of the oil.

보통 트랙터에 사용되는 HST는 모터와 펌프가 붙어있는 일체형으로서, 밸브플레이트에 펌프와 모터 사이의 유로를 형성한다.HST, which is usually used in tractors, is an integral type with a motor and a pump, and forms a flow path between the pump and the motor in the valve plate.

트랙터용 일체형 HST는 펌프와 모터가 상하로 평행하게 배열되는 U형과 펌프와 모터가 밸브플레이트를 중심으로 좌우로 배열되는 Z형 등으로 구분된다.The integrated HST for tractors is divided into a U type in which the pump and the motor are arranged in parallel up and down, and a Z type in which the pump and the motor are arranged left and right around the valve plate.

PTO(Power Take-Off)는 트랙터의 동력을 작업기에 전달하는 장치이다. 트랙터가 정지시에도 작업이 이루어질 수 있으므로 트랙터 구동과 독립적인 동력전달이 이루어져야 한다. 따라서 이를 단속할 수 있는 장치가 필요하며, 유압으로 PTO 구동을 단속하는 독립적인 PTO 클러치가 주로 사용된다.PTO (Power Take-Off) is a device that transmits the power of a tractor to a work machine. Work can be carried out even when the tractor is stopped, so power transmission must be independent of the tractor drive. Therefore, there is a need for a device capable of cracking it, and an independent PTO clutch that clamps the PTO drive by hydraulic pressure is mainly used.

도1에 도시된 바와 같이, 엔진(1)의 구동력을 받아 구동되는 메인 펌프(2)에서 토출된 유량은 상기 HST(30)와 PTO 클러치(40)로 분배된다. 즉, 상기 메인 펌프(2)에서 토출되는 유량은 제1 오일필터(31)를 거쳐 상기 HST(30)와 PTO 클러치(40)로 분기되는 바, 상기 HST(30)로 분기된 유량은 다시 제2 오일필터(31a)를 거쳐 제1 릴리프 밸브(32)에 의해 저압이 유지된다. 상기 제1 릴리프 밸브(32)에 의해 조정된 일부 유량은 작동하지 않는 HST 펌프(33)나 HST 모터(34)로 흡입된다.As shown in FIG. 1, the flow rate discharged from the main pump 2 driven by the driving force of the engine 1 is distributed to the HST 30 and the PTO clutch 40. That is, the flow rate discharged from the main pump 2 is branched to the HST 30 and the PTO clutch 40 through the first oil filter 31, and the flow rate branched to the HST 30 is again made. The low pressure is maintained by the first relief valve 32 via the two oil filters 31a. Some of the flow rates adjusted by the first relief valve 32 are sucked into the HST pump 33 or the HST motor 34 which are not operated.

또한, 엔진(1)의 구동력을 받아 구동되는 메인 펌프(2)에서 토출되는 유량의 일부는 상기 PTO 클러치(40)로 유입된다. 유입되는 유량은 선택 밸브(41)에 의해 유로가 결정되어 PTO 클러치 실린더(42)로 유입된다. 이 PTO 클러치 실린더(42)의 체적(Control volume)이 채워지면, 제2 릴리프 밸브(43)는 유압이 상승시키고 잔여 유량이 드레인된다.In addition, a part of the flow rate discharged from the main pump 2 driven by the driving force of the engine 1 flows into the PTO clutch 40. The flow rate that flows in is determined by the selection valve 41 and flows into the PTO clutch cylinder 42. When the volume (Control volume) of this PTO clutch cylinder 42 is filled, the 2nd relief valve 43 raises hydraulic pressure and the remaining flow volume will drain.

이와 같이 구성된 종래의 트랙터의 HST와 PTO는 동일한 메인 펌프(2)에서 토출된 유량이 상기 HST(30)와 PTO 클러치(40)로 분배되어 유량이 흐르게 되는 바, 상기 HST(30)는 도2에 도시된 바와 같이, 상기 HST(30)는 메인 펌프(2)의 유량을전부 사용하지 않고 일부(80%만 사용하고 나머지 유량(20%)은 PTO 클러치(40)에 사용된다. 즉, HST(30)와 PTO 클러치(40)가 별도로 동작하기 때문에 HST(30)의 동작시 전체 유량의 80%만 사용하게 되어 20%의 유량 손실이 생기게 되고, 이러한 유량 손실은 효율적인 HST 시스템을 구성하는데 문제점이 있었다.In the conventional tractor HST and PTO configured as described above, the flow rate discharged from the same main pump 2 is distributed to the HST 30 and the PTO clutch 40 so that the flow rate flows, and the HST 30 is shown in FIG. 2. As shown in the above, the HST 30 uses only part (80%) of the main pump 2 without using the entire flow rate and the remaining flow rate (20%) is used for the PTO clutch 40. That is, the HST Since the 30 and the PTO clutch 40 operate separately, only 80% of the total flow rate is used during the operation of the HST 30, resulting in a 20% flow loss, which is a problem in constructing an efficient HST system. There was this.

또한, 종래의 HST(30)와 PTO 클러치(40)는 독립적으로 구성되어 있으며, PTO 클러치(40)는 트랜스액슬 내부에 부착되어 있다. 따라서 PTO 클러치(40) 유로를 형성하기 위하여 별도의 배관이 필요하며, 이러한 배관 때문에 트랜스액슬의 유지 보수가 어려운 단점이 있다.In addition, the conventional HST 30 and the PTO clutch 40 are configured independently, and the PTO clutch 40 is attached inside the transaxle. Therefore, separate piping is required to form the PTO clutch 40 flow path, and there is a disadvantage in that maintenance of the transaxle is difficult due to such piping.

따라서, 본 발명의 일 목적은 PTO 클러치 유로를 HST 밸브플레이트에 형성하는 동일한 펌프로부터 토출된 유량을 사용하는 정유압 트랜스미션을 제공하는 것이다.Accordingly, one object of the present invention is to provide a hydrostatic transmission using the flow rate discharged from the same pump which forms the PTO clutch flow path in the HST valve plate.

본 발명의 다른 목적은 구조가 간단하고 제작비용이 저렴하도록 한 동일한 펌프로부터 토출된 유량을 사용하는 정유압 트랜스미션을 제공하는 것이다.Another object of the present invention is to provide a hydrostatic transmission using the flow rate discharged from the same pump, which makes the structure simple and inexpensive to manufacture.

따라서, 상기와 같은 목적을 달성하기 위하여 이루어진 본 발명에 의한 동일한 펌프로부터 토출된 유량을 사용하는 정유압 트랜스미션은, 엔진을 동력을 전달받아 구동되는 메인 펌프와, 상기 메인 펌프에서 토출된 유량이 유입되는 일체형 HST를 포함하고, 상기 일체형 HST는 상기 메인 펌프에서 토출된 유량이 오일 필터를 거쳐 PTO 클러치 실린더 내로 흐르도록 그 유로를 선택 제어하는 선택 밸브와, 상기 PTO 클러치 실린더 내의 체적(Contol volume)만큼 유량이 충만되면, 상기 선택 밸브에 의해 유로가 전환되어 유압을 조정하는 제3 릴리프 밸브의 파이롯트 라인과, 상기 파이롯트 라인에 작용하는 유압에 의해 제3 릴리프 밸브에서 드레인된 유량을 유입하는 제4 릴리프 밸브와, 상기 제4 릴리프 밸브의 파이롯트 라인의 유압에 의해 조정된 일부 유량이 유입되어 일체형 HST를 작동시키는 HST 펌프로 이루어진 것을 특징으로 한다.Therefore, the hydrostatic transmission using the flow rate discharged from the same pump according to the present invention made to achieve the above object, the main pump driven by the engine is driven, and the flow rate discharged from the main pump flows in And an integral HST, wherein the integral HST includes a selection valve for selectively controlling the flow path so that the flow rate discharged from the main pump flows through the oil filter into the PTO clutch cylinder, and a volume in the PTO clutch cylinder. When the flow rate is filled, the flow path is switched by the selector valve, and the pilot line of the third relief valve for adjusting the hydraulic pressure and the fourth relief for introducing the flow rate drained from the third relief valve by the hydraulic pressure acting on the pilot line. Some flow rate adjusted by the hydraulic pressure of the valve and the pilot line of the fourth relief valve It is characterized by consisting of a HST pump for operating the integrated HST.

도1은 종래의 HST와 PTO 클러치의 회로도,1 is a circuit diagram of a conventional HST and PTO clutch;

도2는 종래의 HST와 PTO 클러치에 흐르는 유량의 변화를 도시한 그래프,2 is a graph showing a change in flow rate flowing in the conventional HST and PTO clutches;

도3은 본 발명에 의한 일체형 HST의 회로도,3 is a circuit diagram of an integrated HST according to the present invention;

도4는 본 발명에 의한 PTO 클러치 일체형 HST에 흐르는 유량의 변화를 도시한 그래프이다.4 is a graph showing a change in flow rate flowing through the PTO clutch integrated HST according to the present invention.

<도면의 주요 부호에 대한 설명><Description of Major Symbols in Drawing>

1 : 엔진 2 : 메인 펌프1: engine 2: main pump

50 : 일체형 HST 52 : PTO 클러치 실린더50: integrated HST 52: PTO clutch cylinder

53 : 선택 밸브 54 : 제3 릴리프 밸브53: selector valve 54: third relief valve

55 : 제4 릴리프 밸브 56 : HST 펌프55: fourth relief valve 56: HST pump

57 : HST 모터57: HST Motor

이하, 본 발명을 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings the present invention will be described in detail.

도3은 본 발명에 의한 일체형 HST의 회로도이고, 도4는 본 발명에 의한 PTO 클러치 일체형 HST에 흐르는 유량의 변화를 도시한 그래프이다.3 is a circuit diagram of an integrated HST according to the present invention, and FIG. 4 is a graph showing a change in flow rate flowing through the PTO integrated clutch HST according to the present invention.

도3 및 도4에 도시된 바와 같이, 본 발명에 의한 동일한 펌프로부터 토출된 유량을 사용하는 HST는, 엔진의 동력을 전달받아 구동되는 메인 펌프(2)와, 상기 메인 펌프(2)에서 토출된 유량이 유입되는 일체형 HST(50)를 포함하고, 상기 일체형 HST(50)는 상기 메인 펌프(2)에서 토출된 유량이 오일 필터(51)를 거쳐 선택밸브(53)와 제3 릴리프 밸브(54)로 유입되고, 상기 제3 릴리프 밸브(54)의 설정압력 이상의 유량은 제3 릴리프 밸브(54)에서 제4 릴리프 밸브(55)로 흡입된다. 상기 제3 릴리프 밸브(54)의 설정압력이 제4 릴리프 밸브(56) 설정압력보다 항상 높기 때문에 유량이 상기 제3 릴리프 밸브(54)에서 제4 릴리프 밸브(55)로 흐르게 된다. PTO 클러치(52)를 동작을 위해 선택밸브(53)를 선택하면 상기 메인 펌프(2)에서 토출된 유량의 일부가 PTO 클러치 실린더(52) 내로 흐르도록 그 유로를 선택하게 된다. 상기 PTO 클러치 실린더(52) 내의 체적(Contol volume)만큼 유량이 충만되면,상기 제3 릴리프 밸브(54)에 의해 PTO 클러치 실린더(52)에 충만한 유량외 잔여유량은 제4 릴리프 밸브(55)로 흐르게 된다. 제4 릴리프 밸브(55)에 유입된 유량은 메인 펌프(2)의 토출유량 전부가 되고, 상기 유입된 유량은 HST 펌프(56)와 모터(57)에 유입되어 동력전달에 사용하게 된다.3 and 4, the HST using the flow rate discharged from the same pump according to the present invention is discharged from the main pump 2 and the main pump 2 which are driven by the power of the engine. And an integrated HST 50 into which the flow rate is introduced, wherein the flow rate discharged from the main pump 2 passes through the oil filter 51 to the selection valve 53 and the third relief valve ( 54 flows in, and the flow rate equal to or greater than the set pressure of the third relief valve 54 is sucked from the third relief valve 54 to the fourth relief valve 55. Since the set pressure of the third relief valve 54 is always higher than the set pressure of the fourth relief valve 56, the flow rate flows from the third relief valve 54 to the fourth relief valve 55. When the selection valve 53 is selected to operate the PTO clutch 52, the flow path is selected so that a part of the flow rate discharged from the main pump 2 flows into the PTO clutch cylinder 52. When the flow rate is filled by the volume (Contol volume) in the PTO clutch cylinder 52, the remaining flow rate other than the flow rate filled to the PTO clutch cylinder 52 by the third relief valve 54 is transferred to the fourth relief valve 55 Will flow. The flow rate flowing into the fourth relief valve 55 becomes the discharge flow rate of the main pump 2, and the flow rate flows into the HST pump 56 and the motor 57 to be used for power transmission.

이와 같이 구성된 본 발명에 의한 동일한 펌프로부터 토출된 유량을 사용하는 HST는, 상기 선택 밸브(53)가 동작하지 않으면, 메인 펌프(2)에서 토출되는 유량은 제4 릴리프 밸브(55)로 유입되는 유량과 동일한 바, 메인 펌프(2)에서 발생된 유량이 도4에 도시된 그래프와 같이 100% HST 펌프(56)를 구동하는 데 사용되어 유량 손실이 없으며, 순간적으로 PTO 클러치 작동 스위치(도시안됨)를 작동시키면, 메인 펌프(2)에서 토출되는 유량 중 20% 정도는 PTO 클러치 실린더(52)에 채워져 작업기를 구동하는 데 사용하게 된다.In the HST using the flow rate discharged from the same pump according to the present invention configured as described above, if the selection valve 53 does not operate, the flow rate discharged from the main pump 2 flows into the fourth relief valve 55. As the flow rate, the flow rate generated in the main pump 2 is used to drive the 100% HST pump 56 as shown in the graph shown in FIG. ), About 20% of the flow rate discharged from the main pump 2 is filled in the PTO clutch cylinder 52 to be used to drive the work machine.

그리고, 상기 선택 밸브(53)가 동작을 지속하게 되면, 상기 PTO 클러치 실린더(52)에 유량이 채워지는 데, PTO 클러치 실린더(52)의 체적(Control volume) 만큼 채워지면 유량은 상기 제3 릴리프 밸브(54)를 통해 제4 릴리프 밸브(55)로 드레인되므로, 메인 펌프(2)에서 토출된 유량과 제4 릴리프 밸브(55)로 유입되는 유량이 동일하게 된다.When the selection valve 53 continues to operate, the flow rate is filled in the PTO clutch cylinder 52. When the volume is filled by the control volume of the PTO clutch cylinder 52, the flow rate is the third relief. Since it is drained to the fourth relief valve 55 through the valve 54, the flow rate discharged from the main pump 2 and the flow rate flowing into the fourth relief valve 55 are the same.

상기한 바와 같이, 본 발명에 따른 동일한 펌프로부터 토출된 유량을 사용하는 정유압 트랜스미션에 의하면, 메인 펌프에서 토출되는 유량을 HST 펌프를 구동하는 데 전부 사용하고, PTO 클러치에 연결된 작업기 작동시에는 유량의 일부를PTO 클러치의 작동에 사용하도록 PTO 클러치와 HST를 일체형이 되도록 회로를 구성함으로써, 종래 PTO 클러치와 HST로 분기되어 HST와 PTO 클러치가 독립적으로 작동됨으로써 메인 펌프에서 발생되는 유량이 분기되어, PTO 클러치로 유입되는 유량만큼은 HST에서 사용할 수 없었고, 상기 HST와 PTO 클러치 일체형 HST는 이 점을 개선하였다.As described above, according to the hydrostatic transmission using the flow rate discharged from the same pump according to the present invention, all of the flow rate discharged from the main pump is used to drive the HST pump, and when the work machine connected to the PTO clutch is operated, By constructing a circuit so that the PTO clutch and the HST are integrated to use a part of the PTO clutch for operation, the flow rate generated by the main pump is branched by branching into the conventional PTO clutch and the HST and operating the HST and the PTO clutch independently. The flow rate flowing into the PTO clutch could not be used in the HST, and the HST and the PTO integrated clutch HST improved this point.

Claims (1)

엔진을 동력을 전달받아 구동되는 메인 펌프(2)와, 상기 메인 펌프(2)에서 토출된 유량이 유입되는 일체형 HST(50)를 포함하고,It includes a main pump (2) that is driven by the engine driven by power, and an integrated HST (50) to which the flow rate discharged from the main pump (2) flows, 상기 일체형 HST(50)는 상기 메인 펌프(2)에서 토출된 유량이 오일 필터(51)를 거쳐 PTO 클러치 실린더(52) 내로 흐르도록 그 유로를 선택 제어하는 선택 밸브(53)와, 상기 PTO 클러치 실린더(52) 내의 체적(Contol volume)만큼 유량이 충만되면, 상기 선택 밸브(53)에 의해 유로가 전환되어 유압을 조정하는 제3 릴리프 밸브(54)의 파이롯트 라인(54a)과, 상기 파이롯트 라인(54a)에 작용하는 유압에 의해 제3 릴리프 밸브(54)에서 드레인된 유량을 유입하는 제4 릴리프 밸브(55)와, 상기 충전 릴리프 밸브(55)의 파이롯트 라인(55a)의 유압에 의해 조정된 일부 유량이 유입되어 일체형 HST(50)를 작동시키는 HST 펌프(56)와 HST 모터(57)로 이루어진 것을 특징으로 하는 동일한 펌프로부터 토출된 유량을 사용하는 정유압 트랜스미션.The integrated HST 50 includes a selection valve 53 for selectively controlling the flow path such that the flow rate discharged from the main pump 2 flows into the PTO clutch cylinder 52 through the oil filter 51, and the PTO clutch. When the flow rate is filled by the volume (Contol volume) in the cylinder 52, the pilot line 54a of the third relief valve 54 for adjusting the oil pressure by switching the flow path by the selection valve 53, and the pilot line Adjustment by the hydraulic pressure of the 4th relief valve 55 which flows in the flow volume drained from the 3rd relief valve 54 by the hydraulic pressure acting on 54a, and the pilot line 55a of the said filling relief valve 55 The hydrostatic transmission using the flow rate discharged from the same pump, characterized in that consisting of the HST pump 56 and the HST motor 57 to operate the integral HST (50) flows into the flow.
KR10-2003-0035165A 2003-05-31 2003-05-31 Hydrostatic transmission using flux discharged from a pump KR100497662B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160079488A (en) * 2014-12-26 2016-07-06 엘에스엠트론 주식회사 Hydraulic System of Transmission for Vehicle
KR20180050793A (en) * 2016-11-07 2018-05-16 주식회사 인팩 Hydraulic driving apparatus for vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160079488A (en) * 2014-12-26 2016-07-06 엘에스엠트론 주식회사 Hydraulic System of Transmission for Vehicle
KR20180050793A (en) * 2016-11-07 2018-05-16 주식회사 인팩 Hydraulic driving apparatus for vehicle

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