JP3711618B2 - Engine cooling air system for farm vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine cooling air device for agricultural vehicles, and belongs to the technical field of an engine having an electric shutter for opening and closing a ventilation path for cooling a radiator.
[0002]
[Background Art and Problems to be Solved by the Invention]
Conventionally, in a water-cooled engine mounted on a farm vehicle such as a combine, when the cooling air of the radiator is sucked from the outside air by the radiator fan, the engine is prevented in order to prevent contamination by dust or dust generated during the work. An air intake cover using a dustproof net is installed at the entrance of the engine room that houses the engine and radiator, etc., but the dustproof net of this air intake cover becomes clogged due to the adhesion of contaminants over time. The cooling air is obstructed and the cooling capacity of the radiator is lowered, and the engine may overheat. For this reason, an electric fan provided between the intake cover and the radiator changes the ventilation path of the cooling air from the open state to the closed state, for example, an electric fan located near the inside of the intake cover and normally blowing air to the radiator side Is reversely blown to the intake cover side to clean and remove foreign substances adhering to the dust-proof net surface of the intake cover.
[0003]
However, when the main switch is turned off at the end of the work, the electric shutter is often stopped in an open state for cooling the engine at the time of the work. When left unattended until the start of work, there is a risk that the engine and its related devices may malfunction due to dust, wind, and other harmful substances entering from outside the machine such as the air intake cover.
[0004]
Therefore, the present invention closes the electric shutter in conjunction with the main switch being turned off.
[0005]
[Means for Solving the Problems]
The present invention relates to an agricultural work vehicle provided with an electric shutter 3 between an intake cover 1 and a radiator 2 that opens and closes between the intake cover 1 and a radiator 2 and a main switch 5 for turning on and off an electric circuit of the engine 4. It is set as the structure of the engine cooling wind apparatus which provides the delay circuit 6 which closes this electric shutter 3 by progress of fixed time by turning off.
[0006]
[Operation and effect of the invention]
With the above-described configuration, the engine room body is located between the radiator 2 and the engine 4 and stores the cooling air of the radiator 2 by the radiator fan driven by the engine 4 and stores the engine 4, the radiator 2, the electric shutter 3, and the like. The intake cover 1 provided in the side opening sucks in air, but the intake air is shut off while the electric shutter 3 is temporarily closed, and at the time of the interruption, for example, it is located outside the electric shutter 3 and is always connected to the radiator fan. In the case where the electric fan that blows air to the radiator 2 side is blown back toward the air intake cover 1 side to clean the dustproof net, the main switch 5 is turned off when the work is completed. When this occurs, the electric circuit is operated by operating the delay circuit 6 for several seconds in conjunction with the main switch 5 being turned off. Even when the Potter 3 is stopped in an open state, shifts it in the closed state.
[0007]
As described above, when the operation is completed, the delay circuit 6 is operated by turning off the main switch 5, and when the electric shutter 3 is in the open state, it can be shifted to the closed state. For example, no matter where the combine is left for a long period of time until the start of the operation, for example, the closed electric shutter 3 blocks off harmful substances such as dust, wind, and the like that enter from the outside of the machine, such as the intake cover 1. 4 and related equipment can be prevented from malfunctioning.
[0008]
【Example】
Below, an example of this invention is explained based on a drawing about a combine which performs grain harvesting work.
A traveling device 9 having a pair of left and right crawlers 8 traveling on the soil surface is disposed on the lower side of the combine chassis 7, and the threshing of the cereal grains that are sandwiched and fed between the feed chains 10 on the chassis 7 is threshed. The threshing device 12 having the grain tank 11 for temporarily storing the grain selected and recovered by the threshing and the grain discharge cylinder 11a is placed, and the threshing waste is processed at the rear end of the threshing device 12. The cutter device 17 is attached.
[0009]
On the front side of the threshing device 12, a weed body 13 for weeding napped cereals from its front end position, a cereal culling raising part 14 for causing the weed cereal culms, and a mowing for reaping the induced cereals A chassis 7 for raising and lowering a reaping device 16 having a blade portion 15 and a culm transporting unit that transports the harvested culm backward and delivers it to the feed chain 10 so as to be rotatable up and down with respect to the soil surface. An operating device 18 for controlling the operation of the combine and an operating seat 19 for performing this operation are provided on one side of the mowing device 16, and the engine 4 is provided below the operating seat 19. The engine room 20 is arranged, and the vehicle body 21 is constituted by these devices 9, 12, 16, 18, 20 and the like.
[0010]
As shown in FIG. 6, when the cooling air of the radiator 2 is sucked from the outside air over the entire surface of the side opening A of the vehicle body 21 outside the engine room 20, contamination such as dust and dust generated during work is mixed. The air intake cover 1 for preventing the opening is mounted so as to be opened and closed by the hinge 1a.
As shown in FIGS. 1, 4, and 5, in the engine room 20, the engine 4 is fixed on the chassis 7 via a vibration isolator 23, and a pulley 25 is connected to the crankshaft 24 of the engine 4. The radiator 2 that cools the radiator 2 is fixed via the belt 26 and the radiator 2 that circulates cooling water of the engine 4 adjacent to the outside of the radiator fan 27 to cool the radiator 2. A fan guide 28 that is fixed above and surrounds the outer periphery of the radiator fan 27 from the radiator 2 side is provided.
[0011]
Adjacent to the outside of the radiator 2, an electric shutter 3 capable of opening or closing the intake air ventilation path B of the radiator fan 27 is disposed. The electric shutter 3 has a substantially equal lateral width over the entire lateral width of the engine room 20, and a fixed shutter plate 29 in which the upper and lower sides are each fixed to the outer surface of the radiator 2 with a small gap, and the fixed shutter A sliding shutter plate 30 is provided on the outer side of the plate 29 so as to be slidable in the vertical direction. The sliding shutter plate 30 slides and guides the sliding shutter plate 30 on both sides of the fixed shutter plate 29. 31 are arranged and configured. An oil cooler 22 that cools hydraulic oil is fixed on the chassis 7 outside the electric shutter 3.
[0012]
A shutter motor 34 that slides the sliding shutter plate 30 up and down is attached to the outer surface of an L-shaped motor support plate 33 fixed to the end of the top plate 32 of the engine room 20. The pinion gear 35 is pivotally supported, and a gear fulcrum portion 36a of a belt-like shutter drive plate 36 having a fan-shaped rack gear meshing with the pinion gear 35 is rotatably supported. A long groove 36b is provided in the extended portion, and a shutter drive pin 37 that is fixedly projected outward from the upper end portion of the sliding shutter plate 30 is fitted into and engaged with the long groove 36b.
[0013]
The fixed shutter plate 29 and the sliding shutter plate 30 open the air passage B when the sliding shutter plate 30 is slid upward to the upper end position, and the air passage B when the sliding shutter plate 30 is slid down to the lower end position. A plurality of windows 29a of the fixed shutter plate 29 and a window 30a of the sliding shutter plate 30 which are combined to be closed are provided at a plurality of locations, an upper limit switch 38a for detecting the upper limit position of the sliding shutter plate 30, and a lower limit position. A lower limit switch 38b to be detected is attached to each side wall of the engine room 20, and a switch detection plate 39 for operating both limit switches 38a and 38b is fixed to an appropriate position on the sliding shutter plate 30.
[0014]
The air intake cover 1 is formed in a box shape, and the box-shaped outer surface portion 1b and the inner surface portion 1c are used for dust prevention by a hollow iron plate or the like for preventing contamination such as dust and dust when the radiator fan 27 is sucked. Each of the nets 40 is formed, and in order to remove foreign matter adhering to the dust-proof net 40 on the outer surface portion 1b during intake, the electric fan 41 that reversely blows air from the inside to the outside of the dust-proof net 40 is fixed to the shaft. The fan motor 42 is fixed to an appropriate position inside the dustproof net 40 of the outer surface portion 1b by a motor support frame 43 having an open periphery.
[0015]
Provided on one side of the operating device 18 is a sub-transmission lever 44 for switching the sub-shift of the traveling mission case between work travel and high-speed travel, and the sub-shift switch that is turned on when the lever 44 is switched to the work travel side. The main switch 5 for turning on and off the electric circuit of the engine 4 is arranged in the vicinity of the auxiliary transmission lever 44 while being arranged to be engaged at an appropriate position.
[0016]
Provided is a controller 46 with a built-in delay circuit 6 (which can be connected externally) that operates the automatic shutter 3 to a closed position when the main switch 5 is turned OFF, while performing calculation control of each automatic circuit with the CPU as a main component, As shown in FIG. 3, the main switch 5, the sub shift switch 45, the upper limit switch 38a, the lower limit switch 38b, etc. are connected to the input side of the controller 46, and the electric shutter 3 is connected to the output side thereof. A shutter motor 34 for raising and lowering the sliding shutter plate 30 and a fan motor 42 for driving the electric fan 41 are connected to each other.
[0017]
The electric shutter 3 is alternately controlled to be opened and closed by the controller 46 at regular intervals. First, when the electric shutter 3 is closed, the shutter motor 34 is driven to move the rack gear from the pinion gear 35 of the motor 34. In conjunction with this, the shutter drive plate 36 is rotated about the gear fulcrum 36a, and the sliding shutter plate 30 is lowered by the shutter drive pin 37 engaged with the long groove 36b by this rotation. When the lower limit switch 38b is detected ON due to the lowering of the sliding shutter plate 30, the shutter motor 34 is stopped and the ventilation path B is closed by the non-communication of the windows 29a and 30a of the electric shutter 3. By closing the electric shutter 3, for example, the fan motor 42 is driven for 20 seconds to blow the electric fan 41 toward the outside in the direction opposite to the intake direction of the radiator fan 27.
[0018]
Next, when the electric shutter 3 is opened, the shutter motor 34 is driven by stopping the fan motor 42 to raise the sliding shutter plate 30. When the upper limit switch 38a detects ON, the shutter motor 34 is driven. The air passage B is opened by the communication between the windows 29a and 30a of the electric shutter 3. By opening the electric shutter 3, the rotation direction of the fan motor 42 is switched and driven for 30 seconds, and the electric fan 41 is blown in the same direction as the intake direction of the radiator fan 27.
[0019]
In this way, by causing the electric fan 41 to reversely blow when the intake air is closed due to the non-communication of the electric shutter 3, the foreign matter adhering to the dustproof net 40 of the intake cover 1 can be easily removed. Overheating due to poor cooling of the engine 4 can be prevented. The time interval for switching the blowing direction of the electric fan 41 can be selected and adjusted.
[0020]
When the main switch 5 is turned off at the end of such work, as shown in the flowchart and time chart of FIG. 2, the fan motor 42 is stopped and the delay circuit 6 built in the controller 46 is operated for 4 seconds. During this time, when the lower limit switch 38b is not detected OFF, the shutter motor 34 is driven for 2 seconds, and the sliding shutter plate 30 of the electric shutter 3 is moved until the lower limit switch 38b is detected ON. The shutter motor 34 is stopped by lowering the detection of the lower limit switch 38b, and the window 30a of the sliding shutter plate 30 and the window 29a of the fixed shutter plate 29 are not in communication and the electric shutter 3 has its ventilation path. B is closed. (The operating time of the delay circuit 6 and the shutter motor 34 is not limited to this embodiment, and may be set freely.)
Thus, with the completion of work, when the main switch 5 is turned off, the delay circuit 6 operates, and when the electric shutter 3 is in the open state, it can be shifted to the closed state. Wherever the combine is left for a long time until the start of the next operation, the closed electric shutter 3 blocks harmful substances such as dust, wind and the like that enter from outside the machine, such as the intake cover 1, and the engine 4 and It is possible to prevent functional failures of related equipment and the like.
[0021]
Further, when the sub-shift of the traveling transmission case is switched to the work travel side by operating the sub-shift lever 44, the shutter motor 34 is driven at regular intervals by turning on the sub-shift switch 45, and the electric shutter 3 is driven. , The air passage B is closed and the intake air is shut off, and the electric fan 41 is reversely blown by driving the fan motor 42 to remove impurities adhering to the dust-proof net 40 of the intake cover 1. However, when the sub-shift is switched from the work travel side to the high-speed travel side, the sub-transmission switch 45 is turned off to stop the removal of impurities.
[0022]
In this way, the main switch 5 can be operated by removing the foreign matter adhering to the dust-proof net 40 of the intake cover 1 only when the sub-shift of the traveling mission case is switched to the work traveling side. If the sub-shift is not switched to the work travel side even if is turned on, the electric shutter 3 and the electric fan 41 will not be operated, and therefore, when the engine 4 is inspected, etc. Risk can be prevented.
[0023]
Moreover, as shown in FIG. 7, in the threshing apparatus 12 in which the feed chain 10 for sandwiching and transferring the culm is disposed on the front side of the handling chamber 48 in which the handling cylinder 47 for threshing the cereal is disposed, A waste chain 49 that conveys the threshed waste discharged from the outlet side to the rear cutter device 17, and a stock source side chain 49 a and a tip side chain 49 b above the second spiral 50 that transfers the second thing The air compressor 51 is installed at an appropriate position on the machine frame on the opposite side of the feed chain 10 of the handling chamber 48 from the compressor 51 via the switching valve 52 and piping. The compressed air is jetted downward from the nozzles 53 disposed at eight locations a, b, c, and d at positions near the stock-side chain 49a and the tip-side chain 49b.
[0024]
In the middle of transporting the threshed waste discharged from the handling chamber 48 to the cutter knotter device 17 by the discharge chain 49, the compressed air from the air compressor 51 is switched by the switching valve 52, and a, b, c, d By sequentially changing the injection position from each of the nozzles 53 and injecting it into the waste passing through the lower side, the grain taken out as a small grain during the waste is dropped to the second spiral 50 below. Since it can collect | recover, the grain loss mixed in waste and discharged | emitted outside the machine can be prevented as much as possible, and the work precision can be improved.
[Brief description of the drawings]
FIG. 1 is a front view showing a cross-sectional view of an engine room and its arrangement.
FIG. 2 is a flowchart showing a procedure for closing an electric shutter and a time chart showing the closing timing.
FIG. 3 is a block diagram showing a control circuit of a controller.
FIG. 4 is a front view showing a detailed structure related to an electric shutter.
FIG. 5 is a perspective view showing a part of a detailed structure related to an electric shutter.
FIG. 6 is a side view showing the entire combine.
FIG. 7 is a plan sectional view showing a part of the threshing apparatus.
[Explanation of symbols]
1. 1. Intake cover 2. Radiator Electric shutter Engine 5. Main switch 6. Delay circuit

Claims (1)

In an agricultural vehicle provided with an electric shutter 3 between the intake cover 1 and the radiator 2 that opens and closes between them and a main switch 5 for turning on and off the electric circuit of the engine 4, the main switch 5 is turned off. An engine cooling wind device provided with a delay circuit 6 that closes the electric shutter 3 after a certain period of time.

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