EP1182012A2 - Outil électrique à main avec mécanisme à percussion électropneumatique - Google Patents

Outil électrique à main avec mécanisme à percussion électropneumatique Download PDF

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Publication number
EP1182012A2
EP1182012A2 EP01810685A EP01810685A EP1182012A2 EP 1182012 A2 EP1182012 A2 EP 1182012A2 EP 01810685 A EP01810685 A EP 01810685A EP 01810685 A EP01810685 A EP 01810685A EP 1182012 A2 EP1182012 A2 EP 1182012A2
Authority
EP
European Patent Office
Prior art keywords
bearing
hand tool
tool device
electric hand
roller bearing
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Withdrawn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
EP01810685A
Other languages
German (de)
English (en)
Other versions
EP1182012A3 (fr
Inventor
Erwin Manschitz
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 EP1182012A2 publication Critical patent/EP1182012A2/fr
Publication of EP1182012A3 publication Critical patent/EP1182012A3/fr
Withdrawn legal-status Critical Current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
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • 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
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/068—Crank-actuated impulse-driving mechanisms
    • 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
    • B25D2250/331—Use of bearings

Definitions

  • the invention relates to an electric hand tool device such as a rotary hammer or Chisel hammer with an electro-pneumatic hammer mechanism with crank gear for Generation of an at least partially striking movement of a recorded one Tool.
  • an electropneumatic striking mechanism In the case of an electropneumatic striking mechanism, it is powered by an electric drive generated rotary motion is transformed into a reciprocating motion of an excitation piston, which ultimately generates axial impacts on the tool via a gas spring.
  • a crankshaft is mounted on one side in double bearings in radial roller bearings with a gear arranged at a free end through an engaging drive shaft pinion driven, the gear designed as an eccentric parallel and includes eccentrically offset eccentric, which is axially over the free end extends and into a connecting rod of an exciter piston of a pneumatic Percussion mechanism intervenes.
  • the disadvantage of this solution is that of the radial Crank forces on the eccentric pin are transmitted to the radial roller bearings via the long lever arm acting high bending moments.
  • the crankshaft which is driven by a gearwheel, is cup-shaped and according to DE4300021A1 sleeve-shaped and coaxial on the inside with the bearing journal is firmly connected on one side twice as a needle bearing trained radial roller bearings, with a first radial roller bearing in the plane of Gear and a second radial roller bearing adjacent to an end cam is arranged, which is an axially projecting, radially eccentrically offset Includes eccentric pin.
  • the object of the invention is to realize a crank drive for a pneumatic Impact mechanism of an electric hand tool device with a low bending moment of the stored waves. Another aspect is the shortening of the crank drive required axial length.
  • a pneumatic striking mechanism it is essentially an electric hand tool device a radial portion of a shaft of the crank drive within an axial bearing area designed as a bearing means in the form of a roller bearing ring of a radial roller bearing, whereby a radial nesting of at least one storage means of the Shaft is formed with at least one additional means for an additional function. Since this Additive thus does not require an additional axial length range of the shaft, this is shorter realizable, which results in lower bending moments and that for the crank drive required axial length is shortened.
  • the drive shaft includes an end permanently mountable drive pinion, which is radially outside in an axial bearing area Inner bearing ring of a radial roller bearing and a mounting hole in the coaxial interior forms in which a stub shaft of the remaining drive shaft, advantageously the rotor shaft of the electric drive, is attached coaxially engaging non-positively or positively.
  • crankshaft the radial roller bearing radially inside as well as in the plane arranged of the gear
  • the crankshaft designed as an eccentric one includes axially projecting, radially free eccentric pin.
  • the gear shows advantageously an axial, annular groove on the side opposite the eccentric on, the inner shell of which receives the outer bearing ring of the radial roller bearing in a non-positive manner.
  • a driven by a gear is in the Housing of the electric hand-held tool crankshaft with two bearings Eccentric connected, which the axially projecting, radially free eccentric pin includes, the eccentric in the radially outer area the inner ring of a radial roller bearing formed.
  • the advantageously arranged between two radial roller bearings, driven Gear is also advantageously associated with a gear wheel, which has a rotary drive shaft drives the tool spindle of the handheld power tool via a bevel gear rotates.
  • crankshaft, the eccentric and / or the one that can be mounted on the drive shaft Drive pinions are advantageous with a shape suitable for the extrusion process without Undercuts formed with respect to the axis of rotation.
  • Electric hand tool device within an axial bearing area 2 of a drive shaft 3 of the crank drive, which includes a drive pinion 4 which can be permanently mounted at the end radial section of the drive pinion 4 of the drive shaft 3 an inner bearing ring 5 one as Radial roller bearing 6 executed as a bearing means and coaxial inside forms a mounting hole 7 as an additive, in which a stub shaft 8 Rotor shaft 9 of the electric drive 10 is fixed coaxially engaging.
  • crankshaft 14 is the radial roller bearing 6' arranged radially inside and in the plane of the gear 11, the front as an eccentric 15 formed crankshaft 14 an axially projecting, radially free Includes eccentric pin 16.
  • the gear wheel 11 faces the eccentric pin 16 opposite side on an axial, annular groove 17, the inner lateral surface receives an outer bearing ring 18 of the radial roller bearing 6 'non-positively. That on the Drive shaft 3 mountable drive pinion 4 and the crankshaft 14 are without undercuts with respect to an axis of rotation A, B.
  • Electric hand tool device double-mounted crankshaft 14 with the eccentric 15th connected which contains the axially projecting, radially free eccentric pin 16, the eccentric 15 in the radially outer region of the inner bearing ring 5 'of the radial roller bearing 6 ".
  • a gear gear 20 assigned which drives a rotary drive shaft 21, which via a bevel gear Tool spindle of the electrical hand tool device rotates.
  • the eccentric 15 is without undercuts with respect to an axis of rotation B '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Retarders (AREA)
  • Drilling And Boring (AREA)
EP01810685A 2000-07-18 2001-07-09 Outil électrique à main avec mécanisme à percussion électropneumatique Withdrawn EP1182012A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10034795 2000-07-18
DE10034795A DE10034795A1 (de) 2000-07-18 2000-07-18 Elektrohandwerkzeuggerät mit elektropneumatischen Schlagwerk

Publications (2)

Publication Number Publication Date
EP1182012A2 true EP1182012A2 (fr) 2002-02-27
EP1182012A3 EP1182012A3 (fr) 2004-01-14

Family

ID=7649251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01810685A Withdrawn EP1182012A3 (fr) 2000-07-18 2001-07-09 Outil électrique à main avec mécanisme à percussion électropneumatique

Country Status (5)

Country Link
US (1) US20020050367A1 (fr)
EP (1) EP1182012A3 (fr)
JP (1) JP2002066958A (fr)
CN (1) CN1333111A (fr)
DE (1) DE10034795A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007090478A1 (fr) * 2006-02-09 2007-08-16 Robert Bosch Gmbh Outil manuel motorise, en particulier foreuse a percussion et/ou marteau-piqueur
EP3901498A1 (fr) * 2020-04-21 2021-10-27 Hilti Aktiengesellschaft Mécanisme de percussion électropneumatique

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009001657A1 (de) * 2009-03-19 2010-09-23 Robert Bosch Gmbh Handwerkzeugmaschine
US8636081B2 (en) 2011-12-15 2014-01-28 Milwaukee Electric Tool Corporation Rotary hammer
JP2014048143A (ja) * 2012-08-31 2014-03-17 Hitachi High-Technologies Corp 分光光度計
CN104227666A (zh) * 2013-06-20 2014-12-24 苏州宝时得电动工具有限公司 一种电动榔头
EP2857149A1 (fr) * 2013-10-03 2015-04-08 HILTI Aktiengesellschaft Machine-outil manuelle
GB201421576D0 (en) 2014-12-04 2015-01-21 Black & Decker Inc Drill
GB201421577D0 (en) * 2014-12-04 2015-01-21 Black & Decker Inc Drill

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3505544A1 (de) * 1985-02-18 1986-08-21 Hilti Ag, Schaan Bohrhammer
DE9208407U1 (de) * 1992-06-24 1993-10-21 Robert Bosch Gmbh, 70469 Stuttgart Elektrische Handwerkzeugmaschine
US5871059A (en) * 1995-02-28 1999-02-16 Makita Corporation Mechanism for preventing idling strikes in power-driven striking tools
DE19820218A1 (de) * 1998-05-06 1999-12-02 Wacker Werke Kg Schlag- und/oder Bohrhammer mit axial gleitgelagerter Kurbelwelle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3505544A1 (de) * 1985-02-18 1986-08-21 Hilti Ag, Schaan Bohrhammer
DE9208407U1 (de) * 1992-06-24 1993-10-21 Robert Bosch Gmbh, 70469 Stuttgart Elektrische Handwerkzeugmaschine
US5871059A (en) * 1995-02-28 1999-02-16 Makita Corporation Mechanism for preventing idling strikes in power-driven striking tools
DE19820218A1 (de) * 1998-05-06 1999-12-02 Wacker Werke Kg Schlag- und/oder Bohrhammer mit axial gleitgelagerter Kurbelwelle

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Single Row Needle Roller Bearings" ZKL ONLINE BEARINGS CATALOGUE, [Online] XP002257932 Gefunden im Internet: <URL:http://www.zkl.cz/bearings/catalogue/ 71.htm> [gefunden am 2003-10-15] *
CARVILL, J: "The Student Engineer's Companion" , BUTTERWORTHS , LONDON XP002257933 * Seite 45, rechte Spalte, Zeile 6 - letzte Zeile * * Abbildung 1.200 * *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007090478A1 (fr) * 2006-02-09 2007-08-16 Robert Bosch Gmbh Outil manuel motorise, en particulier foreuse a percussion et/ou marteau-piqueur
EP3901498A1 (fr) * 2020-04-21 2021-10-27 Hilti Aktiengesellschaft Mécanisme de percussion électropneumatique
WO2021213804A1 (fr) * 2020-04-21 2021-10-28 Hilti Aktiengesellschaft Mécanisme de percussion électropneumatique

Also Published As

Publication number Publication date
US20020050367A1 (en) 2002-05-02
DE10034795A1 (de) 2002-02-21
JP2002066958A (ja) 2002-03-05
CN1333111A (zh) 2002-01-30
EP1182012A3 (fr) 2004-01-14

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