GB2433224A - Function selector switch - Google Patents
Function selector switch Download PDFInfo
- Publication number
- GB2433224A GB2433224A GB0624678A GB0624678A GB2433224A GB 2433224 A GB2433224 A GB 2433224A GB 0624678 A GB0624678 A GB 0624678A GB 0624678 A GB0624678 A GB 0624678A GB 2433224 A GB2433224 A GB 2433224A
- Authority
- GB
- United Kingdom
- Prior art keywords
- selector switch
- function
- setting ring
- function selector
- ring
- 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.)
- Granted
Links
- 238000005553 drilling Methods 0.000 claims abstract description 25
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 230000002401 inhibitory effect Effects 0.000 claims description 5
- 230000035515 penetration Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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
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)
Abstract
A function selector switch for setting at least one function in a hand-held machine tool, comprises a setting ring 12 that can be rotated manually about its axis and transferred into at least one torsional position in order to activate a function. A locking device (17, fig 2), which is controlled by the setting ring, acts upon the setting ring for the purpose of holding it in its selected position. The locking device is constructed in such a way that it can automatically drop into a locking position which arrests the setting ring, and can be cancelled again by manually twisting the setting ring out of the torsional position. The machine tool may be one that is capable of drilling, impact drilling, and screwdriving.
Description
<p>ROBERT BOSCH GMBH, 70442 Stuttgart Function selector switch for setting
at least one function in a hand-held machine tool</p>
<p>Prior art</p>
<p>The starting point of the invention is a function selector switch in accordance with the pre-characterising clause of claim 1, for setting at least one function in a hand-held machine tool, in particular for selectively switching the "impact drilling" function on and off in an impact drilling machine.</p>
<p>In a known impact drilling machine having a function selector switch for calling up a number of operating modes (DE 100 06 641 Al), said function selector switch has two adjusting or change-over rings which are disposed side by side on the housing of the machine and are constructed in such a way that one change-over ring calls up the "impact drilling on/off" operating mode in two successive adjusting positions, and the other change-over ring calls up the "drilling" operating mode and the "screwing" operating mode and, in the "screwing" operating mode, predetermines the over-latching or torsional moment of an over-latching clutch via a number of adjusting positions. Also coupled to the two change-over rings is an inhibiting or disengaging device which inhibits the over-latching clutch in the "impact drilling" arid "drilling" operating modes.</p>
<p>In the third adjusting position of the first adjusting ring for calling up the "screwing" operating mode, the disengaging device is deactivated and the over-latching or torsional moment of the over- latching clutch is determined by the clutch spring, the initial tension of which can be set up by means of the second change-over ring.</p>
<p>Advantages of the invention The function selector switch according to the invention having the features in claim 1 has the advantage that the locking device secures the functioning of the hand- held machine tool in the function which has been selected and activated by means of the setting ring, against vibrations, mistakes in handling or other external influences, for example against unintentional twisting of the setting ring as a result of effects emanating from the operating environment. This is of particular importance, particularly for the "impact drilling" function, since in the latter case considerable impact vibrations occur which lead to twisting of the unsecured setting ring and, thereby, to malfunctioning.</p>
<p>Advantageous further developments of, and improvements to, the function selector switch indicated in claim 1 are possible by means of the measures set out in the other claims.</p>
<p>According to one advantageous form of embodiment of the invention, the locking device has a clearance which is disposed in a slide-way constructed on the setting ring, and an axially displaceable locking element which is held in a non-rotatable manner, is constructed for at least partial, form-locking penetration into said clearance, and rests, with axially directed spring force, against said slide-way. This constructional realisation of the locking device is simple in design and robust and has a reliable locking quality.</p>
<p>According to one advantageous form of embodiment of the invention, the locking member is constructed as a sliding wedge which is acted upon by a compression spring and has a wedging angle which points towards the slide-way. The clearance is of triangular design with an angle of the triangle which corresponds to the wedging angle. By setting the wedging angle of the sliding wedge and suitably adapting the triangular angle of the triangular clearance, the manual force which has to be applied in order to unlock the locking device can be adapted to the customer's wishes and an optimum can be achieved between the locking quality and ease of operation.</p>
<p>Drawings The invention is described in greater detail below with the aid of an exemplified embodiment which is represented in the drawings, in which: fig. 1 shows part of an exploded representation of a hand-held machine tool having a function selector switch; and fig. 2 shows part of a schematised plan view of the function selector switch having the locking device.</p>
<p>Description of the exemplified embodiment</p>
<p>With the hand-held machine tool, part of which is shown in an exploded representation in fig. 1, it is possible to switch over, by means of a function selector switch consisting of two setting rings, into three different functions, namely the "impact drilling on/off" function, the "drilling" function and the "screwing" function, it being possible to preselect different quantities of starting torque in the "screwing" function. If this torque is exceeded, an over-latching clutch comes into operation and the screwing tool ceases to be driven.</p>
<p>The hand-held machine tool, part of which is represented in fig. 1, exhibits a guide bush 11 which is fixedly connected to the front region of a machine housing (not represented here) which receives an electric motor and a gear unit. A tool spindle (not represented here) is rotatably mounted in the guide bush 11, and the function selector switch 10 is disposed on said guide bush 11. Said function selector switch 10 has a setting ring for the "drilling" and "screwing" functions, of which ring only a threaded ring 13 is represented, and a setting ring 12 by means of which the "impact drilling" function can be engaged and disengaged again. Said setting ring 12 is constructed in two parts and consists of a manually grippable outer ring 121 and an inner ring 122. Said inner ring 122 is rotatably mounted on the guide bush 11 and connected in a torsion-proof manner to the outer ring 121. The rotationally revolving threaded ring 13, which can be twisted, via the setting ring which is not represented here, for the "drilling" and "screwing" functions, is supported on the inner face of the inner ring 122. on its end face, said inner ring 122 carries two radial cams 14, of which only one radial cam 14 can be seen in fig. 1. Two peripheral cams, which cannot be seen in fig. 1, are positioned on the two radial cams 14 in such a way that, when the setting ring 12 is rotated into its "impact drilling" adjusting position, said peripheral cams each run up onto an inhibiting element 15.</p>
<p>The two inhibiting elements 15 are guided in an axially displaceable manner on the guide bush 11 and pressed, by compression springs 16, against the radial cam 14 on the inner ring 122 and also on the threaded ring 13. As the peripheral cams run up onto the inhibiting elements 15, the latter are pushed back against the force of the compression spring 16 and, in this position, inhibit the over-latching clutch. Furthermore, in this torsional position of the setting ring 12, an actuating unit, which is not represented here, looks after the switching-on of the striking mechanism.</p>
<p>In order to guarantee reliable positioning and holding of the setting ring 12, at least n its torsional position in which the "impact drilling" function is set, a locking device 17 controlled by the setting ring 12 is provided, which acts upon said setting ring 12, that is to say on the inner ring 122 of the latter, and is constructed in such a way that it automatically drops into a locking position which arrests the setting ring 12 when the latter is in the torsional position for the "impact drilling" function, and that said locking position can be cancelled again by manually twisting the setting ring 12 out of said torsional position for the "impact drilling" function. For this purpose, the locking device 17 has at least one clearance 18 which is disposed in the radial cam 14 on the inner ring 122, and an axially displaceable locking element 19 which is held in a non-rotatable manner, is constructed for at least partial, form-locking penetration into the at least one clearance 18, and rests, with axially directed spring force, against said radial cam 14. In the exemplified embodiment in figs. 1 and 2, the locking element 19 is a sliding wedge 21 which is acted upon by a compression spring 20 and has a wedging angle which points towards the setting ring 12. Said sliding wedge 21 is held in an axially displaceable manner on the guide bush 11 in a guide groove 22 which extends in the axial direction. A blind hole 23 is constructed on that closed end 221 of the guide groove 22 which points away from the setting ring 12.</p>
<p>One end of the compression spring 20 is received, preferably in a form-locking manner, in said blind hole 23.</p>
<p>Said compression spring 20 is supported, at one end, on the base 231 of the blind hole 23 and, at the other end, on that end of the sliding wedge 21 which faces away from the wedging angle. Said compression spring 20 is pushed onto a receiving peg 24 which projects from that end of the sliding wedge 21 which faces away from the wedging angle.</p>
<p>The clearance 18 is of triangular construction, with a tip which points in the axial direction and has an angle of the triangle which is adapted to the wedging angle of the sliding wedge 21, so that said sliding wedge 21 is able to at least partially penetrate into the clearance 18 with its wedging angle in a form-locking manner.</p>
<p>If the setting ring 12 is located in any torsional position in which it has switched off the striking mechanism for the "impact drilling" function, the sliding wedge 21 is pressed with its wedging angle against the radial cam 14 on the inner ring 122 by the compression spring 20. The setting ring 12 can be easily twisted in the peripheral direction, it being merely necessary to overcome the frictional force between the tip of the sliding wedge 21 and the radial cam 14. If, when the setting ring 12 is twisted manually, said ring passes into its torsional position in which it switches the striking mechanism into operation, the clearance 18 arrives in the region of the sliding wedge 21 and the latter drops into said clearance 18 under the action of the compression spring 20 and thus locks the setting ring 12 with respect to its rotational movement in the peripheral direction. For turning off the "impact drilling" function, the setting ring 12 must be manually turned back again. As a result of the rotational movement of the inner ring 122 which is thereby initiated, the sliding wedge 21 is pushed back, via its flank, over one face of the triangular clearance 18 against the force of the compression spring 20, until the tip of said sliding wedge 21 rests on the radial cam 14 again. An increased expenditure of manual force is therefore required in order to disengage the "impact drilling" function.</p>
<p>Naturally, it is possible to arrest the setting ring 12 in both torsional positions, that is to say in the "impact drilling off" position as well, by means of the locking device 17. For this purpose, it is merely necessary to provide another clearance 25, which is offset by an angle of rotation, in the radial cam 14 on the inner ring 122 (fig. 1)</p>
Claims (1)
- <p>ROBERT BOSCH GMBH, 70442 Stuttgart Claims 1. Function selector switchfor setting at least one function in a hand-held machine tool, said switch having a setting ring (12) which can be rotated manually about its axis and can be transferred into at least one torsional position which activates a function, characterised in that a locking device (F?) controlled by the setting ring (12) acts upon said setting ring (12) and is constructed in such a way that it automatically drops into a locking position which arrests the setting ring (12) when the latter is in the at least one torsional position, and that said locking position can be cancelled again by manually twisting the setting ring (12) out of the said torsional position.</p><p>2. Function selector switch according to claim 1, characterised in that the locking device (17) has at least one clearance (18) which is disposed in a slide-way constructed on the setting ring (12), and an axially displaceable locking element (19) which is held in a non- rotatable manner, is constructed for at least partial, form-locking penetration into said clearance (18), and rests, with axially directed spring force, against said slide-way.</p><p>3. Function selector switch according to claim 2, characterised in that the locking element (19) is a sliding wedge (21) which is acted upon by a compression spring (20) and has a wedging angle which points towards the setting ring (12), and that the clearance (18) is of triangular construction with an angle of the triangle which corresponds to the wedging angle.</p><p>4. Function selector switch according to claim 3, characterised in that the compression spring (20) is pushed onto a receiving peg (24) which projects axially on that end of the sliding wedge (21) which faces away from the wedging angle, and that said compression spring (20) rests, under pretensioning, against the end of the sliding wedge with one end, and against a spring-supporting system disposed at an axial distance from the receiving peg (24) with the other.</p><p>5. Function selector switch according to claim 3 or 4, characterised in that the setting ring (12) is seated in a rotatable manner on a guide bush (11), and that the sliding wedge (21) is received in a guide groove (22), which extends in the axial direction, in said guide bush (11) 6. Function selector switch according to claim 5, characterised in that a blind hole (23) for receiving one end of the compression spring (20) is constructed in that closed end (221) of the guide groove (22) which points away from the setting ring (12), and that the stop for the spring is formed by the base (231) of the blind hole (23) 7. Function selector switch according to one of claims 1 to 6, characterised in that the setting ring (12) has a first torsional position for the "impact drilling on" function and a second torsional position for the "impact drilling off" function, and that the locking device (17) is operative at least in the first torsional position.</p><p>8. Function selector switch according to one of claims 1 to 6, characterised in that the setting ring (12) has a number of torsional positions for activating one function in each case, and that the locking device (17) is operative in each torsional position.</p><p>9. Function selector switch according to one of claims 1 to 8, characterised in that the setting ring (12) has a manually grippable outer ring (121) and an inner ring (122) which is rigidly coupled to said outer ring (121), and that the slide-way is constructed on said inner ring (122).</p><p>10. Function selector switch according to one of claims 2 to 9, characterised in that the slide-way is formed by a radial cam (14) for actuating inhibiting elements (15) for an over-latching clutch.</p><p>11. A function selector switch substantially as herein described with reference to the drawings.</p><p>12. A hand-held machine tool including a function selector switch according to any one of the preceding claims.</p>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005059182A DE102005059182A1 (en) | 2005-12-12 | 2005-12-12 | Operating mode selector switch for setting at least one operating mode in a handheld power tool |
Publications (3)
Publication Number | Publication Date |
---|---|
GB0624678D0 GB0624678D0 (en) | 2007-01-17 |
GB2433224A true GB2433224A (en) | 2007-06-20 |
GB2433224B GB2433224B (en) | 2008-09-03 |
Family
ID=37711899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0624678A Active GB2433224B (en) | 2005-12-12 | 2006-12-11 | Function selector switch for setting at least one function in a hand-held machine tool |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070163793A1 (en) |
CN (1) | CN1983486B (en) |
DE (1) | DE102005059182A1 (en) |
GB (1) | GB2433224B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2457127A (en) * | 2008-02-03 | 2009-08-05 | Chervon Ltd | Power tool with two adjusting rings for mode selection |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010042682A1 (en) * | 2010-10-20 | 2012-04-26 | Robert Bosch Gmbh | drilling machine |
DE102010063953A1 (en) * | 2010-12-22 | 2012-06-28 | Robert Bosch Gmbh | Hand tool |
JP5759342B2 (en) * | 2011-11-17 | 2015-08-05 | 株式会社マキタ | Hammer drill |
DE102012218882A1 (en) * | 2012-10-17 | 2014-04-17 | Robert Bosch Gmbh | Hand-held power tool device e.g. demolition hammer has stroke unit that transmits drive motion of drive unit to tool holder in driving direction, and locking element that provides positive coupling of tool holder in operating state |
US9186788B2 (en) | 2012-11-15 | 2015-11-17 | Techtronic Power Tools Technology Limited | Lockout mechanism |
GB201505620D0 (en) | 2015-04-01 | 2015-05-13 | Wardley Michael | Specification for method of abandoning a well |
DE102015226091A1 (en) * | 2015-12-18 | 2017-06-22 | Robert Bosch Gmbh | Hand tool with a striking mechanism |
DE102016218535A1 (en) | 2016-09-27 | 2018-03-29 | Robert Bosch Gmbh | Switching device for a portable machine tool, in particular a drill and / or chisel hammer |
DE102020206936A1 (en) * | 2020-02-17 | 2021-08-19 | Robert Bosch Gesellschaft mit beschränkter Haftung | Hand machine tool with a torque adjustment device |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB867627A (en) * | 1957-11-26 | 1961-05-10 | Rawlplug Co Ltd | Improvements in or relating to rotary drill heads |
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 |
AU8831791A (en) * | 1990-12-01 | 1992-06-04 | Hilti Aktiengesellschaft | Drilling and chiselling device |
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 |
EP1234640A1 (en) * | 2001-02-21 | 2002-08-28 | HILTI Aktiengesellschaft | Mode switch for a hand tool |
EP1695796A2 (en) * | 2005-02-24 | 2006-08-30 | Black & Decker, Inc. | Hammer drill with a mode changeover mechanism |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3702291A1 (en) * | 1987-01-27 | 1988-08-04 | Buderus Kuechentechnik | DEVICE FOR ADJUSTING THE SWITCHES AND CONTROL DEVICES OF A HOUSEHOLD APPLIANCE |
CN2256161Y (en) * | 1995-12-07 | 1997-06-11 | 林明宏 | Selecting switch |
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 |
TW554792U (en) * | 2003-01-29 | 2003-09-21 | Mobiletron Electronics Co Ltd | Function switching device of electric tool |
US20060213675A1 (en) * | 2005-03-24 | 2006-09-28 | Whitmire Jason P | Combination drill |
-
2005
- 2005-12-12 DE DE102005059182A patent/DE102005059182A1/en active Pending
-
2006
- 2006-12-11 GB GB0624678A patent/GB2433224B/en active Active
- 2006-12-11 CN CN2006101659149A patent/CN1983486B/en not_active Expired - Fee Related
- 2006-12-12 US US11/609,469 patent/US20070163793A1/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB867627A (en) * | 1957-11-26 | 1961-05-10 | Rawlplug Co Ltd | Improvements in or relating to rotary drill heads |
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 |
AU8831791A (en) * | 1990-12-01 | 1992-06-04 | Hilti Aktiengesellschaft | Drilling and chiselling device |
EP0489687A1 (en) * | 1990-12-01 | 1992-06-10 | HILTI Aktiengesellschaft | Drilling and chiseling tool |
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 |
EP1234640A1 (en) * | 2001-02-21 | 2002-08-28 | HILTI Aktiengesellschaft | Mode switch for a hand tool |
EP1695796A2 (en) * | 2005-02-24 | 2006-08-30 | Black & Decker, Inc. | Hammer drill with a mode changeover mechanism |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2457127A (en) * | 2008-02-03 | 2009-08-05 | Chervon Ltd | Power tool with two adjusting rings for mode selection |
Also Published As
Publication number | Publication date |
---|---|
DE102005059182A1 (en) | 2007-06-14 |
CN1983486B (en) | 2012-08-22 |
GB2433224B (en) | 2008-09-03 |
GB0624678D0 (en) | 2007-01-17 |
US20070163793A1 (en) | 2007-07-19 |
CN1983486A (en) | 2007-06-20 |
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