EP3612349B1 - Meuleuse - Google Patents

Meuleuse Download PDF

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Publication number
EP3612349B1
EP3612349B1 EP18715745.8A EP18715745A EP3612349B1 EP 3612349 B1 EP3612349 B1 EP 3612349B1 EP 18715745 A EP18715745 A EP 18715745A EP 3612349 B1 EP3612349 B1 EP 3612349B1
Authority
EP
European Patent Office
Prior art keywords
cut
grinder
hood
sensor unit
dust hood
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.)
Active
Application number
EP18715745.8A
Other languages
German (de)
English (en)
Other versions
EP3612349A1 (fr
Inventor
Kevin KUHLMANN
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 EP3612349A1 publication Critical patent/EP3612349A1/fr
Application granted granted Critical
Publication of EP3612349B1 publication Critical patent/EP3612349B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece
    • 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
    • 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

Definitions

  • the present invention relates to a power cutter with a gear neck for connecting a dust hood equipped with a flange.
  • Such cut-off machines are basically known from the prior art (see e.g. WO 2017/051893 A1 ).
  • dust hoods are typically equipped with a dust hood through which a substrate material can be extracted from the hood body.
  • dust hoods are known which have a rinsing connection via which rinsing water can be fed into the dust hood for the purpose of removing dust. Both types of dust hoods protect the health of a user of the power cutter.
  • the cut-off machine has a sensor unit, by means of which it can be detected which type of dust hood is connected to the cut-off machine, the cut-off machine also having rotational direction control electronics that are signal-connected to the sensor unit, such that the direction of rotation of a cutting wheel of the cut-off machine depending on the type of dust cover detected by the sensor unit.
  • the invention includes the knowledge that cutoff grinders of the prior art can be operated in different modes of use, these also depending in particular on the type of cutting and the dust removal.
  • a cut-off wheel of the cut-off machine is driven in the same direction of rotation.
  • wet cutting in which rinsing water is brought into the dust hood via a rinsing connection.
  • an opposite direction of rotation of the cut-off wheel of the cut-off machine is preferred.
  • a direction of rotation of a cutting disc can now be automatically preselected, namely depending on the type of dust hood detected by the sensor unit.
  • operating errors in preselecting the direction of rotation can be excluded, which significantly increases the safety and health of a user of the cut-off machine.
  • the sensor unit can be used to detect whether the dust hood is connected to the power cutter.
  • the rotation control electronics are preferably further designed to prevent rotation of the cutting wheel when no dust hood is connected to the cutting machine.
  • the sensor unit is arranged on a surface of the cut-off machine, preferably close to the gear neck.
  • the sensor unit can be arranged on a handle face of the cut-off machine. Basically, it should be noted that depending on the specific space available on the cut-off machine and depending on the technical feasibility, the position of the sensor unit can be adapted accordingly to the cut-off machine.
  • 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 unit can likewise preferably have a hood-type contact, by means of which a preferably mechanical coding of the dust hood connected to the cut-off machine can be read out.
  • the hood contact and / or the hood-type contact can be provided in the form of a switch, a button, a magnetic contact or a light barrier. A combination of these components is also conceivable. Some preferred configurations are to be described in more detail below.
  • the hood-type contact can be provided, for example, in the form of an on / off / on slide switch which is arranged on a surface of the power cutter.
  • the slide switch can for example be set up and arranged in such a way that an inclined plane formed on the dust hood actuates the slide switch.
  • an inclined plane of a hood can represent a mechanical coding that is read out by the hood-type contact, in the present example the slide switch. Accordingly, different inclined planes are to be provided on different hood types.
  • mechanical codings in the form of a projection, recess or the like can be provided on the dust hood.
  • the slide switch can be arranged, for example, so that it is pushed to the right when a dust hood with a suction nozzle, which has a first mechanical coding, is connected. It can also be provided that the slide switch is pushed to the left when a dust hood with flushing connection, which has a second coding different from the first coding, is attached. Alternatively or additionally, it can be provided that, if no dust hood is arranged on the cut-off machine, the slide switch remains in the middle position and, caused by the electronic direction of rotation control, rotation of the cut-off wheel is completely prevented.
  • the invention is also achieved by a system with a cut-off grinder as described above and two dust hoods of different types, the type being defined in each case by a preferably mechanical coding that can be read out by the cut-off machine's sensor unit.
  • the invention is also achieved by a dust hood which has a preferably mechanical coding on its surface, which can be read out by a sensor unit of a cut-off machine.
  • the hood contact and the hood-type contact can be functionally integrated, for example by providing an on / off / on toggle switch, which is preferably to be operated by an elevation on a dust hood.
  • a dust hood with flushing connection actuates the toggle switch to a first on position, whereby an electrical signal is fed to the electronic direction of rotation control electronics, which leads to a co-rotating direction of rotation of the cutting wheel when the cut-off machine is activated.
  • the toggle switch can be brought into the second on position by attaching a dust hood with a suction nozzle. Accordingly, the cutting wheel rotates in the opposite direction.
  • the toggle switch is in the off position (middle position)
  • rotation of the cutting disc is preferably completely prevented, since no dust hood is connected to the cutting grinder.
  • an on / on toggle switch can also be provided. This is preferably actuated by an inclined plane on the hood.
  • the toggle switch forms exclusively a hood-type contact, via which the opposite direction of rotation or the same direction of rotation can be specified.
  • the sensor unit can have two buttons, which together realize the hood contact and the hood-type contact.
  • the buttons are preferably arranged in such a way that a first mechanical coding on the dust hood with flushing connection actuates the first button and does not actuate the second button.
  • a dust hood with suction nozzle has a second coding different from the first coding, which actuates the second button and leaves the first button unactuated. If neither a dust hood with a suction nozzle nor a suction hood with a rinsing connection is connected to the power cutter, both buttons preferably remain unactuated. In this case, rotation of the cutting wheel is prevented by the direction of rotation control electronics as soon as the cut-off machine is activated.
  • the sensor unit of the cut-off machine has only one hood-type contact, which is preferably provided in the form of a button.
  • the direction of rotation control electronics are set up to specify a co-rotating direction of rotation when the button is pressed and to specify an opposite direction of rotation when the button is not pressed.
  • the hood contact and / or the hood-type contact can be provided by one or more light barriers. It is preferably provided that a mechanical coding of the dust hood with flushing connection causes an interruption of the first light barrier and a mechanical coding on the dust hood with suction nozzle causes an interruption of the second light barrier.
  • realize the first and second photoelectric switches have a hood-type contact. If neither of the two light barriers is interrupted, this means that none or a non-manufacturer dust hood is connected to the power cutter.
  • the first and second light barriers also realize a cover contact which has the effect that if neither of the two light barriers is interrupted, rotation of the cutting disc is prevented.
  • precisely one light barrier can be provided which only acts as a hood-type contact. It can be provided that a dust hood with a flushing connection interrupts this light barrier, whereas a dust hood with a suction connection does not interrupt the light barrier.
  • the hood contact and / or the hood-type contact can be implemented by one or more magnetic switches that are provided by magnets on the hood.
  • the magnetic switches define the sensor unit and the magnet or magnets on the hood a mechanical coding.
  • a dust hood with suction nozzle has a first magnetic coding which actuates a first magnetic switch, for example a reed contact.
  • a dust hood with flushing connection has a second coding different from the first magnetic coding, which is arranged in such a way that the second magnetic switch on the power cutter is activated. If no dust hood is provided on the cut-off machine, the electronic direction of rotation control prevents the cutting wheel from rotating.
  • a power cutter with a gear neck for connecting a dust hood equipped with a flange is provided.
  • the cut-off machine has a sensor unit, by means of which it can be detected whether a dust hood is connected to the cut-off machine, the power cut-off machine also having a rotational direction control electronics which is signal-connected to the sensor unit, such that a rotation of the cutting wheel is prevented if no dust hood is on connected to the power cutter.
  • the step of detecting preferably includes reading out a mechanical coding of the dust hood connected to the power cutter.
  • the cutoff grinder is preferably a handheld power tool.
  • the power cutter is particularly preferably battery-operated, i.e. in particular without a power cord.
  • FIG Fig. 1 A preferred embodiment of a power cutter 200 according to the invention is shown in FIG Fig. 1 shown.
  • Attached to the cut-off machine 200 is a dust hood 100 for covering at least sections of a circular cutting disk 220 on both sides.
  • the dust hood 100 has a suction connection 40 via which a substrate material can be extracted from the hood body 10.
  • the suction nozzle 40 has a flap 45.
  • a suction hose to be inserted into the suction nozzle 40 is shown in FIG Fig. 1 not shown.
  • the cutoff grinder 200 has a sensor unit 20 which is arranged on a surface OF of the cutoff grinder 200.
  • the cut-off machine 200 also has rotational direction control electronics 230, which are signal-connected to the sensor unit 20 via the signal line 80.
  • the direction of rotation control electronics 230 are set up to predetermine the direction of rotation of the cutting disk 220 as a function of the sensor signal SL originating from the sensor unit 20.
  • the sensor unit 20 has a hood-type contact 27 in the form of a button, by means of which a mechanical coding 110 of the dust hood 100 can be read out.
  • the mechanical coding 110 is implemented by an inclined plane which is formed on the hood body 10 of the dust hood 100.
  • the direction of rotation control electronics 230 is set up to bring about an opposite direction of rotation GGD of the cutting wheel when the button (hood type contact 27) is actuated. This corresponds to a dry cutting operation with dust extraction.
  • the direction of rotation control electronics 230 would specify a parallel direction of rotation GLD, which would mean a wet cutting operation without dust extraction.
  • FIG. 2 shows a system 600 with a power cutter 200 and two dust hoods 100, 100 'of different types.
  • a dust hood 100 with a suction nozzle 40 can be seen.
  • a suction hose 400 can be inserted into the suction nozzle 40, via which a subsurface material UG can be sucked out of the dust hood 100.
  • a first mechanical coding 110 in the form of a simple elevation is formed on the hood body 10 of the dust hood 100.
  • FIG. 2 Another type of dust hood is shown, namely a dust hood 100 ′ with a rinsing connection 50.
  • a rinsing hose 500 can be connected to the rinsing connection 50.
  • the dust hood 100 ' has a second mechanical coding 110' in the form of a double elevation.
  • the cut-off grinder 200 is shown with a gear neck 210, to which both the dust hood 100 with suction nozzle 40 and the dust hood 110 with flushing connection 50, in each case via its flange 90, can be connected.
  • the cut-off machine has a sensor unit 20 which has both a hood contact 25 and a hood-type contact 27.
  • the hood contact 25 and the hood contact 27 should be functionally integrated in the form of an on / off / on toggle switch.
  • the cut-off machine 200 has an electronic direction control unit 230 which is connected to the sensor unit 20 via a signal line 80.
  • the direction of rotation control electronics 230 is set up, the direction of rotation of the cutting disc 220 (cf. Fig. 1 ) as a function of the type of dust hood detected by the sensor unit 20.
  • the direction of rotation control electronics 230 is further developed, a rotation of the cutting disc (cf. Fig. 1 ) if - as in Fig. 2 shown - none of the dust hoods 100, 100 'are connected to the power cutter 200.
  • the sensor unit 20 which has the said on / off / on toggle switch, is moved into a first on position when the dust hood 110 with flushing connection 50 is connected and is pushed into the second on position when the dust hood 100 with suction nozzle 40 is connected. If neither of the two dust hoods 100, 100 ′ is connected to the cut-off grinder 200, the toggle switch, not shown in detail here, is in the middle position, which prevents rotation of the cut-off wheel 220 when the cut-off grinder 200 is activated. This is brought about by the correspondingly configured rotational direction control electronics 230.
  • Fig. 3 shows a further preferred embodiment of a cut-off grinder 200 according to the invention.
  • the cut-off grinder 200 has a sensor unit 20 on a handle face GF, which in the embodiment shown here has only one hood-type contact 27 in the form of a magnetic contact.
  • the dust hood 100 with suction nozzle 40 shown above the cut-off grinder 200 has a magnet embedded in the hood body as coding 110.
  • the hood type contact 27 in the form of a magnetic switch is actuated by the coding 110 in the form of a magnet, i.e. electrically closed.
  • the electrical closing of the magnetic switch is evaluated by the rotational direction control electronics 230 in terms of a sensor signal.
  • the rotational direction control electronics 230 are set up, with the dust hood 100 attached, ie with the magnetic contact closed, the cutting disc 220 (cf. Fig. 1 ) to be driven in the opposite direction of rotation GGD.
  • FIG. 3 shows another preferred exemplary embodiment of a cut-off grinder 200 according to the invention.
  • This has a sensor unit 20 on its surface OF, which in the exemplary embodiment shown here is provided by a hood contact 25 and a hood-type contact 27, each in the form of a discrete button.
  • the hood contact 25 and the hood-type contact 27 are functionally integrated, which will be explained in more detail below.
  • the mechanical coding 110 on the dust hood 100 with suction nozzle 40 is set up to actuate the lower of the two buttons.
  • the connection of a dust hood (not shown here) with a rinsing connection would activate the upper of the two buttons.
  • the two buttons act together as a hood-type contact 27, on the basis of whose switching state the direction of rotation of the cutting disc is specified.
  • buttons which are not shown in more detail here, also act synergistically as a cover contact 25, by means of which it can be detected whether a dust cover is connected to the cut-off machine.
  • FIG. 4 shows a method according to the invention for operating a power cutter, for example the power cutter 200 described with reference to the previous figures.
  • a sensor unit comprised by the power cutter detects which type of dust hood is connected to the power cutter.
  • a direction of rotation of the cut-off wheel of the cut-off machine is controlled as a function of the state detected by the sensor unit.

Claims (10)

  1. Tronçonneuse (200) comprenant un col de transmission (210) destiné au raccordement d'un collecteur de poussière (100, 100') équipée d'une collerette (90),
    caractérisée en ce que la tronçonneuse (200) comporte une unité de détection (20) permettant de détecter le type de collecteur de poussière (100, 100') qui est raccordé à la tronçonneuse (200), la tronçonneuse (200) comportant en outre une électronique de commande de sens de rotation (230) qui est connectée par une liaison de signal à l'unité de détection (20) de telle sorte que le sens de rotation (GGD, GLD) d'une meule de tronçonnage (220) de la tronçonneuse (200) est spécifié en fonction du type de collecteur de poussière détecté par l'unité de détection (20).
  2. Tronçonneuse (200) selon la revendication 1,
    caractérisée en ce que l'unité de détection (20) peut détecter si le collecteur de poussière (100, 100') est raccordé à la tronçonneuse (200), l'électronique de commande de sens de rotation (230) étant en outre conçue pour empêcher la rotation de la meule de tronçonnage (220) lorsqu'aucun collecteur de poussière (100, 100') n'est raccordé à la tronçonneuse (200).
  3. Tronçonneuse (200) selon la revendication 1 ou 2,
    caractérisée en ce que l'unité de détection (20) est disposée sur une surface (OF) de la tronçonneuse (200), de préférence à proximité du col de transmission (210).
  4. Tronçonneuse (200) selon l'une des revendications précédentes,
    caractérisée en ce que l'unité de détection (20) est disposée sur un côté frontal de poignée (GF) de la tronçonneuse (200).
  5. Tronçonneuse (200) selon l'une des revendications précédentes,
    caractérisée en ce que l'unité de détection (20) comporte un contact de collecteur (25) permettant de détecter si le collecteur de poussière (100, 100') est raccordé à la tronçonneuse (200).
  6. Tronçonneuse (200) selon l'une des revendications précédentes,
    caractérisée en ce que l'unité de détection (20) comporte un contact de type de collecteur (27) permettant de lire un codage (110, 110'), de préférence mécanique, du collecteur de poussière (100, 100') raccordé à la tronçonneuse (200).
  7. Tronçonneuse (200) selon la revendication 4 ou 5,
    caractérisée en ce que le contact de collecteur (25) et/ou le contact de type de collecteur (27) est prévu sous la forme d'un commutateur, d'un bouton, d'un contact magnétique ou d'une barrière lumineuse.
  8. Système (600) comprenant une tronçonneuse (200) selon l'une des revendications précédentes, et deux collecteurs de poussière (100, 100') de types différents, le type étant déterminé à chaque fois par un codage (110, 110'), de préférence mécanique, qui peut être lu par l'unité de détection (20) de la tronçonneuse (200).
  9. Procédé de fonctionnement d'une tronçonneuse comprenant un col de transmission destiné au raccordement d'un collecteur de poussière équipé d'une collerette, le procédé comprenant les étapes suivantes :
    - (S1) détecter, au moyen d'une unité de détection comprise dans la tronçonneuse, le type de collecteur qui est raccordé à la tronçonneuse,
    - (S2) commander un sens de rotation de la meule de tronçonnage de la tronçonneuse en fonction de l'état détecté par l'unité de détection.
  10. Procédé selon la revendication 9,
    caractérisé en ce que l'étape de détection (S1) comprend la lecture d'un codage mécanique du collecteur de poussière raccordé à la tronçonneuse.
EP18715745.8A 2017-04-20 2018-04-11 Meuleuse Active EP3612349B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17167197.7A EP3391993A1 (fr) 2017-04-20 2017-04-20 Meuleuse
PCT/EP2018/059309 WO2018192823A1 (fr) 2017-04-20 2018-04-11 Meuleuse angulaire

Publications (2)

Publication Number Publication Date
EP3612349A1 EP3612349A1 (fr) 2020-02-26
EP3612349B1 true EP3612349B1 (fr) 2021-01-06

Family

ID=58638679

Family Applications (2)

Application Number Title Priority Date Filing Date
EP17167197.7A Withdrawn EP3391993A1 (fr) 2017-04-20 2017-04-20 Meuleuse
EP18715745.8A Active EP3612349B1 (fr) 2017-04-20 2018-04-11 Meuleuse

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP17167197.7A Withdrawn EP3391993A1 (fr) 2017-04-20 2017-04-20 Meuleuse

Country Status (4)

Country Link
US (1) US11685011B2 (fr)
EP (2) EP3391993A1 (fr)
CN (1) CN110505940B (fr)
WO (1) WO2018192823A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3825062A1 (fr) * 2019-11-21 2021-05-26 Hilti Aktiengesellschaft Procédé de fonctionnement d'une machine-outil et machine-outil
EP3834993A1 (fr) * 2019-12-11 2021-06-16 Hilti Aktiengesellschaft Appareil outil électrique doté d'un moteur et d'un outil rotatif
EP4289553A1 (fr) * 2022-06-07 2023-12-13 Hilti Aktiengesellschaft Appareil outil électrique doté d'un outil rotatif

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10059712A1 (de) * 2000-12-01 2002-06-20 Bosch Gmbh Robert Handwerkzeugmaschine
CN102149515B (zh) 2009-01-30 2014-08-06 日立工机株式会社 电动工具
DE102010043182A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Tragbare Werkzeugmaschine
JP2014133277A (ja) * 2013-01-09 2014-07-24 Hitachi Koki Co Ltd 電動工具
JP6247202B2 (ja) 2014-12-18 2017-12-13 ファナック株式会社 保護カバーの検出装置を備えた工作機械
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
WO2017051892A1 (fr) * 2015-09-25 2017-03-30 株式会社マキタ Broyeur
WO2017051893A1 (fr) * 2015-09-25 2017-03-30 株式会社マキタ Broyeur

Also Published As

Publication number Publication date
US20200122288A1 (en) 2020-04-23
US11685011B2 (en) 2023-06-27
WO2018192823A1 (fr) 2018-10-25
EP3612349A1 (fr) 2020-02-26
CN110505940B (zh) 2021-07-02
CN110505940A (zh) 2019-11-26
EP3391993A1 (fr) 2018-10-24

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