EP0306468A1 - Portable driven bucket - Google Patents

Portable driven bucket Download PDF

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Publication number
EP0306468A1
EP0306468A1 EP88870137A EP88870137A EP0306468A1 EP 0306468 A1 EP0306468 A1 EP 0306468A1 EP 88870137 A EP88870137 A EP 88870137A EP 88870137 A EP88870137 A EP 88870137A EP 0306468 A1 EP0306468 A1 EP 0306468A1
Authority
EP
European Patent Office
Prior art keywords
handle
pole
shovel
frame
articulated
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Withdrawn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
EP88870137A
Other languages
German (de)
French (fr)
Inventor
Jules Durieux
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0306468A1 publication Critical patent/EP0306468A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/425—Drive systems for dipper-arms, backhoes or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/427—Drives for dippers, buckets, dipper-arms or bucket-arms with mechanical drives
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/02—Travelling-gear, e.g. associated with slewing gears
    • E02F9/024—Travelling-gear, e.g. associated with slewing gears with laterally or vertically adjustable wheels or tracks
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2004—Control mechanisms, e.g. control levers

Definitions

  • the present invention relates to a portable motorized shovel of small size suitable for earthworks.
  • Document EP-AO 189 008 discloses a small mechanical shovel pivotally mounted on a rolling chassis and controlled by an articulated arm actuated by hydraulic means, said rolling chassis being equipped with wheels and guided by two handlebars and has a tilting platform for the operator.
  • Document FR-A-2 503 764 discloses a vehicle with hydraulic actuation, in particular a small excavator or loader shovel, comprising a driving lever and at least one crutch consisting of a sole articulated to a support arm, the driving lever being equipped with a Bowden control intended to actuate a hydraulic control console.
  • a mechanical shovel or a mechanism for controlling such a shovel does not describe a mechanical shovel or a mechanism for controlling such a shovel.
  • the present invention aims to provide a portable motorized shovel with a small footprint and reduced weight.
  • the portable motorized shovel comprises a frame equipped with an articulated arm, supporting a motor and provided with handlebars, and is characterized in that said articulated arm consists of a pole secured to said frame and in a shovel handle articulated on the free end of said pole, one end of said handle being equipped with a tiltable pallet and the other end of the handle extending beyond the articulation on the pole being articulated on a nut displaceable on a screw endless powered by said motor.
  • said motor is mounted on a cradle tiltably mounted in said frame along an axis substantially perpendicular to the longitudinal axis of the pole.
  • the motor is an electric motor which can rotate in both directions.
  • the engine consists of an internal combustion engine arranged on said cradle via a support pivotally mounted on an axis essentially perpendicular to the pivot axis of the cradle, the drive shaft being arranged essentially parallel to the axis of the screw and being connected, via a centrifugal clutch to a small pulley and a roller in correspondence with a large pulley provided with a rolling surface, arranged in said cradle and linked to said screw in order to driving it in rotation, Bowden type commands controlling the tilting of said support in order either to tension a belt between the large pulley and the small pulley, or to bring said roller into contact with the running surface of the pulley.
  • said frame is articulated on a platform anchored in the ground and intended for the operator.
  • the pallet housed at the free end of the handle can of course be controlled in a manner known per se in a tilting movement intended for its unloading.
  • said pallet is integral with a lever pivotally mounted on the corresponding end of said handle, the opposite end of which is connected to a first rod, itself linked to a second rod via a pivotable lever on said handle, said second rod being essentially parallel to said pole and actuated in a back-and-forth movement by a lever-shaped pedal articulated on said frame.
  • a return spring is advantageously provided in order to return the pedal to its starting position after each actuation.
  • the device according to the present invention is particularly simple and uses a reduced number of mechanical elements.
  • the arrangement of the motorized shovel according to the invention is essentially different from that of a prior art mechanical shovel.
  • the frame is freely articulated on the platform and that the shovel is, in part, actuated by force of a man, whereas, according to the state of the art, the driving force of the shovel or loading it results only from the installed motive power.
  • the judicious arrangement of the various mechanical elements in accordance with the invention makes it possible to obtain a simple, light and therefore portable mechanical shovel, advantageously combining the force of the operator, amplified adequately by levers, with a relatively low motive force.
  • the motorized shovel 1 comprises a frame 3 equipped with a pole 5 made integral with it by welding, for example.
  • Said frame 3 is also provided with two handlebars 7 and 7 ′ integral with it but in adjustable angular positions by means of a pivot axis 9 and a latch 11 blocking the handlebars in various angular positions.
  • the articulated arm of the portable motorized shovel according to the invention consists of the pole 5 and a shovel handle 13 which is articulated on the free end of the pole 5 via a pivot 15.
  • One end of said handle 13 carries the pallet 17, preferably tiltable, and the other end situated beyond the pivot point 15 on the pole 5 is connected by a pivot 19 to a nut 21 which can move on a worm screw 23 driven by a motor 25 housed on frame 3.
  • the motor 25 is fixed to a cradle 27 pivotally mounted in the frame 3 via a pivot axis 29.
  • the rotation of the motor 25 and, therefore, the rotation in one direction or the other of the screw implies the corresponding displacement of the nut 21 and, therefore, the pivoting of the handle 13 relative to the pole 5 .
  • the movement transmission member consists of a ball screw and a ball nut.
  • the link between the drive shaft and said ball screw 23 takes place via a connecting sleeve 31 secured to said shaft and guided by one or more ball bearings 33 trapped in said oscillating cradle 27.
  • the rotation of the ball screw 23 is controlled from the handlebars 7, via one or more control levers 35 located near the handles 37.
  • the motor 25 is an electric motor which can rotate in both directions.
  • the control lever 35 consists of a lever with three positions: front, rear, stop.
  • the engine 25 consists of an internal combustion engine 25 (fig. 4) arranged on said cradle 27 via a support 41 pivotally mounted along an axis 43 essentially perpendicular to the pivot axis 29 of the cradle 27 , the drive shaft 43 being arranged essentially parallel to the axis of the screw 23 and being connected, via a centrifugal clutch 45 to a small pulley 47 and a roller 49 in correspondence with a large pulley 51 provided with a rolling surface 53, arranged at said cradle 27 and linked to said screw 23 for the purpose of driving the latter in rotation, controls of the Bowden type 55, 57 starting from the handlebars 7, 7 ′ being connected to said support 41 via springs 59, 61 and controlling the tilting of said support 41 in order either to tension a belt 63 between the large pulley 51 and the small pulley 47, or to bring said roller 49 into contact with the rolling surface 53 of the pulley 51.
  • an internal combustion engine 25 (fig. 4) arranged on said
  • the frame 3 is advantageously articulated on a platform 67 provided with anchoring points 69 in the ground.
  • handlebars 7, 7 ′ integral with said frame 3. It is intended to be able to fold the handlebars against the cover 65 and to provide them with a handle 71 arranged at a suitable point, which allows easy transport of the motorized shovel like a suitcase.
  • the pallet 17 is fixed to the handle 13 by a lever 75 so as to allow it to be well located to penetrate the ground in good conditions or to avoid unloading during the ascent.
  • the lever 75 pivots around the pivot axis 77 and is controlled by a first rod 79 linked to the latter by a pivot axis 81.
  • a lock 83 may be provided for blocking the pallet in a position fixed relative to on the handle, for example in the case of backfilling.
  • a stop 85 is provided to limit the tilting movement of the pallet.
  • Said first rod 79 is connected to a second rod 87 via a lever 89 pivoting on the handle at a pivot point 15.
  • This second rod is actuated by a lever-shaped pedal 91.
  • a spring 93 causes the lever 75 to tilt (fig. 3) which, via the rod 79, raises the pallet 17.
  • an action on the pedal 91 causes the pallet 17 to tilt to empty it and also return it to the working position for the next operation.
  • the ball screw 23 is provided at its upper end with a stop 95 rigidly fixed.
  • the nut 21 of the ball screw 23 is provided with a flexible washer 97 in order to absorb the repeated impact of the stop 95 against the nut 21.
  • Two metal washers 99 and 101 protect this shock absorber 97.
  • a needle stop 103 makes it easier to reverse the direction of travel despite a significant approximation force between the nut and its stops. This device is repeated at the other end of the ball screw 23.
  • the damping washer 97 is then inserted into the hub of the large pulley 51 or into the sheath 31.
  • the power shovel according to the invention is simple and makes it possible to lighten or even eliminate the significant and painful effort provided by an operator when handling a shovel or a pickaxe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)
  • Operation Control Of Excavators (AREA)
  • Handcart (AREA)

Abstract

On décrit une pelle motorisée portative comportant un cadre équipé d'un bras articulé, supportant un moteur et muni de mancherons, et est caractérisée en ce que ledit bras articulé consiste en une perche (5) solidaire dudit cadre (3) et en un manche de pelle (13) articulé sur l'extrémité libre (15) de ladite perche (5), une extrémité dudit manche (15) étant équipée d'une palette (17) basculable et l'autre extrémité du manche (13) s'étendant au-delà de l'articulation (15) sur la perche (5) étant articulée sur un écrou (21) déplaçable sur une vis sans fin (23) actionnée par ledit moteur (25).A portable motorized shovel is described comprising a frame equipped with an articulated arm, supporting a motor and provided with handlebars, and is characterized in that said articulated arm consists of a pole (5) integral with said frame (3) and a handle shovel (13) articulated on the free end (15) of said pole (5), one end of said handle (15) being equipped with a tiltable pallet (17) and the other end of the handle (13) extending beyond the articulation (15) on the pole (5) being articulated on a nut (21) movable on a worm (23) actuated by said motor (25).

Description

Objet de l'inventionSubject of the invention

La présente invention est relative à une pelle motorisée portative de faible encombrement convenant pour des travaux de terrassement.The present invention relates to a portable motorized shovel of small size suitable for earthworks.

Etat de la techniqueState of the art

Par le document EP-A-O 189 008, on connaît une petite pelle mécanique montée de manière pivotable sur un châssis de roulage et commandée par un bras articulé ac­tionné par des moyens hydrauliques, ledit châssis de rou­lage étant équipé de roues et guidé par deux mancherons et comporte une plate-forme basculable destinée à l'opéra­teur.Document EP-AO 189 008 discloses a small mechanical shovel pivotally mounted on a rolling chassis and controlled by an articulated arm actuated by hydraulic means, said rolling chassis being equipped with wheels and guided by two handlebars and has a tilting platform for the operator.

Toutefois, l'appareil décrit est assez complexe, encombrant et lourd. Il permet une grande série de manoeu­vres mais est également assez onéreux.However, the device described is quite complex, bulky and heavy. It allows a large series of maneuvers but is also quite expensive.

Par le document FR-A-2 503 764, on connaît un vé­hicule à actionnement hydraulique, notamment une petite pelle excavatrice ou chargeuse, comportant un levier de conduite et au moins une béquille constituée d'une semelle articulée à un bras de support, le levier de conduite étant équipé d'une commande Bowden destinée à actionner un pupitre de commande hydraulique. On n'y décrit toutefois pas de pelle mécanique ni de mécanisme de commande d'une telle pelle.Document FR-A-2 503 764 discloses a vehicle with hydraulic actuation, in particular a small excavator or loader shovel, comprising a driving lever and at least one crutch consisting of a sole articulated to a support arm, the driving lever being equipped with a Bowden control intended to actuate a hydraulic control console. However, it does not describe a mechanical shovel or a mechanism for controlling such a shovel.

D'autres documents sont relatifs à des pelles mé­caniques et/ou à des mécanismes de commande de pelles méca­niques complexes et destinées à des travaux de terrasse­ment assez importants. On n'y mentionne pas de pelles motorisées portables. On peut citer: US-A-1 474 314; US-A-­2 416 826; GB-A- 776 848; FR-A-l 511 564; US-A-3 589 538; US-A-4 095 752 et US-A-l 822 338.Other documents relate to mechanical shovels and / or control mechanisms for complex mechanical shovels and intended for fairly large earthworks. There is no mention of shovels motorized portable. There may be mentioned: US-A-1,474,314; US-A-2,416,826; GB-A- 776 848; FR-A1 511 564; US-A-3,589,538; US-A-4,095,752 and US-Al 822,338.

Buts de la présente inventionAims of the present invention

La présente invention vise à fournir une pelle motorisée portable de faible encombrement et de poids réduit.The present invention aims to provide a portable motorized shovel with a small footprint and reduced weight.

Elle vise à fournir une pelle du type susmention­né présentant une construction simplifiée tout en permet­tant d'effectuer les manoeuvres de chargement et de déchar­gement et/ou d'excavation de manière assez aisée.It aims to provide a shovel of the aforementioned type having a simplified construction while making it possible to carry out the loading and unloading and / or excavation maneuvers quite easily.

Eléments essentiels de l'inventionEssential elements of the invention

Conformément à la présente invention, la pelle motorisée portative comporte un cadre équipé d'un bras ar­ticulé, supportant un moteur et muni de mancherons, et est caractérisée en ce que ledit bras articulé consiste en une perche solidaire dudit cadre et en un manche de pelle arti­culé sur l'extrémité libre de ladite perche, une extrémité dudit manche étant équipée d'une palette basculable et l'autre extrémité du manche s'étendant au-delà de l'articu­lation sur la perche étant articulée sur un écrou déplaça­ble sur une vis sans fin actionnée par ledit moteur.According to the present invention, the portable motorized shovel comprises a frame equipped with an articulated arm, supporting a motor and provided with handlebars, and is characterized in that said articulated arm consists of a pole secured to said frame and in a shovel handle articulated on the free end of said pole, one end of said handle being equipped with a tiltable pallet and the other end of the handle extending beyond the articulation on the pole being articulated on a nut displaceable on a screw endless powered by said motor.

Selon une forme d'exécution particulièrement pré­férée de la présente invention, ledit moteur est monté sur un berceau monté de manière basculable dans ledit cadre selon un axe substantiellement perpendiculaire à l'axe longitudinal de la perche.According to a particularly preferred embodiment of the present invention, said motor is mounted on a cradle tiltably mounted in said frame along an axis substantially perpendicular to the longitudinal axis of the pole.

Selon une première variante, le moteur est un moteur électrique pouvant tourner dans les deux sens.According to a first variant, the motor is an electric motor which can rotate in both directions.

Selon une autre variante, le moteur consiste en un moteur à combustion interne agencé sur ledit berceau via un support monté de manière pivotable selon un axe es­sentiellement perpendiculaire à l'axe de pivotement du ber­ceau, l'arbre moteur étant agencé essentiellement parallè­lement à l'axe de la vis et étant relié, via un embrayage centrifuge à une petite poulie et un galet en correspon­dance avec une grande poulie munie d'une surface de roule­ment, agencée audit berceau et liée à ladite vis en vue de l'entraînement en rotation de celle-ci, des commandes du type Bowden commandant le basculement dudit support en vue soit de tendre une courroie entre la grande poulie et la petite poulie, soit de mettre en contact ledit galet sur la surface de roulement de la poulie.According to another variant, the engine consists of an internal combustion engine arranged on said cradle via a support pivotally mounted on an axis essentially perpendicular to the pivot axis of the cradle, the drive shaft being arranged essentially parallel to the axis of the screw and being connected, via a centrifugal clutch to a small pulley and a roller in correspondence with a large pulley provided with a rolling surface, arranged in said cradle and linked to said screw in order to driving it in rotation, Bowden type commands controlling the tilting of said support in order either to tension a belt between the large pulley and the small pulley, or to bring said roller into contact with the running surface of the pulley.

De préférence, ledit cadre est articulé sur une plate-forme ancrable dans le sol et destinée à l'opé­rateur.Preferably, said frame is articulated on a platform anchored in the ground and intended for the operator.

La palette logée à l'extrémité libre du manche peut bien entendu être commandée de manière connue en soi dans un mouvement de basculement destiné à son décharge­ment. Avantageusement, ladite palette est solidaire d'un levier monté de manière pivotable sur l'extrémité corres­pondante dudit manche, dont l'extrémité opposée est reliée à une première tringle, elle-même liée à une deuxième trin­gle via un levier pivotable sur ledit manche, ladite deu­xième tringle étant essentiellement parallèle à ladite perche et actionnée dans un mouvement de va-et-vient par une pédale en forme de levier articulé sur ledit cadre. Un ressort de rappel est avantageusement prévu en vue de ramener la pédale dans sa position de départ après chaque actionnement.The pallet housed at the free end of the handle can of course be controlled in a manner known per se in a tilting movement intended for its unloading. Advantageously, said pallet is integral with a lever pivotally mounted on the corresponding end of said handle, the opposite end of which is connected to a first rod, itself linked to a second rod via a pivotable lever on said handle, said second rod being essentially parallel to said pole and actuated in a back-and-forth movement by a lever-shaped pedal articulated on said frame. A return spring is advantageously provided in order to return the pedal to its starting position after each actuation.

On constate que l'appareil conforme à la présen­te invention est particulièrement simple et fait appel à un nombre réduit d'éléments mécaniques. L'agencement de la pelle motorisée conforme à l'invention est essentiellement différent de celui d'une pelle mécanique de l'état de la technique. On notera également que le cadre est articulé librement sur la plate-forme et que la pelle est, en par­tie, actionnée à force d'homme, alors que, selon l'état de 1a technique, la force d'enfoncement de la pelle ou de chargement de celle-ci résulte uniquement de la force motrice installée. L'agencement judicieux des divers élé­ments mécanique conformément à l'invention permet d'obte­nir une pelle mécanique simple, légère et donc portable, combinant avantageusement la force de l'opérateur, ampli­fiée adéquatement par des leviers, à une force motrice relativement faible.It can be seen that the device according to the present invention is particularly simple and uses a reduced number of mechanical elements. The arrangement of the motorized shovel according to the invention is essentially different from that of a prior art mechanical shovel. It will also be noted that the frame is freely articulated on the platform and that the shovel is, in part, actuated by force of a man, whereas, according to the state of the art, the driving force of the shovel or loading it results only from the installed motive power. The judicious arrangement of the various mechanical elements in accordance with the invention makes it possible to obtain a simple, light and therefore portable mechanical shovel, advantageously combining the force of the operator, amplified adequately by levers, with a relatively low motive force.

L'invention est décrite plus en détail ci-après, à l'appui des dessins dans lesquels:

  • - la figure 1 est une vue latérale schématique de la pelle motorisée selon l'invention;
  • - la figure 2 est une vue schématique du dessous de la pelle portative selon la direction A;
  • - la figure 3 est une vue partielle faisant apparaître une autre position de la palette;
  • - la figure 4 est une représentation schématique d'une autre variante de la pelle selon l'inven­tion;
  • - la figure 5 est une vue selon la direction B de la figu­re 4; et
  • - la figure 6 représente une coupe longitudinale à travers l'écrou à billes.
The invention is described in more detail below, in support of the drawings in which:
  • - Figure 1 is a schematic side view of the motorized excavator according to the invention;
  • - Figure 2 is a schematic view of the underside of the portable shovel in direction A;
  • - Figure 3 is a partial view showing another position of the pallet;
  • - Figure 4 is a schematic representation of another variant of the shovel according to the invention;
  • - Figure 5 is a view in direction B of Figure 4; and
  • - Figure 6 shows a longitudinal section through the ball nut.

La pelle motorisée 1 selon la présente invention comporte un cadre 3 équipé d'une perche 5 rendue solidaire à celui-ci par soudage, par exemple. Ledit cadre 3 est éga­lement muni de deux mancherons 7 et 7′ solidaires de celui-ci mais dans des positions angulaires réglables grâ­ce à un axe de pivotement 9 et à un verrou 11 bloquant les mancherons dans diverses positions angulaires.The motorized shovel 1 according to the present invention comprises a frame 3 equipped with a pole 5 made integral with it by welding, for example. Said frame 3 is also provided with two handlebars 7 and 7 ′ integral with it but in adjustable angular positions by means of a pivot axis 9 and a latch 11 blocking the handlebars in various angular positions.

Le bras articulé de la pelle motorisée portative selon l'invention se compose de la perche 5 et d'un manche de pelle 13 qui est articulé sur l'extrémité libre de la perche 5 via un pivot 15. Une extrémité dudit manche 13 porte la palette 17, de préférence basculable, et l'autre extrémité située au-delà du point de pivotement 15 sur la perche 5 est reliée par un pivot 19 à un écrou 21 qui peut se déplacer sur une vis sans fin 23 entrainée par un mo­teur 25 logé sur le cadre 3.The articulated arm of the portable motorized shovel according to the invention consists of the pole 5 and a shovel handle 13 which is articulated on the free end of the pole 5 via a pivot 15. One end of said handle 13 carries the pallet 17, preferably tiltable, and the other end situated beyond the pivot point 15 on the pole 5 is connected by a pivot 19 to a nut 21 which can move on a worm screw 23 driven by a motor 25 housed on frame 3.

Dans la forme d'exécution représentée, le moteur 25 est fixé sur un berceau 27 monté de manière pivotable dans le cadre 3 via un axe de pivotement 29.In the embodiment shown, the motor 25 is fixed to a cradle 27 pivotally mounted in the frame 3 via a pivot axis 29.

La rotation du moteur 25 et, de ce fait, la ro­tation dans un sens ou dans l'autre de la vis implique le déplacement correspondant de l'écrou 21 et, de ce fait, le pivotement du manche 13 par rapport à la perche 5.The rotation of the motor 25 and, therefore, the rotation in one direction or the other of the screw implies the corresponding displacement of the nut 21 and, therefore, the pivoting of the handle 13 relative to the pole 5 .

Selon une forme d'exécution préférée, l'organe de transmission du mouvement consiste en une vis à billes et un écrou à billes. Avantageusement, le lien entre l'ar­bre moteur et ladite vis à billes 23 s'effectue via un fourreau de liaison 31 solidaire dudit arbre et guidé par un ou plusieurs roulements à billes 33 emprisonnés dans ledit berceau oscillant 27.According to a preferred embodiment, the movement transmission member consists of a ball screw and a ball nut. Advantageously, the link between the drive shaft and said ball screw 23 takes place via a connecting sleeve 31 secured to said shaft and guided by one or more ball bearings 33 trapped in said oscillating cradle 27.

La rotation de la vis à billes 23 est commandée à partir des mancherons 7, via un ou plusieurs leviers de commande 35 situés à proximité des poignées 37.The rotation of the ball screw 23 is controlled from the handlebars 7, via one or more control levers 35 located near the handles 37.

Selon une première variante, le moteur 25 est un moteur électrique pouvant tourner dans les deux sens. Dans ce cas, le levier de commande 35 consiste en un levier à trois positions: avant, arrière, arrêt.According to a first variant, the motor 25 is an electric motor which can rotate in both directions. In this case, the control lever 35 consists of a lever with three positions: front, rear, stop.

Selon une autre variante, le moteur 25 consiste en un moteur à combustion interne 25 (fig. 4) agencé sur ledit berceau 27 via un support 41 monté de manière pivo­table selon un axe 43 essentiellement perpendiculaire à l'axe de pivotement 29 du berceau 27, l'arbre moteur 43 étant agencé essentiellement parallèlement à l'axe de la vis 23 et étant relié, via un embrayage centrifuge 45 à une petite poulie 47 et un galet 49 en correspondance avec une grande poulie 51 munie d'une surface de roulement 53, agencée audit berceau 27 et liée à ladite vis 23 en vue de l'entraînement en rotation de celle-ci, des commandes du type Bowden 55, 57 partant des mancherons 7, 7' étant re­liées audit support 41 via des ressorts 59, 61 et comman­dant le basculement dudit support 41 en vue soit de tendre une courroie 63 entre la grande poulie 51 et la petite poulie 47, soit de mettre en contact ledit galet 49 sur la surface de roulement 53 de la poulie 51.According to another variant, the engine 25 consists of an internal combustion engine 25 (fig. 4) arranged on said cradle 27 via a support 41 pivotally mounted along an axis 43 essentially perpendicular to the pivot axis 29 of the cradle 27 , the drive shaft 43 being arranged essentially parallel to the axis of the screw 23 and being connected, via a centrifugal clutch 45 to a small pulley 47 and a roller 49 in correspondence with a large pulley 51 provided with a rolling surface 53, arranged at said cradle 27 and linked to said screw 23 for the purpose of driving the latter in rotation, controls of the Bowden type 55, 57 starting from the handlebars 7, 7 ′ being connected to said support 41 via springs 59, 61 and controlling the tilting of said support 41 in order either to tension a belt 63 between the large pulley 51 and the small pulley 47, or to bring said roller 49 into contact with the rolling surface 53 of the pulley 51.

De cette manière, on obtient un moyen d'entraîne­ment de la vis 23 dans les deux sens de rotation, en plus d'un point mort dans lequel la courroie patine et le galet n'est pas en contact avec la grande poulie.In this way, a means of driving the screw 23 is obtained in the two directions of rotation, in addition to a neutral point in which the belt slips and the roller is not in contact with the large pulley.

On peut également prévoir un capot 65 qui protè­ge l'ensemble vis à billes et/ou le moteur 25.It is also possible to provide a cover 65 which protects the ball screw assembly and / or the motor 25.

Le cadre 3 est avantageusement articulé sur une plate-forme 67 munie de pointes d'ancrage 69 dans le sol.The frame 3 is advantageously articulated on a platform 67 provided with anchoring points 69 in the ground.

La manipulation de la machine en fonctionnement s'effectue à l'aide des mancherons 7, 7′ solidaires dudit cadre 3. Il est prévu de pouvoir rabattre les mancherons contre le capot 65 et de munir ceux-ci d'une poignée 71 disposée à un point adéquat, qui permet le transport aisé de la pelle motorisée à la manière d'une valise.The handling of the machine in operation is carried out using handlebars 7, 7 ′ integral with said frame 3. It is intended to be able to fold the handlebars against the cover 65 and to provide them with a handle 71 arranged at a suitable point, which allows easy transport of the motorized shovel like a suitcase.

On peut également prévoir une roue 73 montée sur le cadre 3, en face des mancherons 7, 7′. De cette maniè­re, on peut déplacer l'appareil à la manière d'une brouette.One can also provide a wheel 73 mounted on the frame 3, opposite the handlebars 7, 7 ′. In this way, you can move the device like a wheelbarrow.

Comme représenté à la figure l, la palette 17 est fixée au manche 13 par un levier 75 de façon à lui permettre d'être bien située pour pénétrer dans le sol dans de bonnes conditions ou pour éviter le déchargement lors de l'ascension. Le levier 75 pivote autour de l'axe de pivotement 77 et est commandé par une première tringle 79 liée à celui-ci par un axe de pivotement 81. Un verrou 83 peut être prévu pour le bloquage de la palette en une position fixée par rapport au manche, par exemple dans le cas d'un remblayage. Une butée 85 est prévue pour limiter le mouvement de basculement de la palette.As shown in Figure l, the pallet 17 is fixed to the handle 13 by a lever 75 so as to allow it to be well located to penetrate the ground in good conditions or to avoid unloading during the ascent. The lever 75 pivots around the pivot axis 77 and is controlled by a first rod 79 linked to the latter by a pivot axis 81. A lock 83 may be provided for blocking the pallet in a position fixed relative to on the handle, for example in the case of backfilling. A stop 85 is provided to limit the tilting movement of the pallet.

Ladite première tringle 79 est reliée à une deu­xième tringle 87 via un levier 89 pivotant sur le manche en un point de pivotement 15. Cette deuxième tringle est actionnée par une pédale en forme de levier 91.Said first rod 79 is connected to a second rod 87 via a lever 89 pivoting on the handle at a pivot point 15. This second rod is actuated by a lever-shaped pedal 91.

Lorsque la palette 17 est remplie et ramenée contre le bas de la perche 5, un ressort 93 provoque le basculement du levier 75 (fig. 3) qui, via la tringle 79 fait remonter la palette 17. Lorsque l'on monte la pelle­tée au-dessus du sol, une action sur la pédale 91 fait basculer la palette 17 pour la vider et aussi la remettre en position de travail pour l'opération suivante.When the pallet 17 is filled and brought back against the bottom of the pole 5, a spring 93 causes the lever 75 to tilt (fig. 3) which, via the rod 79, raises the pallet 17. When the shovel is mounted on the above the ground, an action on the pedal 91 causes the pallet 17 to tilt to empty it and also return it to the working position for the next operation.

Pendant le mouvement de descente de la palette 17 vers le sol et dans le sol, elle reste fixe par rapport à son manche 13. Pendant ce mouvement, la pédale 91 remon­te automatiquement.During the downward movement of the pallet 17 towards the ground and into the ground, it remains fixed relative to its handle 13. During this movement, the pedal 91 rises automatically.

A la figure 6, on a représenté une vue en coupe longitudinale, à plus grande échelle, de l'écrou à billes.In Figure 6, there is shown a sectional view longitudinal, on a larger scale, of the ball nut.

Avantageusement la vis à billes 23 est munie à son extrémité supérieure d'une butée 95 fixée rigidement. L'écrou 21 de la vis à billes 23 est muni d'une rondelle souple 97 dans le but d'amortir l'impact répété de la butée 95 contre l'écrou 21. Deux rondelles métalliques 99 et 101 protègent cet amortisseur 97. Une butée à aiguilles 103 facilite l'inversion du sens de marche malgré une force de rapprochement non négligeable entre l'écrou et ses butées. Ce dispositif est répété à l'autre extrémité de la vis à billes 23. La rondelle d'amortissement 97 est alors insérée dans le moyeu de la grande poulie 51 ou dans le fourreau 31.Advantageously, the ball screw 23 is provided at its upper end with a stop 95 rigidly fixed. The nut 21 of the ball screw 23 is provided with a flexible washer 97 in order to absorb the repeated impact of the stop 95 against the nut 21. Two metal washers 99 and 101 protect this shock absorber 97. A needle stop 103 makes it easier to reverse the direction of travel despite a significant approximation force between the nut and its stops. This device is repeated at the other end of the ball screw 23. The damping washer 97 is then inserted into the hub of the large pulley 51 or into the sheath 31.

La pelle motrice selon l'invention est simple et permet d'allèger voire de supprimer l'effort important et pénible fourni par un opérateur lors de manipulations d'une pelle ou d'une pioche.The power shovel according to the invention is simple and makes it possible to lighten or even eliminate the significant and painful effort provided by an operator when handling a shovel or a pickaxe.

Claims (10)

1. Pelle motorisée portative comportant un cadre équipé d'un bras articulé, supportant un moteur et muni de mancherons, et est caractérisée en ce que ledit bras arti­culé consiste en une perche (5) solidaire dudit cadre (3) et en un manche de pelle (13) articulé sur l'extrémité libre (15) de ladite perche (5), une extrémité dudit man­che (15) étant équipée d'une palette (17) basculable et l'autre extrémité du manche (13) s'étendant au-delà de l'articulation (15) sur la perche (5) étant articulée sur un écrou (21) déplaçable sur une vis sans fin (23) action­née par ledit moteur (25).1. Portable motorized shovel comprising a frame equipped with an articulated arm, supporting a motor and provided with handlebars, and is characterized in that said articulated arm consists of a pole (5) integral with said frame (3) and a handle of shovel (13) articulated on the free end (15) of said pole (5), one end of said handle (15) being equipped with a tiltable pallet (17) and the other end of the handle (13) extending beyond the articulation (15) on the pole (5) being articulated on a nut (21) movable on a worm (23) actuated by said motor (25). 2. Pelle selon la revendication 1 caractérisée en ce que la vis consiste en une vis à billes et en ce que l'écrou consiste en un écrou à billes.2. Shovel according to claim 1 characterized in that the screw consists of a ball screw and in that the nut consists of a ball nut. 3. Pelle selon la revendication 1 ou 2 caracté­risée en ce que ledit moteur (25) est monté sur un berceau (27) monté de manière basculable dans ledit cadre (3) se­lon un axe (29) substantiellement perpendiculaire à l'axe longitudinal de la perche (5).3. Shovel according to claim 1 or 2 characterized in that said motor (25) is mounted on a cradle (27) pivotally mounted in said frame (3) along an axis (29) substantially perpendicular to the longitudinal axis of the pole (5). 4. Pelle selon l'une quelconque des revendica­tions précédentes caractérisée en ce que le moteur 25 consiste un moteur électrique pouvant tourner dans les deux sens de rotation, l'arbre moteur étant de préférence relié à la vis (23) via un fourreau (31) guidé à l'aide de roulements.4. Excavator according to any one of the preceding claims, characterized in that the motor 25 consists of an electric motor which can rotate in both directions of rotation, the motor shaft preferably being connected to the screw (23) via a sheath (31 ) guided with bearings. 5. Pelle selon l'une des revendications 1 à 3 caractériséeen ce que le moteur (25) consiste en un moteur à combustion interne agencé sur ledit berceau (27), de pré­férence via un support (41) monté de manière pivotable se­lon un axe (43) essentiellement perpendiculaire à l'axe de pivotement (29) du berceau (27), l'arbre moteur étant agen­cé essentiellement parallèlement à l'axe de la vis (23) et étant relié, via un embrayage centrifuge (45) à une petite poulie (47) et un galet (49) en correspondance avec une grande poulie (51) munie d'une surface de roulement (53), agencée audit berceau (27) et liée à ladite vis (23) en vue de l'entraînement en rotation de celle-ci, des commandes du type Bowden (55 et 57) commandant le bascule­ment dudit support (41) en vue soit de tendre une courroie (63) entre la grande poulie (51) et la petite poulie (47), soit de mettre en contact ledit galet (49) sur la surface de roulement (53) de la poulie (51).5. Shovel according to one of claims 1 to 3 characterized in that the engine (25) consists of an internal combustion engine arranged on said cradle (27), preferably via a support (41) pivotally mounted along an axis (43) essentially perpendicular to the pivot axis (29) of the cradle (27), the drive shaft being arranged essentially parallel to the axis of the screw (23) and being connected, via a centrifugal clutch (45) to a small pulley (47) and a roller (49) corresponding to a large pulley (51) provided with a rolling surface (53), arranged at said cradle (27) and linked to said screw (23) in view of the drive in rotation thereof, Bowden type controls (55 and 57) controlling the tilting of said support (41) in order either to tension a belt (63) between the large pulley (51) and the small pulley (47), or to bring said roller into contact ( 49) on the rolling surface (53) of the pulley (51). 6. Pelle selon l'une quelconque des revendica­tions précédentes caractérisée en ce que ledit cadre (3) est articulé sur une plate-forme (67), éventuellement mu­nie de pointes d'ancrage (69).6. Shovel according to any one of the preceding claims, characterized in that said frame (3) is articulated on a platform (67), optionally provided with anchoring points (69). 7. Pelle selon l'une quelconque des revendica­tions précédentes caractérisée en ce que la palette (17) est solidaire du levier (75) monté de manière pivotable sur l'extrémité correspondante dudit manche (13), dont l'extrémité opposée est reliée à une première tringle (79), elle-même liée à une deuxième tringle (87) via un levier (89) pivotable sur ledit manche (13), ladite deu­xième tringle (87) étant essentiellement parallèle à la­dite perche (5) et actionnée dans un mouvement de va-et-­vient par une pédale (91) en forme de levier articulé sur ledit cadre (3), un ressort de rappel (93) étant de pré­férence prévu en vue de ramener la pédale dans sa position de départ après chaque actionnement.7. Shovel according to any one of the preceding claims, characterized in that the pallet (17) is integral with the lever (75) pivotally mounted on the corresponding end of said handle (13), the opposite end of which is connected to a first rod (79), itself linked to a second rod (87) via a lever (89) pivotable on said handle (13), said second rod (87) being essentially parallel to said pole (5) and actuated in a reciprocating movement by a lever-shaped pedal (91) articulated on said frame (3), a return spring (93) being preferably provided in order to return the pedal to its starting position after each actuation. 8. Pelle selon l'une quelconque des revendica­tions précédentes caractérisée en ce que l'écrou (21) con­siste en un écrou à billes qui comporte à au moins une extrémité au moins une rondelle souple (97) et, de chaque côté de celle-ci, une rondelle métallique (99 et 101), ainsi qu'une butée à aiguilles(103).8. Shovel according to any one of the preceding claims, characterized in that the nut (21) consists of a ball nut which comprises at least one end at least one flexible washer (97) and, on each side of this- ci, a metal washer (99 and 101), as well as a needle stopper (103). 9. Pelle selon l'une quelconque des revendica­tions précédentes caractérisée en ce que le cadre (3) est équipé d'une roue (73) éventuellement amovible.9. Shovel according to any one of the preceding claims, characterized in that the frame (3) is equipped with a wheel (73) possibly removable. 10. Pelle selon l'une quelconque des revendica­tions précédentes caractérisée en ce que le manche (13) est rabattu contre la perche (5) et les mancherons sont rabattus essentiellement parallèlement à ladite perche (5) et en ce que les mancherons comportent une poignée (71).10. Shovel according to any one of the preceding claims, characterized in that the handle (13) is folded against the pole (5) and the handlebars are folded down essentially parallel to said pole (5) and in that the handlebars comprise a handle (71).
EP88870137A 1987-09-03 1988-08-22 Portable driven bucket Withdrawn EP0306468A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8700991A BE1000891A4 (en) 1987-09-03 1987-09-03 Powered portable shovel.
BE8700991 1987-09-03

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EP0306468A1 true EP0306468A1 (en) 1989-03-08

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US5127172A (en) * 1991-08-28 1992-07-07 Kenneth Lund Guard rail cleanout device
US7096970B1 (en) 2000-02-02 2006-08-29 Porter Roger D Compact bed edging machine
US7819345B2 (en) * 2007-09-17 2010-10-26 Shoap Stephen D Method and system for fluid transmission along significant distances
US7942350B2 (en) * 2008-09-16 2011-05-17 Shoap Stephen D Method and system for fluid transmission along significant distances
CN104153405A (en) * 2013-12-13 2014-11-19 中北大学 Hybrid drive controllable parallel-connection excavation mechanism
CN106482976B (en) * 2016-12-08 2023-03-14 合肥工业大学 Multi-functional convenient device that fetches earth

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EP0189008A1 (en) * 1984-12-12 1986-07-30 Beltrami, Osmano Trolley-mounted, hand propelled backhoe

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EP0189008A1 (en) * 1984-12-12 1986-07-30 Beltrami, Osmano Trolley-mounted, hand propelled backhoe

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BE1000891A4 (en) 1989-05-09
US4843743A (en) 1989-07-04

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