FR2573609A1 - FILLER WITH FILLING LEVEL DETECTION, IN PARTICULAR BY A MICROCOMMUTER SITUATED IN THE HOPPER. - Google Patents

Abstract

A) DRILL WITH FILL LEVEL DETECTION, ESPECIALLY BY A MICROSWITCH LOCATED IN THE FEED HOPPER. B) DRILL CHARACTERIZED IN THAT THE FILL LEVEL SIGNALING DEVICE24 IS MADE IN THE FORM OF A MICROSWITCH16, IN THAT ON THE SWITCHING LEVER20, 27 OF THE MICROSWITCH16, A PLATE17 IS PROVIDED AND IN THAT THE PLATE17 HAS A PERIPHERAL EDGE18 DIRECTED DOWN. C) THE INVENTION CONCERNS A DRILL WITH FILLING LEVEL DETECTION, IN PARTICULAR BY A MICRO-SWITCH LOCATED IN THE SUPPLY HOPPER.

Description

1. "Sowing machine with filling level detection, in particular by

  a microswitch located in the feed hopper. "

The invention relates to a planter

  carrying a frame and a feed hopper that feeds

  seed shares in sowing

  of a dosing device, at least one

  Filling level signaling device being provided

in the feed hopper.

  Such seeders are already known according to DE-OS 24 38 575. In the case of such a drill, it measures inter alia the filling level of the feed hopper to display. To measure the filling level of the feed hopper, this hopper feeds the drill has a capacitor serving as a measuring sensor and whose capacity changes with the

  change of filling level. This capacitor

  door capacitor plates directed in the direction

  discharge from the feed hopper and

  both a variable capacity according to the variation of

  consisting of air and seed grains. For

  display the capacity of the capacitor, we use an oscillator

  which, for the capacity of the capacitor,

  the dielectric of the air, has a frequency whose oscillation

  lation stalls when the dielectric changes. The oscillation

  This is followed by a rectifier and filter stage which separates the oscillator states from the oscillator; this stage converts the different states of oscillation of

  the oscillator into a control signal. The signal of com-

  Mande is amplified by an output amplifier for

  that a receiver corresponding for example a lamp-

  The witness can be actuated directly by the control signal. The use of such a device

  filling level signaling placed in the trea-

  The feed of a seed drill is related to important measuring technique means for processing the signals supplied by the capacitor. Because of the means of

  important measuring technique, the cost of such a

  The level of filling level signaling is so high that it has not been able to

hopper feed hoppers.

  The object of the invention is therefore to create a filling level signaling device,

  as simple and as cheap as possible.

  For this purpose, the invention relates to a device of the above type, characterized in that the filling level signaling device is in the form of a microswitch, in that on the switching lever of the microswitch, it is provided a plate and that the plate has an edge

device pointing down.

  With this feature, it is possible in the simplest and cheapest way possible to control the level of seed filling of the hopper of a seed drill and signal in time by a display device, the the fact that the filling level in seed has decreased so much that it will soon be necessary to refill the feed hopper with seed. Microswitches

  are sold at very low prices.

  In one embodiment, it is provided according to the invention that the edge of the plate, directed

  downwards delimits a cavity and covers the microcom-

  mutator. Thanks to this characteristic, the microcommuta-

  advantageously protected against direct contact with the seeds and this ensures the reliability of the filling level signaling device

in the form of a microswitch.

  - The invention provides for choosing the

  weight of the plate so that the switch raises the

  only when no product is on the plate.

  This makes it possible in the simplest and least costly way to manufacture fill level signaling devices operating on the simple principle of an opening and closing switch and requiring no expensive signal conversion and so on. constitutes a particularly simple solution and

inexpensive.

  Moreover, it is provided according to the invention

  connect the microswitch to a display device

  chage. This display device informs the driver of the tractor that pulls the drill, sufficiently in time that the

  seed filling level of the feed hopper

  has decreased to a point requiring a new supply of

  tation, in order to prevent the feed hopper

be suddenly empty.

  According to another embodiment

  particularly advantageous, it is provided according to the invention

  having several microswitches in the feed hopper at different filling heights in this hopper. By this means, it is possible to precisely control the different filling levels of the feed hopper and the tractor operator is informed at all times of the seed content of the feed hopper. hopper

feeding of his drill.

  A particular embodiment

  advantage of the invention is characterized in that

  the feeding hopper comprises in its long direction

  tudinal, several switches. This allows to control

  the regular distribution of seeds throughout the

  feed hopper and to detect possible incidents at the level of the

remediate.

  The present invention will be described in more detail with the aid of the accompanying drawings, in which: - Figure 1 shows a drill according to

the invention in a rear view.

  - Figure 2 shows a signaling device of a filling level of the feed hopper. FIG. 3 shows the filling level signaling device represented in FIG.

  Figure 2, in sectional view on an enlarged scale.

  FIG. 4 shows another embodiment of the filling level signaling device in sectional view, in the loaded state, and FIG. 5 shows the filling level signaling device of FIG. 4.

in the unloaded state.

The drill 1 comprises a frame 2

  which, in operation, rests on the ground 4 via

  rolling wheels 3; it comprises a feed hopper 5. In the lower zone of the feed hopper 5, there are dosing elements 6 and from these, the seed contained in the feed hopper 5 passes through hoses. -directors 7, in an adjustable quantity, in the ground 4 via the

  sow coulters 8 as is known. -

  Inside the hopper 5, there are fill level signaling devices 9 mounted on the front wall 10 of the hopper so as to be directly above the axis of the hopper 5.

  the agitator 11 of the feed hopper 5, respectively

  right and left as well as in the middle of the feed hopper 5. Such mounting of the fill level signaling devices 9 in the hopper

  5 indicates in time that the level of replacement

  pleating decreased and just arrived

  above the agitator shaft 11 and that it is thus necessary

  to complete the filling. In the middle of the feed hopper 5, there is shown by mixed lines,

  another level signaling device fulfills

  9 ', above the signaling device of

filling level, central 9.

  This is to indicate that the filling level signaling devices 9 are distributed at different filling heights inside the feed hopper 5. Thanks to this characteristic, the driver of the tractor receives during sowing work, precise information on the level of filling of the feed hopper 5 of his drill, which is advantageous in particular for

large fields.

  The filling level signaling devices 9 and 9 'are provided according to FIG. 2 inside the feed hopper 5 so as to be fixed to the front wall 10 of the feed hopper with the aid of fixing struts 12 and 12 '. The fill level signaling device 9 is provided immediately above the agitator axis 11 and the fill level signaling device 9 'is provided above the fill level signaling device 9. fill level signaling devices 9 and 9 'are connected to the display device 14 by the cables 13 and 13'. The display device 14 comprises control lights, a control 15 being associated with each device of

  fill level signaling 9.

Figure 3 shows the device of

  filling level signaling 9 on an enlarged scale

  die. The signaling device 9 is produced under

  form of a microswitch 16 provided below a

  17 having a peripheral edge 18 directed downwards so as to constitute a cavity 19. This plate 17 is connected to the microswitch 16 by a switch 20 which projects from the upper side 21 with respect to the microswitch 16. The filling level 9 is screwed by means of the screw 22 on the front wall 10 of the hopper by means of the fixing struts 12 attached laterally to the microswitch 16. The cable 13 leaves the inside of the hopper 5 by a bore 23 and is the connection between the microcamminator 16 and the display device 14. The operation of the microswitch 16 will be explained using Figures 4 and 5. For the filling level signaling device 24 shown in Figures 4 and 5, this is another embodiment of the fill level signaling device 9 but which is based on the same principle

  functional. The signaling device 24 is also

  The microswitch 16 is housed in the cavity 19 which is delimited by the peripheral edge 18 directed downwards from the plate 17. The microswitch 16 has holes 25 for fixing it. A switching lever 27 mounted at the point of rotation 26 of the microswitch 16 is connected at its other end to the plate 17. The switching lever 27 is designed to operate

  the switch 20 of the microswitch 16.

The weight of the plate 17 and the edge

  device 18 directed down is chosen so-

  that the switch 20 or the switch lever 27 raises the plate 17 when there is no more product on the plate 17 as shown in Figure 5. In-this raised position of the plate 17, the switch 20 closes a circuit and the display device 14 connected by the cable 13 to the microswitch 16 switches on the indicator light

  of the corresponding microswitch 16. This optimal signal

  that can easily be replaced by an acoustic signal

  tick or be associated with an acoustic signal and signal that the hopper 5 is emptied to a height

  corresponding, hopper in which there is a

  fill level signaling 9 or 24.

Figure 4 shows the plate 17 in

  darkened by the seed 28. In this position, the switching

  The driver 20 is also depressed via the switch lever 27 and the current circuit in the microswitch 16 is turned off. When the weight of

  seed 28 based on the plate 17 decreases, the

  17 and the switch 20 in the direction of the boom 29 by lifting and closing the circuit as soon as there is no product or only very little product on the plate 17. Lines mixed lines indicate a counterweight 30 provided on the edge 18 -directed down, counterweight which can be used to compensate for the weight situation so that the switch

16 works properly.

Claims (5)

A seed drill comprising a frame and a feed hopper which feeds seed coulters with seed products via a metering device, at least one filling level signaling device. being provided in the feed hopper, seed drill characterized in that the filling level indicator (24) is in the form of a microswitch (16), in that on the switching lever (20) 27) of the microswitch (16), a plate (17) is provided and that the plate (17) has a downwardly directed peripheral edge (18).   2) Seeder according to claim 1, characterized in that the peripheral edge (18) delimits a cavity (19).   3) Seeder according to claim 2,   characterized in that the plate (17) and the peripheral edge   that (18) covers the switch (16).   4) Seeder according to claim 1, characterized in that the weight of the plate (17) is dimensioned so that the switch (16) lifts the plate (17) when there is no product on the plate ( 17). Seed drill according to Claim 1, characterized in that the microswitch (16) is connected to a display device (14).   6) Seeder according to claim 1, characterized by a plurality of microswitches (16) provided   in the feed hopper (5) at filling heights   different pleating of the feed hopper (5).   7) Seeder according to claim 1, characterized by a plurality of switches (16) distributed in   the feed hopper (5) in the longitudinal direction tudinal of this hopper (5).