JP2003175732A - Combine cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly cool a traveling gear case and a hydraulic continuously variable transmission, and to certainly remove dust and the like depositing in the traveling gear case, the hydraulic continuously variable transmission, and a muffler of the engine. <P>SOLUTION: An engine 7 is provided with an engine fan 9, and a hydraulic continuously variable transmission 4 above a traveling gear case 3 is provided with a hydraulic fan 6. The engine fan 9 and the hydraulic fan 6 send wind in the same direction to cool the hydraulic continuously variable transmission 4, the traveling gear case 3, and the muffler 7a of the engine 7, and remove depositing dust. The muffler 7a is provided in a ventilating passage, and an outer peripheral portion of the hydraulic fan 6 is provided so as to project out from upper, front and back end portions of the traveling gear case 3. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an engine,
An engine fan is provided, and a hydraulic fan is provided in the hydraulic continuously variable transmission above the running gear case. The engine fan and the hydraulic fan are blown in the same direction to provide a hydraulic continuously variable transmission. It is a technology provided to cool down and discharge accumulated dust and the like out of the machine, and can be used as a combine cooling device.

[0002]

2. Description of the Related Art When harvesting napped culms with a combine, when the engine is started, a transmission mechanism installed in a traveling gear case is rotationally driven via a hydraulic continuously variable transmission and the like. A traveling device provided under the traveling chassis is driven to rotate to travel. During this run, the grain stalks are mowed by a reaper provided in the front part of the traveling chassis, and this slaughtered grain culm is transferred to the upper rear part by this reaper and supplied to the thresher, and is sandwiched and transferred inside the thresher. Threshed inside.

During this mowing operation, the wind generated from the hydraulic fan provided on the input shaft of the hydraulic continuously variable transmission is
The air is blown toward the hydraulic continuously variable transmission, and the hydraulic continuously variable transmission and the traveling gear case are cooled,
While sandwiching and transferring the culm from the reaper to the thresher, the straw dust, dust, etc. that fall from the reaper are accumulated in the hydraulic continuously variable transmission, traveling gear case, engine muffler, etc. Some of the accumulated straw dust, dust, and the like are discharged to the outside of the machine.

[0004]

SUMMARY OF THE INVENTION The traveling gear case and the hydraulic continuously variable transmission are cooled by blowing air from a hydraulic fan provided on the input shaft of the hydraulic continuously variable transmission on the upper side of the traveling gear case, or , The traveling gear case, the hydraulic continuously variable transmission, and the dust and the like accumulated on the muffler of the engine are discharged to the outside of the machine, but a single hydraulic fan produces a small amount of air and does not send wind power. If it drops, the traveling gear case and the hydraulic continuously variable transmission may not be cooled reliably, the oil injected into them may become high in temperature, and this hydraulic continuously variable transmission may not operate accurately. In addition, because the accumulated straw dust and dust are not removed reliably, dust is blown up to the driver side, and further the straw dust and dust accumulated on the muffler catches fire, causing a fire. However, the present invention is intended to solve these problems.

[0005]

To this end, according to the invention as set forth in claim 1, the present invention provides a rotary drive engine 7, a traveling gear case 3 for traveling, and a traveling gear case 3 for each part. In a combine provided with a hydraulic continuously variable transmission 4 at an upper portion, an output shaft 8 of an engine 7 for cooling the traveling gear case 3, the hydraulic continuously variable transmission 4, etc., and discharging accumulated dust and the like out of the machine. Is provided with an engine fan 9 and a hydraulic fan 6 on the input shaft 5 of the hydraulic continuously variable transmission 4. The engine fan 9 and the hydraulic fan 6 are driven to rotate in the same direction. Then, the combine cooling device is provided so as to blow air in the same direction.

When harvesting napped culms with a combine, when the engine 7 is started, the traveling gear case 3
A transmission mechanism installed inside the traveling gear case 3 is rotationally driven via a hydraulic continuously variable transmission 4 provided on the upper part of the vehicle, and the traveling device provided below the traveling chassis is rotationally driven by the transmission mechanism. To do. During this run, the grain stalks are mowed by a reaper provided in the front part of the traveling chassis, and this slaughtered grain culm is transferred to the upper rear part by this reaper and supplied to the thresher, and is sandwiched and transferred inside the thresher. Threshed inside.

During the mowing operation, a hydraulic fan 6 axially supported by the input shaft 5 of the hydraulic continuously variable transmission 4 and an engine fan 9 axially supported by the output shaft 8 of the engine 7 are provided. And both are driven to rotate in the same direction, and the winds generated from the hydraulic fan 6 and the engine fan 9 are blown toward the hydraulic continuously variable transmission 4 in the same direction. Hydraulic continuously variable transmission 4 and traveling gear case 3
Means that the straw, dust, and the like that fall from the reaper while it is being cooled and being sandwiched and transferred from the reaper to the thresher are the hydraulic continuously variable transmission 4, the traveling gear case 3, and the engine. Although it is piled up on the muffler 7a of 7 and the like, the piled up straw dust and dust are discharged out of the machine.

According to the second aspect of the invention, the muffler 7a of the engine 7 and auxiliary parts are provided in the air blowing path for blowing air from the engine fan 9 and the hydraulic fan 6. The combine cooling apparatus according to claim 1.

During the mowing work, the engine fan 9 is used.
And the wind generated by the hydraulic fan 6 is sent to the hydraulic continuously variable transmission 4. By providing the muffler 7a of the engine 7 and auxiliary parts of the engine 7 in this air blowing path, the straw and dust accumulated on the muffler 7a of the engine 7 and accumulated on the muffler 7a of the engine 7 can be collected by the fan for these engines. 9 is sucked by the wind generated by the hydraulic fan 6 and discharged to the outside of the machine, and the muffler 7a and the like are cooled.

According to the third aspect of the invention, the outer peripheral portion (a) of the hydraulic fan 6 is provided so as to protrude from the upper end portion, the front end portion and the rear end portion of the hydraulic continuously variable transmission 4. The cooling device for a combine according to claim 1 or 2, characterized in that.

During the mowing operation, the outer peripheral portion (a) of the hydraulic fan 6 is provided so as to project from the upper end, the front end and the rear end of the hydraulic continuously variable transmission 4. The wind generated from the fan 6 and the engine fan 9 is
Air is blown toward the hydraulic continuously variable transmission 4, the hydraulic continuously variable transmission 4 and the traveling gear case 3 are cooled, and the hydraulic continuously variable transmission 4, the traveling gear case 3,
The straw dust accumulated on the muffler 7a of the engine 7 and the like are discharged to the outside of the machine.

[0012]

According to the invention described in claim 1, a hydraulic fan 6 provided on the input shaft 5 of the hydraulic continuously variable transmission 4;
Due to the synergistic effect of these two fans 6 and 9 with the engine fan 9 provided on the output shaft 8 of the engine 7, the amount of air blown can be greatly increased and the decrease in air blown wind can be prevented. Therefore, the hydraulic continuously variable transmission 4 and the traveling gear case 3 can be reliably cooled, and the cooling performance is improved. Further, it is possible to surely remove the dust and straw accumulated on the hydraulic continuously variable transmission 4, the traveling gear case 3, the muffler 7a of the engine 7, and the like.

According to the second aspect of the present invention, the muffler 7a of the engine 7 is disposed in the air blowing path for blowing air from the engine fan 9 and the hydraulic fan 6, so that the muffler 7a is piled up. Straws, dust, and the like are reliably sucked, removed, and cooled, so that a fire can be reliably prevented.

According to the third aspect of the present invention, the outer peripheral portion (a) of the hydraulic fan 6 is projected from the upper, front, and rear ends of the hydraulic continuously variable transmission 4 to form an exhaust system. Cooling efficiency is improved. Moreover, performance (torque) reduction can be prevented by cooling the starter.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. A hydraulic continuously variable transmission 4 is mounted on the upper side of the traveling gear case 3 provided at the front end of the traveling chassis 2 of the combine 1, and the hydraulic continuously variable transmission 4 is provided.
The input shaft 5 is provided with a hydraulic fan 6 rotatably supported. An engine 7 is provided above the traveling chassis 2.
The engine fan 9 is rotatably supported by the output shaft 8 of the engine 7. The hydraulic fan 6 and the engine fan 9 cool the traveling gear case 3, the hydraulic continuously variable transmission 4 and the like, and remove the straw dust, the dust and the like. These hydraulic fan 6 and engine fan 9
Will be mainly illustrated and described.

A traveling device 10 having a pair of left and right traveling crawlers 10a traveling on a soil surface is provided below the traveling chassis 2 of the combine 1 and above the traveling chassis 2 as shown in FIG. Is a configuration in which the thresher 11 is mounted. The mowing machine 13 on the front side of the traveling chassis 2 cuts the napped culms, and the shavings are transferred to the upper rear part by the reaping machine 13,
The feed chain 11a of the threshing machine 11 and the sandwiching rod 11b are taken over and threshed while being sandwiched and transported. The grains that have been threshed and have been sorted are temporarily stored in a grain storage tank 12 arranged on the right side of the threshing machine 11.

On the front side of the traveling chassis 2, as shown in FIG. 9, a narrow guide 14 for separating the napped culm from the front end position.
a, a sward body 14b, and a raising device 1 for raising a napped culm
5a, a scraping device 16a of a scraping and scraping transfer device 16 for scraping and transferring the raised crops, a cutting blade device 15b for cutting the scraped crops, and a sandwiching and transferring of the scraped crops. do it,
The reaper 13 is provided with a feed chain 11a of the threshing machine 11 and a root / ear tip transfer device 17b / 17c of the grain stalk scraping transfer device 16 delivered to the sandwiching rod 11b.
The reaper 13 is configured to move up and down with respect to the soil surface by a telescopic cylinder 18 driven by hydraulic pressure.

A support pipe rod 19b is provided in the left-right direction at the upper end of a support rod 19a inclined from the lower front portion to the rear upper portion of the reaper 13, and the support pipe rod 19b is provided on the upper side surface of the traveling chassis 2. The reaper 13 is rotatably supported by a support device 19c, and the reaper 13 is configured to rotate up and down with the support pipe rod 19b as the center of rotation by the operation of the telescopic cylinder 18.

In the grain culm transfer path formed by the grain culm scraping transfer device 16 of the reaper 13, the grain culm to be cut and transferred is brought into contact with the grain culm to be supplied to the thresher 11. This is a configuration provided with a grain culm sensor 13a for detecting the presence or absence of At the front part on the side of the thresher 11, as shown in FIG. 9, an operating device 20a for starting and stopping the combine 1 and adjusting each part, and a cockpit 20b on which an operator who carries out these operations is aboard. The engine 7 is mounted on the upper side surface of the traveling chassis 2 below the pilot seat 20b, and the grain storage tank 12 is disposed in the rear portion. The traveling device 10, the reaper 13, the thresher 11, the engine 7 and the like form a machine body 1a of the combine 1.

In the transmission path of the transmission mechanism 3a in the traveling gear case 3 mounted on the front end portion of the traveling chassis 2, the potentiometer type vehicle speed for detecting the traveling vehicle speed based on the output thereof is used. This is a configuration in which the sensor 3b is provided.
As shown in FIGS. 1 to 3, the traveling gear case 3 has a structure in which a hydraulic continuously variable transmission 4 is mounted on the upper side, and a detour transmission in which a transmission mechanism 21a is installed on one side. The case 21 is attached. The oil injected into the traveling gear case 3 circulates to the hydraulic continuously variable transmission 4 and is used as hydraulic oil.

The hydraulic continuously variable transmission 4 includes an input shaft 5, a hydraulic pump 5a, and a hydraulic motor 5 as shown in FIGS.
b and a swash plate 5c, etc., and the input shaft 5 has
The hydraulic fan 6 and the hydraulic pulley 6a are rotatably supported. As shown in FIGS. 1 to 3, an output pulley 8a for rotationally driving the hydraulic continuously variable transmission 4 and an engine fan 9 are rotatably supported on the output shaft 8 of the engine 7. A belt 6b for hydraulic pressure is stretched over a pulley groove in the central portion of the output pulley 8a and a hydraulic pulley 6a of the hydraulic continuously variable transmission 4, and the rotation of the engine 7 causes the belt 6b for hydraulic pressure to pass through. Thus, the hydraulic continuously variable transmission 4 is rotationally driven.

The engine fan 9 rotatably supported on the output shaft 8 of the engine 7 and the hydraulic fan 6 rotatably supported on the input shaft 5 of the hydraulic continuously variable transmission 4 are rotationally driven in the same direction. The winds generated from the engine fan 9 and the hydraulic fan 6 are configured to be blown in the same direction. By the air blown from both of them, the hydraulic continuously variable transmission 4, the traveling gear case 3 and the like are cooled, and the root and tip transfer devices 17a and 17b of the grain-and-crop transfer device 16 of the reaper 13 are moved to the upper rear part. Straws, dust, and the like that fall from the grain culms that are being pinched and transferred may fall and accumulate on the hydraulic continuously variable transmission 4, the traveling gear case 3, and the muffler 7a of the engine 7, etc. This straw dust, dust, etc. are discharged to the outside of the machine.

The winds generated from the hydraulic fan 6 and the engine fan 9 are blown in the same direction, and the amount of air blown is large due to the synergistic effect of these two fans 6 and 9. In addition to increasing the width, it is possible to prevent a decrease in the wind power to be sent, the hydraulic continuously variable transmission 4 and the traveling gear case 3 can be reliably cooled, and the cooling performance is improved. Further, it is possible to surely remove the dust and straw accumulated on the hydraulic continuously variable transmission 4, the traveling gear case 3, the muffler 7a of the engine 7, and the like.

In the air passage (b) for blowing the wind generated from the hydraulic fan 6 and the engine fan 9,
As shown in FIG. 1, the muffler 7a of the engine 7, the manifold 7b which is an auxiliary component of the engine 7, the starter 7c, and the like are located and provided.

A muffler 7a of the engine 7, a manifold 7b, a starter 7c, etc. are provided in the air passage (b) for blowing the wind from the hydraulic fan 6 and the engine fan 9. As a result, it is possible to prevent the ignition of dust and the like accumulated in the muffler 7a, the manifold 7b, the starter 7c, etc., and thus prevent the occurrence of a fire. Moreover, since the entire muffler 7a having a long overall length can be cooled, a high cooling effect can be exerted.

The outer peripheral portion (a) of the hydraulic fan motor 6 rotatably supported on the input shaft 5 of the hydraulic continuously variable transmission 4 has an upper end portion (c) of the hydraulic continuously variable transmission 4 as shown in FIG. The front end (2) and the rear end (e) are provided so as to project outward by a predetermined dimension. The charge valve 22a provided inside the hydraulic continuously variable transmission 4 and the neutral orphis 2
2b and the upper return port 23a provided at the upper end (c) of the hydraulic continuously variable transmission 4 are the outer peripheral portion of the hydraulic fan 6 of the hydraulic continuously variable transmission 4 as shown in FIGS. (A) It is a structure arranged inside. 24a and 24b are left and right push cylinders, 25a is an electromagnetic switching valve, 25b is a switching valve, 26
Is a hydraulic pump, 27a and 27b are line filters, 28
Is a power steering lever, and 29a and 29b are relief valves. A control arm 30 is provided on the front side of the hydraulic continuously variable transmission 4.

The outer peripheral portion (a) of the hydraulic fan 6 is provided at upper, front and rear end portions (c), (d) of the hydraulic continuously variable transmission 4.
By being provided so as to project from the position (e), the cooling efficiency on the exhaust system (return) side can be improved. or,
By cooling the starter 7c, it is possible to prevent the performance (torque) from decreasing. Further, the oil passing through the neutral orphis 22b portion generates heat here, but the cooling efficiency can be improved by cooling this portion.

The upper end (C) of the hydraulic continuously variable transmission 4
And an upper return port 23a provided on the side of the traveling gear case 3 and a lower return port 23b provided on the bypass transmission case 21 on the side of the traveling gear case
1, 6 and 7, an oil cooler 31 made of a circular pipe material is provided between and, and the oil cooler 31 has a predetermined length in the front-rear direction and a predetermined interval in the vertical direction. This is a structure formed in multiple stages. The arrangement position is located outside the engine fan 9 of the engine 7, and
It is provided so as to be located in the air passage (b) of this engine fan 9, and further at the lower part of the inlet funnel 11d which is provided below the handling cylinder 11c of the threshing machine 11 so as to project toward the entrance of the grain stem. It is the structure provided.

As a result, the hydraulic oil that circulates in the oil cooler 31 is cooled by the air blown from the engine fan 9 and has a great cooling effect, and also the straw dust and dust accumulated on the oil cooler 31. Can be removed. Further, due to the clogging or the circular pipe shape, it is possible to prevent the accumulation of straw dust and dust.

The starter 7c of the engine 7 is provided facing the hydraulic fan 6 as shown in FIG. 1, and the exhaust manifold 7b of the engine 7 is on the left side of the hydraulic fan 6 as shown in FIG. The starter 7c and the manifold 7b are provided in the fan 6 for the hydraulic pressure and the air passage (b) for blowing air from the fan 9 for the engine, and are cooled by suction air sucked by the fans 6 and 9. At the same time, it is configured to suck and remove the accumulated straw dust and dust.

As a result, the starting torque can be increased by cooling the starter 7c.
Further, by cooling the manifold 7b, it is possible to prevent the occurrence of fire by lowering the surface temperature of the exhaust system and removing straw dust and dust. The oil in the traveling gear case 3 is supplied from the traveling gear case 3 to the hydraulic continuously variable transmission 4 as shown in FIGS. 1, 6 and 8, and the upper return port 23a of the hydraulic continuously variable transmission 4 is supplied. , Oil cooler 3
First, it is supplied to the inside of the bypass transmission case 21 through the lower return port 23b, and is supplied to the traveling gear case 4 through the downflow hole 21b of the bypass transmission case 21. This circulation is repeated, and the oil in the traveling gear case 3 is used as oil for hydraulic pressure of the hydraulic continuously variable transmission 4.

Although the oil reaches the maximum temperature when passing through the hydraulic continuously variable transmission 4, the oil circulated downward from the bypass transmission case 21 into the traveling gear case 3 by the air blow from the hydraulic fan 6. It is configured to cool. This allows
Oil in the traveling gear case 3 and the hydraulic continuously variable transmission 4
It can be used in common with the oil for hydraulics, which reduces the cost. Further, the oil that has reached the maximum temperature in the hydraulic continuously variable transmission 4 is cooled by the air blow from the hydraulic fan 6 while flowing down from the detour transmission case 21 into the traveling gear case 3, so that the oil is highly cooled. It can be effective.

The hydraulic continuously variable transmission 4 is provided with a hydraulic pulley 6a on the input shaft 5 of the hydraulic continuously variable transmission 4 as shown in FIGS.
And a groove at the outer end portion of the output pulley 8a provided on the output shaft 8 of the engine 7, the hydraulic belt 6b is stretched over, and the rotation of the engine 7 causes the hydraulic continuously variable transmission 4 to move.
Is a configuration for operating. Also, this hydraulic continuously variable transmission 4
A hydraulic pump 5a and an output shaft 5d are rotatably provided on the port block side 4a, and a hydraulic fan 6 is rotatably rotatably supported at the shaft end of the output shaft 5d.

As a result, the hydraulic pump 5a is provided on the port block side 4a of the hydraulic continuously variable transmission 4, and the hydraulic fan 6 is provided outside (in the vicinity of) the hydraulic pump 5a.
Since the oil for hydraulic pressure rises to a high temperature in the hydraulic pump 5a due to the provision of the above, by cooling the oil that rises to this high temperature by blowing air from the hydraulic fan 6 provided in the vicinity, The cooling effect is high and effective cooling is possible. Further, since the hydraulic pump 5a has an open circuit in which oil is constantly flowing, cooling this portion has a high cooling effect.

The reaping input shaft 1 installed in the support pipe rod 19b of the support rod 19a for rotatably supporting the reaper 13.
9d includes a reaping input pulley 1 as shown in FIGS.
3b is rotatably supported, and a reaping suction fan 32 is rotatably supported outside the reaping input pulley 13b. The mowing input pulley 13b and the mowing suction fan 32 are arranged substantially in the air passage (b) for blowing air from the hydraulic fan 6.

The reaping input pulley 1 of the reaping input shaft 19d
3b and the mowing output pulley 33a pivotally supported by the mowing output shaft 33 provided on the traveling gear case 3, the mowing belt 33
It is a configuration in which b is multiplied. The transmission mechanism 3a in the traveling gear case 3 is rotationally driven to rotationally drive the reaper 13 via the reaper belt 33b, the reaper input shaft 19d, and the like.

The reaper suction fan 32 suction-assists the air blown from the hydraulic fan 6 to lower the temperature in the vicinity of the cockpit 20b, and the cooling efficiency of the running gear case 3 and the hydraulic continuously variable transmission 4 is improved. This is an improved configuration. The hydraulic pulley 6a and the reaping input pulley 13a have a structure in which an outer diameter portion having a belt groove as shown in FIG. 14 and an inner diameter portion for axial support are connected by respective connecting arms 34. Each connecting arm 34 is provided with a twist angle that can be twisted at a predetermined angle, and this screw angle improves the air blowing ability and the suction ability.

A reaping suction fan 32 for suction is provided in the air passage (b) for blowing from the hydraulic fan 6 of the hydraulic continuously variable transmission 4, and a hydraulic pulley 6a and
By providing the screw angles on the connecting arms 34, 34 with the reaping input pulley 13b, it is possible to prevent a temperature rise in the vicinity of the cockpit 20b, and to improve the cooling effect of the hydraulic continuously variable transmission 4 and the traveling gear case 3. I was able to improve.

On the rear side of the grain storage tank 12 for discharging the grains stored in the grain storage tank 12 to the outside of the machine,
A discharge support cylinder 35 having a vertical transfer helix 35a installed therein is rotatably mounted in a substantially vertical posture. At the upper end of the discharge support cylinder 35, the entire length extends to the outside of the combine 1 in the longitudinal direction. The discharge helix 36a that discharges the discharge spiral 36a is arranged in the front-back direction so as to be expandable and contractible, rotatable up and down, and rotatable left and right.

[Brief description of drawings]

FIG. 1 is an enlarged plan view of a hydraulic fan unit and an engine fan unit.

FIG. 2 is an enlarged side view of a hydraulic fan unit and an engine fan unit.

[Figure 3] Transmission mechanism diagram

FIG. 4 is an enlarged side view of a mounting portion of a hydraulic fan.

FIG. 5 is an enlarged front view of a hydraulic continuously variable transmission.

FIG. 6 is an enlarged circuit diagram of a hydraulic continuously variable transmission.

FIG. 7 is an enlarged side view of an oil cooler portion of the hydraulic continuously variable transmission.

FIG. 8 is an enlarged front view of a circulation path of hydraulic oil for a hydraulic continuously variable transmission.

[Fig. 9] Overall side view of the combine

FIG. 10 is a view showing another embodiment, and is a front view of a hydraulic continuously variable transmission unit.

FIG. 11 is a side view of a hydraulic continuously variable transmission unit showing another embodiment.

FIG. 12 is a view showing another embodiment, and is a front view of the hydraulic continuously variable transmission unit and the support portion of the reaper.

FIG. 13 is a view showing another embodiment, in which a hydraulic fan unit,
And enlarged side view of the mowing suction fan section

FIG. 14 is a view showing another embodiment, which is an enlarged front sectional view of a hydraulic pulley and a reaping input pulley.

[Explanation of symbols]

3 running gear case 4 Hydraulic continuously variable transmission 5 input axes 6 Hydraulic fan 7 engine 7a muffler 8 output axes 9 Engine fan (A) Outer periphery

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) F01P 1/06 F01P 1/06 K F term (reference) 2B074 AA02 AB01 AC02 AD05 BA19 CD02 CD10 DA01 DA02 DB03 DD02 DF03 DF06 GJ02 2B076 AA03 DA02 DA15 3D038 AA09 AB05 AC23 3D039 AA03 AA04 AA18 AA20 AB13 AC49 AD02 AD11 AD43

Claims (3)

[Claims] 1. A combine in which each part is provided with a rotary drive engine 7, a traveling gear case 3 for traveling, and a hydraulic continuously variable transmission 4 is provided above the traveling gear case 3,
The engine fan 9 and the hydraulic continuously variable transmission 4 are connected to the output shaft 8 of the engine 7 that cools the traveling gear case 3, the hydraulic continuously variable transmission 4, and the like, and discharges accumulated dust and the like out of the machine. The input shaft 5 is provided with a hydraulic fan 6, and the engine fan 9 and the hydraulic fan 6 are provided so as to be rotationally driven in the same direction and blow in the same direction. Combine cooling system. 2. The muffler 7a of the engine 7 and auxiliary parts and the like are provided in a blowing path for blowing air from the engine fan 9 and the hydraulic fan 6. The combine refrigerator described. 3. The outer peripheral portion (a) of the hydraulic fan 6 is
The combine cooling apparatus according to claim 1 or 2, wherein the hydraulic continuously variable transmission 4 is provided so as to project from an upper end portion, a front end portion, and a rear end portion.