EP0033304A1 - Vorrichtung für tragbare Schlagwerkzeuge - Google Patents

Vorrichtung für tragbare Schlagwerkzeuge Download PDF

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Publication number
EP0033304A1
EP0033304A1 EP81850005A EP81850005A EP0033304A1 EP 0033304 A1 EP0033304 A1 EP 0033304A1 EP 81850005 A EP81850005 A EP 81850005A EP 81850005 A EP81850005 A EP 81850005A EP 0033304 A1 EP0033304 A1 EP 0033304A1
Authority
EP
European Patent Office
Prior art keywords
spring
axle
handles
machine housing
handle
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Withdrawn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
EP81850005A
Other languages
English (en)
French (fr)
Inventor
Göran Ragnmark
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.)
Atlas Copco AB
Original Assignee
Atlas Copco AB
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 Atlas Copco AB filed Critical Atlas Copco AB
Publication of EP0033304A1 publication Critical patent/EP0033304A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing

Definitions

  • the present invention relates to a device for hand-held hammer machines for damping of vibrations transferred to the handles of the machine.
  • the object of the present invention is to considerably damp the vibrations transferred from the machine housing to the handles. This is achieved by at least one spring being arranged such relative to the handles and the machine housing that the spring is compressed when the handles are pressed down and at the same time the moment arm of the spring force relative to the axis of rotation of the handle means is shortened in such a way that the moment of the spring force about this axis of rotation is substantially constant over the major part of the range of movement of the handles.
  • fig. 1 shows a combined drilling and breaking machine in which the invention is used.
  • Fig. 2 shows a part of the machine from behind with certain parts removed to show the invention.
  • Fig. 3 shows a corresponding view from above.
  • Fig. 4 shows a perspective view from behind with the handles in one angular position.
  • Fig. 5 shows a corresponding view with the handles in another angular position.
  • Figs. 6 and 7 show schematically the operation of the invention.
  • Fig. 8 shows how the force by which the handles are pressed down vary as a function of the downpressing of the handles.
  • the machine shown in fig. 1 is a combined rock drilling and breaking machine which comprises a machine housing 1.
  • a combustion engine is mounted in the machine housing in the usual way.
  • the combustion chamber of the engine is situated between an engine piston connected to a crank shaft and the hammer piston of the machine. Since the driving of the hammer piston is not essential to the present invention other means , e.g. compressed air, could be incorporated for the driving of the hammer piston instead of the combustion engine.
  • the machine is at its lower end provided with a tool, e.g. a drill rod 3.
  • the machine is furthermore provided with a handle means, incorporating two handles 2, which is pivotally journalled in the machine housing 1.
  • the machine is furthermore provided with a further handle 7 for more precise sideways control of the machine for certain types of operation, e.g. stamping.
  • These handles are preferably made of an elastic material, e.g. polyurethane, in order to obtain good damping of high frequency vibrations.
  • the upper part of the machine housing 1 is shown with certain parts removed to show a preferred embodiment of the invention.
  • the upper part of the machine housing 1 comprises the crank housing 4 and a transverse axle 5 which is rotatably journalled in the machine housing.
  • the axle 5 is by means of arms 13 connected with the handles 2.
  • the axle 5 is furthermore provided with actuation means 6 in which short axles 8 are rotatably journalled.
  • the arms 13 and the actuation means 6 are connected with the axle 5 by means of pins 14 or in another suitable way.
  • Two helical springs 11 are supported at one end by cup- shaped support means 12 on the machine housing 1 and at the other end by nuts 10. If the machine is driven by compressed air springs 11 could be replaced by air springs.
  • Nuts 10 are by means of adjustment screws connected with the short axles 8.
  • Handles 2 are provided with pins 16 which cooperate with recesses 15 in the machine housing 1 in order to restrict the range of movement of the handles 2.
  • Figs. 6 and 7 show schematically the operation of the vibration damper.
  • Fig. 6 shows the position of the actuation means 6 when the handles 2 are not loaded.
  • fig. 7 the actuation means 6 is shown in the position it takes when the handles 2 are near their lower limit position. In this position spring 11 has been compressed substantially so that the spring force has increased substantially.
  • the moment arm A of the spring force relative to the axis 5 has been shortened. This occurs in such a way that the moment of the spring force about the axis 5 remains substantially constant over the major part of the range of movement of the handles 2.
  • fig. 8 which shows how the feed force F applied against the handles 2 varies with the downpressing d in a tested case.
  • the substantially constant force F which is obtained after a certain downpressing of the handles 2 can be changed by means of the adjustment screws 9.
  • the machine housing 1 can oscillate in the working direction of the tool 3 without these vibrations being transferred to any substantial degree to the handles 2 and the machine operator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Vibration Prevention Devices (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP81850005A 1980-01-24 1981-01-12 Vorrichtung für tragbare Schlagwerkzeuge Withdrawn EP0033304A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8000556A SE420058B (sv) 1980-01-24 1980-01-24 Svengningsdempande anordning vid handhallna slaende maskiner
SE8000556 1980-01-24

Publications (1)

Publication Number Publication Date
EP0033304A1 true EP0033304A1 (de) 1981-08-05

Family

ID=20340052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81850005A Withdrawn EP0033304A1 (de) 1980-01-24 1981-01-12 Vorrichtung für tragbare Schlagwerkzeuge

Country Status (3)

Country Link
EP (1) EP0033304A1 (de)
JP (1) JPS56107890A (de)
SE (1) SE420058B (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0115241A1 (de) * 1983-02-03 1984-08-08 MACO-MEUDON Société dite : Schlagwerkzeug mit schwingenden Handgriffen
EP0194347A1 (de) * 1984-12-24 1986-09-17 Wacker-Werke GmbH & Co. KG Gefederte Anbringung einer die Haltegriffe tragenden Schutzhaube an einem Schlagwerkzeug
GB2237528A (en) * 1989-10-31 1991-05-08 Breakers As Vibration-damped hydraulic hammer
EP1529602A2 (de) 2003-11-04 2005-05-11 BLACK & DECKER INC. Schwingungsdämpfungsvorrichtung für ein Elektrowerkzeug und Elektrowerkzeug mit einer solchen Vorrichtung
EP1529603A3 (de) * 2003-11-04 2006-06-07 BLACK & DECKER INC. Schwingungsdämpfungsvorrichtung für ein Elektrowerkzeug und Elektrowerkzeug mit einer solchen Vorrichtung
EP1800804A2 (de) 2005-12-23 2007-06-27 HILTI Aktiengesellschaft Handwerkzeuggerät mit gefederter Griffaufhängung
US7320369B2 (en) 2003-11-04 2008-01-22 Black & Decker Inc. Vibration reduction apparatus for power tool and power tool incorporating such apparatus
US7322428B2 (en) 2004-06-04 2008-01-29 Black & Decker Inc. Vibration reduction apparatus for power tool and power tool incorporating such apparatus
US7886838B2 (en) 2008-03-18 2011-02-15 Black & Decker Inc. Hammer
US7987921B2 (en) 2008-03-18 2011-08-02 Black & Decker Inc. Hammer
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
US10926393B2 (en) 2018-01-26 2021-02-23 Milwaukee Electric Tool Corporation Percussion tool
CN113905850A (zh) * 2019-07-18 2022-01-07 喜利得股份公司 手持式电动工具
DE102025103229A1 (de) * 2025-01-29 2026-07-30 Robert Bosch Gesellschaft mit beschränkter Haftung Abbruchhammer mit zwei seitlichen Handgriffen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1358486A (en) * 1920-04-24 1920-11-09 Ingersoll Rand Co Handle for percussive tools
AT122752B (de) * 1930-01-10 1931-05-11 Ernst Ing Elster Abfederung der Haltevorrichtung von Werzeugen mit hin und her gehender Arbeitsbewegung.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1358486A (en) * 1920-04-24 1920-11-09 Ingersoll Rand Co Handle for percussive tools
AT122752B (de) * 1930-01-10 1931-05-11 Ernst Ing Elster Abfederung der Haltevorrichtung von Werzeugen mit hin und her gehender Arbeitsbewegung.

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0115241A1 (de) * 1983-02-03 1984-08-08 MACO-MEUDON Société dite : Schlagwerkzeug mit schwingenden Handgriffen
EP0194347A1 (de) * 1984-12-24 1986-09-17 Wacker-Werke GmbH & Co. KG Gefederte Anbringung einer die Haltegriffe tragenden Schutzhaube an einem Schlagwerkzeug
GB2237528A (en) * 1989-10-31 1991-05-08 Breakers As Vibration-damped hydraulic hammer
US7320369B2 (en) 2003-11-04 2008-01-22 Black & Decker Inc. Vibration reduction apparatus for power tool and power tool incorporating such apparatus
EP1529603A3 (de) * 2003-11-04 2006-06-07 BLACK & DECKER INC. Schwingungsdämpfungsvorrichtung für ein Elektrowerkzeug und Elektrowerkzeug mit einer solchen Vorrichtung
US7472760B2 (en) 2003-11-04 2009-01-06 Black & Decker Inc. Vibration reduction apparatus for power tool and power tool incorporating such apparatus
US7762348B2 (en) 2003-11-04 2010-07-27 Black & Decker Inc. Vibration reduction apparatus for power tool and power tool incorporating such apparatus
EP1529602A2 (de) 2003-11-04 2005-05-11 BLACK & DECKER INC. Schwingungsdämpfungsvorrichtung für ein Elektrowerkzeug und Elektrowerkzeug mit einer solchen Vorrichtung
US7322428B2 (en) 2004-06-04 2008-01-29 Black & Decker Inc. Vibration reduction apparatus for power tool and power tool incorporating such apparatus
EP1800804A2 (de) 2005-12-23 2007-06-27 HILTI Aktiengesellschaft Handwerkzeuggerät mit gefederter Griffaufhängung
US8342260B2 (en) 2005-12-23 2013-01-01 Hilti Aktiengesellschaft Hand-held power tool with spring-loaded handle suspension
EP1800804A3 (de) * 2005-12-23 2008-09-10 HILTI Aktiengesellschaft Handwerkzeuggerät mit gefederter Griffaufhängung
CN1986167B (zh) * 2005-12-23 2010-12-08 希尔蒂股份公司 具有减振的手柄悬挂装置的手工工具机
US7886838B2 (en) 2008-03-18 2011-02-15 Black & Decker Inc. Hammer
US7987921B2 (en) 2008-03-18 2011-08-02 Black & Decker Inc. Hammer
US11633843B2 (en) 2017-10-20 2023-04-25 Milwaukee Electric Tool Corporation Percussion tool
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
US11865687B2 (en) 2018-01-26 2024-01-09 Milwaukee Electric Tool Corporation Percussion tool
US11141850B2 (en) 2018-01-26 2021-10-12 Milwaukee Electric Tool Corporation Percussion tool
US11203105B2 (en) 2018-01-26 2021-12-21 Milwaukee Electric Tool Corporation Percussion tool
US11059155B2 (en) 2018-01-26 2021-07-13 Milwaukee Electric Tool Corporation Percussion tool
US11759935B2 (en) 2018-01-26 2023-09-19 Milwaukee Electric Tool Corporation Percussion tool
US10926393B2 (en) 2018-01-26 2021-02-23 Milwaukee Electric Tool Corporation Percussion tool
US12472613B2 (en) 2018-01-26 2025-11-18 Milwaukee Electric Tool Corporation Percussion tool
CN113905850A (zh) * 2019-07-18 2022-01-07 喜利得股份公司 手持式电动工具
US12048993B2 (en) 2019-07-18 2024-07-30 Hilti Aktiengesellschaft Hand-held power tool
DE102025103229A1 (de) * 2025-01-29 2026-07-30 Robert Bosch Gesellschaft mit beschränkter Haftung Abbruchhammer mit zwei seitlichen Handgriffen

Also Published As

Publication number Publication date
SE8000556L (sv) 1981-07-25
SE420058B (sv) 1981-09-14
JPS56107890A (en) 1981-08-27

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT NL

17P Request for examination filed

Effective date: 19820125

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19830723

RIN1 Information on inventor provided before grant (corrected)

Inventor name: RAGNMARK, GOERAN