EP3551380B1 - Capot anti-poussière pour une tronçonneuse - Google Patents

Capot anti-poussière pour une tronçonneuse Download PDF

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Publication number
EP3551380B1
EP3551380B1 EP17805185.0A EP17805185A EP3551380B1 EP 3551380 B1 EP3551380 B1 EP 3551380B1 EP 17805185 A EP17805185 A EP 17805185A EP 3551380 B1 EP3551380 B1 EP 3551380B1
Authority
EP
European Patent Office
Prior art keywords
hood
cut
wheel
inflow opening
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.)
Active
Application number
EP17805185.0A
Other languages
German (de)
English (en)
Other versions
EP3551380A1 (fr
Inventor
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
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP3551380A1 publication Critical patent/EP3551380A1/fr
Application granted granted Critical
Publication of EP3551380B1 publication Critical patent/EP3551380B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B24B55/04—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 dust hood for a grinder equipped with a gear neck for attaching the dust hood.
  • the dust hood is equipped with a hood body for at least partially covering a circular grinding wheel and with a suction connection via which a subsurface removal can be sucked out of the hood body.
  • a main suction channel connected to the suction connection is formed in the hood body, which extends tangentially to the grinding wheel and is located on a connection side of the hood body.
  • Dust hoods of the type mentioned are basically known from the prior art. They serve to prevent dust from spreading during cutting work, in order to protect the health of the user of the cut-off machine.
  • JP 2013 173 232 A discloses a method of cutting reinforced concrete.
  • the document JP 2013 173 232 A also discloses the preamble of claim 1.
  • an inflow opening is formed in a rear side of the hood body opposite the connection side, through which ambient air can flow into the hood body in the separation mode.
  • the invention includes the finding that dust hoods of the prior art already have a comparatively good extraction behavior, but a significant reduction in the fine dust concentration is desirable. It has been recognized that dust hoods of the prior art emit fine dust on the back of the hood body, since abrasion of the subsoil (fine dust) is typically not completely captured and transported away by the main suction duct.
  • the rear side of the hood body is to be understood as meaning the side of the hood body on which the circular cutting disk, in relation to the direction of rotation of the cutting disk, dips into the substrate to be cut.
  • connection side and the back can be based on a partial plane, opposite, the partial plane is preferably spanned by the axis of rotation Cutting disc and a straight line that runs parallel to the main suction channel that extends tangentially to the cutting disc.
  • a further advantage has been shown to be that the dust hood according to the invention can be made significantly narrower than dust hoods of the prior art.
  • the inflow opening is provided in addition to a window outlet opening of the hood body.
  • a disk exit opening of the hood body means the opening of the hood body at which the circular cutting disk protrudes beyond the hood body for the cutting operation.
  • the inflow opening according to the invention differs from this disc outlet opening. This has the advantage that the improved extraction performance is also achieved when the cutting disc is fully immersed in the substrate (full cut).
  • the inflow opening is designed as a slot.
  • the slot can open up the hood body in the radial direction in relation to the cutting disk.
  • the inflow opening can open up the hood body in the axial direction in relation to the cutting disk.
  • the inflow opening which is designed as a slit, lies in a disk plane of the cutting disk.
  • the inflow opening is also advantageously formed on an end face of the hood body.
  • the inflow opening defines a circular sector with a maximum of 30 degrees, the circular sector being related to the direction of rotation of the cutting disk along an end face of the hood body.
  • the width of the inflow opening is at most half the width of a hood body on the rear side of the hood body.
  • the widths are determined in the axial direction.
  • the main suction channel is divided by a hood web into two suction chambers, which are preferably symmetrical to one another.
  • the hood web can lie in a disk plane of the cutting disk.
  • the object is also achieved by a cut-off machine, in particular a diamond cut-off machine, with a gear neck and with a dust hood of the type described above, the dust hood being arranged or to be arranged on the gear neck.
  • FIG. 1 shows a dust hood 100 according to the invention, which is arranged on a cut-off machine 200.
  • the cut-off machine 200 has a gear neck 210 to which the dust hood 100 is attached.
  • the dust hood 100 is equipped with a hood body 10 for covering a circular cutting disk 220 at least in sections.
  • the dust hood 100 also has a suction connection 40, via which a subsoil can be removed (cf. 3 Subsoil removal S) can be sucked out of the hood body 10.
  • the exhaust port 40 is connected to a main exhaust duct 50 formed in the hood body 10 .
  • the main suction channel 50 extends in the tangential direction T to the cutting disk 220 and is located on a connection side AS of the hood body 10 .
  • An inflow opening 60 is formed in a rear side RS of the hood body 10 opposite the connection side AS, through which ambient air (cf. 3 Ambient air UL) can flow into the hood body 10.
  • connection side AS and the rear side RS are opposite one another in relation to a partial plane TE.
  • the partial plane TE is spanned by the axis of rotation RA of the cutting disk 220 and a straight line G, which runs parallel to the main suction channel 50 extending tangentially to the cutting disk 220 .
  • the inflow opening 60 is provided in addition to a window outlet opening 70 of the hood body 10 .
  • the circular cutting disc 220 is completely enclosed, apart from its portion in the area of the disc outlet opening 70 . Relative to the radial direction RR, the circular separating disk 220 does not emerge from the inflow opening 60 on the rear side RS of the hood body.
  • the inflow opening 60 is designed as a slot which opens the hood body 10, based on the cutting disk 220, in the radial direction RR.
  • the inflow opening 60 embodied as a slit lies at least partially in a disk plane SE of the cutting disk 220 (in 1 represented by the normal arrow of the pane plane SE).
  • the inflow opening 60 which is designed as a slit, is formed on an end face 15 of the hood body 10.
  • the main suction channel 50 is further divided by a hood web 20 into two suction chambers 30, 30', which are symmetrical to one another in the exemplary embodiment shown here.
  • the hood web 20 lies in the disk plane SE of the cutting disk 220.
  • In 2 is the dust hood of 1 shown in perspective.
  • the inflow opening 60 which is designed as a slit and is arranged on the rear side RS of the hood body 10, is clearly visible.
  • the circular cutting disk 220 indicated by dashed lines is immersed into the subsurface U to the maximum extent.
  • the window outlet opening 70 of the hood body 10 rests on the base U.
  • the inflow opening 60 provided in addition to the pane outlet opening 70 allows ambient air UL to flow into the hood body 10 in separation mode.
  • a width BS of the inflow opening 60 is at most half as large as a hood body width BH on the back RS of the hood body 10.
  • the width BS and the hood body width BH are each related to the axial direction AR.
  • FIG 3 now shows a sectional view of the dust hood 100 of FIG 2 , which is in full section. Again 3 can be removed, the circular cutting disk 220 is maximally immersed in the subsurface U.
  • the separating disk 220 is in the separating mode and is therefore driven in the direction of rotation R; at the same time, a suction power is provided via the suction connection 40 .
  • a subsoil removal S which originates from the subsoil U, is sucked off via the main suction channel 50 extending tangentially to the cutting wheel 220 and the suction connection 40 .
  • the largest proportion of the extracted air runs via a primary flow path PP, which 3 is shown in the form of solid arrowed lines. Air with a high particle concentration is conveyed along the primary flow path PP via the main suction channel 50 in the direction of the suction port 40 .
  • a part of the primary flow path PP runs through the inflow opening 60 formed according to the invention on the rear side RS of the hood body 10. This is shown in FIG 3 represented by the ambient air UL entering the inflow opening 60 .
  • a secondary flow path SK is also induced by the inflow opening 60, in 3 represented by the dashed and arrowed line flowing through a secondary flow area SB.
  • the secondary flow area is defined by the air gap between the end face 15 of the hood body 20 and the outer circumference of the circular cutting disk 220.
  • the Driving the circular cutting disk 220 in the direction of rotation R generates a vortex field in which a comparatively low concentration of subsoil erosion S prevails.
  • the secondary flow path SK is guided onto the primary flow path PP when it leaves the secondary flow area SB, more precisely in the area of the inflow opening 60 .
  • underground debris S that was not sucked off through the original primary flow path PP in the direction of the suction port 40 can now be “collected” and sucked off.
  • an escape of "lost" particles is thus effectively avoided. As already mentioned at the outset, this improves the cooling of the cutting wheel 220 and enables higher cutting speeds and tool service lives.
  • the inflow opening 60 designed as a slit is formed on a rear side RS of the hood body 10 .
  • the rear RS is, based on the partial level TE, opposite the connection side AS.
  • the inflow opening 60 is limited by a circular sector KS with a maximum of 30 degrees.

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 (11)

  1. Collecteur de poussière (100) pour une meuleuse d'angle (200) équipée d'un col de transmission (210) pour la fixation du collecteur de poussière (100), avec un corps de collecteur (10) pour recouvrir au moins par sections un disque de coupe circulaire (220), et avec un raccord d'aspiration (40) par l'intermédiaire duquel une matière enlevée du substrat (S) peut être aspirée hors du corps de collecteur (10), un canal d'aspiration principal (50) relié au raccord d'aspiration (40) étant réalisé dans le corps de collecteur (10), lequel canal s'étend tangentiellement au disque de coupe (220) et se trouve sur un côté de raccordement (AS) du corps de collecteur (10),
    caractérisé en ce qu'une ouverture d'entrée (60) est réalisée dans un côté arrière (RS) du corps de collecteur (10) opposé au côté de raccordement (AS), par l'intermédiaire de laquelle l'air ambiant (UL) peut entrer dans le corps de collecteur (10) en mode de coupe, l'ouverture d'entrée (60) étant réalisée sous forme de fente et définissant, par rapport à la direction de rotation (R) du disque de coupe (220) et le long d'un côté frontal (15) du corps de collecteur (10), un secteur de cercle (KS) d'au plus 30 degrés.
  2. Collecteur de poussière (100) selon la revendication 1,
    caractérisé en ce que l'ouverture d'entrée (60) est prévue en plus d'une ouverture de sortie de disque (70) du corps de collecteur (10).
  3. Collecteur de poussière (100) selon la revendication 1 ou 2,
    caractérisé en ce que la fente formant l'ouverture d'entrée (60) ouvre le corps de collecteur (10) dans la direction radiale (RR) par rapport au disque de coupe (220).
  4. Collecteur de poussière (100) selon la revendication 3,
    caractérisé en ce que l'ouverture d'entrée (60) réalisée sous forme de fente se situe dans un plan de disque (SE) du disque de coupe (220).
  5. Collecteur de poussière (100) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que l'ouverture d'entrée (60) est réalisée sur un côté frontal (15) du corps de collecteur (10).
  6. Collecteur de poussière (100) selon la revendication 1 ou 2,
    caractérisé en ce que l'ouverture d'entrée (60) est réalisée axialement dans le corps de collecteur (10) par rapport au disque de coupe (220).
  7. Collecteur de poussière (100) selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'une largeur (BS) de l'ouverture d'entrée (60) est au moins deux fois plus petite qu'une largeur de corps de collecteur (BH) sur le côté arrière (RS) du corps de collecteur (10), les largeurs (BS, BH) étant déterminées dans la direction axiale (AR).
  8. Collecteur de poussière (100) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que le canal d'aspiration principal (50) est divisé par une entretoise de collecteur (20) en deux chambres d'aspiration (30, 30'), qui sont de préférence symétriques l'une par rapport à l'autre.
  9. Collecteur de poussière (100) selon la revendication 7,
    caractérisé en ce que l'entretoise de capot (20) est située dans un plan de disque (SE) du disque de coupe (220).
  10. Collecteur de poussière (100) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que le côté de raccordement (AS) et le côté arrière (RS) sont opposés par rapport à un plan partiel (TE), le plan partiel (TE) étant défini par l'axe de rotation (RA) du disque de coupe (220) et une droite (G) qui est parallèle au canal d'aspiration principal (50) s'étendant tangentiellement au disque de coupe (220).
  11. Meuleuse d'angle (200), notamment meuleuse d'angle à diamant, avec un col de transmission (210) et avec un collecteur de poussière (100) selon l'une quelconque des revendications précédentes, le collecteur de poussière (100) étant agencé ou à agencer sur le col de transmission (210).
EP17805185.0A 2016-12-06 2017-11-28 Capot anti-poussière pour une tronçonneuse Active EP3551380B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16202347.7A EP3332909A1 (fr) 2016-12-06 2016-12-06 Capot anti-poussière pour une tronçonneuse
PCT/EP2017/080601 WO2018104103A1 (fr) 2016-12-06 2017-11-28 Collecteur de poussière pour une meuleuse angulaire

Publications (2)

Publication Number Publication Date
EP3551380A1 EP3551380A1 (fr) 2019-10-16
EP3551380B1 true EP3551380B1 (fr) 2023-01-04

Family

ID=57544224

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16202347.7A Withdrawn EP3332909A1 (fr) 2016-12-06 2016-12-06 Capot anti-poussière pour une tronçonneuse
EP17805185.0A Active EP3551380B1 (fr) 2016-12-06 2017-11-28 Capot anti-poussière pour une tronçonneuse

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16202347.7A Withdrawn EP3332909A1 (fr) 2016-12-06 2016-12-06 Capot anti-poussière pour une tronçonneuse

Country Status (3)

Country Link
EP (2) EP3332909A1 (fr)
DK (1) DK3551380T3 (fr)
WO (1) WO2018104103A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3736086A1 (fr) * 2019-05-07 2020-11-11 Hilti Aktiengesellschaft Dispositif de hotte aspirante des poussières pour un appareil-outil ainsi que son utilisation et son procédé d'aspiration des poussières
CN116100443A (zh) * 2022-12-07 2023-05-12 许春雷 一种具有防护结构的开槽预操作演示刻线专用砂轮机及防护方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8381711B2 (en) * 2009-06-16 2013-02-26 Dustless Depot, Llc Universal dust collection shroud for high speed gas powered saws
JP6111382B2 (ja) * 2012-01-24 2017-04-12 株式会社 アクティブ 鉄筋コンクリートの切削方法
DE202015006749U1 (de) * 2015-09-26 2015-11-09 Ralf Biedron Zweikanal Saugstutzen für Universal Absaughaube

Also Published As

Publication number Publication date
WO2018104103A1 (fr) 2018-06-14
EP3332909A1 (fr) 2018-06-13
EP3551380A1 (fr) 2019-10-16
DK3551380T3 (da) 2023-02-06

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