JPH079863A - Engine cooling device for combined harvester and thresher - Google Patents

Abstract

PURPOSE:To provide an engine cooling device having a mechanism capable of easily removing dust passing through a dust protection net and adhering to the cooling fin of a radiator without any need of a troublesome cleaning work. CONSTITUTION:A dust protection net 14 is fitted to an intake duct 11 for drawing the fresh air on the operation of a cooling fan 10 for a radiator 9, thereby constituting a fresh air intake section 13. A perforated plate 15 having a plurality of draft holes for evenly supplying the air drawn via the section 13 to the radiator 9 is laid at the immediate front thereof. In addition, a shutter plate 16 freely selectable between ventilation mode for allowing the suction of the fresh air through the holes of the plate 15 and screening mode for prohibiting such air suction is provided in such state as nearly superposed on the plate 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention constitutes an outside air suction portion by providing a dust-proof net in an intake duct for sucking outside air by a fan for cooling a radiator, and sucking wind from the outside air suction portion to the radiator evenly. The present invention relates to a combine engine cooling device in which a perforated plate having a plurality of ventilation holes is provided immediately in front of the radiator.

[0002]

2. Description of the Related Art In an engine cooling device having the above-mentioned structure, a perforated plate having a plurality of ventilation holes is provided immediately in front of the radiator to impart an appropriate flow resistance to the intake air,
The suction air from the outside air suction portion is evenly ventilated through the radiator, so that dust is prevented from intensively adhering to a specific portion of the dust-proof net provided in the intake duct.

[0003]

However, according to the above-mentioned conventional structure, minute dust that cannot be removed by the dust-proof net adheres to the cooling fins of the radiator during the harvesting work, causing clogging, which results in a cooling effect. There is a risk that the engine may overheat and the engine may overheat, especially under working conditions where a lot of dust is generated, it is necessary to open the engine bonnet during the harvesting work and perform radiator cleaning work frequently.
The cleaning work may reduce the efficiency of the whole harvesting work. The present invention has been made by paying attention to such an actual situation, and provided with a mechanism capable of easily removing the dust passing through the dustproof net and adhering to the cooling fins of the radiator without performing a troublesome cleaning operation. An object is to provide an engine cooling device.

[0004]

To achieve this object, a characteristic constitution of the first invention is a ventilation state in which outside air is allowed to be sucked from a ventilation hole of a perforated plate, and a ventilation state from the ventilation hole of the perforated plate. A shutter plate that can be switched to a shielded state that blocks the suction of outside air is freely placed in close proximity to the porous plate in a superposed state.

Further, the second aspect of the invention is characterized in that in the first aspect of the invention, the operation mechanism of the transmission clutch for the unloader for discharging the grains in the grain tank and the shutter plate are interlocked with each other. A mechanism is provided so that the shutter plate is switched to the ventilation state when the clutch is operated to the clutch disengaged state, and the shutter plate is switched to the closed state when the clutch is operated to the clutch engaged state.

[0006]

According to the characteristic construction of the first aspect of the invention, when the radiator is cooled during engine operation, the shutter plate is set to the ventilated state, which is the same as the state where no shutter plate exists. Appropriate flow resistance is imparted to the suction air of the nearby outside air suction portion, and the outside air is sucked substantially uniformly from all outside air suction portions. And
When the position of the shutter plate is changed to the closed state, the suction of the outside air from the intake duct is blocked, and the urging force of the outside air suction air acting on the dust around the radiator fin to adhere to the cooling fins of the radiator is weakened. The dust is removed by the eddy current generated by the turbulence of the wind between the radiator and the radiator.

According to the characteristic configuration of the second invention, the operation of switching the shutter plate to the ventilation state or the shielding state is
By interlocking with the operation of the transmission clutch for the unloader that discharges the grains in the grain tank, the transmission clutch for the unloader is in the disengaged state, that is, when the engine is used as in normal harvesting and traveling on the road. When the load is large, the shutter plate is automatically ventilated so that the radiator is sufficiently cooled by the outside air.
Further, in a state in which the transmission clutch for the unloader is engaged and operated, that is, in a working state in which the machine body is stopped and grain is discharged, the shutter plate is automatically shielded to perform the above-described cleaning of the radiator. In this case, the engine load is smaller than when harvesting or traveling on the road, and
Since the work does not take a long time, overheating does not occur even if the radiator is not sufficiently cooled by the outside air.

[0008]

According to the first aspect of the invention, therefore, the dust adhering to the radiator cooling fins that has passed through the dustproof net can be easily removed by a simple operation only by moving the shutter plate, and the harvesting work is particularly interrupted. It is now possible to clean the radiator without it. As a result, it has become possible to avoid the interruption of the harvesting work for cleaning the radiator and improve the efficiency of the whole harvesting work.

In particular, according to the second aspect of the invention, since the radiator cleaning state is displayed in conjunction with the operation of the transmission clutch to the unloader, a special operation for cleaning is unnecessary and can be carried out more conveniently. Is. Moreover, since the radiator is cleaned in conjunction with the start and stop operations of the grain discharge work, which is a light load and is performed only for a relatively short time, there is no problem of insufficient cooling during cleaning.
It is highly convenient in practical use.

[0010]

Embodiments will be described below with reference to the drawings. Figure 4
As shown in FIG. 5, the combine has a threshing device 4 mounted on a machine body frame 3 equipped with a crawler traveling device 2, connects a cutting pretreatment unit 5 to a front part of the machine body so as to be vertically swingable, and The engine 1 is mounted on one lateral side of the vehicle, and the driver's seat 12 is arranged on the engine hood 6. A grain tank 7 for storing grains that have been threshed by the threshing device 4 is provided in a lateral portion of the threshing device 4, and the stored grain is arranged at the bottom of the grain tank 7. A bottom screw conveyor 21 and a vertical conveyor 22 Further, the unloader R composed of a side-feeding screw conveyor 23 which is capable of swinging and swinging and swiveling above and above the Glen tank 7 is used to discharge it out of the machine.

As shown in FIGS. 5 and 6, the rear end plate 25 of the engine 1 is provided with a bearing for supporting the output shaft 24 via an oil seal 27, and an inner portion of the bearing case cover 26 thereof. A cylindrical rib 26a is provided upright along the axial direction of the output shaft 24 at a position outside the oil seal.
It has a labyrinth structure that prevents mud from entering. A flywheel 28 is connected to the output shaft 24 by bolts. A ring gear 29 for starting an engine is attached to the outer peripheral portion of the flywheel 28, and the inner surface of the flywheel 28 is radially inward of the flywheel 28. A plurality of fins 30 are attached from the central portion toward the outer peripheral portion so as to have an inclination angle on the side opposite to the rotation direction, and thus the mud is blown away in the circumferential direction as the flywheel 28 rotates. , It is configured so that it is difficult to enter the seal area.

As shown in FIGS. 1 and 2, an engine cooling radiator 9 is provided on the outer side of the body of the engine 1, and an outside air intake portion 13 with a dustproof net 14 is provided on the outside thereof.
An air intake duct 11 provided with is provided for communication, and the outside air suctioned by the cooling fan 10 driven by the power from the engine 1 to remove dust from the outside air intake portion 13 passes through the radiator 9 to cool the outside air. It is configured to flow to the part. Immediately before the radiator 9 a plurality of ventilation holes 1
By providing the perforated plate 15 on which 7 is formed and imparting an appropriate flow resistance to the suction air from the outside air suction portion 13, the outside air is evenly sucked from the entire dustproof net 14 and is evenly distributed to the radiator 9. It is configured to ventilate air, thereby avoiding a decrease in suction force due to concentrated adhesion of dust to the central portion of the dustproof net 14.

Further, a ventilation state that allows suction of outside air from the ventilation holes 17 of the perforated plate 15 and a ventilation hole 17 of the perforated plate 15
A shutter plate 16 that can be operated to switch to a shielded state that blocks the suction of the outside air from the inside is disposed close to the perforated plate 15 in a superposed state. The shutter plate 16 is formed with ventilation holes 17 'having the same diameter as the ventilation holes 17 of the perforated plate 15 in the same array pattern. As shown in FIG. The ventilation state in which 17 ′ communicates with each ventilation hole 17 of the perforated plate 15 and the position of each ventilation hole 17 ′ of the shutter plate 16 and each ventilation hole 17 of the perforated plate 15 as shown in FIG. An operation mechanism 18 is provided for performing a slide change operation to an up and down position in a shielded state in which the air is sucked to prevent outside air suction.

The operating mechanism 18 is, as shown in FIG.
A spring 18a that biases the shutter plate 16 downward, a release wire 18b that pulls the shutter plate 16 upward against the biasing force of the spring 18a, and the release wire 1
8b, and this operating lever 19 is also used as a lever for operating a transmission clutch 20 for the unloader R in the Glen tank 7. When the operation lever 19 is operated to the clutch disengaged position, the release wire 18b is loosened and the shutter plate 16 is urged and lowered to enter the ventilation state. When the operation lever 19 is operated to the clutch engaged position,
The shutter plate 16 is forcibly lifted and switched to the shielding state.

[Other Embodiments] The shape, number, distribution, etc. of the air holes 17, 17 'of the perforated plate 15 and the shutter plate 16 are not particularly limited and can be set appropriately, for example, a rectangular shape. The holes may be formed in large numbers.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a radiator arrangement portion.

FIG. 2 is a plan view of a radiator arrangement portion.

3A is a front view of a perforated plate and a shutter plate in a communicating state, and FIG. 3B is a front view of a perforated plate and a shutter plate in a shielding state.

FIG. 4 is an overall side view of the combine.

FIG. 5 is a partially cutaway plan view of an engine output section.

FIG. 6 is a front view of the flywheel.

[Explanation of reference numerals] 9 radiator 10 fan 11 intake duct 13 outside air intake portion 14 dust-proof net 15 perforated plate 17, 17 'vent hole 16 shutter plate

Claims (2)

[Claims] 1. A fan (1) for cooling a radiator (9)
0) is provided with a dust-proof net (14) in the intake duct (11) for sucking outside air to form an outside air suction portion (13), and suction air from the outside air suction portion (13) is directed to the radiator (9).
A combined engine cooling device is provided immediately before the radiator (9) with a perforated plate (15) having a plurality of ventilation holes (17) for evenly ventilating the perforated plate (15). A shutter plate (16) that can be switched between a ventilation state that allows suction of outside air from the pores (17) and a shielding state that blocks suction of outside air from the ventilation holes (17) of the perforated plate (15). , The perforated plate (1
A combine engine cooling device that is closely placed in 5) in a superposed state. 2. An operating mechanism (1) for interlocking a transmission clutch (20) with the shutter plate (16) for an unloader (R) for discharging grains in a grain tank (7).
8) is provided, and when the clutch (20) is operated in the clutch disengaged state, the shutter plate (16) is switched to the ventilation state, and when the clutch (20) is operated in the clutch engaged state, the shutter plate (16) is shielded. The combine engine cooling device according to claim 1, wherein the engine cooling device is configured to be switched to a state.