EP3551381A1 - Collecteur de poussière d'une meuleuse - Google Patents

Collecteur de poussière d'une meuleuse

Info

Publication number
EP3551381A1
EP3551381A1 EP17804201.6A EP17804201A EP3551381A1 EP 3551381 A1 EP3551381 A1 EP 3551381A1 EP 17804201 A EP17804201 A EP 17804201A EP 3551381 A1 EP3551381 A1 EP 3551381A1
Authority
EP
European Patent Office
Prior art keywords
hood
dust
dust hood
sector
hood body
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
EP17804201.6A
Other languages
German (de)
English (en)
Other versions
EP3551381B1 (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 EP3551381A1 publication Critical patent/EP3551381A1/fr
Application granted granted Critical
Publication of EP3551381B1 publication Critical patent/EP3551381B1/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
    • 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
    • B24B55/04—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 attaching the dust hood grinder.
  • the dust hood has a hood body for unilaterally covering a major part of the grinding wheel.
  • the dust hood is further provided with a hood sector slidable along the hood body in the circumferential direction of the hood body and provided for gradually covering and releasing, as required, a remaining portion of the grinding wheel.
  • the dust hood also has a suction connection, via which a background removal 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 grinding work in order to protect the health of a user of the grinding device.
  • the object is achieved in that in a surface facing the grinder of the hood body at least one passage opening is formed through which ambient air can flow into the hood body.
  • the invention includes the recognition that in dust hoods of the prior art, in particular those with a comparatively dense curtain, for example a brush element, a very high negative pressure prevails through the dust extraction.
  • a very high negative pressure prevails through the dust extraction.
  • the suction of the background abrasion (dust) as well as the force to be applied by the user to move the grinder are adversely affected.
  • stagnant dust accumulations particularly in the hood body, can occur in dust hoods of the prior art if it is not properly cleaned (i.e., with the appropriate air pressure) by the air drawn in the suction port.
  • the passage opening is arranged in a half circle segment of the hood body opposite the sliding hood sector.
  • the passage opening can, based on the direction of rotation of the grinding wheel and from the viewpoint of the grinding device, be arranged to the right of a connection base of the suction connection.
  • the grinding device facing surface of the hood body in which the at least one through hole is formed oriented perpendicular to the axis of rotation of the grinding wheel.
  • the surface normal of said surface and the axis of rotation of the grinding wheel are parallel to each other.
  • passage openings Preferably, at least 5 through openings are formed in the surface of the hood body facing the grinding device.
  • the passage openings may, based on the direction of rotation of the grinding wheel, be chain-shaped and / or forming a circular arc section.
  • the distance between two mutually adjacent passage openings is smaller than the largest extension of a respective passage opening. If two adjacent passage openings are, for example, circular, their distance from one another (relative to the points of the circle closest to one another) is smaller than a respective diameter of the circular passage opening.
  • the dust hood is equipped with a curtain extending along a circumference of the hood body for at least partially sealing the hood body with respect to a substrate to be processed by means of the grinding wheel.
  • a curtain is preferably also provided.
  • the curtain may be provided in the form of a brush curtain.
  • a web is provided between the hood body and the hood sector, which at least partially separates a main chamber defined by the hood body from a segment chamber defined by the hood sector.
  • the web can have at least one web opening, via the air from the segment chamber can flow into the main chamber.
  • at least one sector opening can be formed, via which ambient air can flow into the segment chamber. In this way, the suction behavior of the dust hood can be further improved.
  • the object is also achieved by a grinding device, in particular an angle grinder, 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
  • Fig. 2 is a bottom view of the embodiment of FIG. 1 with indicated
  • FIG. 3 shows a second embodiment of a dust hood according to the invention
  • FIG. 4 shows a third embodiment of a dust hood according to the invention.
  • FIG. 5 the dust hood according to the first embodiment of Figures 1 and 2 in a perspective view from below.
  • FIG. 1 A preferred embodiment of a dust hood 100 according to the invention is shown in FIG.
  • the dust hood 100 has a hood body 10 for unilaterally covering a major part of a grinding wheel 220 (grinding wheel 220 indicated in FIG. 2). Further, the dust hood 100 is provided with a hood sector 20 slidable along the hood body 10 in the circumferential direction U of the hood body 10. The hood sector 20 is provided for gradually covering and releasing, as required, a remaining portion of the grinding wheel. Furthermore, the dust hood 100 has a suction connection 40, via which a background removal (dust) from the hood body 10 can be sucked off.
  • a background removal dust
  • Fig. 1 shows the dust hood 100 from the viewpoint of the grinder, wherein the grinder itself is not shown.
  • the surface OK of the hood body 10, in which the through holes 13 are formed, is perpendicular to the rotation axis R of the grinding wheel.
  • the passage openings 13 are arranged in a semicircular segment HS of the hood body 10 opposite the sliding hood sector 20.
  • the semicircular segment HS is clamped by a diameter D of the hood body 10, wherein the diameter D intersects a connection socket 45 of the suction connection 40.
  • the five identically formed passage openings 13 are lined up in the circumferential direction U of the hood body 10.
  • a distance AB between two mutually adjacent passage openings 13 is smaller than the largest extent GE of a respective passage opening thirteenth
  • FIG. 2 now shows the embodiment of FIG. 1 in a bottom view. Accordingly, the schematically indicated grinding device 200 is located on the rear side of the dust hood 100 of FIG. 2.
  • a web 50 is provided which at least partially separates a defined by the hood body 10 main chamber 15 of a segment chamber 25 which is defined by the hood sector 20.
  • the through-holes 13 which allow the entry of ambient air into the main chamber 15, can be clearly seen.
  • the grinding wheel 220 is indicated in Fig. 2 by the arcuate dot-dash line.
  • the grinding wheel 220 rotates in the grinding operation about the rotation axis R, which is defined by the drive spindle 230.
  • FIG. 3 shows a second exemplary embodiment of a dust hood 100 according to the invention from the perspective of the grinding device.
  • the passage openings 13 ' are circular.
  • FIG. 3 exactly nine passage openings 13 'are provided. Another number is conceivable.
  • two mutually adjacent passage openings 13' have a distance AB 'which is smaller than the largest extent GE' of a respective passage opening 13 '.
  • two circular sector openings 23 ' are formed in the surface OF of the hood sector 20, via which ambient air UL can flow into the segment chamber (here on the rear side, not shown).
  • FIG. 1 Another preferred embodiment of the dust hood 100 according to the invention is shown in FIG. In a direction perpendicular to the rotation axis R surface OK of the hood body 10 exactly five slots formed as through holes 13 'are arranged.
  • the distance AB "of two mutually adjacent passage openings 13" is smaller than the largest extension GE "a respective passage opening 13.
  • the largest extension GE of each passage opening 13" oriented in the radial direction RR, whereas the distance AB of two adjacent to each other Through openings 13 "in the circumferential direction U, or direction of rotation DR of the grinding wheel 220 is defined.
  • 5 now shows the embodiment of FIG. 2 in a perspective view from below.
  • the dust hood 100 is equipped with a running along the circumference of the hood body 10 curtain 30, in this case a brush curtain for at least partially sealing the hood body 10 against a substrate to be processed (substrate not shown).
  • the hood sector 20 is equipped with a curtain 30 ', in the present embodiment shown in the form of a brush curtain.
  • the web 50 which is provided between the hood body 10 and the hood sector 20 and which comprises a main chamber 15 defined by the hood body 10 at least partially by a segment chamber 25 defined by the hood sector 20. separates.
  • the web has three web openings 55. Via the web openings 55, air L can flow from the segment chamber 25 into the main chamber 15.
  • the connection socket 45 connected to the suction connection 40 opens into the main chamber 15 of the hood body 10. About this connection base 15 and in the further course on the suction port 40 takes place in the grinding operation, a suction of substrate removal.
  • the sucking behavior positively influencing through holes 13 can be seen in the lower part 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

L'invention concerne un collecteur de poussière (100) pour une meuleuse (200) pourvue d'un prolongement de carter (210) pour la fixation du collecteur de poussière (100), comprenant un corps de collecteur (10) servant à recouvrir une face d'une partie principale de la meule abrasive (220), le collecteur de poussière (100) présentant un secteur (20) qui peut coulisser dans le sens périphérique (U) du corps de collecteur (10) le long de ce dernier (10), et qui est conçu pour recouvrir et dégager graduellement, le cas échéant, une partie restante de la meule abrasive (220) et un raccord d'aspiration (40) permettant d'aspirer la matière, enlevée du substrat, hors du corps de collecteur (10). Dans une surface (OK), orientée vers la meuleuse (200), du corps de collecteur (10), est ménagée au moins une ouverture de passage (13) par laquelle de l'air ambiant (UL) peut s'écouler dans le corps de collecteur (10).
EP17804201.6A 2016-12-06 2017-11-28 Capot anti-poussière pour meuleuse Active EP3551381B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16202368.3A EP3332911A1 (fr) 2016-12-06 2016-12-06 Capot anti-poussière pour meuleuse
PCT/EP2017/080577 WO2018104098A1 (fr) 2016-12-06 2017-11-28 Collecteur de poussière d'une meuleuse

Publications (2)

Publication Number Publication Date
EP3551381A1 true EP3551381A1 (fr) 2019-10-16
EP3551381B1 EP3551381B1 (fr) 2020-12-30

Family

ID=57485407

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16202368.3A Withdrawn EP3332911A1 (fr) 2016-12-06 2016-12-06 Capot anti-poussière pour meuleuse
EP17804201.6A Active EP3551381B1 (fr) 2016-12-06 2017-11-28 Capot anti-poussière pour meuleuse

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16202368.3A Withdrawn EP3332911A1 (fr) 2016-12-06 2016-12-06 Capot anti-poussière pour meuleuse

Country Status (2)

Country Link
EP (2) EP3332911A1 (fr)
WO (1) WO2018104098A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111571337A (zh) * 2020-05-28 2020-08-25 哈尔滨理工大学 一种基于浮动磨具的大尺寸平面件高精度液压驱动磨床

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113400121A (zh) * 2021-07-14 2021-09-17 金华市高就机电设备有限公司 吸尘罩及其构成的墙面打磨机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29908648U1 (de) * 1999-05-15 2000-09-21 Robert Bosch Gmbh, 70469 Stuttgart Handgeführter Betonschleifer
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111571337A (zh) * 2020-05-28 2020-08-25 哈尔滨理工大学 一种基于浮动磨具的大尺寸平面件高精度液压驱动磨床

Also Published As

Publication number Publication date
EP3551381B1 (fr) 2020-12-30
EP3332911A1 (fr) 2018-06-13
WO2018104098A1 (fr) 2018-06-14

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