JPH05338477A - Mobile agricultural machine - Google Patents

Abstract

PURPOSE:To increase the speed of farm working and to improve the efficiency and safety thereof by performing the actuator speed decreasing operation of a main clutch switch prior to the speed increasing operation of the speed increasing switch of a continuously variable transmission mechanism. CONSTITUTION:A main clutch switch 63 turned on by the off operation of a main clutch, a speed increasing switch 64 for increasing the running speed to a designated speed, a speed change potentiometer 66 for detecting the speed change position of an auxiliary speed change lever, and a feedback potentiometer 67 are connected to a running speed change control circuit 69. The output of the circuit is used to drive a speed change motor 61 for changing the speed of a continuously variable transmission mechanism by means of speed increasing and decreasing circuits 71, 71 through a manual switch 72. In this arrangement, the running speed change control device 69 has the speed decreasing operation of the speed change motor 61 of the main clutch switch 63 carried out prior to the speed increasing operation of the speed increasing switch 67. Accordingly, farm work by reciprocating running can be executed at an uniform designated high speed with good efficiency so as to increase the speed of farm work and improve the safety thereof.

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 Laid-Open No. 3-56760, an actuator operates a continuously variable transmission mechanism to change the transmission speed of a belt, and a main clutch is disengaged to turn on a main clutch switch. There was a technology to automatically decelerate to a predetermined low speed.

[0003]

In the prior art described above, since the speed-increasing operation of the actuator is only performed by the operation of the shift lever, the paddy field is used in the rice planting work in which straight traveling at a predetermined high speed is repeated by reciprocation. It is necessary to move the gear shift lever between the predetermined high speed position and the low speed at the beginning and end of the reciprocating path, such as changing the direction of, and the operation of returning to the predetermined high speed is troublesome, and the speed during straight running becomes uneven. There was a problem in driving operation such as easy.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, 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, the actuator is set to a predetermined position by disengaging the main clutch. A main clutch switch that automatically decelerates to a low speed and a speed increasing switch that speeds up the actuator to a predetermined high speed are provided, and the actuator decelerating operation of the main clutch switch has priority over the speed increasing operation of the speed increasing switch. Since the vehicle can be driven at a predetermined high speed only by operating the speed increasing switch, the agricultural work performed by reciprocating can be efficiently performed at a substantially uniform predetermined high speed, simplifying the gear shifting operation and operating the operation. It is possible to easily improve the driving performance, and to reduce the speed when the main clutch is disengaged as opposed to increasing the speed of the speed increasing switch. Since priority is given are those obtained aim to facilitate and improve the speed and safety of agricultural work.

[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 speed change motor (61) is normally and reversely operated to control the speed change of the continuously variable speed change mechanism (43), and the variable speed motor (61) for operating the continuously variable speed change mechanism (43) is provided. 61) In a mobile agricultural machine in which the traveling speed is continuously changed by control, a main clutch switch (6) that automatically decelerates the motor (61) to a predetermined low speed by turning off the main clutch (50).
3), a road traveling switch (65) and a speed increasing switch (6) for speeding up the motor (61) to a predetermined high speed.
4) is provided to give priority to the deceleration operation of the motor (61) of the main clutch switch (63) to the acceleration operation of the speed increase switch (64), and the switches (63) (6)
4) When the (65) are all off, the speed change motor (61) is operated so that the outputs of the potentiometers (66) and (67) are matched.

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. At this time, even if the speed increasing switch (64) is on, the main clutch switch (6
The deceleration operation of 3) is preferentially performed, the deceleration motor (61) is automatically decelerated to a predetermined low speed, and maintained at the predetermined low speed. When the speed increasing switch (64) is on, the speed change motor (61) is decelerated to a position higher than the predetermined low speed when the switch (64) is in the off state by a certain width, and the speed is lower than the predetermined low speed. It is also possible to maintain a constant high 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). In an agricultural machine, a main clutch switch (63) that automatically decelerates the actuator (61) to a predetermined low speed by disengaging the main clutch (50), and an increase speed that accelerates the actuator (61) to a predetermined high speed. A switch (64) is provided,
The deceleration operation of the actuator (61) of the main clutch switch (63) is prioritized over the acceleration operation of the speed increase switch (64). Only by operating the speed increase switch (64), a predetermined high speed can be obtained. Since the vehicle can travel, it is possible to efficiently perform the agricultural work performed by reciprocating at a substantially uniform predetermined high speed, simplify the shift operation and improve the driving operability, and at the same time, increase the speed increase switch ( 6
Since the deceleration operation when the main clutch (50) is disengaged is prioritized over the speed-up operation of 4), it is possible to easily speed up agricultural work and improve safety.

[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]

 (43) Continuously variable transmission mechanism (50) Main clutch (61) Transmission motor (actuator) (63) Main clutch switch (64) Speed increasing switch

Claims (1)

[Claims] 1. In a mobile agricultural machine provided with an actuator for operating a continuously variable transmission mechanism and continuously changing the traveling speed by controlling the actuator, a main clutch is automatically decelerated to a predetermined low speed by a main clutch disengagement. A clutch switch and a speed increasing switch for speeding up the actuator to a predetermined high speed are provided, and the actuator decelerating operation of the main clutch switch is preferentially performed with respect to the speed increasing operation of the speed increasing switch. And mobile farm machinery.