FR2543786A1 - AGRICULTURAL MILLING MACHINE - Google Patents

Abstract

THE AGRICULTURAL MILLING MACHINE ACCORDING TO THE INVENTION INCLUDES: A FRAME 1, A FIRST ROLLER 8 EXTENDING TRANSVERSALLY TO THE DIRECTION OF DISPLACEMENT AND SUSPENDED FREELY ROTATING IN THE FRAME, A SECOND ROLLER 9 IS BEHIND THE FIRST ROLLER IN RELATION TO THE DIRECTION OF DISPLACEMENT, PARALLEL TO THE FIRST ROLLER AND FREELY ROTATING SUSPENDED IN THE FRAME AND TRANSMISSION MEANS 12, 13, 14 BETWEEN THE FIRST AND THE SECOND ROLLER TO TRANSFER THE ROTATION FROM THE FIRST ROLLER TO THE SECOND ROLLER, CHARACTERIZED IN THAT THE ROLLER REAR 9 IS SHAPED BY VERTICAL PARALLEL DISCS, THE PERIPHERIES OF WHICH HAVE ANGULAR OPEN PROFILES, OF WHICH A WING EXTENDS RADIALLY.

Description

Agricultural milling machine.

  The present invention relates to a milling machine

  agricultural intended to roll on the fields and comprising essen-

  a frame, a first roller extending transversely

  in the direction of travel and suspended in the frame in a freely rotating manner, a second roller arranged behind

  the first roller, seen in the direction of travel, parallel

  the first and suspended in the frame freely

  rotative, and transmission means between the first and the second roller for transferring the rotary movement of the

first roll to second roll.

  The success of the agricultural milling machines described below

  above is due to the absence of drive, for example, by the PTO of a tractor The rotation of the rollers is

  produced by the advancement of the machine on the ground, the pre-

  mier roller turning at i transmission ratio different from I so that the second roller will take another speed

  and perform an effective treatment of the soil surface.

  The problem with such machines is that the driven rear roller must be as light as possible, while it must be as rigid as possible so that it can be rotated as easily as possible while maintaining maximum striking force on the ground. in order to

fragment the clods of earth.

  The machine according to the invention is distinguished in that the rear roller is formed by a number of discs

  vertical, parallel, the circumference of which is provided with

  angular open yarns, including one wing of the angular profile

  extends radially Thanks to this arrangement, it is possible

  ble to build the rear roller without the conventional heavy central shaft The radial wings of the profiles give

  with the roller sufficient rigidity even on large lengths

  The filling of the profiles with soil, which occurs easily on heavy soils, is practically avoided by the arrangement of the angular profiles, so

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  that the rear roller is not heavy, while the force

  of striking on the clods remains maximum.

  Said effect is further improved in accordance with the invention by the fact that a sawtooth periphery of the inner discs is provided, the recesses of which receive

each has an angular profile.

  Thanks to the construction of the rear roller

  according to the invention, the lumps are easily projected

  backwards and it is better to go up, as the second organ-

  i O ne of fragmentation, a transverse beam parallel behind the roller This beam can be tubular, this

  which facilitates the fragmentation of clods.

  The above features and others

  will be further explained in the description given below

  after with reference to the accompanying drawings in which: Figure 1 is a rear perspective view of the agricultural milling machine according to the invention; Figure 2 is a side view of the machine in the direction of the arrow II in Figure 1; Figure 3 is a perspective view of the rear roller of the machine of Figure 1; Figure 4 is a vertical section of the roller of Figure 3; Figures 5 and 6 are respectively a perspective view and a vertical section, corresponding to the figures

  3 and 4, of another embodiment of the roller.

  In the drawings, the reference 1 indicates the

  main machine frame This frame has a straight play

  gular beams, the front side and the upper side of which are provided with means for fixing to the lifting arm 2

  and to the upper arm 3 of the three-point hitch of a trac-

  not shown On both sides, the main frame 1 is

  provided with a vertical tubular profile 4, in which can

  vertically slide and be fixed with a vertical beam 5

  of a rectangular set of beams 6-of a substructure The

  placement can be performed by any suitable means

  required, for example, a threaded rod with a handle 7.

  At the front side seen from the direction of

  displacement (see arrow Pl, the sub-frame 6 carries a pre-

  mier roller 8 freely rotatable On the rear side, the subframe 6 carries a second roller 9 with free rotation Each roller is provided with pins 10 and 11 respectively, which extend beyond the sides of the subframe 6 The pins are provided with wheels 12 and 13 respectively on which a transmission chain 14 passes The diameter of the front wheel 12 is greater than that of the rear wheel 13 so that in the illustrated embodiment the rear roller 9 executes a number greater revolutions than the

front roller.

  In front of each roller is mounted a group of milling teeth 15 and 16 respectively, which are fixed to the crosspieces of the main frame 1 in an adjustable manner in height. The teeth 15 on the front side of the machine are fixed alternately before and behind the beam. This gives an alternative arrangement which allows passage

easy of the earth between the teeth.

  On the rear side of the underframe 6 a beam 17 is mounted parallel to the rear roller 9 by means of vertical arms 18 welded to the beam near means of adjustment in

height 19.

  To the arms 18 is welded a cross member 20 provided with a

  group of elastic equalizing teeth 21.

  The machine illustrated in Figures 1 and 2 works

  operates as follows During the movement of the machine in the direction of the arrow Pl on the field, the front roller 8 rotates in the direction of the arrow P 2 (see FIG. 2)

  as a result of contact between its periphery and the soil to be treated.

  Thanks to the chain transmission 12, 13 and 14, the rear roller 9 rotates at a higher speed in the direction of the arrow P 3 and sprays the ground surface 3 because of the rapid rotation of the rear roller 9 relative to the displacement speed, clods are projected towards and against the beam 17 so that these clods are broken Because of the speed of projection, clods can even be projected against the rear roller 9, so that an additional spraying occurs The equalization teeth 21 to

  rear side produce a uniform bed suitable for seed.

  The ground surface is broken in front of each roller by the group of teeth 15 and 16 respectively, the effective height of which is adjustable by means of the height adjustment mechanism 7 If necessary, the groups of teeth 15

  and 16 can be turned off by moving them

above the ground.

  From the above, it is obvious that to turn quickly, the rear roller 9 must be as light and as

  as rigid as possible Dans'ce goal the invention provides a rou-

  water as illustrated in, Figure 3, which has two discs 22 at the ends, the pins 11 being welded to the centers

outside sides.

  Between the disks 22, there are one or more dis-

  only intermediaries 23, which are only retained by the pro-

  peripheral yarns 24 These profiles are preferably angular or angle profiles, the arrangement of which is such

  that at least one wing 25 extends radially (see Figure 4).

  Thus the roller 9 in the form of a cage has the largest

  stiffness Figures 3 and 4 show that the disks inter-

  middle 23 have a sawtooth periphery, each of the recesses receiving a profile 24 Thanks to this construction the roller does not need a heavy central shaft. Such an arrangement of the angular profiles 24 further limits the adhesion of the earth in the hollows of the profiles because, with respect to the direction of rotation P 3, the profiles are in a position where they can disengage

  themselves However, the stiffness of the profiles in the direction

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  impact is ensured by the tangential wing 26 orthogonal to the radial wing Figures 5 and 6 show

  another possible shape, where the radial flange of each pro-

  spun or of several profiles is provided with teeth-shaped protrusions which contribute to the fragmentation of the clods,

  because the lumps are notched and break more easily

  along the notches With this aim the roller illus-

  tré has ten longitudinal sections.

  The invention is not limited to the embodiments

  sation described above For example the machine with two wheels

  leaux does not require groups of teeth 15, 16 d-e so that the main frame can be omitted and the hitch three

  points can be mounted directly on the subframe 6.

Claims (9)

  1 Agricultural milling machine intended to be dragged on the fields, mainly comprising a frame (1), a   first roller (8) extending transversely to the direction   displacement and freely rotatably suspended in the frame, a second roller (9) arranged behind the first roller with respect to the direction of movement, parallel to the first roller and suspended so   freely rotatable in the frame and transmission means   sion (12, 13, 14) between the first and the second roller to transfer the rotation from the first roller to the second roller, characterized in that the rear roller (9) is formed by parallel vertical discs (23), the peripheries of which have open angle sections (24), one of which wing (25) extends radially.   2 machine according to claim 1, characterized in that the inner discs (23) have a sawtooth periphery, each hollow of which receives an angular profile (24).   3 Milling machine according to claim 1 or 2, charac-   terized in that the radial wing (25) is provided with protuberances   shaped like teeth extending outwards.   4 Milling machine according to any of the claims   cations 1 to 3, characterized in that with respect to the direction   displacement, it is provided behind the rear roller   (9) a continuous beam (17) parallel to the roller.   Milling machine according to claim 4, character-   risée in that the beam is tubular.   6 Milling machine according to Es claims 4 and 5, charac-   characterized in that, with respect to the rear roller (9), the beam is adjustable in height.   7 Milling machine according to claims 1 to 6, charac-   characterized in that elastic leveling teeth (21) are provided behind the rear roller (9) or the continuous beam   respectively with respect to the direction of movement. 7 2543786   8 Milling machine according to any of the claims   previous cations, characterized in that the front and rear rollers (8,9) are mounted in a sub-frame (6) which is adjustable in height with respect to a main frame (1) comprising one or more groups of teeth milling machines (15, 16).   9 Milling machine according to claim 8, character-   in that the main frame (1) has one or more   several series of milling teeth (15, 16) transversely to the direction of movement, the teeth of which are at least the   front series are arranged in alternate positions.