JPS60744Y2 - Sensor device for mobile agricultural machinery - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sensor device for a mobile agricultural machine, and particularly to a direction control sensor device for a combine harvester.

Conventional direction control sensor devices sense the distance of the aircraft to the culm row and control based on the signals.

Therefore, in this method, for example, when the aircraft approaches the culm row and reaches a predetermined distance, the sensor device issues a signal for the aircraft to move away from the culm row, but until the aircraft actually starts operating according to the command of the signal. There is a certain amount of time delay during which the aircraft approaches the culm row.

For this reason, even if the aircraft stops approaching and starts traveling parallel to the row of shell culms, the sensor device continues to emit a separation signal because the aircraft is located within a predetermined distance from the row of shell culms.

When the aircraft leaves the signal area away from the sensor device,
The aircraft is heading away from the culm row, and this time the opposite phenomenon to that described above will occur.

As a result, the aircraft alternately approaches and moves away from the culm, performing hunting.

Therefore, the present invention is designed to prevent the aircraft from hunting by immediately cutting off the signal that has been flowing up until now when the operating direction of the sensor changes, for example when the aircraft approaches or moves away from the culm row. It is an object of the present invention to provide a sensor device for a mobile agricultural machine that eliminates over-operation such as the above and allows smooth control.

Embodiments of the present invention will be described below based on the drawings.

The divider frame 1 of the combine is equipped with a direction control sensor device 2.

The direction control sensor device 2 has a sensor 3 consisting of a parallel link, the rear link 5 of the sensor 3 being connected to a shaft 7 rotatably supported in the casing 6 of the sensor device 2.
is fixed.

An arm 8 is fixed to the shaft 7, a pin 10 is fixed to one end of the arm 8, and a plate 11 is fixed to the other end.

A spring 13 is interposed between the arm 8 and a pin 12 attached to the casing 6, and urges the arm 8 clockwise in FIG.

Two mounting plates 15 and 16 are rotatably supported on the shaft 7, and left and right microswitches 17 and 18 for direction control are respectively mounted on the mounting plates 15 and 16.

The microswitches 17 , 18 are each provided with actuators 20 , 21 on opposite sides, which actuators 20 , 21 can abut against the pin 10 of the arm 8 .

Furthermore, resistors 22.2 are installed above the mounting plates 15 and 16, respectively.
3 is installed.

As shown in detail in FIG. 3, the resistors 22 and 23 are pressed by a spring 25 against a guide plate 27 fixed to the casing 6 via a steel ball 26, and the resistors 22 and 23 press against the circumferential surface of the guide plate 27. It can be slid along while providing resistance.

Also, a spring 2 is placed in front of the microswitches 17 and 18.
Switch push rod 30.3 energized by 8, 29
1 is slidably arranged on the plate 11 of the arm 8, and the pressing rods 30, 31 are attached to the arm 8 as shown in FIG.
When the mounting plates 15 and 16 are substantially parallel, the bolts 32 and 33 are adjusted so that there is a small gap between the front ends of the microswitches 17 and 18.

A pin 35 is attached to the upper wall of the casing 6,
The pin 35 can come into contact with the left and right resistors 22, 23, and in this abutting state, the pin 10 of the arm 8 forms a dead zone in which it does not contact either the left or right microswitches 17, 18.

The left and right microswitches 17, 18 are connected to the left and right solenoids 37. of the solenoid valve 36, as shown in FIG.
38, and the solenoid valve 36 communicates and discharges the pressure oil of the pump 40 to and from hydraulic cylinders 41 and 42 that actuate the left and right clutches, respectively, depending on the control position thereof.

Next, the effects of the present invention will be explained based on FIG.

During combine harvester operation, when the machine approaches a row of shell culms 43 by a predetermined distance or more, the sensor 3 is pushed by the shell culms and rotates, resulting in the state shown in FIG. 4.

The rotation of the sensor 3 causes the shaft 7 to rotate via the rear link 5, and the arm 8 fixed to the shaft 7 also rotates.

The rotation of the arm 8 causes the pin 10 to contact the actuator 21 of the right microswitch 18, turning the switch 18 on, and simultaneously rotate the mounting plate 16 in the same direction against the resistance of the resistor 23.

At this time, the mounting plate 15 is attached to the plate 11 by the rotation of the arm 8.
Due to the movement of , the switch pressing rod 30 comes into contact with the front end of the microswitch 17 and is applied with a pressing force by the spring 30, but since the resistor 22 is in contact with the pin 35, it returns to its original neutral position. is maintained.

The solenoid 38 is operated by one person operating the micro switch 18, and the solenoid valve 36 is slid in the right direction in FIG.

As a result, pressure oil from the pump 40 is sent to the right hydraulic cylinder 42, the right clutch is disengaged, and the aircraft is steered to the right to move away from the culm 43.

When the body moves to the right and the sensor device 3 rotates clockwise in FIG. 4, the arm 8 also rotates in the same direction via the rear link 5 and shaft 7.

However, at this time, the microswitch 18 is given resistance by the resistor 23, and there is a gap between the switch pressing rod 31 and the front end of the microswitch 18, so the microswitch 18 cannot immediately follow the action. zu, pin 1
0 is removed from the actuator 21 of the microswitch 18, the switch 18 is turned off, and the solenoid valve 36 is turned off.
Set it to the neutral position and move the aircraft straight parallel to the culm row.

Normally, there is a time delay between the signal and the actual operation, so the direction of movement of the aircraft may change toward or away from the culm row before the distance between the aircraft and the culm 43 has reached a predetermined value. By sensing the point and issuing a signal, the actual operation can be made to keep the aircraft parallel to the culm row 43.

Now, as the direction of travel of the aircraft is slightly tilted and the aircraft gradually moves away from the culm, the sensor 3 further rotates clockwise, and the switch pressing rod 31 contacts the front end of the micro switch 18 and presses against the spring 29. Then, the microswitch 18 follows the movement of the arm 8 while maintaining a gap between the pin 10 and the actuator 21, and returns to the neutral position shown in FIG.

When the aircraft further moves away from the culm and reaches a predetermined distance, pin 10 is connected to actuator 20 of microswitch 17.
In the same manner as described above, the left solenoid 37 is activated, the solenoid valve 36 is slid, the left hydraulic cylinder 41 disengages the left clutch, and the aircraft is steered to the left to reach the shell culm 43. get closer to

As explained above, according to the present invention, when the operating direction of the sensor changes, for example, when the combine harvester moves towards or away from the culm row,
The signal that had been flowing until now was cut off immediately, so
It is possible to prevent over-actuation due to normal operation delays, such as hunting of the aircraft due to a delay in disengaging the clutch when the aircraft approaches or leaves the culm, and smooth control becomes possible.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a sensor device according to the present invention;
The figure is a cross-sectional view taken along the line ■-■ in Figure 1, Figure 3 is a cross-sectional view showing the resistor used in the present invention, and Figure 4 is a state in which the aircraft approaches the culm in order to explain the action of the present invention. FIG. 5 is a plan view of a sensor device showing the present invention, and FIG. 5 is an electric/hydraulic circuit diagram when the present invention is used for direction control. 2... (direction control) sensor device, 3...
...Sensor, 8...Arm, 10...
・Pin, 15, 16...Micro switch, 1
7,18...Mounting plate, 20.21...
Actuator, 22, 23...Resistor, 28,
29... Spring, 30, 31...
Switch push rod.

Claims (3)

[Scope of utility model registration request] (1) An arm connected to a sensor; a microswitch that emits a signal when the arm moves in one direction; and a microswitch that can move in conjunction with the arm; the microswitch emits the signal when the arm moves in the other direction; A sensor device for a mobile agricultural machine configured to cut off the arm and follow the arm with a delay. (2) a pin is fixed to the arm, and the pin is capable of abutting actuators provided on opposing sides of the two microswitches each mounted on a rotatably supported mounting plate; Further, these microswitches are provided with resistance to their rotation by a resistor, and at the same time can be biased in the direction of returning to the neutral state by a switch pressing rod that does not come into contact with the microswitch in a state substantially parallel to the arm. The sensor device according to claim (1) of the utility model registration, configured as follows. (3) The sensor device according to claim (1) or (2) of the utility model registration, wherein the sensor is a sensor for direction control in a combine harvester.