JP6951232B2 - Paddy field work machine - Google Patents

Description

The present invention relates to a paddy field working machine that supplies agricultural materials such as seedlings, seeds, fertilizers and chemicals to a paddy field, such as a riding type rice transplanter and a riding type direct sowing machine.

Some passenger-type rice transplanters, which are examples of paddy field work machines, have a configuration as disclosed in Patent Document 1. In Patent Document 1, the power of the engine (corresponding to the driving part) is transmitted to the transmission, and the power of the transmission is branched in parallel and transmitted to the running wheels and the seedling planting device (corresponding to the working device). Has been done.

As a result, seedlings (corresponding to agricultural materials) are planted on the rice field by the seedling planting device between the stocks (corresponding to the supply interval) set in advance along the traveling direction of the aircraft, and the transmission is operated. Even if the traveling speed of the aircraft changes, the power transmitted to the seedling planting device is the power of the transmission, so that the stocks between the seedling planting devices are maintained at regular intervals.
In Patent Document 1, the power of the transmission is transmitted to the seedling planting device through the inter-strain transmission, and the inter-strain can be set to a desired interval by operating the inter-strain transmission.

Japanese Unexamined Patent Publication No. 2014-70653

In Patent Document 1, the inter-stock transmission is a gear transmission type with a plurality of gear shifting positions. In recent years, there has been an increasing demand for appropriately setting the supply interval according to the condition of paddy fields and agricultural materials.

INDUSTRIAL APPLICABILITY According to the present invention, the supply interval can be appropriately set in a paddy field work machine provided with a work device for intermittently supplying agricultural materials to a paddy field at a supply interval set in advance along the traveling direction of the machine. The purpose is to do so.

The paddy field working machine of the present invention
A transmission that transmits the power of the driving unit, an auxiliary transmission, a continuously variable transmission,
A mission case provided with the transmission, the auxiliary transmission, and the continuously variable transmission, and
It is equipped with a work device that intermittently supplies agricultural materials to the field surface at preset supply intervals along the traveling direction of the aircraft.
Inside the transmission case, the power of the transmission is branched in parallel to the traveling transmission system and the work transmission system, and the power of the traveling transmission system is transmitted to the traveling wheels through the auxiliary transmission. The power of the work transmission system is transmitted to the work device through the continuously variable transmission, and the power is transmitted to the work device.
On the downstream side of the continuously variable transmission inside the mission case, a working rotation speed detecting unit for detecting the rotation speed of the power from the continuously variable transmission is provided.

According to the present invention, the power of the work transmission system is transmitted to the working device through the continuously variable transmission device, and by operating the continuously variable transmission device, the maximum speed position and the minimum speed position of the continuously variable transmission device Many supply intervals can be set between and.
As a result, the supply interval can be finely and appropriately set according to the condition of the paddy field and agricultural materials, and the work accuracy of the paddy field working machine can be improved.

According to the present invention, a working rotation speed detecting unit for detecting the rotation speed of the power from the continuously variable transmission is provided on the downstream side of the continuously variable transmission.
As a result, the rotation speed of the power from the continuously variable transmission can be appropriately detected. Therefore, when operating the continuously variable transmission, the work is performed for detecting the operating position of the continuously variable transmission (for feedback). A rotation speed detection unit can be used.

For example, a hydraulic oil leak in a hydrostatic continuously variable transmission, a slip of a transmission belt in a belt-type continuously variable transmission, and the like, the continuously variable transmission is compared with a gear transmission type transmission. Power transmission loss may occur.

When the working rotation speed detection unit for detecting the rotation speed of the power from the continuously variable transmission is provided on the downstream side of the continuously variable transmission as in the present invention, the stepless transmission loss including the power transmission loss is included. Since the actual rotation speed of the transmission can be detected, the working rotation speed detection unit can be used for correcting the power transmission loss in the continuously variable transmission.

In the present invention
It is equipped with a non-constant speed transmission that changes the angular velocity of the output power with respect to the input power.
It is preferable that the power of the continuously variable transmission is transmitted to the working device through the non-constant speed transmission.

For example, in a passenger-type rice transplanter, which is an example of a paddy field work machine, if the space between stocks (supply interval) of the seedling planting device (working device) is set to a particularly large one or a particularly small one, the operating speed of the seedling planting device is set. (Rotation speed of the planting arm) may become too low or too high, and the seedlings may not be properly planted on the rice field.

According to the present invention, since the power of the stepless transmission is transmitted to the working device through the non-constant speed shifting device, the agricultural material is supplied to the field surface even when the operating speed of the working device is particularly low (high speed). The operating speed of the working device in the vicinity of the work device can be set to an appropriate value by the non-constant speed transmission.
As a result, for example, in the seedling planting apparatus, when the space between the plants is set to be particularly large or particularly small, it is possible to avoid a state in which the seedlings cannot be properly planted on the rice field surface.

In the present invention
On the downstream side of the continuously variable transmission and on the upstream side of the non-constant speed transmission, the working rotation speed detection unit is unequal to the portion where the power of the continuously variable transmission is decelerated by the transmission gear. It is preferable to detect the rotation speed of the transmission system with the speed transmission.

As described above, in the configuration in which the power of the continuously variable transmission is transmitted to the working device through the continuously variable transmission, according to the present invention, the continuously variable transmission is not affected by the continuously variable transmission. It is possible to appropriately detect the rotation speed of the power from.

In the present invention
It is preferable that the upstream side of the auxiliary transmission is provided with a traveling rotation speed detection unit that detects the rotation speed of the transmission system between the branch point of the traveling transmission system and the work transmission system and the auxiliary transmission. Is.

When detecting the rotation speed of the traveling transmission system, according to the present invention, the rotation speed of the transmission system between the branch point of the traveling transmission system and the work transmission system and the auxiliary transmission system is traveled on the upstream side of the auxiliary transmission system. It is detected by the rotation speed detection unit.

As a result, the rotation speed of the traveling transmission system can be detected in a high-speed state before being decelerated by the auxiliary transmission, and the rotation speed of the traveling transmission system can be detected accurately. The detected rotation speed of the traveling transmission system can be effectively used for displaying the traveling speed of the machine body and operating the continuously variable transmission of the work transmission system.

In the present invention
It is preferable that the continuously variable transmission is a hydrostatic type continuously variable transmission.

According to the present invention, since the continuously variable transmission is a hydrostatic continuously variable transmission, by operating the hydrostatic continuously variable transmission, the power transmitted to the working device is slightly shifted to the high speed side. It is possible to make small shifts without difficulty, such as shifting to a slightly lower speed side.

It is a side view of a passenger-type rice transplanter. It is a top view of a passenger-type rice transplanter. It is a cross-sectional plan view which shows the vicinity of a traveling transmission system in a mission case. It is a cross-sectional plan view which shows the vicinity of a work transmission system in a mission case. It is a figure which shows the linkage state of a control device and each part. It is a side view of a mission case. It is a bottom view of a mission case.

In the embodiment of the present invention, a passenger-type rice transplanter, which is an example of a paddy field working machine that performs planting work in a paddy field, is shown.
Unless otherwise specified, the front-rear direction and the left-right direction in the embodiment of the present invention are described as follows. When the aircraft 11 is traveling, the traveling direction on the forward side is "forward", and the traveling direction on the reverse side is "rear". The direction corresponding to the right side is "right" and the direction corresponding to the left side is "left" with respect to the forward posture in the front-back direction.

(Overall configuration of passenger rice transplanter)
As shown in FIGS. 1 and 2, the passenger-type rice transplanter is an aircraft equipped with right and left front wheels 1 (corresponding to running wheels) and right and left rear wheels 2 (corresponding to running wheels). A hydraulic cylinder 4 for raising and lowering the link mechanism 3 and the link mechanism 3 is provided at the rear portion of 11, and a seedling planting device 5 (corresponding to a working device) is supported at the rear portion of the link mechanism 3.

The seedling planting device 5 includes a planting transmission case 6 arranged at predetermined intervals in the left-right direction, a rotating case 7 rotatably supported on the right and left sides of the rear portion of the planting transmission case 6, and a rotating case. A pair of planting arms 8, a float 9, a seedling stand 10 and the like provided at both ends of the 7 are provided.

Right and left markers 12 are provided on the right and left lateral sides of the seedling planting device 5. The marker 12 can be changed to an action posture (see FIG. 1) in contact with the rice field surface G (see FIG. 5) and a retracted posture in which the marker 12 is separated upward from the rice field surface G, and the rotating body 12a can rotate at the tip of the marker 12. Is supported by. In the acting posture of the marker 12, the rotating body 12a of the marker 12 comes into contact with the field surface G, and the rotating body 12a of the marker 12 forms an index on the field surface G while rotating as the aircraft 11 travels.

(Structure near the driver)
As shown in FIGS. 1 and 2, the airframe 11 is provided with a driver's seat 13 and a steering steering wheel 14 for steering and operating the front wheels 1.

Right and left support frames 16 are provided on the right and left portions of the front portion of the machine body 11, and the spare seedling rest 15 is supported by the support frame 16. A support frame 17 is connected over the upper part of the right and left support frames 16.

In the support frame 17, the measuring device 18 is attached to a portion of the support frame 17 located at the left and right center CL of the machine body 11 in a plan view. The measuring device 18 is provided with a receiving device (not shown) for acquiring position information by a satellite positioning system and an inertial measurement device (not shown) for detecting the inclination (pitch angle and roll angle) of the airframe 11. The measuring device 18 outputs positioning data indicating the position of the machine body 11.

In the rear axle case 22 that supports the right and left rear wheels 2, an inertial measurement unit 19 that measures inertial information is attached to a portion located at the left and right center CL of the airframe 11 in a plan view. The inertial measurement of the inertial measurement unit 19 and the measuring device 18 is configured by an IMU (Inertial Measurement Unit).

A typical example of the above-mentioned satellite positioning system (GNSS: Global Navigation Satellite System) is GPS (Global Positioning System). GPS is a receiving device of the measuring device 18 by using a plurality of GPS satellites orbiting the earth, a control station that tracks and controls GPS satellites, and a receiving device provided in a positioning target (airframe 11). It measures the position of.

The inertial measurement unit 19 includes a gyro sensor (not shown) capable of detecting the angular velocity of the yaw angle of the machine body 11 and an acceleration sensor (not shown) that detects accelerations in three axial directions orthogonal to each other. The inertial information measured by the inertial measurement unit 19 includes directional change information detected by the gyro sensor and position change information detected by the acceleration sensor.
As a result, the position of the airframe 11 and the orientation of the airframe 11 are detected by the measuring device 18 and the inertial measurement unit 19.

(Configuration near the mission case)
As shown in FIG. 1, a mission case 20 is supported on the front portion of the airframe 11, and right and left front wheels 1 are attached to a front axle case 21 connected to the right and left lateral sides of the mission case 20. Is supported. The rear axle case 22 is supported by the rear portion of the fuselage 11, and the right and left rear wheels 2 are supported by the rear axle case 22.

As shown in FIGS. 1 and 3, an engine 23 (corresponding to a prime mover) is supported at the front of the mission case 20. A hydrostatic type continuously variable transmission 24 (corresponding to a transmission) is connected to the left lateral side of the transmission case 20, and the power of the engine 23 is input to the continuously variable transmission 24 via the transmission belt 25. It is transmitted to the shaft 24a.

The continuously variable transmission 24 is configured to be steplessly variable in the neutral position, the forward side and the reverse side, and the continuously variable transmission 24 is operated by the shift lever 30 provided on the left lateral side of the steering wheel 14. Manipulate.

As shown in FIGS. 6 and 7, a plurality of fins 20a along the vertical direction are provided on the outer surface of the right and left side wall portions of the mission case 20. A plurality of fins 20b along the front-rear direction are provided on the outer surface of the bottom of the mission case 20. The fins 20a and 20b of the mission case 20 promote heat dissipation of the mission case 20 and suppress a temperature rise of the hydraulic oil inside the mission case 20.

Since the fins 20a of the mission case 20 are aligned in the vertical direction, even if mud is about to adhere to the fins 20a of the mission case 20, the mud easily falls downward. Since the fins 20b of the mission case 20 are aligned in the front-rear direction, the mud that has been blown from the front wheels 1 to the rear side is unlikely to stay in the fins 20b of the mission case 20.

(Structure of running transmission system to front wheels and rear wheels)
As shown in FIG. 3, a pump 26 is connected to the right lateral side of the mission case 20, and the pump 26 supplies hydraulic oil to the hydraulic cylinder 4. The input shaft 24a of the continuously variable transmission 24 is inserted into the transmission case 20, and the transmission shaft 27 is connected to the input shaft 26a of the pump 26 and the input shaft 24a of the continuously variable transmission 24.

Inside the transmission case 20, transmission shafts 28 and 29 are supported along the left-right direction, and the output shaft 24b of the continuously variable transmission 24 is connected to the end of the transmission shaft 28. Inside the transmission case 20, a gear shifting type auxiliary transmission 31 is provided over 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 integrally rotated and slidably fitted to the transmission shaft 29 by a spline structure. The shift gear 34 can be slid and operated by an auxiliary transmission 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 in a low speed state, and when the shift gear 34 is engaged with the high speed gear 33, the power of the transmission shaft 28 is transmitted. It is transmitted to the transmission shaft 29 in a high speed state.
When the planting work is performed in the paddy field, the auxiliary transmission 31 is operated at a low speed, and when traveling at a 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, which transmit power to the right and left front wheels 1, are supported over the mission case 20 and the front axle case 21, and the front wheel differential device is located between the right and left front axles 35. 36 is provided. The transmission gear 37 connected to the transmission shaft 29 and the transmission gear 38 connected to the case 36a of the front wheel differential device 36 are in mesh with each other.

The output shaft 39 is supported in the rear portion of the transmission case 20 along the front-rear direction, and the bevel gear 40 connected to the case 36a of the front wheel differential device 36 and the bevel gear 39a formed in the front portion of the output shaft 39 mesh with each other. doing.

As shown in FIGS. 1 and 3, a transmission shaft 41 is connected to the rear portion of the output shaft 39 via a universal joint (not shown), and the rear portion of the transmission shaft 41 is connected to a universal joint (not shown). It is connected to the input shaft (not shown) of the rear axle case 22 via.

With the above configuration, the power shifted by the continuously variable transmission 24 is transferred from the output shaft 24b of the continuously variable 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 the 36 and the front axle 35.
The power transmitted to the front wheel differential device 36 is transmitted to the right and left rear wheels via the bevel gear 40, the output shaft 39 (bevel gear 39a), the transmission shaft 41, and the transmission shaft (not shown) inside the rear axle case 22. It is transmitted to 2.

A multi-plate type brake 42 is fitted on the output shaft 39, and the brake 42 can be operated in 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 wheels 1 and the rear wheels 2 can be braked.

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

With the above configuration, the power of the continuously variable transmission 24 (transmission device) is branched in parallel to the traveling transmission system and the work transmission system, and the power of the traveling transmission system is the front wheels 1 and the rear wheels 2 (wheels for traveling). It is in a state of being transmitted to.
The power of the traveling transmission system is transmitted to the front wheels 1 and the rear wheels 2 (wheels for traveling) through the auxiliary transmission 31.

(Structure of work transmission system to seedling planting device)
As shown in FIG. 4, a hydrostatic type continuously variable transmission 45 is connected to the right lateral side of the transmission case 20, and the input shaft 45a of the continuously variable transmission 45 and the transmission shaft 28 are connected to each other. ing. The input shaft 45a of the continuously variable transmission 45 projects to the opposite side of the transmission case 20, and the fan 46 that sends cooling air to the continuously variable transmission 45 is connected to the protruding portion of the input shaft 45a of the continuously variable transmission 45. ing.

The transmission shaft 47 is connected to the output shaft 45b of the continuously variable transmission 45. Inside the transmission case 20, transmission shafts 48 and 49 are supported along the left-right direction, and the end portion of the transmission shaft 49 is supported so as to be concentric with the transmission shaft 47 so as to be relatively rotatable.

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

Inside the transmission case 20, a gear shifting type non-constant speed transmission 52 is provided over the transmission shafts 48 and 49, and a bevel gear 53 is connected to the transmission shaft 48. The output shaft 54 is supported at the rear portion of the transmission case 20 along the front-rear direction, the bevel gear 55 is externally fitted to the front portion of the output shaft 54 via the planting clutch 56, and the bevel gears 53 and 55 are occluded. ..

As shown in FIGS. 1 and 4, a transmission shaft 57 is connected to the rear portion of the output shaft 54 via a universal joint (not shown), and the rear portion of the transmission shaft 57 is connected to a universal joint (not shown). It is connected to an input shaft (not shown) of the seedling planting device 5 via.

With the above configuration, the power shifted by the continuously variable transmission 24 is transferred from the output shaft 24b of the continuously variable transmission 24 via the transmission shaft 28 and the input shaft 45a of the continuously variable transmission 45 to the continuously variable transmission 45. Is transmitted to.

The power transmitted by the stepless transmission 45 is transmitted from the output shaft 45b of the stepless transmission 45 to the transmission shaft 47 (transmission gear 47a), transmission gears 50, 51, transmission shaft 49, non-constant speed transmission 52, and transmission. It is transmitted to the seedling planting device 5 via the shaft 48, the 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 in the transmission state, power is transmitted to the seedling planting device 5 to operate the seedling planting device 5.
When the seedling planting device 5 is activated, as shown in FIG. 2, the rotary case 7 is rotationally driven in the counterclockwise direction of FIG. A set of planting arms 8 alternately take out seedlings A (corresponding to agricultural materials) from the lower part of the seedling stand 10 and plant them on the rice field G. As a result, as shown in FIG. 5, the seedling A is intermittently planted on the rice field G along the traveling direction F1 of the machine body 11 at the preset inter-strain L1 (corresponding to the supply interval).
When the planting clutch 56 is operated in the cut-off state, the power to the seedling planting device 5 is cut off, the seedling planting device 5 is stopped, and the seedling rest 10 and the rotary case 7 are stopped.

With the above configuration, the power of the continuously variable transmission 24 (transmission device) is branched in parallel to the traveling transmission system and the work transmission system, and the power of the work transmission system is transferred to the continuously variable transmission 45 and the non-constant speed transmission 52. It is in a state of being transmitted to the seedling planting device 5 (working device) through the seedling planting device 5.

(Structure of non-constant speed transmission)
As shown in FIG. 4, the non-constant speed transmission 52 includes a constant speed gear 58 and a non-constant speed gear 59 connected to a transmission shaft 49, a constant speed gear 60 externally fitted to the transmission shaft 48 so as to be relatively rotatable, and the constant speed gear 60. The non-constant speed gear 61 is provided, the constant speed gears 58 and 60 are occluded, and the non-constant speed gears 59 and 61 are occluded.

The speed change member 62 is slidably supported inside the transmission shaft 48, and the speed change member 62 is slidably operated to engage the ball with the constant speed gear 60 and the non-uniform speed gear 61, thereby engaging the ball. The constant velocity gear 60 and the non-constant velocity gear 61 can be connected to the transmission shaft 48.

The constant velocity gears 58 and 60 are circular gears and have the same diameter. As a result, when the ball is engaged with the constant velocity gear 60 by the speed change member 62, the power of one rotation of the transmission shaft 49 is transmitted to the transmission shaft 48 as the power of one rotation in the constant velocity state of the angular velocity.

The non-constant speed gears 59 and 61 are elliptical gears, eccentric gears or non-circular gears. As a result, when the ball is engaged with one of the non-constant speed gears 61 by the transmission member 62, 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 or low in one rotation.

When the non-constant speed gears 59 and 61 are eccentric gears, a plurality of dislocations of gear teeth are set in one eccentric gear, and the dislocations are set to be different depending on the gear teeth. As a result, the variation in the backlash of the non-constant speed gears 59 and 61 can be reduced, and the power transmission by the non-uniform speed gears 59 and 61 can be made smooth.

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

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

As shown in FIGS. 4 and 5, a gear tooth-shaped rotating body 49a is connected to the transmission shaft 49 so as to rotate integrally with the transmission shaft 49. A pickup sensor type working rotation speed detecting unit 65 is provided for the rotating body 49a of the transmission shaft 49, and the detection value of the working rotation speed detecting unit 65 is input to the control device 63.

As a result, on the downstream side of the continuously variable transmission 45 and on the upstream side of the continuously variable transmission 52, the transmission system (transmission shaft 49) between the continuously variable transmission 45 and the continuously variable transmission 52 The rotation speed is detected by the working rotation speed detection unit 65 as the rotation speed of the power from the continuously variable transmission 45, and is input to the control device 63.

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

As a result, on the upstream side of the auxiliary transmission 31, the traveling speed detection unit 66 detects the rotation speed of the transmission system between the branch point (transmission shaft 28) of the traveling transmission system and the work transmission system and the auxiliary transmission 31. Is in a state of being equipped.

An electric motor type actuator 67 for operating the continuously variable transmission 45 by changing the angle of the slanted plate (not shown) of the continuously variable transmission 45 is provided, and an operation signal is output from the control device 63 to the actuator 67. Will be done.

The control device 63 includes a slip rate detection unit 68, a control unit 69, a timer 70, a first mileage detection unit 71, a second mileage detection unit 72, and a supply interval detection unit 73 as software.

(Detection of slip ratio)
When the planting work is performed in the paddy field, slip occurs in the front wheels 1 and the rear wheels 2, so that the slip rate detection unit 68 detects the slip rate as described below.

In this case, the state in which the front wheels 1 and the rear wheels 2 have slipped means that the front wheels 1 and the rear wheels 2 are idling, and the aircraft 11 advances in spite of the fact that the front wheels 1 and the rear wheels 2 are rotating. It is in a state where it is not done.

In the planting operation, a certain first time point and a second time point after the set time has elapsed from the first time point are detected by the timer 70.
From the first time point to the second time point, the actual mileage of the machine body 11 is determined by the first mileage detection unit 71 based on the detection of the position of the machine body 11 and the orientation of the machine body 11 by the measuring device 18 and the inertial measurement unit 19. Detected. In this case, the detection value of the first mileage detection unit 71 includes slip of the front wheels 1 and the rear wheels 2.

From the first time to the second time, the second mileage detection unit 72 is based on the outer diameters of the front wheels 1 and the rear wheels 2 and the detection values of the traveling speed detection unit 66 (rotations of the front wheels 1 and the rear wheels 2). The mileage of the aircraft 11 is detected (calculated). In this case, the detection value of the second mileage detection unit 72 does not include the slip of the front wheels 1 and the rear wheels 2.

The slip ratio detection unit 68 compares the detection value of the first mileage detection unit 71 with the detection value of the second mileage detection unit 72.
When the front wheels 1 and the rear wheels 2 are slipped, the detection value of the first mileage detection unit 71 becomes smaller than the detection value of the second mileage detection unit 72, and the first mileage detection unit 72 It can be determined that the larger the difference between the detected values of the 71 and the second mileage detecting unit 72, the more the front wheels 1 and the rear wheels 2 slip.

As a result, the slip ratio is detected by the slip ratio detection unit 68 based on the detection value of the first mileage detection unit 71 and the detection value of the second mileage detection unit 72.
When the slip ratio from the first time point to the second time point is detected, the slip rate from the second time point to the next third time point after the set time has elapsed is detected, and the slip rate is continuously detected. It is repeated.

(Setting between stocks at the start of planting work)
When planting in paddy fields, the following operations are performed.
At the start of the planting work, the operator sets (selects) the set inter-stock L1 by the setting unit 64 as described in the above-mentioned (configuration of the control system for operating the continuously variable transmission).

When the planting work is started in the state where the set inter-stock L1 is set by the setting unit 64, an operation signal is output from the control unit 69 to the actuator 67 in response to the set inter-stock L1, and the stepless transmission 45 is output by the actuator 67. Is operated.
At this stage, since the slip of the front wheels 1 and the rear wheels 2 is not taken into consideration, the shifting position of the continuously variable transmission 45 is uniquely determined, and the continuously variable transmission 45 is set at the shifting position corresponding to the set inter-stock L1. Is operated.

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

In this case, the rotation speed of the output shaft 45b of the continuously variable transmission 45 corresponds to the set inter-stock L1 based on the detection value of the working rotation speed detection unit 65 (the rotation speed of the output shaft 45b of the continuously variable transmission 45). The continuously variable transmission 45 is finely adjusted by the actuator 67 at the shift position corresponding to the set inter-stock L1 so as to have the rotation speed.

(Adjustment between strains based on detection of slip rate in planting work)
As the planting work progresses, the continuously variable transmission 45 is as described below so that the actual inter-strain L becomes the set inter-strain L1 as the slip ratio is detected by the slip ratio detection unit 68. Is automatically operated.

As described in the previous section (setting between stocks at the start of planting work), in a state where the continuously variable transmission 45 is operated to the shift position corresponding to the set stock L1 as the planting work progresses, As described in the previous section (Detection of slip ratio), the slip ratio is detected by the slip ratio detection unit 68.

Based on the detection value of the working rotation speed detection unit 65 (the rotation speed of the output shaft 45b of the continuously variable transmission 45) and the detection value of the traveling rotation speed detection unit 66 (the rotation speed of the front wheels 1 and the rear wheels 2). The supply interval detection unit 73 detects the actual inter-strain L.
Specifically, the length corresponding to the slip ratio is calculated, the length corresponding to the slip ratio is subtracted from the set inter-stock L1, and the actual inter-stock L is detected.

As a result, an operation signal is output from the control unit 69 to the actuator 67 so that the actual inter-stock L detected by the supply interval detection unit 73 becomes the set inter-stock L1, and the actuator 67 operates the continuously variable transmission 45. ..

(Operation of non-constant speed transmission based on set stocks)
When the set inter-stock L1 set by the setting unit 64 is not particularly large or particularly small, the operator transmits power by the constant speed gears 58 and 60 in the non-constant speed transmission 52. You just have to set the state.

When the set inter-stock L1 set by the setting unit 64 is particularly large or particularly small, the operator slides the transmission member 62 in the unequal speed transmission 52 to operate the unequal speed gear. Of the 59 and 61, the non-constant speed gears 59 and 61 suitable for the set inter-stock L1 set by the setting unit 64 may be selected (the gears 59 and 61 may be connected to the transmission shaft 48).

When the set inter-stock L1 set by the setting unit 64 is particularly large, the rotation speed of the rotating case 7 becomes too low.
As a result, in the region from the removal of the seedling A from the seedling stand 10 by the planting arm 8 to the planting of the seedling A on the field surface G by the planting arm 8, the rotating case 7 is provided by the non-constant speed transmission 52. The rotation speed can be increased a little, and the seedling A can be appropriately planted on the rice field G.

When the set inter-stock L1 set by the setting unit 64 is particularly small, the rotation speed of the rotating case 7 becomes too high.
As a result, in the region from the removal of the seedling A from the seedling stand 10 by the planting arm 8 to the planting of the seedling A on the field surface G by the planting arm 8, the rotating case 7 is provided by the non-constant speed transmission 52. The rotation speed can be made a little slower so that the seedling A can be properly planted on the rice field G.

(First alternative form of carrying out the invention)
In the above-mentioned (setting between stocks at the start of planting work), the continuously variable transmission 45 is finely moved by the actuator 67 at the speed change position corresponding to the set stock-to-stock L1 based on the leak of the hydraulic oil of the continuously variable transmission 45. It is not necessary to perform the adjustment operation.

With this configuration, when the actual inter-stock L is detected by the supply interval detection unit 73 in the above-mentioned (adjustment between stocks based on the detection of the slip ratio in the planting work), the hydraulic oil of the continuously variable transmission 45 The actual inter-stock L is detected by the supply interval detection unit 73 in a state where both the leak and the slip of the front wheels 1 and the rear wheels 2 are taken into consideration.

In this case, when the leak of the hydraulic oil of the continuously variable transmission 45 is small and the slip of the front wheels 1 and the rear wheels 2 is large, the actual inter-stock L may be smaller than the set inter-stock L1 set by the setting unit 64. be.
On the contrary, when the leak of the hydraulic oil of the continuously variable transmission 45 is large and the slip of the front wheels 1 and the rear wheels 2 is small, the actual inter-stock L may be larger than the set inter-stock L1 set by the setting unit 64. ..

(Second alternative form of carrying out the invention)
The measuring device 18 and the inertial measurement unit 19 may be abolished.
In this configuration, when the first mileage detection unit 71 detects the actual mileage of the machine body 11, a rotation speed sensor (not shown) is provided on the rotating body 12a of the marker 12, and as the machine body 11 travels, The actual mileage of the machine body 11 may be detected by detecting the number of rotations when the rotating body 12a of the marker 12 touches the field surface G and rotates.

Instead of the rotating body 12a of the marker 12, a dedicated rotating body (not shown) that rotates in contact with the field surface G is provided on the machine body 11 or the seedling planting device 5 to detect the rotation number of the rotating body. It may be configured as follows.

(Third alternative form of carrying out the invention)
In the setting unit 64, the worker may be configured to set (select) one set inter-stock L1 from a plurality of different set inter-stock L1s.

(Fourth alternative form of carrying out the invention)
Instead of the operator manually operating the non-constant speed transmission 52, the non-uniform speed transmission 52 is automatically operated to an appropriate operation position based on the setting (selection) of the set inter-stock L1 by the setting unit 64. It may be configured to be.

(Fifth alternative form of carrying out the invention)
In the mission case 20, the continuously variable transmission 24 may be provided on the right lateral side of the mission case 20, and the continuously variable transmission 45 may be provided on the left lateral side of the mission case 20.

Instead of the continuously variable transmission 24, a gear transmission type transmission (not shown) having a plurality of transmission positions may be provided. Instead of the hydrostatic type continuously variable transmission 45, a beltless type continuously variable transmission 45 may be provided.

Inside the mission case 20, the transmission shafts 28, 29, 47, 48, 49 and the like may be arranged in the front-rear direction instead of the left-right direction.
Instead of the engine 23, an electric motor (not shown) may be used as the driving unit.

(Sixth Alternative Form of Implementation of the Invention)
As shown in FIG. 4, inside the mission case 20, the working rotation speed detection unit 65 is configured to detect the rotation speed of the transmission shaft 47 (transmission gear 47a) and the rotation speed of the transmission gears 50 and 51. You may.

Inside the transmission case 20, the power of the transmission shaft 28 is transmitted to the intermediate transmission shaft (not shown) via a transmission gear (not shown), and an auxiliary transmission is used between the intermediate transmission shaft and the transmission shaft 29. 31 may be provided.
In this structure, the traveling rotation speed detecting unit 66 may be configured to detect the rotation speed of the intermediate transmission shaft.

(7th alternative form of carrying out the invention)
For example, when the total amount of seedlings A to be used is determined in one paddy field, the actual inter-strain L is finely adjusted so that the seedlings A corresponding to this total amount are planted on the paddy field G in just proportion. Is possible.

When performing the above-mentioned work, if data on the area of the paddy field and data on the planting process, such as the route on which the aircraft 11 is run for the planting work, are acquired in advance, these data and The required inter-strain L is calculated based on the total amount of seedlings A.

As a result, when the worker sets (selects) the set inter-stock L1 by the setting unit 64, if the set inter-stock L1 set by the setting unit 64 deviates significantly from the required inter-stock L described above, the required inter-stock L1 is required. It is notified to the worker that the setting unit 64 should set the setting inter-stock L1 close to (to alert the worker and prevent misunderstanding).
When the planting operation is started in the above-mentioned state, the continuously variable transmission 45 is automatically operated so that the actual inter-stock L becomes the required inter-stock L described above.

(Eighth alternative form of carrying out the invention)
For example, one paddy field may be divided into small areas, and the growth state and yield of rice in the previous year may be accumulated as data in each area of the paddy field.
In the above-mentioned state, when the next year's planting work is carried out in the same paddy field, the planting work is carried out at the actual inter-strain L suitable for each of the paddy field areas based on the detection of the measuring device 18 and the inertial measurement unit 19. It is also possible that the continuously variable transmission 45 is automatically operated so that the above is performed.

The present invention can be applied not only to a riding-type rice transplanter but also to a riding-type direct sowing machine provided with a sowing device (corresponding to a working device) for supplying seeds (corresponding to agricultural materials) to the rice field surface G. The present invention provides a fertilizer application device (corresponding to a working device) that supplies fertilizer (corresponding to agricultural materials) to the paddy field G, and a chemical supply device (corresponding to a working device) that supplies chemicals (corresponding to agricultural materials) to the paddy field G. It can also be applied to the equipped paddy field work machine.

1 Front wheel (wheel)
2 Rear wheels (wheels)
5 Seedling planting device (working device)
11 Airframe 20 Mission Case 23 Engine (Motor)
24 Continuously variable transmission (transmission device)
31 Sub-transmission device 45 Continuously variable transmission
47a Transmission gear
50 Transmission gear
51 Transmission gear 52 Non-constant speed transmission 65 Working rotation speed detection unit 66 Traveling rotation speed detection unit A Seedling (agricultural material)
G Tamen L Between stocks (supply interval)
Between L1 set stocks (supply interval)

Claims (5)

A transmission that transmits the power of the driving unit, an auxiliary transmission, a continuously variable transmission,
A mission case provided with the transmission, the auxiliary transmission, and the continuously variable transmission, and
It is equipped with a work device that intermittently supplies agricultural materials to the field surface at preset supply intervals along the traveling direction of the aircraft.
Inside the transmission case, the power of the transmission is branched in parallel to the traveling transmission system and the work transmission system, and the power of the traveling transmission system is transmitted to the traveling wheels through the auxiliary transmission. The power of the work transmission system is transmitted to the work device through the continuously variable transmission, and the power is transmitted to the work device.
A paddy field working machine provided with a working rotation speed detecting unit for detecting the rotation speed of power from the continuously variable transmission on the downstream side of the continuously variable transmission inside the mission case. It is equipped with a non-constant speed transmission that changes the angular velocity of the output power with respect to the input power.
The paddy field working machine according to claim 1, wherein the power of the continuously variable transmission is transmitted to the working device through the non-constant speed transmission. On the downstream side of the continuously variable transmission and on the upstream side of the non-constant speed transmission, the working rotation speed detection unit is unequal to the portion where the power of the continuously variable transmission is decelerated by the transmission gear. The paddy field working machine according to claim 2, wherein the rotation speed of the transmission system to and from the speed transmission device is detected. A claim that a traveling rotation speed detection unit for detecting the rotation speed of the transmission system between the branch point of the traveling transmission system and the work transmission system and the auxiliary transmission is provided on the upstream side of the auxiliary transmission. The paddy field working machine according to any one of 1 to 3. The paddy field working machine according to any one of claims 1 to 4, wherein the continuously variable transmission is a hydrostatic type continuously variable transmission.

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