EP0087816A1 - Dispositif de levage hydraulique - Google Patents

Dispositif de levage hydraulique Download PDF

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Publication number
EP0087816A1
EP0087816A1 EP83102029A EP83102029A EP0087816A1 EP 0087816 A1 EP0087816 A1 EP 0087816A1 EP 83102029 A EP83102029 A EP 83102029A EP 83102029 A EP83102029 A EP 83102029A EP 0087816 A1 EP0087816 A1 EP 0087816A1
Authority
EP
European Patent Office
Prior art keywords
chamber
lifting device
gear pump
piston
electric motor
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.)
Granted
Application number
EP83102029A
Other languages
German (de)
English (en)
Other versions
EP0087816B1 (fr
Inventor
Jesus Iciz Arbeloa
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.)
Individual
Original Assignee
Individual
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
Priority claimed from ES1982263602U external-priority patent/ES263602Y/es
Priority claimed from ES1983270376U external-priority patent/ES270376Y/es
Application filed by Individual filed Critical Individual
Priority to AT83102029T priority Critical patent/ATE24875T1/de
Publication of EP0087816A1 publication Critical patent/EP0087816A1/fr
Application granted granted Critical
Publication of EP0087816B1 publication Critical patent/EP0087816B1/fr
Expired 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
    • 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
    • B66F3/44—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with self-contained electric driving motors

Definitions

  • the invention relates to a hydraulic lifting device with a cylindrical chamber provided vertically therein, in which a piston acting as the actual lifting element is slidably arranged.
  • Such a lifting device serves to lift heavy loads and hold them at a certain height.
  • this lifting device is suitable for lifting all types of loads, it has been developed in particular as a replacement for the conventional hydraulic or mechanical jacks for use in the vehicle sector.
  • the main object of the present invention is to eliminate the manual operation required in conventional hydraulic or mechanical jacks and to adapt the lifting device of the type mentioned in the introduction, in particular for the use of an in-vehicle battery as the drive source.
  • an electric motor preferably designed as a direct current motor for an operating voltage of 12 volts
  • a gear pump which is intended for the delivery of oil from a supply container into the pressure chamber formed between the cylindrical chamber and the reciprocating piston
  • a Pinion of the gear pump is attached directly to the shaft of the electric motor
  • a second pinion is mechanically attached the first pinion is engaged and is freely rotatable, and that associated connecting lines are laid between the gear pump and the oil supply chamber to form a hydraulic drive system.
  • the lifting device proposed according to the invention thus has a hydraulic system for lifting and lowering the associated piston, the hydraulic system including a gear pump, which is preferably driven by a direct current electric motor which is designed for an operating voltage of 12 volts, that is to say the battery voltage.
  • the present invention is also intended to create a compact and high-performance lifting device, for which purpose the drive or lifting piston is designed in two parts, so that it can also be extended telescopically. This allows the total height of the device at rest, i.e. H. with retracted piston, despite the considerable stroke size, can be kept very small.
  • the lifting device has a frame or a mounting frame on which the pressure cylinder and the drive motor with the gear pump driven by it are constructed.
  • the oil container or the oil supply chamber could be arranged arbitrarily on the said frame, its or its installation is provided on the circumference of the pressure chamber in order to keep the device as small as possible with regard to the space requirement, with lines required in the frame between the two chambers and the gear pump can be relocated.
  • the pressure chamber is designed in two parts, so that a second chamber is formed within the main piston, in which a secondary piston slides. Both chambers are connected to each other by an opening and have pressure areas of different sizes so that the oil pressure first shifts the main piston and only then - after it has reached its extension limit - does the movement of the secondary piston begin.
  • the secondary piston is also provided with an axial bore, which is designed as a blind opening on the inside, open to the outside and provided with a thread there that is intended for the attachment of a threaded rod with a support head for the support of an object to be lifted, so that this rod can be used the maximum height of the lifting device and thus also its maximum operating height can be switched off in the extended state.
  • the line between the gear pump and the pressure chambers could be provided with a valve, that this line would close after the lifting process and would prevent the flow of liquid in order to be able to maintain the lifting state, while a second valve in the return line to connect the pressure chamber with the oil supply chamber would allow the backflow of the liquid to lower the lifting device.
  • the lifting device is lowered via the gear pump itself, namely by reversing the direction of motor rotation.
  • the maintenance of the lifting device in its uppermost operating position is achieved by short-circuiting the motor pump, which creates a resistance to a rotary movement of the motor, which causes the gear pump pinion to become stuck or braked, i.e.
  • Another possibility of holding the lifting device in the working position is to interpose a pressure switch in the connecting line between the gear pump and the pressure chamber or pressure cylinder.
  • the pressure switch interrupts the electrical current to the motor when the pressure in the main chamber exceeds a preset value, and it causes the electric motor to be switched on again when the pressure is reduced by the backflow of oil via the gear pump.
  • the proposed electrohydraulic lifting device contains the following parts: a base frame 1, on which an electric drive motor 2 for a gear group 3 and the actual lifting device 4 are constructed separately.
  • the electric motor 2 is designed for direct current with an operating voltage of 12 volts so that an in-vehicle battery can be used as an energy source, since this lifting device is primarily intended for use in vehicles.
  • the shaft 5 of the motor 2 is connected via a suitable transmission connection to the axis 6 of a pump gear, namely the pinion provided with the reference number 3, which in turn is mechanically engaged with a secondary pinion 7, the axis 8 of which can rotate in block 9 parallel to the axis 6 is arranged.
  • This block supports the entire assembly and forms a tight receiving body for the bearing of the pump pinion.
  • a cylindrical body 10 forms, together with a main piston 11, a main pressure chamber 12, the piston having an axial extension in the form of a cylindrical body 13, which together with a secondary body 14 forms a secondary chamber 15, which through an axial opening 16 communicates with the head chamber 12 communicates.
  • the secondary piston 14 is provided with a bore 17 which is blind on the inside and open on the outside and there has a thread in which a threaded rod 18 is fastened with a correspondingly designed support head 19 which serves to support an object to be lifted.
  • a second cylindrical body 20 is arranged around the first cylindrical body 10; both bodies together form a chamber 21 for the oil supply.
  • this chamber 21 is provided with a stopper 25, which is preferably made of porous sintered bronze material, which is air but not allows oil to flow freely.
  • the lines 23 for connecting the oil supply chamber 21 to the gear pump 3 and the main pressure chamber 12 are preferably laid within the frame 1.
  • the pressure area of the main piston is significantly larger than that of the secondary piston.
  • the oil supply chamber has sufficient capacity to feed the main and secondary chamber when the lifting device is at its maximum position where the cross sections correspond to S 1 of the secondary pressure chamber, S 2 of the main pressure chamber and S 3 of the oil supply chamber.
  • the base frame is extended in one piece upwards, namely in the form of a prismatic body in which the pressure chamber 12 'and a receptacle 27 for the gear pump 3-7 are formed.
  • This receptacle also serves as an oil supply chamber, and the electric motor 2 is also installed in this chamber, but is separated from this chamber 27 by means of a plate 28 which has a corresponding seal 29.
  • the prismatic body contains two further cavities 30 and 31 which are coaxial to the two aforementioned chambers, as can be seen in FIG. 4. They serve to supplement the oil supply function of the chamber 27.
  • only a single main piston 11 ' is provided, and the electric motor 2 only acts to move the piston upwards.
  • the block is closed from above with a cover 32 through which the rod 13 ', also provided with a support head 19, protrudes from the piston 11', wherein it has a side opening 33 for the insertion of the motor connection cable.
  • the oil is supplied from the chamber 31 through an opening 34 to the chamber 27 and is conveyed to the pressure chamber 12 'by means of the running gear pump 3-7 via the line 23'.
  • a one-way valve which can be installed in a collector 35, the outermost working or. Stroke position of the rod 13 'determined by a line 36 which is located in the upper region of the chamber formed by the cylindrical body 10'.
  • this line is run over by the piston 11 ', it is released for operation and leaves the oil in Drain freely in the direction of the secondary chamber 30. From here, the oil flows back into the chamber 27 via the lower opening or line 37.
  • a return valve 38 which is shown in detail in FIG. 6, is opened by hand and a connection is established between the collector 21 and the line 39 for returning oil to the chamber 27, as shown in FIG 7 shows.
  • the oil supply therefore takes place from the oil supply contained in the chamber 27 itself and in the secondary chambers 30, 31.
  • the hydraulic oil flows via line 40 to collector 35 and from there via line 23 'to pressure chamber 12', in which piston 11 'is then displaced or displaced by the oil. If you want to move the piston in the opposite direction, i. H. bring it back to its lower position, this is sufficient by manual actuation of the valve 38 to establish a connection between the chambers 12 'and 27 via the line 23', the collector 35 and the line 39.
  • the oil then flows back through the various feed chambers and the piston sinks due to the weight.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Actuator (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Reciprocating Pumps (AREA)
  • Forklifts And Lifting Vehicles (AREA)
EP83102029A 1982-03-02 1983-03-02 Dispositif de levage hydraulique Expired EP0087816B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83102029T ATE24875T1 (de) 1982-03-02 1983-03-02 Hydraulische hubvorrichtung.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ES263602U 1982-03-02
ES1982263602U ES263602Y (es) 1982-03-02 1982-03-02 Gato electrohidraulico.
ES270376U 1983-02-16
ES1983270376U ES270376Y (es) 1983-02-16 1983-02-16 Nuevo gato electrohidraulico.

Publications (2)

Publication Number Publication Date
EP0087816A1 true EP0087816A1 (fr) 1983-09-07
EP0087816B1 EP0087816B1 (fr) 1987-01-14

Family

ID=26155503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102029A Expired EP0087816B1 (fr) 1982-03-02 1983-03-02 Dispositif de levage hydraulique

Country Status (6)

Country Link
US (1) US4667932A (fr)
EP (1) EP0087816B1 (fr)
BR (1) BR8300997A (fr)
CA (1) CA1202614A (fr)
DE (1) DE3369109D1 (fr)
MX (1) MX152865A (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2743047B1 (fr) * 1995-12-27 1998-02-20 Renault Vehicules Ind Dispositif de basculement d'une cabine supportee par un chassis
DE10106714A1 (de) * 2001-02-14 2002-08-22 Bosch Gmbh Robert Hubzylindereinheit
US6719099B2 (en) 2002-05-13 2004-04-13 Inventio Ag Integral elevator hydraulic power unit
ITRM20030007A1 (it) * 2003-01-10 2004-07-11 Otis Elevator Co Dispositivo di sollevamento a pistone, in particolare
DE202005005598U1 (de) * 2005-04-08 2005-06-09 Atrium Enterprises Gmbh Hubeinheit
US20090045380A1 (en) * 2007-08-13 2009-02-19 Mark Aiken Lift stand
US9073516B2 (en) * 2009-01-22 2015-07-07 Lippert Components Manufacturing Inc. Leveling jack for vehicle
EP2343223B1 (fr) * 2010-01-06 2016-05-04 Lippert Components Manufacturing, Inc. Système de mise à niveau pour véhicule
US8925990B2 (en) 2011-10-26 2015-01-06 Lippert Components Manufacturing, Inc. Slide-out room system having wall-mounted drive mechanisms with brake
US8991890B2 (en) 2011-10-26 2015-03-31 Lippert Components Manufacturing, Inc. Slide-out room system having wall-mounted drive mechanisms
CN103072920A (zh) * 2013-01-05 2013-05-01 常熟通润汽车零部件股份有限公司 承载及运送车辆部件的油压升降设备
US10336584B2 (en) 2015-02-24 2019-07-02 Larry R. DeBattiste Lifting and transporting system
CN109437040A (zh) * 2018-12-27 2019-03-08 宁波市奉化区南方机械制造有限公司 一种齿轮式液压千斤顶
CN109775603A (zh) * 2019-03-25 2019-05-21 南通科技职业学院 便携式汽车液压千斤顶
CN113148892A (zh) * 2021-05-13 2021-07-23 上海航空机械有限公司 电动液压千斤顶及同步升降控制系统

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1353244A (en) * 1917-06-18 1920-09-21 Cora A Joerns Hydraulic hoist
US1690181A (en) * 1924-05-12 1928-11-06 American Hoist & Derrick Co Hydraulic hoist
GB322588A (en) * 1928-10-15 1929-12-12 Tangyes Ltd Improvements in telescopic lifting-jacks
US1858117A (en) * 1930-06-16 1932-05-10 Siepp Fred Piston operated snap switch
US1969408A (en) * 1932-02-01 1934-08-07 Beece Corp Inc Car lifting device
US2034605A (en) * 1935-05-13 1936-03-17 Carman Clifford Hydraulic jack
US2293071A (en) * 1940-08-03 1942-08-18 Jr Otto Morgensen Multiple ram hydraulic jack
US2364741A (en) * 1942-11-26 1944-12-12 St Paul Hydraulic Hoist Compan Telescopic jack structure
FR920424A (fr) * 1945-10-01 1947-04-08 Vérin hydro-électrique
FR1134942A (fr) * 1955-10-25 1957-04-19 Cie Gen Equip Aeronautique Transformateur de mouvement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1546997A (en) * 1924-04-26 1925-07-21 William A Reschke Motor-driven portable oil-transfer pump
US2333530A (en) * 1942-04-25 1943-11-02 Hydraulic Dev Corp Inc Hydraulic system
DE932157C (de) * 1946-04-18 1955-08-25 Jean Louis Gratzmuller Hydraulische Hebevorrichtung
US2485240A (en) * 1946-06-10 1949-10-18 Carlton L Jackson Reversible variable-speed rotary pump and motor hydraulic transmission
US3022901A (en) * 1958-09-29 1962-02-27 James L Fisher Hoist for microphone dolly and the like

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1353244A (en) * 1917-06-18 1920-09-21 Cora A Joerns Hydraulic hoist
US1690181A (en) * 1924-05-12 1928-11-06 American Hoist & Derrick Co Hydraulic hoist
GB322588A (en) * 1928-10-15 1929-12-12 Tangyes Ltd Improvements in telescopic lifting-jacks
US1858117A (en) * 1930-06-16 1932-05-10 Siepp Fred Piston operated snap switch
US1969408A (en) * 1932-02-01 1934-08-07 Beece Corp Inc Car lifting device
US2034605A (en) * 1935-05-13 1936-03-17 Carman Clifford Hydraulic jack
US2293071A (en) * 1940-08-03 1942-08-18 Jr Otto Morgensen Multiple ram hydraulic jack
US2364741A (en) * 1942-11-26 1944-12-12 St Paul Hydraulic Hoist Compan Telescopic jack structure
FR920424A (fr) * 1945-10-01 1947-04-08 Vérin hydro-électrique
FR1134942A (fr) * 1955-10-25 1957-04-19 Cie Gen Equip Aeronautique Transformateur de mouvement

Also Published As

Publication number Publication date
MX152865A (es) 1986-06-23
DE3369109D1 (en) 1987-02-19
EP0087816B1 (fr) 1987-01-14
US4667932A (en) 1987-05-26
CA1202614A (fr) 1986-04-01
BR8300997A (pt) 1983-11-16

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