EP3551377A1 - Staubhaube für einen trennschleifer - Google Patents
Staubhaube für einen trennschleiferInfo
- 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
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 44
- 239000000428 dust Substances 0.000 title claims abstract description 40
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16202359.2A EP3332907A1 (de) | 2016-12-06 | 2016-12-06 | Staubhaube für einen trennschleifer |
PCT/EP2017/080077 WO2018104057A1 (de) | 2016-12-06 | 2017-11-22 | Staubhaube für einen trennschleifer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3551377A1 true EP3551377A1 (de) | 2019-10-16 |
EP3551377B1 EP3551377B1 (de) | 2022-07-06 |
Family
ID=57544226
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16202359.2A Withdrawn EP3332907A1 (de) | 2016-12-06 | 2016-12-06 | Staubhaube für einen trennschleifer |
EP17800894.2A Active EP3551377B1 (de) | 2016-12-06 | 2017-11-22 | Staubhaube für einen trennschleifer |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16202359.2A Withdrawn EP3332907A1 (de) | 2016-12-06 | 2016-12-06 | Staubhaube für einen trennschleifer |
Country Status (2)
Country | Link |
---|---|
EP (2) | EP3332907A1 (de) |
WO (1) | WO2018104057A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3736086A1 (de) * | 2019-05-07 | 2020-11-11 | Hilti Aktiengesellschaft | Staubhaubenvorrichtung für ein werkzeuggerät, sowie seine verwendung und ein verfahren zur stauberfassung |
Family Cites Families (3)
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 |
-
2016
- 2016-12-06 EP EP16202359.2A patent/EP3332907A1/de not_active Withdrawn
-
2017
- 2017-11-22 EP EP17800894.2A patent/EP3551377B1/de active Active
- 2017-11-22 WO PCT/EP2017/080077 patent/WO2018104057A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
EP3551377B1 (de) | 2022-07-06 |
WO2018104057A1 (de) | 2018-06-14 |
EP3332907A1 (de) | 2018-06-13 |
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