EP3551382B1 - Capot anti-poussière pour meuleuse - Google Patents

Capot anti-poussière pour meuleuse Download PDF

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Publication number
EP3551382B1
EP3551382B1 EP17808813.4A EP17808813A EP3551382B1 EP 3551382 B1 EP3551382 B1 EP 3551382B1 EP 17808813 A EP17808813 A EP 17808813A EP 3551382 B1 EP3551382 B1 EP 3551382B1
Authority
EP
European Patent Office
Prior art keywords
hood
sector
web
dust hood
dust
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
EP17808813.4A
Other languages
German (de)
English (en)
Other versions
EP3551382A1 (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
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Filing date
Publication date
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Publication of EP3551382A1 publication Critical patent/EP3551382A1/fr
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Publication of EP3551382B1 publication Critical patent/EP3551382B1/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
    • 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 is equipped with a hood body to cover a major part of the grinding wheel on one side.
  • the dust hood has a hood sector which is displaceable in the circumferential direction of the hood body and which is provided for gradually covering and releasing a remaining part of the grinding wheel as required.
  • the dust hood has a suction connection which can be used to extract any subsurface material from the hood body.
  • 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.
  • Dust hoods of the type mentioned are basically known from the prior art, see for example document DE102012001925 A1 which discloses the preamble of claim 1. They serve to prevent the spread of dust 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 knowledge that in the case of dust hoods of the prior art, more precisely in their displaceable hood sectors, there is too little negative pressure in the suction operation and thus the hood sector is not “flushed” enough. This is particularly the case when the hood body or the hood sector is sealed off from the surroundings by a comparatively tight curtain, for example a brush curtain. It has been observed that this prevents an optimal flow in the movable or rotatable hood sector.
  • the web has at least one web opening through 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 been found to be advantageous if the web opening formed on the web is aligned with the connection socket. Such an alignment can lie in a wheel plane of the grinding wheel or a plane parallel to it.
  • the web has an overall length and the third of the total length closest to the connection socket has one or more web openings. It is particularly advantageous if the web has a total length and only the third of the total length closest to the connection socket has one or more web openings.
  • a sector opening is formed in a surface of the hood sector, through which the ambient air can flow into the segment chamber.
  • This surface of the hood sector is preferably oriented perpendicular to the axis of rotation of the grinding wheel, in other words a surface normal of the surface of the hood sector is preferably parallel to the axis of rotation of the grinding wheel. It was 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, immediately afterwards, the hood body can be further improved.
  • the web opening formed in the web and the sector opening formed in the hood sector act with one another in a synergetic manner.
  • the sector opening is particularly preferably arranged to the right of a connection socket of the suction connection, based on the direction of rotation of the grinding wheel and from the point of view of the grinding device.
  • the hood sector has an outer sector length which, starting from the axis of rotation of the grinding wheel, defines a sector of a circle, the sector opening being located in one third, preferably only in the third of the sector of the circle that is the greatest distance from 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 extends vertically in the direction of the axis of rotation of the grinding wheel.
  • the web can predominantly be located on the side of the grinding wheel facing the grinding device.
  • the web is particularly preferably fixed to the hood body.
  • the web can be stationary in relation to the displaceable hood sector. Both a web on the hood body and a corresponding web on the hood sector can be provided.
  • At least one passage opening is formed in a surface of the hood body facing the grinding device, through which the ambient air can flow into the hood body.
  • the through-opening is preferably arranged to the right of a connection socket of the suction connection, based on the direction of rotation of the grinding wheel and from the point of view of the grinding device.
  • 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 can also be provided in the hood sector.
  • the curtain and / or the curtains are preferably 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, 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 is equipped with a hood body 10 for covering a predominant part of a grinding wheel on one side (see the indicated grinding wheel 220 in FIG Fig. 3 ).
  • the dust hood 100 has a hood sector 20 which is displaceable, more precisely rotatable, in the circumferential direction U of the hood body 10 along the hood body 10. If necessary, a remaining part of the grinding wheel can be gradually covered and / or released by means of the hood sector 20.
  • the dust hood 100 has a suction connection 40, via which a subsurface material can be extracted from the hood body 10. 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 which is defined by the hood sector 20.
  • three web openings 55 are formed in the web 50 (see also FIG Fig. 2 ) can flow into the main chamber 15 via the air L from the segment chamber 25.
  • 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 base 45.
  • alignment means, on the one hand, that the web openings 55 themselves are located in a tangential alignment, viewed from the connection base 45.
  • this particular is off Fig. 2
  • the shape of the web openings 55 within the web 50 itself can be clearly seen in alignment with the tangentially extending connection socket 45. In FIG Fig. 2 The illustrated embodiment, the flanks of the web openings at an angle of approximately 45 degrees.
  • Fig. 1 It can again be clearly seen that 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 third 1/3 GL closest to the connection socket 45 are there exactly three web openings.
  • hood sector 20 In the hood sector 20 (in the upper area of the Fig. 1 ) three sector openings 23 can be seen, which are located in a surface OS (cf. Fig. 4 ) of the hood sector 20 are formed. Ambient air UL can flow into the segment chamber 25 via these sector openings 23.
  • Fig. 2 illustrated embodiment are those with reference to Fig. 1
  • the web openings 55 described, through which air L can flow from the segment chamber 25 into the main chamber 15, can be seen particularly well.
  • the dust hood 100 of the Fig. 2 is equipped with a curtain 30 running along a circumference U of the hood body 10 for at least partially sealing off the hood body 10 against a substrate to be processed by means of the grinding wheel.
  • a curtain 30 ' is also provided in the hood sector 20.
  • the curtains 30, 30 ' are designed as brush curtains.
  • the illustrated embodiment are in a surface OF the hood body facing the grinding device (in Fig. 2 shown in dashed lines, since five through openings 13 are formed on the rear side, through which ambient air UL can flow into the hood body 10. These through openings 13 ensure additional air pressure equalization within the dust hood.
  • Fig. 3 now shows the dust hood 100 of Fig. 1 , which is arranged on a grinding device 200 (shown schematically).
  • the grinding device 200 has a gear neck 210 for fastening the dust hood 100.
  • the grinding wheel 220 indicated schematically here is set in rotation via the drive spindle 230, specifically in the direction of rotation DR about the axis of rotation 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 predominantly located on the side ZS of the grinding wheel 220 facing the grinding device 200.
  • a step 59 formed in the vertical web 50 a remaining part of the grinding wheel 220 can be moved over the web 50 into the displaceable hood sector 20, which for reasons of clarity in FIG Fig. 3 is not shown, protrude.
  • Fig. 4 can also be removed, the sector openings 23, based on the direction of rotation DR of the grinding wheel and from the perspective of the grinding device, are arranged to the right of the connection socket 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 (in Fig. 4 indicated by the arcuate dash-dot line) defines a circular sector KS.
  • the three sector openings 23 are only located in the third of the circular sector KS which, in total, has the greatest distance from the connection base 45. In the exemplary embodiment shown here, this is the right third, a third KS, which is approximately opposite the connection socket 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)

Claims (12)

  1. Capot antipoussière (100) pour une meuleuse (200) munie d'un col de transmission (210) pour la fixation du capot antipoussière (100), comprenant un corps de capot (10) pour recouvrir d'un côté une majeure partie d'un disque abrasif (220), le capot antipoussière (100) présentant un secteur de capot (20) pouvant être déplacé dans la direction périphérique (U) du corps de capot (10) le long du corps de capot (10), qui est prévu pour recouvrir et libérer graduellement au besoin une partie restante du disque abrasif (220), et comprenant un raccord d'aspiration (40) par le biais duquel une partie enlevée du subjectile peut être aspirée depuis le corps de capot (10), une membrure (50) étant prévue entre le corps de capot (10) et le secteur de capot (20), laquelle sépare une chambre principale (15) définie par le corps de capot (10) au moins en partie d'une chambre de segment (25) définie par le secteur de capot (20),
    caractérisé en ce que la membrure (50) présente une ouverture de membrure (55) par le biais de laquelle de l'air (L) peut affluer depuis la chambre de segment (25) dans la chambre principale (15).
  2. Capot antipoussière (100) selon la revendication 1,
    caractérisé en ce que le raccord d'aspiration (40) est raccordé, par le biais d'un socle de raccordement (45) qui est orienté tangentiellement au disque abrasif (220), avec le corps de capot (10), et l'ouverture de membrure (55) est alignée avec le socle de raccordement (45).
  3. Capot antipoussière (100) selon la revendication 2,
    caractérisé en ce que la membrure (50) présente une longueur totale (GL) et seulement le tiers de la longueur totale (GL) le plus proche du socle de raccordement (45) présente une ou plusieurs ouvertures de membrure (55).
  4. Capot antipoussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce que dans une surface (OS) du secteur de capot (20) est réalisée une ouverture de secteur (23) par le biais de laquelle de l'air environnant (UL) peut affluer dans la chambre de segment (25).
  5. Capot antipoussière (100) selon la revendication 4,
    caractérisé en ce que le secteur de capot (20) présente une longueur de secteur extérieure (SL) qui définit, à partir de l'axe de rotation (R) du disque abrasif (220), un secteur de cercle (KS), l'ouverture de secteur (23) étant située seulement dans le tiers du secteur de cercle (KS) qui présente au total la plus grande distance par rapport au socle de raccordement (45).
  6. Capot antipoussière (100) selon la revendication 4 ou 5,
    caractérisé en ce qu'une distance minimale (MA) entre l'ouverture de secteur (23) et l'axe de rotation (R) du disque abrasif (220) est supérieure à quatre cinquièmes du plus grand diamètre (GD) du corps de capot (10).
  7. Capot antipoussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce que la membrure (50) s'étend verticalement dans la direction de l'axe de rotation (R) du disque abrasif (220).
  8. Capot antipoussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce que la membrure (50), lorsque le disque abrasif (220) est reçu dans le capot antipoussière (100), se trouve principalement sur le côté (ZS) du disque abrasif (220) tourné vers la meuleuse (200).
  9. Capot antipoussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce que la membrure (50) est fixe par rapport au corps de capot (10).
  10. Capot antipoussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins une ouverture de passage (13) est réalisée dans une surface (OF) du corps de capot (10) tournée vers la meuleuse (200), par le biais de laquelle l'air environnant (UL) peut affluer dans le corps de capot (10).
  11. Capot antipoussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce que le capot antipoussière (100) est muni d'un rideau (30) s'étendant le long d'une périphérie (U) du corps de capot (10) pour étanchéifier au moins en partie le corps de capot (10) par rapport à un subjectile (UG) devant être usiné au moyen du disque abrasif (220), un rideau (30') étant également prévu dans le secteur de capot (20).
  12. Meuleuse (200) comprenant un col de transmission (210) et un capot antipoussière (100) selon l'une quelconque des revendications précédentes, le capot antipoussière (100) étant ou devant être disposé au niveau du col de transmission (210).
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 EP3551382A1 (fr) 2019-10-16
EP3551382B1 true 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)

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

Families Citing this family (2)

* 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
CN115648038B (zh) * 2022-10-28 2025-07-11 通许县键晗鞋业有限公司 一种制鞋车间集中除尘装置

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

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
WO2018104016A1 (fr) 2018-06-14
EP3551382A1 (fr) 2019-10-16
EP3332910A1 (fr) 2018-06-13

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