EP1316733A1 - Hydraulic piston-cylinder unit - Google Patents

Hydraulic piston-cylinder unit Download PDF

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Publication number
EP1316733A1
EP1316733A1 EP02021134A EP02021134A EP1316733A1 EP 1316733 A1 EP1316733 A1 EP 1316733A1 EP 02021134 A EP02021134 A EP 02021134A EP 02021134 A EP02021134 A EP 02021134A EP 1316733 A1 EP1316733 A1 EP 1316733A1
Authority
EP
European Patent Office
Prior art keywords
piston
chamber
cylinder unit
hydraulic piston
solenoid 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.)
Withdrawn
Application number
EP02021134A
Other languages
German (de)
English (en)
French (fr)
Inventor
Sergio Dallan
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.)
Simeoni Srl
Original Assignee
Simeoni Srl
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 Simeoni Srl filed Critical Simeoni Srl
Publication of EP1316733A1 publication Critical patent/EP1316733A1/en
Withdrawn legal-status Critical Current

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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
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1428—Cylinders
    • 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
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1438—Cylinder to end cap assemblies
    • 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
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • 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
    • F15B15/202—Externally-operated valves mounted in or on the actuator

Definitions

  • This invention relates to an improved hydraulic piston-cylinder unit.
  • Double-acting hydraulic piston-cylinder units are known in which the oil is fed alternately upstream and downstream of the cylinder by a solenoid valve interposed between the hydraulic control unit and the piston-cylinder unit.
  • piston-cylinder units generally incorporate a body in which a substantially cylindrical chamber is provided housing the piston, which emerges via its piston rod at one end of said chamber.
  • the chamber is closed at the other end by a closure plug.
  • the piston is generally divided into two parts, namely the piston rod and the head, the shape of this latter generally resulting in eccentricity between the axis of the head guides and the piston rod sliding axis.
  • This two-component shape also has the further drawback of a body subjected to different mechanical and thermal stresses.
  • a further drawback of these piston-cylinder units consists of a substantial difficulty in forming the seats housing the gaskets and guides for the piston rod as these seats have to be milled on account of the parallelepiped shape of the body.
  • Another drawback consists of the fact that as the valve is not in contact with the body of the cylinder, the piston stroke is insufficient to enable the oil contained in the connection pipes to be replaced with "fresh" oil originating from the control unit.
  • an improved hydraulic piston-cylinder unit characterised by consisting of a parallelepiped body containing a cylindrical chamber obtained by milling, said chamber housing a piston formed in one piece, its piston rod emerging through a plug formed by lathe turning and engaged at a threaded circumferential portion thereof with a corresponding threaded portion provided on the circumferential surface of the chamber, a four-way two-position solenoid valve being in contact with the parallelepiped body.
  • the hydraulic piston-cylinder unit of the invention comprises substantially a parallelepiped body 2 in which a seat 4 is provided for housing a piston 6, the head of which defines two chambers 10, 12 respectively.
  • the chamber 10 hereinafter called the upstream or upper chamber, is the chamber which does not contain the piston rod 14 whereas the chamber 12, hereinafter called the downstream or lower chamber, is the chamber which contains the piston rod 14.
  • a threaded aperture 16 for inserting the pressurized oil delivery pipe this aperture communicating with a conduit 18 connected to an inlet hole 20 of a four-way two-position solenoid valve 22 applied against the hydraulic piston-cylinder unit.
  • the solenoid valve 22 also presents an outlet hole 24 connected to a conduit 26 provided within the body and communicating with a threaded aperture 30 through which oil discharges to the control unit.
  • the solenoid valve also presents two outlets/inlets 32, 34 communicating respectively with two conduits 36, 38 provided within the body, the conduit 36 feeding the upstream chamber 10 of the cylinder and the conduit 38 feeding the downstream chamber 12 of the cylinder.
  • the hydraulic piston-cylinder unit is formed in three parts, namely:
  • the hydraulic piston-cylinder unit is assembled in the following manner:
  • the operation of the piston-cylinder unit is traditional in that for one position of the solenoid valve (see Figure 3) the oil enters through the aperture 16, passes through the conduit 18, enters the solenoid valve through the hole 20, leaves through the conduit 34, enters the conduit 38 and feeds the downstream chamber 13 containing the piston rod.
  • conduit 20 is connected to the conduit 36 and the conduit 38 is connected to the conduit 26 so that oil flows into that chamber 10 not containing the piston rod.
EP02021134A 2001-11-30 2002-09-23 Hydraulic piston-cylinder unit Withdrawn EP1316733A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVE20010021 2001-11-30
ITVE20010021 ITVE20010021U1 (it) 2001-11-30 2001-11-30 "martinetto idraulico perfezionato"

Publications (1)

Publication Number Publication Date
EP1316733A1 true EP1316733A1 (en) 2003-06-04

Family

ID=11461069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02021134A Withdrawn EP1316733A1 (en) 2001-11-30 2002-09-23 Hydraulic piston-cylinder unit

Country Status (2)

Country Link
EP (1) EP1316733A1 (it)
IT (1) ITVE20010021U1 (it)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006018330A1 (de) 2004-08-17 2006-02-23 Hydraulik-Ring Gmbh Nockenwellenverstellsystem
WO2006123014A1 (en) * 2005-05-20 2006-11-23 Metso Paper, Inc. An actuator means to accomplish a linear movement
DE102007004615A1 (de) * 2007-01-30 2008-07-31 Robert Bosch Gmbh Hydrozylinder
CN102192212A (zh) * 2010-03-19 2011-09-21 顾元媛 一种双级行程单推杆液压推动器的活塞缸筒
CN103216484A (zh) * 2013-04-09 2013-07-24 西安交通大学 一种油箱置于上横梁液压机的下横梁内活塞缸结构
IT201700069453A1 (it) * 2017-06-22 2018-12-22 Vega S R L Attuatore a fluido per stampi.
CN109973461A (zh) * 2019-04-08 2019-07-05 江西资生科技有限公司 一种防爆液压执行机构
TWI812555B (zh) * 2022-11-30 2023-08-11 臻賞工業股份有限公司 電磁閥嵌入式動力缸

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3608438A (en) * 1968-05-13 1971-09-28 Tomco Inc Rectangular body ram
DE3817259A1 (de) * 1988-05-20 1989-11-23 Audi Ag Verfahren und vorrichtung zum bearbeiten von bohrungen
DE29818075U1 (de) * 1998-10-09 1998-12-24 Kuhnke Gmbh Kg H Fluidischer Aktuator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3608438A (en) * 1968-05-13 1971-09-28 Tomco Inc Rectangular body ram
DE3817259A1 (de) * 1988-05-20 1989-11-23 Audi Ag Verfahren und vorrichtung zum bearbeiten von bohrungen
DE29818075U1 (de) * 1998-10-09 1998-12-24 Kuhnke Gmbh Kg H Fluidischer Aktuator

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004039800B4 (de) * 2004-08-17 2006-07-27 Hydraulik-Ring Gmbh Nockenwellenverstellsystem
WO2006018330A1 (de) 2004-08-17 2006-02-23 Hydraulik-Ring Gmbh Nockenwellenverstellsystem
WO2006123014A1 (en) * 2005-05-20 2006-11-23 Metso Paper, Inc. An actuator means to accomplish a linear movement
US7549370B2 (en) 2005-05-20 2009-06-23 Metso Paper, Inc. Actuator means to accomplish a linear movement
DE102007004615A1 (de) * 2007-01-30 2008-07-31 Robert Bosch Gmbh Hydrozylinder
CN102192212B (zh) * 2010-03-19 2016-01-27 顾元媛 一种双级行程单推杆电力液压推动器的活塞缸筒
CN102192212A (zh) * 2010-03-19 2011-09-21 顾元媛 一种双级行程单推杆液压推动器的活塞缸筒
CN103216484A (zh) * 2013-04-09 2013-07-24 西安交通大学 一种油箱置于上横梁液压机的下横梁内活塞缸结构
CN103216484B (zh) * 2013-04-09 2015-10-21 西安交通大学 一种油箱置于上横梁液压机的下横梁内活塞缸结构
IT201700069453A1 (it) * 2017-06-22 2018-12-22 Vega S R L Attuatore a fluido per stampi.
CN109973461A (zh) * 2019-04-08 2019-07-05 江西资生科技有限公司 一种防爆液压执行机构
CN109973461B (zh) * 2019-04-08 2020-08-04 江西资生科技有限公司 一种防爆液压执行机构
TWI812555B (zh) * 2022-11-30 2023-08-11 臻賞工業股份有限公司 電磁閥嵌入式動力缸

Also Published As

Publication number Publication date
ITVE20010021U1 (it) 2003-05-30

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