JPS63109707A - Control device of delivery apparatus - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for controlling a feeding device for seeds, fertilizers, etc. provided in a seeding machine, a fertilizer applicator, etc.

[Prior Art] For example, a seed dispensing device for a seed sowing machine that is attached to a power agricultural machine such as a tractor uses a motor to rotate a dispensing roll that is provided with a plurality of uneven recesses for conveying seeds around its periphery. It is designed to send out seeds in appropriate amounts. The motor for rotating the feed roll is driven by electric power supplied from the power agricultural machine.

[Intermediate Points to be Solved by the Invention] However, since power-powered agricultural machinery undergoes changes in engine rotational speed due to slips and load fluctuations during operation, the conventional feeding device driven by the motor described above has a problem in that the rotational speed of the feeding shaft is limited. There has been a problem in that the material to be supplied, such as a seed, is not necessarily supplied evenly to the supply position in the field (in the case of seeds, within the sowing furrow) because it is not necessarily proportional to the moving speed.

[Means for Solving the Problems] The present invention has been made to solve the above problems, and includes controlling the rotational speed of the delivery roll shaft so that the rotational speed increases or decreases according to the moving speed. A control device for a feeding device is provided.

That is, 1 the control device according to the present invention is a control device for a blowing device such as a seeding machine driven by a motor, and is a pulse generating device that emits pulses in accordance with the rotation of a grounding wheel that rolls on a field surface. and an integrating device that integrates the pulses generated within a set time, and the integrated voltage integrated by the integrating device is compared with the motor driving voltage, and the motor driving voltage is increased or decreased in proportion to the pulse integrated voltage. It is characterized by being equipped with a comparison control circuit that adjusts accordingly.

[Operation] Pulses emitted in response to the rotation of the grounding wheel that rolls on the field are integrated over a certain period of time to create an integrated voltage.

Since the drive voltage of the payout motor varies proportionally, the rotational speed of the motor always adapts to the speed of movement of the machine.

[Embodiment] Fig. 1 shows the usage state of a seeding machine as an embodiment of the present invention.This seeding machine 1 has sowing devices 2.・
... and a ditch covering device 3, each seeding device 2. ... are each attached to a support frame 6 projecting upward from the rear of a powered agricultural machine (tractor) 5,
Further, the trench-making and soil-covering device 3 is attached to a rotary tiller 8 that is towed by a tractor 5. In the rotary tiller 8, a base 10 is connected to a pair of lower links 11, 11 of the tractor 5, and the lower links 11, 111 are rotated up and down by a lift arm 13 via a lift rod 12 to perform rotary tilling. It is designed to raise and lower machine 8.

The trench-covering device 3 is connected to the connecting frame 1 of the rotary tiller 8.
5 is equipped with a machine frame 18 attached to the machine frame 18, and the pitch can be adjusted vertically with a jack 17 at the rear of the machine frame 18! The same number of support rods 20 as the seeding devices 2 are arranged downward in parallel in the zero machine frame 16 in which the seeding devices 8 are provided, and each of the support rods 20 is provided with a groove-making plate 21.
is installed. A parallel link device 23 is provided at the front end of the hitch 18.
There is a soil cover ring 24 located behind each groove plate 21. ...
A suppressing wheel 25 located further behind is attached. In addition, the legs 27 provided at the rear of the stator 18 are provided with a grounding ring 28 that has claws 28a on the outer periphery and rolls on the field as the device moves. A pulse gear 30 is integrally attached to the ground wheel 28,
Every time the teeth of this pulse gear 30 pass in front of the sensor 31, a pulse generator is installed on the hitch 1B! ! A signal is sent to the generator 32 so that the generator 32 generates a pulse. The number of teeth of the pulse gear 30 is, for example, about 30, and generates 30 pulses per rotation of the rolling shaft. Furthermore, a control device 33 is provided on the hitch 18 to control a feeding device 41, which will be described later, using the pulses.

The seeding device 2 includes a seed tank 40 with a hopper-shaped lower part.
．． A feeding device 41 provided directly below the tank. and a transport pipe 42 whose upper end is connected to the lower end of the feeding device and whose discharge port 42a located at the lower end is supported so as to face the bottom of the seeding groove formed by the groove forming plate 21. Become. The feeding device 1i141 has a built-in feeding roll 44 in which a concave portion for holding seeds is formed on the outer periphery of the feeding roll 44.
By the rotation of the seed tank 4θ, seeds in the seed tank 4θ are dropped into the transport pipe 42 in equal amounts. The seeds dropped into the transport pipe 42 pass through the pipe and are supplied into the seeding groove from the discharge port 42a. A shaft 45 of the feeding roll 44 is connected to a rotating shaft 47 of a DC motor 48 provided in the feeding device 41 by a chino, and is rotated by the power of the motor. The driving current from the tractor 5 that is transmitted to the DC motor 4B is
It is controlled by the control device 33.

As shown in FIG. 2, the control device 33 includes an integration device 50 that integrates the pulses generated by the pulse generator 32, and a comparison control circuit 51 calculates the integrated voltage of the pulses at each set time set by the timer 52. The comparison control circuit 51 compares the motor drive voltage with the motor drive voltage, and corrects the motor drive voltage so that it becomes equal to the integrated voltage value. The 81 calculation voltage is reset by the timer 52. FIG. 3 is a circuit diagram of the control device.

The pulse integrated voltage signal and the drive voltage signal integrated by the integration circuit 53 of the integration device are supplied to the comparison circuit 54, and the drive current is controlled by the control circuit 55 according to the comparison result here. Another illustrated example of a control device! Since the stability circuit 58 is provided at t33, the rotation speed of the motor 4B does not change even if the load fluctuates, so that stable operation can be maintained.

Instead of comparing the pulse integrated voltage and the motor drive voltage on a 1:1 basis, the motor drive voltage value may be compared with a value obtained by multiplying the integrated voltage by a certain coefficient. The setting time can be changed as appropriate depending on the seeding interval, etc.

FIG. 4 is a diagram illustrating an example of control. At the start of one work, an initial voltage Vo serving as a reference motor drive voltage is set at A. Then, when a certain period of time T has elapsed, this certain period of time T
The integrated voltage Vc of the pulses integrated within this period is compared with the motor drive voltage Vo. If the integrated voltage Vc and the drive voltage Vo are equal, the drive current is supplied to the motor at the same voltage. Thereafter, the integrated voltage Vc and the drive voltage Vo are similarly compared at fixed time intervals. The integrated voltage Vc becomes lower, and the drive voltage Vo is also lowered accordingly. Further, as at point 0, when the moving speed of the seeding machine 1 increases and the integrated voltage Vc increases, the drive voltage Vo also increases.

In this way, this control device is configured to sequentially change the drive voltage of the motor according to the integrated voltage of pulses that sensitively corresponds to the movement speed, so that the rotational speed of the feeding roll is adjusted to match the movement speed at that time. The speed is well matched and seeds are fed evenly into the sowing furrow.

In the above description, the feeding device of a seeding machine has been described, but the same applies to the case where the device is used as other working machines such as a fertilizing device and a chemical spraying device.

[Effects of the Invention] As is clear from the above description, the control device for the feeding device according to the present invention can faithfully adapt the operating speed of the feeding device for seeds, etc. to the moving speed, so that the feeding device can It is now possible to always supply evenly to the supply locations.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the usage state of a seeding machine which is an example of the present invention, Fig. 2 is a block diagram of the control device, Fig. 3 is a circuit diagram of the control device, and Fig. 4 is an example of control. FIG. l... Seeding machine 2... Seeding device 3... Furrowing and soil covering device 8... Rotary tiller 28... Grounding wheel 30
...Pulse gear 32...Pulse generator 33.
... Control device 41 ... Feeding device 4B ... DC motor 50 ... Integration device 51 ... Comparison control circuit

Claims (1)

[Claims] (1) A control device for a feeding device such as a seeding machine driven by a motor, which includes a pulse generator that emits pulses according to the rotation of a grounding wheel that rolls on a field surface, and a pulse generator that generates pulses within a set time. an integrating device that integrates pulses; and a comparison control circuit that compares the integrated voltage integrated by the integrating device with the motor driving voltage and adjusts the motor driving voltage to increase or decrease in proportion to the pulse integrated voltage. A control device characterized by comprising: