DD213579A1 - DEVICE FOR REGULATING THE WORKING DEPTH OF THE SAESCHARE - Google Patents

Abstract

The invention relates to a device for regulating the working depth of Saeschare to Saemaschinen. It is known to adjust the working depth of the Saeschare hydraulically. A readjustment with different soil conditions does not take place. Next devices are known to ensure that the Saeschare be used delayed when lowering the Saemaschine in the working position to avoid clogging of the Saeschare with earth. It is an object of the invention to provide a continuous control of the working depth combined with controlling the delayed settling of the saver. According to the invention, this is achieved by three electrical switching complexes which are switched as a function of the driving movement of the sowing machine, the position of the sowing machine to the tractor and the position of a ground key to the sowing shares.

Description

Device for regulating the working depth of the Säsohare

field of use

The invention relates to a device for regulating the working depth of the coulters on seed drills or other tools on, agricultural machinery. -

Characteristic of the known technical solutions J

The coulters of seed drills are generally prepared by a Pe of ~ true ge into the ground pushes "the spring force acting in concert ™ be with the respective soil depth _t in the coulter runs in the ground, is one te 11-bar , The tensioning of the spring takes place, for example, by placing a hand lever, as shown in German Offenlegungsschrift 30 00 959. It is also known to hydraulically raise or lower the drill levers with the interposition of a spring-loaded rod and thus the working depth of the coulters to be regeIn ₉ as described in DE-OS 19 02 125.

It is also known from DE-OS 26 31 104, for controlling the working depth of the harvesting tools on beet harvesters on the holder of a Schleifkufe that holds the tools to the desired depth, to steer a button that slides on the ground surface and when changing the Penetration depth of the Schleifkufe performs a movement around its storage. Through a switching part while one of two micro switches is actuated, which turned on an electric or hydraulic adjusting device in the direction of lifting or lowering the sanding blade with the associated Rodewerkzeugen Is by -. ·. ··· "''." - '' · 2

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If this correction reaches the set penetration depth, the switching part of the micro-switch is released and the system remains at rest until the next change,

In practice, this switching arrangement tends to flutter, because the transition from a direction of movement to the rest position is very small and even small clods turn on the system by the vertical movement of the button.

When using seed drills, it is also important to prevent the coulter from clogging them when lowering the earth. For this purpose, special constructions of the lifting mechanism are known, as described in DD 53 440, or fall supports are attached to the drill levers which short the coulters supported on the ground and only after their overturning release again · In these devices is disadvantageous that the coulters must be used while driving the seeder and thus the beginning of sowing can not be determined accurately, causing imperfections occur ^v v / '; ^! : ..., '''' , .. ^r ';. ^;: . ';. -, -. '. '.

Object of the invention

It is an object of the invention to regulate the raising and lowering of the coulters so that they comply with quiet running the set depth and at the same time it is ensured that when lowering the coulters clog these not duroh penetrating earth.

Explanation of the essence of the invention

It is an object of the invention to provide a continuous control of the working depth combined with the control of the delayed settling of the coulters when inserting the seeding machine using a ground scanner and an adjusting device au;

According to the invention this is achieved in that three electrical switching complexes are provided to control the control loop for raising and lowering the coulters, depending on -. '· /'''.'''''':'"'.':'''.^; . '" · 3

From the movement of the seeder, -von.der the position of the drill to the tractor and the position of the ground switch to the coulters are switched. Pur the first switching complex is at least one impeller of the drill via a gearbox connected to a generator whose current acts on an electromagnetic switch in the Hegelkreis, the fall of the current generated by the generator under a predetermined minimum size triggers a control pulse in the direction of "lifting" the coulters * In the second switching complex, a switch is arranged between the frame of the seeder and mounted in a conventional manner to the three-point hitch of the tractor front frame, which triggers a control pulse in the raised position of the drill in the direction of "lifting" the coulters _s the switch after the Placing the wheels of the seeder switched on the ground; becomes. In the third switching complex, three switching contacts are arranged between the holder of the bottom button and the holder of the coulters _s which ¹ Punktionen "lifting" $ "sinks" and "ITuIl ^{11 are} assigned and which are switched by the movement of the bottom switch relative to the coulters" Preferably the timers for delaying the regein are assigned to the switch contacts with the functions "lifting" and "lowering" »The delay is approximately 2. s Switching contacts are expediently designed as contactless contacts that can be switched by a magnet» The freedom of movement is limited by stops «

The working depth regulating device according to the invention causes the coulters to be raised or to remain in the raised position if one of the following three criteria applies:

- at standstill of the drill

, - when lifting the three-point linkage for lifting the ^Sa-: machine or with lifted seeder

- if the coulters are too low in relation to the ground button «

Conversely, the lowering of the coulters is only possible ₉ if none of these three criteria apply »

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At the beginning of the use of the seed drill, the electric control circuit is switched on from the tractor to the seeder. The sowing machine is dug out. The switch between the frame of the seeder and the front frame is closed and thus in position "lifting" · The wheels of the seeder are lifted off the ground, so that the generator does not give off electricity and controlled by him switch is also in position "lifting" , -

At the headland, the seed drill is lowered into working position via the tractor's power lift. When the wheels are resting on the ground and the seed drill has started to move, they start to drive the same mechanism and the generator. The current generated by the generator is applied to the so. Connected magnetic switch to the position "lowering" i Meanwhile, the power lift is lowered so far that the front frame releases the switch on the frame of the drill ι country this switches in position "lowering". The floor buttons hang on excavated cutters opposite to those in the lowest, by a stop, limited position, whereby the switching complex operated by him is on the contact "sinks". This means that / all three switching complexes are now "sinking" and the coulters are sinking into the ground. Once the set working depth has been reached, the magnet connected to the bottom button is connected to the contact "zero" and switches off the downward movement.

In case of deviations upwards or downwards, the magnet on the bottom switch influences the contact "lowering" or "lifting" and effects a correction movement until the setpoint is reached again. The contacts "raise" and "lower" are connected via timers, which cause a delay of about 2 s. It calms the system and does not respond to small rashes caused by clods or similar bumps. «

Is the drill stand, or is the "fall speed is very slow, the generator does not generate electricity and Sa-; coulters are lifted If the seed shares comparable through straw: '.-'''^';' ··. '.: . '.' ... '.:. ;' 5 '.

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stuffs, so can be raised briefly during the Säena the front frame with the Breipunktaufhängung until the switch am'Rahmen 'the seeder is closed. This will raise the coulter © and the straw will remain on the field * The wheels will not be lifted off the ground, so that the drive of the sowing mechanism and thus the grain flow is not interrupted.

By the erfindungs ge MAESSEN control circuit ensures that the coulters are lowered only when driving the drill into the ground, whereby the clogging with earth is avoided »At the same time .erreicht '., That the coulters are lowered only when the drive of the Sowing mechanism runs; so that the grains also flow when the seed coulters are set up. Conversely, the grain flow is only interrupted when the seed coulters are lifted out.

»

With the control device according to the invention, it is possible to drive the drill on the headland exactly to a mark »stop there, to lower the hydraulic lifting device and drive off. The coulters will then automatically penetrate into the ground after passing through a short, always the same length (maximum 0.5 m) and immediately begin sowing.

The invention will be described in detail with reference to a AusführungsbeiSpieles. In the accompanying drawing show

1, a schematic side view of the seed drill and FIG. 2, a coulter with buttons and switches.

On the three-point hitch 1 of the tractor, the seed drill 3 is mounted on the front frame 2, which is supported on the ground when used with the wheels 4. · The blade lever 5 are articulated to the frame of the drill with the coulters 6 «The crowd levers 5 are on spring rods 7th suspended, which in turn hinged to tabs 8 of the rotatably mounted adjusting rods 9

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are. The hydraulic cylinder 10 is the adjusting rod 11 and the frame 9 of the seed drill angeord between a Kurbe! Lever ".net _β. '. ';'. On one of the share levers 5, a bottom button 12 is mounted at 13. Its freedom of movement is limited by the stops 14.

At the free end of the holder 15 of the bottom button 12, a magnet 16 is fixed, which interacted with the non-contact switches E 1, E 2, E Ö

Another switch E 3 is mounted on the seeder 3 so that it engages in the range of movement of the upper link 17 between the drill 3 and the front frame 2. From the impeller 4, the drive for the seeder and the generator 18 is removed »

In seed drills with a large working width several share levers can be grouped together and provided with a bottom button. ,

Claims (7)

, ... Λ. , '-.' '. . ' : ..,. , , 7. , Claim for invention. 1 »Device for controlling the working depth of the seed coulters on seed drills or other tools on agricultural machines operating at a specified depth in the ground and connected to a sliding or rolling button on the ground surface, whose relative movement relative to the tool via switches controls the electrical control circuit Adjusting means on or off, characterized in that three switching complexes are provided for controlling the control circuit for raising and lowering .Saarschare (6), in dependence on the driving movement of the drill (3), from the position of the drill (3) for Tractor and be switched from the position of the bottom button (12) to the coulters (6), 2. Device according to item 1, characterized in that at least one impeller (4) of the seeder (3) via a transmission to a generator (18) is connected, whose current, preferably after passing through an amplifier, an electromagnetic switch in the control circuit applied, wherein the drop of the current generated by the generator (18) below a predetermined minimum size triggers a control pulse in the direction of "lifting" the coulters (6) » 3, device according to item 1 and 2, characterized in that between the frame of the seeder (3) and in a known manner to the three-point hitch (1) of the tractor mounted front frame (2), a switch (E-,) is arranged in the excavated position of the seeder (3) triggers a control pulse in the direction of "lifting" the coulters (6), wherein the switch is switched to the ground after placing the wheels (4) of the seeder (3), .. 8th.       8th 4. Device according to item 1 to 3 », characterized in that between the holder (15) of the bottom button (12) and the holder of the tools, preferably the coulter © (6), switches (E, E ₂ , E) are arranged * * Which the functions "lifting", "lowering" and "zero" are assigned and which are switched by the movement of the bottom button (12) relative to the coulters (6). 5. Device according to point 4 », characterized in that the watch ages with the punctuation functions" lifting "or" lowering "are assigned time elements for delaying the movement, preferably by 2 s _f . 6; Device according to item 1 and 4, characterized in that the _switches% (E-, E _2, E _Q) connected as a contact by a magnet (16) contacts are made " 7. Device according to item 1 and 4 to 6, characterized in that the freedom of movement of the switching elements by stops (14) is limited. For this 1 sheet. Drawings