KR100674054B1 - Engine cooling device and harvester having engine cooling device - Google Patents

Abstract

The radiator 13 which is a harvester equipped with the engine 7 in the traveling body 2, and which exchanges heat with the fan 16 and the engine which a cooling device of the engine rotates in conjunction with the output shaft 7a of the engine. In the case having the outside air intake 12 for injecting cooling air from the outside of the traveling body and the dustproof net 11 provided in the outside air intake, the blade 19 of the fan is switched to the cooling posture and the vibration damping posture. Possible posture changing means is provided, and in the cooling posture, a cooling wind directed to the engine or the radiator or both is generated from the dustproof network by rotating the fan in one direction, and the engine or the radiator or both by rotating the fan in one direction in the damping posture. The damping wind from the dust-proof net is generated.

Dustproof Net, Fan, Blade, Radiator, Windshield, Rotary Boss

Description

ENGINE COOLING DEVICE AND HARVESTER HAVING ENGINE COOLING DEVICE}

1 is a side view of an embodiment of a harvester according to the present invention, showing a combine as an example of a harvester.

2 is a longitudinal rear view of the bonnet;

3 is a transverse plan view of the bonnet;

4 is a front view of the engine.

Fig. 5 is a cut back view of the posture change means.

6 is a rear view of the fan.

Fig. 7 is a longitudinal rear view of the main portion showing the change of attitude of the blades;

8 is a plan view of an essential part showing the posture switching of a blade;

9 is an exploded perspective view of the main part of the posture change means.

Fig. 10 is a plan view of an essential part showing the posture switching of a blade according to another first embodiment of the present invention.

11 is a schematic plan view of another second embodiment of the present invention;

12 is a schematic plan view of another third embodiment of the present invention;

Fig. 13 is a schematic plan view of another fourth embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

11: dustproof network

12: outside air inlet

16: fan

18: rotating boss

19: blade

19a: Supungmyeon

19b: back side

22: rotating member

24: arm (equivalent to blade operation unit)

27: actuator

29: flanged bush

30 biasing means

The present invention relates to a harvester with an engine cooling device such as a combine. More specifically, the present invention relates to an engine cooling device configured to cool the engine by a rotatable fan in such a harvester.

In the engine cooling apparatus of this type of harvester, when blowing in the outside air as the cooling wind for engine cooling, dust such as straw flakes adheres to the dustproof net provided at the outside air intake port. If such adhered dust accumulates, there is a concern that clogging of the dustproof network may be caused and the blowing of the cooling wind may be inhibited. Thus, as an example of the prior art, by installing a forward and reverse switching mechanism in the electric system from the engine output shaft to the fan and driving the fan appropriately by the reverse switching mechanism, the dust attached to the dustproof network is blown out to remove the dustproof network. It was to try to eliminate the blockage of (see Japanese Unexamined Utility Model Publication No. 6-47630).

However, according to the prior art, the wind from the dustproof network to the engine or the radiator or both thereof (in this specification, this wind may be referred to as "cooling wind"), and the wind from the engine or the radiator or both to the dustproof network. (This wind may be referred to as "vibration damping" in this specification.) Was generated by forward and reverse switching of the fan rotation direction by a forward and reverse switching mechanism provided in the engine power transmission system to the fan. However, when such a forward and reverse switching mechanism is installed in the electric system, the electric system, and further, the entire cooling device, becomes larger, and the electric system is in a limited space from the engine output shaft to the fan rotation support shaft (fan drive support shaft). Since it is necessary to assemble and attach, assembly workability of the whole cooling apparatus was also bad.

Accordingly, an object of the present invention is to solve such disadvantages and to improve the workability of assembling.

A feature configuration of a harvester according to the present invention for achieving the above object is a harvester with an engine cooling device, wherein the engine cooling device is configured to cool the engine by a rotatable fan, by rotating the fan in one direction. And a posture changing means capable of switching and operating the blades of the fan into a first posture and a second posture that generate wind in the opposite directions to each other.

According to this characteristic configuration, when the switching operation between the first posture and the second posture is performed, the object of the change operation is the posture of the blade of the fan, and the rotational direction of the fan (rotational direction of the fan drive support shaft) as in the prior art. ) That is, in either of the first posture and the second posture, the fan rotates in one common direction.

In this way, since switching is unnecessary for the rotational direction of the fan, a large-scale mechanism for forward and reverse switching of the rotational direction of the fan in the space from the engine output shaft to the fan rotational support shaft (fan drive support shaft), unlike the prior art. Is omitted. Therefore, it becomes possible to make the said electric system and also the whole cooling apparatus more compact. In addition, the attachment workability can be improved as a whole.

It is further advantageous to provide a biasing means for rocking and pressing the blade of the fan to the first position in the above configuration.

In such a configuration, the blade is pushed toward the first posture even if the posture change means breaks down, for example, so that the engine cooling function can be maintained when the first posture is set to allow ventilation for cooling the engine. Moreover, this pressing means can be comprised, for example with the spring which oscillates and presses a blade to a 1st attitude | position.

About the specific structure of the said attitude change means, the following can be considered, for example.

In one embodiment of the present invention, the surface on the rear surface side of the wind receiving surface of the blade when in the first posture becomes the wind surface when the second posture is in the second posture.

In this embodiment, when the posture of the blade is switched, it is possible to prevent the blade from becoming a posture orthogonal to the rotational direction (a posture that increases the rotational resistance of the fan). Therefore, fan rotational resistance due to the blade posture switching Can be prevented from increasing. Therefore, the attitude of the blade can be changed while maintaining the rotational performance of the fan well.

In another embodiment of the present invention, the same surface as that of the blade when the blade is in the first posture is used as the surface when the blade is in the second posture.

In this embodiment, since the wind surface when it is in a 1st posture is made into the wind surface when it is in a 2nd posture, a wind can be produced strongly even when it is in a 2nd posture.

Further, in one example of the posture changing means, the posture changing means rotates integrally with the fan, and is capable of moving in the rotational axis direction, an actuator capable of moving the rotational member in the rotational axis direction, and It is provided with the arm mounted to the support shaft of the blade of a fan, and rocking | movement operation | movement linked with the movement in the rotation axis center direction of the said rotation member. The blade is configured to be switchable between the first posture and the second posture by the swinging motion of the arm.

In this characteristic configuration, since the blades are switched by the actuator, the blades can be reliably changed with a small maneuvering force even if the blades have a large resistance to the blades. That is, for example, in the case where the actuator is an electric motor, if the electric motor is configured to be turned on and off by a switch, the attitude of the blade can be reliably changed with only a small maneuvering force to the switch. It becomes possible.

Therefore, the blades can be switched in posture, and the switching operation in the reverse wind direction can be performed lightly.

Further, by moving the rotating member integrally rotated with the fan in the direction of the rotational axis, the arm mounted on the support shaft of the blade is swung to switch the blade posture, so that the blade operating portion of the posture changing means is an accessory of the compact fan. Can be configured. Therefore, since a part of the attitude change means can be handled as a fan, it can also be space-saving and easy to attach.

In addition, it is also advantageous in the following points that the rotating boss portion is formed in the fan so that the support shaft of the blade is prevented from falling out through the flanged bushing portion.

In this characteristic configuration, the support shaft of the blade is prevented from being pulled out through the flanged bush in the rotating boss of the fan, so that the support shaft is prevented from falling out by the flange of the bush so that the surface pressure for preventing the fall is reduced and the rotation of the support shaft is reduced and smoothly. I can do it.

Therefore, the attitude | position switching of a blade can also be performed smoothly and favorably.

In one suitable embodiment, the engine cooling apparatus includes a radiator for performing heat exchange with the engine, an outside air inlet for blowing cooling air from the outside of the traveling gas, and a dustproof network provided at the outside air intake. When the blade is switched to the first posture by the posture changing means, the fan is rotated in one direction in association with the output shaft of the engine, thereby cooling wind from the dustproof network toward the engine or the radiator or both. And the blade is rotated to the second posture by the posture changing means to rotate the fan in one direction in association with the output shaft of the engine, thereby preventing the dustproof network from the engine or the radiator or both. Configured to generate dehumidifying wind It can control.

According to this structure, when a blade is switched to a 1st attitude | position, it is possible to cool an engine or a radiator by a fan, and to be able to damp-proof the dustproof network by the fan in a 2nd attitude | position.

The present invention also relates to an engine cooling device having any of the above-described feature configurations.

Other features of the harvester and engine cooling device with an engine cooling device according to the present invention, and the operational effects and advantages exerted from such a configuration will become apparent by reading the following description with reference to the accompanying drawings.

EMBODIMENT OF THE INVENTION Hereinafter, one suitable embodiment of the harvester by this invention is described based on the combine which is an example of a harvester, referring drawings.

As shown in FIG. 1, in this combine, the harvesting | reaping part 3 which harvests a planting grain stem and conveys back to the front part of the traveling body 2 provided with the claw traveling apparatus 1 is connected so that lifting and lowering is possible. have. This traveling body 2 has a threshing apparatus 4 which threshes the grain stem from the said harvesting | reaping part 3, the tank 5 which stores the grain from this threshing apparatus 4, and the boarding driver 6 ) Is mounted. The tank 5 is located in the right and left bifurcation of the threshing apparatus 4, and the boarding driving part 6 is located in the front part of this tank 5. As shown in FIG.

In the boarding driver 6, the driver's seat 9 is supported on the upper part of the bonnet 8 in which the engine 7 is built, and the control tower 10 is provided at the front of the driver's seat 9. It is arranged.

2 to 4, the outside air inlet 12 provided with the anti-vibration net 11 is formed at one outer side plate portion in the left and right directions of the bonnet 8. A radiator 13 is disposed between the outside air intake 12 and the engine 7, and the radiator 13 is connected to the water pump 15 that performs liquid circulation between the engine 7 and the radiator 13. By this, heat exchange for cooling the engine cooling liquid returned from the engine 7 is performed. An engine cooling fan 16 is attached to a portion of the engine 7 that faces the radiator 13. The fan 16 is driven together with the water pump 15 via an electric belt 14 driven by the rotation of the output shaft 7a of the engine 7.

As shown in Figs. 5 and 6, the fan 16 includes a drive shaft 17 using a hexagonal shaft driven through the transmission belt 14, and a rotary boss portion which rotates integrally with the drive shaft 17. And a blade 19 mounted in plural in the circumferential direction with respect to the rotary boss portion 18 to cause wind along with the rotation.

Each of the blades 19 includes a support shaft 20 radially extended along the radial direction of rotation for attaching the blade 19 to the rotary boss portion 18, and a blade body fixedly attached to the support shaft 20. It consists of 21. Then, the blade 19 rotates around the support shaft 20, so that the cooling posture (an example of the first posture) shown in Figs. 7A and 8A and Fig. 7B is shown. It is possible to switch between the dustproof posture (an example of the second posture) shown in Fig. 8B.

In the cooling posture, with the rotation of the fan 16 in one direction, the wind passes in the order of the anti-vibration net 11 and the radiator 13, thereby generating wind to cool the radiator 13, thereby cooling the engine 7. This is done.

On the other hand, in the vibration damping attitude, the wind passes through the radiator 13 and the vibration damping net 11 in the reverse direction to the cooling attitude with the rotation of the fan 16 in the one direction, thereby adhering to the vibration damping net 11. Blows off dust, such as straw crumbs, to generate wind.

In the present embodiment, the surface on the rear side of the blade 19 is in relation to the water-permeable surface 19a when the blade 19 is in the cooling posture shown in FIGS. 7A and 8A. 19b) becomes a water-permeable surface when it is in the dustproof posture shown to FIG.7 (b), FIG.8 (b).

9, the attitude changing means for collectively switching the plurality of blades 19 will be described.

The drive shaft 17 is provided with a rotation member 22 which rotates integrally with the drive shaft 17 so as to be movable in the axial center direction. A part of this rotating member 22 is in the state which enters into the recessed part 18a of the said rotary boss part 18. As shown in FIG.

On the support shaft 20 of the blade 19, an arm 24 (corresponding to a blade operating portion) in which the pin-shaped engaging portion 23 is attached to the distal end is rotatably mounted. And the bifurcated arm operation part 25 is integrally formed in the rotating member 22. As shown in FIG. This operation part 25 couples with the said engaging part 23 by moving a setting range along the said axial direction, and rock the arm 24. As shown in FIG. By swinging the arm 24, the support shaft 20 of the blade 19 swings so that the blade 19 is switched between the cooling posture and the vibration damping posture.

The shift fork 26 is interlocked with the rotating member 22 so as to move in the axial direction. As shown in Fig. 5, this shift fork 26 (corresponding to a shift member) swings around an axial center (corresponding to a transverse center) X orthogonal to the drive shaft 17, whereby the rotation member 22 Move in the axial direction. Reference numeral 27 denotes an electric motor (an example of an actuator) which swings the shift fork 26 via the pinion gear 31a and the sector gear 31b.

The posture changing means further operates by being pressed against the sector gear 31b when the switch-type operation tool 28 for forward and reverse rotation operation of the electric motor 27 and the blade 19 are switched to the cooling posture. In contrast to the stop switch for cooling posture (corresponding to the first switch) 32 for stopping the motor 27, on the contrary, when the blade 19 is switched to the damping posture, it is pressed by the sector gear 31b to operate the electric motor ( It is comprised by providing the stop switch (equivalent to the 2nd switch) 33 for vibration damping attitude | position which stops 27). Reference numeral 30 denotes a spring (an example of the pressing means) which swings and presses the rotating member 22 and further the blade 19 in the cooling posture via the shift fork 26.

The blade 19 is supported by the rotating boss portion 18 by falling through the flanged bushing 29. In other words, the shaft center portion of the arm 24 having a larger diameter than the support shaft 20 is prevented from coming off the rotary boss portion 18 by slidingly contacting the flange of the flanged bushing 29.

In addition, the blade 19 is urged and urged in a cooling posture by a spring 30 as an example of the urging means.

Although not shown in the drawings, it is also preferable that monitor means for detecting an operation failure such as a failure of the electric motor 27 by a sensor and operating the notification device at the time of detection are incorporated.

[Other Embodiments]

As mentioned above, although one suitable embodiment of the harvester by this invention was described, this invention is not limited to this embodiment. For example, the following embodiments can be adopted.

(Other first embodiment)

In the above embodiment, the surface 19b on the rear surface side of the wind surface 19a of the blade 19 in the cooling posture [Fig. 8 (a)] is the water surface when the damping position [Fig. 8 (b)] is used. It was.

Instead, as shown in FIG. 10, the water-flow surface when the water-cooling surface 19a of the blade 19 in the cooling posture (FIG. 10 (a)) is in the damping position (FIG. 10 (b)). You may make it (19a).

(Other 2nd Embodiment)

In any of the embodiments shown in Figs. 7 and 8 and the embodiment (other first embodiment) shown in Fig. 10, the fan 16 is rotated in one direction in the cooling posture of the blade 19 of the fan 16. Cooling air is generated from the dustproof network 11 through the radiator 13 and the fan 16 toward the engine 7, while the fan 16 is rotated in the one direction in the damping position of the blade 19. The damping wind toward the dustproof net 11 from the radiator 13 generate | occur | produced. In other words, in the cooling posture, the cooling wind is configured to face both the radiator 13 and the engine 7.

Alternatively, in the cooling posture, the cooling wind may be configured to face either the radiator 13 or the engine 7.

As an example of the type in which the cooling wind is directed only to the radiator 13, the engine 7 is biased with respect to the fan 16 and the radiator 13 as shown in FIG. In this configuration, the cooling wind directed from the dustproof net 11 and the radiator 13 to the fan 16 does not come to the engine 7 even in the cooling posture indicated by the solid line of the blade 19, but the liquid after cooling with the radiator 13 The engine 7 is cooled (water cooled) by returning the engine to the engine 7 by the water pump 15.

11, the blade 19 in the damping position is shown by a broken line.

(Other 3rd Embodiment)

On the other hand, one example of the type in which the cooling wind is directed only to the engine 7 among the configurations described in the second embodiment described above is roughly shown in FIG. In the cooling attitude | position of the blade 19 in this structure, cooling of the radiator which is not shown in figure shows a part of the cooling wind toward the engine 7 from the dustproof network 11 via the fan 16, for example by a radiator. By branching to.

12, the blade 19 in the damping position is shown by a broken line.

(Other fourth embodiment)

In addition, as shown in FIG. 13, even if the position of the fan 16 and the position of the radiator 13 are replaced, the fan 16, the radiator 13, and the engine 7 are arranged in order from the dustproof network 11. FIG. good. In this configuration, in the cooling posture, not only the cooling wind generated from the fan 16 touches the radiator 13, but also the cooling wind passing through the radiator 13 also touches the outer wall of the engine 7. On the other hand, in the damping attitude, the damping wind generated from the fan 16 directly touches the dustproof net 11.

13, the blade 19 in the damping position is shown with a broken line.

(Other fifth embodiment)

In addition, the fan 16 as shown in each embodiment mentioned above can also be installed in the harvester equipped with the air-cooled engine without a radiator itself. In this case, the fan 16, the dustproof network 11, and the engine 7 can employ | adopt the arrangement similar to the other 3rd Embodiment shown substantially in FIG. 12, for example.

(Other sixth embodiment)

As the attitude change means, this shift fork 26 is used instead of the power machine operation type that operates the shift fork 26 for changing the attitude of the blade 19 as shown in Fig. 5 by the motor 27 or the like. ) May be a manual operation type that operates by manual force.

This configuration provides a dustproof network for an engine cooling device of a harvester in which assembly workability is improved.

Claims (9)

In the engine cooling device configured to cool the engine 7 by the rotatable fan 16, The fan 16 is composed of a drive shaft 17, a rotary boss portion 18 which is integrally rotatably supported by the drive shaft, and a plurality of blades 19 mounted on the rotary boss portion so that the attitude can be changed. By rotating the drive shaft 17 in one direction around its rotation axis, between the first posture for cooling the engine 7 and the second posture for generating wind in the reverse direction to the wind in the first posture. In the posture of the blade 19, the posture change means capable of switching the operation is provided, This posture changing means is provided with the actuator 27 and the rotating member 22 which were integrally rotatably supported by the said drive shaft 17 with the said rotary boss part 18, A blade operating portion is installed between the rotating member 22 and the rotating boss portion 18, In response to the relative movement between the rotary member 22 and the rotary boss portion 18 linked to the actuator 27, the respective blades 19 between the first and second positions via the blade operating portion. An engine cooling device, characterized by being configured to be switchable. 2. The blades (1) according to claim 1, wherein each of the blades (19) comprises a support shaft (20) for attaching the blade to the rotary boss portion (18) and a blade body (21) fixedly attached to one end of the support shaft. under, The blade operating portion includes an arm 24 attached to the other end of each of the support shafts 20, The respective support shafts 20 oscillate through the arm 24 by the relative movement between the rotary member 22 and the rotary boss portion 18, so that the respective blades are moved in the first and second postures. An engine cooling device, characterized by being configured to be switchable. A shift member (26) is provided between the actuator (27) and the rotating member (22), The shift member 26 oscillates around the horizontal axis X orthogonal to the rotation axis center of the drive shaft 17 by interlocking with the actuator, so that the dedicated rotation member 22 and the rotation boss portion ( 18) An engine cooling device characterized by being configured to be relatively movable between. The concave portion 18a of claim 1, wherein the concave portion 18a is opened in the rotation boss portion 18 in the direction of the rotation axis of the drive shaft 17. The rotating member (22) is inserted into this recessed part, The engine cooling apparatus characterized by the above-mentioned. The transmission belt 14 of Claim 1 which is provided between the engine 7 and the fan 16 by the rotation of the output shaft 7a of the said engine, The engine cooling apparatus according to claim 1, wherein the rotation of the one direction of the drive shaft (17) is performed in accordance with the driving of the drive belt in one direction. The water pump (15) according to claim 5, wherein a water pump (15) for cooling the engine (7) is provided on the side opposite to each of the blades (19) of the drive shaft (17), By the drive of the transmission belt (14), the water pump is driven while the drive shaft (17) rotates in the one direction. The posture changing means according to claim 1, further comprising: A first switch 32 which fixes the respective blades 19 to the first position by stopping the actuator 27, And a second switch (33) for fixing the respective blades (19) in the second position by stopping the actuator (27). The engine cooling device according to claim 1, wherein the engine cooling device includes an actuator 13 for performing heat exchange between the engines, an outside air inlet 12 for blowing cooling air from the outside of the traveling gas, and the outside air inlet. Equipped with a dustproof network 11 installed, In the case where the respective blades are switched to the first posture by the posture changing means, the fan is rotated in one direction in association with the output shaft 7a of the engine, thereby cooling toward the engine or the radiator or both. Wind is generated, In the case where the respective blades are switched to the second posture by the posture changing means, the fan is rotated in one direction in association with the output shaft 7a of the engine, whereby the engine or the radiator or both An engine cooling device, characterized in that it is configured to generate a damping wind toward the dustproof net. The harvester provided with the engine cooling device in any one of Claims 1-8.

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