However, there has been a demand for lightening and compacting in order to reduce sinking to the faucet or to shorten the electric field to reduce the immersion, and there is a restriction on the engine mounting space in the traveling gas ). In addition, it is necessary to attach various peripheral components such as a power transmission system to various types of watches or mission cases as well as a cooling fan. Therefore, it is required to efficiently or compactly arrange peripheral parts together with the engine in a narrow engine mounting space while considering the cooling efficiency.
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is a technical object to provide a rice planting machine in which peripheral components such as a cooling system component and a power transmission system component are efficiently and compactly arranged around the engine while improving cooling efficiency.
According to a first aspect of the present invention, there is provided a vehicular automatic transmission comprising an engine mounted on a traveling vehicle, a transmission case for transmitting the power of the engine to the traveling part of the traveling vehicle, and a seedling- Wherein the engine is arranged so as to protrude downward from both the base frames between a pair of left and right base frames constituting the traveling base, And the oil cooler is arranged so as to face the suction fan from the lower side of the covering front bonnet.
According to a second aspect of the present invention, in the first aspect of the present invention, the electric component disposed above the oil cooler is exposed to a flow port formed on the lower side of the front bonnet, The cooler and the electric component.
According to a third aspect of the present invention, the exhaust fan is provided on the other side of the engine opposite to the suction fan, separately from the suction fan.
According to claim 4 of the present invention, the engine is mounted on an engine mount attached to the running vehicle through a dustproof member, and the engine mount is provided with a through hole facing the bottom surface of the engine.
According to a fifth aspect of the present invention, in the fourth aspect, the engine is disposed on the engine mount so that cooling air flows from the through hole toward the exhaust fan, the engine being displaced from the through hole.
(Effects of the Invention)
According to the present invention, there is provided a vehicle comprising: an engine mounted on a traveling vehicle; a transmission case for transmitting the power of the engine to the traveling part of the traveling vehicle; and a seedling-type device mounted on the traveling vehicle, Wherein the engine is disposed so as to protrude downward from both the base frames between a pair of left and right base frames constituting the traveling base, The oil cooler is cooled earlier than the engine by the cooling wind introduced mainly from below the gas frame by the rotation of the suction fan because the oil cooler is disposed in the lower side of the front bonnet in place of the suction fan. Therefore, the cooling efficiency of the oil cooler can be improved without using the cooling fan dedicated to the oil cooler. Contributes to downsizing of the oil cooler.
Particularly, as in claim 2, an electric component disposed above the oil cooler is exposed to a flow port formed on a lower side of the front bonnet, and the oil cooler and the electric field are installed in a bonnet frame installed in the front bonnet so as to surround the engine. When the component is supported, the cooling wind exiting the flow port is blown to the electric component by the rotation of the suction fan, so that the electric component is cooled. The temperature rise of the electric component disposed around the engine can be suppressed by the cooling wind from the flow port. It is possible to avoid an adverse effect on the electric component due to the heat of the engine. The bonnet frame can be used to simplify the supporting structure of the oil cooler and the electric component.
According to the invention of claim 3, since the discharge fan is provided separately from the suction fan on the other side of the engine opposite to the suction fan, the effect of introducing the cooling air of the suction fan and the discharge effect of the discharge fan of the discharge fan are matched The cooling efficiency of the engine can be remarkably improved.
According to the fourth aspect of the present invention, the engine is mounted on the engine base attached to the traveling base through the anti-vibration member, and the engine base is provided with a through hole facing the bottom surface of the engine, The cooling air introduced into the engine can be blown to the bottom surface of the engine. Therefore, the engine oil in the engine is actively cooled to suppress the excessive increase of the engine oil temperature, so that the heat balance of the engine can be well maintained.
According to the fifth aspect of the present invention, since the engine is disposed on the engine mount so that the cooling air flows from the through-hole toward the exhaust fan, the engine is arranged to be shifted from the through hole. And the cooling air is blown toward the side by the through-hole diesel. Therefore, it is possible to lower the temperature of the wind itself by mixing the cooling wind of relatively low temperature to the wind around the other side of the engine, thereby greatly improving the thermal environment on the other side of the engine.
Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings when applied to an eight-unit graft type passenger-type transfer unit 1 (hereinafter, simply referred to as a transfer unit 1). In the following description, the left side toward the traveling direction of the traveling base 2 is simply called the left side, and the right side toward the traveling direction is simply called the right side.
(One). Overview of the rice milling period
First, the outline of the herbicide unit 1 will be described with reference to Figs. 1 and 2. Fig. The rehabilitation machine 1 of the embodiment has a traveling vehicle 2 supported by a pair of right and left front wheels 3 as a traveling part and a pair of right and left rear wheels 4 in the same manner. The engine 5 is mounted on the front portion of the traveling base 2 and the power from the engine 5 is transmitted to the rear transmission case 6 to drive the front wheel 3 and the rear wheel 4 Forward and backward travel. Front wheels 3 are steerably attached to a train axle extending left and right from the front axle case 7 while projecting the front axle case 7 in the right and left chambers of the mission case 6. [ The rear axle case 9 is fixed to the rear end side of the tubular frame 8 by projecting the tubular frame 8 behind the transmission case 6 and is extended from the rear axle case 9 to the left and right outward The rear wheel 4 is attached to the rear axle.
As shown in Figs. 1 and 2, a work step (vehicle body cover) 10 for operator occupation is provided on the front side of the traveling base 2 and the upper side of the central portion. A front bonnet 11 is disposed above the front portion of the work step 10 and an engine 5 is provided inside the front bonnet 11. [ The step operation traveling speed change pedal 12 is disposed on the rear side of the front bonnet 11 on the upper surface of the working step 10. [ Although the detailed description is omitted, the bending machine 1 of the embodiment is configured to adjust the transmission power output from the hydraulic CVT of the transmission case 6 by driving the transmission electric motor in accordance with the step amount of the transmission speed change pedal 12 .
A steering handle 14, a running peripheral speed lever 15 and a working lever 16 are provided on a driving operation portion 13 on the rear upper surface side of the front bonnet 11. A steering seat 18 is disposed on the rear side of the front bonnet 11 in the upper surface of the work step 10 through a seat frame 17. On the left and right sides of the front bonnet 11, left and right preliminary seedlings 24 are provided with a work step 10 therebetween.
A link frame (19) is installed upright at the rear end of the traveling base (2). The seedling seedling apparatus 23 is connected to the link frame 19 through a parallel link mechanism 22 composed of a lower link 20 and a top link 21 so as to be able to ascend and descend. The operator is carried on the work step 10 from the elevation step 25 on the side of the work step 10 and drives the seedling type feeding device 23 while moving the inside of the pavement by the driving operation to drive a seedling And performs a food processing (rice planting work). In addition, during the seedling portion work, the seedling mat on the pre-seedling harvesting section 24 is occasionally supplied to the seedling growing section 23 by the operator.
3 and 4, the seedling type feeding device 23 includes a feeding input case 26 through which the power transmitted from the engine 5 via the mission case 6 is fed, A seedling transmission case 27 provided on the rear end side of each food transmission case 27, a seedling seedling harvesting device 29 for harvesting eight seedlings, And float 32 for smoothing float arranged on the lower surface side of each food-borne transmission case 27. The seedling plant 28 is provided with a rotary case 31 having two food tanks 30 for one tank. Two rotary casings 31 are disposed in the food-feeding transmission case 27. The two food tanks 30 cut and hold the seedlings for one week each by one rotation of the rotary case 31 so as to be put into the rice paddies stopped at the float 32. [
The power transmitted from the engine 5 to the transmission case 6 is transmitted not only to the front wheels 3 and rear wheels 4 but also to the food input case 26 of the seedling- do. In this case, the power from the transmission case 6 to the seedling type device 23 is once transmitted to a weekly transmission case (not shown) provided on the upper right side of the rear axle case 9, 26). And the respective seedling-implanting devices 28 and the seedling stand 29 are driven by the transmitted power. Although not described in detail, the intermittent transmission case interrupts the transmission of the power to the seedling type feed device 23 and the intermittent transmission mechanism that switches the feed of the various types of feed during the weekly transmission case, for example, sparsely planted, PTO clutch is built in.
Further, the side marker 33 is provided on the left and right outside of the seedling-type seedling unit 23. [ The side marker 33 has a marking marker shaft 34 for line drawing and a marker arm 35 for rotatably supporting the marker shaft 34 in a rotatable manner. The proximal end side of each marker arm 35 is pivotally supported on the left and right outer sides of the seedling type device 23 so as to be rotatable in the left and right direction. The side marker 33 has a working posture in which the trajectory serving as a reference in the next step is landed on the rice paddle on the basis of the operation of the working lever 16 in the driving operation portion 13, And is rotatable in a non-working posture separated from the rice paddle.
(2). Engine support structure and engine surround structure
Next, the supporting structure of the engine 5 with respect to the traveling base 2 and the peripheral structure of the engine 5 will be described with reference to Figs. 3 to 12. Fig. As shown in Figs. 3 and 4, the traveling base 2 is provided with a pair of left and right base frames 50 extending back and forth. Each base frame 50 is divided into a front sub-frame 51 and a rear sub-frame 52 in two. The rear end portion of the front sub-frame 51 and the front end portion of the rear sub-frame 52 are welded and fixed to the intermediate connection frame 53, which is laterally long in the left and right direction. A front end portion of a pair of left and right front sub-frames 51 is welded and fixed to the front frame 54. The rear end side of the pair of left and right rear frames 52 is welded and fixed to the rear frame 55. The front frame 54, the left and right front side frames 51, and the intermediate connection frame 53 are formed in a rectangular frame shape when viewed in plan view. Likewise, the intermediate connecting frame 53, the left and right rear frames 52 and the rear frame 55 are also formed as rectangular frames when viewed from the plane.
As shown in Figs. 5 to 7, front portions of the left and right front sub-frames 51 are connected by two front and rear base frames 56, respectively. Each of the base frames 56 is formed in a U-shape so that the middle portion thereof is located lower than both the left and right front sub-frames 51. The left and right end portions of the base frames 56 are welded and fixed to the corresponding front sub-frames 51, respectively. The engine 5 is mounted on both the front and rear base frames 56 via the substantially planar engine mount 57 and the plurality of anti-vibration rubber members 58 as anti-vibration members, and the anti-vibration supports are supported. The base frame 56 on the front side is connected to the front frame 54 through a front frame 59 welded and fixed thereto. The base frame 56 on the rear side is connected to the front portion of the mission case 6 through a rear bracket 60. The engine 5 of the embodiment is a four-stroke V-type two-cylinder gasoline engine.
4, rear portions of the left and right front sub-frames 51 are connected to the front axle case 7 protruded to the left and right sides of the transmission case 6, respectively. The left and right ends of the U-shaped frame 61 extending rearwardly and downwardly when viewed from the side are welded to the center of the intermediate connecting frame 53. An intermediate portion of the U-shaped frame 61 is connected to the middle portion of the tubular frame 8 connecting the transmission case 6 and the rear axle case 9 (see FIGS. 3 and 4). In the middle portion of the rear frame 55, the upper ends of the two vertical frames 62 are welded and fixed. A middle portion of the rear axle supporting frame 63, which is laterally longer in the left and right directions, is fixedly welded to the lower ends of the right and left vertical frames 62. Both left and right ends of the rear axle supporting case 63 are connected to the rear axle case 9. A muffler 65 for reducing the exhaust sound of the engine 5 is disposed below the step support 64 protruding outwardly from the left front side frame 51.
4 to 6, a power steering unit 66 is provided on the front portion of the mission case 6 disposed behind the engine 5. [ A handle shaft (not shown) is rotatably disposed inside the handle post 67 erected on the upper surface of the power steering unit 66. A steering handle 14 is fixed to an upper end side of the handle shaft. A steering output shaft (not shown) protrudes downward on the lower side of the power steering unit 66. The steering output shaft is connected to a steering gear 68 (see Fig. 4) for steering the front right and left wheels 6, respectively.
The engine 5 of the embodiment is disposed on the middle portion of the front and rear base frames 56 toward the left and right in the output shaft 70 (crankshaft). The left and right widths of the engine 5 and the engine mount 57 are smaller than the inner diameters between the left and right front subframes 51 and the lower side of the engine 5 and the engine mount 57 are provided on both the front and rear base frames 56, And is exposed below the left and right front sub-frames 51 in a state in which they are disposed on the middle portion of the front sub-frame 51. In this case, the output shaft 70 (axial line) of the engine 5 overlaps with both the left and right front sub-frames 51 as viewed from the side.
The output shaft (70) of the engine (5) protrudes outwardly from both left and right sides of the engine (5). A suction fan 71 for engine air cooling is provided on one of the projecting end portions of the output shaft 70 (right end projecting end portion in the embodiment) (see Fig. 5). The suction fan (71) is configured to rotate integrally with the output shaft (70). The suction fan 71 is covered with a fan cover 72. The cooling wind introduction port 73 formed at the center of the fan cover 72 is provided with a dust-proofing network 74. The engine 5 itself is forcibly cooled by the cooling wind introduced from the cooling wind inlet 73 by the rotation of the suction fan 71. [
The engine 5 is moved from one side of the front bonnet 11 (also referred to as engine room) to the other side (left side from the right side in the embodiment) by the rotation of the suction fan 71 And cooling air (outside air) that cools down flows. In other words, a flow port 75 for allowing cooling wind to flow into and out of the front bonnet 11 is formed on the lower side of the left and right sides of the front bonnet 11. In the embodiment, a plurality of slit-shaped through-holes are formed on both right and left side surfaces of the front bonnet 11 so as to be arranged vertically at appropriate intervals. These through hole groups are formed in the flow port 75.
Therefore, when the suction fan 71 rotates, the air in the front bonnet 11 flows from right to left, the pressure in the front bonnet 11 drops, and a difference occurs in the pressure inside and outside the front bonnet 11. The cooling wind is introduced from below the flow port 75 on the right side, the front side frame 51 on the right side and the work step 10, and the engine 5 and the like are air-cooled by the introduced cooling wind. The cooling wind (air flow) circulated in the front bonnet 11 and warmed is discharged from the front bonnet 11 through the left flow port 75, the left front frame 51 and the work step 10 (See FIG. 7).
On the upper surface of the engine 5, a cleaner case 76 for accommodating an air cleaner (not shown) is vertically disposed at an appropriate interval. The gap formed between the cleaner case 76 and the engine 5 is formed in an upper air passage 77 (see FIG. 7) through which cooling wind introduced through the rotation of the suction fan 71 passes. Although not shown, a communication hole for communicating the inside and the outside of the cleaner case 76 is formed in the vicinity of the suction fan 71 on the lower surface side of the cleaner case 76. The cooling air passing through the upper ventilation path 77 is introduced into the cleaner case 76 via the communication hole by the rotation of the suction fan 71. [ Further, the cleaner case 76 is connected to the intake machine of the engine 5. The cooling air filtered by the air cleaner in the cleaner case 76 is sent to the intake machine (carburetor or the like) of the engine 5. [ The cool air is introduced into the cleaner case 76 by the rotation of the suction fan 71 so that the temperature rise in the cleaner case 76 is suppressed and cool air is supplied to the intake machine (carburetor or the like) As a result, the driving efficiency of the engine 5 can be improved.
A first oil cooler 78 for cooling engine oil is provided on the rear side of the engine 5. A second oil cooler 79 for cooling engine oil, which is opposed to the cooling air inlet 73, is disposed outside the fan cover 72. The second oil cooler 79 is connected to the first oil cooler 78 and serves to supplement the cooling capacity of the first oil cooler 78. The cooling wind introduced into the front bonnet 11 by the rotation of the suction fan 71 is blown to the first and second oil coolers 78 and 79 and the first and second oil coolers 78 and 79 Oil) is forcibly cooled. The second oil cooler 79 of the embodiment is located between the right front sub-frame 51 and the right side surface (the fan cover 72 side) of the engine 5, and the right front sub- As shown in Fig. In other words, the second oil cooler 79 is disposed below the front bonnet 11 which covers the engine 5 from above, so as to be opposed to the suction fan 71.
5 to 7, a bonnet frame 80 on an approximately box frame surrounding the engine 5 is connected to the front frame 54 and the handle post 67 in the front bonnet 11. An attachment bracket 82 is provided on the branch frame 81 welded and fixed to one side portion (right side portion in the embodiment) of the bonnet frame 80 so as to extend vertically. The second oil cooler 79 is connected to the lower side of the attachment bracket 82 and faces the cooling air inlet 73 of the fan cover 72. Therefore, the second oil cooler 79 is cooled earlier than the engine 5 by the cooling wind introduced from below the front sub-frame 51 and the work step 10 on the right side mainly by the rotation of the suction fan 71 do. Therefore, the cooling efficiency of the second oil cooler 79 can be improved without using the cooling fan dedicated to the second oil cooler 79, contributing to the downsizing of the second oil cooler 79.
On the upper side of the attachment bracket 82, an electric component 83 such as a controller relating to the engine 5 is attached. The electric component 83 faces the inner side of the front bonnet 11 at the right side flow port 75. The cooling wind that exits the right flow port 75 by the rotation of the suction fan 71 is blown to the electric component 83 and the electric component 83 is cooled. The temperature rise of the electric component 83 disposed around the engine 5 can be suppressed by the cooling wind from the flow port 75 on the right side. The adverse effect on the electric component 83 due to the heat of the engine 5 can be avoided. The inlet side of the upper ventilation path 77 between the cleaner case 76 and the engine 5 is located on the opposite side of the right side flow passage 75 with the electric component 83 therebetween.
As shown in Figs. 6 and 7, the outlet side of the upper air passage 77 is open at the upper side of the other side (the left side in the embodiment) of the engine 5 opposite to the suction fan 71. A ventilation duct 84 is attached to the upper side of the left side surface of the engine 5 so as to surround the outlet side of the upper ventilation path 77 when viewed from the side. The vent duct 84 is located at a higher position than the left front side frame 51 and faces the left side flow port 75 from the inside of the front bonnet 11. And the ventilation duct 84 forms an upper ventilating passage 85 of the engine 5. That is, the warmed air that has passed through the upper ventilation path 77 to take the heat of the engine 5 and is warmed is discharged through the ventilation duct 84 from the left flow port 75 to the front bonnet 11. It is possible to smoothly discharge the warmed airflow from the left side flow port 75 by preventing the warmed airflow from staying inside the front bonnet 11 due to the presence of the ventilation ducts 84, thereby improving the discharge efficiency of the airflow.
As shown in Fig. 7, the warmed air taken by the heat of the engine 5 is discharged out of the front bonnet 11 via the upper air path 85, and the left front frame 51 and the working steps 10 ), As shown in Fig. That is, the lower side of the left front side frame 51 and the working step 10 is formed in the lower airflow path 86 of the engine 5.
An exhaust pipe 87 communicating with the exhaust system of the engine is disposed on the other side (the left side in the embodiment) of the engine 5 opposite to the suction fan 71. The exhaust pipe 87 traverses between the ventilation duct 84 and the other projecting end of the output shaft 70 (in the embodiment, the left end of the projecting end) Like shape extending in the longitudinal direction. The exhaust pipe 87 of the embodiment includes a horizontal pipe portion 87a extending transversely between the ventilation duct 84 and the output shaft 70, a vertical pipe portion 87b extending downward from the front side of the output shaft 70, And a connecting pipe portion 87c extending from the lower end side of the vertical pipe portion 87b toward the muffler 65. [ The base end side of the horizontal pipe portion 87a is connected to one of the cylinders of the engine 5. A portion of the horizontal pipe portion 87a branched from a portion near the vertical pipe portion 87b is connected to the other cylinder of the engine 5. [ Therefore, the exhaust gas from both cylinders joins in front of the vertical pipe portion 87b in the horizontal pipe portion 87a. And the tip end side of the connecting tube portion 87c is connected to the exhaust inlet side of the muffler 65. [
A shielding cover 88 surrounding the transverse pipe portion 87a and the vertical pipe portion 87b of the exhaust pipe 87 is provided on the left side of the engine 5. [ The shielding cover 88 of the embodiment has a transverse cover body 89 covering the transverse tube portion 87a and a longitudinal cover body 90 covering the longitudinal tube portion 87b. The transverse cover body 89 is made of a metal plate having an upper face plate, a rear face plate, and a left face plate. The longitudinal cover 90 is made of a metal plate having a top plate, a bottom plate, left and right side plates, and a front plate. That is, the transverse cover body 89 and the longitudinal cover body 90 are formed in a substantially box-like shape with the discharge fan 91 side provided at the other end of the output shaft 70 have. The transverse cover member 89 and the longitudinal cover member 90 are arranged in a substantially L shape as viewed from the side in terms of surrounding the transverse pipe portion 87a and the longitudinal pipe portion 87b of the exhaust pipe 87. [ The shielding cover 88 surrounds the horizontal tubular portion 87a and the vertical tubular portion 87b of the exhaust pipe 87 to prevent the heat generated from the exhaust pipe 87 from diffusing in the front bonnet 11. [ It is needless to say that the ventilation duct 84 and the shielding cover 88 of the embodiment are located between the left front frame 51 and the left side surface of the engine 5 and are contained in the front bonnet 11 Reference).
6 and 9, the other side of the output shaft 70 is provided on the inner side of the left side surface of the engine 5 (partitioned by the transverse cover body 89 and the longitudinal cover body 90) (The left side end of the projection in the embodiment) protrudes. At the left end of the output shaft 70, a discharge fan 91 is provided separately from the suction fan 71. The discharge fan 91 is configured to rotate integrally with the output shaft 70 like the suction fan 71. The peripheral exhaust is introduced by the rotation of the exhaust fan 91 and is discharged from the front bonnet 11 mainly through the lower air discharge path 86 (the left front frame 51 and the lower portion of the work step 10) . Therefore, the cooling fan is blown to the engine 5 by the rotation of the suction fan 71 on the right side of the engine 5 to forcibly cool the engine 5, The cooling air introduction effect of the suction fan 71 and the ventilation exhaust effect of the exhaust fan 91 are matched to each other so that the engine 5 Can be remarkably improved.
As described above, since the transverse cover body 89 and the longitudinal cover body 90 are formed in a substantially box shape with the discharge fan 91 side opened, the heat generated from the exhaust pipe 87 is transferred to the front bonnet 11 And is actively discharged out of the front bonnet 11 via the lower air discharge path 86 by the rotation of the discharge fan 91. [ Therefore, the heat environment on the left side of the engine 5 having the exhaust pipe 87, and further, the heat environment in the front bonnet 11 can be improved.
As shown in Figs. 6, 8, 9, and 11, a plurality of output pulleys 92 and 93 for transmitting torque as well as a discharge fan 91 are provided in the left end of the output shaft 70 ). The output pulleys 92 and 93 are configured to rotate together with the discharge fan 91 by the rotation of the output shaft 70. Each of the output pulleys 92 and 93 is disposed in the axial direction of the output shaft 70 with the discharge fan 91 interposed therebetween. The output pulley 92 closer to the engine 5 is a first output pulley 92 for transmitting torque to a generator 94 (to be described later in detail) to be described later, and an output pulley 93 farther from the engine And a second output pulley 93 for transmitting torque to the transmission input shaft 97 (details will be described later) protruding leftward outward from the transmission case 6.
Here, the generator 94 is disposed on the opposite side (rear side in the embodiment) of the exhaust pipe 87 with the left proximal end portion of the output shaft 70 interposed therebetween. The generator 94 is attached to the left side of the engine 5 on the left rear side of the left end of the output shaft 70 or on the fixing bracket 95 bolted to the lower side of the transverse cover body 89. Although not shown, a space is provided between the left side of the engine 5 and the generator 94 at right and left intervals. A view input pulley 94a is provided on the side of the generator 94 opposed to the left side of the engine 5. A transmission belt 96 is wound around the first output pulley 92 on the output shaft 70 side and the view input pulley 94a on the generator 94 side. The rotational force is transmitted from the engine 5 to the generator 94 via the pulley 92 and the belt 96 electric motor to generate the electric power of the generator 94. [ The generator 94 is attached to the left side surface of the engine 5 through the fixing bracket 95 and therefore included in the same vibration system as the engine 5. [ Therefore, the load applied to the generator 94 itself can be reduced, and the risk of deformation or breakage of the generator 94 can be suppressed.
In addition, a mission input pulley 98 is provided on the mission input shaft 97 projecting leftward outward from the mission case 6. A transmission belt 99 is wound around the second output pulley 93 on the output shaft 70 side and the mission input pulley 98 on the transmission case 6 side. The rotational force is transmitted from the engine 5 to the transmission case 6 via the pulleys 93 and 98 and the belt 99 electrical system. A mission cooling fan 100 for air cooling of the mission case 6 is provided on the left side of the mission output shaft 97 from the mission input pulley 98. The mission cooling fan 100 is configured to rotate together with the mission input pulley 98 by the rotational force transmitted through the pulleys 93 and 98 and the belt 99 electrical system.
6 and 9, a discharge fan 91, first and second output pulleys 92 and 93, a generator 94, and a transmission fan 92 are disposed inside the shielding cover 88 on the left side of the engine 5, Belts 96 and 99 are disposed. The pulleys 92 and 93 and the belts 96 and 99 and the generator 94 are compactly arranged inside the shielding cover 88 on the left side of the engine 5, The heat around the left side surface of the engine 5 can be smoothly discharged through the lower air path 86 by the rotation. The pulleys 92 and 93 and the belts 96 and 99 can be cooled by blowing the airflow to the electric power generators 94 and the belts 96 and 99, It is possible to suppress the deterioration of heat of the heat-dissipating member, and to improve their durability.
As can be seen from Fig. 11, the outer diameter of the discharge fan 91 is larger than that of each of the output pulleys 92 and 93. Therefore, there is little possibility that the presence of the output pulleys 92 and 93 will be disturbed when the exhaust fan 91 discharges the exhaust air to the lower exhaust path 86. When the exhaust fan 91 rotates, It is possible to maintain a good exhaust efficiency of the exhaust gas. Further, each of the output pulleys 92, 93 has a smaller diameter as it is closer to the engine 5. Therefore, when the heat of the left side of the engine 5 is taken by the rotation of the discharge fan 91, the influence of the presence of the first output pulley 92 closer to the engine 5 can be reduced. The output pulleys 92 and 93 and the discharge fan 91 are arranged in a compact manner on the left side end of the output shaft 70 while suppressing thermal deterioration of the pulleys 92 and 93 and the belts 96 and 99 And the lateral width of the engine 5, and thus the front bonnet 11 covering the front bonnet 11, can be prevented from expanding.
A tension applying member 101 for tensioning the transfer belt 99 is provided between the second output pulley 93 on the output shaft 70 side and the mission output pulley 98 as shown in Figs. 3, 6, and 11 Respectively. The tension imparting member 101 is provided with a tension pulley 102 that contacts the transmission belt 99 from below. The tension pulley 102 is pivotally supported on the free end side of a tension arm 103 which is vertically rotatably connected to the left side of the engine mount 57. The tension arm 103 is pulled upward by the biasing spring 104 to press the tension pulley 102 against the transmission belt 99 at all times from below. The biasing spring 104 is mounted between a rocking arm 106 erected on the boss 105 on the base end side of the tension arm 103 and a support plate 107 protruding from the left side of the engine mount 57.
When the tension imparting member 101 is provided on the engine mount 57 on which the engine 5 is mounted, the tension imparting member 101 is included in the same vibration system as the engine 5, The load applied can be reduced. As a result, it is possible to suppress the risk of deformation or breakage of the tension imparting member (101). In addition, there is an advantage that the vibration of the tension imparting member 101 follows the vibration of the engine 5, so that it is easy to maintain the transmission belt 99 in a state in which proper tension is applied. In the embodiment, not only the tension imparting member 101 but also the generator 94 are disposed between the second output pulley 93 and the mission output pulley 98 together with the engine 5 and the transmission case 6 arranged forward and backward So that the space between the engine 5 and the mission case 6 is effectively utilized.
The engine 5 of the embodiment is bolted to the engine frame 57 supported by the front and rear base frames 56 via a plurality of anti-vibration rubber members 58. As shown in Figs. 8, 9, and 12, a through hole 108 is formed in the engine mount 57 so as to face the bottom surface of the engine 5. The rib groove 109 formed in the bottom surface of the engine 5 faces the through hole 108 of the engine mount 57. [ In this case, the engine 5 is disposed on the engine mount 57 so as to allow the cooling air to flow from the through hole 108 toward the exhaust fan 91 on the left side of the engine from the through hole 108 (to the right). In other words, a part of the through hole 108 is vertically opened without covering the entire through hole 108 of the engine mount 57 on the bottom surface of the engine 5. [ The first output pulley 92 and the transmission belt 96 on the left side of the engine 5 are visible in part of the through hole 108 when the through hole 108 is viewed from the lower side of the engine mount 57 do.
When the through hole 108 is formed in the engine mount 57 so as to face the bottom surface of the engine 5 as described above, the cooling air introduced by the rotation of the suction fan 71 is supplied to the bottom surface of the engine 5 The engine oil in the engine 5 can be actively cooled to suppress an excessive increase in the engine oil temperature. The cooling efficiency of the first and second oil coolers 78 and 79 can be effectively matched with the cooling efficiency of the engine oil, and the heat balance of the engine 5 can be maintained satisfactorily. Since the engine 5 is arranged on the engine mount 57 so as to flow the cooling air from the through hole 108 toward the exhaust fan 91 as the engine 5 is displaced from the through hole 108, It is possible to send the cooling air through the through hole 108 from the bottom surface side of the engine 5 to the left side surface side. Therefore, it is possible to reduce the temperature of the airflow itself by mixing the cooling wind of relatively low temperature around the left side surface of the engine 5, and the thermal environment on the left side of the engine 5 can be greatly improved.
(3). theorem
The engine 5 mounted on the traveling base 2 and the transmission case 6 for transmitting the power of the engine 5 to the traveling sections 3 and 4 of the traveling base 2 And a seedling feeding device (23) mounted on the traveling base (2), wherein a suction fan (71) for cooling the engine is provided on one side of the engine (5) An exhaust pipe 87 (87b) communicating with the exhaust system of the engine 5 is provided on the other side of the engine 5 opposite to the suction fan 71, with an output shaft 70 protruding from the other side interposed therebetween. The exhaust pipe 87 (87b) is divided into the exhaust pipe 87 (87b) and the generator 94 on both sides with the output shaft 70 interposed therebetween, because the generator 94 is disposed on the other side. (87 (87b)) on the other side of the engine (5) while suppressing the adverse effect of the heat of the exhaust pipes (87a, 87b) on the generator (94) A group generator 94 can be disposed compactly organized.
An output pulley 93 fixed to the output shaft 70; a transmission belt 99 wound around a mission input pulley 98 fixed to a transmission input shaft 97 of the transmission case 6; The tension imparting member 101 and the generator 94 are positioned between the output pulley 93 and the mission input pulley 98 so that the tension imparting member 101 The spaces between the engine 5 and the mission case 6 are effectively used to reduce the size of the arrangement of the pulleys 93 and 98 and the belt 99 of the transmission case 6 .
The engine 5 is mounted on the engine base 57 attached to the traveling base 2 through the anti-vibration member 58, and the tension imparting member 101 is attached to the engine base 57 And the generator 94 is attached to the fixing bracket 95 fastened to the other side of the engine 5 so that the tension imparting member 101 and the generator 94 are connected to the engine 5, As shown in FIG. Therefore, the load applied to the tension imparting member 101 and the generator 94 itself can be reduced, and the risk of deformation or breakage of the tension imparting member 101 and the generator 94 can be suppressed.
The engine 5 mounted on the traveling base 2 and the transmission case 6 for transmitting the power of the engine 5 to the traveling sections 3 and 4 of the traveling base 2 And a seedling feeding device (23) mounted on the traveling base (2), wherein a suction fan (71) for cooling the engine is provided on one side of the engine (5) The engine 5 is disposed so as to protrude downward from both the base frames 50 between a pair of left and right base frames 50 constituting the traveling base 2, A ventilation duct 84 for passing the cooling wind from the suction fan 71 is disposed on the other side of the other side of the fan 71 opposite to the base frame 50. The ventilation duct 84 An upper air path 85 of the engine 5 is formed and a lower portion of the gas frame 50 on the other side of the engine 5 And the lower ventilation passage 86 of the engine 5, it is possible to prevent the warmed ventilation from being diffused in the engine room by depriving the engine 5 of the heat due to the presence of the ventilation duct 84 . In addition, it is possible to prevent the exhaust air from staying in the engine room and stay out smoothly from the upper air passage 85, thereby improving the discharge efficiency of the exhaust air. In addition, the exhaust passage of the engine 5 can be divided into the upper and lower exhaust passages 85 and 86, so that the exhaust air can be efficiently discharged out of the engine room, Can be kept in a good state.
A cleaner case 76 for accommodating the air cleaner is disposed on the upper surface of the engine 5 at an appropriate interval in the vertical direction and an upper ventilation path 77 between the cleaner case 76 and the engine 5 The cooling fan can be cooled around the upper surface of the engine 5 by introducing the cooling air around the upper surface of the engine 5 by the rotation of the suction fan 71 because the cooling fan communicates with the ventilation duct 84. Then, the heat around the upper surface of the engine 5 is taken away, and warmed air can be smoothly discharged through the ventilation duct 84. Therefore, the cooling efficiency of the engine 5 can be improved.
The output shaft 70 protruding from the other side of the engine 5 overlaps the base frame 50 on the other side of the engine 5 when viewed from the side, An exhaust pipe 87 communicating with the exhaust system of the engine is formed in an L shape extending in the longitudinal direction from one side across the output shaft 70 after traversing between the ventilation duct 84 and the output shaft 70 Since the shield cover 88 surrounding the exhaust pipe 87 is provided on the other side surface of the engine 5, heat generated from the exhaust pipe 87 due to the presence of the shield cover 88 is transmitted to the engine 5, It is possible to suppress diffusion in the room.
The engine 5 mounted on the traveling base 2 and the transmission case 6 for transmitting the power of the engine 5 to the traveling sections 3 and 4 of the traveling base 2 And a seedling feeding device (23) mounted on the traveling base (2), wherein a suction fan (71) for cooling the engine is provided on one side of the engine (5) Since the exhaust fan 91 is provided on the other side of the engine 5 opposite to the suction fan 71 separately from the suction fan 71, Not only the engine 5 is forcedly cooled by blowing the cooling wind to the engine 5 by the engine 71, but also by rotating the exhaust fan 91 on the other side of the engine 5, And the warmed air is discharged from the engine room. Therefore, the cooling air introduction effect of the suction fan 71 and the exhaust air discharge effect of the exhaust fan 91 are matched with each other, so that the cooling efficiency of the engine 5 can be remarkably improved.
The output shaft 70 of the engine 5 is provided with output pulleys 92 and 93 for transmitting torque as well as the discharge fan 91. The discharge fan 91 and the output pulleys 92 and 93 93 are configured to rotate together by the rotation of the output shaft 70 so that the output pulleys 92 and 93 are rotated by blowing wind to the output pulleys 92 and 93 using the rotation of the discharge fan 91, Can be cooled. Therefore, the exhaust fan 91 and the output pulleys 92 and 93 can be compactly arranged, and thermal degradation of the output pulleys 92 and 93 can be suppressed, thereby improving their durability. The arrangement of the discharge fan 91 and the output pulleys 92 and 93 can be made compact and the lateral width of the engine 5 and hence the engine room can be prevented from increasing.
Since the outer diameter of the discharge fan 91 is larger than the outer diameter of the output pulleys 92 and 93, the presence of the output pulleys 92 and 93 when discharging the airflow by the rotation of the discharge fan 91 So that the exhaust efficiency of the exhaust air due to the rotation of the exhaust fan 91 can be kept good.
Since the plurality of output pulleys 92 and 93 are formed to have a smaller diameter as the output pulleys 92 and 93 are closer to the engine 5, It is possible to reduce the influence of the presence of the output pulley 92 closer to the engine 5 when the heat on the other side of the engine 5 is taken away.
The engine 5 mounted on the traveling base 2 and the transmission case 6 for transmitting the power of the engine 5 to the traveling sections 3 and 4 of the traveling base 2 And a seedling feeding device (23) mounted on the traveling base (2), wherein a suction fan (71) for cooling the engine is provided on one side of the engine (5) The engine 5 is mounted on an engine mount 57 attached to the traveling base 2 via a vibration preventing member 58. The engine mount 57 is provided with a The cooling air introduced by the rotation of the suction fan 71 can be blown to the bottom surface of the engine 5 because the through holes 108 are formed. Therefore, the engine oil in the engine 5 is actively cooled to suppress the excessive increase of the engine oil temperature, and the heat balance of the engine 5 can be well maintained.
In addition, a discharge fan is provided separately from the suction fan on the other side of the engine 5 opposite to the suction fan 71, and the cooling fan is provided so as to flow from the through- The cooling wind is transferred from the bottom surface side of the engine 5 to the other side surface side through the through hole 108 by the rotation of the exhaust fan 91 because the engine is arranged to be shifted from the through hole . Therefore, it is possible to lower the temperature of the wind itself by mixing the cooling wind of relatively low temperature to the wind around the other side of the engine (5), thereby greatly improving the thermal environment on the other side of the engine (5).
The engine 5 and the engine mount 57 are disposed so as to protrude downward from both the base frames 50 between a pair of left and right base frames 50 constituting the traveling base 2 Therefore, the cooling wind can be smoothly introduced from the bottom surface side of the engine 5.
The engine 5 mounted on the traveling base 2 and the transmission case 6 for transmitting the power of the engine 5 to the traveling sections 3 and 4 of the traveling base 2 And a seedling feeding device (23) mounted on the traveling base (2), wherein a suction fan (71) for cooling the engine is provided on one side of the engine (5) The engine 5 is disposed so as to protrude downward from both the base frames 50 between a pair of left and right base frames 50 constituting the traveling base 2, Since the oil cooler 79 is arranged so as to face the suction fan 71 below the covering front bonnet 11, the oil cooler 79 is rotated mainly by the rotation of the suction fan 71, The cooling air introduced from below the engine 5 is cooled. Therefore, the cooling efficiency of the oil cooler 79 can be improved without using a cooling fan dedicated to the oil cooler 79. Thereby contributing to the downsizing of the oil cooler 79.
The front bonnet 11 is provided with a flow port 75 formed on the lower side of the front bonnet 11 so as to face the electric component 83 disposed above the oil cooler 79 and surround the engine 5. [ The oil cooler 79 and the electric component 83 are supported by the bonnet frame 80 provided in the housing 11 so that the cooling wind exiting the flow port 75 by the rotation of the suction fan 71 The electric component 83 is blown to the electric component 83 so that the electric component 83 is cooled. The temperature rise of the electric component 83 disposed around the engine 5 can be suppressed by the cooling wind from the flow port 75. [ It is possible to avoid an adverse effect on the electric component 83 due to the heat of the engine 5. [ The bonnet frame 80 can be used to simplify the supporting structure of the oil cooler 79 and the electric component 83.
The engine 5 mounted on the traveling base 2 and the transmission case 6 for transmitting the power of the engine 5 to the traveling sections 3 and 4 of the traveling base 2 And a seedling feeding device (23) mounted on the traveling base (2), wherein the engine (5) is provided with a suction fan (71) for air cooling on one side of the engine The suction fan 71 is mounted on the other side of the engine 5 on the opposite side of the suction fan 71 from the suction fan 71, Since the shielding cover 88 surrounding the exhaust fan 91 is provided on the other side of the engine 5, the cooling air introduced into the suction fan 71 And the ventilation discharge effect of the discharge fan 91 are matched, the cooling efficiency of the engine 5 can be remarkably improved, It is possible to prevent the heat around the left side surface of the engine 5 from being diffused in the engine room.
The output shaft 70 of the engine 5 is provided with output pulleys 92 and 93 for transmitting torque as well as the exhaust fan 91. The shield cover 88 93 and the belts 96, 99 are disposed on the inside of the pulleys 92, 93 and the belts 96, 99, respectively, since the discharge fan 91, the generator 94, the pulleys 92, The heat around the left side surface of the engine 5 can be smoothly discharged by rotating the discharge fan 91 while arranging the cooling system or the generator 94 compactly. Since the discharge fan 91 can blow the exhaust air to the pulleys 92 and 93 and the belts 96 and 99 and the generator 94 to cool the pulleys 92 and 93 And the thermal degradation of the belts 96 and 99 and the generator 94 can be suppressed and the durability thereof can be improved.
(4). Etc
The present invention is not limited to the above-described embodiment, but may be embodied in various forms. The configuration of each unit is not limited to the illustrated embodiment, and various modifications can be made without departing from the gist of the present invention.
