EP3391993A1 - Meuleuse - Google Patents

Meuleuse Download PDF

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Publication number
EP3391993A1
EP3391993A1 EP17167197.7A EP17167197A EP3391993A1 EP 3391993 A1 EP3391993 A1 EP 3391993A1 EP 17167197 A EP17167197 A EP 17167197A EP 3391993 A1 EP3391993 A1 EP 3391993A1
Authority
EP
European Patent Office
Prior art keywords
grinder
cut
hood
cutting
sensor unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17167197.7A
Other languages
German (de)
English (en)
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
Priority to EP17167197.7A priority Critical patent/EP3391993A1/fr
Priority to CN201880025135.XA priority patent/CN110505940B/zh
Priority to EP18715745.8A priority patent/EP3612349B1/fr
Priority to PCT/EP2018/059309 priority patent/WO2018192823A1/fr
Priority to US16/605,671 priority patent/US11685011B2/en
Publication of EP3391993A1 publication Critical patent/EP3391993A1/fr
Withdrawn legal-status Critical Current

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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 having a gear neck for connecting a dust cap equipped with a flange.
  • Dust hoods are typically equipped with a dust cover to prevent the spread of dust during the cutting process, by means of which a background removal can be extracted from the hood body. Furthermore dust hoods are known, which have a flushing port, through which rinse water can be guided in the dust hood for the purpose of dust removal. Both types of dust hoods protect the health of a user of the cutting machine.
  • the cut-off machine has a sensor unit, by means of which it is possible to detect which type of dust hood is connected to the cut-off machine, wherein the cut-off machine further has a direction of rotation control electronics, which is signal-connected to the sensor unit, such that the direction of rotation of a separating disk of the cutting grinder is specified as a function of the dust hood type detected by the sensor unit.
  • the invention includes the recognition that prior art cutoff grinders can be operated in various modes of use, which also depend, in particular, on the type of cutting and dust removal.
  • a cutting disc of the cutting grinder is driven in the same direction of rotation.
  • wet cutting in which rinse water is introduced into the dust hood via a flushing connection.
  • a direction of rotation of a cutting disc can now be preselected automatically, namely as a function of the dust hood type detected by the sensor unit.
  • operating errors in the direction of rotation can be excluded, which significantly increases the safety and health of a user of the cutting machine.
  • the rotary control electronics is further configured to prevent rotation of the cutting disc when no dust hood is connected to the cutting grinder.
  • the sensor unit is arranged on a surface of the cut-off wheel, preferably near the gear neck.
  • the sensor unit can be arranged on a gripping end face of the cut-off grinder.
  • 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 may 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 may 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. In the following, some preferred embodiments will be described in more detail.
  • the hood type contact may be provided, for example, in the form of an on / off / on slide switch disposed on a surface of the cutting grinder.
  • the slide switch may for example be arranged and arranged such that an inclined plane formed on the dust hood actuates the slide switch.
  • an inclined plane of a hood can represent a mechanical coding which is read out by the hood type contact, in the present example thus the slide switch. Accordingly, different oblique 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, that it is pushed to the right when connecting a dust hood with suction, which has a first mechanical coding. It may also be provided that the slide switch is pushed to the left when attaching a dust hood with flushing connection, which has a second, different from the first coding coding. Alternatively or additionally, it may be provided that, if no dust hood is arranged on the cut-off wheel, the slide switch remains in the middle position and, caused by the direction of rotation control electronics, then a rotation of the cutting disc is completely prevented.
  • the invention is also solved by a system comprising a previously described cut-off grinder and two dust hoods of different types, the type each being defined by a preferably mechanical coding which can be read out by the sensor unit of the cut-off grinder.
  • the invention is likewise achieved by a dust hood which has on its surface a preferably mechanical coding which can be read out by a sensor unit of a cut-off grinder.
  • abrasive cutter is described.
  • a synchronous direction of rotation of the cutting disc is predetermined and / or if the sensor unit detects a dust hood with suction, the blade is given an opposite direction of rotation.
  • the hood contact and the hood type contact may be functionally integrated, for example, by the provision of an on / off / on toggle switch, which is preferably operated by a survey on a dust hood.
  • a dust hood with flushing connection actuates the toggle switch in a first on position, whereby an electrical signal is fed to the direction of rotation control electronics, which leads to a synchronous direction of rotation of the cutting disk when the cut-off grinder is activated.
  • toggle switch In the second on position of the toggle switch can be brought by attaching a dust hood with exhaust. Accordingly, an opposite direction of rotation of the blade is effected.
  • toggle switch in off position (middle position)
  • a rotation of the cutting disc is preferably completely prevented because no dust hood is connected to the cut-off.
  • an on / off toggle switch may also be provided. This is preferably actuated by an inclined plane on the hood.
  • the toggle switch forms only a hood type contact, can be specified via the opposite direction of rotation or the same direction of rotation.
  • the sensor unit may comprise two buttons, which together realize the hood contact and the hood type contact.
  • the buttons are preferably arranged such that a first mechanical coding on the dust hood with rinsing connection actuates the first button and does not actuate the second button.
  • a dust hood with extraction nozzle has a second coding, which differs from the first coding, which actuates the second key and leaves the first key unoperated. If neither a dust hood with a suction nozzle nor a suction hood with flushing connection is connected to the cut-off machine, then both buttons remain preferably unactuated. In this case, a rotation of the cutting disc is prevented by the direction of rotation control electronics as soon as the cut-off grinder is activated.
  • the sensor unit of the cut-off grinder has only one hood-type contact, which is preferably provided in the form of a push-button.
  • the direction of rotation control electronics is set to specify a direction of rotation in the same direction 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 rinsing 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. In this respect realize the first and the second photoelectric switch a hood type contact. If neither of the two light barriers is interrupted, this means that no or a manufacturer-external dust hood is connected to the cut-off machine. The first and second light barrier thus also realize a hood contact, which causes that if neither of the two light barriers is interrupted, a rotation of the cutting disc is prevented.
  • exactly one light barrier can be provided, which acts only as a hood type contact. It can be provided that a dust hood with rinsing connection interrupts this light barrier, whereas a dust hood with suction connection does not interrupt the light barrier.
  • the hood contact and / or the hood type contact can be realized by one or more magnetic switches, which are provided by magnets on the hood.
  • the magnetic switches define the sensor unit and the magnet or magnets on the hood mechanical coding.
  • a dust hood with a 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 which is different from the first magnetic coding and which is arranged such that the second magnetic switch is activated on the cut-off grinder. If no dust hood is provided on the cut-off machine, the direction-of-rotation control electronics suppress the rotation of the cut-off wheel.
  • a power cutter is provided with a gear neck for connecting a dust hood equipped with a flange.
  • 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, wherein the cut-off machine further has a direction of rotation control electronics, which is signal-connected to the sensor unit, such that rotation of the cut-off wheel is prevented, if no dust hood connected to the cut-off machine.
  • the step of detecting includes reading out a mechanical coding of the dust hood connected to the cut-off machine.
  • the power cutter is a hand tool.
  • the abrasive grinder is battery powered, i. especially without mains cable.
  • FIG Fig. 1 A preferred embodiment of a cutter 200 according to the invention is shown in FIG Fig. 1 shown.
  • a dust hood 100 Connected to the cut-off grinder 200 is a dust hood 100 for at least partially covering both sides of a circular cutting disk 220.
  • the dust hood 100 has a suction connection 40, via which a background removal from the hood body 10 can be sucked off.
  • the suction nozzle 40 has a flap 45.
  • a suction hose 40 to be introduced into the suction hose is in Fig. 1 not shown.
  • the cut-off machine 200 has a sensor unit 20 which is arranged on a surface OF of the cut-off grinder 200.
  • the cut-off machine 200 also has a direction-of-rotation control electronics 230, which is signal-connected to the sensor unit 20 via the signal line 80.
  • the direction of rotation control electronics 230 is set up to predetermine the direction of rotation of the cutting disk 220 as a function of the sensor signal SL coming from the sensor unit 20.
  • the sensor unit 20 has a hood-type contact 27 in the form of a pushbutton, by means of which a mechanical coding 110 of the dust hood 100 can be read out.
  • the mechanical coding 110 is realized 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 cause an opposite direction of rotation GGD of the cutting disk when the button is pressed (hood type contact 27). This corresponds to a dry cutting operation with dust extraction.
  • Fig. 2 shows a system 600 with a cut-off machine 200 and two dust hoods 100, 100 'of different types.
  • Top in Fig. 2 can be seen a dust cover 100 with suction 40.
  • a suction hose 400 can be inserted, via which a background removal UG can be sucked out of the dust cover 100.
  • On the hood body 10 of the dust hood 100 a first mechanical coding 110 is formed in the form of a simple elevation.
  • FIG. 2 Bottom right in Fig. 2 another type of dust hood is shown, namely a dust hood 100 'with flushing connection 50.
  • a flushing hose 500 can be connected to the flushing connection 50.
  • the dust hood 100 ' has a second mechanical coding 110' in the form of a double elevation.
  • Fig. 2 On the left side of the Fig. 2 illustrated is the cut-off machine 200 with a gear neck 210 to which both the dust cover 100 with suction 40 and the dust hood 110 with flushing port 50, respectively 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 power cutter 200 has a direction of rotation control electronics 230 which is connected via a signal line 80 to the sensor unit 20.
  • the direction of rotation control electronics 230 is set up, the direction of rotation of the cutting disc 220 (see. Fig. 1 ) as a function of the dust hood type detected by the sensor unit 20.
  • the direction of rotation control electronics 230 is further formed, a rotation of the blade (see. Fig. 1 ), if - as in Fig. 2 shown - none of the dust hoods 100, 100 'are connected to the grinder 200.
  • the sensor unit 20 which has said on / off / on-toggle switch, is displaced with connection of the dust hood 110 with flushing connection 50 in a first on position and pressed at connection of the dust hood 100 with suction 40 in the second on position. If neither of the dust hoods 100, 100 'is connected to the cut-off machine 200, then the toggle switch not shown here is in the middle position, which prevents the cutting disk 220 from rotating when the cut-off wheel 200 is activated. This is effected by the appropriately established direction of rotation control electronics 230th
  • FIG. 3 shows a further preferred embodiment of a cutting grinder 200 according to the invention.
  • the grinder 200 has at a Griffstirnseite GF a sensor unit 20, which has only a hood-type contact 27 in the form of a magnetic contact in the present embodiment shown.
  • the dust hood 100 with suction nozzle 40 which is shown above the cutting-off grinder 200, has as coding 110 a magnet embedded in the hood body.
  • the hood type contact 27 is operated in the form of a magnetic switch by the code 110 in the form of a magnet, i. electrically closed.
  • the electrical closing of the magnetic switch is evaluated by the direction of rotation control electronics 230 in the sense of a sensor signal.
  • the direction of rotation control electronics 230 is set up, with attached dust hood 100, ie with closed magnetic contact, the cutting disc 220 (see. Fig. 1 ) to drive GGD in opposite direction.
  • FIG. 4 shows a further preferred embodiment of a cutting grinder 200 according to the invention.
  • This has on its surface OF a sensor unit 20, which are provided in the present embodiment 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 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 with flushing connection, which is not shown here, would activate the upper of the two buttons.
  • the two buttons act together as a hood type contact 27, based on the switching state, the direction of rotation of the blade is specified.
  • buttons not shown here in more detail act synergistically also as hood contact 25, by means of which it can be detected whether a dust hood is connected to the cut-off machine.
  • FIG. 3 shows a method according to the invention for operating a cut-off grinder, for example the cut-off grinder 200 described with reference to the previous figures.
  • detection is carried out by means of a sensor unit comprised by the cut-off machine, which type of dust hood is connected to the cut-off grinder.
  • a control of a direction of rotation of the cutting disk of the cutting-off grinder takes place as a function of the state detected by the sensor unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
EP17167197.7A 2017-04-20 2017-04-20 Meuleuse Withdrawn EP3391993A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP17167197.7A EP3391993A1 (fr) 2017-04-20 2017-04-20 Meuleuse
CN201880025135.XA CN110505940B (zh) 2017-04-20 2018-04-11 切割式打磨机
EP18715745.8A EP3612349B1 (fr) 2017-04-20 2018-04-11 Meuleuse
PCT/EP2018/059309 WO2018192823A1 (fr) 2017-04-20 2018-04-11 Meuleuse angulaire
US16/605,671 US11685011B2 (en) 2017-04-20 2018-04-11 Angle grinder

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
EP3391993A1 true EP3391993A1 (fr) 2018-10-24

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 After (1)

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

Country Status (4)

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

Cited By (2)

* 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
EP4289553A1 (fr) * 2022-06-07 2023-12-13 Hilti Aktiengesellschaft Appareil outil électrique doté d'un outil rotatif

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3834993A1 (fr) * 2019-12-11 2021-06-16 Hilti Aktiengesellschaft Appareil outil électrique doté d'un moteur et d'un outil rotatif

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002043920A1 (fr) * 2000-12-01 2002-06-06 Robert Bosch Gmbh Outil a main comportant un capteur destine a l'emission de signaux lors du remplacement de l'outil a main
JP2014133277A (ja) * 2013-01-09 2014-07-24 Hitachi Koki Co Ltd 電動工具
EP3141342A2 (fr) * 2015-09-10 2017-03-15 Makita Corporation Meuleuse avec couvercle et couvercle
WO2017051893A1 (fr) * 2015-09-25 2017-03-30 株式会社マキタ Broyeur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010087235A1 (fr) * 2009-01-30 2010-08-05 Hitachi Koki Co., Ltd. Outil électrique
DE102010043182A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Tragbare Werkzeugmaschine
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
WO2017051892A1 (fr) * 2015-09-25 2017-03-30 株式会社マキタ Broyeur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002043920A1 (fr) * 2000-12-01 2002-06-06 Robert Bosch Gmbh Outil a main comportant un capteur destine a l'emission de signaux lors du remplacement de l'outil a main
JP2014133277A (ja) * 2013-01-09 2014-07-24 Hitachi Koki Co Ltd 電動工具
EP3141342A2 (fr) * 2015-09-10 2017-03-15 Makita Corporation Meuleuse avec couvercle et couvercle
WO2017051893A1 (fr) * 2015-09-25 2017-03-30 株式会社マキタ Broyeur

Cited By (4)

* 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
WO2021099221A1 (fr) * 2019-11-21 2021-05-27 Hilti Aktiengesellschaft Dispositif d'actionnement de machine-outil, et machine-outil
CN114555289A (zh) * 2019-11-21 2022-05-27 喜利得股份公司 操作机床的方法和机床
EP4289553A1 (fr) * 2022-06-07 2023-12-13 Hilti Aktiengesellschaft Appareil outil électrique doté d'un outil rotatif

Also Published As

Publication number Publication date
CN110505940B (zh) 2021-07-02
US20200122288A1 (en) 2020-04-23
CN110505940A (zh) 2019-11-26
EP3612349B1 (fr) 2021-01-06
EP3612349A1 (fr) 2020-02-26
US11685011B2 (en) 2023-06-27
WO2018192823A1 (fr) 2018-10-25

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