JP2011201487A - Duster of engine cover in combine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve dusting effect of a dust prevention net by sending air to the dust prevention net even in the center of a dusting axial-flow fan.SOLUTION: In a combine 1, a cooling fan 13 of an engine 12 is provided so as to such the outside air through the dust prevention net 11c provided in an engine cover 11, the dusting axial-flow fan 19 capable of sending the air toward the dust prevention net 11c is provided between the dust prevention net 11c and the cooling fan 13, and the dusting axial-flow fan 19 is operated in such a state that the cooling fan 13 is stopped so as to blow off the dust attached to the outside of the dust prevention net 11c. The combine is equipped with a wind guide member 25 for guiding the air generated by the dusting axial-flow fan 19 at the downstream side of the dusting axial-flow fan 19 to the center of the dusting axial-flow fan 19.

Description

  The present invention relates to a dust removal device for an engine cover in a combine equipped with an axial fan for dust removal that blows away dust attached to the outside of a dust screen.

  A cooling fan for the engine is provided so as to suck in the outside air through a dust-proof net provided in the engine cover, and an axial fan for dust removal that can blow air toward the dust-proof net is provided between the dust-proof net and the cooling fan to cool the engine. There is known a combine that blows away dust adhering to the outside of a dustproof net by operating a dust removing axial flow fan in a state where the fan is stopped (see, for example, Patent Documents 1 and 2).

No. 7-16028 JP-A-2005-153643

  However, in the axial fan for dust removal, since wind does not occur at the center of the fan, there is a problem in that dust is not removed in the area facing the fan center in the dust-proof net and dust remains.

The present invention was created with the object of solving these problems in view of the above circumstances, and provided with an engine cooling fan so as to suck in outside air through a dust-proof net provided in the engine cover. A dust-removing axial fan that can blow air toward the dust-proof mesh is provided between the dust-proof mesh and the cooling fan, and the dust-removing axial fan is operated while the cooling fan is stopped. In the combine that blows away the dust adhering to the dust, an air guide member is provided on the downstream side of the dust removing axial fan to guide the wind generated by the dust removing axial fan to the center side of the dust removing axial fan. Features.
Further, the air guide member is fixed to a support member of a dust removing axial flow fan.
The air guide member is composed of a plurality of curved plates, and a dust removing axial fan support member, a fan fixing portion to which the dust removing axial fan is fixed, and the fan fixing portion supported by the engine cover. The one end of the curved plate is fixed to the fan fixing portion or the fan fixing portion side of the leg portion, while the other end of the bending plate is fixed to the side opposite to the fan fixing portion of the leg portion. It is characterized by being fixed.

According to the first aspect of the present invention, since the wind guide member for guiding the wind generated by the dust removing axial fan to the center side of the dust removing axial fan is provided on the downstream side of the dust removing axial fan, the dust removing Even on the center side of the axial flow fan, it is possible to blow air toward the dustproof net and blow off the dust attached to the outside of the dustproof net.
According to the invention of claim 2, since the air guide member is fixed to the support member of the dust removing axial flow fan, the structure is simplified and the number of parts is reduced compared to the case where the support member of the air guide member is separately provided. Reduction can be achieved.
According to the invention of claim 3, the plurality of curved plates constituting the air guide member can be fixed using the fan fixing portion and the leg portion provided in the support member of the dust removing axial flow fan.

It is a whole right side view of a combine. It is a right view of an engine part. It is a front view of an engine part. It is a top view of the engine part which shows the effect | action of a shroud. It is explanatory drawing when there is no shroud, (A) is a principal part right view of an engine part, (B) is a principal part top view of an engine part. It is a right view of the engine part which shows the state which opened the engine cover. It is a right view of a dust remover. It is a perspective view of a dust remover. It is a disassembled perspective view of a dust remover. It is a right view which shows the cooling fan clutch of a clutch-engaged state. It is a right view which shows the cooling fan clutch of a clutch disconnection state. It is a left view of a clutch drive part. It is a top view of a clutch drive part. It is a back perspective view of an engine part. It is a back principal part expansion perspective view of an engine part. It is a figure which shows 2nd embodiment, and is a right view of the engine part which shows the state which opened the engine cover. It is a figure which shows 3rd embodiment and is a right view of an engine part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a combine. The combine 1 includes a pre-processing unit 2 that cuts stem stalks, a threshing unit (not shown) that threshs and sorts grains from the harvested stalks, and a selected grain. A grain tank 3, a post-processing unit 4 for post-processing threshing waste, an operation unit 6 on which a driver's seat 5 and various operation tools are arranged, a crawler type traveling unit 7, and the like. Has been.

  As shown in FIGS. 1 to 6, an engine unit 9 is configured below the driving frame 8 that supports the driver's seat 5. The engine unit 9 includes an engine room 10 having left and right side openings, and an engine cover 11 that covers the right side opening of the engine room 10 so as to be freely opened and closed. The engine cover 11 of the present embodiment is a single door that opens and closes outward from the machine body with a hinge 11a at the rear end as a pivot, and is configured by a dust frame 11c stretched around a door frame 11b.

  In the engine room 10, there are an engine 12, a cooling fan 13 that rotates with the power of the engine 12 and sucks outside air through the dust-proof net 11 c, and a cooling fan clutch 14 that turns on and off the power transmission to the cooling fan 13; A radiator 15 disposed outside the cooling fan 13, a cooling shroud 16 that blocks cooling air escaping around the radiator 15, an oil cooler 17 disposed outside the radiator 15, and the oil cooler 17 A dust removing device 18 disposed between the dust nets 11c is provided.

  The dust removing device 18 is a device for removing debris adhering to the outside of the dust-proof net 11c as the outside air is sucked in by the cooling fan 13, and specifically, can blow air from the inside of the dust-proof net 11c toward the outside. A dust removal axial flow fan 19 is provided, and the dust removal axial flow fan 19 is operated in a state where the cooling fan 13 is stopped, so that dust attached to the outside of the dustproof net 11c is blown away.

  However, in the conventional dust removing device, as shown in FIG. 5, when the dust removing axial fan 19 is operated, the dust removing axial fan 19 is disposed upstream of the space between the dust removing axial fan 19 and the dust net 11c. Since the suction air that circulates is generated, on the outer peripheral side of the dust removal axial flow fan 19, the air is not blown toward the dust-proof net 11 c, and conversely, the outside air is sucked. There was a problem that dust was removed, dust was not removed on the outer peripheral side, and debris remained.

  Therefore, the dust removing device 18 according to the embodiment of the present invention wraps around the upstream side of the dust removing axial fan 19 from the space between the dust removing axial fan 19 and the dust net 11c when the dust removing axial fan 19 is operated. A dust removal shroud 20 is provided to block suction air. In this way, as shown in FIG. 4, when the dust removal axial fan 19 is in operation, the suction air that circulates to the upstream side of the dust removal axial fan 19 from the space between the dust removal axial fan 19 and the dust net 11c. Is blocked, air can be blown toward the dust-proof net 11c even on the outer peripheral side of the dust removal axial flow fan 19. As a result, not only the fan facing area in the dust-proof net 11c but also the wide area of the dust-proof net 11c. It becomes possible to perform dust removal in a range.

  The dust removal shroud 20 of the present embodiment extends in a trumpet shape from the cylindrical portion 20a surrounding the outer periphery of the dust removal axial flow fan 19 and the dustproof mesh side end of the cylindrical portion 20a toward the dustproof mesh 11c. The expansion part 20b which extends the ventilation range of the axial fan 19 is comprised.

  The dust removal shroud 20 preferably covers at least approximately half of the dust net 11c. For example, the dust removal shroud 20 of the present embodiment is arranged so as to cover the lower half of the dust net 11c, as shown in FIG. In this way, dust can be periodically removed in at least approximately half the area of the dust screen 11c, so that it is possible to suppress a decrease in cooling efficiency of the engine 12 due to clogging of the dust screen 11c.

  As shown in FIGS. 7-9, the dust-removal axial fan 19 of the present embodiment is an electric fan including a fan 19a and an electric motor 19b that rotates the fan 19a. As shown in FIG. It is fixed to the fan support member 22 using a fan fixing nut 21. Further, the fan support member 22 is fixed to the engine cover 11 together with the dust removal shroud 20 by using a shroud fixing bolt 24 in a state of being sandwiched between the dust screen 11 c and the dust removal shroud 20. In this way, by opening the engine cover 11, the dust removing axial flow fan 19 and the dust removing shroud 20 can be moved to the outside of the machine body, so that they can be easily maintained. In addition, the member shown with the code | symbol S in FIG. 9 is the sealing material which airtightly block | closes the clearance gap between the dust removal shroud 20 and the dust net 11c.

  Further, in the conventional dust removing device, as shown in FIG. 5, due to the fact that no wind is generated on the center side of the dust removing axial flow fan 19, sufficient dust removal is performed in the area facing the fan center portion in the dust net 11c. There was a problem that scrap was left without being performed.

  Therefore, in the dust removing device 18 according to the embodiment of the present invention, the wind that is generated by the dust removing axial fan 19 is guided downstream of the dust removing axial fan 19 to the center side of the dust removing axial fan 19. A wind member 25 is provided. In this way, as shown in FIG. 7, since the wind can be guided to the center side of the dust removal axial flow fan 19 and the air can be blown from the fan center toward the dust net 11c, the fan center in the dust net 11c Effective dust removal can be performed even in a region facing the part.

  As shown in FIGS. 7 to 9, the air guide member 25 is preferably fixed to the fan support member 22 that supports the dust-removal axial fan 19. In this case, the structure can be simplified and the number of parts can be reduced as compared with the case where a support member for the air guide member 25 is provided separately.

  The air guide member 25 of the present embodiment is composed of a plurality of curved plates 25a, and each curved plate 25a is fixed to the fan support member 22 in an independent state. Here, the fan support member 22 of the present embodiment includes a fan fixing portion 22a to which the dust removing axial flow fan 19 is fixed, a cover fixing portion 22b to be fixed to the engine cover 11, and a radial direction from the fan fixing portion 22a. And a plurality of leg portions 22c integrally connected to the cover fixing portion 22b. Each curved plate 25a has one end fixed to the fan fixing portion side of the fan fixing portion 22a or the leg portion 22c, and the other end fixed to the side opposite to the fan fixing portion side of the adjacent leg portion 22c. The If it does in this way, it will become possible to fix the some curved plate 25a which comprises the air guide member 25 using the fan fixing | fixed part 22a and the leg part 22c with which the fan support member 22 is provided.

  In the dust removing device 18 of the present embodiment, the number of the leg portions 22c and the number of the curved plates 25a are the same. If it does in this way, since it will become possible to arrange | position the curved plate 25a of the same shape at equal intervals with sufficient balance, not only can the cost of the air guide member 25 be reduced, but also the rigidity of the fan support member 22 should be made uniform. Can do.

  Next, the cooling fan clutch 14 of this embodiment is demonstrated with reference to FIGS. As shown in these drawings, a crank pulley 26 connected to a crankshaft (not shown) and a fan pulley 27 arranged above the crankshaft 26 are provided on the right side of the engine 12. In the meantime, the fan belt 28 is suspended. The fan pulley 27 is integrally connected to the cooling fan 13, and rotates the cooling fan 13 with power transmitted from the crank pulley 26 to the belt. Further, an alternator pulley 29 is disposed behind the fan pulley 27, and the alternator 31 is rotationally driven by the power transmitted from the crank pulley 26 to the alternator pulley 29 via the belt 30. Yes.

  The cooling fan clutch 14 is a belt tension clutch that interrupts power transmission to the fan pulley 27 by loosening the fan belt 23, and supports a tension pulley 32 that contacts the fan belt 23 and the tension pulley 32 so as to be able to advance and retract. A tight arm 33 that urges the tight arm 33 in the clutch engagement direction, and a clutch drive motor 36 that operates the tight arm 33 in the clutch disengagement direction via the clutch drive wire 35. ing.

  The clutch drive motor 36 is attached to the motor bracket 37 and is disposed at the rear end of the engine room 10. As shown in FIGS. 14 and 15, the rear end portion of the engine room 10 is a releasable portion, and the maintenance performance of the clutch drive motor 36 is ensured by arranging the rear portion thereof. In order to open the arrangement part of the motor bracket 37, first, the grain tank 3 arranged behind the engine unit 9 is rotated outwardly from the rear end side as a fulcrum, and the rear side of the engine unit 9 is moved. Open. Next, the engine back cover 38 covering the back of the engine room 10 and the cooling shroud 16 described above are removed, so that the arrangement portion of the motor bracket 37 is opened.

  The motor bracket 37 is provided with a tension adjustment mechanism 39, and the base end side of the tension spring 34 is connected via the tension adjustment mechanism 39. In this way, by providing the tension adjusting mechanism 39 and the tension spring 34 on the motor bracket 37 that ensures maintenance, it is possible to improve maintenance.

  The tension adjusting mechanism 39 is a mechanism that adjusts the tension of the fan belt 28 when the clutch is engaged based on changing the base end position of the tension spring 34. The tension adjusting mechanism 39 is a tension to which the base end of the tension spring 34 is connected. An adjustment arm 40 is provided.

  The tension adjustment arm 40 is provided on the motor bracket 37 so as to be able to rotate back and forth via a rotation fulcrum bolt 41, and the base end position of the tension spring 34 can be changed according to the rotation. Further, the tension adjustment arm 40 is provided with a rotation fixing bolt 42 for fixing the rotation of the tension adjustment arm 40 at an arbitrary rotation position. The rotation fixing bolt 42 is inserted into a long hole 37a (an arc-shaped long hole centered on the rotation fulcrum bolt 41) formed in the motor bracket 37, and the tension adjustment arm 40 is attached to the motor bracket 37 by tightening the bolt. It is designed to be fixed so that it cannot rotate. According to such an arm type tension adjusting mechanism 39, a space required in the tensioning direction of the tension spring 34 can be reduced as compared with a bolt adjuster type tension adjusting mechanism provided in an extending shape in the tensioning direction of the tension spring 34. Can do.

  In configuring the arm-type tension adjusting mechanism 39, in this embodiment, an extension is formed on the distal end side of the tension adjusting arm 40, and the extension is used as a handle 40a. In this way, the tension adjustment arm 40 can be held at an arbitrary rotation position by gripping the handle portion 40a during tension adjustment, so that the rotation fixing bolt 42 can be easily loosened or tightened. Further, when the tension is adjusted, the rotation range of the tension adjustment arm 40 is limited by the long hole 37a. Therefore, the tension adjustment arm 40 is temporarily held at the initial rotation position on the belt loosening side, and then the tension adjustment is performed. Assembling performance can be improved by combining the processes.

  The tension adjustment mechanism 39 of the present embodiment is provided with a stopper bolt 43 that can restrict the rotation of the tension adjustment arm 40 toward the belt loosening side at an arbitrary rotation position. The stopper bolt 43 is provided on the motor bracket 37 so that the front and rear positions can be adjusted. The bolt head at the rear end abuts the tension adjusting arm 40 from the belt loosening side, so that the tension adjusting arm 40 moves toward the belt loosening side. The rotation is restricted. In this way, even if the rotation fixing bolt 42 is loosened, the rotation position of the tension adjustment arm 40 can be maintained. Therefore, the rotation of the tension adjustment arm 40 associated with the loosening of the rotation fixing bolt 42 causes the fan belt. The problem of 28 tension failure can be solved.

  In this embodiment, when the stopper pin 44 with which the stopper bolt 43 abuts is provided on the tension adjustment arm 40, the stopper pin 44 is also used as a mounting pin for the tension spring 34. In this way, the number of parts can be reduced and the structure can be simplified. Further, the stopper bolt 43 and the stopper pin 44 are set so that the stopper bolt 43 and the stopper pin 44 are in contact with each other in the entire rotation range of the tension adjusting arm 40 defined by the long hole 37a. Thereby, in all the tension adjustment ranges, the rotation of the tension adjustment arm 40 accompanying the loosening of the rotation fixing bolt 42 can be restricted.

  According to the present embodiment configured as described, the cooling fan 13 of the engine 12 is provided so as to suck in the outside air through the dust net 11 c provided in the engine cover 11, and between the dust net 11 c and the cooling fan 13. The dust removal axial flow fan 19 capable of blowing air toward the dust prevention screen 11c is provided, and the dust removal axial flow fan 19 is operated in a state where the cooling fan 13 is stopped. In the combine 1 that blows away the dust, since the air guide member 25 that guides the wind generated by the dust removal axial fan 19 to the center side of the dust removal axial fan 19 is provided downstream of the dust removal axial fan 19. Even on the center side of the dust removal axial flow fan 19, it is possible to blow air toward the dust screen 11c and blow off the dust attached to the outside of the dust screen 11c.

  In this embodiment, since the air guide member 25 is fixed to the fan support member 22 of the dust-removal axial fan 19, simplification of the structure and the number of parts compared to the case where the support member of the air guide member 25 is provided separately. Can be reduced.

  In the present embodiment, the air guide member 25 is composed of a plurality of curved plates 25a, and the fan support member 22 of the dust removing axial fan 19 is fixed to the fan fixing portion 22a to which the dust removing axial fan 19 is fixed. And a plurality of leg portions 22c that support the fan fixing portion 22a with the engine cover 11, and one end of the bending plate 25a is fixed to the fan fixing portion 22a or the fan fixing portion side of the leg portion 22c. Since the other end of the plate 25a is fixed to the side opposite to the fan fixing portion side of the leg portion 22c, the fan support member 22 of the dust-removing axial fan 19 is connected to the plurality of curved plates 25a constituting the air guide member 25. It can fix using the fan fixing | fixed part 22a and the leg part 22c with which it is equipped.

  Needless to say, the present invention is not limited to the above-described embodiment, and can be arbitrarily changed without departing from the scope of the claims.

  For example, since the combine of the above embodiment does not include a cabin, the engine room 10 does not include the condenser 50 and the receiver dryer 51 that are required for air conditioning of the cabin, but as in the second embodiment illustrated in FIG. When the condenser 50 and the receiver dryer 51 are provided in the engine room 10, it is preferable that the arrangement configuration is such that the overlapping range of the dust removing device 18 and the condenser 50 in the right side view of the body is as small as possible. For example, the capacitor 50 is disposed on the upper side, and the dust removing device 18 is disposed on the lower side. In this way, dust can be removed from the dust-proof net 11c in a wide range that does not overlap with the capacitor 50, so that the cooling air intake efficiency can be increased and the cooling efficiency of the engine 12 can be increased.

  Moreover, in the said embodiment, although the dust removal apparatus 18 was provided in the lower half of the dust prevention net | network 11c, the dust removal apparatus 18 is provided also in the upper half of the dust prevention net | network 11c like 3rd embodiment shown in FIG. It is also possible to perform dust removal over the entire area of the dust screen 11c.

DESCRIPTION OF SYMBOLS 1 Combine 9 Engine part 10 Engine room 11 Engine cover 11c Dust removal net | network 12 Engine 13 Cooling fan 14 Cooling fan clutch 18 Dust removal apparatus 19 Dust removal axial flow fan 20 Dust removal shroud 22 Fan support member 22a Fan fixing part 22c Leg part 25 Wind guide Member 25a Curved plate

Claims (3)

A cooling fan for the engine is provided so as to suck in the outside air through a dust-proof net provided in the engine cover, and an axial fan for dust removal that can blow air toward the dust-proof net is provided between the dust-proof net and the cooling fan to cool In a combine that blows away debris adhering to the outside of the dust net by operating the dust removal axial flow fan with the fan stopped,
Dust removal for an engine cover in a combine, characterized in that a wind guide member is provided on the downstream side of the dust removal axial flow fan to guide the wind generated by the dust removal axial flow fan to the center side of the dust removal axial flow fan. apparatus.   2. The dust removing device for an engine cover in a combine according to claim 1, wherein the air guide member is fixed to a support member of a dust removing axial flow fan.   The air guide member is composed of a plurality of curved plates, and the support member of the dust-removing axial fan is a fan fixing portion to which the dust-removing axial fan is fixed, and the fan fixing portion is supported by the engine cover. The one end of the curved plate is fixed to the fan fixing portion or the fan fixing portion side of the leg portion, and the other end of the bending plate is fixed to the opposite side of the leg portion from the fan fixing portion. The dust remover for an engine cover in a combine according to claim 2.