EP1537955A2 - Bohrhammer - Google Patents

Bohrhammer Download PDF

Info

Publication number
EP1537955A2
EP1537955A2 EP20040257265 EP04257265A EP1537955A2 EP 1537955 A2 EP1537955 A2 EP 1537955A2 EP 20040257265 EP20040257265 EP 20040257265 EP 04257265 A EP04257265 A EP 04257265A EP 1537955 A2 EP1537955 A2 EP 1537955A2
Authority
EP
European Patent Office
Prior art keywords
rotary
pinion
control button
slide
hammer drill
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Withdrawn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
EP20040257265
Other languages
English (en)
French (fr)
Inventor
Sang Positec Power Tools Shuhua
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.)
Positec Power Tools Suzhou Co Ltd
Original Assignee
Positec Power Tools Suzhou Co Ltd
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 Positec Power Tools Suzhou Co Ltd filed Critical Positec Power Tools Suzhou Co Ltd
Publication of EP1537955A2 publication Critical patent/EP1537955A2/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Withdrawn legal-status Critical Current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
    • 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
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0015—Tools having a percussion-only mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0023—Tools having a percussion-and-rotation mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0038—Tools having a rotation-only mode

Definitions

  • the present invention relates to a hammer drill, more particularly to a hammer drill which can perform three functions, namely drill, hammer and hammer/drill functions.
  • the present invention relates to a three-function hammer drill whose control mechanism for shifting between different work modes is simple.
  • a hammer drill comprising:
  • control mechanism of the present invention for shifting between different work modes is simple and straightforwardly manufactured.
  • the transmitting mechanism transmits linear drive from the linear drive mechanism to the aiguille (ie in a hammer action).
  • the linear drive mechanism is a piston.
  • the transmitting mechanism is a cylinder.
  • the transmitting mechanism transmits rotary drive from the intermediate rotary shaft to the aiguille (ie in a drill action).
  • the gear is movable along the axial direction of the transmitting mechanism.
  • the guide device is fixed substantially longitudinally on the shell.
  • the guide device is a linear guide device.
  • the guide device is elongate.
  • the slide device is adapted to linearly reciprocate rotary movement of the control button slidably along the guide device so as to selectively engage or disengage the gear and the third pinion or to selectively engage or disengage the teeth and the sleeve.
  • control button further comprises:
  • a first resilient member urges the sleeve and clutch into engagement.
  • a second resilient member urges the gear and the third pinion into engagement.
  • the clutch comprises teeth.
  • the slide device defines an access hole through which the guide device passes as the slide device slides along the guide device.
  • control button further comprises: a fastening device, wherein the shell comprises: a locking device for engaging the fastening device to lock the slide device relative to the guide device.
  • the fastening device may be mounted substantially coaxially with the rotary control button.
  • a third resilient member (eg spring) is disposed between the fastening device and the rotary control button, wherein the third resilient member urges the fastening device into engagement with the locking device.
  • the locking device comprises at least three locking channels (eg on the shell) for selectively engaging the fastening device to lock the slide device relative to the guide device in at least three positions (ie the positions corresponding to the drilling mode, the hammer mode and the drilling and hammer mode respectively).
  • Fig. 1 shows a hammer drill in accordance with an embodiment of the invention comprising a shell 10 and a motor 20 disposed in the shell 10.
  • the motor 20 comprises an output rotary shaft 21 with a first pinion 22 thereon.
  • An intermediate rotary shaft 30 is disposed parallel to the output rotary shaft 20 and comprises a second pinion 32 engaged with the first pinion 22 to transmit rotary power from the output rotary shaft 20 to the intermediate rotary shaft 30 and to a third pinion 31.
  • a swing link comprises a bearing 40 having a sleeve 43 engaged with teeth 33 on the intermediate rotary shaft 30 and a connecting bar 41 connected to a piston 60.
  • a first spring 42 is interposed between the bearing 40 and the intermediate rotary shaft 30 to urge the sleeve 43 and the teeth 33 into engagement so that the teeth 33 and the sleeve 43 perform a clutch function.
  • a cylinder 50 covers the piston 60 and comprises a gear 51 engaged with the third pinion 31.
  • the gear 51 can move along the axis of the cylinder 50.
  • a second spring 52 is disposed on one side of the gear 51 to bring the gear 51 and the third pinion 31 into engagement so as to transmit rotary power from the intermediate rotary shaft 30 to the cylinder 50.
  • the cylinder 50 is driven linearly by the piston 60.
  • a collet 70 is mounted on one end of the cylinder 50 and an aiguille 80 is gripped in the collet 70.
  • the hammer drill further comprises a control mechanism 100 which is shown in outline in Figures 2, 4 and 6, in cross-section in Figures 3, 5 and 7 and in situ in Figure 8.
  • the control mechanism 100 itself comprises a rotary control button 110, a guide device 120 and a slide device 130.
  • the rotary control button 110 has an eccentric shaft 111 parallel to its rotary axis.
  • the slide device 130 defines a slide channel 131 which receives the eccentric shaft 111 and an access hole 132 through which the guide device 120 passes.
  • the eccentric shaft 111 translates rotary motion of the rotary control button 110 into a linear displacement of the slide device 130 along the guide device 120.
  • the slide device 130 also comprises a first pushing bar 133 and a second pushing bar 134.
  • the eccentric shaft 111 rotates eccentrically and is displaced in a relative horizontal direction.
  • the first pushing bar 133 and the second pushing bar 134 move to push the gear 51 and sleeve 43 respectively and this serves to disengage the gear 51 from the third pinion 31 and the teeth 33 from the sleeve 43.
  • the control button 110 is rotated to move the slide device 130 to the left.
  • the first pushing bar 133 moves to push the gear 51 which disengages the third pinion 31.
  • the cylinder 50 loses rotary power and the aiguille 80 cannot drill.
  • the sleeve 43 and the teeth 33 remain engaged so the aiguille 80 can hammer ( ie the hammer mode).
  • the control button 110 is rotated to move the slide device 130 to the right.
  • the second pushing bar 134 moves to push the sleeve 43 which disengages the teeth 33.
  • the swing link 40 loses power and the aiguille 80 can not hammer.
  • the gear 51 and the third pinion 31 remain engaged so the aiguille 80 can drill.
  • the rotary control button 110 pivotally engages the shell 10 via an axial bolt 112.
  • the shell 10 comprises three locking devices 11 to engage a fastening device 113 in three different positions respectively.
  • a third spring 114 is disposed between the fastening device 113 and the rotary control button 110.
  • Each of the locking devices 11 defines a groove for receiving the fastening device 113.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
  • Earth Drilling (AREA)
EP20040257265 2003-12-02 2004-11-23 Bohrhammer Withdrawn EP1537955A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNU2003201202169U CN2661382Y (zh) 2003-12-02 2003-12-02 锤钻
CH320120216 2003-12-02

Publications (1)

Publication Number Publication Date
EP1537955A2 true EP1537955A2 (de) 2005-06-08

Family

ID=34347932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040257265 Withdrawn EP1537955A2 (de) 2003-12-02 2004-11-23 Bohrhammer

Country Status (2)

Country Link
EP (1) EP1537955A2 (de)
CN (1) CN2661382Y (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000545A1 (de) * 2006-06-27 2008-01-03 Robert Bosch Gmbh Elektrohandwerkzeug
JP2009279738A (ja) * 2008-05-26 2009-12-03 Max Co Ltd 駆動工具
CN105515287A (zh) * 2016-02-01 2016-04-20 浙江绿动电机科技有限公司 水钻工具
JP2016129911A (ja) * 2015-01-13 2016-07-21 株式会社マキタ 電動工具
WO2017073236A1 (ja) * 2015-10-30 2017-05-04 日立工機株式会社 ハンマドリル
US10046450B2 (en) 2014-07-28 2018-08-14 Black & Decker Inc. Mode change knob assembly
CN110153960A (zh) * 2018-02-14 2019-08-23 苏州宝时得电动工具有限公司 冲击工具
WO2021036095A1 (zh) * 2019-08-28 2021-03-04 浙江信源电器制造有限公司 一种新型电锤

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100420531C (zh) * 2005-05-26 2008-09-24 松下电工株式会社 锤钻
CN2920563Y (zh) * 2006-07-11 2007-07-11 王文江 轻型单钮四功能电锤
DE102008040031A1 (de) * 2008-06-30 2009-12-31 Robert Bosch Gmbh Mehrgang-Getriebevorrichtung und Werkzeugmaschine
DE102008054692A1 (de) 2008-12-16 2010-06-17 Robert Bosch Gmbh Handwerkzeugmaschine
CN105569558A (zh) * 2016-03-07 2016-05-11 湖州中辰建设有限公司 一种带有气动活塞装置的冲击钻
CN214723942U (zh) * 2019-12-09 2021-11-16 苏州宝时得电动工具有限公司 电锤

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000545A1 (de) * 2006-06-27 2008-01-03 Robert Bosch Gmbh Elektrohandwerkzeug
JP2009279738A (ja) * 2008-05-26 2009-12-03 Max Co Ltd 駆動工具
US10046450B2 (en) 2014-07-28 2018-08-14 Black & Decker Inc. Mode change knob assembly
JP2016129911A (ja) * 2015-01-13 2016-07-21 株式会社マキタ 電動工具
WO2017073236A1 (ja) * 2015-10-30 2017-05-04 日立工機株式会社 ハンマドリル
CN105515287A (zh) * 2016-02-01 2016-04-20 浙江绿动电机科技有限公司 水钻工具
CN110153960A (zh) * 2018-02-14 2019-08-23 苏州宝时得电动工具有限公司 冲击工具
WO2021036095A1 (zh) * 2019-08-28 2021-03-04 浙江信源电器制造有限公司 一种新型电锤

Also Published As

Publication number Publication date
CN2661382Y (zh) 2004-12-08

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