JPS6034748Y2 - Dust control device for engine cooling ventilation ducts of agricultural machinery - Google Patents

Description

[Detailed description of the invention] The present invention relates to a dust prevention device for an engine cooling air passage provided in a cover that covers an engine mounted on an agricultural machine such as a humbine. The dust-proof net is rotatable so that dust such as straw collected on its surface can be automatically removed, and safety is not compromised by rotating the dust-proof net. I tried to avoid it.

Next, a description will be given of an embodiment in which one example of the present invention is applied to a combine harvester. In the figure, reference numeral 1 indicates a machine body in which a pair of left and right running rollers 2, 2 are pivotally connected at the rear to a track frame 3. 1 is configured such that the front part thereof is moved up and down by a hydraulic cylinder 4 installed between the body 1 and the track frame 3 at a position in front of the pivot pin,
A threshing device 5 is provided on the upper surface of the machine body 1, and a reaping pretreatment device 9 consisting of a reaping device 6, a culm lifting device 7, and a culm conveying device 8 is provided at the front.

The threshing device 5 is located at the rear left side of the machine body 1, and a foot chain 11 is installed along the upper surface of the machine frame 10.
An engine 12 is provided at the rear of the interior, and a dustproof device 14 is provided on a side plate 13 of an engine cover that covers the engine 12. One end of a door plate 15 is attached to a part of the side plate 13 with a hinge 16 so that it can be opened outward. At the same time, the other end of the door plate 15 is removably engaged with an appropriate part of the side plate 13 by means of bolts 17, etc., and the substantially central part of the door plate 15 is shaped into a cylindrical shape 18 inward of the cover. The interior of the cylindrical portion 18 is recessed to form an air path for introducing outside air, and a duct 19 is provided within the engine cover between the cylindrical portion 18 for forming the air path and the radiator portion of the engine 12. will be established.

In this case, the outer end 19' of the duct 19 is connected to the cylindrical part 1
8, protrude by an appropriate length h) and securely connect.

Inside the opening of the duct 19 to the cylindrical portion 18, a flavor plate 20 made of sheet metal with an appropriate width is installed in the vertical direction, while inside the opening of the duct 19 to the outside air, a ring-shaped support frame 22 is installed. The support frame 22 is disposed at a position appropriately inward from the surface of the door body 15, and the support frame 22 is rotatably supported on the flavor plate 20 via a shaft 24 provided at the center of the opening. A dustproof net 21 is stretched over the frame 22, and the cross section of the sheet metal flavor plate 20 is formed into a U-shape toward the dustproof net 21.

At this time, the cylindrical outer peripheral wall 22' of the support frame 22 is fitted onto the outer end 19' of the duct 19 with an appropriate gap provided.

Further, a friction wheel 27 is rotatably provided on the inner surface of the door plate 15 via a bracket 25, and a part of the friction wheel 27 protrudes from an opening groove 26 bored in the cylindrical portion 18. The friction wheel 27 is pressed against the outer peripheral surface of the cylindrical outer peripheral wall 22' of the support frame 22, and the output shaft of a motor 28 attached to the bracket 25 is pressed against the friction wheel 27. 22 is configured to rotate.

A dust removal rod 29 extending toward the center of the support frame 22 is fixed to the front side of the door body 18 at a position opposite to the flavor plate 20 with the dustproof net 21 interposed therebetween. The rod 29 is provided with a brush 30 that comes into contact with the surface of the dustproof net 21, or a scraper made of rubber or the like is provided to cut it.

In this configuration, when the engine 12 is started and the machine moves forward, and the power transmission clutch to the reaping pretreatment device 9 and threshing device 5 is turned on, the culm in the field is raised by the culm lifting device 7 and harvested. The husk is harvested by the device 6 and then transferred to the foot chain 1 of the threshing device 5 via the culm conveying device 8.
1 and is threshed by a threshing device,
The engine 12 is cooled by outside air introduced from an air passage in the cover.

During this reaping and threshing work, a large amount of garbage such as straw is generated from the dust outlet at the rear of the threshing device 5, and some of this garbage flows into the cover together with the cooling air for the engine 12. The dust accompanying this cooling air is collected on the surface of the dustproof net 21 stretched over the support frame 22, thereby preventing the dust from entering into the cover.

The dust thus collected on the surface of the dust-proof net 21 is pressed against the surface of the dust-proof net 21 by the wind pressure passing through the dust-proof net 21 at locations other than the flavor plate 20. At the location of the flavor plate 20, the presence of the flavor plate 20 weakens the wind pressure passing through the net body 21, and
Since the brush 30 or the scraper is in contact with the surface of the net 21, the dust collected on the surface of the dust-proof net 21 comes to the flavor plate 20 as the dust-proof net 21 rotates. At this point, the brush 30 or scraper automatically scrapes off the surface of the net 21 one after another.

In this case, if the surface of the flavor plate 20 on the side of the dustproof net 21 is flat, there is no space on the back side of the dustproof net 21 corresponding to the flavor plate 20, so the dustproof The dust caught on the net 21 is only pressed against the net 21 by a brush or scraper, and the dust scraping effect is insufficient. However, the flavor plate 20 of the present invention is made of sheet metal. , the cross section of the dustproof net 2
1, and a space is formed on the back side of the dustproof net 21 corresponding to the flavor plate 20, so that it can be pressed against the net 21 with a brush or scraper. Since the dirt passes through the net 21 and escapes into the space, the dirt can be scraped off and removed reliably.

As described above, the present invention has a cylindrical air passage that introduces cooling air to the engine on the side plate of the cover that covers the engine mounted on the agricultural machine, and inside the cylindrical air passage, the side plate A ring-shaped support frame is rotatably arranged around the axis of the cylindrical air passage at a position inward from the surface of the side plate, and a dustproof net is stretched over the ring-shaped support frame. A driving means for rotating the ring-shaped support frame is provided inside, and a dirt removal rod extending along the surface of the dust-proof net body to the center thereof is fixed to the surface of the side plate to remove the dirt. The removal rod is provided with a brush or scraper corresponding to the surface of the dustproof net in the ring-shaped support frame, while the back side of the dustproof net is opposed to the dust removal rod with the dustproof net interposed therebetween. A plate made of sheet metal is fixed to the side plate, and the ring-shaped support frame is pivotally supported on the plate, and the cross section of the plate made of sheet metal is formed in a U-shape toward the dustproof net. The straw and other debris collected on the dust-proof screen against the engine cooling air can be automatically removed in sequence by the rotation of the dust-proof screen, the U-shaped cross-section wind baffle plate, and a brush or scraper. This prevents deterioration of engine cooling performance due to clogging of the dustproof net, while the dust removal rod on the surface of the engine cover does not rotate and the dustproof net
Since it only rotates at a position recessed from the surface of the engine cover, there is no chance of the worker being injured by touching the rotating dust removal rod, unlike when rotating the dust removal rod like a brush. , extremely safe, and
Since the wind baffle plate is used as the pivot of the ring-shaped support frame on which the dustproof net is stretched, the structure is simple and the weight can be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of the combine, FIG. 2 is a plan view thereof, and FIG. 3 is a front view of the ventilation section.
4 is an enlarged cross-sectional view taken along the line IV--IV in FIG. 3, and FIG. 5 is an enlarged cross-sectional view taken along the line V-v in FIG. 3. 1... combine harvester body, 5... threshing device, -12... engine, 13... side plate, 15... door plate, 18...Cylindrical part, 19...Duct, 22...Ring-shaped support frame, 21...Dustproof net, 27...
・Friction wheel, 28...Motor, 29...
Dust removal rod, 30... Brush, 20...
・Wind blocking board.

Claims (1)

[Scope of utility model registration request] On the side plate of the cover that covers the engine mounted on the agricultural machine,
A cylindrical air passage is formed to introduce cooling air to the engine, and a ring-shaped support frame is installed in the cylindrical air passage at a position inward from the surface of the side plate. The ring-shaped support frame is arranged to be rotatable around an axis, a dustproof net is stretched over the ring-shaped support frame, and a drive means for rotating the ring-shaped support frame is provided inside the side plate, and the side plate is provided with a drive means for rotating the ring-shaped support frame. A dust removal rod extending along the surface of the dustproof net and the center thereof is fixed to the surface of the face plate, and the dust removal rod has a brush or a brush that comes into contact with the surface of the dustproof net in the ring-shaped support frame. While a scraper is provided, on the back side of the dustproof net, a sheet metal windbreak plate is fixed to the side plate and faces the dust removal rod with the dustproof net in between, and this windbreak A dust prevention device for an engine cooling ventilation passage of an agricultural working machine, characterized in that the ring-shaped support frame is pivotally supported on a plate, and the cross section of the sheet metal wind blocking plate is formed in a U-shape toward the dust prevention net. .