DE3500372A1 - Element for locking the drive spindle for the saw blade of a portable circular saw - Google Patents

Element for locking the drive spindle for the saw blade of a portable circular saw

Info

Publication number
DE3500372A1
DE3500372A1 DE19853500372 DE3500372A DE3500372A1 DE 3500372 A1 DE3500372 A1 DE 3500372A1 DE 19853500372 DE19853500372 DE 19853500372 DE 3500372 A DE3500372 A DE 3500372A DE 3500372 A1 DE3500372 A1 DE 3500372A1
Authority
DE
Germany
Prior art keywords
locking
saw
portable circular
drive spindle
saw blade
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
DE19853500372
Other languages
German (de)
Other versions
DE3500372C2 (en
Inventor
Erich Ing.(grad.) 7062 Rudersberg Ade
Michael 7000 Stuttgart Beuthner
Otto 7310 Deizisau Maier
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 DE19853500372 priority Critical patent/DE3500372A1/en
Publication of DE3500372A1 publication Critical patent/DE3500372A1/en
Application granted granted Critical
Publication of DE3500372C2 publication Critical patent/DE3500372C2/de
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q11/00Accessories 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
    • B23Q11/0078Safety devices protecting the operator, e.g. against accident or noise
    • B23Q11/0092Safety devices protecting the operator, e.g. against accident or noise actuating braking or stopping means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/005Auxiliary devices used in connection with portable grinding machines, e.g. holders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29Details; Component parts; Accessories
    • B27B5/38Devices for braking the circular saw blade or the saw spindle; Devices for damping vibrations of the circular saw blade, e.g. silencing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Abstract

The invention relates to an element for locking the drive spindle for the saw blade of a portable circular saw, which element can be engaged in recesses of the drive gearwheel against the force of a restoring spring. The object of the invention is to improve an element of this type in such a way that it is inexpensive to manufacture, is simple to assemble and can be readily used even in those portable circular saws whose guard part situated on the motor side forms a one-piece unit with the gearbox. This object is achieved according to the invention in that the element consists of a tongue (2) which is provided with a bevel (5) on its gearwheel-side end face and is injected in a cylindrical plastic guide body (4) which contains a window-shaped recess (9) running in the axial direction for the engagement of a stop screw (10) and is conically tapered at its actuating-side end. <IMAGE>

Description

Element zum Arretieren der Antriebsspindel für das Säge- Element for locking the drive spindle for the saw

blatt einer Handkreissäge Gegenstandder Erfindung ist ein Element zum Arretieren der Antriebsspindel für das Sägeblatt einer Handkreissäge, das gegen die Kraft einer Rückstellfeder in Ausnehmungen des Spindelzahnrads einrückbar -ist. Blade of a portable circular saw The invention relates to an element to lock the drive spindle for the saw blade of a circular saw, which against the force of a return spring can be engaged in recesses in the spindle gear.

Zum Arretieren der Schleifspind~l von Winkelschleifern sind Arretierelemente bekannt, die als zylindrische, unter der Wirkung einer Rückstellfeder stehende und mit einem Betätigungsknopf versehene Bolzen ausgebildet sind, die in Ausnehmungen eines auf der Schleifspindel angeordneten Kegelzahnrads einrückbar sind (DE-PS 30 18 775).Locking elements are used to lock the grinding spindles on angle grinders known as the cylindrical, under the action of a return spring and provided with an actuating button bolts are formed, which are in recesses a bevel gear arranged on the grinding spindle can be engaged (DE-PS 30 18 775).

Derartige Arretierelemente sind bei Handkreissägen aus Konstruktions- und Montagegründen oh-ne zusätzlichen und erheblichen Mehraufwand nur dann einsetzbar, wenn die Schutzhaube bzw. der motorseitige Schutzhaubenteil und das Getriebegehäuse zwei separate Teile bilden; weil in diesem Fall die Trennfuge die Montage eines Arretierelements bekannter Ausführung ohne Schwierigkeiten ermöglicht.Such locking elements are used in circular saws from construction and assembly reasons without additional and considerable additional effort can only be used if the protective hood or the protective hood part on the motor side and the gearbox housing form two separate parts; because in this case the parting line requires the assembly of a Locking element of known design allows without difficulty.

Es ist Aufgabe der Erfindung, ein Element zum Arretieren der Antriebsspindel für das Sägeblatt einer Handkreissäge zu schaffen, das kostengünstig herstellbar, einfach montierbar und ohne weiteres auch bei Handkreissägen ve#rwendbar ist, deren motorseitig gelegener Schutzhaubenteil mit dem Getriebegehäuse eine einstückige Einheitbildet.It is the object of the invention to provide an element for locking the drive spindle to create for the saw blade of a circular saw that is inexpensive to manufacture, is easy to assemble and can also be used with hand-held circular saws without further ado, whose The protective cover part located on the motor side is a one-piece with the gearbox housing Unity.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß das Arretierelement aus einer an seiner zahnradseitigen Stirnfläche mit einer Abschrägung versehenen Zunge besteht, die in einen zylindrischen Führungskörper aus Kunststoff eingespritzt ist, der eine in axialer Richtung verlaufende fensterförmige Ausnehmung für den Eingriff einer Anschlagschraube enthält und an seinem betätigungsseitigen Ende konisch verjüngt ist.This object is achieved according to the invention in that the locking element from one provided with a bevel on its gear-side face The tongue is injected into a cylindrical guide body made of plastic is, which has a window-shaped recess extending in the axial direction for the Contains engagement of a stop screw and conical at its actuation-side end is rejuvenated.

Ein Ausführungsbeispiel der Erfindung wird im nachstehenden anhand der Zeichnung erläutert.An embodiment of the invention is based on the following the drawing explained.

Es zeigen: Fig. 1 eine. Seitenansicht des Arretierelements in Zuordnung zu dem Antriebszahnrad für die Sägeblattspindel in der Entriegelungslage, Fig. 2 eine Ansicht entsprechend Fig. 1, jedoch mit in der Verriegelungslage befindlichem Arretierelement, Fig. 3 die kollektorseitige Ansicht einer elektrischen Handkreissäge, Fig. 4 einen Längsschnitt durch den Getriebeteil einer Handkreissäge gemäß Fig. 3.They show: FIG. 1 a. Side view of the locking element in association to the drive gear for the saw blade spindle in the unlocked position, FIG. 2 a view corresponding to FIG. 1, but with it in the locked position Locking element, Fig. 3 the collector side view of an electric circular saw, 4 shows a longitudinal section through the gear part of a hand-held circular saw according to FIG. 3.

Wie aus den Figuren 1, 2 und 3 ersichtlich ist, besteht das Arretierelement 1 aus einer Zunge 2 mit rechteckförmigem Querschnitt 3, die beispielswei#se aus gehärtetem Stahlblech hergestellt ist. Die Zunge 2 ist in einem zylindrischen Kunststoff-Führungszyl inder 4 eingespritzt und weist an ihrem arretierseitigen Ende eine Abschrägung 5 auf, die ein Eindrücken des Arretierelements in eine der Ausnehmungen 6 im Antriebszahnrad 7 während des Laufs der Kreissäge verhindert.As can be seen from Figures 1, 2 and 3, there is the locking element 1 from a tongue 2 with a rectangular cross-section 3, the example from hardened steel sheet is made. The tongue 2 is in a cylindrical plastic guide cylinder inder 4 and has a bevel 5 at its locking-side end on which a pressing of the locking element into one of the recesses 6 in the drive gear 7 prevented while the circular saw is running.

Der Führungszylinder 4 steht unter der Wirkung einer Rückstellfeder 8 und ist mit einer fensterförmigen Aussparung 9 versehen, die sich in Achsrichtung des Arretierelements erstreckt.The guide cylinder 4 is under the action of a return spring 8 and is provided with a window-shaped recess 9, which extends in the axial direction of the locking element extends.

In diese Ausnehmung greift eine Schraube 10 oder dergleichen Bauteil ein, die in die Wandung des Getriebegehäuses 11 einschraubbar ist und die obere und untere Endlage 12,13!des Arretierelements festlegt.A screw 10 or a similar component engages in this recess one, which can be screwed into the wall of the gear housing 11 and the upper one and the lower end position 12, 13! of the locking element.

Der aus Kunststoff bestehende Führungszylinder 4 weist eine Ringnut 14 auf, in welche eine Dichtung 15 eingesetzt ist, die einen eventuellen Fettaustritt aus dem Getrieberaum 16 (Fig. .4) verhindert.The guide cylinder 4 made of plastic has an annular groove 14, in which a seal 15 is used to prevent any grease from escaping from the gear space 16 (Fig. .4) prevented.

Die Montage des Arretierelements geschieht wie folgt (verg. hierzu Fig. 3): Die Feder 8 wird auf die Zunge 2 aufgesteckt, die Dichtung 15 über die Einführschräge 17 des Führungszylinders 4 in die Ringn-ut 14 eingebracht und das Arretierelement in die Aufnahmehührung 18 im Bauteil Sägen-Getriebegehäuse eingeführt. Daraufhin wird die Schraube 10 in die ihr zugeordnete Gewindebohrung in der Wandung des Getriebegehäuses 11 eingedreht.The assembly of the locking element is done as follows (cf. Fig. 3): The spring 8 is slipped onto the tongue 2, the seal 15 over the Insertion slope 17 of the guide cylinder 4 introduced into the ring groove 14 and the Locking element inserted into the receiving guide 18 in the saw gear housing component. The screw 10 is then inserted into the threaded hole assigned to it in the wall of the gear housing 11 screwed in.

Wie die Figur 4 erkennen läßt, sind die Ausnehmungen 6 im Antriebszahnrad 7 von der Motorseite her gesehen unmittelbar vor dem Kuqellager 20 für die Antriebsspindel 21 angebracht Das Antriebszahnrad 7 steht mit dem Ritzel 22 der Ankerwelle 23 des nicht dargestellten Antriebsmotors der Handkreissäge im Eingriff und wird durch dieses in Drehung versetzt. Das Getriebegehäuse 11 bildet mit dem Teil 19 der Schutzhaube eine einstückige Einheit.As can be seen from FIG. 4, the recesses 6 are in the drive gear 7 seen from the motor side immediately in front of the ball bearing 20 for the drive spindle 21 attached The drive gear 7 is with the pinion 22 of the armature shaft 23 of the not shown drive motor of the circular saw in engagement and is through this set in rotation. The gear housing 11 forms with part 19 of the protective hood a one-piece unit.

Claims (2)

Patentansprüche 1. Element zum Arretieren der Antriebsspindel für das Sägeblatt einer Handkreissäge, das gegen die Kraft einer Rückstellfeder in Ausnehmungen des Antriebszahnrads einrückbar ist, dadurch gekennzeichnet, daß es aus einer an seiner zahnradseitigen Stirnfläche mit einer Abschrägung ( 5) versehenen Zunge (2 ) besteht, die in einen zylindrischen Führungskörper ( 4 ) aus Kunststoff eingespritzt ist, der eine in axialer Richtung verlaufende fensterförmige Ausnehmung (9 ) für den Eingriff einer Anschlagschraube (10) enthält und an seinem betätigungsseitigen Ende konisch verjüngt ist. Claims 1. Element for locking the drive spindle for the saw blade of a circular saw, which against the force of a return spring in recesses of the drive gear is engageable, characterized in that it consists of a its gear-side face with a bevel (5) provided tongue (2nd ), which is injected into a cylindrical guide body (4) made of plastic is, which has a window-shaped recess (9) extending in the axial direction for contains the engagement of a stop screw (10) and on its actuation side The end is tapered. 2. Element nach Anspruch 1, dadurch gekennzeichnet, daß der zylindrische Führungskörper ( 4) eine Ringnut (14) zur Aufnahme einer Dichtung aufweist.2. Element according to claim 1, characterized in that the cylindrical Guide body (4) has an annular groove (14) for receiving a seal.
DE19853500372 1985-01-08 1985-01-08 Element for locking the drive spindle for the saw blade of a portable circular saw Granted DE3500372A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19853500372 DE3500372A1 (en) 1985-01-08 1985-01-08 Element for locking the drive spindle for the saw blade of a portable circular saw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853500372 DE3500372A1 (en) 1985-01-08 1985-01-08 Element for locking the drive spindle for the saw blade of a portable circular saw

Publications (2)

Publication Number Publication Date
DE3500372A1 true DE3500372A1 (en) 1986-07-10
DE3500372C2 DE3500372C2 (en) 1989-02-16

Family

ID=6259408

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853500372 Granted DE3500372A1 (en) 1985-01-08 1985-01-08 Element for locking the drive spindle for the saw blade of a portable circular saw

Country Status (1)

Country Link
DE (1) DE3500372A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0812657A1 (en) * 1996-06-13 1997-12-17 Atlas Copco Tools Ab Portable power tool
EP2062699A3 (en) * 2007-11-21 2010-03-31 Metabowerke Gmbh Motor-driven hand-held circular saw with rotatable protective hood
CN111360554A (en) * 2020-02-21 2020-07-03 上海交大智邦科技有限公司 Gravity shaft locking device of numerical control machine tool

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018775C2 (en) * 1980-05-16 1982-12-16 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Device for locking the grinding spindle of angle grinders

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018775C2 (en) * 1980-05-16 1982-12-16 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Device for locking the grinding spindle of angle grinders

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0812657A1 (en) * 1996-06-13 1997-12-17 Atlas Copco Tools Ab Portable power tool
JPH1076481A (en) * 1996-06-13 1998-03-24 Atlas Copco Tools Ab Portable type power tool
EP2062699A3 (en) * 2007-11-21 2010-03-31 Metabowerke Gmbh Motor-driven hand-held circular saw with rotatable protective hood
CN111360554A (en) * 2020-02-21 2020-07-03 上海交大智邦科技有限公司 Gravity shaft locking device of numerical control machine tool
CN111360554B (en) * 2020-02-21 2021-01-22 上海交大智邦科技有限公司 Gravity shaft locking device of numerical control machine tool

Also Published As

Publication number Publication date
DE3500372C2 (en) 1989-02-16

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: ATLAS COPCO ELEKTROWERKZEUGE GMBH, 7057 WINNENDEN,

8339 Ceased/non-payment of the annual fee