Work vehicle

Abstract

To provide a work vehicle that provides improved usability because usability of a known work vehicle as a rice-planting machine is not always good when convenient functions are used.SOLUTION: A work vehicle includes: an engine (210) disposed in a front part of a vehicle body; an engine hood covering the engine (210); and a plurality of antenna stay members (800) vertically disposed on the vehicle body. The engine hood uses a rotational structure and thus is openable / closable. The rotational structure is a front opening rotational structure. By using the front opening rotational structure, the engine hood is opened upward. The engine hood is arranged between the plurality of antenna stay members (800) as viewed from the front of the vehicle body. At the time of opening the engine hood upward, the engine hood comes into contact with the plurality of antenna stay members (800).SELECTED DRAWING: Figure 2

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), and is provided with, the engine hood is openable and closable by utilizing a rotation structure, The rotation structure is a front-opening rotation structure, By using the front-opening rotation structure, the engine hood can be opened upward, The engine hood is disposed between the plurality of antenna stay members (800) in a front view of the vehicle body, When the engine hood is opened upward, the engine hood abuts against the plurality of antenna stay members (800) and is held with the engine hood open A work vehicle characterized by this.

[0008] According to a second aspect of the present invention, 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 part (311) and an upper hood portion rear part (312), The front part (311) of the upper hood portion is openable and closable with respect to the rear part (312) of the upper hood portion by using a rotation structure, The rotation structure of the front part (311) of the upper hood portion is a front-opening rotation structure, The work vehicle according to claim 1, characterized in that the front part (311) of the upper hood portion is opened upward with respect to the rear part (312) of the upper hood portion by using the front-opening rotation structure.

[0009] According to a third aspect of the present invention, an air cleaner device (600) covered by the engine hood having an air cleaner intake hose (610) is provided, A heat shield plate (910) is provided between the engine (210) and the operation panel (920), The work vehicle according to claim 2, characterized in that an air cleaner intake port of the air cleaner intake hose (610) is disposed in the vicinity of a main shift lever guide groove (921) provided in the operation panel (920).

[0010] The fourth aspect of the present invention includes a radiator device (500) erected on the left or right side of the engine (210), which has a radiator body (510), a radiator fan (520), and a radiator fan shroud (530). The front end side and the upper end side of the radiator fan (520) protrude so as not to overlap with the radiator body (510) in a side view of the vehicle body. The working vehicle according to claim 3, wherein the wall portion of the radiator fan shroud (530) is configured so as not to overlap with the front end side and the upper end side of the radiator fan (520) in a side view of the vehicle body.

Advantages of the Invention

[0011] According to the first aspect of the present invention, it is possible to improve usability.

[0012] According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, it is possible to further improve usability.

[0013] According to the third aspect of the present invention, in addition to the effect of the second aspect of the present invention, it is possible to improve convenience.

[0014] According to the fourth aspect of the present invention, in addition to the effect of the third aspect of the present invention, it is possible to simplify the configuration.

Brief Description of the Drawings

[0015]

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Embodiments for Carrying Out the Invention

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

[0017] The same applies hereinafter, but some components may not be shown in the drawings, or may be shown perspectively or omitted.

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

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

[0020] While explaining the operation of the rice transplanter according to the present embodiment, the operation control method of the work vehicle related to the present invention, which is realized by a controller or the like, will also be explained.

[0021] The rice transplanter according to the present embodiment is a rice transplanter for traveling the vehicle body 100 with 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 based on a manual steering operation or an automatic steering operation in a steering device 230, while performing field preparation by a soil preparation device 260 having a rotor 261 and a float 262, planting seedlings in the field by a seedling planting device 240 having a seedling planting tool 241, and applying fertilizer to the field by a fertilizer application device 250.

[0022] The traveling device 220, the seedling planting device 240, the fertilizer application device 250, and the soil preparation device 260 are driven by the power of an engine 210 transmitted through a transmission mechanism having a main transmission device and a sub-transmission device that utilize an HST.

[0023] The rice transplanter according to the present embodiment is a specific example of the 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 FIGS. 2(a) and 2(b), which are explanatory views (parts one and two) of the front engine bonnet opening and closing configuration of the rice transplanter in the embodiment of the present invention, a radiator device 500 having a cap, an air cleaner device 600, a fuse box 1001, an engine coolant reserve tank 540 having a cap, an engine oil tank 1002, and an oil level gauge 1003 operated by inserting a hand from above are arranged.

[0026] An engine hood 300 that covers the engine 210 provided at the front side portion of the vehicle body 100 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 part 311 and an upper hood portion rear part 312. The upper hood portion front part 311 can be opened and closed with respect to the upper hood portion rear part 312 by using a rotation structure.

[0027] The rotation structure of the upper hood portion front part 311 is a front-opening rotation structure. The upper hood portion front part 311 can be opened upward with respect to the upper hood portion rear part 312 by using the front-opening rotation structure.

[0028] In the engine hood 300, which is a front engine specification bonnet, only the front half part of the upper surface is configured to be rotatable and openable by about 45 degrees with a vicinity of the rear end of that part as a fulcrum. When this part is opened, the air cleaner device 600, the fuse box 1001, the cap of the radiator device 500, the cap of the engine coolant reserve tank 540, the engine oil tank 1002, and the oil level gauge 1003, which are engine-related parts, are arranged in a visible position. By only opening this part, all daily inspections related to the engine can be performed, and it is configured to enable easy work without tools. Even if an antenna stay member 800, which is a straight-ahead antenna stay, is arranged within the bonnet range, a configuration within the narrow range between them is possible.

[0029] In this way, by using the engine 210 provided at the front side of the vehicle body 100 and the engine hood 300 that covers the engine 210, a part of the upper hood portion 310, the front hood portion 320, the left hood portion 330, and the right hood portion 340 can be removed from the vehicle body 100, and a mode in which a part of the upper surface in front of the upper hood portion 310 can be opened and closed is conceivable. By only opening this part, all daily inspections related to the engine can be performed, and the configuration can be easily operated without tools. Even if the antenna stay member 800, which is a straight-ahead antenna stay, is arranged within the range of the engine hood 300, which is also called a bonnet, a configuration within the narrow range therebetween is possible.

[0030] As shown in FIGS. 3(a) to 3(c), which are explanatory views (Parts One to Three) of the left and right part mounting configuration of the front engine hood of the rice transplanter according to the embodiment of the present invention, fixing is performed at one location by the knob bolt 1004, and fixing is also performed by hooking a part of the column 1005 of the left hood portion 330 and the right hood portion 340. In order to be able to slide the left hood portion 330 and the right hood portion 340 forward and remove them, the front step convex portions 1006 are arranged as two lower convex shapes, and by sandwiching the front step convex portions 1006 between the convex portions provided corresponding to the front step side, pressing is performed to suppress an undesired spread of the hood portion outward.

[0031] More specifically, the attachment of the left hood part 330 and the right hood part 340, which are the left and right parts of the engine hood, to the machine is carried out as follows. That is, the long hole-shaped grooves provided at the upper rear parts of the left hood part 330 and the right hood part 340 are inserted into the column 1005 from the front and fixed by hooking them. The upper front parts of the left hood part 330 and the right hood part 340 are fixed from the inside of the hood with knob bolts 1004. Convex shapes are provided at the front and rear lower parts of the left hood part 330 and the right hood part 340 so as not to spread outward by the convex parts provided on the front step. After opening the front upper hood part 311 of the upper surface of the hood and removing the front hood part 320 of the hood fixed with a hook, the left hood part 330 and the right hood part 340 are slid forward and removed by simply removing one knob bolt 1004 from the inside. As a result, the left hood part 330 and the right hood part 340 of the left and right parts of the engine hood can be easily removed without tools, so that it becomes possible to easily remove dirt such as mud caused by flywheel winding on the left side of the vehicle body, and it becomes possible to easily clean the radiator fin part on the right side of the vehicle body during actual work. Also, even if the attachment positions of the left and right parts of the hood on the machine side vary, the positioning point is only one knob bolt part by the knob bolt 1004, and it becomes possible to easily align and assemble the members.

[0032] As described above, the front upper hood part 311 of a part of the upper surface opens with respect to the rear upper hood part 312 at the fulcrum near the rear end of the engine hood 300, and the left hood part 330 and the right hood part 340, which are at least the left and right hood parts that can be partially removed from the vehicle body 100, are provided with a fixing part that can be fixed to the steering column side such as the column 1005, and a mode of sliding forward and removing is conceivable.

[0033] As shown in FIG. 4, which is an explanatory diagram (part one) of the radiator cooling shroud configuration of the rice transplanter in the embodiment of the present invention, the relevant part for the following explanation is surrounded by a dotted ellipse.

[0034] The radiator device 500 is a device 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 end side and the upper end side of the radiator fan 520 protrude so as not to overlap with the radiator body 510 in a side view of the vehicle body. The wall portion of the radiator fan shroud 530 is configured so as not to overlap with the front end side and the upper end side of the radiator fan 520 in a side view of the vehicle body.

[0035] Regarding the arrangement of the radiator device 500, the radiator fan 520, which is a cooling fan, is arranged so as to protrude forward and upward of the radiator body 510, and no wall is provided on the shroud portion of the radiator fan shroud 530 where the radiator fan 520 protrudes, so that air can be sucked in from there. It is assumed that there is a gap between the radiator fan shroud 530 and the exterior at the front and above the radiator body 510. If there is a gap between the radiator fan shroud 530 and the exterior, there is a concern that, without any special measures, the hot air on the engine side may flow into the intake side of the radiator device 500 through this gap. However, by offsetting the radiator fan 520 and creating a flow of air from the outside air to the engine 210 also outside the radiator device 500, the hot air trying to flow in can be returned to the engine side again by this flow, and a configuration can be achieved in which hot air does not flow into the intake side of the radiator device 500 even if there is a gap around it. Without providing an expensive and difficult configuration to fill the gap between the radiator fan shroud 530 and the exterior, an efficient cooling configuration can be achieved, resulting in an inexpensive and easy configuration.

[0036] As shown in FIGS. 5(a) to 5(c), which are explanatory views (parts two to four) of the radiator cooling shroud configuration of the rice transplanter in the embodiment of the present invention, the hot air on the engine side passes through the gap between the radiator fan shroud 530 and the exterior and circulates into the radiator intake side, being drawn into the air flow passing through the upper opening of the shroud and then returning to the engine side again. This is the air flow W1. The outside air forms an air flow W2 that passes through the upper opening of the shroud and flows above the engine without passing through the radiator fin portion of the radiator device 500. And there is an air flow W3 in which the outside air passes through the radiator fin portion, hits the engine 210, and flows around the engine in the front, rear, upper, and lower directions. In an efficient engine cooling configuration without partitioning the room, with respect to the radiator arrangement, the radiator fan 520, which is a cooling fan, is arranged so as to protrude forward and upward. And further, no wall is provided on the shroud portion of the radiator fan shroud 530 where the radiator fan 520 protrudes, and air is also sucked in from there. There is no need to fill the gap between the radiator fan shroud 530 and the exterior. No wall is provided on the shroud portion of the radiator fan shroud 530 behind the radiator, and air is also sucked in from there. A wall is provided that connects to the radiator fan shroud 530. And although the gap between the radiator fan shroud 530 and the exterior is often sealed in a tractor or a rice transplanter to separate the engine side and the radiator intake side rooms and prevent the hot air on the engine side from flowing into the radiator intake side, this gap portion 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 housing of the radiator device 500, and it is desirable that they are not in close contact. That is, there is an air flow that is sucked in through such a gap in the direction indicated by the white arrow, and the exhaust heat at the corner portion of the radiator body 510 covered without the radiator fan shroud 530 protruding is also promoted without problems.

[0038] As shown in FIGS. 6(a) to 6(c), which are explanatory views (Parts 5 to 7) 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 having a configuration similar to a general-purpose configuration, but is provided so as to cover the radiator fin portion. Although a configuration in which the radiator fan shroud 530 is not provided is also conceivable, the above-described effects obtained by covering the rear and lower portions of the radiator body 510 are expected.

[0039] Thus, with respect to the radiator arrangement of the radiator device 500, the radiator fan 520, which is a cooling fan, is arranged so as to protrude forward and upward of the radiator body 510, and no wall is provided in the shroud portion of the radiator fan shroud 530 where the radiator fan 520 protrudes, so that air is sucked in. A mode in which there is a gap between the radiator fan shroud 530 and the exterior is conceivable in front of and above the radiator body 510.

[0040] As shown in FIG. 7, which is an explanatory view of the air cleaner intake configuration of the rice transplanter according to the 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 having the air cleaner intake hose 610. The heat shield plate 910 is provided between the engine 210 and the operation panel 920. The air cleaner intake port of the air cleaner intake hose 610 is arranged in the vicinity of the main shift lever guide groove 921 provided in the operation panel 920.

[0042] The air cleaner intake hose 610 extending from the air cleaner of the air cleaner device 600 disposed above the engine 210 is routed across the heat shield 910 provided on the rear side of the engine, and the intake port at the tip of the air cleaner intake hose 610 provided below the operation panel 920 is disposed near the main shift lever guide groove 921 of the operation panel 920. By providing the tip of the air cleaner intake hose 610 behind the heat shield 910, intake can be performed not from the high-temperature engine side within the bonnet but, for example, from the side of the column 1005 where the temperature is slightly lower, and the intake air temperature that affects engine performance can be lowered. Also, by providing the intake port of the air cleaner intake hose 610 near the main shift lever guide groove 921 which is an opening of the operation panel 920, it becomes easier to suck in outside air, and a configuration is achieved in which the intake air temperature can be further lowered. By disposing the intake port of the air cleaner intake hose 610 near the main shift lever guide groove 921, an air flow from the outside to the inside can be generated in the groove portion of the main shift lever guide groove 921, preventing the hot air inside from reaching the vicinity of the hand of the operator holding the outside main shift lever, and preventing discomfort caused by the hot air during operation.

[0043] Thus, a mode can be considered in which the air cleaner intake hose 610 extending from the air cleaner of the air cleaner device 600 disposed above the engine 210 is routed across the heat shield 910 provided on the rear side of the engine, and the intake port at the tip of the air cleaner intake hose 610 provided below the operation panel 920 is disposed near the main shift lever guide groove 921 of the operation panel 920.

[0044] As shown in FIGS. 8(a) and 8(b), which are explanatory views (Parts 1 and 2) of the hood opening side stopper by the straight-ahead antenna stay of the rice transplanter in the embodiment of the present invention, a groove in the front part of the upper hood part 311 that rotates and opens / closes, and an antenna stay member 800 which is a straight-ahead antenna stay configured in a V shape are disposed.

[0045] The two antenna stay members 800 are members that are erected on the vehicle body 100 side by side in a V shape when viewed from the front of the vehicle body. The front part 311 of the upper hood section is arranged between the two antenna stay members 800 when viewed from the front of the vehicle body, and when it is opened upward with respect to the rear part 312 of the upper hood section, it abuts against the two antenna stay members 800 and stops.

[0046] In a configuration where the front part 311 of the upper hood section, which is the front part of the upper surface of the hood arranged above the engine 210 which is a front engine, rotates and opens and closes, the front part 311 of the upper hood section moves between the two antenna stay members 800 that extend upward. The two antenna stay members 800 are configured in a V shape such that the interval becomes narrower as it goes upward, and the rotating front part 311 of the upper hood section is provided with a groove that avoids the straight-ahead antenna stay part like the antenna stay member 800. When the front part 311 of the upper hood section is opened, the inner side surface of the groove provided to avoid the front part 311 of the upper hood section at a certain angle is sandwiched between the antenna stay members 800 whose V shape narrows, and it is configured to stop without opening further. By using the V-shaped antenna stay member 800 as a stopper that is the limit on the hood opening side, damage to other parts caused by excessive hood opening is prevented. And if a thick and soft rubber or sponge etc. is provided on the inner side surface of the hood, when the front part 311 of the upper hood section is opened and sandwiched, that part is crushed, so a configuration that can hold and fix the front part 311 of the upper hood section at the opened position by these frictional forces and repulsive forces is also conceivable.

[0047] Thus, in a configuration where the front upper hood portion 311, which is the front part of the upper surface of the hood disposed above the front engine 210, rotates and opens / closes, the front upper hood portion 311 moves between two upwardly extending antenna stay members 800. The two antenna stay members 800 are configured in a V shape such that the distance between them narrows as they go upward. A groove for avoiding a straight antenna stay portion like the antenna stay member 800 is provided in the rotating front upper hood portion 311. When the front upper hood portion 311 is opened, the inner side surface of the groove provided to avoid interference of the straight antenna stay of the front upper hood portion 311 at a certain angle is sandwiched between the antenna stay members 800 that narrow in a V shape, and it can be configured to stop without opening further.

[0048] As shown in FIGS. 9(a) to 9(c), which are explanatory views (Parts 1 to 3) of the alignment of the hood opening / closing portion of the rice transplanter according to the embodiment of the present invention, when the front upper hood portion 311 functioning as an upper front hood is fitted so as to cover the front side hood portion 320 which is a lower hood from the front, it is likely to be displaced in the front-rear direction. When the front upper hood portion 311 is fitted so as to overlap the left side hood portion 330 and the right side hood portion 340 which are the left and right side hoods, it is likely to be displaced in the vertical direction. In order to fix the front upper hood portion 311, the hood front-rear position is configured to be adjustable by a long hole structure 440 having front-rear direction long holes provided at three locations. By providing a member for fixing the lamp and the hood to a stay for the lamp and the hood and rotating them integrally, the lower side plate that adheres to the magnet of the magnet fixing portion 1007 inside the upper plate and the lower plate of the plate member 430 is configured to be adjustable in the vertical direction using vertically extending long holes provided at two locations.

[0049] The two curved arm members 410 are members provided on the left and right sides of the vehicle body 100 respectively. The horseshoe member 420 is a member to which the front part 311 of the upper hood part is attached. The plate member 430 is a member protruding from the bottom of the horseshoe member 420 that is detachably locked to the vehicle body 100. The position of the front part 311 of the upper hood part when closed is adjustable in the vertical direction with reference 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 vehicle front-rear direction. The rear ends of the two curved arm members 410 are respectively rotatably attached to the vehicle body 100. Both ends of the horseshoe member 420 are respectively attached to the front ends of the two curved arm members 410. The position of the front part 311 of the upper hood part when closed is adjustable in the vehicle front-rear direction with reference to the vehicle body 100 by using the long hole structure 440 for attaching the front part 311 of the upper hood part to the horseshoe member 420.

[0050] In a configuration where the front portion 311 of the upper hood part, which functions as an upper front hood also called the front part of the hood top surface, rotates and opens / closes, the closed front portion 311 of the upper hood part is fitted so as to cover the front side hood part 320, which is a lower hood also called the front hood surface of the hood, from the front, and is also fitted so as to overlap on the left side hood part 330 and the right side hood part 340, which are the left and right surface hoods of the hood. Here, the front portion 311 of the upper hood part is configured to be adjustable in the front-rear position with respect to the stay by a long hole structure 440 having a front-rear direction long hole for fixing to the lamp for rotating the hood and other members of the hood and the member stay of the hood. And a plate that adheres to the magnet of the magnet fixing part 1007 provided at the front part of the stay of the lamp and the hood is configured to be adjustable in the vertical direction. By making the front-rear position of the front portion 311 of the upper hood part adjustable independently, the front-rear position can be aligned with the front side hood part 320. Also, by making the magnet fixing plate of the magnet fixing part 1007 adjustable in the vertical direction, the vertical position of the closed front portion 311 of the upper hood part can be adjusted, and the gap overlapping with the left side hood part 330 and the right side hood part 340 can be aligned. Thus, it becomes possible to align the fitting when the rotatable hood is closed, and the appearance becomes better.

[0051] In this way, the closed front portion 311 of the upper hood part is made to cover the front side hood part 320, which is the lower hood of the front hood surface of the hood, from the front, and is fitted so as to overlap on the left side hood part 330 and the right side hood part 340, which are the left and right surface hoods of the hood on the left and right sides. The front portion 311 of the upper hood part, which functions as an upper front hood, is configured to be adjustable in the front-rear position with respect to the above-described member stay by a long hole structure 440 having a front-rear direction long hole for fixing to the lamp for rotating the hood and other members of the hood and the member stay of the hood. And a mode can be considered in which a plate that adheres to the magnet of the magnet fixing part 1007 provided at the front part of the stay of the lamp and the hood is configured to be adjustable in the vertical direction.

[0052] As shown in FIGS. 10(a) and 10(b), which are explanatory diagrams (Parts 1 and 2) of the dispersion of wind by the diagonally arranged air cleaner of the rice transplanter in the embodiment of the present invention, the air cleaner device 600 and the fuse box 1001 are arranged. Even when the hot air flowing from right to left hits the air cleaner of the air cleaner device 600 with the wind flow indicated by the arrow, the wind is dispersed obliquely back and forth to smoothly flow the hot air.

[0053] In the presence of a hot air flow from right to left above the front engine, the air cleaner of the air cleaner device 600 is arranged obliquely, and the fuse box 1001 is arranged side by side on the left side of the air cleaner. By arranging the air cleaner device 600 obliquely, even when the hot air flowing from right to left hits the air cleaner device 600, the wind can be dispersed obliquely back and forth, creating a smooth air flow without allowing the hot air to stay there, improving the cooling efficiency of the engine room inside the bonnet. Also, by arranging the fuse box 1001 side by side on the left side of the air cleaner, which is in the shadow of the air cleaner device 600, the air cleaner device 600 disperses the hot air back and forth so that the hot air does not directly hit the fuse box 1001, also playing a role in protecting the electrical components. Furthermore, by arranging the air cleaner device 600 obliquely, the air cleaner device 600 can be arranged as far forward as possible so as to fit between the headlights provided obliquely on the left and right in front of the bonnet, and it is not necessary to arrange the air cleaner device 600 directly above the lower engine oil filler port, thus improving the maintainability.

[0054] As shown in FIGS. 11(a) and 11(b), which are explanatory diagrams (Parts 1 and 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, the engine coolant reserve tank 540 is arranged. There is a wind flow indicated by the arrow, and the scale of the engine coolant reserve tank 540 can be seen from the outside through the net part 301 of the engine hood 300.

[0055] The engine hood 300 is provided with a net portion 301 for visually recognizing the cooling water scale of the engine cooling water reserve tank 540 covered by the engine hood 300.

[0056] With the flow of hot air from right to left above and in front and behind the front engine, the engine cooling water reserve tank 540 is arranged on the left side of the engine 210. And the left side of the engine and the left side of the engine cooling water reserve tank 540 arranged there are configured to be the net portion 301. The air flowing from right to left is dispersed and flows in front of, behind, and above the engine 210 when it hits the engine 210. Therefore, since there is no air flow on the left side of the engine 210, by arranging the engine cooling water reserve tank 540 on the left side of the engine 210, the engine cooling water reserve tank 540 with a certain area is arranged so as not to obstruct the flow of hot air, and the cooling efficiency of the engine room in the bonnet is improved. Also, if the left side of the engine cooling water reserve tank 540 arranged there is the net of the net portion 301 and the inside can be seen to some extent from the outside, the scale of the engine cooling water reserve tank 540 can be seen from there, and the amount of cooling water can always be confirmed, which also improves the maintainability.

[0057] In this way, a mode can be considered in which a flow of hot air from right to left is formed above the front engine 210, the air cleaner device 600 is arranged obliquely, the fuse box 1001 which is an electrical component fuse box is arranged side by side on the left side of the air cleaner, the engine cooling water reserve tank 540 is arranged on the left side of the engine 210, and the left side of the engine 210 and the left side of the engine cooling water reserve tank 540 are configured to be the net portion 301 of the engine hood 300.

[0058] The first air cleaner configuration of the front engine regarding the reduction of the air cleaner intake temperature will be described.

[0059] Although the intake air temperature of the air cleaner is high and engine output reduction is likely to be caused, in the case of a front-engine rice transplanter, it is required to make the engine room compact in order to improve habitability, so the inside of the engine room may become extremely hot and it is often difficult to lower the intake air temperature.

[0060] As shown in FIGS. 12(a) and 12(b), which are explanatory views (Parts 1 and 2) of the first air cleaner configuration of the front engine regarding the reduction of the intake air temperature of the air cleaner of the rice transplanter according to the embodiment of the present invention, a slit portion 302 as an exterior slit portion and a fan device 700 using an electric fan whose location is surrounded by a dotted ellipse are arranged.

[0061] The engine hood 300 is provided with a slit portion 302 for intake or exhaust of the fan device 700 covered by the engine hood 300. At least a part of the fan device 700 overlaps with the slit portion 302 in a front view of the vehicle body.

[0062] The engine room exterior portion is provided with a slit portion 302 having a plurality of slits for inhaling or exhausting outside air, and a front engine configuration can be considered in which the electric fan of the fan device 700 is arranged so as to wrap around a part of the slits in a front view. An effect of efficiently inhaling or exhausting the high heat in the engine room to the outside of the engine room is expected.

[0063] As shown in FIG. 12(c), which is an explanatory view (Part 3) of the first air cleaner configuration of the front engine regarding the reduction of the intake air temperature of the air cleaner of the rice transplanter according to the 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 air direction of the electric fan of the first pattern is indicated by an arrow.

[0064] A heat insulation plate 910 as a partition plate is provided between the engine room and the column 1005, and the above-described electric fan is supported by the partition plate. The intake or discharge direction of the electric fan of the first pattern shall be as shown in FIG. 12(c). With this configuration, it is expected to further keep the space on the column side at a lower temperature by sucking outside air from a guide groove of a lever such as the main shift lever guide groove 921 on the column side. And the heat of the engine room has the effect of escaping outside through the exterior slit of the slit portion 302.

[0065] As shown in FIG. 13(a), which is an explanatory diagram (part four) of the first air cleaner configuration of the front engine regarding the reduction of the air cleaner intake temperature of the rice transplanter in the embodiment of the present invention, a heat insulation 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 penetrates through a hole provided in the heat insulation plate 910, and the intake port is arranged on the side of the column 1005. The air cleaner intake temperature can be lowered by the above-described electric fan configuration.

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

[0068] The air cleaner intake port of the air cleaner intake hose 610 is arranged near the main shift lever guide groove 921. It is expected to reduce the amount of hot air that has flowed from the engine room into the column room. The suction force is also increased by the electric fan of the fan device 700.

[0069] The intake or exhaust direction of the electric fan of the fan device 700 may be reversed. In this case, the intake or exhaust direction of the electric fan of the second pattern, which intakes air through the slit of the slit portion 302 provided on the exterior and exhausts it through the main transmission lever guide groove 921, is adopted. For a manned monitoring robot rice transplanter or the like, there is no problem even if hot air comes out from the main transmission lever guide groove 921, so an improvement in the exhaust efficiency of the engine room hot air can be expected.

[0070] The above-described electric fan may have a forward / reverse mechanism.

[0071] During engine startup in cold regions, etc., control may be provided so that the electric fan does not rotate temporarily. This improves the engine performance during startup.

[0072] A second air cleaner configuration of the front engine regarding reduction of the air cleaner intake temperature will be described.

[0073] As shown in FIG. 14(a), which is an explanatory diagram (part 1) of the second air cleaner configuration of the front engine regarding reduction of the air cleaner intake temperature of the rice transplanter according to the 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 provided in the heat shield plate 910, and further through a hole provided in the radiator fan shroud 530, and the intake port is arranged on the back surface of the radiator of the radiator device 500. For example, the intake temperature can be lowered by sucking outside air through the net of the net portion 301 assembled to the exterior. By shortening the air cleaner hose in the engine room such as the air cleaner intake hose 610, the distance that the hose is exposed to hot air can be shortened, and an effect of reducing the intake temperature can be expected.

[0075] As shown in FIG. 14(b), which is an explanatory diagram (part 2) of the second air cleaner configuration of the front engine for reducing the intake air temperature of the air cleaner of the rice transplanter in the embodiment of the present invention, the air cleaner intake port of the air cleaner intake hose 610 is arranged. The height of the exterior part covered by two rectangles at this location is increased.

[0076] Only the exterior height shown in FIG. 14(b) is increased. The running wind is efficiently inhaled from the air cleaner intake port.

[0077] In this way, a slit portion 302 having a plurality of slits is provided in the exterior portion of the engine room of the engine 210 to inhale or discharge outside air. The fan device 700, which is an electric fan, is arranged so as to wrap around a part of the slits of the slit portion 302 in a front view, and the fan device 700 is supported by a heat insulating plate 910 as a partition plate provided between the engine room and the column 1005. Thus, a mode of inhaling outside air from a column-side lever guide groove such as the main transmission lever guide groove 921 can be considered.

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

[0079] The oil pan guard mounting configuration and the additional effect of the cover will be described.

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

[0081] Assemble the oil pan guard 2003 to the mounting rubber plate 2001 of the main frame. By assembling it to the main frame, it is configured to be less affected by the vibration of the muffler, the covers are less likely to shake, and the vibration is reduced. Therefore, the thickness of the covers is not excessively increased, and weight reduction is achieved. Also, when an object hits the oil pan guard 2003, there is no risk of damaging the engine 210.

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

[0083] The crank pulley cover 2002 is arranged at a position where the wind of the engine fan 2006 is efficiently applied to the oil pan 2005. An effect of lowering the engine oil temperature and improving the engine performance can be expected.

[0084] As shown in FIGS. 17(a) and 17(b), which are explanatory diagrams (parts one and two) of the transmission structure of the robot rice transplanter front engine of the rice transplanter in the embodiment of the present invention, the engine 210, the main frame 3001, the HST device 3002 as a transmission device, the engine pulley 3003, the intermediate pulley 3004, the HST pulley 3005, the radiator fan 520, the intermediate pulley fan 3004f, and the HST pulley fan 3005f are arranged. There is a flow of wind in the wind direction indicated by the arrow. In the transmission structure in the front engine layout, since the distance between the engine 210 and the HST device 3002 is long, it is necessary to increase the belt tension, which places a burden on the engine 210 and the HST device 3002. Therefore, for example, an intermediate pulley 3004 is provided on the main frame 3001 to improve the heat balance by the fans provided for each pulley.

[0085] In a rice transplanter with the engine 210 laid out at the front and the HST device 3002 as a transmission device laid out at the midship, a configuration is conceivable in which power transmission can be performed without causing engine overload and HST overload even when the distance between the engine output section and the HST is long. An intermediate pulley 3004 is provided by extending a pin from the main frame 3001 at a point approximately midway between the engine 210 and the HST device 3002. Belts are wound around the engine pulley 3003 and the intermediate pulley 3004, and around the intermediate pulley 3004 and the HST pulley 3005 to transmit power. When the distance between the engine 210 and the HST device 3002 is long, it is necessary to increase the tension load and pulley overload is likely to occur. Therefore, the engine 210 arranged on the mounting rubber is likely to be pulled toward the HST side and power may not be stably transmitted. However, since the belt tension force is not applied too much, stable power transmission can be achieved.

[0086] A radiator fan 520, an intermediate pulley fan 3004f, and an HST pulley fan 3005f are respectively provided on each shaft for transmitting power. By aligning the fan air directions, heat dissipation of the entire machine body is promoted. Heat dissipation from the high-temperature engine part is likely to occur, and the heat dissipation may circulate within the machine body and deteriorate the heat balance. However, since the heat dissipation from the engine 210 is prevented from flowing around to the HST side, heat dissipation of the entire machine body including the transmission device and the rear case can be promoted.

[0087] As shown in FIGS. 18(a) and 18(b), which are explanatory diagrams (Parts 1 and 2) of the exhaust heat utilization of the front engine of the rice transplanter in the embodiments of the present invention, a radiator core 3006 and an engine fan 2006 are arranged. In the exhaust heat utilization in the front engine layout, in order to promote and utilize the exhaust heat in the narrow engine room of the rice transplanter, for example, the high-temperature side of the thermoelectric power generation module is attached to the engine head cover of the engine 210, and the generated electric power is used to rotate a fan such as the engine fan 2006 provided above the engine. Since both sides of the engine serve as passages, it is possible to promote the exhaust heat downward while ensuring space.

[0088] Since the rice transplanter performs low-speed and high-load operations, the inside of the engine room of the engine 210 tends to become hot. However, since the upper side of the engine room is covered and the lower side is often open, by providing a thermoelectric power generation module on the high-temperature side of the engine head cover portion, the fan is rotated according to the amount of power generated. Then, depending on whether the vehicle is running or not, the wind direction is changed. During running, the wind is made to flow from above the engine 210 downward, and in the stopped state, the angle is adjusted so that the exhaust heat does not return. Although the engine room tends to become hot, an improvement in heat balance is expected, and the charge-discharge balance becomes stable.

[0089] Since the rice transplanter performs low-speed and high-load operations, the inside of the engine room of the engine 210 tends to become hot. However, since the upper side of the engine room is covered and the lower side is often open, a radiator of the radiator device 500 is provided above the engine head, and a fan such as the engine fan 2006 is provided between the radiator core 3006 of the radiator device 500 and the engine 210, and the exhaust heat is promoted by blowing air against the engine side. Although the engine room tends to become hot and people get on and off from the front of the rice transplanter, by leaving space on the side, the workability is improved, and the heat of the engine 210 is prevented from rising upward.

[0090] Since the rice transplanter performs operations at low speeds and under high loads, the engine room of the engine 210 tends to become hot. However, since the upper side of the engine room is covered and often open at the bottom, a radiator of the radiator device 500 is provided above the engine head, and a fan such as the engine fan 2006 is provided between the radiator core 3006 of the radiator device 500 and the engine 210. By blowing air towards the engine side, heat dissipation is promoted. The fan changes the air volume according to the temperature while ensuring the minimum rotation speed, and increases the rotation speed at high temperatures. The engine room tends to get hot, and people get on and off from the front of the rice transplanter. By leaving space on the side, workability is improved and the heat of the engine 210 is prevented from rising upwards.

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

[0092] The folding drive joint portion of the 10-row rotor is configured to be driven by the claw clutch 4002. When a load is applied to the rotors on both outer sides, the claw clutch 4002 slides and the drive on both outer sides is cut off. Since the total width of the 10 rows is wide, if it interferes with the ridge during pillow planting, there is a risk of damage to the drive shaft etc. due to the load. However, when a load is applied to the rotors on both outer sides, the claw clutch 4002 slides and the drive on both outer sides is cut off, so damage to the drive shaft and rotor shaft can be prevented. And since the claw clutch 4002 is provided at the folding portion, maintenance can be easily carried out.

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

[0094] The configuration is such that the folding drive joint part of the 10-row rotator is driven by the claw clutch 4002. When a load is applied to the rotators on both outer sides, the claw clutch 4002 slides and the drive to both outer sides is cut off. A fulcrum part for supporting the rotator is provided beside the joint parts on both outer sides, and a sensing switch 4003 that functions as a proximity switch to sense when the claw clutch 4002 slides on the fulcrum part is provided. When the sensing switch 4003 senses, control is performed so that the entire rotator is in the storage position. Since the 10 rows have a wide overall width, if planted on the ridge in a way that interferes with the ridge, there is a risk of applying a load to the drive shaft etc. and causing damage. However, when a load is applied to the rotators on both outer sides, the claw clutch 4002 slides and the drive to both outer sides is cut off, and the entire rotator rises to the storage position, so damage to the drive shaft, rotor shaft, and rotator can be prevented.

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

[0096] When the 10-row planting frame is folded inside, a proximity switch 5001 that functions as a sensing proximity switch is provided to prevent the planting part from operating inappropriately. If the safety device switch is provided outside the frame, it is likely to be affected by mud etc. and may lead to mis-sensing or damage. However, since the proximity switch 5001 is provided inside the folding part of the planting frame, mis-sensing and damage can be prevented without being affected by the outside.

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

[0098] In the front-engine specification, the arrangement of the fertilizer duct hose is such that in the front-rear direction, it passes from the rear of the fertilizer applicator through the inclined portion from the floor part inside the floor step to the seat sheet to the front foot position of the suction duct inlet 6002. In the left-right position, it passes inside the inner wheels. Under the seat sheet, there is a configuration where electrical components 6001 such as a controller and a relay are arranged. Since the suction duct inlet 6002 is in the so-called inner wheel, it is easy to suck in muddy water and the like, and a cover is likely to be required. However, if the suction duct inlet 6002 is inside the step and at a position higher than the foot floor position, the blowing can be surely carried out without being affected by mud from the field. Since the suction duct inlet 6002 and the electrical components 6001 are close, there is always a flow of wind, and it is possible to prevent problems such as corrosion of the electrical components 6001 due to moisture and rust.

Industrial Applicability

[0099] The work vehicle according to the present invention can improve usability and is useful for the purpose of being used in work vehicles such as rice transplanters.

Explanation of Signs

[0100] 100 Vehicle body 210 Engine 220 Travel device 221 Front wheel 222 Rear wheel 230 Steering device 240 Seedling planting device 241 Seedling planter 250 Fertilizer applicator 260 Land preparation device 261 Rotor 262 Float 300 Engine hood 301 Net part 302 Slit part 310 Upper hood part 311 Front part of the upper hood part 312 Rear part of the upper hood part 320 Front hood part 330 Left hood part 340 Right hood part 410 Curved arm member 420 Horseshoe member 430 Plate member 440 Long hole structure 500 Radiator device 510 Radiator body 520 Radiator fan 530 Radiator fan shroud 530f Shroud flat part 540 Engine coolant reserve tank 600 Air cleaner device 610 Air cleaner intake hose 700 Fan device 800 Antenna stay member 910 Heat shield 920 Operation 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 convex part 1007 Magnet fixing part 2001 Mounting rubber plate 2002 Crank pulley cover 2003 Oil pan guard 2004 Flywheel cover 2005 Oil pan 2006 Engine fan 3001 Main frame 3002 HST device 3003 Engine pulley 3004 Intermediate pulley 3004f Intermediate pulley fan 3005 HST pulley 3005f HST pulley fan 3006 Radiator core 4001 Extension part 4002 Pawl Clutch 4003 Sensing Switch 5001 Proximity Switch 6001 Electrical Component 6002 Inlet of Suction Duct

Claims

1. An engine (210) provided at 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); It is equipped with The engine hood can be opened and closed by utilizing a pivoting structure, The pivot structure is a front-open pivot structure, By utilizing the front-opening rotation structure, the engine hood can be opened upward, The engine hood is disposed between the plurality of antenna stay members (800) when viewed from the front of the vehicle body, A work vehicle characterized in that, when the engine hood is opened upward, the engine hood abuts against the plurality of antenna stay members (800), and the engine hood is maintained in an open position.

2. 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 upper hood front portion (311) can be opened and closed relative to the upper hood rear portion (312) by utilizing a pivot structure, The pivot structure of the upper hood portion front part (311) is a front-open pivot structure, 2. The work vehicle according to claim 1, wherein the upper hood front portion (311) is opened upward relative to the upper hood rear portion (312) by utilizing the front-opening pivot structure.

3. The vehicle is provided with an air cleaner device (600) covered by the engine hood, the air cleaner device having an air cleaner intake hose (610), A heat shield (910) is provided between the engine (210) and the driving operation panel (920), 3. The work vehicle according to claim 2, characterized in that an air cleaner intake port of the air cleaner intake hose (610) is arranged in the vicinity of a main shift lever guide groove (921) provided in the driving operation panel (920).

4. The engine (210) includes a radiator device (500) having a radiator body (510), a radiator fan (520), and a radiator fan shroud (530), the radiator device being provided upright on the left or right side of the engine (210), The front end side and the upper end side of the radiator fan (520) protrude so as not to overlap with the radiator body (510) in a side view of the vehicle body, 4. The work vehicle according to claim 3, wherein a wall portion of the radiator fan shroud (530) is configured so as not to overlap with the front end side and the upper end side of the radiator fan (520) in a side view of the vehicle body.

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