JP2010213626A - Gearshift mechanism of rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gearshift mechanism of a rice transplanter, which can operate an operation tool at hand to change the travel speed of a travel machine frame. <P>SOLUTION: The gearshift mechanism of the rice transplanter 1 having a hydraulic continuously variable transmission 21 for changing a power from an engine 5 loaded on the travel machine frame 2, an electric motor 60 for changing the speed change ratio of the hydraulic continuously variable transmission 21, a controller 80 for controlling the driving of the electric motor 60, a gearshift tool for operating the controller 80 is characterized in that the gearshift tool includes a main speed change pedal 16 operated at the operator's feet and a main speed change dial 18 operated at the operator's hand; the main speed change pedal 16 and the main speed change dial 18 can separately singly control the driving of the electric motor 60 through the controller 80 to operate the hydraulic continuously variable transmission 21. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a rice transplanter, and more particularly to a technology of a speed change operation mechanism of a rice transplanter.

2. Description of the Related Art Conventionally, a shift operation mechanism for shifting the traveling speed of a traveling machine body provided in a rice transplanter has been publicly known (see, for example, Patent Document 1).
For example, in the speed change operation mechanism described in Patent Document 1, a hydraulic continuously variable transmission that shifts power from an engine mounted on a traveling machine body, and a transmission actuator that changes a gear ratio of the hydraulic continuously variable transmission And a controller (control device) that controls driving of the motor, a shift operation tool, and the like, and by changing the gear ratio of the continuously variable transmission by the motor based on the operation amount of the shift operation tool. The traveling speed of the traveling machine body is changed.

JP 2004-262417 A

  However, in the speed change operation mechanism described in Patent Document 1, the speed change operation tool is located below the steering handle of the driving operation unit and is a stepping pedal disposed on a step (floor surface), that is, a foot operation tool. Therefore, for example, it is difficult for a pilot with a foot problem to operate the speed change operation tool, and it is also difficult for the driver to operate the speed change operation tool in a standing position.

  The present invention has been made in view of the above-described problems, and the problem to be solved is that the operator operates the speed change operation tool not only at the foot but also at the hand, and the traveling speed of the traveling machine body is increased. A speed change mechanism of a rice transplanter capable of changing speed is provided.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, a continuously variable transmission that shifts power from an engine mounted on a traveling body, a transmission actuator that changes a transmission ratio of the continuously variable transmission, and a control that controls driving of the transmission actuator. In a speed change operation mechanism of a rice transplanter provided with a device and a speed change operation tool for operating the control device, the speed change operation tool is operated by a foot operation tool operated by a pilot's foot and a driver's hand. A hand operating tool is provided, and the foot operating tool and the hand operating tool are each capable of independently driving and controlling the speed change actuator by the control device, and allowing the speed change operation of the continuously variable transmission. is there.

  According to a second aspect of the present invention, the hand operating tool is formed by the control device so that a gear ratio of the continuously variable transmission can be set in a plurality of steps or continuously, and is disposed in a driving operation unit of the traveling machine body. It is arranged near the steering handle.

  According to a third aspect of the present invention, there is provided operation selection means for alternatively selecting the foot operation tool and the hand operation tool as an operation tool capable of shifting operation.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect of the present invention, the operator can operate the hand operation tool as the speed change operation tool to change the traveling speed of the traveling machine body. Therefore, even when the pilot cannot use his / her feet, the traveling speed of the traveling aircraft can be easily changed.

  According to the second aspect of the present invention, even when the traveling machine body is traveling, the operator can easily finely adjust the speed change operation of the continuously variable transmission without changing the maneuvering posture.

  According to the third aspect of the present invention, either the foot operating tool or the hand operating tool can be selected and used in accordance with the operator's preference when performing the speed change operation of the traveling machine body. Therefore, when working while standing, the hand operating tool can be operated, so that workability can be improved.

The side view of a rice transplanter provided with the speed change operation mechanism of the rice transplanter which concerns on one Embodiment of this invention. Similarly, a plan view. Schematic of a traveling speed change mission. Schematic which shows the operation input to a hydraulic continuously variable transmission. FIG. 5 is an enlarged sectional view taken along line VV in FIG. 4. The block diagram which shows the control structure of a control apparatus.

Next, embodiments of the invention will be described.
In the following, the front and rear directions are defined with the direction indicated by the arrow A in the figure as the front.

  First, an overall configuration of a rice transplanter 1 including a speed change operation mechanism according to an embodiment of the present invention will be described.

  As shown in FIGS. 1 and 2, the rice transplanter 1 mainly includes a traveling machine body 2 and a seedling planting device 3.

  In the traveling machine body 2, the body frame 4 is supported by a pair of left and right front wheels 6 and a pair of left and right rear wheels 7. The vehicle body frame 4 is equipped with an engine 5 and a traveling speed change mission 20. The engine 5 is covered with a bonnet 9 on the front side of the body frame 4. The power of the engine 5 is configured so as to be transmitted to the wheels 6 and 7 after being appropriately shifted by the traveling shift transmission 20. Thereby, the traveling machine body 2 travels so that the traveling speed can be appropriately changed.

The vehicle body frame 4 is provided with a driving operation unit 10. The driving operation unit 10 includes a seat 12, a steering handle 13, an auxiliary transmission lever 14, a main transmission pedal 16, a brake pedal 17, a main transmission dial 18, and the like. The main transmission pedal 16 and the brake pedal 17 are arranged side by side on the floor of the driving operation unit 10 on the right side of the steering handle 13 and pivotally attached to the vehicle body frame 4. The auxiliary transmission lever 14 and the main transmission dial 18 are disposed in the vicinity of the steering handle 13.
Note that the main transmission pedal 16 and the main transmission dial 18 are transmission operation tools, and will be described in detail later.

  The seedling planting device 3 is a multi-row planting type planting device, and is attached to the rear part of the traveling machine body 2 so as to be vertically movable. The seedling planting device 3 includes a seedling mount 31, a planting case 32, a planting arm 33, a claw case 34, a planting claw 35, and the like. The seedling mount 31 is of a forward tilt type with front and rear, and is supported by a planting frame connected to the traveling machine body 2 so as to be slidable back and forth. The planting case 32 protrudes rearward from the planting frame side, and supports planting arms 33, 33,... Rotated at a constant speed in one direction via a planting arm shaft 36 at the rear end portion.

  The planting arm 33 is provided with a pair of claw cases 34 and 34 symmetrically about the planting arm shaft 36 serving as the rotational axis. A planting claw 35 is attached to the tip of the claw case 34.

The seedling planting device 3 drives the wheels 6 and 7 while the traveling machine body 2 travels. At the same time, the seedling planting device 3 takes out one seedling from the seedling mounting table 31 that slides back and forth by the planting claws 35. Planting work to plant seedlings.
More specifically, in the seedling planting device 3, the power transmitted from the traveling machine body 2 is transmitted to the planting arm shaft 36 through the planting case 32, so that the planting arm shaft 36 rotates. Configured to do. When the planting arm shaft 36 rotates, the planting arm 33 fixed to the left and right ends or one end thereof rotates to rotate the claw case 34, and the planting arm fixed to the tip of the claw case 34. The claw 35 is planted in the field while scraping off the seedling placed on the seedling placing table 31.

Next, the speed change operation mechanism provided in the rice transplanter 1 will be described.
The shift operation mechanism refers to a structure for shifting the traveling speed of the traveling machine body 2 of the rice transplanter 1.

The traveling speed change mission 20 is for shifting the power transmitted from the engine 5 mounted on the traveling machine body 2 via an input shaft (not shown) or the like.
As shown in FIG. 3, the traveling transmission mission 20 includes a hydraulic continuously variable transmission 21 that is an example of a continuously variable transmission.

The hydraulic continuously variable transmission 21 includes a variable displacement hydraulic pump 24 driven by the power of the engine 5 and a hydraulic motor 25 driven by the hydraulic pressure from the hydraulic pump 24.
The hydraulic continuously variable transmission 21 tilts a movable swash plate 24a provided in the hydraulic pump 24, and changes the discharge angle of the hydraulic pump 24 by changing the tilt angle of the hydraulic swash plate 24a. The rotational speed of the output shaft 25 is changed to change the traveling speed of the traveling machine body 2.

  The traveling transmission mission 20 includes a clutch mechanism 22 for enabling transmission or interruption of power from the hydraulic continuously variable transmission 21 to the wheels 6 and 7, and a brake for applying a braking force to the wheels 6 and 7. And a mechanism 23.

  Next, a configuration for changing the gear ratio of the hydraulic continuously variable transmission 21 will be described.

  As shown in FIGS. 4 and 5, a speed change operation shaft 63 extends laterally at the front portion of the vehicle body frame 4 and is rotatably supported by a bearing. A sector gear 62 is fixed to the speed change operation shaft 63, and the sector gear 62 and the speed change operation shaft 63 can be rotated together. Further, the arm 65 is fixed to the speed change operation shaft 63 at the base end portion thereof, and the arm 65 and the speed change operation shaft 63 can be integrally rotated.

A pinion 61 is engaged with the sector gear 62 on the speed change operation shaft 63. The pinion 61 can be rotated by the electric motor 60, and is configured to rotate the speed change operation shaft 63 in the arrow C direction or the arrow D direction in FIG.
The electric motor 60 is rotationally driven and controlled by a control device 80 which will be described later, and changes the gear ratio of the hydraulic continuously variable transmission 21. The electric motor 60 is an example of a speed change actuator, and can be an electric cylinder or a solenoid, and the speed change actuator is not limited to this.

  On the other hand, a front end portion of a speed change rod rod 67 extending in the front-rear direction is pivotally attached to the distal end portion of the arm 65 on the speed change operation shaft 63. A long slot 67a is formed in the rear end portion of the transmission rod rod 67 with a predetermined length in the front-rear direction. A pin 47a provided at the distal end portion of the transmission arm 47 of the hydraulic continuously variable transmission 21 is slidably fitted into the long groove hole 67a so that the rear end portion of the transmission rod rod 67, the distal end portion of the transmission arm 47, and the like. Are engaged. The base of the speed change arm 47 is linked to the swash plate 24a of the hydraulic pump 24 shown in FIG. 3 via a trunnion shaft.

  Thus, in the hydraulic continuously variable transmission 21, the speed change rod 63 is not rotated and the speed change rod rod 67 is not moved backward, or the speed change operation shaft 63 is rotated and the speed change rod rod 67 is moved rearward. However, when the amount of movement does not exceed the predetermined length of the long groove hole 67a due to the braking operation of the brake or the clutch pedal "off", the swash plate 24a of the hydraulic pump 24 is driven by the transmission arm 47 and the trunnion shaft. Is set to a neutral position without tilting, and is configured to be in a neutral state in which power is not transmitted to the wheels 6 and 7.

  In the hydraulic continuously variable transmission 21, the speed change rod 63 is rotated in the direction of the arrow C in FIG. 5 with the speed change rod 67 being hardly moved rearward, and the speed change rod 67 is moved rearward. When the rearward movement amount exceeds the predetermined length of the long slot 67a, the swash plate 24a of the hydraulic pump 24 is changed to the rearward movement amount of the transmission rod rod 67 by the transmission arm 47 and the trunnion shaft from that point. Based on this, the gear ratio is changed to the speed increasing side.

  In the hydraulic continuously variable transmission 21, the speed change operation shaft 63 is rotated in the direction of arrow D in FIG. 5 while the speed change rod rod 67 is moved rearward beyond the predetermined length of the long groove hole 67 a, and the speed change is performed. When the rod rod 67 is moved forward, the swash plate of the hydraulic pump 24 is driven by the transmission arm 47 and the trunnion shaft while the rearward movement amount of the transmission rod rod 67 exceeds the predetermined length of the long groove hole 67a. 24a is tilted based on the amount of forward movement of the speed change rod rod 67 to change the speed ratio to the deceleration side.

  Next, the control device 80 will be described.

As shown in FIGS. 3 and 6, the traveling machine body 2 includes a control device 80.
The control device 80 includes an arithmetic unit such as a central processing unit (CPU) that executes arithmetic processing, a storage device (RAM or ROM), an interface, and the like, and receives signals from various sensors. A control program to be output to the electric motor 60 or the like is stored in the ROM.

The control device 80 includes a main shift pedal 16 that is a shift operation tool, a pedal position detection sensor 16a that detects its operation position, a main shift dial 18 that is also a shift operation tool, and a first dial position detection that detects its operation position. A sensor 18a and the like are connected.
And the control apparatus 80 carries out rotation drive control of the electric motor 60 which is a speed-change actuator based on these detection results.

  Next, the shifting structure of the traveling speed of the traveling machine body 2 will be described.

  When the traveling machine body 2 is in a stopped state and the electric motor 60 is not rotationally driven, the speed change rod rod 67 is not moved backward, so that the swash plate 24a of the hydraulic pump 24 of the hydraulic continuously variable transmission 21 is not tilted. That is, the hydraulic continuously variable transmission 21 is in a neutral state in which power is not transmitted to the wheels 6 and 7. Therefore, the traveling machine body 2 maintains the stopped state.

  Further, when the traveling machine body 2 is stopped and the electric motor 60 is driven to rotate, the trunnion shaft is set so that the swash plate 24a of the hydraulic pump 24 in the hydraulic continuously variable transmission 21 has a predetermined set angle. Tilt through. As a result, the hydraulic continuously variable transmission 21 changes its gear ratio to the speed increasing side, and transmits the shifted power to the wheels 6 and 7. Accordingly, the traveling machine body 2 starts traveling.

  In such a state (the traveling machine body 2 is in a traveling state), when the electric motor 60 is rotationally driven in a direction opposite to the above-described direction, the swash plate 24a of the hydraulic pump 24 in the hydraulic continuously variable transmission 21 is It tilts in the opposite direction through the trunnion shaft so as to have a set angle. As a result, the hydraulic continuously variable transmission 21 changes its gear ratio to the deceleration side, transmits the shifted power to the wheels 6 and 7, and the speed of the traveling machine body 2 is reduced.

  When the transmission arm 47 returns to the original position and the swash plate 24a of the hydraulic pump 24 of the hydraulic continuously variable transmission 21 is in the neutral position, the traveling of the traveling machine body 2 is stopped.

  Next, the main transmission pedal 16 and the main transmission dial 18 will be described.

  As shown in FIG. 1 to FIG. 3 and FIG. 6, the main transmission pedal 16 and the main transmission dial 18 are shift operation tools for shifting the traveling speed of the traveling machine body 2.

  The main transmission pedal 16 is a stepping pedal that is an example of a foot operating tool that is operated by a driver's foot, and is disposed on the floor surface of the driving operation unit 10 in a slanted shape that is front and rear and low. The main transmission pedal 16 is configured to be able to be rotated forward and backward by the operator depressing with his / her foot or removing his / her foot from the depressed state.

  A pedal position detection sensor 16 a for detecting an operation position is provided at the rotation base of the main transmission pedal 16.

The main transmission dial 18 is a rotary dial that is operated by the operator.
The main transmission dial 18 is configured so that the gear ratio of the hydraulic continuously variable transmission 21 can be set by a control device 80 in a plurality of stages or continuously.
When the gear ratio is set in a plurality of stages, the operator can change the traveling speed of the traveling machine body 2 by operating the main transmission dial 18 to select a desired gear ratio stepwise. Further, when the gear ratio is set in a stepless manner, the operator can select the desired gear ratio steplessly by operating the main gear shift dial 18 to change the travel speed of the traveling machine body 2.
The main transmission dial 18 is disposed in the vicinity of the steering handle 13 of the driving operation unit 10, that is, at a position where the operator can operate the main transmission dial 18 with his / her hand while maintaining the steering posture.
The main transmission dial 18 is an example of a hand operating tool, and is not limited to a rotary dial such as the main transmission dial 18. The operator uses his / her hand to adjust the hydraulic continuously variable transmission 21. Any gear ratio can be used as long as the gear ratio can be set in a plurality of stages or continuously.

  A first dial position detection sensor 18 a that detects an operation position is provided at the rotation base of the main transmission dial 18.

  The main speed change dial 18 is an example of a hand operating tool that is a speed change operating tool as described above. The type of the main speed changing dial 18 is not limited to the rotary dial type. Anything that can be used and operated is acceptable.

  The main speed change pedal 16 and the main speed change dial 18 can be operated independently of each other, and the electric motor 60 can be operated by the control device 80. Therefore, the operator can select whether to operate the main transmission pedal 16 or the main transmission dial 18 according to the situation of the operator, and can change the traveling speed of the traveling machine body 2.

  Moreover, the rice transplanter 1 can be configured to include an operation selection dial 19.

As shown in FIGS. 2, 3, and 6, the operation selection dial 19 is a rotary dial and is disposed in the vicinity of the steering handle 13 of the driving operation unit 10.
The operation selection dial 19 is a member that selects a mode for operating a speed change operation tool for shifting the traveling speed of the traveling machine body 2, and the selection mode, the combination mode, or the auto cruise mode is selected by the selection operation of the operation selection dial 19. And maintenance mode.

  In the alternative mode, either the main transmission pedal 16 or the main transmission dial 18 can be alternatively selected as an operable shift operation tool. That is, when the shift operation tool not selected by the operation selection dial 19 is operated, the traveling speed of the traveling machine body 2 cannot be shifted.

  In the combined mode, the main speed change pedal 16 and the main speed change dial 18 can be used together as an operable speed change operation tool to perform a speed change operation. That is, the operator can change the traveling speed of the traveling machine body 2 by operating either the main transmission pedal 16 or the main transmission dial 18. However, in order to prevent malfunction, it is configured such that when one is operated, shifting is not possible even if the other is operated.

  In the auto-cruise mode, either the main transmission pedal 16 or the main transmission dial 18 is used as a constant speed traveling speed setting operation tool, and the other is used as a normal transmission operation tool. For example, even if the traveling speed at the time of planting work is set by the main transmission dial 18 and the traveling is temporarily stopped by the seedling, or the shifting operation is performed by the main transmission pedal 16 during turning, the main transmission pedal When the shifting operation is no longer performed by 16 (when the planting operation is resumed), the vehicle is driven at the shifting position set by the main transmission dial 18.

  In the maintenance mode, when the pedal position detection sensor 16a, the first dial position detection sensor 18a, or the like fails, the control device 80 controls the electric motor 60 to rotate at a predetermined speed so that the field edge or the like can be maintained at a low speed. It can be moved with.

A second dial position detection sensor 19 a that detects an operation position is provided at the rotation base of the operation selection dial 19. The second dial position detection sensor 19a is connected to the control device 80. The control device 80 is configured to rotationally control the electric motor 60 that is a speed change actuator based on the detection result from the second dial position detection sensor 19a.
For example, when the selection mode is set by the operation selection dial 19 and the main shift pedal 16 is selected and set as the shift operation tool, the control device 80 selects based on the detection result from the second dial position detection sensor 19a. The operation of the main transmission dial 18 that has not been set is controlled so that the electric motor 60 is not rotationally driven.

  The operation selection dial 19 is an example of an operation selection means, and the selection format is not limited to the rotary dial type, as long as the operation selection can be set even with a lever type or a button type. Good. Further, in the rice transplanter 1, the operation selection dial 19 is disposed in the vicinity of the steering handle 13 of the driving operation unit 10. However, the operation selection dial 19 is not limited to the arrangement, and is not limited to the operator's feet or the vicinity of the seat. There may be.

As described above, the hydraulic continuously variable transmission 21 that shifts the power from the engine 5 mounted on the traveling machine body 2, and the electric motor 60 (transmission actuator) that changes the transmission ratio of the hydraulic continuously variable transmission 21. In the shift operation mechanism of the rice transplanter 1 that includes a control device 80 that drives and controls the electric motor 60 (transmission actuator), and a shift operation tool that operates the control device 80, the shift operation tool is the foot of the operator. Are provided with a main transmission pedal 16 (foot operating tool) operated by the operator and a main transmission dial 18 (hand operating tool) operated by the operator's hand. The main transmission pedal 16 (foot operating tool) and the main transmission dial 18 are provided. The “hand operating tool” is a device that can individually control the drive of the electric motor 60 (transmission actuator) by the control device 80 and can perform a shift operation of the hydraulic continuously variable transmission 21.
In such a configuration, the operator operates not only the main transmission pedal 16 that is the foot operation tool but also the main transmission dial 18 that is the hand operation tool using his / her hand as the speed change operation tool. 2 travel speeds can be changed. Therefore, even when the pilot cannot use his / her feet, the traveling speed of the traveling machine body 2 can be easily changed.

Further, the main transmission dial 18 (hand operating tool) is formed by the control device 80 so that the gear ratio of the hydraulic continuously variable transmission 21 can be set in a plurality of steps or continuously, and is provided in the driving operation unit 10 of the traveling machine body 2. It can be set as the structure arrange | positioned in the steering handle 13 vicinity arrange | positioned.
In such a configuration, even when the traveling machine body 2 is traveling, the operator does not bend, and fine adjustment of the speed change operation of the hydraulic continuously variable transmission 21 can be easily performed in the control posture. Can do.

In addition, an operation selection dial 19 (operation selection means) for selectively selecting the main transmission pedal 16 (foot operation tool) and the main transmission dial 18 (hand operation tool) as an operation tool capable of shifting operation is provided. Can do.
In such a configuration, either the foot operating tool (main transmission pedal 16) or the hand operating tool (main transmission dial 18) can be selected and used according to the preference of the operator. Further, when the operator works standing in the operation of the rice transplanter, not the foot operating tool (main transmission pedal 16) but the hand operating tool (main transmission dial 18) can be operated, so that workability can be improved. it can.

DESCRIPTION OF SYMBOLS 1 Rice transplanter 2 Traveling machine body 3 Seedling device 4 Body frame 5 Engine 10 Driving operation part 13 Steering handle 16 Main transmission pedal 16a Pedal position detection sensor 18 Main transmission dial 18a First dial position detection sensor 19 Operation selection dial 19a Second dial Position detection sensor 20 Traveling transmission mission 60 Electric motor 80 Control device

Claims (3)

A continuously variable transmission for shifting power from an engine mounted on a traveling machine body, a transmission actuator for changing a transmission ratio of the continuously variable transmission, a control device for driving and controlling the transmission actuator, and operating the control device A shifting operation mechanism of a rice transplanter comprising:
The shift operation tool is provided with a foot operation tool that is operated with a pilot's foot and a hand operation tool that is operated with a pilot's hand,
The foot operation tool and the hand operation tool can independently drive and control the speed change actuator by the control device, and the stepless speed change device can be speed-changed.
A speed change operation mechanism for rice transplanters.   The hand operating tool is formed in such a manner that the gear ratio of the continuously variable transmission can be set in a plurality of steps or continuously without the control device, and is disposed in the vicinity of the steering handle disposed in the driving operation portion of the traveling machine body. The speed change operation mechanism of the rice transplanter according to claim 1.   The speed change operation mechanism of the rice transplanter of Claim 1 provided with the operation selection means which selectively selects the said foot operation tool and the said hand operation tool as an operation tool which can carry out a speed change operation.

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