KR970010633A - Hydraulic device for driving forklift - Google Patents

Hydraulic device for driving forklift Download PDF

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Publication number
KR970010633A
KR970010633A KR1019950023612A KR19950023612A KR970010633A KR 970010633 A KR970010633 A KR 970010633A KR 1019950023612 A KR1019950023612 A KR 1019950023612A KR 19950023612 A KR19950023612 A KR 19950023612A KR 970010633 A KR970010633 A KR 970010633A
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KR
South Korea
Prior art keywords
control valve
valve
speed control
flow path
flow paths
Prior art date
Application number
KR1019950023612A
Other languages
Korean (ko)
Other versions
KR0130712B1 (en
Inventor
이승춘
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이승춘
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Publication date
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Priority to KR1019950023612A priority Critical patent/KR0130712B1/en
Publication of KR970010633A publication Critical patent/KR970010633A/en
Application granted granted Critical
Publication of KR0130712B1 publication Critical patent/KR0130712B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/12—Platforms; Forks; Other load supporting or gripping members
    • B66F9/16—Platforms; Forks; Other load supporting or gripping members inclinable relative to mast

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

본 발명에서는 각부에 동력을 제공하는 모터와 기어펌프 사이에 감속기가 설치되어, 소음 및 전력소모를 줄이고, 장기간 사용하더라도 기계적인 무리가 없어 사용수명이 크게 연장시킬 수 있게 하고, 지게차의 감속/제동이 부드럽게 이루어질 수 있도록 유로상에 스피드 콘트롤밸브를 설치하고, 상기 스피드 콘트롤밸브에 리프트를 상 · 하로 구동시키는 승 ·하강실린더의 구동부측과 연결되어 화물의 자중에 의해 내부압력이 가변되는 구성을 가지는 콘트롤밸브를 설치하여 화물의 자중에 의해 가변되는 부압이 주행속도를 제어하도록 된 스피드 콘트롤밸브에 작용하도록 하고, 구동장치를 제어하도록 된 브레이크장치에 안전밸브를 부가하여 고하중시의 2차 제동효과를 가질 수 있도록 한 것임.In the present invention, the reduction gear is installed between the motor and the gear pump to provide power to each part, to reduce the noise and power consumption, so that even long-term use, there is no mechanical burden to greatly extend the service life, deceleration / braking of the forklift The speed control valve is installed on the flow path so as to be smoothly formed, and the speed control valve is connected to the drive side of the lift cylinder, which drives the lift up and down, so that the internal pressure is varied by the weight of the cargo. By installing a control valve, the negative pressure, which is variable by the weight of the cargo, acts on the speed control valve to control the running speed, and by adding a safety valve to the brake system that controls the driving device, the secondary braking effect at high load is achieved. It is to have it.

Description

지게차 구동용 유압장치Hydraulic device for driving forklift

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명에 따른 지게차의 유압 회로도1 is a hydraulic circuit diagram of a forklift according to the present invention.

Claims (3)

외부 동력원으로부터 동력을 발생시키는 동력발생장치(1)와, 화물을 들어올리고 내리는 리프트를 구동하는 실린더 (2)와, 차륜이 구비되는 구동부(3)로 되는 것에 있어서, 상기 실린더 (2)와 구동부(3)를 연결하는 유로의 중간에 설치되는 스피드 콘트롤밸브 (4)와, 스피드 콘트롤밸브 (4)와 리프트를 승강시키는 승·하강실린더(2a)의 구동부측 유로상에 설치되어 화물의 자중에 비례하는 압력을 발생시켜 스피드 콘트롤밸브(4)에 상기 부압이 작용하도록 구성되는 자중제어밸브(5)와, 구동부(3)측 유로에 설치되는 안전밸브(6)와 구동장치 (7)로 구성되는 것을 특징으로 하는 지게차 구동용 유압장치.The cylinder 2 and the drive unit in the power generator 1 for generating power from an external power source, a cylinder 2 for driving a lift for lifting and unloading cargo, and a drive unit 3 with wheels. (3) is installed on the speed control valve (4) installed in the middle of the flow path connecting the drive control side of the lift cylinder (2a) for lifting and lowering the speed control valve (4) and the lift It is composed of a self-weight control valve (5) configured to generate a proportional pressure so that the negative pressure acts on the speed control valve (4), a safety valve (6) and a drive device (7) provided in the flow path of the drive section (3). Hydraulic device for driving a forklift, characterized in that. 제1항에 있어서, 상기 동력발생장치 (1)에는 감속기(13)가 설치됨을 특징으로 하는 지게차 구동용 유압장치.The hydraulic device for driving a forklift according to claim 1, wherein the power generator (1) is provided with a reducer (13). 제2항에 있어서, 스피드 콘트롤밸브(4)는 본체 (40)와, 스프링(42a)의 탄성을 보유하도록 링크(42b)로 연결되는 족답식페달(42)과, 본체 (40)의 내측에 내장되는스풀(43)로되고, 상기 스풀(43)과 족답식페달(42)을 축(44)으로 조립하여 족답식페달(42)과 함께 스풀(43)이 동일한 방향으로 소정의 각도만큼 회동되게 구성되며, 상기 본체 (40)에는 내측에 스풀(43)이 안치되는 중앙유로와 연통되는 유로(46: 461,462,463,464,465)가 형성되어, 유로(461)에 실린더 (2)의 분류밸브(20)에 연결되는 유압라인(27)을, 유러 (462)에 컨트롤밸브(5)와 연결되는 유압라인(47)을, 유로(463)에 구동부측 분류밸브(30)와 연결되는 유압라인(33c)을, 유로(464)에 오일탱크(14)와 연결되는 유압라인(48)을, 유리 (465)에는 구동부(3)측 분류밸브(30)의 공급구로 접속되는 유압라인(45)이 각각 연결되며, 상기 자중제어밸브(5)의 몸체(50)에 중앙유로와 연통되는 유로(51,52,53)가 설치되어, 유로(51)에 스피드 콘트롤밸브(4)의 유압라인(47)이 연결되며, 유로(52)에는 승·하강실린더 (2a)의 구동부측 유압라인(25a)에 접속되는 유압라인(52a)이 연결되고, 유러(53)에는 오일탱크(14)와 접속되는 유압라인(53a)이 연결되며, 모체(50)의 내측으로 끼워지는 스프링(54)의 양끝단에 밸브(55,56)가 설치되어 스프링 (54)의 탄성을 보유하는 밸브(55,56)가 유로(51,52)를 차단하도록 구성되고, 상기 안전밸브(6)는 몸체(60)의 내측에 형성되는 유로(61,62) (63,64) (65)와 중앙유로(600,601)가 서로 연통하도록 되고, 각각의 유로(61,62) (63,64) (65)는 중앙유로(600,601)에 내설되는 스프링의 탄성을 보유하는 스풀(66)과 일방향체크밸브용 볼 (67a,67b)의 의해 유로를 개/폐시키도록 구성되고, 상면에 설치되는 하우징 (68)의 내측에 서로 다른 강성으로 된 스프링 (68a,68b)의 탄성을 보유하는 피스톤(P)이 삽입되며, 상기 하우징 (68)의 하부측에 중앙유로(600)와 연통되는 유로(603,604,605)가 설치되며, 상기 구동장치 (7)는 하우징 (70)과, 상기 하우징 (70)내에 장착되는 회전로터 (71)와, 커버 (73)로 구성되며, 상기 회전로터 (71)의 내측 중앙으로 축착되는 샤프트(74)에는 일측에 차륜(W)측과 연결되는 스플라인(741)이 구비되는 것을 특징으로 하는 지게차 구동용 유압장치.The speed control valve (4) according to claim 2, wherein the speed control valve (4) is built into the main body (40), the stepping pedal (42) connected by the link (42b) to retain the elasticity of the spring (42a), and the inside of the main body (40). The spool 43 is assembled, and the spool 43 and the stepping pedal 42 are assembled to the shaft 44 so that the stepping pedal 42 and the spool 43 are rotated by a predetermined angle in the same direction. In the main body 40, flow paths 46: 461, 462, 463, 464, 465 are formed in communication with the central flow path in which the spool 43 is placed, and the hydraulic pressure is connected to the flow dividing valve 20 of the cylinder 2 in the flow path 461. The line 27 is connected to the hydraulic line 47 connected to the control valve 5 to the euro 462, and the hydraulic line 33c connected to the drive valve side separation valve 30 is connected to the oil passage 463. A hydraulic line 48 connected to the oil tank 14 is connected to the oil tank 14, and a hydraulic line 45 connected to the supply port of the dividing valve 30 on the driving unit 3 side is connected to the glass 465, respectively. My Flow paths 51, 52, and 53 are installed in the body 50 of the air valve 5, and the hydraulic lines 47 of the speed control valve 4 are connected to the flow path 51. The hydraulic line 52a connected to the hydraulic line 25a of the drive part side of the raising / lowering cylinder 2a is connected to the 52, and the hydraulic line 53a connected to the oil tank 14 is connected to the euro 53. Valves 55 and 56 are installed at both ends of the spring 54 which are fitted into the mother body 50 so that the valves 55 and 56 which retain the elasticity of the spring 54 are flow paths 51 and 52. ) And the safety valve 6 is configured such that the flow paths 61, 62, 63, 64, 65 and the central flow path 600, 601 formed inside the body 60 communicate with each other. The flow paths 61, 62, 63, 64, 65 are opened by the spool 66 and the one-way check valve balls 67a, 67b which retain the elasticity of the spring in the central flow paths 600,601. Configured to be closed / closed and mounted on top (68) A piston P having elasticity of springs 68a and 68b of different rigidity is inserted therein, and flow paths 603, 604 and 605 communicating with the central channel 600 are installed on the lower side of the housing 68. The drive unit 7 includes a housing 70, a rotating rotor 71 mounted in the housing 70, and a cover 73, and a shaft which is condensed to the inner center of the rotating rotor 71. 74, the hydraulic device for driving a forklift, characterized in that the spline 741 is connected to one side of the wheel (W) side. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950023612A 1995-08-01 1995-08-01 Action device in fork lift truck KR0130712B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950023612A KR0130712B1 (en) 1995-08-01 1995-08-01 Action device in fork lift truck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950023612A KR0130712B1 (en) 1995-08-01 1995-08-01 Action device in fork lift truck

Publications (2)

Publication Number Publication Date
KR970010633A true KR970010633A (en) 1997-03-27
KR0130712B1 KR0130712B1 (en) 1998-04-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950023612A KR0130712B1 (en) 1995-08-01 1995-08-01 Action device in fork lift truck

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100481447B1 (en) * 1997-07-28 2005-07-28 대우종합기계 주식회사 Hydraulic motor speed control device of electric forklift

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100481447B1 (en) * 1997-07-28 2005-07-28 대우종합기계 주식회사 Hydraulic motor speed control device of electric forklift

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Publication number Publication date
KR0130712B1 (en) 1998-04-10

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