Classifications

• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
  • A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
  • A01B33/02—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on horizontal shaft transverse to direction of travel
  • A01B33/028—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on horizontal shaft transverse to direction of travel of the walk-behind type

Definitions

• the invention relates to garden equipment with retractable transport wheel, in particular walk-behind garden equipment.
• the invention also relates to retractable transport wheel devices for garden equipment.
• a retractable transport wheel device for garden equipment is intended to facilitate the maneuvering operations of the garden equipment on which the device is mounted.
• Such garden equipment is for example a tiller, a tiller, a brushcutter or any equivalent equipment.
• a retractable transport wheel device comprising a support for attaching the device to the garden equipment and an articulated arm pivotally mounted relative to the mounting bracket and carrying a transport wheel.
• the articulated arm is adapted to be moved, once the device is fixed to the equipment of motoculture, at least a first position, said transport position, wherein said wheel rests on the ground, at least a second position, said working position, wherein said wheel is not in contact with the ground.
• the device comprises means for locking the articulated arm in the transport position and in the working position.
• the operator operating the garden equipment for example a tiller
• the tiller can be operated and the tools that generally provide such a garden equipment can be put into action to garden the area without being bothered by the presence of the wheel.
• US 6,494,270 discloses garden equipment equipped with a retractable transport wheel device.
• This device comprises a hydraulic cylinder adapted to actuate the articulated arm carried by the mounting bracket.
• This hydraulic cylinder also serves as locking means of the articulated arm in the transport and work positions.
• This device is not very suitable for mass market machinery that is generally free of hydraulic controls. Such a device is therefore reserved for garden equipment for professional farmers.
• this retractable transport wheel device can not be maneuvered easily by an operator. It requires access to the hydraulic control.
• Such a device comprises an articulated arm which carries, in the vicinity of the end cooperating with the pivot axis, lugs adapted to be housed in notches formed in the mounting bracket.
• a first pair of notches define the transport position and a second pair of notches defines the working position.
• the stalls of the articulated arm of the second pair of notches defining the working position are possible.
• a garden equipment is intended to plow or garden rocky or at least earthy grounds and is subjected to many vibrations. It is therefore common for such a device to get off its working position during gardening on difficult terrain, despite the presence of the locking means that form the notches and lugs.
• the articulated arm pivots violently from its working position to the transport position, potentially breaking the axle shaft, or even injuring someone.
• Such a device is not very reliable in practice.
• the aim of the invention is to overcome at least some of the disadvantages of known retractable conveyor wheel machinery.
• the invention aims to provide, in at least one embodiment, a garden equipment with retractable transport wheel that allows a quick retraction of the transport wheel from the transport position to the working position, and vice versa .
• the invention also aims to provide, in at least one embodiment, a garden equipment with retractable transport wheel which does not present a risk of stalling the articulated arm from the working position to the transport position.
• the invention also aims to provide, in at least one embodiment of the invention, a garden equipment transport retractable transport wheel easy to maneuver.
• the invention also aims to provide, in at least one embodiment, a motoculture equipment retractable transport wheel economical to manufacture. 4. Presentation of the invention
• the invention proposes a retractable transport wheel motorization equipment (4) comprising a support (1) for attaching an articulated arm (2) intended to carry said transport wheel (4), characterized in that that the fixing support comprises at least one oblong slot, called guide light, adapted to receive a guide pin secured to said articulated arm and able to move in said oblong guide slot during movement of said articulated arm of a position transport to a work position and vice versa.
• the fixing support comprises at least one oblong slot, called guide light, adapted to receive a guide pin secured to said articulated arm and able to move in said oblong guide slot during movement of said articulated arm of a position transport to a work position and vice versa.
• the operation of the articulated arm is facilitated by guiding the pivoting of the articulated arm from the transport position to the working position, and vice versa, and obtained by the displacement of at least one integral guide pin of the arm. articulated in an oblong guiding slot formed in the fixing support. Such guidance makes the retraction of the transport wheel faster and easier than in the known garden equipment.
• the guiding light is adapted to form with the guide pin locking means of the articulated arm in the working position.
• the invention thus limits the risks of spontaneous tipping, inherent to the solutions where the holding in position relies exclusively on a notched system.
• the guiding light has a shape and dimensions shaped and conjugate to the shape and dimensions of the guide pin to be able to form means for locking the articulated arm in the working position.
• This guide light has for example a shape delimited by a border comprising a portion against which can abut the guide pin and thus oppose the pivoting of the articulated arm from the working position to the transport position.
• this portion against which can abut the tenon is a non-vertical portion which thus opposes the pivoting of the articulated arm under the effect of the weight of the wheel, thus blocking the articulated arm in the working position.
• the material in which the guide pin and the peripheral edge of the guide light are made can also participate in the blocking by providing a significant coefficient of friction between the post and the edge of the light.
• the tenon and the guiding light have shapes and dimensions adapted so that said pin can enter, in said transport position, in abutment against a portion of the fixing support delimiting a first end of the guiding light, and in the working position in abutment against a portion of the fixing bracket delimiting the opposite end of the guide light.
• said articulated arm :
• sliding slot has at least one oblong slot, called sliding slot, through which the pivot shaft passes so that the articulated arm can slide on the pivot shaft during the displacement of the articulated arm from a transport position to a position working and vice versa.
• Pivoting the articulated arm from the transport position to the working position is performed around a pivot shaft secured to the mounting bracket.
• the articulated arm further has a sliding slot through which the pivot shaft passes.
• the guide light has a shape that makes it possible to pivot the articulated arm only if the arm and the pivot shaft can move relative to each other. This pivoting is made possible according to this variant, regardless of the shape of the guide light, by the presence of at least one sliding slot.
• the guiding light is an arc of a circle, centered on the pivot shaft, it is not necessary to have a sliding light, the pivoting of the arm being possible independently of a relative movement between the articulated arm and the pivot shaft.
• the pivoting of the articulated arm requires the presence of at least one sliding slot to allow relative movement of the articulated arm and the pivot shaft.
• each oblong sliding slot extends along a direction, called the longitudinal direction, and the pivot shaft passes through each light in a transverse direction.
• This longitudinal shape of the sliding light allows the device to operate regardless of the shape of the guide lights.
• the articulated arm can slide longitudinally along the pivot shaft regardless of the displacement of the guide pin in the guide light.
• the retractable transport wheel device comprises at least one spring mounted between the pivot shaft and the articulated arm so that it can oppose the spontaneous sliding of the articulated arm on the pivot shaft.
• the spring cooperates with the guide light and the tenon to maintain the articulated arm in the working position, in the absence of an external force exerted by a manual operator.
• this spring is mounted so that it can hold the pivot shaft in abutment against a longitudinal end of at least one sliding slot in the absence of a force exerted by an external operator.
• the stud In the working position, the stud abuts on the non-vertical wall of the guide light and the spring holds the articulated arm so that it can not slide on the pivot shaft.
• the articulated arm can not spontaneously rotate from the working position to the transport position.
• the spring holds the pivot shaft against a longitudinal edge of the sliding lumen when the articulated arm is in the working position. In the absence of the spring, the articulated arm would slide along the pivot shaft so that the pivot shaft would approach the opposite edge of the sliding lumen, concomitant with the stall of the guide pin of the non-vertical portion of the guide light.
• the spring thus improves the holding of the device by preventing inadvertent movements of the articulated arm relative to the pivot shaft and forms, with the guide pin and the guide lights, the means for locking the articulated arm in the working position.
• each guiding light extends in a plane substantially parallel to the plane in which each sliding light extends.
• This arrangement allows a device according to this variant to have a simple kinematics.
• the articulated arm is pivotally mounted relative to the attachment support at a first end of the arm, said proximal end, and carries the wheel at the opposite end, said distal end.
• the pivot shaft is provided between the guide lights and the wheel.
• the guide pin is a shaft extending on either side of the fixing support.
• the mounting bracket can be of all types.
• the support comprises a rail having a U-shaped cross section, at least one of the side walls of said rail carrying an oblong guide slot.
• the fixing support comprises two sections each having an L-shaped transverse cross-section, an oblong guiding slot being formed in each section.
• the wheel device comprises two guide slots formed in said fixing bracket facing one another.
• these two guide lights are respectively arranged on each of the profiles of the fixing support.
• the proximal end of the articulated arm is housed between the two sections of the fixing support.
• the articulated arm comprises a fork formed of two parallel wings.
• Such a fork has the advantage that it can be machined simply, which makes the device economical to manufacture.
• the latter is preferably housed between the two parallel wings of the fork.
• This arrangement prevents the spring is detached or breaks, being housed inside the fork between the two parallel wings of the fork.
• such an arrangement has a general aesthetic improved compared to devices of the prior art.
• the articulated arm comprises a shaft parallel to said pivot shaft arranged transversely between the flanges of the fork and on which the distal end of the spring is mounted, the proximal end being fixed on said shaft of pivoting.
• the arm comprises an articulated fork formed of two parallel wings.
• the pivot shaft passes through the wings at the proximal end of the articulated arm.
• the distal shaft is housed between the wings at the distal end of the arm, so that the spring can be housed between the two shafts and attached thereto.
• the wheel is mounted on the articulated arm along an axis parallel to said pivot axis.
• the axis of the wheel is parallel to the pivot shaft, which simplifies the kinematics of the device.
• the invention also extends to a garden equipment equipped with a retractable transport wheel device according to the invention.
• the attachment support can be an integral part of the garden equipment.
• the equipment may comprise a chassis incorporating a rail or L-shaped profiles that act as a mounting bracket, in which guide lights and projections are provided. bores for receiving the pivot shaft.
• the invention also relates to a retractable transport wheel device and a garden equipment equipped with such a wheel device characterized in combination by all or part of the characteristics mentioned above or below.
• FIG. 1 is a schematic perspective view of a garden equipment according to one embodiment of the invention on which is mounted a retractable transport wheel device according to one embodiment of the invention
• FIG. 2 is a schematic perspective view of a device according to an embodiment of the invention provided with an articulated arm represented in a transport position,
• FIG. 3 is a schematic perspective view of the device of FIG. 2 on which the articulated arm is in a working position
• FIG. 4 is a schematic perspective view of the device of FIGS. 2 and 3 in which the articulated arm is in an intermediate position between the transport position of FIG. 2 and the working position of FIG. 3;
• FIG. 5 is a schematic side view of a device according to one embodiment of the invention provided with an articulated arm and represented in a transport position,
• FIG. 6 is a schematic side view of the device of FIG. 5 on which the articulated arm is in a working position
• FIG. 7 is a diagrammatic side view of the device of FIGS. 5 and 6 in which the articulated arm is in an intermediate position between the transport position of FIG. 5 and FIG. working position of Figure 6,
• FIG. 8 is a schematic view of a device according to an embodiment provided with an articulated arm partially shown to reveal a locking spring, the arm being in a transport position,
• FIG. 9 is a partial schematic view of the device of FIG. 8, in which the articulated arm partially shown to reveal the spring is in a working position,
• FIG. 10 is a partial schematic view of the device of Figures 8 and 9, wherein the articulated arm partially shown to reveal the spring is in an intermediate position between the transport position of Figure 8 and the working position of the Figure 9 is not fully shown to reveal the spring.
• each part of the retractable transport wheel device is described as it is arranged when the device is mounted on a garden equipment resting on a horizontal flat surface. This arrangement is shown in particular in FIGS. 1 and 2.
• proximal and distal are used relative to the fixation support, when the articulated arm is in the transport position.
• a proximal end of a workpiece is an end of the workpiece in the vicinity of the attachment support, when the articulated arm is in the transport position, while a distal end of the workpiece is a far end of the workpiece support. when the articulated arm is in the transport position.
• a retractable transport wheel device according to a preferred embodiment of the invention comprises as shown in FIGS. support 1 for attaching the device to the garden equipment.
• Such garden equipment can be of all types. It can be a tiller as shown in Figure 1, or a tiller, a brush cutter or any equivalent agricultural equipment.
• This mounting bracket can, according to some embodiments, be integrated directly on the equipment motoculture during the manufacture of garden equipment. It is also possible to machine part of a pre-existing garden equipment to make a mounting bracket of a device according to the invention.
• a device according to the invention also comprises an articulated arm 2 pivotally mounted relative to the support 1 for fixing around a pivoting shaft 8.
• the articulated arm further carries at its distal end, a wheel 4 of transport.
• the articulation of the arm around the pivoting shaft 8 makes it possible to move the transport wheel from a first position, called the transport position, in which said wheel rests on the ground, to at least a second position, called the position of in which said wheel is not in contact with the ground.
• Figures 2, 5 and 8 show the articulated arm 2 and the wheel 4 in the transport position.
• FIGS 3, 6 and 9 showing the articulated arm 2 and the wheel 4 in the working position.
• Figures 4, 7 and 10 show the articulated arm 2 and the wheel 4 in a position, said intermediate position, between the transport position and the working position of Figures 3, 6 and 9.
• the fixing support is according to the embodiment of the figures formed of two sections 6, 7 each having a cross section L-shaped cross.
• the profile 6 comprises a horizontal wall 61 intended to abut against the garden equipment and adapted to receive fastening means, for example of the screw-nut type, for fixing the profile 6 on the equipment.
• this horizontal wall 61 includes lights 62 allowing the passage of fastening means of the screw-nut type, the garden equipment being provided with lights facing to also receive these fixing means of the screw-nut type.
• the profile 7 similarly comprises a horizontal wall 71 having lights for the passage of fastening means for securing this profile to the equipment motoculture.
• these profiles can be pre-existing profiles of the garden equipment on which it is machined the attachment means of the arm 2 articulated on these profiles.
• these profiles 6 and 7 can be an integral part of the chassis of the equipment.
• the horizontal walls 61, 71 can serve as motor attachment interface of the garden equipment.
• the walls 63, 73 vertical, which form a right angle with the walls 61, 71 horizontal define a receiving space of the proximal end of the articulated arm 2.
• These vertical walls 63, 73 form bearings for receiving a pivoting shaft 8 of the articulated arm 2, extending on either side of the walls 63, 73.
• Each wall 63, 73 vertical further comprises a light 64 long guide ob.
• This oblong slot 64 receives a guide pin 9.
• the oblong slots 64 are formed in the chassis.
• the slots 64 oblong walls 63, 73 are arranged facing each other so that the guide pin 9 can extend horizontally on either side of the two walls 63, 73 vertical, passing through the guide lights 64.
• Each guide light 64 has a general half-hexagon shape.
• the width of the guide light 64 is for example 10% greater than the diameter of the guide post 9. Such a proportion allows the guide pin 9 to move in the guide light but without introducing too much play.
• the guide light 64 is formed in each wall 63, 73 vertical so that the main direction of the light forms with the vertical an angle of 10 ° to 30 °.
• This guide light 64 has a shape adapted so that the guide pin 9 can enter, in said transport position, abutting against a portion of the fixing support delimiting a first end of this guide light, and in the working position. in abutment against a portion of the fixing support delimiting the opposite end of this guide light.
• the end zones of the guide light 64 also form, with the guide post 9, means for locking the articulated arm 2 in the working position.
• the articulated arm 2 comprises a fork 10.
• This fork 10 comprises two wings 11, 12 parallel.
• the proximal end of the wings 11, 12 are traversed by the guide pin 9.
• This guide pin 9 is fixed relative to the wings 11, 12 of the arm 2 hinged.
• Each wing further comprises an oblong slot, called sliding slot 13, through which the pivoting shaft 8 passes.
• Each light extends generally in the main direction of the fork 10.
• the articulated arm 2 can thus slide on the pivoting shaft 8 during the movement of the articulated arm 2 from the transport position to the working position and vice versa.
• the guide pin 9 being constrained in its movements by the guide lights 64, the pivoting of the articulated arm 2 is only possible if the articulated arm 2 can slide on the pivot shaft 8.
• FIGs 4, 7 and 10 show the articulated arm 2 in an intermediate position between the transport position and work and on which we can observe the relative displacement of the pivot shaft 8 in the sliding slots 13.
• a spring 14 is further arranged between the two wings 11, 12 of the fork 10.
• the proximal end of the spring 14 is fixed to the pivot shaft 8 and the distal end of the spring 14 is fixed to a shaft 15. extending between the two wings 11, 12 of the fork and fixed relative thereto.
• the spring 14 is chosen so that it is in slight traction, when the pivoting shaft 8 is in abutment against the distal end of the lumen 13.
• FIGs 8, 9 and 10 show the spring 14 during the displacement of the articulated arm 2 from the transport position to the working position.
• the spring 14 is in a slightly tensile position to hold the pivot shaft 8 against the distal end of the sliding lumen 13.
• the stiffness of the spring must be sufficient to prevent spontaneous pivoting of the articulated arm 2 from the working position, as shown in FIG. 9, to the transport position, as represented in FIG. 8.
• Simple routine tests allow the skilled person to determine the stiffness of the spring 14 compatible with the weight of the wheel and the articulated arm used.
• the articulated arm 2 further comprises an axle 16 carrying the wheel 4.
• axle 16, the shaft 15, the pivot shaft 8 and the guide pin 9 are all parallel.
• a retractable transport wheel device may comprise an articulated arm formed of a flat shaft comprising a sliding slot traversed by a pivot shaft.
• the fixing support comprises a single guiding light arranged cooperating with a tenon of guidance carried by the flat shaft.
• Such a device can for example equip small equipment light agricultural.

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• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Soil Sciences (AREA)
• Environmental Sciences (AREA)
• Handcart (AREA)
• Jib Cranes (AREA)

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• 2010
  • 2010-06-01 FR FR1054275A patent/FR2960382B1/fr not_active Expired - Fee Related
• 2011
  • 2011-06-01 EP EP11722465.9A patent/EP2575420A1/de not_active Withdrawn
  • 2011-06-01 WO PCT/EP2011/059046 patent/WO2011151376A1/fr not_active Ceased
  • 2011-06-01 RU RU2012153697/13A patent/RU2569967C2/ru not_active IP Right Cessation
  • 2011-06-01 CN CN201180038285.2A patent/CN103118526B/zh not_active Expired - Fee Related

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