JPH099760A - Dust collector in mobile farm machine - Google Patents

Abstract

PURPOSE: To improve sealing performance against the space formed between a rotary screen and a protecting cover for the periphery of the rotary screen in a dust collector for drawing the dust attached on the surface of the rotary screen into an air intake duct to remove it by air suctioning force. CONSTITUTION: A dust collector in a mobile farm machine draws the dust attached on the surface of a rotary screen 31 into an air intake duct to remove it by air suctioning force. A seal brush is planted on either the inner periphery of a protecting cover 29 covering the outer periphery of the rotary screen 31 or the outer periphery of the rotary screen to closely seal the space formed between the rotary screen 31 and the protecting cover 29 by the seal brush.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention sucks and removes dust adhering to a dust-proof rotary screen at a cooling air intake of an engine used in a mobile agricultural machine such as a combine by suction air from an intake duct to remove dust from the screen. The present invention relates to a dust remover for a mobile agricultural machine, which is capable of maintaining stable operation.

[0002]

2. Description of the Related Art A rubber lip seal is fixed to the circumferential edge of a rotary screen, and the lip portion of the seal is slidably contacted with the inner surface of a protective cover that covers the periphery of the screen, so that dust enters through the gap between the screen and the cover. There are means to prevent this.

[0003]

However, because the lip seal does not follow the protective cover well, a gap is formed and dust enters, and the sliding resistance between the cover and the seal is large, which drives the rotary screen. The load on the motor has been increased to shorten the life of the motor and increase the capacity.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention provides a dust removing apparatus for a mobile agricultural machine, wherein dust adhering to the surface of the rotary screen is sucked into an intake duct by an air suction force to be removed. A seal brush is planted on either the inner circumference of the protective cover or the outer circumference of the rotary screen, and the gap formed between the rotary screen and the protection cover is sealed with the seal brush. Compared to the conventional lip seal, the followability of the seal brush to the sliding surface of the cover is improved, and the dust entry path is complicated to effectively prevent dust from entering through the gap and to improve sliding resistance. By reducing the load on the motor that drives the rotary screen, the life of the motor can be extended and the capacity of the motor can be reduced. That.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is an explanatory view of a seal portion of a rotary screen,
FIG. 2 is an overall side view of the combine, and FIG. 3 is a plan view thereof. In the figure, (1) is a machine base equipped with a traveling crawler (2) on a track frame (3), and (4) is an axial flow type screw. A threshing unit equipped with a shape handling cylinder (5) and a swing selection unit and mounted on the machine stand (1), and (6) a grain of the threshing unit (4) taken out through the fried cylinder (7). A grain tank,
(8) is a reaper that is installed in the lower front of the threshing unit (4) so as to be able to move up and down via a hydraulic cylinder (9), and (10) includes a driver's seat (11) and a driving operation unit (12). An operating cabin disposed in front of the grain tank (6), (1
3) is an engine part provided behind the grain tank (6) and internally has an engine (14), and (15) takes out the grain in the grain tank (6) through a lower discharge auger (16). It is an auger that carries out the upper part of the grain.

The mowing section (8) includes a grain mowing header (17) for receiving the uncut grain culm, and the header (1).
7) Connect the harvested culm to the threshing section (4) by connecting it to the approximate center of the rear part.
And a reed drive type cutting blade (20) and a grain-scraping auger (21). In preparation for (17), the cut culms to be taken into the header (17) are sent to the threshing section (4) through a supply chain conveyor (22) provided in the feeder house (18) for threshing treatment. are doing.

A second reducing cylinder (23) is provided on the outer right side of the threshing unit (4) so that the second processed product is returned to the sorting unit for re-sorting.

As shown in FIGS. 4 to 9, an engine radiator (2) for cooling the combustion chamber of the engine (14).
4) and an outside air suction fan (25) for cooling the radiator
And an intercooler (26) for cooling the operation cabin (11) blown air is disposed in the radiator cooling chamber (27) above the engine section (13) to provide an engine room (28) below the engine section (13). Is configured to be isolated.

An engine cover (29) is provided on the right outside of the engine section (13) so as to be openable and closable.
A circular outside air intake (30) for taking in cooling air, which is the outside air, is provided in the cooling chamber (27) in the engine cover (29), and a dust-proof rotary screen (31) is provided in the intake (30). By disposing the screen (31)
The oil cooler (26) and the radiator (24) are cooled by the clean air after dust removal.

The screen (31) rotatably supports a central support shaft (33) on a support frame (32) which is fixed inside the engine cover (29) in the oblique diameter direction of the outside air intake (30). At the same time, as shown in FIG. 10, the outer and inner rollers (34) (3) that press-contact the bent peripheral edge portion (31a) of the screen (31) from the outer and inner circumferential sides.
5) is the same arm support shaft (3) of the support frame (32).
6) an arm for external and internal contact (3
7) The spring attachment piece (39) at the tip of the inscribed arm (38) is pivotally supported at the tip and the intermediate portion of (38),
Roller pressure contact spring (40) between the tips of the arm for external contact (37)
Screen rotation motor (41) for stretching and rotating the circumscribing roller (34) provided on the circumscribing arm (37).
Therefore, the screen (31) is configured to rotate.

Further, a cylindrical intake duct (43) facing the intake port (42) in the radial direction on the right surface of the screen (31) is fixedly supported by the engine cover (29), and the duct (43) is supported. The proximal exhaust port (44) of the intake fan (44) is connected to the fan case (46) of the intake fan (45) arranged at the left rear part of the cooling chamber (27) through the suction pipe (47) to connect the intake fan (44). The dust adhering to the surface of the screen (31) by the air suction force of 45) sucks in the intake port (42).
The air is drawn into the intake duct (43) and the engine (1
4) The dust is discharged through the dust pipe (48) under the machine base (1) on the left rear side.

In the figure, (49) and (50) are an air cleaner and a precleaner for the combustion air supplied to the engine (14), and (51) is an exhaust pipe (5) of the engine (14).
It is a muffler provided in 2).

By the way, the screen (31) is formed by bending a disc-shaped outer periphery by approximately 90 degrees to form a bent peripheral edge portion (31a), and the outer end side of the peripheral edge portion (31a) is inscribed and inscribed by a roller. (34) An elastic brush base (5) which is pressed and supported by (35) and which is provided with a synthetic resin seal brush (53).
3a) is fixed to the outer peripheral surface on the inner end side of the peripheral edge portion (31a). A cylindrical seal body (54) having an inner peripheral surface (54a) having a diameter larger than that of the outside air intake (30) around the support shaft (33) is integrally fixed to the inner surface of the engine cover (29). By installing the tip of the brush (53) in sliding contact over substantially the entire width of the inner peripheral surface (54a), a gap (55) formed between the engine cover (29) and the screen (31). Is sealed with a brush (53) to prevent dust and the like from entering through the gap (55).

A shield plate (56) having a larger shape than the intake port (42) is provided at a position facing the intake port (42) in the cooling chamber (27) through the screen (31) of the intake duct (43).
The suction force of the suction fan (25) is
2) It is configured so that it can be prevented from extending in the direction, and the suction duct (43) can be satisfactorily sucked without being affected by the suction of the suction fan (25).

Further, as shown in FIG. 11, the screen (31) is located at the intake port (42) of the intake duct (43).
The inlet gap (57) between the lower edge of the U-shaped cross-section of the intake duct (43) on the inlet side with respect to the rotation direction of the screen and the surface of the screen (31) is enlarged to a constant wide width (T), and is also on the outlet side. The exit gap (5 between the upper edge and the screen (31) surface
8) is narrowed to a constant narrow width (t) to make it easier for dust adhering to the surface of the screen (31) during rotation of the screen (31) to enter the intake duct (43) through the inlet gap (57). The dust that has entered the duct (43) is maximally prevented from exiting through the outlet gap (58), and the suction dust (43) is completely sucked and removed.

On the other hand, as shown in FIGS. 3, 4 and 12, the forward / reverse gear mechanism (5) for driving the reaper (8) in the forward / reverse direction.
9) is provided in the reaping input case (60) provided below the feeder house (18) and the rear part of the driver's seat (11), and the input shaft (61) of the input case (60) is the engine (14). From the counter shaft (62) to the pulley (63)
(64) and the belt (65) are interlockingly connected, and the output shaft (66) of the input case (60) is attached to the sprocket (6) of the cutting drive shaft (67) of the feeder house (18).
8) (69) and chain (70) are interlockingly connected. Further, two driven bevel gears (72) and (73), which are idle-supported in opposed relation to the output shaft (66), are provided to the central drive bevel gear (71) attached to the input shaft (61).
Outer gear parts (74a) (74b) of a slide gear (74) which are always meshed symmetrically with 0 degree and are slidably fitted on the output shaft (66) between the facing bevel gears (72) (73). Switching fork (75)
The output shaft (66) is configured to rotate normally and reversely by meshing with the inner gear portions (72a) (73a) of the two driven bevel gears (72) (73).

A forward / reverse switching lever (78) is provided through a lever mounting plate (77) on a cabin rear frame (76) connecting the right side surface on the front side of the threshing unit (4) and the rear portion of the operating cabin (10). The switching lever (78) is provided between the threshing unit (4) and the driving cabin (10) at a position lateral to the driver's seat (11), and the fork shaft (79) of the fork (75) is slidably operated. The switching lever (78) is interlockingly connected to the moving arm (80) via the rod (81), and the hand is put out of the window on the left side of the driving cabin (10) to operate the switching lever (78) to move the fork ( By directly transmitting the switching operation force of the operator to the cable 75) via the rod (81), it is possible to easily and surely switch between the forward and reverse directions.

This embodiment is constructed as described above, and has an engine cover (29) and a rotary screen (3).
The gap (55) formed between 1) is sealed by a brush (53) which is planted in the screen bent peripheral edge portion (31a) and brought into sliding contact with the seal inner peripheral surface (54a) on the cover (29) side. Which can prevent dust from entering the inside,
Compared to the conventional one using a rubber lip seal, the followability with respect to the cover (29) is improved to improve the sealing performance, and the sliding resistance is reduced so that the motor (41) for rotating the screen (31) is improved. The drive load is reduced to prolong the service life of the motor (41) and the capacity of the motor (41) is reduced, and further, the inner circumference surface (54a) of the seal centering on the rotation support shaft (33) of the screen (31). Brush with (53)
With the sealing of the brush (53), it is possible to achieve a highly accurate sealing by suppressing the fluctuation in this sealing portion to the maximum.
This makes it possible to complicate the dust entry path and further improve the sealing effect.

Further, as shown in FIG. 13, brushes (53) are planted on both the screen bent peripheral portion (31a) and the inner peripheral surface (54a) of the seal, and the brushes (53) are arranged so as to face each other. This makes it possible to further complicate the dust invasion path and improve the sealing effect. The effect can be further improved by providing the seal portions by the brushes (53) at two or more opposing positions.

In the above embodiment, the brush (5
Although the configuration of 3) is used for the dustproof device, it can also be used for the dust collector.

Further, FIG. 14 shows a configuration example in which the water in the engine radiator (24) is used as the heat source of the air heater (82) for heating the inside of the operation cabin (10). Oil cooler (83) for cooling the working oil of the hydraulic cylinder (9) for raising and lowering the mowing
In the structure in which the air heater (82) and the oil cooler (83) are connected, a pipe (84) is connected and a heat source of the oil cooler (83) closer to the radiator (24) is used, It is possible to shorten the route and simplify the structure.

[0022]

As is apparent from the above embodiments, the present invention is a mobile agricultural machine in which dust adhering to the surface of the rotary screen (31) is sucked into and removed from the intake duct (43) by the air suction force. In the dust removing device, the rotary screen (31) is covered with a seal brush (53) either on the inner circumference of the protective cover (29) or on the outer circumference of the rotary screen. Since the gap (55) formed between the (31) and the protective cover (29) is sealed with the seal brush (53), the seal brush against the sliding surface of the cover is compared to the conventional lip seal. The followability of (53) can be improved, and the dust entry path can be complicated to effectively prevent dust from entering through the gap (55), and the sliding resistance can be reduced. Rotary screen (31)
By reducing the load of the motor (41) for driving the motor (41), the life of the motor (41) can be extended, and the capacity of the motor (41) can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a seal portion of a rotary screen.

FIG. 2 is an overall side view of the combine.

FIG. 3 is an overall plan view of the combine.

FIG. 4 is a front explanatory view of the combine body.

FIG. 5 is a side view of the engine section.

FIG. 6 is a rear view of the engine section.

FIG. 7 is an explanatory plan view of an engine unit.

FIG. 8 is a side view of a rotary screen portion.

FIG. 9 is an explanatory plan view of a rotary screen portion.

FIG. 10 is an explanatory diagram of a rotary drive unit of a rotary screen.

FIG. 11 is a cross-sectional explanatory view of an intake duct.

FIG. 12 is a cross-sectional explanatory view of a reaping input case portion.

FIG. 13 is an explanatory diagram of a dustproof brush.

FIG. 14 is an explanatory diagram of an operating cabin portion having an air heater.

[Explanation of symbols]

 (29) Cover (31) Rotary screen (43) Intake duct (53) Brush (55) Gap

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Kawasaki 428 Enami, Okayama City Seirei Industrial Co., Ltd. In-house

Claims (1)

[Claims] 1. A dust remover for a mobile agricultural machine in which dust adhering to the surface of a rotary screen is sucked and removed by an air suction force by an air suction force, and an inner circumference of a protective cover that covers the periphery of the rotary screen. Part or the outer circumferential portion of the rotary screen, a seal brush is planted on either side, and the gap formed between the rotary screen and the protective cover is provided so as to be sealed by the seal brush. Dust removal device.