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EP2422945B1 - Kettensägenanordnung - Google Patents

Kettensägenanordnung Download PDF

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Publication number
EP2422945B1
EP2422945B1 EP11190338.1A EP11190338A EP2422945B1 EP 2422945 B1 EP2422945 B1 EP 2422945B1 EP 11190338 A EP11190338 A EP 11190338A EP 2422945 B1 EP2422945 B1 EP 2422945B1
Authority
EP
European Patent Office
Prior art keywords
control portion
chainsaw
exchangeable
exchangeable part
view
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.)
Active
Application number
EP11190338.1A
Other languages
English (en)
French (fr)
Other versions
EP2422945A1 (de
Inventor
Mats Andersson
Rikard Rydberg
Stefan Stark
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.)
Husqvarna AB
Original Assignee
Husqvarna AB
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 Husqvarna AB filed Critical Husqvarna AB
Priority to ES11190338.1T priority Critical patent/ES2616575T3/es
Priority to EP11190338.1A priority patent/EP2422945B1/de
Priority claimed from EP09844710.5A external-priority patent/EP2429784A4/de
Publication of EP2422945A1 publication Critical patent/EP2422945A1/de
Application granted granted Critical
Publication of EP2422945B1 publication Critical patent/EP2422945B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B27B17/0008—Means for carrying the chain saw, e.g. handles

Definitions

  • the present invention relates to a so called top handle chainsaw as per the preamble of claim 1.
  • the terms 'front' and 'rear' are used to designate relative locations along a longitudinal axis of the chainsaw.
  • the guide bar for example, is located at the front end of the chainsaw, while the opposite end will be referred to as the rear end of the chainsaw.
  • 'left' and 'right' are used to designate relative locations in relation to the longitudinal axis as if a user holds the chainsaw.
  • Top handle chainsaws are sometimes held and guided by the one hand holding the control portion while the operator only secures his hold with the other hand. Acting forces on the chainsaw produces tilt movements which must be compensated for by an appropriate effort of the hand holding the control portion in order to keep the chainsaw in a neutral position. This causes a considerable load on the wrist of the operator.
  • US5018492 teaches a chainsaw provided with a housing portion arranged as a support for the heel of the hand which decreases the effort for holding the chainsaw in a neutral position despite tilt movements in a forward direction of the chainsaw.
  • fig. 1 of US5018492 shows that the part of the housing portion that functions as said support for the heel of the hand is a sharp edge, which is not very comfortable to the heel of the hand.
  • control portion of a top handle chainsaw does not provide for an ergonomic grip.
  • a problem has been that the control portion of the chainsaw rotates in the hand of the operator such that the operator has difficulty to hold the chainsaw in a desired inclined position.
  • many users experience that the wrist of the hand holding the control portion is often extensively bent while operating the chainsaw, which has proved to be unfavourable.
  • control portions of conventional top handle chainsaws do not fit various sizes of hands, and a bad fit may cause a worse control of the chainsaw and ergonomic disadvantages.
  • a top handle chainsaw as per the preamble of claim 1 is known from US 2002/0129502 A1 .
  • the object of the invention is to provide a handle section of a chainsaw that provides possibilities to fit a larger group of users or to fit different types of conditions.
  • a further object of the invention is to provide a handle section of the aforementioned chainsaw that provides possibilities to adjust the characteristics of the control portion to fit e.g. differently sized hands of a large group of users.
  • the at least one first exchangeable part may differ in its characteristics from an at least one second exchangeable part, such that the surface structure of at least a part of the control portion may be adjusted by exchanging the at least one first to the at least one second exchangeable part.
  • a surface structure providing for a grip fulfilling the different needs of a larger group of users can be provided.
  • examples of such different structures may be ribs, grooves or recesses or other structures that provides increased friction or other desired properties to the control portion.
  • one exchangeable part may be exchanged to another part made of a different polymeric or preferably elastomeric material in order to provide for better grip conditions.
  • different types of surface materials or structures are better adapted to various conditions such as cold, hot, wet or dry environments.
  • control portion should not start rotating in the hand when the operator changes working position or working angle of the chainsaw. It is therefore beneficial having the possibility to exchange at least a part of the control portion to provide for a better grip for a certain user under certain conditions.
  • At least a portion of the at least one exchangeable part is in contact with the hand of the user during operation of the chainsaw and at least a part of said portion of the at least one exchangeable part has a generally convex shape, as seen in an above view.
  • the exchangeable parts may be more or less convex to fit to the hands of a large group of users.
  • a part of said portion has a generally concave shape, which also provides for a better grip, especially when said portion is arranged for receiving a part of the fore finger of the hand holding the control portion.
  • the left side of the control portion is an integrated part with the handle section such that the left side of the control portion is not detachable.
  • the right side of the control portion only to the left side of the control portion, which right side may be attached to the left side with a number of screws, such as two or three screws, or alternatively four, five or six.
  • a number of screws such as two or three screws, or alternatively four, five or six.
  • the left side of the control portion holds the throttle lever and/or a safety button.
  • the exchangeable part of the right side of the control portion which preferably is the whole right side of the control portion, can be detached or exchanged without interfering with components such as the throttle lever and/or the safety button.
  • the throttle lever and/or the safety button secured to both sides there is also a risk that the positions of the components will be disturbed when securing the right side to the left side, which might cause the components not to function very well.
  • the exchangeable part/s is made of a polymeric material or more preferably an elastomeric material or even more preferably a TPE material.
  • a polymeric material or more preferably an elastomeric material or even more preferably a TPE material.
  • Fig. 1 shows a perspective view of a top handle chainsaw 1 according to a preferred embodiment of the present invention.
  • the chainsaw 1 includes a driving unit 25, which may include an internal combustion engine or an electric motor, for driving a cutting chain 11 around a guide bar 10.
  • the chainsaw 1 is held and controlled, preferably with the right hand, by means of the control portion 3, which control portion 3 includes a left- 4 and a right side 5, a throttle lever 8 on the under side for controlling the speed of the driving unit 25, preferably with the fore finger, and a safety button 9 on the upper side for preventing unintentional movement of the cutting chain 11.
  • the control portion 3 is in turn a part of a handle section 2, which also includes a bail type hold portion 21, which extends on the left side of the chainsaw 1.
  • the hold portion 21 is preferably held by the left hand and is mainly used for securing the hold of the control portion 3.
  • the hold portion 21 may be held at various positions e.g. depending on how the chainsaw 1 is oriented when operating said chainsaw 1 and the position of the hold of the hold portion 21 may easily be changed by a sliding movement of the hand along the hold portion 21.
  • the handle section 2 further includes a housing portion 12 which in the case of the driving unit 25 including an internal combustion engine preferably accommodates a carburettor and a fuel tank. In the case of an electric motor the housing portion 12 may accommodate a battery.
  • the handle section 2 is devibrated in relation to a body part 24 of the chainsaw 1, which body part 24 includes the driving unit and to which body part 24 the guide bar 10 is connected.
  • Devibration elements such as e.g. coil springs are used on at least three positions between the handle section 2 and the body part 24 and the amount of vibrations experienced by the user holding the handle section 2 is far less compared to having no devibration.
  • a hand guard 14 projects in front of the handle section 2, which hand guard 14 is arranged to actuate a brake to brake the movement of the cutting chain 11 when the hand guard 14 is pivoted e.g. from a kick-back.
  • the hand guard 14 is made of a polymeric material and includes a see-through protective structure 15.
  • the protective structure 15 is see-through as it is provided with holes. In the preferred embodiment the holes have a so called honey comb shape, which means they are provided with six edges.
  • Fig. 2 shows the chainsaw 1 according to the preferred embodiment from an above view.
  • the left side of the control portion 3 is forming one unit with the housing portion 12 and the right side 4 of the control portion 3 is connected to said left side 5 of the control portion 3.
  • the left side 4 is preferably provided with a front recess 19 intended for gripping with the thumb of the hand holding the control portion 3.
  • the thumb support surface part 23 could be disposed on an upper side of either the control portion 3 or the hold portion 2 and serves as an alternative support for the thumb of the hand holding the control portion 3.
  • the thumb support surface part 23 has proved beneficial when applying pressure between the cutting chain 11 and the object being cut, other than that pressure caused by the weight of the chainsaw 1. This is especially advantageous when the orientation of the chainsaw 1 differs from an up right position, which implies that there is not much or no help from the weight of the chainsaw 1 when applying pressure.
  • Using the thumb support surface part 23 as a support for the thumb is e.g. less exhausting and probably it may also increase the accuracy of the cut.
  • the left side of the control portion 3 is also provided with an elongated recess 20, substantially elongated along a longitudinal axis of the control portion 3.
  • the elongated recess 20 is intended for receiving the finger tips of the little finger, the ring finger and the middle finger of the hand holding the control portion 3, but this may vary depending on the size of the hand of the user.
  • the elongated recess 20 has proved beneficial for providing a good grip of the control portion 3 and preventing the control portion 3 to start rotating in the hand of the user. Also, the elongated recess 20 provides for a good grip for various sizes of hands.
  • Fig. 3 is a side view of the preferred embodiment of the invention and shows a first-16 and a second longitudinal axis 17.
  • the first longitudinal axis 16 is defined as extending substantially along a centre of the guide bar 10 and the second longitudinal axis 17 substantially extends along an upper side of the control portion 3.
  • the size of the angle, A, between the second- 17 and the first longitudinal axis 16 has impact on how much the hand holding the control portion 3 will be bent during operation of the chainsaw 1.
  • the angle, A according to the preferred embodiment of the invention is about 15°, but may be up to about 45° and still be advantageous. For A greater than 45° the chainsaw 1 becomes high, and probably less versatile when operating in limited spaces.
  • An outer surface part 13 of the housing portion 12, which hereinafter will referred to as the support surface 13, is connected to a rear part of the control portion 3 and is a support for the heel of the hand when operating the chainsaw 1.
  • the support surface 13 essentially defines a plane 18 that forms an angle, B, with the second longitudinal axis 17, which axis substantially extends along an upper side of the control portion 3, as seen in the side view.
  • the angle B is about 121°, which has proved to provide for a good support for the heel of the hand holding the control portion 3.
  • the advantages are present for B being in the range 105°-140°.
  • the support surface extends about 30mm in a rightward direction from a rightmost rear end of the right side 5 of the control portion 3.
  • the support surface may extend at least 24mm, e.g. 35mm, and still provide for a good support for the heel of the hand.
  • the rightmost portion of the support surface 13 may also deviate from the plane 18 because of a bevelling of the housing portion 12.
  • Fig. 4 is a side view of the exchangeable right side 5 of the control portion 3 and the same right side 5 is shown in fig. 5 in a perspective view.
  • the right side will also be referred to as the exchangeable part 6, 6' and may be exchanged to another exchangeable part 6, 6' with other characteristics.
  • the exchangeable part 6, 6' may be smaller and may just form a part of the right side 5 of the control portion 3.
  • at least a part of the left side 4 of the control portion 3 may be composed of at least one exchangeable part 106, 106'.
  • the right side 5 of the control portion 3 is secured to the left side 4 of the control portion 3 with four screws. The number of screws may of course vary, e.g.
  • the throttle lever 8 and the safety button 9 are both only secured to the left side 4 of the control portion 3, and not to the right side 5, which provides for easy detaching or attaching of the exchangeable part 6, 6' without interfering with said throttle lever 8 or safety button 9. Also, this prevents the throttle lever 8 and the safety button 8 to become affected in a way to disturb their functions.
  • only the throttle lever 8 is only secured to the left side 4.
  • an exchangeable part 106, 106' on the left side 4 is of such a small size that it allows the throttle lever 8 and safety button 9 to be secured to a main portion of the left side 4.
  • Fig. 6 and 7 are above views of two different exchangeable parts 6, 6' with different widths.
  • the first exchangeable part 6 can easily be exchanged to the second 6' and vice versa to make the control portion 3 fit to a hand with different proportions.
  • the exchangeable part/s 6, 6', 106, 106' can be provided with different surface structure to fit to the users needs. Examples of such surface structures may be grooves, ribs or recesses.
  • the material of the part of the control portion 3 that is in contact with the hand is made of a TPE-material, but of course the choice of material may vary with different conditions, and another polymeric material may be preferable, such as another elastomeric material.
  • the part of the exchangeable part 6, 6' that is in contact with the hand during operation has a substantially convex shape in order to fit better to the hand of the user, although the right recess 7 of the control portion 3 also provides for a smaller concave shape.
  • This recess 7 is intended for receiving parts of the fore finger of the hand holding the control portion 3.
  • the right recess 7 together with the left recess 19 on the left side 4 of the control portion 3 forms a part of the control portion 3 with less width. This provides for a better grip and a better control of the throttle lever 8.

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

Claims (13)

  1. Obergriff-Kettensäge, umfassend:
    eine Führungsschiene (10);
    eine Schneidkette (11); und
    eine Antriebseinheit (25), die angeordnet ist, um die Schneidkette (11) um die Führungsschiene (10) herum anzutreiben; wobei die Führungsschiene (10) eine erste Längsachse (16) definiert, die sich, in einer Seitenansicht gesehen, entlang einer Mitte der Führungsschiene (10) erstreckt;
    einen Handgriffabschnitt (2) zum Tragen und Bedienen der Kettensäge (1), wobei der Handgriffabschnitt (2) einen Steuerungsteil (3) umfasst, der an der Oberseite der Kettensäge (1) angeordnet ist, wobei der Steuerungsteil (3) einen Drosselhebel (8) zur Steuerung der Drehzahl der Antriebseinheit (25) umfasst, und der Steuerungsteil (3) eine linke (4) und eine rechte (5) Seite aufweist,
    wobei die rechte Seite (5) des Steuerungsteils einen ersten austauschbaren Teil (6) umfasst, der abnehmbar mit der linken Seite (4) des Steuerungsteils (3) verbunden ist;
    dadurch gekennzeichnet, dass die Kettensäge des Weiteren zumindest einen zweiten austauschbaren Teil (6') umfasst, gegen den der erste austauschbare Teil (6) ausgetauscht werden kann, wobei sich der erste austauschbare Teil (6) von dem zumindest zweiten austauschbaren Teil (6') darin unterscheidet, dass die Oberflächenstruktur und/oder die Breite und/oder das Material zumindest eines Teils des Steuerungsteils (3) eingestellt werden kann, indem der erste (6) gegen den zumindest einen zweiten austauschbaren Teil (6') ausgetauscht wird.
  2. Kettensäge (1) nach Anspruch 1, wobei zumindest ein Abschnitt des zumindest einen austauschbaren Teils (6, 6') während des Betriebs der Kettensäge (1) in Kontakt mit der Hand des Benutzers ist, und zumindest ein Teil des Abschnitts des zumindest einen austauschbaren Teils (6, 6') eine im Allgemeinen konvexe oder konkave Gestalt aufweist.
  3. Kettensäge (1) nach einem der Ansprüche 1-2, wobei der zumindest eine austauschbare Teil (6, 6') ein austauschbarer Teil (6, 6') ist und die rechte Seite (5) des Steuerungsteils (3) bildet, und die rechte Seite (5) des Steuerungsteils (3) abnehmbar mit der linken Seite (4) des Steuerungsteils (6) verbunden ist.
  4. Kettensäge (1) nach Anspruch 3, wobei die linke Seite (4) des Steuerungsteils (3) einteilig mit dem Handgriffabschnitt (2) ist, so dass die linke Seite (4) des Steuerungsteils (3) nicht abnehmbar ist.
  5. Kettensäge (1) nach Anspruch 4, wobei die linke Seite (4) des Steuerungsteils (3) den Drosselhebel (8) und/oder einen Sicherheitsknopf (9) hält, so dass die rechte Seite (5) des Steuerungsteils (3) einfach ausgetauscht oder von der linken Seite (4) des Steuerungsteils (3) abgenommen werden kann, ohne mit dem Drosselhebel (8) und/oder dem Sicherheitsknopf (9) zu interferieren.
  6. Kettensäge (1) nach einem der vorhergehenden Ansprüche, wobei zumindest ein Abschnitt des/der austauschbaren Teil(e) (6, 6') aus einem Polymermaterial hergestellt ist, vorzugsweise einem Elastomermaterial, und noch bevorzugter aus einem TPE-Material.
  7. Kettensäge (1) nach einem der vorhergehenden Ansprüche, wobei der Steuerungsteil (3) eine zweite Längsachse (17) definiert, die sich, in einer Seitenansicht gesehen, im Wesentlichen entlang einer Oberseite zumindest eines Teils des Steuerungsteils (3) erstreckt, und wobei ein Winkel A zwischen der ersten (16) und der zweiten Längsachse (17) zwischen 14° und 45°, vorzugsweise zwischen 14° und 30°, und noch bevorzugter zwischen 14° und 25° beträgt, jeweils in einer Seitenansicht gesehen.
  8. Kettensäge (1) nach Anspruch 7, wobei A zwischen 14° und 20°, vorzugsweise zwischen 14° und 18°, und noch bevorzugter zwischen 14° und 16° beträgt.
  9. Kettensäge (1) nach einem der vorhergehenden Ansprüche, wobei ein hinteres Ende des Steuerungsteils (3) mit einem Gehäuseteil (12) an einem äußeren Oberflächenteil davon verbunden ist, der eine Stützfläche (13) zur Aufnahme des Handballens definiert, und wobei der Gehäuseteil (12) einen Vergaser oder eine Batterie darin aufnimmt.
  10. Kettensäge (1) nach einem der vorhergehenden Ansprüche, wobei der Steuerungsteil (3) eine zweite Längsachse (17) definiert, die sich, in einer Seitenansicht gesehen, im Wesentlichen entlang einer Oberseite zumindest eines Teils des Steuerungsteils (3) erstreckt, und wobei die Stützfläche (13) eine Ebene (18) definiert, und die Ebene (18) einen Winkel B mit der zweiten Längsachse (17) bildet, und wobei B zwischen 105° und 145°, vorzugsweise zwischen 110° und 140°, und noch bevorzugter zwischen 113° und 135° beträgt, jeweils in einer Seitenansicht gesehen.
  11. Kettensäge (1) nach Anspruch 10, wobei B zwischen 115° und 130°, vorzugsweise zwischen 117° und 127°, und noch bevorzugter zwischen 119° und 123° beträgt.
  12. Kettensäge (1) nach einem der Ansprüche 9-11, wobei die Stützfläche (13) sich zumindest 10 mm, vorzugsweise zumindest 16 mm, und noch bevorzugter zumindest 20 mm in einer Richtung nach rechts in Bezug auf einen am weitesten rechts liegenden Teil des hinteren Endes der rechten Seite (5) des Steuerungsteils (3) erstreckt.
  13. Kettensäge (1) nach einem der vorhergehenden Ansprüche, wobei der Handgriffabschnitt (2) relativ zu einem Kettensägenkörperteil (24) vibrationsgedämpft ist, wobei der Körperteil (24) die Antriebseinheit (25) umfasst, und wobei die Antriebseinheit (25) einen Verbrennungsmotor umfasst.
EP11190338.1A 2009-05-11 2009-05-11 Kettensägenanordnung Active EP2422945B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES11190338.1T ES2616575T3 (es) 2009-05-11 2009-05-11 Disposición de motosierra
EP11190338.1A EP2422945B1 (de) 2009-05-11 2009-05-11 Kettensägenanordnung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11190338.1A EP2422945B1 (de) 2009-05-11 2009-05-11 Kettensägenanordnung
EP09844710.5A EP2429784A4 (de) 2009-05-11 2009-05-11 Kettensägenanordnung

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP09844710.5 Division 2009-05-11
EP09844710.5A Division EP2429784A4 (de) 2009-05-11 2009-05-11 Kettensägenanordnung

Publications (2)

Publication Number Publication Date
EP2422945A1 EP2422945A1 (de) 2012-02-29
EP2422945B1 true EP2422945B1 (de) 2016-12-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11190338.1A Active EP2422945B1 (de) 2009-05-11 2009-05-11 Kettensägenanordnung

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120055034A1 (en) * 2009-05-11 2012-03-08 Husqvarna Ab Chainsaw arrangement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1184137A2 (de) * 2000-08-30 2002-03-06 Felo-Werkzeugfabrik Holland-Letz Gmbh Griffsatz für Hand- oder Gartenwerkzeuge
DE202004000140U1 (de) * 2003-12-09 2005-05-04 Felo-Werkzeugfabrik Holland-Letz Gmbh Griffsatz für ein Hand- und Gartenwerkzeug
EP1541294A1 (de) * 2003-12-09 2005-06-15 Felo Werkzeugfabrik Holland-Letz Gmbh Griffsatz für Hand- und Gartenwerkzeuge

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2003918A1 (de) * 1970-01-29 1971-08-05 Zuendapp Werke Gmbh Motorkettensaege
DE3935361C2 (de) 1989-10-24 1998-12-24 Stihl Maschf Andreas Arbeitsgerät wie Motorkettensäge oder dgl., insbesondere Einhandkettensäge
DE20104536U1 (de) * 2001-03-16 2001-05-23 Andreas Stihl AG & Co., 71336 Waiblingen Handgeführtes, tragbares Arbeitsgerät mit Daumenstützen
EP1614513A1 (de) * 2004-07-05 2006-01-11 Aktiebolaget Electrolux Durch einen Motor angetriebenes, tragbares und handgeführtes Arbeitsgerät
DE202005015199U1 (de) * 2005-09-26 2005-12-29 Dolmar Gmbh Arbeitsgerät mit einem Handgriff, insbesondere Heckenschere

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1184137A2 (de) * 2000-08-30 2002-03-06 Felo-Werkzeugfabrik Holland-Letz Gmbh Griffsatz für Hand- oder Gartenwerkzeuge
DE202004000140U1 (de) * 2003-12-09 2005-05-04 Felo-Werkzeugfabrik Holland-Letz Gmbh Griffsatz für ein Hand- und Gartenwerkzeug
EP1541294A1 (de) * 2003-12-09 2005-06-15 Felo Werkzeugfabrik Holland-Letz Gmbh Griffsatz für Hand- und Gartenwerkzeuge

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