Work vehicles

Abstract

The inventors realized that conventional work vehicles, such as rice transplanters, are not always easy to use when utilizing their convenient functions. [Solution] The vehicle is equipped with an engine (210) located on the front side of the vehicle body (100), an engine hood covering the engine (210), a plurality of antenna stay members (800) erected on the vehicle body (100), a receiving device that acquires position information by a satellite positioning system, an inertial measuring device, and a control unit that controls the steering unit based on information from the receiving device and information from the inertial measuring device. The engine hood is openable and closable by utilizing a rotating structure, and the receiving device and the inertial measuring device are supported at the same location on the plurality of antenna stay members (800) extending above the engine hood.

Description

Technical Field

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

Background Art

[0002] A work vehicle such as a rice transplanter is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, the inventor of the present invention considers various needs of work vehicle users and believes that the trend of successively implementing convenient functions in work vehicles such as this is accelerating more and more.

[0005] However, the inventor has noticed that the usability when using convenient functions is not always good for the conventional work vehicle such as a rice transplanter described above.

[0006] An object of the present invention is to provide a work vehicle that can improve usability in consideration of the above-described conventional problems.

Means for Solving the Problems

[0007] A first aspect of the present invention includes an engine (210) provided at a front side portion of a vehicle body (100), an engine hood that covers the engine (210), a plurality of antenna stay members (800) erected on the vehicle body (100), The system includes a receiving device that acquires position information by a satellite positioning system, an inertial measuring device, and a control unit that controls the steering unit based on the information from the receiving device and the information from the inertial measuring device. The aforementioned engine hood can be opened and closed by utilizing a rotating mechanism. The work vehicle is characterized in that the receiving device and the inertial measuring device are supported at the same location on the plurality of antenna stay members (800) that extend above the engine hood.

[0008] The second aspect of the present invention is that the engine hood has an upper hood portion (310), a front hood portion (320), a left hood portion (330), and a right hood portion (340), The upper hood portion (310) has an upper hood portion front portion (311) and an upper hood portion rear portion (312), The front part (311) of the upper hood can be opened and closed relative to the rear part (312) of the upper hood by utilizing a rotating structure. The pivot structure of the front part (311) of the upper hood is a front-opening pivot structure. The work vehicle according to claim 1 is characterized in that the front part (311) of the upper hood can be opened upward relative to the rear part (312) of the upper hood by utilizing the front-opening rotating structure.

[0009] The third aspect of the present invention comprises an air cleaner device (600) covered by the engine hood, having an air cleaner intake hose (610), A heat shield (910) is provided between the engine (210) and the operating control panel (920). The work vehicle according to claim 2 is characterized in that the air cleaner intake port of the air cleaner intake hose (610) is located near the main gear lever guide groove (921) provided on the operating control panel (920).

[0010] The fourth aspect of the present invention is a radiator device (500) erected on the left or right side of the engine (210), having a radiator body (510), a radiator fan (520), and a radiator fan shroud (530). The front and upper ends of the radiator fan (520) protrude so as not to overlap with the radiator body (510) when viewed from the side of the vehicle. The work vehicle according to claim 3 is characterized in that the wall portion of the radiator fan shroud (530) is configured so as not to overlap with the front end and upper end of the radiator fan (520) in a side view of the vehicle body. [Effects of the Invention]

[0011] The first aspect of the present invention makes it possible to control the steering of the steering unit using high-precision positional information and inertial information, enabling accurate automatic steering control of the traveling machine so that the traveling machine and work device travel along a target line.

[0012] The second aspect of the present invention makes it possible to further improve usability in addition to the effects of the first aspect of the present invention.

[0013] The third aspect of the present invention makes it possible to improve convenience in addition to the effects of the second aspect of the present invention.

[0014] The fourth aspect of the present invention makes it possible to simplify the configuration in addition to the effects of the third aspect of the present invention. [Brief explanation of the drawing]

[0015] [Figure 1] Left side view of a rice transplanter according to an embodiment of the present invention. [Figure 2] (a) Explanatory diagram of the opening and closing configuration of the front engine bonnet of a rice transplanter according to an embodiment of the present invention (Part 1), (b) Explanatory diagram of the opening and closing configuration of the front engine bonnet of a rice transplanter according to an embodiment of the present invention (Part 2) [Figure 3](a) Explanatory drawing (Part 1) of the attachment structure of the left and right parts of the front engine hood of the rice transplanter in the embodiment of the present invention, (b) Explanatory drawing (Part 2) of the attachment structure of the left and right parts of the front engine hood of the rice transplanter in the embodiment of the present invention, (c) Explanatory drawing (Part 3) of the attachment structure of the left and right parts of the front engine hood of the rice transplanter in the embodiment of the present invention [Figure 4] Explanatory drawing (Part 1) of the radiator cooling shroud structure of the rice transplanter in the embodiment of the present invention [Figure 5] (a) Explanatory drawing (Part 2) of the radiator cooling shroud structure of the rice transplanter in the embodiment of the present invention, (b) Explanatory drawing (Part 3) of the radiator cooling shroud structure of the rice transplanter in the embodiment of the present invention, (c) Explanatory drawing (Part 4) of the radiator cooling shroud structure of the rice transplanter in the embodiment of the present invention [Figure 6] (a) Explanatory drawing (Part 5) of the radiator cooling shroud structure of the rice transplanter in the embodiment of the present invention, (b) Explanatory drawing (Part 6) of the radiator cooling shroud structure of the rice transplanter in the embodiment of the present invention, (c) Explanatory drawing (Part 7) of the radiator cooling shroud structure of the rice transplanter in the embodiment of the present invention [Figure 7] Explanatory drawing of the air cleaner intake structure of the rice transplanter in the embodiment of the present invention [Figure 8] (a) Explanatory drawing (Part 1) of the hood opening side stopper by the straight - ahead antenna stay of the rice transplanter in the embodiment of the present invention, (b) Explanatory drawing (Part 2) of the hood opening side stopper by the straight - ahead antenna stay of the rice transplanter in the embodiment of the present invention [Figure 9] (a) Explanatory drawing (Part 1) of the alignment of the hood opening and closing part of the rice transplanter in the embodiment of the present invention, (b) Explanatory drawing (Part 2) of the alignment of the hood opening and closing part of the rice transplanter in the embodiment of the present invention, (c) Explanatory drawing (Part 3) of the alignment of the hood opening and closing part of the rice transplanter in the embodiment of the present invention [Figure 10](a) Explanatory drawing (Part 1) of wind dispersion by the diagonally arranged air cleaner of the rice transplanter in the embodiment of the present invention, (b) Explanatory drawing (Part 2) of wind dispersion by the diagonally arranged air cleaner of the rice transplanter in the embodiment of the present invention [Figure 11] (a) Explanatory drawing (Part 1) of the arrangement of the reserve tank that does not obstruct the wind of the rice transplanter in the embodiment of the present invention, (b) Explanatory drawing (Part 2) of the arrangement of the reserve tank that does not obstruct the wind of the rice transplanter in the embodiment of the present invention [Figure 12] (a) Explanatory drawing (Part 1) of the first air cleaner configuration of the front engine regarding reduction of the intake air temperature of the air cleaner of the rice transplanter in the embodiment of the present invention, (b) Explanatory drawing (Part 2) of the first air cleaner configuration of the front engine regarding reduction of the intake air temperature of the air cleaner of the rice transplanter in the embodiment of the present invention, (c) Explanatory drawing (Part 3) of the first air cleaner configuration of the front engine regarding reduction of the intake air temperature of the air cleaner of the rice transplanter in the embodiment of the present invention [Figure 13] (a) Explanatory drawing (Part 4) of the first air cleaner configuration of the front engine regarding reduction of the intake air temperature of the air cleaner of the rice transplanter in the embodiment of the present invention, (b) Explanatory drawing (Part 5) of the first air cleaner configuration of the front engine regarding reduction of the intake air temperature of the air cleaner of the rice transplanter in the embodiment of the present invention, (c) Explanatory drawing (Part 6) of the first air cleaner configuration of the front engine regarding reduction of the intake air temperature of the air cleaner of the rice transplanter in the embodiment of the present invention [Figure 14] (a) Explanatory drawing (Part 1) of the second air cleaner configuration of the front engine regarding reduction of the intake air temperature of the air cleaner of the rice transplanter in the embodiment of the present invention, (b) Explanatory drawing (Part 2) of the second air cleaner configuration of the front engine regarding reduction of the intake air temperature of the air cleaner of the rice transplanter in the embodiment of the present invention [Figure 15] Explanatory drawing (Part 1) of the mounting configuration of the oil pan guard and the additional effect of the cover of the rice transplanter in the embodiment of the present invention [Figure 16](a) Explanatory diagram of the oil pan guard mounting configuration and cover addition effect of the rice transplanter according to the embodiment of the present invention (Part 2), (b) Explanatory diagram of the oil pan guard mounting configuration and cover addition effect of the rice transplanter according to the embodiment of the present invention (Part 3), (c) Explanatory diagram of the oil pan guard mounting configuration and cover addition effect of the rice transplanter according to the embodiment of the present invention (Part 4) [Figure 17] (a) Explanatory diagram of the transmission configuration of the front engine of the robotic rice transplanter according to the embodiment of the present invention (Part 1), (b) Explanatory diagram of the transmission configuration of the front engine of the robotic rice transplanter according to the embodiment of the present invention (Part 2) [Figure 18] (a) Explanatory diagram (1) of the utilization of waste heat from the front engine of the robotic rice transplanter according to the embodiment of the present invention, (b) Explanatory diagram (2) of the utilization of waste heat from the front engine of the robotic rice transplanter according to the embodiment of the present invention [Figure 19] Diagram illustrating the folding joint configuration of the 10-row rotor of a rice transplanter according to an embodiment of the present invention (Part 1) [Figure 20] Diagram illustrating the folding joint configuration of the 10-row rotor of the rice transplanter according to an embodiment of the present invention (Part Two) [Figure 21] Diagram illustrating the arrangement of the folding safety device switch for the 10-row planting frame of the rice transplanter according to an embodiment of the present invention. [Figure 22] (a) Explanatory diagram of the arrangement of the fertilizer duct suction hose of the rice transplanter according to an embodiment of the present invention (Part 1), (b) Explanatory diagram of the arrangement of the fertilizer duct suction hose of the rice transplanter according to an embodiment of the present invention (Part 2), (c) Explanatory diagram of the arrangement of the fertilizer duct suction hose of the rice transplanter according to an embodiment of the present invention (Part 3) [Modes for carrying out the invention]

[0016] Embodiments of the present invention will be described in detail with reference to the drawings.

[0017] The same applies below, however, some components may not be shown in the drawings, or they may be shown in perspective or in an abbreviated form.

[0018] (1) First, the configuration and operation of the rice transplanter according to the embodiment of the present invention will be described in detail, mainly with reference to Figure 1.

[0019] Here, Figure 1 is a left side view of a rice transplanter according to an embodiment of the present invention.

[0020] While describing the operation of the rice transplanter in this embodiment, we will also explain a method for controlling the operation of a work vehicle related to the present invention, which is realized by a controller or the like.

[0021] The rice transplanter of this embodiment is a rice transplanter that, in response to the control of a controller based on manual or automatic steering operation in the steering device 230, moves the vehicle body 100 on a traveling device 220 having a pair of left and right front wheels 221 and rear wheels 222, levels the field with a land leveling device 260 having a rotor 261 and floats 262, plants seedlings in the field with a seedling planting device 240 having a seedling planting tool 241, and applies fertilizer to the field with a fertilizing device 250.

[0022] The traveling device 220, as well as the seedling planting device 240, the fertilizer application device 250, and the land leveling device 260, are driven by power from the engine 210 transmitted via a transmission mechanism having a main transmission and a sub-transmission that utilize an HST.

[0023] The rice transplanter in this embodiment is a specific example of a work vehicle in the present invention.

[0024] (2) Next, the configuration and operation of the rice transplanter according to the embodiment of the present invention will be described in more detail.

[0025] As shown in Figures 2(a) and 2(b), which are explanatory diagrams (parts 1 and 2) of the front engine bonnet opening and closing configuration of a rice transplanter according to an embodiment of the present invention, a radiator device 500 with a cap, an air cleaner device 600, a fuse box 1001, an engine coolant reserve tank 540 with a cap, an engine oil tank 1002, and an oil level gauge 1003 that is operated by inserting a hand from above are arranged.

[0026] The engine hood 300, which covers the engine 210 located at the front of the vehicle body 100, has an upper hood section 310, a front hood section 320, a left hood section 330, and a right hood section 340. The upper hood section 310 has an upper hood section front part 311 and an upper hood section rear part 312. The upper hood section front part 311 can be opened and closed relative to the upper hood section rear part 312 by utilizing a rotating structure.

[0027] The pivot structure of the front part 311 of the upper hood is a front-opening pivot structure. By utilizing the front-opening pivot structure, the front part 311 of the upper hood can be opened upward relative to the rear part 312 of the upper hood.

[0028] In the engine hood 300, which is a front-engine bonnet, only the front half of the upper surface is configured to rotate and open approximately 45 degrees, pivoting near the rear end of that section. When this section is opened, the engine-related components, such as the air cleaner unit 600, fuse box 1001, radiator unit 500 cap, engine coolant reserve tank 540 cap, engine oil tank 1002, and oil level gauge 1003, are positioned to be visible. By simply opening this section, all daily engine-related inspections can be performed, and the configuration allows for easy, tool-free work. Even if the antenna stay member 800, which is a straight antenna stay, is located within the bonnet area, the configuration can be done in the narrow space between them.

[0029] Thus, by utilizing the engine 210 located on the front side of the vehicle body 100 and the engine hood 300 covering the engine 210, a configuration is conceivable in which the upper hood section 310, the front hood section 320, the left hood section 330, and a portion of the right hood section 340 are removable from the vehicle body 100, and a portion of the upper surface in front of the upper hood section 310 is openable and closable. By simply opening this section, all daily engine-related inspections can be performed, resulting in a configuration that allows for easy, tool-less work. Even if the antenna stay member 800, which is a straight antenna stay, is positioned within the range of the engine hood 300, also called the bonnet, a configuration is possible in the narrow area between them.

[0030] As shown in Figures 3(a) to 3(c), which are explanatory diagrams (parts 1 to 3) of the mounting configuration of the left and right front engine hoods of a rice transplanter according to an embodiment of the present invention, the hoods are fixed in one place by a knob bolt 1004, and the left hood portion 330 and the right hood portion 340 are fixed by hooking them onto a part of the column 1005. Two lower protrusions, front step protrusions 1006, are arranged so that the left hood portion 330 and the right hood portion 340 can be slid forward and removed. By sandwiching the front step protrusions 1006 between corresponding protrusions on the front step side, the hoods are held in place to suppress undesirable outward spreading of the hood portion.

[0031] More specifically, the left and right hood sections, the left hood section 330 and the right hood section 340, which are the left and right parts of the engine hood, are fixed to the machine as follows. That is, the elongated grooves provided on the rear upper part of the left hood section 330 and the right hood section 340 are inserted into the column 1005 from the front and hooked into place. The front upper part of the left hood section 330 and the right hood section 340 is fixed from the inside of the hood with knob bolts 1004. The lower front and rear of the left hood section 330 and the right hood section 340 are provided with convex shapes to prevent them from spreading outwards due to the convex parts provided on the front step. After opening the front part 311 of the upper hood section on the front of the top surface of the hood, the front hood section 320 on the front of the hood, which is fixed with hooks, is removed, and then the left hood section 330 and the right hood section 340 are removed by sliding them forward by removing only one knob bolt 1004 from the inside. This allows the left hood section 330 and the right hood section 340 of the engine hood to be easily removed without tools. As a result, on the left side of the vehicle, mud stains caused by flywheel swirl can be easily removed, and on the right side of the vehicle, the radiator fins can be easily cleaned during actual work. Furthermore, even if the mounting positions of the left and right hood sections on the machine side vary, the positioning point is only one knob bolt section by the knob bolt 1004, making it possible to easily align and assemble the components.

[0032] Thus, at a pivot point near the rear end of the engine hood 300, the front part 311 of the upper hood portion opens and closes relative to the rear part 312 of the upper hood portion, and the left hood portion 330 and the right hood portion 340, which are at least left and right hood portions that are removable from the vehicle body 100, are equipped with fixing parts that can be fixed to the steering column side such as the column 1005, and can be removed by sliding them forward.

[0033] As shown in Figure 4, which is an explanatory diagram (part 1) of the radiator cooling shroud configuration of a rice transplanter according to an embodiment of the present invention, the relevant section relating to the following explanation is enclosed by a dotted ellipse.

[0034] The radiator device 500 is a device erected on the left or right side of the engine 210, comprising a radiator body 510, a radiator fan 520, and a radiator fan shroud 530. The front and upper ends of the radiator fan 520 protrude so as not to overlap with the radiator body 510 in a side view of the vehicle. The walls of the radiator fan shroud 530 are configured so as not to overlap with the front and upper ends of the radiator fan 520 in a side view of the vehicle.

[0035] In relation to the arrangement of the radiator device 500, the radiator fan 520, which is a cooling fan, is positioned to protrude in front of and above the radiator body 510, and the shroud portion of the radiator fan shroud 530 into which the radiator fan 520 protrudes is left without a wall, so that air can be drawn in from there as well. There is a gap between the radiator fan shroud 530 and the exterior in front of and above the radiator body 510. If there is a gap between the radiator fan shroud 530 and the exterior, without any measures taken, there is a concern that hot air from the engine side will circulate through this gap to the intake side of the radiator device 500. However, by offsetting the radiator fan 520 and creating an airflow from the outside air to the engine 210 on the outside of the radiator device 500, this hot air that tries to circulate can be returned to the engine side by this airflow, and even if there is a gap around it, it is possible to configure it so that hot air does not circulate to the intake side of the radiator device 500. This design eliminates the need for an expensive and complex configuration to fill the gap between the radiator fan shroud 530 and the exterior, resulting in an efficient cooling configuration that is inexpensive and easy to implement.

[0036] As shown in Figures 5(a) to 5(c), which are explanatory diagrams (parts two to four) of the radiator cooling shroud configuration of an embodiment of the present invention, there is a flow of air W1 which is the hot air from the engine side that passes through the gap between the radiator fan shroud 530 and the exterior and circulates to the radiator intake side, is drawn into the airflow passing through the upper opening of the shroud, and returns to the engine side again; a flow of air W2 which is the outside air that passes through the upper opening of the shroud without passing through the radiator fins of the radiator device 500 and flows upwards towards the engine; and a flow of air W3 which is the outside air that passes through the radiator fins, hits the engine 210, and flows up and down in front of and behind the engine. In an efficient engine cooling configuration that does not separate the compartments, the radiator fan 520 is positioned so as to extend forward and upward relative to the radiator. Furthermore, the shroud portion of the radiator fan shroud 530 that extends beyond the radiator fan 520 is left without a wall to allow air to be drawn in from there. There is no need to fill the gap between the radiator fan shroud 530 and the exterior. At the rear of the radiator, the shroud portion of the radiator fan shroud 530 is left without a wall to allow air to be drawn in from there. A wall is provided that connects to the radiator fan shroud 530. In tractors and rice transplanters, the gap between the radiator fan shroud 530 and the exterior is often sealed to separate the engine side from the radiator intake side and prevent hot air from the engine side from circulating to the radiator intake side, but this gap is not sealed.

[0037] A gap is provided between the shroud flat portion 530f of the radiator fan shroud 530 and the outer wall of the radiator housing 500, and it is desirable that the two are not in close contact. In other words, there is an airflow that passes through this gap and is drawn in in the direction indicated by the white arrow, and heat dissipation at the corner portion of the radiator body 510, which is covered by the radiator fan shroud 530 without protruding, is promoted without any problems.

[0038] As shown in Figures 6(a) to 6(c), which are explanatory diagrams (five to seven) of the radiator cooling shroud configuration of the rice transplanter according to the embodiment of the present invention, the radiator fan shroud 530 is a unit with a configuration similar to that of a general-purpose configuration, but is provided to cover the radiator fins. A configuration without the radiator fan shroud 530 is also conceivable, but the effects described above can be expected by covering the rear and lower parts of the radiator body 510.

[0039] Thus, in relation to the radiator arrangement of the radiator device 500, the radiator fan 520, which is a cooling fan, is positioned so as to protrude in front of and above the radiator body 510. The shroud portion of the radiator fan shroud 530, over which the radiator fan 520 protrudes, is not provided with walls to allow air to be drawn in, and a gap is made between the radiator fan shroud 530 and the exterior in front of and above the radiator body 510.

[0040] As shown in Figure 7, an explanatory diagram of the air cleaner intake configuration of a rice transplanter according to an embodiment of the present invention, the intake port of the air cleaner intake hose 610, the main shift lever guide groove 921 (also called the main shift lever guide hole), and the heat shield plate 910 are arranged.

[0041] The air cleaner device 600 is a device covered by the engine hood 300 and has an air cleaner intake hose 610. A heat shield 910 is provided between the engine 210 and the driver's control panel 920. The air cleaner intake port of the air cleaner intake hose 610 is located near the main shift lever guide groove 921 provided on the driver's control panel 920.

[0042] An air cleaner intake hose 610, extending from the air cleaner of the air cleaner device 600 located on top of the engine 210, is routed across a heat shield 910 located on the rear side of the engine, and the intake port at the end of the air cleaner intake hose 610, located below the driver's control panel 920, is positioned near the main shift lever guide groove 921 of the driver's control panel 920. By positioning the end of the air cleaner intake hose 610 behind the heat shield 910, air can be drawn in from the side of the column 1005, which is slightly cooler, rather than from the engine side, which is hotter inside the bonnet, thereby lowering the intake air temperature, which affects engine performance. Furthermore, by positioning the intake port of the air cleaner intake hose 610 near the main shift lever guide groove 921, which is the opening of the driver's control panel 920, outside air can be easily drawn in from there, further lowering the intake air temperature. By positioning the intake port of the air cleaner intake hose 610 near the main shift lever guide groove 921, an airflow from the outside to the inside can be created in the groove of the main shift lever guide groove 921. This prevents hot air from escaping to the area around the operator's hands gripping the main shift lever, thus preventing discomfort caused by heat during operation.

[0043] Thus, one possible configuration is to route the air cleaner intake hose 610, which extends from the air cleaner of the air cleaner device 600 located on top of the engine 210, across the heat shield 910 provided on the rear side of the engine, and position the intake port at the end of the air cleaner intake hose 610, which is located below the driver's control panel 920, near the main shift lever guide groove 921 of the driver's control panel 920.

[0044] As shown in Figures 8(a) and 8(b), which are explanatory diagrams (parts 1 and 2) of the hood opening side stopper by the straight antenna stay of a rice transplanter according to an embodiment of the present invention, a groove is provided in the front part 311 of the upper hood that rotates open and closes, and an antenna stay member 800, which is a straight antenna stay configured in a V-shape, is provided.

[0045] The two antenna stay members 800 are erected on the vehicle body 100 in a V-shape when viewed from the front of the vehicle body. The front part 311 of the upper hood is positioned between the two antenna stay members 800 when viewed from the front of the vehicle body, and when opened upward relative to the rear part 312 of the upper hood, it comes into contact with the two antenna stay members 800 and stops.

[0046] In a configuration where the front upper hood section 311, which is the front part of the upper surface of the hood located above the engine 210 (a front engine), rotates to open and close, the front upper hood section 311 moves between two upward-extending antenna stay members 800. The two antenna stay members 800 are configured in a V-shape, with the distance between them narrowing as they go higher, and the rotating front upper hood section 311 is provided with a groove to avoid straight antenna stay members such as the antenna stay members 800. When the front upper hood section 311 is opened, at a certain angle, the inner side of the groove initially provided to avoid the front upper hood section 311 is caught between the V-shaped antenna stay members 800, stopping it from opening any further. By using the V-shaped antenna stay members 800 as a stopper that limits the hood opening, damage to other parts caused by over-opening the hood is prevented. Furthermore, if a thick, soft rubber or sponge is provided on the inner side of the hood, that part will be compressed when the front part 311 of the upper hood opens and gets caught. This frictional and repulsive force can be used to hold and fix the front part 311 of the upper hood in the open position.

[0047] Thus, in a configuration in which the front upper hood portion 311, which is the front part of the upper surface of the hood located on top of the engine 210, which is the front engine, rotates to open and close, the front upper hood portion 311 moves between two upward-extending antenna stay members 800, and the two antenna stay members 800 are configured in a V-shape so that the distance between them narrows as they go upwards. A groove is provided in the rotating front upper hood portion 311 to avoid straight antenna stay portions such as the antenna stay members 800. This configuration allows the front upper hood portion 311 to open so that when it is opened, the inner side of the groove initially provided to avoid interference with the straight antenna stays of the front upper hood portion 311 becomes trapped between the V-shaped antenna stay members 800 at a certain angle, stopping it from opening any further.

[0048] As shown in Figures 9(a) to 9(c), which are explanatory diagrams (parts 1 to 3) of the alignment of the hood opening and closing parts of the rice transplanter according to the embodiment of the present invention, when the front part 311 of the upper hood section, which functions as an upper front hood, is aligned with the front hood section 320, which is a lower hood, it is prone to misalignment in the front-to-back direction, and when the front part 311 of the upper hood section is aligned with the left hood section 330 and the right hood section 340, which are the left-hand and right-hand hoods, it is prone to misalignment in the up-and-down direction. To fix the front part 311 of the upper hood section, the front-to-back position of the hood is made adjustable by an elongated hole structure 440 having elongated holes in the front-to-back direction provided in three locations. The lamp and the hood are fixed to stays for the lamp and the hood, and a member is provided that allows them to rotate together, so that the lower plate of the plate member 430, which is the mating surface to the magnet of the magnet fixing section 1007, is made adjustable in the up-and-down direction using two elongated holes in the up-and-down direction.

[0049] The two curved arm members 410 are provided on the left and right sides of the vehicle body 100, respectively. The horseshoe member 420 is the member to which the front portion 311 of the upper hood is attached. The plate member 430 is a member that protrudes from the bottom of the horseshoe member 420 and is detachably locked to the vehicle body 100. The position of the front portion 311 of the upper hood when closed can be adjusted vertically with respect to the vehicle body 100 by changing the length of the plate member 430. The longitudinal direction of the two curved arm members 410 is the front-rear direction of the vehicle body. The rear ends of the two curved arm members 410 are rotatably attached to the vehicle body 100, respectively. Both ends of the horseshoe member 420 are attached to the front ends of the two curved arm members 410, respectively. The position of the front portion 311 of the upper hood when closed can be adjusted in the front-rear direction of the vehicle body 100 with respect to the vehicle body 100 by utilizing the elongated hole structure 440 for attaching the front portion 311 of the upper hood to the horseshoe member 420.

[0050] In a configuration where the front part 311 of the upper hood section, which functions as an upper front hood also called the upper front part hood, rotates to open and close, the closed front part 311 of the upper hood section fits over the front hood section 320, which is a lower hood also called the front hood, from the front, and also fits over the left hood section 330 and the right hood section 340, which are left and right side hood sections. Here, the front part 311 of the upper hood section is configured to be adjustable in front of and behind the stays of the lamp and hood members that rotate the hood, by having an elongated hole structure 440 with an elongated hole in the front-to-back direction for fixing to the stays of the lamp and hood members. Furthermore, the mating plate that attaches to the magnet of the magnet fixing part 1007 provided on the front part of the stays of the lamp and hood is configured to be adjustable in the vertical direction. By making the front-to-back position of the front part 311 of the upper hood section independently adjustable, it becomes possible to match its front-to-back position with the front hood section 320. Furthermore, by making the magnetic fixing plate of the magnetic fixing part 1007 adjustable in the vertical direction, the vertical position of the closed upper hood front part 311 can be adjusted, and the overlapping gap with the left hood part 330 and the right hood part 340 can be aligned. As a result, the alignment when the rotatable hood is closed can be made consistent, improving the appearance.

[0051] Thus, the closed upper hood front portion 311 is positioned to overlap the front hood portion 320, which is the lower hood front portion, from the front, and overlaps the left hood portion 330 and the right hood portion 340, which are the left and right side hood portions, respectively. The upper hood front portion 311, which functions as an upper front hood, is configured to be adjustable in the front-rear position of the hood with respect to the aforementioned member stays by having an elongated hole structure 440 with elongated holes in the front-rear direction for fixing to the member stays of the lamp and hood that rotate the hood, and the mating plate that attaches to the magnet of the magnet fixing portion 1007 provided on the front part of the lamp and hood stays is configured to be adjustable in the vertical direction.

[0052] As shown in Figures 10(a) and 10(b), which are explanatory diagrams (parts one and two) of the air dispersion by the diagonally positioned air cleaner of the rice transplanter according to the embodiment of the present invention, the air cleaner device 600 and the fuse box 1001 are arranged. There is an airflow indicated by the arrow, and even when hot air flowing from right to left hits the air cleaner of the air cleaner device 600, the air is dispersed diagonally forward and backward, allowing the hot air to flow smoothly.

[0053] With a flow of hot air from right to left above the front engine, the air cleaner of the air cleaner unit 600 is positioned diagonally, and the fuse box 1001 is positioned next to the left side of the air cleaner. By positioning the air cleaner unit 600 diagonally, even when the hot air flowing from right to left hits the air cleaner unit 600, the air is dispersed diagonally forward and backward, creating a smooth airflow that prevents hot air from accumulating and improving the cooling efficiency of the engine compartment under the hood. In addition, by positioning the fuse box 1001 next to the left side of the air cleaner unit 600, which is in the air cleaner unit 600's shadow, the air cleaner unit 600 disperses the hot air forward and backward, preventing it from directly hitting the fuse box 1001, thus protecting the electrical components. Furthermore, by positioning the air cleaner unit 600 diagonally, it can be positioned as far forward as possible so that it fits between the diagonally positioned headlights on the left and right sides of the front of the hood, eliminating the need to position the air cleaner unit 600 directly above the engine oil filler cap below, thus improving maintainability.

[0054] As shown in Figures 11(a) and 11(b), which are explanatory diagrams (parts one and two) of the arrangement of the reserve tank in the rice transplanter according to the embodiment of the present invention to avoid obstructing the airflow, the engine coolant reserve tank 540 is positioned. There is an airflow indicated by the arrow, and the markings on the engine coolant reserve tank 540 are visible from outside the net portion 301 of the engine hood 300.

[0055] The engine hood 300 is provided with a net section 301 for visually checking the coolant level of the engine coolant reserve tank 540, which is covered by the engine hood 300.

[0056] With a flow of hot air from right to left above and in front of the front engine, the engine coolant reserve tank 540 is positioned to the left of the engine 210. The left side of the engine and the left side of the engine coolant reserve tank 540 are configured to form a net section 301. The air flowing from right to left disperses and flows to the front, rear, and above the engine 210 once it hits it. Therefore, since there is no airflow to the left of the engine 210, positioning the engine coolant reserve tank 540 to the left of the engine 210 ensures that the large surface area of ​​the engine coolant reserve tank 540 does not obstruct the flow of hot air, improving the cooling efficiency of the engine compartment under the hood. Furthermore, if the left side of the engine coolant reserve tank 540 is a net section 301 and the inside is somewhat visible from the outside, the coolant level can be seen from there, allowing the coolant level to be checked at all times, thus improving maintainability.

[0057] Thus, one possible configuration is one in which a flow of hot air from right to left is formed above the front engine 210, the air cleaner device 600 is positioned diagonally, the fuse box 1001, which is an electrical component fuse box, is positioned next to the air cleaner on the left side, the engine coolant reserve tank 540 is positioned to the left of the engine 210, and the left side of the engine 210 and the left side of the engine coolant reserve tank 540 become the net portion 301 of the engine hood 300.

[0058] This section describes the first air cleaner configuration for a front engine that reduces the intake air temperature of the air cleaner.

[0059] Despite the fact that high air cleaner intake temperatures can easily lead to a decrease in engine output, front-engine rice transplanters require a compact engine compartment to improve occupancy, which can cause the engine compartment to become very hot, making it often difficult to lower the intake temperature.

[0060] As shown in Figures 12(a) and 12(b), which are explanatory diagrams (parts 1 and 2) of the first air cleaner configuration of the front engine relating to the reduction of the air cleaner intake temperature of the rice transplanter according to an embodiment of the present invention, a slit portion 302 as an exterior slit portion and a fan device 700 that utilizes an electric fan, the portion of which is enclosed by a dotted ellipse, are arranged.

[0061] The engine hood 300 is provided with slits 302 for intake or exhaust of the fan device 700, which is covered by the engine hood 300. At least a portion of the fan device 700 overlaps with the slits 302 when viewed from the front of the vehicle.

[0062] The exterior of the engine compartment is provided with a slit section 302 having multiple slits for drawing in or expelling outside air. A front-engine configuration is conceivable in which the electric fan of the fan device 700 is positioned so that it overlaps with a portion of the slits when viewed from the front. This is expected to have the effect of efficiently drawing in or expelling the high heat from the engine compartment to the outside.

[0063] As shown in Figure 12(c), which is an explanatory diagram (part three) of the first air cleaner configuration of the front engine relating to the reduction of the air cleaner intake temperature of the rice transplanter according to an embodiment of the present invention, a heat shield plate 910 as a partition plate and an electric fan of the fan device 700 are arranged. The intake direction of the electric fan in the first pattern is indicated by an arrow.

[0064] A heat shield plate 910 is provided as a partition between the engine compartment and the column 1005, and the electric fan described above is supported by the partition plate. The intake or exhaust direction of the electric fan in the first pattern is as shown in Figure 12(c). With this configuration, outside air is drawn in through the guide groove of the lever, such as the main shift lever guide groove 921 on the column side, which is expected to further reduce the temperature of the space on the column side. Furthermore, heat from the engine compartment is released to the outside through the exterior slits of the slit section 302.

[0065] As shown in Figure 13(a), which is an explanatory diagram (fourth) of the first air cleaner configuration of the front engine relating to the reduction of the air cleaner intake temperature of the rice transplanter according to an embodiment of the present invention, a heat shield plate 910 as a partition plate, an electric fan of the fan device 700, and an air cleaner intake hose 610 are arranged.

[0066] The air cleaner intake hose 610 passes through a hole in the heat shield 910, and the intake port is positioned on the side of the column 1005. The above-described electric fan configuration makes it possible to lower the air cleaner intake temperature.

[0067] As shown in Figures 13(b) and 13(c), which are explanatory diagrams (five and six) of the first air cleaner configuration of the front engine relating to the reduction of the air cleaner intake temperature of the rice transplanter according to an embodiment of the present invention, a main shift lever guide groove 921 is arranged as an HST lever guide groove. Such arrangement is made so as to protrude from the heat shield plate 910.

[0068] The air cleaner intake port of the air cleaner intake hose 610 is located near the main shift lever guide groove 921. This is expected to reduce the amount of hot air drawn in that has circulated from the engine compartment into the column compartment. The electric fan of the fan device 700 also increases the intake force.

[0069] The intake or exhaust direction of the electric fan of the fan device 700 may be reversed. In this case, a second pattern of intake or exhaust direction for the electric fan is adopted, in which air is drawn in through the slits of the slit section 302 provided on the exterior and discharged from the main transmission lever guide groove 921. In manned robotic rice transplanters, etc., it is not a problem if hot air comes out of the main transmission lever guide groove 921, so an improvement in the efficiency of engine room hot air discharge can be expected.

[0070] The electric fan mentioned above may also have a forward / reverse rotation mechanism.

[0071] In cold climates, it would be acceptable to have a control system that temporarily disables the electric fan during engine startup. This improves engine performance during startup.

[0072] This section describes the second air cleaner configuration for a front engine that reduces the air cleaner intake temperature.

[0073] As shown in Figure 14(a), which is an explanatory diagram (part 1) of the second air cleaner configuration of the front engine relating to the reduction of the air cleaner intake temperature of the rice transplanter according to an embodiment of the present invention, the exterior of the engine hood 300, the radiator of the radiator device 500, the radiator fan shroud 530, the air cleaner intake hose 610, and the heat shield plate 910 as a partition plate are arranged.

[0074] An air cleaner hose, such as the air cleaner intake hose 610, is passed through a hole in the heat shield 910, and further through a hole in the radiator fan shroud 530, with the intake port positioned at the back of the radiator of the radiator device 500. For example, by drawing in outside air through the net of the net section 301 assembled to the exterior, the intake air temperature can be lowered. By shortening the air cleaner hose in the engine compartment, such as the air cleaner intake hose 610, the distance the hose is exposed to hot air is reduced, which is expected to reduce the intake air temperature.

[0075] As shown in Figure 14(b), which is an explanatory diagram (part two) of the second air cleaner configuration of the front engine relating to the reduction of the air cleaner intake temperature of the rice transplanter according to an embodiment of the present invention, the air cleaner intake port of the air cleaner intake hose 610 is located. The height of the outer casing covering this area by two rectangles is increased.

[0076] Only the exterior height shown in Figure 14(b) is increased. This allows airflow to be efficiently drawn in through the air cleaner intake.

[0077] Thus, a configuration is conceivable in which outside air is drawn in from the column-side lever guide groove, such as the main shift lever guide groove 921, by providing a slit section 302 having multiple slits for drawing in or expelling outside air on the exterior of the engine compartment of the engine 210, arranging a fan device 700, which is an electric fan, so as to overlap with a part of the slits of the slit section 302 in a front view, and supporting the fan device 700 on a heat shield plate 910 which serves as a partition plate provided between the engine compartment and the column 1005.

[0078] (3) Next, the configuration and operation of the rice transplanter according to the embodiment of the present invention will be described in more detail.

[0079] This section explains the mounting configuration of the oil pan guard and the effects of adding the cover.

[0080] As shown in Figure 15, which is an explanatory diagram (part 1) of the oil pan guard mounting configuration and cover addition effect of an embodiment of the present invention for a rice transplanter, the crank pulley cover 2002, oil pan guard 2003, and lower flywheel cover 2004 are arranged. In the bottom view of the machine body, the rear side (opposite the front side) and the left side are indicated by arrows. The oil pan guard 2003 is assembled to the mounting rubber plate 2001 at four locations indicated by circles.

[0081] The oil pan guard 2003 is mounted to the main frame's mounting rubber plate 2001. By mounting it to the main frame, it is less susceptible to the effects of muffler vibrations, resulting in a configuration that reduces the shaking and rattle of the covers. Therefore, the thickness of the covers is not made excessively thick, and weight is reduced. In addition, even if something hits the oil pan guard 2003, there is no risk of damaging the engine 210.

[0082] As shown in Figures 16(a) to 16(c), which are explanatory diagrams (parts two to four) of the oil pan guard mounting configuration and cover addition effect of the rice transplanter according to the embodiment of the present invention, the oil pan 2005 and engine fan 2006 are arranged. The direction of the airflow from the engine fan 2006 is indicated by the arrow.

[0083] The crank pulley cover 2002 is positioned to efficiently direct the airflow from the engine fan 2006 towards the oil pan 2005. This is expected to lower engine oil temperature and improve engine performance.

[0084] As shown in Figures 17(a) and 17(b), which are explanatory diagrams (parts one and two) of the transmission configuration of the front engine of a robotic rice transplanter according to an embodiment of the present invention, the engine 210, main frame 3001, HST device 3002 as a transmission device, engine pulley 3003, intermediate pulley 3004, HST pulley 3005, radiator fan 520, intermediate pulley fan 3004f, and HST pulley fan 3005f are arranged. There is an airflow in the direction indicated by the arrows. In the transmission configuration with a front engine layout, the distance between the engine 210 and the HST device 3002 is long, so it is necessary to increase the belt tension, which puts a load on the engine 210 and the HST device 3002. For example, an intermediate pulley 3004 is provided on the main frame 3001, and the heat balance is improved by a fan provided for each pulley.

[0085] In a rice transplanter with the engine 210 positioned at the front and the HST device 3002 as a transmission unit positioned midship, a configuration can be considered that allows power transmission without causing engine or HST overload, even when the distance between the engine output and the HST is large. An intermediate pulley 3004 is provided at a point approximately midway between the engine 210 and the HST device 3002, with a pin extending from the main frame 3001. Power is transmitted by belts between the engine pulley 3003 and the intermediate pulley 3004, and between the intermediate pulley 3004 and the HST pulley 3005. When the distance between the engine 210 and the HST device 3002 is large, the tension load needs to be increased, which makes pulley overload more likely. As a result, the engine 210, which is positioned on a mounting rubber, is more likely to be pulled towards the HST, which can lead to unstable power transmission. However, since excessive belt tension force is not applied, stable power transmission can be achieved.

[0086] A radiator fan 520, an intermediate pulley fan 3004f, and an HST pulley fan 3005f are installed on each power-transmitting shaft. By aligning the fan airflow direction, heat dissipation is promoted throughout the entire aircraft. Heat tends to be generated from the high-temperature engine section, and this heat can circulate within the aircraft, worsening the heat balance. However, by preventing heat from the engine 210 from flowing back to the HST side, heat dissipation can be promoted throughout the entire aircraft, including the transmission system and rear case.

[0087] As shown in Figures 18(a) and 18(b), which are explanatory diagrams (parts one and two) illustrating the utilization of waste heat from the front engine of a robotic rice transplanter according to an embodiment of the present invention, a radiator core 3006 and an engine fan 2006 are arranged. In the utilization of waste heat in a front engine layout, in order to promote and utilize heat dissipation within the narrow engine room of the rice transplanter, for example, the high-temperature side of a thermocouple power generation module is attached to the engine head cover of the engine 210, and the generated electricity is used to rotate a fan such as the engine fan 2006 located on top of the engine. Since both sides of the engine become passages, heat can be promoted downwards from the engine while securing space.

[0088] Because rice transplanters perform low-speed and high-load operations, the engine compartment of the 210 engine tends to become hot. However, since the engine compartment is often covered on top and open on the bottom, a thermocouple power generation module is installed on the hot side of the engine head cover, and a fan is rotated according to the amount of power generated. The airflow direction is changed depending on whether the machine is moving or not; when moving, the air flows from above to below the 210 engine, and when stationary, the angle is adjusted to prevent exhaust heat from returning. Although the engine compartment tends to get hot, an improvement in heat balance is expected, and the charge / discharge balance will be stabilized.

[0089] Because rice transplanters perform low-speed and high-load operations, the engine compartment of the engine 210 tends to become hot. However, since the engine compartment is often covered on top and open on the bottom, the radiator of the radiator unit 500 is installed above the engine head, and a fan such as the engine fan 2006 is installed between the radiator core 3006 of the radiator unit 500 and the engine 210 to promote heat dissipation by blowing air towards the engine. The engine compartment tends to get hot, and people get on and off the rice transplanter from the front, but by leaving space on the sides, workability is improved and the heat from the engine 210 is prevented from rising upwards.

[0090] Because rice transplanters perform low-speed and high-load operations, the engine compartment of the engine 210 tends to become hot. However, since the engine compartment is often covered on top and open on the bottom, the radiator of the radiator device 500 is installed above the engine head, and a fan such as the engine fan 2006 is installed between the radiator core 3006 of the radiator device 500 and the engine 210. By directing airflow towards the engine, heat dissipation is promoted, and the fan maintains a minimum rotation speed while changing the airflow volume according to the temperature, increasing the rotation speed when the temperature is high. The engine compartment tends to get hot, and entry and exit are done from the front of the rice transplanter, but by leaving space on the sides, workability is improved and the heat from the engine 210 is prevented from rising upwards.

[0091] As shown in Figure 19, which is an explanatory diagram (part 1) of the folding joint configuration of the 10-row rotor of the rice transplanter according to an embodiment of the present invention, the extension part 4001 and the claw clutch 4002 are arranged.

[0092] The folding drive joint of the 10-row rotor is driven by a claw clutch 4002. When a load is applied to both outer rotors, the claw clutch 4002 slides, disengaging the drive to both outer rotors. Because the 10-row rotor has a wide overall width, if it interferes with the ridge when planted in the headland, it may put a load on the drive shaft and other components, potentially causing damage. However, when a load is applied to both outer rotors, the claw clutch 4002 slides, disengaging the drive to both outer rotors, thus preventing damage to the drive shaft and rotor shaft. Furthermore, because the claw clutch 4002 is located in the folding section, maintenance can be easily performed.

[0093] As shown in Figure 20, which is an explanatory diagram (part two) of the folding joint configuration of the 10-row rotor of the rice transplanter according to an embodiment of the present invention, the extension part 4001, the claw clutch 4002, and the sensing switch 4003 are arranged.

[0094] The folding drive joint section of the 10-row rotor is driven by a claw clutch 4002. When a load is applied to both outer rotors, the claw clutch 4002 slides, disengaging the drive to both outer rotors. A pivot point is provided next to the joint section on both outer rotors to support the rotor. A sensing switch 4003, which functions as a proximity switch that detects when the claw clutch 4002 slides, is installed at the pivot point. When the sensing switch 4003 detects movement, the entire rotor is controlled to move to the retracted position. Because the 10-row rotor has a wide overall width, if it interferes with the ridge when planted in the headland, it may put a load on the drive shaft and other components, potentially causing damage. However, when a load is applied to both outer rotors, the claw clutch 4002 slides, disengaging the drive to both outer rotors, and the entire rotor rises to the retracted position, thus preventing damage to the drive shaft, rotor shaft, and rotor.

[0095] As shown in Figure 21, an explanatory diagram of the folding safety device switch arrangement for the 10-row planting frame of the rice transplanter according to an embodiment of the present invention, the proximity switch 5001 is located inside the folding part indicated by the arrow.

[0096] A proximity switch 5001, which functions as a sensing proximity switch, is provided inside the folding mechanism of the 10-row planting frame to prevent improper operation of the planting section when folded. If the safety device switch is located on the outside of the frame, it is susceptible to influence from mud and other elements, which may lead to false detection or damage. However, by providing the proximity switch 5001 inside the folding mechanism of the planting frame, false detection and damage can be prevented without external influence.

[0097] As shown in Figures 22(a) to 22(c), which are explanatory diagrams (parts 1 to 3) of the arrangement of the fertilizer duct suction hose of the rice transplanter according to the embodiment of the present invention, the electrical components 6001 and the suction duct inlet 6002 are arranged.

[0098] In the front-engine configuration, the fertilizer duct hose is routed from the rear of the fertilizer spreader through the floor step and the sloping section leading to the seat, to the intake duct inlet 6002 at the front foot level. In the left-right position, it is routed inside the inner wheels. Electrical components 6001, such as the controller and relays, are located under the seat. Since the intake duct inlet 6002 is located at the inner wheels, it is prone to drawing in mud and water, often requiring a cover. However, if the intake duct inlet 6002 is located within the step and higher than the foot level, airflow can be reliably performed without being affected by mud from the field. Because the intake duct inlet 6002 and the electrical components 6001 are close together, there is always airflow, which prevents the electrical components 6001 from getting damp and prevents corrosion problems due to rust, etc.

[0099] [Regarding the measurement unit with a receiving device and the inertial measurement device] The mobile unit is equipped with a receiving device that acquires positional information using a satellite positioning system, a measurement unit that mainly has a secondary inertial measuring device (equivalent to an "inertial measuring device") capable of detecting the inclination (pitch angle, roll angle) of the mobile unit, and a main inertial measuring device that measures inertial information.

[0100] The main inertial measurement device and the secondary inertial measurement device are each composed of an IMU (Inertial Measurement Unit).

[0101] The measurement unit, which includes a receiving device and a secondary inertial measuring device, and the main inertial measuring device are located at the same location on the vehicle body. For example, they are installed on the upper part of the antenna stay member 800. In addition, the measurement unit, which includes a receiving device and a secondary inertial measuring device, and the main inertial measuring device are located on the left-right centerline of the vehicle body.

[0102] The Global Navigation Satellite System (GNSS) mentioned above is best known as the Global Positioning System (GPS). GPS uses multiple GPS satellites orbiting the Earth, control stations that track and control the GPS satellites, and receiving devices on the vehicle being positioned to measure the position of the receiving device. The receiving device is used to acquire the vehicle's position information through the satellite positioning system. [Industrial applicability]

[0103] The work vehicle in this invention can be made more user-friendly and is useful for use as a work vehicle such as a rice transplanter. [Explanation of Symbols]

[0104] 100 car bodies 210 engine 220 Traveling device 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 Engine Hood 301 Internet Department 302 Slit section 310 Upper hood section 311 Front part of the upper hood 312 Rear of the upper hood section 320 Front hood section 330 Left side hood section 340 Right side hood section 410 Curved arm member 420 Horseshoe component 430 Plate members 440 Slotted Hole Structure 500 Radiator System 510 Radiator Body 520 Radiator Fan 530 Radiator Fan Shroud 530f Shroud Flat Section 540 Engine coolant reserve tank 600 Air Cleaner System 610 Air cleaner intake hose 700 Fan Device 800 Antenna stay component 910 Heat shield 920 Operating Control Panel 921 Main shift lever guide groove 1001 Fuse Box 1002 Engine oil tank 1003 Oil level gauge 1004 Knob Bolt 1005 Column 1006 Front step protrusion 1007 Magnetic fixing part 2001 Mounting Rubber Plate 2002 Crank Pulley Cover 2003 Oil Pan Guard 2004 Flywheel Cover 2005 Oil Pan 2006 Engine Fan 3001 Mainframe 3002 HST equipment 3003 Engine Pulley 3004 Intermediate Pulley 3004f Intermediate Pulley Fan 3005 HST Pulley 3005f HST Pulley Fan 3006 Radiator Core 4001 Extension 4002 Claw Clutch 4003 Sensing switch 5001 Proximity Switch 6001 Electrical components 6002 Intake duct inlet

Claims

1. An engine (210) is located on the front side of the vehicle body (100), The engine hood covering the engine (210), Multiple antenna stay members (800) erected on the vehicle body (100), The system includes a receiving device that acquires position information by a satellite positioning system, an inertial measuring device, and a control unit that controls the steering unit based on the information from the receiving device and the information from the inertial measuring device. The aforementioned engine hood can be opened and closed by utilizing a rotating mechanism. A work vehicle characterized in that the receiving device and the inertial measuring device are supported at the same location on the plurality of antenna stay members (800) that extend above the engine hood.

2. The engine hood has an upper hood section (310), a front hood section (320), a left hood section (330), and a right hood section (340). The upper hood portion (310) has an upper hood portion front portion (311) and an upper hood portion rear portion (312), The front portion (311) of the upper hood can be opened and closed relative to the rear portion (312) of the upper hood by utilizing a rotating structure. The pivot structure of the front part (311) of the upper hood is a front-opening pivot structure. The work vehicle according to claim 1, characterized in that the front portion (311) of the upper hood is opened upward relative to the rear portion (312) of the upper hood by utilizing the front-opening rotating structure.

3. The system includes an air cleaner device (600) covered by the engine hood, which has an air cleaner intake hose (610). A heat shield (910) is provided between the engine (210) and the operating control panel (920). The work vehicle according to claim 2, characterized in that the air cleaner intake port of the air cleaner intake hose (610) is located near the main gear lever guide groove (921) provided on the operating control panel (920).

4. The system includes a radiator unit (500) erected on the left or right side of the engine (210), which comprises a radiator body (510), a radiator fan (520), and a radiator fan shroud (530). The front and upper ends of the radiator fan (520) protrude so as not to overlap with the radiator body (510) when viewed from the side of the vehicle. The work vehicle according to claim 3, characterized in that the wall portion of the radiator fan shroud (530) is configured not to overlap with the front end and upper end of the radiator fan (520) in a side view of the vehicle body.

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