FR2589310A1 - Hydraulic spade - Google Patents

Abstract

The invention relates to mechanisation of a spade capable of being used by gardeners and nursery gardeners. It consists of a shaft 18 equipped with a handle 17. A dual-action jack (power element) and a distribution (control) assembly are entirely contained in 18 and 17. A tractor or an autonomous pump supplies hydraulic pressure by means of flexible hoses 8. The distributor, by means of a slide valve and of a pull rod 3, makes it possible to control the supply to the jack, so as to obtain the raising or penetration of the spade. The tool 25 is given a rotational movement at the end of the travel so as to turn the soil over.

Description

TECHNICAL DESCRIPTION
The proposed study concerns a preliminary draft of BECHE
hydraulic.

This material makes it possible to replace the traditional spade,
completely manual. In particular, for some uses,
not allowing immediate access to heavy equipment (tractor). It is
most likely that some professions are directly interested
by this material: gardeners, nurserymen.

The file contains as an annex an overall plan representing
a longitudinal section, as well as 2 partial AA sections. A
nomenclature is also attached.

the functional study of the device shows a
together (see plan and nomenclature attached) formed of a handle 1, 17,
18, in four parts. A top handle helps maintain
the tool of the right hand, a central handle of the left hand. For
left-handed, the position of the handles is reversed, without problems.

-The energy source is hydraulic, and the power element
used perhaps the lifting system of a tractor, equipped with a
pump-distributor set 3 voices. The fluid is driven by
flexible 8 s outer 10 mm connected to the inlet and outlet of the
double acting cylinder (14) and (15) by quick couplings. In the study
the hose length envisaged is 4 meters.

The tool (25) can easily be replaced by a fork, to
using an easy-maneuvering device: pin (24). This material
is standard and frequently used in agriculture.

The supply of the jack (14) (15), allowing the descent of
the tool is provided by the fiexible (8). The distributor is also
wired controlled by a pull tab (3). This cable is guided by a
guide (7). The recall of the zipper is directly obtained by the spring
distributor (
CABINTERISTICS OF THE POHPE VERIN
- piston diameter: D = 12 mm
- stem diameter: D = 8 mm
- stroke: 190 mm
- speed of descent of the rod: 4 m / mm;
- pump pressure: base of 120 bar
- Pump flow rate: 7.2 cm3 / s.

 Under these conditions, it is assumed that the force exerted on the tool at the time of descent will be 100 daN; and at the time of the ascent of 55 daNs.

 The ascent rate of the tool will be twice as great as the rate of descent.

 The watertightness of the hydraulic assembly is obtained by means of flat gaskets, and O-rings, according to the constructive arrangements and the parts forms.

 The end of the handle carries a fork (21) to which the tool is attached. The translational guidance of the yoke is obtained by a pin (23). At the end of the stroke of the piston, when the spade is pressed into the ground, the stand (22) comes to bear. ground. At this moment, the worker presses on the two handles in order to tilt the whole.

 At the same time, a helicoidal boom of the fork causes a rotation of the tool, which allows the earth to fall beside the hole made. The movement of the whole is controlled entirely by the zipper (3) and is not necessarily complete. The stand (22) also allows the user to prevent the raising of the tool, by a foot support, to facilitate penetration into the ground.

 In order to give more autonomy to the device, we can consider a variant that would use a tiller, as a power source. A pump-distributor tank assembly would be connected to a power take off of the tiller. A capacity of 2 liters would be required for the tank. Several tools can be connected in parallel. (use case by nurserymen).

 According to a variant, it is possible to replace the hydraulic energy by pneumatic energy. In this case, a compressor assembly would replace the pump on the tiller.

Claims (3)

R E V E N D I G A T IO N S  1 - The hydraulic spade is intended to carry out work of uprooting and planting. It is characterized by a handle in which is located a double acting cylinder (14) and (15). The hydraulic power circuit is provided by a nearby tractor. During penetration of the tool (25) into the ground (down the piston) the user keeps the foot resting on the stand (22). At the end of the race the spade turns around, knocking the ground down.  2 - Device according to claim 1, characterized in that the control of the cylinder is provided by a 3-way distributor, also housed in a handle of the tool.  3 - Device according to claims 1 and 2, characterized in that the piston rod (15) is connected to an element (21) guided by (23) in translation and rotation for the end of the race

<Tb> <tb> <SEP> BECHE <SEP> HYDRAULIC <tb> MARK <SEP> NUMBER <SEP> DESIGNATION <tb> <SEP> 1 <SEP> <SEP> l <SEP> Upper <SEP> Upper <SEP> eur <SEP> <tb> <SEP> 2 <SEP> Ring <SEP> ~~~~~~~~~~ <SEP> ~~~~~~~~ <SEP> <tb> <SEP> 3 <SEP> I <SEP> SEP <SEP> <SEP> <SEP> SEP> Dispatcher <tb> <SEP> 4 <SEP> 1 <SEP> Stopper <tb> <SEP> 5 <SEP> 1 <SEP> <SEP> Stem <SEP> of <SEP> <SEP> Command of <SEP> Distributor <tb> <SEP> <SEP> <SEP> Spring <SEP> Reminder of <SEP> Drawer <tb> <SEP> 7 <SEP> 1 <SEP> Guide <SEP> cable <tb> <SEP> 8 <SEP> 2 <SEP> Flexible <tb> <SEP> 9 <SEP> 1 <SEP> <SEP> check valve <SEP> back <SEP> oil <tb> <SEP> 10 <SEP> 7 <SEP> SET <SEP> of <SEP> Distribution <tb> <SEP> 11 <SEP> 1 <SEP> Drawer <tb> <SEP> 12 <SEP> 2 <SEP> Joint <SEP> Flat <SEP> ~~~~~~~~~ <SEP> <tb> <SEP> 13 <SEP> 2 <SEP> Joint <SEP> toric <SEP> <tb> <SEP> 14 <SEP> 1 <SEP> Cylinder <SEP> of <SEP> cylinder <tb> <SEP> 15 <SEP> 1 <SEP> Piston <tb> <SEP> 16 <SEP> 2 <SEP> Joint <SEP> O-ring <tb> <SEP> 17 <SEP> 1 <SEP> Handle handle <tb> <SEP> 18 <SEP> i <SEP> <SEP> Tankhandle <tb> <SEP> 19 <SEP> 1 <SEP> <SEP> Tubing of <SEP> Oil Flow <SEP> <tb> <SEP> 20 <SEP> 1 <SEP> Socket <SEP> Lower <tb> <SEP> 21 <SEP> 1 <SEP> Sheath <tb> <SEP> 22 <SEP> 1 <SEP> Support Stand <SEP> <tb> <SEP> 23 <SEP> 1 <SEP> elastic pin <SEP> 8 <tb> <SEP> 24 <SEP> 1 <SEP> <SEP> SEP> <SEP> Link <SEP> <SEP> BE <SEP> Link <tb> <SEP> 25 <SEP> 1 <SEP> Beche <SEP> or <SEP> fork <tb> <SEP> 26 <SEP> 1 <SEP> Joint <SEP> O-ring <tb> <SEP> 27 <SEP> i <SEP> <SEP> Nut <SEP> HMG <SEP> and <SEP> Washers