EP2334162A2 - Coupe-bordures - Google Patents

Coupe-bordures

Info

Publication number
EP2334162A2
EP2334162A2 EP09777722A EP09777722A EP2334162A2 EP 2334162 A2 EP2334162 A2 EP 2334162A2 EP 09777722 A EP09777722 A EP 09777722A EP 09777722 A EP09777722 A EP 09777722A EP 2334162 A2 EP2334162 A2 EP 2334162A2
Authority
EP
European Patent Office
Prior art keywords
axis
grass trimmer
cutting head
actuating element
trimmer according
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.)
Withdrawn
Application number
EP09777722A
Other languages
German (de)
English (en)
Inventor
Bernhard Besserer
Ottmar Locher
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
Gardena Manufacturing 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 Gardena Manufacturing GmbH filed Critical Gardena Manufacturing GmbH
Publication of EP2334162A2 publication Critical patent/EP2334162A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/835—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes
    • A01D34/84—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes for edges of lawns or fields, e.g. for mowing close to trees or walls
    • 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
    • A01G3/06—Hand-held edge trimmers or shears for lawns

Definitions

  • the invention relates to a trimmer with a cutting head, a guide stem and a hinge assembly comprising a first and a second axis, wherein the cutting head is pivotable relative to the guide stem about the first axis between at least a first and a second tilt position and the cutting head relative to the Guide stem about the second axis between an edge cutting position and a trim position is pivotable.
  • a grass trimmer hand-held by means of a guide handle garden cutting device which has on a cutting head one or more rotating cutting tools, in particular radially outwardly pointing knife blades, or at least one mowing thread.
  • a thread cutter with a double joint arrangement is known, for example, from WO 2005/009110.
  • the double joint arrangement has a first axis and a second axis.
  • the first axis intersects the axis of the guide stem vertically and allows a tilting movement to adjust a tilt position of the cutting unit or Cutting head opposite the guide shaft.
  • the cutting head may be further pivoted about a second axis between the trim position and a vertical cutting position or edge cutting position.
  • edging position also referred to as edging position, laterally protruding plant parts can be trimmed.
  • the cutting unit can be fixed in different pan and / or tilt positions, with a fixation in unneeded and / or in view of possible risk of injury not suitable inclination and / or pivot positions is prevented.
  • several handles may be necessary to arrange the cutting unit relative to the guide stem so that a fixation is possible.
  • a grass trimmer having a cutting head, a guide stem and a joint arrangement, comprising a first and a second axis, wherein the cutting head is pivotable relative to the guide stem about the first axis between at least a first and a second tilt position, the cutting head relative is pivoted to the guide shaft about the second axis between an edge cutting position and a trim position and the hinge assembly comprises pivot locking means, which is locked in the first tilt position pivoting of the cutting head about the second axis between the trim position and the edge cutting position and / or by which in the Edge cutting position a pivoting of the cutting head is locked around the first axis
  • the cutting head can be adjusted by the hinge assembly relative to the guide shaft for various tasks.
  • the first axis for a pivoting movement for adjusting an inclination angle is preferably substantially parallel to a plane perpendicular to a longitudinal axis of the guide shaft. In one embodiment, the first axis lies in this plane.
  • an angle at which the guide post protrudes in use of the cutting head may be defined, for example, between the guide shaft and a plane in which a cutting line or a cutting blade circulates.
  • the tilt position and / or the cutting position can each be fixed by suitable means.
  • pivot locking means prevents the cutting head can occupy inadmissible positions relative to the guide stem, which would have to be corrected before re-fixing the cutting head on the guide stem - as usual in the art - and / or which could pose a potential risk.
  • the pivot locking means are preferably designed so that they can not be bypassed by a user non-destructive. In other words, in one embodiment, a release of the pivot locking means and thus a switch to the edge cutting position is possible only by pivoting from the first tilt position into a deviating second inclination position.
  • pivoting about the first axis is blocked by the pivot locking means in the edge cutting position.
  • different inclination positions of the cutting head relative to the guide post may be advantageous.
  • a change in the angle of inclination for safety reasons is not desirable.
  • Pivoting locking means are provided according to the invention, which preferably can not be bypassed without destruction.
  • the first axis is arranged substantially horizontally in a position of use.
  • a corresponding axis has proved to be particularly advantageous for setting a tilt position.
  • the first and the second axis are arranged at a distance from the joint arrangement in the direction of the guide stem, wherein the first axis is arranged on a side facing away from the guide stem and the second axis on a side facing the guide stem.
  • the arrangement is advantageous for ergonomic and / or structural reasons.
  • the first axis is formed by a fork which engages around the cutting head and is operatively connected to the guide shaft.
  • the cutting head usually comprises in addition to the cutting device and a motor or the like, which is mounted with the cutting device in a common housing.
  • the cutting head thus has a significant share of a total weight of the grass trimmer.
  • the pivot locking means preferably comprise a first actuating element, which cooperates with a locking structure provided on the cutting head for determining a tilt position.
  • the actuating element is therefore also locking element.
  • the latching structure is provided in one embodiment on a housing of the cutting head.
  • the actuating element may be arranged centrally in order to achieve a uniform load distribution.
  • the first actuating element is force-loaded, in particular spring-loaded.
  • the actuating element is held in a detent position by means of an acting constraining force, preferably a spring force, wherein for pivoting an adjustment of the actuating element takes place against the constraining force.
  • the actuating element is designed as a slide, lever, rocker or the like, in particular as a spring-loaded slide or the like.
  • a slider is referred to as an element which is displaced to an actuation, i. performs a movement along a guideway, preferably a linear guideway.
  • Such slides can be realized particularly cost-effective and robust.
  • elements are referred to, which are pivoted for actuation.
  • the actuating element in the first inclination position locked to the latching structure such that the actuating element prevents pivoting from the trim position in the edge cutting position.
  • the actuator for adjusting the tilt position is used directly as a blocking element of the pivot locking means and the number of moving parts on the trimmer lawn is thus kept as low as possible.
  • the angle of inclination is fixed by the actuating element, whereas pivoting about the second axis is not blocked by the actuating element.
  • the actuating element is at least partially guided in a groove with a first, the cutting head portion associated, and a second, the guide stem associated portion, wherein the first and the second portion arranged in alignment in the trim position are such that the actuating element for pivoting about the first axis in the groove is displaceable, and the first and the second portion are not aligned in the edge cutting position, so that a displacement of the actuating element for pivoting about the first axis is locked.
  • the pivoting about the first axis when setting the edge cutting position is locked without additional manipulations.
  • the second axis encloses an angle in the range of approximately 30 ° to approximately 60 °, preferably approximately 45 °, with a longitudinal axis of the guide stem.
  • the second axis is coaxial with a central surface normal on two mutually sliding surfaces in a guide shaft intersecting inclined plane.
  • An associated with the second axis joint is realized in one embodiment by a spar, which is arranged coaxially with the guide stem to this subsequently.
  • the mutually facing sides of the guide stem are inclined with respect to the longitudinal axis of the guide stem.
  • a second actuating element for fixing the trim position or the edge cutting position is provided.
  • the second actuating element can also be designed as a slide.
  • the second actuating element is designed as a rocker with an actuatable by applying a compressive force element.
  • the second actuating element is arranged on the guide stem and cooperates with the suspension of the cutting head, for example with the fork.
  • a wheel arrangement for a wheel support in the trim position and / or the edge cutting position is arranged on the guide stem, in particular arranged pivotably.
  • the wheel assembly is preferably without tools by latching means or the like with the guide stem connected as needed.
  • the wheel assembly can be placed either in a position of use or in a voltage applied to the guide handle stowage position.
  • the wheel assembly has a curved strut, wherein the curvature is configured so that the strut is disposed in a use position outside a pivot radius of the cutting head when adjusting about the first and / or the second axis.
  • the cutting head can be pivoted so without additional adjustment of the wheel assembly between the trim position and the edge cutting position.
  • Fig. 1 a schematic side view of an inventive
  • FIG. 2 shows a schematic side view of the grass trimmer according to FIG. 1 in a second position of use
  • FIG. 3 is a schematic side view of the grass trimmer according to FIG. 1 in a third position of use;
  • FIG. 4 shows a schematic side view of the grass trimmer according to FIG. 1 in a fourth position of use
  • FIG. 5 shows the grass trimmer according to FIG. 1 during pivoting between the third and the fourth use position
  • FIG. 6 shows a partially cut detail view of a first pivot lock according to the invention
  • Fig. 7 a partially sectioned detail of the first
  • FIGS. 1 to 4 schematically show a grass trimmer 1 according to the invention in different positions of use.
  • the illustrated grass trimmer 1 comprises a cutting head 2 and a guide stem 3, which are connected to one another via a joint arrangement 4.
  • a wheel assembly 5 is pivotally mounted in the illustrated embodiment.
  • 1 shows the grass trimmer 1 in a first position, which is referred to as "free cutting.”
  • Fig. 2 shows the grass trimmer 1 in a second position, which is similar to the position shown in Fig. 1, but with the wheel assembly 5 assisting the user in cutting.
  • Fig. 3 shows the trimmer 1 in a flat position, which is suitable for example for cutting under an obstacle, not shown, or the like.
  • FIG. 4 shows the trimmer in a so-called edge cutting position, wherein the cutting head 1 is brought into a vertical position.
  • Fig. 5 shows schematically a rotation of the cutting head from the trim position shown in FIGS. 1 to 3 in the illustrated in Fig. 4 edge cutting position.
  • the cutting head 2 comprises a housing 20, in which a non-visible motor for rotating drive of a mowing thread, not shown, is mounted about an axis of rotation 24. On the housing 20, a protective cover 25 is preferably provided.
  • a plane in which the cutting thread or another cutting tool rotates is referred to as the cutting plane S.
  • the illustrated hinge assembly 4 an adjustment of an inclination angle ⁇ between the guide shaft 3 and the cutting plane S is possible.
  • the guide stem 3 and the cutting plane S in the inclined position shown in Fig. 3 are substantially parallel, so that the included angle ⁇ is about 0 °.
  • the hinge assembly 4 further allows pivoting of the cutting head 2 relative to the guide shaft 3 for a change between a trim position, in which cutting substantially parallel to the ground, and an edge cutting position shown in Fig. 4, in which the cutting plane S substantially is arranged vertically.
  • the joint assembly 4 comprises for this purpose a first axis 40 which is provided on a fork 41, wherein the cutting head 2 is arranged pivotable about the first axis 40 relative to the fork 41 for adjusting the inclination angle ⁇ .
  • the first axis 40 is arranged substantially horizontally in the illustrated positions of use.
  • the hinge assembly 4 further comprises a spar 42, which is in one piece is formed with the fork 41, wherein the guide shaft 3 is pivotable relative to the spar 42 about a second axis 44 between the trim position and the edge cutting position.
  • the cutting head 2 is locked by the housing 20 - as shown in FIGS. 1 to 3 - in three inclination positions with the fork 41.
  • the housing 20 has for this purpose a latching structure with three locking grooves 21, 22, 23.
  • the locking grooves 21 to 23 are partially hidden in the figures.
  • a trained as a slide actuator 43 (visible in FIGS. 4 and 5) is provided on the fork 41, which can engage in the locking grooves 21 to 23.
  • the slider 43 is held by a provided in the fork 41, not visible in Fig. 1 to 5, spring in one of the locking grooves 21 to 23 by the spring force. To adjust the tilt position of the slider 43 is moved against the force of the spring by a user and locked in another locking groove 21 to 23.
  • the hinge assembly 4 further comprises an axis 44 about which the cutting head 2 relative to the guide shaft 3 between the trim position shown in FIGS. 1 to 3 and the edge cutting position shown in FIG. 4 pivotally has.
  • the spar 42 is pivotable relative to the guide shaft 3 about the second axis 44.
  • the guide stem 3 and the spar 42 have for this purpose mutually facing parallel surfaces, which lie in a plane shown schematically in Fig. 3 E, which is inclined relative to the guide stem 3.
  • a longitudinal axis L of the guide stem preferably includes an angle ⁇ of approximately 135 ° with the plane E, as shown schematically in FIG.
  • the second axis 44 is perpendicular to the plane E.
  • the bar 42 and the guide stem 3 are coaxial.
  • the bar 42 and the guide stem 3 are coaxial.
  • By pivoting about the second axis 44 of the spar 42 and thus the cutting head. 2 Angled relative to the guide shaft 3. 5 shows the pivoting process about the second axis 44. A pivoting about the second axis 44 is locked without the intervention of the user.
  • an actuating element 45 is provided.
  • the two possible relative positions between spar 42 and guide stem 3 are highlighted by optical means, such as arrows.
  • the illustrated wheel arrangement 5 is arranged pivotably about a pivot axis 50 on the guide shaft 3.
  • the wheel assembly 5 comprises one or more struts 51, preferably two struts 51, wherein a free end of the struts 51, a roller, a wheel 52 or a plurality of rollers or wheels 52 are arranged.
  • the struts 51 of the wheel assembly 5 are preferably arranged symmetrically to the guide shaft 3 and curved so that - as seen in Figure 5 - a pivoting about the second axis 44 is possible while the wheel assembly 5 is unfolded, i. gets up on the ground. This can increase the safety when pivoting.
  • pivot locking means by which a pivoting of the cutting head 2 is locked in the tilt positions shown in FIGS. 1 and 2 about the second axis 44 between the trim position and the edge cutting position.
  • a pivoting about the second axis 44 is thus possible in the illustrated embodiment, only in the third tilt position shown in Fig. 3.
  • further pivoting of the cutting head 2 about the first axis 40 is blocked by the pivot locking means in the edge cutting position shown in Fig. 4.
  • 6 and 7 show partially sectioned detail views of the pivot locking means according to the invention.
  • the latching grooves 21, 22 have a smaller depth than the latching groove 23.
  • An end 430 of the slide 43 facing away from the latching grooves 21, 22, 23 blocks pivoting about the axis 44 when the slide 43 is locked in one of the locking grooves 21 or 22. Only when the slider 43 engages in the deeper locking groove 23, a pivoting about the second axis 44 is released.
  • the slider 43 is loaded by a spring 46, which forces the slider in the locking grooves 21 to 23. To adjust the inclination of the slider 43 is moved against the force of the spring 46. However, the pivoting about the second axis 44 remains blocked even after the release by the slider 43, that is, after a positioning of the slider 43 in the third locking groove 23, so that use in the tilt position shown in Fig. 3 is possible.
  • rocker 45 For pivoting about the second axis 44 designed as a rocker 45 second actuator is provided.
  • the rocker 45 is movable against the force of a second spring 47 by a user, so that a spring 47 facing away from the end 450 of the rocker 45 from a schematically indicated in Fig. 7 associated recess 421 on the spar 42 is guided.
  • two recesses 421 are provided in the illustrated embodiment, which allows latching of the rocker 45 in two relative positions between the bar 42 and the guide shaft 3.
  • a rotational adjustment for a vertical section (also referred to as edging function) can only be switched if the inclination is set such that the guide post 3 is in the horizontal position shown in FIG.
  • the slider 43 is displaceable along a groove with a first groove portion 48a assigned to the spar 42 and a second groove portion 48b assigned to the guide stem 3 for changing the inclination position.
  • the groove sections 48a, 48b are associated with two hinge parts pivotable about the axis 44 relative to each other. In the trim position shown in Fig. 6, the groove portions 48a, 48b are arranged in alignment.
  • a cable guide of a power cable 31 for a power supply of a motor arranged in the cutting head 2 is preferably as shown within the beam 42 and the fork 41 possible.
  • the handle 30 and / or in the spar 42 can not be provided for the power cable 31, not shown strain relief.

Landscapes

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

Abstract

L'invention concerne un coupe-bordures équipé d'une tête de coupe (2), d'un manche (3) et d'un système d'articulation (4) comprenant un premier (40) et un second axe (44), la tête de coupe (2) pouvant pivoter par rapport au manche (3) autour du premier axe (40) entre au moins une première et une deuxième position d'inclinaison et autour du second axe (44) entre une position de coupe de bordures et une position de taille. Le système d'articulation (4) comprend des moyens de blocage de pivotement permettant d'empêcher dans la première position d'inclinaison un pivotement de la tête de coupe (2) autour du second axe (44) entre la position de taille et la position de coupe de bordures, et/ou dans la position de coupe de bordures un pivotement de la tête de coupe (2) autour du premier axe (40).
EP09777722A 2008-08-26 2009-08-07 Coupe-bordures Withdrawn EP2334162A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810045912 DE102008045912A1 (de) 2008-08-26 2008-08-26 Rasentrimmer
PCT/EP2009/005726 WO2010025803A2 (fr) 2008-08-26 2009-08-07 Coupe-bordures

Publications (1)

Publication Number Publication Date
EP2334162A2 true EP2334162A2 (fr) 2011-06-22

Family

ID=41591645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09777722A Withdrawn EP2334162A2 (fr) 2008-08-26 2009-08-07 Coupe-bordures

Country Status (3)

Country Link
EP (1) EP2334162A2 (fr)
DE (1) DE102008045912A1 (fr)
WO (1) WO2010025803A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2510819A (en) * 2013-02-13 2014-08-20 Stanley Roy Adams One handed light weight grass trimmer

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103210739B (zh) * 2012-01-20 2016-05-18 苏州宝时得电动工具有限公司 动力切割工具
US10688647B2 (en) 2017-05-19 2020-06-23 The Toro Company Lawn and garden tool with boom having adjustable length and detachable boom sections
DE102018200436A1 (de) 2018-01-11 2019-07-11 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Lenkrad eines Kraftfahrzeugs
DE102018007190A1 (de) * 2018-09-11 2020-03-12 Willi Lipp Vorrichtung zur Wildkrautbeseitigung auf Wegen und Plätzen
CN111373946B (zh) * 2018-12-28 2022-01-04 南京德朔实业有限公司 打草机
CN109511399B (zh) * 2019-01-02 2024-05-14 苏州金莱克精密机械有限公司 一种机头可调节机构及手持电动工具和机头调节方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4442659A (en) * 1982-08-26 1984-04-17 Enbusk Henry J Dolly for lawn trimmer and combination thereof
US6260278B1 (en) * 1999-06-08 2001-07-17 Andy R. Faher Hand-held lawn and brush trimmer having manual trimmer head adjustment mechanisms
US6516598B1 (en) * 2000-11-10 2003-02-11 John A. Notaras Powered vegetative cutting device
DE10332918B4 (de) 2003-07-19 2007-02-01 Wolf-Geräte AG Gartengerät, insbesondere Fadenschneider

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010025803A3 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2510819A (en) * 2013-02-13 2014-08-20 Stanley Roy Adams One handed light weight grass trimmer

Also Published As

Publication number Publication date
WO2010025803A2 (fr) 2010-03-11
WO2010025803A3 (fr) 2011-12-29
DE102008045912A1 (de) 2010-03-04

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