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WO2011113445A1 - Outils - Google Patents

Outils Download PDF

Info

Publication number
WO2011113445A1
WO2011113445A1 PCT/EP2010/001676 EP2010001676W WO2011113445A1 WO 2011113445 A1 WO2011113445 A1 WO 2011113445A1 EP 2010001676 W EP2010001676 W EP 2010001676W WO 2011113445 A1 WO2011113445 A1 WO 2011113445A1
Authority
WO
WIPO (PCT)
Prior art keywords
handle
battery
housing part
axis
blades
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.)
Ceased
Application number
PCT/EP2010/001676
Other languages
English (en)
Inventor
Johan BJÖRNLINGER
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 PCT/EP2010/001676 priority Critical patent/WO2011113445A1/fr
Publication of WO2011113445A1 publication Critical patent/WO2011113445A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/04—Apparatus for trimming hedges, e.g. hedge shears
    • A01G3/047—Apparatus for trimming hedges, e.g. hedge shears portable
    • A01G3/053—Apparatus for trimming hedges, e.g. hedge shears portable motor-driven

Definitions

  • This invention relates to battery-powered portable tools.
  • Battery-operated portable tools are becoming more and more popular, as they allow a user to operate a power tool away from a fixed source of electricity.
  • Hedge trimmers can be provided as such battery-operated portable tools; a pair of elongate blades is provided, each carrying rows of cutting teeth along their opposing long edges, with one blade or both blades oscillating relative to the other in a reciprocating motion when driven by an electric motor powered by a battery. As the teeth of the blades move spaces between the teeth open and close and any hedge material caught in ⁇ the spaces is cut as the spaces close up.
  • Such devices can be quite heavy and so two handles are provided for the user; one close to the blades and one further away so that the centre of gravity of the trimmer lies between the handles.
  • the forward handle can then be used to take the weight of the trimmer and the rear handle moved around to cause the blades to sweep through an arc across the hedge.
  • a battery- powered portable hedge trimmer comprising a pair of elongate cutting blades each having a long axis and teeth extending away from the axis on opposing sides of the axis,
  • a two part housing which comprises:
  • a first housing part that accommodates a motor that is connected to at least one of the blades to cause the blade, in use, to reciprocate along its length, a forward handle being fixed relative to the first housing part, and a second housing part that include a battery receiving means arranged to receive a battery pack comprising a battery arranged to provide electrical power in order to drive the motor, a rearward handle being fixed relative to the second hosing part, and
  • connection mechanism which connects the second housing part to the first such that the second hosing part can be rotated from side to side relative to the first housing part in a plane orthogonal to the long axis of the blades between a first position in which the rearward handle is orthogonal to the plane containing both the axis of the cutting blade and the two rows of teeth, and a second position in which the rearward handle is inclined at a non-zero angle relative to the first position.
  • both the battery pack and rearward handle being fixed to the second part so they can be tilted together from side to side relative to the front housing part, a comfortable working position can be achieved for use of the trimmer at a range of angles.
  • connection mechanism may comprise a pivot joint which enables the rearward handle and the second housing part to rotate about an axis that is parallel to the axis of the blades, and most preferably is substantially coincident with the axis of the blades.
  • the rearward handle In the second position the rearward handle may be inclined at an angle of substantially 90 degrees relative to the first position so that the rearward handle lies in the plane of the cutting blades.
  • the first position may be such that with the blade in a horizontal plane and the two sets of teeth facing to the right and left of the horizontal axis - respectively the handle lies in a vertical plane. Where the rearward handle has a pistol style grip this would place the grip in an upright, vertical, position.
  • the handle will have a certain thickness or width and as such the term "lies in a plane" should be construed in a practical sense.
  • the position of the handle may be conveniently defined relative to an axis of symmetry that runs through the centre of the handle in line with the axis of the blade when the handle is in the first position.
  • the plane in that sense is then the plane in which that axis lies.
  • the rearward handle may be moved to a third position in which the handle is inclined at a non-zero angle relative to the first position by moving the handle in the opposite direction to that needed to move it to the second position. For instance, the handle may be rotated clockwise to move to the second position, or anti-clockwise to move to the first position.
  • the second and third position may be 90 degrees out of line with the first position, albeit in opposing directions.
  • the grip would be horizontal in either of those position (and vertical in the first position). More likely the grip would remain held upright and the blade would then be twisted 90 degrees from its original position so one set of teeth point up and the others down.
  • the rearward handle may be free to move through a full 360 degrees so it can adopt any angle relative to the first position.
  • the rearward handle may be C-shaped, with a hand grip portion formed thereon. It may be an integral part of the second housing. Importantly the rearward handle and the second housing part should move together so that the battery pack (when attached) does not move relative to the rearward handle.
  • the forward handle may also be C-shaped and may be provided with a hand grip approximately midway between the ends of the handle, the handle being aligned so that the handgrip is orthogonal to the axis of the blades and offset there from as is known in the art.
  • a protective shield may be provided which is located between the grip part of the forward handle and the blades to stop debris thrown from the blades coming into contact with the user when gripping the forward handle.
  • the forward handle may be fixed to the first housing portion so that it does not move relative to the first housing portion.
  • the second housing part may be connected to the first housing part by a pivot joint which facilitates the required movement between the first position and second (or third position) by rotation. It may comprise a ball and socket.
  • the pivot joint may include an axis of rotation that is aligned with the axis of the cutting blades. It may prevent tilting and only permit pure rotational movement of the handle from side to side.
  • Electrical connection from the battery pack to the motor in the first housing part may be provided by one or more cables that extend through the pivot joint or in any other manner.
  • the centre of gravity of the first part and the second part may be chosen to lie on the axis that extends between the hand grips of the forward and rearward handles.
  • the mass may be arranged such that the axis that connects the handles passes through the battery pack (when connected). This helps ensure that as the rearward handle rotates with the second housing part the moment of inertia of the trimmer does not change too much, since the battery is generally one of the heaviest parts.
  • the axis should also pass through the motor as this is another heavy part of the device.
  • the trimmer may be arranged such that in any position the moment of inertia remains substantially the same when measured for rotation about an axis that connects the front handle and the rear handle. This enables the device to be easy and predictable to handle. As this depends on the mass of the battery pack and the distribution of that mass the invention may provide in a second aspect a combination of a trimmer of the first aspect and a battery pack in which the centre of gravity of the trimmer and battery pack lies between the forward and rearward handles and in which the moment of inertia of the trimmer and battery pack is substantially constant for all relative positions of the first housing portion and second housing portion permitted by connection means.
  • a latch may be provided which prevents movement of the second housing part relative to the first housing part until it is released. The latch may also prevent the motor operating when it is in the released state.
  • a method of using a battery-operated power tool according to the first aspect of the invention comprising moving the rearward handle to a desired position relative to the forwards handle.
  • Figure 1 shows a hedge trimmer according to a first embodiment of the invention from the side with the second housing part and an attached rearward handle in a first position and a battery pack fitted
  • Figure 2 shows the hedge trimmer of Figure 1 in the same position but viewed from above;
  • Figure 3 is a perspective view from the rear and to one side with the rearward handle having been moved to a second position;
  • Figure 4 is an enlarged view of only the rear handle of the second housing part of the trimmer.
  • a battery-operated hedge trimmer 100 is shown in Figure 1 of the accompanying drawings.
  • the trimmer comprises a pair of elongate cutting blades 1 10, 120 each having a long axis 130 terminating at a first end and a second end.
  • the blades lie in a horizontal plane.
  • a two part housing 130, 140 is provided which comprises a first housing part 130 that accommodates a motor (not shown) that is connected to the first end of at least one of the blades 1 10.
  • the motor drives a drive mechanism (also not shown) in a manner known in the art that is secured to one of the blades so that rotation of the motor causes the blade, in use, to reciprocate along its axial length.
  • the two part housing also includes a second housing part 140 which includes a battery receiving means; in this case a cavity 145 which is sized to receive a battery pack 146 comprising a battery arranged to provide electrical power in order to drive the motor.
  • the weight of the motor and battery pack is therefore split between the two housing parts. Electrical connection is provided between the first and second housing parts 130, 140.
  • Each housing part 130,140 is provided with a respective handle enabling a user to hold the trimmer in two hands.
  • the relative weights of the blades, motor, battery pack, handles and other parts are such that the centre of gravity sits between the two handles, and as close as possible to an axis that extends between the centre of the grip part of each handle. This makes the tool natural to hold and easy to balance.
  • a forward handle 160 is fixed relative to the first housing part, and a rearward handle 170 is fixed relative to the second housing part.
  • the forward handle 160 comprises a loop defining a central grip portion 165 which extends in a plane orthogonal to the long axis of the blades and will typically be used to take the- weight of the trimmer.
  • the forward handle might in general be C-shaped and being provided with a hand grip approximately midway between the ends of the handle, preferably along the whole C-shaped section of the handle.
  • the rearward handle 170 also comprises a loop which defines a grip portion in the form of a pistol grip 175 and a trigger 176.
  • a further switch 178 is located on top of the pistol grip.
  • the trigger 176 can be depressed and by pressing down on the further switch 178 the motor can be started (both need to be pressed to start the motor), and when one or both of the trigger 176 and further switch 178 are released the motor is stopped.
  • This grip can be held in the hand and used to control the direction of movement of the blades around the hand holding the forward handle. Such a movement is quite natural to a user of the tool.
  • the first and second parts of the housing 130,140 are connected by an attachment mechanism 150 comprising a pivot joint.
  • This joint enables the second part 140 to rotate from side to side relative to the first part in a plane orthogonal to the plane containing the axis of the cutting blades which is fixed relative the first housing part.
  • the rearward handle 170 can therefore be moved, or tilted, from side to side. As it moves the second housing part 140 and the battery pack moves with it, and so the whole of the mass of the second housing part and attached battery pack remain in a fixed relationship relative to the rearward handle 170.
  • the centre of mass of the battery pack and the motor and the blades is preferably arranged as close as possible to a common axis aligned with the long axis of the blades. This ensures that the moment of inertia of the trimmer as the blades are moved around is kept low, reducing fatigue of the user.
  • the position of the batter pack relative to this axis may be chosen and so that regardless of the relative positions of the forward and rearward handles the moment of inertia of the trimmer remains consistent, at least in relation to movement relative to the rearward handle which will generally be used to steer the movement of the trimmer.
  • Figure 4 is an enlarged view of only the handle part of the second housing part 140.
  • a latch 180 is provided on the second housing part 140 which is arranged such that the user requires two hands to release the latch 180 and move the second housing part relative to the first housing part. Typically the user would release the latch 180 with one hand whilst holding the forward handle 160 with the other hand and using the same hand that has released the latch 180 move the rearward handle 170 relative to the forward handle 160.
  • the latch is released again the second housing part is locked in position relative to the first housing part. Additionally the motor may be disabled when the latch is released.
  • the handle can also be moved in the other direction if desired so that the blade will be the other way up through 90 degrees. This would provide an arrangement which is an approximate mirror image of that shown in Figure 3.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)

Abstract

La présente invention concerne un taille-haie portatif alimenté par pile (100), qui comprend une paire de lames de coupe allongées (110,120) présentant chacune un axe de longueur et deux rangées de dents s'étendant à partir de l'axe dans des directions opposées, sur chaque côté de l'axe. L'invention porte également sur un boîtier en deux parties (130, 140) qui comprend les éléments suivants : une première partie de boîtier (130), qui accueille un moteur relié à au moins l'une des lames, ce qui entraîne un mouvement de va-et-vient de la lame sur sa longueur lors de l'utilisation, une poignée vers l'avant (160) étant fixe par rapport à la première partie de boîtier; et une seconde partie de boîtier (140), qui comprend des moyens d'accueil de pile disposés de manière à accueillir un bloc-pile comprenant une pile conçue pour procurer de l'énergie électrique afin d'entraîner le moteur, une poignée vers l'arrière (170) étant fixe par rapport à la seconde partie de boîtier. Un élément de liaison pivot (150) relie la seconde partie de boîtier à la première, de sorte que la seconde partie de boîtier (140) puisse être mise en rotation d'un côté vers l'autre sur un plan orthogonal à l'axe de la longueur des lames, entre une première position dans laquelle la poignée vers l'arrière est orthogonale au plan contenant à la fois l'axe de la lame de coupe et les deux rangées de dents, et une seconde position dans laquelle la poignée vers l'arrière est inclinée à un angle non égal à zéro par rapport à la première position.
PCT/EP2010/001676 2010-03-17 2010-03-17 Outils Ceased WO2011113445A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2010/001676 WO2011113445A1 (fr) 2010-03-17 2010-03-17 Outils

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2010/001676 WO2011113445A1 (fr) 2010-03-17 2010-03-17 Outils

Publications (1)

Publication Number Publication Date
WO2011113445A1 true WO2011113445A1 (fr) 2011-09-22

Family

ID=43244267

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/001676 Ceased WO2011113445A1 (fr) 2010-03-17 2010-03-17 Outils

Country Status (1)

Country Link
WO (1) WO2011113445A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102554882A (zh) * 2012-02-28 2012-07-11 南京德朔实业有限公司 手持式工具
CN102742460A (zh) * 2012-08-03 2012-10-24 江苏苏美达五金工具有限公司 一种电动绿篱修剪机
EP2606717A1 (fr) * 2011-12-22 2013-06-26 Black & Decker Inc. Dispositif de coupe de végétation
EP2963697A1 (fr) 2014-06-30 2016-01-06 Novaled GmbH Matériau semi-conducteur organique dopé électriquement et dispositif électroluminescent organique le comprenant
EP3162190A1 (fr) * 2015-09-15 2017-05-03 Chervon (HK) Limited Taille-haie
JP2021058139A (ja) * 2019-10-07 2021-04-15 株式会社マキタ ヘッジトリマ
US11844317B2 (en) 2019-10-07 2023-12-19 Makita Corporation Hedge trimmer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5809653A (en) * 1994-09-09 1998-09-22 Ryobi North America, Inc. Attachment system for battery powered tool
US5867910A (en) * 1997-01-07 1999-02-09 Kioritz Corporation Control for portable power tool
FR2882625A1 (fr) * 2005-03-03 2006-09-08 Garden Depot Sarl Taille-haie equipe d'une partie arriere pivotante
WO2006134749A2 (fr) * 2005-06-13 2006-12-21 Shindaiwa Kogyo Co., Ltd. Outil a main electrique
EP1738638A1 (fr) * 2005-06-30 2007-01-03 Black & Decker, Inc. Taille-haie portable avec tête rotative
DE202006009818U1 (de) * 2006-06-21 2007-10-25 Dolmar Gmbh Steckrahmen für Heckenscheren
WO2008029255A2 (fr) * 2006-09-05 2008-03-13 Senson Investments Limited Outil mécanique portatif
DE202009014315U1 (de) * 2008-10-27 2010-02-25 Chervon Ltd., Wanchai Kraftwerkzeug mit einem drehbaren Arbeitskopf

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5809653A (en) * 1994-09-09 1998-09-22 Ryobi North America, Inc. Attachment system for battery powered tool
US5867910A (en) * 1997-01-07 1999-02-09 Kioritz Corporation Control for portable power tool
FR2882625A1 (fr) * 2005-03-03 2006-09-08 Garden Depot Sarl Taille-haie equipe d'une partie arriere pivotante
WO2006134749A2 (fr) * 2005-06-13 2006-12-21 Shindaiwa Kogyo Co., Ltd. Outil a main electrique
EP1738638A1 (fr) * 2005-06-30 2007-01-03 Black & Decker, Inc. Taille-haie portable avec tête rotative
DE202006009818U1 (de) * 2006-06-21 2007-10-25 Dolmar Gmbh Steckrahmen für Heckenscheren
WO2008029255A2 (fr) * 2006-09-05 2008-03-13 Senson Investments Limited Outil mécanique portatif
DE202009014315U1 (de) * 2008-10-27 2010-02-25 Chervon Ltd., Wanchai Kraftwerkzeug mit einem drehbaren Arbeitskopf

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2606717A1 (fr) * 2011-12-22 2013-06-26 Black & Decker Inc. Dispositif de coupe de végétation
CN102554882A (zh) * 2012-02-28 2012-07-11 南京德朔实业有限公司 手持式工具
CN102554882B (zh) * 2012-02-28 2015-08-12 南京德朔实业有限公司 手持式工具
CN102742460A (zh) * 2012-08-03 2012-10-24 江苏苏美达五金工具有限公司 一种电动绿篱修剪机
EP2963697A1 (fr) 2014-06-30 2016-01-06 Novaled GmbH Matériau semi-conducteur organique dopé électriquement et dispositif électroluminescent organique le comprenant
EP3162190A1 (fr) * 2015-09-15 2017-05-03 Chervon (HK) Limited Taille-haie
JP2021058139A (ja) * 2019-10-07 2021-04-15 株式会社マキタ ヘッジトリマ
JP7295773B2 (ja) 2019-10-07 2023-06-21 株式会社マキタ ヘッジトリマ
US11844317B2 (en) 2019-10-07 2023-12-19 Makita Corporation Hedge trimmer

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