JP2010058613A - Dust arrester of combine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust arrester of a combine capable of enhancing dust discharging efficiency by smoothly feeding the dust sucked in an air intake duct toward a fan case. <P>SOLUTION: In the dust arrester 70 of the combine, the dust deposited on an outer surface of a rotary screen 71 in an air intake duct 85 by the suction power of an intake fan is sucked and removed, and discharged from a fan case 90. The air intake duct 85 is arranged in an inclined manner so as to be shifted downwardly toward the outer circumferential side from a center part side of the rotary screen 71. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dust removing device that removes dust contained in outside air when outside air for cooling an engine is taken in from an outside air intake port of an engine unit and sent toward the engine in a combine.

  Conventionally, in a combine, an engine cover that covers the engine from the outside is provided on one side of the engine installed in the engine room of the engine unit, and the outside air for taking the engine cooling outside air into the engine room is provided in the engine cover. An intake is provided. Further, a dust removing device (rotary screen) for preventing dust from being taken into the engine room from the outside air inlet together with outside air for cooling the engine is provided in the engine cover and its peripheral portion (see, for example, Patent Document 1). .)

The dust remover includes a rotary screen for dust removal, an intake duct, an intake fan, etc., and when the outside air is taken into the engine room from the outside air intake port of the engine section, the suction force of the intake fan causes the outer surface of the rotary screen to be removed. The adhering dust is sucked into and removed from the intake duct, is sent toward the outer peripheral side of the rotary screen, and can be discharged downward from the fan case in which the intake fan is installed. Thereby, after the outside air is purified by the dust removing device in the engine portion of the combine, it can be blown toward the engine as cooling air.
JP 2008-74171 A

  In a conventional combine dust remover, the air intake duct extends substantially horizontally from the center side toward the outer peripheral side on the outer surface of the rotary screen, and is connected to a fan case provided below the air intake duct. ing. Therefore, when dust is sucked into the intake duct and then sent from the intake duct toward the fan case, it may not be smoothly sent.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a combined dust device capable of smoothly sending dust sucked into an air intake duct toward a fan case and improving dust discharge efficiency.

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

  That is, according to the first aspect of the present invention, a rotary screen for dust removal is provided at the outside air intake of the engine unit to allow dust to adhere to the outer surface, and is provided inside the rotary screen, and the rotary screen is driven to rotate. An actuator that can be provided, an intake duct that is provided with an intake port facing the outer surface of the rotary screen, and that extends from the center side of the rotary screen toward the outer peripheral side; and an inner side of the rotary screen. A shielding plate disposed opposite to the intake duct across the rotary screen, an intake pipe provided on the outer peripheral side of the rotary screen and on the inner side of the intake duct, and connected to the intake duct; Provided on the inner side of the suction pipe and on the outer peripheral side and the lower side of the rotary screen and connected to the suction pipe. A fan case to be connected; and an intake fan provided inside the fan case; and the suction force of the intake fan sucks and removes dust adhering to the outer surface of the rotary screen into the intake duct; In the combine dust remover that can be discharged from the case, the intake duct is arranged in an inclined shape that moves downward as it goes from the center side to the outer peripheral side of the rotary screen.

  According to a second aspect of the present invention, the suction pipe is arranged in an inclined shape so as to move toward the outer peripheral side of the rotary screen as it goes from the suction duct side to the fan case side.

  According to a third aspect of the present invention, the actuator allows the rotary screen to be always driven to rotate.

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

  According to the first aspect, the dust sucked into the intake duct can be smoothly sent toward the fan case. Therefore, the dust discharge efficiency can be improved.

  According to the second aspect, the dust sucked into the intake duct can be more smoothly sent toward the fan case. Therefore, the dust discharge efficiency can be improved.

  According to the third aspect, the dust adhering to the outer surface of the rotary screen can be efficiently sucked into the intake duct and sent from the intake duct toward the fan case. Therefore, the dust discharge efficiency can be improved.

  Next, embodiments of the invention will be described.

  First, the whole structure of the combine 1 which has a dust removal apparatus which concerns on one Embodiment of this invention is demonstrated.

  As shown in FIGS. 1 and 2, the combine 1 has a traveling unit 3, a mowing unit 4, a threshing unit 5, a sorting unit 6, a grain storage unit 7, and a waste storage unit. A spear processing unit 8, an engine unit 9, a mission unit 10, and a control unit 11 are provided.

  The traveling unit 3 is provided in the lower part of the body frame 2. The traveling unit 3 includes a crawler type traveling device 12 having a pair of left and right crawlers, and is configured so that the body can be moved forward or backward by the crawler type traveling device 12.

  The cutting unit 4 is provided at the front end of the machine frame 2 so as to be movable up and down with respect to the machine body. The mowing unit 4 includes a weeding tool 13, a pulling device 14, a cutting device 15, a transporting device 16, and the like. It is configured to cause the cereals of the cereals to be cut, the culm after ripening is cut by the cutting device 15, and the cereals after being cut can be conveyed to the threshing unit 5 side by the conveying device 16.

  The threshing part 5 is provided at the left front part of the machine body frame 2 and is arranged behind the cutting part 4. The threshing unit 5 includes a transport device 17, a handling cylinder 18, a receiving net, and the like. The threshing unit 5 inherits the cereals that are transported from the cutting unit 4 by the transport device 17 and transports it to the waste disposal processing unit 8 side. 18 and the receiving net are configured to thresh the cereals being conveyed and allow the threshing to leak.

  The sorting unit 6 is provided on the left side of the machine body frame 2 and is disposed below the threshing unit 5. The sorting unit 6 includes a rocking sorting device, a wind sorting device, a grain conveying device, a sawdust discharging device, and the like. Swaying and sorting into dust and dust, etc., wind-sorting with the wind sorting device further into the grain and swarf and dust, etc., and grain storage after the grain selection after the grain transport device While being conveyed to the part 7 side, it is comprised so that soot waste, dust, etc. can be discharged outside by the soot waste discharging device.

  The grain storage part 7 is provided in the right rear part of the body frame 2, and is arrange | positioned at the right side of the threshing part 5 and the selection part 6. FIG. The grain storage unit 7 includes a grain tank 21, a grain discharging device 22, and the like, stores the grains conveyed from the sorting unit 6 by the grain tank 21, and is storing by the grain discharging device 22. It is comprised so that it can discharge | emit outside after conveying a grain of any direction.

  The waste disposal unit 8 is provided at the left rear portion of the machine body frame 2 and is disposed behind the threshing unit 5. The waste processing unit 8 has a waste transporting device, a waste cutting device, and the like, inherits the threshed cereals that are transported from the threshing unit 5 by the waste transporting device, and uses them as waste to the outside. It is configured so that it can be discharged or conveyed to a waste cutting device and cut by the waste cutting device and then discharged to the outside.

  The engine unit 9 is provided at the front right side of the machine body frame 2 and is disposed in front of the grain storage unit 7. The engine unit 9 includes a diesel engine 31 and the like. Power is supplied from the diesel engine 31 to each part device using the diesel engine 31 as a drive source via an appropriate power transmission mechanism, and the diesel engine 31 drives each part device. Configured to be able to.

  The mission unit 10 is provided at the front right side of the body frame 2 and is disposed in front of the engine unit 9. The transmission unit 10 has a transmission 23 and the like, and the transmission 23 shifts the power before the power of the diesel engine 31 of the engine unit 9 is supplied to each device such as the traveling unit 3 and the cutting unit 4. It is configured to be able to.

  The control unit 11 is provided at the front right side of the body frame 2 and is disposed above the engine unit 9 and the mission unit 10. The control unit 11 includes a control seat 24, operation tools including a steering handle 25, a step 26, and the like. The operator on the step 26 is seated on the control seat 24. It is configured to be able to operate the device.

  In this way, the combine 1 causes the traveling unit 3 to travel the aircraft by supplying the power of the diesel engine 31 from the engine unit 9 to the devices of the respective units by operating the operation tools in the control unit 11. However, the harvesting unit 4 harvests the cereals in the field, the threshing unit 5 threshs the cereals from the reaping unit 4, the sorting unit 6 sorts out the cereal from the threshing unit 5, and the grain storage unit 7 The grain from the sorting unit 6 is stored, and at the same time, the waste processing unit 8 can discharge the waste from the threshing unit 5 to the outside.

  Next, the configuration of the engine unit 9 will be described.

  The engine unit 9 is disposed below the control unit 11. As shown in FIGS. 3 and 4, in the engine unit 9, the diesel engine 31 is supported on the right front part of the body frame 2, and the engine room 30 is formed around the diesel engine 31. In the engine room 30, a turbocharger 35, an air cleaner 40, a DPF (Diesel Particulate Filter) 45, and the like are provided near the cylinder head 32 of the diesel engine 31.

  The supercharger 35 is provided on the front side of the cylinder head 32. The turbocharger 35 includes a compressor case 36 having a blower wheel and a turbine case 37 having a turbine wheel. The compressor case 36 is located on the right side and the turbine case 37 is located on the left side with respect to the cylinder head 32. Are arranged as follows.

  The air cleaner 40 is provided above the right rear portion of the cylinder head 32. The air cleaner 40 is connected to the intake intake side of the compressor case 36 on the intake exhaust side via an intake pipe 41, and is connected to the precleaner 42 via an intake duct 43 on the intake intake side. The pre-cleaner 42 is disposed between the control unit 11 and the grain storage unit 7 and at a position higher than the upper surface of the grain tank 21 of the grain storage unit 7.

  Further, the compressor case 36 connected to the air cleaner 40 is connected to an intake manifold 33 provided on the rear surface side of the cylinder head 32 on the intake discharge side via a supercharge pipe 44. Thus, in the intake system of the diesel engine 31, the outside air sucked into the air cleaner 40 from the precleaner 42 is purified by the air cleaner 40, and then can be supplied from the compressor case 36 to each cylinder of the diesel engine 31.

  The DPF 45 reduces particulate matter contained in the exhaust, and is provided on the left side of the cylinder head 32. The DPF 45 is connected to the exhaust discharge side of the turbine case 37 on the exhaust intake side via a front exhaust pipe 46, and connected to the exhaust intake side of the muffler 47 on the exhaust discharge side via an intermediate exhaust pipe 48. The DPF 45 is disposed at a position lower than the upper surface of the cylinder head 32 (diesel engine 31).

  The muffler 47 is provided on the rear upper side of the DPF 45. A tail pipe 49 is connected to the exhaust discharge side of the muffler 47 and is extended upward from the muffler 47 between the threshing part 5 and the grain storage part 7 and then bent and further extended backward. Is done. The tail pipe 49 is opened at a position higher than the threshing portion 5 and lower than the bleed cleaner 42 in a direction away from the pre-cleaner 42.

  The turbine case 37 connected to the DPF 45 is connected to an exhaust manifold 34 provided on the front side of the cylinder head 32 on the exhaust intake side. Thus, in the exhaust system of the diesel engine 31, the exhaust gas discharged from each cylinder of the diesel engine 31 to the exhaust manifold 34 is purified by the DPF 45 via the turbine case 37, and then the tail pipe via the muffler 47. 49 can be discharged to the outside.

  Further, in the engine room 30, as shown in FIGS. 5 and 6, a radiator 51 is provided on the right side of the diesel engine 31 in the right direction, and a cooling fan 52 is provided between the diesel engine 31 and the radiator 51. Provided. The cooling fan 52 is supported by an output shaft 38 that protrudes rightward from the diesel engine 31, and can be driven to rotate by the diesel engine 31.

  An engine cover 55 is provided on the right side of the radiator 51. As shown in FIG. 7, the engine cover 55 is formed of a hollow casing. As shown in FIG. In accordance with the shape of the step-like boarding / alighting step 28, the front upper part of the outer peripheral edge is formed into a curved shape, and the front lower side is projected forward to form a narrow upper and lower wide.

  In addition, the engine cover 55 is extended rearward so that there is substantially no gap between the engine cover 55 and the grain tank 21 when viewed from the right side, and is formed so that the surface area of the right outer side is as large as possible. The engine cover 55 is supported by a support frame erected from the body frame 2 on the rear side of the outer peripheral edge portion so as to be rotatable in a horizontal direction via a support shaft 54, and can be moved to a closed position or an open position. The In the closed position, the engine cover 55 faces the radiator 51, and is arranged so that the right outer surface is positioned substantially on the same surface as the right outer surface of the control unit 11.

  Thus, when the engine cover 55 is in the closed position, the engine cover 55 covers the diesel engine 31 and the radiator 51, and the engine room 30 is closed from the right outer side. On the other hand, when the engine cover 55 is rotated from the closed position to the right outer side to the open position, the engine cover 55 does not cover the diesel engine 31 and the radiator 51, and the engine room 30 is opened.

  As shown in FIGS. 5 and 6, locking means 56 is provided between the engine cover 55 and the airframe. The lock means 56 includes a hook 57 with an operation lever, a lock pin 58, and the like. The hook 57 with an operating lever is supported by a lower part of the front surface of the engine cover 55 in the middle of the upper and lower sides via a support shaft 59 so as to be swingable. The lock pin 58 is provided in front of the engine cover 55 so as to protrude rearward at the boarding step 28 on the airframe side.

  Then, the hook 57 with the operating lever is swung to engage with or disengage from the lock pin 58. Note that the hook 57 with the operating lever is urged by the urging member so that the engaged state is maintained when engaged with the lock pin 58.

  Thus, when the hook 57 with the operation lever is engaged with the lock pin 58, the engine cover 55 is locked in the closed position, and the engine room 30 is held in the closed state. In this state, when the hook 57 with the operation lever is detached from the lock pin 58, the engine cover 55 can be rotated rightward, and the engine room 30 can be opened by the rotation.

  As shown in FIGS. 8 to 11, the engine cover 55 is provided with an outside air inlet 60 of the engine unit 9 as an opening for taking outside air for cooling the engine into the engine room 30 as cooling air. The outside air intake 60 of the engine unit 9 includes a first outside air inlet 61 provided on the right outside surface of the engine cover 55 that is a hollow casing, and a second outside air inlet 62 provided on the left inside surface. Thus, the first outside air inlet 61 and the second outside air inlet 62 are juxtaposed in the left-right direction.

  The first outside air inlet 61 is formed in a circular shape at a substantially central portion of the right outer surface of the engine cover 55 and is opened to face the outside. The second outside air inlet 62 is formed in a square shape at the lower part of the left inner surface of the engine cover 55 and is opened to face the radiator 51 of the engine room 30 when the engine cover 55 is in the closed position. The first outside air inlet 61 and the second outside air inlet 62 are arranged so as to partially face each other.

  In this way, when the engine cover 55 is penetrated in the left-right direction at the outside air intake 60 and the outside air for engine cooling is driven to rotate in the engine room 30 by the cooling fan 52, the outside air of the engine unit 9 is drawn by the suction force. The intake port 60, that is, the first outside air inlet 61 and the second outside air inlet 62 is introduced into the engine room 30 and sent to the diesel engine 31.

  Here, as described above, the engine cover 55 is sized so that there is substantially no gap between the grain tank 21 and the front and rear direction, and the surface area of the right outer surface is enlarged compared to the conventional one. As a result, the outside air inlet 60 of the engine unit 9, particularly the first outside air inlet 61 among them, is opened with an opening area that is as large as possible with respect to the surface area of the right outer surface of the engine cover 55. Is increased.

  As shown in FIG. 5 to FIG. 7, a dust removal device 70 that prevents the dust from being taken into the engine room 30 together with the outside air for cooling the engine is provided in the engine cover 55 and its peripheral portion below the control unit 11. . The dust removing device 70 includes a rotary screen 71, a motor 80 as an actuator, an intake duct 85, a shielding plate 105, an intake pipe 101, a fan case 90, and an intake fan 94.

  As shown in FIGS. 8 to 11, the rotary screen 71 has a hub 72, a spoke 73, a rim 74, a dust removal net 75, etc., and the hub 72, the spoke 73, and the rim 74 form a wheel shape. The frame is formed, and a circular dust net 75 is stretched around the right outer surface of the frame. The rotary screen 71 is provided on the right outer side of the engine cover 55.

  Specifically, the rotary screen 71 is disposed so as to cover the first outside air intake 61 from the right outer side, and is horizontally supported by the support frame 76 that is obliquely provided in the diametrical direction by the hub 72 to the first outside air intake 61. Is supported rotatably via the support shaft 77. Further, a driven gear 78 is supported on the support frame 76 via a support shaft 77 between the support frame 76 and the hub 72 so as to be rotatable with the rotary screen 71.

  A bracket 79 is provided in the middle of the support frame 76 so as to protrude obliquely upward, and a motor 80 is provided on the protrusion of the bracket 79. A drive gear 82 is fixed to the output shaft 81 of the motor 80, and the drive gear 82 and the driven gear 78 on the support shaft 77 are meshed with each other. Thus, the rotary screen 71 can be rotated via the drive gear 82, the driven gear 78, and the support shaft 77 when the motor 80 is driven.

  The motor 80 is connected to, for example, a control device provided at an arbitrary position of the machine body, and is controlled by the control device so as to be driven or stopped in conjunction with driving or stopping of the diesel engine 31 and each device of the cutting unit 4. . At the time of this control, the motor 80 is controlled not to be intermittently driven but to be constantly driven, and at the same time, to be driven at a lower speed than when controlled to be intermittently driven.

  A brush-like seal member 83 is provided along the circumferential direction of the first outside air inlet 61 on the outer periphery of the first outside air inlet 61 of the engine cover 55, and slides on the left inner surface of the rim 74 of the rotary screen 71. Touched. In this way, the gap between the rotary screen 71 and the engine cover 55 is closed by the seal member 83, and dust can be prevented from entering the engine room 30 through this gap.

  As described above, the engine cover 55 is provided so that the surface area of the right outer surface thereof is as large as possible. Therefore, in the engine cover 55, the outside air inlet 60 (first outside air inlet 61) of the engine unit 9 and the rotary screen 71 also have a surface area on the right outer surface as large as possible, and as much as possible with respect to the traveling unit 3. It is provided to be at a high position.

  The intake duct 85 is formed in a cylindrical shape so as to be substantially U-shaped in cross section. The intake duct 85 is provided on the right outer side of the rotary screen 71, and is disposed with the open-side intake port 86 facing the rotary screen 71. At this time, a gap having a predetermined width is formed between the open end face of the intake duct 85 and the right outer surface of the rotary screen 71 so that dust attached to the rotary screen 71 can pass therethrough.

  The intake duct 85 extends in the radial direction of the rotary screen 71 between the center portion and the vicinity of the outer peripheral portion of the rotary screen 71, and is supported by the support shaft 77 at one end portion and the engine cover 55 at the other end portion. Supported by the front and bottom. In this way, the intake duct 85 is disposed on the right outer surface of the rotary screen 71 in an inclined shape with a low height before and after it gradually decreases from one end side toward the other end side, which is the dust discharge side. That is, the intake duct 85 is arranged in an inclined shape that moves downward as it goes from the center side of the rotary screen 71 toward the outer peripheral side.

  As shown in FIGS. 5 and 6, the fan case 90 is provided on the inner side of the suction pipe 101 and on the outer peripheral side and lower side of the rotary screen 71, that is, on the front lower side. The fan case 90 is disposed inside the front lower portion of the engine cover 55 and in front of the radiator 51 and the cooling fan 52, and is supported by the right front portion of the body frame 2.

  The rear part of the fan case 90 is extended upward. A suction port 91 is provided on the extended upper portion so as to face right, and is opened so as to face the left inner surface of the front lower portion of the engine cover 55. On the other hand, a discharge port 92 is provided at the front lower portion of the fan case 90 so as to face downward and open so as to face the front lower side of the crawler type traveling device 12 at a position higher than the body frame 2.

  The intake fan 94 is provided inside the fan case 90 and is rotatably supported via the fan case 90 via a driven shaft 95. The driven shaft 95 is connected to a drive shaft 39 that protrudes rightward from the diesel engine 31 by a belt-type power transmission mechanism 97. Thus, the intake fan 94 can be driven to rotate via the belt-type power transmission mechanism 97 when the diesel engine 31 is driven.

  As shown in FIGS. 8 to 11, the suction pipe 101 is provided in the front lower portion of the engine cover 55 so as to penetrate in the left-right direction from the right outer surface to the left inner surface. The suction pipe 101 extends in a substantially horizontal direction between the intake duct 85 and the fan case 90, is connected to the other end of the intake duct 85 at one end, and is connected to the rear upper part of the fan case 90 at the other end. A communication connection is established via the suction port 91.

  Here, the suction pipe 101 is disposed in an inclined shape such that the connection portion with the fan case 90 is located in front of the connection portion with the intake duct 85. That is, the suction pipe 101 is disposed in an inclined shape that moves forward from the intake duct 85 side to the fan case 90 side, in other words, from the right outer side to the left inner side, inside the front lower portion of the engine cover 55.

  The shielding plate 105 is provided on the opposite side of the rotary screen 71 of the intake duct 85, that is, on the inner side of the rotary screen 71, at a position facing the intake port 86 of the intake duct 85, and closer to the front of the support frame 76. Supported. The shielding plate 105 is larger than the intake port 86 so that the suction force of the intake fan 94 is not affected by the suction force of the cooling fan 52 inside the intake duct 85.

  The shielding plate 105 is disposed in an inclined manner along the support frame 76, so that the rigidity of the support frame 76 and the engine cover 55 that obliquely installs the support frame 76 can be improved. Thereby, even if the outside air intake port 60 of the engine unit 9 has an opening area as large as possible, the rotary screen 71 and the motor 80 can be firmly supported via the support frame 76.

  With such a configuration, when the diesel engine 31 is driven and the cooling fan 52 is driven to rotate, the engine cooling outside air flows into the outside air intake 60 of the engine cover 55, that is, the first outside air intake 61 and the second outside air. The air is sucked from the intake port 62 toward the engine room 30, and dust contained therein is removed by the driven dust removing device 70 when passing through the first outside air intake port 61. The purified outside air is sent to the radiator 51 and the diesel engine 31 as cooling air.

  At this time, in the dust removing device 70, the rotating rotary screen 71 adheres dust contained in the outside air, and the intake fan 94 is rotationally driven to generate a negative pressure inside the intake duct 85 and the intake pipe 101. It will be. As a result, the dust adhering to the portion of the rotating rotary screen 71 facing the shielding plate 105 is sucked into the intake duct 85 from the intake port 86 and then sent to the fan case 90 through the intake pipe 101. It is included in the exhaust air from the discharge port 92 and is discharged to the vicinity of the front lower side of the crawler type traveling device 12.

  Here, dust adhering to the rotating rotary screen 71 is removed as needed because the rotary screen 71 is always driven by the motor 80. Therefore, clogging of the rotary screen 71 with the dust removal net 75 is prevented, and the outside air is continuously purified. Therefore, the outside air purified by the dust removing device 70 is sufficiently taken into the engine room 30 and supplied so that the outside air necessary for cooling the radiator 51 and the diesel engine 31 is not insufficient.

  As described above, the dust removing device 70 of the combine 1 according to the embodiment of the present invention, that is, the dust removing rotary screen 71 that is provided in the outside air intake port 60 of the engine unit 9 and allows dust to adhere to the outer surface, A motor 80 is provided on the inner side of the rotary screen 71 to enable the rotary screen 71 to be driven to rotate, and is provided with an intake port 86 facing the outer surface of the rotary screen 71. An intake duct 85 that extends from the section side toward the outer peripheral side, a shield plate 105 that is provided on the inner side of the rotary screen 71 and that is disposed opposite the intake duct 85 across the rotary screen 71, and the rotary screen 71. It is provided on the outer peripheral side and on the inner side of the intake duct 85, and communicated with the intake duct 85. An intake pipe 101, a fan case 90 provided inside the intake pipe 101 and on the outer periphery and below the intake duct 85 and connected to the intake pipe 101, and an intake fan 94 provided inside the fan case 90. In the dust removing device 70 of the combine 1, which is equipped with the suction force of the suction fan 94, the dust attached to the outer surface of the rotary screen 71 is sucked into and removed from the suction duct 85 and can be discharged from the fan case 90. 85 is arranged in an inclined shape that moves downward as it goes from the central portion side to the outer peripheral side of the rotary screen 71. Thereby, when the dust removing device 70 is driven, the dust sucked into the intake duct 85 is smoothly sent toward the fan case 90. Therefore, the dust discharge efficiency can be improved.

  Further, in such a dust removing device 70, the suction pipe 101 is disposed in an inclined shape so as to shift to the front (outer peripheral side) of the rotary screen 71 as it goes from the intake duct 85 side to the fan case 90 side. Thereby, when the dust removing device 70 is driven, the dust sucked into the intake duct 85 is sent more smoothly toward the fan case 90. Therefore, the dust discharge efficiency can be improved.

  Further, in such a dust removing device 70, a motor 80 as an actuator is configured so that the rotary screen 71 can always be driven to rotate. As a result, when the dust removing device 70 is driven, dust adhering to the outer surface of the rotary screen 71 is sucked into the intake duct 85 more efficiently than when the motor 80 is controlled to intermittently drive. It is sent from the duct 85 toward the fan case 90. Therefore, the dust discharge efficiency can be improved.

  Moreover, in such a dust removal apparatus 70, it controls so that it drives at low speed compared with the case where the motor 80 is controlled to drive intermittently. As a result, it takes a long time for a part of the rotating rotary screen 71 to face the intake duct 85, and when the dust remover 70 is driven, dust adhering to the outer surface of the rotary screen 71 is efficiently sucked into the intake duct 85. Thus, the air is sent from the intake duct 85 toward the fan case 90. Therefore, the dust discharge efficiency can be improved.

  In such a dust removing device 70, the outside air inlet 60 (first outside air inlet 61) of the engine unit 9 and the rotary screen 71 are provided so that the surface area of the right outer surface is as large as possible. As a result, when outside air is taken as cooling air from the outside air inlet 60 into the engine room 30, the wind speed when passing through the rotary screen 71 is reduced. Therefore, it is possible to suppress adhesion of a large lump of dust that is likely to be clogged to the rotary screen 71.

  Further, in such a dust removing device 70, the outside air inlet 60 (first outside air inlet 61) of the engine unit 9 and thus the rotary screen 71 are provided as high as possible with respect to the traveling unit 3. As a result, when outside air is taken into the engine room 30 from the outside air inlet 60 as cooling air, it becomes difficult for dust to adhere to the rotary screen 71. Therefore, the adhesion rate of dust to the rotary screen 71 can be reduced.

The left view which shows the whole structure of the combine which has a dust removal apparatus which concerns on one Embodiment of this invention. The right view which shows the whole structure of the combine which has a dust removal apparatus which concerns on one Embodiment of this invention. The front view which shows the structure of an engine part. The top view which shows the structure of an engine part. The top view which shows the structure of dust removal apparatus vicinity. The front view which shows the structure of dust removal apparatus vicinity. The right view which shows the structure of dust removal apparatus vicinity. The left view which shows the structure of an engine cover provided with a part of dust removal apparatus. The left view which shows the structure inside an engine cover provided with a part of dust removal apparatus. The partial cross section right view which shows the structure of an engine cover provided with a part of dust removal apparatus. The cross-sectional top view which shows the structure of an engine cover provided with a part of dust removal apparatus.

Explanation of symbols

1 Combine 9 Engine part 60 Outside air intake 70 Dust remover 71 Rotary screen 80 Motor (actuator)
85 Intake duct 86 Intake port 90 Fan case 94 Intake fan 101 Intake pipe 105 Shield plate

Claims (3)

A rotary screen for dust removal that is provided at the outside air intake port of the engine unit and allows dust to adhere to the outer surface;
An actuator provided on the inner side of the rotary screen and capable of rotating the rotary screen;
An intake duct that is provided with an intake port facing the outer surface of the rotary screen, and that extends from the center side of the rotary screen toward the outer peripheral side;
A shielding plate provided on the inner side of the rotary screen and disposed opposite to the intake duct across the rotary screen;
A suction pipe provided on the outer peripheral side of the rotary screen and on the inner side of the intake duct, and connected to the intake duct;
A fan case that is provided on the inner side of the suction pipe and on the outer circumferential side and the lower side of the rotary screen and is connected to the suction pipe;
An intake fan provided inside the fan case,
In the dust remover for a combine, wherein the suction force of the intake fan sucks and removes dust adhering to the outer surface of the rotary screen into the intake duct and can be discharged from the fan case.
The dust remover for a combine according to claim 1, wherein the intake duct is disposed in an inclined shape so as to move downward as it goes from the central portion side to the outer peripheral side of the rotary screen.   The combine dust removing device according to claim 1, wherein the suction pipe is disposed in an inclined shape so as to move toward the outer peripheral side of the rotary screen from the intake duct side toward the fan case side.   The combine dust removing device according to claim 1 or 2, wherein the actuator is capable of always rotating the rotary screen.

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