WO2013067799A1 - Vérin hydraulique à plusieurs étages et simple effet et engin de génie civil utilisant ce vérin - Google Patents

Vérin hydraulique à plusieurs étages et simple effet et engin de génie civil utilisant ce vérin Download PDF

Info

Publication number
WO2013067799A1
WO2013067799A1 PCT/CN2012/073904 CN2012073904W WO2013067799A1 WO 2013067799 A1 WO2013067799 A1 WO 2013067799A1 CN 2012073904 W CN2012073904 W CN 2012073904W WO 2013067799 A1 WO2013067799 A1 WO 2013067799A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
hydraulic cylinder
chamber
acting hydraulic
stage single
Prior art date
Application number
PCT/CN2012/073904
Other languages
English (en)
Chinese (zh)
Inventor
王继努
李天富
费望龙
Original Assignee
湖南三一智能控制设备有限公司
三一重工股份有限公司
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 湖南三一智能控制设备有限公司, 三一重工股份有限公司 filed Critical 湖南三一智能控制设备有限公司
Publication of WO2013067799A1 publication Critical patent/WO2013067799A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/204—Control means for piston speed or actuating force without external control, e.g. control valve inside the piston

Definitions

  • Multi-stage single-acting hydraulic cylinder and construction machine having the same
  • the present invention relates to the field of construction machinery, and more particularly to a multi-stage single-acting hydraulic cylinder and a construction machine therewith.
  • the control method using the displacement sensor to control the cylinder speed of each stage is complicated, and the structural complexity, assembly difficulty and cost of the multi-stage single-acting hydraulic cylinder are improved.
  • the present invention is directed to a multi-stage single-acting hydraulic cylinder to solve the above-described problems of the prior art multi-stage single-acting hydraulic cylinder.
  • a multi-stage single-acting hydraulic cylinder comprising: a first piston sleeved in a first piston chamber and slidable along a first piston chamber; a first piston rod, and a first piston Connecting and passing through the first piston chamber; a central portion of the first piston and the first piston rod forms a second piston chamber; a second piston is sleeved in the second piston chamber and slidable along the second piston chamber; a piston rod is connected to the second piston and passes through the second piston chamber; the first piston is provided with a snap ring disposed on the second piston chamber, and the snap ring is provided with a rodless rod connecting the first piston chamber a first orifice of the chamber and the rodless chamber of the second piston chamber.
  • the first throttle hole is a fixed throttle hole, and includes a first hole segment, a tapered transition hole segment and a second hole segment, which are sequentially connected, the aperture of the second hole segment is smaller than the aperture of the first hole segment, and The second bore section is coupled to the rodless cavity of the second piston chamber.
  • the first orifice is a variable orifice.
  • the snap ring is screwed to the first piston.
  • the first throttle hole is centered.
  • first piston and the second piston are respectively provided with a rodless cavity communicating with the piston chamber in which the piston is located and a second orifice having a rod cavity.
  • a plurality of second orifices are disposed on the first piston and the second piston.
  • the multi-stage single-acting hydraulic cylinder is a two-stage single-acting hydraulic cylinder, and the cylinder of the second-stage single-acting hydraulic cylinder forms a first piston chamber.
  • first piston and the first piston rod are integrally formed.
  • the first piston is provided with a snap ring disposed on the second piston cavity
  • the snap ring is provided with a rodless cavity connecting the first piston cavity and the second piston cavity without the rod a first orifice of the chamber, such that when the first piston drives the first piston rod stroke, the hydraulic oil enters the rodless chamber of the second piston chamber through the first orifice, and pushes the second piston to move, although The diameter of the two piston chambers becomes smaller with respect to the first piston chamber, and the load of the second piston rod becomes smaller, but under the active throttling of the first orifice, the hydraulic oil is injected into the rodless chamber of the second piston chamber more slowly.
  • the second piston drives the second piston rod to operate at a constant speed, thereby providing a multi-stage single-acting hydraulic cylinder with a structural unit, easy assembly, low cost and ensuring uniform operation of the piston rods.
  • the multi-stage single-acting hydraulic cylinder of the present invention does not need to be thinner, so it is also suitable for working conditions with large pressure shock.
  • Figure 1 is a view schematically showing the structure of a multi-stage single-acting hydraulic cylinder of the present invention
  • Figure 2 is a partial enlarged structure of Figure 1;
  • Fig. 3 schematically shows the structure of the snap ring of the present invention.
  • a first piston chamber 10 is formed in the cylinder 1 of the single-acting hydraulic cylinder, and a first piston (i.e., a first-stage piston) 11 is sleeved in the first piston chamber 10 and slidable along the first piston chamber 10.
  • the first piston rod (i.e., the primary piston rod) 13 is coupled to the first piston 11 and passes through the first piston chamber 10.
  • the first piston 11 and the first piston rod 13 cooperate to divide the first piston chamber 10 into a rodless chamber 12 and a rod chamber (not labeled).
  • the first piston 1 1 and the first piston rod 13 form a second piston chamber 20.
  • a pressure oil passage 16 that communicates with the rodless chamber 12 is opened in the cylinder block 1.
  • a guide sleeve 15 of the first piston rod 13 is also disposed in the first piston chamber 10.
  • the second piston 21 (i.e., the secondary piston) is sleeved in the second piston chamber 20 and slidable along the second piston chamber 20.
  • the second piston rod (i.e., the secondary piston rod) 23 is coupled to the second piston 21 and is passed out of the second piston chamber 20.
  • the second piston 21 and the second piston rod 23 cooperate to divide the second piston chamber 20 into a rodless chamber 22 and a rod chamber (not labeled).
  • the first piston 11 is provided with a snap ring 3 disposed on the second piston chamber 20, and the snap ring 3 is provided with a rodless cavity 12 communicating with the first piston cavity 10 and a rodless cavity 22 of the second piston cavity 20.
  • the first orifice 30 allows the hydraulic oil to pass through the first orifice 30 to enter the rodless chamber 22 of the second piston chamber 20, thereby pushing the second piston 21 to move the second piston rod 23.
  • the snap ring 3 is screwed to the first piston 11, and the connection is reliable and easy to assemble and disassemble.
  • the first piston 11 and the first piston rod 13 are integrally formed, or may be welded together.
  • the working principle of the two-stage single-acting hydraulic cylinder according to the present invention is as follows:
  • the hydraulic oil enters the rodless chamber 12 through the pressure oil passage 16, and then pushes the first piston 1 1 and the first piston rod 13 to move, and then the second The piston 21 and the second piston rod 23 move at a constant speed.
  • the first piston 11 stops moving and generates an impact on the cylinder 1.
  • the second piston 21 drives the second piston rod 23 to start moving along the second piston chamber 20.
  • a multi-stage single-acting hydraulic cylinder having a structural unit, easy assembly, low cost, and ensuring uniform operation of the piston rods at all levels is provided.
  • the multi-stage single-acting hydraulic cylinder does not need to make the cylinder thin, so it is also suitable for working conditions with large pressure shock.
  • the first orifice 30 is a fixed orifice, that is, the first orifice is an orifice having a constant flow rate, and the fixed orifice can be directly processed on the snap ring 3.
  • a preferred embodiment of a fixed orifice is shown comprising a first bore section 31, a tapered transition bore section 32 and a second bore section 33 which are connected in series, the second bore section 33 having a smaller diameter
  • the aperture of the first bore section 31, and the second bore section 33 is coupled to the rodless cavity 22 of the second piston chamber 20 to achieve an active throttling effect.
  • the first orifice 30 is a variable orifice, that is, the first orifice 30 is an orifice having an adjustable flow rate.
  • the variable orifice can be realized by installing a flow regulating member in a fixed orifice opened in the snap ring 3, or by installing a standard orifice member on the snap ring 3.
  • the first orifice 30 is a variable orifice, it can adapt to different needs of different working conditions.
  • the first orifice 30 is centrally disposed to force the second piston 21 to be uniform.
  • the first piston 11 and the second piston 21 are provided with a rodless cavity communicating with the piston chamber in which they are located and a second orifice 60 having a rod cavity.
  • the second orifice 60 only acts as a through-flow, so that the oil of the rod chamber of each piston chamber can flow into the rod-free cavity, and the back pressure is not possible, the pressure shock to the hydraulic cylinder is reduced, and the sealing member is protected.
  • the first piston 11 and the second piston 21 are each provided with a plurality of second orifices 60, and the plurality of second orifices 60 on each piston are uniformly disposed in the circumferential direction.
  • the two-stage single-acting hydraulic cylinder is taken as an example, it is obvious that the technical solution of the present invention can also be applied to the multi-stage single-acting hydraulic cylinder of two or more stages, and is installed on the pistons of each stage.
  • the snap ring 3 with the first orifice 30 limits the flow of hydraulic oil entering the adjacent piston chamber by means of active throttling, and realizes constant speed operation of the piston rods of each stage.
  • the multi-stage single-acting hydraulic cylinder of the present invention utilizes the change of the internal structure of the piston chamber of the adjacent stage, adopts the method of active throttling to maintain the constant speed of the piston rods of each stage, has the advantages of reliable single barrel, and is resistant to impact. Strike, can withstand large load shocks.
  • the present invention also provides a construction machine provided with the above-described multi-stage single-acting hydraulic cylinder.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Abstract

L'invention porte sur un vérin hydraulique à plusieurs étages et simple effet et sur un engin de travaux publics utilisant ce vérin. Le vérin hydraulique à plusieurs étages et simple effet selon la présente invention comprend un premier piston emboîté dans une première chambre de piston et capable de coulisser le long de la première chambre de piston ; une première tige de piston reliée au premier piston et qui émerge de la première chambre de piston ; une seconde chambre de piston formée au point milieu entre le premier piston et la première tige de piston ; un second piston emboîté dans une seconde chambre de piston et capable de coulisser le long de la seconde chambre de piston ; et une seconde tige de piston reliée au second piston et qui émerge de la seconde chambre de piston ; et un jonc monté sur le premier piston et conçu pour couvrir la seconde chambre de piston ; et un premier trou d'étranglement est formé sur le jonc et est en communication avec une chambre sans tige de la première chambre de piston et avec une chambre sans tige de la seconde chambre de piston. L'engin de génie civil selon la présente invention comporte le vérin hydraulique à plusieurs étages et simple effet précités. Grâce à l'utilisation de la solution technique de la présente invention, la vitesse des tiges de piston de chacun des étages peut être maintenue constante par l'étranglement actif et il est possible d'éviter l'impact d'une grande charge.
PCT/CN2012/073904 2011-11-11 2012-04-12 Vérin hydraulique à plusieurs étages et simple effet et engin de génie civil utilisant ce vérin WO2013067799A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2011103573764A CN102410278A (zh) 2011-11-11 2011-11-11 多级单作用液压缸及具有其的工程机械
CN201110357376.4 2011-11-11

Publications (1)

Publication Number Publication Date
WO2013067799A1 true WO2013067799A1 (fr) 2013-05-16

Family

ID=45912537

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/073904 WO2013067799A1 (fr) 2011-11-11 2012-04-12 Vérin hydraulique à plusieurs étages et simple effet et engin de génie civil utilisant ce vérin

Country Status (2)

Country Link
CN (1) CN102410278A (fr)
WO (1) WO2013067799A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016064356A1 (fr) * 2014-10-20 2016-04-28 Gali̇poğlu Hi̇dromas Hi̇droli̇k Otomoti̇v Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Cylindre télescopique comportant une pluralité de pistons internes

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102410278A (zh) * 2011-11-11 2012-04-11 三一重工股份有限公司 多级单作用液压缸及具有其的工程机械
CN102996570B (zh) * 2012-11-28 2015-04-22 三一重工股份有限公司 单作用双级液压缸和工程机械
CN102927081A (zh) * 2012-12-07 2013-02-13 向光 客车空中充电四级气缸
CN105313278B (zh) * 2015-09-29 2017-07-18 苏州优耐鑫模具科技有限公司 叠层式注塑模具
CN106041717A (zh) * 2016-07-19 2016-10-26 苏州赫瑞特电子专用设备科技有限公司 一种研磨机或抛光机液压升降机构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308018A (en) * 1978-06-02 1981-12-29 Showa Manufacturing Co., Ltd. Trim-tilt device for marine propulsion devices
DE202005003031U1 (de) * 2005-02-23 2006-07-06 Doma-Tech Mainardi Ag Fluideinheit
CN101949398A (zh) * 2010-09-13 2011-01-19 三一重工股份有限公司 单作用液压油缸及具有该油缸的摊铺机
CN201827169U (zh) * 2010-10-12 2011-05-11 济南东奥自控技术有限公司 油口前置式多级液压缸
CN102410278A (zh) * 2011-11-11 2012-04-11 三一重工股份有限公司 多级单作用液压缸及具有其的工程机械

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE212374C1 (fr) *
GB613527A (en) * 1945-01-04 1948-11-30 Wagner Electric Corp Two-stage hydraulic master cylinder
DE924479C (de) * 1952-10-25 1955-03-03 Toussaint & Hess Gmbh Hydraulische Hubvorrichtung mit teleskopartig ineinander verschiebbaren Teilen
NL250626A (fr) * 1959-04-24
US3820772A (en) * 1972-11-24 1974-06-28 Gen Motors Corp Energy absorbing unit
DE2319344A1 (de) * 1973-04-17 1974-11-07 Jungheinrich & Co Maschf Doppeltwirkende teleskop-zylinderkolbenvorrichtung
GB1421096A (en) * 1974-05-23 1976-01-14 Up Right Inc Pneumatic telescopic hoist having three or more steps of extension
DE2754016C3 (de) * 1977-12-05 1981-11-19 Walter Mayer Fördertechnik GmbH, 7527 Kraichtal Hydraulischer Teleskop-Hubzylinder
JPH05172120A (ja) * 1991-12-24 1993-07-09 Koyo Seiki Kk 多段油圧シリンダ
CN2199347Y (zh) * 1994-06-29 1995-05-31 吴瑜华 具有液压阻尼器的气缸装置
CN2224945Y (zh) * 1995-04-18 1996-04-17 葛锡坤 一种缓冲式液压推动器
KR20040104212A (ko) * 2003-06-03 2004-12-10 서종배 복동형 다단실린더
CN2937072Y (zh) * 2006-08-09 2007-08-22 济宁市鲁星工程机械有限责任公司 双套筒伸缩油缸控制三节支腿伸缩装置
CN201121618Y (zh) * 2007-03-21 2008-09-24 北京航天发射技术研究所 正反腔节流缓冲多级液压缸
NL2001308C2 (nl) * 2008-02-21 2009-08-24 Actuant Corp Voertuigcabinekantelinrichting met telescopische kantelcilinder.
JP5493184B2 (ja) * 2008-05-12 2014-05-14 美和ロック株式会社 シリンダ装置、スプリングダンパー及びこれを用いたドアクローザ
CN101386092A (zh) * 2008-10-24 2009-03-18 田鹏飞 一种金属带锯床进给液压缸
CN201396336Y (zh) * 2009-03-26 2010-02-03 杭州西子船舶液压工程机械有限公司 具有缓冲装置的叉车用提升油缸
CN201636119U (zh) * 2010-03-08 2010-11-17 广东科达机电股份有限公司 一种新型油缸

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308018A (en) * 1978-06-02 1981-12-29 Showa Manufacturing Co., Ltd. Trim-tilt device for marine propulsion devices
DE202005003031U1 (de) * 2005-02-23 2006-07-06 Doma-Tech Mainardi Ag Fluideinheit
CN101949398A (zh) * 2010-09-13 2011-01-19 三一重工股份有限公司 单作用液压油缸及具有该油缸的摊铺机
CN201827169U (zh) * 2010-10-12 2011-05-11 济南东奥自控技术有限公司 油口前置式多级液压缸
CN102410278A (zh) * 2011-11-11 2012-04-11 三一重工股份有限公司 多级单作用液压缸及具有其的工程机械

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016064356A1 (fr) * 2014-10-20 2016-04-28 Gali̇poğlu Hi̇dromas Hi̇droli̇k Otomoti̇v Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Cylindre télescopique comportant une pluralité de pistons internes

Also Published As

Publication number Publication date
CN102410278A (zh) 2012-04-11

Similar Documents

Publication Publication Date Title
WO2013067799A1 (fr) Vérin hydraulique à plusieurs étages et simple effet et engin de génie civil utilisant ce vérin
CN102705288B (zh) 防抖式平衡阀、液压缸伸缩控制回路及液压设备
CN106015140A (zh) 一种平衡阀
WO2012156854A3 (fr) Structure d'amortisseur hydraulique
CN105221520A (zh) 顺序油缸
CN101949398A (zh) 单作用液压油缸及具有该油缸的摊铺机
US20180252242A1 (en) Double acting hydraulic pressure intensifier
CN105114665A (zh) 一种流量压力控制阀
CN105179361B (zh) 一种液压缓冲油缸及起重机
CN103867524B (zh) 一种双作用二级液压缸
CN102398866B (zh) 一种起重机变幅控制阀及起重机变幅液压系统
CN106286471B (zh) 导向缓冲装置、液压油缸及挖掘机
CN204328065U (zh) 液压阀及具有该液压阀的卷扬马达控制系统、起重机
CN105384091A (zh) 带有多级独立伸缩油缸的伸缩臂结构及起重机
CN108775431A (zh) 平衡阀
CN102996570B (zh) 单作用双级液压缸和工程机械
JP2015158258A (ja) 複動型流体圧シリンダ
CN103867747B (zh) 一种多级流量增益的二通比例插装阀
CN212337777U (zh) 一种多级液压缸
CN102330714B (zh) 负载反馈控制阀
CN211599147U (zh) 一种带液控单向阀的顺序油缸
CN110778555B (zh) 一种嵌入式压力补偿阀杆
CN112081794A (zh) 一种多级液压缸
WO2013099642A1 (fr) Cylindre à pression de fluide
CN104295547B (zh) 液压控制回路和工程机械

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12847076

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12847076

Country of ref document: EP

Kind code of ref document: A1