EP3981532A1 - Tronçonneuse à chaîne et procédé de fonctionnement d'une tronçonneuse à chaîne - Google Patents

Tronçonneuse à chaîne et procédé de fonctionnement d'une tronçonneuse à chaîne Download PDF

Info

Publication number
EP3981532A1
EP3981532A1 EP20201369.4A EP20201369A EP3981532A1 EP 3981532 A1 EP3981532 A1 EP 3981532A1 EP 20201369 A EP20201369 A EP 20201369A EP 3981532 A1 EP3981532 A1 EP 3981532A1
Authority
EP
European Patent Office
Prior art keywords
chain
saw
motor
lifting device
guide rail
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.)
Pending
Application number
EP20201369.4A
Other languages
German (de)
English (en)
Inventor
Johannes Menzel
Marc Schmid
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.)
Andreas Stihl AG and Co KG
Original Assignee
Andreas Stihl AG and Co KG
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 Andreas Stihl AG and Co KG filed Critical Andreas Stihl AG and Co KG
Priority to EP20201369.4A priority Critical patent/EP3981532A1/fr
Priority to US17/496,520 priority patent/US20220111550A1/en
Priority to CN202111188158.2A priority patent/CN114309801A/zh
Publication of EP3981532A1 publication Critical patent/EP3981532A1/fr
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/14—Arrangements for stretching the chain saw
    • 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
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/0008—Means for carrying the chain saw, e.g. handles
    • 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
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/02—Chain saws equipped with guide bar

Definitions

  • the invention relates to a motor chain saw of the type specified in the preamble of claim 1 and a method for operating a motor chain saw of the type specified in the preamble of claim 15.
  • Motor chain saws which comprise a housing, a drive motor and a guide rail, the drive motor driving a saw chain guided on a guide rail via a drive sprocket.
  • the guide rail is detachably held on the housing of the motor chain saw by means of a fastening device.
  • the guide bar is tensioned using a tensioning device with the fastening device loosened.
  • the invention is based on the object of creating a motor chain saw of the generic type which enables the motor chain saw to be operated reliably and with reduced noise.
  • the invention is based on a further object of specifying a method for operating a motor chain saw of the generic type which enables the motor chain saw to be operated reliably and with reduced noise.
  • the further object is achieved by a method for operating a motor chain saw with the features of claim 15.
  • the motor chain saw according to the invention is based on the finding that the increase in the noise level during operation of the motor chain saw is due to the interaction of the saw chain and the guide rail. Wear on the drive sprocket, the guide bar and the saw chain as well as the heating of the saw chain lead to a reduction in saw chain tension. This in turn causes the saw chain to sag on its slack side, which is formed between the drive sprocket and the guide rail in the direction of movement of the saw chain. The slack side is the loose, not pulled and sagging side of the saw chain. As the saw chain sags on the slack side, the angle at which the saw chain contacts the guide bar also changes.
  • the guide rail of the power chain saw according to the invention is held on the housing by a releasable fastening device and, when the fastening device is released, can be displaced in the direction of its longitudinal axis when a tensioning device is actuated relative to the housing.
  • the motor chain saw includes a chain lifting device that is separate from the tensioning device. The chain lifting device is designed to deflect the saw chain in a direction away from the longitudinal axis of the guide bar.
  • the chain lifting device deflects the saw chain on the slack side in a direction away from the longitudinal axis of the guide rail, as a result of which sagging of the saw chain on the slack side is also reduced, in particular avoided, during operation of the motor chain saw.
  • the contact angle between the saw chain and the guide bar at the end of the slack side is reduced by the chain lifting device. This also reduces the noise level of the chainsaw.
  • the chain lifting device acts on the saw chain in such a way that the contact zone, in which the chain contacts the guide rail after passing through the slack side, moves away from the drive sprocket in the direction of the longitudinal axis, with the contact angle between the saw chain and the guide rail remains substantially constant.
  • the noise level during operation of the motor chain saw can also be kept essentially constant.
  • Another advantage of the chain lifting device is that by reducing the contact angle, the contact forces between the saw chain and the guide bar are also reduced. This can prevent material fatigue in the saw chain and guide bar, which increases the service life of the motor chain saw.
  • Another advantage is that the saw chain remains tensioned even when the motor chain saw is in operation. This ensures a noise reduction during the entire operation of the motor chain saw.
  • the chain lifting device is preferably designed to deflect the saw chain on the slack side. Accordingly, the chain lifting device acts on the saw chain directly on its slack side. Thus, even small forces are sufficient to deflect the saw chain away from the longitudinal axis of the guide rail, which causes a reduction in the sag and thus also in the contact angle.
  • the chain lifting device is designed in particular to deflect the saw chain when the motor chain saw is in operation. This avoids an increase in the slack of the saw chain in the slack side and thus also an increase in the noise level during operation of the motor chain saw.
  • the chain lifting device is advantageously arranged on the housing adjacent to the slack side.
  • the chain lifting device can act on the saw chain in a targeted manner on the slack side.
  • the chain lifting device could be arranged on the tightening strand adjacent to the tightening strand.
  • the chain lifting device would have to be designed in such a way that significantly higher forces act on the saw chain in order to reduce the sag on the slack side.
  • the chain lifting device has an operating position and an inoperative position, with the chain lifting device causing the deflection of the saw chain only in the operating position.
  • the chain lifting device In the inoperative position, the chain lifting device does not act on the saw chain.
  • the saw chain can be tensioned by means of the tensioning device by moving the guide rail.
  • the chain hoist does not counteract the tensioning device in its inoperative position. This allows easy re-tensioning of the saw chain. If the motor chain saw is then put into operation, the chain lifting device is again in the operating position, which means that it also acts on the saw chain.
  • the chain lifting device preferably comprises a magnet, with the saw chain being able to be deflected on the slack side in particular by a magnetic force exerted by the magnet. Direct contact between the chain lifting device and the saw chain can be avoided by deflecting the saw chain using a magnet. As a result, the chain lifting device can act on the saw chain without wear or noise.
  • the motor chain saw preferably has a protective contact connected to a motor control unit to prevent contact between the chain lifting device and the saw chain. Due to the chain lifting device, the saw chain remains tensioned even when the motor chain saw is in operation, so that the operator cannot see the elongation of the saw chain when the motor chain saw is in operation. After the chain saw has been in service for a certain period of time, this could lead to contact between the chain lifting device and the saw chain, which could damage the respective components. A protective contact is provided to prevent this.
  • the protective contact works in particular with a protective plate.
  • the protective plate is arranged between the saw chain and the chain lifting device so that mutual contact between the saw chain and the chain lifting device is avoided.
  • the protective plate is preferably designed to be resilient.
  • the saw chain makes contact with the protective plate, it springs back and at the same time activates the protective contact.
  • the signal coming from the protective contact is recorded by the engine control unit. Appropriate measures are then initiated via the engine control unit, which let the operator recognize that the saw chain needs to be tightened again.
  • the chain lifting device preferably includes a displacement sensor for detecting the distance between the magnet and the saw chain.
  • a displacement sensor for detecting the distance between the magnet and the saw chain.
  • the magnet is preferably a permanent magnet. This enables a particularly simple construction of the chain lifting device.
  • the magnet can in particular also be an electromagnet.
  • the electromagnet is powered by the engine control unit. As a result, the electromagnet can be activated or deactivated in a simple manner. This allows the operator to easily switch the chain hoist from the operative position to the inoperative position.
  • An adjusting device for adjusting the magnet into the operating position and into the inoperative position is preferably provided.
  • the adjusting device is in particular a bellows or preferably a positioning electromagnet.
  • the position of the magnet can be changed by the adjusting device in such a way that it does not cause any deflection on the saw chain. If the chain lifting device is to be switched to the operating position, the magnet is repositioned via the adjusting device in such a way that the magnet causes the saw chain to be deflected on the slack side.
  • Motor chain saw 1 shown has a housing 2 on which a rear handle 26 and a handle tube 27 for guiding the motor chain saw 1 are fixed.
  • a guide rail 5 protrudes forward.
  • a saw chain 7 is arranged circumferentially on the guide rail 5 and is driven by a drive motor 3 shown schematically.
  • the drive motor 3 is in particular an internal combustion engine, advantageously a two-stroke engine or a mixture-lubricated four-stroke engine.
  • the drive motor 3 can also be an electric motor that can be supplied with energy via a rechargeable battery or via a connecting cable.
  • the drive motor 3 drives a drive shaft 28 which protrudes from the housing 2 .
  • a drive chain wheel 4 is arranged on the drive shaft 28 .
  • the drive sprocket 4 is used to drive the saw chain 7, which is guided over the drive sprocket 4 during operation.
  • a contact surface 29 is formed on the housing 2, against which the guide rail 5 rests when the motor chain saw 1 is in the assembled state.
  • a bolt 30 is screwed into the housing 2 .
  • the bolt 30 has two threaded sections which are separated from one another by a circumferential collar. The section facing the housing 2 is screwed into the housing 2 .
  • the guide rail 5 is fixed on the outwardly protruding section.
  • the guide rail 5 has a receiving opening 31, which is designed as a slot in the embodiment.
  • a housing cover 32 is provided which has an opening 33 for the bolt 30 .
  • the housing cover 32 is to be fastened to the bolt 30 using a nut 34 .
  • the housing cover 32 has a clamping surface facing the guide rail 5 and forms a fastening device 8 with the nut 34.
  • the guide rail 5 is at its end 42 between the contact surface 29 of the housing 2 and the clamping surface of the housing cover 32 via the Nut 34 held clamped.
  • the nut 34 is loosened and the guide rail 5 can be displaced forwards away from the drive sprocket 4 in its longitudinal direction via a clamping device 10 .
  • the guide rail 5 has a longitudinal axis 6.
  • the longitudinal axis 6 runs centrally through the guide rail 5 approximately parallel to the horizontal floor 40.
  • the term “roughly” is to be understood in this way that the longitudinal axis 6 encloses an angle of at most 15° with the bottom 40 .
  • the guide rail 5 has a longitudinal plane 41 which contains the longitudinal axis 6 when the motor chain saw 1 is parked on a level horizontal floor 40 and is perpendicular to the floor 40 .
  • the tensioning device 10 is used to tension the saw chain 7.
  • the tensioning device 10 is in 1 only indicated by openings in the guide rail 5, which only form part of the clamping device 10. Further components, not shown, of the clamping device 10 engage in these openings, as a result of which the clamping device 10 is firmly connected to the guide rail in the direction of the longitudinal axis 6 .
  • the operator can use the tensioning device 10 to move the guide rail 5 in the direction of the longitudinal axis 6 and thereby tension the saw chain 7 .
  • various clamping devices 10 can be used, which are known from the prior art in various designs.
  • the motor chain saw 1 as shown in 1 shown, a chain lifting device 11, which is used to deflect the saw chain 7 in the direction of the longitudinal axis 6 away.
  • the chain lifting device 11 is preferably arranged on the housing 2 of the motor chain saw 1, in particular in the longitudinal direction 6 of the guide rail 5 between the drive chain wheel 4 and the guide rail 5.
  • the drive sprocket 4 drives the saw chain 7 to revolve around the guide rail 5 in a direction of movement 35 .
  • the direction of movement 35 of the saw chain 7 runs correspondingly when the motor chain saw 1 is parked on the floor 40 on a top side 37 of the guide rail 5 facing away from the floor 40 from the drive sprocket 4 in the direction of the guide rail 5 and on a dem Ground-facing underside 36 of the guide rail 5 from the guide rail 5 in the direction of the drive sprocket 4.
  • a run is formed between the guide rail 5 and the drive chain wheel 4 both on the underside 36 and on the upper side 37 of the guide rail 5 .
  • the strand formed between the drive sprocket 4 and the upper side 37 of the guide rail 5 is a slack strand 9.
  • the saw chain 7 again contacts the guide rail 5 in a contact zone 38.
  • the slack strand 9 is a loose strand that has not been pulled through the drive sprocket 4 and sagging strand.
  • the strand formed between the underside 36 of the guide rail 5 and the drive chain wheel 4 is a tight strand.
  • the chain lifting device 11 shown only schematically acts on the saw chain 7 in such a way that the saw chain 7 is deflected in the slack side 9 in the direction of the longitudinal axis 6 of the guide rail 5 away.
  • the sag of the saw chain 7 in the slack side 9 is reduced, in particular completely eliminated, with the contact angle ⁇ being reduced.
  • the contact angle ⁇ is enclosed by the upper side 37, in particular by the contour of the guide rail 5 on the upper side 37 and the direction of movement 35 of the saw chain 7 in the contact zone 38.
  • the smaller the contact angle ⁇ the smaller the contact forces in the contact zone 38 between the saw chain 7 and the guide rail 5.
  • the contact angle ⁇ is preferably less than 15°, in particular less than 10°, advantageously less than 5°.
  • the chain lifting device 11 is designed such that contact between the saw chain 7 and the guide rail 5 is as tangential as possible. If the saw chain 7 is deflected by the chain lifting device 11, the contact zone 38 between the saw chain 7 and the guide bar 5 is displaced in the direction of the longitudinal axis 6 away from the drive sprocket 4.
  • the contact angle ⁇ between the guide bar 5 and the saw chain 7 is thus reduced. As a result, the noise level when the saw chain 7 hits the guide rail 5 is minimized. Since the contact forces are reduced in the contact zone 38, this also causes the motor chain saw 1 to be operated in a material-friendly manner, as a result of which the service life of the saw chain 7 and the guide rail 5 is increased.
  • the chain lifting device 11 is designed as a magnet 12,14.
  • the magnet 12, 14 generates a magnetic force F, which deflects the saw chain 7 away from the longitudinal axis 6 of the guide rail 5.
  • the chain lifting device 11 thus acts on the saw chain 7 without wear.
  • a protective contact 16 can be provided in an advantageous embodiment of the chain lifting device 11 .
  • the protective contact 16 is preferably designed as a protective plate 17 .
  • the protective contact 16 is arranged between the magnets 12, 14 and the saw chain 7. If the slack of the saw chain 7 in the slack side 9 of the saw chain 7 is correspondingly large, there is contact between the deflected saw chain 7 and the protective contact 16.
  • the protective plate 17 forms additional mechanical protection for the chain lifting device 11.
  • the protective plate 17 is preferably designed to be resilient, as a result of which it can yield elastically when it comes into contact with the saw chain 7.
  • the signal from the protective contact 16 can be further processed via a motor control unit 15 .
  • the contact between saw chain 7 and grounding contact 16 can, for example, via a warning display 19 to the operator be signalled. The operator can then stop the operation of the motor chain saw 1 and retension the saw chain 7 using the tensioning device 10 .
  • the motor chain saw according to 4 includes the chain lifting device 11 a displacement sensor 18 which determines the distance between the magnet 12, 14 and the saw chain 7.
  • the displacement sensor 18 is preferably arranged next to the magnets 12,14.
  • the displacement sensor 18 is coupled to the warning display 19 via an engine control unit 15 . With preset threshold values, shorter distances can be communicated to the operator using different signal types.
  • the warning display 19 can be formed from one or more lights that signal the distance between the saw chain 7 and the magnet 12, 14, for example, via the flashing frequency or the color.
  • a protective contact 16 can also be provided for switching off the motor chain saw 1 and for protecting the chain lifting device 11 .
  • FIG. 6 Another exemplary embodiment of the chain lifting device 11 is shown, in which an electromagnet 14 for deflecting the saw chain 7 is provided instead of a permanent magnet 12 .
  • the electromagnet 14 is supplied with power via the engine control unit 15 .
  • the electromagnet 14 can be switched on and off in a targeted manner via the engine control unit 15 . This is particularly advantageous when the saw chain 7 has to be tightened. If the motor chain saw is not in operation, the electromagnet 14 and thus the chain lifting device 11 are also deactivated. This enables the operator to easily push the guide bar 5 forward when the chain lifting device 11 is deactivated and to tension the saw chain 7 .
  • the design of the electromagnet can also be combined with the mudguard and the displacement sensor 18 with the warning display 19 .
  • the chain lifting device 11 is provided with a permanent magnet 12, this must be removed when re-tensioning the saw chain 7. If the saw chain is tensioned, the permanent magnet 12 can be reinserted into the housing 2 . Alternatively, the operator can apply such a high tensioning force that tensions the saw chain against the magnetic force F of the permanent magnet 12 .
  • a chain lifting device 11 with permanent magnets 12 is shown. Furthermore, the chain lifting device 11 includes an adjustment device 25, via which the permanent magnet 12 in an inoperative position 21 ( 7 ) and an operating position 20 ( 8 ) can be moved.
  • the adjusting device 25 is designed in such a way that the chain lifting device 11 is in the inoperative position 21 when the motor chain saw 1 is switched off. Accordingly, the permanent magnet 12 is pushed away from the saw chain 7 by the adjustment device 25 in such a way that the permanent magnet 12 does not cause any deflection of the saw chain 7 in the slack side 9 . If the motor chain saw 1 is switched on, the chain lifting device 11 is switched to the operating position 20 via the adjusting device 25 . The permanent magnet 12 is then positioned by the adjusting device 25 so close to the saw chain 7 that the latter is deflected again by the magnetic force F.
  • the adjusting device 25 is in the embodiment according to the Figures 7 and 8 formed as a bellows 22.
  • the permanent magnet 12 is attached to the bellows 22 .
  • the bellows 22 can be coupled to the motor via a venturi principle, for example. By contracting and expanding the bellows 22, the permanent magnet 12 is displaced accordingly.
  • this embodiment of the motor chain saw 1 can also be combined with the displacement sensor 18 for determining the distance between the saw chain 7 and the permanent magnet 12 .
  • the adjusting device 25 is formed by a positioning electromagnet 23 with a return spring 24 .
  • the permanent magnet 12 is provided with an anchor plate attached to the return spring 24 tied together.
  • the positioning electromagnet 23 pulls the anchor plate and thus also the permanent magnet 12 towards itself, as a result of which the chain lifting device is activated. If the positioning electromagnet 23 is deactivated, the return spring 24 pulls the permanent magnet 12 back into the starting position and thus deactivates the chain lifting device 11.
  • the positioning electromagnet 23 is coupled to the motor control unit 15 and is supplied with current via this.
  • the positioning electromagnet 23 can be actuated in a targeted manner via the motor control unit 15 and the chain lifting device 11 can be switched into the operating position 20 and into the inoperative position 21 . Also the statements of Figures 7 to 10 can be combined with the warning display.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
EP20201369.4A 2020-10-12 2020-10-12 Tronçonneuse à chaîne et procédé de fonctionnement d'une tronçonneuse à chaîne Pending EP3981532A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20201369.4A EP3981532A1 (fr) 2020-10-12 2020-10-12 Tronçonneuse à chaîne et procédé de fonctionnement d'une tronçonneuse à chaîne
US17/496,520 US20220111550A1 (en) 2020-10-12 2021-10-07 Chain saw and method for operating a chain saw
CN202111188158.2A CN114309801A (zh) 2020-10-12 2021-10-12 机动链锯和用于运行机动链锯的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20201369.4A EP3981532A1 (fr) 2020-10-12 2020-10-12 Tronçonneuse à chaîne et procédé de fonctionnement d'une tronçonneuse à chaîne

Publications (1)

Publication Number Publication Date
EP3981532A1 true EP3981532A1 (fr) 2022-04-13

Family

ID=72840400

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20201369.4A Pending EP3981532A1 (fr) 2020-10-12 2020-10-12 Tronçonneuse à chaîne et procédé de fonctionnement d'une tronçonneuse à chaîne

Country Status (3)

Country Link
US (1) US20220111550A1 (fr)
EP (1) EP3981532A1 (fr)
CN (1) CN114309801A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4008491A1 (fr) * 2020-12-04 2022-06-08 Hilti Aktiengesellschaft Machine-outil doté d'une première poignée, d'une seconde poignée et d'un corps principal

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1173229B (de) * 1959-05-22 1964-07-02 Andreas Stihl Spannvorrichtung fuer Motorkettensaegen fuer Einstecharbeiten
US3390710A (en) * 1966-04-14 1968-07-02 Outboard Marine Corp Chain saw
DE20319743U1 (de) * 2003-10-24 2005-03-10 Dolmar Gmbh Kontrollvorrichtung, insbesondere für eine Kettensäge o.dgl.
WO2011155880A1 (fr) * 2010-06-07 2011-12-15 Husqvarna Ab Tendeur de chaîne automatique
EP3385045A1 (fr) * 2017-04-04 2018-10-10 Andreas Stihl AG & Co. KG Tronçonneuse à chaîne

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5997423A (en) * 1996-11-20 1999-12-07 Lg Industrial Systems Co., Ltd. Apparatus for controlling chain tension
DE19744888C1 (de) * 1997-10-10 1999-04-15 Stihl Maschf Andreas Geräuscharme Schneidgarnitur für eine Motorkettensäge
DE10323910A1 (de) * 2003-05-23 2005-01-05 Siemens Ag Kettenumlaufeinrichtung bzw. Bandumlaufeinrichtung und Verfahren zu deren Betrieb

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1173229B (de) * 1959-05-22 1964-07-02 Andreas Stihl Spannvorrichtung fuer Motorkettensaegen fuer Einstecharbeiten
US3390710A (en) * 1966-04-14 1968-07-02 Outboard Marine Corp Chain saw
DE20319743U1 (de) * 2003-10-24 2005-03-10 Dolmar Gmbh Kontrollvorrichtung, insbesondere für eine Kettensäge o.dgl.
WO2011155880A1 (fr) * 2010-06-07 2011-12-15 Husqvarna Ab Tendeur de chaîne automatique
EP3385045A1 (fr) * 2017-04-04 2018-10-10 Andreas Stihl AG & Co. KG Tronçonneuse à chaîne

Also Published As

Publication number Publication date
CN114309801A (zh) 2022-04-12
US20220111550A1 (en) 2022-04-14

Similar Documents

Publication Publication Date Title
DE102006003207B4 (de) Gehäusedeckelanordnung
EP3981533A1 (fr) Tronçonneuse à chaîne et procédé permettant de tendre une chaîne de scie d'une tronçonneuse à chaîne
DE102005017038A1 (de) Zugmitteltrieb, insbesondere Riementrieb für Nebenaggregate eines Verbrennungsmotors
EP1332023A1 (fr) Machine-outil a main comportant au moins une poignee
EP3981532A1 (fr) Tronçonneuse à chaîne et procédé de fonctionnement d'une tronçonneuse à chaîne
EP1781913A1 (fr) Logement a point d'appui d'un organe
DE2825177A1 (de) Brennkraftmaschine
DE3446162C2 (de) Haltevorrichtung für einen Kompressors und einen den Kompressor antreibenden Motor auf einem Drucklufttank
DE19629855C1 (de) Vorrichtung zur Befestigung eines Einspritzdüsenhalters
EP0711385B1 (fr) Systeme d'entrainement
EP1744861A1 (fr) Scie a chaine
US5103881A (en) Log cutting apparatus
DE19744888C1 (de) Geräuscharme Schneidgarnitur für eine Motorkettensäge
EP3412392A1 (fr) Appareil de travail manuel comprenant un outil et un dispositif de frein pour l'outil
DE19706073A1 (de) Stall-Entmistungsanlage
DE19805821A1 (de) Sägeketten-Spannvorrichtung für eine Kettensäge
DE102004012606B4 (de) Schutzvorrichtung für Seilsägevorrichtungen
EP1794474B1 (fr) Commande de mecanisme de traction utilise en particulier pour un moteur
DE102019121221B4 (de) Kettenspannvorrichtung einer Kettensäge
DE10353737B4 (de) Kettenspannvorrichtung für eine Motorkettensäge
DE19934352B4 (de) Kettensäge
DE202004010205U1 (de) Spannvorrichtung für eine Kettensäge
DE10040334A1 (de) Elektrowerkzeug mit Arretiervorrichtung
DE19831864A1 (de) Spannrollenanordnung für einen Endlostrieb an einer Brennkraftmaschine
DE29613157U1 (de) Stichsäge mit Sägeblatt mit Keilrücken

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20221013

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR