JPS6211386Y2 - - Google Patents

Description

[Detailed explanation of the invention] Generally, when the handling depth adjustment body is raised and lowered all at once to automatically adjust the handling depth, there is a drawback that the handling depth adjustment body overruns and causes hunting. It is desirable that the adjustment speed be somewhat slow.

Therefore, the inventor of the present invention inserted a timer unit that emits a pulse signal into the handling depth adjustment circuit and caused the handling depth adjustment body to move up and down intermittently, and was able to solve the above-mentioned drawback, but the culm length suddenly increased. When there is a large change in the processing depth, the operating speed of the handling depth adjustment body is delayed and rapid response cannot be taken, resulting in overload on the handling cylinder, resulting in unhandled or spilled culm.

This invention prevents the handling depth adjustment body from overrunning and causing hunting when automatically adjusting the handling depth.
In addition, if the culm length changes suddenly and greatly and the handling depth adjustment body has to be operated greatly all at once, the required handling depth can be adjusted rapidly and there is no overload on the handling barrel, unhandled culm, or culm. The purpose of this invention is to provide an automatic handling depth adjustment device for a combine harvester that does not cause any damage, and a timer unit that emits a pulse signal is inserted into a control circuit that moves the handling depth adjustment body in response to a culm length detection signal. However, the pulse of the timer unit is characterized in that the operating speed is changed in proportion to the operating amount of the handling depth adjuster.

The embodiment shown in the drawings will be explained below.1
is a threshing device mounted on the platform of a combine harvester, and between the reaping device 2 and the threshing device 1 installed in front of it, there are clamping rails and a conveyor chain that tilt diagonally up and down with the front part as the center. A handling depth adjustment body 3 consisting of the following is provided, and a culm length detector 5 is provided in the tip passage between the control section 4 and the handling depth adjustment body 3 provided on the other side.

A motor 6 that drives the handling depth adjuster 3
and the power supply 7 are connected by a parallel raising control circuit 8 and a lowering control circuit 9, and the raising control circuit 8 and the lowering control circuit 9 are connected to each other.
A timer unit 10 is inserted in the culm length detector 5 to generate an inching pulse when the sensor 5a of the culm length detector 5 no longer detects the tip and turns OFF, and the relay 11 is turned ON by the inching pulse of the timer unit 10. , OFF are repeated to rotate the motor 6 in the forward direction and tilt the handling depth adjuster 3 upward.

In addition, a timer unit 10' is inserted in the lowering control circuit, and the input signal is input to generate an inching pulse when the sensor 5b detects the tip and turns on.The relay 11' is activated by the inching pulse of the timer unit 10'. , since the motor 6 rotates in the reverse direction, the handling depth adjuster 3 tilts downward.

In the drawing, reference numeral 12 is a stalk switch that is turned on when the grain culm passes through the grain, and limit switches 13 and 13' are limit switches that limit the tilting range of the handling depth adjuster 3.

The width of the pulses output from the timer units 10, 10' is small at first, as shown in FIG. When the amount of actuation by the pulse gradually increases and a wide range of depth adjustment is required, the depth adjustment body 3 can be tilted rapidly, and since it is driven intermittently, the depth adjustment body adjusts its amount of operation. Despite the large size, there is no overrun.

Furthermore, when the amount of adjustment of the handling depth is relatively small, when the timer units 10 and 10' are inputted as shown in the upper part of FIG. Appropriate handling depth adjustment can be performed without any problems.

Note that the pulse width may be constant and the intervals may be set gradually smaller.

As mentioned above, the present invention inserts a timer unit that emits a pulse signal into the control circuit that moves the handling depth regulator in response to a culm length detection signal, and adjusts the pulse of the timer unit to the operating amount of the handling depth regulator. The operating speed has been changed so that it increases proportionally, so if you start mowing from the deepest handling state at the start of work, or if the culm length changes suddenly and greatly, such as when changing fields, the handling depth can be adjusted. The body can rapidly adjust the required handling depth and prevent overloading the handling barrel or underhandling.
Alternatively, spillage of the culm can be prevented.

Furthermore, since the operating speed of the handling depth adjustment body changes in stages, when the amount of change in culm length is small, such as when reaping and threshing work is continued, a stable handling depth can be maintained while preventing hunting due to overrun. Adjustments can be made.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Figures 1 and 2 are a plan view of the combine harvester, Figure 3 is a control circuit diagram, Figure 4 a is a pulse diagram for large-width handling depth adjustment, and Figure b is a small width handling depth adjustment. Fig. 5 is a pulse diagram for the case where the processing is performed, and Fig. 5 is an operation diagram of the handling depth adjusting body. 3... handling depth adjustment body, 5a, 5b... sensor, 8... raising control circuit, 9... lowering control circuit,
10, 10'... Timer unit.

Claims (1)

[Scope of utility model registration request] A timer unit that emits a pulse signal is inserted into a control circuit that moves the handling depth regulator in response to a culm length detection signal, and the pulses of the timer unit are adjusted so that the operating speed increases in proportion to the amount of operation of the handling depth regulator. An automatic handling depth adjustment device for a combine harvester, characterized in that it is changed so that