EP3551382A1 - Collecteur de poussière d'une meuleuse - Google Patents

Collecteur de poussière d'une meuleuse

Info

Publication number
EP3551382A1
EP3551382A1 EP17808813.4A EP17808813A EP3551382A1 EP 3551382 A1 EP3551382 A1 EP 3551382A1 EP 17808813 A EP17808813 A EP 17808813A EP 3551382 A1 EP3551382 A1 EP 3551382A1
Authority
EP
European Patent Office
Prior art keywords
hood
sector
web
dust hood
grinding wheel
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
Application number
EP17808813.4A
Other languages
German (de)
English (en)
Other versions
EP3551382B1 (fr
Inventor
Sarah HARDER
Oliver Ohlendorf
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 EP3551382A1 publication Critical patent/EP3551382A1/fr
Application granted granted Critical
Publication of EP3551382B1 publication Critical patent/EP3551382B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B24B55/06—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
    • 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
    • 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

Definitions

  • the present invention relates to a dust hood for a equipped with a Getriebehals for mounting the dust hood grinder.
  • the dust hood is equipped with a hood body for unilaterally covering a major part of the grinding wheel.
  • the dust hood has a cover sector which can be displaced in the circumferential direction of the hood body along the hood body and which is provided for covering and releasing a remaining part of the grinding wheel on demand in a gradual manner.
  • the dust hood has a suction connection via which a background removal can be extracted from the hood body.
  • a web is provided which at least partially separates a main chamber defined by the hood body from a segment chamber defined by the hood sector.
  • Dust hoods of the type mentioned are basically known from the prior art. They serve to prevent dust spreading during grinding work in order to protect the health of a user of the grinding device.
  • the invention is achieved in that the web has a web opening through which air can flow from the segment chamber into the main chamber.
  • the invention includes the recognition that with dust hoods of the prior art, more precisely in their displaceable hood sectors, there is too little underpressure in the suction operation and thus the hood sector is not sufficiently "flushed through.” This is the case, in particular, when the hood body, The hood sector, for example, is sealed to the environment by a comparatively dense curtain, for example a brush curtain, and has been observed to prevent optimum flow in the slidable hood sector.
  • a comparatively dense curtain for example a brush curtain
  • the web has at least one web opening, via which air can flow from the segment chamber into the main chamber.
  • the suction connection is connected to the hood body via a connection socket.
  • the connection socket is preferably oriented tangentially to the grinding wheel and / or the connection socket defines a suction channel running tangentially to the grinding wheel. It has proven to be advantageous if the web opening formed on the web is aligned with the connection socket. Such an escape may be in a slice plane of the grinding wheel or a plane parallel thereto.
  • the web has an overall length and the third of the total length lying closest to the connection base has one or more web openings. It is particularly advantageous if the web has an overall length, and only the third of the overall length which is closest to the connecting base has one or more web openings.
  • a sector opening is formed in a surface of the hood sector, via which ambient air can flow into the segment chamber.
  • this surface of the hood sector is oriented perpendicular to the axis of rotation of the grinding wheel, in other words, preferably, a surface normal of the surface of the hood sector is parallel to the axis of rotation of the grinding wheel. It has been recognized that by providing one or more sector openings in the surface of the hood sector, in particular the surface of the hood sector facing the grinding device, flushing of the hood sector and in direct consequence of the hood body can be further improved.
  • the web opening formed in the web and the sector opening formed in the hood sector act together in a synergistic manner.
  • the sector opening based on the direction of rotation of the grinding wheel and from the viewpoint of the grinder, is arranged to the right of a connection socket of the suction connection.
  • the hood sector has an outer sector length, which defines a circular sector starting from the axis of rotation of the grinding wheel, the sector opening being located in one third, preferably only in the third of the circular sector, which in total has the greatest distance to the connection base.
  • a minimum distance between the sector opening and the axis of rotation of the grinding wheel can be greater than four-fifths of the largest diameter of the hood body.
  • the web in the direction of the axis of rotation of the grinding wheel, extends vertically.
  • the web can predominantly be located on the side of the grinding wheel facing the grinding device.
  • the web is fixed to the hood body.
  • the web may be stationary to the sliding hood sector. It can be provided both a web on the hood body and a corresponding web on hood sector.
  • the passage opening is formed through which ambient air can flow into the hood body.
  • the passage opening based on the direction of rotation of the grinding wheel and from the viewpoint of the grinder, is arranged to the right of a connection base of the suction connection.
  • the dust hood is equipped with a curtain running along a circumference of the hood body for at least partially sealing the hood body with respect to a substrate to be machined by means of the grinding wheel.
  • a curtain may also be provided.
  • the curtain and / or the curtains are designed as brush curtains.
  • the object is also achieved by a grinding device with a gear neck and with a dust hood of the type described above, wherein the dust hood is arranged on the gear neck, or to be arranged.
  • Fig. 1 shows a preferred embodiment of a dust hood according to the invention in
  • Fig. 2 shows another preferred embodiment of an inventive
  • Fig. 3 shows the embodiment of Figure 1 arranged on a grinding device
  • FIG. 4 is a plan view of the embodiment of the dust hood of Figures 1 and 3.
  • FIG. 1 A preferred embodiment of a dust hood 100 according to the invention is shown in FIG.
  • the dust hood 100 is equipped with a hood body 10 for unilaterally covering a major part of a grinding wheel (see the indicated grinding wheel 220 in FIG.
  • the dust hood 100 has a hood sector 20 which can be displaced in the circumferential direction U of the hood body 10 along the hood body 10, more precisely rotatable. By means of the hood sector 20, if necessary, a remaining part of the grinding wheel can be gradually covered and / or released.
  • the dust hood 100 has a suction connection 40, via which a background removal from the hood body 10 can be sucked off. Between the hood body 10 and the hood sector 20, a web 50 is provided which at least partially separates a main chamber 15 defined by the hood body 10 from a segment chamber 25 defined by the hood sector 20.
  • three web openings 55 are formed (see also Fig. 2) can flow via the air L from the segment chamber 25 into the main chamber 15.
  • the suction connection 40 is connected to the hood body 10 via a connection base 45, which is oriented in the tangential direction T to the grinding wheel.
  • the web openings 55 are aligned with the connection socket 45.
  • alignment means on the one hand, that the web openings 55 are located even in a tangential flight, as seen from the connection socket 45.
  • the web openings 55 are themselves aligned with the tangentially extending connection socket 45 in their shape within the web 50.
  • the flanks of the web openings have an angle of approximately 45 Degrees.
  • the web 50 intersects the hood body 10 in the sense of a secant.
  • the web 50 has an overall length GL. Only in the, the terminal socket 45 nearest third 1/3 GL are exactly the three web openings are located.
  • hood sector 20 In the hood sector 20 (in the upper region of FIG. 1), three sector openings 23 can be seen, which are formed in a surface OS (see FIG. 4) of the hood sector 20. Ambient air UL can flow into the segment chamber 25 via these sector openings 23.
  • the web openings 55 described with reference to FIG. 1, via which air L can flow from the segment chamber 25 into the main chamber 15, can be recognized particularly well.
  • the dust hood 100 of FIG. 2 is equipped with a curtain 30 extending along a circumference U of the hood body 10 for at least partially sealing the hood body 10 with respect to a substrate to be processed by means of the grinding wheel. Also in hood sector 20, a curtain 30 'is provided. In the presently illustrated embodiment, the curtains 30, 30 'are formed as brush curtains.
  • five passage openings 13 are formed in a surface facing the grinder OF OF the hood body (shown in phantom in Fig. 2, as located on the back) can flow through the ambient air UL in the hood body 10. These through holes 13 provide additional air pressure equalization within the dust hood.
  • Fig. 3 now shows the dust hood 100 of Fig. 1, which is arranged on a grinder 200 (shown schematically).
  • the grinder 200 has a gear neck 210 for attachment of the dust hood 100.
  • the grinding wheel 220 schematically indicated here is set in rotation via the drive spindle 230, specifically in the direction of rotation DR about the rotation axis R of the grinding wheel 220.
  • the web 50 extends vertically in the direction of the axis of rotation R of the grinding wheel 220.
  • the web 50 is located predominantly on the side ZS of the grinding wheel 220 facing the grinding device 200.
  • a graduation 59 formed in the vertical web 50 a remaining portion of the grinding wheel 220 can protrude beyond the web 50 into the sliding hood sector 20, which is not shown in FIG. 3 for reasons of clarity.
  • exactly three sector openings 23 are arranged in a surface OS of the hood sector 20.
  • Ambient air UL can flow into the segment chamber 25 (see FIG. 1) via these sector openings 23.
  • the surface OS is the surface OS of the hood sector 20 facing the grinder 200 (not shown here).
  • the sector openings 23, relative to the direction of rotation DR of the grinding wheel and from the viewpoint of the grinding device, are arranged to the right of the connection base 45 of the suction connection 40.
  • the hood sector 20 has an outer sector length SL which, starting from the axis of rotation R of the grinding wheel 220 (indicated in FIG. 4 by the curved dashed-dotted line), defines a circular sector KS.
  • the three sector openings 23 are located only in the third of the circular sector KS, which in total has the greatest distance to the connection base 45. In the presently illustrated embodiment, this is the right third, a third KS, which is approximately opposite the terminal base 45.
  • a minimum distance MA between the sector opening 23 and the axis of rotation R of the grinding wheel 220 is greater than approximately four fifths of the largest diameter GD of the hood body 10.

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

La présente invention concerne un collecteur de poussière (100) pour une meuleuse (200) comprenant un collet de transmission (210), pour fixer le collecteur de poussière (100), comportant: un corps de collecteur (10), pour recouvrir d'un côté une partie prépondérante d'une meule abrasive (220), le collecteur de poussière (100) comprenant un secteur de collecteur (20) pouvant se déplacer, dans la direction circonférentielle (U) du corps de collecteur (10), le long du corps de collecteur (10), ledit secteur, si nécessaire, recouvrant et découvrant progressivement une partie restante de la meule abrasive (220) ; et un raccord d'aspiration (40), permettant d'aspirer un enlèvement du fond hors du corps de collecteur (10), entre le corps de collecteur (10) et le secteur de collecteur (20) une entretoise (50) étant disposée, laquelle sépare, au moins partiellement, la chambre principale (15), définie par le corps de collecteur (10), d'une chambre de segment (25), laquelle est définie par le secteur de collecteur (20), l'entretoise (50) comportant une ouverture d'entretoise (55) par laquelle l'air (L) peut s'écouler de la chambre de segment (25) vers la chambre principale (15).
EP17808813.4A 2016-12-06 2017-11-16 Capot anti-poussière pour meuleuse Active EP3551382B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16202365.9A EP3332910A1 (fr) 2016-12-06 2016-12-06 Capot anti-poussière pour meuleuse
PCT/EP2017/079402 WO2018104016A1 (fr) 2016-12-06 2017-11-16 Collecteur de poussière d'une meuleuse

Publications (2)

Publication Number Publication Date
EP3551382A1 true EP3551382A1 (fr) 2019-10-16
EP3551382B1 EP3551382B1 (fr) 2020-09-30

Family

ID=57542730

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16202365.9A Withdrawn EP3332910A1 (fr) 2016-12-06 2016-12-06 Capot anti-poussière pour meuleuse
EP17808813.4A Active EP3551382B1 (fr) 2016-12-06 2017-11-16 Capot anti-poussière pour meuleuse

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16202365.9A Withdrawn EP3332910A1 (fr) 2016-12-06 2016-12-06 Capot anti-poussière pour meuleuse

Country Status (2)

Country Link
EP (2) EP3332910A1 (fr)
WO (1) WO2018104016A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114952519A (zh) * 2022-06-13 2022-08-30 滁州合一智控有限公司 一种五金件打磨成型设备

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8523637B2 (en) * 2009-07-21 2013-09-03 Dustless Depot, Llc Angle grinder dust shroud with slideable access hatch
CN202357043U (zh) * 2011-11-24 2012-08-01 上海新朋实业股份有限公司 角磨机护罩结构
DE102012001925A1 (de) * 2012-02-02 2013-08-08 Schleif- und Fräswerkzeuge Höhn Ltd. & Co. KG Oberflächenschleifer, insbesondere Betonschleifer

Also Published As

Publication number Publication date
EP3551382B1 (fr) 2020-09-30
EP3332910A1 (fr) 2018-06-13
WO2018104016A1 (fr) 2018-06-14

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