EP3551377A1 - Collecteur de poussière pour une meuleuse angulaire - Google Patents

Collecteur de poussière pour une meuleuse angulaire

Info

Publication number
EP3551377A1
EP3551377A1 EP17800894.2A EP17800894A EP3551377A1 EP 3551377 A1 EP3551377 A1 EP 3551377A1 EP 17800894 A EP17800894 A EP 17800894A EP 3551377 A1 EP3551377 A1 EP 3551377A1
Authority
EP
European Patent Office
Prior art keywords
separating web
disc
dust hood
hood
cutting
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
EP17800894.2A
Other languages
German (de)
English (en)
Other versions
EP3551377B1 (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
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 EP3551377A1 publication Critical patent/EP3551377A1/fr
Application granted granted Critical
Publication of EP3551377B1 publication Critical patent/EP3551377B1/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

Definitions

  • the present invention relates to a dust hood for a equipped with a Getriebehals for fixing the dust hood cut-off machine.
  • the cut-off machine is equipped with a cap body for at least sections, covering both sides of a circular cutting disc and with a suction through which a background removal can be extracted from the hood body.
  • a cap body for at least sections, covering both sides of a circular cutting disc and with a suction through which a background removal can be extracted from the hood body.
  • the hood body connected to the suction is formed, which extends tangentially to the blade.
  • Dust hoods of the type mentioned are basically known from the prior art. They serve to prevent dust spreading during cutting operations in order to protect the health of a user of the cut-off grinder.
  • the object is achieved in that the Kleinabsaugkanal has a divider, which divides the Hauptabsaugkanal into two suction chambers.
  • the invention includes the realization that although dust hoods of the prior art already have a comparatively good extraction behavior, a further increase in the quality of the suction and thus a further reduced dust load of the user are nevertheless desirable.
  • a guide element is created which decisively improves the disadvantageous flow situation described above. Namely, there is a targeted deflection of air to be sucked together with background erosion in the created by the divider two suction chambers in the main suction. As a result, background abrasion is detected significantly less vortex and in particular avoids a central flow collision.
  • the two suction chambers are formed symmetrically to each other. It has proven to be advantageous if the separating web lies in a disk plane of the cutting disk.
  • the surface normal of the disk plane preferably runs parallel to the axis of rotation of the cutting disk or to a drive spindle of the cutting-off grinder.
  • hood body based on a section along the disk plane, is symmetrical.
  • the circular cutting disk and / or the separating web can be arranged centrally within the preferably symmetrical hood body.
  • the separating web can have a taper in the direction of the suction connection.
  • this taper is formed symmetrically, that is effective in two suction chambers.
  • a particularly good flow separation is achieved by the separating web in the direction of the preferably sleeve-shaped suction port.
  • a separating web thickness of the separating web is at most 20% greater than a slice thickness of the cutting disc to be received.
  • the separating web thickness or the disk thickness relate to the respective extent along the axis of rotation.
  • the dividing web thickness of the dividing web can be substantially the same size as the thickness of the dividing disk to be accommodated, except for a tapering of the dividing web thickness in the region of any intended tapering of the dividing web.
  • the separating web in the tangential direction extends to a disc outlet opening of the hood body.
  • disc outlet opening is a to understand such opening of the hood body from which protrudes the otherwise covered on both sides circular cutting disc.
  • the disc outlet opening can simultaneously define a footprint of the dust hood, which rests in full section substantially completely on the ground.
  • the separating web extends, in particular starting from a disk outlet opening of the hood body and / or in the tangential direction along the disk diameter, to the end of the cutting disk.
  • This extension can be understood as the total length of the hood body (without Hauptabsaugkanal and Absaugan gleich).
  • the object is also achieved by a power cutter with a gear neck and with a dust cover of the type described above, wherein the dust hood is arranged on the gear neck, or to be arranged.
  • a dividing web thickness of the dividing web is preferably at most 20% greater than a disk thickness of the cutting disk.
  • the divider can, in its course along the Hauptabsaugkanals, nestle against the circular cutting disc. Particularly preferably, a gap of at most 5 mm, preferably at most 3 mm, remains between the separating web and the separating disk, in the radial direction.
  • Fig. 1 shows a preferred embodiment of a dust hood according to the invention with a marked section line A-A along the Hauptabsaugkanals;
  • FIG. 2 shows a perspective rear view of the dust hood of FIG. 1 with section A-A;
  • Fig. 3 is a partial view of the dust hood of Figures 1 and 2 with a view from the ground in
  • Fig. 4 is a partial view of the dust hood of Figures 1 and 2 with a view from
  • Fig. 1 shows a preferred embodiment of a dust hood 100 according to the invention in an external view.
  • the dust hood 100 is designed for connection to a cut-off grinder 200, which is shown only schematically in FIG.
  • the angle grinder is an angle grinder.
  • the dust hood 100 is arranged at the rear on a gear neck 210 of the abrasive cutter 200.
  • the dust hood 100 of FIG. 1 has a hood body 10 for at least partially covering both sides of a circular cutting disk 220.
  • the cutting disc 220 is rotatably connected to a drive spindle 230 of the abrasive cutter 200. In separation mode, the cutting disc 220 rotates about its axis of rotation R in the direction of rotation DR.
  • the dust hood 100 has on its underside a disk outlet opening 70, from which a remaining part of the separating disk 220 projects out of the hood body 10.
  • the dust hood 100 is equipped with a suction connection 40, via which a background removal S (for example dust) can be sucked out of the hood body 10.
  • a background removal S for example dust
  • In the hood body 10 is connected to the suction port 40 Schoabsaugkanal 50 which extends in the tangential direction T along the cutting disc 220.
  • Fig. 1 Shown in Fig. 1 is a section line A-A through the Hauptabsaugkanal 50. This to illustrate the inventively provided separating web 20, which is apparent from Fig. 2.
  • Fig. 2 shows a back side of the embodiment of Fig. 1, wherein the Kleinabsaugkanal 50 is cut along the cut line A-A shown in Fig. 1.
  • the grinder 200 is not shown in Fig. 2.
  • the main suction channel 50 has a separating web 20 which divides the main suction channel 50 into two suction chambers 30, 30 '.
  • the two suction chambers 30, 30 ' are symmetrical to one another, wherein the separating web 20 lies in a disk plane SE of the cutting disk 220.
  • the surface normal of the disc plane SE runs parallel to the axis of rotation R of the cutting disc 220.
  • the main suction channel 50 and, correspondingly, the suction chambers 30, 30 'defined by the separating web 20 are in the tangential direction T to Cutting disc 220 extend.
  • the separating web 20 extends in the tangential direction T up to the disc outlet opening 70 of the hood body.
  • the separating web 20 furthermore extends, starting from the disk outlet opening 70 of the hood body 10 and the tangential direction T to the end of the separating disk 220.
  • the separating web has a length that is at least as long as an overall length GL of the hood body 10.
  • the separating web 20 In the direction of the suction connection 40, the separating web 20 has a symmetrical taper 25, which serves for the flow separation of the suction air AL.
  • a view of the Hauptabsaugkanal 50 in the viewing direction BU from below, a view of the Hauptabsaugkanal 50.
  • the divider 20 extends in the tangential direction T up to the disc outlet opening 70.
  • the separating web 20 closes flush with the disc outlet opening 70 from.
  • both the disk outlet opening 70 and the separating web 20 would rest on the substrate UG.
  • a separating web thickness TD of the separating web 20 is at most 20 percent greater than a slice thickness SD of the picked-up separating disk 220.
  • the separating web 20 nestles in its course along the Hauptabsaugkanals 50 to the circular cutting disc 220, wherein between the separating web 20 and blade 220 in the radial direction RR, a gap of at most 5 mm remains.
  • the cutting disk 220 is "framed" by the separating web 20 located in the disk plane SE at least in the region of the main suction channel 50.
  • FIG. 4 shows a section of the preferred exemplary embodiment of the dust hood from FIGS. 1 and 2, as seen in FIG. 4.
  • the separating web 20 divides the main suction channel 50 into two suction chambers 30 which are symmetrical to one another. 30 '.
  • the separating web 20 extends from the disk outlet opening 70 located in the rear part of FIG. 4 to just before the suction connection 40.
  • the conclusion of the separating web 20 forms a symmetrical taper 25, which serves for flow separation.
  • the separating web 20 tapers on the basis of its separating web thickness TD shown in FIG. 3.

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 angulaire (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 au moins par endroits les deux faces d'une meule tronçonneuse (220) circulaire, et un raccord d'aspiration (40) permettant d'aspirer la matière (S), enlevée du substrat, hors du corps de collecteur (10), un canal d'aspiration principal (50) relié au raccord d'aspiration (40) et s'étendant tangentiellement à la meule tronçonneuse (220), étant formé dans le corps de collecteur (10), ledit canal d'aspiration principal (50) présentant un élément séparateur (20) qui divise le canal d'aspiration principal (50) en deux chambres d'aspiration (30, 30').
EP17800894.2A 2016-12-06 2017-11-22 Collecteur de poussière pour une meuleuse angulaire Active EP3551377B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16202359.2A EP3332907A1 (fr) 2016-12-06 2016-12-06 Capot anti-poussière pour une tronçonneuse
PCT/EP2017/080077 WO2018104057A1 (fr) 2016-12-06 2017-11-22 Collecteur de poussière pour une meuleuse angulaire

Publications (2)

Publication Number Publication Date
EP3551377A1 true EP3551377A1 (fr) 2019-10-16
EP3551377B1 EP3551377B1 (fr) 2022-07-06

Family

ID=57544226

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16202359.2A Withdrawn EP3332907A1 (fr) 2016-12-06 2016-12-06 Capot anti-poussière pour une tronçonneuse
EP17800894.2A Active EP3551377B1 (fr) 2016-12-06 2017-11-22 Collecteur de poussière pour une meuleuse angulaire

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16202359.2A Withdrawn EP3332907A1 (fr) 2016-12-06 2016-12-06 Capot anti-poussière pour une tronçonneuse

Country Status (2)

Country Link
EP (2) EP3332907A1 (fr)
WO (1) WO2018104057A1 (fr)

Families Citing this family (1)

* 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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3444116A1 (de) * 1984-12-04 1986-06-05 Ralf 4630 Bochum Biedron Hand-trennschleifmaschine mit staubabsaugung
DE102013221566B4 (de) * 2013-10-23 2022-06-02 Metabowerke Gmbh Zweiteilige Schutzhaube für Trennschleifer
DE202015006749U1 (de) * 2015-09-26 2015-11-09 Ralf Biedron Zweikanal Saugstutzen für Universal Absaughaube

Also Published As

Publication number Publication date
EP3332907A1 (fr) 2018-06-13
EP3551377B1 (fr) 2022-07-06
WO2018104057A1 (fr) 2018-06-14

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