DE3500371A1 - Portable electric circular saw - Google Patents
Portable electric circular sawInfo
- Publication number
- DE3500371A1 DE3500371A1 DE19853500371 DE3500371A DE3500371A1 DE 3500371 A1 DE3500371 A1 DE 3500371A1 DE 19853500371 DE19853500371 DE 19853500371 DE 3500371 A DE3500371 A DE 3500371A DE 3500371 A1 DE3500371 A1 DE 3500371A1
- Authority
- DE
- Germany
- Prior art keywords
- saw
- protection hood
- circular saw
- passage openings
- air
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0042—Devices for removing chips
- B23Q11/0046—Devices for removing chips by sucking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D59/00—Accessories specially designed for sawing machines or sawing devices
- B23D59/006—Accessories specially designed for sawing machines or sawing devices for removing or collecting chips
Abstract
Description
Tragbare elektrische Handkreissäge Portable electric circular saw
Die Erfindung bezieht sich auf eine tragbare elektrische Handkreissäge mit im Sägengehäuse angeordneten Spanleitrippen und einer im Sägengehäuse angebrachten Spanauswurföffnung, in welche die Späne durch den vom Lüfter des Antriebsmotors erzeugten Luftstrom gelangen, sowie mit einer auf der Nabe des Sägengehäuses drehbar gelagerten, unter der Wirkung einer Rückstellfeder stehenden Pendelschutzhaube und einem Spaltkeil.The invention relates to a portable electric hand-held circular saw with chip guide ribs arranged in the saw housing and one in the saw housing Chip ejection opening into which the chips are blown by the fan of the drive motor generated air flow arrive, as well as with a rotatable on the hub of the saw housing mounted pendulum protection hood under the action of a return spring and a riving knife.
Bei bekannten Handkreissägen dieser Art wird während des Sägebetriebs der vom Lüfter des Antriebsmotors erzeugte, in das Innere des Sägengehäuses geblasene Teilstrom der Motorkühlluft durch die motorseitig liegende Wandung der Pendelschutzhaube vom Sägeblatt ferngehalten, da sich die Pendelschutzhaube beim Sägevorgang im Innern des Sägengehäuses befindet.In known hand-held circular saws of this type, during the sawing operation the one generated by the fan of the drive motor and blown into the interior of the saw housing Partial flow of the engine cooling air through the wall of the pendulum protection hood on the engine side kept away from the saw blade, as the pendulum guard is inside during the sawing process of the saw housing.
Es ist Aufgabe der Erfindung, die Abfuhr der beim Sägen anfallenden Späne hin zur Spanauswurföffnung zu verbessern.It is the object of the invention to remove the resulting from sawing Improve chips towards the chip ejection opening.
Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß die Pendelschutzhaube in ihrer motorseitig gelegenen Wandung mit Luftdurchtrittsöffnungen versehen ist, die bei in Sägestellung befindlicher Pendelschutzhaube den Luftströmungsweg vom Motorlüfter zum Sägeblatt freigeben.This object is achieved according to the invention in that the pendulum protection hood is provided with air passage openings in the wall on the motor side, when the pendulum guard is in the sawing position, the air flow path from Release the motor fan for the saw blade.
Zweckmäßige Ausges-taltungen der Erfindung sind in den Unteransprüchen angegeben.Appropriate refinements of the invention are set out in the subclaims specified.
Die Erfindung wird im nachstehenden anhand der Zeichnung, die ein Ausführungsbeispiel schematisch veranschaulicht, ~erläutert.The invention is in the following with reference to the drawing, which a Exemplary embodiment illustrated schematically, ~ explained.
Es zeigen: ' Fig.1 einen Schnitt durch den sägeblattseitigen Teil einer elektrischen Handkreissäge, Fig.2 eine Ansicht längs des Schnittes A-B durch Fig. 1 bei in Sägelage befindlicher Pendelschutzhaube, Fig.3 eine Ansicht entlag des Schnittes C-D durch die Pendelschutzhaube gemaß Fig. 2.The figures show: FIG. 1 a section through the part on the saw blade side an electric circular saw, Figure 2 is a view along the section A-B through Fig. 1 with the pendulum guard in the sawing position, Fig. 3 entlag a view of section C-D through the pendulum protection hood according to Fig. 2.
Wie Fig. 1 zeigt, ist die vom Ritzel 1 der Ankerwelle 2 des nicht gezeichneten, im Raum 3 liegenden Antriebsmotors über ein Zahnrad 4 angetriebene Arbeitsspindel 5 mittels eines Kugellagers 6 drehbar in der Nabe 7 des Sägengehäuses 8 gelagert. Das Sägeblatt 9 ist durch einen unverdrehbar (2-Kant) auf der Arbeitsspindel 5 sitzenden Spannflansch 10 und einer Schraube 11 mit dem lose auf der Arbeitsspindel befindlichen Aufnahmeflansch 12 reibschlüssig verbunden.As Fig. 1 shows, the pinion 1 of the armature shaft 2 is not drawn, located in space 3 drive motor driven by a gear 4 Work spindle 5 rotatable by means of a ball bearing 6 in the hub 7 of the saw housing 8 stored. The saw blade 9 cannot be rotated (2-point) on the work spindle 5 seated clamping flange 10 and a screw 11 with the loose on the work spindle located receiving flange 12 frictionally connected.
Ein Teil der vom auf der Ankerwelle 2 des Antriebsmotors angebrachten Lüfter 13 erzeugten Kühlluftstroms 14 gelangt durch die öffnung 15 in die Wandung des Sägengehäuses in dessen Innenraum und bläst die beim Sägen anfallenden Späne bzw. den: Sägestaub entlang der Spanleitrippen 16 zur Spanaustrittsöffnung 17, an die ein nicht dargestelltes Spanauffangbehältnis anschließbar ist.A part of the mounted on the armature shaft 2 of the drive motor The cooling air flow 14 generated by the fan 13 passes through the opening 15 into the wall of the saw housing in its interior and blows the chips that occur during sawing or the: sawdust along the chip guide ribs 16 to the chip outlet opening 17 which can be connected to a chip collecting container (not shown).
Damit der Kühlluftteilstrom beim Sägevorgang, bei welchem sich die hm die Nabe 7 des Sägengehäuses verschwenkbare Pendelschutzhaube 18 weitgehend im Innern des Sägengehäuses befindet, zum Sägeblatt 9 gelangen kann, weist die Pendelschutzhaube in ihrer motorseitig gelegenen Wandung 19 eine Anzahl Luftdurchtrittsöffnungen 20 auf, die als radial zueinander verlaufende oder konzentrisch zueinanderliegende Langlöcher oder sonstwie ausgebildet sein können (siehe Fig. 2).So that the partial flow of cooling air during the sawing process, in which the hm the hub 7 of the saw housing pivotable pendulum guard 18 largely in the Located inside the saw housing, can get to the saw blade 9, has the pendulum guard a number of air passage openings 20 in its wall 19 on the motor side on, which run radially to one another or are concentric to one another Elongated holes or otherwise can be formed (see Fig. 2).
Wie insbesondere auch aus Fig. 2 ersichtlich ist, trifft der durch die Luftdurchtrittsöffnungen 20 hindurchströmende Anteil des Kühlluftstroms unmittelbar auf das rotierende Sägebla#tt 9 auf und wird von diesem in. Richtung zur Spanauswurföffnung 17 hin umgelenkt.As can be seen in particular from FIG. 2, it passes through the portion of the cooling air flow flowing through the air passage openings 20 directly on the rotating saw blade 9 and is moved by this in the direction of the chip ejection opening 17 redirected.
Die um das Sägeblatt wirbelnde Luft bewirkt zusammen mit der zugeführten Motorkühlluft eine verbesserte Abfuhr der Sägespäne sowie des Sägestaubs zur Spanauswurföffnung hin.The air swirling around the saw blade, together with the air supplied Motor cooling air improves the removal of sawdust and sawdust to the chip ejection opening there.
Wie die Fig. 3 zeigt, sind die beiden Begrenzungswandungen 21,21' der für den Spaltkeil 22 erforderlichen Ausnehmung 23 der Pendelschutzhaube 18 im in Fig. 2 dargestellten Bereich 24 nach innen gezogen, so daß ein sich düsenartig nach außen verjüngender Spalt entsteht.As Fig. 3 shows, the two boundary walls 21,21 ' the recess 23 of the pendulum protection hood 18 required for the riving knife 22 in the In Fig. 2 shown area 24 drawn inward, so that a nozzle-like outwardly tapering gap is created.
Dadurch wird erreicht, daß die Späne in ihrer Flugrichtung nicht plötzlich abgebremst, sondern zum Spalt hin abgelenkt werden.This ensures that the chips do not suddenly move in their direction of flight decelerated, but deflected towards the gap.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853500371 DE3500371A1 (en) | 1985-01-08 | 1985-01-08 | Portable electric circular saw |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853500371 DE3500371A1 (en) | 1985-01-08 | 1985-01-08 | Portable electric circular saw |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3500371A1 true DE3500371A1 (en) | 1986-07-10 |
DE3500371C2 DE3500371C2 (en) | 1988-12-01 |
Family
ID=6259407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19853500371 Granted DE3500371A1 (en) | 1985-01-08 | 1985-01-08 | Portable electric circular saw |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3500371A1 (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3525092A1 (en) * | 1985-07-13 | 1987-01-22 | Festo Kg | Especially portable severing device, such as a hand-held circular saw, abrasive cutting device or the like |
WO1990006832A1 (en) * | 1988-12-22 | 1990-06-28 | Robert Bosch Gmbh | Hand circular saw |
US5199343A (en) * | 1991-10-09 | 1993-04-06 | Black & Decker Inc. | Power saw with louvered blade guard |
US5634274A (en) * | 1995-04-14 | 1997-06-03 | Makita Corporation | Ventilating device in power driven tool |
US5701676A (en) * | 1995-05-09 | 1997-12-30 | Makita Corporation | Portable rotary saw |
US6009782A (en) * | 1997-06-19 | 2000-01-04 | Makita Corporation | Table saw |
DE10036458B4 (en) * | 1999-07-30 | 2004-03-25 | S-B Power Tool Co., Chicago | Dust collector for a circular saw |
DE10349088A1 (en) * | 2002-10-22 | 2004-09-09 | Hitachi Koki Co., Ltd. | Portable electric cutting device for cutting e.g. timber includes groove provided to bottom surface of base and which extends forward in the cutting direction from a front end of the opening to base front end |
US7103979B2 (en) | 2001-04-20 | 2006-09-12 | Hitachi Koki Co., Ltd. | Portable electric cutting device with blower mechanism |
US7926398B2 (en) | 2002-06-19 | 2011-04-19 | Black & Decker Inc. | Cutter with optical alignment system |
US8726773B2 (en) | 2010-10-19 | 2014-05-20 | Robert Bosch Gmbh | Table saw having airflow apparatus |
DE102013216497A1 (en) * | 2013-08-20 | 2015-02-26 | Weber Maschinenbau Gmbh Breidenbach | Knife protection cover |
DE102009060088B4 (en) * | 2008-12-26 | 2017-02-09 | Hitachi Koki Co., Ltd. | Handkreissäge |
EP3659764A1 (en) * | 2018-11-28 | 2020-06-03 | Black & Decker Inc. | Power tool debris management |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010038676A1 (en) | 2010-07-30 | 2012-02-02 | Hilti Aktiengesellschaft | circular saw |
-
1985
- 1985-01-08 DE DE19853500371 patent/DE3500371A1/en active Granted
Non-Patent Citations (1)
Title |
---|
NICHTS ERMITTELT * |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3525092A1 (en) * | 1985-07-13 | 1987-01-22 | Festo Kg | Especially portable severing device, such as a hand-held circular saw, abrasive cutting device or the like |
WO1990006832A1 (en) * | 1988-12-22 | 1990-06-28 | Robert Bosch Gmbh | Hand circular saw |
US5199343A (en) * | 1991-10-09 | 1993-04-06 | Black & Decker Inc. | Power saw with louvered blade guard |
US5634274A (en) * | 1995-04-14 | 1997-06-03 | Makita Corporation | Ventilating device in power driven tool |
US5701676A (en) * | 1995-05-09 | 1997-12-30 | Makita Corporation | Portable rotary saw |
US6009782A (en) * | 1997-06-19 | 2000-01-04 | Makita Corporation | Table saw |
DE19825741B4 (en) * | 1997-06-19 | 2012-12-20 | Makita Corp. | table saw |
DE10036458B4 (en) * | 1999-07-30 | 2004-03-25 | S-B Power Tool Co., Chicago | Dust collector for a circular saw |
DE10036458B8 (en) * | 1999-07-30 | 2004-09-02 | S-B Power Tool Co., Chicago | Dust collector for a circular saw |
US7103979B2 (en) | 2001-04-20 | 2006-09-12 | Hitachi Koki Co., Ltd. | Portable electric cutting device with blower mechanism |
US7926398B2 (en) | 2002-06-19 | 2011-04-19 | Black & Decker Inc. | Cutter with optical alignment system |
US7516553B2 (en) | 2002-10-22 | 2009-04-14 | Hitachi Koki Co., Ltd. | Portable electric cutting device with blower mechanism |
US7219435B2 (en) | 2002-10-22 | 2007-05-22 | Hitachi Koki Co., Ltd. | Portable electric cutting device with blower mechanism |
DE10349088A1 (en) * | 2002-10-22 | 2004-09-09 | Hitachi Koki Co., Ltd. | Portable electric cutting device for cutting e.g. timber includes groove provided to bottom surface of base and which extends forward in the cutting direction from a front end of the opening to base front end |
DE102009060088B4 (en) * | 2008-12-26 | 2017-02-09 | Hitachi Koki Co., Ltd. | Handkreissäge |
US8726773B2 (en) | 2010-10-19 | 2014-05-20 | Robert Bosch Gmbh | Table saw having airflow apparatus |
DE102013216497A1 (en) * | 2013-08-20 | 2015-02-26 | Weber Maschinenbau Gmbh Breidenbach | Knife protection cover |
EP3659764A1 (en) * | 2018-11-28 | 2020-06-03 | Black & Decker Inc. | Power tool debris management |
US11440220B2 (en) | 2018-11-28 | 2022-09-13 | Black & Decker, Inc. | Replacement of rotatable cutting discs of a power tool |
Also Published As
Publication number | Publication date |
---|---|
DE3500371C2 (en) | 1988-12-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8363 | Opposition against the patent | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: ATLAS COPCO ELEKTROWERKZEUGE GMBH, 7057 WINNENDEN, |
|
8365 | Fully valid after opposition proceedings | ||
8339 | Ceased/non-payment of the annual fee |