JP5846238B2 - Dust removal device for dust cover - Google Patents

Description

  The present invention relates to a dust removing device for a dustproof cover that removes dust adhering to a dustproof cover arranged outside a radiator of an engine.

  Since work vehicles such as combiners and tractors are used in an environment where dust is generated, dust tends to adhere to the dust cover provided in the area where the cooling air is sucked.If the dust cover is clogged with dust, the engine will overheat. Overheating. In order to prevent this, the suction fan that sucks the cooling air rotates forward and reverse, or the direction of the suction fan blades is reversed to generate a blowing air in the opposite direction to the suction air. Blowing off and removing dust adhered to the cover is performed.

  For example, in Japanese Patent Application Laid-Open No. 9-49429, the suction fan can be rotated forward and reverse, and when the resistance of the suction air of the dust removal cover increases, the suction fan is rotated reversely by operating a switch provided on the control panel. Yes.

  Japanese Patent Laid-Open No. 2006-112387 discloses that the dust cover is clogged by changing the blade direction of the suction fan to the blowing direction at the timing set by the control program and generating blowing air even when the fan shaft rotates in the same direction. To be removed.

JP-A-9-49429 JP 2006-112387 A

  While the blower air is blown toward the dust cover by the suction fan to remove the dust from the dust cover, the cooling air does not flow to the engine side and the engine and radiator are heated. Can not work. Further, the absence of cooling air when the engine is rotating under heavy load tends to overheat the engine.

  In the prior art, in which the former operator operates the switch and sends the blown air by reversing the rotation of the suction fan, the switch operation is troublesome and the dust removal cover is clogged. In the technology that sends the blown air by switching the suction fan blade direction to the blowing direction at the timing set in the latter control program, the engine load is large and cooling air is required, but the cooling is switched to the blowing air at the control timing. There is a risk of overheating due to the loss of wind.

  The present invention provides a dustproof cover dust removal device for an engine which automatically rotates in a timely manner in a dustproof cover dust removal device for an engine in which a suction fan that sucks cooling air through the dust removal cover to the engine side is reversely rotated and blown air is sent to the dust removal cover. It is an object of the present invention to remove dust from the dust removal cover by generating blowing air.

  The problems of the present invention are solved by the following technical means.

According to the first aspect of the present invention, there is provided a first fan for sucking engine cooling air from the outside to the inside of the dust cover (3) provided outside the engine (1). 6), the second place the fan (5) for blowing air from the inside to the outside of the dust cover (3), provided the first fan (6) and the second fan (5) on the same axis, the The blades of the first fan (6) and the second fan (5) are twisted in opposite directions, and the first fan (6) and the second fan (5) are driven by the driving force of the engine (1). The dust removing device for the dustproof cover is configured to be selectively driven in the same rotation direction .

According to a second aspect of the invention, the first and second fan fan (6) (5), provided on the fan shaft driven by the engine (1) (4), with the first fan (6) first A shift clutch (15) is provided between the two fans (5), and the fan shaft (5) is connected to one of the first fan (6) and the second fan (5) via the shift clutch (15). The dust removing device for a dustproof cover according to claim 1, wherein the device is configured to transmit the rotation of 4).

According to a third aspect of the present invention, the first fan (6) and the second fan (5) are slidably supported by a fan shaft ( 4 ) driven by the engine (1), and the first fan (6) and the second fan (5) are slidably supported by the slide . The dust removing device for a dustproof cover according to claim 1, wherein any one of the first fan (6) and the second fan (5) is connected to the fan shaft ( 4 ) and rotates.

According to a fourth aspect of the present invention, there is provided the dustproof cover according to the first, second or third aspect, wherein the second fan (5) is disposed between the engine (1) and the first fan (6) . A dust removing device is used.

According to the first to fourth aspects of the present invention, it is possible to remove the dust from the dust cover (3) to improve the flow of the cooling air and prevent the engine (1) from being overheated.

It is a side sectional view showing a first embodiment of a fan Rotation mechanism. It is a side sectional view showing a first embodiment of a fan Rotation mechanism. It is a side sectional view showing a first embodiment of a fan Rotation mechanism. It is a control block diagram of a shift motor.

Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings.
Fan Rotation mechanism C of the first embodiment shown in FIG. 1, the fan shaft 4 and the drive output shaft 12 engine 1 is provided on the opposite side through the shift bracket 7a, the 7b, axial tip of the fan shaft 4 The support bracket 9 is supported by a bearing 9b.

Shift bracket 7a open to the left and right, across the 7b forward fan body (first fan) 6 opposite wind fan body (second fan) 5 shift bracket 7a, 7b of the slide bearing 7ab, and fitted to 7bb Yes.

The forward fan body 6 is fixed a suction wings 6y causing suction air toward the engine 1 by the rotation of the fan shaft 4, air balloon toward the outside from the engine 1 side in the rotation of the fan shaft 4 in the reverse wind fan body 5 The discharge wing 5y is fixed. Further, the axial bore of the forward fan body 6 to form a forward spline portion 6s for mating with previous spline portion 4b of the fan shaft 4, the shaft hole of the opposite wind fan body 5 yuan spline fan shaft 4 forming a reverse air spline section 5s for parts 4a and the fitting.

Then, the shift bracket 7a by a spring 11 provided between the engine 1 and the shift bracket 7a, 7b, 7b are resiliently to the distal side of the fan shaft 4, in this state, the spline portion 6s forward rotation of the forward rotation fan body 6 There was without rotating the reverse wind fan body 5 rotates forward fan body 6 fitted to the previous spline portion 4b of the fan shaft 4, causing suction air.

Further, the wire 10 is connected to the distal end side shift bracket 7b, the wire 10 is pulled against the spring 11, the forward spline portion 6s of the forward fan body 6 from the previous spline portion 4b of the fan shaft 4 off, reverse wind spline portion 5s of reverse air fan body 5 is fitted to the original spline portion 4a of the fan shaft 4, causing the balloon wind around the reverse wind fan body 5 not from turning forward rotation fan body 6. A shift motor 13 is connected to the wire 10, and the wire 10 is pulled by a command signal from a microcomputer or the like.

Outside the above fan Rotation mechanism C, and the radiator 2 to cool the cooling water of the engine 1 is provided, which covers further outwardly dust cover 3.
Fan Rotation mechanism C of the second embodiment shown in FIG. 2, substantially the same configuration as in the first embodiment, the difference, the outer shift bracket 7b, the helical shaft 14 of the shift motor 13 instead of the wire 10 The shift brackets 7a and 7b are slid by the fan shaft 4 by the rotation to generate suction air or blowing air.

Fan Rotation mechanism C of the third embodiment shown in FIG. 3, and rotatably supported by the bearing 16b, 17b of the fan bracket 16, 17 release the opposite air fan body 5 and the forward fan body 6, both fan bracket A shift clutch 15 is slidably mounted on the spline portion 4 s of the fan shaft 4 between 16 and 17. Forming a forward clutch pawls 15k2 which meshes with the clutch pawls 6k of the reverse air clutch pawls 15k1 meshes with the clutch pawls 5k reverse air fan body 5 at both ends of the shift clutch 15 and the forward fan body 6.

Then, the shift motor 13 to cause a wind balloon by rotating the reverse wind fan body 5 body when shifting the shift clutch 15 in the reverse wind fan body 5 side shifter 18 to move in, shifting the shift clutch 15 in the forward fan body 6 side Then, the six normal fan bodies rotate to generate suction air.

FIG. 4 shows a control block diagram of the shift motor 13.
The auger turning sensor 21 that detects the turning of the grain discharge auger detects turning, the transport sensor 22 detects the drive stop of the transport chain of the reaping device, or the reverse sensor 26 is turned on by moving the shift lever backward. When the travel turning sensor 27 is turned on with the turning lever at the maximum turning position, the cutting lift sensor 29 is turned on by raising the harvesting device, or the grain discharge sensor 30 of the grain discharge auger is turned on. and the input signal to the control unit 20, drives the reverse air fan body 5 and the driving signal is output to the shift motor 13 causes the balloon style.

  Since a part of the combine function is not driven when the auger turning sensor 21 transport sensor 22, the reverse sensor 26, the traveling turning sensor 27, the cutting lift sensor 29, or the grain discharge sensor 30 outputs a detection signal, these sensors reduce the load. Detection means A.

Further, the water temperature sensor 24 detects an abnormal rise in the water temperature of the radiator 2, the engine oil temperature sensor 25 detects an abnormally high temperature, or the rotation sensor 28 of the engine 1 detects a rotation speed lower than the work rotation speed during work. be or to input signal to the control unit 20, drives the reverse air fan body 5 and the driving signal is output to the shift motor 13 causes the balloon style.

1 engine 3 Dust cover 4 fan shaft 5 opposite wind fan body (second fan)
6 Forward fan body ( first fan)
15 Shift clutch

Claims (4)

A first fan (6) for sucking air for cooling the engine from the outside to the inside of the dust cover (3) provided on the outside of the engine (1), and the dust cover ( a second fan for blowing air from the inside of 3) to the outside (5) is arranged, the first fan (6) and the second fan (5) provided coaxially, a first fan (6) first The twisting directions of the blades of the two fans (5) are set to be opposite to each other, and the first fan (6) and the second fan (5) are alternatively set in the same rotational direction by the driving force of the engine (1). A dust removing device for a dustproof cover that is configured to be driven by Said first and second fan fan (6) (5), provided on the fan shaft driven by the engine (1) (4), between said first fan (6) and the second fan (5) A configuration in which a shift clutch (15) is provided and the rotation of the fan shaft (4) is transmitted to one of the first fan (6) and the second fan (5) via the shift clutch (15). The dust removing device for a dustproof cover according to claim 1. Said first and second fan fan (6) (5), the engine (1) slidably journalled in the fan shaft (4) driven by said by the slide the first fan (6) and the second The dust removing device for a dustproof cover according to claim 1, wherein any one of the fans ( 5 ) is connected to the fan shaft ( 4 ) to rotate. The dust removing device for a dustproof cover according to claim 1, 2 or 3, wherein the second fan (5) is disposed between the engine (1) and the first fan (6) .

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