EP0876880A2 - Appareil de forage et/ou percussion - Google Patents

Appareil de forage et/ou percussion Download PDF

Info

Publication number
EP0876880A2
EP0876880A2 EP98810142A EP98810142A EP0876880A2 EP 0876880 A2 EP0876880 A2 EP 0876880A2 EP 98810142 A EP98810142 A EP 98810142A EP 98810142 A EP98810142 A EP 98810142A EP 0876880 A2 EP0876880 A2 EP 0876880A2
Authority
EP
European Patent Office
Prior art keywords
guide tube
air
air passages
machining direction
piston
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
EP98810142A
Other languages
German (de)
English (en)
Other versions
EP0876880A3 (fr
EP0876880B1 (fr
Inventor
Jens Frenzel
Helmut Nussrainer
Reinhard Dr. Schulz
Hans-Werner Bongers-Ambrosius
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP0876880A2 publication Critical patent/EP0876880A2/fr
Publication of EP0876880A3 publication Critical patent/EP0876880A3/fr
Application granted granted Critical
Publication of EP0876880B1 publication Critical patent/EP0876880B1/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
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/005—Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface

Definitions

  • the invention relates to a drilling and / or chiseling device according to the preamble of Claim 1.
  • a chisel device which has a guide tube, in which a piston of a striking mechanism and one interacting with an anvil Rackets are axially displaceable. Between the piston and the racket the guide tube has several along one perpendicular to the machining direction radially extending air passages distributed over the circumference, those that can be axially reciprocated with respect to the guide tube Control bodies are covered.
  • the control body is designed in the form of a sleeve and surrounds the guide tube.
  • in the End region of the free end of the Control body has a plurality of radially extending ventilation openings, which in a plane perpendicular to the machining direction distributed over the circumference are.
  • the ventilation openings are arranged on the control body such that they are in Coverage with the air vents can be brought when there is a back and forth of the control body relative to the guide tube.
  • the cross-sectional area each ventilation hole corresponds essentially to half the cross-sectional area each air passage of the guide tube.
  • the device To work on a surface, the device must be pressed against it.
  • the device is supported by the chisel tool on the ground.
  • the pressing process is followed by a shift of the chisel tool, the striker and of the control body against the processing direction in relation to the device.
  • the control body occupies three different positions.
  • the control body is opposite before pressing the device against the ground the guide tube in the machining direction so far that the air passages are not closed by the control body.
  • the ventilation openings cover the air outlets of the guide tube.
  • the interior of the guide tube between the Racket and the piston is ventilated via the small ventilation openings build a low pressure air cushion that is sufficient around the To move clubs in the machining direction at a low speed.
  • the invention has for its object to provide a drilling and / or chisel device, that is economical and easy to manufacture, has a long lifespan and which prevents contamination of the interior of the guide tube.
  • a drilling and / or chiseling device which has the features stated in the characterizing section of patent claim 1.
  • the arrangement of further air passages makes it possible to make the cross-sectional areas of the individual air passages very small in order to effectively prevent the penetration of drilling dust or dirt particles into the interior of the guide tube. Little ventilation of the interior of the guide tube is also achieved via the further air passages when the device is in a first pressing position and the air passages are closed by the control element. Although the interior of the guide tube is poorly ventilated by the further air passages, it is possible to build up an air cushion through which the racket can be moved back and forth at a slow speed.
  • the pressure of the air cushion that can be built up in the first pressing position essentially corresponds to half the pressure of that air cushion that can be built up in a second pressing position
  • several further air passages are preferably distributed along the further planes over the circumference.
  • the racket is slowly accelerated and when the device is lifted off the processed surface the speed at which the racket is moved back and forth is reduced.
  • the further air outlets are advantageous evenly distributed over the respective circumference of the guide tube.
  • Air outlets have the same cross-sections.
  • a further reduction in the cross-sections of the air outlets and the others Air outlets can be achieved by opposing the Connect several additional levels along the processing direction to the first level where several other air outlets are distributed over the circumference. A closing of these further air passages in the other levels is also carried out by the control body which can be moved by the striking block.
  • the drilling and / or chiseling device shown schematically in FIG. 1 has one Housing 1 with a handle 3, a switch 4, a tool holder 2 for a not shown tool and an electric cable 5, through which the device with a external power source is connectable.
  • FIGS. 2 to 4 In the interior of the drilling and / or chiseling device is located according to FIGS. 2 to 4 extending parallel to the machining direction guide tube 9 with a in Machining direction pointing the first free end and the first free end opposite second free end.
  • the piston 7 In the guide tube 9, the piston 7 is not one completely shown striking mechanism 6 axially displaceable.
  • the piston 7 is connected via a bolt 8 to a connecting rod, which is the second free end of the guide tube 9 projects beyond the machining direction.
  • the guide tube 9 has several radially extending air passages 10 and several radially extending further Air passages 11 arranged between the piston 7 and the racket 19 are and over which the pressure of the air cushion can be influenced.
  • the air outlets 10 are along the circumference of a first plane E1 and the air passages 11 are along of the circumference of a further plane E2, which is counter to the machining direction is spaced from the first plane E1.
  • the air passages 10 and the further air passages 11 are controlled by means of a control body opposite the guide tube 9 from the striker 17 the machining direction and a spring 12 in the machining direction.
  • the striker 17 is guided in a striker guide 18, which is axially connected to the guide tube 9 communicates.
  • the spring 12 surrounds the guide tube 9 on the outside and is supported on a stop edge of the housing 1 and one against Machining direction facing support surface of the switching sleeve 13.
  • the control body is formed by a shift fork 15, a shift rod 14 and a shift sleeve 13.
  • the shift fork 15 acts in the interior of the guide tube 9 the striker 17 together and interspersed with their opposing free Ends diametrically opposite openings 16 of the guide tube 9.
  • Die Free ends of the shift fork 15 are in positive connection with the as Wire bracket trained shift rod 14.
  • a portion of the shift rod 14 is semicircular shaped and protrudes into a circumferential recess in the switching sleeve 13. The two free ends of the shift rod 14 extend in the machining direction and positively embrace the two free ends of the shift fork 15.
  • FIG. 2 shows the control body in its basic position.
  • the device is not in a pressed position.
  • the spaced A apart Air passages 10 and the further air passages 11 are open. Over all Air outlets 10, 11 provide such a strong ventilation of the interior of the Guide tube 9 reached so that the piston 7 does not build up an air cushion and the Racket 19 can move in the machining direction.
  • Fig. 3 shows the control body in a first pressing position, when pressing of the device against the surface to be processed, not shown, for example is reached after half the pressing distance.
  • the one that takes place during pressing Displacement of the striker 17 against the machining direction also causes Displacement of the control body in the same direction.
  • the switching sleeve 13 of the Control body covers all air passages 10. Only the other air outlets 11 are open.
  • An air cushion with a low pressure can be built up by the piston 7. The pressure of this air cushion is sufficient to slow the racket 19 To shift the speed in the machining direction.
  • Fig. 4 shows the control body in a further pressing position, which after the complete pressing of the device against the surface to be worked becomes.
  • the switching sleeve 13 of the control body covers all air passages 10 and all further air outlets 11.
  • the interior of the guide tube 9 is no longer ventilated.
  • An air cushion can be built up from the piston 7, with which the racket 19 can be moved at high speed in the machining direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP98810142A 1997-04-07 1998-02-23 Appareil de forage et/ou percussion Expired - Lifetime EP0876880B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19714288 1997-04-07
DE19714288A DE19714288A1 (de) 1997-04-07 1997-04-07 Bohr- und/oder Meisselgerät

Publications (3)

Publication Number Publication Date
EP0876880A2 true EP0876880A2 (fr) 1998-11-11
EP0876880A3 EP0876880A3 (fr) 2002-11-27
EP0876880B1 EP0876880B1 (fr) 2006-11-15

Family

ID=7825677

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810142A Expired - Lifetime EP0876880B1 (fr) 1997-04-07 1998-02-23 Appareil de forage et/ou percussion

Country Status (5)

Country Link
US (1) US5975217A (fr)
EP (1) EP0876880B1 (fr)
JP (1) JP4195119B2 (fr)
CN (1) CN1065165C (fr)
DE (2) DE19714288A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003045636A1 (fr) * 2001-11-16 2003-06-05 Robert Bosch Gmbh Machine-outil a main pourvue d'un systeme de percussion pneumatique
EP1368160B1 (fr) * 2001-03-12 2004-10-20 Wacker Construction Equipment AG Outil de percussion a amortissement pneumatique a fonctionnement au ralenti commande par frequence de mouvements
EP1754575A3 (fr) * 2005-08-19 2007-07-04 Makita Corporation Outil à impact motorisé
US9925653B2 (en) 2013-07-05 2018-03-27 Black & Decker Inc. Hammer drill

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6309829B1 (en) * 1997-05-27 2001-10-30 Pe Corporation (Ny) Length determination of nucleic acid repeat sequences by discontinuous primer extension
GB9902793D0 (en) * 1999-02-09 1999-03-31 Black & Decker Inc Rotary hammer
GB9902789D0 (en) * 1999-02-09 1999-03-31 Black & Decker Inc Rotary hammer
DE19929183B4 (de) * 1999-06-25 2004-07-29 Wacker Construction Equipment Ag Luftfederschlagwerk mit Hohl-Schlagkolben mit Leerlauföffnung
DE19955412A1 (de) * 1999-11-18 2001-05-23 Hilti Ag Bohr- und Meisselgerät
DE10019071A1 (de) * 2000-04-18 2001-10-25 Hilti Ag Elekrohandwerkzeuggerät mit Leerschlagabschaltung
DE10033362A1 (de) * 2000-07-08 2002-01-17 Hilti Ag Elektrohandwerkzeug mit Leerschlagabschaltung
GB0109747D0 (en) 2001-04-20 2001-06-13 Black & Decker Inc Hammer
DE10121088A1 (de) * 2001-04-28 2002-11-07 Bosch Gmbh Robert Bohr- und/oder Meißelhammer
DE10145464C2 (de) 2001-09-14 2003-08-28 Wacker Construction Equipment Bohr- und/oder Schlaghammer mit anpressdruckabhängiger Leerlaufsteuerung
JP4016772B2 (ja) * 2001-11-16 2007-12-05 日立工機株式会社 ハンマドリル
DE10333799B3 (de) * 2003-07-24 2005-02-17 Wacker Construction Equipment Ag Hohlkolbenschlagwerk mit Luftausgleichs- und Leerlauföffnung
JP4179159B2 (ja) * 2003-12-18 2008-11-12 日立工機株式会社 打撃工具
DE502004011101D1 (de) * 2004-06-18 2010-06-10 Hilti Ag Einrichtung zur Verbesserung des Abschaltverhaltens eines elektropneumatischen Abbaugeräts
US7306048B2 (en) * 2004-11-24 2007-12-11 Hitachi Koki Co., Ltd. Hammer drill having switching mechanism for switching operation modes
DE102005028918A1 (de) * 2005-06-22 2006-12-28 Wacker Construction Equipment Ag Bohr- und/oder Schlaghammer mit Leerlaufsteuerung
DE102005036560A1 (de) * 2005-08-03 2007-02-08 Wacker Construction Equipment Ag Bohr- und/oder Schlaghammer mit Linearantrieb und Luftkühlung
JP4509890B2 (ja) * 2005-08-19 2010-07-21 株式会社マキタ 衝撃式作業工具
JP5041575B2 (ja) * 2006-03-07 2012-10-03 日立工機株式会社 打撃工具
DE102007000081A1 (de) * 2007-02-08 2008-08-21 Hilti Ag Handwerkzeugmaschine mit pneumatischem Schlagwerk
JP4965333B2 (ja) * 2007-05-14 2012-07-04 株式会社マキタ 打撃工具
US8485274B2 (en) * 2007-05-14 2013-07-16 Makita Corporation Impact tool
JP4965334B2 (ja) * 2007-05-14 2012-07-04 株式会社マキタ 打撃工具
JP4889564B2 (ja) * 2007-05-14 2012-03-07 株式会社マキタ 打撃工具
US8534527B2 (en) * 2008-04-03 2013-09-17 Black & Decker Inc. Cordless framing nailer
US9216502B2 (en) 2008-04-03 2015-12-22 Black & Decker Inc. Multi-stranded return spring for fastening tool
DE102008064221B4 (de) * 2008-12-22 2016-03-17 Koki Technik Transmission Systems Gmbh Schaltgabel
US8636081B2 (en) 2011-12-15 2014-01-28 Milwaukee Electric Tool Corporation Rotary hammer
JP5518617B2 (ja) * 2010-08-02 2014-06-11 株式会社マキタ 打撃工具
DE102010062874A1 (de) * 2010-12-13 2012-06-14 Hilti Aktiengesellschaft Handwerkzeugmaschine
US8393409B2 (en) * 2010-12-29 2013-03-12 Ortho Technologies, Llc Electric motor driven tool for orthopedic impacting
JP6229956B2 (ja) 2010-12-29 2017-11-15 メディカル エンタープライゼス， エルエルシー 整形外科用衝撃を付与する電気モータ駆動式器具
US8695726B2 (en) 2010-12-29 2014-04-15 Medical Enterprises LLC Electric motor driven tool for orthopedic impacting
US9308636B2 (en) 2012-02-03 2016-04-12 Milwaukee Electric Tool Corporation Rotary hammer with vibration dampening
DE102012209020A1 (de) * 2012-05-29 2013-12-05 Robert Bosch Gmbh Handwerkzeugmaschinenschlagwerk
US9346158B2 (en) 2012-09-20 2016-05-24 Black & Decker Inc. Magnetic profile lifter
US9399281B2 (en) 2012-09-20 2016-07-26 Black & Decker Inc. Stall release lever for fastening tool
EP2857150A1 (fr) * 2013-10-03 2015-04-08 HILTI Aktiengesellschaft Machine-outil manuelle
WO2015133198A1 (fr) * 2014-03-03 2015-09-11 日立工機株式会社 Outil de frappe
EP3181300A1 (fr) * 2015-12-15 2017-06-21 HILTI Aktiengesellschaft Machine-outil portative a percussion
CN106895131B (zh) * 2015-12-21 2024-01-23 博世电动工具（中国）有限公司 密封通气装置及包括其的设备
WO2020056654A1 (fr) * 2018-09-20 2020-03-26 博世电动工具（中国）有限公司 Machine-outil à percussion
CN219337617U (zh) * 2020-04-02 2023-07-14 米沃奇电动工具公司 旋转锤
EP4382254A1 (fr) 2022-12-07 2024-06-12 Hilti Aktiengesellschaft Mécanisme de percussion pour un outil électrique portatif et outil électrique portatif

Citations (3)

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Publication number Priority date Publication date Assignee Title
US5111890A (en) * 1988-08-02 1992-05-12 Robert Bosch Gmbh Hammer drill
US5456324A (en) * 1993-11-26 1995-10-10 Hitachi Koki Company Limited Percussion hammer
EP0759341A2 (fr) * 1995-08-18 1997-02-26 Makita Corporation Marteau perforateur avec mécanisme de prévention des frappes à vide

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US2580158A (en) * 1948-12-23 1951-12-25 Dean William Henry Power-operated portable tool
US4113035A (en) * 1977-04-21 1978-09-12 Licentia Patent-Verwaltungs-G.M.B.H. Hammer drill with drive and percussion elements accommodated in a cylinder
EP0052507B1 (fr) * 1980-11-18 1985-02-13 Black & Decker Inc. Perceuse à percussion
DE3304916A1 (de) * 1983-02-12 1984-08-16 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3932134A1 (de) * 1989-09-27 1991-04-04 Bosch Gmbh Robert Hammer mit luftfederschlagwerk
DE4239294A1 (de) * 1992-11-23 1994-05-26 Black & Decker Inc Bohrhammer mit pneumatischem Schlagwerk
JP3292972B2 (ja) * 1996-03-29 2002-06-17 株式会社マキタ 打撃工具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111890A (en) * 1988-08-02 1992-05-12 Robert Bosch Gmbh Hammer drill
US5456324A (en) * 1993-11-26 1995-10-10 Hitachi Koki Company Limited Percussion hammer
EP0759341A2 (fr) * 1995-08-18 1997-02-26 Makita Corporation Marteau perforateur avec mécanisme de prévention des frappes à vide

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1368160B1 (fr) * 2001-03-12 2004-10-20 Wacker Construction Equipment AG Outil de percussion a amortissement pneumatique a fonctionnement au ralenti commande par frequence de mouvements
WO2003045636A1 (fr) * 2001-11-16 2003-06-05 Robert Bosch Gmbh Machine-outil a main pourvue d'un systeme de percussion pneumatique
US7040413B2 (en) 2001-11-16 2006-05-09 Robert Bosch Gmbh Hand power tool with a pneumatic striking mechanism
EP1754575A3 (fr) * 2005-08-19 2007-07-04 Makita Corporation Outil à impact motorisé
US7383895B2 (en) 2005-08-19 2008-06-10 Makita Corporation Impact power tool
US9925653B2 (en) 2013-07-05 2018-03-27 Black & Decker Inc. Hammer drill

Also Published As

Publication number Publication date
DE19714288A1 (de) 1998-10-08
US5975217A (en) 1999-11-02
JPH10309679A (ja) 1998-11-24
JP4195119B2 (ja) 2008-12-10
CN1197716A (zh) 1998-11-04
EP0876880A3 (fr) 2002-11-27
DE59813801D1 (de) 2006-12-28
EP0876880B1 (fr) 2006-11-15
CN1065165C (zh) 2001-05-02

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