FR2782598A1 - Plough for towing behind tractor, has main plough beam frame fitted with pivot in central part, with vertical axis to allow frame to be used in line or in folded back position - Google Patents

Abstract

The plough consists of a plough head (7), a frame (9), supporting the working bodies (5), divided along two planes, situated one above the other and below the frame. A pivot device (6) is fitted to allow the frame to rotate. The frame is formed in two parts, with the forward part (9a) linked to the plough head and the rear part (9b) linked to the forward part by a pivot (1), with a vertical axis, which allows the rear part of the frame to be in line with the forward part or to be folded back towards the line of the plough head.

Description

The present invention relates to a plow mounted

automatic alignment.

  We know that the mounted plows are devices of the type which attaches to the rear of a tractor and which supports plow bodies to work the soil over a certain width during

the advancement of the tractor.

  In general, the plowing bodies are fixed on a chassis which

  is made up of a long straight beam.

  This beam is mounted on a plow head which attaches to the rear of the tractor and is preferably pivotally mounted on the tractor or it comprises a rotation device, while the chassis supports plowing bodies which extend over two parallel planes above and below the plow, the plow bodies

  of one plane being oriented opposite the plowing bodies of the other plane.

  When the tractor is advancing, only the plow bodies of the lower plane work. When the tractor arrives at the edge of the field and it has to turn around, the chassis is turned over so that the plow bodies which were at rest move into the working position. So, regardless of the direction of the tractor crisscrossing the field in both directions, the earth is always poured the same

side by the plowing bodies.

  It is understood that it is advantageous that such a plow has a certain width, which makes it possible to limit the number of passages required in one direction and in the other to cover the entire

surface of a field.

  However, an excessive width of plow presents the

following disadvantages.

  First of all, the center of gravity of the plow is distant from the longitudinal axis of the tractor, which is generally coincident with the pivot axis of the plow, which poses problems of balance, on the one hand when the plow is raised and the tractor is maneuvering, on the other hand and above all, when the plow is turned over. In addition, the overall dimensions of the convoy formed by the tractor and its plow are very large and limit the possibilities of

  movement of this convoy on the road.

  The present invention aims to resolve these drawbacks and

  others which will appear in the light of the description which follows.

-2- 2782598

  The present invention relates to a mounted plow of the type comprising a plow head, a chassis supporting plowing bodies distributed on two planes located one above, the other below the chassis and oriented in opposite directions. one plane to the other and a pivoting device allowing the chassis to be turned over, characterized in that the chassis consists of two parts, namely a front part which is connected to the plow head, and a rear part which is connected to the front part by an articulation whose axis is vertical when the plow is in the working position, articulation which allows the rear part of the plow to assume a folded position in which it is brought closer to the pivot axis of the plow and a working position in which it is located in the extension of the front part of the plow. In one embodiment of the invention, the movement of the rear part of the chassis is controlled by a double-acting hydraulic cylinder which is capable of bringing the rear part of the chassis from its working position to its folded position and from its position

folded back to its working position.

  In a preferred variant of this embodiment, a hydraulic control unit is mounted on the plow head and actuates the double-acting hydraulic cylinder at the time of the overturning of the plow, thus controlling the movement of the rear part of the chassis. This preferred variant has the essential advantage that the operation consisting in folding down the rear part of the chassis takes place automatically during the overturning of the plow, without the operator having to perform any additional maneuver and without any grip. no additional hydraulics are required on the

tractor.

  In another variant, the hydraulic control unit of the double-acting hydraulic cylinder brings the rear part of the chassis

  in the folded position as soon as the plow is raised.

  Thus, the width of the plow is automatically reduced, not only when it turns over, but also when crossing an obstacle requiring a plow lift, when the tractor is traveling on the road and during storage. of the tool. In order to better understand the invention, we will now describe an embodiment given by way of non-limiting example, with reference to the accompanying drawing in which: - Figure 1 is a top view of a mode embodiment of the plow according to the invention in the folded position, and - Figure 2 is a view similar to Figure 1 of the

plow in working position.

  The plow shown in the drawing comprises a plow head (7) which is intended to be fixed to a tractor (not shown), a turning device comprising a pivot axis (6), a line setting adjustment device (8) and one

chassis (9).

  The chassis consists of two beams (9a and 9b) joined by a joint (1) whose axis is vertical in the position

represented from the plow.

  We see that the articulation (1) allows the rear part (9b) of the chassis to take either a folded position, shown in Figure 1, in which it approaches the axis of rotation of the plow, or a position of work in which she trains with

  the front part (9a) of the chassis, a straight chassis.

  The front part (9a) of the chassis supports three pairs of plow bodies (5) distributed in each pair on planes located above and below the chassis and the rear part (9b) of the chassis

supports four.

  A double-acting hydraulic cylinder (2) brings together two wings (10a and 10b) each secured to a part of the chassis and makes it possible to maneuver the rear part (9b) of the chassis to bring it into

  either of its two positions.

  A fixed stop (3) is used to hold the chassis in the working position by joining the two ends of the wings (10a and 10b) together. In a variant not shown, the fixed stop (3) is eliminated and replaced by a nut and a lock nut engaged on the double-acting cylinder (2) to immobilize it axially in the position

of work.

  Another double-acting cylinder (4) allows the

tilt adjustment.

  - 4 - In the drawing, the hydraulic circuit has not been shown

for actuating the cylinders.

  It is understood that the embodiment which has just been described does not have any limiting nature, and that it can receive any desirable modifications without departing from the scope of this.

of the invention.

Claims (2)

  1. Mounted plow of the type comprising a plow head (7), a chassis (9) supporting plowing bodies (5) distributed on two planes located one above, the other below the chassis and oriented opposite from one plane to another and a pivoting device (6) allowing the chassis to be turned over, characterized in that the chassis consists of two parts, namely a front part (9a) which is connected to the plow head, and a rear part (9b) which is connected to the front part by an articulation (1) whose axis is vertical when the plow is in the working position, articulation which allows the rear part of the plow take a folded position in which it is close to the pivot axis of the plow and a working position in which it   is located in the extension of the front part of the plow.   2. Plow according to claim 1, characterized in that the movement of the rear part (9b) of the chassis is controlled by a double-acting hydraulic cylinder which is capable of bringing the rear part of the chassis from its working position to its folded position and   from its folded down position to its working position.