JP2007151455A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an engine-cooling air in a hot air state from hitting an operator under operation of manual threshing in a combine harvester discharging the engine-cooling air caused by a cooling fan to a threshing part side. <P>SOLUTION: The combine harvester 1 discharging the engine-cooling air caused by the cooling fan 8 to a threshing part 3 side judges the manual threshing operation state of the combine harvester 1, and when judged as the manual threshing operation state, the discharge of the engine-cooling air to the threshing part 3 is restricted. Concretely, when a manual threshing switch 42 installed in the threshing part 3 is operated, or an implement clutch for putting on or off a threshing power is in the on-state, and further the height of a pretreatment part 2 for reaping grain culms is not higher than a set height, and the traveling speed of a traveling machine body is lower than a set speed, the operation is judged to be in the manual threshing operation state, and the discharged air is restricted by stopping the cooling fan 8 or reversely driving an electrically driven fan 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a combine that can be handled by hand, and more particularly, to a combine that exhausts engine cooling air generated by a cooling fan toward the threshing portion.

Generally, this type of combine consists of a pre-processing unit that cuts the stems, a threshing unit that threshs and sorts the grains from the harvested stems, a post-processing unit that post-processes the threshed waste, and a crawler type traveling unit. The engine includes an engine for supplying power to each of the above parts. The combine configured as described above is automatically performed from the cutting of the stalks to the post-treatment of the slaughter, but it is also possible to perform a hand-handing operation for threshing the hand-sheared stalks. A hand handling operation is performed by manually feeding hand-cutted stems to the start end of the threshing feed chain, standing on the front side of the section (see, for example, Patent Document 1).
JP 2005-87130 A

  However, in a general combine, an engine is arranged on one side of the threshing unit, and the engine cooling air generated by the cooling fan is exhausted to the threshing unit side via the radiator and the engine. As a result, there was a problem that the engine cooling air in hot air hit the worker who was handling the vehicle and felt hot.

The present invention has been created in order to solve these problems in view of the above circumstances, and is a combine that exhausts engine cooling air generated by a cooling fan toward the threshing portion. A handling judgment means for judging the handling operation state of the combine, and an exhausting air that regulates the exhausting of the engine cooling air toward the threshing portion when it is judged that it is in the handling operation state And a regulating means. In this way, even with a combine that exhausts the engine cooling air generated by the cooling fan toward the threshing portion, the exhaust air of the engine cooling air toward the threshing portion is not handled during the handling operation. Since it is regulated, it is possible to prevent the engine cooling air in a hot air state from hitting a worker who is handling the vehicle.
In addition, the hand-handling judgment means judges a hand-handling work state based on an operation of a hand-handling work operation switch provided in the threshing section. In this way, it is possible to easily and accurately determine the handling operation, and to reliably control the exhaust of the engine cooling air during the handling operation.
Further, the hand-handling determination means is configured such that the height of the pre-processing unit that cuts off the stems is not more than a set height when the working machine clutch is engaged so that the threshing power is turned on and off, and the traveling speed of the traveling machine body is the set speed. In the following cases, it is determined that it is in a handling operation state. In this way, even in a combine that does not include a handling operation switch, it is possible to determine the handling operation and restrict the exhaust of engine cooling air during the handling operation.
Further, the exhaust air restricting means restricts exhaust air of the engine cooling air directed toward the threshing portion side by driving the cooling fan in the reverse direction. If it does in this way, the exhaust of the engine cooling wind toward the threshing part side can be controlled with a comparatively simple configuration.
Moreover, the said threshing side exhaust wind regulation means regulates the exhaust air of the engine cooling wind toward the said threshing part side by stopping the said cooling fan. If it does in this way, the exhaust of the engine cooling wind toward the threshing part side can be controlled with a relatively simple configuration.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 to 3, reference numeral 1 denotes a combine. The combine 1 includes a pre-processing unit 2 that cuts the stems, a threshing unit 3 that threshs and sorts grains from the cut stems, and an operation on which the operator gets on. A section 4, a crawler type traveling section 5, and the like are provided, and an engine room 6 is configured below the operation section 4.

  As shown in FIG. 4, an engine room 6 includes an engine 7, a cooling fan 8 disposed on the right side of the engine 7, a radiator 9 disposed on the right side of the cooling fan 8, and the radiator. 9, an oil cooler 11 disposed on the right side of the oil cooler 11 and an electric fan 12 disposed on the right side of the oil cooler 11 are provided. The right side of the electric fan 12 serves as an air inlet 13 of the engine room 6 from which engine cooling air is introduced.

  The intake port 13 of the engine room 6 is covered with an engine cover 14. The engine cover 14 has a dust net that functions as a filter, and the engine cooling air filtered here is introduced into the engine room 6. At this time, the introduction of the engine cooling air into the engine room 6 is forcibly performed mainly according to the rotational drive of the cooling fan 8. That is, according to the rotational drive of the cooling fan 8, engine cooling air is sucked into the engine room 6 from the right side of the machine body, and the radiator 9 and the oil cooler 11 are cooled by the engine cooling air. Then, the engine cooling air in a hot air state passing through the radiator 9 and the oil cooler 11 passes through the side of the engine 7 and is exhausted to the left side of the engine room 6. The engine cooling air exhausted from the engine room 6 passes through the front side and the lower side of the threshing unit 3 and reaches the left side of the machine body due to the arrangement configuration of the combine 1.

  The electric fan 12 can also be used as a cooling fan that sucks in engine cooling air. However, in the present embodiment, the electric fan 12 is mainly used as an exhaust fan that blows air in the engine room 6 to the outside through the engine cover 14. It is driven at the timing described later. Further, as shown in FIG. 5, an alternator 16 and a water pump (not shown) are attached to the engine 7 side. The alternator 16 is driven by an alternator pulley 17, and the water pump is a water pump pulley. 18 driven. The cooling fan 8 is driven by a fan pulley 19 concentric with the water pump pulley 18.

  Next, drive configurations of the water pump, the alternator 16 and the cooling fan 8 will be described with reference to FIGS. As shown in these drawings, an output pulley 22 is attached to the output shaft 21 of the engine 7, and the first drive belt 23 is suspended from the output pulley 22, the alternator pulley 17 and the water pump pulley 18. It has been turned. The first drive belt 23 is in contact with a tension pulley 24 from the outside, and is in contact with a tension pulley 26 from the inside.

  The tension pulley 24 is supported by a swingable tension arm 27 with the output shaft 21 as a fulcrum, and the tension pulley 26 is supported by a swingable tension arm 28 with a water pump drive shaft as a fulcrum. In addition, an interlocking mechanism is provided between the tension pulleys 24 and 26 so that the tension pulleys 24 and 26 swing together. The tension pulley 24 interlocks with the swinging of the tension pulley 26. It is made to swing. This interlocking mechanism, for example, swings and drives the tension spring 29 provided between the tension arm 28 and the fixing member, the tension spring 31 provided between the tension arm 28 and the tension arm 27, and the tension arm 28. A tension arm drive mechanism 32;

  The tension arm drive mechanism 32 includes an electric motor 33 with a speed reduction mechanism, a sector gear 34 that is driven to swing by the electric motor 33, an arm 36 that is integrally attached to the sector gear 34, and the arm 36. The wire 37 is connected to the tension arm 28. The tension spring 29 urges the tension arm 28 in the direction in which the tension pulley 26 contacts the first drive belt 23, and the tension arm drive mechanism 32 urges the tension arm 28 against the urging force of the tension spring 29. It can be driven to swing.

  Since one end of the tension spring 31 is attached to the tension arm 28, the tension spring 31 is biased in a direction in which the tension pulley 24 is brought into contact with the first drive belt 23 with the tension arm 28 as a reference. In the state shown in FIG. 7, the tension of the first drive belt 23 is maintained by the contact between the tension pulleys 24 and 26, and power is transmitted from the output pulley 22 to the alternator pulley 17 and the water pump pulley 18. And the water pump is driven.

  A fan output pulley 38 that rotates integrally is connected in parallel to the tension pulley 26, and a second drive belt 39 is suspended between the fan output pulley 38 and the fan pulley 19. Accordingly, as shown in FIG. 7, when the tension pulley 26 is brought into contact with the first drive belt 23, not only the tension pulley 26 rotates but also the fan pulley via the fan output pulley 38 and the second drive belt 39. 19 rotates and the cooling fan 8 is rotationally driven.

  On the other hand, as shown in FIG. 8, when the electric motor 33 is driven and the tension pulley 26 is separated from the first drive belt 23, the rotation drive of the cooling fan 8 is stopped along with the rotation stop of the tension pulley 26. At this time, as the tension arm 28 swings, the tension arm 27 swings via the tension spring 31, and the tension pulley 24 applies tension to the first drive belt 23. Thereby, the tension of the first drive belt 23 is maintained, and the drive of the alternator 16 and the water pump is maintained.

  As shown in FIGS. 1 to 3, a threshing feed chain 40 is provided on the left side surface of the threshing unit 3 so as to face in the front-rear direction. Threshing process in the treatment room. During cutting cutting, the stems cut by the pre-processing unit 2 are automatically supplied to the starting end of the threshing feed chain 40, but the manually cut stems are supplied to the starting end of the threshing feed chain 40 manually. It is also possible to perform hand handling work. The threshing unit 3 selects the threshed grain and conveys it to the grain tank 41. A discharge auger 41a is connected to the grain tank 41 of the present embodiment, and the grain is carried out via the discharge auger 41a.

  Usually, at the time of handling operation, as shown in FIG. 3, an operator stands on the front side of the threshing section 3 and manually supplies hand-cutted stems to the start end of the threshing feed chain 40. At this time, the machine body is set to a travel stop state, and the work machine clutch for turning on and off the threshing power is set to the on state. Moreover, it is preferable that the height of the pre-processing part 2 shall be below predetermined height (cutting work height). This is because in a state where the pretreatment unit 2 is raised, the conveyance mechanism on the pretreatment unit 2 side protrudes to the start end portion of the threshing feed chain 40 and it becomes difficult to supply the stems. Therefore, the combine 1 is in a hand-operated working state when the height of the pre-processing unit 2 is equal to or lower than the set height and the traveling speed of the traveling machine body is equal to or lower than the set speed in the engaged state of the work implement clutch. Probability is high.

  The combine 1 according to the present embodiment includes a handle switch 42 on the left side surface of the threshing unit 3. The handling switch 42 is a handling operation switch for turning on and off the handling mode. In the handling mode, each part of the combine 1 is automatically adjusted to a state suitable for handling operation. . For example, when the handle switch 42 is operated while the engine is rotating and the work implement clutch and the mowing clutch are engaged, the mowing clutch is automatically disengaged and the threshing feed chain 40 is driven.

  Next, the control configuration of the combine 1 will be described with reference to FIGS. As shown in FIG. 9, the combine 1 is provided with a control unit 43 configured using a microcomputer (including a CPU, a ROM, a RAM, an I / O, and the like). On the input side of the control unit 43, the above-described hand-operated switch 42, a work machine clutch switch 44 that detects whether the work machine clutch is on / off, a lift potentiometer 45 that detects the height of the preprocessing unit 2, and the traveling speed of the machine body A mission rotation sensor 46 to be detected, a grain discharge switch 47 for discharging the grain stored in the grain tank 41, and the like are connected, and the above-described electric fan 12, electric motor 33, etc. are connected to the output side. ing. And the control part 43 performs control, such as a 1st and 2nd wind exhaustion control control (exhaust air control means), a reverse fan control, according to the control program previously written in ROM.

  As shown in FIG. 10, in the first wind exhaust restriction control, first, the operation (OFF → ON) of the handle switch 42 is determined (S101). When it is determined that the handle switch 42 has been operated, the handle mode flag is referred to (S102). When it is OFF, the handle mode flag is set ON (S103). OFF is set (S104). That is, ON / OFF of the handling mode flag is reversed every time the handling switch 42 is operated. After the reversal processing of the handling mode flag or when the handling switch 42 is not operated, it is determined whether or not the handling mode flag is ON (S105: handling judgment means). Then, it is determined whether or not the electric fan 12 is rotating in reverse (S106). If this is NO, the cooling fan 8 is stopped by driving the electric motor 33 (S107), and the electric fan 12 is driven in reverse (S108). When the handling mode flag is OFF, it is determined whether or not the electric fan 12 is rotating forward (S109). When this is NO, the cooling fan 8 is rotated by driving the electric motor 33. (S110) and the electric fan 12 is driven to rotate forward (S111).

  If it does in this way, even if it is the combine 1 which exhausts the engine cooling wind which the cooling fan 8 wakes toward the threshing part 3 side, the engine cooling wind toward the threshing part 3 side will be carried out during the handling operation. Therefore, it is possible to prevent the engine cooling air in the hot air state from hitting the worker who is handling the vehicle. Further, since the handling operation state is determined based on the operation of the handling switch 42 provided in the threshing unit 3, the handling operation is easily and accurately determined, and the threshing unit 3 in the handling operation is determined. It is possible to reliably regulate the exhaust air of the engine cooling air toward Moreover, since the electric fan 12 is driven in reverse, dust adhering to the engine cover 14 can be positively removed, and the engine cover 14 can be prevented from being clogged.

  As shown in FIG. 11, in the second wind exhaust restriction control, the work machine clutch is engaged / disengaged (S201: hand-handling judgment means), the position of the pre-processing unit 2 (S202: hand-handling judgment means), and the machine body The travel speed (S203: hand-handling determination means) is determined. Here, when the work machine clutch is engaged, the pre-processing unit 2 is in the lowered position (below the set height), and the machine body is stopped (below the set speed), it is determined that it is in a hand-held work state, It is determined whether or not the electric fan 12 is rotating in reverse (S204). If this is NO, the cooling fan 8 is stopped by driving the electric motor 33 (S205), and the electric fan 12 is driven in reverse (S206). Further, when it is determined in S201 to S203 that it is not in the handling operation state, it is determined whether or not the electric fan 12 is rotating forward (S207). If this is NO, the electric motor 33 is driven. The cooling fan 8 is rotated (S208), and the electric fan 12 is driven to rotate forward (S209). If it does in this way, the exhaust of the engine cooling wind toward the threshing part 3 can be controlled also at the time of the handling operation other than the handling mode.

  As shown in FIG. 12, in reverse fan control, first, based on the operation signal of the grain discharge switch 47, etc., it is determined whether the grain tank 41 is discharging the grain (S301). If the result is YES, a reverse timer is set (S302). After the timer is set, the remaining time of the reverse rotation timer is determined (S303). If the remaining time is other than 0, it is determined whether or not the electric fan 12 is rotating in reverse (S304). If this is NO, the cooling fan 8 is brought into a rotation stop state by driving the electric motor 33 (S305), and the electric fan 12 is driven in reverse (S306). If the remaining time of the reverse rotation timer is 0, it is determined whether or not the electric fan 12 is rotating forward (S307). If this is NO, the cooling fan 8 is rotated by driving the electric motor 33. (S308) and the electric fan 12 is driven to rotate forward (S309). If it does in this way, since electric fan 12 is reversely driven over the predetermined time after grain discharge from during grain discharge, dust adhering to engine cover 14 is removed positively, and engine cover 14 is clogged. Can be prevented.

  According to the present embodiment configured as described above, the combine 1 exhausts the engine cooling air generated by the cooling fan 8 toward the threshing portion 3, and the handling operation state of the combine 1 is changed. When it is judged that the engine cooling air is in the handling operation state, the exhaust air of the engine cooling air directed toward the threshing unit 3 side is regulated, so that the engine cooling air in the hot air state is given to the worker during the handling operation. It can prevent hitting.

  Moreover, in this embodiment, since the handling operation state is determined based on the operation of the handling switch 42 provided in the threshing unit 3, the handling operation is easily and accurately determined. The exhaust air of the engine cooling air toward the threshing unit 3 can be reliably regulated.

  Further, in the present embodiment, in the engaged state of the working machine clutch that turns on and off the threshing power, the height of the pre-processing unit 2 that cuts off the stems is not more than the set height, and the running speed of the traveling machine body is not more than the set speed. At this time, since it is determined that the state is a hand-operated work state, the exhaust of the engine cooling air toward the threshing unit 3 can be restricted even during the hand-operated work where the hand-operated switch is not operated.

  Further, in the present embodiment, when it is determined that the state is a handling operation state, not only the cooling fan 8 is stopped, but also the electric fan 12 is driven in reverse rotation, so that dust attached to the engine cover 14 is positively removed, Clogging of the engine cover 14 can be prevented.

  Needless to say, the present invention is not limited to the above embodiment. For example, in the above embodiment, the cooling fan (fan driven by engine power) is stopped and the electric fan (fan driven by motor power) is used. ), The exhaust air of the engine cooling air toward the threshing part is regulated. However, in a combine without an electric fan, the exhaust air may be regulated only by stopping or reversing the cooling fan. . Further, in a combine that does not include a cooling fan, the exhaust air restriction may be performed only by stopping or reversing the electric fan. Also, the type of fan used in the present invention is not limited to the above, and for example, a variable blade fan that switches the wind direction by changing the blade angle, or a hydraulic motor fan that is driven forward and backward by hydraulic pressure can be used.

It is a left view of a combine. It is a right view of a combine. It is a top view of a combine. It is a principal part rear view which shows the inside of an engine room. It is a principal part right view which shows the inside of an engine room. It is an expansion | deployment rear view which shows the drive structure of a water pump, an alternator, and a cooling fan. It is a right view which shows the cooling fan drive state of the said drive structure. It is a right view which shows the cooling fan stop state of the said drive structure. It is a block diagram which shows the control structure of a combine. It is a flowchart which shows 1st exhaust wind control control. It is a flowchart which shows 2nd wind regulation control. It is a flowchart which shows reverse rotation fan control.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combine 2 Pre-processing part 3 Threshing part 7 Engine 8 Cooling fan 9 Radiator 11 Oil cooler 12 Electric fan 14 Engine cover 32 Tension arm drive mechanism 40 Threshing feed chain 42 Handling switch 43 Control part 44 Work machine clutch switch 45 Lift potentiometer 46 Mission rotation sensor 47 Grain discharge switch

Claims (5)

  A combine that exhausts the engine cooling air generated by the cooling fan toward the threshing portion side, and is a handling determination unit that determines a handling operation state of the combine, and a handling operation state Combined with an exhaust air regulating means for restricting exhaust air of the engine cooling air directed toward the threshing portion when judged.   The combine according to claim 1, wherein the handling determination unit determines a handling operation state based on an operation of an operation switch for a handling operation provided in the threshing unit.   In the state where the working machine clutch for turning on and off the threshing power is in the engaged state, the hand handling determining means has a height of the pre-processing unit that cuts off the stems and the traveling speed of the traveling machine body is equal to or lower than the set speed. The combine according to claim 1, wherein the combine is determined to be in a handling operation state.   The combine exhaust air according to any one of claims 1 to 3, wherein the exhaust air restricting means restricts exhaust air of the engine cooling air directed toward the threshing portion by driving the cooling fan in the reverse direction. .   The said threshing side exhaust wind regulation means regulates the exhaust wind of the engine cooling wind toward the said threshing part side by stopping the said cooling fan, The any one of Claims 1-3 characterized by the above-mentioned. Combine.

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