EP0685302A1 - Agrégat d'outil avec un outil à main et une pompe hydraulique portable - Google Patents

Agrégat d'outil avec un outil à main et une pompe hydraulique portable Download PDF

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Publication number
EP0685302A1
EP0685302A1 EP95108149A EP95108149A EP0685302A1 EP 0685302 A1 EP0685302 A1 EP 0685302A1 EP 95108149 A EP95108149 A EP 95108149A EP 95108149 A EP95108149 A EP 95108149A EP 0685302 A1 EP0685302 A1 EP 0685302A1
Authority
EP
European Patent Office
Prior art keywords
tool
hydraulic pump
hand tool
control switch
line
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
EP95108149A
Other languages
German (de)
English (en)
Other versions
EP0685302B1 (fr
Inventor
Gerhard Hellebrandt
Thilo Weber
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.)
Rothenberger Werkzeuge AG
Original Assignee
Rothenberger Werkzeugemaschinen GmbH
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 DE4446502A external-priority patent/DE4446502A1/de
Application filed by Rothenberger Werkzeugemaschinen GmbH filed Critical Rothenberger Werkzeugemaschinen GmbH
Publication of EP0685302A1 publication Critical patent/EP0685302A1/fr
Application granted granted Critical
Publication of EP0685302B1 publication Critical patent/EP0685302B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/146—Clip clamping hand tools
    • 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
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/12—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears
    • B25B7/126—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears with fluid drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/005—Hydraulic driving means

Definitions

  • the invention relates to a tool assembly consisting of a hand tool with a built-in hydraulic drive and a portable, electrically connected hydraulic pump connected to the hand tool via a pressure hose with a control switch connected via a control line.
  • a hand tool of the type described above, but without a control switch and control line and only with a connection for a pressure hose is known from DE-PS 21 36 742. This known tool can only be used with an external control switch.
  • a portable, battery-operated hydraulic pump is known from the "WALKPAC" brochure from Enerpac Applied Power GmbH in Düsseldorf, for which applications for driving tools are specified.
  • the case-like housing which has a handle and a shoulder strap, is connected to a control switch via a flexible cable so that the pump can be switched on and off by hand.
  • the switch operation proves to be useful for a number of hand tools as extremely difficult, which must be held with both hands, be it because of the high weight, because of the precise use of tools with regard to the workpiece, or because of the need to carry out further manipulations on the hand tool itself.
  • the known hydraulic pump would make the so-called "third hand" necessary for such hand tools.
  • the hand tools described above include, for example, pressing tongs and disk tongs, which are used to connect pipe ends with the interposition of coupling pieces, which consist of a sleeve and two sleeve-shaped parts, between which the pipe ends must be positively and absolutely tight.
  • coupling pieces which consist of a sleeve and two sleeve-shaped parts, between which the pipe ends must be positively and absolutely tight.
  • ready-made coupling units have been developed, which can be divided into two groups.
  • connection In the first group, two pipe ends that have been pushed onto a sleeve are fixed by radially pressing deformable sleeves. In the second group, two pipe ends fixed on a sleeve are connected to one another by axially pushing on sleeves of a correspondingly small diameter. In both cases, the connection must be reliable and permanent against tensile and compressive loads, in particular the line connections must be made absolutely tight. Depending on the type of connection, one speaks of pressing tools or pushing tools or pressing tongs and pushing pliers. Metal, such as copper, for example, may very well be used as the material for the piping. An important area of application is the production of heating systems, especially underfloor heating.
  • the axis of the pliers jaw or the direction of movement of the sliding jaws must coincide with the axis of the line connection.
  • the longitudinal axis of the hand tool must be aligned exactly at right angles to the axis of the line connection and held in this position for the duration of the pressing or sliding process.
  • the hand tools in question are relatively heavy, and in the so-called pressing tongs the two jaws have to be opened by hand to place the pressing jaws on the line connection, because such pressing tongs only have a one-way drive. This peculiarity will be discussed in more detail in connection with the detailed description.
  • the invention is therefore based on the object of specifying a tool assembly of the type described at the outset, in which the hand tool can be held reliably and fatigue-free with both hands before, during and after the machining process, so that a precise use of tools is made possible.
  • control switch is structurally combined with the hand tool.
  • This unit of control switch and hand tool ensures that the operator does not have to first look for a control switch lying around or hanging around, but instead finds it in the grip area of the hand tool itself.
  • the hydraulic hand tool is therefore not only connected to the hydraulic pump and its control devices via a pressure hose, but also via a control line.
  • the operator can not only carefully and precisely guide the tool with regard to the required work process and over the Also keep the duration of the work process, but continue to carry out further manipulations on the tool itself, should this be necessary for certain tool types. Handling is also largely fatigue-free, although most hydraulically driven tools have a considerable weight.
  • the hand tool has at least one gripping surface and if the control switch is integrated into the hand tool in the vicinity of the gripping surface in such a way that it can be actuated without releasing the gripping surface.
  • hydraulic pump its electric drive motor and a rechargeable power source are installed in a portable housing which is provided with holding devices for fastening on the back of an operator.
  • the hydraulic drive is designed in such a way that the pressing process ends in a maximum of 6 seconds, preferably in a maximum of 4 seconds, depending on the pressure and degree of delivery of the portable hydraulic pump which can be driven by a rechargeable power source and the deformation properties of the line connection is.
  • the tool assembly consists of a hand tool 1 and a portable housing 2, in which a rechargeable power source 3, a pump sump 4, a hydraulic pump 5 and an electric motor 6 for driving it are arranged.
  • the electric motor 6 is fed by the current source 3 with appropriate control.
  • the housing 2 is provided on its one end face with a connecting piece 7 for a coupling 8 of a pressure hose 9 and with a plug connection 10 for connecting a coupling 11 of a control line 12.
  • the housing 2 has a handle 13 and holding devices, not shown here, for fastening on the back of an operator.
  • the hand tool 1 consists of a so-called basic device 14 and a tool head 15 which can be exchangeably fastened to it.
  • the basic device 14 includes a housing 16 with a handle 17, which forms a gripping surface 18 on its circumference. In the immediate vicinity of this gripping surface 18, an electrical control switch 19 is arranged in the housing 16, which is connected to the control line 12.
  • a gland screw connection 20 is used for the moisture-tight passage of the control line 12.
  • a hydraulic drive 21 which consists of a hydraulic cylinder 22 with a piston 23, piston rings 24 and a piston rod 25.
  • the hydraulic cylinder 22 is screwed into the housing 16 and fixed by a lock nut 26.
  • a compression spring 27 which is guided partly by the piston rod 25 and partly by a guide sleeve 28.
  • an intermediate piece 29 with a flange part 30 is further screwed, which carries a bearing ring 31 for the piston rod 25 in a coaxial bore.
  • the aforementioned tool head 15 is connected to said flange part 30 via a plurality of screws 32, only one of which is visible which includes a press jaw housing 33 which is provided with a further flange part 34. Inside the press jaw housing 33 there is a cross head 35 with two control rollers 36, of which only the upper one is visible due to the selected cut. The two control rollers are mounted on parallel pins 37, the ends of which are in turn fixed in the crosshead 35.
  • the crosshead 35 is connected to the piston rod 25 in the manner shown and is driven by it.
  • the press jaw housing 33 consists of two shell-shaped halves which are held together by a screw 38.
  • the press jaw housing 33 is fork-shaped and provided with a diametrically continuous recess 39 into which two double-armed press jaws 40 and 41 partially protrude.
  • the press jaws 40 and 41 are mounted on two parallel pivot pins 42 and 43 and are held in the stable position shown by a compression spring 44.
  • the pivot pins 42 and 43 are mounted at the end of the press jaw housing 33.
  • a jaw 45 is formed between the press jaws 40 and 41, which is used for the radial pressing of so-called line connectors.
  • the legs of the pressing jaws 40 and 41 on this side have further gripping surfaces 46 and 47 by means of which the pressing jaws 40 and 41 can be pressed further into the recess 39 by hand.
  • the gripping surfaces 46 and 47 are relieved, so that the previously compressed compression spring 44 closes the pliers mouth 45 as far as the line connector therein with the line ends permits.
  • control switch 19 is now actuated, which sets the hydraulic pump 5 into operation via the control line 12, so that the piston 23 is pressurized via the pressure hose 9 and displaced to the right.
  • This piston movement is followed by the control rollers 36, which in this case run onto two control surfaces 48, only the upper one is visible.
  • the control surfaces 48 have the effect of inclined planes with respect to the tool axis AA, ie under the action of the control rollers 36 and the control surfaces 48 the forceps jaw 45 is closed with great force and the pressing process is carried out.
  • the outer surface of the press jaw housing 33 serves as a further gripping surface in order to be able to hold the tool reliably in the selected position. In other words: the operator has both hands on the hand tool 1.
  • the pressing jaws 40 and 41 can be exchanged together with the pivot pins 42 and 43 as a structural unit and are held in the pressing jaw housing 33 by means of a tab 49 and a cylindrical pin 50 for this purpose. After loosening the cylindrical pin 50, it is possible in a simple manner to replace the outer part of the tool head 15 and to replace it by a set of press jaws with a jaw 45 with different diameters or differently shaped press surfaces.
  • the tool assembly according to the invention is an easily transportable implement with which line connections can be made reliably, quickly and in a manner which saves energy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Harvester Elements (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
EP95108149A 1994-06-03 1995-05-29 Agrégat d'outil avec un outil à main et une pompe hydraulique portable Expired - Lifetime EP0685302B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE9409051U 1994-06-03
DE9409051 1994-06-03
DE4446502 1994-12-25
DE4446502A DE4446502A1 (de) 1994-06-03 1994-12-25 Werkzeugaggregat mit Handwerkzeug und tragbarer Hydraulikpumpe

Publications (2)

Publication Number Publication Date
EP0685302A1 true EP0685302A1 (fr) 1995-12-06
EP0685302B1 EP0685302B1 (fr) 1998-08-12

Family

ID=25943312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95108149A Expired - Lifetime EP0685302B1 (fr) 1994-06-03 1995-05-29 Agrégat d'outil avec un outil à main et une pompe hydraulique portable

Country Status (2)

Country Link
EP (1) EP0685302B1 (fr)
AT (1) ATE169546T1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2186606A2 (fr) * 2008-11-12 2010-05-19 Interprecise Donath Gmbh Dispositif d'adaptateur pour une presse tubulaire
US11925253B2 (en) 2018-07-31 2024-03-12 Wacker Neuson Produktion Gmbh & Co Kg Wearable drive system for a work apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1075857A (en) * 1963-12-13 1967-07-12 Burndept Ltd Battery operated mechanical power unit
DE2136742A1 (de) 1971-07-15 1973-02-08 Mo Stankostroitelnyj Sawod Kra Senkrechtmehrspindelwerkzeugmaschine
US5022587A (en) * 1989-06-07 1991-06-11 Hochstein Peter A Battery powered nebulizer
US5125324A (en) * 1988-02-10 1992-06-30 Daia Industry Co. Ltd. Portable hydraulically operated device incorporating automatic drain valve
DE4207764A1 (de) * 1992-03-11 1993-09-16 Hugo Junkers Werke Gmbh Hydraulik-werkzeug
DE4423049A1 (de) * 1994-07-03 1995-01-19 Lai Xiao Wei Eine zentralbolzenförmige (und konzentrisch doppelkolbenförmige) gleichzeitig zieh- und druckfähige Mehrleistungs- und Mehrzweckhydraulik als Handwerkzeug

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1075857A (en) * 1963-12-13 1967-07-12 Burndept Ltd Battery operated mechanical power unit
DE2136742A1 (de) 1971-07-15 1973-02-08 Mo Stankostroitelnyj Sawod Kra Senkrechtmehrspindelwerkzeugmaschine
US5125324A (en) * 1988-02-10 1992-06-30 Daia Industry Co. Ltd. Portable hydraulically operated device incorporating automatic drain valve
US5022587A (en) * 1989-06-07 1991-06-11 Hochstein Peter A Battery powered nebulizer
DE4207764A1 (de) * 1992-03-11 1993-09-16 Hugo Junkers Werke Gmbh Hydraulik-werkzeug
DE4423049A1 (de) * 1994-07-03 1995-01-19 Lai Xiao Wei Eine zentralbolzenförmige (und konzentrisch doppelkolbenförmige) gleichzeitig zieh- und druckfähige Mehrleistungs- und Mehrzweckhydraulik als Handwerkzeug

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2186606A2 (fr) * 2008-11-12 2010-05-19 Interprecise Donath Gmbh Dispositif d'adaptateur pour une presse tubulaire
DE102008057424A1 (de) 2008-11-12 2010-05-27 Interprecise Donath Gmbh Vorsatzvorrichtung für eine Rohrpressmaschine
DE102008057424B4 (de) * 2008-11-12 2010-09-02 Interprecise Donath Gmbh Vorsatzvorrichtung für eine Rohrpressmaschine
EP2186606A3 (fr) * 2008-11-12 2012-04-25 INTERPRECISE Donath GmbH Dispositif d'adaptateur pour une presse tubulaire
US11925253B2 (en) 2018-07-31 2024-03-12 Wacker Neuson Produktion Gmbh & Co Kg Wearable drive system for a work apparatus

Also Published As

Publication number Publication date
ATE169546T1 (de) 1998-08-15
EP0685302B1 (fr) 1998-08-12

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