JPS62179306A - Front mower - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a front mower for mowing lawns, which is mounted on the front side of a traveling vehicle.

(Prior art) As a cooling device for a work vehicle such as a tractor, for example, the method disclosed in Utility Model Application No. 56-11177 (Utility Model Application No. 54-93601)
The method described in Japanese Patent Publication No. This conventional vehicle has an engine at the front in the direction of travel, a pilot's seat behind it, a radiator and a fan in front of the engine, and the fan blows air from the front to the rear.

On the other hand, as a front mower, for example,
What is described in the specification and drawings of No. 70604 is publicly known. This front mower had a driver's seat at the front in the direction of travel, an engine mounted behind it, and a mower attached to the front.

The cooling device for such a front mower is the same as the cooling device for the tractor.

In other words, inside the rear bonnet of the front mower,
An engine, a radiator, and a fan were arranged, and the fan sucked in cooling air from the rear end of the bonnet and discharged it to the front side of the engine through the radiator.

That is, the conventional front mower cooling device discharges hot air toward the cockpit.

(Problems to be Solved by the Invention) In the conventional type, hot air was discharged toward the cockpit, resulting in a poor driving environment.

In addition, in the conventional type, the cooling air was sucked in from the front end face of the bonnet, so there was a limit to the area of the ventilation holes on the front end face, the flow rate was high, and the dustproof performance was deteriorated.

Therefore, in order to solve the above problems, the applicant of the present application has already published Utility Model Application No. 60-144333 and Utility Model Application No. 60-144.
In No. 334, a front mower equipped with a front suction and rear discharge type cooling device was proposed.

However, in the above-mentioned novel front mower, a problem has arisen in that dust generated from the cut grass discharge port of the morph enters through the air intake port and tends to clog the radiator.

Therefore, an object of the present invention is to provide a front mower that can prevent clogging of the radiator and improve the cooling effect.

(Means for solving the problems) In order to achieve the above object, the present invention takes the following measures. That is, the present invention is characterized in that, in a front motor equipped with a morph mounted on the front side of the cockpit and a bonnet covering the engine on the rear side thereof, a rear discharge type radiator fan is provided in the bonnet, Moreover, among the air intakes provided on the left and right side panels of the bonnet, the grass clippings discharge side of the morph is formed into a narrower air intake than the non-discharge side.

(Function) According to the present invention, the air generated by the fan flows from the front to the rear. Therefore, the hot air after cooling the radiator is discharged rearward from the rear end surface of the bonnet, so that the hot air does not hit the driver in the front.

In addition, the cooling air is sucked into the bonnet 7) through the air intake on the bonnet side plate, but the air intake on the grass clippings discharge side of the Morph is finer than that on the non-release side, so The discharged dust is removed through the same intake port.

Therefore, the cooling air becomes clean and clogging of the radiator is prevented.

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2, a front mower 1 according to the present invention is mainly composed of a self-propelled vehicle 2 and a morph 3 suspended from the front part of the vehicle 1 so as to be able to rise and fall.

The morph 3 has three sets of rotary blades 4, and has three sets of rotary blades 4 in the vehicle width direction (hereinafter referred to as
The cut grass discharge port 5 is provided on the - side (referred to as the "left-right direction").

The lawn mowed by the rotary blade 4 is discharged to the side X from this grass clipping discharge port 5 by the airflow caused by the rotary blade 4.

The self-propelled vehicle 2 has a driving deck 6, a steering wheel 7, and a driver's seat 8 at the front, and an engine 10 covered with a bonnet 9 at the rear. A transmission case 11 is attached to the front part of the engine 10 to form a vehicle body. A hydraulic continuously variable transmission is built into the mission case 11.

The power of the engine 10 is transmitted from the mission case 11 to the front wheels 13 via the front wheel differential device 12, and is also transmitted to the rear wheel differential device 15 via the connecting shaft 14 from the middle of the mission case 11, and further to the rear wheel differential device 16. is transmitted to.

Furthermore, the power of the engine 10 is transferred to the PTO which protrudes from the front end surface of the vehicle body.
! The signal is transmitted from the dl17 to the morph 3 via the transmission shaft 18. Note that the rear wheel 16 is used as a steering wheel and is linked to the steering wheel 7.

As shown in FIGS. 3 to 5, inside the bonnet 9,
A radiator 19 is arranged at the rear, a fan 20 is arranged in front of the radiator 19, an engine 10 is arranged in front of the fan 20, and a fuel tank 21 is arranged in front of the engine 10.

The bonnet 9, which covers the engine 10, the radiator 19, etc., has a lower rear end pivotally supported by a rear axle frame 22, and a top plate portion 23 and a rear end surface 24 that can be rotated. The side plate 25 of the bonnet 9 is removable.
5 is provided with an air intake port 26, and the air intake port 26 is covered with a dustproof net or punched metal 27 or the like. Also,
The bottom of the bonnet 9 is also covered with a bottom plate 28. This bottom plate 28 is also provided with an air intake port and covered with an anti-N net or the like. A rear end surface 24 of the bonnet 9 serves as a cooling air outlet.

The mesh size of the dustproof screen or punching metal 27 provided at the air intake port 26 is made smaller on the side of the grass clippings discharge port 5 of the mower 3 than on the non-discharge port side. There is. In other words, the air intake port 26 on the side without the grass clippings discharge port is made larger.

Note that 29 is an air cleaner, 30 is a muffler, and 31 is an exhaust pipe. The muffler 30 is directly attached to the engine 10. The exhaust pipe 31 of the muffler 30 is bent downward inside the bonnet 9, passes through the bottom plate 28, and then bent rearward, and the exhaust port 32 of the exhaust pipe 31 is connected to the radiator fan 2.
It is located behind 0.

According to the embodiment of the present invention, the air generated by the fan 20 flows in the direction of the arrow a in FIG. At this time, Moryo 3
The grass clippings are discharged from the discharge port 5 in the direction of the arrow X, and dust is thrown up on this side. These dusts try to be sucked in through the air intake port 26, but since the mesh of the intake port 26 on the same side or the openings of the punched metal 27 are small, intrusion of the dust is prevented.

However, since the eye on the opposite side is large, there is no shortage of air intake.

Furthermore, since the above embodiment uses an internal muffler, the exhaust direction of the muffler 30 and the exhaust direction of the fan 20 are the same with respect to the cutting direction of the front mower, making it difficult for the fan 20 to suck in warm air. , without impairing the cooling effect. Also, since it is an internal type, turning performance is improved.

Note that the present invention is not limited to the above embodiments.

(Effects of the Invention) According to the present invention, since the rear discharge type radiator fan is provided, the hot air is discharged rearward from the rear end face of the bonnet, so the hot air does not hit the driver in the front, thereby improving the driving environment. becomes better.

In addition, the size of the air intake hole on the side of the hood is smaller on the grass clippings discharge side, which prevents dust from entering the grass discharge side and prevents clogging of the radiator. Ru. Therefore, the cooling effect can be maintained satisfactorily over a long period of time.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a plan view of the inside of the bonnet, FIG. 4 is a front view of the same, and FIG. 5 is a rear view of the same. 1...Front mower, 2...Vehicle, 3...Motor, 8...Driver's seat, 9...Bonnet, 10...
Engine, 19...Radiator, 20...Fan,
25...Side plate, 26...Air intake port, 27...Punching metal.

Claims (1)

[Claims] (1) In a front mower that is equipped with a mower in front of the cockpit and a bonnet that covers the engine on the rear side, a rear-discharge type radiator fan is installed in the bonnet, and A front mower characterized in that, among the air intakes provided, the grass clippings discharge side of the mower is formed to have a narrower air intake than the non-discharge side.