FR2789842A1 - Plough involves modification of tools orientation when moving rods so that whole plough is laterally displaced - Google Patents

Abstract

When actuator (40) is operated, actuator (41) swings clockwise and pushes connecting rods (42, 44) anti-clockwise. Rod (42) moves parallel rod (34) to the back, rotating supports (33) of tools (30) anti-clockwise so that tools move more soil. Rod (44) applies traction on rod (46) that slightly rotates frame (20) relative to part (10) (by rotating around axis (19)).

Description

Variable width plow

  The present invention relates to a variable width plow.

  In patent DMI Inc. n 74-34498 of October 14, 1974, a plow of variable width has been described constituted by an oblique beam on which the plowing bodies are pivotally mounted, this beam being itself pivotally mounted on a axis disposed at its front end and the plowing bodies being connected to each other by a connecting rod of parallelism so that when the beam carrying the bodies is pivoted, the latter move away from each other while residing

  parallel to each other and parallel to the direction of travel of the tractor.

  The disadvantage of this device is that it makes it possible to vary the width of the 26, 3rd, etc. lines, but that it does not allow the width of the first line to be varied. It is therefore necessary, to obtain a good result, to combine two movements: a pivoting movement of the oblique support carrying the plow bodies, which varies their spacing and a movement of lateral displacement of the whole plow,

  to vary the width of the first line.

  Initially, it was proposed in the international patent Harvester No. 78.25518 to have two jacks, a first jack to rotate the beam carrying the bodies and a second jack to slide the plow laterally by

compared to its coupling head.

  We then sought to obtain these two movements simultaneously by means of a single cylinder. For this, the plow itself was connected to its coupling head by two rods of unequal length or two converging rods. A device of this kind has been described in the HUARD patents n 88.11582 or

KVERNELAND n 90.12172.

  However, it turns out that these mechanisms are complex and fragile, which is a serious drawback for a plow whose primary qualities must be the

robustness and simplicity.

  The present invention relates to a variable width plow

  particularly simple and robust.

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  The variable width plow according to the present invention is characterized by the fact that it is constituted by: a) a frame comprising an oblique support, carrying the plowing bodies, on which said bodies are pivotally mounted, while being connected to each other by a connecting rod keeping them parallel to each other; b) a scuff, connected to the plow head, by means of a horizontal shaft substantially parallel to the direction of advance of the tractor, which allows it to pivot when it is reversible; c) a connection between the chassis and the splash formed on the one hand by a horizontal beam, integral with the regrowth and directed towards the rear, provided at its rear end with a vertical axis on which the chassis is mounted pivoting and on the other hand by two spacers between which the front end of the foam can slide; d) a plow head pivotally carrying the spindle turning shaft, this head being carried by coupling the tractor which is floating; e) a single control jack, carried by the chassis, simultaneously actuating a first connecting rod acting on the parallelism connecting rod so as to rotate all the plow bodies to modify the orientation and a second connecting rod modifying the respective positions of the chassis and recoating, so that by using the single cylinder, the orientation of the plow bodies is modified by the first connecting rod, which causes lateral displacement with slight pivoting, of the whole charm by pivoting the floating hitch, this lateral movement being accompanied by a pivoting in turn causing a tip cant which is automatically corrected by the action of the second connecting rod which makes it pivot

  the chassis slightly in relation to the scuff.

  The invention furthermore comprises the following provisions: a) the horizontal beam carried by the splash and at the rear end of which the chassis is pivotally connected to said splash must be long enough for this pivot point to be located sufficiently behind the head so that the lateral displacement of the plow is sufficient for the variation in width of the first line;

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  b) the attachment of the third point to the plow head must include a clearance such that the connecting rod of the third coupling point does not interfere with the lateral movements of the plow; c) the pivoting attachment between the foam and the chassis and the attachment of the second connecting rod to the foam can be done at several points so as to

  adapt the plow to the track of the tractor.

  By way of nonlimiting example, there is shown in the accompanying drawings: Figure 1 a top view of an exemplary embodiment of the plow according to the invention.

  Figure 2 a plan view of the frame of the plow of Figure 1.

  Figure 3: a plan view of the plow of Figure 1.

  Figure 4 a sectional view along A-A of Figures 2 and 3, the two parts

being assembled.

  Figure 5 a view of the plow of Figure 1 illustrating in solid lines

  the maximum spacing of the plowing bodies and the minimum spacing in dotted lines.

  Referring to these figures, it can be seen that the tractor T has two lower coupling arms 1 which, in known manner, are converging towards the front with respect to

  to the direction of advancement D and fitted with ball joints.

  To these two coupling arms 1 is coupled the plow head 2 which includes the bearing 3 which allows the scum to pivot around the axis XX for the

  turning the plow, when it is reversible.

  The plow head 1 also carries the third coupling point 4.

  The splash 10 (Figure 3) has a shaft 11 which extends forward and engages in the bearing 3 of the plow head I; a beam 12 extending backwards, terminated by a fork 13; two identical parallel plates 14 and 15 which enclose and assemble the shaft 11 and the beam 12; a plate 16, provided with three holes 17, which is fixed to the upper plate 14. The beam 12 and the shaft 11 are horizontal. The two branches of the fork 13 are provided with a hole 18 intended

to receive an axis 19.

  The chassis 20 is a triangular chassis. It is constituted by a beam 21, which constitutes the largest side of the triangle, two spacers 22 and 23 in U, which constitute the base of the triangle and a stay 24 which constitutes the third side of the triangle. A spacer 25 joins the beam 21 and the forestay 24 to about half their lengths. The beam 21 fulfills the same role as the oblique beam of the known devices it is oblique and is provided with bearings 26, spaced at regular distance, at

  by means of which the plowing bodies are pivoted by said beam 21.

  The spacer 25 carries three holes 27 which correspond to the holes 17 of the plate 16. The holes 17 and 27 are arranged perpendicular to axis XX, their spacings are the same and the line joining the middle holes is

parallel to said axis XX.

  As can be seen in FIG. 4, the foam 10 is arranged in a space formed between the two spacers 22 and 23; the spacer 22 being in U directed upwards and the spacer 23 being in U directed downwards. Sliding plates 22a23a (for example in Tefion [mawoe o t à la ocW dr dit menii D t de N])

  ensure good sliding of the scuff 10 between the spacers 22 and 23.

  The axis 19, carried by the fork 18 of the foam 10, crosses one of the three

rentretoise 25 bends 27.

  The shaft 1 1 can pivot in the bearing 3 but can not slide longitudinally: it follows that the frame 20 is connected to the scuff 10 by

  the axis 19 which is fixed longitudinally to the plow head 2.

  The splinter 10 further carries a fork 13a intended to receive the rod of the turning cylinder which controls the pivoting of the entire plow in the

  bearing 3 by the recoiling shaft 11.

  Each plow body 30 is carried by an arm 31, parallel to the axis XX.

  Each arm 31 is pivotally mounted along a horizontal axis in a stirrup 32 itself

  mnme secured to a pivoting support 33. Each support 33 is pivotally carried along a vertical axis by the beam 21 by means of a bearing 26. The pivoting supports

  33 are connected to each other by a parallelism rod 34.

  The parallelism rod 34 is coupled to a control cylinder 40 by

  by means of a rocking lever 41 actuating a connecting rod 42.

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  The rocking lever 41 pivots on an axis 43 carried by the chassis 20; the jack

  is also carried by the chassis 20.

  The rocking lever 41 also acts on a connecting rod 44.

  As the connecting rods 42 and 44 are located on either side of the axis 43, they are moved in opposite directions by the lever 41 when it is actuated by the jack 40. The connecting rod 44 is coupled, by a reference d 'angle 45, to a connecting rod 46 which is coupled

  to plate 16, described above, by an axis placed in one of the three holes 17.

  The operation of the plow is described below.

  First, position the plow laterally

  of the track of the tractor T to which it must be coupled.

  This is done by means of holes 17 and 27 which are parallel and equidistant.

  In the example shown in FIGS. 1 and 5, the chassis 20 is coupled to the splash by an axis 19 located in the central bore 27 and the connecting rod 46 is coupled to the part.

  16 of the regrowth 10 by an axis 47 located in the middle hole 17.

  You can move the plow laterally, parallel to itself by

  using either the top holes 17/27 in the figure, or the bottom holes.

  It should be noted that the invention is not limited to the case where there are three holes 17

  and three holes 27: there may be more or less.

  Once the plow is positioned correctly in relation to the tractor's track

  T, the width of the plowing lines can be varied by means of the single jack 40.

  Figure 1 shows the parts in the middle position, the spacers 22/23 of the chassis 20 being parallel to the cross member 2 of the plow head; FIG. 5 shows in solid lines the parts in the maximum spacing position of the plowing bodies 30, the spacers 22123 of the chassis 20 having slightly pivoted with respect to the scuff 10 so that they are in a slightly oblique position towards the before; FIG. 5 shows in dotted lines the parts in position of minimum spacing of the plowing bodies 30, the spacers 22/23 of the chassis 20 having slightly pivoted in

  opposite direction, so that they are in a slightly oblique position towards the rear.

  Referring to Figures 1 and 5, we see that when the cylinder 40 is actuated so that its rod is retracted, the cylinder 41 switches in the direction of the needles of a

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  shows and pushes, in the opposite direction, both on the connecting rod 44 and on the

connecting rod 42.

  The connecting rod 42 moves the parallelism connecting rod 34 backwards, which causes the supports 33 of the plow bodies 30 to pivot all together in the opposite direction to that of the needles of a watch. This causes a change in the orientation of the plow bodies 30, which

  tend to 'take up' more soil, which causes a reaction on the bodies 30.

  As the lower arms 1 of the three-point linkage of the tractor are floating and fitted with ball joints, this reaction has the effect that the entire plow pivots in the direction indicated by the arrow F1 until the counterseps of the plow body 30 are again aligned with the direction of advance D of the tractor T. But simultaneously the connecting rod 44, which is pushed by the lever 41, exerts, by means of the angular gear 45, a traction on the connecting rod 46 which slightly swivels the frame 20 relative to the splash 10 (by pivoting around the axis 19 and sliding on the sliding plates 22a and 23a) which corrects the defect of

  tip cant which is caused by the rotation of the plow.

  There is thus obtained simultaneously, by means of the single jack 40, both an increase in the spacing between the plowing bodies 30, therefore an increase in the width of the plowed lines, and a lateral displacement of all the plowing bodies by

  compared to the tractor wheel, therefore an increase in the width of the first line.

  As the plowing bodies are put on their own in a position of equilibrium because the lower arms of the coupling 1 are floating, the force on the bodies is perfectly balanced. However, you must be able to have settings to be sure

  to have a good positioning of the bodies.

  For this, the connecting rods 42 and 46 are provided with means making it possible to modify

their length.

  UI should be noted that in order to obtain a good rotational movement between the chassis and the scuff 10, it is preferable, as shown, that the axis 19 carried by the fork 13 of the beam 12 is sufficiently behind the head 2 to obtain sufficient displacement in order to obtain a correct variation of the width of

the first line.

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  It is also necessary that the attachment of the plow head 2 to the third coupling point has sufficient play so as not to impede the floating lateral movement of the two lower coupling connecting rods 1, which, moreover, must converge towards the forward so that the lateral displacement of the plow is accompanied by a slight pivoting.

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Claims (2)

  1) Variable-width plow in which the spacing between the plowing bodies as well as the lateral position of the first body are controlled by a single cylinder, characterized in that it is constituted by: a) a frame (20) comprising an oblique support (21) carrying the plowing bodies (30), pivotally mounted, while being connected to each other by a parallelism rod (34) keeping them parallel to each other, b) a scuff (10) connected to the plow head (2) by means of a horizontal shaft (11) substantially parallel to the direction of advance (D) of the tractor (T), in order to be able to pivot when it is reversible, c) a connection between the chassis (20) and the splash (10) formed on the one hand by a horizontal beam (12), integral with the splash (10) and directed towards the rear, provided at its rear end with a vertical axis ( 19) by which the frame (20) is pivotally connected to said sputter (10); on the other hand by two spacers (22, 23), integral with the chassis forming a slide in which the chassis (20) can slide, to orient itself relative to the scuff, d) a plow head (2) bearing pivotally by means of a bearing (3) the reversal shaft (11) of recoating (10), this head (2) being coupled to the three-point hitch of the tractor (T), the two arms (1) said three-point hitch being floating and fitted with ball joints; so that by implementing the single jack (40), carried by the chassis (20), the orientation of the plowing bodies (34) is modified by a first connecting rod (42) acting on the parallelism connecting rod (34). 30), which causes a lateral displacement, with slight pivoting, of the entire plow (scallop 10 and chassis 20) by pivoting of the floating hitch (1), this displacement being accompanied by a pivoting causing in turn a cant point which is automatically corrected by a second connecting rod (44) which slightly swivels the frame (20) relative to the splash (10) around the axis (19) so as to give a variable tip face which allows the variation of the width of the first line by self-alignment of the bodies to give it an identical width to the following lines. 9 2789842   2) plow according to claim 1, in which the horizontal beam (12) carried by the splash (10) and at the end of which the frame (20) is pivotally connected to said splash (10) has such a dimension that the pivot axis (19) is located sufficiently behind the plow head (2) so that the lateral displacement of the plow is sufficient for the variation of the width of the first line.   3) Plow according to claim 1 or 2 wherein the attachment of the plow head (2) to the three-point hitch of the tractor (T) must include sufficient play so as not to interfere with the lateral movement of the lower arms d 'hitch (1); the latter being convergent so that the lateral movement of the plow is accompanied by pivoting.   4) Plow according to the preceding claims, wherein the cylinder   single control (40) is carried by the chassis (20) and acts on a rocking lever (41) pivoting about an axis (43), carried by the chassis (20) this rocking lever acting, in opposite direction, on a first connecting rod (42) coupled to the parallelism connecting rod (34) and on a second connecting rod (44) coupled via a bevel gear (45) to a connecting rod (46) connected to the splash ( 10) by a plate (16)   so as to pivot the foam and the frame (20) relative to each other.    ) Chassis according to the preceding claims, in which the axis (19)   articulation of the chassis (20) relative to the foam (10) can be placed,   choice, among several holes (27).   6) Chassis according to claim 5 wherein the attachment of the connecting rod (46) on the plate (16) integral with the foam (10) can be placed as desired from several holes (17).   7) Plow according to claims 5 and 6 wherein the holes (17) and   the holes (27) are arranged in two parallel rows and are equidistant.   8) Plow according to the preceding claims wherein the two   control rods (42-44) are provided with means allowing the length to be adjusted.