FR2662908A1 - MACHINE FOR FENAISON. - Google Patents

Abstract

The invention relates to a machine for haymaking. In this machine comprising a transverse frame (6) carrying working rotors (1) which are supported on the ground by rollers (13) and whose sides can be raised in the transport position and which is connected to a longitudinal frame ( 2) the rear end of which carries a cross member (19) equipped with wheels (20), the latter are arranged so as to be able to pivot freely in the working position and have a locking device. Application to forage and hay harvesting machines.

Description

The invention relates to a haymaking machine comprising a frame

  transverse, which carries the working rotors, which bear on the ground by means of support rollers and whose outer parts, located on both sides, can be raised by tilting in the

  transport position and which is connected to a longitudinal frame

  tudinal can be coupled to the tractor and on the rear end of which is mounted a support arm

having a couple of wheels.

  In these haymaking machines, it is often sought first to have a high surface yield, which has the effect that the working width increases more and more. For this purpose, the number of

  In addition, we can increase the di-

  meter of withering tools of each working top.

  Naturally the adaptation to the ground suffers from the increase in the working width of the machine, which has a deleterious effect especially in the case of an uneven ground and in inclined positions Therefore, we have already mated coast side by side two haymakers and we obtained a useful adaptation to the unevenness of the soil by means of an articulated connection between the two apparatuses. Usually, the framework of the machines for the haymaking is supported and

  guided by wheels below the working tops.

  However, since it is necessary to effectively reduce the

  machine on the road and for this purpose it is necessary to raise the outer elements of the frame, present on both sides, is provided, behind the frame carrying the working rotors, an additional chassis, whose wheels support , in the transport position, support and guidance of the machine These transport wheels are fixed rigidly so that the machine is guided

  almost like a one-axle trailer

  the machine that pulls it on the contrary, the wheels

  are arranged so that they can rotate freely

  below the working rotors, which guarantees a perfect monitoring of the machine during the work. The rigid transport wheels generally prevent the rotation of such machines, and the latter therefore require a relatively large turning radius. This disadvantage is solved by the device according to EP-A-0 316 896, in that the wheels are controllable. The control displacement is derived from the respective angle between the drawbar of the machine and the towing vehicle.

  control can act both mechanically and hydraulically

  This device essentially corresponds to a

  known device in the case of plows polysoc for la-

  The wheel control device is an expensive construction Because of the play that necessarily appears between the various control device connection elements, the machine monitoring for haying is generally disordered In the case of this arrangement has the effect that practically all of the guidance of the relatively heavy apparatus has to be handled only by the wheels, since the support rollers freely oscillate beneath the working rotors. this arrangement

  proves a particularly important disadvantage

  during the recoil because it poses to the driver of the traction machine unusual steering problems due to

of the imposed wheel control.

  Therefore, there is an urgent need for

  remedy these disadvantages with the aid of a

  positive which allows perfect guiding and support of the machine even under adverse soil conditions

  and / or terrain and ultimately improves the characteristics

  transport and achieves this result by means of an advantageous and uncomplicated

  Indeed, the invention provides that in a machine for the

  of the type indicated above, the wheels are arranged so that they can rotate freely in the position of

  and have a locking device

  proprié, the support rollers are mounted rigidly and can not rotate, in this device The adjustment, which is either rigid or pendulum, the wheels has the advantage of allowing a perfect guiding of the machine both in the working position , in which a high degree of rotational capacity is required, while the transport position requires a fixed and reliable guide of the machine behind the tractor The device according to the invention proves, in a surprising way, particularly

  suitable for support rollers which are arranged

  There is a tandem arrangement below the working rotors, since with this axle arrangement, freely rotating or pendulum-bearing wheels can be mounted only at a very high construction cost.

  It is within the scope of the invention that the

  locking device is connected to a device that can

  tilt the wheels into the transport position.

  This arrangement makes it possible to switch at will

  wheels in the respective position of service and the

  once the corresponding position is reached, so that they then rigidly guide the frame of the machine According to another characteristic of the invention, this tilting device may comprise at least one jack

  installed on a support

  tipping is of particular use

  convenient In its place, one can naturally also use

  a mechanical locking system.

  It has been particularly appropriate for the locking and tilting device to be coupled to the

  device for lifting lateral transverse frames

  ral. It is also within the scope of the invention to prevent unintentional loosening of the lock when, for example, the connection valve is opened to the tractor to unload the hydraulic line during

  transport Windrowers are locked mechanical-

  in the position of the frame elements, raised for transport, so that they remain in the position

  raised even when the return line is open.

  For the lowering, we remove the lock using

  of a cable To also securely hold the lock

  hydraulic wheel, in the hydraulic line

  for the locking cylinders is incorporated a shut-off valve

  cage, which, by means of a mechanical connection with the swather frame, blocks the pipeline when the swather is in the raised state so that, when the tractor connection valve is open, the part of the hydraulic line, which connects the blocking valve to the blocking cylinders, remains closed When the windrowers are allowed to fall, the blocking valve opens in the opposite direction In order to obtain a safe final position of the actuating cylinders for blocking wheels, a non-return valve is connected in parallel with the

  In this way, even in the case where the

  Pope blocking is already closed, we can still get

  the application of the complete hydraulic pressure to the

blocking rins.

  Other features and advantages of the

  will be apparent from the following description of a

  preferred embodiment of the invention as well as

reference to the drawing.

  Figure 1 shows a plan view.

  Figure 2 shows a side view of

  ral of a machine for haying, arranged according to the invention. Figure 3 shows in detail a side elevational view of the locking device for a wheel; and

  Figure 4 shows a plan view of this

positive blocking.

  The haymaking machine, which is shown in the drawing, comprises two working rotors 1 on both sides of the longitudinal frame 2, the front portion 3 of which is bent downwards and has a transverse arm 4 for connection to the lower articulated arms. of the three-point hitch of a tractive machine The transverse arm 4 can swing about the vertical bolt 5 relative to the longitudinal frame 2 to the longitudinal frame 2 is

  fixed connection of a transverse frame, which is

  globally with the reference 6 and is thus constituted by the two parallel legs 7 On the latter are articulated on both sides, outer frame members 9, which can tilt about horizontal axes 8 and each carries one of The latter are constituted by the driving head 10 and the furring arms 11 mounted on this head and whose working tools 12 are rotated so that a portion of the periphery of the tools 12 in form of teeth is in contact with the ground and these tools jointly collect the crop, while they can be raised on another part of their circumference and deposit the harvest

in the form of a swath.

  Support rollers 13 are arranged below each working rotor. In the embodiment shown in the drawing, they are arranged in pairs in a tandem arrangement. The drive of the working rotors 1 is made from the power take-off. from the tractor, via an articulated shaft 14, to the shaft

  15, and via the transmission

  central section 16 and articulated shafts 17, present on both sides, up to the drive heads 10 The support rollers 13 located below the rotors 1 are mounted

rigid and can not rotate.

  On the rear end 18 of the longitudinal frame 2 is rigidly fixed a transverse support 19, at the two outer ends of which are mounted respectively a wheel 20 pivotable about a vertical axis 21 Au-

  below the transverse support 19 is fixed, on each side, a

  22, and a pusher 24 is attached to the deployable piston rod 23 of these cylinders On the shaft 21 of the

  wheel 20 is fixed a lug 25 which extends transversely

  relative to the transverse support 19 and carries,

  at both ends, respective idle rollers 26.

  The distance between the two rollers 26 corresponds substantially to the width of the pusher 24 of the hydraulic jack 22, so that, when the piston rod 23 is deployed from the rest position represented by a line in line

  in FIG. 4, this pusher is applied in

  This causes the shaft 21 of the wheel 20 to lock in the position shown on FIG.

  FIGS. 3 and 4, which corresponds to the position of trans-

  port, and thereby the wheels 20 are rigidly adjusted and then provide reliable guidance of the machine in the transport position.

  obvious, there was no detailed representation of an accu-

  between the hydraulic jacks 22 for locking the wheels 20 and the device, made in a conventional manner, which serves to raise the outer frame portions 9 of the

  transverse frame 6, which carry the working rotors 1.

Claims (6)

  1 Haymaking machine comprising a transverse frame (6) carrying the working rotors (1) which bear on the ground by means of support rollers (13) and whose outer parts on both sides can can be raised by tilting in the transport position and which is connected to a longitudinal frame (2) which can be coupled to the tractor and on the rear end of which is mounted a crossmember (19) having a pair of wheels (20), characterized in that the wheels (20) are arranged so as to be able to pivot freely in the   working position and have a locking device.   2 haying machine according to claim 1, characterized in that the locking device is connected to a device which tilts the wheels (20) in the transport position.   3 haying machine according to claim 2, characterized in that the tilting device comprises at least one hydraulic cylinder (22) installed on the support transverse (19).   4 haying machine according to claims 1   3 taken together, characterized in that the blocking and tilting device is coupled to the device for tilting up the elements   lateral (9) of the transverse frame.   Haymaking machine according to claims 1   with 4 sockets as a whole, characterized in that a blocking cylinder locking valve prevents a removal of the blockage when opening the valve   hydraulic connection to the tractor.   6 haymaking machine according to claim 5, characterized in that the blocking valve is closed during the upward tilting of the windrowers and   is open when lowered.   7 Haymaking machine according to the claims   1 to 6 taken together, characterized in that in parallel with the blocking valve is   a non-return valve is activated which, even when   that the blocking valve is closed, allows the pressure   of oil to act on the hydraulic cylinders making the cage, but prevents a reflux.