JPH0325534Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a combine harvester in which an engine bonnet is disposed on the side of a threshing device having a dust exhaust port on the rear end surface.

[Conventional technology]

Conventionally, in this type of combine harvester, a radiator is placed behind the engine in the longitudinal direction of the machine.
The structure is such that exhaust air from the radiator is discharged through an exhaust outlet provided on the rear end surface of the engine bonnet, and the dust discharged from the threshing section dust outlet is There was a device that exerted an air curtain effect with the exhaust air from the radiator to prevent early clogging of the radiator inlet (Utility Model Opened in 1988).
Publication No. 77347).

[Problem that the invention attempts to solve]

Although it is certainly possible to obtain an air curtain effect with the conventional configuration, the direction of exhaust air from the radiator is horizontal at a height approximately equal to the installation height of the radiator. Until the phenomenon in which the dust discharged from the dust exhaust port once falls to the ground, resurfaces, and attaches to the air intake port provided on the side of the engine bonnet, the dust wraps around. I couldn't stop it.

An object of the present invention is to provide an engine that can effectively utilize the original components provided in the engine bonnet to suppress the inflow of dust particles from below.

[Means for solving problems]

The characteristic configuration of the present invention is that an engine bonnet is disposed on the side of the thresher that has a dust exhaust port on the rear end surface, and within this engine bonnet, there is an engine, and a radiator is placed behind the engine in the longitudinal direction of the machine. , and a muffler is disposed at the tip of a pipe that extends rearward from the engine, bypassing the radiator, and exhausts air from the radiator through an air exhaust outlet provided on the rear end surface of the bonnet, and The exhaust pipe outlet of the muffler is located below the radiator exhaust outlet so that engine exhaust gas is discharged outside the bonnet, and its effects are as follows.

[Effect]

In other words, focusing on the fact that the muffler is located inside the engine bonnet and behind the radiator, and is arranged so that the exhaust air from the radiator provides a cooling effect, the exhaust pipe from the muffler By installing the outlet below the exhaust outlet, the engine exhaust from the exhaust outlet can be applied to a range below the radiator exhaust air blowing range from the exhaust outlet, and the radiator An air curtain effect can be exerted on the dust particles that try to bypass the lower part of the exhaust air and go around to the side of the bonnet.

[Effect of idea]

As a result, by simply modifying the settings of the exhaust outlet of the muffler, which is normally installed under the hood, an air curtain effect can be created that organically links the exhaust air from the radiator and the exhaust from the muffler. This makes it possible to prevent early clogging of the suction port without providing a shielding plate.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

A crawler traveling device 1 is provided, a threshing device 2 is mounted with its dust exhaust port 2A opening toward the rear, and a side portion of the threshing device 2 is covered with an engine bonnet 3 at a position adjacent to the side thereof. This machine 7 is equipped with an engine 4 with an anti-vibration mechanism 6 and a driver's seat 5 with the engine 4 located behind the driver's seat 5.
A reaping pre-processing section 8 for reaping the planted grain culm and conveying and supplying it to the threshing device 2 is connected to the front part of the culm to constitute a full culm input type combine harvester.

A radiator 9 for cooling the engine is disposed in the engine bonnet 3 at a rear position of the engine 4 where the transmission counter case 4A protrudes forward. 3 parts are dustproof (dust removal)
A cooling air intake port 10 with a mesh is formed on the rear side of the engine bonnet 3, that is, on the lateral side of the dust exhaust port 2A, and on the side of the dust exhaust port 2A.
At a location near A, there is a dust prevention (dust removal) opening that opens toward the rear so that the cooling air after passing through the radiator 9 flows and is discharged in parallel to the dust exhaust direction from the dust exhaust port 2A.
A mesh-covered cooling air outlet 11 is formed. A dustproof (dust removal) net 13 is provided between the radiator 9 and an engine-driven cooling fan 12 located in front of the radiator 9.
is a slit 14 formed on the side plate of the dustproof cover 3.
It is configured so that it can be extracted laterally and outwardly through the.

A muffler 15 is disposed on the side of the cooling air outlet 11 of the radiator 9, and is connected to the exhaust manifold 4B of the engine 4 via a fixed pipe 16. Furthermore, the muffler 15 is supported and fixed at two lower locations in the longitudinal direction by vibration isolating mechanisms 17, 17 made of plate rubber, which are opposed to each other and inclined from the vertical direction, and are supported by the same vibration isolators. This is designed to prevent the influence of vibrations from the engine 4. The vibration isolating mechanisms 17, 17 have four through bolt holes 17A into which collars 17a are fitted and held, and are connected and fixed to a muffler side mounting bracket 18 and a body frame side support bracket 19.

The exhaust pipe 20 of the muffler 15 extends rearward, and the outlet 20A of the exhaust pipe 20 is set to be located at the opening 21 provided below the cooling air outlet 11, and the exhaust direction of the outlet 20A is is set so that it faces diagonally downward.

Therefore, the cooling air from the exhaust port 11 can prevent the exhaust from the dust exhaust port 2A from going around to the side of the engine bonnet 3, and prevent the upward flow from below that detours from near the ground. Also, the engine exhaust gas can be prevented from running around to the lateral side of the bonnet 3, and the air curtain effect can be fully exerted.

[Another example]

B. The outlet 20A of the exhaust pipe may protrude from the opening 21, as long as it discharges the exhaust gas downward from the cooling air of the radiator 9.

[Brief explanation of drawings]

The drawings show an embodiment of the combine harvester according to the present invention, FIG. 1 is an overall perspective view, FIG. 2 is an overall plan view,
FIG. 3 is a sectional view of the inside of the engine bonnet, FIG. 4 is a side view showing the muffler support structure, and FIG. 5 is a perspective view showing the vibration isolation mechanism. 2... Threshing device, 2A... Dust exhaust port, 3... Engine bonnet, 4... Engine, 9... Radiator, 11
...Exhaust outlet, 15...Muffler, 16...Piping, 20
...Exhaust pipe, 20A...exit.

Claims (1)

[Scope of utility model registration request] An engine bonnet 3 is disposed on the side of the threshing device 2 having a dust exhaust port 2A on the rear end surface, and an engine 4 is installed in the engine bonnet 3, and a radiator is installed on the rear side of the engine 4 in the longitudinal direction of the machine. 9,
Additionally, a muffler 15 is installed at the tip of a pipe 16 that extends backward from the engine 4, bypassing the radiator 9.
is arranged so that the exhaust air from the radiator 9 is discharged through the exhaust outlet 11 provided on the rear end surface of the bonnet 3, and the exhaust pipe 2 of the muffler 15 is
0 outlet 20A is connected to the exhaust outlet 11 for the radiator 9.
A combine harvester located below the bonnet 3 and configured to discharge engine exhaust outside the bonnet 3.