EP2333335A1 - Groupe de pompes hydrauliques portatif pour le fonctionnement d'outils - Google Patents

Groupe de pompes hydrauliques portatif pour le fonctionnement d'outils Download PDF

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Publication number
EP2333335A1
EP2333335A1 EP10014964A EP10014964A EP2333335A1 EP 2333335 A1 EP2333335 A1 EP 2333335A1 EP 10014964 A EP10014964 A EP 10014964A EP 10014964 A EP10014964 A EP 10014964A EP 2333335 A1 EP2333335 A1 EP 2333335A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
valve
oil
tool
pump
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
EP10014964A
Other languages
German (de)
English (en)
Other versions
EP2333335B1 (fr
Inventor
Arnold Reichegger
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.)
Intercable SRL
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Intercable SRL
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Publication of EP2333335A1 publication Critical patent/EP2333335A1/fr
Application granted granted Critical
Publication of EP2333335B1 publication Critical patent/EP2333335B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B3/00—Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage
    • F04B3/003—Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage with two or more pistons reciprocating one within another, e.g. one piston forning cylinder of the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B25/00—Multi-stage pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B5/00—Machines or pumps with differential-surface pistons

Definitions

  • the invention relates to a hydraulic pump group of the compact portable type which is operated by a rechargeable and replaceable battery to drive different, connected via a hose to the pump, hydraulic tools;
  • the control of the pump is done by means of rotary and / or push buttons which are provided on the pump itself or by remote control with push button panel and electrical connection cable.
  • These pumps are usually equipped with a built-in battery charger, with a tank for the oil and a display to indicate the parameters entered for operating the pump, for displaying the operating values and / or operating diagrams, reporting malfunctions or work irregularities and displaying various set or user-entered work programs.
  • the pump groups of this type feed the cylinder of the tool for power stroke with oil under low pressure but high throughput to achieve rapid movement of the tool, for the movement which takes place after contact of the tool with the material to be compressed, deformed or cut, the supply is under high pressure.
  • a valve for the return of the oil from the cylinder of the tool is provided in the tank, which has a relatively small flow area for which there is no change, which has relatively long opening times brings. This negatively affects working hours, especially when a relatively large stroke tool is used to make cuts or deformations on workpieces which will have a relatively small cross-section.
  • the known pump groups have the disadvantage that they do not allow the stepless change in the pressure in the tool cylinder during the working phase, which would be advantageous, for example, for the consideration of cold flow, or the Walkens, the material to be processed.
  • the invention has as its object to create a pump group of the type described above which makes it possible to achieve short working times and to adapt the working phase to the properties dictated by cold flow, or by walking, of the material to be processed.
  • the invention proposes the use of a reflux valve which, be it manually or by means of an electric motor, is actuated, the flow cross-section of the valve, in the open position is relatively large to a rapid outflow of the oil from the tool cylinder and thus very short opening times to reach for the tool.
  • said flow cross-section is variable such that the same valve can also be used as a valve for adjusting the pressure and working times during the supply of the tool cylinder, which can be operated at low pressure and also at high pressure. This can be advantageous in order, in particular in the case of machining which take place by plastic deformation of certain materials, to be able to adapt the times, or the speed, of the deformation to the specific cold flow or rolling properties of the material.
  • the reflux valve according to the invention is provided with a closure body which is movable in the seat of the valve housing, the closure body is connected to a small piston which ends with a coaxial plunger on whose end an eccentric disc driven by a motor acts or which can be actuated manually.
  • the said small piston slides within a cylinder which is coaxially fixed to the valve body.
  • This cylinder is, in the area which corresponds to that end of the small piston which the valve closure body opposite, provided with a chamber which is hydraulically connected to the supply line of the tool cylinder. This causes the pressure acting on the closure body of the valve from the side of the incoming oil flowing through the inlet opening to be compensated by the same pressure of the oil which is directed into the chamber of the cylinder containing the small piston.
  • At least one tared safety valve, a pressure gauge and any, connected to the electronic control of the pump group, pressure and / or flow probes are provided in the circulation of the pump group of the invention.
  • the Fig. 1 shows a simplified functional diagram of the pump group according to the invention which is connected to the hydraulic cylinder of a tool, while the pump supplies the tool cylinder with oil under low pressure to achieve the rapid ejection of the tool piston.
  • the Fig. 2 shows the same in Fig. 1 illustrated functional diagram wherein the pump supplies the tool cylinder with oil under high pressure to reach the output of the tool piston.
  • Fig. 3 shows the same in Fig. 1 illustrated functional diagram wherein the reflux valve according to the invention is manually operated to achieve by the action of a spring, the return flow of the oil from the tool cylinder in the direction of the tank.
  • Fig. 4 shows the same in Fig. 1 illustrated functional diagram wherein the reflux valve according to the invention is actuated by a stepper motor operated eccentric disc to achieve a more or less rapid reflux of the oil from the tool cylinder in the direction of the tank.
  • the Fig. 5 shows the reflux valve according to the invention in a sectional view according to a vertical sectional plane which includes the vertical axis of the valve body and the horizontal axis of the eccentric disc for the actuation of the valve; the valve is shown in a position in which the flow is completely interrupted.
  • the Fig. 6 shows the same in Fig. 5 illustrated reflux valve, however, in partial sectional view according to the in Fig. 5 shown section plane VI-VL.
  • the pump group essentially consists of a pump P, an oil tank 1, intake valves V1, V2, an exhaust valve V3, a switching valve U, a return valve A and a tared safety valve S.
  • the pump group feeds the hydraulic cylinder 7 with piston 7a Tools which are connected by hydraulic hose to the pump group.
  • the pump P is a pump with stepped piston 3p, 6p and corresponding step cylinder 4p, 7p; the piston is moved in the direction C by a driven by an electric motor 2r eccentric 2 to generate pressure while being moved in the opposite direction to suck by cylindrical compression springs 5p, 8p.
  • the intake valves V1, V2 and also the exhaust valve V3 are of known type and ensure the required flow direction of the oil during the alternating suction and ejection movements C of the piston.
  • the switching valve U is of the type which is actuated by the oil pressure acting on a small piston U1, which is connected to the closure body of the valve U.
  • the pump P feeds the cylinder 7 of the tool, which is filled by the oil which is moved by the stepped piston 3p with a larger piston diameter.
  • a quick ejection 7c of the piston 7a of the tool is achieved, so that the time of free movement of the tool until its stop on the workpiece to be machined ( Fig.1 ) To shorten.
  • the invention proposes in front of the small cylinder 3a in which the small piston 2 a runs, to connect with the inlet / outlet line of the cylinder 7 of the tool c, it is achieved that the pressure acting on the closure body 1 x of the valve 1 a pressure is canceled by the pressure in the small cylinder 3 a on the small Piston 2a acts.
  • the manual operation of the return valve A is mainly in cases when, under special circumstances or for reasons of unforeseen circumstances or for safety reasons, an immediate opening of the tool must be made.
  • the reflux valve A is opened by electronic control by actuation 5r of an eccentric disk 5a which is driven by an electric motor B (FIG. Fig. 4 . 5) is driven, also in this case, in order to move 2s of the small piston 2a in the interior of the small cylinder 3a, a force is required which is slightly greater than the pressure of the spring which acts on the closure body 1 x of the valve 1a and as the friction between the small piston 2a and the corresponding cylinder 3a, this is because the pressure acting on the closure body 1x of the valve 1a is compensated by the pressure of the oil which flows into the small cylinder 3a a.
  • the reflux valve A according to the invention because of the above-mentioned pressure compensation, have a remarkable cross section for the flow of oil so that short times for the opening of the tools W, or high speeds for the retrieval 7r of the piston 7a can be achieved without high forces 1x are required for the operation of the closure body.
  • the displacement 2s of the plunger 4a together with small piston 2a and closure body 1x of the valve by progressive rotation 5r of the eccentric disk 5a can be carried out stepwise, whereby an extremely rapid emptying but also an optional change in the emptying speeds and thus the opening speed of the tools W is possible.
  • the invention allows the gradual opening of the reflux valve, including the possibility of continuous change in the flow cross section for the oil, also a change in pressure, or the times during the phase of supply under high pressure and low pressure.
  • the stepless manual operation 6b or the stepless operation by rotation 5r of the eccentric 5a of the plunger 4a together with small cylinder 2a and closure body 1x of the valve in the opening direction 2s achievable by the holder of the motor unit B together with eccentric 5a which carries a bearing 5k, together with mounted in a holder 2h bearings 2k, parallel to the axis of said plunger 4a parallel to the axis of said plunger 4a is displaceable.
  • the said support member 2h is displaceably guided on the outside of a pipe member 2m of the valve A mounted on the body of the pump P and the heads of the bolt 1g projecting in parallel from the body of the pump P in a position of maximum axial distance from the shutter body 1x of the valve which is determined by the pressure of, on the outside of said pin 1 g attached, cylindrical compression springs 1 f, retained.
  • manual actuation 6b for example by means of push button or lever 6a
  • the axial displacement of the support member 2h takes place together with the motor B together with the eccentric disc 5a by compressing the springs 1f, this results in the displacement of the plunger 2s 4a together Lock body 1x of the valve causing the opening of the same.
  • the invention does not exclude a fixed mounting of the motor B including eccentric disc, without sliding support member 2h and springs 1f and the manual operation 2s of the plunger 4a or the small piston 2a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Surgical Instruments (AREA)
EP10014964A 2009-12-02 2010-11-25 Groupe de pompes hydrauliques portatif pour le fonctionnement d'outils Active EP2333335B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBZ2009A000052A IT1397324B1 (it) 2009-12-02 2009-12-02 Gruppo pompa idraulica portatile per l'azionamento di attrezzi.

Publications (2)

Publication Number Publication Date
EP2333335A1 true EP2333335A1 (fr) 2011-06-15
EP2333335B1 EP2333335B1 (fr) 2012-10-31

Family

ID=42290134

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10014964A Active EP2333335B1 (fr) 2009-12-02 2010-11-25 Groupe de pompes hydrauliques portatif pour le fonctionnement d'outils

Country Status (2)

Country Link
EP (1) EP2333335B1 (fr)
IT (1) IT1397324B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3053705A4 (fr) * 2013-09-30 2017-06-14 Izumi Products Company Unité motorisée et outil électrique
EP3252361A1 (fr) 2016-06-03 2017-12-06 Intercable GmbH Module retour comprenant un clapet anti-retour à flotteur et commande électromagnétique
DE102017200212A1 (de) * 2017-01-09 2018-07-12 Hawe Hydraulik Se Zweistufenpumpe mit Umschaltventil
CN113027870A (zh) * 2021-03-17 2021-06-25 四川百纳科技有限责任公司 一种全地形装甲车独立散热系统及其控制方法
DE102017012400B3 (de) 2017-01-09 2022-06-09 Hawe Hydraulik Se Zweistufenpumpe mit Umschaltventil

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19801188A1 (de) * 1998-01-15 1999-07-22 Gaenslein Hans Guenther Fußpumpe zum Betrieb hydraulischer Werkzeuge, Zylinder o. dgl.
US20050265859A1 (en) * 2002-10-23 2005-12-01 Leif Hansen Fluid supply unit, in particular hydraulic supply unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19801188A1 (de) * 1998-01-15 1999-07-22 Gaenslein Hans Guenther Fußpumpe zum Betrieb hydraulischer Werkzeuge, Zylinder o. dgl.
US20050265859A1 (en) * 2002-10-23 2005-12-01 Leif Hansen Fluid supply unit, in particular hydraulic supply unit

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3053705A4 (fr) * 2013-09-30 2017-06-14 Izumi Products Company Unité motorisée et outil électrique
EP3252361A1 (fr) 2016-06-03 2017-12-06 Intercable GmbH Module retour comprenant un clapet anti-retour à flotteur et commande électromagnétique
DE102016110324A1 (de) 2016-06-03 2017-12-07 Intercable Gmbh Rücklaufbaugruppe mit einem schwimmenden Rücklaufventil und elektro-magnetischer Ansteuerung
DE102017200212A1 (de) * 2017-01-09 2018-07-12 Hawe Hydraulik Se Zweistufenpumpe mit Umschaltventil
US10851909B2 (en) 2017-01-09 2020-12-01 Hawe Hydraulik Se Dual-stage pump with switching valve
DE102017200212B4 (de) 2017-01-09 2021-12-16 Hawe Hydraulik Se Zweistufenpumpe mit Umschaltventil
DE102017012400B3 (de) 2017-01-09 2022-06-09 Hawe Hydraulik Se Zweistufenpumpe mit Umschaltventil
CN113027870A (zh) * 2021-03-17 2021-06-25 四川百纳科技有限责任公司 一种全地形装甲车独立散热系统及其控制方法

Also Published As

Publication number Publication date
IT1397324B1 (it) 2013-01-10
ITBZ20090052A1 (it) 2011-06-03
EP2333335B1 (fr) 2012-10-31

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