JP5600020B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle, and more particularly to a technique of a radiator cover that covers a radiator of the work vehicle.

  2. Description of the Related Art Conventionally, a technique for covering a radiator with a radiator cover in a work vehicle is known. In the technique described in Patent Document 1, the radiator is covered from behind in the bonnet together with a radiator cover that is disposed behind the radiator together with a radiator fan that sucks air toward the radiator. The radiator and the radiator cover are attached to the body frame via a radiator bracket made of a frame formed by combining plate-like members in the vertical and horizontal directions. An engine is disposed behind the radiator cover with the crankshaft directed in the front-rear direction, and an air cleaner is disposed above the engine. With such a configuration, the air sucked into the bonnet from the outside by the rotation of the radiator fan cools the radiator and is guided rearward by the radiator cover to cool the engine. And the air after cooling the engine is sucked into the engine by the air cleaner.

JP 2008-168688 A

  In the technique described in Patent Document 1, the air sucked into the air cleaner is the air sucked into the bonnet from the outside by the rotation drive of the radiator fan, and the radiator and the engine are cooled. The later warmed air. As the temperature of the air rises, the volume of the air increases and the oxygen concentration decreases, so if the warmed air is sucked into the engine, the combustion efficiency of the engine decreases or incomplete combustion occurs. There was a case. In addition, when an intake pipe is provided in the air cleaner in order to take in air outside the bonnet, an opening for projecting an intake port of the intake pipe to the outside of the bonnet is provided in the bonnet. It is necessary to provide a fixing member for fixing the pipe. Therefore, the bonnet and the inside thereof have a complicated configuration, and as a result, the manufacturing cost may increase.

  Therefore, an object of the present invention is to provide a work vehicle that has a simple configuration and can introduce the outside air before being heated by the heat from the radiator and the engine inside the bonnet to the air cleaner of the engine.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

In claim 1, the engine disposed in a state in which the crankshaft is transverse to the traveling direction of the aircraft, a radiator disposed on one lateral side of the engine, a radiator cover that covers the radiator, A cooling fan that is disposed between the engine and the radiator and is driven to rotate by the engine, covers the engine, the radiator cover that houses the radiator, and the cooling fan, and extends laterally with the radiator. In a work vehicle including a bonnet that has a ventilation opening in an opposing portion and is inclined front to rear and rear in a side view, the radiator cover includes a first opening that opens toward the ventilation opening side of the bonnet. , organic and a second opening that opens toward the engine side, and a bulging portion that bulges upward after the radiator By extending the bulging part, the upper part of the radiator cover is formed so that the front part is low and the rear part is higher than the bulging part, and the upper inner peripheral surface of the bonnet is inclined to the front low and the rear height. The opening of the intake pipe that extends from the air cleaner of the engine is provided as an opening (58) of the intake pipe of the bulge. The first opening is supported by being inserted through the first opening.

  According to a second aspect of the present invention, the radiator cover is configured integrally with a shroud surrounding the cooling fan.

  According to a third aspect of the present invention, a seal member that seals between the bonnet and the radiator cover is provided at the outer peripheral end of the radiator cover on the side close to the bonnet.

  According to a fourth aspect of the present invention, the radiator projects a water supply portion upward from an upper portion of the radiator cover, and an extended end portion of a water supply pipe extending from a reserve tank serves as a bulging portion of the radiator cover in the water supply portion. And connect to the opposite side.

  As effects of the present invention, the following effects can be obtained.

In claim 1, when the cooling fan is rotationally driven by the engine, air is sucked into the radiator cover from the outside through the vent opening of the bonnet and the first opening of the radiator cover, and passes through the radiator. The air flows to the engine side through the second opening and is introduced into the air cleaner through the intake pipe before passing through the radiator.
Therefore, the air before being heated by the heat from the radiator and the engine inside the hood can be introduced into the engine air cleaner with a simple configuration using the radiator cover and the intake pipe.
Further, the radiator cover bulges the bulging portion along the inner peripheral surface of the bonnet in a direction perpendicular to the axial direction of the crankshaft, and the entire right opening including the bulging portion. The (first opening) side can be brought into close contact with the inner peripheral surface of the bonnet having the front, rear and rear heights.

  In claim 2, it is not necessary to provide the shroud as a separate member from the radiator cover. Therefore, the number of members can be reduced, and the manufacturing cost can be reduced.

  Since the space between the bonnet and the radiator cover is sealed by the sealing member, the cooling effect of the radiator can be enhanced. In addition, the cooling effect of the engine can be enhanced.

According to the fourth aspect of the present invention, the water supply pipe for connecting to the reserve tank can be connected to the radiator without interfering with the radiator cover.
Therefore, it is not necessary to cut out or design the bulging part to be small, so that the bulging part can be configured with an optimal shape and size.

The side view which shows the whole rice transplanter structure concerning one Embodiment of this invention. Similarly, the top view which shows the whole structure. Similarly, the front perspective view which shows a bonnet. Similarly, the front perspective view which shows the equipment inside a bonnet. Similarly, the back perspective view which shows the equipment inside a bonnet. Similarly, the front perspective view which shows a radiator and a radiator cover. Similarly, the top view which shows a radiator cover and a cooling fan. Similarly, the side view which shows a radiator cover. Similarly, side sectional drawing which shows the outline of the attachment structure of a bonnet and a radiator cover.

  First, the whole structure of the rice transplanter 1 which concerns on one Embodiment of this invention is demonstrated using FIG. 1 and FIG. In this embodiment, the rice transplanter 1 is an eight-planted rice transplanter, but is not particularly limited, and may be, for example, a six-row or ten-row planter.

  As shown in FIG. 1, the rice transplanter 1 includes a traveling unit 10 and a planting unit 40, and is configured so that seedlings can be planted in a field by the planting unit 40 while traveling by the traveling unit 10. The The planting part 40 is arrange | positioned at the back of the traveling part 10, and is connected with the rear part of this traveling part 10 via the raising / lowering mechanism 70 so that raising / lowering is possible.

  In the traveling unit 10, the engine 30 is provided on the front portion of the vehicle body frame 14 and is covered with the bonnet 17 from above and from the side. A radiator 33 and a radiator cover 38 are disposed on the right side of the engine 30. The transmission case is supported by the front portion of the body frame 14 and is disposed below the engine 30.

  The front axle case 11 is supported on the front portion of the vehicle body frame 14, and the front wheels 15 are attached to the left and right sides of the front axle case 11. The rear axle case 12 is supported by the rear portion of the vehicle body frame 14, and the rear wheels 16 are attached to the left and right sides of the rear axle case 12.

  The power transmission mechanism transmits the power of the engine 30 to the left and right front wheels 15 and the left and right rear wheels 16 through the transmission case, respectively, so that the front wheels 15 and the rear wheels 16 are rotationally driven. Configured. Thereby, the traveling unit 10 can travel forward or backward.

  In the traveling unit 10, a driving operation unit 13 is provided in the middle of the vehicle body 14 before and after. An annular steering handle 20 for steering operation, a shift pedal for shifting operation, and the like are disposed in front of the driving operation unit 13. A driver's seat 21 is disposed at the rear of the driving operation unit 13 so as to be located behind the steering handle 20.

  In addition, around the steering handle 20 and the driver's seat 21 of the driving operation unit 13, a dashboard 19, a vehicle body cover 18 having a part of the step for getting on and off, and other operating tools such as a lever and a switch are arranged. . With the steering handle 20, the speed change pedal, and other operation tools, it is possible to perform appropriate operations on the traveling unit 10 and the planting unit 40.

  In the traveling unit 10, the preliminary seedling mounts 25 are attached to the respective attachment frames 24 erected from the left and right sides of the front portion of the body frame 14, and are arranged on the left and right sides of the bonnet 17. And a reserve seedling is mounted in the reserve seedling mounting stand 25, and the seedling supply to the planting part 40 is attained.

  In the traveling unit 10, a fertilizer application device 23 is supported on the rear portion of the vehicle body frame 14 via a support frame 22 and the like, and is disposed behind the driver seat 21 of the driving operation unit. The fertilizer application device 23 is configured to be operated by power from the engine 30 so as to perform fertilization on a farm field.

  In the planting part 40, a planting mission case is supported near the lower center of the planting frame 49, and a transmission shaft case extends from the planting mission case to the left and right sides. Four planting transmission cases 46 are respectively extended rearward from the transmission shaft case and arranged at appropriate intervals in the left-right direction.

  A rotary case 44 is rotatably supported on the left and right sides of the rear end portion of each planting transmission case 46. The number of the rotary cases 44 is the same as the number of planting strips, that is, eight in this embodiment. Then, the two planting claws 45 are attached to both sides of the rotary case 44 in the longitudinal direction so as to sandwich the rotation fulcrum of the rotary case 44.

  The seedling stage 41 is disposed above the planting transmission case 46 in a tilted state with front and rear, and is attached to the rear portion of the planting frame 49 so as to be reciprocally movable in the left-right direction via upper and lower guide rails. The seedling table 41 can be reciprocated horizontally by a lateral feed mechanism (not shown).

  The seedling mounting bases 41 having a plurality of (eight) seedling mat mounting portions are arranged in the left-right direction so that each lower end side faces one rotary case 44. Then, the seedling mat is placed on each seedling stage 41, and one seedling can be cut from the seedling mat on the seedling stage 41 by the planting claws 45 when the rotary case 44 rotates.

  A seedling vertical feed belt 47 according to the number of strips is provided on the seedling mount 41. The seedling vertical feed belt 47 can be operated so as to vertically feed the seedling mat on the seedling stage 41 downward by the vertical feed mechanism every time the seedling stage 41 reaches the stroke end of the left and right reciprocating horizontal feed. Is done.

  The power of the engine 30 is transmitted to each rotary case 44 via a planting mission case and the like, and the rotary case 44 is configured to rotate. Thereby, with the rotation operation of the rotary case 44, the two planting claws 45 can alternately take out the seedlings from the seedling mat on the seedling mount 41 and plant them in the field.

  At the same time, the power of the engine 30 is transmitted to the horizontal feed mechanism and the vertical feed mechanism through a planting mission case or the like, and the seedling stage 41 is reciprocated horizontally by the horizontal feed mechanism. The mat is configured to be vertically fed by the vertical feed mechanism via the seedling vertical feed belt 47 in accordance with the left and right reciprocating horizontal feed of the mounting table. Thereby, the seedling mat on the seedling placing table 41 is moved to an appropriate position with respect to the planting claws 45.

  Here, the power transmission mechanism for transmitting power from the engine 30 to the fertilizer application 23, the rotary case 44, the lateral feed mechanism, and the vertical feed mechanism includes a planting clutch, and the engine according to the connection / disconnection of the planting clutch. Is transmitted to the seedling vertical feed belt 47 and the rotary case 44 or is not transmitted.

  In the planting part 40, the left and right center floats 42 for leveling the farm scenes for the two central strips and the left and right side floats 43 for leveling the farm scenes for the two right and left strips are respectively provided in the front part. The side is supported on the planting frame 49 side so as to be movable up and down with the rear side as a rotation fulcrum, and is disposed below the planting transmission case 46.

  In the planting part 40, the drawing marker 48 is supported rotatably on both the left and right sides of the lower part of the planting frame 49. Each of the left and right line drawing markers 48 is stored by turning upward with the base end side as a rotation fulcrum. Or it is made to project to the right side so that it can be drawn on the field.

  Further, the lifting mechanism 70 described above is provided between the traveling unit 10 and the planting unit 40. Specifically, the top link 71 and the lower link 72 are installed between the traveling unit 10 and the planting unit 40, and the lifting cylinder is connected between the lower link 72 and the traveling unit 10. And the planting part 40 can be rotated to the up-down direction with respect to the traveling part 10, that is, can be raised or lowered, by the expansion and contraction operation of the lifting cylinder.

  Next, the configuration of the bonnet 17 will be described in more detail.

  As shown in FIG. 3, the bonnet 17 is a hollow member, and is formed in a tapered shape as a whole by inclining in front and rear and rear height in a side view. The bonnet 17 is placed on the front portion of the vehicle body frame 14 as shown in FIG. As shown in FIGS. 4 and 5, devices such as the engine 30, the radiator 33, and the radiator cover 38 are accommodated in the bonnet 17. A dashboard 19 is provided at the rear upper part of the bonnet 17. An operation panel 19 a is arranged on the upper surface of the dashboard 19. On the operation panel 19a, operation tools such as levers and switches and a display device are arranged.

  Moreover, the bonnet 17 has the ventilation port 17b. The ventilation opening 17b is opened in the left-right direction at the lower part of the left and right side walls of the bonnet 17, and is formed in a horizontally long polygonal shape. A cover 26, which is a member that removes dust and the like with air permeability such as a net, is attached to the bonnet 17 so as to completely cover the vent hole 17 b. The ventilation port 17b is an air intake / exhaust port in the bonnet 17 and allows the inside and outside of the bonnet 17 to communicate with each other. When a cooling fan 31 described later is driven to rotate, air is sucked into the bonnet 17 from the outside through the ventilation openings 17b on the left and right sides, and the sucked air is drawn outside the bonnet 17 through the ventilation openings 17b on the left and right sides. Is exhausted. In the present embodiment, the right ventilation port 17b is an air intake port, and the left ventilation port 17b is an air discharge port.

  Next, the internal configuration of the bonnet 17 will be described with reference to FIGS.

  As shown in FIG. 5, in the bonnet 17, the engine 30 is arranged at the approximate center of the front, rear, left, and right with the crankshaft (not shown) oriented in the lateral direction, that is, the lateral direction with respect to the traveling direction of the aircraft. And placed on the body frame 14. As shown in FIG. 4, a flywheel 30 a is fixed to the left end portion of the crankshaft of the engine 30.

  As shown in FIGS. 4 and 5, an air cleaner 32 is disposed above the engine 30 with the longitudinal direction being the front-rear direction. The air cleaner 32 purifies dust and foreign matters in the air sucked by the engine 30 by a filter attached to the air cleaner 32. One end side of the first intake pipe 32a is connected to the rear end portion of the air cleaner 32, the other end side of the first intake pipe 32a is connected to the engine 30, and the air cleaner 32 is communicated with the engine 30 via the first intake pipe 32a. The One end side of the second intake pipe 32b is connected to the right side of the air cleaner 32, and the other end side of the second intake pipe 32b is inserted into a radiator cover 38 described later.

  As shown in FIGS. 5 and 6, a radiator 33 is disposed on the right side of the engine 30 so as to be adjacent to the right vent 17 b of the bonnet 17 (see FIG. 4). The radiator 33 is fixed to the vehicle body frame 14 via an attachment member (not shown) provided at the lower portion of the radiator 33 in a state where the radiator 33 is covered with the radiator cover 38. The radiator 33 cools the cooling water of the engine 30 and includes a radiator core 34 in which a large number of pipes through which the cooling water circulates are stretched. A cooling water supply unit 35 formed in a cylindrical shape is disposed on the radiator 33. The water supply unit 35 protrudes upward from the cutout portion 56 of the upper side portion 53 of the radiator cover 38. A cap 36 is detachably attached to the upper end portion of the water supply unit 35. As shown in FIG. 6, an attachment portion 37 for attaching the third water supply pipe 39 a is provided on the side portion of the water supply portion 35 so as to protrude forward. One end side of the third water supply pipe 39a is connected to the mounting portion 37 of the water supply section 35, the other end side of the third water supply pipe 39a is connected to the reservoir tank 39, and the radiator 33 is connected via the reservoir tank 39 and the third water supply pipe 39a. Communicated. Thereby, the cooling water in the radiator 33 becomes a predetermined amount.

  As shown in FIG. 4, a cooling fan 31 is disposed between the radiator 33 and the engine 30. The cooling fan 31 has a drive shaft linked to the crankshaft of the engine 30 via a pulley and a belt, and can be driven to rotate by the crankshaft. As the cooling fan 31 is driven to rotate, air outside the bonnet 17 is sucked into the bonnet 17 through the right ventilation port 17b, and the sucked air flows as cooling air inside the radiator cover 38 and around the engine 30. After that, the air is discharged from the inside of the bonnet 17 to the outside through the left vent 17b.

  Next, the configuration of the radiator cover 38 will be described in more detail with reference to FIGS.

  As shown in FIG. 6, the radiator cover 38 is disposed around the radiator 33, and covers the front and rear of the radiator 33, a part of the left side, an upper part, and a part of the lower part. As shown in FIG. 4, the radiator cover 38 is formed such that the shape of the entire right side surface is formed substantially along the shape of the inner peripheral surface of the right side wall of the bonnet 17, and the radiator 33 is covered on the right side of the engine 30. Thus, the right side surface is brought into close contact with the right side wall of the bonnet 17 so as not to generate a gap with the bonnet 17. The radiator cover 38 includes a cover body 50, a shroud 61, an elastic member 62, and the like.

  As shown in FIGS. 6 to 8, the cover main body 50 is a member that constitutes the outline of the radiator cover 38, and includes a front side portion 51, a rear side portion 52, an upper side portion 53, and a left side portion 54. Part, a part of the left side part 54 and a lower side part are formed in a substantially box shape (hereinafter, the opening formed in the right side part of the cover body 50 is referred to as a right side opening part 90). The cover body 50 sets the length in the front / rear / up / down / left / right directions slightly longer than the length of the front / rear / up / down / left / right of the radiator 33, and accommodates the radiator 33 therein.

  As shown in FIG. 7, the upper side portion 53 of the cover body 50 extends in the front-rear direction continuously to the upper end portion of the front side portion 51 and the upper end portion of the rear side portion 52. The upper portion 53 of the cover body 50 is provided with a notch portion 56 and a bulging portion 55.

  The cutout portion 56 is formed by cutting the right side of the upper portion 53 of the cover body 50 into a substantially rectangular shape in plan view, and is disposed at the approximate center of the upper portion 53 in the front-rear direction. As described above, the water supply portion 35 formed in the cylindrical shape of the radiator 33 protrudes upward from the notch portion 56.

  The bulging portion 55 is formed at the rear upper portion of the cover body 50 so as to bulge in a direction opposite to the radiator 33 and in a direction orthogonal to the axial direction of the crankshaft, specifically, bulge upward. The air cleaner 32 is disposed on the right side of the air cleaner 32 so as to face the air cleaner 32. The upper surface of the bulging portion 55 extends from the vicinity of the rear end of the cutout portion 56 of the upper portion 53 toward the rear upper side, is bent at the extended end portion, and then extends rearward to the rear end of the upper portion 53. Extended. Thus, the upper portion 53 of the cover main body 50 is formed in a substantially step shape so that the front portion is low and the rear portion is higher than the bulging portion 55, and as shown in FIG. The bonnet 17 is arranged along the upper inner peripheral surface.

  As shown in FIGS. 6 and 7, above the cutout portion 56, the attachment portion 37 for attaching the third water supply pipe 39 a is forward from the side of the water supply portion 35, that is, the bulging portion 55. It protrudes toward the opposite side. With such a configuration, the third water supply pipe 39a for connecting to the reserve tank 39 is connected to the radiator 33 via the mounting portion 37 without interfering with the radiator cover 38 (particularly the bulging portion 55). Is possible. Therefore, it is not necessary to cut out or design the bulging portion 55 to be small, so that the bulging portion 55 can be configured with an optimal shape and size.

  As shown in FIG. 8, a plurality of left side openings, that is, a first left side opening part 57, a second left side opening part 58, and a third left side opening part 59 are provided on the side surface (left side part 54) of the cover body 50. , And a fourth left side opening 60.

  The first left opening 57 is an opening through which the air sucked through the vent 17 b of the bonnet 17 through the radiator cover 38 through the cooling fan 31 is driven toward the engine 30. The first left-side opening 57 is opened in a substantially circular shape in a side view in the left-right direction on the entire left-side portion 54 including the bulging portion 55 of the radiator cover 38. A shroud 61 that surrounds a cooling fan 31 described later extends from the opening edge of the first left opening 57 to the left. The cooling fan 31 is disposed inside the shroud 61. Here, the inner diameter of the first left opening 57 is set longer than the outer diameter of the cooling fan 31.

  The second left opening 58 is an opening that is inserted into and supported by the second intake pipe 32b. The second left-side opening 58 is opened in a substantially circular shape in a side view in the left-right direction 54 in the bulging portion 55 toward the left-right direction. The second left-side opening 58 is positioned above the radiator 33 housed in the radiator cover 38 and is disposed so as not to overlap the radiator 33 when viewed from the ventilation port 17b side of the bonnet 17. The extended end portion (the other end side) of the second intake pipe 32b extending from the air cleaner 32 substantially parallel to the axial direction of the crankshaft is connected to the radiator cover 38 from the engine 30 side to the second left side opening 58. It is inserted inward and supported so as to face the right opening 90 while protruding into the bulging portion 55 (see FIG. 5). As a result, the inside of the radiator cover 38 and the air cleaner 32 are communicated with each other via the second intake pipe 32 b, and the air is supplied to the inside of the radiator cover 38 by the rotational drive of the cooling fan 31 and the air vent 17 b of the bonnet 17 and the radiator cover. When the air is sucked in through the right side opening 90 of 38, it is introduced into the air cleaner 32 through the second intake pipe 32b before passing through the radiator 33.

  The third and fourth left side openings 59 and 60 are openings through which the cooling water pipes 59a and 60a are inserted, respectively. The third left opening 59 is opened in a substantially circular shape in a side view in the left-right direction in front of the first left opening 57 of the left side 54. As shown in FIG. 7, the attachment portion 33 a of the first water supply pipe 59 a provided in the radiator 33 protrudes from the third left opening 59 toward the left side. Then, one end side of the first water supply pipe 59a is connected to the attachment portion 33a, and the other end side of the first water supply pipe 59a is connected to the engine 30. The fourth left-side opening 60 is opened in a substantially circular shape in a side view in the left-right direction below the first left-side opening 57 of the left-side portion 54. A mounting portion (not shown) of the second water supply pipe 60 a provided in the radiator 33 projects from the fourth left side opening 60 toward the left side. Then, one end side of the second water supply pipe 60 a is connected to the mounting portion, and the other end side of the second water supply pipe 60 a is connected to the engine 30. With such a configuration, the radiator 33 and the engine 30 communicate with each other via the two pipes 59a and 60a, and the cooling water after cooling the engine 30 is supplied from the engine 30 to the radiator 33 via the first water supply pipe 59a. Then, the cooling water cooled by the radiator 33 flows into the engine 30 from the radiator 33 through the second water supply pipe 60a.

  The shroud 61 efficiently guides air from the radiator 33 toward the engine 30 side by the rotational drive of the cooling fan 31 so that airflow is not disturbed. The shroud 61 is formed in a cylindrical shape in the left-right direction, and integrally fixes the opening edge of the right opening to the opening edge of the first left opening 57 of the cover main body 50 and faces the engine 30 to the left opening. The arrangement is as follows. As shown in FIG. 7, the shroud 61 is disposed so as to cover a part of the cooling fan 31, specifically, substantially the right half in a plan view.

  With such a configuration, when the cooling fan 31 is rotationally driven with a simple configuration, the air that has passed through the radiator 33 is concentrated and sent to the engine 30 side. Therefore, the cooling effect of the engine 30 can be enhanced with a simple configuration. Further, the air sent to the engine 30 side by the cooling fan 31 is limited to the air inside the radiator cover 38. Therefore, the air inside the radiator cover 38 can be efficiently discharged to the outside (the engine 30 side) through the first left side opening 57. Accordingly, the air outside the hood 17 is accordingly discharged to the inside of the radiator cover 38. The air can be efficiently sucked through the vent hole 17b and the right opening 90. As a result, the cooling effect of the radiator 33 can be enhanced with a simple configuration. Further, it is not necessary to provide the shroud 61 as a separate member from the radiator cover 38. Therefore, the number of members can be reduced, and the manufacturing cost can be reduced.

  The elastic member 62 is a seal member made of a material such as sponge or rubber. The elastic member 62 is provided at the right end of each of the front side 51, the upper side 53, and the rear side 52 of the cover body 50 (in other words, at the opening edge of the right side opening 90), that is, the bonnet of the cover body 50. 17 is attached so as to surround the right end which is the outer peripheral end on the side close to 17. The elastic member 62 is in contact with the right side wall of the bonnet 17 without a gap, and makes the cover body 50 and the bonnet 17 in close contact with each other. As a result, the front side portion 51, the upper side portion 53 and the rear side portion 52 of the cover main body 50 to which the elastic member 62 is attached, and the right side wall of the bonnet 17 are sealed so as not to vent (the radiator cover 38). The outside and the air inside the hood 17 are not sucked into the radiator cover 38).

  With such a configuration, the air inside the hood 17 outside the radiator cover 38 (air after cooling the engine 30, hydraulic piping (not shown), etc.) circulates inside the hood 17 to radiate the radiator cover 38. And intake of air into the radiator cover 38 from between the right side wall of the bonnet 17 can be prevented. Therefore, it is possible to prevent the radiator 33 and the engine 30 from being cooled again by the air after the radiator 33 and the engine 30 are cooled (the temperature has increased). As a result, the cooling effect of the radiator 33 can be enhanced. Further, the air outside the bonnet 17 drawn into the bonnet 17 by the cooling fan 31 through the right ventilation port 17 b passes through the gap between the right side wall of the bonnet 17 and the right end portion of the radiator cover 38. And does not leak into the bonnet 17. That is, the air outside the bonnet 17 sucked into the radiator cover 38 can be reliably guided to the engine 30. As a result, the cooling effect of the engine 30 can be enhanced.

  The rice transplanter 1 having the above-described configuration includes an engine 30 that is disposed in a state in which the crankshaft is lateral to the traveling direction of the aircraft, a radiator 33 that is disposed on one lateral side of the engine 30, and the A radiator cover 38 that covers the radiator 33; a cooling fan 31 that is disposed between the engine 30 and the radiator 33 and is driven to rotate by the engine 30; and the engine 30 and the radiator 33 that are housed therein. In a work vehicle that includes a radiator cover 38 and a bonnet 17 that covers the cooling fan 31 and that has a ventilation port 17b in a portion facing the radiator 33 in a lateral direction, the radiator cover 38 is connected to the ventilation port 17b of the bonnet 17. A right opening 90 (first opening) that opens toward the side, and the engine 30 side The first left-side opening 57 (second opening) that opens toward the radiator 33 and the bulging portion 55 that bulges toward the opposite side of the radiator 33, and extends from the air cleaner 32 of the engine 30. The extended end portion of the second intake pipe 32b (intake pipe) is inserted into and supported by the bulging portion 55 and faces the right opening 90 (first opening).

  With such a configuration, when the cooling fan 31 is rotationally driven by the engine, the air from the outside of the radiator cover 38 passes through the ventilation port 17b of the bonnet 17 and the right opening 90 (first opening) of the radiator cover 38 from the outside. After being sucked into the interior and passing through the radiator 33, the air flows to the engine 30 side through the first left opening 57 (second opening), and before passing through the radiator 33, the air cleaner passes through the second intake pipe 32b (intake pipe). 32 will be introduced. Therefore, the air before being heated by the heat from the radiator 33 and the engine 30 inside the bonnet 17 is introduced into the air cleaner 32 of the engine 30 with a simple configuration using the radiator cover 38 and the second intake pipe 32b (intake pipe). can do.

  Further, in the rice transplanter 1, the radiator cover 38 causes the bulging portion 55 to bulge along the inner peripheral surface of the bonnet 17 in a direction perpendicular to the axial direction of the crankshaft, thereby causing the bulging. The entire right opening 90 (first opening) side including the portion 55 is brought into close contact with the inner peripheral surface of the bonnet 17.

  With such a configuration, the radiator cover 38 is arranged so that no gap is formed between the right opening 90 (first opening) side and the inner peripheral surface of the bonnet 17, and from the ventilation opening 17 b of the bonnet 17. Only the sucked air is introduced into the air cleaner 32 through the second intake pipe 32b (intake pipe). Therefore, the air before being heated by the heat from the radiator 33 and the engine 30 inside the bonnet 17 can be efficiently introduced into the air cleaner 32 of the engine 30 with a simple configuration.

  In the rice transplanter 1, the radiator cover 38 is configured integrally with a shroud 61 surrounding the cooling fan 31.

  With such a configuration, when the cooling fan 31 is rotationally driven, the air that has passed through the radiator 33 is concentrated and sent to the engine 30 side. Therefore, the cooling effect of the engine 30 can be enhanced with a simple configuration. Further, the air sent to the engine 30 side by the cooling fan 31 is limited to the air inside the radiator cover 38. Therefore, the air inside the radiator cover 38 can be efficiently discharged to the outside (the engine 30 side) through the first left side opening 57. Accordingly, the air outside the hood 17 is accordingly discharged to the inside of the radiator cover 38. The air can be efficiently sucked through the vent hole 17b and the right opening 90. As a result, the cooling effect of the radiator 33 can be enhanced with a simple configuration. Further, it is not necessary to provide the shroud 61 as a separate member from the radiator cover 38. Therefore, the number of members can be reduced, and the manufacturing cost can be reduced.

  Moreover, in the rice transplanter 1, the sealing member which seals between the said bonnet and the said radiator cover is provided in the outer peripheral edge part by the side of the bonnet of the said radiator cover.

  With such a configuration, the air inside the hood 17 outside the radiator cover 38 (air after cooling the engine 30, hydraulic piping (not shown), etc.) circulates inside the hood 17 to radiate the radiator cover 38. And intake of air into the radiator cover 38 from between the right side wall of the bonnet 17 can be prevented. Therefore, it is possible to prevent the radiator 33 and the engine 30 from being cooled again by the air after the radiator 33 and the engine 30 are cooled (the temperature has increased). As a result, the cooling effect of the radiator 33 can be enhanced. Further, the air outside the bonnet 17 drawn into the bonnet 17 by the cooling fan 31 through the right ventilation port 17 b passes through the gap between the right side wall of the bonnet 17 and the right end portion of the radiator cover 38. And does not leak into the bonnet 17. That is, the air outside the bonnet 17 sucked into the radiator cover 38 can be reliably guided to the engine 30. As a result, the cooling effect of the engine 30 can be enhanced.

  In the rice transplanter 1, the radiator 33 projects the water supply portion 35 upward from the upper portion 53 of the radiator cover 38, and extends from a reserve water tank 39 to a third water supply pipe 39 a (water supply pipe). The portion is connected to the side opposite to the bulging portion 55 of the radiator cover 38 in the water supply portion 35.

  With such a configuration, the third water supply pipe 39a (water supply pipe) for connecting to the reserve tank 39 can be connected to the radiator 33 without interfering with the radiator cover 38 (particularly the bulging portion 55). . Therefore, the bulging portion 55 does not need to be cut out or designed to be small, so that the bulging portion 55 can be configured with an optimal shape and size.

DESCRIPTION OF SYMBOLS 1 Rice transplanter 17 Bonnet 17b Ventilation opening 32 Air cleaner 32b Second intake piping 33 Radiator 35 Water supply part 37 Mounting part 38 Radiator cover 39 Reserve tank 39a Third water supply pipe 50 Cover main body 53 Upper part 55 Expansion part 56 Notch part 57 First Left opening (second opening)
62 Elastic member 90 Right side opening (first opening)

Claims (4)

An engine arranged with the crankshaft transverse to the direction of travel of the aircraft,
A radiator disposed on one side of the engine;
A radiator cover covering the radiator;
A cooling fan disposed between the engine and the radiator and driven to rotate by the engine;
A hood that covers the engine, the radiator cover that houses the radiator, and a cooling fan that covers the cooling fan, has a ventilation opening in a portion facing the radiator in a lateral direction, and inclines front to back and rear height in a side view; In a work vehicle comprising:
The radiator cover is
A first opening that opens toward the vent of the bonnet;
A second opening that opens toward the engine side;
A bulging portion that bulges upward and rearward of the radiator ;
By extending the bulging portion, the upper portion of the radiator cover is formed so that the front portion is low and the rear portion is higher than the bulging portion, and is formed on the upper inner peripheral surface of the bonnet inclined to the front low and rear height. Place along
Opening the opening of the intake pipe to the bulge,
An extended end portion of the intake pipe extending from the air cleaner of the engine is inserted and supported through an opening portion of the intake pipe of the bulging portion, and is exposed to the first opening portion.
A working vehicle characterized by that.   The work vehicle according to claim 1, wherein the radiator cover is formed integrally with a shroud surrounding the cooling fan.   The sealing member which seals between the said bonnet and the said radiator cover is provided in the outer peripheral edge part of the side close | similar to the said bonnet of the said radiator cover, The Claim 1 or Claim 2 characterized by the above-mentioned. Work vehicle.   The radiator projects a water supply portion upward from the upper portion of the radiator cover, and connects an extended end portion of a water supply pipe extending from a reserve tank to the opposite side of the radiating portion of the radiator cover in the water supply portion. The work vehicle according to any one of claims 1 to 3, wherein:

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