WO1996022937A1 - Control unit for hand-operated hydraulic jack - Google Patents

Control unit for hand-operated hydraulic jack Download PDF

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Publication number
WO1996022937A1
WO1996022937A1 PCT/CN1996/000008 CN9600008W WO9622937A1 WO 1996022937 A1 WO1996022937 A1 WO 1996022937A1 CN 9600008 W CN9600008 W CN 9600008W WO 9622937 A1 WO9622937 A1 WO 9622937A1
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WO
WIPO (PCT)
Prior art keywords
oil
manual
lifting
control device
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN1996/000008
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English (en)
French (fr)
Inventor
Xuanzhe Hu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shinn Hua China Machinery Co Ltd
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Shinn Hua China Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shinn Hua China Machinery Co Ltd filed Critical Shinn Hua China Machinery Co Ltd
Priority to AU45338/96A priority Critical patent/AU4533896A/en
Priority to US08/894,067 priority patent/US5992149A/en
Priority to EP96901215A priority patent/EP0806395A4/en
Publication of WO1996022937A1 publication Critical patent/WO1996022937A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand

Definitions

  • the present invention relates to a manual hydraulic implement control device, which belongs to a hydraulically operated device for continuously lifting a load.
  • the purpose of the present invention is to overcome the shortcomings of the existing hydraulic jacks and provide the society with a manual hydraulic implement control device that not only has a light load acceleration function, but also can achieve heavy load increase, and is simple and reliable to operate.
  • the device of the present invention includes a control handle, a manual small pump, a lifting and clamping cylinder, and an inlet and an oil return path, wherein:
  • A) The oil inlet of the lifting clamp cylinder is connected to a manual small pump with a return spring through a lifting clamping oil circuit with a check valve, and the manual small pump is controlled by the handle; B) The lifting clamping oil path is provided with a light-load acceleration oil path; C) The return oil path of the lifting clamping cylinder has a drain valve.
  • Figure 1 is a hydraulic system diagram of an embodiment of the present invention.
  • Figure 2 is a hydraulic system diagram of another embodiment of the present invention.
  • Figure 3 is a hydraulic system diagram of a third embodiment of the present invention.
  • FIG. 1 The schematic diagram of the hydraulic system of this embodiment is shown in Fig. 1.
  • the small pump 2, the lifting clamp cylinder 4 and the large pump 6 both use single-acting cylinders to control the handlebars.
  • the upper end of 1 is provided with a touch point 16.
  • a large amount of oil discharged from the large pump 6 flows through the check valve 7 and merges with the oil flow from the small pump 2 , and then enters the lifting clamp through the check valve 3.
  • the oil cylinder 4 makes the working end of the lifting and clamping oil cylinder 4 approach the receiving and clamping parts quickly.
  • the telescopic sleeve oil cylinder is used as the lifting and clamping oil to increase the stroke. At this time, it also serves as a large pump for the oil tank.
  • the volume of the cylinder should meet the needs of all sets of extensions. If the machine has no special stroke requirements, ordinary piston cylinders or plunger cylinders can be used as the lifting clamp cylinder.
  • the large pump 6 is blocked, and the control handle 1 is reset by the return spring 5.
  • the control handle 1 is pressed again, the high-pressure oil from the small pump 2 flows through the check valve 3 and enters the oil cylinder 4 to drive its working end to work.
  • the mechanical reversing valve 9 is closed, and the one-way valves 3 and 7 close the oil return path of the lifting clamp cylinder 4, as long as the control handle 1 is not raised, the lifting Clamping cylinder 4 is maintained at a fixed pressure.
  • the lifting clamping cylinder 4 and the large pump 6 both adopt double-acting cylinders, while the small pump 2 is still a single-acting cylinder, which is difficult to control the return, but requires precise positioning and reliability.
  • High-powered equipment, and an accumulator 14 and a pressure gauge 15 are added for this purpose.
  • the fluid is replenished (via the communication line between the two); a large amount of oil flow from the rodless end of the large pump 6 passes through the hydraulic control check valve 10 and enters the rodless end of the lifting clamp cylinder 4 while another One line of oil flows through the one-way ⁇ 7 and merges with the oil flow from the small pump 2, and then enters the rodless end of the oil cylinder 4 through the one-way valve 3.
  • the two oil flows push the piston in the oil cylinder 4 to move quickly, thereby achieving light load.
  • the purpose of acceleration After the working end of the lifting clamp cylinder 4 touches the workpiece, the large pump 6 is blocked, and the control handle 1 is reset by the action of the spring 5. At this time, the handle 1 is depressed again, and the small pump 2 will be pumped out.
  • the high-pressure oil flow directly acts on the lifting of the oil plug in the clamping cylinder 4 to complete the large-tonnage movement of the machine.
  • the divided oil enters the accumulator 14 to accumulate energy, and part of the oil flow drives the pressure gauge 15 to indicate the oil pressure.
  • the oil entering the cylinder 4 , the accumulator and the pressure gauge 15 is due to the presence of the check valves 3, 7, 10 There is no way to return, so that the pressure of the machine can not be maintained. If the handle 1 is lifted up, the rodless end of the large pump 6 will be evacuated, and the rodized end will provide pressure oil to open the hydraulic control check valve 10 to open.
  • a small oil cylinder 8 is connected in series under the lifting and clamping oil cylinder 4,
  • the second oil cylinder is driven by the manual small pump 2, and the movement of the oil cylinder is controlled by the sequence valve 11.
  • the fuel tank 13 is still retained in this example.
  • Move the handle 1, the small pump 2 The piston is first reset by the spring 5 and sucks oil from the oil tank 13 via the check valve 7. Press the handle 1, and the pressure oil pumped from the small pump 2 enters the small oil cylinder 8 through the one-way valve 3, because the small oil cylinder 8 and lift
  • the clamping cylinder 4 is connected in series.
  • the piston in the small cylinder 8 will move at a speed several times that of the piston in the small pump 2.
  • the plunger in the clamping cylinder 4 will approach the workpiece quickly, and the lower part of the clamping cylinder 4 will be raised at the same time.
  • the space in the tank 13 is supplemented by the oil in the tank 13 through the check valve 42 to achieve light load acceleration.
  • the sequence valve 11 is actuated to open the oil inlet of the oil cylinder 4.
  • the pressure oil enters the lifting and holding oil cylinder 4 and the small oil cylinder 8 at the same time.
  • the directional valve 12 is in a closed state, and the pressure of the large and small cylinders is not maintained.
  • the lift handle 1 When resetting is required, the lift handle 1 can be raised so that the contact point 16 on it simultaneously opens the two mechanical directional valves 12 and the oil in the two cylinders will flow back due to the force of gravity and the spring 41 spring force. Fuel tank 13, thus achieving a quick reset.
  • the present invention has been verified many times, and it can indeed complete all the operations of the hydraulic machine by the three operating conditions of a handle, and achieves light load speed increase, heavy load power increase, reset control and sensitive and reliable control.
  • the invention can also meet Control requirements for various manual hydraulic implements.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Description

手动液压机具控制装置
技术领域
本发明涉及一种手动液压机具控制装置， 它属于液压 操纵的、 用于连续地提升载荷的装置类.
技术背景
现有的同类装置见于液压千斤顶， 它由一个手动小泵 缸 （简称小泵） 、 一个提升油缸、 两个单向阀、 一个手动 放油塞 （ 阀 ） 和油箱组成. 反复扳动小泵的手把， 小泵因 单向阀的作用依次完成吸油、 压油动作， 驱动提升油缸实 现大吨位提升. 它的明显缺陷是趋近待提升件的速度 （ 轻 载速度） 很慢， 且需手动开启放油塞 （ 阀 ） 卸荷并施加外 力复位， 不仅操作烦瑣， 而且效率低下， 确有改进必要. 发明的公开
本发明的 目 的是克服现有液压千斤顶的多种不足之 处， 向社会提供一种既有轻载加速功能， 又能实现重载增 力、 且操作简便可靠的手动液压机具控制装置.
本发明的装置包括控制手把、 手动小泵、 提升夹持油 缸及进、 回油路， 其中：
A)所述提升夹持油缸的进油通过具有单向阀的提升夹 持油路与具有复位弹簧的手动小泵相连， 而手动小泵用手 把加以控制； B)具单向阀的所述提升夹持油路上附设有 轻载加速油路； C)所述的提升夹持油缸的回油路具有一 放油阀.
附图的简要说明
以下将通过附图及实施例对本发明作进一步说明. 6/22937
附图 1是本发明的一种实施例的液压系统图.
附图 2是本发明另一实施例的液压系统图.
附图 3是本发明第三种实施例的液压系统图.
图中， 1控制手把， 2手动小泵， 3、 7、 42单向阀，
4提升夹持油缸， 5、 41复位弹簧， 6手动大泵， 8小油 缸， 9、 12机械换向阀， 10液控单向阀， 11顺序阀， U 油箱， 14蓄能器， 15压力表， 16控制手把上的碰点. 实现本发明的最佳方式
实施例一
本实施例的液压系统原理图如图 1 所示. 其中的小泵 2、 提升夹持油缸 4和大泵 6均采用单作用油缸， 控制手把
1上端设有碰点 16 . 压下控制手把 1， 由大泵 6排出的大 量油流经单向阀 7后与出自小泵 2的油流汇合， 再经单向 阀 3进入提升夹持油缸 4 , 使提升夹持油缸 4的工作端快 速趋近受提升夹持件. 在这里使用伸缩式套筒油缸作提升 夹持油鉦， 是为的加大行程， 此时兼作油箱的大泵缸的容 积， 应满足全部套简伸出的需要. 机具如无特别行程要求 时， 则可采用普通活塞式油缸或柱塞式油缸作提升夹持油 缸. 提升夹持油釭的工作端一旦触及工件， 则大泵 6受阻， 同时控制手把 1 由复位弹簧 5复位； 再按压控制手把 1 ， 则会从小泵 2泵出高压油流经单向阀 3进入油缸 4， 驱动 其工作端作提升夹持工件的运动. 在以上过程中， 机械换 向阀 9处于关闭状态， 单向阀 3、 7又关闭了提升夹持油 缸 4的回油通路， 只要不上提控制手把 1， 提升夹持油缸 4 均保压不动. 一旦上提控制手把 1 ， 则在小泵 2和大泵 6 被抽真空的同时， 手把 1 上的碰点 16 又启开机械换向阀 9 , 于是提升夹持油缸 4 中的油液受重力、 大气压力和复 位弹簧 41之弹力的驱使， 经机械式换向阀 9流回大泵 6的 缸体， 机具快速地自动复位， 而且显然其复位开度可由控 制手把 1任控.
实施例二
在图 2所示的实施例中， 提升夹持油缸 4和大泵 6均 采用双作用油缸， 而小泵 2仍为单作用缸， 用于控制回位 较困难但又要求精确定位、 可靠性高的机具， 并为此增设 了蓄能器 14和压力表 15 . 下压控制手把 1， 大泵 6的有 杆端被抽空， 其空间将被提升夹持油缸 4有杆端内的油液 予以补充 （经过二者之间的连通管路） ； 从大泵 6无杆端 中压出的大量油流经过液控单向阀 10进入提升夹持油缸 4 的无杆端内， 同时另一路油流经单向阖 7与出自小泵 2 的 油流汇合， 再经单向阀 3进入油缸 4的无杆端， 两路油流 推动油缸 4 内的活塞迅速移动， 从而达到了轻载加速的目 的. 待提升夹持油缸 4的工作端触及工件后， 大泵 6受阻， 控制手把 1 因弹簧 5的作用而复位， 此时再下压手把 1 ， 则小泵 2将泵出高压油流直接作用于提升夹持油缸 4 中的 油塞， 使机具完成大吨位运动， 同时有部分油液进入蓄能 器 14 以蓄能， 部分油流驱动压力表 15使指示油压. 进入 油缸 4、 蓄能器 和压力表 15的油液因单向阀 3、 7、 10的存在而无路返回， 从而使机具保压不动. 倘若上提手 把 1 ， 则大泵 6的无杆端被抽空， 而其有杆端会提供压力 油以开启液控单向阀 10， 从而打通油缸 4、 大泵 6无杆端 的回油通道， 油流经油缸 4和大泵 6之间的连通管路进入 油缸 4有杆端内， 推动其活塞快速复位.
实施例三
在本实施例中， 提升夹持油缸 4下串接有小油缸 8 ， 二油缸靠手动小泵 2驱动， 且油缸的动作又由顺序阀 11控 制. 为满足大吨位、 大行程运动的需油量， 本实旄例仍保 留油箱 13 . 扳动手把 1、 小泵 2之活塞先靠弹簧 5复位， 经由单向阀 7从油箱 13中吸油； 下压手把 1、 从小泵 2中 泵出的压力油经单向阀 3进入小油缸 8， 由于小油缸 8与 提升夹持油缸 4串接，小油缸 8中的活塞将以数倍于小泵 2 中活塞的移动速度， 推举提升夹持油缸 4 中的柱塞快速趋 近工件， 同时提升夹持油缸 4下部造成的空间， 由油箱 13 中的油液经单向阀 42予以补充， 从而实现了轻载加速. 提 升夹持油缸 4的工作端一触及工件，就会使小油缸 8受阻， 系统压力升高， 堠序阀 11动作以打开油缸 4的进油口， 压 力油同时进入提升夹持油缸 4和小油缸 8 , 二缸合力提升 夹持工作. 从而实现了重载增力， 此时由于两个机械换向 阀 12处于关闭状态， 大小油缸均保压不动. 需复位时可上 提升把 1， 使其上的碰点 16同时碰开两个机械换向阀 12 , 就会令两缸中的油液因受重力和弹簧 41弹力的驱使，流回 油箱 13， 从而实现了快速复位.
工业应用性
本发明经多次验证， 确能靠一个手把的三种工况完成 液压机具的全部操作， 做到了轻载增速、 重载增力、 复位 任控且控制灵敏可靠. 本发明亦可满足多种手动液压机具 的控制要求.

Claims

权利要求书
ι·一种手动液压机具控制装置， 包括控制手把 （ 1 ) 、 手动小泵 （ 2 ) 、 提升夹持油缸 （ 4 ) 及进、 回油路， 其 特征在于：
Α)所述提升夹持油缸 （ 4 ) 的进油通过具有单向阀 ( 3 ) 的提升夹持油路与具有复位弹簧 （ 5 ) 的手动小泵 ( 2 ) 相连， 而手动小泵 （ 2 ) 用手把 （ 1 ) 加以控制；
Β)具单向阀 （ 3 ) 的所述提升夹持油路上附设有轻载 加速油路；
C)所述的提升夹持油缸 （ 4 ) 的回油路具有一放油 阀.
2·如权利要求 1 所述的手动液压机具控制装置， 其特 征在于， 在所述控制手把 （ 1 ) 的上端设有用于开启回油 路中的放油阀的碰点 （ 16 ) .
3·如权利要求 1 所述的手动液压机具控制装置， 其特 征在于，
所述轻载加速油路包括与所述手动小泵 （ 2 ) 并接的 手动大泵 （ 6 )和串接在手动小泵 （ 2 )和手动大泵 （ 6 ) 之间的单向阀 （ 7 ) , 该手动大泵 （ 6 ) 与手动小泵 （ 2 ) 共用所述控制手把 （ 1 ) .
4·如权利要求 3 所述的手动液压机具控制装置， 其特 征在于，
所述回油路中的放油阀是液压单向阀 （ 10 ) .
5·如权利要求 2或 3所述的手动液压机具控制装置，其 特征在于， 6/22937
所述回油路中的放油阀是机械换向阀 （ 9 ) , 并由碰 点 （ 16 ) 加以控制.
6·如权利要求 2 所述的手动液压机具控制装置， 其特 征在于，
所述轻载加速油路包括串接在所述提升油缸之下的小 油缸 （ 8 ) .
7.如权利要求 6 所述的手动液压机具控制装置， 其特 征在于，
所述回油路中的放油阀是顺序阀 （ 1 1 ) , 且在顺序阀 ( 11 ) 的两端附设有一对并接的机械换向阀 （ 12 ) ， 所 述提升夹持油叙 ( 4 )还附设有具有单向阀 （ 42 ) 的充油 油路.
8. 如权利要求 1所述的手动液压机具控制装置， 其特 征在于， 在所述提升夹持油缸 （ 4 ) 的进油路上并接有蓄 能器 （ 14 ) 和压力表 （ 15 ) ·
9.一种制备手动液压提升起重装置的方法， 其中采用 权利要求 1所述的手动液压机具控制装置.
10.一种制备手动液压夹持装置的方法， 其中采用权利 要求 1所述的手动液压机具控制装置.
11 ·一种制备手动液压机装置的方法， 其中采用权利要 求 1所述的手动液压机具控制装置.
PCT/CN1996/000008 1995-01-28 1996-01-26 Control unit for hand-operated hydraulic jack Ceased WO1996022937A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU45338/96A AU4533896A (en) 1995-01-28 1996-01-26 Control unit for hand-operated hydraulic jack
US08/894,067 US5992149A (en) 1995-01-28 1996-01-26 Control unit for hand-operated hydraulic jack
EP96901215A EP0806395A4 (en) 1995-01-28 1996-01-26 CONTROL UNIT FOR HYDRAULIC CYLINDER WITH MANUAL CONTROL

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN95110630A CN1037759C (zh) 1995-01-28 1995-01-28 手动液压机具控制装置
CN95110630.9 1995-01-28

Publications (1)

Publication Number Publication Date
WO1996022937A1 true WO1996022937A1 (en) 1996-08-01

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ID=5077997

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN1996/000008 Ceased WO1996022937A1 (en) 1995-01-28 1996-01-26 Control unit for hand-operated hydraulic jack

Country Status (5)

Country Link
US (1) US5992149A (zh)
EP (1) EP0806395A4 (zh)
CN (1) CN1037759C (zh)
AU (1) AU4533896A (zh)
WO (1) WO1996022937A1 (zh)

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CN1202000C (zh) * 1999-09-10 2005-05-18 Mvp(香港)工业有限公司 可自动调节提升速度的液压顶举装置
CN1328147C (zh) * 2001-09-24 2007-07-25 范群 一种多级调速千斤顶
US6742767B1 (en) * 2003-03-17 2004-06-01 Spx Corporation Floor jack apparatus and method
CN101761001B (zh) * 2010-03-03 2012-05-30 张长友 多级液压缸起道拨道器
US20140158962A1 (en) * 2011-03-16 2014-06-12 Brookfield Hunter, Inc. Hydraulic pumping cylinder and method of pumping hydraulic fluid
HK1153350A2 (zh) * 2011-10-28 2012-03-23 Kam Wa Tai 能量收集器
CN102583189A (zh) * 2012-02-27 2012-07-18 温州得力康电子有限公司 一种电动液压千斤顶
US9114964B2 (en) * 2012-05-11 2015-08-25 Tronair, Inc. Dual-speed hand pump aircraft jack
CN104909299A (zh) * 2015-06-30 2015-09-16 丁巧娜 一种千斤顶
TWI555696B (zh) * 2015-07-07 2016-11-01 Zong-Yi Yang Jack loose structure manually
CN108394834B (zh) * 2018-03-20 2019-07-26 浙江工贸职业技术学院 一种自锁式液压升降台

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US5992149A (en) 1999-11-30
CN1037759C (zh) 1998-03-18
AU4533896A (en) 1996-08-14
EP0806395A1 (en) 1997-11-12
CN1112517A (zh) 1995-11-29
EP0806395A4 (en) 2000-03-15

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