JP2007056761A - Engine cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely discharge dirt by sucking the dirt adhered to a rotary screen and guiding it to a fan duct. <P>SOLUTION: A cooling fan 51 is driven by a power from an engine 12. The rotary screen 53 is disposed on the outside of the cooling fan 51. A dirt suction duct 56 is installed to sucking the dirt adhered to the outer peripheral surface of the rotary screen and guiding it to the fan duct 58 storing the cooling fan 51. A cooling body 50 is disposed between the cooling fan 51 and the rotary screen 53. A dirt releasing vane 76 is disposed between the engine 12 and the cooling fan 51. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a structure for cooling an engine of a combine, and in particular, a cooling body such as a radiator, an oil cooler or an intercooler is mounted, and air cleaned by a rotary screen is sent to a cooling body such as an oil cooler or an intercooler. The present invention relates to a combine cooling structure that cools and sucks dust sucked by a rotary screen with a cooling fan and reliably discharges the dust in the outer peripheral direction.

Conventionally, in order to cool the engine, a radiator is disposed between the outside air intake port provided outside the engine room and the engine, a cooling fan is provided between the radiator and the engine, and the cooling fan is driven by the engine. Thus, a configuration in which cooling air is sent to the radiator and the engine for cooling is known. In order to prevent clogging of the dust-proof nets (fins) provided on the outside of the radiator, a rotary blade is provided close to the outer surface of the dust-proof net, and the rotary blade is rotated by wind of cooling air. , A technique for raising dust (see Patent Document 1), and a technique for changing the angle of the cooling fan blades so that the cooling air is blown in the opposite direction (see Patent Document 1). See also known).
JP-A-9-51711 JP-A-2005-153589

  However, with the technique of Patent Document 1, the place of dust is not constant, it can only fall naturally downward, and the dust cannot be surely removed. Further, the technique of Patent Document 2 has a great effect of removing dust clogging, but cooling needs to be stopped once, and the structure for blowing air in the opposite direction becomes complicated.

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

  In other words, the cooling fan is driven by the power from the engine, the rotary screen is disposed outside the cooling fan, and the cooling fan is accommodated by sucking dust adhering to the outer peripheral surface of the rotary screen. In the configuration in which a dust suction duct leading to the fan duct is provided and a cooling body is disposed between the cooling fan and the rotary screen, a dust discharge blade is disposed between the engine and the cooling fan.

3. The fan duct according to claim 2, wherein the cooling fan is driven by power from the engine, a rotary screen is disposed outside the cooling fan, and dust attached to the outer peripheral surface of the rotary screen is sucked to store the cooling fan. In the configuration in which the dust suction duct leading to the cooling fan is provided and the cooling body is disposed between the cooling fan and the rotary screen, the dust discharge blade is disposed between the blades of the cooling fan.
According to a third aspect of the present invention, the dust discharge blade is a cooling fan.

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

  According to the configuration of the first aspect, the dust sucked from the rotary screen is sent backward by the cooling fan, and blown to the outer peripheral side by the dust discharge blade, so that the dust can be surely discharged. Wind power can be increased by increasing the number of blades, and the flow of wind becomes smooth. Moreover, the blowing of dust to the engine side is eliminated, and the engine is not soiled. Moreover, since it can be assembled separately from the cooling fan, it can be retrofitted according to the specifications.

According to the second aspect of the invention, the dust sucked from the rotary screen is sent backward by the cooling fan, and blown to the outer peripheral side by the dust discharge blade, so that the dust can be surely discharged. Wind power can be increased by increasing the number of blades, and the flow of wind becomes smooth. In addition, the cooling fan and the dust discharge blade can be configured integrally, and can be configured compactly.
According to the third aspect of the present invention, the wind power can be increased and used as cooling air by the rotation of the dust discharge blade, so that dust can be discharged and the cooling efficiency can be improved.

Next, embodiments of the invention will be described.
1 is a left side view of a combine equipped with the cooling device of the present invention, FIG. 2 is a plan view of the combine, FIG. 3 is a right side view of the combine, FIG. 4 is a rear view of the engine and the cooling device, and FIG. FIG. 6 is a left side view of the first rotary screen, FIG. 7 is a partial cross-sectional view of the first rotary screen, and FIG. 8 is a first sectional view of the first rotary screen. FIG. 9 is a left side view of the engine room cover and the first rotary screen, FIG. 10 is a schematic view showing power transmission from the engine, and FIG. 11 is a left perspective view of the second rotary screen. 12 is a rear view in which the dust discharge blade is disposed between the engine and the second cooling fan, FIG. 13 is a schematic view of the fan duct, FIG. 14 is a perspective view of the dust discharge blade, and FIG. It is a perspective view of an embodiment with integrated emission and dust emission vanes.

  First, the general configuration of a general purpose combiner equipped with the cooling device of the present invention will be described with reference to FIGS. In the general-purpose combiner, a machine body frame 13 is disposed on the crawler type traveling device 1, and a cabin 17 is configured at a front portion on the machine body frame 13. A grain tank 14 is disposed on the right side of the center portion on the machine frame 13, and a discharge auger 15 for discharging the grains from the grain tank 14 is provided from the rear of the machine body to the front.

  Further, a cutting part 8 is disposed in front of the body frame 13, and a threshing part 18 is also disposed on the upper left side of the body frame 13, and a conveying device 9 is provided between the cutting part 8 and the threshing part 18. Is configured. The conveying device 9 has a supply conveyor 11 in the feeder house 10, and the rear portion of the cutting unit 8 and the front entrance of the threshing unit 18 are communicated with each other by the feeder house 10 and are cut by the cutting unit 8. The cereal meal is transported to the threshing unit 18.

  A platform 2 is provided at the front portion of the feeder house 10, and a lateral feed auger 3 is arranged in the left-right direction at a right angle to the traveling direction on the platform 2. 4 is installed horizontally. Further, weed boards 7 and 7 are provided at the front ends of the left and right sides of the platform 2. Similarly, on the left and right sides of the rear portion of the platform 2, a rear portion of a support arm 6 that horizontally supports the reel 5 is pivotally supported. A power transmission mechanism including a belt and a pulley for rotating the reel is provided on the left and right sides of the support arm 6. Is provided. The reel 5 is configured to be lifted and lowered by a hydraulic cylinder 16 as an actuator interposed between the support arm 6 and the platform 2.

  A handling chamber 19 is formed in the threshing portion 18, and a handling cylinder 20 having an axial direction in the longitudinal direction of the machine body is provided in the handling chamber 19. A screw 21 is provided around the handling cylinder 20 in the front-rear direction, and the threshing of the cereal is performed by the rotation of the handling cylinder 20. A receiving net (or concave) 22 is provided below the handling cylinder 20, and a sorting unit 25 that selects the threshed grains below the handling cylinder 20 via the receiving net 22. Is configured. Further, dust handling valves 23, 23,... Are juxtaposed in the longitudinal direction of the machine body above the handling cylinder 20 in the handling chamber 19.

  The sorting section 25 is provided with a swing sorting device 26 having a feed pan and a chaff sheave. Below the swing sorting device 26, a red pepper 27, a first conveyor 28 and a second conveyor 29 are arranged in order from the front side. Etc. are arranged, and the grain that leaks downward from the receiving net 22 is selected. On the other hand, a spreader 24 is provided below the rear part of the handling cylinder 20, and the cereals transferred to the rear part of the handling chamber 19 by the handling cylinder 20 are finely cut and discharged to the rear part of the machine body.

  An engine 12 is disposed on the right side of the rear part on the body frame 13. In other words, the engine room 42 is arranged at the rear of the Glen tank 14 and in front of the storage chamber 41 of the vertical auger 15 a of the discharge auger 15, and the engine 12 is stored in the engine room 42. The right side surface of the engine room 42 is covered with an engine room cover 40, and the engine room cover 40 is disposed so as to be openable and closable. In this embodiment, a pivotal support portion such as a hinge is disposed on the rear side, and is rotated rearward. The engine room 42 can be opened by moving.

  The engine 12 is a diesel engine with a supercharger, which has an improved output and an exhaust gas with reduced emissions of CO, NOx and the like. As shown in FIG. 4, the engine room 42 that houses the engine 12 has the engine 12 disposed on the lower side and a fan duct 58 that houses the first cooling fan 51 on the right side that is the outer side. A supercharger intercooler 50 attached to the engine 12 is arranged on the outside (right side). Thus, the intercooler 50 is arranged close to the side of the engine 12 to shorten the piping and improve the cooling efficiency. Disposed below the fan duct 58 is a discharge conveyor 59 for discharging the grains stored in the Glen tank 14. A first rotary screen 53 is disposed on the outside air introduction portion outside the intercooler 50. In this embodiment, the intercooler 50, the radiator 60, and the oil cooler 61 are collectively referred to as a cooling body.

  A second cooling fan 62, a radiator 60, and an oil cooler 61 are disposed above the engine 12 in the engine room 42. A second cooling fan 62 is arranged in the body direction (left side) of the radiator 60, an oil cooler 61 is arranged close to the outer side of the radiator 60, and an outside air introduction portion opened in the engine room cover 40 on the outer side. A second rotary screen 64 is disposed on the screen. The second rotary screen 64 is disposed above the intercooler 50. In this manner, the engine 12, the intercooler 50, the first cooling fan 51, and the first rotary screen 53 are arranged in the lower part of the engine room 42, and the radiator 60, the oil cooler 61, and the second cooling fan 62 are disposed in the upper space. The second rotary screen 64 is arranged. In this embodiment, the first rotary screen 53 is attached to the inner side of the engine room cover 40, and the second rotary screen 64 is attached to the main body side.

Next, the configuration of each device will be described in detail.
As shown in FIGS. 4 and 10, the output shaft (crankshaft) 30 of the engine 12 is disposed in the left-right direction and housed in the engine room 42, and the output shaft 30 protrudes on both the left and right sides. An output pulley 31 is fixed on the output shaft 30 protruding in the center (inner side), and an output pulley 32 is fixed on the output shaft 30 protruding in the outward direction of the right body. A fan shaft 54 is mounted horizontally above the output pulley 32 so as to be rotatable in the left-right direction. A pulley 57 and a first cooling fan 51 are fixed on the fan shaft 54, and between the pulley 57 and the output pulley 32. The first cooling fan 51 is driven by the power of the engine 12 by the belt 33 being wound around the belt.

  The first cooling fan 51 is housed in a fan duct 58, the right side of the fan duct 58 on the suction side is connected to the outer periphery of the intercooler 50, and the cooling air sucked from the first rotary screen 53 passes through the intercooler 50. The intercooler 50 can be efficiently cooled by passing through. The air volume of the first cooling fan 51 is set on the upper side to be smaller than the air volume of the second cooling fan 62 that cools the radiator 60. That is, since it is necessary to increase the capacity for cooling the radiator 60 and the oil cooler 61 as compared with the supercharger, the blade size of the cooling fan is increased.

  The intercooler 50 and the first cooling fan 51 are shifted up and down. That is, the upper end position of the intercooler 50 is arranged lower than the upper end of the first cooling fan 51. In other words, the center of the intercooler 50 is shifted (offset) below the center of the first cooling fan 51 (fan shaft 54). This offset amount is substantially matched to the opening width of the end portion of the connection duct 93 connected to the lower end of the dust suction duct 65 provided in the upper second rotary screen 64.

  Thus, since the wind of the cooling air generated by the rotation of the second cooling fan 62 for cooling the radiator 60 and the oil cooler 61 having a large heat radiation amount is larger than the wind of the cooling air generated by the rotation of the second cooling fan 62, the offset is not offset. Even if an attempt is made to suck dust from the dust suction duct 65 of the second rotary screen 64 due to the negative pressure generated in the second, the wind force due to the rotation of the second cooling fan 62 may win and the dust may not be sucked sufficiently. Therefore, as described above, the intercooler 50 and the first cooling fan 51 are offset up and down, and the end of the connection duct 93 is positioned at the shifted portion so that the cooling air generated by the rotation of the first cooling fan 51 is resisted. By passing through the part where there is no wind, the wind power increases and the negative pressure can be increased. Therefore, this negative pressure is not defeated by the cooling wind of the second cooling fan 62, and dust can be sucked.

  Next, the first rotary screen 53 and the second rotary screen 64 will be described. As shown in FIGS. 3 and 9, the outside air introduction hole 40 b of the second rotary screen 64 is disposed above the engine room cover 40, and the outside air introduction hole 40 a of the first rotary screen 53 is disposed below the engine room cover 40. The outside air introduction holes 40a and 40b are circular. A lower first rotary screen 53 is disposed inside the outside air introduction hole 40a. The upper second rotary screen 64 is attached to the airframe side, the lower first rotary screen 53 is attached to the engine room cover 40, and the first rotary screen 53 and the second rotary screen 64 are provided on the outer side of the engine 12. The cooling air is arranged in parallel vertically and sucks the cooling air into the engine room 42 via the first rotary screen 53 and the second rotary screen 64.

  The lower first rotary screen 53 is attached to the inner surface side of the outside air introduction hole 40 b opened at the lower part of the engine room cover 40. As shown in FIGS. 6, 7, and 8, the first rotary screen 53 is configured such that a net 67 is stretched on the outer surface of a cylindrical frame 66, and the center of the frame 66 is rotated by a rotation shaft 80. The rotating shaft 80 is rotatably supported by a support frame 68 installed in the diametrical direction inside the outside air introduction hole 40b.

  Further, a rotation driving roller 70 and a driven roller 71 disposed so as to sandwich both sides of the frame body 66 and a motor 69 for driving the rotation driving roller 70 are disposed in the vicinity of the outside air introduction hole 40b. The driving roller 70 and the motor 69 are attached to a support frame 95 fixed to the engine room cover 40, the driven roller 71 is rotatably supported at one end of a support arm 72, and the support arm 72 has an intermediate part in the engine room cover 40. And the other end is urged so that the driven roller 71 is pressed against the rotary drive roller 70 by the urging force of the spring, and the two rollers 70 and 71 are framed. 66. Thus, by operating the motor 66, the rotating roller 70 is rotated, and the frame body 66 and the net body 67 are rotated around the rotation shaft 80.

  A dust suction duct 56 is arranged radially outside the mesh body 67. The dust suction duct 56 is arranged in the vertical direction, the communication hole 56a is opened at the lower end, and the upper end supports the rotating shaft 80. The upper portion has a suction hole 56b in the surface facing the net 67. The communication hole 56 a is disposed so as to be connected to the outer end of the connection duct 52 when the engine room cover 40 is closed, and the suction hole 56 b is disposed so as to be in contact with the mesh body 67 so as to adhere to the mesh body 67. Dust can be sucked.

  Further, a baffle plate 73 is disposed inside the net body 67 so as to face the suction hole 56b. That is, the baffle plate 73 is slightly wider than the dust suction duct 56 in the front-rear direction, and is arranged in the vertical direction in parallel with the dust suction duct 56. The upper part of the baffle plate 73 is supported by the rotary shaft 80, and the lower part is bent in an L shape when viewed from the rear and extends toward the inside of the body (left side) to cover the inner periphery of the first rotary screen 53. It is fixed to. In this way, the suction air from the first cooling fan 51 flows inward (leftward), but the suction air into the dust suction duct 56 is outward (rightward), so that the surrounding cooling air flows through the baffle plate 73. Thus, the suction air is surely flowed from the inside to the outside of the mesh body 67 so that the dust adhering to the outside of the mesh body 67 can be sucked into the dust suction duct 56.

  As shown in FIG. 4, the connection duct 52 is disposed obliquely so that the outer side (right side) is lowered, and one end (outer lower end) is arranged so as to connect to the communication hole 56a. Is connected to the outer periphery of the fan duct 58, and an opening is provided in a portion of the flow of large cooling air generated by the rotation of the first cooling fan 51 so that a negative pressure is generated in the dust suction duct 56.

  A rotating blade 120 is provided on the inner side (left side) of the support frame 68 that supports the rotating shaft 80. The center of the rotating blade 120 is rotatably supported by a rotating shaft 121, and the rotating shaft 121 is supported and fixed to a support frame 68. The rotary shaft 121 is arranged so as to be displaced from the rotary shaft 80 of the mesh body 67, and is arranged so that the rotation center is different, so that the rotary blade 120 rotates at an eccentric position in the frame body 67. . When the engine room cover 40 is closed, the rotary blades 120 are arranged to face the intercooler 50 with a predetermined interval.

  In such a configuration, when the first cooling fan 51 is rotated by operating the engine 12, the cooling air is sucked through the net 67 of the first rotary screen 53 disposed in the outside air introduction port 40a. When the cooling air is sucked, dust adheres to the outside of the mesh body 67. The mesh body 67 is rotated by rotating the rotation driving roller 70 and the driven roller 71 by the driving of the motor 69. Since the dust suction duct 56 is disposed outside the 67, the dust adhering to the outside of the mesh body 67 is removed from the portion facing the dust suction duct 56 with the rotation, and the mesh body 67 is sequentially rotated. The entire circumference is removed and clogging can be prevented.

  The intercooler 50 is cooled by cooling air generated by driving the first cooling fan 51 toward the inside of the machine body. A crosspiece member or a net member is disposed on the outer surface of the intercooler, and dust adheres to the intercooler 50. I try not to. That is, the dust is sucked on the cooling air and adheres to and accumulates on the crosspiece member or the net member, but the rotating blade 120 is rotated by the flow of the cooling air, and the rotating blade 120 rotates to rotate the rotating blade. A negative pressure is generated between the outer surface (right surface) of the intercooler 50 disposed opposite to the rotating blade 120 and the rotary blade 120, a flow is generated on the rotating blade 120 side, and dust accumulated on the outer surface side of the intercooler 50 is removed. It lifts up, peels off by applying vibration, and dust is discharged from the fan duct 58.

  A radiator 60 is provided above the engine 12. An oil cooler 61 is provided on the outside (right side) of the radiator 60, and an upper second rotary screen 64 is provided on the outside (right side), and the inside (left side) of the second rotary screen 64. The outer periphery and the outer (right side) outer periphery of the radiator 60 are covered with a shroud 75, and outside air is introduced into the oil cooler 61 and the radiator 60 by introducing the outside air through a circular outside air introduction hole 40 b opened at the top of the engine room cover 40. To cool down. On the other hand, a second cooling fan 62 is disposed on the inner side (left side) of the radiator 60, and a pulley 63 is fixed on a drive shaft 62 a of the second cooling fan 62, and is driven from the engine 12 via a belt transmission mechanism. The power is transmitted.

The belt transmission mechanism from the engine 12 will be described with reference to FIG.
An output pulley 31 is fixed on the inner (left side) output shaft 30 of the engine 12, and an output pulley 32 is fixed on the outer (right side) output shaft 30. The output pulley 32 extends rearward from the output pulley 32. The discharge conveyor 59 and the discharge auger 15 can be driven via the belt transmission mechanism provided. Further, a dynamo 88 is disposed in the upper front portion of the engine, and a pulley 89 is fixed on the output shaft of the dynamo 88. The belt 33 is interposed between the pulley 32, the pulley 89, and the pulley 57 fixed on the fan shaft 54. Is wound, power is transmitted to the dynamo 88 to generate electric power, and the first cooling fan 51 is driven.
A counter case 85 is erected on the body frame 13 in front of the engine 12, and a counter shaft 86 is pivotally supported on the counter case 85 so as to be rotatable in the left-right direction. 87 is fixed, and a belt 96 is wound between the counter pulley 87 and the output pulley 31 to transmit power. The belt transmission mechanism is extended upward from the pulley fixed on the counter shaft 86 to transmit power to the input pulley 63 fixed on the drive shaft 62a of the second cooling fan 62, and the counter shaft Power is transmitted from a pulley on 86 to a traveling device, a threshing device, a cutting attachment, and the like via a belt transmission mechanism.

  As shown in FIG. 11, the second rotary screen 64 disposed on the right side of the oil cooler 61 includes a bottomed cylindrical net 81, a motor 82 for rotating the net 81, and the net. The dust suction duct 65 is disposed so as to be in sliding contact with the outer surface and the outer peripheral surface of the body 81.

  The net 81 has a net-like outer side surface and outer peripheral surface so that dust can be removed during suction, the inner side (left side) is open, and the frame 81 is appropriately reinforced with a frame. A rotating shaft 83 is provided in the horizontal direction in the center of the net 81, and one end of the rotating shaft 83 is rotatably supported on the upper part of the dust suction duct 65, and the central portion of the net 81 is fixed inside. It is installed. The other side of the rotating shaft 83 is rotatably supported by the support frame 90, and a driving gear 84 is fixed to the end thereof. The drive gear 84 meshes with a gear 91 fixed to the output shaft of the motor 82, and the net 81 is rotated via the gear 91, the drive gear 84, and the rotary shaft 83 by driving the motor 82. I have to. The motor 82 is fixed to the support frame 90 via a bracket and is housed inside the net 81.

  The dust suction duct 65 is configured such that a square pipe is formed in a substantially L shape when viewed from the rear, and is arranged in the vertical direction so that the left side surface and the upper surface facing the mesh body 81 are opened so that dust can be sucked. Yes. The upper part of the dust suction duct 65 rotatably supports the rotary shaft 83, and the lower inner (left side) end is fixedly supported on a support frame 92 that supports the second rotary screen 64, and is connected to the connection duct. 93 (FIG. 4) is communicated with one upper end. The other lower end of the connection duct 93 communicates with the upper part of the fan duct 58 so that the cooling air flows by the operation of the first cooling fan 51 and a negative pressure is generated in the dust suction duct 65.

  A baffle plate 94 is disposed inside the net 81 so as to face the dust suction duct 65. The baffle plate 94 is formed by bending the plate into a substantially L shape when viewed from the rear. The baffle plate 94 has a width wider than the width and length of the opening of the dust suction duct 65, and the upper end is pivoted about the rotary shaft 83. The other end on the lower side is fixed to the support frame 92. That is, the baffle plate 94 is disposed substantially parallel to the opening surface of the dust suction duct 95, and the net body 81 is disposed between the baffle plate 94 and the dust suction duct 65.

  Thus, the first cooling fan 51 and the second cooling fan 62 are rotationally driven, and the motor 82 is rotationally driven, whereby the cooling air is sucked from the outside air introduction hole 40b by the rotation of the second cooling fan 62, and the dust suction is performed. Dust is removed when passing through the duct 65, and the purified cooling air reaches the radiator 60 and the oil cooler 61 to be cooled. When the cooling air passes through the net body 81, dust adheres to the surface. On the other hand, negative pressure is generated in the dust suction duct 65 through the connection duct 93 having one end opened at a portion where the flow of the cooling air is large due to the rotation of the first cooling fan 51, and the dust adhering to the outer surface of the net body 81. Can be aspirated. At this time, since the baffle plate 94 is arranged inside the net body 81, the influence of the cooling air around it is small, and the amount entering the dust suction duct 65 is limited, and the suction wind force becomes large, Dust removal can also be performed efficiently.

  The front end of the connection duct 93 communicates with the outer (right side) upper portion of the fan duct 58 on the suction side of the first cooling fan 51, and sucks dust adhering to the second rotary screen 64 from the dust suction duct 65. The front end of the connection duct 52 is communicated with the lower (right side) lower portion of the fan duct 58 so that dust adhering to the first rotary screen 53 is sucked from the dust suction duct 56.

  As shown in FIG. 13, the fan duct 58 extends from the inner side (left side), which is the discharge side of the first cooling fan 51, downward from the front and rear sides to constitute discharge ducts 58 a and 58 b. . That is, one end of each of the discharge ducts 58a and 58b is connected to both the front and rear sides of the substantially circular fan duct 58 on the exhaust side, and the other ends of the discharge ducts 58a and 58b are extended downward as shown in FIG. And disposed so as to be positioned above the discharge conveyor 59.

  Thus, by the rotation of the first cooling fan 51, the outside air is cleaned and sucked by the first rotary screen 53 and cooled against the intercooler 50, and the negative pressure generated by the suction air generated by the rotation of the first cooling fan 51. By sucking the dust adhering to the upper and lower second rotary screens 64 and the first rotary screen 53 from the dust suction ducts 65 and 56, transporting them to the fan duct 58, and discharging them downward from the discharge ducts 58a and 58b on both front and rear sides. Further, it is possible to prevent dust from being applied to the engine 12 and to prevent dust from adhering to and accumulating on the engine 12. The dust discharged downward from the discharge ducts 58a and 58b hits the upper part of the pipe-shaped discharge conveyor 59 and falls downward, so that the dust is discharged outward without moving inside the machine body and is accumulated on the discharge conveyor 59. There is nothing.

  It is also possible to provide a discharge blade on the discharge side of the first cooling fan 51. That is, as shown in FIG. 12, a dust discharge blade 76 is provided between the engine 12 and the first cooling fan 51 on the discharge side of the first cooling fan 51 on the fan shaft 54 in the fan duct 58. . That is, the dust discharge blades 76 are arranged on the downstream side of the first cooling fan 51, and the dust discharge blades 76 are configured to discharge the dust in the outer peripheral direction. Specifically, as shown in FIG. 14, the blade body 76a constituting the discharge blade 76 is formed by bending a belt-like plate into an L-shape in cross-section and fixing the boss body 76b in the radial direction, And a plane perpendicular to the axis are formed, and a plurality of blade bodies 76a, 76a... Are attached to the outer periphery of the boss body 76b in the radial direction to form the discharge blade 76. is there. However, the dust discharge blade 76 can also act as a cooling fan by allowing it to blow air.

  Thus, the cooling air mixed with dust is blown in the engine direction (leftward) by the rotation of the first cooling fan 51, and is blown in the outer peripheral direction by the rotation of the discharge blade 76 located on the downstream side thereof, and the discharge duct 58a.・ It is discharged out of the machine from 58b.

  Also, the discharge blade 76 can be configured integrally with the first cooling fan 51. That is, as shown in FIG. 15, the cooling air blowing blades 51 a and the discharging blade bodies 76 a configured as described above are alternately arranged on the fan shaft 54. By configuring in this way, the axial length can be shortened and a compact configuration can be achieved, and the sucked cooling air can be sent directly in the outer circumferential direction. Then, by making the dust discharge blade 76 a blade having a blowing action, it can also serve as a cooling fan, and the wind power can be increased to improve the discharge effect and the cooling efficiency.

The left view of the combine which mounts the cooling device of this invention. The top view of a combine. The right view of a combine. The rear view of an engine and a cooling device. The right side view of the intercooler and the second rotary screen with the engine room cover open. The left view of a 1st rotary screen. The top view partial cross section figure of a 1st rotary screen. The front view partial cross section figure of a 1st rotary screen. The left view of an engine room cover and a 1st rotary screen. The schematic diagram which shows the power transmission from an engine. The left perspective view of a 2nd rotary screen. The rear view which has arrange | positioned the blade | wing for dust discharge | release between an engine and the 2nd cooling fan. The schematic diagram of a fan duct. The perspective view of the blade | wing for dust discharge | release. The perspective view of the Example which integrated the cooling fan and the blade | wing for dust discharge | release.

Explanation of symbols

12 Engine 50 Intercooler 51 First cooling fan 52 Connection duct 53 First rotary screen 56 Dust suction duct 58 Fan duct 60 Radiator 61 Oil cooler 62 Second cooling fan 64 Second rotary screen 65 Dust suction duct

Claims (3)

  A dust suction duct that drives a cooling fan by power from the engine, arranges a rotary screen outside the cooling fan, sucks dust adhering to the outer peripheral surface of the rotary screen, and guides it to a fan duct that houses the cooling fan. An engine cooling apparatus comprising: a cooling body disposed between the cooling fan and the rotary screen; and a dust discharge blade disposed between the engine and the cooling fan.   A dust suction duct that drives a cooling fan by power from the engine, arranges a rotary screen outside the cooling fan, sucks dust adhering to the outer peripheral surface of the rotary screen, and guides it to a fan duct that houses the cooling fan. An engine cooling apparatus comprising: a cooling body disposed between the cooling fan and the rotary screen; and a dust discharge blade disposed between the cooling fan blade and the blade. The engine cooling device according to claim 1 or 2, wherein the dust discharge blade is a cooling fan.

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