JPH0321295Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to an engine cooling system for a work vehicle such as a combine harvester or a harvester, and more particularly to a driving system for a cooling fan in a radiator disposed above the engine.

(b) Conventional technology In general, the width of work vehicles, especially combine harvesters, is regulated for legal reasons, and the engine is installed alongside the threshing machine, so there is no room in the direction of the engine's crankshaft, and the radiator is placed above the engine. It is being placed in

In this case, if a cooling fan is installed outside the aircraft (in front of the radiator) and the radiator is cooled by pushing air, the front of the radiator will not be sufficiently dust-proof due to the placement of the cooling fan drive belt, and dust such as rice straw will The radiator core is clogged with dust, and once the core is clogged, it is difficult to remove, leading to an early drop in cooling efficiency.

Therefore, a device has been devised in which a cooling fan is installed inside the aircraft body behind the radiator, the front surface of the radiator is sufficiently dust-proofed using a filter, etc., and the radiator is cooled by air sucked by the cooling fan.

(c) Problems to be solved by the invention However, in this device, a fan belt that drives a cooling fan is wrapped around the engine output pulley located inside the machine, in addition to the belt that drives the vehicle and the threshing machine. This makes replacing these belts very troublesome, and in cases where the engine is located at the rear of the machine, the fan belt travel path that runs upwards from the output pulley is used as the straw removal path from the threshing machine. This caused interference, and it was necessary to recess the straw removal guide plate (see chain line a in Figure 3). For this reason,
This hinders the discharge of the waste straw, causing the waste straw to be slanted and the binding position to be shifted, or the cutting length with the cutter to be longer than specified.

(d) Means for solving the problem The purpose of the present invention is to solve the above-mentioned problems, and as shown in Figs. The engine 12 is mounted on the engine 12, and above the engine 12,
The present invention relates to a work vehicle 1 in which a cooling fan 36 is located inside the body and a radiator 15 is installed.

An intermediate shaft 43 extending in the lateral direction of the aircraft body is located between the engine 12 and the radiator 15 in the vertical direction.
A belt 49 is stretched between a pulley 45 fixed to the outside of the intermediate shaft 43 and a pulley 16 fixed to the outside of the engine crankshaft 12a, and and the pulley 37 for driving the cooling fan.
The feature is that another belt 52 is stretched between the two.

(E) Effect Based on the above configuration, the rotation of the engine 12 is caused by the rotation from the pulley 16 at one end of the crankshaft 12a to the intermediate shaft 43.
The signal is transmitted to the pulley 45, and further guided into the interior of the fuselage by the intermediate shaft 43. The power is then transmitted from the pulley 46 at the inner end of the intermediate shaft 43 via the belt 52 to the cooling fan drive pulley 37, which rotates the cooling fan 36 to cool the radiator 15.

(f) Examples Examples of the present invention will be described below with reference to the drawings.

As shown in FIG. 4, the combine 1 has a machine body 3 supported by crawlers 2, and on one side of the machine body 3, a driver's seat 5, a grain tank 6, and an engine room 7 are arranged from the front. A threshing machine 9 and a straw removal device 10 are installed from the front on the other side of the machine body 3.
is mounted, and furthermore, a preprocessing section 12 is supported at the front of the fuselage 3 so as to be movable up and down.

In the engine compartment 7, there are
As shown in the figure, an engine 12 is mounted on a fuselage frame 3a with a crankshaft 12a oriented in the transverse direction of the fuselage, and a radiator 15 is disposed above the engine 12 by a frame 14. A sub output pulley 16 is fixed to the crankshaft 12a of the engine 12 at its outer end, and a main output pulley 17 is fixed together with a flywheel 19 to its inner end. Further, a fan shaft 20 located in the middle of the engine 12 is connected to a water pump inside the engine, and a pulley 21 and a fan 22 are fixed to the outside of the engine body. A belt 28 is wound around the sub output pulley 16. Further, an opening is formed in the outer wall 7a of the engine compartment 7 at a position facing the fan 22, and a wire mesh 24 is formed in the opening.
is stretched. Further, the main output pulley 17 of the engine 12 is connected to the thresher 9 as shown in FIG.
A belt 25 is stretched between the pulley 23 and the belt 25, and is interlocked with a transmission 27 via a belt transmission 26, as shown in FIG. On the other hand, as shown in detail in FIG. 1, a cylindrical body 30 is installed in a sealed manner between one side of the radiator 15 and a dust removal chamber 29 disposed on the outer side of the aircraft. A wire mesh 31 is stretched over the entrance of the dust removal chamber 29, and a filter 32 is disposed in the middle thereof, and a wire mesh 33 is also stretched over the opening of the dust removal chamber 29 located on the outside of the body. A cooling fan shaft 35 is rotatably supported by the frame 14 on the inside of the radiator 15, and a radiator cooling fan 36 and a fan driving pulley 37 are fixed to the fan shaft 35. ing. In addition, in the figure, 38 and 39 are radiator 1
5 and the engine 13. Reference numeral 40 denotes a tip-side guide plate of the straw removal device 10, which extends diagonally toward the rear of the machine and projects into the engine compartment 7, and is used to collect waste straw transported by the straw removal chain 41 into cutters, tying machines, etc. It leads to a post-processing machine 42.

Further, between the engine 12 and the radiator 15, an intermediate shaft 4 is mounted on the frame 14 in front of the engine compartment.
The intermediate shaft 43 has pulleys 45 and 46 fixed to the outer and inner ends of the intermediate shaft 43, respectively.
Between the outer end pulley 45 and the engine sub-output pulley 16 is a tension pulley 47 attached to the engine compartment rear frame 14.
A belt 49 is stretched around the fan shaft 20 to prevent interference with the fan shaft 20. Further, a belt 52 is stretched between the intermediate shaft inner end pulley 46 and the cooling fan drive pulley 36 through a tension pulley 51 that is tensioned by a spring 50.

On the other hand, as shown in detail in FIG.
is arranged side by side with the threshing machine 9 in the lateral direction of the machine body, and the upper wall 7b of the engine compartment 7 is constructed higher than the threshing machine upper wall 9a. The threshing machine side of the engine room upper wall 7b is inclined at a predetermined angle toward the threshing machine upper wall 9a, and a wire mesh or expanded metal 53 with a relatively coarse mesh is inserted into the opening formed in the inclined part. An air exhaust port 55 is attached and has a large opening area.

Since this embodiment has the above configuration, the rotation of the engine 12 is transmitted from the main output pulley 17 to the thresher 9 and the straw removal device 10 via the belt 25.
At the same time, it is transmitted to the transmission case 27 via the belt transmission device 26, and the combine harvester 1 runs. On the other hand, a fan 20 and a water pump are driven from a sub-output pulley 16 at the outer end of the crankshaft 12a via a belt 28, and cooling air is introduced from a wire mesh 24 to prevent a rise in temperature within the engine compartment 7.

The rotation of the sub-output pulley 16 is directly controlled by the outer end pulley 45 of the intermediate shaft 43 via the belt 49.
An intermediate shaft 43 which further extends in the lateral direction of the fuselage
The signal is transmitted to the pulley 46 inside the machine. Further, the signal is transmitted from the pulley 46 to the cooling fan drive pulley 37 via the belt 52, and the cooling fan 3
Rotate 6. At this time, as shown in detail in FIG. 3, since the pulley 46 is arranged in the front part of the engine compartment 7, the belt 52 runs at a predetermined interval d without interfering with the waste straw guide plate 40. I can,
Therefore, the straw removal guide plate 40 can be smoothly extended at a predetermined oblique angle without being recessed (dotted line a). As the cooling fan 36 rotates, suction air is generated on the back side of the radiator 15, and the cooling air is introduced into the dust removal chamber 29 through the wire mesh 33, further guided through the wire mesh 31 into the cylinder 30, and then into the filter 32. Thus, after almost completely removing dust, the clean cooling air cools the radiator 15. Furthermore, the exhaust air that has undergone heat exchange in the radiator 15 is smoothly discharged to the outside of the aircraft from the slanted large-area exhaust port 55 together with the exhaust air from the engine fan 22.

(g) Effects of the invention As explained above, according to the invention, the cooling fan 36 is disposed on the back of the radiator 15 to eliminate clogging of the radiator core. Since the driving force for the cooling fan 36 is extracted from the sub-output pulley 16 located on the outside, the main output pulley 1
The belts 17 and 26 for driving the threshing machine and driving the running system, which are wrapped around the belt 7, can be easily attached and replaced, and the belt 4 for driving the cooling fan can be easily installed and replaced.
Coupled with the fact that fan belts 9 and 52 are provided separately, it is easier to replace these fan belts 49 and 52, and there is less chance of belt breakage and pulley damage due to belt vibration etc. compared to a single belt. Trouble such as coming off can be reduced and maintainability can be improved.
Furthermore, the intermediate shaft 43 is arranged so that the running path of the cooling fan drive belt 52 does not interfere with other members.

[Brief explanation of the drawing]

Figure 1 is a view from the rear of the machine showing the engine compartment according to the present invention, Figure 2 is a side view thereof, Figure 3 is a partially cutaway plan view, and Figure 4 is a combine harvester to which the present invention is applied. FIG. 1... Work vehicle (combiner), 7... Engine room, 12... Engine, 12a... Crankshaft, 15... Radiator, 16... (Sub output)
Pulley, 36...Cooling fan, 37...Cooling fan drive pulley, 45, 46...Pulley, 49,
52...Belt.

Claims (1)

[Scope of Claim for Utility Model Registration] In a work vehicle, the engine is mounted with the crankshaft oriented laterally to the body, and a radiator is installed above the engine with a cooling fan located inside the body. A main output pulley is fixed to the inside of the body of the shaft, a sub-output pulley is fixed to the outside of the body of the crankshaft, and an intermediate shaft extending in the lateral direction of the body is arranged between the engine and the radiator in the vertical direction. Further, a pulley fixed to the outside of the intermediate shaft and the sub-output pulley are connected via a belt, and another pulley is connected between the pulley fixed to the inside of the intermediate shaft and the cooling fan drive pulley. An engine cooling system for work vehicles that has a tensioned belt.