FR2564697A1 - DEVICE FOR MOUNTING AN AGRICULTURAL PULVERIZER SPRAY BAR WITH DAMPING OSCILLATIONS DURING THE MARKET FOR UNIFORM GROUND SPRAY - Google Patents

Abstract

A. MOUNTING DEVICE OF THE SPRAY BAR OF AN AGRICULTURAL SPRAYER, WITH OSCILLATION DAMPING DURING THE MARKET, TO OBTAIN A UNIFORM SPRAYING ON THE GROUND. B. CHARACTERIZED IN THAT THE VERTICAL ROTATION AXIS 15 FOR THE ROTATIONAL MOVEMENT IN THE HORIZONTAL PLANE IS AT LEAST APPROXIMATELY IN THE PLANE OF THE CENTER OF GRAVITY OF THE SPRAY BAR 5 AND THAT THE SUSPENSION OF THE BAR 5 INCLUDES, ON THE BASE CHASSIS 1, TWO BEARINGS 12, 13 PLACES AT A CERTAIN DISTANCE FROM ONE OF THE OTHER IN THE DIRECTION OF TRAVEL 7. C. THE INVENTION RELATES TO A DEVICE FOR MOUNTING THE SPRAY BAR OF ONE. AGRICULTURAL SPRAYER, WITH OSCILLATION CUSHIONING DURING THE WALK, TO OBTAIN A UNIFORM SPRAYING ON THE SOIL.

Description

Device for mounting the spray bar of a sprayer

agricultural sector, with amortization of

  oscillations during walking, to obtain a pul-

uniform verification on the ground ".

The invention relates to a device

  for the spray bar of a spray-

  agricultural hopper which comprises a base frame connected with the pulveriser, to which the spray bar is connected by articulated elements so that it can rotate on axes, in a limited angle, both in the horizontal plane, in and opposite to the direction of travel, only in the vertical plane, the axis

  of rotation which extends in the direction of

  rotational movement in the vertical plane above the center of gravity of the spray bar. A device for mounting this

  kind is already known from DE-OS 23 58 204.

  In this device, it is mounted on the base frame

  the agricultural sprayer, an intermediate frame

  tical, with two superimposed bearings, arranged so as to be able to rotate in the horizontal plane on an axis which extends vertically. On this intermediate frame is mounted the spray bar which can rotate,

  by means of two articulated elements, in the vertical plane

  tical, on an axis which extends in the direction of the march, this axis of rotation, on which can rotate the bar of spray, being above the center of gravity. The axis of rotation passing through the intermediate frame bearings, vertically, is at a great distance ahead of the center of gravity of the spray bar. The advantage, in

  this bar is suspended so that it can

  see turning within certain limits in both horizontal and vertical planes, so that shocks from the machine are not, or at least not in all their importance, transmitted to this spray bar. The disadvantage of this device

  montage lies in the importance of its construction.

  In this device, it is mounted between the base frame of the machine and the spray bar, in addition, an expensive intermediate frame, rotatably mounted on an intermediate axis extending vertically. he

  it is necessary to provide for the fixation

  vibration of this intermediate frame, expensive building elements. Then, again devices must be provided to mount the spray bar on the intermediate frame so that the intermediate frame and the bar are rigidly connected together in the horizontal plane; that is, therefore, that the bar must be mounted on

  the intermediate frame in a vertical sliding guide

  tical. If forces acting in the vertical direction and in the horizontal direction act in superposition

  on the bar, it may happen that this bar is

  in the sliding guide on the inner frame

  médiaire. The possibility for the bar to run a

  pendulum movement in the vertical plane will be sup-

awarded in an unfavorable way.

  Finally, one must consider as a disadvantage of this mounting device, the fact that

  the vertical axis of rotation is at a great distance

  the center of gravity of the spray bar

  tion. The disadvantage appears especially when it happens

  side impacts from the machine, because of the importance of the lever arm which is determined by the distance between the center of gravity

  of the spray bar and the rotational axis of

  tical, the bar is very strongly encouraged to vibrate.

  On the other hand, DE-OS 32 12 578 discloses yet another device

  of the spray bar of a pulveri-

  farmer. In this spray bar, we first encounter this disadvantage that the bar is suspended at the center of gravity itself. As a result, this spray bar always adjusts, because of this special suspension, parallel to the agricultural sprayer. This adjustment is unfavorable if a wheel of the sprayer or the tractor that carries it passes in a rut, so that one side of the spray bar will be substantially

  closer to the ground surface than the other side.

Finally, it is also unfavorable

  with this spray bar, because of the sus-

  pension similar to a gimbal suspension, which he

  there is only one elastic element for damping

  or compensation of the oscillation in the planes

  horizontal and vertical. In these circumstances, the amortization

  vibration in the event of super-oscillations

  in the vertical and horizontal directions is complete-

uncontrolled.

  The object of the invention is, while eliminating the defects that have just been described, to substantially simplify the construction work of the suspension of the spray bar, and at the same time to improve the behavior in case of oscillations.

of this spray bar.

  For this purpose, the invention proposes that

  the vertical axis of rotation for the rotational movement

  the horizontal plane lies at least approximately in the plane of the center of gravity of the spray bar and that the suspension of the bar comprises, on the base frame two bearings placed at a certain distance one of the other in the direction of walking. Thanks to these provisions, we obtain

  extremely stable behavior of the pulley bar

  during the work, so that the spray agent to be dispensed will be evenly distributed over the soil surface. On the other hand, the bar is suspended in a very flexible way so that

  this bar is not caused to oscillate by the spray-

  riseur. Oscillations can not

  increase because the resonance zone that could become

  The danger of increasing the oscillations of the spray bar is shifted to a zone of running speed which makes no sense for

an agricultural sprayer.

  Advantageously, the bearings arranged at a distance in the direction of travel exert an action in the following suspension

  the invention, the vertical axis of the spray bar

  which allows its rotation being at least appro-

  approximately in the plane of the center of gravity, because the bearings themselves already act as vibration dampers. We found that there is an advantage here

  the bearings are placed at different distances

  the center of gravity of the spray bar. As these bearings already exert, by a suitable embodiment, by themselves, a damping effect due to the friction forces of the bearings, the oscillations behavior of the bar can be

  influenced in a positive way by the choice of

  tance. So that no undesirable force acting laterally on the spray bar can excite its oscillation, it is provided according to the invention that the bearing which is farthest from the center of gravity of the bar is arranged so as to be rotatable in the horizontal plane on the landing which is closest to this center of gravity of the bar. We thus maintain the lever arm,

  between the rotating bearing and the center of

  the bar as small as possible.

In a preferred embodiment

  mandé, it is expected that is disposed on the spray bar, an axis of rotation which extends in the direction of travel, that on both ends of this axis are posed the soles of the bearings, and that these soles rely on the bearing pedestals on the base frame. In this way, we obtain a great simplicity of suspension for the spray bar, with good oscillation behavior. It has been found that there is advantage here that the bearings are made in the form of sliding bearings. It is possible by this means

  to act very simply on the behavior at the oscil-

  by appropriate lubrication of the bearings.

In a preferred embodiment

  the invention provides that the sole of the bearing, which is the closest to the center of gravity of the

  spray bar, is blocked by lateral

  adjacent to the soleplate on the bearing base, and that the other soleplate resting on its bearing housing is arranged so as to be rotatable on a limited angle, in the horizontal plane, with respect to

  the sole that is closest to the center of gravity.

  By this means, it becomes possible to provide two bearings of the same type for the suspension of the bar. So that the spray bar is always gently brought back, after oscillation deflection, in its initial position, it is provided according to the invention that on the base of the bearing which is furthest from the center of gravity of the bar, one disposes, laterally, next to the sole of the bearing, buffer elements, or shock absorbers.

In a preferred embodiment

  According to the invention, it is provided that the buffer elements or shock absorbers are made in the form of rubber buffers. It has proved advantageous here that the rubber stamps are always

  poses at a small distance from the footing of the landing.

  In this way, the friction forces of the bearing

  can act first, without being disturbed, as

  s oscillations that would occur in the sense

  horizontal. Only if the shocks are more important

  that the oscillations are further damped

by the buffers.

To be able to act on the behavior

  to the oscillation of the spray bar on

  the axis of rotation extending in the direction of the

  According to the invention, provision is made for elastic elements to be provided between the base frame and the spray bar. These elastic elements may be made, for example, in the form of tension springs of elastic members with gas pressure, or shock absorbers. In order to be able to properly adjust the spray bar in the suspension position, or during the trips made by the agricultural sprayer in ruts, the elastic elements

  will be arranged, on the bar and / or on the chassis of -

  base, at different distances from the axis of rotation extending in the direction of travel. In order for it to be transmitted by the elastic elements only in a plane to the spray bar, it is provided according to the invention that the elastic elements are arranged at least approximately

  vertically and perpendicularly

  in the sense of walking, and which passes through the axis

  rotation of the spray bar.

  Other peculiarities of the invention

  from the following description of an example

  Embodiment and accompanying drawings o:

  FIG. 1 represents the device

  according to the invention seen from the rear,

  - Figure 2 shows the same arrangement

side view and,

  - Figure 3 shows the same arrangement

in plan.

  The mounting device shows the base frame 1, which is firmly connected with the

  chassis of the agricultural sprayer which is not representative

  tee, or which itself constitutes a constituent part of the chassis of the agricultural sprayer. On the base frame is welded the support 2 of the bearings, on which are screwed the front bearing base 3 and the rear bearing base 4. On these two bearing bases 3 and 4 is mounted the spray bar 5, by means of of the axis of rotation 6, which is placed above the center

  of gravity S of this bar 5, on this bar itself.

  The axis of rotation 6 extends in the direction of travel 7 of the agricultural sprayer. On each of the ends 8 and 9 of the axis of rotation 6 is disposed a bearing flange 10, or 11. The bearing flanges 10 and 11 are slidably mounted on the bearing bases 3 and 4 and bear on them. The base 3 and the sole

  mounted on the end 8 of the axis of rotation,

  the front bearing 12, and the base 4 and the sole

  11, placed on the end 9 of the axis 6,

  rear bearing 13. Both bearings 12 and 13

  are disposed, if we look in the direction of the

  , at different distances from the center of gravity S of the spray bar 5. The bearing 12 is at a distance A, and the bearing 13 at a distance B of this center of gravity S. The rear base 11 of bearing, which is closer to the center of gravity S of the bar 5 than the sole 10, is locked in the direction of the sides by stops, made in the form of studs on the rear base 4, so that the front bearing sole 10 can rotate, to a certain extent, in the horizontal plane relative to the bearing flange 11 by sliding on its base 3. As a result, the vertical axis of rotation 15, which passes through the soleplate 11 is approximately in the plan

  center of gravity of the spray bar.

  On the front bearing base 3 are arranged, each laterally next to the front flange 10, the buffer elements or shock absorbers made in the form of rubber pads. The rubber buffers 16 have, in the basic position of the bar 5, each time, the small distance C by

to the sole 10.

  On the rear face of the bar 5 are placed between the base frame 1 and the bar 5, the elastic elements made in the form of traction springs 17. The springs 17 must be mounted on the bar-5, each time in the holes arranged on top of each other on the bar 5 and indicated by hatched lines 18. In this way, the springs

  17 will be arranged at different distances

  port to the axis of rotation 19 of the bar 5 which extends in the direction of travel 7, through the axis of rotation 6. On the other side of the springs 17 are placed

  the perforated tie rods 20. These tie rods 20

  if perforations 21, by means of which the tie rods can be hooked on the stud 22 of the adjustment lever 23, rotatably fixed on the bearing support

  2. The adjusting lever 23 can be adjusted in

  on a stud 24 mounted on the bearing support, and be brought into different positions by means of the screw 25, and the slot 26 placed in the support 2 of the bearings. By means of the perforated tie rods 20 and the

  adjusting lever 23, the springs 17 can be

  at different distances, relative to the axis of rotation 19 of the bar 5, which extends in the direction of travel, on the base frame 1; the tension of

  springs 17 can also be adjusted. The resources

  spells 17 are placed in such a way, between the spray bar 5, and the base frame 1 or the adjustment lever 23, that the plane passing through the springs

  17 passes approximately through the vertical axis of rotation

cal 15.

  The operation of the mounting device according to the invention can be described from

following way.

The spray bar is

  attached to the base frame 1 of the agricultural sprayer

  in such a way that it can not oscillate in any way, or only to a very small extent, in the horizontal and vertical

  that he is in service. The oscillations that occur

  By acting in the vertical plane on this bar 5, they will be damped by the suspension of the bar above the center of gravity S of this bar 5, by the traction springs 17, arranged between the base frame 1 and the bar 5, and by the frictional forces between the axis of rotation 6 and the bearing flanges 10 and 11. The oscillations acting in the plane

  horizontally on bar 5 will be amortized by the

  these friction between the sole 10 and the bearing base 3, and moreover, by the rubber pads 16, if the oscillations are greater than the clearance provided between the sole 10 and the rubber pad 16.

  Thanks to the suspension, according to

  vention, it is obtained that the spray bar

  maintains an extremely stable position during the

distribution ration.

RE VE N D I CA TIO N S

  1) Mounting device for the spray bar of an agricultural sprayer which has a base frame connected with the sprayer, to which the spray bar is connected by articulated elements so that it can rotate on axes, in a limited angle, both in the horizontal plane, in and opposite to the direction of travel, and in the vertical plane, the axis of rotation

  which extends in the direction of travel, intended for the

  rotation in the vertical plane lying

  above the center of gravity of the spray bar

  characterized in that the rotational axis

  vertical direction (15) for the rotational movement in

  the horizontal plane is at least approximately.

  in the center of gravity plane of the spray bar (5) and that the suspension of the bar (5) comprises, on the base frame (1), two bearings (12, 13) placed at a certain distance one from each other in

the direction of travel (7).

  2) Device according to the claim

  1, characterized in that the bearings (12, 13) are placed at different distances (B, C) relative

  at the center of gravity (S) of the spray bar (5)

tion.

  3) Device according to the claim

  2, characterized in that the bearing (12) farthest from the center of gravity (S) of the bar (5) is arranged, rotatable in the horizontal plane, on the bearing (13) which is closest to the center of gravity

(S) of the bar (5).

  4) Device according to the claim

  3, characterized in that on the spray bar

  sation (5), an axis of rotation (6) extending in the direction of travel (7) is arranged, that on both ends (8, 9) of the axis of rotation (6), mounts each sole (10, 1) of a bearing (12, 13), and that the soles (10, 11) rest on the bases (3, 4) of the bearings placed on the base frame

(1).

   Device according to claim 4, characterized in that the bearings (12, 13) are

  made in the form of sliding bearings.

  6) Device according to the claim

  4, characterized in that the sole (11) of the bearing (13) which is closest to the center of gravity (S) of the bar (5) is blocked by stops (14), placed laterally next to the sole (11) on the bearing base (4), and that the other sole (10) is arranged on its bearing base (3) so as to be rotatable in the horizontal plane, at a limited angle with respect to the sole (11) bearing that is the most

  near the center of gravity (S) of the bar (5).

  7) Device according to the claim

  6, characterized in that the stops are made

in the form of studs (14).

  8) Device according to the claim

  6, characterized in that the stops are made

  in the form of shims fixed on the bearing base.

  9) Device according to the claim

  4, characterized in that, on the base of the bearing (12) furthest from the center of gravity (S) of the bar (5), on the side, next to the sole ( 10) of the bearing (12), elements

  buffers or shock absorbers (16).

 ) Device according to the claim

  9, characterized in that the buffer elements or shock absorbers are made in the form of

rubber buffers (16).

  11) Device according to the claim

J3

  10, characterized in that the rubber pads

  rubber (16) are laid, always at a small distance

(C) the bearing flange (10).

  12) Device according to the claim

  1, characterized in that between the base frame (1) and the spray bar (5) there is

springs (17).

  13) Device according to the claim

  12, characterized in that the springs (17) are

  placed on the spray bar (5) at

  different from the axis of rotation (19), which extends in the direction of travel, of this bar (5).

) Device according to the claim

  12, characterized in that the springs (17)

  may be arranged at different distances from the axis of rotation (16) of the bar (5) extending in the direction of travel (7) on the chassis

basic (1).

  15) Device according to the claim

  12, characterized in that the tension of the springs

(17) is adjustable.

  16) Device according to the claim

  12, characterized in that the springs are

  in the form of tension springs (17).

) Device according to the claim

  12, characterized in that the springs (17) are

  at least approximately in the vertical plane

  cal that extends perpendicular to the direction of

  step (7), which passes through the vertical axis of rotation

tical (15).