JP2019110777A - Paddy field implement - Google Patents

Abstract

To provide a paddy field implement capable of changing and setting a supply amount of an agricultural material to a field surface according to states of a paddy field and the agricultural material without risk of damage of a work device, without a special device for regulation on the work device.SOLUTION: A paddy field implement comprises: a first speed changer 24 to which motive force of a prime mover part is transmitted; a work device for supplying an agricultural material to a field surface at a supply amount which has been set in advance along a travel direction of the machine body; a branch part for branching the motive force of the first speed changer 24 to a travel transmission system and a work transmission system; wheels for travel to which motive force of the travel transmission system is transmitted; and a second speed changer 45 for changing speed of the motive force of the work transmission system and then transmitting the same to the work device. The second speed changer 45 has a checking mechanism K for allowing normal rotation motive force out of the motive force of the work transmission system to be transmitted to the work device and checking transmission of reverse rotation motive force to the work device.SELECTED DRAWING: Figure 5

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a paddy field work machine that supplies agricultural materials such as seedlings, seeds, fertilizers, drugs and the like to a dredger scene, such as a riding type rice planter and a riding type direct seeding machine.

  Some riding type rice planters, which are an example of a paddy field work machine, have a configuration as disclosed in Patent Document 1. In Patent Document 1, the power of the engine (corresponding to the drive unit) is transmitted to the main transmission, and the power after the shift is branched and transmitted to the traveling wheels and the seedling planting device (corresponding to the work device). There is.

  As a result, the seedlings are planted in the weir scene by the seedling planting device between the stocks (corresponding to the supply amount) set in advance along the traveling direction of the fuselage, and the main transmission is operated and the traveling speed of the fuselage Since the power transmitted to the seedling planting device is also the power that has been shifted by the main transmission device, the spacing between the stockings by the seedling planting device is maintained at a constant interval, even if.

  Then, the power of the main transmission is transmitted to the seedling planting device through the gear-shifting type inter-gear transmission, and the inter-growing transmission can be shifted to change the stocking by the seedling planting device It is configured to be able to. By changing between stocks, the supply amount of seedlings supplied to the dredging scene is changed.

JP, 2014-70653, A

  In the above-described conventional configuration, since the main transmission transmits the power after gear shift to the wheels for traveling, the power transmission state of both the forward rotation transmission state and the reverse rotation transmission state so as to correspond not only to forward traveling but also backward traveling. There is. However, in the above-described conventional configuration, the inter-shaft transmission is a gear transmission, and power is directly transmitted to the work device not only in the forward rotation transmission state but also in the reverse rotation transmission state.

  Heretofore, at the time of backward movement of the vehicle body, a measure has been taken such as switching the working clutch for intermittently transferring power to the working device to the off state so that the reverse rotation power is not transmitted. However, for example, in the case where the disconnection operation of the working clutch is delayed or malfunctions, the reverse rotation power is transmitted to the working device, and proper operation is not performed, which may cause damage. And in order to prevent damage, it was necessary to equip the work apparatus side with a special device for regulating the reverse rotation power.

  Therefore, even if the working device is not equipped with a special control device, the amount of agricultural material supplied to the dredging scene is changed and set according to the condition of the field or agricultural material without any risk of damage to the working device. It is demanded to be able to do it.

The characteristic configuration of the paddy field work machine according to the present invention is
A first transmission to which power of the driving unit is transmitted;
A working device for supplying agricultural material to a bird's-eye view with a supply amount set in advance along the traveling direction of the vehicle;
A branch portion that branches the power of the first transmission into a traveling transmission system and a work transmission system;
A traveling wheel to which power of the traveling transmission system is transmitted;
A second transmission configured to shift the power of the work transmission system and transmit the power to the work device;
A check control mechanism which allows the second transmission to transmit normal rotation power among the power of the work transmission system to the work device, and controls the reverse transmission power to be transmitted to the work device. It is in the point equipped.

  According to this configuration, the power of the work transmission system of the first transmission is transmitted to the work device through the second transmission, and by operating the second transmission, the shift operation of the second transmission is performed. It is possible to change and set the supply amount of agricultural materials to be supplied to the dredging scene within the range.

  For example, when the shift power of the first transmission is set to the normal rotation state, and the work device is performing the supply operation of the agricultural material while the machine body travels forward, the second transmission outputs the reverse power. If it is changed to "1", there is a risk that the working device will not operate properly.

  However, according to the present configuration, it is possible to prevent the reverse transmission power from being transmitted from the second transmission to the working device by the check mechanism provided in the second transmission. As a result, no reverse power is output to the working device, and only the normal power can be transmitted without using a special device for restricting the reverse power on the working device side.

  Therefore, even if the work device is not equipped with a special control device, the supply amount of agricultural material to the dredged scene is changed according to the condition of the agricultural field and agricultural material without any risk of damage to the work device. It became possible to set it.

In the present invention, the second transmission is constituted by a hydrostatic stepless transmission.
It is preferable that the check mechanism is a contact member that holds the shift arm for operating the trunnion shaft in the hydrostatic stepless transmission into contact with the reverse operation area.

  According to this configuration, since the second transmission is configured as a hydrostatic stepless transmission, the power of the work transmission system can be shifted steplessly. In this manner, by continuously changing the speed, it is possible to set an arbitrary supply amount between the highest speed position and the lowest speed position of the continuously variable transmission according to the working condition, according to the working condition. Can. As a result, the supply amount can be set finely and appropriately according to the condition of the dredging scene, agricultural materials, etc., and the working accuracy of the paddy field work machine can be improved.

  The hydrostatic continuously variable transmission can steplessly shift not only the forward rotation power but also the reverse rotation power. Therefore, the transmission arm for operating the trunnion shaft is contact-restrained by the contact member so that the trunnion shaft is operated in the reverse operation area. By mechanically constraining in this manner, it can be reliably avoided that the reverse power is transmitted to the working device.

  The contact member may be any member that restricts the gear shift arm and can be of a simple structure. Also, for example, when adopting a configuration in which the transmission arm is operated by the actuator, the reverse rotation power is obtained even if the actuator is operated excessively due to a factor such as a detection error of a sensor that detects the operation state of the trunnion axis. Can be reliably restrained from being transmitted to the working device.

In the present invention, a shift operating tool for changing and operating the shift state of the first transmission device;
It is preferable that a control device for switching the second transmission to a neutral state is provided when the shift operation tool is operated to the reverse travel side.

  According to this configuration, when the gearshift operating tool is operated from the operation area on the forward travel side to the reverse travel side, the second shift operation is switched to the neutral state. As the operation to the reverse travel side, for example, the shift operation tool is operated to the lowest speed position (position corresponding to the neutral state) in the operation area on the forward travel side, the shift operation tool is positioned at the neutral operation position And the lowest speed position (position corresponding to the neutral state) in the reverse travel side operation area.

  Thus, since the second transmission is switched to the neutral state based on the operation with high probability of being switched to the reverse transmission state before the shift operation tool is actually switched to the reverse transmission state, a slight time delay to the switching operation Even if there is a problem, it can be avoided that the reverse power is transmitted to the working device, and damage to the working device can be prevented.

  In the present invention, it is preferable that the work device intermittently supplies the agricultural material to the dredger at feed intervals set in advance along the traveling direction of the machine.

  According to this configuration, the work device intermittently supplies the agricultural material to the dredging scene while leaving an interval as the airframe travels. As the second transmission shifts, the supply amount is changed by changing and setting the interval at which the working device supplies the agricultural material. In this configuration, the entire supply amount can be changed without changing the amount of agricultural materials to be supplied at one time, so the adjustment operation of the supply amount is unnecessary and the correspondence becomes easy.

  In the present invention, it is preferable that the work device be provided with a sowing device for point-seeding seeds as agricultural material at a grazing scene at a supply interval set in advance along the traveling direction of the machine body.

  According to this configuration, it is possible to point-seed the seeds to the sorrel scene by the sowing device while running the machine body, and it becomes easy to manage the intervals of the point-seeding of the seeds accurately in the sowing operation.

  In the present invention, it is preferable that the work device be provided with a seedling planting device for supplying seedlings as agricultural material to the grazing scene at a supply interval set in advance along the traveling direction of the machine body. .

  According to this configuration, it is possible to plant seedlings in a weir scene by the seedling planting device while traveling the machine body, and it becomes easy to manage the planting interval of the seedlings with high accuracy in the seedling planting operation.

It is a whole side view of a riding type rice transplanter. It is a whole top view of a riding type rice transplanter. It is a vertical rear view showing a transmission structure. It is a vertical rear view showing a transmission structure. It is a block diagram showing control composition.

The embodiment of the present invention is applied to a riding type rice transplanter, which is an example of a paddy work machine, described based on the drawings. The longitudinal direction and the lateral direction in the present embodiment are as follows unless specifically described. It is described in. The traveling direction on the forward side during traveling of the traveling airframe 11 is "front", and the traveling direction on the reverse side is "rear". The direction corresponding to the right side with respect to the forward posture in the front-rear direction is "right", and the direction corresponding to the left side is "left". That is, the direction shown by the code (F) in FIGS. 1 and 2 is the machine front side, and the direction shown by the code (B) in FIGS. 1 and 2 is the machine rear side. The direction indicated by the symbol (L) in FIG. 2 is the left side of the machine, and the direction indicated by the symbol (R) in FIG. 2 is the right side of the machine.

(Overall configuration of riding type rice transplanter)
As shown in FIG. 1 and FIG. 2, the riding type rice transplanter is equipped with a right and left front wheel 1 (corresponding to a traveling wheel) and a right and left rear wheel 2 (corresponding to a traveling wheel). A hydraulic cylinder 4 for driving the link mechanism 3 and the link mechanism 3 up and down is provided at the rear of the machine body 11, and a seedling planting device 5 (corresponding to a work device) is supported at the rear of the link mechanism 3.

  The seedling planting device 5 includes a planting transmission case 6 disposed at a predetermined interval in the left-right direction, a rotation case 7 rotatably supported at the rear right and left portions of the planting transmission case 6, and a rotation case 7 A pair of planting arms 8, a float 9, and a seedling platform 10, etc. are provided at both ends of the vehicle.

  Right and left markers 12 are provided on the right and left lateral sides of the seedling planting device 5. The marker 12 is changeable to a working posture (see FIG. 1) to be in contact with the crawling scene G and a storage posture away from the crawling scene G, and the rotating body 12a is rotatably supported by the tip of the marker 12 ing. In the working posture of the marker 12, the rotary body 12a of the marker 12 is in contact with the overhead scene G, and the rotary body 12a of the marker 12 forms an index in the overhead scene G while rotating as the traveling aircraft 11 travels. .

(Configuration around the driving unit)
As shown in FIGS. 1 and 2, the traveling airframe 11 is provided with a driver's seat 13 and a steering handle 14 for steering the front wheel 1.

  Right and left vertical support frames 16 are provided on the right and left portions of the front of the traveling airframe 11, and a backup seedling platform 15 is supported on the vertical support frames 16. A laterally oriented support frame 17 is connected across the top of the right and left vertically oriented support frames 16.

  A position measurement device 18 is attached to a portion of the laterally oriented support frame 17 located at the left and right center CL of the traveling body 11 in a plan view. The position measurement device 18 includes a reception device (not shown) that acquires position information by a satellite positioning system, and an inertial measurement device (not shown) that detects the inclination (pitch angle, roll angle) of the traveling vehicle 11. The position measurement device 18 outputs positioning data indicating the position of the traveling body 11.

  In a rear axle case 22 supporting the right and left rear wheels 2, an inertial measurement device 19 for measuring inertial information is attached to a portion located in the left and right center CL of the traveling body 11 in plan view. The inertial measurement of the inertial measurement device 19 and the position measurement device 18 is configured by an IMU (Inertial Measurement Unit).

  Among the above-mentioned satellite navigation systems (GNSS: Global Navigation Satellite System), GPS (Global Positioning System) can be mentioned as a typical example. The GPS uses a plurality of GPS satellites orbiting the earth, a control station performing tracking and control of the GPS satellites, and a receiver provided with an object to be measured (running body 11). It measures the position of the receiving device.

  The inertial measurement device 19 is provided with a gyro sensor (not shown) capable of detecting an angular velocity of the yaw angle of the traveling body 11 and an acceleration sensor (not shown) capable of detecting acceleration in three axial directions orthogonal to each other. . The inertial information measured by the inertial measurement device 19 includes direction change information detected by the gyro sensor and position change information detected by the acceleration sensor. As a result, the position measurement device 18 and the inertia measurement device 19 detect the position of the traveling body 11 and the orientation of the traveling body 11.

(Configuration around the mission case)
A transmission case 20 is supported at the front of the traveling airframe 11, and right and left front wheels 1 are supported by a front axle case 21 connected to the right and left lateral sides of the transmission case 20. A rear axle case 22 is supported at the rear of the traveling airframe 11, and right and left rear wheels 2 are supported by the rear axle case 22.

  At the front of the transmission case 20, an engine 23 (corresponding to a driving unit) is supported. A first transmission 24 composed of a hydrostatic stepless transmission is connected to the left lateral side of the transmission case 20, and the power of the engine 23 is input to the first transmission 24 via the transmission belt 25. It is transmitted to the shaft 24a.

  The first transmission 24 is configured to be continuously and continuously variable-displaceable to the neutral position, forward and reverse sides, by the main shift lever 30 as a shift operating tool provided on the left side of the steering handle 14. One transmission 24 is operated. To add the description, as shown in FIG. 3, the first transmission 24 integrally accommodates the axial plunger type hydraulic pump 24P and the axial plunger type hydraulic motor 24M in a casing 24C. It is comprised by the hydrostatic continuously variable transmission of a well-known structure.

  As shown in FIG. 5, a main transmission lever 30 and a transmission arm 24d for operating a trunnion shaft 24c for operating the swash plate of the hydraulic pump 24P are interlocked and linked by a linkage mechanism 30R. By changing the inclination of the swash plate of the hydraulic pump 24P by operating the main shift lever 30, it is possible to steplessly shift the rotational power.

  As shown in FIG. 5, the main shift lever 30 can be rocked in the front and rear direction, and a forward operation area is set forward from the neutral position N of the front and rear intermediate portion, and reverse operation area backward from the neutral position N Is set. The forward travel speed is increased as the main shift lever 30 is pivoted forward from the neutral position N in the forward operation area. As the main shift lever 30 is swung rearward from the neutral position N, the reverse travel speed is increased. The forward operation area and the reverse operation area are shifted in the left-right direction, and the main shift lever 30 can be shifted in the left-right direction between the forward neutral position and the reverse neutral position at the neutral position N. Therefore, it is not possible to swing from the forward operation type to the reverse operation area at once.

(Configuration of traveling transmission system to front and rear wheels)
As shown in FIG. 3, a hydraulic pump 26 is connected to the right lateral side of the transmission case 20, and the hydraulic pump 26 supplies hydraulic oil to the hydraulic cylinder 4 and the like. The input shaft 24 a of the first transmission 24 enters the transmission case 20, and the transmission shaft 27 is connected to the input shaft 26 a of the hydraulic pump 26 and the input shaft 24 a of the first transmission 24.

  Inside the transmission case 20, the transmission shafts 28, 29 are supported along the left-right direction, and the output shaft 24b of the first transmission 24 is connected to the end of the transmission shaft 28. Inside the transmission case 20, a gear-change-type auxiliary transmission 31 is provided across the transmission shafts 28 and 29.

  The auxiliary transmission 31 includes a low speed gear 32 and a high speed gear 33 connected to the transmission shaft 28, and a shift gear 34 fitted on the transmission shaft 29 integrally rotatably and slidably by a spline structure. The shift gear 34 can be slide operated by an auxiliary shift lever (not shown) provided in the vicinity of the driver's seat 13.

In the auxiliary transmission 31, when the shift gear 34 is engaged with the low speed gear 32, the power of the transmission shaft 28 is transmitted to the transmission shaft 29 at low speed, and when the shift gear 34 is engaged with the high speed gear 33, the power of the transmission shaft 28 is It is transmitted to the transmission shaft 29 at high speed.
When the planting work is performed in the paddy field, the auxiliary transmission 31 is operated at a low speed, and when traveling at high speed on a road or the like, the auxiliary transmission 31 is operated at a high speed.

  The right and left front axles 35 for transmitting power to the right and left front wheels 1 are supported across the transmission case 20 and the front axle case 21, and between the right and left front axles 35, a front wheel differential device 36 are provided. The transmission gear 37 connected to the transmission shaft 29 and the transmission gear 38 connected to the case 36 a of the front wheel differential device 36 are engaged with each other.

  An output shaft 39 is supported at the rear of the transmission case 20 along the front-rear direction, and a bevel gear 40 connected to the case 36 a of the front wheel differential device 36 and a bevel gear 39 a formed at the front of the output shaft 39 I have an occlusion.

  As shown in FIG. 1, the transmission shaft 41 is connected to the rear of the output shaft 39 via a universal joint (not shown), and the rear of the transmission shaft 41 is via the universal joint (not shown) , And an input shaft (not shown) of the rear axle case 22.

With the above configuration, the power transmitted by the first transmission 24 is transmitted from the output shaft 24b of the first transmission 24 to the transmission shaft 28, the auxiliary transmission 31, the transmission shaft 29, the transmission gears 37 and 38, and the front wheel differential device. It is transmitted to the right and left front wheels 1 via 36 and the front axle 35.
The power transmitted to front wheel differential device 36 is transmitted to right and left rear wheels 2 via bevel gear 40, output shaft 39, transmission shaft 41, and a transmission shaft (not shown) inside rear axle case 22. Ru.

  The multi-plate type brake 42 is externally fitted to the output shaft 39, and the brake 42 can be operated to the braking state by stepping on the brake pedal 43 shown in FIG. By braking the output shaft 39 with the brake 42, the front wheel 1 and the rear wheel 2 can be braked.

  The diff lock member 44 is fitted on the left front axle 35 integrally rotatably and slidably by a key structure. By stepping on the diff lock pedal (not shown) provided on the lower side of the driver's seat 13, the diff lock member 44 is slide operated to engage the case 36a of the front wheel diff device 36, whereby the front wheel diff device 36 is It can be operated in the differential lock state.

  With the above configuration, the power of the first transmission 24 is branched in parallel to the traveling transmission system and the work transmission system at the transmission shaft 28, and the traveling transmission system power passes through the auxiliary transmission 31 to the front wheels 1 and It is in a state of being transmitted to the rear wheel 2 (a wheel for traveling). Thus, the transmission shaft 28 constitutes a branch.

(Configuration of work transmission system to seedling planting device)
As shown in FIG. 4, a second transmission 45, which is a hydrostatic stepless transmission, is connected to the right lateral side of the transmission case 20. Similar to the first transmission 24, the second transmission 45 is well known in which an axial plunger type hydraulic pump 45P and an axial plunger type hydraulic motor 45M are integrally housed in a casing 45C. It is constituted by a hydrostatic continuously variable transmission of structure. By changing the inclination of a swash plate (not shown) provided in the hydraulic pump 45P, it is possible to steplessly change the rotational power.

  The input shaft 45a of the second transmission 45 and the transmission shaft 28 are connected. The input shaft 45a of the second transmission 45 protrudes to the opposite side of the transmission case 20, and the exhaust heat fan 46 for sending the cooling air to the second transmission 45 projects the input shaft 45a of the second transmission 45 It is connected to the department. That is, the fan 46 is provided to rotate integrally with the hydraulic pump 45P.

  The transmission shaft 47 is connected to the output shaft 45 b of the second transmission 45. The transmission shafts 48 and 49 are supported along the left-right direction in the transmission case 20, and the end of the transmission shaft 49 is supported so as to be relatively coaxial with the transmission shaft 47.

  A transmission gear 50 having two sets of gears is rotatably fitted on the outside of the transmission shaft 48. The transmission gear 47a formed on the transmission shaft 47 is engaged with the large diameter gear portion of the transmission gear 50, and the transmission gear 51 connected to the transmission shaft 49 is engaged with the small diameter gear portion of the transmission gear 50. .

  Inside the transmission case 20, a gear-shift-type unequal-speed transmission 52 is provided across the transmission shafts 48 and 49, and a bevel gear 53 is connected to the transmission shaft 48. The output shaft 54 is supported along the longitudinal direction at the rear of the transmission case 20, and the bevel gear 55 is externally fitted to the front of the output shaft 54 via the planting clutch 56, and the bevel gears 53 and 55 are engaged. .

  As shown in FIG. 1, the transmission shaft 57 is connected to the rear of the output shaft 54 via a universal joint (not shown), and the rear of the transmission shaft 57 is via the universal joint (not shown) , And an input shaft (not shown) of the seedling planting device 5.

  With the above configuration, the power transmitted by the first transmission 24 is transmitted from the output shaft 24 b of the first transmission 24 to the second transmission 45 via the transmission shaft 28 and the input shaft 45 a of the second transmission 45. Transmitted to

  The power transmitted by the second transmission 45 is transmitted from the output shaft 45b of the second transmission 45 to the transmission shaft 47 (transmission gear 47a), transmission gears 50 and 51, transmission shaft 49, unequal speed transmission 52, transmission The seedling planting device 5 is transmitted via the shaft 48, bevel gears 53 and 55, the planting clutch 56, the output shaft 54, and the transmission shaft 57.

When the planting clutch 56 is operated to the power transmission state, power is transmitted to the seedling planting device 5, and the seedling planting device 5 is operated.
When the seedling planting device 5 is operated, as shown in FIG. 5, as the seedling platform 10 is driven to reciprocate laterally to the left and right, the rotating case 7 is rotationally driven counterclockwise in FIG. A set of planting arms 8 alternately take out the seedlings A (corresponding to agricultural materials) from the lower part of the seedling platform 10 and plant them on the weir scene G. As a result, the seedlings A are intermittently planted in the drought scene G along the set direction L1 (corresponding to the supply interval) set in advance along the traveling direction F1 of the traveling machine body 11.
When the planting clutch 56 is operated in the shutoff state, the power to the seedling planting device 5 is shut off, the seedling planting device 5 is stopped, and the seedling platform 10 and the rotation case 7 are stopped.

  With the above configuration, the power of the first transmission 24 (transmission) is branched in parallel to the traveling transmission system and the work transmission system, and the power of the work transmission system is the second transmission 45 and the unequal speed transmission 52 , And is transmitted to the seedling planting device 5 (working device).

(Configuration of unequal speed transmission)
As shown in FIG. 4, the unequal speed transmission 52 has an equal speed gear 58 connected to the transmission shaft 49, three unequal speed gears 59, and an equal speed externally fitted to the transmission shaft 48 so as to be relatively rotatable. The gear 60 and the three unequal-speed gears 61 are provided, the constant-velocity gears 58 and 60 are engaged, and the three unequal-speed gears 59 and 61 are engaged with each other.

  A key-like speed changing member 62 is slidably supported inside the transmission shaft 48, and the speed changing member 62 is slidably operated to engage with the constant speed gear 60 and one of the three unequal speed gears 61. By combining these, any one of the constant velocity gear 60 and the three unequal velocity gears 61 with which the transmission member 62 is engaged can be connected to the transmission shaft 48.

  The constant velocity gears 58 and 60 are circular gears and have the same diameter. Thus, when the transmission member 62 is engaged with the constant velocity gear 60, the power of one rotation of the transmission shaft 49 is transmitted to the transmission shaft 48 as the power of one rotation at the constant velocity state of the angular velocity.

  The nonuniform gears 59, 61 are elliptical gears, eccentric gears or non-circular gears. Thereby, when the transmission member 62 is engaged with one of the unequal-speed gears 61, the power of one rotation of the transmission shaft 49 is transmitted to the transmission shaft 48 as the power of one rotation. The angular velocity changes to high and low.

  When the inconstant speed gears 59 and 61 are eccentric gears, a plurality of dislocations of the gear teeth are set in one eccentric gear, and the dislocations are set to be different depending on the gear teeth. As a result, it is possible to reduce the variance of the backlash of the inconstant speed gears 59 and 61, and the power transmission by the inconstant speed gears 59 and 61 can be made smooth.

(Configuration of control system for operating the continuously variable transmission)
As shown in FIG. 5, the traveling body 11 is provided with a control device 63. A setting unit 64 for setting the set stock interval L1 is provided in the vicinity of the driver's seat 13 or the steering handle 14, and an operation signal of the setting unit 64 is input to the control device 63.

  The setting unit 64 is a type of operation lever operated by the operator artificially, and the operator arbitrarily sets (selects) the set interval L1 steplessly between the maximum interval L11 and the minimum interval L12. Can.

  As shown in FIG. 4, the gear toothed rotary body 49a is connected to the transmission shaft 49 so as to rotate integrally. A work rotation speed detection unit 65 of a pickup sensor type is provided for the rotating body 49 a, and a detection value of the work rotation speed detection unit 65 is input to the control device 63.

  Thereby, on the downstream side of the second transmission 45 and on the upstream side of the inconstant speed transmission 52, the transmission system (transmission shaft 49) between the second transmission 45 and the inconstant speed transmission 52 The rotation speed is detected by the work rotation speed detection unit 65 as the rotation speed of the power from the second transmission 45, and is input to the control device 63.

  As shown in FIG. 4, a gear toothed rotary body 28 a is connected to the transmission shaft 28 so as to rotate integrally with the transmission shaft 28. A traveling rotation speed detection unit 66 of a pickup sensor type is provided for the rotating body 28 a of the transmission shaft 28, and a detection value of the traveling rotation speed detection unit 66 is input to the control device 63.

  As a result, on the upstream side of the auxiliary transmission 31, the traveling rotation speed detection unit 66 that detects the number of rotations of the transmission system between the traveling transmission system and the branch portion (transmission shaft 28) of the operation transmission system and the auxiliary transmission 31. Is in the state of being prepared.

  As shown in FIG. 5, a drive mechanism 67 is provided which operates the second transmission 45 by changing the angle of a swash plate (not shown) of the hydraulic pump 45P in the second transmission 45. The operation signal is output to the drive mechanism 67 from The second transmission 45 is provided with a shift arm 45 d for operating the trunnion shaft 45 c for swash plate operation. The drive mechanism 67 is provided with an electric motor 67A with a reduction gear, a drive arm 67B pivoted by the electric motor 67A, and a rod 67C pivotally connecting the drive arm 67B and the transmission arm 45d. By swinging the drive arm 67B, the transmission arm 45d swings by being pushed and pulled by the rod 67C, and the shift operation is performed. Although not shown, a potentiometer type detection sensor for detecting the swing operation position of the drive arm 67B is provided, and the detection value of the detection sensor is input to the control device 63.

  A slip ratio detection unit 68, a control unit 69, a timer 70, a first travel distance detection unit 71, a second travel distance detection unit 72, and a supply interval detection unit 73 are provided in the control device 63 as software.

(Detection of slip ratio of front and rear wheels)
When the planting operation is performed in the paddy field, since the slip occurs on the front wheel 1 and the rear wheel 2, the slip rate of the front wheel 1 and the rear wheel 2 is detected in the slip rate detection unit 68 as described below.

  In this case, when the front wheels 1 and the rear wheels 2 slip, the front wheels 1 and the rear wheels 2 are idled, and the front body 1 and the rear wheels 2 are rotating. It has not advanced.

In the planting operation, the timer 70 detects a certain first time point and a second time point after the set time has elapsed from the first time point.
From the first time point to the second time point, based on the detection of the position of the traveling airframe 11 and the orientation of the traveling airframe 11 by the position measurement device 18 and the inertia measurement device 19, the first traveling distance detection unit 71 Travel distance is detected. In this case, the detection value of the first traveling distance detection unit 71 includes the slip of the front wheel 1 and the rear wheel 2.

  From the first time point to the second time point, the second traveling distance detection unit 72 is determined by the outer diameters of the front wheel 1 and the rear wheel 2 and the detection value of the traveling rotation speed detection unit 66 (rotation speed of the front wheel 1 and the rear wheel 2). Thus, the traveling distance of the traveling body 11 is detected (calculated). In this case, the front wheel 1 and the rear wheel 2 do not include slips in the detection value of the second traveling distance detection unit 72.

The slip ratio detection unit 68 compares the detection value of the first travel distance detection unit 71 with the detection value of the second travel distance detection unit 72.
When the front wheel 1 and the rear wheel 2 slip, the detection value of the first traveling distance detection unit 71 becomes smaller than the detection value of the second traveling distance detection unit 72, and the first traveling distance detection unit As the difference between the detection values of the first and second traveling distance detectors 72 increases, it can be determined that more slippage of the front wheel 1 and the rear wheel 2 is generated.

Thereby, based on the detection value of the first travel distance detection unit 71 and the detection value of the second travel distance detection unit 72, the slip ratio detection unit 68 detects the slip ratios of the front wheel 1 and the rear wheel 2.
When the slip ratio of the front wheel 1 and the rear wheel 2 from the first time point to the second time point is detected, the slip ratio of the front wheel 1 and the rear wheel 2 from the second time point to the next third time point when the set time has elapsed The detection of the slip ratio of the front wheel 1 and the rear wheel 2 is continuously repeated.

(Setting between stocks at the start of planting work)
When planting work in a paddy field, the following operations are performed.
At the start of the planting operation, the operator sets (selects) the inter-set stock L 1 by the setting unit 64. When the planting operation is started in a state where the inter-stock L1 is set by the setting unit 64, an operation signal is output from the control unit 69 to the drive mechanism 67 corresponding to the inter-set stock L1, and the second transmission 45 are operated. At this time, the position of the drive arm is controlled based on the detection value of the detection sensor.

  At this stage, since the slips of the front wheel 1 and the rear wheel 2 are not taken into consideration, the shift position of the second transmission 45 is uniquely determined, and the second transmission 45 is set to the shift position corresponding to the set stock interval L1. Is operated.

  Since hydraulic oil may leak in the second transmission 45, the rotation speed of the output shaft 45b of the second transmission 45 is slightly lower than the rotation speed at the shift position corresponding to the set stock interval L1, The actual inter-stock Lx (corresponding to the supply interval) may be slightly larger than the set inter-stock L1 by this amount.

  In this case, the rotational speed of the output shaft 45b of the second transmission 45 corresponds to the set stock interval L1 based on the detection value of the work rotational speed detector 65 (the rotational speed of the output shaft 45b of the second transmission 45). The second transmission 45 is finely adjusted by the drive mechanism 67 in a state where the second transmission 45 is operated to the shift position corresponding to the set stock interval L1 so as to attain the rotation speed.

(Adjustment between stocks based on detection of front and rear wheel slip ratio in planting work)
As described above, when the second transmission 45 is operated to the shift position corresponding to the set stock interval L1, the slip ratio of the front wheel 1 and the rear wheel 2 is detected by the slip ratio detecting unit 68 as the planting operation progresses. Is detected, and the second transmission 45 is automatically operated as described below so that the actual inter-share Lx becomes the inter-set L1.

Based on the detection value of the work rotation speed detection unit 65 (the rotation speed of the output shaft 45 b of the second transmission 45) and the detection value of the traveling rotation speed detection unit 66 (the rotation speeds of the front wheel 1 and the rear wheel 2) The supply interval detection unit 73 detects an actual inter-strain Lx.
Specifically, the length corresponding to the slip ratio of the front wheel 1 and the rear wheel 2 is calculated, and the length corresponding to the slip of the front wheel 1 and the rear wheel 2 is deducted from the set stock L1. Lx is detected.

  An operation signal is output from the control unit 69 to the drive mechanism 67 so that the actual inter-stock Lx detected by the supply interval detection unit 73 becomes the set-interval stock L1, and the second transmission 45 is operated by the drive mechanism 67.

(Operation of variable speed transmission based on set stock)
When the set interval L1 set by the setting unit 64 is not particularly large and not particularly small, the operator is in a state in which the power by the constant velocity gears 58 and 60 is transmitted in the inconstant speed transmission 52 You may set it.

  When the set interval L1 set by the setting unit 64 is set to a particularly large one or a particularly small one, the operator slides the speed change member in the inconstant speed transmission 52, Among the non-uniform speed gears 59 and 61, the non-uniform speed gears 59 and 61 suitable for the set stock L1 set by the setting unit 64 may be selected (a state of connection to the transmission shaft 48 may be established).

  When the set strain L1 set by the setting unit 64 is set to a particularly large one, if the constant velocity gears 58 and 60 are used, the planting arm 8 takes out the seedlings A from the seedling stand 10, The rotational speed of the rotating case 7 becomes too slow in the area until the planting of the seedlings A into the chewing scene G by the arm 8. Therefore, if the inconstant speed gears 59, 61 suitable for the set stock L1 are selected, the rotational speed of the rotation case 7 can be slightly increased by the inequal speed transmission 52 in the above-mentioned area, and the seedlings A It can be made to plant on the surface G appropriately.

  When the setting strain L1 set by the setting unit 64 is set to a particularly small one, from the removal of the seedling A from the seedling platform 10 by the planting arm 8, the seedling scene G of the seedling A by the planting arm 8 In the area up to the planting, the rotational speed of the rotating case 7 becomes too high. Therefore, if the inconstant speed gears 59, 61 suitable for the set stock L1 are selected, the rotational speed of the rotation case 7 can be slightly reduced by the inequal speed transmission 52 in the above-mentioned area, and the seedling A is It can be made to plant on the surface G appropriately.

(Configuration to check the second transmission)
Among the power of the work transmission system, the second transmission 45 allows the normal rotation power to be transmitted to the seedling planting device 5, and controls the reverse power to be transmitted to the seedling planting device 5. A check mechanism K is provided.

  Specifically, the check control mechanism K is configured of a contact member 74 that performs a contact check on the shift arm 45d for operating the trunnion shaft 45c in the second transmission 45 so as to be operated in the reverse operation area. That is, as shown in FIG. 5, when the shift arm 45d swings from the neutral position in a predetermined direction (right direction in FIG. 5), the shift to the forward operation range is made. When the shift arm 45d swings from the neutral position in the direction opposite to the predetermined direction (left direction in FIG. 5), the shift operation region is switched. In the second transmission 45, the speed change arm 45d is switched to the normal rotation operation region, and the speed of the normal rotation power increases as the swing angle increases. The second transmission 45 can shift such that the speed of the reverse rotation power increases as the shift arm 45d switches to the reverse rotation operation region and the swing angle increases.

  However, the contact member 74 is provided at a position where the shift arm 45 d swings from the neutral position to the reverse operation area, and the contact member 74 causes the shift arm 45 d to move to the reverse operation area. It is configured to mechanically contact and check. Therefore, only the forward rotation power is transmitted from the second transmission 45 to the seedling planting device 5, and the reverse rotation power is not transmitted.

Further, the control device 63 is configured to control the drive mechanism 67 so as to switch the second transmission 45 to the neutral state when the main shift lever 30 is operated to the reverse travel side.
As shown in FIG. 5, a lever position sensor 75 formed of a potentiometer for detecting the swing operation position of the main shift lever 30 is provided at the swing fulcrum position of the main shift lever 30. The detection result of the lever position sensor 75 is input to the control device 63.

  When the control device 63 detects that the main transmission lever 30 has been operated to the neutral position based on the detection value of the lever position sensor 75, the control device 63 operates the drive mechanism 67 so that the second transmission 45 switches to the neutral state. The neutral position N of the main shift lever 30 may be any of the lowest speed position N1 of the forward operation area, the lowest speed position N2 of the reverse operation type, or an intermediate position thereof. When the main shift lever 30 is manipulated from the state of being operated in the forward operation area toward the reverse travel side and switched to the neutral position N, the second transmission 45 is switched to the neutral state.

[Another embodiment]
(1) In the above embodiment, although the check mechanism K is configured by the abutment member 74 that brings the shift arm 45d into operation in the reverse rotation operation zone, it is shown instead of this configuration. The drive arm 67B may be brought into contact with the transmission arm 45d and the rod 67c in an interlocking manner so as to control the operation of the drive arm 67B in the reverse operation area. Further, the check mechanism K is not limited to a configuration in which the shift arm 45d and the drive arm 67B are brought into contact with and regulated, and may be configured as follows. For example, in the output portion of the second transmission 45, when the rotating body for output rotates in the forward direction, its rotational power is transmitted to the transmission lower side, and when the rotating body for output rotates in the reverse direction, It may be configured to have a one-way rotation restricting mechanism that does not freely rotate and transmit the power to the transmission lower side.

(2) In the above embodiment, as an example of the main shift lever 30 being operated to the reverse travel side, when the main shift lever 30 is operated to the neutral position N, the second transmission 45 is switched to the neutral state Although the configuration is made to control, instead of this configuration, the second transmission 45 may be controlled to be switched to the neutral state when the main transmission lever 30 is operated reversely.

(3) In the above embodiment, the working device (seedling planting device 5) intermittently supplies the agricultural material (seedling) to the dredger scene at a supply interval set in advance along the traveling direction of the machine. However, instead of this configuration, the working device may be configured to continuously supply the agricultural material to the dredging scene along the traveling direction of the airframe. As described above, when the agricultural material is continuously supplied, it is possible to change and adjust the supply amount of agricultural material per unit time when continuously supplied by the shift of the second transmission 45.

(4) In the above embodiment, only the seedling planting device 5 as a working device is provided at the rear of the traveling machine body, but instead of this configuration, a field where seedlings are planted by the seedling planting device 5 A fertilizer application device for supplying fertilizer to the surface may be separately provided. And in providing a fertilization apparatus in this way, it is necessary to supply the motive power for a fertilization apparatus in parallel with a seedling planting apparatus. Therefore, a transmission mechanism for driving the fertilization apparatus may be provided inside the transmission case 20.

(5) In the said embodiment, although what applied to the riding type rice transplanter provided with the seedling planting apparatus 5 as a working apparatus was shown, this invention sets beforehand along the traveling direction of an aircraft as a working apparatus. The present invention can be applied to a paddy field work machine (ride type direct seeding machine) equipped with a sowing device for point-seeding seeds as agricultural material at a grazing scene at the supplied intervals. As described above, in the case of application to a passenger-type direct-sowing machine, it is possible to change the point-sowing interval along the traveling direction when seeding the seed in the weir scene by the speed change operation of the second transmission.

(6) In the said embodiment, although what showed supply of a seedling or a seed | species as an agricultural material was shown, it is good also as a structure which supplies a fertilizer, a chemical | medical agent, etc. to an indigo scene besides it.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a paddy field work machine that supplies agricultural materials such as seedlings, seeds, fertilizers, drugs and the like to a reed scene, such as a riding type rice planter and a riding type direct seeding machine.

1, 2 Wheels 5 Working Device 24 First Transmission 30 Gear Shifter 45 Second Transmission 45c Trunnion Shaft 45d Shift Arm 63 Control Unit 74 Contacting Member K Check Mechanism

Claims (6)

A first transmission to which power of the driving unit is transmitted;
A working device for supplying agricultural material to a bird's-eye view with a supply amount set in advance along the traveling direction of the vehicle;
A branch portion that branches the power of the first transmission into a traveling transmission system and a work transmission system;
A traveling wheel to which power of the traveling transmission system is transmitted;
A second transmission configured to shift the power of the work transmission system and transmit the power to the work device;
The second transmission is provided with a check mechanism that allows the normal transmission power of the power of the work transmission system to be transmitted to the work device, and also has a check mechanism that suppresses the reverse power to be transmitted to the work device. Paddy working machine being operated. The second transmission is constituted by a hydrostatic stepless transmission;
The said check mechanism is comprised by the contact member which carries out contact check control that the shift arm which operates the trunnion axis | shaft in the said hydrostatic continuously variable transmission is operated in a reverse operation area. Paddy working machine. A shift operating tool for changing and operating the shift state of the first transmission;
The paddy field work machine according to claim 1 or 2, further comprising: a control device for switching the second transmission to a neutral state when the gearshift operating tool is operated to the reverse travel side.   The paddy field work machine according to any one of claims 1 to 3, wherein the work device intermittently supplies the agricultural material to the dredging scene at a supply interval set in advance along the traveling direction of the vehicle.   The paddy field work machine according to claim 4, further comprising: a sowing device for point-seeding a seed as an agricultural material on a grazing scene at a supply interval set in advance along the traveling direction of the fuselage as the working device.   The paddy field work machine according to claim 4, further comprising: a seedling planting device for supplying a seedling as an agricultural material to a reed scene at a supply interval set in advance along the traveling direction of the machine as the work device. .

Images