EP3612352A2 - Staubhaube für einen trennschleifer - Google Patents
Staubhaube für einen trennschleiferInfo
- Publication number
- EP3612352A2 EP3612352A2 EP18724784.6A EP18724784A EP3612352A2 EP 3612352 A2 EP3612352 A2 EP 3612352A2 EP 18724784 A EP18724784 A EP 18724784A EP 3612352 A2 EP3612352 A2 EP 3612352A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- dust hood
- flap
- contact
- sensor unit
- grinder
- 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
- 239000000428 dust Substances 0.000 title claims abstract description 72
- 238000005520 cutting process Methods 0.000 title claims abstract description 51
- 230000004888 barrier function Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 12
- 238000000926 separation method Methods 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/04—Protective covers for the grinding wheel
- B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
- B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/028—Angle tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/06—Grinders for cutting-off
- B24B27/08—Grinders for cutting-off being portable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
- B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
- B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
Definitions
- the present invention relates to a dust hood with a flange for attaching the dust hood to a gear neck of a cutting grinder.
- the dust hood is equipped with a hood body for at least sections, covering both sides of a circular cutting disc, and with a suction nozzle for connecting a suction hose. About the suction hose, a background abrasion can be sucked out of the hood body.
- Dust hoods of the type mentioned are basically known from the prior art. They serve to prevent dust spreading during cutting operations in order to protect the health of a user of the cut-off grinder.
- the dust hood has a sensor unit, by means of which it can be detected whether the suction hose is connected to the suction nozzle and / or whether a flap of the suction nozzle is open.
- the invention includes the realization that cut-off grinders are put into practical use, that is to say for example in dry cutting, both with dust extraction and without dust extraction.
- dry cutting without dust extraction a circular cutting disc of the cutting grinder typically rotates in the same direction of rotation to keep a subsurface away from the user of the cutting grinder.
- the cutting wheel is typically driven in the opposite direction of rotation, which allows better control of the kerf. It has been recognized that the ability to operate a power cutter in various directions of rotation can lead to operator errors, which in turn impose an undesirable level of dust on the user. This is the case, for example, when the flap of the suction nozzle is opened and no suction hose is connected to the suction nozzle.
- the dust hood of the invention provides a basis for avoiding such operator errors.
- the inventively provided sensor unit can, for example, purpose Direction of rotation for the cutting disc of the cut-off wheel is fed to a cut-off grinder.
- purpose Direction of rotation for the cutting disc of the cut-off wheel is fed to a cut-off grinder.
- the flap of the extraction nozzle is open and no suction hose is inserted into the extraction nozzle, it is possible to automatically specify a co-rotating direction of rotation of the separation disk, which is typically selected when no dust extraction takes place.
- the flap of the extraction nozzle is open and the suction hose is inserted into the extraction nozzle or connected to it, preferably an opposite direction of rotation is predetermined, since proper dust extraction can be ensured.
- the dust hood has a signal line, via which a sensor signal originating from the sensor unit can be tapped off, preferably for the purpose of indicating the direction of rotation for the cutting disk of the cut-off grinder.
- the signal line is guided through the flange of the dust hood.
- one or more interfaces may be provided, which correspond with one or more interfaces on the gear neck of the cutting grinder.
- the interface may have one or more electrical contact areas.
- the sensor unit has a flap contact, by means of which it can be detected whether the flap of the suction nozzle is open or closed.
- the sensor unit may have a nozzle contact, by means of which it can be detected whether the suction hose is connected to the suction nozzle.
- the sensor unit has a hood contact, by means of which it can be detected whether the dust hood is connected to the cut-off machine.
- the sensor signal of a hood contact can be evaluated by the cut-off, for example, such that rotation of the cutting disc is prevented when no dust hood is connected to the cutting grinder.
- the flap contact, the socket contact and the hood contact may be provided, for example in the form of a switch, a button, a magnetic contact or a light barrier.
- a sensor unit may comprise a combination of switches, buttons or the like.
- the flap contact is provided in the form of an on / off slide switch.
- the slide switch is actuated by the flap of the suction nozzle.
- the flap of the suction nozzle is shaped such that the slide switch is actuated when opening the flap.
- the flap contact and the hood contact can also be functionally integrated, for example in the form of an on / off / on toggle switch, which is preferably actuated by the flap of the suction nozzle.
- the closed flap pushes the toggle switch in a first on position
- the open flap pushes the toggle switch in a second on position
- / or the toggle switch assumes the off position (for example, center position) when the dust hood not arranged on a cut-off machine.
- a mechanical transmission path between the flap and the flange may be provided, for example in the form of a mechanical plunger, so that the toggle switch can be arranged in the region of the flap on the nozzle and at the same time is able to detect in the sense of the hood contact, if the dust hood connected to the cut-off machine.
- the flap contact and the nozzle contact are provided in the form of two buttons. It is preferably provided that the closed flap actuates the first button and the second button is actuated when the suction hose is inserted in the suction nozzle.
- the buttons may be arranged so that when the flap is opened and the suction hose is not connected to the suction nozzle, neither of the two buttons is pressed, which preferably causes the rotary control electronics prevents rotation of the cutting disc of the cutting grinder.
- the sensor unit has only the flap contact, preferably in the form of a button.
- the flap contact, the socket contact and / or the hood contact can be provided in many forms.
- the flap contact and the socket contact can be provided in the form of two light barriers, wherein a closed flap interrupts the first light barrier, an opened flap and / or a plugged-in suction hose preferably interrupts the second light barrier.
- rotation of the cutting disc is prevented by the direction of rotation control electronics when neither the first nor the second light barrier is interrupted.
- the flap contact is provided in the form of a light barrier. This can be arranged such that the open flap of the suction pipe interrupts the light barrier and the closed flap does not interrupt the light barrier.
- the flap contact and the socket contact in the form of magnetic contacts may be provided.
- a closed flap preferably closes a first magnetic switch.
- a plugged suction hose can close a second magnetic switch.
- the object is likewise achieved by a power cutter having a gear neck for connecting a dust hood of the type described above, wherein the power cutter has a direction of rotation control electronics, which is signal-connected with an attached dust hood via an interface with the sensor unit, such that depending on a sensor signal originating from the sensor unit the direction of rotation of the cutting wheel of the cutting grinder can be specified or specified.
- the direction of rotation control electronics is designed to prevent rotation of the cutting disc when no dust hood is connected to the cutting grinder.
- the power cutter is a hand tool.
- the abrasive grinder is battery powered, i. especially free from a power cord.
- the object is also achieved by a method for operating a cut-off grinder, wherein the cut-off machine has a dust hood equipped with a suction nozzle, and the method comprises the steps: Detecting, by means of a sensor unit comprised of the dust hood, whether a suction hose is connected in the suction nozzle and / or whether a flap of the suction nozzle is open,
- the method may be further developed by the features described above with respect to the devices described above.
- Fig. 1 shows a preferred embodiment of a dust hood according to the invention arranged on a cutting grinder according to the invention
- Fig. 2 shows another preferred embodiment of a cutting grinder according to the invention with dust hood
- FIG. 3 shows a further embodiment of a cutting grinder according to the invention with dust hood, wherein the dust hood is not connected to the cut-off machine;
- Fig. 1 shows a preferred embodiment of a dust hood 100 according to the invention, which is arranged on a cutting grinder 200 according to the invention.
- the dust hood 100 has a hood body 10 for at least partially covering both sides of a circular cutting disk 220.
- the dust hood 100 is also equipped with a suction nozzle 40 for connecting a suction hose 400. About the suction nozzle 40 and the suction hose 400, a substrate removal UG in the form of dust from a Thomasbow not shown here, be sucked out of the hood body 10.
- the dust hood 100 has a sensor unit 20, by means of which it can be detected whether a flap 45 of the suction nozzle 40 is open.
- the sensor unit 20 has a flap contact 21, by means of which it can be detected whether the flap 45 of the suction nozzle 11 is open or closed.
- the flap contact 21 is formed as an on / off slide switch, which is arranged on the suction nozzle 40, that when opening the flap 45 of the slide switch is actuated in the on position.
- the dust hood 100 has a signal line 80, via which sensor signal SL originating from the sensor unit 20 can be tapped, specifically for the purpose of indicating the direction of rotation of the cutting disk 220 of the cutting-off grinder 200.
- the cut-off machine 200 itself has a direction-of-rotation control electronics 230, which is signal-connected to the sensor unit 20 via an interface (see FIG. 3: interface 240) when the dust hood 100 is connected.
- interface 240 an interface
- the direction of rotation of the hub 220 can be specified.
- the flap 45 of the suction nozzle 40 is closed.
- the flap contact 21 of the sensor unit 20 is connected via the signal line 80 with the direction of rotation control electronics 230.
- the flap contact 21 is electrically opened in the form of a slide switch and the direction of rotation control electronics 230 is set up such that when commissioning the cutting machine 200, the cutting disc 220 is driven in the same direction of rotation GLD. This corresponds to a dry cutting operation without dust extraction.
- the flap contact 21 When the flap 45 is open (not shown here), the flap contact 21 would be electrically closed in the form of a slide switch, so that the direction of rotation control electronics 230 controls the cutter then that in the case of a start-up of the cutter 200, the cutter 220 is driven in the opposite direction of rotation GGD. This would correspond to dry cutting with dust extraction. It should be noted here that dust hood 100 of FIG. 1 is not adapted to detect whether the suction hose 400 is actually connected to the suction nozzle 40.
- the sensor unit 20 has a flap contact 21, by means of which it can be detected whether the flap 45 of the suction nozzle 11 is open or closed.
- the sensor unit 20 has a nozzle contact 23, by means of which it can be detected whether the suction hose 20 is connected to the suction nozzle 40.
- the flap contact 21 is provided in the form of a button to be actuated by the opening flap 45.
- the nozzle contact 23 is provided in the form of a provided within the suction nozzle 40 button, which closes here by way of example, when the suction hose 400 is inserted into the suction nozzle 40.
- the flap contact 21 is actuated in the form of a button, i. electrically closed.
- the direction of rotation command instructed by the direction of rotation control electronics 230 is in the opposite direction of rotation GLD of the cutting disc 220. If the flap 45 is open and the flap contact 21 in the form of the button is not actuated, i. electrically open, the direction of rotation depends on the switching state of the socket contact 23.
- the nozzle contact 23 is actuated in the form of the inside button, i. electrically closed.
- the switching state of the flap contact 21 and the socket contact 23 is transmitted in the form of a now purely electrical sensor signal SL to the direction of rotation control electronics 230, which now specifies an opposite direction of rotation GGD the blade 220.
- FIG. 3 essentially serves to explain how the sensor unit 20 is preferably to be coupled to the direction-of-rotation control electronics 230.
- the sensor unit 20 has a flap contact 21, by means of which it can be detected whether the flap 45 of the suction nozzle 1 1 is open or closed. Furthermore, the sensor unit has a hood contact 25, by means of which it can be detected whether the dust hood 100 is connected to the angle grinder 200.
- the flap contact 21 and the hood contact 25 may be provided for example in the form of buttons, but also in the form of magnetic switches.
- the dust hood 100 has a signal line 80, via which sensor signals SL originating from the flap contact 21 and the hood contact 25 can be tapped.
- the signal line 80 extends through the flange 90 of the dust hood towards an electrical interface 240 on the flange.
- the Getriebehals has a corresponding interface 240, from which the sensor signal SL reaches the direction of rotation control electronics 230 of the cutting grinder.
- FIG. 4 shows a method for operating a cut-off grinder, for example a cut-off grinder of FIGS. 1 to 3.
- a cut-off grinder for example a cut-off grinder of FIGS. 1 to 3.
- detection is carried out by means of a sensor unit comprised by the dust hood, if a suction hose is connected to the suction nozzle and / or if a flap of the suction is open.
- a control of the direction of rotation of the cutting disk of the cut-off wheel is effected as a function of the state detected by the sensor unit.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17167204.1A EP3391995A1 (de) | 2017-04-20 | 2017-04-20 | Staubhaube für einen trennschleifer |
PCT/EP2018/059652 WO2018192869A2 (de) | 2017-04-20 | 2018-04-16 | Staubhaube für einen trennschleifer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3612352A2 true EP3612352A2 (de) | 2020-02-26 |
EP3612352B1 EP3612352B1 (de) | 2022-06-08 |
Family
ID=58638680
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17167204.1A Withdrawn EP3391995A1 (de) | 2017-04-20 | 2017-04-20 | Staubhaube für einen trennschleifer |
EP18724784.6A Active EP3612352B1 (de) | 2017-04-20 | 2018-04-16 | Staubhaube für einen trennschleifer |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17167204.1A Withdrawn EP3391995A1 (de) | 2017-04-20 | 2017-04-20 | Staubhaube für einen trennschleifer |
Country Status (4)
Country | Link |
---|---|
US (1) | US20200122292A1 (de) |
EP (2) | EP3391995A1 (de) |
CN (1) | CN110536776B (de) |
WO (1) | WO2018192869A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3825062A1 (de) * | 2019-11-21 | 2021-05-26 | Hilti Aktiengesellschaft | Verfahren zum betreiben einer werkzeugmaschine und werkzeugmaschine |
US20230381920A1 (en) * | 2022-05-25 | 2023-11-30 | Raytheon Technologies Corporation | Machine control for grinding machine |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4105373A1 (de) * | 1991-02-21 | 1992-08-27 | Bernd Dipl Ing Neitzert | Von hand zu fuehrender trennschleifer |
US5951746A (en) * | 1995-11-30 | 1999-09-14 | Alfred Karcher Gmbh & Co. | Suction device for cleaning purposes |
DE10059712A1 (de) * | 2000-12-01 | 2002-06-20 | Bosch Gmbh Robert | Handwerkzeugmaschine |
CN2693166Y (zh) * | 2002-10-15 | 2005-04-20 | 松下电器产业株式会社 | 电动吸尘器 |
KR100638349B1 (ko) * | 2005-09-05 | 2006-10-25 | 동광기연 주식회사 | 워터젯유닛으로 재단할 차량 내장재 고정장치 |
US20090049699A1 (en) * | 2007-08-22 | 2009-02-26 | Hilti Aktiengesellschaft | Protective device for hand-held power tool |
JP5515250B2 (ja) * | 2008-07-31 | 2014-06-11 | 富士通株式会社 | 集塵機構および基板切断装置 |
US10870216B2 (en) * | 2008-09-30 | 2020-12-22 | Black & Decker Inc. | Table saws having integrated control systems |
US8640343B2 (en) * | 2009-08-27 | 2014-02-04 | Rayner Design Pty Ltd | Cutting apparatus |
US9221110B2 (en) * | 2009-10-02 | 2015-12-29 | JPL Global, LLC | Power saw apparatus with integrated dust collector |
JP5618731B2 (ja) * | 2010-09-27 | 2014-11-05 | 株式会社マキタ | 集塵機 |
DE102011087361B3 (de) * | 2011-11-29 | 2013-01-31 | Hilti Aktiengesellschaft | Absaugvorrichtung und Steuerungsverfahren |
JP2014133277A (ja) * | 2013-01-09 | 2014-07-24 | Hitachi Koki Co Ltd | 電動工具 |
CN203579754U (zh) * | 2013-09-24 | 2014-05-07 | 佛山市宝索机械制造有限公司 | 切纸机的磨刀机构 |
EP2937031A1 (de) * | 2014-04-23 | 2015-10-28 | HILTI Aktiengesellschaft | Modiwechsel |
JP6667236B2 (ja) * | 2015-09-10 | 2020-03-18 | 株式会社マキタ | グラインダ、カバー及びカバーセット |
JP6814150B2 (ja) * | 2015-09-25 | 2021-01-13 | 株式会社マキタ | グラインダ |
CN206085178U (zh) * | 2016-08-31 | 2017-04-12 | 诸暨汇隆服装有限公司 | 一种带距离探测装置的自动裁床 |
-
2017
- 2017-04-20 EP EP17167204.1A patent/EP3391995A1/de not_active Withdrawn
-
2018
- 2018-04-16 US US16/605,633 patent/US20200122292A1/en active Pending
- 2018-04-16 WO PCT/EP2018/059652 patent/WO2018192869A2/de unknown
- 2018-04-16 CN CN201880024439.4A patent/CN110536776B/zh active Active
- 2018-04-16 EP EP18724784.6A patent/EP3612352B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
WO2018192869A2 (de) | 2018-10-25 |
EP3391995A1 (de) | 2018-10-24 |
WO2018192869A3 (de) | 2018-12-13 |
EP3612352B1 (de) | 2022-06-08 |
CN110536776A (zh) | 2019-12-03 |
CN110536776B (zh) | 2021-12-24 |
US20200122292A1 (en) | 2020-04-23 |
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