DE3500371A1 - Portable electric circular saw - Google Patents

Portable electric circular saw

Info

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
Application number
DE19853500371
Other languages
German (de)
Other versions
DE3500371C2 (en
Inventor
Michael 7000 Stuttgart Beuthner
Michael Ing.(grad.) 7065 Winterbach Fuchs
Hubert Dipl.-Ing. 6232 Bad Soden Ochs
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.)
Techtronic Industries GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19853500371 priority Critical patent/DE3500371A1/en
Publication of DE3500371A1 publication Critical patent/DE3500371A1/en
Application granted granted Critical
Publication of DE3500371C2 publication Critical patent/DE3500371C2/de
Granted legal-status Critical Current

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

The subject matter of the invention is a portable electric circular saw with chip-breaker ribs arranged in the saw housing, a chip-discharge opening, which is made in the saw housing and into which the chips pass due to the air flow produced by the fan of the drive motor, and also a swing guard, which is rotatably mounted on the boss of the saw housing and is under the action of a restoring spring, and a splitting wedge. The object of the invention is to improve the removal of the chips accumulating during the sawing towards the chip-discharge opening. This object is achieved according to the invention in that the swing guard (18) is provided with air-passage openings (20) in its wall (19) situated on the motor side, which air-passage openings (20) clear the air-flow path from the motor fan (13) to the saw blade (9) when the swing guard is in the sawing position. <IMAGE>

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)

Patentansprüche 1. 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, dadurch gekennzeichnet, daß die Pendelschutzhaube (18) in ihrer motorseitig gelegenen Wandung (19) mit Luftdurchtrittsöffnungen (20) versehen ist, die bei in Sägestellung befindlicher Pendelschutzhaube den Luftströmungsweg vom Motorlüfter (13) zum Sägeblatt (9) freigeben. Claims 1. Portable electric circular saw with in the saw housing arranged chip guiding ribs and a chip ejection opening in the saw housing, in which the chips are deposited by the air flow generated by the fan of the drive motor get, as well as with a rotatably mounted on the hub of the saw housing, under the action of a return spring and a pendulum protection hood and a riving knife, characterized in that the pendulum protection hood (18) is located on the engine side Wall (19) is provided with air passage openings (20) which are in the sawing position The pendulum protection hood located in the center of the air flow path from the motor fan (13) to the saw blade (9) release. 2. Handkreissäge nach Anspruch 1, dadurch gekennzeichnet, daß die Luftdurchtrittsöffnungen in der Pendelschutzhaube als radial verlaufende Langlöcher ausgebildet sind.2. Hand circular saw according to claim 1, characterized in that the Air passage openings in the pendulum protection hood as radial elongated holes are trained. 3. Handkreissäge nach Anspruch 1, dadurch gekennzeichnet, daß die Luftdurchtrittsöffnungen in der Pendelschutzhaube als konzentrisch zueinander liegende Langlöcher ausgebildet sind.3. Hand circular saw according to claim 1, characterized in that the Air passage openings in the pendulum protection hood as concentric to one another Long holes are formed. 4. Handkreissäge nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die für den Spaltkeil erforderliche Ausnehmung (23) in der Pendelschutzhaube sich nach außen konisch verjüngende Begrenzungswandungen (21,21') aufweist.4. Hand circular saw according to one of the preceding claims, characterized characterized in that the recess (23) required for the riving knife in the pendulum protection hood has boundary walls (21, 21 ') which taper conically towards the outside.
DE19853500371 1985-01-08 1985-01-08 Portable electric circular saw Granted DE3500371A1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010038676A1 (en) * 2010-07-30 2012-02-02 Hilti Aktiengesellschaft circular saw

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NICHTS ERMITTELT *

Cited By (19)

* Cited by examiner, † Cited by third party
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