Work vehicles

Abstract

To solve the problem that work vehicles such as rice planting machine are known; in view of various needs of users of work vehicles, the present inventor considers that a trend of mounting convenient functions on such work vehicles one after another is accelerated; however, the present inventor has found that the work vehicles such as the above-mentioned conventional rice planting machine are not always easy to use when using the convenient functions.SOLUTION: Provided is a rice transplanter including a fertilization device 250 which adjusts amounts of fertilization by driving a fertilization driving part 600 using a motor 500, the motor 500 transmitting power to the fertilization driving part 600 through a gear mechanism 700.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a work vehicle such as a rice transplanter. [Background technology]

[0002] 2. Description of the Related Art A work vehicle such as a rice planter is known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-110789 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the present inventor believes that the trend of implementing convenient functions one after another in such work vehicles will continue to accelerate in consideration of the various needs of work vehicle users.

[0005] However, the present inventors have noticed that work vehicles such as the above-mentioned conventional rice transplanters are not necessarily easy to use when using convenient functions.

[0006] SUMMARY OF THE PRESENT DISCLOSURE In consideration of the above-mentioned problems with the conventional technology, an object of the present invention is to provide a work vehicle that can improve usability. [Means for solving the problem]

[0007] The first aspect of the present invention is The present invention includes a fertilizer applicator (250) that adjusts the amount of fertilizer applied by driving a fertilizer drive unit (600) using a motor (500), The motor (500) transmits power to the fertilizer application drive unit (600) via a gear mechanism (700); The gear mechanism (700) includes a motor drive shaft gear (710) attached to a motor drive shaft (510) rotated by the motor (500) and a fertilizer drive unit gear (720) attached to the fertilizer drive unit (600), A state in which the fertilizer drive gear (720) meshes with the motor drive shaft gear (710) and a state in which the fertilizer drive gear (720) does not mesh with the motor drive shaft gear (710) are switchable; A controller (300); A fertilizer drive unit state sensor (610) for detecting the state of the fertilizer drive unit (600); Equipped with This work vehicle is characterized in that the controller (300) outputs a warning when it determines, based on detection by the fertilizer application drive unit status sensor (610), that the fertilizer application drive unit (600) is not operating even though the power is being transmitted from the motor (500). The second aspect of the present invention is A vehicle speed sensor (430) is provided to detect the vehicle speed. The work vehicle of the first aspect of the present invention is characterized in that the controller (300) controls the motor (500) based on detection by the vehicle speed sensor (430). The third aspect of the present invention is The motor (500) also transmits the power to the seedling planting device (240); A battery (830) that functions as a power source for the motor (500) is housed inside the case (840) together with the motor (500), The fertilizer whose amount is adjusted is a paste fertilizer, This is a second work vehicle of the present invention, characterized in that the fertilizer taken out of the fertilizer application device (250) by driving the fertilizer application drive unit (600) is sent via a fertilizer application selector (850) to one of a first fertilizer path (861) passing through the interior of the case (840) and a second fertilizer path (862) that does not pass through the interior of the case (840). The fourth aspect of the present invention is the first fertilizer path (861) is connected to the second fertilizer path (862) at a fertilizer path connection point (863) downstream outside the case (840); This is a third work vehicle of the present invention, characterized in that the seedling planting device (240) and the fertilizer application device (250) are connected to a fertilizer distributor (870) provided downstream of the fertilizer path connection point (863). The fifth aspect of the present invention is A first temperature sensor (841) for detecting the temperature inside the case (840); a second temperature sensor (871) for detecting the temperature of the fertilizer entering the fertilizer dispenser (870); Equipped with This is a fourth work vehicle of the present invention, characterized in that the controller (300) determines the route selection of the fertilizer selector (850) and the distribution ratio of the fertilizer distributor (870) based on the detection of the first temperature sensor (841) and the second temperature sensor (871). The first invention related to the present invention The fertilizer application device (250) is provided for applying fertilizer in an adjustable amount by driving a fertilizer application drive unit (600) using a motor (500). The motor (500) of the work vehicle transmits power to the fertilizer application drive unit (600) via a gear mechanism (700).

[0008] The second invention related to the present invention The gear mechanism (700) has a motor drive shaft gear (710) attached to the motor drive shaft (510) of the motor (500) and a fertilizer drive unit gear (720) attached to the fertilizer drive unit (600), The fertilizer driving gear (720) is capable of switching between a state where it meshes with the motor drive shaft gear (710) and a state where it does not mesh with the motor drive shaft gear (710). The first invention related to the present invention It is a work vehicle.

[0009] The third invention related to the present invention A controller (300) and A fertilizer drive unit state sensor (610) for detecting the state of the fertilizer drive unit (600); Equipped with The controller (300) outputs a warning when it is determined that the fertilizer application drive unit (600) is not operating despite the power being transmitted from the motor (500) based on the detection of the fertilizer application drive unit state sensor (610). The second invention related to the present invention It is a work vehicle.

[0010] The fourth invention related to the present invention is provided with a vehicle speed sensor (430) for detecting a vehicle speed, The controller (300) controls the motor (500) based on the detection of the vehicle speed sensor (430). The third invention related to the present invention It is a work vehicle.

[0011] Fifth Invention Related to the Present Invention The motor (500) also transmits the power to the seedling planting device (240), A battery (830) that functions as a power source for the motor (500) is housed inside the case (840) together with the motor (500), The fertilizer whose amount is adjusted is a paste fertilizer, The fertilizer taken out from the fertilizer application device (250) by the drive of the fertilizer application drive unit (600) is delivered via a fertilizer application selector (850) to one of a first fertilizer path (861) passing through the inside of the case (840) and a second fertilizer path (862) not passing through the inside of the case (840). The fourth invention related to the present invention It is a work vehicle.

[0012] The sixth invention related to the present invention the first fertilizer path (861) is connected to the second fertilizer path (862) at a fertilizer path connection point (863) downstream outside the case (840); The seedling planting device (240) and the fertilizer applicator (250) are connected to a fertilizer distributor (870) provided downstream of the fertilizer path connection point (863). A work vehicle according to a fifth aspect of the present invention It is.

[0013] The seventh invention related to the present invention a first temperature sensor (841) for detecting the temperature inside the case (840); a second temperature sensor (871) for detecting the temperature of the fertilizer entering the fertilizer dispenser (870); Equipped with The controller (300) determines the route selection of the fertilizer selector (850) and the distribution ratio of the fertilizer distributor (870) based on the detection of the first temperature sensor (841) and the second temperature sensor (871). The sixth invention related to the present invention It is a work vehicle. Effect of the Invention

[0014] According to the present invention, it is possible to improve the ease of use. The first invention related to the present invention This makes it possible to improve usability.

[0015] The second invention related to the present invention is the first invention related to the present invention. In addition to the above effects, it is possible to further improve usability.

[0016] The third invention related to the present invention and the second invention related to the present invention In addition to the above effects, it is possible to improve convenience.

[0017] The fourth invention related to the present invention and the third invention related to the present invention In addition to the above effects, it is possible to further improve convenience.

[0018] The fifth invention related to the present invention and the fourth invention related to the present invention In addition to the above effect, the configuration can be simplified.

[0019] The sixth invention related to the present invention and the fifth invention related to the present invention In addition to the above effect, the configuration can be further simplified.

[0020] The seventh invention related to the present invention and the sixth invention related to the present invention In addition to the above effects, the burden on the operator can be reduced. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a left side view of a rice transplanter according to an embodiment of the present invention. [Diagram 2] FIG. 1A is an explanatory diagram (part 1) of the configuration of an electric fertilizer applicator for a rice transplanter according to an embodiment of the present invention; FIG. 1B is an explanatory diagram (part 2) of the configuration of an electric fertilizer applicator for a rice transplanter according to an embodiment of the present invention; [Diagram 3] (a) An explanatory diagram (part 3) of the configuration of an electric fertilizer applicator for a rice transplanter according to an embodiment of the present invention, (b) An explanatory diagram (part 4) of the configuration of an electric fertilizer applicator for a rice transplanter according to an embodiment of the present invention [Figure 4] FIG. 5 is an explanatory diagram of the configuration of an electric fertilizer applicator for a rice transplanter according to an embodiment of the present invention. [Diagram 5] FIG. 1 is an explanatory diagram of the configuration of an electric planting unit of a rice transplanter and a battery unit of a rice transplanter with a paste fertilizer applicator according to an embodiment of the present invention. [Figure 6] FIG. 1 is an explanatory diagram of a configuration of a spacing correction mechanism of a rice transplanter according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference to the drawings, an embodiment of the present invention will be described in detail.

[0023] The same applies below, but some components may not be shown in the drawings, or may be shown in a perspective or simplified manner.

[0024] (1) First, mainly with reference to FIG. 1, the configuration and operation of the rice transplanter according to the embodiment of the present invention will be specifically described.

[0025] FIG. 1 is a left side view of a rice transplanter according to an embodiment of the present invention.

[0026] While explaining the operation of the rice transplanter of this embodiment, a work vehicle operation control method of an invention related to the present invention, which is realized by the controller 300 and the like, will also be explained.

[0027] The rice transplanter of this embodiment is a rice transplanter for traveling the vehicle body 100 on a traveling device 220 having a pair of left and right front wheels 221 and rear wheels 222 in accordance with the control of a controller 300 based on manual steering operation or automatic steering operation of a steering device 230, leveling the field with a ground leveling device 260 having a rotor 261 and a float 262, planting seedlings in the field with a seedling planting device 240 having a seedling planting tool 241, and applying fertilizer to the field with a fertilizer application device 250.

[0028] The traveling device 220, the seedling planting device 240, the fertilizer application device 250 and the soil leveling device 260 are driven by power from the engine 210 transmitted via a speed change mechanism having a main speed change device and an auxiliary speed change device that utilize an HST.

[0029] The fertilizer application device 250 is a device that performs fertilization in which the amount of fertilizer application is adjusted by driving a fertilizer application drive unit 600 using a motor 500. The motor 500 transmits power to the fertilizer application drive unit 600 via a gear mechanism 700.

[0030] The rice transplanter of the present embodiment is a specific example of a work vehicle in the present invention.

[0031] (2) Next, the configuration and operation of the rice transplanter according to the embodiment of the present invention will be described in more detail.

[0032] (2a) First, the configuration of the electric fertilizer applicator will be specifically described with reference primarily to Figures 2(a) and 2(b), 3(a) and 3(b), and 4.

[0033] Here, Figures 2(a) and 2(b), 3(a) and 3(b), and 4 are explanatory diagrams (parts 1 to 5) of the configuration of an electric fertilizer applicator for a rice transplanter according to an embodiment of the present invention.

[0034] The gear mechanism 700 has a motor drive shaft gear 710 attached to the motor drive shaft 510 of the motor 500, and a fertilizer drive unit gear 720 attached to the fertilizer drive unit 600. A state in which the fertilizer drive unit gear 720 meshes with the motor drive shaft gear 710 and a state in which the fertilizer drive unit gear 720 does not mesh with the motor drive shaft gear 710 can be switched.

[0035] Regarding the fertilizer application device 250, a configuration is conceivable in which a gear mechanism 700 using a fertilizer drive gear 720 as a counter gear attached to the so-called fertilizer roll drive shaft of the fertilizer drive unit 600 is provided between the motor 500 and the fertilizer drive unit 600. For example, by changing the gear ratio of the gear mechanism 700 to be larger, a motor 500 with a smaller output can be used.

[0036] By pulling out pin 721, which is inserted as a hairpin that can be easily inserted and removed from the pin hole, the fertilization roll drive shaft slides smoothly, and the fertilization drive unit gear 720 can be removed from the motor drive shaft gear 710, which is attached to the motor drive shaft 510 as a so-called motor gear. Since the drive connection between the motor drive shaft gear 710 and the fertilization drive unit gear 720 that accompanies the insertion of the pin hole is released, the driving force from the motor 500 is turned off, and the fertilization roll drive shaft can be easily rotated manually using the fertilization handle 722, also called the fertilizer delivery handle.

[0037] A configuration can be considered in which a slide mechanism that can turn on and off the driving force transmission of the motor 500 is adopted for the fertilizer drive gear 720. When the motor 500 does not drive due to the application of an unexpected load to the fertilizer roll drive shaft caused by fertilizer clogging or the like, the fertilizer handle 722 can be manually rotated to clear the fertilizer clogging in a configuration that uses the driving force from the rear case of the rear wheel 222. However, in a configuration that uses the motor driving force, if the motor driving force transmission is always on, the fertilizer handle 722 may not be able to be rotated. However, since the motor driving force transmission is turned off by sliding the fertilizer drive gear 720, the fertilizer handle 722 can be rotated even in an emergency in which an excessive load is applied to the motor 500.

[0038] The fertilizer application drive unit state sensor 610 is a sensor that detects the state of the fertilizer application drive unit 600. When the controller 300 determines, based on the detection of the fertilizer application drive unit state sensor 610, that the fertilizer application drive unit 600 is not operating even though power is being transmitted from the motor 500, it outputs a warning.

[0039] In the above-mentioned embodiment, a fertilizer drive unit status sensor 610 is provided as a fertilizer roll drive shaft proximity rotation sensor, so that if it is detected that the fertilizer roll is not being driven normally, a warning message is displayed on the monitor. The user can be notified of any trouble occurring in the fertilizer drive operation.

[0040] Instead of displaying the warning message on the monitor, a buzzer may be sounded.

[0041] In the above-described embodiment, when automatic driving is being performed, if the fertilizer roll driving is not performed normally, the vehicle body 100 may be stopped when the fertilizer driving unit status sensor 610 is used to detect this. This can prevent the occurrence of a work section where fertilization is not performed unintentionally.

[0042] The vehicle speed sensor 430 is a sensor that detects the vehicle speed. The controller 300 controls the motor 500 based on the detection of the vehicle speed sensor 430.

[0043] A configuration is conceivable in which the vehicle speed is determined using a vehicle speed sensor 430 such as a rear wheel rotation sensor, and the amount of fertilizer applied is controlled. This can promote the electrification of the fertilizer applicator drive.

[0044] Instead of using the rear wheel rotation sensor, a configuration using a GNSS sensor is also possible.

[0045] When the fertilizer drive unit status sensor 610 detects that the fertilizer roll drive rotation speed is not consistent with the vehicle speed and the amount of fertilizer applied, a warning message may be displayed on the monitor. The user can be notified of the occurrence of a problem with the fertilizer drive operation.

[0046] (2b) Next, mainly with reference to FIG. 5, the configuration of the electric planting unit and the battery unit of the rice transplanter with a so-called paste fertilizer applicator will be specifically described.

[0047] FIG. 5 is an explanatory diagram of the configuration of the electric planting unit of the rice transplanter and the battery unit of the rice transplanter with a paste fertilizer applicator according to the embodiment of the present invention.

[0048] 5, for example, a power transmission system for transmitting power from engine 210 to front wheels 221 and rear wheels 222 via traveling mechanism HST 410 and transmission case 420 is shown by a thick solid line, and an electric power transmission system is shown by a thin solid line. A waterproof configuration using case 840 is shown by a dashed line. A CAN signal path system is shown by a dotted line, and a fertilizer path system having a first fertilizer path 861, a second fertilizer path 862, etc. is shown by a dashed line.

[0049] The motor 500 also transmits power to the seedling planting device 240. A battery 830 that functions as a power source for the motor 500 is stored inside the case 840 together with the motor 500. The fertilizer whose amount is adjusted is paste fertilizer. The fertilizer taken out from the fertilizer application device 250 by the drive of the fertilizer application drive unit 600 is sent via the fertilizer application selector 850 to one of a first fertilizer path 861 that passes through the inside of the case 840 and a second fertilizer path 862 that does not pass through the inside of the case 840.

[0050] In the specifications of the rice transplanter with paste fertilizer applicator, the control drive by the motor output of the motor 500, which is the working machine drive motor, is performed in the planting section of the seedling planting device 240, and the control drive by the output distributed from such motor output is performed in the paste fertilizer applicator unit of the fertilizer applicator 250 by using HST etc. as necessary. The paste fertilizer configuration can be used to cool the electrical system.

[0051] In the above-mentioned embodiment, the motor 500 for driving the planting part of the seedling planting device 240 and the paste fertilizer unit of the fertilizer applicator 250, the motor drive unit 520 also called MDU, the battery 830 for driving the motor, which is a 48V high-voltage battery, the battery management system 832 also called BMS, and the DC-DC converter 831 for battery power supply may be packed in a waterproof case 840. This can realize the overall waterproofing of the electrical system required for driving the planting part.

[0052] In the above-described embodiment, a configuration in which the first temperature sensor 841 for controlling the internal temperature of the case 840 is disposed inside the case 840 is considered.

[0053] In the embodiment described above, motor drive shaft 510, which is the motor output shaft, protrudes to the outside of case 840, and a gap existing at the boundary surface with case 840 is sealed to maintain waterproofing.

[0054] In the above-described embodiment, a configuration is considered in which power is supplied from auxiliary battery 820 outside case 840, which is a 12V low-voltage battery with a different voltage than 48V, to battery 830 inside case 840 via DC-DC converter 831, and auxiliary battery 820 is charged by generator 810 driven by engine 210.

[0055] The first fertilizer path 861 is connected to the second fertilizer path 862 at a fertilizer path connection point 863 downstream outside the case 840. The seedling planting device 240 and the fertilizer applicator 250 are connected to a fertilizer distributor 870 provided downstream of the fertilizer path connection point 863.

[0056] In the above-described embodiment, two fertilizer application hose paths are provided in the paste fertilizer applicator, and one fertilizer application hose path, the second fertilizer path 862, passes outside the case 840, while the other fertilizer application hose path, the first fertilizer path 861, penetrates the inside of the case 840, and the inside of the case 840 is cooled by the paste fertilizer passing inside the fertilizer hose of the first fertilizer path 861.

[0057] In the above-described embodiment, a fertilizer selector 850 is provided between the paste fertilizer applicator of the fertilizer applicator 250 and the case 840, and a configuration is considered in which the paste fertilizer path can be switched between the inside and outside of the case 840 under the control of the controller 300, which functions as a so-called machine controller.

[0058] In the above-described embodiment, a configuration can be considered in which a second temperature sensor 871 is provided downstream of a fertilizer path connection point 863, which is the confluence of a first fertilizer path 861, which is a paste fertilization hose path that passes through the inside of the case 840, and a second fertilizer path 862, which is a paste fertilization hose path that passes through the outside of the case 840.

[0059] In the above-described aspect, a configuration is conceivable in which a fertilizer distributor 870 that sends fertilizer to the planting part of the seedling planting device 240 and the fertilizer tank of the fertilizer application device 250 and can freely change the distribution ratio, for example, under the control of the controller 300, is arranged downstream of the fertilizer path connection point 863.

[0060] The first temperature sensor 841 is a sensor that detects the temperature inside the case 840. The second temperature sensor 871 is a sensor that detects the temperature of the fertilizer entering the fertilizer distributor 870. The controller 300 determines the path selection of the fertilizer selector 850 and the distribution ratio of the fertilizer distributor 870 based on the detections of the first temperature sensor 841 and the second temperature sensor 871.

[0061] In the above-described aspect, a configuration is conceivable in which, according to the detected value of the first temperature sensor 841 inside the case 840 and the detected value of the second temperature sensor 871 outside the case 840, the selection determination of the paste fertilizer application path by the fertilizer selector 850 and the distribution rate of the fertilizer distributor 870 are changed.

[0062] In the above-described aspect, a threshold value T1 [degrees Celsius] and a threshold value T2 [degrees Celsius] for the first temperature sensor 841 are provided such that T1 < T2, a threshold value T3 [degrees Celsius] for the second temperature sensor 871 is provided, and when the detected value of the first temperature sensor 841 is less than T1 and the detected value of the second temperature sensor 871 is less than T3, a configuration is conceivable in which the first fertilizer path 861, which is a paste fertilizer application hose path passing through the inside of the case 840, is selected. The internal temperature of the case 840 and the fertilizer temperature are controlled so as not to exceed a predetermined level.

[0063] In the above-described aspect, when the detected value of the first temperature sensor 841 is less than T1 and the detected value of the second temperature sensor 871 is greater than or equal to T3, a configuration is conceivable in which the second fertilizer path 862, which is a paste fertilizer application hose path passing through the outside of the case 840, is selected.

[0064] In the above-described embodiment, when the detection value of the first temperature sensor 841 is greater than or equal to T1 but less than T2, and the detection value of the second temperature sensor 871 is less than T3, a configuration may be considered in which the first fertilizer path 861, which is a paste fertilization hose path passing through the inside of the case 840, is selected.

[0065] In the above-described embodiment, when the detection value of first temperature sensor 841 is equal to or greater than T1 but less than T2, if the detection value of second temperature sensor 871 is equal to or greater than T3, first fertilizer path 861, which is a paste fertilization hose path passing through the inside of case 840, is selected, and the rotation speed of motor 500 is increased to increase the fertilizer tank return rate of fertilizer distributor 870, thereby increasing the fertilizer flow rate inside case 840, and the rise in the internal temperature of case 840 is notified to the operator.

[0066] In the above-described embodiment, when the detection value of the first temperature sensor 841 is equal to or higher than T2, the planting unit function and the fertilizer applicator function are stopped, and an error caused by a malfunction of the motor 500 due to an increase in the internal temperature of the case 840 is notified to the operator.

[0067] In the above-described embodiment, when planting work is performed, the rotation speed of the motor 500 for driving the working machine is controlled to exceed a predetermined level, and the planting mechanism HST 880, whose motor rotation state is detected by the planting mechanism HST state sensor 881, and the fertilizer distributor 870 are controlled by the controller 300, etc., so that the planting unit rotation speed and the amount of fertilizer application are controlled to match the target values. Since the rotation speed of the motor 500 is always controlled to exceed a predetermined level when planting work is performed, even when the vehicle speed is fluctuating, it is expected that the responsiveness will be improved and the cooling effect will be improved by the circulation of the paste fertilizer.

[0068] (3) Next, the configuration and operation of the rice transplanter according to the embodiment of the present invention will be described in more detail.

[0069] The configuration of the plant spacing correction mechanism will be specifically described with reference mainly to FIG.

[0070] FIG. 6 is an explanatory diagram of the configuration of a spacing correction mechanism of the rice transplanter according to the embodiment of the present invention.

[0071] In FIG. 6, the inputs from engine 210 are indicated by arrows.

[0072] <Configuration of the plant spacing correction mechanism (1)> One possible configuration for the rice transplanter is to employ a spacing correction mechanism by adjusting the rotational speed using a planetary gear mechanism 1005 having an internal gear arranged upstream of a so-called spacing gear, and a spacing motor 1001. A configuration that realizes so-called spacing maintenance by adjusting the planting unit rotational speed using an HST is also possible, but a simple mechanism using the planetary gear mechanism 1005 and the spacing motor 1001 can adjust the planting unit rotational speed without requiring a large space.

[0073] <Configuration of the plant spacing correction mechanism (2)> In the configuration of <Configuration of Inter-plant Correction Mechanism (1)>, the sun gear of the sun gear section 1002 is normally fixed and the internal gear and planetary carrier function as input and output sections, respectively, and such a sun gear can be configured to be rotated by the inter-plant motor 1001 to reduce the output speed.

[0074] <Configuration of the plant spacing correction mechanism (3)> In the configuration of <Configuration (2) of the spacing correction mechanism>, the planetary carrier has a hollow structure, the outside is a gear, and a configuration in which the planetary gear mechanism 1005 meshes with another gear is conceivable.

[0075] <Configuration of the plant spacing correction mechanism (4)> In the configuration of <Configuration of Inter-row Correction Mechanism (2)>, the inter-row motor 1001 of the sun gear section 1002 may be configured so that the rotation speed and motor phase can be controlled.

[0076] <Configuration of the plant spacing correction mechanism (5)> In the configuration of <Configuration (3) of the plant spacing correction mechanism>, a configuration is conceivable in which the output from another gear meshing with the planetary carrier is input to a gear box 1004 including a variable speed gear, and the gear box output is used to drive the planting section.

[0077] <Configuration of the plant spacing correction mechanism (6)> In the configuration of <Configuration of spacing correction mechanism (5)>, a configuration may be considered in which a first proximity sensor 1003a that detects the rotation speed is provided together with a proximity sensor gear at the output part of a gear box 1004 including a variable speed gear.

[0078] <Configuration of the spacing correction mechanism (7)> In the configuration of the <Configuration of the spacing correction mechanism (5)>, a configuration can be considered in which a sensor is mounted to detect the speed change state of the gear box 1004 including the variable speed gear, and the input / output ratio of the gear box 1004 is determined. The same configuration as the general-purpose spacing change lever portion can be used.

[0079] <Configuration of the spacing correction mechanism (8)> In the configurations of <Configuration (6) of the spacing correction mechanism> and <Configuration (7) of the spacing correction mechanism>, a configuration can be considered in which the target rotational speed of the gearbox output shaft of the gearbox 1004 is calculated from the input / output ratio of the gearbox 1004, the output rotational speed of the gearbox 1004, and the rotational speed of the rear wheels.

[0080] <Configuration of the spacing correction mechanism (9)> In the configuration of <Configuration (8) of the inter-section correction mechanism>, when the slip ratio of the vehicle body 100 is detected using a sensor such as a GNSS antenna, a configuration can be considered in which a value obtained by adding a correction for the slip ratio to the target rotation speed is adopted as the current rotation speed of the gearbox output shaft.

[0081] <Configuration of the spacing correction mechanism (10)> In the configuration of <Configuration of the spacing correction mechanism (9)>, a configuration is considered in which the rotational speed of the spacing motor 1001 of the sun gear section 1002 is adjusted so that the current rotational speed of the gearbox output shaft matches the target rotational speed, thereby performing spacing correction due to slip.

[0082] <Configuration of the plant spacing correction mechanism (11)> In the configuration of the <Configuration of the spacing correction mechanism (10)>, the second proximity sensor 1003b may be arranged together with a so-called one-tooth gear attached to the output shaft of the gear box, and when planting is stopped, the spacing motor 1001 may be rotated until the output shaft of the gear box coincides with the target phase. This allows the phase alignment of the planting rod to be realized.

[0083] In addition, the program of the invention related to the present invention is a program for causing a computer to execute all or part of the steps (or processes, operations and actions, etc.) of the work vehicle operation control method of the invention related to the present invention described above, and is a program that operates in cooperation with a computer.

[0084] In addition, the recording medium of the invention related to the present invention is a recording medium having recorded thereon a program for causing a computer to execute all or part of the operations of all or part of the steps (or processes, operations and actions, etc.) of the work vehicle operation control method of the invention related to the present invention described above, and is a computer-readable recording medium in which the read program is used in cooperation with a computer.

[0085] In addition, the above-mentioned "some steps (or processes, operations, actions, etc.)" means one or some steps among the multiple steps.

[0086] In addition, the above-mentioned "operation of a step (or process, operation, action, etc.)" means the operation of all or a part of the above-mentioned steps.

[0087] Furthermore, one mode of use of the inventive program related to the present invention may be in the form of being transmitted through a transmission medium such as the Internet, light, radio waves, or sound waves, being read by a computer, and operating in cooperation with the computer.

[0088] Furthermore, the recording medium includes a ROM (Read Only Memory) and the like.

[0089] Furthermore, a computer is not limited to pure hardware such as a CPU (Central Processing Unit), and may also include firmware, an OS (Operating System), and even peripheral devices.

[0090] As described above, the configuration of the present invention may be realized in software or in hardware. [Industrial Applicability]

[0091] The work vehicle of the present invention can improve usability and is useful for use as a work vehicle such as a rice transplanter. [Explanation of symbols]

[0092] 100 Body 210 Engine 220 Running gear 221 Front wheel 222 Rear wheel 230 Steering Gear 240 Seedling planting device 241 Seedling planting tool 250 Fertilizer equipment 260 Ground leveling equipment 261 Rotor 262 Float 300 Controller 410 Travel mechanism HST 420 Transmission Case 430 Vehicle speed sensor 500 Motor 510 Motor drive shaft 520 Motor Drive Unit 600 Fertilizer drive unit 610 Fertilizer drive unit status sensor 700 Gear mechanism 710 Motor drive shaft gear 720 Fertilizer drive gear 721 Pins 722 Fertilizer handle 810 Generator 820 Auxiliary Battery 830 Battery 831 DC-DC Converter 832 Battery Management System 840 cases 841 First Temperature Sensor 850 Fertilizer Selector 861 First Fertilizer Route 862 Second Fertilizer Route 863 Fertilizer Route Connection Point 870 Fertilizer distributor 871 Second Temperature Sensor 880 Planting mechanism HST 881 Planting mechanism HST status sensor 1001 Interplant motor 1002 Solar Gear Section 1003a First Proximity Sensor 1003b Secondary Proximity Sensor 1004 Gearbox 1005 Planetary gear mechanism

Claims

1. The present invention includes a fertilizer application device (250) that performs fertilization by adjusting the amount of fertilizer application by driving a fertilizer application drive unit (600) using a motor (500), The motor (500) transmits power to the fertilizer driving unit (600) via a gear mechanism (700), The gear mechanism (700) has a motor drive shaft gear (710) attached to a motor drive shaft (510) rotated by the motor (500), and a fertilizer drive gear (720) attached to the fertilizer drive unit (600), A state in which the fertilizer drive gear (720) meshes with the motor drive shaft gear (710) and a state in which the fertilizer drive gear (720) does not mesh with the motor drive shaft gear (710) are switchable; A controller (300); A fertilizer drive unit status sensor (610) for detecting the status of the fertilizer drive unit (600); It is equipped with The work vehicle is characterized in that the controller (300) outputs a warning when it determines, based on detection by the fertilizer drive unit status sensor (610), that the fertilizer drive unit (600) is not driving even though the power is being transmitted from the motor (500).

2. A vehicle speed sensor (430) is provided for detecting the vehicle speed.

2. The work vehicle according to claim 1, wherein the controller (300) controls the motor (500) based on detection by the vehicle speed sensor (430).

3. The motor (500) also transmits the power to the seedling planting device (240); A battery (830) that functions as a power source for the motor (500) is stored inside the case (840) together with the motor (500); The fertilizer whose amount is adjusted is a paste fertilizer, The work vehicle described in claim 2, characterized in that the fertilizer taken out of the fertilizer device (250) by driving the fertilizer drive unit (600) is sent via a fertilizer selector (850) to one of a first fertilizer path (861) that passes through the interior of the case (840) and a second fertilizer path (862) that does not pass through the interior of the case (840).

4. The first fertilizer path (861) is connected to the second fertilizer path (862) at a downstream fertilizer path connection point (863) outside the case (840); The work vehicle according to claim 3, characterized in that the seedling planting device (240) and the fertilizer application device (250) are connected to a fertilizer distributor (870) provided downstream of the fertilizer path connection point (863).

5. A first temperature sensor (841) for detecting the temperature inside the case (840); A second temperature sensor (871) for detecting the temperature of the fertilizer entering the fertilizer dispenser (870); It is equipped with The work vehicle according to claim 4, characterized in that the controller (300) determines the route selection of the fertilizer selector (850) and the distribution ratio of the fertilizer distributor (870) based on the detection of the first temperature sensor (841) and the second temperature sensor (871).

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