EP1431005B1 - Schlagende Elektrohandwerkzeugmaschine - Google Patents

Schlagende Elektrohandwerkzeugmaschine Download PDF

Info

Publication number
EP1431005B1
EP1431005B1 EP03104752A EP03104752A EP1431005B1 EP 1431005 B1 EP1431005 B1 EP 1431005B1 EP 03104752 A EP03104752 A EP 03104752A EP 03104752 A EP03104752 A EP 03104752A EP 1431005 B1 EP1431005 B1 EP 1431005B1
Authority
EP
European Patent Office
Prior art keywords
percussion
motor
electric hand
axis
power tool
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.)
Expired - Lifetime
Application number
EP03104752A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1431005A3 (de
EP1431005A2 (de
Inventor
Holger Cecchin
Christian Daubner
Hubert Daxenberger
David Hruza
Christoph Josef Kink
Ferdinand Kristen
Erwin Manschitz
Hans-Jürgen Horst Georg Pfisterer
Walter Wissmach
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 EP1431005A2 publication Critical patent/EP1431005A2/de
Publication of EP1431005A3 publication Critical patent/EP1431005A3/de
Application granted granted Critical
Publication of EP1431005B1 publication Critical patent/EP1431005B1/de
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
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/003—Crossed drill and motor spindles

Definitions

  • the invention refers to an electric hand-held power tool, such as a combi-hammer or chisel hammer, at least partially hitting the preamble of claim 1 and as shown in FIG DE 736 794 known.
  • a tool striking driving electric hand tool machines have by interacting with the workpiece and the hand-arm system of the user as well as the internal masses and stiffness distribution on a complex self-excitation, the resulting self-vibration is to suppress as much as possible, especially in the handle area.
  • the technical effort in this passive passive damping or actively controlled vibration suppression increases with the complexity of self-excitation to be compensated.
  • a chisel hammer has a reluctance motor mounted cantilevered on its rotor axis, which is extended directly to the eccentric of the percussion unit, and is therefore arranged completely on one side of the striking axis.
  • the mass center of gravity thus offset from the striking axis to the reluctance motor leads to bending moments through the interaction with the workpiece and the hand-arm system of the user and finally to complex, non-axial vibrations.
  • a reluctance motor connected directly to the eccentric is necessarily slow rotating, which has a high mass / power ratio for reluctance motors.
  • a chisel hammer with a striking mechanism assembly has a mass distribution that is substantially symmetrical radially with respect to the striking axis, in that the striking mechanism transmission is arranged to be a part of the motor diametrically with respect to the striking axis.
  • the space requirement of the engine in the core area of the striking axis requires a constructive large axial distance to the eccentric, whereby bending moments are excited.
  • the object of the invention consists in the realization of an at least partially striking electric hand tool with largely analytically simple excitation.
  • an electric hand tool machine which strikes at least partially along a striking axis has an electric motor with a rotor shaft arranged transversely to the striking axis with a rotor laminated core and a motor pinion which meshes a striking mechanism assembly with an eccentric via a percussion gear mechanism, the rotor laminated core being completely diametrically opposed to the percussion gear mechanism with respect to the striking axis is arranged.
  • the rotor shaft is arranged directly adjacent to a crankshaft of the eccentric by an eccentric pinion meshes as part of the percussion gear directly with the motor pinion on the rotor shaft, whereby their distance is determined only by both pinion radii.
  • the eccentric pinion is designed as an outer pinion of the crankshaft or alternatively as an inner pinion of a hollow crankshaft, whereby the distance is determined by the sum or the difference of the pinion radii.
  • the storage of the electric motor via the rotor shaft at two bearings in the percussion gear further advantageously in a gear housing and in a bearing cap, optionally made of lightweight die-cast aluminum, whereby a precise guidance of the meshing engine pinion is achieved.
  • the rotor laminated core is freely cantilevered, whereby a mass-afflicted sheet-metal bearing side bearing is eliminated, whereby the engine center of gravity is moved closer to the impact axis.
  • a massearmes fan is arranged on the axis distant, BlechchUnfuren front end of the rotor shaft, whereby no axle near installation space is claimed.
  • the structural design of a motor housing is also simplified by the lack of bearing.
  • the electric motor as a brushless motor, further advantageously designed as a reluctance motor, whereby a high power / mass ratio can be realized.
  • the striking mechanism assembly and the electric motor have a common center of gravity on the striking axis, as a result of which analytically simpler excitations occur.
  • an electric hand-held power tool 1 striking along a striking axis A has an electric motor 2 designed as a reluctance motor with a rotor shaft 3 arranged transversely to the striking axis A with a rotor laminated core 4 and a motor pinion 5.
  • a striking mechanism 6 with an eccentric 7 is driven by a percussion gear 8 meshing of the motor pinion 4.
  • the rotor laminated core 4 is arranged completely diametrically with respect to the percussion gear 8 with respect to the striking axis A.
  • the rotor shaft 3 is arranged directly adjacent to a crankshaft 9 of the eccentric 7, in that an outer eccentric pinion 10 meshes directly with the motor pinion 5 on the rotor shaft 3 as part of the percussion gearbox 8.
  • the rotor shaft 3 is formed with the rotor laminated core 4 cantilevered and at the axis distant, sheet metal packet side front end of the rotor shaft 3 is a massearmes fan 14 is arranged.
  • the percussion gear 8 is arranged at 90% with respect to the striking axis A diametrically to the electric motor 2, whereby the common center of gravity S of the Schlagtechniksbaugruppr 6 and the electric motor 2 is located on the striking axis A.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP03104752A 2002-12-19 2003-12-17 Schlagende Elektrohandwerkzeugmaschine Expired - Lifetime EP1431005B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10259566A DE10259566A1 (de) 2002-12-19 2002-12-19 Schlagende Elektrohandwerkzeugmaschine
DE10259566 2002-12-19

Publications (3)

Publication Number Publication Date
EP1431005A2 EP1431005A2 (de) 2004-06-23
EP1431005A3 EP1431005A3 (de) 2009-07-01
EP1431005B1 true EP1431005B1 (de) 2013-03-06

Family

ID=32336474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03104752A Expired - Lifetime EP1431005B1 (de) 2002-12-19 2003-12-17 Schlagende Elektrohandwerkzeugmaschine

Country Status (6)

Country Link
US (1) US7048076B2 (pl)
EP (1) EP1431005B1 (pl)
JP (1) JP4648624B2 (pl)
CN (1) CN100341669C (pl)
DE (1) DE10259566A1 (pl)
PL (1) PL204879B1 (pl)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005017481B4 (de) * 2005-04-15 2007-08-30 Compact Dynamics Gmbh Linearaktor
DE102005017482B4 (de) * 2005-04-15 2007-05-03 Compact Dynamics Gmbh Gaswechselventilaktor für einen ventilgesteuerten Verbrennungsmotor
DE102005017483B4 (de) * 2005-04-15 2007-04-05 Compact Dynamics Gmbh Linearaktor in einem Elektro-Schlagwerkzeug
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
GB2433716A (en) * 2005-12-29 2007-07-04 Bosch Gmbh Robert Hammer drill and/or hammer chisel with bevel gear
DE102006005852A1 (de) * 2006-02-09 2007-08-23 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere Bohr- und/oder Meißelhammer
GB2431610A (en) * 2006-03-03 2007-05-02 Black & Decker Inc Handle Damping System
DE102006035975A1 (de) * 2006-08-02 2008-02-07 Robert Bosch Gmbh Elektrowerkzeugmaschine
JP5574156B2 (ja) * 2010-03-05 2014-08-20 日立工機株式会社 ボルト締付機
DE102011082093A1 (de) * 2011-09-02 2013-03-07 Robert Bosch Gmbh Handgriffvorrichtung für eine Handwerkzeugmaschine
DE102013202248A1 (de) * 2012-05-29 2013-12-05 Robert Bosch Gmbh Werkzeugvorrichtung
CN104084934A (zh) * 2014-07-03 2014-10-08 长沙启科电子有限公司 一种新型智能控制直流无刷电镐
EP3697574B1 (en) 2017-10-20 2025-03-19 Milwaukee Electric Tool Corporation Percussion tool
EP3743245B1 (en) 2018-01-26 2024-04-10 Milwaukee Electric Tool Corporation Percussion tool
EP3670095A1 (de) * 2018-12-20 2020-06-24 Hilti Aktiengesellschaft Handwerkzeugmaschine
EP3901498A1 (de) * 2020-04-21 2021-10-27 Hilti Aktiengesellschaft Elektropneumatisches schlagwerk
EP4324597A1 (de) 2022-08-18 2024-02-21 Hilti Aktiengesellschaft Bohr- oder meisselhammer mit einer vibrationsreduzierten schlagwerkeinheit

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE736794C (de) 1935-04-14 1943-06-28 Siemens Ag Schlagwerkzeug mit Kurbeltrieb
DE1938660C3 (de) * 1969-07-30 1975-05-15 Metabowerke Kg, Closs, Rauch & Schnizler, 7440 Nuertingen Schlagbohrhammer
US3718193A (en) * 1971-02-18 1973-02-27 Bosch Gmbh Robert Cooling system for portable impulse transmitting machines
US3921729A (en) * 1971-11-25 1975-11-25 Hilti Ag Electropneumatic hammer
DE2516406C3 (de) * 1975-04-15 1981-11-19 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3064703D1 (en) * 1979-08-31 1983-10-06 Black & Decker Inc Portable tool such as a rotary hammer or the like
US4462467A (en) * 1981-11-09 1984-07-31 Hilti Aktiengesellschaft Percussion drill machine
SE443940B (sv) * 1982-09-22 1986-03-17 Atlas Copco Ab Slagverktyg drivet av utbytbar motordel
CH648506A5 (fr) 1982-09-22 1985-03-29 Cerac Inst Sa Outil frappeur tenu a la main.
DE3311422A1 (de) * 1983-03-29 1984-10-04 Hilti Ag, Schaan Elektromotorisch betriebenes handgeraet
JPS60108280A (ja) * 1983-11-18 1985-06-13 三菱電機株式会社 電動打撃装置
JPS62192881U (pl) * 1986-05-29 1987-12-08
DE19832946A1 (de) * 1998-07-22 2000-01-27 Hilti Ag Handbohrgerät mit drucklufterregtem Schlagwerk
DE10033362A1 (de) * 2000-07-08 2002-01-17 Hilti Ag Elektrohandwerkzeug mit Leerschlagabschaltung
DE10059747A1 (de) * 2000-12-01 2002-06-06 Hilti Ag Elektrohandwerkzeug mit Sicherheitskupplung
DE60200127T2 (de) * 2001-03-07 2004-06-03 Black & Decker Inc., Newark Hammer
DE10117123A1 (de) * 2001-04-06 2002-10-17 Bosch Gmbh Robert Handwerkzeugmaschine
DE10254813A1 (de) * 2002-11-23 2004-06-03 Hilti Ag Elektrohandwerkzeugmaschine mit schwingungsentkoppelter Schlagwerksbaugruppe

Also Published As

Publication number Publication date
DE10259566A1 (de) 2004-07-01
JP4648624B2 (ja) 2011-03-09
CN1507988A (zh) 2004-06-30
US20040182589A1 (en) 2004-09-23
EP1431005A3 (de) 2009-07-01
EP1431005A2 (de) 2004-06-23
JP2004195648A (ja) 2004-07-15
PL364131A1 (pl) 2004-06-28
PL204879B1 (pl) 2010-02-26
CN100341669C (zh) 2007-10-10
US7048076B2 (en) 2006-05-23

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