EP3551377B1 - Collecteur de poussière pour une meuleuse angulaire - Google Patents

Collecteur de poussière pour une meuleuse angulaire Download PDF

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Publication number
EP3551377B1
EP3551377B1 EP17800894.2A EP17800894A EP3551377B1 EP 3551377 B1 EP3551377 B1 EP 3551377B1 EP 17800894 A EP17800894 A EP 17800894A EP 3551377 B1 EP3551377 B1 EP 3551377B1
Authority
EP
European Patent Office
Prior art keywords
cut
wheel
dust hood
hood
separating bar
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
EP17800894.2A
Other languages
German (de)
English (en)
Other versions
EP3551377A1 (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

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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

Definitions

  • the present invention relates to a dust hood for a cut-off machine equipped with a gear neck for fastening the dust hood.
  • the cut-off machine is equipped with a hood body for at least partially covering a circular cutting disc on both sides, and with a suction connection via which any subsoil that has been removed can be sucked out of the hood body.
  • a main suction channel connected to the suction connection and extending tangentially to the cutting disk is formed in 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.
  • the main suction duct has a separating web which divides the main suction duct into two suction chambers, the separating web lying in a disc plane of the cutting disc when the dust hood is attached to the cut-off machine and the cut-off machine has a cutting disc.
  • the invention includes the finding that dust hoods of the prior art already have a comparatively good suction behavior, but a further increase in the suction quality and thus a further reduced exposure to dust for the user is desirable.
  • the separating web provided according to the invention in the main suction channel which divides the main suction channel into two suction chambers, leads to such an improvement. More precisely, an improvement in the inflow situation of air in the inlet area of the suction system, to which the main suction channel belongs, is achieved. That benefit is coming particularly important in the case of disc-shaped symmetrical tools, such as circular cut-off wheels.
  • the separating web provided according to the invention creates a guide element that decisively improves the disadvantageous flow situation described at the outset. This is because there is a targeted deflection of the air to be extracted, together with the removal of the subsoil, into the two suction chambers created by the separating web in the main suction channel. As a result, subsoil erosion is recorded with significantly less turbulence and, in particular, a central flow collision is avoided.
  • the two suction chambers are designed symmetrically to one another.
  • the separating web lies in a disk plane of the separating 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 cut-off machine.
  • hood body is embodied symmetrically in relation to a section along the plane of the pane.
  • the circular separating disk and/or the separating web can be arranged centrally within the preferably symmetrical hood body.
  • the separating web can have a tapering point in the direction of the suction connection.
  • This tapering is preferably designed symmetrically, that is to say it is effective in both suction chambers. A particularly good flow detachment from the separating web in the direction of the suction connection, which is preferably designed in the form of a sleeve, is thus achieved.
  • a separating web thickness of the separating web is at most 20% greater than a disk thickness of the cutting disk to be accommodated.
  • the separating web thickness or the disc thickness relate to the respective extension along the axis of rotation.
  • the separating web thickness of the separating web can essentially be the same as the disk thickness of the cutting disk to be accommodated, with the exception of a tapering of the separating web thickness in the area of a possibly provided tapering of the separating web.
  • a disc outlet opening is to be understood as meaning such an opening in the hood body from which the circular cutting disc, which is otherwise covered on both sides, protrudes.
  • the disc exit opening can define a contact surface of the dust hood, which in full section rests essentially completely on the ground.
  • the separating web extends to the end of the separating disk, in particular starting from a disk outlet opening of the hood body and/or in the tangential direction along the disk diameter.
  • This extension can be understood as the total length of the hood body (without the main suction channel and suction connection).
  • the object is also achieved by a 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.
  • the cut-off grinder is equipped with a circular cutting disk, with a separating web thickness of the separating web preferably being at most 20% greater than a disk thickness of the cutting disk.
  • the separating web can cling to the circular separating disk as it runs along the main suction channel.
  • 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 100 according to the invention in an external view.
  • the dust hood 100 is designed for connection to a cut-off machine 200, which is 1 is shown only schematically.
  • the cut-off grinder is preferably an angle grinder.
  • the dust hood 100 is arranged on the rear of a gear neck 210 of the angle grinder 200 .
  • the dust hood 100 of 1 has a hood body 10 for at least partially covering a circular cutting disk 220 on both sides.
  • the cutting wheel 220 is connected to a drive spindle 230 of the cut-off grinder 200 in a rotationally fixed manner. During cutting operation, the cutting disk 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 cutting disk 220 protrudes from the hood body 10.
  • the dust hood 100 is equipped with a suction connection 40, via which a substrate removal S (e.g. dust) can be sucked out of the hood body 10.
  • a main suction channel 50 connected to the suction connection 40 and extending in the tangential direction T along the cutting disk 220 is formed in the hood body 10 .
  • Drawn in 1 is a section line AA through the main suction channel 50. This is to illustrate the separating web 20 provided according to the invention, which consists of 2 becomes evident.
  • FIG 2 shows a rear side of the embodiment of FIG 1 , wherein the main suction channel 50 along the in 1 illustrated cutting line AA is cut open.
  • the angle grinder 200 is in 2 not shown.
  • 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 formed symmetrically to each other, wherein the separating web 20 is in a disc plane SE of the cutting disc 220.
  • the surface normal of the disk plane SE runs parallel to the axis of rotation R of the cutting disk 220.
  • the main suction channel 50 and correspondingly the suction chambers 30, 30' defined by the separating web 20 in the tangential direction T to the Blade 220 extend.
  • the separating web 20 extends in the tangential direction T up to the window exit opening 70 of the hood body.
  • the separating web 20 continues to extend, starting from the disk outlet opening 70 of the hood body 10 and in the tangential direction T to the end of the separating disk 220.
  • the separating web has a length that is at least as great 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 tapering 25, which serves to detach the flow of the suction air AL.
  • FIG 3 now shows a view of the main suction duct 50 from below in the direction of view BU.
  • the separating web 20 extends in the tangential direction T up to the disk exit opening 70.
  • the separating web 20 ends flush with the disk exit opening 70.
  • a separating web thickness TD of the separating web 20 is at most 20 percent greater than a disc thickness SD of the cutting disc 220 accommodated.
  • the separating web 20 hugs the circular separating disk 220 as it runs along the main suction channel 50, a gap of at most 5 mm remaining between the separating web 20 and the separating disk 220 in the radial direction RR.
  • the separating disk 220 is "framed" by the separating web 20 lying in the disk plane SE, at least in the area of the main suction channel 50 .
  • FIG. 12 shows a section of the preferred exemplary embodiment of the dust hood, viewed from above in the direction BO 1 and 2 . Again 4 can be removed, the separating web 20 divides the main suction channel 50 into two symmetrical suction chambers 30, 30'.
  • the separating web 20 is in the rear part of the 4 disc outlet opening 70 located in the window extends to just before the suction connection 40 .
  • the end of the separating web 20 is formed by a symmetrical tapering 25, which serves to separate the flow. In the area of the point 25, the separating web 20 tapers, starting from its in 3 shown separator thickness TD.

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 (10)

  1. Collecteur de poussière (100) destiné à une tronçonneuse à meule (200) équipée d'un prolongement de carter (210) servant à fixer le collecteur de poussière (100), comprenant un corps de collecteur (10) servant au recouvrement bilatéral au moins par endroits d'une meule de tronçonnage circulaire (220) de la tronçonneuse à meule (200), et un raccord d'aspiration (40) par l'intermédiaire duquel la matière enlevée du substrat (S) peut être aspirée hors du corps de collecteur (10), dans lequel, dans le corps de collecteur (10), un canal d'aspiration principal (50) relié au raccord d'aspiration (40) est réalisé qui s'étend de manière tangentielle par rapport à la meule de tronçonnage (220), le canal d'aspiration principal (50) présentant un séparateur (20) qui divise le canal d'aspiration principal (50) en deux chambres d'aspiration (30, 30'),
    caractérisé en ce que le séparateur (20) se situe dans le plan de meule (SE) de la meule de tronçonnage (220) lorsque le collecteur de poussière (100) est fixé à la tronçonneuse à meule (200) et la tronçonneuse à meule (200) présente une meule de tronçonnage (220).
  2. Collecteur de poussière (100) selon la revendication 1, caractérisé en ce que les deux chambres d'aspiration (30, 30') sont réalisées de manière symétrique l'une par rapport à l'autre.
  3. Collecteur de poussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce que le séparateur (20) présente un effilement (25) en direction du raccord d'aspiration (40).
  4. Collecteur de poussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur de séparateur (TD) du séparateur (20) est au maximum supérieure de 20 pour cent à une épaisseur de meule (SD) de la meule de tronçonnage (220) à recevoir.
  5. Collecteur de poussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce que le séparateur (20) atteint dans la direction tangentielle (T) une ouverture de sortie de meule (70) du corps de collecteur (10).
  6. Collecteur de poussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce que le séparateur (20) s'étend en partant d'une ouverture de sortie de meule (70) du corps de collecteur (10) et dans la direction tangentielle (T) le long du diamètre de meule jusqu'à l'extrémité de la meule de tronçonnage (220).
  7. Collecteur de poussière (100) selon l'une quelconque des revendications précédentes, caractérisé en ce que le séparateur (20) épouse la meule de tronçonnage (220) circulaire dans son extension le long du canal d'aspiration principal (50).
  8. Tronçonneuse à meule (200) pourvue d'un prolongement de carter (210) et d'un collecteur de poussière (100) selon l'une quelconque des revendications précédentes, dans laquelle le collecteur de poussière (100) est disposé ou est destiné à être disposé sur le prolongement de carter (210).
  9. Tronçonneuse à meule (200) selon la revendication 8, comprenant une meule de tronçonnage circulaire (220), dans laquelle une épaisseur de séparateur (TD) du séparateur (20) est au maximum supérieure de 20 pour cent à une épaisseur de meule (SD) de la meule de tronçonnage (220).
  10. Tronçonneuse à meule (200) selon la revendication 8 ou 9, dans laquelle le séparateur (20) épouse la meule de tronçonnage (220) circulaire sur son extension le long du canal d'aspiration principal (50), et il reste un intervalle (2) d'un maximum de 5 mm, de préférence d'un maximum de 3 mm, dans la direction radiale (RR) entre le séparateur (20) et la meule de tronçonnage (220).
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 EP3551377A1 (fr) 2019-10-16
EP3551377B1 true 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
WO2018104057A1 (fr) 2018-06-14
EP3551377A1 (fr) 2019-10-16

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