JP5765817B2 - Rice transplanter - Google Patents

Description

  The present invention relates to, for example, a rice transplanter that includes a seedling stage and a seedling planting claw and performs seedling planting work continuously.

  2. Description of the Related Art Conventionally, in a work vehicle such as a tractor that performs farm work on a farm field, an engine is mounted on a traveling vehicle and the engine is covered with a bonnet. Specifically, an engine and a cooling fan are arranged inside the bonnet, an inner cover is installed in the bonnet, the engine and the muffler are covered with the inner cover, and a passage for cooling air of the cooling fan is formed inside the inner cover. (For example, refer patent document 1). Also, in the rice transplanter, a technology is also known in which an engine, an air cleaner, etc. are arranged inside the bonnet, outside air is taken into the bonnet from the upper part of the body cover step, and warm air inside the bonnet is discharged toward the lower part of the step. (For example, see Patent Document 2).

Japanese Patent Laid-Open No. 5-42830 JP 2001-199251 A

  As shown in Patent Document 1, the conventional technology moves the cooling air from the rear to the front of the engine, so that the engine warm air can be discharged to a position away from the driver seat behind the bonnet. As shown in Document 2, when an air cleaner is placed near the engine, the air cleaner is heated by the warm air of the engine and the muffler covered by the inner cover, so cold air is sent from the air cleaner to the carburetor. However, there is a problem that the output efficiency of the engine cannot be increased and the fuel consumption cannot be reduced. Moreover, in the conventional rice transplanter, as shown in Patent Document 2, since the engine cooling air is passed in the left-right direction of the bonnet, when the spare seedling stage is arranged on the left-right side of the bonnet, When warm air is exhausted from the exhaust opening opened on the side surface, there is a problem that the seedling (mat) mounted on the preliminary seedling stage is dried by the warm air.

  An object of the present invention is to provide a rice transplanter that can easily prevent an increase in the ambient temperature of an air cleaner attached to an engine and supply relatively cool air from the air cleaner to a carburetor compared to warm air of the engine. It is.

In order to achieve the object, the invention of claim 1 includes a traveling vehicle (1) equipped with an engine (2), a planting part (15) provided in the traveling vehicle (1), and the engine (2). In a rice transplanter equipped with an engine cooling fan (67) and an air cleaner (75) attached to the fan, a fan case (66) for arranging the engine cooling fan (67) and an engine cover for arranging the air cleaner (75) (74) is installed inside the hood (9) covering the engine (2) and outside the engine (2), and the fan case (66) is positioned on the side of the engine (2). The engine cover (74) is positioned above the engine (2), and an oil cooler (70) is provided on the cooling air suction inlet side of the engine (2), while the bonnet ( ) And the engine cover (74), an electrical component (84) is disposed, the interior of the engine cover (74) is communicated with the fan case (66), and the engine cooling fan (67 ) Is supplied to the inside of the engine cover (74) and discharged from a side surface of the engine that is different from the side on which the engine cooling fan is installed, and the engine (2) A single baffle plate (81) for merging and guiding the cooling air flowing forward from both the left and right sides of the engine is provided on the front side of the engine (2), and the hot air after the engine (2) is distributed The wind guide plate (81) is configured to join the wind guide plate and discharge it below the engine. The wind guide plate (81) collects the joined wind and the join portion (81a) that joins the winds from the left and right. Guide to discharge The side discharge portion (81b) is formed in an L shape when viewed from the front, while the output shaft (51) and the transmission belt (52) system are disposed on the front surface of the engine (2), and the merging portion (81a) and the lower side The output shaft (51) and the transmission belt (52) system are positioned in a space (83) formed by the discharge portion (81b) .

According to invention of Claim 1, the traveling vehicle (1) carrying the engine (2), the planting part (15) provided in the traveling vehicle (1), and the engine cooling attached to the engine (2) In a rice transplanter including a fan (67) and an air cleaner (75), a fan case (66) in which the engine cooling fan (67) is disposed and an engine cover (74) in which the air cleaner (75) is disposed. The fan case (66) is positioned on the side of the engine (2) inside the bonnet (9) covering the engine (2) and outside the engine (2). The cover (74) is positioned above the engine (2) and an oil cooler (70) is provided on the cooling air suction inlet side of the engine (2), while the bonnet (9) and the engine are disposed. An electrical component (84) is disposed between the cover (74), the inside of the engine cover (74) is communicated with the inside of the fan case (66), and the cooling air from the engine cooling fan (67) is supplied. , said supplied to the inside of the engine cover (74), and configured to drain from different aspects is the installation side of the engine cooling fan of the side surfaces of the engine, before the left and right sides of said engine (2) A single air guide plate (81) for merging the cooling air discharged in the direction and guiding it downward is provided on the front side of the engine (2), and the hot air after the engine (2) is distributed by the air guide plate The wind guide plate (81) is configured to join and discharge to the lower side of the engine. Ejection part (81b And an output shaft (51) and a transmission belt (52) system are arranged on the front surface of the engine (2), and the merging portion (81a) and the lower discharge portion (81b) Since the output shaft (51) and the transmission belt (52) system are positioned in the space (83) formed by the air cleaner, an increase in the ambient temperature of the air cleaner can be easily prevented. Cool air can be supplied from the air cleaner to the carburetor, and the engine efficiency can be improved.

  In addition, if an oil cooler is provided on the cooling air suction inlet side of the engine, and an electrical component is disposed between the bonnet and the engine cover, a dedicated cooling fan for the oil cooler becomes unnecessary, and the engine The oil cooler can be downsized by first cooling the oil cooler by the outside air that is sucked. Furthermore, since the engine room in the bonnet can be divided into a high temperature part and a low temperature part, the intake air temperature of the engine can be lowered with a simple structure, and the engine performance can be improved. Moreover, since an electronic device etc. can be arrange | positioned in a low-temperature part, the said electrical component can be protected easily and durability of the said electrical component can be improved. The durability of electronic equipment is improved. By dividing the inside of the bonnet, the degree of freedom in design increases when the electrical components are arranged in the engine room. In addition to reducing adverse effects such as direct transmission of heat from the engine to the electrical components, it is also possible to reduce inconvenience that the heat generated by the electrical components is transmitted to the air cleaner, and the performance (quality of both the electrical components and the air cleaner) ) Can be held.

Further, the output shaft and the transmission belt system are arranged on the side surface of the engine, and include a wind guide plate having a merging portion for merging the cooling air of the engine and a lower discharge portion that guides downward. because are configured to disposed the output shaft and a transmission belt system in a space portion formed by the said discharge part and the merging part, it can arranged a transfer structure of the engine in a compact, miniaturized body it can. The durability of the transmission belt system can be improved.

It is the whole rice transplanter side view. It is a whole top view of a rice transplanter. It is the whole rice transplanter front view. It is a side view of a vehicle body. It is a top view of a vehicle body. It is a perspective view of an engine part. It is a side view of an engine part. It is a top view of an engine part. It is a front view of an engine part. It is a perspective explanatory view of an engine part. It is a perspective explanatory view of an engine part. It is a section explanatory view of a bonnet part. It is a plane explanatory view of a bonnet part. It is explanatory drawing of an engine cooling part. It is front explanatory drawing of a bonnet part. It is explanatory drawing of an engine throttle part. It is explanatory drawing of a transmission pedal part. It is explanatory drawing of a forked wire part. It is explanatory drawing of a wire joint part. It is a perspective view of a fixed frame part. It is a perspective view of a fixed frame part. It is other explanatory drawing of a forked wire part.

  Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a side view of the whole, FIG. 2 is a plan view of the same, FIG. 3 is a front view of the same, FIG. 4 is a side view of the vehicle body, FIG. 5 is a plan view of the vehicle. The air-cooled engine 2 is mounted on the vehicle body frame 3, the front wheels 6 for paddy field travel are supported on the side of the transmission case 4 via the front axle case 5, and the rear axle case 7 behind the transmission case 4 is traveled on the paddy field. The rear wheel 8 is supported. The spare seedling stage 10 is attached to both sides of the bonnet 9 that covers the engine 2 and the like, and the mission case 4 and the like are covered by a vehicle body cover 11 on which an operator rides, and a seat frame 12 is disposed above and behind the vehicle body cover 11 via a seat frame 12. A driver's seat 13 is attached, and a steering handle 14 is provided at the rear of the bonnet 9 in front of the driver's seat 13.

  In the figure, reference numeral 15 denotes a planting part having a seedling mounting table 16 for eight-row planting, a plurality of seedling planting claws 17 and the like. The planting case 20 is supported by the planting case 20 through the lower rail 18 and the upper rail 19 so as to be slidable to the left and right, and a rotary case 21 that rotates at a constant speed in one direction is supported by the planting case 20. A pair of nail cases 22 and 22 are arranged at symmetrical positions around the axis, and seedling planting nails 17 and 17 are attached to the tips of the nail cases 22 and 22.

  Further, the hitch bracket 23 on the front side of the planting case 20 is connected to the rear side of the traveling vehicle 1 through an elevating link mechanism 26 including a top link 24 and a lower link 25, and the planting unit 15 is moved up and down via the link mechanism 26. The hydraulic lifting cylinder 27 is connected to the lower link 25, and the front and rear wheels 6 and 8 are driven to move, and at the same time, the seedlings 16 are slid back and forth, and one seedling is planted by the planting claws 17. It is configured to carry out rice transplanting work to take out and plant seedlings continuously.

  In the figure, 28 is a main transmission lever, 29 is a planting operation lever for raising and lowering the planting part 15, planting clutch on / off, and marker operation, 30 is a transmission pedal, 31 is an accelerator lever, and 32 is a unit clutch lever. It is.

  Further, in the figure, 33 is a center two leveling center float, 34 is a left and right two leveling side float, 35 is a left and right outermost one leveling auxiliary float, and 36 is a fertilizer in a fertilizer hopper 37. This is an eight-row side strip fertilizer that is discharged to a side strip groover (not shown) of each of the floats 33, 34, and 35 with an air blowing force.

  4 to 5, the vehicle body frame 3 is divided into a front frame 39, an intermediate frame 40, and a rear frame 41, and the engine 2 is connected to the pair of left and right front frames 39, and the pair of left and right intermediate frames 40. A front axle case 5, a pair of left and right rear frames 41 are provided with a rear axle case 7 and a fuel tank 42 for supplying fuel to the engine 2. A front frame 43 and a base frame 44 are provided between the front side and the middle of the front frame 39. And the engine 2 is mounted on the fixed bracket 45 and the base frame 44 of the front frame 39 via the vibration isolating rubber 46.

  Further, a power steering case 47 is provided on the left side of the front surface of the transmission case 4 and a continuously variable hydraulic transmission (HST) 48 is provided on the right side of the case 4 so that the shift input pump shaft 49 of the hydraulic transmission 48 is directed forward of the vehicle body. The pump shaft 49 is connected to the transmission shaft 50 in the front-rear direction on the lower right side of the engine 2, and the transmission shaft 50 is connected to the output shaft 51 of the engine 2 via the transmission belt 52. Is transmitted to the hydraulic transmission 48.

  Further, the transmission case 4 and the rear axle case 7 are integrally connected by a pipe-like connecting frame 53 on the longitudinal center line of the vehicle body, and the traveling output shaft 54 and the PTO output shaft 55 are projected to the rear of the transmission case 4 so that the rear axle is The travel output shaft 54 is connected to the rear input shaft 56 that protrudes forward from the case 7 via a rear transmission shaft 57, and power is transmitted from the travel output shaft 54 to the left and right rear wheels 8. Further, the PTO output shaft 55 is connected to an intermediate shaft 59 provided on the bearing 58 at the upper part of the rear axle case 7 via a universal joint shaft 60, and the intermediate shaft 59 is connected to the input shaft of the planting case 20 via a universal joint shaft. Power is transmitted from the PTO output shaft 55 to the planting unit 15.

  6 to 14, a muffler 62 of the engine 2 is attached to the lower side of the step base 61 on the left outer side of the front frame 39, and a battery 64 for starting the engine 2 on the step base 63 on the right outer side of the front frame 39 is installed. A battery base 65 is attached.

  In addition, an engine cooling fan 67 is disposed in the fan case 66 on the rear side of the engine 2, and a cooling air intake 68 is opened substantially at the center of the rear surface of the fan case 66, and a dust-proof net 69 is stretched over the intake 68. An oil cooler 70 such as engine oil, transmission oil, transmission (HST) oil, etc. is arranged in a vertical shape and a horizontally long shape at a position behind the intake port 68, and the oil cooler 70 is arranged via a mounting base 71 and a mounting plate 72. The cooling effect of the oil cooler 70 is obtained by forcibly cooling the oil cooler 70 using the engine cooling fan 67 without being separately provided with a cooling fan dedicated to the oil cooler 70 by being connected to and supported by the handle column 73 of the steering handle 14. And the oil cooler 70 can be assembled in a compact and compact manner.

  Further, the rear upper side of the engine 2 is covered with a quadrangular box-shaped cover 74, the air cleaner 75 of the engine 2 is disposed in the air cleaner cover 74, and the air cleaner cover is placed in the fan chamber 76 in the fan case 66. 74 is connected to the cleaner chamber 77, and the front upper side of the engine 2 is covered with a front-view portal exhaust cover 78, and a cooling exhaust passage 79 communicating with the cleaner chamber 77 is formed inside the exhaust cover 78. Then, as shown in FIG. 15, the cooling air after flowing through the cleaner chamber 77 is exhausted outwardly from the air exhaust port 80 opened in the front surface of the bonnet 9 through the air exhaust passage 79, so that the temperature of the cleaner chamber 77 is increased. The rise is suppressed, and cool air is sent to the carburetor to increase the output of the engine 2 and improve the fuel consumption. The air exhaust port 80 is disposed above the step 11a of the vehicle body cover 11. The air exhaust from the air exhaust port 80 does not hit the seedling of the cocoon and can prevent the seedling from being damaged.

  Further, as shown in FIG. 10, a single air guide plate 81 is provided on the front side of the engine 2 for merging hot air (engine cooling air) circulating and discharged forward from the left and right sides of the engine 2 and guiding it downward. Therefore, the baffle plate 81 has an L-shaped front guide plate 81 having a confluence portion 81a for converging the winds from the left and right, and a lower discharge portion 81b for collecting and guiding the merged air to the left and discharging it downward, and the confluence portion 81a The shape of the upper corner 3 (upper, left, right, forward) is formed by guide surfaces 81c each having an obtuse angle so that the hot air after circulation of the engine 2 smoothly joins at the merging portion 81a and the lower side of the discharging portion 81b It is configured to improve the hot air discharge efficiency by discharging the air well downward from the discharge port 82. Further, the output shaft 51 and the transmission belt 52 system are compactly arranged in a space 83 formed inside the merging portion 81a and the discharge portion 81b, thereby making it possible to easily reduce the size of the machine body.

  Further, an electrical component 84 such as a relay related to the engine 2 is disposed above the covers 74 and 78, and the electrical component 84 is detachably attached to a frame 85 connected to the front frame 43 and the handle column 73 via the electrical mount 86. Even in the structure in which the electrical component 84 is disposed at a position close to the upper side of the engine 2, adverse effects such as direct transfer of the heat of the engine 2 to the electrical component 84 are reduced, and the heat generated in the electrical component 84 is reduced. The inconvenience transmitted to the air cleaner 75 is also reduced, and the performance (quality) of both the electrical component 84 and the air cleaner 75 is stably maintained.

  As shown in FIGS. 16 to 18, the throttle lever 87 of the engine 2 is disposed at the lower position of the exhaust cover 78, and the accelerator lever 31 disposed on the right side of the steering handle 14 and the lower position of the accelerator lever 31. A throttle lever 87 is linked to a shift pedal 30 to be provided via a bifurcated accelerator wire 88. The tip of the bifurcated wire portions 88a and 88b of the accelerator wire 88 is connected to the shift pedal 30 and the accelerator lever 31, and The tip of one wire portion 88c is connected to the throttle lever 87 so that the engine speed can be changed by any operation of the shift pedal 30 and the accelerator lever 31.

  The shift pedal 30 is pivotably connected to a pedal shaft 89 via a pedal arm 90, a shift operation cam 91 is fixed to the pedal shaft 89, and the swash plate angle of the hydraulic transmission 48 (hydraulic pump) is fixed. The operation cam 91 is connected to the control shaft 92 for adjusting the speed via the speed change rod 93, and the speed maintaining cam 96 for engaging the notch 94 with the notch 94 of the operation cam 91 is provided. The control shaft 92 is sometimes rotated to change the vehicle speed.

  Further, an outer tube 98 of a wire portion 88a is connected to the pedal arm 90 via an outer receiver 97, and one end side of a spring 99, which is an elastic body, is connected to the distal end of the wire portion 88a. The other end of the spring 99 is connected to the fixed frame 101 to which the rotary shaft 100 is attached, and when the shift pedal 30 is stepped on, the outer tube 98 is moved with respect to the wire portion 88a (inner wire) and the throttle lever 87 is operated. The vehicle speed is changed and the engine speed is changed.

  Further, as shown in FIG. 19, the wire portion 88 b to be connected to the accelerator lever 31 connects the locking member 103 to the arm 102 integral with the lever 31, and the two wire portions 88 a and 88 b of the shift pedal 30 and the accelerator lever 31 are connected. The other end side is connected to a single connecting body 104, and the connecting body 104 is slidably inserted into a joint 106 that is connected to the outer tubes 98 and 105 of the wire portions 88a and 88b. When the accelerator lever 31 is not operated (0 position), the wire portions 88a and 88b are loosened to keep the connecting body 104 at the phantom line position in FIG. 19, and either one of the wires is operated by operating the speed change pedal 30 or the accelerator lever 31. When the portion 88a or 88b is pulled, as shown in the solid line state in FIG. 4 to move the to constitute a throttle lever 87 pulls the single wire portion 88c to operate in a high speed H side.

  In this way, the wire lever 88b is loosened when the accelerator lever 31 that is the engine rotation speed change operation member for operating the throttle lever 87 is operated at 0 or low speed, and the speed change pedal 30 is preferentially operated, and when the accelerator lever 31 is operated at high speed H, the connection is established. The body 104 is moved to the high speed side by the stroke L and given priority over the speed change pedal 30, and it is accurately changed to the optimum work speed (traveling) mode according to various work situations such as when escaping a wetland that requires low speed and high torque. Thus, workability can be improved.

  As shown in FIGS. 20 and 21, the fixed frame 101 is fixed to the upper surface of the fixed frame 101 by fixing the front and rear ends between the fixed bracket 107 at the rear end of the front frame 39 and the mounting member 108 at the front end of the rear frame 41. A base end of the speed change pedal 30 is swingably supported on the pedal base 109 via the rotation shaft 100.

  Further, as shown in FIG. 22, the wire 88a may be directly connected to the operation cam 91 or the pedal arm 90 via a spring 99.

  As is clear from the above, a shift pedal 30 that is a work shift operation member that includes a hydraulic transmission (HST) 48 that is driven by the output of the engine 2 to shift a work speed such as a vehicle speed, and that shifts the transmission 48, By connecting the throttle lever 87, which is an engine speed changing member for changing the engine speed, via the accelerator wire 88, which is a connecting member, the engine speed is always kept at a low speed when the vehicle is running at a low speed or stopped. The engine can be driven quietly and effectively, and work can be performed satisfactorily. When the seedling work is performed, the work can be automatically performed silently. It is possible to prevent the inconvenience that the engine 2 becomes insufficiency when the engine speed is low, and when the vehicle is started or stopped, the engine speed is set to a low speed as the vehicle travels. It can be carried out smooth start and stop.

  In addition, the throttle lever 87 is connected to the accelerator lever 31 and the speed change pedal 30 via a bifurcated wire 88, and a dispersion preventing spring 99, which is an elastic body, is interposed between the speed change pedal 30 and the wire 88, whereby the wire 88 and Simple operation using the spring 99 makes the operation stroke on the shift pedal 30 side larger than the operation stroke on the accelerator lever 31 side to prevent variation in operation, and the operation speed can be always changed at a stable engine speed. Therefore, it is possible to improve the reliability of the work, and it is possible to perform a good high-speed work in which the speed change pedal 30 and the accelerator lever 31 are completely positioned at a high speed.

  As is clear from the above description and FIGS. 1, 13, and 14, the traveling vehicle 1 equipped with the engine 2, the planting portion 15 provided in the traveling vehicle 1, the engine cooling fan 67 attached to the engine 2, and The rice transplanter provided with the air cleaner 75 includes a fan case 66 that forms a fan chamber 76 on the outer side of the engine 2, an engine cooling fan 67 is disposed in the fan chamber 76, and an upper surface side cover that covers the upper side of the engine 2. A cover 74 for the air cleaner 75 is provided, and the inside of the cover 74 for the air cleaner 75 is communicated with the fan chamber 76 so that exhaust air from the engine cooling fan 67 is supplied to the inside of the cover 74 for the air cleaner 75. Since the air cleaner 75 is configured, an air cleaner 75 attached to the engine 2 is disposed inside the cover 74 for the air cleaner 75. , It can easily prevent an increase or the like of the ambient temperature of the air cleaner 75.

  As is clear from the above description and FIGS. 1, 13, and 14, the traveling vehicle 1 equipped with the engine 2, the planting portion 15 provided in the traveling vehicle 1, the engine cooling fan 67 attached to the engine 2, and A rice transplanter equipped with an air cleaner 75 includes a fan case 66 that forms a fan chamber 76 on the outer side of the engine 2, an engine cooling fan 67 is disposed in the fan chamber 76, and a cleaner chamber 77 on the outer side of the engine 2. The air cleaner 75 is disposed in the cleaner chamber 77, and the cleaner chamber 77 is communicated with the fan chamber 76, and the exhaust air from the engine cooling fan 67 is passed through the cleaner chamber 77. Since it is configured to discharge to the outside, an increase in the ambient temperature of the air cleaner 75 attached to the engine 2 can be easily prevented. The carburetor 75, can provide a relatively cool air in comparison with the warm-up of the engine 2, etc., it can reduce the fuel consumption or can increase the output efficiency of the engine 2.

  As is clear from the above description and FIGS. 1 and 14, the driver's seat 13 is provided in the traveling vehicle 1, and the engine 2 is covered by the bonnet 9, and an exhaust passage 79 communicating with the cleaner chamber 77 is formed. An air exhaust cover 78 is provided, and an air exhaust port 80 is formed on the front side surface of the bonnet 9 away from the driver's seat 13, and the cleaner chamber 77 is communicated with the air exhaust port 80 through an air exhaust path 79. Therefore, for example, even if the preliminary seedling stage 10 is disposed on the left and right sides of the bonnet 9, the warm air discharged from the air outlet 80 opened on the front side of the bonnet 9 causes the left and right sides of the bonnet 9 to be It is possible to prevent the seedling (mat) mounted on the preliminary seedling stage 10 from drying. Therefore, the preliminary seedling stage 10 can be easily arranged on the left and right sides of the bonnet 9.

  As apparent from the above description and FIGS. 1, 14, and 15, a step 11 a is formed on the vehicle body cover 11 provided in the traveling vehicle 1, and the engine 2 is covered by the bonnet 9, and the cover for the air cleaner 74, a cleaner chamber 77 is formed on the upper surface side of the engine 2, and an exhaust port 80 is disposed at a higher position on the side surface of the bonnet 9 than the step 11 a, and the exhaust of the cleaner chamber 77 is discharged from the exhaust port 80 to the bonnet 9. Since it is configured to be discharged toward the outside, when the seedling placed on the heel is replenished to the spare seedling platform 10 of the traveling vehicle 1 with the front portion of the traveling vehicle 1 facing the heel In addition, the exhausted air discharged from the exhaust port 80 does not hit the seedling placed in the cocoon. Therefore, when the seedling is replenished, the seedling placed on the ridge can be prevented from being damaged.

DESCRIPTION OF SYMBOLS 1 Traveling vehicle 2 Engine 9 Bonnet 11 Body cover 11a Step 13 Driver's seat 15 Planting part 66 Fan case 67 Engine cooling fan 74 Engine cover (upper side cover, air cleaner cover)
75 Air cleaner 76 Fan chamber 77 Cleaner chamber 78 Exhaust cover 79 Exhaust passage 80 Exhaust port

Claims (1)

A traveling vehicle (1) equipped with an engine (2), a planting part (15) provided in the traveling vehicle (1), an engine cooling fan (67) and an air cleaner (75) attached to the engine (2) In rice transplanter equipped with
A fan case (66) for disposing the engine cooling fan (67) and an engine cover (74) for disposing the air cleaner (75) are arranged inside the bonnet (9) covering the engine (2). It is installed outside the engine (2), wherein the fan case (66) is positioned after the way side of the engine (2), said engine cover (74) is positioned on the upper side of the engine (2),
An oil cooler (70) is provided on the cooling air suction inlet side of the engine (2), while an electrical component (84) is disposed between the bonnet (9) and the engine cover (74),
The inside of the engine cover (74) is communicated with the inside of the fan case (66), and the cooling air of the engine cooling fan (67) is supplied to the inside of the engine cover (74). The side of (2) is configured to discharge from a side different from the installation side of the engine cooling fan (67) ,
A single air guide plate (81) is provided on the front side of the engine (2) for merging and guiding the cooling air circulated and discharged forward from both the left and right sides of the engine (2). The hot air after distribution is combined with the air guide plate and discharged to the lower side of the engine, and the air guide plate (81) is joined with a confluence portion (81a) for combining the winds from the left and right. The lower discharge part (81b) that collects and guides the wind downward is formed into an L shape in front view, while the output shaft (51) and the transmission belt (52) system are arranged on the front of the engine (2), Rice transplanter characterized in that the output shaft (51) and the transmission belt (52) system are positioned in a space (83) formed by the merging portion (81a) and the lower discharge portion (81b). .

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