EP1468956A1 - Vérin hydraulique avec un système de controle inférieur pour controler le débit de liquide hydraulique de vérin - Google Patents

Vérin hydraulique avec un système de controle inférieur pour controler le débit de liquide hydraulique de vérin Download PDF

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Publication number
EP1468956A1
EP1468956A1 EP03252363A EP03252363A EP1468956A1 EP 1468956 A1 EP1468956 A1 EP 1468956A1 EP 03252363 A EP03252363 A EP 03252363A EP 03252363 A EP03252363 A EP 03252363A EP 1468956 A1 EP1468956 A1 EP 1468956A1
Authority
EP
European Patent Office
Prior art keywords
oil
control system
lower control
lifting jack
chamber
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.)
Withdrawn
Application number
EP03252363A
Other languages
German (de)
English (en)
Inventor
Hsien-Pi Cheng
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 Fu Corp
Original Assignee
Shinn Fu Corp
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 Fu Corp filed Critical Shinn Fu Corp
Priority to EP03252363A priority Critical patent/EP1468956A1/fr
Publication of EP1468956A1 publication Critical patent/EP1468956A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/027—Check valves
    • 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

  • the present invention relates to a lower control system regulating the flow rate of lifting jack oil, more particularly to a mechanism that slows down oil flow under high oil hydraulic pressure and therefore achieve a slow and safe descending of a lifting jack.
  • the conventional mechanism of reverse oil flow of a lifting jack utilizes a reverse flow valve to control oil in an inner chamber flowing back to an outer chamber, so that the lifting arm of a lifting jack may descend, restoring its the initial state.
  • the conventional oil-reversing device cannot control the flow rate of lifting jack oil. Therefore, oil reversing under loading has a higher flow rate due to the high pressure in the inner oil chamber. As a consequence, the descending of the lifting arm of a lifting jack is swift under loading, which may endanger operational safety.
  • the present invention comprises an outer valve body, a steel ball, a spring, and a throttle body.
  • the throttle body has a tapered portion, formed at its front end, and at least one throttling slot way and one lateral slot way, formed respectively on the tapered portion and the circumferential wall thereof.
  • a reverse flow valve can lift the steel ball so that oil swiftly flows by the throttle body through the lateral slot ways to complete the reverse flow.
  • Fig. 1 is an exploded view of the present invention.
  • Fig. 2 is a cross-sectional view of a throttle body according to the present invention.
  • Fig. 3 is a top view of a throttle body according to the present invention.
  • Fig. 4 is a cross-sectional view of the present invention being installed between a reverse flow valve and an inner oil chamber of a lifting jack.
  • Fig. 5 is a cross-sectional view of the present invention when the reverse flow valve is closed.
  • Fig. 6 illustrates oil reversing when the present invention is in a loaded state.
  • Fig. 7 is an enlarged view illustrating the oil flow rate being restricted when the present invention is in a loaded state.
  • Fig. 8 illustrates oil reversing when the present invention is not loaded.
  • Fig. 9 is an enlarged view illustrating the oil flow rate being high when the present invention is not loaded.
  • the lower control system regulating the flow rate of lifting jack oil comprises an outer valve body 1, a steel ball 2, a spring 3, and a throttle body 4.
  • the outer valve body 1 is a hollow valve body in which a dividing portion 11 divides the interior into a front chamber 12 and a rear chamber 13.
  • a valve hole 14 is formed to connect both sides the dividing portion 11.
  • An oil lead 15 is formed through the wall of the front chamber 12 at a selected location.
  • the front chamber 12 receives a spring 51 and a reverse flow valve 5, whereas the rear chamber 13 receives in order a steel ball 2, a spring 3, a throttle body 4, and a retaining ring 6.
  • the steel ball 2 is used to close the valve hole 14.
  • One end of the spring 3 holds against the steel ball 2. and the other end thereof holds the throttle body 4.
  • the throttle body 4 has a tapered portion 41 formed at one end, a throttling slot way 411 and a lateral slot way 42 being formed on the tapered portion 41 and on the circumferential wall of the throttle body 4.
  • a locating pin 412 is formed on the top face of the tapered portion 41 for settling the spring 3.
  • a retaining ring 6 is inserted within the end opening of the rear chamber 13 of the outer valve body 1 for stopping the throttle body 4 from being ejected outwardly by the spring 3.
  • the lower control system regulating the flow rate of lifting jack oil is particularly suitable to be installed between the reverse flow valve 5 of a lifting jack 10 and an inner oil chamber 101.
  • the present invention serves as a mechanism to control the oil flow from the inner oil chamber 101. thereby the oil flows through the reverse flow valve to an outer oil chamber 102 in a slow and uniform manner. In this way, the lifting jack 10 descends at a gentle speed so that the operational safety is assured.
  • the outer valve body 1 just disclosed has a thread portion 16 and a polygon portion 17 formed on the outer wall of the front chamber 12 thereof, for being firmly integrated with the lifting jack 10.
  • the outer valve body 1 further contains one or more oil seal slots 18 for receiving oil seal components 19 in order to prevent oil leakage.
  • the above-mentioned reverse flow valve 5 has a lifting pin 52 formed at the front end thereof for opening the valve hole 14 by pushing the steel ball 2 away from the valve hole 14.
  • the reverse flow valve 5 of the lower control system regulating the flow rate of lifting jack oil according to the present invention is closed and oil reversing is not allowed.
  • the steel ball 2 holds against the valve hole 14 to prevent oil from flowing through the oil lead 15.
  • immense oil hydraulic pressure from the inner oil chamber 101 compresses the spring 3, leading to a close contact between the tapered portion 41 of the throttle body 4 and the corresponding inner wall of the outer valve body 1, as shown in Fig. 7.
  • oil flows from the inner oil chamber 101 to the outer oil chamber 102 only through the throttling slot ways 411 on the tapered portion 41 of the throttle body 4, and therefore the flow rate is restricted.
  • This regulation of oil flow effectively prevents the lifting jack 10 from fast descending, assuring a slow and uniform downward motion. This measure reduces the risks of structural damage and hazards to personnel.
  • Fig. 8 shows the operation of the lower control system regulating the flow rate of lifting jack oil when the jack is not loaded and undergoing oil reversing. Because of much less oil pressure exerting on the throttle body 4, the reverse flow valve 5 can eject the steel ball 2 and retreat the tapered portion 41 of the throttle body 4, making gap between the tapered portion 41 of the throttle body 4 and the corresponding inner wall of the outer valve body 1 more spacious, as shown in Fig. 9. Oil in this configuration can flow through the lateral slot ways 42 of the throttle body 4 in large amounts, leading to faster descending of the jack.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Safety Valves (AREA)
EP03252363A 2003-04-14 2003-04-14 Vérin hydraulique avec un système de controle inférieur pour controler le débit de liquide hydraulique de vérin Withdrawn EP1468956A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03252363A EP1468956A1 (fr) 2003-04-14 2003-04-14 Vérin hydraulique avec un système de controle inférieur pour controler le débit de liquide hydraulique de vérin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03252363A EP1468956A1 (fr) 2003-04-14 2003-04-14 Vérin hydraulique avec un système de controle inférieur pour controler le débit de liquide hydraulique de vérin

Publications (1)

Publication Number Publication Date
EP1468956A1 true EP1468956A1 (fr) 2004-10-20

Family

ID=32892986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03252363A Withdrawn EP1468956A1 (fr) 2003-04-14 2003-04-14 Vérin hydraulique avec un système de controle inférieur pour controler le débit de liquide hydraulique de vérin

Country Status (1)

Country Link
EP (1) EP1468956A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2888228A1 (fr) * 2005-07-08 2007-01-12 Rassant Ind S A S Soc Par Acti Dispositif de securite d'un cric hydraulique
WO2014188039A1 (fr) * 2013-05-20 2014-11-27 Melchor Gabilondo, S.A. Outil de levage de type bouteille
US20170036897A1 (en) * 2015-03-23 2017-02-09 Changshu Tongrun Auto Accessory Co., Ltd. Oil Return Mechanism
EP3095752A4 (fr) * 2015-03-23 2017-02-22 Changshu Tongrun Auto Accessory Co., Ltd. Structure de retour d'huile
CN108414348A (zh) * 2018-05-07 2018-08-17 绍兴文理学院 一种测验岩石用的真三轴试验系统及其实现方法
EP3816094A1 (fr) * 2019-11-04 2021-05-05 Shinn Fu Corporation Ensemble de soupape de retour d'huile avec commande d'étranglement à plusieurs étages

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1221097A (en) * 1968-07-16 1971-02-03 Bulgaro Ungarsko Drujestvo Int Improvements in or relating to hydraulic lifting units
US6035635A (en) * 1998-09-03 2000-03-14 Hung; Michael Hydraulic quick lifting unit of a jack

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1221097A (en) * 1968-07-16 1971-02-03 Bulgaro Ungarsko Drujestvo Int Improvements in or relating to hydraulic lifting units
US6035635A (en) * 1998-09-03 2000-03-14 Hung; Michael Hydraulic quick lifting unit of a jack

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2888228A1 (fr) * 2005-07-08 2007-01-12 Rassant Ind S A S Soc Par Acti Dispositif de securite d'un cric hydraulique
WO2007006940A2 (fr) * 2005-07-08 2007-01-18 Rassant Industries S.A.S. Dispositif de securite d'un cric hydraulique
WO2007006940A3 (fr) * 2005-07-08 2007-03-22 Rassant Ind S A S Dispositif de securite d'un cric hydraulique
WO2014188039A1 (fr) * 2013-05-20 2014-11-27 Melchor Gabilondo, S.A. Outil de levage de type bouteille
US9670040B2 (en) 2013-05-20 2017-06-06 Melchor Gabilondo, S.A. Bottle jack
US20170036897A1 (en) * 2015-03-23 2017-02-09 Changshu Tongrun Auto Accessory Co., Ltd. Oil Return Mechanism
EP3095752A4 (fr) * 2015-03-23 2017-02-22 Changshu Tongrun Auto Accessory Co., Ltd. Structure de retour d'huile
US9809431B2 (en) * 2015-03-23 2017-11-07 Changshu Tongrun Auto Accessory Co., Ltd. Oil return mechanism
CN108414348A (zh) * 2018-05-07 2018-08-17 绍兴文理学院 一种测验岩石用的真三轴试验系统及其实现方法
CN108414348B (zh) * 2018-05-07 2020-05-26 绍兴文理学院 一种测验岩石用的真三轴试验系统及其实现方法
EP3816094A1 (fr) * 2019-11-04 2021-05-05 Shinn Fu Corporation Ensemble de soupape de retour d'huile avec commande d'étranglement à plusieurs étages

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