EP2727877B1 - Hydraulic lawnmower lifting device with adjustable width - Google Patents

Hydraulic lawnmower lifting device with adjustable width Download PDF

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Publication number
EP2727877B1
EP2727877B1 EP13005205.3A EP13005205A EP2727877B1 EP 2727877 B1 EP2727877 B1 EP 2727877B1 EP 13005205 A EP13005205 A EP 13005205A EP 2727877 B1 EP2727877 B1 EP 2727877B1
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EP
European Patent Office
Prior art keywords
arm
wheel support
support
lifting
lifting device
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EP13005205.3A
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German (de)
French (fr)
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EP2727877A1 (en
EP2727877B8 (en
Inventor
Rémy BUSSON
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Garden Equipment
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FRANCE HAYON DEVELOPPEMENT
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Publication of EP2727877A1 publication Critical patent/EP2727877A1/en
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Publication of EP2727877B8 publication Critical patent/EP2727877B8/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F5/00—Mobile jacks of the garage type mounted on wheels or rollers
    • B66F5/04—Mobile jacks of the garage type mounted on wheels or rollers with fluid-pressure-operated lifting gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions

Definitions

  • the field of the invention is that of garden tools.
  • the invention relates to a mower lifting device, or self-propelled tractor, hydraulic force.
  • Lawn care is a particularly important point in the maintenance of green spaces.
  • Lawn mowers are currently the main lawn care tool. They can significantly reduce the workload of staff. In addition, once mowed the lawn is more homogeneous, more beautiful and more orderly.
  • a disadvantage of known lawn mowers for lifting an axle from a mower is that the lawn mower is unbalanced if the mower is not placed on the lawn mower symmetrically. Excessive movement of the mower's wheels on either side of the lawn mower may cause the lawn mower and mower to tilt or fall, which is particularly dangerous for a person working under the lawn mower. the lawnmower.
  • the invention therefore particularly aims to overcome the disadvantages of the state of the art mentioned above.
  • the invention aims to provide a lawn mower technique that can be used to lift any type of mower.
  • An object of the invention is also to provide a lawn mower technique that is simple to implement and can be used by a single person.
  • Another object of the invention is to provide such a technique which is of a reduced cost.
  • An object of the invention is also to provide a lawn mower that is easy to store, easy to transport.
  • Yet another object of the invention is to provide such a technique which is reliable.
  • a lifting device of a mower comprising a lifting arm movable about a substantially horizontal axis with respect to a fixed frame member between a storage position in which said lift arm extends substantially in the plane formed by said fixed frame member, and at least one raised position in which said lift arm is spaced apart from said frame member, said lift arm being actuated by a hydraulic cylinder secured to said fixed frame and carrying a removable tray adapted to receive wheels of the same axle of said mower, comprising a first wheel support extending from one side of said lifting arm and a second support of a wheel extending on the other side of said lifting arm, said wheel supports being slidably mounted relative to each other so as to be able to adjust the spacing between said pports.
  • said device has means for locking said first support with said second support and said lifting arm.
  • the invention proposes to provide a possibility of adjusting the spacing between the wheel supports, by means of sliding wheel supports, to adapt the lawn mower device to each mower .
  • the plate consisting of an assembly of two wheel supports is removable which facilitates the adjustment of the spacing between the wheel supports and the storage device lawn mower.
  • said first support has an arm slidably interlocking in an arm of said second support.
  • said locking means comprise a locking pin forming a key capable of being inserted in through passages of substantially identical contours formed in said first wheel support and in said second wheel support. and, at least partially, in a housing formed in said arm.
  • the first support is thus locked with the second support and the lift arm in a simple and effective manner.
  • the corresponding shape of the key locking shaft and through passages allows effective locking of the two wheel supports together.
  • said locking pin is oriented vertically when the first support is locked with the second support and the lifting arm.
  • the locking pin can be oriented horizontally when the first support is locked with the second support and the lift arm.
  • the contour of said through passages comprises a circular arc closed by a protrusion protruding out of the radius of said arc.
  • said protrusion is of substantially complementary shape of said key.
  • said housing is formed in a vertical plane of symmetry of said arm.
  • said first wheel support and said second wheel supports have a plurality of through-passages substantially aligned in the sliding direction of said supports, and substantially identical contours, and each of said substantially aligned through-passages of said first wheel support or said second wheel support.
  • wheel support is disposed in a different orientation than the other passages of said first wheel support or said second wheel support.
  • the distance between the end of said first wheel support farthest from said lifting arm and each of said through passages of said first wheel support is equal to the distance between the end of said second wheel support farthest from said arm of lifting and a passage opening from said second wheel support having an orientation identical to that of said passage opening from said first support when said wheel supports are slidably mounted relative to each other.
  • said arm of said first wheel support and said arm of said second wheel support are formed of a section of square section.
  • the arms of the wheel supports are tubes.
  • FIG. 1 a first embodiment of a device according to the invention of lifting lawn mower, and in particular a riding mower.
  • This lifting device 101 comprises a hoist 102 and a removable tray 103 comprising on its left a first wheel support 1 and on its right a second wheel support 4, mounted sliding relative to each other.
  • the lifting apparatus 102 comprises a fixed frame member 7, or base, equipped with front wheels 5 and rear wheels 10 on which is pivotally mounted a lifting arm 9. On the figure 1 the lifting arm 9 is in a raised position.
  • the lifting arm 9 is articulated around a horizontal axis 91 and actuated by a hydraulic jack 8 secured to the fixed frame member 7, at the level of the spacer 6.
  • the jack 8 is connected to a pump 11 controlled by a lever 13.
  • the upper end of the lifting arm 9 is integral with a support plate 14 on which the removable plate 103 rests.
  • the plate 103 is held horizontal, as can be seen on FIG. figure 2 , in side view.
  • the left wheel support 1 and the right wheel support 4 consist of a frame 106 for laying the wheels and welded fixed arms 104 and 105 formed of profiled tubes of square section.
  • Each frame 106 has a wheel alignment axis 107 shifted towards the rear of the frame.
  • Three through passages 2 for adjusting the length of the plate 103, and identical contours, are formed on each of the wheel supports 1 and 4.
  • the contour the contour of the opening passage 2 comprises an arc of circle 33 closed by a protrusion 34 projecting out of the radius of the arc 33.
  • the three through-passages 51, 52 and 53 of the wheel support 4 are aligned and each oriented differently, their outgrowth being rotated 120 ° between two adjacent passages.
  • the three through passages 54, 55 and 56 of the wheel support 1 are aligned and each oriented differently, their outgrowth being rotated 120 ° between two adjacent passages, their outgrowth being rotated 120 ° between two adjacent passages.
  • the carrier arm 104 of the left wheel support 1 and the arm 105 of the right wheel support 4 of the present lifting device are locked together by means of a locking pin 3, or key-type locking pin, introduced vertically in the through passages 53 and 54 and are locked with the lifting arm 9 by means of the same locking pin 3.
  • the lock axis is shown alone on the figure 3A .
  • a radially protruding key 31 is formed on the surface of the upper part of the locking pin 3.
  • the cross section of the upper part of the locking pin 3 which includes the key 3 is complementary to the contour of the through passages 2. This makes it possible to lock the first wheel support 1 and the second wheel support 4 together using of the key 31.
  • the lower part 32 of the locking pin 3 is intended to be driven into a housing formed in the support plate 104 in the plane of symmetry of the lifting device 102, so as to lock the supports 1 and 4 with the arm lifting 9.
  • the following describes how the lifting device 101 is used.
  • the length is then adjusted between the frames of the left support 1 and the right support 4 depending on the distance between the two wheels of the mower.
  • the arms 104 and 103 of the supports 1 and 4 are slid into each other until a suitable spacing between the two frames 106 is obtained and two passing passages of the wheel support 1 and the support are superimposed together. of wheels 4.
  • the tray 103 is removable, the tray 103 can be detached from the hoist 102 and brought closer to the wheels of the mower in order to make the choice of the length adjustment more easily.
  • the locking pin 3 is then inserted into one of the through-passages 2, after having if necessary rested the plate on the support plate 104, in order to secure in place the left support 1 to the right support 4 and to the lifting arm 9 .
  • the lawn mower is slowly moved in order to rest its two wheels on the frame 106 of the left support 1 and on the frame 106 of the right support 4.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Harvester Elements (AREA)
  • Soil Working Implements (AREA)

Description

1. Domaine de l'invention 1. Field of the invention

Le domaine de l'invention est celui de l'outillage de jardin.The field of the invention is that of garden tools.

Plus précisément, l'invention concerne un dispositif de levage de tondeuse, ou de tracteur autoporté, à force hydraulique.More specifically, the invention relates to a mower lifting device, or self-propelled tractor, hydraulic force.

2. Etat de la technique 2. State of the art

Avec l'accélération de l'urbanisation et le développement accéléré de la construction des nouvelles zones rurales, la superficie des espaces verts et des jardins et par conséquent la charge de travail du personnel d'entretien ne cesse de croître.With the acceleration of urbanization and the accelerated development of the construction of new rural areas, the area of green spaces and gardens and consequently the workload of the maintenance staff continues to grow.

L'entretien des pelouses est un point particulièrement important dans les travaux d'entretien des espaces verts.Lawn care is a particularly important point in the maintenance of green spaces.

Les tondeuses sont actuellement le principal outil d'entretien des pelouses. Elles permettent de réduire de façon importante la charge de travail du personnel. De plus, une fois tondue la pelouse est plus homogène, plus belle et plus ordonnée.Lawn mowers are currently the main lawn care tool. They can significantly reduce the workload of staff. In addition, once mowed the lawn is more homogeneous, more beautiful and more orderly.

Du fait de l'utilisation intensive des tondeuses, il est nécessaire de prévoir un entretien régulier et les réparations sont fréquentes.Due to the intensive use of lawn mowers, regular maintenance is required and repairs are frequent.

Ainsi, lorsque les lames de coupe situées en partie inférieure de la tondeuse coupent l'herbe près du sol, elles sont souvent maculées de boue et d'herbe et il faut alors les nettoyer.For example, when the cutting blades in the lower part of the lawnmower cut the grass close to the ground, they are often stained with mud and grass and must be cleaned.

Actuellement, il est nécessaire de coucher la tondeuse sur le côté pour l'entretenir ou la réparer. Elle est renversée par la force humaine et des moyens du bord sont employés pour la maintenir en position.Currently, it is necessary to put the lawn mower on its side to maintain or repair it. It is overthrown by human force and means of the board are used to keep it in position.

Ainsi, non seulement il faut utiliser une force physique importante mais la manipulation peut nécessiter plusieurs personnes. De plus, il n'est pas possible de placer la tondeuse dans une position idéale. Pour résumer ce qui est susmentionné, l'entretien peut comporter des risques pour la sécurité des personnes, du fait que la tondeuse peut basculer lors du nettoyage ou que des lames endommagées peuvent occasionner des blessures.Thus, not only must a significant physical force be used, but the manipulation may require several people. Moreover, it is not possible to place the mower in an ideal position. To summarize the above, maintenance can be dangerous for the safety of people, because the mower can tip over when cleaning, or damaged blades can cause injury.

Au vu de ces circonstances, il est vraiment nécessaire d'employer un outil complémentaire pour soulever et positionner la tondeuse.Given these circumstances, it is really necessary to use a complementary tool to lift and position the mower.

Il est connu d'utiliser des lève-tondeuses.It is known to use lawn-lifters.

Ceux-ci peuvent être actionnés manuellement, par exemple à l'aide d'une manivelle d'un cric ou être équipés d'un vérin hydraulique ou pneumatique pour faciliter le levage des tondeuses.These can be operated manually, for example using a crank jack or be equipped with a hydraulic or pneumatic cylinder to facilitate the lifting of lawnmowers.

On connait des lève-tondeuses permettant de basculer une tondeuse sur le côté. On connait également des lèves-tondeuses permettant de soulever un essieu d'une tondeuse, et dans la plupart des cas l'essieu portant les roues avant d'une tondeuse.We know lawnmowers to tilt a mower on the side. There are also known lawn mowers for lifting an axle from a mower, and in most cases the axle carrying the front wheels of a mower.

Un inconvénient des lève-tondeuse connus destinés à soulever un essieu d'une tondeuse est que le lève-tondeuse se trouve déséquilibré si la tondeuse n'est pas placée sur le lève-tondeuse de façon symétrique. Un déport trop important des roues de la tondeuse sur l'un ou l'autre des côtés du lève-tondeuse risque de provoquer un basculement voire une chute du lève-tondeuse et de la tondeuse, ce qui est particulièrement dangereux pour une personne intervenant sous la tondeuse.A disadvantage of known lawn mowers for lifting an axle from a mower is that the lawn mower is unbalanced if the mower is not placed on the lawn mower symmetrically. Excessive movement of the mower's wheels on either side of the lawn mower may cause the lawn mower and mower to tilt or fall, which is particularly dangerous for a person working under the lawn mower. the lawnmower.

Un autre inconvénient des lève-tondeuse connus est qu'ils sont prévus pour accueillir des tondeuses présentant un écartement entre roues donné et qu'ils ne sont généralement pas adaptées pour être utilisés avec des tondeuses présentant un écartement entre roues différent.Another disadvantage of known lawn mowers is that they are intended to accommodate mowers having a given spacing between wheels and they are generally not suitable for use with lawnmowers having a different wheel spacing.

Le document US-A1-2005/0253122 décrit un lève-tondeuse conforme au préambule de la revendication 1, permettant d'ajuster l'écartement entre les rampes destinées chacune à accueillir une roue avant de la tondeuse.The document US-A1-2005 / 0253122 describes a lawn mower according to the preamble of claim 1, for adjusting the spacing between the ramps each for accommodating a front wheel of the mower.

1. Objectifs de l'invention 1. Objectives of the invention

L'invention a donc notamment pour objectif de pallier les inconvénients de l'état de la technique cités ci-dessus.The invention therefore particularly aims to overcome the disadvantages of the state of the art mentioned above.

Plus précisément l'invention a pour objectif de fournir une technique de lève tondeuse qui puisse être utilisée pour soulever tout type de tondeuse.More specifically, the invention aims to provide a lawn mower technique that can be used to lift any type of mower.

Un objectif de l'invention est également de fournir une technique de lève-tondeuse qui soit simple à mettre en oeuvre et qui puisse être utilisé par une personne seule.An object of the invention is also to provide a lawn mower technique that is simple to implement and can be used by a single person.

Un autre objectif de l'invention est de fournir une telle technique qui soit d'un coût de revient réduit.Another object of the invention is to provide such a technique which is of a reduced cost.

Un objectif de l'invention est également de proposer un lève-tondeuse qui soit aisé à stocker, facile à transporter.An object of the invention is also to provide a lawn mower that is easy to store, easy to transport.

Encore un objectif de l'invention est de fournir une telle technique qui soit fiable.Yet another object of the invention is to provide such a technique which is reliable.

1. Exposé de l'invention 1. Presentation of the invention

Ces objectifs, ainsi que d'autres qui apparaitront par la suite sont atteints à l'aide d'un dispositif de levage d'une tondeuse comprenant un bras de levage mobile autour d'un axe sensiblement horizontal par rapport à un élément de châssis fixe entre une position de rangement dans lequel ledit bras de levage s'étend sensiblement dans le plan formé par ledit élément de châssis fixe, et au moins une position relevée dans lequel ledit bras de levage est écarté dudit élément de châssis, ledit bras de levage étant actionné par un vérin hydraulique solidaire dudit châssis fixe et portant un plateau amovible apte à recevoir des roues d'un même essieu de ladite tondeuse, comprenant un premier support de roue s'étendant d'un côté dudit bras de levage et un deuxième support de roue s'étendant de l'autre côté dudit bras de levage, lesdits supports de roue étant montés coulissants l'un par rapport à l'autre de façon à pouvoir ajuster l'écartement entre lesdits supports.These and other objectives which will appear later are achieved by means of a lifting device of a mower comprising a lifting arm movable about a substantially horizontal axis with respect to a fixed frame member between a storage position in which said lift arm extends substantially in the plane formed by said fixed frame member, and at least one raised position in which said lift arm is spaced apart from said frame member, said lift arm being actuated by a hydraulic cylinder secured to said fixed frame and carrying a removable tray adapted to receive wheels of the same axle of said mower, comprising a first wheel support extending from one side of said lifting arm and a second support of a wheel extending on the other side of said lifting arm, said wheel supports being slidably mounted relative to each other so as to be able to adjust the spacing between said pports.

Selon l'invention, ledit dispositif présente des moyens de verrouillage dudit premier support avec ledit deuxième support et ledit bras de levage.According to the invention, said device has means for locking said first support with said second support and said lifting arm.

Ainsi, de façon inédite et astucieuse, l'invention propose de prévoir une possibilité d'ajustement de l'écartement entre les supports de roues, au moyen de supports de roues montés coulissants, afin d'adapter le dispositif lève-tondeuse à chaque tondeuse.Thus, in a novel and clever way, the invention proposes to provide a possibility of adjusting the spacing between the wheel supports, by means of sliding wheel supports, to adapt the lawn mower device to each mower .

Par ailleurs le plateau constitué d'un assemblage de deux supports de roues est amovible ce qui facilite le réglage de l'écartement entre les supports de roues et le rangement du dispositif lève-tondeuse.Furthermore, the plate consisting of an assembly of two wheel supports is removable which facilitates the adjustment of the spacing between the wheel supports and the storage device lawn mower.

En outre, le verrouillage des supports de roues entre eux et leur verrouillage avec le bras de levage s'effectue ensemble, ce qui est particulièrement simple.In addition, locking the wheel supports together and locking them with the lifting arm is done together, which is particularly simple.

Avantageusement, ledit premier support présente un bras s'emboitant de façon coulissante dans un bras dudit deuxième support.Advantageously, said first support has an arm slidably interlocking in an arm of said second support.

Selon un mode de réalisation particulièrement avantageux de l'invention, lesdits moyens de verrouillage comprennent un axe de verrouillage formant clavette apte à s'insérer dans des passages débouchants de contours sensiblement identiques formés dans ledit premier support de roue et dans ledit deuxième support de roue et, au moins partiellement, dans un logement formé dans ledit bras.According to a particularly advantageous embodiment of the invention, said locking means comprise a locking pin forming a key capable of being inserted in through passages of substantially identical contours formed in said first wheel support and in said second wheel support. and, at least partially, in a housing formed in said arm.

On réalise ainsi le verrouillage du premier support avec le deuxième support et le bras de levage d'une façon simple et efficace.The first support is thus locked with the second support and the lift arm in a simple and effective manner.

En particulier, la forme correspondant de l'axe de verrouillage formant clavette et des passages débouchants permet un verrouillage efficace des deux supports de roues entre eux.In particular, the corresponding shape of the key locking shaft and through passages allows effective locking of the two wheel supports together.

De préférence, ledit axe de verrouillage est orienté suivant la verticale lorsque le premier support est verrouillé avec le deuxième support et le bras de levage.Preferably, said locking pin is oriented vertically when the first support is locked with the second support and the lifting arm.

Dans un autre mode de réalisation de l'invention, l'axe de verrouillage peut être orienté suivant l'horizontale lorsque le premier support est verrouillé avec le deuxième support et le bras de levage.In another embodiment of the invention, the locking pin can be oriented horizontally when the first support is locked with the second support and the lift arm.

Dans un mode de réalisation particulier de l'invention, le contour desdits passages débouchants comprend un arc de cercle fermé par une excroissance faisant saillie hors du rayon dudit arc de cercle.In a particular embodiment of the invention, the contour of said through passages comprises a circular arc closed by a protrusion protruding out of the radius of said arc.

De façon avantageuse, ladite excroissance est de forme sensiblement complémentaire de ladite clavette.Advantageously, said protrusion is of substantially complementary shape of said key.

Selon un aspect particulier de l'invention, ledit logement est formé dans un plan de symétrie vertical dudit bras.According to a particular aspect of the invention, said housing is formed in a vertical plane of symmetry of said arm.

Préférentiellement, ledit premier support de roue et ledit second supports de roue présentent une pluralité de passages débouchants sensiblement alignés suivant la direction de coulissement desdits supports, et de contours sensiblement identiques, et chacun desdits passages débouchants sensiblement alignés dudit premier support de roue ou dudit deuxième support de roue est disposé selon une orientation différente de celle des autres passages dudit premier support de roue ou dudit deuxième support de roue.Preferably, said first wheel support and said second wheel supports have a plurality of through-passages substantially aligned in the sliding direction of said supports, and substantially identical contours, and each of said substantially aligned through-passages of said first wheel support or said second wheel support. wheel support is disposed in a different orientation than the other passages of said first wheel support or said second wheel support.

Ainsi, en prévoyant des passages débouchants d'orientation différente, on évite le risque d'assembler les supports de roues ensemble d'une façon non convenable.Thus, by providing through passages of different orientation, it avoids the risk of assembling the wheel supports together in an unsuitable manner.

Avantageusement, la distance entre l'extrémité dudit premier support de roue la plus éloignée dudit bras de levage et chacun desdits passages débouchants dudit premier support de roue est égale à la distance entre l'extrémité dudit deuxième support de roue la plus éloignée dudit bras de levage et un passage débouchant dudit deuxième support de roue présentant une orientation identique à celle dudit passage débouchant dudit premier support lorsque lesdits supports de roue sont montés coulissants l'un par rapport à l'autre.Advantageously, the distance between the end of said first wheel support farthest from said lifting arm and each of said through passages of said first wheel support is equal to the distance between the end of said second wheel support farthest from said arm of lifting and a passage opening from said second wheel support having an orientation identical to that of said passage opening from said first support when said wheel supports are slidably mounted relative to each other.

Ainsi, pour pouvoir verrouiller les supports de roues sur le bras de levage, il est nécessaire que les parties du plateau qui dépassent de chaque côté du bras de levage soient de même longueur.Thus, to be able to lock the wheel supports on the lift arm, it is necessary that the parts of the plate that protrude from each side of the lift arm are of the same length.

Selon un aspect particulier de l'invention, ledit bras dudit premier support de roue et ledit bras dudit deuxième support de roue sont formés d'un profilé de section carrée.According to a particular aspect of the invention, said arm of said first wheel support and said arm of said second wheel support are formed of a section of square section.

Dans des variantes de l'invention, il peut être envisagé que les bras des supports de roues soient des tubes.In variants of the invention, it may be envisaged that the arms of the wheel supports are tubes.

5. Liste des figures 5. List of figures

D'autres caractéristiques et avantages de l'invention apparaitront plus clairement à la lecture de la description suivante d'un mode de réalisation de l'invention, donné à titre de simple exemple illustratif et non limitatif, et des dessins annexés parmi lesquels :

  • la figure 1 illustre dans une vue en perspective un exemple de mode de réalisation d'un dispositif de levage de tondeuse selon l'invention lors que le bras de levage est relevé et les supports de roues et le bras de levage sont verrouillées ensemble ;
  • la figure 2 est une vue de côté du dispositif de levage de tondeuse présenté en référence à la figure 1 ;
  • la figure 3 est une vue de détail de l'axe de verrouillage formant clavette ;
  • la figure 4 est une vue de dessus du dispositif de levage de tondeuse présenté en référence à la figure 1 ;
  • la figure 5 est une vue de détail de la zone de verrouillage des supports de roues, lorsque l'axe de verrouillage a été retiré.
Other features and advantages of the invention will emerge more clearly on reading the following description of an embodiment of the invention, given by way of a simple illustrative and nonlimiting example, and the appended drawings among which:
  • the figure 1 illustrates in perspective view an exemplary embodiment of a mower lifting device according to the invention when the lifting arm is raised and the wheel supports and the lifting arm are locked together;
  • the figure 2 is a side view of the mower lifting device presented with reference to the figure 1 ;
  • the figure 3 is a detail view of the locking pin forming a key;
  • the figure 4 is a top view of the mower lifting device presented with reference to the figure 1 ;
  • the figure 5 is a detail view of the locking area of the wheel supports, when the locking pin has been removed.

6. Description6. Description détaillée de l'inventionDetailed description of the invention

On a illustré sur la figure 1, un premier mode de réalisation d'un dispositif selon l'invention de levage 101 de tondeuse, et notamment d'une tondeuse autoportée.We illustrated on the figure 1 , a first embodiment of a device according to the invention of lifting lawn mower, and in particular a riding mower.

Ce dispositif de levage 101 comprend un appareil de levage 102 et un plateau amovible 103 comprenant sur sa gauche un premier support de roues 1 et sur sa droite un deuxième support de roues 4, montés coulissants l'un par rapport à l'autre.This lifting device 101 comprises a hoist 102 and a removable tray 103 comprising on its left a first wheel support 1 and on its right a second wheel support 4, mounted sliding relative to each other.

L'appareil de levage 102, connu en soi, comprend un élément de châssis fixe 7, ou embase, équipé de roues avant 5 et de roues arrière 10 sur lequel est monté pivotant un bras de levage 9. Sur la figure 1, le bras de levage 9 est dans une position relevée.The lifting apparatus 102, known per se, comprises a fixed frame member 7, or base, equipped with front wheels 5 and rear wheels 10 on which is pivotally mounted a lifting arm 9. On the figure 1 the lifting arm 9 is in a raised position.

Le bras de levage 9 est articulé autour d'un axe horizontal 91 et actionné par un vérin hydraulique 8 solidarisé à l'élément de châssis fixe 7, au niveau de l'entretoise 6. Le vérin 8 est relié à une pompe 11 commandée par un levier 13.The lifting arm 9 is articulated around a horizontal axis 91 and actuated by a hydraulic jack 8 secured to the fixed frame member 7, at the level of the spacer 6. The jack 8 is connected to a pump 11 controlled by a lever 13.

L'extrémité supérieure du bras de levage 9 est solidaire d'une plaque formant support 14 sur laquelle repose le plateau amovible 103. Lors du basculement du bras de levage 9, le plateau 103 est maintenu horizontal, comme on peut le voir sur la figure 2, en vue de côté.The upper end of the lifting arm 9 is integral with a support plate 14 on which the removable plate 103 rests. When the lifting arm 9 is tilted, the plate 103 is held horizontal, as can be seen on FIG. figure 2 , in side view.

Le support de roue gauche 1 et le support de roues droit 4 sont constitués d'un cadre 106 pour poser les roues et de bras fixes soudés 104 et 105, formés de tubes profilés de section carrés.The left wheel support 1 and the right wheel support 4 consist of a frame 106 for laying the wheels and welded fixed arms 104 and 105 formed of profiled tubes of square section.

Chaque cadre 106 présente un axe de calage des roues 107 décalé vers l'arrière du cadre.Each frame 106 has a wheel alignment axis 107 shifted towards the rear of the frame.

On peut voir sur la figure 4, en vue de dessus, que la distance A, à gauche, ou B, à droite, entre l'axe de symétrie des cadres 106 et le plan de symétrie de l'appareil de levage 102 est identiques, ou en d'autres termes que les cadres 106 sont positionnés de façon symétrique de chaque côté de l'appareil de levage 102.We can see on the figure 4 in a view from above, that the distance A, on the left, or B, on the right, between the axis of symmetry of the frames 106 and the plane of symmetry of the lifting apparatus 102 is identical, or in other words that the frames 106 are symmetrically positioned on each side of the hoist 102.

Trois passages débouchants 2 permettant d'ajuster la longueur du plateau 103, et de contours identiques, sont formés sur chacun des supports de roues 1 et 4.Three through passages 2 for adjusting the length of the plate 103, and identical contours, are formed on each of the wheel supports 1 and 4.

On a représenté un de ces passages débouchant sur la figure 3B.One of these passages leading to the figure 3B .

On peut voir sur la figure 3B que le contour le contour du passage débouchant 2 comprend un arc de cercle 33 fermé par une excroissance 34 faisant saillie hors du rayon de l'arc de cercle 33.We can see on the figure 3B that the contour the contour of the opening passage 2 comprises an arc of circle 33 closed by a protrusion 34 projecting out of the radius of the arc 33.

En référence à la figure 5, on peut voir que les trois passages débouchants 51, 52 et 53 du support de roues 4 sont alignés et orientés chacun différemment, leur excroissance étant pivotée de 120° entre deux passages adjacents. On peut également voir sur la figure 5 que les trois passages débouchants 54, 55 et 56 du support de roues 1 sont alignés et orientés chacun différemment, leur excroissance étant pivotée de 120° entre deux passages adjacents, leur excroissance étant pivotée de 120° entre deux passages adjacents.With reference to the figure 5 it can be seen that the three through-passages 51, 52 and 53 of the wheel support 4 are aligned and each oriented differently, their outgrowth being rotated 120 ° between two adjacent passages. We can also see on the figure 5 that the three through passages 54, 55 and 56 of the wheel support 1 are aligned and each oriented differently, their outgrowth being rotated 120 ° between two adjacent passages, their outgrowth being rotated 120 ° between two adjacent passages.

Sur la figure 5, on constate également que les contours des passages débouchants 53 et 54 se superposent, ce qui permet d'introduire un axe de guidage.On the figure 5 it is also noted that the outlines of the through passages 53 and 54 are superimposed, which allows to introduce a guide axis.

Comme on le distingue sur la figure 1, le bras porteur 104 du support de roue gauche 1 et le bras 105 du support de roue droit 4 du présent dispositif de levage sont verrouillés ensemble à l'aide d'un axe de verrouillage 3, ou goujon de verrouillage de type clavette, introduit verticalement dans les passages débouchants 53 et 54 et sont verrouillés avec le bras de levage 9 à l'aide du même axe de verrouillage 3.As we distinguish it on the figure 1 , the carrier arm 104 of the left wheel support 1 and the arm 105 of the right wheel support 4 of the present lifting device are locked together by means of a locking pin 3, or key-type locking pin, introduced vertically in the through passages 53 and 54 and are locked with the lifting arm 9 by means of the same locking pin 3.

On a représenté l'axe de verrouillage seul sur la figure 3A.The lock axis is shown alone on the figure 3A .

Comme on peut le voir sur la figure 3A, une clavette 31 faisant saillie radialement est formée à la surface de la partie supérieure de l'axe de verrouillage 3.As can be seen on the figure 3A a radially protruding key 31 is formed on the surface of the upper part of the locking pin 3.

La section transversale de la partie supérieure de l'axe de verrouillage 3 qui inclut la clavette 3 est complémentaire du contour des passages débouchants 2. Ceci permet de verrouiller le premier support de roue 1 et le deuxième support de roue 4 ensemble à l'aide de la clavette 31.The cross section of the upper part of the locking pin 3 which includes the key 3 is complementary to the contour of the through passages 2. This makes it possible to lock the first wheel support 1 and the second wheel support 4 together using of the key 31.

La partie inférieure32 de l'axe de verrouillage 3 est destinée à être enfoncée dans un logement formé dans la plaque formant support 104 dans la plan de symétrie de l'appareil de levage 102, de façon à verrouiller les supports 1 et 4 avec le bras de levage 9.The lower part 32 of the locking pin 3 is intended to be driven into a housing formed in the support plate 104 in the plane of symmetry of the lifting device 102, so as to lock the supports 1 and 4 with the arm lifting 9.

On décrit par la suite, comment s'utilise le dispositif de levage 101.The following describes how the lifting device 101 is used.

Avant utilisation, il suffit de tourner la poignée 13 dans le sens antihoraire afin d'ouvrir la soupape de décharge de la pompe 11 et d'abaisser le bras de levage 9 jusqu'à proximité du sol dans une position de rangement dans lequel le bras de levage s'étend sensiblement dans le plan formé par l'élément de châssis fixe.Before use, it is sufficient to turn the handle 13 counterclockwise in order to open the discharge valve of the pump 11 and to lower the lifting arm 9 to near the ground in a storage position in which the arm the lift extends substantially in the plane formed by the fixed frame member.

On règle ensuite la longueur entre les cadres du support gauche 1 et du support droit 4 en fonction de l'écartement entre les deux roues de la tondeuse. Pour cela on fait coulisser les bras 104 et 103 des supports 1 et 4 l'un dans l'autre jusqu'à obtenir un écartement convenable entre les deux cadres 106 et faire coïncider par superposition deux passages débouchants du support de roues 1 et du support de roues 4.The length is then adjusted between the frames of the left support 1 and the right support 4 depending on the distance between the two wheels of the mower. For this purpose, the arms 104 and 103 of the supports 1 and 4 are slid into each other until a suitable spacing between the two frames 106 is obtained and two passing passages of the wheel support 1 and the support are superimposed together. of wheels 4.

Du fait que le plateau 103 est amovible, on peut détacher le plateau 103 de l'appareil de levage 102 et l'approcher des roues de la tondeuse afin de procéder au choix de l'ajustement de longueur plus aisément.Because the tray 103 is removable, the tray 103 can be detached from the hoist 102 and brought closer to the wheels of the mower in order to make the choice of the length adjustment more easily.

Il convient de noter que grâce au 3 passages débouchants prévus dans chacun des supports 1 et 4, il est ainsi possible d'ajuster l'espacement entre les cadres 106 selon trois longueurs différentes. Par ailleurs étant donné l'orientation différente des différents passages débouchants, il n'est pas permis de monter et de verrouiller ensemble les supports 1 et 4 sans que les cadres 106 soient à égale distance de l'axe de verrouillage.It should be noted that thanks to the 3 through passages provided in each of the supports 1 and 4, it is thus possible to adjust the spacing between the frames 106 in three different lengths. Moreover, given the different orientation of the different through passages, it is not allowed to mount and lock together the supports 1 and 4 without the frames 106 are equidistant from the locking axis.

On insère ensuite l'axe de verrouillage 3 dans un des passages débouchants 2, après avoir le cas échéant reposé le plateau sur la plaque formant support 104, afin de sécuriser en place le support gauche 1 au support droit 4 et au bras de levage 9.The locking pin 3 is then inserted into one of the through-passages 2, after having if necessary rested the plate on the support plate 104, in order to secure in place the left support 1 to the right support 4 and to the lifting arm 9 .

Puis on déplace lentement la tondeuse afin de faire reposer ses deux roues sur le cadre 106 du support gauche 1 et sur le cadre 106 du support droit 4. À ce moment, il suffit de tourner la poignée 13 dans le sens horaire pour fermer la soupape de décharge de la pompe 11 et d'enfoncer la poignée 13 de haut en bas afin que la tondeuse s'élève en même temps que s'élève le support gauche 1 et le support droit 4 jusqu'à obtenir l'angle d'inclinaison souhaité du bras de levage 9. Les travaux d'entretien et de nettoyage peuvent commencer.Then the lawn mower is slowly moved in order to rest its two wheels on the frame 106 of the left support 1 and on the frame 106 of the right support 4. At this moment, it suffices to turn the handle 13 clockwise to close the valve discharging the pump 11 and pushing the handle 13 from top to bottom so that the mower rises at the same time as the left support 1 and the right support 4 up to obtain the angle of inclination of the lift arm 9. Maintenance and cleaning work may begin.

Une fois l'entretien terminé, il suffit de tourner la poignée 13 dans le sens antihoraire afin d'ouvrir la soupape de décharge de la pompe 11. Sous l'effet de leur propre poids, le bras de levage 9, le support gauche 1 et le support droit 4 redescendent à leur position la plus basse, puis on tire la tondeuse hors des cadres 106 afin de la séparer du dispositif de levage 101.Once the maintenance is completed, simply turn the handle 13 counterclockwise to open the discharge valve of the pump 11. Under the effect of their own weight, the lifting arm 9, the left support 1 and the right support 4 descend to their lowest position, then the mower is pulled out of the frames 106 to separate it from the hoist 101.

Claims (10)

  1. A lifting device (101) for a lawnmower comprising a lifting arm (9) that is movable around a substantially horizontal axis (91) in relation to a fixed chassis member (7) between a storage position in which said lifting arm (9) substantially extends in the plane formed by said fixed chassis member (7), and at least one elevated position in which said lifting arm (9) is moved apart from said chassis member (7), said lifting arm (9) being actuated by a hydraulic cylinder (8) integral with said fixed chassis (7) and bearing a removable plate (103) able to receive the wheels of a same axle of said lawnmower, comprising a first wheel support (1) extending from one side of said lifting arm (9) and a second wheel support (4) extending from the other side of said lifting arm (9), said wheel supports (1; 4) being slidingly mounted in relation to one another so as to be able to adjust the separation between said supports (1; 4), wherein said device (101) presents means for locking said first support (1) with said second support (2) and said lifting arm (9) .
  2. The lifting device according to claim 1, wherein said first support (1) presents an arm (104) slidingly fitted into an arm (105) of said second support (4).
  3. The lifting device according to claim 2, wherein said arm (104) of said first wheel support (1) and said arm (105) of said second wheel support (4) are formed by a profile with a square cross-section.
  4. The lifting device according to any one of claims 1 to 3, wherein said locking means comprise a locking pin (3) forming a key able to be inserted into the through passages (2, 53; 54; 55) with substantially identical contours formed in said first wheel support (1) and in said second wheel support (4) and, at least partially, in a housing formed in said arm (9).
  5. The lifting device according to claim 4, wherein said locking pin (3) is oriented vertically.
  6. The lifting device according to any one of claims 4 and 5, wherein the contour of said through passages (2, 53; 54; 55) comprises a circular arc (33) closed by a protrusion (34) projecting out of the radius of said circular arc.
  7. The lifting device according to claim 6, wherein said protrusion (34) has a shape substantially matching that of said key (31).
  8. The lifting device according to any one of claims 4 to 7, wherein said housing is formed in a vertical plane of symmetry of said arm (9).
  9. The lifting device according to any one of claims 4 to 8, wherein said first wheel support (1) and said second wheel supports (4) present a plurality of through passages (2, 53; 54; 55) substantially aligned along the direction of sliding of said supports, and with substantially identical contours, and in that each of said substantially aligned through passages (2, 53; 54; 55) of said first wheel support (1) or said second wheel support (4) is arranged in a different orientation from that of the other passages of said first wheel support (1) or said second wheel support (4).
  10. The lifting device according to claim 9, wherein that distance between the end of said first wheel support (1) furthest from said lifting arm (9) and each of said through passages (53; 54; 55) of said first wheel support (1) is equal to the distance between the end of said second wheel support (4) furthest from said lifting arm (9) and a through passage of said second wheel support (4) presenting an identical orientation to that of said through passage of said first support (1) when said wheel supports (1; 4) are mounted slidingly in relation to each other.
EP13005205.3A 2012-11-05 2013-11-05 Hydraulic lawnmower lifting device with adjustable width Active EP2727877B8 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012104359372A CN102942141A (en) 2012-11-05 2012-11-05 Lifting frame for repairing mowing machine

Publications (3)

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EP2727877A1 EP2727877A1 (en) 2014-05-07
EP2727877B1 true EP2727877B1 (en) 2016-04-06
EP2727877B8 EP2727877B8 (en) 2016-06-08

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EP (1) EP2727877B8 (en)
CN (1) CN102942141A (en)
FR (1) FR2997689B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109969981B (en) * 2019-04-03 2020-11-27 青岛科技大学 Novel double-speed hydraulic lifter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5352083A (en) * 1992-01-14 1994-10-04 Don Roberts Towing and wrecker truck construction having an extensible wheel lift
US7278627B2 (en) * 2004-04-23 2007-10-09 Jones Raymond A Riding lawn mower lift
US8141850B2 (en) * 2008-10-24 2012-03-27 Mojack Distributors, Llc Apparatuses and methods for an improved vehicle jack
US8448921B2 (en) * 2009-11-04 2013-05-28 Alltrade Tools Llc Jack with selectively interchangeable components
US8469338B2 (en) * 2010-04-20 2013-06-25 Shinn Fu Corporation Lifting apparatus
US8608130B2 (en) * 2010-04-20 2013-12-17 Shinn Fu Corporation Lifting apparatus
CN202358876U (en) * 2011-11-30 2012-08-01 杭州天恒机械有限公司 Repair frame

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CN102942141A (en) 2013-02-27
EP2727877A1 (en) 2014-05-07
EP2727877B8 (en) 2016-06-08
FR2997689A1 (en) 2014-05-09
FR2997689B1 (en) 2015-01-02

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