EP3551381B1 - Capot anti-poussière pour meuleuse - Google Patents

Capot anti-poussière pour meuleuse Download PDF

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Publication number
EP3551381B1
EP3551381B1 EP17804201.6A EP17804201A EP3551381B1 EP 3551381 B1 EP3551381 B1 EP 3551381B1 EP 17804201 A EP17804201 A EP 17804201A EP 3551381 B1 EP3551381 B1 EP 3551381B1
Authority
EP
European Patent Office
Prior art keywords
hood
dust
sector
dust hood
opening
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
EP17804201.6A
Other languages
German (de)
English (en)
Other versions
EP3551381A1 (fr
Inventor
Sarah Cziepluch
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
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Hilti AG
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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
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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
    • 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 grinding device equipped with a gear neck for fastening the dust hood.
  • the dust hood has a hood body for one-sided covering of a predominant part of the grinding wheel.
  • the dust hood is further equipped with a hood sector which can be displaced in the circumferential direction of the hood body along the hood body and is provided for gradually covering and releasing a remaining part of the grinding wheel as required.
  • the dust hood also has a suction connection, via which subsurface material can be extracted from the hood body.
  • Dust hoods of the type mentioned are basically known from the prior art. They serve to prevent the spread of dust during grinding work in order to protect the health of a user of the grinding device.
  • a dust hood according to the preamble of claim 1 is e.g. on the website https://www.hilti.at/medias/sys_master/documents/ h2b / 9144162943006 / DG-EX_125_5_PUB_5223233_000.pdf disclosed.
  • a hand-held concrete grinder comprises a funnel-shaped suction hood, with a secondary air opening being provided in the interior of the hood, which is designed over a large area and covered like a gill.
  • the web has at least one web opening through which air can flow from the segment chamber into the main chamber.
  • the invention includes the knowledge that with dust hoods of the prior art, in particular those with a comparatively dense curtain, for example a brush element, there is a very high negative pressure due to the dust extraction. On the one hand, this has a negative impact on the extraction of the material removed from the substrate (dust) and on the force to be applied by the user to move the grinding device. It was also recognized that dust hoods of the prior art can lead to stuck dust accumulations, especially in the hood body, if it is not cleaned properly (ie with the appropriate air pressure) by the air sucked in in the suction connection.
  • the through opening is arranged in a semicircular segment of the hood body opposite the displaceable hood sector.
  • the through opening can be arranged to the right of a connection socket of the suction connection.
  • the surface of the hood body facing the grinding device, in which the at least one through opening is formed is 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 preferably run parallel to one another.
  • a plurality of through openings is provided.
  • at least 5 through openings are formed in the surface of the hood body facing the grinding device.
  • the through-openings can, based on the direction of rotation of the grinding wheel, be lined up in a chain-like manner and / or forming a segment of a circular arc.
  • the distance between two through openings that are adjacent to one another is smaller than the greatest extent of a respective through opening. If two adjacent through-openings are, for example, circular, their distance from one another (based on the points of the circle which are closest to one another) is smaller than a respective diameter of the circular through-opening.
  • the dust hood is equipped with a curtain running along a circumference of the hood body for sealing the hood body at least in sections against a substrate to be processed by means of the grinding wheel.
  • a curtain is preferably also provided in the hood sector.
  • the curtain can 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 has at least one web opening through which air can flow from the segment chamber into the main chamber.
  • At least one sector opening through which ambient air can flow into the segment chamber can be formed in a surface of the hood sector.
  • 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, the dust hood being or to be arranged on the gear neck.
  • FIG Fig. 1 A preferred embodiment of a dust hood 100 according to the invention is shown in FIG Fig. 1 shown.
  • the dust hood 100 has a hood body 10 for one-sided covering of a predominant part of a grinding wheel 220 (grinding wheel 220 indicated in FIG Fig. 2 ) on.
  • the dust hood 100 is equipped with a hood sector 20 which can be displaced 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 a remaining part of the grinding wheel as required.
  • the dust hood 100 has a suction connection 40, via which subsurface material (dust) can be extracted from the hood body 10.
  • Fig. 1 shows the dust hood 100 from the perspective of the grinding device, the grinding device itself not being shown.
  • the surface OK of the hood body 10, in which the through openings 13 are formed, runs perpendicular to the axis of rotation R of the grinding wheel.
  • Fig. 1 can be removed, the through openings 13 are arranged in a semicircular segment HS of the hood body 10 opposite the displaceable hood sector 20.
  • the semicircular segment HS is spanned by a diameter D of the hood body 10, the diameter D intersecting a connection socket 45 of the suction connection 40.
  • the five identically formed through openings 13 are lined up in the circumferential direction U of the hood body 10.
  • the through openings 13 are arranged to the right of the connection socket 45 of the suction connection 40, based on the direction of rotation DR of the grinding wheel 220 and from the perspective of the grinding device 200.
  • a distance AB between two through openings 13 that are adjacent to one another is smaller than the greatest extent GE of a respective through opening 13.
  • Three sector openings 23 are formed in a surface OF of the hood sector 20, through which the ambient air UL enters the segment chamber 25 (cf. Fig. 2 ) can flow in.
  • Fig. 2 now shows the embodiment of Fig. 1 in bottom view.
  • the schematically indicated grinding device 200 is located on the back of the dust hood 100 of FIG Fig. 2 .
  • 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 which is defined by the hood sector 20.
  • the through openings 13 which allow ambient air to enter the main chamber 15, can be clearly seen.
  • the sector openings 23 formed in the hood sector 20, via which ambient air UL can flow into the segment chamber 25, can also be clearly seen.
  • the grinding wheel 220 is in Fig. 2 indicated by the arched dash-dot line. In the grinding operation, the grinding wheel 220 rotates about the axis of rotation R, which is defined by the drive spindle 230.
  • Fig. 3 shows a second embodiment of a dust hood 100 according to the invention from the perspective of the grinding device.
  • the through openings 13 'are circular.
  • Fig. 3 can be removed, exactly nine through openings 13 'are provided. Another number is possible.
  • two through openings 13 ′ adjacent to one another have a spacing AB ′ which is smaller than the largest extension GE ′ of a respective through opening 13 ′.
  • two circular sector openings 23 ' are formed in the surface OF of the hood sector 20, through which ambient air UL can flow into the segment chamber (here on the rear side, not shown).
  • FIG Fig. 4 Another preferred embodiment of the dust hood 100 according to the invention is shown in FIG Fig. 4 shown.
  • a surface OK of the hood body 10 that is perpendicular to the axis of rotation R, there are exactly five through openings 13 'designed as slots.
  • the distance AB "two mutually adjacent through openings 13" is smaller than the largest extension GE "of a respective through opening 13.
  • the greatest extension GE of a respective through opening 13" is oriented in the radial direction RR, whereas the distance AB between two mutually adjacent Through openings 13 ′′ is defined in the circumferential direction U or the direction of rotation DR of the grinding wheel 220.
  • Fig. 5 now shows the embodiment of Fig. 2 in perspective view from below.
  • the dust hood 100 is equipped with a curtain 30 running along the circumference of the hood body 10, in this case a brush curtain, for at least some sections of the hood body 10 to be sealed off from a substrate to be processed (substrate not shown).
  • the hood sector 20 is also equipped with a curtain 30 ', in the embodiment shown here in the form of a brush curtain.
  • Fig. 5 Also easy to recognize in Fig. 5 is the web 50 which is provided between the hood body 10 and the hood sector 20 and which at least partially separates a main chamber 15 defined by the hood body 10 from a segment chamber 25 which is defined by the hood sector 20.
  • the web has three web openings 55. Air L can flow from segment chamber 25 into main chamber 15 via web openings 55.
  • connection socket 45 connected to the suction connection 40 opens into the main chamber 15 of the hood body 10. During the grinding operation, subsurface material is sucked off via this connection socket 15 and subsequently via the suction connection 40.
  • the through openings 13 which positively influence the suction behavior 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)

Claims (8)

  1. Collecteur de poussière (100) pour une meuleuse (200) équipée d'un prolongement de carter (210) pour la fixation du collecteur de poussière (100), comprenant un corps de collecteur (10) servant à recouvrir un côté d'une partie principale du disque de meulage (220), le collecteur de poussière (100) comportant un secteur de collecteur (20) qui peut coulisser dans le sens périphérique (U) du corps de collecteur (10) le long du corps de collecteur (10), qui est prévu pour recouvrir et dégager graduellement, au besoin, une partie restante du disque de meulage (220), et comprenant un raccord d'aspiration (40) permettant d'aspirer une matière, enlevée du substrat, hors du corps de collecteur (10),
    dans une surface (OK), tournée vers la meuleuse (200), du corps de collecteur (10), étant formée au moins une ouverture de passage (13), par laquelle de l'air ambiant (UL) peut s'écouler dans le corps de collecteur (10), une traverse (50) étant prévue entre le corps de collecteur (10) et le secteur de collecteur (20),
    caractérisé en ce que
    la traverse (50) comporte au moins une ouverture de traverse (55) par laquelle de l'air (L) peut s'écouler depuis la chambre de segment (25) dans la chambre principale (15).
  2. Collecteur de poussière (100) selon la revendication 1, caractérisé en ce que l'ouverture de passage (13) est agencée dans un segment semi-circulaire (HS), opposé au secteur de collecteur pouvant coulisser (20), du corps de collecteur (10).
  3. Collecteur de poussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une pluralité d'ouvertures de passage (13), de préférence au moins cinq ouvertures de passage (13), sont prévues.
  4. Collecteur de poussière (100) selon la revendication 3, caractérisé en ce que la distance (AB) entre deux ouvertures de passage voisines l'une de l'autre (13) est inférieure à l'extension la plus grande (GE) d'une ouverture de passage respective (13).
  5. Collecteur de poussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce que le collecteur de poussière (100) est équipé d'un rideau (30) s'étendant le long d'une périphérie (U) du corps de collecteur (10), pour l'étanchéification au moins en sections du corps de collecteur (10) vis-à-vis d'un substrat à usiner au moyen du disque de meulage (220), un rideau (30') étant également prévu dans le secteur de collecteur (20).
  6. Collecteur de poussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce que la traverse (50) sépare au moins partiellement une chambre principale (15) définie par le corps de collecteur (10) d'une chambre de segment (25), qui est définie par le secteur de collecteur (20).
  7. Collecteur de poussière (100) selon la revendication 1, caractérisé en ce qu'au moins une ouverture de secteur (23) est formée dans une surface (OF) du secteur de collecteur (20), par laquelle de l'air ambiant (UL) peut s'écouler dans la chambre de segment (25).
  8. Meuleuse (200) comprenant un prolongement de carter (210) et comprenant un collecteur de poussière (100) selon l'une quelconque des revendications précédentes, dans laquelle le collecteur de poussière (100) est agencé ou destiné à être agencé sur le prolongement de carter (210).
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 EP3551381A1 (fr) 2019-10-16
EP3551381B1 true 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)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111571337B (zh) * 2020-05-28 2021-12-07 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
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3332911A1 (fr) 2018-06-13
WO2018104098A1 (fr) 2018-06-14
EP3551381A1 (fr) 2019-10-16

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