JPH0130026Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a handling depth control device for a combine harvester or the like, and more particularly to a handling depth control device having a handling depth adjustment conveyor operated by a motor.

Conventionally, handling depth control devices have provided upper and lower limit stop switches at predetermined positions to limit the adjustment stroke of the handling depth adjustment conveyor. For this reason, it is very difficult to set the upper and lower limit positions for adjusting the handling depth, and the loss time during assembly is large.Also, once set, it is difficult to change, resulting in short or long culms. had poor adaptability.

Therefore, in the present invention, a potentiometer is provided in conjunction with the handling depth adjustment conveyor, and a shallow handling side setting device and a deep handling side setting device are also provided. and are respectively connected to comparators, and the motor for controlling the depth of handling is stopped when the signal from the potentiometer reaches a predetermined value set by the setting device, thereby eliminating the above-mentioned drawbacks. The purpose is to provide a device.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the combine 1 has a fuselage 2
It has a divider 3 and a cutting blade 5 in front of it, a grain culm conveying device 6 and a handling depth adjustment conveyor 7 are arranged behind it, and a handling barrel 9 is further provided on the downstream side of the conveyor 7. A feed chain 10 is provided. Further, a handling depth sensor 11 is disposed adjacent to the handling depth adjustment conveyor 7.
has a shallow handling command switch 11a and a deep handling command switch 11b which are operated at the tip of the grain culm transported by the transporting body 7. On the other hand, aircraft 2
As shown in FIG.
and manual switch 13 for deep handling command 13b, shallow handling side setting device 15a and deep handling side setting device 1
5b is arranged.

As shown in FIG. 3, a drive case 17 is fixed to the fuselage 2 via a bracket 16.
Further, a shaft 19 is rotatably supported on the drive case 17, and a motor 20 is fixed to the upper part of the shaft 19, and the rotation of the motor 20 is transmitted to the shaft 19 via an arm 21 and a speed reduction device inside the case 17. has been done. Further, an arm 22 is fixed to the shaft 19 outside the case 17, and the arm 22 is connected to a link 25 pivotally supported on the handling depth adjustment carrier 7 via a link 23 whose length can be adjusted. At the same time, the link 23 is also connected to a link 26 that is pivotally supported on the fuselage 2. Also, the link 2
A spring 27 is tensioned between 6 and the body 2 to balance the weight of the handling depth adjusting carrier 7.

On the other hand, as shown in FIG. 4, a potentiometer 3 is mounted on a plate 29 fixed to the bracket 16.
0 is fixed, and the shaft portion 30a of the meter 30
is fixed to the shaft 19 by a set screw 31, and the shaft 19
Therefore, it rotates depending on the position of the handling depth adjustment conveyor 7, and its resistance is increased or decreased.

As shown in FIG. 5, there is an automatic shallow handling command switch 11a, a deep handling command switch 11b, and a manual shallow handling command switch 1.
3a, a deep handling command switch 13b, a shallow handling side setting device 15a, a deep handling side setting device 15b, a motor 20, and a potentiometer 30 are connected. In the figure, 31a and 31b are relay coils that switch the contacts 31'a and 31'b, respectively, TUa and TUb are timer units that emit predetermined pulses, and Tr1 to Tr4 are transistors,
32a and 32b are the signals from the potentiometer 30 and the shallow and deep setting devices 1, respectively.
This is a comparator that compares the signals from 5a and 15b.

Since this embodiment has the above-described configuration, prior to the reaping work, the operator can appropriately set the shallow handling side setting device 15a and the deep handling side setting device 15b using the scales according to the height of the reaped grain culm. do. In this state, when the manual switch 13 is operated to turn on the shallow handling command switch 13a, the transistor Tr1
The coil relay 31a is energized via the contact 3
1'a is switched to rotate the motor 20 in the shallow handling direction a. Then, the arm 31 and drive case 17
The decelerated rotation is transmitted to the shaft 19 through the transmission device inside, and the arm 22 is rotated in the shallow handling direction A.
Further, the handling depth adjusting conveyor 7 is also rotated in the same direction via the links 23 and 25, and moved in the shallow handling direction. On the other hand, as the shaft 19 rotates, the potentiometer 30
is rotated in the shallow direction A, and when the voltage from the potentiometer 30 becomes equal to the set voltage of the setting device 15a, the comparator 32a outputs 1, actuating the transistor Tr3, and reducing the potential at point X to 0. west,
Turn off transistor Tr1 and close relay contact 3
1'a is opened to stop the rotation of the motor 20. Thereby, the handling depth adjustment conveyance body 7 stops at the shallowest position set by the setting device 15a. Conversely, when the deep handling command switch 13b is turned on, the motor 20 rotates in the deep handling direction b, moves the handling depth adjustment conveyor 7 in the deep handling direction B, and at the same time the potentiometer 30 The motor 20 is also rotated in the deep handling direction B, and the potential at the Y point becomes 0 based on the comparator 32b, and the motor 20 is stopped in correspondence with the deepest position set by the setting device 15b.

Generally, during the cutting operation, the cutting depth is automatically controlled by the cutting depth sensor 11. That is, when the shallow handling command switch 11a is turned on,
A predetermined pulse signal is transmitted by the timer unit TUa, and the relay coil 31a is intermittently excited via the transistor Tr1. As a result, the motor 20 is intermittently rotated in the shallow handling direction A, and the handling depth adjusting conveyance body 7 is controlled in the shallow handling direction A by an inching operation. Similarly, when the deep handling command switch 11b is turned on, the conveyor 7 is controlled in the deep handling direction B by an inching operation. Note that even in the automatic control state based on the handling depth sensor 11, if the conveyance body 7 is attempted to be controlled beyond the upper and lower limit positions based on the setting devices 15a and 15b, the comparator 32a or 32b outputs 1 and the corresponding The conveyor 7 stops at the upper limit or lower limit position.

As explained above, according to the present invention, instead of the upper and lower limit stop switches, the potentiometer 30 linked to the handling depth adjustment conveyor 7, the shallow handling side setting device 15a and the deep handling side setting device are used. 15b, it is extremely easy to set the upper and lower limit positions for adjusting the handling depth, eliminating loss time during assembly, and freely adjusting the stroke of the handling depth during work. This allows for optimal and wide-ranging handling depth control depending on the height of the grain culm.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing a combine harvester to which the present invention can be applied, FIG. 2 is a perspective view showing the driver's seat,
Figure 3 is a front view showing the driving part for depth control, Figure 4 is a sectional view showing the potentiometer part, and Figure 5 is a sectional view showing the potentiometer part.
The figure is a circuit diagram according to an embodiment of the present invention. 1... Combine harvester, 7... Handling depth adjustment conveyor,
11... Handling depth sensor, 13... Manual switch, 15a... Shallow handling side setting device, 15b... Deep handling side setting device, 20... Motor, 30... Potentiometer, 32a, 32b... …comparator.

Claims (1)

[Scope of utility model registration request] In a handling depth control device having a handling depth adjustment conveyor operated by a motor, a potentiometer is disposed in conjunction with the handling depth adjustment conveyor, and a shallow handling side setting device and a deep handling side setting device are provided. A depth control system in which a setting device is provided, the setting device and potentiometer are each connected to a comparator, and the motor is stopped when the signal from the potentiometer reaches a predetermined value set by the setting device. Device.