WO2012036280A1 - 田植機 - Google Patents
田植機 Download PDFInfo
- Publication number
- WO2012036280A1 WO2012036280A1 PCT/JP2011/071247 JP2011071247W WO2012036280A1 WO 2012036280 A1 WO2012036280 A1 WO 2012036280A1 JP 2011071247 W JP2011071247 W JP 2011071247W WO 2012036280 A1 WO2012036280 A1 WO 2012036280A1
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- WO
- WIPO (PCT)
- Prior art keywords
- shift
- engine
- speed
- actuator
- rotation angle
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0215—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission
- F02D41/0225—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the gear ratio or shift lever position
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B67/00—Devices for controlling the tractor motor by resistance of tools
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C11/00—Transplanting machines
- A01C11/003—Transplanting machines for aquatic plants; for planting underwater, e.g. rice
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C11/00—Transplanting machines
- A01C11/02—Transplanting machines for seedlings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/0205—Circuit arrangements for generating control signals using an auxiliary engine speed control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/08—Introducing corrections for particular operating conditions for idling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/08—Introducing corrections for particular operating conditions for idling
- F02D41/083—Introducing corrections for particular operating conditions for idling taking into account engine load variation, e.g. air-conditionning
Definitions
- the present invention relates to rice transplanter technology.
- Patent Document 1 a technique for changing the engine speed using a lever, a pedal, or the like has been publicly known (for example, Patent Document 1).
- a rice transplanter that performs a continuously variable transmission by operating a shift pedal, when the shift pedal is not depressed, it is in a running stop state (idling state), and the engine speed is rotating at an idling speed.
- the idling rotational speed at the time of work is set to a rotational speed at which the rice transplanter can start smoothly when the shift pedal is depressed to start the rice transplanter.
- Patent Document 2 a technique for accelerating and decelerating by operating a shift operation tool (shift pedal) is known (for example, Patent Document 2).
- General rice transplanters have an actuator for changing the vehicle speed (acceleration / deceleration control).
- the rice transplanter calculates the target drive amount of the actuator based on the depression amount of the shift pedal when the shift pedal is depressed, and drives the actuator so that the drive amount of the actuator becomes the target drive amount. Then, acceleration / deceleration is performed by changing the vehicle speed to a size corresponding to the target drive amount of the actuator.
- the general rice transplanter always increases or decreases the drive amount of the actuator to a constant value when the shift pedal is depressed. That is, the general rice transplanter is configured such that the ratio of the change in the target drive amount of the actuator to the change in the depression amount of the shift pedal is always a constant value (the same value). As a result, when the operator accelerates or decelerates the rice transplanter by depressing the shift pedal, fine acceleration / deceleration control cannot be performed, which is disadvantageous in that the shift feeling is lowered.
- the rice transplanter according to claim 1 is: Engine, A transmission for shifting the power of the engine and transmitting it to the wheels;
- the transmission is connected to the transmission and can be operated to a plurality of transmission positions including a seeding position.
- the transmission speed of the transmission is changed to correspond to the operated transmission position.
- a main shift lever to An actuator for changing the rotational speed of the engine A shift operation tool for operating the actuator; With Driving the actuator so that the engine rotates at a first idling speed when the main speed change lever is not in the seeding position and the speed change tool is not operated; When the main transmission lever is in the seeding position, the actuator is driven so that the engine rotates at a second idling speed that is lower than the first idling speed.
- the first idling rotational speed is a rotational speed that can be immediately applied when starting the rice transplanter
- the second idling rotational speed is a rotational speed at which the engine does not stop.
- the rice transplanter is an operation tool for starting the engine, and includes a starter that outputs a start signal when a start operation for starting the engine is performed, When the output of the start signal by the starter is started when the main shift lever is in the seeding position and the shift operation tool is not operated, the engine rotates the first idling.
- Drive the actuator to rotate by a number In the state where the main transmission lever is in the seedling joint position, the start device starts outputting the start signal, and then the main transmission lever is operated to the shift position different from the seedling position, and then When the main transmission lever is operated to the seeding position, the actuator is driven so that the engine rotates at the second idling speed.
- a target drive amount of the actuator is calculated based on an operation amount of the speed change operation tool, the actuator is driven so as to become the target drive amount, and a vehicle speed is set to a magnitude corresponding to the target drive amount of the actuator.
- change Dividing the operating range of the shift operating tool into a plurality of shift areas; For each of the plurality of shift regions, a ratio of a change in the target drive amount of the actuator to a change in the operation amount of the shift operation tool is set.
- Engine An actuator for changing the rotational speed of the engine; A shift operation tool for operating the actuator; With A target drive amount of the actuator is calculated based on an operation amount of the speed change operation tool, the actuator is driven so as to become the target drive amount, and a vehicle speed is set to a magnitude corresponding to the target drive amount of the actuator.
- change Dividing the operating range of the shift operating tool into a plurality of shift areas; For each of the plurality of shift regions, a ratio of a change in the target drive amount of the actuator to a change in the operation amount of the shift operation tool is set.
- the rice transplanter can start smoothly. Further, at the second idling speed, it is possible to suppress the fuel consumption of the engine.
- the engine can be started smoothly, and the engine startability can be improved. Is advantageous.
- acceleration / deceleration can be performed with gradual acceleration corresponding to the depressing amount of the shift pedal, which can contribute to improvement of the shift feeling.
- the rice transplanter can accelerate smoothly.
- acceleration / deceleration can be performed with gradual acceleration corresponding to the depressing amount of the shift pedal, which can contribute to improvement of the shift feeling.
- the rice transplanter can accelerate smoothly.
- FIG. 1 Schematic when the rice transplanter shown in FIG. 1 is viewed from above.
- the figure which shows the dashboard periphery of the rice transplanter shown in FIG. The block diagram which shows the control apparatus of the rice transplanter shown in FIG.
- the rotation angle of the shift pedal, the rotation angle of the detection shaft of the pedal potentiometer, the rotation angle of the motor potentiometer, the rotation speed of the engine when the main transmission lever is operated to the planting position The figure which shows the relationship with the vehicle speed of a rice transplanter.
- the rotation angle of the shift pedal, the rotation angle of the detection shaft of the pedal potentiometer, the rotation angle of the motor potentiometer, and the rotation of the engine when the main transmission lever is operated to the neutral position or the seeding position The figure which shows the relationship between a number and the vehicle speed of a rice transplanter.
- the figure which shows the relationship between a key switch, a seedling joining position detection switch, and the rotation angle (motor position) of the potentiometer for motors (A) The figure which shows a map, (b) The figure which shows the movement range at the time of a motor following in the said map.
- the rice transplanter 1 is an eight-row planter, but this is not particularly limited, and a six-plant or ten-row planter may be used.
- the rice transplanter 1 has a traveling unit 10 and a planting unit 40, so that the planting unit 40 can plant seedlings in the field while traveling by the traveling unit 10. Configured.
- the planting part 40 is arrange
- the engine 14 is provided at the front portion of the vehicle body frame 11 and is covered with a bonnet 15.
- the transmission case 20 is supported by the front portion of the vehicle body frame 11 and is disposed behind the engine 14.
- a hydraulic-mechanical continuously variable transmission (HMT) 21 As shown in FIG. 3, in the transmission case 20, a hydraulic-mechanical continuously variable transmission (HMT) 21, a main transmission mechanism 22, a clutch 21c, and a braking device 21d are mounted.
- HMT hydraulic-mechanical continuously variable transmission
- the HMT 21 is a hydraulic continuously variable transmission (HST) 21a capable of steplessly changing the power from the engine 14, and a planetary gear mechanism capable of combining the power from the engine 14 and the power from the HST 21a. 21b.
- HST hydraulic continuously variable transmission
- the main transmission mechanism 22 can change the power from the HMT 21 in a plurality of stages by changing the combination of gears to mesh with each other.
- the clutch 21c switches whether power can be transmitted from the HMT 21 to the main transmission mechanism 22 by being disconnected or connected.
- the braking device 21d can brake the rotation of the output shaft of the main transmission mechanism 22.
- the front axle case 6 is supported on the front portion of the vehicle body frame 11, and the front wheels 12 are attached to the left and right sides of the front axle case 6.
- the rear axle case 7 is supported on the rear portion of the vehicle body frame 11, and the rear wheels 13 are attached to both the left and right sides of the rear axle case 7.
- the power of the engine 14 is transmitted to the mission case 20, and is transmitted to the left and right front wheels 12 and the left and right rear wheels 13 via the HMT 21 and the main transmission mechanism 22 inside the mission case 20, respectively. 12 and the rear wheel 13 are configured to rotate. Thereby, the traveling unit 10 can travel forward or backward.
- a driving operation unit 60 is provided in the middle of the vehicle body 11 before and after.
- a dashboard 61 is disposed in front of the driving operation unit 60.
- a steering handle 64 is disposed at the center of the left and right of the dashboard 61, and a main transmission lever 65, a key switch 66 (see FIG. 5), and the like are further disposed on the dashboard 61.
- a driver's seat 62 is arranged behind the steering handle 64 at the rear of the driving operation unit 60.
- a shift pedal 67 there are a shift pedal 67, a brake pedal 68 (see FIG. 5), a vehicle body cover 63 having a part for getting on and off, and other levers and switches around the steering handle 64 and the driver seat 62 of the driving operation unit 60. Etc. are arranged. With these operating tools, it is possible to perform appropriate operations on the traveling unit 10 and the planting unit 40. The detailed configuration of the operation tool will be described later.
- the spare seedling stage 17 is attached to each mounting frame 16 erected from both the left and right sides of the front portion of the vehicle body frame 11, and is arranged on both the left and right sides of the bonnet 15. And a reserve seedling is mounted in the reserve seedling mounting stand 17, and the seedling supply to the planting part 40 is attained.
- the planting mission case 50 is supported near the center of the lower part of the planting frame 49, and the transmission shaft 51 is connected to the planting mission case 50. It extends on both the left and right sides.
- the four planting transmission cases 46 are respectively extended rearward from the transmission shaft 51 and arranged at appropriate intervals in the left-right direction.
- a rotary case 44 is rotatably supported on the left and right sides of the rear end of each planting transmission case 46.
- the number of the rotary cases 44 is the same as the number of planting strips, that is, eight in this embodiment. Then, the two planting claws 45 are attached to both sides of the rotary case 44 in the longitudinal direction so as to sandwich the rotation fulcrum of the rotary case 44.
- a seedling stand 41 is disposed above the planting transmission case 46 in a front and rear inclined state, and is attached to the rear portion of the planting frame 49 so as to be reciprocally movable in the left and right directions via upper and lower guide rails (not shown). It is done.
- the seedling table 41 can be reciprocated horizontally by the lateral feed mechanism 52.
- the seedling mounting bases 41 having a plurality of (eight) seedling mat mounting parts are arranged in the left-right direction so that the respective lower ends face one rotary case 44. Then, the seedling mat is placed on each seedling stage 41, and one seedling can be cut from the seedling mat on the seedling stage 41 by the planting claws 45 when the rotary case 44 rotates.
- a seedling vertical feed belt 47 corresponding to the number of strips is provided on the seedling mount 41.
- the seedling vertical feed belt 47 can be operated so that the seedling mat on the seedling stage 41 is vertically fed by the vertical feeding mechanism 53 every time the seedling stage 41 reaches the stroke end of the left and right reciprocating horizontal feed. It is said.
- the motive power of the engine 14 is transmitted to each rotary case 44 via the transmission case 20, the inter-company transmission case 54, the planting transmission case 50, etc., and the rotary case 44 is configured to rotate.
- the two planting claws 45 can alternately take out the seedlings from the seedling mat on the seedling mount 41 and plant them in the field.
- the power of the engine 14 is transmitted to the lateral feed mechanism 52 and the vertical feed mechanism 53 via the transmission case 20, the inter-strain shifting case 54, the planting mission case 50, etc. It is configured such that it is reciprocated horizontally and the seedling mat on the seedling table 41 is vertically fed downward by the vertical feed mechanism 53 via the seedling vertical feed belt 47 in accordance with the left and right reciprocating horizontal feed of the seedling table 41. Is done. Thereby, the seedling mat on the seedling placing table 41 is moved to an appropriate position with respect to the planting claws 45.
- the drawing marker 48 is supported rotatably on the left and right sides of the planting frame 49.
- Each of the left and right line drawing markers 48 is stored by being rotated upward with the base end side as a rotation fulcrum, and the tip side is left or left by being rotated downward from this stored state. It is configured so that it can be drawn to the field by protruding rightward.
- the above-described lifting mechanism 30 is provided between the traveling unit 10 and the planting unit 40.
- the top link 31 and the lower link 32 are installed between the traveling unit 10 and the planting unit 40, and the lifting cylinder is connected between the lower link 32 and the traveling unit 10.
- the planting part 40 can be rotated to the up-down direction with respect to the traveling part 10, that is, can be raised or lowered, by the expansion and contraction operation of the lifting cylinder.
- the power transmission mechanism for transmitting power from the engine 14 to the rotary case 44, the lateral feed mechanism 52, and the vertical feed mechanism 53 includes the planting clutch 55 shown in FIG. Accordingly, the power of the engine 14 is transmitted to the seedling vertical feed belt 47 and the rotary case 44 or is not transmitted.
- the shift pedal 67 shown in FIGS. 2, 5, and 6 is an operating tool for changing the vehicle speed (traveling speed) of the rice transplanter 1, and more specifically, the rotational speed of the engine 14 and the gear ratio of the HMT 21. It is an operation tool for changing.
- the transmission pedal 67 is disposed on the lower right side of the dashboard 61.
- a pedal potentiometer (pedal operation amount detection device) 67a shown in FIG. 6 is for detecting the depression amount (rotation angle) of the shift pedal 67.
- the pedal potentiometer 67a is connected to the shift pedal 67 via a link mechanism, and can detect the amount of depression of the shift pedal 67. More specifically, the detection shaft of the pedal potentiometer 67a is rotated according to the depression amount (rotation angle) of the shift pedal 67, and the rotation angle can be detected as the depression amount of the transmission pedal 67.
- the pedal potentiometer 67a When the shift pedal 67 is depressed, the pedal potentiometer 67a outputs a pedal signal indicating the depression amount of the shift pedal 67.
- the maximum speed setting dial 69 shown in FIGS. 5 and 6 is an operation tool for changing the maximum speed of the rice transplanter 1.
- the maximum speed setting dial 69 is disposed at a substantially central portion of the dashboard 61 (in front of the steering handle 64).
- the main transmission lever 65 shown in FIGS. 2, 5, and 6 is an operating tool for changing the gear position (speed ratio) of the main transmission mechanism 22.
- the main transmission lever 65 is disposed at the left end portion of the dashboard 61 (to the left of the steering handle 64).
- the main transmission lever 65 is connected to the main transmission mechanism 22 in the mission case 20 via a link mechanism.
- the main speed change lever 65 can be changed to a road running position, a planting position, a seeding position, a reverse position or a neutral position.
- the gear position of the main transmission mechanism 22 is changed to high speed. In this case, the rice transplanter 1 can travel at high speed.
- the gear position of the main transmission mechanism 22 is changed to a low speed. In this case, the rice transplanter 1 can travel at a lower speed than when the gear stage of the main transmission mechanism 22 is at a high speed.
- the gear position of the main transmission mechanism 22 is changed to neutral. In this case, the rice transplanter 1 cannot travel. Further, in this case, it is detected that the main transmission lever 65 has been switched to the seeding position by a seeding position detection switch 65a described later, and predetermined control such as changing the number of revolutions of the engine 14 by a control device 100 described later is performed. It can be carried out.
- the seedling joining position detection switch 65a shown in FIG. 6 is for detecting that the main transmission lever 65 is in the seedling joining position.
- a micro switch is used as the seedling joining position detection switch 65a.
- the seedling joining position detection switch 65 a is disposed in the vicinity of the seedling joining position of the main transmission lever 65.
- the seedling joining position detection switch 65a can detect that the main transmission lever 65 is in the seedling joining position by contacting the main transmission lever 65 that has been changed to the seedling joining position.
- the joining position detection switch 65a outputs a joining position signal indicating that the main transmission lever 65 is at the joining position.
- the key switch 66 shown in FIGS. 2, 5, and 6 is an operation tool for starting or stopping the engine 14.
- the key switch 66 is disposed at the right rear end of the dashboard 61 (right rear of the steering handle 64).
- the key switch 66 When the key switch 66 is started (when switched from OFF to ON), the engine 14 is started. At this time, the key switch 66 outputs a start signal indicating that the start operation has been performed.
- the key switch 66 is in the ON state, the engine 14 continues to drive.
- the key switch 66 is stopped (when switched from ON to OFF)
- the engine 14 stops. At this time, the key switch 66 outputs a stop signal indicating that the stop operation has been performed.
- the key switch 66 When the key switch 66 is OFF, the engine 14 continues to stop.
- the speed fixing lever 70 shown in FIGS. 5 and 6 is an operation tool for fixing the vehicle speed of the rice transplanter 1 (maintaining the set vehicle speed) or releasing the fixed speed.
- the speed fixing lever 70 is attached to the shaft of the steering handle 64 and extends toward the right.
- the speed fixing lever 70 can be rotated to a speed fixing position, a speed fixing release position, or a neutral position.
- the speed fixing position is a position when the speed fixing lever 70 is rotated backward.
- the speed fixing release position is a position when the speed fixing lever 70 is rotated forward.
- the neutral position is a position approximately between the speed fixing position and the speed fixing release position. Even when the speed fixing lever 70 is operated to either the speed fixing position or the speed fixing release position, the speed fixing lever 70 is always urged so as to return to the neutral position again.
- the speed fixing switch 70a shown in FIG. 6 is for detecting that the speed fixing lever 70 has been operated to the speed fixing position.
- a micro switch is used as the speed fixing switch 70a.
- the speed fixing switch 70a can detect that the speed fixing lever 70 is operated to the speed fixing position by contacting the speed fixing lever 70 operated to the speed fixing position.
- the speed fixing release switch 70b is for detecting that the speed fixing lever 70 has been operated to the speed fixing release position.
- a micro switch is used as the speed fixing release switch 70b.
- the speed fixing release switch 70b can detect that the speed fixing lever 70 is operated to the speed fixing release position by contacting the speed fixing lever 70 operated to the speed fixing release position.
- the brake pedal 68 shown in FIGS. 3 and 6 is an operation tool for braking the rice transplanter 1.
- the brake pedal 68 is disposed on the lower right side of the dashboard 61 and on the left side of the speed change pedal 67.
- the brake pedal 68 is connected to the braking device 21d through a link mechanism. When the brake pedal 68 is depressed, the braking device 21d is activated, and the rotation of the front wheels 12 and the rear wheels 13 of the rice transplanter 1 is braked.
- the brake operation detection switch 68a shown in FIG. 6 is for detecting that the brake pedal 68 has been operated.
- a micro switch is used as the brake operation detection switch 68a.
- the brake operation detection switch 68a can detect that the brake pedal 68 has been depressed by contacting the brake pedal 68 that has been depressed.
- the seedling end detection switch 49a shown in FIG. 6 detects that the seedling stage 41 has reached a predetermined position (the end position in the left-right direction).
- a micro switch is used as the seedling end detection switch 49a.
- the seedling end detection switch 49a is arranged on the planting frame 49 and can detect that the seedling mounting base 41 has reached a predetermined position by contacting a pressing portion provided on the seedling mounting base 41. it can.
- a motor (actuator) 71 shown in FIG. 6 is an actuator for changing the rotational speed of the engine 14, changing the gear ratio of the HMT 21, switching the connection / disconnection of the clutch 21c, and switching the operation of the braking device 21d.
- the motor 71 is connected to the engine 14, the HMT 21 (specifically, the HST 21a), the clutch 21c, and the braking device 21d through a link mechanism.
- the output shaft of the motor 71 is connected to the speed governor 14a of the engine 14 via a link mechanism.
- the speed control device 14a is driven by the motor 71, and the rotation speed of the engine 14 can be changed.
- the output shaft of the motor 71 is connected to the movable swash plate of the HST 21a through a link mechanism.
- the inclination angle of the movable swash plate is changed by the motor 71, and the gear ratio of the HST 21a can be changed.
- the output shaft of the motor 71 is connected to the clutch 21c through a link mechanism.
- the clutch 71c is disconnected or connected by the motor 71.
- the output shaft of the motor 71 is connected to the braking device 21d through a link mechanism. When the braking device 21d is operated by the motor 71, the power output to the front wheel 12 and the rear wheel 13 can be braked.
- the motor potentiometer 71a is for detecting the drive amount (rotation angle) of the output shaft of the motor 71.
- the motor potentiometer 71a is connected to the motor 71 via a link mechanism, and can detect the rotation angle of the output shaft of the motor 71. More specifically, the detection shaft of the potentiometer 71a for the motor is rotated according to the drive amount (rotation angle) of the output shaft of the motor 71, and the rotation angle is detected as the drive amount of the output shaft of the motor 71. Can do.
- the cell motor 72 is an actuator for starting the engine 14.
- the meter panel 73 shown in FIG. 2, FIG. 5, and FIG. 6 is for displaying various information related to the operation of the rice transplanter 1, the engine, the abnormality alarm, and the like.
- the meter panel 73 is disposed at the approximate center of the left and right of the dashboard 61 and in front of the steering handle 64.
- the control device 100 inputs a detection signal, and transmits a control signal to the motor 71, the cell motor 72, the meter panel 73, and the like based on the input detection signal and program.
- the control device 100 may be configured such that a CPU, ROM, RAM, HDD, and the like are connected by a bus, or may be configured by a one-chip LSI or the like.
- the control device 100 is connected to the pedal potentiometer 67a, and can obtain a detection signal (pedal signal) indicating the amount of depression of the shift pedal 67 by the pedal potentiometer 67a.
- the control device 100 is connected to the maximum speed setting dial 69 and can acquire a detection signal related to the operation position of the maximum speed setting dial 69.
- the control device 100 is connected to the seedling position detection switch 65a, and can acquire a detection signal (the above-mentioned seedling position detection signal) indicating that the main transmission lever 65 is at the seedling position from the seedling position detection switch 65a.
- the control device 100 is connected to the key switch 66, and obtains a detection signal (start signal) indicating that the start operation has been performed by the key switch 66 and a detection signal (stop signal) indicating that the stop operation has been performed. it can.
- the control device 100 is connected to the speed fixing switch 70a, and can acquire a detection signal indicating that the speed fixing lever 70 by the speed fixing switch 70a has been operated to the speed fixing position.
- the control device 100 is connected to the speed fixing release switch 70b, and can acquire a detection signal indicating that the speed fixing lever 70 by the speed fixing release switch 70b has been operated to the speed fixing release position.
- the control device 100 is connected to the brake operation detection switch 68a, and can acquire a detection signal indicating that the brake pedal 68 has been depressed by the brake operation detection switch 68a.
- the control device 100 is connected to the seedling end detection switch 49a, and can acquire a detection signal indicating that the seedling placement base 41 has reached a predetermined position by the seedling end detection switch 49a.
- the control device 100 is connected to the motor 71 and can transmit a control signal to the motor 71 to drive the motor 71.
- the control device 100 is connected to a motor potentiometer 71a, and can acquire a detection signal of the rotation angle of the motor 71 by the motor potentiometer 71a.
- the control device 100 can drive the motor 71 to a desired rotation angle by transmitting a control signal to the motor 71 until the detection signal from the motor potentiometer 71a reaches a desired rotation angle (target drive amount). it can.
- the control device 100 is connected to the cell motor 72 and can transmit a control signal to the cell motor 72 to drive the cell motor 72.
- the control device 100 is connected to the meter panel 73, and can display the information when an operation state or abnormality of the engine or the work machine is detected.
- the control device 100 when the control device 100 acquires a detection signal (start signal) indicating that the key switch 66 has been started, the cell motor 72 is driven to start the engine 14. In addition, when the control device 100 acquires a detection signal (stop signal) indicating that the key switch 66 has been stopped, the control device 100 drives the motor 71 to cut off the fuel supply by the speed governor 14a (in this embodiment). In the case of a diesel engine or a gasoline engine, the ignition device is stopped), and the engine 14 is stopped.
- control device 100 acquires the pedal signal indicating the depression amount of the shift pedal 67
- the control device 100 calculates a target drive amount of the motor 71 based on the acquired pedal signal. Then, the control device 100 drives the motor 71 by the calculated target drive amount to change the rotation speed of the engine 14, change the speed ratio of the HMT 21, change the connection / disconnection of the clutch 21c, and change the operation of the braking device 21d. I do.
- the control device 100 has a relationship between the depression amount of the speed change pedal 67 and the driving amount of the motor 71 (more specifically, the rotation angle of the detection shaft of the pedal potentiometer 67a and the rotation angle of the detection shaft of the motor potentiometer 71a).
- a map indicating the relationship between the two is stored.
- the control device 100 acquires the pedal signal indicating the depression amount of the shift pedal 67
- the controller 100 drives the motor 71 corresponding to the acquired pedal signal (the rotation angle of the detection shaft of the pedal potentiometer 67a) in the map.
- the amount (the rotation angle of the detection shaft of the motor potentiometer 71a) is calculated as the target drive amount.
- the control device 100 drives the motor 71 so that the rotation angle of the detection shaft of the motor potentiometer 71a becomes the target drive amount.
- this will be specifically described with reference to FIG.
- the rotation angle ⁇ of the shift pedal 67 when the shift pedal 67 is not depressed is ⁇ 1 (degrees).
- the rotation angle ⁇ of the detection shaft of the pedal potentiometer 67a is ⁇ 1 (degrees).
- the control device 100 calculates the rotation angle ⁇ 1 (degree) of the detection shaft of the motor potentiometer 71a corresponding to the rotation angle ⁇ 1 of the pedal potentiometer 67a as a target drive amount in FIG. Then, the control device 100 drives the motor 71 so that the rotation angle ⁇ of the motor potentiometer 71a becomes ⁇ 1.
- the rotational speed N of the engine 14 is set to N1 (rpm) via the link mechanism.
- the inclination angle of the movable swash plate of the HST 21a is set to be maximum via the link mechanism.
- the control device 100 does not drive the motor 71 in order to maintain the rotation angle ⁇ of the motor potentiometer 71a as ⁇ 1 regardless of the value of the rotation angle ⁇ of the pedal potentiometer 67a.
- the rice transplanter 1 can increase (accelerate) the vehicle speed V of the rice transplanter 1 by depressing the shift pedal 67. Contrary to the above description, the vehicle speed V of the rice transplanter 1 can be reduced (decelerated) by returning the stepped-on shift pedal 67 to the original position.
- the control device 100 detects from the seeding position detection switch 65a that the main transmission lever 65 is in the seeding position (seeding position detection signal). To get.
- the control device 100 drives the motor 71 so that the rotation angle ⁇ of the motor potentiometer 71a decreases from ⁇ 1 to ⁇ min.
- the speed governor 14a of the engine 14 is driven via the link mechanism, and the rotational speed N of the engine 14 is the first idling rotation. It decreases from the number N1 to the second idling speed Nmin.
- the first idling rotation speed N1 is a rotation speed that can be immediately applied when the rice transplanter 1 (traveling unit 10) is started by depressing the shift pedal 67 (for example, about 1800 rotations). Therefore, the rice transplanter 1 can start smoothly at the first idling speed N1.
- the second idling rotational speed Nmin is set to a rotational speed lower than the first idling rotational speed N1 (for example, about 1000 revolutions). Further, the second idling rotational speed Nmin is a rotational speed at which the engine is not stalled (the engine 14 is not stopped), and is the lowest rotational speed at which the engine 14 can be maintained in the activated state. Therefore, the fuel consumption of the engine 14 can be suppressed at the second idling speed Nmin.
- the rice transplanter 1 does not accept a transmission operation by depressing the transmission pedal 67. That is, when the control device 100 acquires the seedling position detection signal, the rotation angle ⁇ of the motor potentiometer 71a is constant regardless of the value of the acquired pedal signal (regardless of the depression amount of the shift pedal 67). The motor 71 is driven so as to have a magnitude ⁇ min. As a result, when the main transmission lever 65 is operated to the seeding position, the operation of the transmission pedal 67 becomes invalid, and even when the transmission pedal 67 is depressed, the engine speed N is the first regardless of the depression amount. The second idling speed Nmin is maintained. Therefore, it is possible to prevent erroneous operation of the shift pedal 67.
- the state of the rice transplanter 1 when the engine 14 is rotating at the second idling speed Nmin is referred to as a seedling ecological state.
- the rotational speed N of the engine 14 decreases to the second idling rotational speed Nmin. Therefore, the energy saving effect can be enhanced by operating the main transmission lever 65 to the seeding position when the rice transplanter is stopped for a while, for example, when the worker performs the seeding work. It is possible to suppress wasteful fuel consumption by the engine 14. In addition, noise can be suppressed.
- the engine 14 when the key switch 66 is started in a state where the main transmission lever 65 is operated to the seeding position, the engine 14 does not rotate at the second idling speed Nmin, and the seeding process is performed. It is good also as a structure which does not transfer to an eco state. In this case, the engine 14 rotates at a rotational speed N corresponding to the amount of depression of the shift pedal 67 as shown in (2-1) to (2-5) above.
- the key switch 66 when the key switch 66 is started in the state where the main transmission lever 65 is operated to the seeding position, when the transmission pedal 67 is not depressed (the rotation angle ⁇ of the transmission pedal 67 is ⁇ 1). ), The engine 14 rotates at the first idling speed N1 (see (2-1) above). In the same case, when the rotation angle ⁇ of the shift pedal 67 is greater than ⁇ 1 and less than ⁇ 2, the engine 14 rotates at the first idling speed N1 (see (2-2) above). In the same case, when the rotation angle ⁇ of the shift pedal 67 is ⁇ 2, the engine 14 rotates at the rotation speed N2 (see (2-3) above).
- the key switch 66 is changed from OFF to ON in the state where the main transmission lever 65 is operated to the seeding position (the seeding position detection switch is ON).
- the motor 71 is driven so that the rotation angle ⁇ (motor position) of the motor potentiometer 71a becomes ⁇ 1.
- the engine 14 rotates at the first idling speed N1 and does not shift to the seedling ecological state. It is assumed that the speed change pedal 67 is not depressed.
- the control device 100 acquires the start signal and the seedling joining position detection signal and acquires the pedal signal ⁇ 1 from the pedal potentiometer 67a, the rotation angle ⁇ of the motor potentiometer 71a becomes ⁇ 1.
- the motor 71 is driven so that Thereby, the control device 100 rotates the engine 14 at the first idling rotational speed N1. Therefore, since the engine 14 rotates at the first idling rotation speed N1 when starting, the engine 14 can be started smoothly.
- the key switch 66 is started from OFF to ON while the main transmission lever 65 is operated to the neutral position (the seedling position detection switch is OFF).
- the motor 71 is driven so that the rotation angle ⁇ of the motor potentiometer 71a becomes ⁇ 1.
- the engine 14 rotates at the first idling speed N1. It is assumed that the speed change pedal 67 is not depressed.
- the main transmission lever 65 is operated to the seeding position (the seeding position detection switch is ON) (key When the switch 66 is started from OFF to ON), that is, when the transition to the above-described seedling ecological state is not performed, from this state, the main transmission lever 65 is in the neutral position (the state where the seedling joint position detection switch is OFF).
- the motor 71 may be driven so that the rotation angle ⁇ of the motor potentiometer 71a becomes ⁇ min when operated in the order of the seedling joining position (the state where the seedling joining position detection switch is ON).
- the control device 100 acquires the start signal from the key switch 66 and also acquires the seedling joining position detection signal from the seedling joining position detection switch 65a, and then acquires the seedling joining position detection signal again. Based on the joint position detection signal, the motor 71 is driven so that the rotation angle ⁇ of the motor potentiometer 71a becomes ⁇ min. Thereby, the control device 100 rotates the engine 14 at the second idling rotational speed Nmin.
- the blower of the fertilizer is In contrast to this, when the main transmission lever 65 is not operated to the seeding position, the blower may be driven.
- the blower is stopped at the same time, so that it is possible to reduce power consumption and prevent the battery from going up. This is advantageous. Further, it is possible to suppress noise from the blower.
- the planting clutch (PTO) 55 operation may not be accepted, and the planting clutch 55 may be always disconnected. Thereby, it is possible to prevent erroneous operation of the planting clutch 55.
- the buzzer sound during automatic control of automatic planting may be eliminated.
- smooth turn control there are many cases where smooth turn control is in progress, and it is annoying if the buzzer due to smooth turn control continues to ring, but it can be solved by configuring so that the buzzer sound is erased as described above. is there.
- the rice transplanter 1 Engine 14 As described above, the rice transplanter 1 Engine 14; A main speed change mechanism 22 for shifting the power of the engine 14 and transmitting it to the wheels 12 and 13; A shift stage of the main transmission mechanism 22 is connected to the main transmission mechanism 22 and can be operated to a plurality of shift positions including a seeding position, and when operated to the shift position, the shift stage of the main transmission mechanism 22 corresponds to the operated shift position.
- the rotational speed N of the engine 14 decreases to the second idling rotational speed Nmin. Accordingly, when the rice transplanter 1 is stopped for a while, for example, when an operator performs a seeding operation, the energy-saving effect can be enhanced by operating the main transmission lever 65 to the seeding position. It is possible to suppress wasteful fuel consumption by the engine 14. Further, noise from the engine 14 can be suppressed. This facilitates conversation with the operator.
- Said 1st idling rotation speed is rotation speed which can respond immediately when starting rice transplanter 1
- the second idling rotational speed is a rotational speed at which the engine 14 does not stop.
- the rice transplanter 1 can start smoothly at the first idling speed N1. Further, at the second idling rotational speed Nmin, the fuel consumption of the engine 14 can be suppressed.
- the engine 14 rotates the first idling.
- Drive the motor 71 to rotate by a number When the main transmission lever 65 is in the seeding position, the key switch 66 starts outputting the start signal, and then the main transmission lever 65 is operated to the shifting position different from the seeding position.
- the motor 71 is driven so that the engine 14 rotates at the second idling speed.
- the following describes a rice transplanter that can accelerate and decelerate according to the amount of depressing of the shift pedal when accelerating or decelerating by depressing operation of the shift pedal, and can contribute to improving the shift feeling.
- a general rice transplanter has an actuator for changing the vehicle speed (acceleration / deceleration control).
- the rice transplanter calculates the target drive amount of the actuator based on the depression amount of the shift pedal when the shift pedal is depressed, and drives the actuator so that the drive amount of the actuator becomes the target drive amount. Then, acceleration / deceleration is performed by changing the vehicle speed to a size corresponding to the target drive amount of the actuator.
- the drive amount of the actuator is always increased or decreased constantly. That is, the general rice transplanter is configured such that the ratio of the change in the target drive amount of the actuator to the change in the depression amount of the shift pedal is always a constant value (the same value).
- the engine An actuator for changing the rotational speed of the engine; An actuator drive amount detection device for detecting the drive amount of the actuator; A speed change pedal for operating the actuator; A pedal operation amount detection device that detects a depression amount of the shift pedal and outputs a pedal signal indicating the depression amount; Calculate the target drive amount of the actuator based on the pedal signal output by the pedal operation amount detection device, drive the actuator so that the detection value of the actuator drive amount detection device becomes the target drive amount, Changing the vehicle speed to a size corresponding to the target drive amount of the actuator, A rice transplanter,
- the operation range of the shift pedal is divided into a plurality of shift regions, For each of the plurality of shift regions, a ratio of a change in the target drive amount of the actuator to a change in the depression amount of the shift pedal is set.
- acceleration / deceleration can be performed with gradual acceleration corresponding to the depressing amount of the shift pedal, which can contribute to improvement of the shift feeling.
- a change in the target drive amount of the actuator with respect to a change in the step amount of the shift pedal Is set to a constant value.
- the control device 100 includes a relationship between the depression amount of the speed change pedal 67 and the target drive amount of the motor 71 (more specifically, the rotation angle ⁇ of the detection shaft of the pedal potentiometer 67a and the detection shaft of the motor potentiometer 71a. A map showing the relationship with the rotation angle ⁇ of the image is stored.
- FIG. 10 (a) and FIG. 10 (b) show the map. 10 (a) and 10 (b), the horizontal axis represents the rotation angle ⁇ of the detection shaft of the pedal potentiometer 67a, and the vertical axis represents the rotation angle ⁇ of the detection shaft of the motor potentiometer 71a. Yes.
- the detection shaft of the pedal potentiometer 67a is configured to rotate within a range of rotation angles ⁇ 1 to ⁇ max.
- the rotation angle ⁇ 1 is the rotation angle of the detection shaft of the pedal potentiometer 67a when the shift pedal 67 is not depressed.
- the rotation angle ⁇ max is the rotation angle of the detection shaft of the pedal potentiometer 67a when the shift pedal 67 is depressed to the limit.
- the region from ⁇ 1 to ⁇ max further includes a play region ( ⁇ 1 or more and less than ⁇ 2), a connection region ( ⁇ 2), a speed change region (greater than ⁇ 2 and less than ⁇ 3), and the highest speed. It is divided into holding regions ( ⁇ 3 or more and ⁇ max or less).
- the rotation angle ⁇ of the motor potentiometer 71a is held at a constant value ( ⁇ 1).
- the rotation angle ⁇ of the motor potentiometer 71a is held at a constant value ( ⁇ 2).
- the rotation angle ⁇ of the motor potentiometer 71a increases from ⁇ 2 corresponding to the rotation angle ⁇ 2 as the rotation angle ⁇ of the pedal potentiometer 67a increases. , Increase to ⁇ max corresponding to the rotation angle ⁇ 3.
- the rotation angle ⁇ of the motor potentiometer 71a is held at a constant value ( ⁇ max).
- the region from ⁇ 2 to ⁇ 3 is further divided into a plurality of shift regions. That is, the shift region includes a first shift region (greater than ⁇ 2 and less than ⁇ 21), a second shift region ( ⁇ 21 and less than ⁇ 22), a third shift region ( ⁇ 22 and less than ⁇ 23), and a fourth shift region ( ⁇ 23 and more and ⁇ 3). Less).
- the number of divisions is not limited.
- the width to be divided is not limited.
- the rotation angle ⁇ of the motor potentiometer 71a corresponds to the rotation angle ⁇ 2 in proportion to the increase in the rotation angle ⁇ of the pedal potentiometer 67a. Increases from ⁇ 2 to ⁇ 21 corresponding to the rotation angle ⁇ 21.
- the ratio of the change in the target drive amount of the motor 71 with respect to the change in the depression amount of the shift pedal 67 (the ratio of the change in the rotation angle ⁇ with respect to the change in the rotation angle ⁇ ) (X1) is It becomes a constant value ( ⁇ 21 ⁇ 2) / ( ⁇ 21 ⁇ 2).
- the rotation angle ⁇ of the motor potentiometer 71a corresponds to the rotation angle ⁇ 21 in proportion to the increase in the rotation angle ⁇ of the pedal potentiometer 67a. It increases from ⁇ 21 to ⁇ 22 corresponding to the rotation angle ⁇ 22.
- the ratio (X2) of the change in the rotation angle ⁇ to the change in the rotation angle ⁇ is a constant value ( ⁇ 22 ⁇ 21) / ( ⁇ 22 ⁇ 21).
- the rotation angle ⁇ of the motor potentiometer 71a corresponds to the rotation angle ⁇ 22 in proportion to the increase in the rotation angle ⁇ of the pedal potentiometer 67a. It increases from ⁇ 22 to ⁇ 23 corresponding to the rotation angle ⁇ 23.
- the ratio (X3) of the change in the rotation angle ⁇ to the change in the rotation angle ⁇ is a constant value ( ⁇ 23 ⁇ 22) / ( ⁇ 23 ⁇ 22).
- the rotation angle ⁇ of the motor potentiometer 71a corresponds to the rotation angle ⁇ 23 in proportion to the increase in the rotation angle ⁇ of the pedal potentiometer 67a. It increases from ⁇ 23 to ⁇ max corresponding to the rotation angle ⁇ 3.
- the ratio (X4) of the change in the rotation angle ⁇ to the change in the rotation angle ⁇ is a constant value ( ⁇ max ⁇ 23) / ( ⁇ 3- ⁇ 23).
- the above (X1) to (X4) are different. That is, in the map, the ratio of the change in the target drive amount of the motor 71 to the change in the depression amount of the shift pedal 67 for each shift region of the first shift region to the fourth shift region is (X1) to (X X4).
- the present embodiment is configured such that (X2) ⁇ (X1) ⁇ (X3) ⁇ (X4).
- the control device 100 when the control device 100 acquires a detection signal (start signal) indicating that the key switch 66 has been started, the cell motor 72 is driven to start the engine 14. In addition, when the control device 100 acquires a detection signal (stop signal) indicating that the key switch 66 has been stopped, the control device 100 drives the motor 71 to cut off the fuel supply by the speed governor 14a (in this embodiment). In the case of a diesel engine or a gasoline engine, the ignition device is stopped), and the engine 14 is stopped.
- the control device 100 acquires the pedal signal indicating the depression amount of the shift pedal 67, the motor corresponding to the acquired pedal signal (the rotation angle ⁇ of the detection shaft of the pedal potentiometer 67a) in the map.
- the target drive amount 71 (the rotation angle ⁇ of the detection shaft of the motor potentiometer 71a) is calculated.
- the control device 100 drives the motor 71 so that the rotation angle of the detection shaft of the motor potentiometer 71a becomes the target drive amount.
- the control device 100 drives the motor 71 to change the rotation speed of the engine 14, change the speed ratio of the HMT 21, change the connection / disconnection of the clutch 21c, and change the operation of the braking device 21d.
- the vehicle speed of the rice transplanter 1 changes and acceleration / deceleration is performed.
- the rotation angle ⁇ of the pedal potentiometer 67a increases at a stretch from the rotation angle ⁇ a in the third shift region to the rotation angle ⁇ b in the fourth shift region.
- the target drive amount of the motor 71 (the rotation angle ⁇ of the motor potentiometer 71a) is proportional to the increase of the rotation angle ⁇
- the target drive amount is ⁇ a corresponding to the rotation angle ⁇ b and ⁇ b corresponding to the rotation angle ⁇ b.
- the region Z is configured as a movement range when the motor 71 follows.
- the rotation angle ⁇ of the shift pedal 67 when the shift pedal 67 is not depressed is ⁇ 1 (degrees).
- the rotation angle ⁇ of the detection shaft of the pedal potentiometer 67a is ⁇ 1 (degrees).
- the control device 100 uses the rotation angle ⁇ 1 (degree) of the detection shaft of the motor potentiometer 71a corresponding to the rotation angle ⁇ 1 of the pedal potentiometer 67a as the target drive amount in the map shown in FIG. calculate. Then, the control device 100 drives the motor 71 so that the rotation angle ⁇ of the motor potentiometer 71a becomes ⁇ 1.
- the rotational speed N of the engine 14 is set to N1 (rpm) via the link mechanism (see FIG. 7).
- the inclination angle of the movable swash plate of the HST 21a is set to be maximum via the link mechanism.
- the control device 100 determines that the ratio of the change in the rotation angle ⁇ to the change in the rotation angle ⁇ is a constant value ( ⁇ max ⁇ 2) / ( ⁇ 3 ⁇ The motor 71 is driven so that ⁇ 2). That is, at this time, the control device 100 sets the ratio of the change in the target drive amount of the motor 71 to the change in the depression amount of the shift pedal 67 to a constant value ( ⁇ max ⁇ 2) / ( ⁇ 3- ⁇ 2).
- the control device 100 determines that the ratio of the change in the rotation angle ⁇ to the change in the rotation angle ⁇ is a constant value ( ⁇ max ⁇ 2) / ( ⁇ 3- ⁇ 2).
- the motor 71 is driven so that. Thereby, the rice transplanter 1 can be smoothly accelerated.
- the rice transplanter 1 can increase (accelerate) the vehicle speed V of the rice transplanter 1 by depressing the shift pedal 67. Contrary to the above description, the vehicle speed V of the rice transplanter 1 can be reduced (decelerated) by returning the stepped-on shift pedal 67 to the original position.
- the ratio of the change in the target drive amount of the motor 71 to the change in the depression amount of the shift pedal 67 (X1) to (X X4) is different.
- the acceleration of the rice transplanter 1 differs for every shift area.
- the magnitude relationship of (X1) to (X4) is configured such that (X2) ⁇ (X1) ⁇ (X3) ⁇ (X4).
- the acceleration of the rice transplanter 1 is greatest when the shift pedal 67 is depressed within the fourth shift region ( ⁇ 23 or more and less than ⁇ 3) (see (iv) above), and the shift pedal 67 is shifted to the third shift.
- the time when the pedal is depressed in the region ( ⁇ 22 or more and less than ⁇ 23) is the second largest (see (iv) above), and the shift pedal 67 is depressed in the first gear region (greater than ⁇ 2 and less than ⁇ 21).
- the rate of change (the ratio of the change in the target drive amount of the motor 71 with respect to the change in the depressing amount of the shift pedal 67) in the low speed range.
- the rate of change is configured to be larger in the high speed range than in the low speed range.
- the rice transplanter 1 when the rice transplanter 1 accelerates or decelerates by depressing operation of the shift pedal 67, it can perform acceleration / deceleration with gradual acceleration corresponding to the depressing amount of the shift pedal 67 in a low speed range or a high speed range. It is possible to contribute to improvement. Further, the rice transplanter 1 divides the shift area into a plurality of shift areas, and sets a change rate for each of the divided shift areas. Thus, when changing the change rate according to the planting condition, the field condition, the operator's preference, etc., it is not necessary to change the change rate as a whole, and the change rate in the corresponding shift region is set to a desired value. Change to Thereby, the change rate can be easily changed. Further, since the change ratios are constant (X1) to (X4) in each shift region, the traveling speed can be easily brought close to a desired speed when the speed is fixed by the speed fixing lever 70. It becomes easy to fix the speed at the running speed.
- the rice transplanter 1 Engine 14 A motor 71 for changing the rotational speed of the engine 14, A shift pedal 67 for operating the motor 71;
- the target drive amount of the motor 71 is calculated based on the operation amount of the shift pedal 67, the motor 71 is driven so as to become the target drive amount, and the vehicle speed is changed to a magnitude corresponding to the target drive amount of the motor 71.
- the operation range of the shift pedal 67 is divided into a first shift region to a fourth shift region,
- the ratios (X1) to (X4) of the change in the target drive amount of the motor 71 with respect to the change in the depression amount of the shift pedal 67 are set for each of the first to fourth shift regions.
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Abstract
Description
作業時におけるアイドリング回転数は、前記変速ペダルの踏み込み操作が行われて田植機が発進される際に、田植機がスムーズに発進できる回転数に設定されている。
また、上記一般的な田植機は、前記変速ペダルが踏み込み操作されるとき、前記アクチュエータの駆動量を常に一定に増減する。すなわち一般的な田植機においては、変速ペダルの踏み込み量の変化に対する前記アクチュエータの目標駆動量の変化の割合が常に一定値(同じ値)になるように構成されている。これにより、作業者が変速ペダルの踏み込み操作により田植機を加減速する際に、きめ細かい増減速制御が行えず、変速フィーリングが低下する点で不利である。
エンジンと、
前記エンジンの動力を変速して車輪に伝達する変速機と、
前記変速機に接続され、苗継ぎ位置を含む複数の変速位置に操作可能であり、前記変速位置に操作されるときに、操作された変速位置に対応するように前記変速機の変速段を変更する主変速レバーと、
前記エンジンの回転数の変更を行うためのアクチュエータと、
前記アクチュエータを操作するための変速操作具と、
を備え、
前記主変速レバーが前記苗継ぎ位置にない場合で、前記変速操作具が操作されていないときに、前記エンジンが第一アイドリング回転数で回転するように前記アクチュエータを駆動し、
前記主変速レバーが前記苗継ぎ位置にある場合に、前記エンジンが前記第一アイドリング回転数よりも低い回転数である第二アイドリング回転数で回転するように前記アクチュエータを駆動する。
前記第一アイドリング回転数は、前記田植機を発進させる際に即応可能な回転数であり、
前記第二アイドリング回転数は、前記エンジンが停止しない回転数である。
前記田植機は、前記エンジンを始動させるための操作具であり、前記エンジンを始動させるための始動操作が行われるときに始動信号を出力する始動装置を備え、
前記主変速レバーが前記苗継ぎ位置にあり、かつ、前記変速操作具が操作されていない状態で、前記始動装置による前記始動信号の出力が開始されたときに、前記エンジンが前記第一アイドリング回転数で回転するように前記アクチュエータを駆動し、
前記主変速レバーが前記苗継ぎ位置にある状態で、前記始動装置による前記始動信号の出力が開始され、その後、前記主変速レバーが前記苗継ぎ位置とは異なる前記変速位置に操作されて、その後、前記主変速レバーが前記苗継ぎ位置に操作されたときに、前記エンジンが前記第二アイドリング回転数で回転するように前記アクチュエータを駆動する。
前記変速操作具の操作量に基づいて前記アクチュエータの目標駆動量を算出して、前記目標駆動量になるように前記アクチュエータを駆動して、車速を前記アクチュエータの目標駆動量に対応した大きさに変更し、
前記変速操作具の操作範囲を複数の変速領域に分割して、
前記複数の変速領域毎に、前記変速操作具の操作量の変化に対する前記アクチュエータの目標駆動量の変化の割合を設定する。
前記変速操作具が、前記複数の変速領域のうちの、一の変速領域から他の変速領域に一気に踏み込み操作されるときには、前記変速操作具の操作量の変化に対する前記アクチュエータの目標駆動量の変化の割合を一定値に設定する。
エンジンと、
前記エンジンの回転数の変更を行うためのアクチュエータと、
前記アクチュエータを操作するための変速操作具と、
を備え、
前記変速操作具の操作量に基づいて前記アクチュエータの目標駆動量を算出して、前記目標駆動量になるように前記アクチュエータを駆動して、車速を前記アクチュエータの目標駆動量に対応した大きさに変更し、
前記変速操作具の操作範囲を複数の変速領域に分割して、
前記複数の変速領域毎に、前記変速操作具の操作量の変化に対する前記アクチュエータの目標駆動量の変化の割合を設定する。
前記変速操作具が、前記複数の変速領域のうちの、一の変速領域から他の変速領域に一気に踏み込み操作されるときには、前記変速操作具の操作量の変化に対する前記アクチュエータの目標駆動量の変化の割合を一定値に設定する。
14 エンジン
21 HMT
21a HST
21b 遊星歯車機構
65 主変速レバー
65a 苗継ぎ位置検出スイッチ
66 キースイッチ
67 変速ペダル
67a ペダル用ポテンショメータ
71 モータ
100 制御装置
また、制動装置21dは、主変速機構22の出力軸の回動を制動することができるものである。
変速ペダル67が踏み込み操作されたとき、ペダル用ポテンショメータ67aが変速ペダル67の踏み込み量を示すペダル信号を出力する。
主変速レバー65は、路上走行位置、植付位置、苗継ぎ位置、後進位置または中立位置に変更可能である。
主変速レバー65が路上走行位置に切り換えられた場合、主変速機構22の変速段が高速に変更される。この場合、田植機1は高速で走行することができる。
主変速レバー65が植付位置に切り換えられた場合、主変速機構22の変速段が低速に変更される。この場合、田植機1は、主変速機構22の変速段が高速である場合に比べて低速で走行することができる。
主変速レバー65が苗継ぎ位置に切り換えられた場合、主変速機構22の変速段が中立に変更される。この場合、田植機1は走行することができない。またこの場合、後述する苗継ぎ位置検出スイッチ65aにより主変速レバー65が苗継ぎ位置に切り換えられたことを検出し、後述する制御装置100によりエンジン14の回転数を変更する等の所定の制御を行うことができる。
主変速レバー65が後進位置に切り換えられた場合、主変速機構22の変速段が逆転に変更される。この場合、田植機1は後進することができる。
主変速レバー65が中立位置に切り換えられた場合、主変速機構22の変速段が中立に変更される。この場合、田植機1は走行することができない。
主変速レバー65が苗継ぎ位置に操作されたとき、苗継ぎ位置検出スイッチ65aは、当該主変速レバー65が苗継ぎ位置にあることを示す苗継ぎ位置信号を出力する。
キースイッチ66が始動操作されるとき(OFFからONに切り換えられるとき)、エンジン14が始動する。また、このときキースイッチ66は、始動操作が行われたことを示す始動信号を出力する。
キースイッチ66がONの状態のとき、エンジン14が駆動し続ける。
キースイッチ66が停止操作されるとき(ONからOFFに切り換えられるとき)、エンジン14が停止する。また、このときキースイッチ66は、停止操作が行われたことを示す停止信号を出力する。
キースイッチ66がOFFの状態のとき、エンジン14は停止し続ける。
速度固定レバー70は、速度固定位置、速度固定解除位置または中立位置に回動可能である。速度固定位置は、速度固定レバー70を後方に回動させた際の位置である。速度固定解除位置は、速度固定レバー70を前方に回動させた際の位置である。中立位置は、速度固定位置と速度固定解除位置の略中間の位置である。速度固定レバー70は、速度固定位置または速度固定解除位置のいずれかに操作された場合であっても、再び中立位置に復帰するように常時付勢されている。
モータ71の出力軸はリンク機構を介してHST21aの可動斜板に連結される。モータ71により当該可動斜板の傾斜角度が変更され、HST21aの変速比を変更することができる。
モータ71の出力軸はリンク機構を介してクラッチ21cに連結される。モータ71によりクラッチ21cが切断または接続される。
モータ71の出力軸はリンク機構を介して制動装置21dに連結される。モータ71により制動装置21dが作動されると、前車輪12および後車輪13へと出力される動力を制動することができる。
制御装置100は最高速設定ダイヤル69に接続され、最高速設定ダイヤル69の操作位置に関する検出信号を取得することができる。
制御装置100は苗継ぎ位置検出スイッチ65aに接続され、苗継ぎ位置検出スイッチ65aから主変速レバー65が苗継ぎ位置にある旨の検出信号(上記苗継ぎ位置検出信号)を取得することができる。
制御装置100はキースイッチ66に接続され、キースイッチ66により始動操作が行われた旨の検出信号(始動信号)、および停止操作が行われた旨の検出信号(停止信号)を取得することができる。
制御装置100は速度固定スイッチ70aに接続され、速度固定スイッチ70aによる速度固定レバー70が速度固定位置に操作された旨の検出信号を取得することができる。
制御装置100は速度固定解除スイッチ70bに接続され、速度固定解除スイッチ70bによる速度固定レバー70が速度固定解除位置に操作された旨の検出信号を取得することができる。
制御装置100はブレーキ操作検出スイッチ68aに接続され、ブレーキ操作検出スイッチ68aによるブレーキペダル68が踏み込み操作された旨の検出信号を取得することができる。
制御装置100は苗台端検出スイッチ49aに接続され、苗台端検出スイッチ49aによる苗載台41が所定の位置に到達した旨の検出信号を取得することができる。
制御装置100はモータ用ポテンショメータ71aに接続され、モータ用ポテンショメータ71aによるモータ71の回動角の検出信号を取得することができる。
制御装置100はモータ用ポテンショメータ71aによる検出信号が所望の回動角(目標駆動量)になるまでモータ71に制御信号を送信することにより、当該モータ71を所望の回動角まで駆動することができる。
制御装置100はメータパネル73に接続され、エンジンや作業機の動作状況や異常等を検知したときにその情報を表示することができる。
なお、説明の便宜上、主変速レバー65は植付位置に操作されていることとする。
また、田植機1の変速ペダル67が、以下の(1-1)~(1-5)の順序で踏み込み操作されることとする。
また、この場合、リンク機構を介して制動装置21dが作動する。これによって、前車輪12および後車輪13が制動され、田植機1が不意に前進または後進するのを防止することができる。
また、この場合、リンク機構を介してHST21aの可動斜板の傾斜角度が最大となるように設定される。これによって、エンジン14からの動力とHST21aからの動力が遊星歯車機構21bによって互いに打ち消すように合成され、主変速機構22へ動力が伝達されることがない。
同様に、モータ用ポテンショメータ71aの回動角γがγ1に保持されている場合、制動装置21dが作動した状態に維持される。
同様に、モータ用ポテンショメータ71aの回動角γがγ1に保持されている場合、HST21aの可動斜板の傾斜角度が最大のまま維持される。
同様に、モータ用ポテンショメータ71aの回動角γがγ2になると、制動装置21dが解除される。これによって、前車輪12および後車輪13の制動が解除され、田植機1が前進または後進可能となる。
同様に、モータ用ポテンショメータ71aの回動角γがγ2からγmaxまで増加するようにモータ71が駆動すると、リンク機構を介してHST21aの可動斜板の傾斜角度が減少するように駆動される。これによってエンジン14の動力はHMT21を介して前車輪12および後車輪13に伝達されて、田植機1の車速Vは0からVmaxまで増加する。
したがって、エンジン14の回転数NはNmaxのまま、田植機1の車速VはVmaxのまま、それぞれ維持される。このようにして、変速ペダル67の踏み込み操作に対して田植機1の車速Vが増加しない領域(いわゆる「余裕代」)が設けられる。
従って、主変速レバー65が中立位置に操作さているとき、変速ペダル67の踏み込み量に関わらず、すなわちペダル用ポテンショメータ67aの回動角βの値に関わらず、田植機1の走行停止した状態(V=0)が維持される。
詳細には、以下に示す(2-1)~(2-5)のようにエンジン14の回転数が変化する。
なお、説明の便宜上、主変速レバー65が中立位置に操作されているとき、変速ペダル67が踏み込み操作されておらず、エンジン14が第一アイドリング回転数N1で回転していることとする。
モータ用ポテンショメータ71aの回動角γがγ1からγminまで減少ようにモータ71が駆動すると、リンク機構を介してエンジン14の調速装置14aが駆動され、エンジン14の回転数Nが第一アイドリング回転数N1から第二アイドリング回転数Nminまで減少する。
従って、第一アイドリング回転数N1では、田植機1がスムーズに発進することが可能となる。
また、第二アイドリング回転数Nminは、エンストしない(エンジン14が停止しない)回転数であり、エンジン14の起動状態を維持可能な最低回転数である。
従って、第二アイドリング回転数Nminでは、エンジン14の燃料消費を抑えることが可能となる。
すなわち、制御装置100は、苗継ぎ位置検出信号を取得するとき、取得するペダル信号の値に関係なく(変速ペダル67の踏み込み量に関わらず)、モータ用ポテンショメータ71aの回動角γが一定の大きさγminになるようにモータ71を駆動する。
これにより、主変速レバー65が苗継ぎ位置に操作される場合、変速ペダル67の操作が無効となり、変速ペダル67が踏み込み操作されても、踏み込み量に関係なく、エンジン14の回転数Nが第二アイドリング回転数Nminに維持される。
従って、変速ペダル67の誤操作を防止することが可能である。
この場合、エンジン14は、上記(2-1)~(2-5)に示すように、変速ペダル67の踏み込み量に対応した回転数Nで回転する。
また、同様の場合において、変速ペダル67の回動角αが、α1より大きくα2未満のとき、エンジン14が第一アイドリング回転数N1で回転する(上記(2-2)参照)。
また、同様の場合において、変速ペダル67の回動角αが、α2のとき、エンジン14が回転数N2で回転する(上記(2-3)参照)。
また、同様の場合において、変速ペダル67の回動角αが、α2以上α3未満のとき、エンジン14が回転数Nmaxで回転する(上記(2-4)参照)。
また、同様の場合において、変速ペダル67の回動角αが、α3以上αmax未満のとき、エンジン14が回転数Nmaxで回転する(上記(2-5)参照)。
すなわち、制御装置100は、始動信号を取得するとともに、苗継ぎ位置検出信号を取得する場合で、ペダル用ポテンショメータ67aからペダル信号β1を取得するとき、モータ用ポテンショメータ71aの回動角γがγ1になるようにモータ71を駆動する。これにより、制御装置100は、エンジン14を第一アイドリング回転数N1で回転させる。
従って、エンジン14が始動時に第一アイドリング回転数N1で回転するので、エンジン14をスムーズに始動させることが可能となる。
すなわち制御装置100は、キースイッチ66から始動信号を取得するとともに、苗継ぎ位置検出スイッチ65aから苗継ぎ位置検出信号を取得した後に、再び苗継ぎ位置検出信号を取得する場合に、再び取得した苗継ぎ位置検出信号に基づいて、モータ用ポテンショメータ71aの回動角γがγminになるようにモータ71を駆動する。これにより、制御装置100は、エンジン14を第二アイドリング回転数Nminで回転させる。
これにより、主変速レバー65が苗継ぎ位置に操作されて田植機1が苗継ぎエコ状態となるとき、同時に上記ブロワが停止されるので、消費電力を軽減することが可能であり、バッテリ上がり防止の点で有利である。また、上記ブロワからの騒音を抑制することが可能である。
エンジン14と、
エンジン14の動力を変速して車輪12・13に伝達する主変速機構22と、
主変速機構22に接続され、苗継ぎ位置を含む複数の変速位置に操作可能であり、前記変速位置に操作されるときに、操作された変速位置に対応するように主変速機構22の変速段を変更する主変速レバー65と、
エンジン14の回転数の変更を行うためのモータ71と、
モータ71を操作するための変速ペダル67と、
を備え、
主変速レバー65が前記苗継ぎ位置にない場合で、変速ペダル67が踏み込み操作されていないときに、エンジン14が第一アイドリング回転数で回転するようにモータ71を駆動し、
主変速レバー65が前記苗継ぎ位置にある場合に、エンジン14が前記第一アイドリング回転数よりも低い回転数である第二アイドリング回転数で回転するようにモータ71を駆動する。
また、エンジン14からの騒音を抑制することが可能である。これによりオペレータとの会話が容易になる。
前記第一アイドリング回転数は、田植機1を発進させる際に即応可能な回転数であり、
前記第二アイドリング回転数は、エンジン14が停止しない回転数である。
また、第二アイドリング回転数Nminでは、エンジン14の燃料消費を抑えることが可能となる。
エンジン14を始動させるための操作具であり、エンジン14を始動させるための始動操作が行われるときに始動信号を出力するキースイッチ66を備え、
主変速レバー65が前記苗継ぎ位置にあり、かつ、変速ペダル67が踏み込み操作されていない状態で、キースイッチ66による前記始動信号の出力が開始されたときに、エンジン14が前記第一アイドリング回転数で回転するようにモータ71を駆動し、
主変速レバー65が前記苗継ぎ位置にある状態で、キースイッチ66による前記始動信号の出力が開始され、その後、主変速レバー65が前記苗継ぎ位置とは異なる前記変速位置に操作されて、その後、主変速レバー65が前記苗継ぎ位置に操作されたときに、エンジン14が前記第二アイドリング回転数で回転するようにモータ71を駆動する。
しかし、一般的な田植機は、前記変速ペダルが踏み込み操作されるとき、前記アクチュエータの駆動量を常に一定に増減する。すなわち一般的な田植機においては、変速ペダルの踏み込み量の変化に対する前記アクチュエータの目標駆動量の変化の割合が常に一定値(同じ値)になるように構成されている。これにより、作業者が変速ペダルの踏み込み操作により田植機を加減速する際に、きめ細かい増減速制御が行えず、変速フィーリングが低下する点で不利である。
前記エンジンの回転数の変更を行うためのアクチュエータと、
前記アクチュエータの駆動量を検出するアクチュエータ駆動量検出装置と、
前記アクチュエータを操作するための変速ペダルと、
前記変速ペダルの踏み込み量を検出して、前記踏み込み量を示すペダル信号を出力するペダル操作量検出装置と、を備え、
前記ペダル操作量検出装置が出力するペダル信号に基づいて前記アクチュエータの目標駆動量を算出して、前記アクチュエータ駆動量検出装置の検出値が前記目標駆動量になるように前記アクチュエータを駆動して、車速を前記アクチュエータの目標駆動量に対応した大きさに変更する、
田植機であって、
前記変速ペダルの操作範囲を複数の変速領域に分割して、
前記複数の変速領域毎に、前記変速ペダルの踏み込み量の変化に対する前記アクチュエータの目標駆動量の変化の割合を設定する。
回動角β1は、変速ペダル67が踏み込み操作されていないときの、ペダル用ポテンショメータ67aの検出軸の回動角である。
回動角βmaxは、変速ペダル67が限界まで踏み込まれたときの、ペダル用ポテンショメータ67aの検出軸の回動角である。
前記マップの接続領域(β2)においては、モータ用ポテンショメータ71aの回動角γは一定値(γ2)に保持される。
前記マップの変速領域(β2より大きくβ3未満)においては、モータ用ポテンショメータ71aの回動角γは、ペダル用ポテンショメータ67aの回動角βの増加に伴って、回動角β2に対応するγ2から、回動角β3に対応するγmaxまで増加する。
前記マップの最高速保持領域(β3以上βmax以下)においては、モータ用ポテンショメータ71aの回動角γは一定値(γmax)に保持される。
なお、上記第一変速領域に関して、変速ペダル67の踏み込み量の変化に対するモータ71の目標駆動量の変化の割合(回動角βの変化に対する回動角γの変化の割合)(X1)は、一定値(γ21-γ2)/(β21-β2)、となる。
なお、上記第二変速領域に関して、回動角βの変化に対する回動角γの変化の割合(X2)は、一定値(γ22-γ21)/(β22-β21)、となる。
なお、上記第三変速領域に関して、回動角βの変化に対する回動角γの変化の割合(X3)は、一定値(γ23-γ22)/(β23-β22)、となる。
なお、上記第四変速領域に関して、回動角βの変化に対する回動角γの変化の割合(X4)は、一定値(γmax-γ23)/(β3-β23)、となる。
上記(X1)~(X4)の大小関係について、本実施形態では、(X2)<(X1)<(X3)<(X4)、となるように構成されている。
そして、制御装置100は、モータ用ポテンショメータ71aの検出軸の回動角が前記目標駆動量になるようにモータ71を駆動する。
制御装置100は、モータ71を駆動することにより、エンジン14の回転数の変更、HMT21の変速比の変更、クラッチ21cの断接の切り換え、および制動装置21dの動作の切り換えを行う。
エンジン14の回転数の変更、HMT21の変速比の変更等が行われることにより、田植機1の車速が変化して加減速が行われる。
例えば、図10(b)の矢印Aに示すように、ペダル用ポテンショメータ67aの回動角βが第三変速領域内の回動角βaから第四変速領域内の回動角βbまで一気に増加するとき、モータ71の目標駆動量(モータ用ポテンショメータ71aの回動角γ)が、回動角βの増加に比例して、回動角βaに対応するγaから、回動角βbに対応するγbまで増加する。
したがって、図10(b)に示すように、前記マップの変速領域(β2より大きくβ3未満)においては、領域Zがモータ71追従時の移動範囲に構成される。
なお、説明の便宜上、主変速レバー65は植付位置に操作されていることとする。
また、田植機1の変速ペダル67が、以下の(1)~(5)の順序で踏み込み操作されることとする。
また、図10(b)の矢印Bに示すように、変速ペダル67に関しては、第一変速領域から第四変速領域に一気に踏み込み操作され、ペダル用ポテンショメータ67aの回動角βがβ2からβ3まで一気に増加するように操作されることとする(上記(v)参照)。
また、この場合、リンク機構を介して制動装置21dが作動する。これによって、前車輪12および後車輪13が制動され、田植機1が不意に前進または後進するのを防止することができる。
また、この場合、リンク機構を介してHST21aの可動斜板の傾斜角度が最大となるように設定される。これによって、エンジン14からの動力とHST21aからの動力が遊星歯車機構21bによって互いに打ち消すように合成され、主変速機構22へ動力が伝達されることがない。
同様に、モータ用ポテンショメータ71aの回動角γがγ1に保持されている場合、制動装置21dが作動した状態に維持される。
同様に、モータ用ポテンショメータ71aの回動角γがγ1に保持されている場合、HST21aの可動斜板の傾斜角度が最大のまま維持される。
同様に、モータ用ポテンショメータ71aの回動角γがγ2になると、制動装置21dが解除される。これによって、前車輪12および後車輪13の制動が解除され、田植機1が前進または後進可能となる。
そして、田植機1は加速して、その車速Vが、モータ用ポテンショメータ71aの回動角γ2に対応する0から、回動角γmaxに対応するVmaxまで増加する。このとき、図10(b)の矢印Bに示すように、制御装置100は、回動角βの変化に対する回動角γの変化の割合が一定値(γmax-γ2)/(β3-β2)、になるようにモータ71を駆動する。これにより、田植機1はスムーズに加速することが可能となる。
したがって、エンジン14の回転数NはNmaxのまま、田植機1の車速VはVmaxのまま、それぞれ維持される。このようにして、変速ペダル67の踏み込み操作に対して田植機1が加減速しない領域(いわゆる「余裕代」)が設けられる(図7参照)。
これにより、田植機1の加速度に関して、変速ペダル67が第四変速領域(β23以上β3未満)内で踏み込み操作されるときが一番大きく(上記(iv)参照)、変速ペダル67が第三変速領域(β22以上β23未満)内で踏み込み操作されるときが二番目に大きく(上記(iv)参照)、変速ペダル67が第一変速領域(β2より大きくβ21未満)内で踏み込み操作されるときが三番目に大きく(上記(i)参照)、変速ペダル67が第二変速領域(β21以上β22未満)内で踏み込み操作されるときが四番目に大きい(上記(ii)参照)。
また、田植機1は、上記変速領域を複数の変速領域に分割して、分割した変速領域毎に変化割合を設定する。これにより、植付条件や圃場条件や作業者の好み等に応じて変化割合を変更する場合、上記変化割合を全体的に変更する必要がなく、該当する変速領域においての変化割合を所望の値に変更すればよい。これにより変化割合の変更を容易に行うことができる。また、各変速領域では変化割合がそれぞれ一定(X1)~(X4)であるため、速度固定レバー70により速度固定を行う場合に走行速度を所望の速さに近づけることが容易に行え、所望の走行速度での速度固定がし易くなる。
エンジン14と、
エンジン14の回転数の変更を行うためのモータ71と、
モータ71を操作するための変速ペダル67と、
を備え、
変速ペダル67の操作量に基づいてモータ71の目標駆動量を算出して、前記目標駆動量になるようにモータ71を駆動して、車速をモータ71の目標駆動量に対応した大きさに変更し、
変速ペダル67の操作範囲を第一変速領域~第四変速領域に分割して、
第一変速領域~第四変速領域毎に、変速ペダル67の踏み込み量の変化に対するモータ71の目標駆動量の変化の割合(X1)~(X4)を設定する。
変速ペダル67が、第一変速領域~第四変速領域のうちの、一の変速領域から他の変速領域に一気に踏み込み操作されるときには、変速ペダル67の踏み込み量の変化に対するモータ71の目標駆動量の変化の割合を一定値に設定する。
Claims (7)
- エンジンと、
前記エンジンの動力を変速して車輪に伝達する変速機と、
前記変速機に接続され、苗継ぎ位置を含む複数の変速位置に操作可能であり、前記変速位置に操作されるときに、操作された変速位置に対応するように前記変速機の変速段を変更する主変速レバーと、
前記エンジンの回転数の変更を行うためのアクチュエータと、
前記アクチュエータを操作するための変速操作具と、
を備え、
前記主変速レバーが前記苗継ぎ位置にない場合で、前記変速操作具が操作されていないときに、前記エンジンが第一アイドリング回転数で回転するように前記アクチュエータを駆動し、
前記主変速レバーが前記苗継ぎ位置にある場合に、前記エンジンが前記第一アイドリング回転数よりも低い回転数である第二アイドリング回転数で回転するように前記アクチュエータを駆動する、
田植機。 - 前記第一アイドリング回転数は、前記田植機を発進させる際に即応可能な回転数であり、
前記第二アイドリング回転数は、前記エンジンが停止しない回転数である、
請求項1に記載の田植機。 - 前記田植機は、前記エンジンを始動させるための操作具であり、前記エンジンを始動させるための始動操作が行われるときに始動信号を出力する始動装置を備え、
前記主変速レバーが前記苗継ぎ位置にあり、かつ、前記変速操作具が操作されていない状態で、前記始動装置による前記始動信号の出力が開始されたときに、前記エンジンが前記第一アイドリング回転数で回転するように前記アクチュエータを駆動し、
前記主変速レバーが前記苗継ぎ位置にある状態で、前記始動装置による前記始動信号の出力が開始され、その後、前記主変速レバーが前記苗継ぎ位置とは異なる前記変速位置に操作されて、その後、前記主変速レバーが前記苗継ぎ位置に操作されたときに、前記エンジンが前記第二アイドリング回転数で回転するように前記アクチュエータを駆動する、
請求項1または請求項2に記載の田植機。 - 前記変速操作具の操作量に基づいて前記アクチュエータの目標駆動量を算出して、前記目標駆動量になるように前記アクチュエータを駆動して、車速を前記アクチュエータの目標駆動量に対応した大きさに変更し、
前記変速操作具の操作範囲を複数の変速領域に分割して、
前記複数の変速領域毎に、前記変速操作具の操作量の変化に対する前記アクチュエータの目標駆動量の変化の割合を設定する、
請求項1~請求項3のいずれか一項に記載の田植機。 - 前記変速操作具が、前記複数の変速領域のうちの、一の変速領域から他の変速領域に一気に踏み込み操作されるときには、前記変速操作具の操作量の変化に対する前記アクチュエータの目標駆動量の変化の割合を一定値に設定する、
請求項4に記載の田植機。 - エンジンと、
前記エンジンの回転数の変更を行うためのアクチュエータと、
前記アクチュエータを操作するための変速操作具と、
を備え、
前記変速操作具の操作量に基づいて前記アクチュエータの目標駆動量を算出して、前記目標駆動量になるように前記アクチュエータを駆動して、車速を前記アクチュエータの目標駆動量に対応した大きさに変更し、
前記変速操作具の操作範囲を複数の変速領域に分割して、
前記複数の変速領域毎に、前記変速操作具の操作量の変化に対する前記アクチュエータの目標駆動量の変化の割合を設定する、
田植機。 - 前記変速操作具が、前記複数の変速領域のうちの、一の変速領域から他の変速領域に一気に踏み込み操作されるときには、前記変速操作具の操作量の変化に対する前記アクチュエータの目標駆動量の変化の割合を一定値に設定する、
請求項6に記載の田植機。
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JPH068833A (ja) * | 1992-06-26 | 1994-01-18 | Yanmar Agricult Equip Co Ltd | 農作業車のパワーステアリング機構配設構造 |
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