US20070163793A1 - Operating mode switch for setting at least one operating mode in a hand-held power tool - Google Patents

Operating mode switch for setting at least one operating mode in a hand-held power tool Download PDF

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Publication number
US20070163793A1
US20070163793A1 US11/609,469 US60946906A US2007163793A1 US 20070163793 A1 US20070163793 A1 US 20070163793A1 US 60946906 A US60946906 A US 60946906A US 2007163793 A1 US2007163793 A1 US 2007163793A1
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US
United States
Prior art keywords
operating mode
adjustment ring
ring
mode switch
rotational position
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.)
Abandoned
Application number
US11/609,469
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English (en)
Inventor
Bruno Aeberhard
Felix Buehlmann
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.)
Robert Bosch GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AEBERHARD, BRUNO, BUEHLMANN, FELIX
Publication of US20070163793A1 publication Critical patent/US20070163793A1/en
Abandoned 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • 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 is based on an operating mode switch for setting at least one operating mode in a hand-held power tool, in particular for selectively turning the “impact drilling” mode on or off in an impact drill.
  • the operating mode switch includes two adjustment or switching rings which are located next to each other on the machine housing and are designed such that one switching ring, in two consecutive setting positions, selects the “impact drilling on/off” mode, and the other switching ring selects the “drill” mode” and the “screw” mode, and, in the “screw” mode, the disengagement torque or rotational torque of a safety clutch is specified via several setting positions.
  • a blocking or disengagement device is coupled with both switching rings, which blocks the safety clutch in the “impact drilling” and “drill” modes.
  • the disengagement device is deactivated in the third setting position of the first setting ring for selecting the “screw” mode, and the disengagement torque or rotational torque of the safety clutch is determined by the coupling spring, the preload of which is adjustable using the second switching ring.
  • an object of the present invention to provide an operating mode switch for setting at least one operating mode in a hand-held power tool, which eliminates the disadvantages of the prior art.
  • an operating mode switch for setting at least one operating mode in a hand-held power tool, comprising an adjustment ring rotatable manually around its axis and movable into at least one rotational position which activates an operating mode; and a locking device controlled by said adjustment ring and engaging in said adjustment ring, said locking device being configured such that in the at least one rotational position of said adjustment ring it automatically falls into a locking position which locks said adjustment ring in position, while said adjustment ring is engageable from said at least one rotational position by manually rotating said adjustment ring.
  • the locking device ensures the functionality of the hand-held power tool in the selected operating mode—which is activated using the setting ring—despite vibrations, handling errors, and other external influences, e.g., accidental rotation of the setting ring caused by circumstances in the operating environment. This is particularly significant for the “impact drilling” mode, since considerable impact-related vibrations are produced in this case, which cause the unsecured setting ring to rotate, thereby resulting in malfunction.
  • the locking device includes at least one recess located in a sliding track formed in the adjustment ring, and an axially displaceable, non-rotatably held locking element designed to at least partially engage in the recess in a form-fit manner and which bears against the sliding track with an axially directed spring force.
  • This design of the locking device is simple and robust, and it ensures reliable locking quality.
  • the locking element is designed as a sliding wedge which is acted upon by a compression spring and includes a wedge angle pointing toward the sliding track.
  • This recess is triangular, with a triangular angle corresponding to the wedge angle.
  • FIG. 1 shows an exploded view, in sections, of a hand-held power tool with an operating mode switch in accordance with the present embodiment
  • FIG. 2 shows a section of a schematized top view of the operating mode switch with locking device in accordance with the present embodiment.
  • the hand-held power tool shown in an exploded view, in sections, in FIG. 1 it is possible to switch to three different operating modes, i.e., the “impact drilling on/off” mode, the “drill” mode, and the “screw” mode, using an operating mode switch composed of two adjustment rings.
  • the “screw” mode it is possible to preselect various starting torques. If this torque is exceeded, a safety clutch is activated, and the screwing tool cannot be driven.
  • the section of the hand-held power tool shown in FIG. 1 shows a guide sleeve 11 which is fixedly connected with the front region of a machine housing (not shown here) which accommodates an electric motor and a gearbox.
  • a tool spindle (not shown here) is rotatably supported in guide sleeve 11
  • operating mode switch 10 is located on guide sleeve 11 .
  • Operating mode switch 10 includes a setting ring for the “drill” and “screw” modes—and only one threaded ring 13 is shown—and a setting ring 12 with which the “impact drilling” mode can be engaged and disengaged.
  • Setting ring 12 has a two-component design and is composed of a manually holdable outer ring 121 and an inner ring 122 .
  • Inner ring 122 is rotatably supported on guide sleeve 11 and is rotatably connected with outer ring 121 .
  • Rotatable threaded ring 13 bears against the inner surface of inner ring 122 and can be rotated using the setting ring (not shown here) for the “drill” and “screw” modes.
  • Inner ring 122 has two control curves 14 on its front side. Only control curve 14 is shown in FIG. 1 .
  • Two control cams, which are not shown in FIG. 1 are positioned on both control curves 14 such that, when setting ring 12 is rotated into its “impact drilling” position, the control cams each run up onto a blocking element 15 .
  • Both blocking elements 15 are guided on guide sleeve 11 in an axially displaceable manner and are pressed via compression springs 16 against control curve 14 of inner ring 122 and threaded ring 13 .
  • the control cams run onto blocking elements 15 , the latter are pushed back against the force of compression spring 16 and block the safety clutch in this position.
  • an actuating unit which is not shown here—switches on the impact mechanism.
  • a locking device 17 controlled by setting ring 12 which engages in setting ring 12 and, in fact, in inner ring 122 of setting ring 12 , and it designed such that, in the rotational position of setting ring 12 for the “impact drilling” mode, it automatically falls into a locking position which locks setting ring 12 in position, and the locking position can be disengaged by manually rotating setting ring 12 out of the rotational position for the “impact drilling” mode.
  • locking device 17 includes at least one recess 18 located in control curve 14 of inner ring 122 , and an axially displaceable, non-rotatably held locking element 19 designed to at least partially engage in the at least one recess 18 in a form-fit manner and which bears against the control curve 14 with axially directed spring force.
  • locking element 19 is a sliding wedge 21 which is acted upon by a compression spring 20 and has a wedge angle which points toward setting ring 12 .
  • Sliding wedge 20 is held in an axially displaceble manner in a guide groove 22 —which extends in the axial direction—on guide sleeve 11 .
  • a blind hole 23 is formed in groove end 221 of guide groove 22 pointing away from setting ring 12 .
  • One end of compression spring 20 is preferably accommodated in a form-fit manner in blind hole 23 .
  • Compression spring 20 bears against hole base 231 of blind hole 23 and against the end of sliding wedge 21 facing away from the wedge angle.
  • Compression spring 20 is slid onto a mounting peg 24 which projects out of the end of sliding wedge 21 facing away from the wedge angle.
  • Recess 18 is designed triangular in shape with a triangle tip pointing in the axial direction, the triangle tip having a triangular angle which corresponds to the wedge angle of sliding wedge 21 , so that sliding wedge 21 can engage in recess 18 via its wedge angle, at least partially, and in a form-fit manner.
  • setting ring 12 If setting ring 12 is located in any rotational position in which it has switched off the impact mechanism for the “impact drilling” mode, sliding wedge 21 is pressed via its wedge angle by compression spring 20 against control curve 14 on inner ring 122 .
  • Setting ring 12 can be easily rotated in the circumferential direction, and it is only necessary to overcome the frictional force between the tip of sliding wedge 21 and control curve 14 . If, when setting ring 12 is rotated manually, it reaches its rotational position in which it activates the impact mechanism, recess 18 reaches the region of sliding wedge 21 , and the latter falls—via action of compression spring 20 —into recess 18 , thereby locking setting ring 12 relative to its rotation in the circumferential direction.
  • setting ring 12 is rotated back manually. Due to the resultant rotational motion of inner ring 122 , via one triangular surface of triangular recess 18 , sliding wedge 21 is pushed back via its wedge flank against the force of compression spring 20 until the wedge tip of sliding wedge 21 rests against control curve 14 again. A greater amount of manual force is therefore required to disengage the “impact drilling” mode.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
US11/609,469 2005-12-12 2006-12-12 Operating mode switch for setting at least one operating mode in a hand-held power tool Abandoned US20070163793A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005059182.5 2005-12-12
DE102005059182A DE102005059182A1 (de) 2005-12-12 2005-12-12 Betriebsartenumschalter zum Einstellen mindestens einer Betriebsart in einer Handwerkzeugmaschine

Publications (1)

Publication Number Publication Date
US20070163793A1 true US20070163793A1 (en) 2007-07-19

Family

ID=37711899

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/609,469 Abandoned US20070163793A1 (en) 2005-12-12 2006-12-12 Operating mode switch for setting at least one operating mode in a hand-held power tool

Country Status (4)

Country Link
US (1) US20070163793A1 (de)
CN (1) CN1983486B (de)
DE (1) DE102005059182A1 (de)
GB (1) GB2433224B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013107142A (ja) * 2011-11-17 2013-06-06 Makita Corp ハンマードリル
US20130269461A1 (en) * 2010-10-20 2013-10-17 Joachim Hecht Power drill
US20130333907A1 (en) * 2010-12-22 2013-12-19 Joachim Hecht Hand-held power tool
US9186788B2 (en) 2012-11-15 2015-11-17 Techtronic Power Tools Technology Limited Lockout mechanism
US10989017B2 (en) 2015-04-01 2021-04-27 Ardyne Holdings Limited Method of abandoning a well
US20230072710A1 (en) * 2020-02-17 2023-03-09 Robert Bosch Gmbh Hand-Held Power Tool having a Torque Setting Device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201220406Y (zh) * 2008-02-03 2009-04-15 南京德朔实业有限公司 一种电动工具
DE102012218882A1 (de) * 2012-10-17 2014-04-17 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
DE102015226091A1 (de) * 2015-12-18 2017-06-22 Robert Bosch Gmbh Handwerkzeugmaschine mit einem Schlagwerk
DE102016218535A1 (de) 2016-09-27 2018-03-29 Robert Bosch Gmbh Schaltvorrichtung für eine tragbare Werkzeugmaschine, insbesondere einen Bohr- und/oder Meißelhammer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6142242A (en) * 1999-02-15 2000-11-07 Makita Corporation Percussion driver drill, and a changeover mechanism for changing over a plurality of operating modes of an apparatus
US20020014343A1 (en) * 2000-06-26 2002-02-07 Josef Funfer Rotary switch for a hand-held power tool and a switching device including the rotary switch
US6610938B2 (en) * 2001-02-21 2003-08-26 Hilti Aktiengesellschaft Rotary mode change switch for a hand tool
US6688406B1 (en) * 2003-01-29 2004-02-10 Mobiletron Electronics Co., Ltd. Power tool having a function control mechanism for controlling operation in one of rotary drive and hammering modes

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NL232950A (de) * 1957-11-26
GB1088003A (en) * 1964-08-04 1967-10-18 John M Perkins & Smith Ltd Load transmitting device
GB1195505A (en) * 1967-07-31 1970-06-17 Hilti Ag Hammer Drill
DE3702291A1 (de) * 1987-01-27 1988-08-04 Buderus Kuechentechnik Vorrichtung zum einstellen der schalter und regelvorrichtungen eines haushaltgeraetes
DE4038395A1 (de) * 1990-12-01 1992-06-04 Hilti Ag Bohr- und meisselgeraet
CN2256161Y (zh) * 1995-12-07 1997-06-11 林明宏 选择开关
US7314097B2 (en) * 2005-02-24 2008-01-01 Black & Decker Inc. Hammer drill with a mode changeover mechanism
US20060213675A1 (en) * 2005-03-24 2006-09-28 Whitmire Jason P Combination drill

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6142242A (en) * 1999-02-15 2000-11-07 Makita Corporation Percussion driver drill, and a changeover mechanism for changing over a plurality of operating modes of an apparatus
US20020014343A1 (en) * 2000-06-26 2002-02-07 Josef Funfer Rotary switch for a hand-held power tool and a switching device including the rotary switch
US6610938B2 (en) * 2001-02-21 2003-08-26 Hilti Aktiengesellschaft Rotary mode change switch for a hand tool
US6688406B1 (en) * 2003-01-29 2004-02-10 Mobiletron Electronics Co., Ltd. Power tool having a function control mechanism for controlling operation in one of rotary drive and hammering modes

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130269461A1 (en) * 2010-10-20 2013-10-17 Joachim Hecht Power drill
US9878434B2 (en) * 2010-10-20 2018-01-30 Robert Bosch Gmbh Power drill
US20130333907A1 (en) * 2010-12-22 2013-12-19 Joachim Hecht Hand-held power tool
US9849574B2 (en) * 2010-12-22 2017-12-26 Robert Bosch Gmbh Hand-held power tool
JP2013107142A (ja) * 2011-11-17 2013-06-06 Makita Corp ハンマードリル
US9186788B2 (en) 2012-11-15 2015-11-17 Techtronic Power Tools Technology Limited Lockout mechanism
US10179383B2 (en) 2012-11-15 2019-01-15 Techtronic Power Tools Technology Limited Lockout mechanism
US10989017B2 (en) 2015-04-01 2021-04-27 Ardyne Holdings Limited Method of abandoning a well
US20230072710A1 (en) * 2020-02-17 2023-03-09 Robert Bosch Gmbh Hand-Held Power Tool having a Torque Setting Device

Also Published As

Publication number Publication date
DE102005059182A1 (de) 2007-06-14
CN1983486B (zh) 2012-08-22
GB2433224B (en) 2008-09-03
GB2433224A (en) 2007-06-20
GB0624678D0 (en) 2007-01-17
CN1983486A (zh) 2007-06-20

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:AEBERHARD, BRUNO;BUEHLMANN, FELIX;REEL/FRAME:019105/0394

Effective date: 20061221

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION