JPS6211213Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention incorporates a hydraulic clutch type multi-stage transmission mechanism into a traveling transmission, for example, and includes a plurality of shift push button switches for controlling the transmission mechanism, and the traveling transmission is changed by operating the push button switches. and a vehicle speed control sensor that interlocks and operates the transmission mechanism in proportion to an increase or decrease in threshing load, etc., and automatically changes the traveling speed. A deceleration stop circuit that interrupts deceleration control, a continuous speed increase circuit that automatically controls the speed increase in stages, and a delay timer that activates the continuous speed increase circuit after a certain period of time delay after the deceleration stop circuit stops deceleration. By providing this, the automatic speed increasing operation can be performed properly,
The deceleration stop circuit and the continuous speed increase circuit can be reliably operated in conjunction with each other, the speed can be increased safely and quickly by the speed increase output of the vehicle speed control sensor, and smooth vehicle speed control operation can be obtained, as well as speed change. It is an object of the present invention to provide a vehicle speed control device for a harvester that eliminates malfunctions and allows long-time harvesting operations to be carried out efficiently and easily.

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

Fig. 1 is a side view of the combine harvester, and Fig. 2 is a plan view of the same. In the figure, 1 is a truck frame equipped with a traveling transmission 2 incorporating a hydraulic clutch type multi-stage transmission mechanism at the center of the front end, and 3 is the truck frame. A running crawler is installed on both sides of the track frame 1 via a drive sprocket 4 and a track roller 5, etc., 6 is a machine base supported by the track frame 1 via a rotation fulcrum shaft 7 and an elevating cylinder 8, and 9 is on the left side. A threshing section in which the feed chain 10 is stretched and a handling cylinder 11 is built in, 12 is a reaping section equipped with a cutting blade 13 and a grain culm conveying mechanism 14, 15 is a straw cutting section provided on the rear side of the threshing section 9, and 16 18 is an engine that drives each part of the combine; 19 is a driver's cab equipped with a driver's seat 20 and a driving operation section 21; 22 is the aforementioned The power shift traveling speed change operation unit 23, 23 provided inside the driver's cab 19 is a side clutch lever, and is configured to continuously reap and thresh grain culms.

As shown in FIG. 3, the traveling speed change operating section 22 is equipped with a manual main shift operation circuit 24 for electrically changing the driving speed of the traveling crawlers 3, 3, for neutral, reverse, and 1st to 3rd forward speeds. The pushbutton switches 25, 26, 27, 28, 29 are incorporated into the circuit 24, and hold coils 30, 31, 32, 33 for holding each switch 26 to 29 in the operating position when operated, and the coil 30, 3
a self-holding switch 34 that self-holds the switches 1, 32, and 33 and returns the subsequent switches 27 to 29;
35, 36, 37, and switches 26 to 28 in the previous stage
release switches 38, 39, 40 for returning the
Main gear shift output switch 4 for reverse and forward 1 to 3 speeds
1, 42, 43, 44 and each switch 26 to 29
A neutral switch 45 for returning all the gears to the original position is provided, and a manual main shift operation is performed via each of the push button switches 25 to 29.

Similarly to the above, a manual auxiliary shift operation circuit 46 is provided in the travel shift operation section 22, push button switches 47, 48, and 49 for low speed, medium speed, and high speed are incorporated into the circuit 46, and each switch 47 to 49 is operated. hold coils 50, 51, 52 that hold the coils in the operating position; self-holding switches 53, 54, 55 that self-hold the coils 50 to 52 and return the later switches 48, 49; and the previous switch 47. , 48, and switches 58, 59, 60 for outputting low-speed, medium-speed, and high-speed sub-shifts, and manual sub-shifts are carried out via each push button switch 47, 48, 49. Form it like this.

In addition, the threshing machine is provided with an automatic speed change operation circuit 62, which is a vehicle speed control sensor including a work load detection device 61 that detects the rotation of the threshing drum 11, which changes in proportion to the increase or decrease in the threshing load. A non-magnetic disk 63 that rotates in conjunction with the threshing drum 11 is provided with a plurality of permanent magnets 64 at equal intervals on the outer periphery.
A reed switch 65 fixedly supported adjacent to the disk 63 is turned on and off by the rotation of the magnets 64....
The device 61 is formed so that the reed switch 65 is connected to the reed switch 65, and the number of revolutions of the throttling drum 11 is converted into an electric signal and outputted. On the other hand, a comparator 69 outputs an increase-speed signal through a photocoupler 68 when the signal output level of the amplifier 67 is equal to or higher than a preset level (light load).
The circuit 62 is provided with a comparator 71 which outputs a deceleration signal via a photocoupler 70 when the signal output level of the amplifier 67 is below a set level (overload), and a comparator 73 which outputs an emergency stop signal via a photocoupler 72 when the signal output level of the amplifier 67 drops significantly (abnormal overload), and is configured to output speed increase, speed decrease and stop signals in accordance with an increase or decrease in the threshing load.

Furthermore, the main shift signals for reverse and 1st to 3rd forward speeds of the manual main shift operation circuit 24, the auxiliary shift signals for low to high speeds of the manual auxiliary shift operation circuit 46, and the increase/deceleration and stop signals of the automatic shift operation circuit 62 are transmitted. It is equipped with a speed change control circuit 74 that inputs each input, and is turned on when the reaping section 12 and the threshing section 9 are driven in conjunction with an automatic speed change switch 75 provided in the operation operation section 21 and a reaping and threshing clutch lever 76 of the section 21. A PTO switch 77 is connected in series to the circuit 74, and a grain culm detection switch 79 of a short culm detection sensor 78 for adjusting long and short culms provided on the grain culm supply side of the handling barrel 11 is connected to the circuit 74, When the switches 75 and 77 are turned on, the automatic shift operation circuit 62 is connected to the circuit 74 after a certain period of time by turning on the switch 79, and the manual shift operation is changed to an automatic shift operation. An automatic return switch 80 is connected to the circuit 74, and each of the switches 75, 77, 79,
A vehicle speed control switch circuit 81 including 80 is formed.

Next, solenoids 82, 83, 84, 85 for reverse and 1st to 3rd forward speeds (not shown) are used to switch the hydraulic clutch type multi-stage main transmission mechanism (not shown) built into the traveling transmission 2.
are connected to the shift control circuit 74, and lamps 86, 87, 88, 89 for indicating the main shift position are connected in parallel to the solenoids 82 to 85, respectively.
Similarly to the above, the low speed, medium speed, and high speed solenoids 90, 91, and 92 of the hydraulic electromagnetic switching valve (not shown) for switching the hydraulic clutch type multi-stage auxiliary transmission mechanism (not shown) built in the traveling mission 2 are used to change the speed. Lamps 93, 94, and 95 are connected to the control circuit 74 to indicate the sub-shift position to each solenoid 90 to
92, respectively, and an automatic lamp 96 and an automatic speed change operation circuit 6 for displaying automatic speed change operation.
A stop lamp 97 and a stop buzzer 98 for notifying the abnormal output of No. 2 are connected to the circuit 74, respectively.

As shown in FIG. 4, the shift control circuit 74 includes a manual main shift circuit 99, and reverse and 1st to 3rd speed solenoids 82, 83, 84, 85 are connected to the manual main shift operation circuit 24 via the circuit 99. The transmission control circuit 74 is connected in an interlocking manner to energize one of the solenoids 82 to 85 corresponding to each of the pushbutton switches 26 to 29 to perform a manual gear shift operation.
includes a manual sub-shift circuit 100, in which low-speed to high-speed solenoids 90, 91, 92 are interlockedly connected to the manual sub-shift operation circuit 46 via the circuit 100, and each pushbutton switch 47-49 is It is formed so that one of the solenoids 90 to 92 is energized to perform a manual sub-shift operation.

The speed change control circuit 74 includes an automatic speed increase control circuit 101, an automatic deceleration control circuit 102, and a speed increase/deceleration switching circuit 103 that controls the operation of each circuit 101, 102. The respective circuits 101 and 102 are selectively connected to the speed change operation circuit 62, and the solenoids 83 to 85 and 90 are controlled by the increase/decelerate signal output of the circuit 62 corresponding to the increase/decrease in the threshing load of the handling drum 11. ~92 is excited to automatically change the traveling speed. A stop lamp 97 and a stop buzzer 98 are connected to the switching circuit 103, and the lamp 97 is turned on in response to an emergency stop signal output from the circuit 62 corresponding to an abnormal increase in the threshing load of the handling drum 11, and the buzzer 98 is turned on.
It is formed so that it sounds and alerts the user.

Further, the speed change control circuit 74 includes a vehicle speed control mode switching circuit 104, and a manual main and sub-speed change circuit 9.
9, 100, a vehicle speed control switch circuit 81 is connected to the acceleration/deceleration switching circuit 103 and the automatic display circuit 105 via the circuit 104, and an operating power source 107 is connected to the switching circuit 104 via the power switch 106. selectively applying it to each circuit 99, 100 or each circuit 103, 105,
Formed to switch between manual control and automatic control.

Next, a speed increase instruction circuit 108 applies the speed increase signal outputted via the comparator 71 and photocoupler 70 of the automatic speed change operating circuit 62 through the switching circuit 103, and an automatic a deceleration stop circuit 109 that automatically interrupts deceleration control by turning off the deceleration control circuit 102; and delay timers 110 and 111 that output a speed increase signal after a fixed time delay after the deceleration stop circuit 109 stops deceleration; delay timer 11
A continuous speed increase circuit 112 that automatically increases the traveling speed in stages by outputting a speed increase signal of 0, and a speed change that detects which of the forward 1st to 3rd speed solenoids 83 to 85 is energized. The detection circuit 113 and 1
A shift reset circuit 114 that turns off the solenoids 83 and 84 for 2nd and 2nd speeds in the direction of speed increase, a speed increase output circuit 115 that turns on the solenoids 84 and 85 for 2nd and 3rd speeds in the direction of speed increases, and 3rd speed. 3 forward speed detection circuit 1 that detects the excitation operation of the solenoid 85
16, a delay timer 117 that outputs a sub-shift speed increase signal with a certain time delay after the third forward speed is detected by the circuit 116, a medium speed and high speed solenoid 91,
Speed increase instruction circuit 11 that turns on 92 in the speed increase direction
8 constitutes the automatic speed increase control circuit 101, and activates the continuous speed increase circuit 112 after a fixed time delay after the deceleration stop circuit 109 stops deceleration, and operates the continuous speed increase circuit 112 by the speed increase signal output from the automatic speed change operation circuit 62. The system is designed to automatically increase the traveling speed in stages.

The present invention is constructed as described above, and each of the pushbutton switches 25 to 29 for the main shift and each of the pushbutton switches 47 to 49 for the auxiliary shift are manually operated, and the solenoids 82 to 85 and 90 to 92 are appropriately operated. The magnet is excited, the desired traveling speed is obtained by manual shift operation, and the automatic shift operation circuit 62 is operated by operating the automatic shift switch 75 or the automatic return switch 80.
The traveling speed is increased/decreased according to the increase/decrease in the threshing load using the increase/decrease signal.

In addition, when the combine harvester is run to continuously perform reaping and threshing operations, for example, when the supply amount of reaped grain culms decreases, the threshing load decreases, and the rotation of the handling drum 11 becomes faster, the rotation of the handling drum 11 becomes faster. is detected by the workload detection device 61, and the speed increase signal generated in the comparator 69 is sent to the photocoupler 6.
8, which outputs the speed increase/deceleration switching circuit 1.
When the speed increase signal is applied to the speed increase instruction circuit 108 via the speed increase instruction circuit 108, the automatic deceleration control circuit 102 is turned off by the deceleration stop circuit 109, and the automatic deceleration control circuit 102 is turned off via the delay timer 110 for a certain period of time (in the direction of speed increase). The continuous speed increase circuit 112 is operated after the time required to shift one gear), and the main speed is increased in stages after a certain period of time via the speed increase output circuit 115. Excitation forward 3 speed detection circuit 11
6 and when the main gear is in forward 3rd gear,
The speed of the sub-shift is increased in stages after a certain period of time via the speed-increase instruction circuit 118 and, similarly to the main shift, via the delay timer 117.

As shown in the embodiments above, the present invention provides a deceleration stop circuit 1 that automatically interrupts deceleration control based on the speed increase output of a vehicle speed control sensor such as the automatic speed change operation circuit 62.
09, a continuous speed increase circuit 112 that automatically controls the speed increase in stages, and the deceleration stop circuit 10.
A delay timer 110 is provided to activate the continuous speed increase circuit 112 after a certain period of time after the deceleration is stopped by step 9, so that the automatic speed increase operation can be properly performed. The speed circuit 112 can be operated in a reliable manner, and the speed can be increased safely and quickly by the speed increasing output of the vehicle speed control sensor 62, and smooth vehicle speed control operation can be obtained. It is possible to maintain an appropriate running speed, eliminate gear shift malfunctions, and perform long harvesting operations efficiently and easily.
It has remarkable effects such as being extremely practical.

[Brief explanation of the drawing]

FIG. 1 is a side view of a combine harvester showing an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is an electrical circuit diagram of the main part, and FIG. 4 is a block diagram thereof. 62...Automatic speed change operation circuit (vehicle speed control sensor), 109...Deceleration stop circuit, 110...Delay timer, 112...Continuous speed increase circuit.

Claims (1)

[Scope of utility model registration request] a deceleration stop circuit that automatically interrupts deceleration control based on the speed increase output of the vehicle speed control sensor; a continuous speed increase circuit that automatically controls the speed increase in stages;
A vehicle speed control device for a harvester, characterized in that it is configured to include a delay timer that activates a continuous speed increase circuit after a certain period of time delay after the deceleration stop circuit stops deceleration.