FR2584888A1 - Automatic rotary manual spade - Google Patents

Abstract

The invention relates to a device which allows the user to plough the ground, saving effort and movement by an alternating rotation. It consists of a drive handle 1, of a protective cap 3 and of a "clod-breaking" grid 5 fixed to a chassis 2 which fits onto a clip-in system 6. When the user actuates the handles 1 and controls the advancement and penetration by a force on the pressing pedal 8, the driven assembly, composed of a cylinder 7 and of teeth 4, is rotationally driven and finely ploughs the soil. The device according to the invention is particularly intended for gardening in places not easily accessible and for agriculture as a leisure activity.

Description

 The present invention provides a manual tool, intended for agriculture, which allows the user to plow the soil by an alternating rotary movement.

With a traditional spade, several phases are necessary in order to obtain a correct plowing: tool booming, take-off of the clod of torre lifting, turning and shearing of oelle oi.The repetition of these periods requires the user an expense of significant energy, in uncomfortable positions and, generates a strong physical fatigue and a
inevitable "kidney pain" due to the torsional work of the vortex column. On the other hand, the volume of the clod of earth, limited by its weight,
The foroe and the resistance of the user, defines a furrow width
and a variable plow tomography according to the individuals.

The apparatus according to the invention simplifies the phases, the novelties, reduces
the necessary efforts, ooci, in ergonomically optimal positions.

The speed of execution and the increase in the cultivated volume are
to a better efficiency and a decrease in the working tomps.

 The tool has two linked sets, one leading and the other led.

The drive assembly consists of two multiplier drive arms
of efforts, fixed on a chassis comprising a "clodbreaker" grid and a
protective cover. This structure fits on an enoliquing system
which pereet to rotate the driven assembly.

This consists of a cylinder supporting rows of teeth
arranged to ensure maximum ground penetration and forward
automatic tool feedback.

A support pedal is articulated on the link between the leading assemblies
and led and, allows to control the penetration and the advance of the device.

When the user presses on the pedal, blocking the advance of
the machine and, moves the drive arms, the toothed oylindre rotates and
the teeth penetrate the ground. When the levers are pushed back, effortlessly
by the snap system, the toothed drum remains in position.

The repetition of 0e alternative movement promotes penetration into
floor. When it is sufficient, a loosening of the force on the support pedal creates a teeth / ground mesh and a translation in oylin
dre toothed and support pedal.

The arrangement of the rows of teeth around the cylinder allows a fine milling of the soil. However, a grid composed of rods which are inserted in the intervals of the teeth, crushes the norcoaux residues this filter
pebbles: vt herbs.

According to a preferred embodiment, the drive arms
are made of wood or aluminum alloy tiles. Leoapot protection can be made of plastic. The "clod break" grid, the obassis,
the support pedal can be made of aluminum alloy and the basic teeth
cylindrical can be formed in forged acder and be hardened. This one
are fixed on a cylinder which can be tubular, made of it and has a filling orifice and holes for discharging fertilizer or e-monoes. This tube is closed by two flanges which can be of steel and
supporting sockets which facilitate the connection with the systems of
rattling which may preferably be of the "inverting ciliquet" type.

According to variants, the cylinder can be a solid axis, in aoier, peroé
or grooved, on which the donts are positioned. At each end
square end caps can be made for fixing the systems
latching.

These can use a torque multiplier set,
to gear and ratchet or "freewheel" type systems or
hydraulic mechanisms.

THE teeth can between forged with a triangular body and in rows
complete.

The accompanying drawings illustrate the invention:
Figures 1 and 2 show, in front and left view,
the complete device according to the invention.

Figure 3 shows the chassis, the protective cover and
than the "clod break" grid.

Figure 4 shows the assembly oylindre and teeth and the dis
position of these.

 Figure 5 details in section a version of the cylinder.

 Representation 6 shows a variant of this cylinder.

 Figures 7 and 8 show solutions of teeth.

Figure 9 shows schematically the support pedal
Figure 10 defines a variant of the cylinder and 6th rows of
teeth.

The apparatus defined by Figures I and 2 comprises two linked sets%
one command, the other working.

The control assembly consists of t
Two drive arms (1) of the order of 1.3 meters for
the length and about 3 oentimeters in diameter, are assembled so
can be dismantled on the chassis (2), takes up around 35 centimeters
for the height, 40 centimeters for the width and 60 centimeters for
the length. A protective cover (3), of the order of 60 can timeters in length, 40 centimeters in width and 5 millimeters in thickness, as well as a "block clod" grid (5) composed of rods. about 8 millimeters in diameter and 15 centimeters in length, are fixed to the ohassis (2) as shown in Figure 3.r this subassembly thus formed, a snap-fit system (6) is assembled inversion.

The length of the levers thus roéée allows with a less effort of
drag the work assembly in rotation.

The snap-in systems (6) fit onto an oylindre (7) which
according to the embodiments of Figures 4 and 5 has dimensions of the order of
40 centimeters for the length and about 8 centimeters for the diam-
be. air this oylindre (7) are fixed forged teeth (4) which, according to
Figures 7 and 8 have dimensions of the order of I2 millimeters for the dia
meter and 23 centimeters in length.

At the level of the labeling system (6) / oylindre (7).

is articulated use e support pedal (8) shown schematically in Figure 9 and having an enoom
howling about 45 centimeters for the width, 70 centimeters
for the length and 20 centimeters for the height.

In the form of remlisation of Figure 5, the cylinder (7) is tubular
and closed by two flanges (I2) with sockets (II) where the
enoliquing systems (6). The teeth (4) do not center in the holes (13)
filling and evacuation crifices (10) allow dispersion
fertilizer or seed during plowing.

According to the variant of FIG. 6, the cylinder (7) is a solid axis where
are drilled centering holes (I3) where the teeth are positioned
(4). Two square ridges are machined at its ends for the interlocking of
enoliquing systems (6).

The cylinder (7) can in the embodiment according to Figure 10
be grooved along its length approximately every 45 degrees. In this case,
rows of three to four teeth are fixed alternately.

L The length of the levers formed by the arm (1), chassis (2) assembly,
latching system (3), is such that the effort required by the user
to rotate the working assembly (cylinder (7) and teeth (4)
is less despite the width and depth of the furrow.

The force exerted on the support pedal (8) is intended to contro @@ la
penetration of the teeth (4) into the solet 7 coordinate the advance of the tool.

Earth socks not broken during rotation and penetration
teeth (4) are crumbled by the grid (5).

Thanks to the reversible snap-on systems (6) and the shape of the teeth (4), the device can roll on the ground when moving around the workplace. The support pedal then being attached to the chassis (2).

 The tool according to the invention is particularly intended for agriculture in difficult places of access and for leisure agriculture.

Claims (6)

 tcada 1) composed of oylindre (7) provided with alternating rows of teeth (4).  characterized in that it comprises a control assembly operated by the user and a working assembly, the control assembly consisting of removable drive arms (I) and a protective cover (3) fixed on a ohassis (2) comprising a "clod breaker" grid (5) Cechassis (2) being fitted and detachably linked on a latching system (6) with reversible ratchets Co-lamination system (6), by a removable link on which a support pedal (8) is articulated, drive in rotation, when the arms (1) are actuated, the assembly of I) Manual tool for plowing the soil with an alternating rotary movement 2) Device according to claim I characterized in bone that the oylindre (T) is tubular and oomporte a filling orifice (9) and evacuation holes (10) as well as centering (I3) and attach teeth (4 ). 3) Device according to claim I or 2oaraotérisé in oe that the oylindre (7) is a solid axis pierced with centering (I3) becoming teeth (4) forged and comprising of. square end caps.  4) Device according to any one of the preceding claims, oaraoterized in that the cylinder (7) is grooved in its length every 45 degrees approximately in these grooves being flxed with complete rows, alternate, of 3 and 4 approximately dants ( 4).  5) Device according to claim S characterized in that the system  enoliquette (6) is a drive with torque reduction  or of the typeongrenages and ratchets or, by free rotation, or by a hydraulic mechanism 6) Device according to one of claims I or 2 or 3 or 4 characterized in that the teeth (4) are formed by forgange and have a cylindrical rod or a triangular structure.