KR20100124722A - Riding-type rice transplanter - Google Patents

Abstract

The rice transplanter has a traveling body 2 having traveling wheels 5 and 6 driven by the engine 7, a seedling device 3 mounted to the rear part of the traveling body 2, and traveling wheels 5 and 6; And a shift pedal 12 provided on the driving operation unit 9 of the traveling body. The riding type rice transplanter is further provided with an actuator 28 for shifting the traveling shift mission and a detection means 24 for detecting the stepping operation and the stepping release operation of the shift pedal 12. Actuator 28 travels when the detection means 24 detects the stepping operation of the shift pedal, and operates the drive shift mission 8 (14) at a higher speed. When the detection means detects the stepping release operation of the shift pedal 12, the driving means travels. Start the transmission mission [8 (14)] with deceleration.

Description

Rider-type rice transplanter {RIDING-TYPE RICE TRANSPLANTER}

The present invention relates to a passenger type rice transplanter formed by attaching a planting device to a rear portion or a front portion of a traveling body. More specifically, the present invention relates to a riding type rice transplanter, wherein the change of the traveling speed is performed by a foot pedal.

In the case of a car such as a car or a truck, the vehicle speed is generally changed by adjusting the fuel injection amount. However, since the rice transplanter engine not only drives but also drives the planting device, it is not desirable to change the engine output too much. Therefore, the vehicle speed is changed by controlling the traveling shift mission.

For example, Patent Document 1 discloses mechanically interlocking connection between a shift lever in a traveling shift mission and a stepped pedal provided in a driving operation unit by a rod or the like. In this patent document, when the shift pedal is pressed, the shift mission is in a speed increasing state, and when the pedal is released (when the shift pedal is moved back), the shift mission is in a deceleration state.

Japanese Patent Publication No. 2003-220933

When the vehicle speed is changed with a foot pedal as in Patent Literature 1, both hands are free, and thus the handle operation and various levers are easier to operate than when the vehicle speed is adjusted by a manual lever, thereby providing excellent safety.

However, in Patent Document 1, since the shift pedal is mechanically connected to the shift lever of the traveling shift mission by a rod or the like, the movement of the shift pedal is immediately transmitted to the traveling shift mission so that the traveling body is suddenly started or suddenly accelerated by stepping on the shift pedal. In addition, there has been a concern that the traveling body suddenly decelerates or suddenly stops by depressing the shift pedal. That is, there was concern that the response followability of the movement of the traveling transmission mission to the movement of the shift pedal is too sensitive.

In addition, when the traveling gas suddenly starts or accelerates, the front portion of the traveling body is lifted up, and the seedling device of the rear portion is lowered, which causes a problem that the seeding depth of the seedling on the pavement surface is too deeper than a predetermined value. If you decelerate or stop quickly, the vehicle will fall off to the side, making it easier to meander.

Moreover, in the structure which transmits the movement of a shift pedal to a traveling shift mission as a rod like patent document 1, when the resistance of the shift lever in a traveling shift mission acts as a resistance to the movement of a shift pedal, it has a great force to press a shift pedal. Also, there is a problem that it is necessary to deteriorate the shift operability and the driving operation feeling due to a so-called kickback phenomenon in which an impact or a load when operating the shift lever is transmitted to the shift pedal.

An object of this invention is to solve the problem regarding these shifts in a riding type rice transplanter.

The present invention has multifaceted expansion. The first aspect of the invention is the configuration of the highest concept, and has a running body on which an engine is mounted, a driving device mounted on the rear portion of the traveling body so as to be adjustable in height, and the driving body having a seat; In the traveling gear mission, which is provided with a traveling wheel, a traveling shift mission for shifting and transmitting the power of the engine to the traveling wheel, and a stepping pedal for changing a traveling speed, Control is performed by a powered actuator that operates in response to the movement of the pedal.

According to a second aspect of the present invention, there are provided detection means for detecting a stepping movement and a return movement of the shift pedal as an electric signal, and the detection means and the actuator detect the stepping movement of the shift pedal by the detection means. When the actuator accelerates the traveling shift mission, and the detection means detects the return movement of the shift pedal, the actuator is interlocked so as to slow down the traveling shift mission.

In the third invention, in the second invention, the detection means can detect the movement amount per unit time of the shift pedal, while the actuator can control the traveling shift mission to adjust the vehicle speed change per unit time, and the detection Between the means and the actuator, there is interposed a controller that can adjust the relationship between the shift amount of the shift pedal per unit time and the rate of change of the vehicle speed.

In 4th invention, in the 1st-3rd invention, an electric motor is employ | adopted as said actuator.

5th invention is a subordinate concept of 1st-4th invention, The brake mechanism which adds resistance to the rotation of the said driving wheel in addition to the 1st-4th invention, and connects the output of the said traveling transmission mission to the said running wheel. A clutch mechanism to cut off, and one actuating member for switching the brake mechanism and the clutch mechanism at the same time, wherein the actuating member includes a travel stop state in which the brake mechanism is turned on and the clutch mechanism is turned off; It is possible to switch to the running state by turning the brake mechanism OFF and the clutch mechanism ON. In the fifth aspect of the present invention, the operating member and the shift pedal are interlocked as if the operating member is in a stopped state when the shift pedal is not depressed, and the operating member is in a running state when the pedal is depressed. have.

In a sixth invention, in the fifth invention, a driving pedal of the traveling body is provided with a foot pedal. The brake pedal and the operation member are provided with the shift pedal when the brake pedal is stepped on. It is interlocking so that the relationship is interrupted and stopped.

(Effects of the Invention)

In the first invention, since the movement of the shift pedal is transmitted to the traveling shift mission through the power actuator, the traveling shift mission can be prevented from responding sensitively to the movement of the shift pedal. Therefore, sudden start and stop of the shift pedal can be prevented, and as a result, the traveling body can be prevented from inclining forward, thereby preventing or remarkably suppressing the seedlings from being deeply implanted. In addition, since sudden stop and sudden deceleration due to the return movement of the shift pedal can be prevented, it is also possible to prevent or remarkably reduce the running gas from sideways.

In addition, since the load and the impact at the time of the shift lever shift operation in the traveling shift mission are not transmitted to the shift pedal as so-called kickback, the shift operability and driving sensation can be significantly improved.

The movement of the shift pedal can be transmitted to the actuator by a mechanical mechanism, but it is advantageous in terms of design because the interlocking member is unnecessary when employing the electrical detection means as in the second invention.

In the third aspect of the invention, for example, the speed is slowed at the initial stage (starting time) of the pedal operation, or the deceleration speed is decreased at the end (stopping) of the pedal release operation. Since it becomes possible to make a smoothness, the speed change of a traveling body can be made smooth, and a traveling vehicle can be made to run stably, and as a result, the effect of preventing the deep implantation and the meandering off sideways is further enhanced. It can encourage.

As the actuator, various kinds such as a hydraulic motor and an electronic solenoid can be used. However, if the electric motor (preferably a stepping motor) is employed as in the fourth invention, a simple structure and complicated control are possible. Therefore, 4th invention is a suitable form in this invention.

According to the fifth aspect of the invention, when the operator releases the shift pedal, the clutch mechanism is turned off, the power transmission to the driving wheel is stopped, and the brake mechanism is turned on, and the rotation of the driving wheel is stopped. In addition, it is reliably performed and for this reason, the operability of a rice transplanter can be improved.

At the time of planting work, there is a case where it is necessary to stop quickly on the package due to safety. According to the sixth aspect of the present invention, when the brake pedal is pressed, the traveling body suddenly stops prior to the operation of the shift pedal, so that the operability can be further improved.

1 is a side view of a riding type rice transplanter to which the present invention is applied.
2 is a plan view of FIG. 1.
3 is a schematic diagram of a traveling transmission mission.
4 is a plan view of the traveling control device.
5 is an enlarged cross-sectional view taken along line VV of FIG. 4.
6 is an enlarged cross-sectional view taken along the line VI-VI of FIG. 4.
7 is an enlarged view illustrating main parts of FIG. 4.
8 is a diagram illustrating a relationship between a shift amount of a shift pedal and a change rate of a traveling speed.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing.

1 and 2, reference numeral 1 denotes a riding type rice transplanter. This riding type rice transplanter 1 consists of a traveling body 2 and the conventional well-known multi-row planting apparatus 3 attached to this rear part so that lifting and lowering is possible, The said traveling body 2 Like the left and right pair of front wheels 5, the vehicle body frame 4 supported by the left and right pair of rear wheels 6 is provided.

In addition, the engine body 7 is mounted on the vehicle body frame 4 of the traveling body 2, and the driving speed shifting power is appropriately shifted from the engine 7 to the front and rear wheels 5 and 6. The mission 8 is mounted, whereby the traveling body 2 travels forward in the direction of arrow A by four-wheel drive.

Moreover, the driving operation part 9 provided with the steering wheel 10 and the seat 11 is provided in the upper surface of the vehicle body frame 4 in the said traveling body 2, and in this driving operation part 9 On the right side of the steering wheel 10 of the bottom surface, the shift pedal (accelerator pedal) 12 of stepping in the forward direction and the brake pedal 13 of stepping in the front direction are similarly side by side It is installed. These pedals 12 and 13 are rotatably mounted to the vehicle body frame 4.

As shown in FIG. 3, the traveling transmission mission 8 includes a continuously variable transmission mechanism 14 of an HST type (hydrostatic type). The HST-type continuously variable transmission mechanism 14 includes a variable hydraulic pump 15 driven by power from the engine 7 and a hydraulic motor 16 driven by hydraulic pressure from the hydraulic pump 15. The traveling speed of the traveling body 2 is continuously changed by changing the inclination angle of the inclined plate 15a in the hydraulic pump 15 to the shift lever 17. Although not shown, a spring means for biasing the shift lever 17 in the deceleration direction is connected to the shift lever 17.

In addition, as shown in FIG. 3, the traveling shift mission 8 is provided with a clutch mechanism 18 for turning on and off the power transmission to the wheels 5 and 6. A brake mechanism 19 for braking the wheels 5 and 6 is provided.

In addition, a rotary operation shaft 20 with respect to the brake mechanism 19 is provided on the traveling transmission mission 8, and the clutch mechanism (1) is provided on one operation member 21 fixed to the operation shaft 20. 18) is connected by a wire or the like. Thereby, although the said one operation member 21 is in the stop state which the said brake mechanism 19 is ON and the said clutch mechanism 18 is OFF when it is in the position shown by the solid line in FIG. 4 and FIG. 7, It is comprised so that the said brake mechanism 19 will turn OFF and the clutch mechanism 18 will be in the running state when it rotates to the rear direction shown by the arrow B in FIG. On this one operating member 21 or the operation shaft 20, spring means (not shown) for biasing the operating member 21 to rotate in the direction of the arrow B is provided.

In the part of the front part of the said vehicle body frame 4, the shift operation shaft 22 extended in the horizontal direction (left-right direction when viewed from the front of the traveling body 2) is axially rotatably supported by the bearing 23, On the right end of the shift operation shaft 22, a detection means 24 for detecting the stepping operation and the step release operation (described later in detail) of the shift pedal 12 is provided. The sector gear 25 is fixed to the left end of 22.

Further, an arm 26 is fixed to the shift operation shaft 22, and a front end of the shift rod lever 27 extending rearward is pivotally mounted to the tip of the arm 26. As shown in FIG. Moreover, the long groove hole 27a of suitable length L is formed in the rear end of this speed change rod lever 27, and the continuously variable transmission mechanism 14 of the said traveling transmission mission 8 is formed in this long groove hole 27a. The pin 17a provided at the tip of the shift lever 17 in () is slidably engaged.

Accordingly, the continuously variable transmission mechanism 14 is in a state in which power is hardly transmitted in a state in which the shift operation shaft 22 does not rotate and the shift rod lever 27 does not move backward, but the shift operation shaft ( 22 is rotated in the counterclockwise direction indicated by the arrow C in FIGS. 5 and 6 so that the shift rod lever 27 moves backward, and the amount of movement exceeds the length L of the long groove hole 27a. From the viewpoint, the traveling speed is increased steplessly in proportion to the movement of the shift rod lever 27 to the rear. On the other hand, if the shift operation shaft 22 is rotated in the clockwise direction indicated by arrow D in Figs. 5 and 6 and the shift rod lever 27 moves forward, the continuously variable transmission mechanism 14 changes to deceleration, and the traveling speed Decelerates steplessly.

The sector gear 25 is engaged with a pinion 29 which is rotationally driven by an electric actuator (for example, an electric motor) 28. Accordingly, by forward and reverse rotation of the sector gear 25 with the electric actuator 28, the shift operation shaft 22 is rotated forward and backward in the counterclockwise direction indicated by the arrow C and clockwise indicated by the arrow D. FIG.

On the right end of the shift operation shaft 22, a shift pedal shaft 30 extending in parallel with the shift operation shaft 22 is rotatably supported (the shift pedal shaft 30 is a vehicle body frame ( 4). This shift pedal shaft 30 is interlocked with the shift pedal 12 via an interlock mechanism 31, and resists the spring pedal from a standing position of the shift pedal 12 by a spring means (not shown). When the pedal is pressed down (stepping down), the shift pedal shaft 30 rotates clockwise as indicated by the arrow E. FIG. On the contrary, when the step release operation of returning the shift pedal 12 from the stepped position to the original standing position by the spring means is made, the shift pedal shaft 30 rotates in the counterclockwise direction indicated by the arrow F. FIG.

The detection means 24 disposed at the right end of the shift operation shaft 22 includes a box 24a fixed to the shift operation shaft 22 and a rotor rotatably provided at the box 24a. 24b, a two-pronged arm 24c protruding radially outward from the rotor 24b, and a pair of switches provided on both sides of the two-pronged arm 24c in the box 24a. 24d, 24e). The tip of the arm 32 protruding from the shifting pedal shaft 30 is engaged with the two-pronged arm 24c. Therefore, the two-pronged arm 24c and the rotor 24b are connected to the shifting pedal 12. It rotates in the counterclockwise direction shown by arrow E 'by stepping operation in (). Then, one switch 24d is switched from OFF to ON. On the contrary, when the shift pedal 12 is depressed from the stepped state, the two-arm arm 24c and the rotor 24b rotate clockwise as indicated by the arrow F ', and the other switch 24e is rotated. Switch from OFF to ON.

Reference numeral 33 in Fig. 4 is a controller. The controller 33 uses signals from both switches 24d and 24e of the detection means 24 as input signals, and changes the input signals as appropriate to output an instruction to the electric actuator 28. When one of the switches 24d and 24e of the two switches 24d is turned from OFF to ON, the electric actuator 28 is driven so that the shift operation shaft 22 moves through the sector gear 25. The shift rod lever 27 moves backward as shown by the solid arrow G in FIGS. 4, 6, and 7 by rotating in the direction. On the contrary, when the other switch 24e of the two switches 24d and 24e is turned from OFF to ON, as shown by the dotted arrow H in FIGS. 4, 6 and 7, the shift rod lever 27 is moved forward. Go to.

As shown in FIG. 7, the receiving piece 21a is integrally provided in the one operation member 21 with respect to both the said clutch mechanism 18 and the brake mechanism 19, and this accommodation piece 21a is mentioned above. The shift rod lever 27 is slidably penetrated. A stopper piece 27b in contact with the housing piece 21a is provided at the rear end of the shift rod lever 27. For this reason, when the shift operation shaft 22 does not rotate and the shift rod lever 27 does not move backward (that is, when the shift pedal 12 is not stepped on), the One operation member 21 is held in the stopped state by turning on the brake mechanism 19 and turning off the clutch mechanism 18 by the stopper piece 27b. When the shifting rod lever 27 moves backward, the one actuating member 21 resists the spring means and rotates to the rear of the arrow B as indicated by the dashed-dotted line in FIG. 19 is OFF and the clutch mechanism 18 is in a running state.

The brake pedal 13 provided in the shift pedal 12 is connected to a brake shaft 34 rotatably supported by the vehicle body frame 4, and is braked by stepping on the brake pedal 13. 34 rotates. An arm 35 is fixed to the brake shaft 34, and a brake rod lever 36 extending rearward is connected to the tip of the arm 35, and as shown in FIG. 7, the brake rod lever 36 is shown. A portion of the rear end in the slide slidably penetrates the locking piece 21b provided on the one operation member 21, and a stopper 36a is provided at the rear end of the brake rod lever 36. As shown in FIG. Accordingly, in the state where the brake pedal 13 is not stepped on, the stop state (the position indicated by the solid line in FIG. 7) in the one operating member 21 is the running state (the position indicated by the dashed-dotted line in FIG. 7). Is allowed to operate freely, but if the brake pedal 13 is stepped against the spring when the one operation member 21 is in the running state, regardless of the shifting rod lever 27, The one operating member 21 can be forcibly stopped. In other words, prior to the operation of the shift pedal 12, the stop state can be forced.

In the above configuration, when the shift pedal 12 is not stepped on, the shift operation shaft 22 does not rotate, and the shift rod lever 27 also does not move rearward. The shift lever 17 in the HST-type continuously variable transmission mechanism 14 does not rotate.

When the shift pedal 12 is not stepped on, the one operation member 21 is at a stop position shown, for example, by a solid line in FIG. 7, and the brake mechanism 19 is ON and the clutch mechanism 18 is turned on. The traveling body 2 does not travel because the power transmission shutoff state is set to OFF.

Subsequently, when the shift pedal 12 is pressed down, the shift pedal shaft 30 first rotates in the direction indicated by the arrow E in FIG. 5, and based on this rotation, the bifurcated shape in the detection means 24 is performed. When the arm 24c and the rotor 24b rotate in the direction of the arrow E ', one of the switches 24d and 24e of the detection means 24 switches the switch 24d from OFF to ON. By this, the electric actuator 28 rotates the shift operation shaft 22 in the direction of the arrow C at the instruction of the controller 33. As a result, the shift rod lever 27 starts to move rearward, for example, as indicated by the solid line arrow G in FIG. 6.

When the initial movement amount to the rear of the shift rod lever 27 is the length L of the long groove hole 27a at the rear end thereof, the stopper 27b is a receiving piece in the one operation member 21. By moving away from the back 21a, the one operating member 21 rotates in the running state indicated by the two-dot chain line, whereby the brake mechanism 19 is OFF and the power transmission state in which the clutch mechanism 18 is ON. It becomes

The rearward movement of the shifting rod lever 27 is continued by the continuation of the stepping operation of the shifting pedal 12, and the shifting at the stage in which the rearward movement exceeds the length L of the elongated groove hole 27a. The lever 17 rotates rearward, and the HST-type continuously variable transmission mechanism 14 operates in a power transmission state. As a result, the traveling body 2 starts to travel. The traveling speed of the traveling body 2 is performed in proportion to the amount of the shift rod lever 27 being moved further rearward (that is, the amount of stepping operation of the shift pedal 12).

When the stepping operation of the shift pedal 12 is stopped, rotation is continued by the controller 33 in the direction of an arrow C of the shift operation shaft 22 by the electric actuator 28, thereby detecting the detection means 24. One switch 24d in the switch is turned from ON to OFF, and rotation is stopped in the direction of the arrow C of the shift operation shaft 22 by the electric actuator 28 by the instruction of the controller 33. As a result, the rearward movement of the shift rod lever 27 stops at that position. Therefore, the traveling speed of the traveling body 2 is maintained at a speed corresponding to the stepping position of the shift pedal 12.

When the stepping release operation of releasing the foot from the shift pedal 12 and stepping on the shift pedal 12 to return to the original standing position by the spring means is performed, the shift pedal shaft 30 is indicated by an arrow F. FIG. In the direction of, and the two-armed arm 24c and the rotor 24b of the detection means 24 rotate in the direction of the arrow F 'based on this rotation. Then, the other switch 24e of the two switches 24d and 24e in the detection means 24 is switched from OFF to ON, so that the electric actuator 28 is instructed by the controller 33. The shift operation shaft 22 is driven to rotate in the direction of the arrow D. FIG. As a result, the shift rod lever 27 moves forward as indicated by the dashed arrow H. FIG.

The shift lever 17 rotates backward by the forward movement of the shift rod lever 27 so that the HST-type continuously variable transmission mechanism 14 operates in a decelerated state, so that the traveling speed of the traveling body 2 decreases. do.

When the stepping release operation of the shift pedal 12 is stopped halfway, the detection means by stopping the rotation of the arm 32 while the shift operation shaft 22 is rotating in the direction of the arrow D by the electric actuator 28. The other switch 24e in (24) is turned from ON to OFF. Then, the electric actuator 28 is stopped by the instruction of the controller 33, and then the direction of the shift operation shaft 22 in the direction of the arrow D is changed. The rotation stops. As a result, the movement forward of the shift rod lever 27 stops at that position, and the traveling speed is kept in a decelerated state.

When the shift pedal 12 completely returns to its original standing position by the spring means, the shift lever 17 also returns to its original state, and the HST-type continuously variable transmission mechanism 14 hardly transmits power. The one operating member 21 is in a stop state in which the brake mechanism 19 is ON and the clutch mechanism 18 is OFF, whereby the traveling of the traveling body 2 is stopped.

In this way, the oscillation and acceleration by stepping on the shift pedal 12 are carried out to the actuator 28 through the detection means 24 and the controller 33 for detecting the step of the shift pedal 12. 8) is operated by increasing the speed, while traveling gear shifting mission (8) to the actuator (28) via the deceleration and stopping degree detecting means (24) and the controller (33) by depressing the shift pedal (12). Is operated by deceleration, and since the detection means 24 and the actuator 28 exist between the shift pedal 12 and the traveling shift mission 8, It is possible to avoid sudden deceleration or sudden stop due to rapid acceleration or sudden start or sudden return of the shift pedal 12.

In addition, since the traveling shift mission 8 is shifted by the actuator 28, the stepping force of the shift pedal 12 can be reduced, and the traveling shift mission when the shift pedal 12 is operated. The load and the impact of the shift lever 17 in (8) can be avoided from being transmitted to the shift pedal 12 as so-called kickback.

By the way, in this embodiment, as shown in FIG. 8, the said controller 33 is equipped with the function which can change the unit speed change of the traveling speed with respect to the unit operation amount of the said shift pedal 12. As shown in FIG. That is, FIG. 8 is a diagram showing the relationship between the operation amount S of the shift pedal 12 and the shift amount W of the traveling speed, and the relationship is represented by the first straight line X represented by the solid line or by the two-dot chain line. It can be set as the downwardly convex quadratic curve Y shown.

In the relationship of the primary straight line X shown by the solid line of FIG. 8, the unit shift amount (DELTA) W of the traveling speed with respect to the unit operation amount (DELTA) S of the said shift pedal 12 is set to be linearly proportionate over the whole area | region Under the relationship of the downwardly convex quadratic curve Y represented by the two-dot chain line, the unit shift amount of the traveling speed with respect to the unit operation amount ΔS of the shift pedal 12 is smaller than the relationship of X over the entire area. In the initial stage of the stepping operation of the shift pedal 12, it is set to become the smallest and gradually larger.

The stepping displacement amount of the shift pedal 12 can be calculated by measuring the time when one switch 24d of the detection means 24 is turned ON. In addition, the return displacement amount of the shift pedal 12 can be calculated by measuring the time when the other switch 24e in the detection means 24 is turned ON. The detection means 24 may have a sensor function of directly detecting the displacement amount (displacement angle) of the shift pedal 12. The relationship between X and Y can also be realized by a cam.

By setting in relation to Y, the rate of increase of the traveling speed is moderate in the initial stage (when oscillation) of the stepping operation of the shift pedal 12, and at the end of the stepping release operation of the shift pedal 12 (when stopping). Since the deceleration rate of traveling speed can be made gentle, the effect of preventing the deep implantation at the start of oscillation and the meandering off the side at the time of stopping is further promoted.

Further, when setting the relationship between the operation amount S of the shift pedal 12 and the shift amount W of the traveling speed by the controller 33, the primary straight line X or the downwardly convex secondary curve ( Y, in addition to changing the inclination of the primary straight line X, changing the shape of the downwardly convex secondary curve Y, or the upwardly convex secondary curve, the shift pedal It can be set so that it becomes another 1st linear line or a 2nd curve at the time of tread operation (at oscillation) and at the time of tread release operation (stop) of (12).

In this embodiment, the drive rotation speed of the engine 7 is automatically changed in accordance with the shifting operation of the traveling transmission mission 8, which is illustrated in FIG. 6.

That is, first, as shown in Fig. 6, the sector gear 25 is formed with a cam groove 37 extending in the circumferential direction. Is located at a portion of a large radius R1 from the shift operating shaft 22, which is the center of rotation, and a terminal (other end) 37b is located at a portion of a small radius R2 from the shift operating shaft 22, Therefore, the cam groove 37 is inclined so as to gradually approach the center of rotation toward the direction of rotation of the sector gear 25 in the direction of arrow C (that is, the direction of rotation for increasing the running speed).

The front end of the first arm 39 projecting from the horizontal axis 38 rotatably axially supported by the vehicle body frame 4 to the cam groove 37 is slidably engaged, and is fixed to the horizontal axis 38. The second arm 40 and the accelerator lever 7a of the engine 7 are connected by a wire 41 or the like.

In this configuration, when the sector gear 25 is rotated in the direction of the arrow C (direction for increasing the running speed), the accelerator lever 7a is resisted by the return spring means 7b in the cam groove 37. Since the engine rotates in the direction indicated by the arrow J, the rotation speed of the engine 7 is automatically increased in proportion to the increase in the running speed from the idle rotation.

On the other hand, when the sector gear 25 is rotated in the direction of the arrow D (direction for reducing the running speed), the accelerator lever 7a is guided by the cam groove 37 by the return spring means 7b. The motor rotates back in the direction indicated by the arrow K. For this reason, the rotation speed of the engine 7 is automatically decelerated in proportion to the deceleration of the traveling speed.

Moreover, of course, the rotation speed of the said engine 7 is comprised so that it may be changed arbitrarily also by rotating the said accelerator lever 7a manually.

Industrial availability

The present invention can be applied to a passenger-type rice transplanter to improve its usefulness, and thus has industrial applicability.

1: passenger rice transplanter 2: traveling aircraft
3: planting device 4: body frame
5: front wheel (driving wheel) 6: rear wheel (driving wheel)
7: engine 8: driving shift mission
9: driving control unit 12: shift pedal
13: brake pedal
14: HST-type continuously variable transmission mechanism as the backbone of the traveling transmission mission
17: shift lever 18: clutch mechanism
19: brake mechanism 21: operating member
22: shift operation shaft 24: detection means (sensor)
25: shifting sector gear 27: shifting rod lever
28: actuator (electric motor) 33: controller

Claims (6)

A traveling body on which an engine is mounted, and a planting apparatus mounted on the rear portion or front side of the traveling body so that height adjustment is possible;
The traveling body is provided with a driving operation unit having a seat, a traveling wheel, a traveling shift mission for shifting and transmitting the power of the engine to the traveling wheel, and a stepping pedal for changing a traveling speed. As a rice transplanter:
The control of the traveling shift mission is performed by a powered actuator that operates in response to the movement of the pedal. The method of claim 1,
Detecting means for detecting the stepping movement and the return movement of the shift pedal as an electric signal, and the detection means and the actuator are configured to increase the driving shift mission when the detecting means detects the stepping movement of the shift pedal. And the actuator cooperates with the actuator to decelerate the traveling shift mission when the detecting means detects the return movement of the shift pedal. The method of claim 2,
The detection means may detect the amount of movement per unit time of the shift pedal, while the actuator may control the traveling shift mission to adjust the vehicle speed change per unit time, and between the detection means and the actuator per unit time And a controller capable of adjusting a relationship between a shift amount of the shift pedal and a rate of change of the vehicle speed. The method according to any one of claims 1 to 3,
The actuator is a passenger type rice transplanter, characterized in that the electric motor. The method according to any one of claims 1 to 4,
A brake mechanism that provides resistance to rotation of the traveling wheel, a clutch mechanism that connects and blocks the output of the traveling transmission mission to the traveling wheel, and one operation member that simultaneously switches the brake mechanism and the clutch mechanism are further included. Equipped;
The operating member can switch to a running stop state in which the brake mechanism is turned ON and the clutch mechanism is turned OFF, and a brake state is turned OFF;
And the operating member and the shift pedal are interlocked so that the operating member is in a stopped state when the shift pedal is not pressed, and the operating member is in a running state when the shift pedal is pressed. The method of claim 5, wherein
A foot pedal-type brake pedal is provided in the driving operation unit of the traveling body, and the brake pedal and the operating member are interlocked so that the operating member blocks the relationship with the shift pedal to stop when the brake pedal is stepped on. Riding type rice transplanter, characterized in that.

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