EP2017038A1 - Outil manuel à percussion pneumatique - Google Patents

Outil manuel à percussion pneumatique Download PDF

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Publication number
EP2017038A1
EP2017038A1 EP20080104123 EP08104123A EP2017038A1 EP 2017038 A1 EP2017038 A1 EP 2017038A1 EP 20080104123 EP20080104123 EP 20080104123 EP 08104123 A EP08104123 A EP 08104123A EP 2017038 A1 EP2017038 A1 EP 2017038A1
Authority
EP
European Patent Office
Prior art keywords
axis
hand tool
rotation
percussion
distance
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
EP20080104123
Other languages
German (de)
English (en)
Other versions
EP2017038B1 (fr
Inventor
Erwin Manschitz
Reinhard Schulz
Alexander Löffler
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 EP2017038A1 publication Critical patent/EP2017038A1/fr
Application granted granted Critical
Publication of EP2017038B1 publication Critical patent/EP2017038B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/003—Crossed drill and motor spindles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/245—Spatial arrangement of components of the tool relative to each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide
    • Y10T74/18304—Axial cam
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide
    • Y10T74/18304—Axial cam
    • Y10T74/18312—Grooved

Definitions

  • the invention relates to a hand tool with pneumatic percussion referred to in the preamble of claim 1.
  • Such hand tool machines are z. B. formed as a chisel or combi hammer.
  • an electrically operated drill and / or Meisselhammer known which has an arranged in a device housing percussion, which is operable by a motor.
  • the hammer mechanism has a guided in a guide tube exciter element, such as an excitation piston, which is reciprocally movable by means of a connecting rod actuated by the motor.
  • the connecting rod is mounted eccentrically on an eccentric wheel at its end facing away from the piston, whose axis of rotation is stationary and which is driven by the motor.
  • the axis of rotation of the Excenterrades lies in a hammer mechanism defined by the impact mechanism.
  • the excitation element drives via an air cushion or an air spring also guided in the guide tube flying pistons, which exerts a striker on a front recorded in a tool holder tool.
  • an elastic mechanical compression spring is arranged in addition to the air or gas spring between the excitation piston and the flying piston.
  • the present invention has the object to optimize the pressure curve in the percussion in a structurally simple manner.
  • the axis of rotation of the eccentric wheel is arranged at a distance perpendicular to the striking axis.
  • the distance of the axis of rotation of the eccentric wheel to the impactor axis is in a range of 10% to 80% of the radius of the eccentric wheel, whereby a pressure drop in the percussion in the range of 2% (at 10% of the radius) to about 10% (at 80% of the radius) can be achieved.
  • the connecting rod is formed cranked, whereby collisions with the guide tube can be avoided in a technically simple manner.
  • the offset angle is preferably 5 ° to 45 °, depending on the existing construction conditions.
  • FIG. 1 a hand tool 10 embodied as a rotating and hammering combination hammer is shown, which has a housing 11 in which a percussion mechanism 20 acting on a tool 15 which can be arranged in a tool holder 14, a gear 13 and a motor 12 are arranged.
  • the striking mechanism 20 is coupled via a not visible in the figures output shaft with the transmission 13, which translates a rotational movement of the motor 12 and the output shaft on a Fig. 2 apparent Excenterrad 17 transmits, which is displaceable in rotation in a rotational direction 16.
  • the striking mechanism 20 has a guide tube 21, in which a exciter element 22 designed as an exciter piston is guided to be moved back and forth.
  • the guide tube 21 may be formed in two or more parts to simplify the assembly.
  • the excitation element 22 is connected to generate a lifting movement during operation of the power tool 10 via a pivotally mounted on this connecting rod 29 with the eccentric 17.
  • the connecting rod 29 is connected via an eccentrically arranged on the eccentric 17 pivot pin 18 with this, whereby a rotational movement of the eccentric 17 in the direction of rotation 16 is transformed into an oscillating stroke movement of the excitation element 22.
  • the eccentric 17 rotates about a central axis of rotation D.
  • the guide tube 21 In the guide tube 21 are also still a Anvil 24 and designed as a flying piston impact element 23 mounted axially displaceable.
  • the striking element 23 is also displaceable via the excitation piston and the air spring 25 located between it and the excitation element 22 in an oscillating stroke movement.
  • the striking element 23 strikes in the impact mode of the power tool 10 on the striker 24, which in turn on the tool 15 (off Fig. 1 ) suggests.
  • the striking element 23 strikes directly on the end of a tool.
  • the air spring 25 or gas spring (depending on the gas or gas mixture used) between the excitation element 22 and the striking element 23 can be switched on and off via switching means (not shown in the figures).
  • the percussion mechanism 20 defines a central percussion axis S which runs centrally through the guide tube 21 and the elements (exciter element 22, etc.) moved therein.
  • the axis of rotation D of the Excenterrades 17 is offset perpendicular to the percussion axis S by a distance X, whereby the pressure curve in the hammer mechanism 20 during a working reduced but still achieved the same single impact energy or at the same maximum pressure, a higher single impact energy is achieved.
  • the axis of rotation D is in the present example, in which the direction of rotation 16 of the eccentric 17 is rotating clockwise, based on the direction of impact 19 of the percussion mechanism 20 to the right out of the percussion axis S adoptedverlagert. In a counterclockwise rotating striking mechanism, however, the axis of rotation D of the eccentric wheel 17 would be displaced exactly opposite from the striking mechanism axis S.
  • the distance X corresponds to 0.1 to 0.8 times the radius RE of the Excenterrades 17th
  • the relative to the percussion axis S axial distance A of the two possible crossing points (indicated by the dotted circles 31, 32) of the journal 18 by the percussion axis S upon rotation of the eccentric 17 is less than twice the radial distance RL of the journal 18 to the rotation axis D. of the Excenterrades 17.
  • the connecting rod 29 is preferably formed cranked wherein the offset angle K is preferably between 5 ° and 45 °.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP08104123.8A 2007-07-19 2008-05-27 Outil manuel à percussion pneumatique Not-in-force EP2017038B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007000393A DE102007000393A1 (de) 2007-07-19 2007-07-19 Handwerkzeugmaschine mit pneumatischem Schlagwerk

Publications (2)

Publication Number Publication Date
EP2017038A1 true EP2017038A1 (fr) 2009-01-21
EP2017038B1 EP2017038B1 (fr) 2016-03-09

Family

ID=39766835

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08104123.8A Not-in-force EP2017038B1 (fr) 2007-07-19 2008-05-27 Outil manuel à percussion pneumatique

Country Status (5)

Country Link
US (1) US8267189B2 (fr)
EP (1) EP2017038B1 (fr)
JP (1) JP5308731B2 (fr)
CN (1) CN101347934A (fr)
DE (1) DE102007000393A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2960374A1 (fr) * 2014-06-23 2015-12-30 Wacker Neuson Produktion GmbH & Co. KG Appareil de travail doté d'un moulin à bocards ou d'un outil de percussion ayant une transmission à bielle oblique

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101444909B (zh) * 2007-11-27 2013-03-27 希尔蒂股份公司 具有气动冲击装置的手持式工具机
CN102371573A (zh) * 2010-08-10 2012-03-14 南京德朔实业有限公司 电动工具
DE102011075765A1 (de) 2011-05-12 2012-11-15 Hilti Aktiengesellschaft Handwerkzeugmaschine
JP5913010B2 (ja) * 2012-09-03 2016-04-27 株式会社マキタ 打撃工具
US10052747B2 (en) 2012-09-03 2018-08-21 Makita Corporation Hammer tool
CN103331735B (zh) * 2013-07-02 2016-04-13 陈振宇 用于进行冲击作业的冲击装置以及工具机
EP2857149A1 (fr) * 2013-10-03 2015-04-08 HILTI Aktiengesellschaft Machine-outil manuelle
CN105940847B (zh) * 2016-06-27 2017-09-29 蒙超华 一种拉拔式木薯收获机
CN109404514B (zh) * 2017-08-14 2021-06-11 苏州宝时得电动工具有限公司 偏心轮的支撑结构、传动机构和电动工具
CN109176411B (zh) * 2018-11-13 2024-03-29 久维科技(苏州)有限公司 一种快速紧固装置
KR102727125B1 (ko) 2019-08-29 2024-11-06 현대자동차주식회사 편심된 구동휠을 이용한 주행 장치
US11864808B2 (en) * 2021-04-01 2024-01-09 DePuy Synthes Products, Inc. Gas spring surgical impacting tools
US11945084B2 (en) * 2021-04-26 2024-04-02 Snap-On Incorporated Offset impact mechanism for a hammer tool

Citations (6)

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Publication number Priority date Publication date Assignee Title
US1959516A (en) * 1930-08-28 1934-05-22 Black & Decker Mfg Co Hammer
GB670643A (en) * 1949-01-28 1952-04-23 Kenneth Ernest Caine Improvements in or relating to percussion hammers
SU1138310A1 (ru) 1983-05-20 1985-02-07 Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт Механизированного И Ручного Строительно-Монтажного Инструмента,Вибраторов И Строительно-Отделочных Машин Компрессионно-вакуумна машина ударного действи
JPS60109789U (ja) 1983-12-22 1985-07-25 松下電工株式会社 振動ドリル
GB2403181A (en) * 2003-06-24 2004-12-29 Milwaukee Electric Tool Corp Drive mechanism for power tool
EP1584422A1 (fr) 2004-04-07 2005-10-12 HILTI Aktiengesellschaft Procédé et appareil pour réduire les pointes de pression dans une machine-outil munie d'un système de percussion électromagnétique

Family Cites Families (16)

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US1978058A (en) * 1930-05-01 1934-10-23 Julius C Peterson Variable stroke lever engine
US1901981A (en) * 1931-01-12 1933-03-21 Ragnar Erfass Motor-driven mechanical hammer
US2873611A (en) * 1955-07-01 1959-02-17 Arnold E Biermann Variable stroke mechanisms
US2909164A (en) * 1955-07-01 1959-10-20 Arnold E Biermann Multi-cylinder internal combustion engines
GB1195505A (en) * 1967-07-31 1970-06-17 Hilti Ag Hammer Drill
US4436163A (en) * 1978-12-13 1984-03-13 Black & Decker Inc. Arrangement for converting rotary motion to reciprocatory motion
SU1617139A1 (ru) * 1988-08-09 1990-12-30 Московское Научно-Производственное Объединение По Механизированному Строительному Инструменту И Отделочным Машинам Компрессионно-вакуумна машина ударного действи
DE10034359A1 (de) * 2000-07-14 2002-01-24 Hilti Ag Schlagendes Elektrohandwerkzeuggerät
JP2003172101A (ja) * 2001-12-05 2003-06-20 Nissan Motor Co Ltd 内燃機関のクランク機構
US7658012B2 (en) * 2002-12-23 2010-02-09 Milwaukee Electric Tool Corporation Drive mechanism and power tool
ATE467487T1 (de) * 2003-03-21 2010-05-15 Black & Decker Inc Schwingungsreduziervorrichtung für kraftbetriebenes werkzeug und solch eine vorrichtung enthaltendes kraftbetriebenes werkzeug
DE102004022623A1 (de) * 2004-05-07 2005-12-08 Robert Bosch Gmbh Handwerkzeugmaschine mit einem Schlagwerk
DE102005021734A1 (de) * 2005-05-11 2006-11-16 Robert Bosch Gmbh Elektrowerkzeugmaschine
DE102005061399A1 (de) * 2005-12-22 2007-07-05 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere Bohr- und/oder Meißelhammer
DE102005062861A1 (de) * 2005-12-29 2007-07-05 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere Bohr- und/oder Meißelhammer
DE102006005852A1 (de) * 2006-02-09 2007-08-23 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere Bohr- und/oder Meißelhammer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959516A (en) * 1930-08-28 1934-05-22 Black & Decker Mfg Co Hammer
GB670643A (en) * 1949-01-28 1952-04-23 Kenneth Ernest Caine Improvements in or relating to percussion hammers
SU1138310A1 (ru) 1983-05-20 1985-02-07 Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт Механизированного И Ручного Строительно-Монтажного Инструмента,Вибраторов И Строительно-Отделочных Машин Компрессионно-вакуумна машина ударного действи
JPS60109789U (ja) 1983-12-22 1985-07-25 松下電工株式会社 振動ドリル
GB2403181A (en) * 2003-06-24 2004-12-29 Milwaukee Electric Tool Corp Drive mechanism for power tool
EP1584422A1 (fr) 2004-04-07 2005-10-12 HILTI Aktiengesellschaft Procédé et appareil pour réduire les pointes de pression dans une machine-outil munie d'un système de percussion électromagnétique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2960374A1 (fr) * 2014-06-23 2015-12-30 Wacker Neuson Produktion GmbH & Co. KG Appareil de travail doté d'un moulin à bocards ou d'un outil de percussion ayant une transmission à bielle oblique

Also Published As

Publication number Publication date
US20090020299A1 (en) 2009-01-22
DE102007000393A1 (de) 2009-01-22
US8267189B2 (en) 2012-09-18
JP2009023084A (ja) 2009-02-05
CN101347934A (zh) 2009-01-21
JP5308731B2 (ja) 2013-10-09
EP2017038B1 (fr) 2016-03-09

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