DE2942169A1 - Lubricant feed for hand-held circular saw - has blade shaft locking bolt connected to piston to reapply lost gear grease each time bolt is engaged - Google Patents

Lubricant feed for hand-held circular saw - has blade shaft locking bolt connected to piston to reapply lost gear grease each time bolt is engaged

Info

Publication number
DE2942169A1
DE2942169A1 DE19792942169 DE2942169A DE2942169A1 DE 2942169 A1 DE2942169 A1 DE 2942169A1 DE 19792942169 DE19792942169 DE 19792942169 DE 2942169 A DE2942169 A DE 2942169A DE 2942169 A1 DE2942169 A1 DE 2942169A1
Authority
DE
Germany
Prior art keywords
piston
locking bolt
engaged
hand
circular saw
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
DE19792942169
Other languages
German (de)
Other versions
DE2942169C2 (en
Inventor
Dipl.-Ing. Erwin 7057 Winnenden Stiltz
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.)
Licentia Patent Verwaltungs 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 DE19792942169 priority Critical patent/DE2942169C2/en
Publication of DE2942169A1 publication Critical patent/DE2942169A1/en
Application granted granted Critical
Publication of DE2942169C2 publication Critical patent/DE2942169C2/en
Expired 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
    • B23Q11/0078—Safety devices protecting the operator, e.g. against accident or noise
    • B23Q11/0092—Safety devices protecting the operator, e.g. against accident or noise actuating braking or stopping means
    • 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
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B23Q16/02—Indexing equipment
    • B23Q16/04—Indexing equipment having intermediate members, e.g. pawls, for locking the relatively movable parts in the indexed position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/38—Devices 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)
  • General Details Of Gearings (AREA)

Abstract

The portable circular saw unit has the saw blade motor-driven via gears (12,4). The saw blade shaft carries a stop disc (3) with peripheral recesses (9) capable of engagement by a spring-loaded (2) radial locking bolt (1). This bolt carries a piston-like element (5) in a recess (8) in the gear housing (7). The recess collects grease detaching from the gear wheel (4) under centrifugal force, and the piston re-applies the grease every time the locking bolt is engaged. The piston may be made of plastics.

Description

Vorrichtung zum Arretieren des Getriebes von Device for locking the transmission of

Handkreissägen Die Erfindung bezieht sich auf eine Vorrichtung zum Arretieren von Handkreissägen, die einen unter der Wirkung einer Rückstellfeder stehenden Arretierbolzen enthält, dem in einem mit der Antriebswelle für das Sägeblatt vereinigten Bauteil Einrastaussparungen zugeordnet sind. Hand circular saws The invention relates to a device for Locking of circular saws, one under the action of a return spring contains standing locking bolt, which is in one with the drive shaft for the saw blade unified component snap-in recesses are assigned.

Wie die Praxis gezeigt hat, besteht insbesondere bei Handwerkzeugen mit einstufiger Untersetzung und Fett schmierung, wie z.B. Handkreissägen, die Gefahr, daß sich nach einer gewissen Betriebsdauer ein Teil der Getriebefettmenge am Getrieberand absetzt und damit für die Schmierung des Getriebes nicht mehr nutzbar ist. Um einen vorzeitigen Verschleiß des Getriebes zu verhindern, muß daher in bestimmten Zeitintervallen eine Nachschmierung durchgeführt werden, womit vor allem ein zusätzlicher Wartungsaufwand verbunden ist.As practice has shown, this is particularly the case with hand tools with single-stage reduction and grease lubrication, such as hand-held circular saws, the risk of that after a certain period of operation, part of the gear grease quantity is on the gear rim settles and can therefore no longer be used for the lubrication of the gearbox. To one To prevent premature wear of the transmission, must therefore in certain time intervals relubrication can be carried out, which means above all an additional maintenance effort connected is.

Es ist Aufgabe der Erfindung, die Schmierung des Getriebes von Handkreissägen zu verbessern und zugleich die Notwendigkeit einer Nachschmierung weitestgehend zu eliminieren.It is the object of the invention to lubricate the gearbox of circular saws to improve and at the same time the need for relubrication as far as possible to eliminate.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß auf dem Arretierbolzen ein Kolbenelement angeordnet ist, das in einer nischenartigen Erweiterung des Getriebegehäuses geführt und mit dem Arretierbolzen axial verschiebbar ist.This object is achieved according to the invention in that on the locking bolt a piston element is arranged in a niche-like extension of the transmission housing out and is axially displaceable with the locking bolt.

Der Gegenstand der Erfindung wird im nachstehenden anhand der Zeichnung, die ein Ausführungsbeispiel schematisch veranschaulicht, erläutert.The subject matter of the invention is explained below with reference to the drawing, which illustrates an embodiment schematically explained.

Es zeigen: Fig. 1 eine Seitenansicht des Getriebeteils teilweise im Schnitt, Fig. 2 eine Ansicht längs des Schnittes A-B durch Fig.1.There are shown: FIG. 1 a side view of the transmission part, partially in FIG Section, Fig. 2 is a view along the section A-B through Fig.1.

In den Figuren 1 und 2 ist mit 1 der unter der Wirkung einer Rückstellfeder 2 stehende Arretierbolzen, mit 3 eine mit dem Getriebezahnrad 4 baulich vereinigte oder mit diesem Zahnrad eine Baueinheit bildende Arretierscheibe und mit 5 ein auf dem verjüngten Schaftteil 6 des Arretierbolzens 1 angebrachtes Kolbenelement bezeichnet.In Figures 1 and 2, 1 is under the action of a return spring 2 standing locking bolts, with 3 one structurally combined with the gearwheel 4 or with this gear a structural unit forming locking disc and with 5 on the tapered shaft part 6 of the locking bolt 1 designated piston element attached.

Im Bereich des Kolbenelements 5 ist das Getriebegehäuse 7 nischenartig ausgebildet, derart, daß die Wandungen der Nische 8 das Kolbenelement seitlich begrenzen und insoweit als Führung dienen. Das Kolbenelement 5 ist in seinem dem Getriebezahnrad 4 zugewandten Bereich konkav ausgebildet, wobei der Krümmungsradius r wenigstens angenähert dem Radius r1 des Getriebezahnrads 4 angepaßt ist.In the area of the piston element 5, the gear housing 7 is niche-like designed in such a way that the walls of the niche 8 delimit the piston element laterally and to that extent serve as a guide. The piston element 5 is in its the transmission gear 4 facing area is concave, the radius of curvature r at least approximately the radius r1 of the gear wheel 4 is adapted.

Die Arretierscheibe 3 weist an ihrem Umfang Einrastaussparungen 9 auf, von denen beim Ausführungsbeispiel vier vorhanden sind, die um 900 räumlich gegeneinander versetzt angeordnet sind.The locking disk 3 has latching recesses 9 on its circumference on, of which there are four in the exemplary embodiment, around 900 spatially are arranged offset from one another.

In diese Aussparungen paßt der Zapfen 6'des Arretierbolzens 1.The pin 6 ′ of the locking bolt 1 fits into these recesses.

Die sich beim Betrieb der Handkreissäge in der Nische 8 ansammelnde Fettmenge bzw. ein Teil davon wird nun bei jeder Betätigung des Arretierbolzens 1 an das Getriebezahnrad 4 herangeschoben, dessen Antriebswelle 10 in einem Kugellager 11 gelagert ist und das von dem auf der Motorantriebswelle befindlichen Ritzel 12 angetrieben wird Der Arretierbolzen 1 wird dabei in der Regel immer dann betätigt, wenn das Sägeblatt ausgewechselt wird. Da das Sägeblatt spätestens nach seiner Abnützung ausgewechselt werden muß, was des öfteren der Fall ist, ist durch die Vorrichtung nach der Erfindung praktisch eine selbsttätige Nachschmierung gewährleistet.The accumulating in niche 8 when the circular saw is operated The amount of grease or part of it is now each time the locking bolt is actuated 1 pushed up to the gear wheel 4, the drive shaft 10 of which is in a ball bearing 11 is mounted and that of the pinion 12 located on the motor drive shaft is driven The locking bolt 1 is usually always actuated if the saw blade is replaced. Since the saw blade at the latest must be replaced after its wear, which is often the case practically automatic relubrication by the device according to the invention guaranteed.

Das gegebenenfalls auch aus einem Kunststoff bestehende Kolbenelement 5 ist gegen Abrutschen vom Zapfen 6 des Arretierbolzens 1 durch einen Seegerring 13 gesichert.The piston element, which may also consist of a plastic 5 is against slipping off the pin 6 of the locking bolt 1 by a circlip 13 secured.

Die erfindungsgemäße Vorrichtung ist auch bei Getrieben von Handschleifern (beim Wechseln der Schleifscheiben) sinngemäß anwendbar.The device according to the invention is also used in the gearboxes of hand grinders (when changing the grinding wheels) can be used accordingly.

Claims (2)

Patentansprüche @ Vorrichtung zum Arretieren des Getriebes von Handkreissägen, bestehend aus einem unter der Wirkung einer Rückstellfeder stehenden Arretierbolzen, dem in einem mit der Antriebswelle für das Sägeblatt vereinigten Bauteil Einrastaussparungen zugeordnet sind, dadurch gekennzeichnet, daß auf dem Arretierbolzen ein Kolbenelement angeordnet ist, das in einer nischenartigen Erweiterung des Getriebegehäuses geführt und mit dem Arretierbolzen axial verschiebbar ist. Claims @ device for locking the gearbox of circular saws, consisting of a locking bolt under the action of a return spring, the snap-in recesses in a component that is combined with the drive shaft for the saw blade are assigned, characterized in that a piston element on the locking bolt is arranged, which is guided in a niche-like extension of the transmission housing and is axially displaceable with the locking bolt. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Kolbenelement aus Kunststoff besteht. 2. Apparatus according to claim 1, characterized in that the piston element made of plastic.
DE19792942169 1979-10-18 1979-10-18 Device for locking the gear of portable circular saws Expired DE2942169C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792942169 DE2942169C2 (en) 1979-10-18 1979-10-18 Device for locking the gear of portable circular saws

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792942169 DE2942169C2 (en) 1979-10-18 1979-10-18 Device for locking the gear of portable circular saws

Publications (2)

Publication Number Publication Date
DE2942169A1 true DE2942169A1 (en) 1981-04-30
DE2942169C2 DE2942169C2 (en) 1984-05-24

Family

ID=6083788

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792942169 Expired DE2942169C2 (en) 1979-10-18 1979-10-18 Device for locking the gear of portable circular saws

Country Status (1)

Country Link
DE (1) DE2942169C2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0328958A2 (en) * 1988-02-13 1989-08-23 Gebr. Heller Maschinenfabrik GmbH Device for working rotation-symmetrical work piece surfaces
EP1193036A2 (en) * 2000-09-30 2002-04-03 Festool GmbH Hand machine tool with tool shaft locking device
WO2005025813A1 (en) * 2003-09-05 2005-03-24 Credo Technology Corporation Shaft lock mechanism for a rotary power hand tool
CN105817979A (en) * 2016-05-27 2016-08-03 浙江海王电器有限公司 Direct drive type angle grinder
GB2588831A (en) * 2019-11-11 2021-05-12 Evolution Power Tools Ltd A handheld circular cutter saw

Non-Patent Citations (1)

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

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0328958A2 (en) * 1988-02-13 1989-08-23 Gebr. Heller Maschinenfabrik GmbH Device for working rotation-symmetrical work piece surfaces
EP0328958A3 (en) * 1988-02-13 1991-03-06 Gebr. Heller Maschinenfabrik GmbH Device for working rotation-symmetrical work piece surfaces
EP1193036A2 (en) * 2000-09-30 2002-04-03 Festool GmbH Hand machine tool with tool shaft locking device
EP1193036A3 (en) * 2000-09-30 2003-12-17 Festool GmbH Hand machine tool with tool shaft locking device
WO2005025813A1 (en) * 2003-09-05 2005-03-24 Credo Technology Corporation Shaft lock mechanism for a rotary power hand tool
CN105817979A (en) * 2016-05-27 2016-08-03 浙江海王电器有限公司 Direct drive type angle grinder
GB2588831A (en) * 2019-11-11 2021-05-12 Evolution Power Tools Ltd A handheld circular cutter saw
GB2588831B (en) * 2019-11-11 2022-11-02 Evolution Power Tools Ltd A handheld circular cutter saw

Also Published As

Publication number Publication date
DE2942169C2 (en) 1984-05-24

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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
8339 Ceased/non-payment of the annual fee