JPH05338478A - Mobile agricultural machine - Google Patents

Abstract

PURPOSE:To easily correct the running speed when an engine is restarted so as to improve the safety and operating efficiency by keeping the stop of an actuator when the engine is stopped by means of a sensor for detecting the stop of the engine. CONSTITUTION:A main clutch switch 63, a speed increasing switch 64, a road running switch 65, a speed change potentiometer 66, a feedback potentiometer 67 and a regulator 68 for connecting a generator of an engine to a battery are connected to a running speed change control circuit 69. The output of the running speed change control circuit is connected to speed increasing and decreasing circuits 70, 71 of a speed change motor 61 for changing the speed of a continuously variable transmission mechanism through a manual switch 72. When an engine is stopped, the stop is detected from the voltage of the regulator 68 to keep the stop of the speed change motor 61. Accordingly, the speed change position is kept without applying forcible operating force to the continuously variable transmission mechanism, and when the engine is restarted, the running speed is easily corrected so as to improve the safety and handling operation efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile agricultural machine such as a rice transplanter equipped with a seedling table and a planting claw for continuously performing seedling planting work.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 3-56760, there has been a technique for operating a continuously variable transmission mechanism by an actuator to change the transmission speed of a belt.

[0003]

The above-mentioned prior art has a safety problem in that the actuator operates even when the engine is stopped and the belt or pulley is easily damaged.

[0004]

SUMMARY OF THE INVENTION However, according to the present invention, a sensor for detecting engine stop is provided in a mobile agricultural machine provided with an actuator for operating a continuously variable transmission mechanism and continuously changing the traveling speed by the actuator control. Provided,
The actuator is configured to be stopped and maintained by the sensor when the engine is stopped. Even if the engine is stopped, the operation of the actuator is blocked. Therefore, it is possible to prevent an unreasonable operating force from being applied to the continuously variable transmission mechanism. ,
Since the shift position is maintained, the traveling speed can be easily corrected when the engine is restarted, and safety and handling operability can be easily improved.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a side view of a travel speed change control circuit, FIG. 2 is a side view of a passenger rice transplanter, and FIG. 3 is a plan view of the same. In FIG. 1, (1) is a traveling vehicle on which an operator mounts an engine (2). The rear end of the vehicle body frame (3) is continuously connected to the mission case (4), and the front wheel (6) for traveling the paddy field is supported in front of the mission case (4) through the axle case (5). (4) A transmission case (7) is connected to both sides of the rear portion of the rear portion, and a rear wheel (8) for traveling a paddy field is supported at the rear end portion of the transmission case (7). Then, on both sides of the hood (9) covering the engine (2), etc.
0) is mounted and the mission case (4) is formed by the body cover (12) forming the step (11).
Etc. and cover the driver's seat (1
3) is attached, and a steering handle (14) is provided at the rear of the hood (9) in front of the driver's seat (13).

Further, (15) in the figure is a planting section comprising a seedling table (16) for planting 6 rows, a plurality of planting claws (17), etc. Forward tilting seedling stand (1
6) is supported by the planting case (20) via the lower rail (18) and the guide rail (19) so as to be slidable left and right, and at the same time, the rotary case (21) is rotated at a constant speed in one direction. The nail case (22) (22), which is a pair of planting arms, is disposed in a symmetrical position about the rotation axis of the case (20) and is supported by the case (20). Attach the planting claws (17) (17) to the. A support frame (24) is provided on the front side of the planting case (20) via a rolling fulcrum shaft (23), and a three-point link mechanism (27) including a top link (25) and a lower link (26) is provided. The link frame (27) by connecting a support frame (24) to the rear side of the traveling vehicle (1).
Lifting cylinder (2) that lifts and lowers the planting part (15) via the
8) is connected to the lower link (26) and the front and rear wheels (6) and (8) are driven to move, and at the same time, one seedling is planted from the seedling table (16) that slides back and forth from side to side. The nails (17) are taken out and the seedlings are continuously planted.

Further, in the figure, (29) is a main transmission lever, and (3
(0) is a sub-shift lever for planting up / down and work traveling gear shifting, (3
1) is a planting sensitivity adjusting lever, (32) is a main clutch pedal, (33) and (33) are left and right brake pedals, and (3)
(4) is a center float for leveling two lines, (35) is a side float for leveling two lines, (36) is a side fertilizer applicator, and (3)
7) is a chemical spraying machine.

Further, as shown in FIGS. 4, 5 and 6, a gear case (39) through which the steering shaft (38) of the steering handle (14) is inserted is provided on the rear side of the engine (2), and the input / output is performed. Pulleys (40) (41) and belts (42)
Equipped with a continuously variable transmission mechanism (43) having an engine (2)
To the output shaft (44) of the gear case (39)
5) is connected via the continuously variable transmission mechanism (43), and the transmission case (4) is connected to the gear case (39) via the output shaft (46), and the front-rear traveling drive shafts (47) (48) are connected. ) Is connected to each of the cases (5) and (7) via the transmission case (4), and the planted drive shaft (4)
9) via the mission case (4) to the planted case (2)
0) is connected, and the input pulley (41) and the input shaft (4) are connected via the main clutch (50) which is intermittently operated by the main clutch pedal (32) and the reduction gear (51).
5) and the output shaft (46) are connected to each other, and the continuously variable transmission mechanism (4
3) and the gear case (39), the output of the engine (2) is decelerated and transmitted to the mission case (4), and
The multistage shift output by the main shift lever (29) of the mission case (4) is transmitted to the front and rear wheels (6) (8) and the planting part (15).
It is configured to be transmitted to.

Further, input / output cams (54) (5) connected to the tension roller (52) by a rod (53).
5) and input / output rollers (56) (57) that are brought into contact with the respective cams (54) (55), and output rollers (5
The mounting plate (58) provided with 6) is fixed to the side surface of the engine (2), and the mounting plate (59) provided with the input roller (57) is attached to the support frame (60) of the vehicle body frame (3).
Fixed to the actuator, the variable speed motor (61)
The input cam (55) is connected to the screw shaft (62) and the forward and reverse control of the motor (61) attached to the vehicle body frame (3) is performed via the rod (53) to output and input cams (54) (55). ) Is rotated and the input / output pulley (40) is rotated.
(41) The width is changed to change the winding diameter of the belt (42), and the gear ratios of the pulleys (40) (41) and the belt (42) are continuously changed.

Further, as shown in FIGS. 1, 7 and 8, the main clutch switch (63) is turned on when the main clutch (50) is disengaged, and the bonnet (9) is attached to an operation panel at the rear of the vehicle for traveling. A speed increase switch (64) for increasing the speed to a predetermined speed, a roadside travel switch (65) for detecting roadside switching of the main speed change lever (29), and a speed change for detecting the shift position of the auxiliary speed change lever (30). A feedback potentiometer (67) which is a feedback sensor for detecting the amount of displacement of the input / output cams (54) (55) by the potentiometer (66) and the speed change motor (61).
And a regulator (68) for connecting the generator of the engine (2) to the battery, a travel speed change control circuit (69) including a microcomputer, and switches (63) (64) (65), Each potentiometer (66) (67) and regulator (68) are connected to the control circuit (69).

Further, the speed-up and speed-down circuit (70) (71)
The transmission motor (61) is connected to the control circuit (69) via the switch, and the manual switch (72) is connected to each of the circuits (70) (71) to operate the auxiliary transmission lever (30) or the manual switch ( 72) The forward / reverse rotation of the speed change motor (61) is performed by the operation to control the speed change of the continuously variable speed change mechanism (43). In the mobile agricultural machine which is changed to the stage, the regulator (68) which is a sensor for detecting the stop of the engine (2) is provided, and it becomes approximately 0 volt when the engine (2) is operating and approximately 12 volt when the engine (2) is stopped. By utilizing the voltage change of the regulator (68), the 12-volt voltage of the regulator (68) is detected when the engine (2) is stopped, and the stop of the engine (2) is detected to change the speed. When the battery (61) is stopped and maintained to prevent the pulleys (40) (41) and the belt (42) from being damaged, and the battery charging circuit fails even when the engine (2) is operating. In the same manner as described above, since the 12 volt voltage of the regulator (68) is detected, the shift motor (61) is kept stopped, and the battery is discharged by the operation of the shift motor (61) which consumes a large amount of power. It is configured so that it can be prevented in advance, the failure of the charging circuit can be detected, and the over-discharge of the battery can be prevented.

This embodiment is constructed as described above, and is shown in FIG.
As shown in FIG. 8, switching between road running (high speed forward), work running with planting (low speed forward), seedling joint (temporary stop), and reverse is performed by operating the main shift lever (29), and as shown in FIG. , Up and down of the planting part (15) (disengagement of the planting clutch), movement of the left and right markers to the operating position and engagement of the planting clutch, low-speed to high-speed (forward) continuously variable sub-shifts, the sub-shift lever (30 ) Do by operation.

Further, as shown in the flow chart of FIG. 10, the main clutch (50) is turned off at a headland and the main clutch switch (63) provided in series with the starter motor and acting as a safety switch is turned on. When the speed increasing switch (64) is off, the speed change motor (61) is automatically decelerated to a predetermined low speed and maintained at the predetermined low speed, while when the speed increasing switch (64) is on. The speed change motor (61) is decelerated to a position higher than the predetermined low speed in the OFF state by a certain width to maintain the speed at a constant higher speed than the predetermined low speed.

When the main clutch (50) is on and the main clutch switch (63) is off, the road drive switch (6)
5) or when the speed increasing switch (64) is turned on, the speed change motor (61) is automatically speeded up to a predetermined speed,
Maintain at a predetermined speed.

Further, each of the switches (63) (64)
When (65) is off, the inputs of the potentiometers (66) and (67) for gear shift and feedback are compared, and the gear shift motor (61) is operated by changing the gear shift position of the auxiliary gear shift lever (30) in the planting work state. , Continuously variable transmission (4
3) is controlled to continuously change the planted traveling speed. When the auxiliary gearshift lever (30) is operated at a high speed side to increase the speed, the speed change motor (6
On the other hand, when deceleration is performed by operating the lever (30) on the low speed side, the speed change motor (61) is operated at high speed by continuous drive to perform the deceleration operation while activating 1).

Also, when the speed change motor (61) is performing an acceleration / deceleration operation, the motor (61) is stopped while the speed-up or deceleration control signal is being output, and the value of the feedback potentiometer (67) is reduced. Is approximately constant, the potentiometer (67) value is set to the motor (6
It is stored as the maximum or minimum limit position in 1) and used as a limit value for controlling the motor (61) until it is reset by turning off the power, and the motor (61) is operated so that only the reverse operation is performed. In addition, at the time of factory shipment adjustment, the speed change lever (30) and each potentiometer (66) (67) are operated by full stroke, and the maximum and minimum voltages of each potentiometer (66) (67) at this time are read, It is also easy to correct the minimum shift position and parts and mounting errors.

Further, when the speed change motor (61) is performing an acceleration / deceleration operation, the voltage change of the regulator (68) becomes 0 V when the engine (2) is operating and 12 V when the engine (2) is stopped. Of the sub-transmission operation such as the operation of the manual switch (72) by stopping the traveling speed change control of the speed change motor (61) by stopping the engine (2) detected by the 12-volt constant voltage of the regulator (68). When the switch (63) (64) (65) is off and the shift potentiometer (66) is operated by the auxiliary shift lever (30) while the engine (2) is operating, the shift is enabled. The continuously variable transmission mechanism (43) is controlled by the motor (61), and the planted traveling speed is changed.

Further, FIG. 10 shows a modification of the above-mentioned FIG. 8, in which the operating arm of the shift potentiometer (66) directly contacts the lever (30) at the sub-shift position of the sub-shift lever (30). Although they were in contact with each other and linked, Figure 1
1, the one end side of the slide plate (73) is connected to the lever (30), and the pin (75) of the operation arm (74) of the transmission potentiometer (66) is connected to the slide plate (73).
Of the arm (74) which is inserted into the long hole (76) of the armature and is supported at a predetermined position by the spring (77) and the stopper (78) through the slide plate (73) by the shift operation of the lever (30). Can also be done. The stopper (7
8) is omitted, the entire operation of the lever (30) and the arm (7
4) can be interlocked and the output of the potentiometer (66) only in the shift range of the lever (30) can be used.

[0019]

As is apparent from the above embodiments, the present invention is provided with an actuator (61) for operating the continuously variable transmission mechanism (43), and the travel speed is continuously changed by controlling the actuator (61). The agricultural machine is provided with a sensor (68) for detecting the stop of the engine (2), and the actuator (61) is stopped and maintained by the sensor (68) when the engine (2) is stopped. The actuator (6
Since the operation of 1) is blocked, it is possible to prevent an unreasonable operating force from being applied to the continuously variable transmission mechanism (43), and the shift position is maintained, so that the traveling speed can be facilitated when the engine (2) is restarted. It is possible to make corrections and easily improve safety and handling operability.

[Brief description of drawings]

FIG. 1 is a travel shift control circuit diagram.

FIG. 2 is a side view of a passenger rice transplanter.

FIG. 3 is a plan view of the same.

FIG. 4 is a plan view of a traveling drive unit.

FIG. 5 is a side view of the continuously variable transmission mechanism.

FIG. 6 is a plan view of the same.

FIG. 7 is a plan view of a main shift lever portion.

FIG. 8 is a plan view of an auxiliary shift lever portion.

FIG. 9 is a flowchart of FIG.

FIG. 10 is a side view of an auxiliary shift lever portion.

[Explanation of symbols]

 (2) Engine (43) Continuously variable transmission mechanism (61) Transmission motor (actuator) (68) Regulator (sensor)

Claims (1)

[Claims] 1. A mobile agricultural machine provided with an actuator for operating a continuously variable transmission mechanism, which continuously changes the traveling speed by controlling the actuator, is provided with a sensor for detecting engine stop, and the actuator is operated by the sensor when the engine is stopped. A mobile agricultural machine characterized by being configured to be stopped and maintained.