JP2934996B2 - Rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter having, for example, a seedling mounting table and planting claws for continuously performing seedling planting operations.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 3-249777, there has been a technique in which a transmission member operates a continuously variable transmission mechanism to change the transmission speed of a belt.

[0003]

In the prior art, the shift potentiometer output characteristic of the shift lever is set to the B characteristic in which the shift amount of the shift lever and the change in running speed are constant. Since the rate of change of the traveling speed is smaller than the rate of change of the speed, it is easy to cause a difference between the shift lever operation sensitivity and the actual travel speed change, and it is necessary to make the shift lever operation feeling different between the low speed range and the high speed range. There were some handling problems. Therefore, Japanese Patent Application Laid-Open No. 2-31
080 and JP-A-3-204440.
As a result, driving characteristics that match the driver's feeling
Technology, but with the control of the continuously variable transmission,
Engine throttle control, so the engine speed and
It is necessary to detect the accelerator operation amount, etc.
Easy control structure and reduced manufacturing cost
And at the same time have good driving characteristics.
To set the engine output change characteristic curve
Therefore, there is almost no change in engine output.
Easy planting with good feeling driving characteristics
There are functional problems such as not being obtained .

[0004]

Means for Solving the Problems] However, the present invention is, planting
Engine output of a rice transplanter
Sensor that detects whether the main clutch is engaged or disengaged
And a main transmission lever that switches the speed between road running and planting running
Road sensor that detects the road operation of
Speed change operation of the sub-shift lever that changes the
Speed sensor based on the detection result of the speed change sensor
Provide a continuously variable transmission mechanism and a speed change member for changing the
When the main shift lever is operated on the road except when the
When the planting section is not at the
Shift operation amount of sub-shift lever and planting work of continuously variable transmission mechanism
While maintaining the running speed change rate substantially constant, detection of the shift sensor
Based on the results, the transmission is automatically controlled and the main
The gear shift is set by the
Automatically moves the continuously variable transmission to a constant gear position regardless of the sensor
It is configured to switch, and it is possible to change
The speed lever operation, easily obtained running speed that matches the speed change operation feeling at all speed ranges, it is not necessary to differentiate the sub shift lever operation feeling in the conventional low speed range and high speed range as the sub shift lever Improving operability and planting conditions in the field
If running speed control suitable for work conditions can be easily performed
In both cases, the continuously variable transmission automatically lowers speed when the main clutch is disengaged.
Easy switching to prevent sudden start due to main clutch engagement
Possible, and continuously variable by switching the main transmission lever on the road
Running performance under light load by automatically switching the transmission mechanism to high speed
Can easily be improved and the running speed control function can be improved.
And can simplify the handling operation easily.
You .

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a circuit diagram of a traveling speed change control circuit, FIG. 2 is a side view of a riding rice transplanter, and FIG. 3 is a plan view of the same, wherein (1) is a traveling vehicle on which an operator rides, and is equipped with an engine (2). The rear end of the vehicle body frame (3) is connected to a transmission case (4), and a front paddle traveling wheel (6) is supported in front of the transmission case (4) via an axle case (5). (4) A transmission case (7) is continuously provided on both sides of the rear part, and a rear wheel (8) for traveling in paddy fields is supported at the rear end of the transmission case (7). A spare seedling table (1) is provided on both sides of the hood (9) covering the engine (2) and the like.
0), and the transmission case (4) is formed by a body cover (12) forming a step (11).
And a driver's seat (1) above the vehicle body cover (12).
3) is mounted, and a steering handle (14) is provided in front of the driver's seat (13) and behind the hood (9).

[0006] In the figure, reference numeral (15) denotes a planting portion provided with a seedling mounting table (16) for six-row planting and a plurality of planting claws (17). Forward tilting seedling platform (1
6) is supported on a planting case (20) via a lower rail (18) and a guide rail (19) so as to be reciprocally slidable right and left, and a rotary case (21) is rotated at a constant speed in one direction. The case (20) is supported, and a pair of claw cases (22) and (22), which are a pair of planting arms, are disposed at symmetrical positions about the rotation axis of the case (21). Attach the planting claws (17) and (17) to them. A supporting 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 support frame (24) is connected to the rear side of the traveling vehicle (1) by the link mechanism (27).
Cylinder (2) for raising and lowering the planting section (15) through the
8) is connected to a lower link (26), and the front and rear wheels (6) and (8) are driven and moved, and at the same time, seedlings for one strain are planted from a seedling mounting table (16) which is reciprocally slid left and right. It is configured to take out with a nail (17) and continuously perform seedling planting work.

[0007] In the figure, (29) is the main shift lever, (3)
0) is a sub-shift lever for planting elevating and working travel shifting, and (3)
1) is a planting sensitivity adjusting lever, (32) is a main clutch pedal, (33) and (33) are left and right brake pedals, (3)
4) is a two-floor leveling center float, (35) is a two-floor side float, (36) is a side fertilizer, (3)
7) is a medicine 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). Pulley (40) (41) and belt (42)
An engine (2) comprising a continuously variable transmission mechanism (43) having
The input shaft (4) of the gear case (39) is connected to the output shaft (44) of the
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). ), The respective cases (5) and (7) are connected to the transmission case (4) via the planting drive shaft (4).
9) and the planting case (2) in the mission case (4).
0), and the input pulley (41) and the input shaft (4) are connected via a main clutch (50) operated by a main clutch pedal (32) and a reduction gear (51).
5) and the output shaft (46), and the continuously variable transmission mechanism (4).
3) and the transmission of the engine (2) via the gear case (39) to the transmission case (4) at a reduced speed.
The multi-speed transmission output from the main transmission lever (29) of the transmission case (4) is transmitted to the front and rear wheels (6) and (8) and the planting section (15).
It is configured to be transmitted to.

The input / output cams (54) (5) connected to the tension roller (52) by a rod (53).
5), and input / output rollers (56) (57) to be brought into contact with the respective cams (54) (55).
The mounting plate (58) provided with 6) is fixed to the side of the engine (2), and the mounting plate (59) provided with the input roller (57) is connected to the support frame (60) of the vehicle body frame (3).
And the actuator is a speed change motor (61)
The input cam (55) is connected to the screw shaft (62) of the motor, and the input / output cam (54) (55) is connected via the rod (53) by the forward / reverse control of the motor (61) mounted on the vehicle body frame (3). ) To rotate the input / output pulley (40)
(41) The winding diameter of the belt (42) is changed by changing the width, and the speed ratio of the pulleys (40) (41) and the belt (42) is changed steplessly.

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

Further, the speed increasing and reducing circuits (70) and (71)
And a manual switch (72) connected to each of the circuits (70) and (71) to operate the sub-transmission lever (30) or to operate the manual switch ( 72) The speed change motor (61) is rotated forward and reverse by operation to control the speed change of the continuously variable transmission mechanism (43). As shown in FIG.
0), the potentiometer (66) is formed so that the output of the shift potentiometer (66) becomes an A-characteristic curve (solid line) with respect to the operation amount (stroke) of the sub-shift lever (3).
0) and the control signal of the shift motor (61) of the shift potentiometer (66) has an output characteristic for keeping the rate of change of the operation amount of (0) and the traveling speed of the continuously variable transmission mechanism (43) substantially constant. The operation amount of the lever (30) and the rate of change of the traveling speed are kept substantially constant in the entire sub-shift traveling speed range, and the transmission motor (6) of the transmission potentiometer (66) as shown in FIG.
1) A stepless speed change sensitivity setting device, which is a preset member for initially setting the characteristics of the control signal, is provided, and the output characteristics (such as the constant of the B characteristics) of the speed change potentiometer (66) are initially set by the setting device. The operation sensitivity of the sub-transmission lever (30) is selected in accordance with the conditions or the skill of the operator.

As is clear from the above, the planting portion (15)
In a rice transplanter that mounts a vehicle on a traveling vehicle (1)
(2) Main clutch (50) that cuts off output is detected
Main clutch switch (63) as a clutch sensor
And a main transmission lever that switches the speed between road running and planting running
A road running sensor that detects the road running operation of (29)
Changed a certain road running switch (65) and planting work speed
To detect a shift operation of the auxiliary shift lever (30) to be shifted.
A shift potentiometer (66) as a speed sensor;
Travel speed based on the detection result of potentiometer (66)
Continuously variable transmission mechanism (43) for changing the speed and a speed change member
Speed motor (61) is provided and the main clutch (50) is disengaged.
When the vehicle is outside, the main shift lever (29) is in the road operation position.
Otherwise, after lowering the planting part (15) to the working position
Shift operation amount of the auxiliary transmission lever (30) to be performed and the continuously variable transmission
While maintaining a substantially constant rate of change in the planting work traveling speed of the structure (43).
Based on the detection result of the shift potentiometer (66)
The automatic control of the speed change motor (61) and the main clutch
(50) Off-road operation of the off or main transmission lever (29)
Continuously variable regardless of the shift potentiometer (66)
The transmission mechanism (43) is automatically switched to a constant transmission position.
Then, the operation of the auxiliary transmission lever (30) in the planting operation state is started.
As a result, it is possible to easily obtain a traveling speed that matches the shift operation feeling in all speed ranges, and it is necessary to make the operation feeling of the sub- variable lever (30) different between the low speed range and the high speed range as in the related art. And the improvement of the operability of the auxiliary shift lever (30) and planting conditions such as field conditions.
Easy to control running speed etc. suitable for working conditions
At the same time, when the main clutch (50) is disengaged, the continuously variable transmission mechanism (4
3) Automatically switch to low speed and turn on the main clutch (50)
The main shift lever (2
The continuously variable transmission mechanism (43) is automatically switched by the on-road traveling switching of 9).
Dynamically switching to high speed to improve running performance under light load
To improve the speed change control function and simplify handling operations
It is configured so that

This embodiment is configured as described above, and FIG.
As shown in FIG. 8, switching between road running (high-speed forward), planting running (low-speed forward), seedling succession (temporary stop), and reverse running as work runs is performed by operating the main transmission lever (29), and as shown in FIG. The up-down and up-down of the planting portion (planting clutch disengagement), the movement of the action position of the left and right markers and the operation of engaging the planting clutch, low-speed to high-speed (forward) continuously variable sub-transmission, ) Operation.

As shown in the flowchart of FIG. 10, the main clutch (50) is turned off at a headland or the like, 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-up switch (64) is off, the speed change motor (61) is automatically decelerated to a predetermined low speed to maintain the predetermined low speed, and when the speed-up switch (64) is on, The speed change motor (61) is decelerated to a position at a high speed side by a certain width from the predetermined low speed in the off state, and is maintained at a speed higher than the predetermined low speed by a certain speed.

When the main clutch (50) is turned on and the main clutch switch (63) is off, the on-road drive switch (6) is turned on.
5) When the speed increase switch (64) is turned on, the speed change motor (61) is automatically increased in speed to a predetermined speed,
Maintain at a predetermined speed.

Further, each of the switches (63) and (64)
When (65) is off, the input of each of the shift and feedback potentiometers (66) and (67) is compared, and the shift motor (61) is operated by changing the shift position of the auxiliary shift lever (30) in the planting operation state. , Continuously variable transmission mechanism (4
3) is controlled to change the planting traveling speed steplessly. When the speed is increased by operating the auxiliary transmission lever (30) on the high-speed side, the transmission motor (6) has a large operating force by pulse driving.
When 1) is operated to increase the speed, and the speed is reduced by operating the lever (30) at a lower speed, the speed change motor (61) is operated at a higher speed by continuous driving to perform the deceleration operation.

Further, when the speed increasing or decelerating operation is performed by the speed change motor (61), the motor (61) stops while the speed increasing or deceleration control signal is being output, and the value of the feedback potentiometer (67) is increased. Is substantially constant, the value of the potentiometer (67) is changed to the value of the motor (6).
The motor (61) is operated so as to store only the maximum or minimum limit position of 1) and to use it as a limit value for controlling the motor (61) until reset by turning off the power, and to perform only the operation in the reverse direction.

When the speed change motor (61) is performing the acceleration / deceleration operation, the voltage change of the regulator (68) becomes 0 volt when the engine (2) is operated and becomes 12 volt when the engine (2) is stopped. With the stop of the engine (2) detected by the 12-volt constant voltage of the regulator (68), the traveling shift control of the transmission motor (61) is stopped, and all the sub-shift operations such as the operation of the manual switch (72) are disabled. When the switches (63), (64), and (65) are off, the engine (2) is running, and the shift potentiometer (66) is operated by the auxiliary shift lever (30), the shift is changed. The continuously variable transmission mechanism (43) is controlled by the motor (61) to change the planting traveling speed.

FIG. 11 shows a modification of FIG. 8. In FIG. 8, the operating arm of the shift potentiometer (66) directly contacts the lever (30) at the sub-shift position of the sub-shift lever (30). It was in contact with and linked, but Figure 1
As shown in FIG. 1, one end of the slide plate (73) is connected to the lever (30), and the pin (75) of the operation arm (74) of the shift potentiometer (66) is connected to the slide plate (73).
The arm (74), which is inserted through the long hole (76) and supported at a predetermined position by the spring (77) and the stopper (78), is operated via the slide plate (73) by the shifting operation of the lever (30). Can also be done. The stopper (7
8) is omitted, and the overall operation of the lever (30) and the arm (7)
4), the output of the potentiometer (66) only in the shift range of the lever (30) can be used.

[0020]

As is apparent from the above embodiments, the present invention provides a rice transplanter in which a planting section (15) is mounted on a traveling vehicle (1).
The main clutch that disconnects the engine (2) output
(50) a clutch sensor (63) for detecting engagement / disengagement;
The main transmission lever (2) that switches the speed between road running and planting running
The road travel sensor (6) for detecting the road travel operation of 9)
5) and an auxiliary transmission lever (3
0) a shift sensor (66) for detecting the shift operation;
The traveling speed is changed based on the detection result of the speed sensor (66).
A continuously variable transmission mechanism (43) and a transmission member (61),
When the main clutch (50) is not engaged,
When (29) is other than the road operation position, the planting section (1
5) The sub-transmission lever (3
0) Shifting operation amount and planting work of continuously variable transmission mechanism (43)
The shift sensor (66) while maintaining the line speed change rate substantially constant.
Automatically controlling the transmission member (61) based on the detection result of
In both cases, the main clutch (50) disengagement or the main shift lever (2
9) Related to shift sensor (66) by road operation
The continuously variable transmission mechanism (43) is automatically switched to a constant transmission position
It is designed to change the sub-shift under planting work condition
By operating the lever (30), it is possible to easily obtain a traveling speed that matches the shift operation feeling in all speed ranges, and it is necessary to make the operation feeling of the sub- shift lever (30) different between the low speed range and the high speed range as in the related art. And improved operability of the auxiliary transmission lever (30)
Speed control suitable for planting work conditions such as field conditions and field conditions
Can be easily performed, and the main clutch (5
0) Automatically switches the continuously variable transmission (43) to low speed when off
To prevent sudden start due to the main clutch (50)
It can be easily performed, and on the road of the main shift lever (29).
Automatically speeds up the continuously variable transmission mechanism (43) by running switching
To easily improve running performance under light load
Can improve the running speed control function and handle operation
Can be easily simplified .

[Brief description of the drawings]

FIG. 1 is a diagram of a traveling speed change control circuit.

FIG. 2 is a side view of the riding 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 a continuously variable transmission mechanism.

FIG. 6 is a plan view of the same.

FIG. 7 is a plan view of a main transmission lever.

FIG. 8 is a plan view of a sub-transmission lever portion.

FIG. 9 is an output diagram of a shift potentiometer.

FIG. 10 is a flowchart of FIG. 1;

FIG. 11 is a side view of the auxiliary transmission lever.

[Description of Signs ] (1) Traveling vehicle (2) Engine (15) Planting part (29) Main transmission lever (30) Sub transmission lever (43) Continuously variable transmission mechanism (50) Main clutch (61) Transmission motor ( Actuator) (63) Main clutch switch (clutch sensor) (65) Road running switch (road running sensor) (66) Shift potentiometer (shift sensor)

Claims (1)

(57) [Claims] The planting section (15) is mounted on a traveling vehicle (1).
Main engine to cut off engine (2) output
Clutch sensor (6) for detecting engagement / disengagement of clutch (50)
3) and the main speed changer for switching the speed between road running and planting running.
A road running sensor for detecting a road running operation of the bar (29).
(65) and an auxiliary transmission lever for changing the planting work speed
A shift sensor (66) for detecting the shift operation of (30)
And the traveling speed based on the detection result of the shift sensor (66).
The continuously variable transmission mechanism (43) and the transmission member (61) to be changed
The main gear (50), except for the main clutch (50) disengagement operation.
When the lever (29) is at a position other than the road running operation position,
(15) Sub-shift lever performed after lowering to the working position
Shift operation amount of (30) and planting operation of continuously variable transmission mechanism (43)
While maintaining the running speed change rate substantially constant, the speed change sensor (6
The transmission member (61) is automatically controlled based on the detection result of (6).
With the main clutch (50) disengaged or the main shift lever
The shift sensor (66) is operated by the on-road driving operation of (29).
Automatically sets the continuously variable transmission mechanism (43) to a constant transmission position regardless of
A rice transplanter characterized by being configured to be switched to.