FR2484767A1 - HAYMAKING MACHINE - Google Patents

Abstract

THE UPWARD MOVEMENT OF THE EXTERIOR ROTARY SPREADERS 4, WITH A VIEW TO RAISING THEM FROM THE WORKING POSITION 6, 6, 6 TOWARDS THE TRANSPORT POSITION, IS CONTROLLED BY A HYDRAULIC THRUST CYLINDER 1 WHICH ACTS ON A LIFTING BRACKET THANKS TO AN INTERMEDIATE BODY 3.

Description

The present invention relates to a machine

for haymaking with at least two relative spreaders

  tifs which are provided with working members such as, for example, forks or the like distributed over the circumference and rotating around substantially vertical axes while being inclined forwards towards the ground, the external rotary spreader (s) being able to

be lifted hydraulically. -

  The hydraulic lifting of the ro-ro spreader (s)

  aims to reduce the greater width than the

  haymaking machine present during work to obtain

have a smaller width during transport.

It is known to use for this purpose hydraulically controlled traction cylinders. The disadvantage of this embodiment is the higher price of

  traction cylinders compared to that of push cylinders

  complicated construction and control

  due to the inertia of the oil and the design of the cylinders.

The object of the present invention is to allow pivoting of the rotary spreader (s) from the working position in which they can be adapted.

  freely to the unevenness of the ground, towards a position of trans-

  port in which they are collected, using

rinses of thrust preferably controlled by oil under pressure and which act in a simple way on a wheelhouse

lifting.

  The above problems are solved by the fact that the upward movement is controlled by a push cylinder

actuated by a pressurized fluid acting on a timo-

lifting lifting by means of an intermediate member which allows total mobility to be obtained in any working position. The advantage of the embodiment according to the invention lies in the simple design of the lifting linkage and of the intermediate member allowing

  to ensure complete freedom for external rotary spreaders

laughers when these are in their working position as well as a rapid adaptation of the spreaders to uneven ground, and to lock, by known locking elements, the rotary spreaders during transport

  to prevent them from accidentally folding down.

  Various other features of the invention

moreover emerge from the detailed description which follows.

An embodiment of the object of the invention is shown, by way of nonlimiting example, in the accompanying drawing.

The single figure is a rear view, considering

rant the direction of movement of a haymaking machine

according to the invention.

  The external rotary spreaders 4 are articulated so as to be able to pivot approximately vertically, at a

support frame 9 .. When actuating a push cylinder

  sée 1 a lifting linkage 2 is caused to pivot around the axes 10. The external rotary spreaders 4 are then caused to pivot, by means of the intermediate members 3, by

  working position 6, 6 ', 6 "to the trans-

  port 8 in which the frame 7 carrying the ro-spreaders

  4 is locked. The lifting stroke is limited by a stop inside the push cylinder 1 or by the stop 5 shown in the drawing. The location of the stopper is chosen so that the center of gravity of the spreaders

external rotary 4 is located outside the vertical

  wedge when the latter are raised in the position of

  transport to allow the spreaders to return automatically

  towards the working position as soon as the lock

the age is canceled. The intermediate member 3 can be cons-

  formed by a cable, chain or steel rod present

  both an oblong hole or by a similar element.

Claims (8)

1 - Haymaking machine with at least   two rotary spreaders which are fitted with working members vail such as, for example, forks or the like distributed over the circumference and rotating around substantially vertical axes while being inclined forward towards the ground, the rotary spreader (s) hydraulically liftable exterior, characteristic that the lifting of the external rotary spreaders   laughing (4) is controlled by a thrust cylinder (1) action- born by a pressurized fluid.   2 - Haymaking machine according to claim 1, characterized in that the thrust cylinder (1) is controlled hydraulically by oil.   3 - Haymaking machine according to one of the claims   cations 1 and 2, characterized in that the thrust cylinder (1) is single acting.   4 - Haymaking machine according to one of the claims cations 1 to 3, characterized in that the intermediate member   (3) allows total mobility to external rotary spreaders   laughers (4) in any working position (6 ', 6 ") of these. - Haymaking machine according to one of Claims 1 to 4, characterized in that the intermediate member (3) consists of a cable, a chain, a steel rod having an oblong hole or by a similar element. 6 - Haymaking machine according to one of the claims   cations 1 to 5 comprising at least four rotary spreaders,   characterized in that the two external rotary spreaders laughers are raised by means of a single push cylinder (1). 7 - Haymaking machine according to one of the claims   cations 1 to 6, characterized in that the end position of the frame (7) carrying the rotary spreaders is delimited, in the transport position (8), either by a stop inside the thrust cylinder (1 ) or by an external stop (5) which delimits the stroke of the lifting linkage (2) or of the frame (7) carrying the 248476? rotary spreaders. 8 - Haymaking machine according to one of the claims cations 1 to 7, characterized in that, in the transport position (8), the angle formed by the frame (7) carrying the rotary spreaders and the vertical is calculated so that the center of gravity is located externally with respect to the vertical.   9 - Haymaking machine according to one of the claims cations 1 to 8, characterized in that the frame (7) carries as long as the rotary spreaders are locked in the posi- transport tion.