JP4148954B2 - Engine cooling system - Google Patents

Description

  The present invention relates to an engine cooling apparatus, and more particularly to an apparatus that mechanically rotates a fan by interlocking the fan with an output shaft of an engine.

  In this type of engine cooling device, dust such as saw dust adheres to the dust proof net as the cooling air for cooling the engine is taken in, and clogs the dust proof net and inhibits the intake of the cooling wind. Therefore, conventionally, a forward / reverse switching mechanism is provided in the transmission system from the engine output shaft to the fan, and the fan is driven in the reverse direction as appropriate to blow away and remove the dust adhering to the dust screen so as to eliminate the clogging of the dust screen. (For example, refer to Patent Document 1).

Japanese Utility Model Publication No. 6-47630

The features / actions / effects of the engine cooling device according to the first aspect of the present invention are as follows. [Characteristic]
A fan for cooling the engine will be installed, and a dust screen will be installed at the cooling air intake. As the fan rotates, the wind is generated so that the wind passes through the dust screen in the engine cooling direction, and as the fan rotates, the wind passes through the dust screen in the opposite direction to the cooled state. The fan is configured to be switchable according to the dust removal state. The distance between the dust-proof net and the fan in the dust-removed state is narrower than the distance between the dust-proof net and the fan in the cooled state.

[Action]
When the engine is cooled by switching the fan blades to the cooling state, air is sucked from the entire surface of the dust-proof mesh facing the fan, and the dust-proof mesh can be prevented from being locally clogged with dust and other dust. On the other hand, when dust is removed from the dust screen by switching the fan blades to the dust removal position, the fan and dust screen are close to each other. it can.

[effect]
Therefore, both the engine cooling and the dust removal from the dust net can be performed well and reliably.

The features / actions / effects of the engine cooling device according to the second aspect of the present invention are as follows. [Characteristic]
A rotating boss that allows the fan blades to be switched between a cooling posture that generates a wind in a cooled state as the fan rotates in one direction and a dust removing posture that generates a wind in a dust-removed state as the fan rotates in one direction. By mounting on the fan, the fan can be switched between a cooling state and a dust removal state.

[Action]
By switching the orientation of the fan blades, the direction of the wind can be switched between the cooling direction and the dust removal direction without changing the fan rotation direction. No reverse switching mechanism is required.

[effect]
Therefore, the assembling workability of the configuration for switching the wind direction to forward and reverse can be improved.

The features / actions / effects of the engine cooling device according to the third aspect of the present invention are as follows. [Characteristic]
In accordance with the movement of the rotating boss portion in the direction along the rotation axis, an operating means for switching the fan blade between the cooling posture and the dust removing posture is provided.

[Action]
As the rotating boss part to which the fan blades are mounted moves in the direction along the rotational axis, the posture of the fan blades is switched. For example, the rotating boss part is integrated with the rotating boss part. Compared to switching the posture of the fan blades by moving the operating member arranged in a rotating state in the direction along the rotational axis, the operating member is moved along the rotational axis with a fork or the like. It is not necessary to provide an operation receiving portion that is continuously connected in a state of projecting outward from the rotating boss portion in the direction along the rotation axis to move the fan in the direction, and the width of the fan installation portion in the direction along the rotation axis Can be reduced.

[effect]
Therefore, the fan installation part can be made compact in the direction along the rotation axis.

  As shown in FIG. 1, the combine is connected to a traveling machine body 2, which is connected to a front part of a traveling machine body 2 provided with a crawler traveling device 1 so as to be able to move up and down. The threshing device 4 for threshing the cereal from the reaping unit 3, the tank 5 for storing the grain from the threshing device 4, and the boarding operation unit 6 are located on the left and right sides of the threshing device 4. The boarding operation part 6 is mounted in the front part of the tank 5 and is configured.

  The boarding operation part 6 has a structure in which a driver's seat 9 is mounted and supported on an upper part of a hood 8 in which an engine 7 is housed, and a control tower 10 is disposed in front of the driver's seat 9.

  As shown in FIGS. 2 to 4, a cooling air intake 12 with a dust net 11 stretched is formed on the left and right outer side plate portions of the bonnet 8, and the cooling air intake 12 and the engine 7 are connected to each other. In the meantime, a radiator 13 is disposed, and a portion of the engine 7 facing the radiator 13 is provided with an engine cooling fan 16 driven together with a water pump 15 via a transmission belt 14 by an output shaft 7 a of the engine 7. Is attached.

  As shown in FIGS. 5 to 9, the fan 16 has a plurality of circumferential directions that wind with rotation on a rotating boss portion 18 that rotates integrally with a driving shaft 17 that uses a hexagonal shaft that is driven via a transmission belt 14. The blades 19 are mounted. Each blade 19 includes a support shaft 20 for attachment to the rotary boss portion 18 in a posture along the rotational radius direction and a blade body 21 fixed to the support shaft 20. The blades 19 cool the radiator 13 by the wind passing through the dust-proof net 11 and the radiator 13 and the order of description as the fan 16 rotates in one direction due to the rotation of the support shaft 20 around its axis. The cooling posture that generates the wind and the rotation of the fan 16 in one direction reverses the direction of the radiator 13 and the dust net 11 and the wind passes in the order of description so that the dust and the like attached to the dust net 11 It can be switched to a dust removal posture that generates wind so as to blow away and remove dust. The blade 19 switches the posture so that the surface on the back side of the wind receiving surface 19a when in the cooling posture is the wind receiving surface when in the dustproof posture.

The operation means for collectively switching the posture of the plurality of blades 19 is configured such that the rotary boss portion 18 is movable in a set range in a direction along the axis of rotation, and is driven in a state where the rotary boss portion 18 enters the recess 18a. An operation member 22 that rotates integrally with the shaft 17 is provided in a fixed position in a direction along the axis of rotation, and a pin-like engagement is provided on an arm 24 that is attached to the inner end portion of the concave portion of the support shaft 20 of the blade 19 in an integrally rotated state. The joint portion 23 is fixed, engaged with the engaging portion 23, and the rotating boss portion 18 moves in the direction along the rotation axis, thereby swinging the arm 24 and moving the blade 19 between the cooling posture and the dust removing posture. A fork-like operation portion 25 that swings between them is formed on the operation member 22, and driving means for moving the rotating boss portion 18 along the rotation axis is provided.
Then, as shown in FIGS. 9A and 9B, the operating means places the rotating boss portion 18 at the first position p1 far from the radiator 13, that is, the dust net 11, to bring the blade 19 into the cooling posture. The blade 19 is placed in a dust removal posture by being positioned at the second position p2 close to the dust net 11.

  The drive means is provided with a spring 30 that moves and urges the rotary boss portion 18 toward the first position p1, and attaches the rotary boss portion 18 by swinging in one direction around an axis perpendicular to the drive shaft 17. A shift fork 26 that moves to the second position p2 against the force is provided, and an operation lever 32 for swinging the shift fork 26 against the bias via the wire 31 is formed on the operation lever 32. A drive pinion gear 34 that meshes with the sector gear 33 and swings the operation lever 32 against the bias is provided, and a geared motor 27 that is an actuator that rotates and holds the drive pinion gear 34 is provided. An operation tool 28 for operating the start switch 27 is provided, and the geared motor 27 corresponds to the first position p1 by operating the start switch of the operation tool 28. The first stop switch 35 that is pressed by the operation lever 32 to stop the geared motor 27 when rotated to the corresponding position and the geared motor 27 is moved to the second position p2 by operating the start switch of the operation tool 28. A second stop switch 36 that is pressed by the operation lever 32 to stop the geared motor 27 when rotated to the corresponding position side and to the corresponding position is provided.

Combine side view Longitudinal front view of engine cooling structure Cross-sectional plan view of engine cooling structure Front view of the engine Cutaway front view showing the operating means of the cooling fan Notched side view showing operating means of cooling fan Notched side view showing operating means of cooling fan Notched front view showing the movement of the main part of the operating means Plan view showing the movement of the main part of the operating means

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Dust-proof net 12 Cooling air intake 16 Fan 18 Rotating boss part 19 Fan blade

Claims (3)

A fan for cooling the engine is installed, and a dustproof net is installed at the cooling air intake.
As the fan rotates, the wind is generated so that the wind passes through the dust screen in the engine cooling direction, and as the fan rotates, the wind passes through the dust screen in the opposite direction to the cooling state. The fan is configured to be switchable to a dust removal state that generates
An engine cooling apparatus configured such that a distance between the dust-proof net and the fan in the dust-removed state is narrower than a distance between the dust-proof net and the fan in the cooled state.   The fan blades can be freely switched between a cooling posture that generates a cooled wind as the fan rotates in one direction and a dust removing posture that generates a dust-removed wind as the fan rotates in one direction. The engine cooling device according to claim 1, wherein the fan is configured to be switched between a cooling state and a dust removal state by being mounted on a rotating boss portion.   The engine cooling device according to claim 2, further comprising operating means for switching the fan blades between a cooling posture and a dust removing posture in accordance with the movement of the rotating boss portion in a direction along the rotation axis.

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