JPH0796754A - Mower - Google Patents

Abstract

(57) [Summary] [Purpose] The dust that flows in from the outside air intake is dropped and collected in the case to prevent the dust from clogging early. [Structure] The engine 4 inside the hood 3 on the front side of the fuselage
The engine 4 is configured to suck air from the upper side, and is connected to the rear side of the bonnet 3 to cover the side facing the driving section step 10 to the driving section case 11, and from the driving section step 10 side. In a mower having an outside air intake 13 for taking in outside air, the outside air intake 13 is formed wide enough to allow the entry of cutting grass and the like, and the outside air taken in through this outside air intake 13 is constant. Rectifying unit 1 that adjusts the wind direction so that rectification follows the direction of
5 is provided, and a plate body 20 that resists the flow of wind is provided on the lower side of the flow regulating portion 15 in the flow direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mounts an engine inside a bonnet on the front side of an airframe, and the engine is constructed to suck air from the upper side, and is connected to the rear side of the bonnet so that the operation section The present invention relates to a mower in which an outside air intake for taking in outside air from the operation step side is formed in an operation case that covers the side facing the mower.

[0002]

2. Description of the Related Art Conventionally, in the above-mentioned mower, the outside air intake port is constructed by using, for example, a mesh body, and dust is prevented from entering the outside air intake port in the mesh form.

[0003]

However, in this type of mowing machine, a lot of dust is generated during mowing work, so in the above conventional structure, there is a possibility that the mesh body may be clogged early. There was room for improvement. Therefore, as a method of eliminating such a defect, the hole of the outside air intake is changed to a larger size so that clogging at that portion is less likely to occur, and dust is invaded in front of the intake portion of the engine by a dust preventer. However, since the wind sucked through the outside air intake port is directly sucked into the engine intake portion, large dust that has entered through the outside air intake port is fast. The dust may reach the engine intake portion as it is due to the flowing air, and the dust protector may be clogged early. The present invention aims to eliminate the above-mentioned problems.

[0004]

According to a characteristic configuration of the present invention, in the grass mower described at the beginning, the outside air intake is formed wide enough to allow the entry of grass or the like, and the outside air intake is provided through the outside air intake. A rectifying section is provided to adjust the wind direction so that the outside air sucked in is rectified along a certain direction, and a flow resistance imparting means, which is a resistance to the flow of wind, is provided on the lower side in the flow direction of the rectifying section. There is a point.

[0005]

[Function] By forming the outside air intake to a wide width, the grass is prevented from being clogged in the outside air intake early in a short period of time, and dust such as cuttings enters through the outside air intake. Even though the flow direction of the air taken in through the outside air intake is regulated in a certain direction, and there is a flow resistance imparting means on the lower side in the flow direction, which is a resistance against the flow of the wind. Therefore, the wind flowing in the rectified state receives resistance, and the flow velocity decreases at this location. As a result, relatively heavy and large dust such as grass is stalled at this location and falls downward due to its own weight, and there is little risk of reaching the intake portion above the engine.

[0006]

As described above, the large dust is positively introduced into the case to regulate the flow of the inflowing air so that the air flows in a fixed downward direction so that the flow resistance is always imparted to the large dust. By allowing the air to be collected downward, it is possible to prevent the clogging of the outside air intake port early and prevent the early clogging of the engine intake portion by cutting grass or the like.

[0007]

Embodiments will be described below with reference to the drawings. Figure 1
Fig. 1 shows a riding lawn mower which is an example of a mower. This lawn mower connects a mower 2 to a lower abdomen between front and rear wheels 7 and 8 of a riding type traveling body via a link mechanism 1 so as to be able to move up and down, and mounts an engine 4 inside a hood 3 at a front portion of the body. The transmission system is configured so that the power of the engine 4 is supplied to the mower 2 via the belt transmission mechanism 5 and the power is supplied to the rear wheels 8 via the transmission case 6. The bonnet 3 is divided into upper and lower halves, the lower bonnet 3a is fixedly mounted on the machine body frame 9, and the upper bonnet 3b is swingably openable and closable about the front horizontal axis.

The engine 4 is of an air-cooled type, and its output shaft is arranged in a posture along the longitudinal direction, and the engine cooling air is sucked from the upper portion of the engine 4.
The outside air intake for cooling the engine is connected to the rear side of the bonnet 3 on the front side of the machine body, and covers the side of the steering operation mechanism that faces the driving section step 10.
It is formed on. More specifically, as shown in FIG. 2, a portion provided in a circular arc shape in plan view facing the driving section step 10 of the driving section case 11 in which the lower end portion is internally provided with the steering operation shaft 12 linked to the gear type steering operation mechanism. 11
Outside air intakes 13 and 14 are formed in each of the a and the left and right lateral portions 11b so as to be in an oblique posture toward the lower front side. Outside air intake 1 provided in arcuate portion 11a
As shown in FIGS. 4 and 5, the reference numeral 3 is formed to be long over almost the entire widthwise direction of the portion 11a, and is formed wide so that relatively large dust such as grass clippings can pass therethrough. And
On the inside of the case of the outside air intake 13, a straightening plate 15 [for straightening the flow direction of the wind to a diagonally lower side in an oblique posture toward the front lower side along both upper and lower edges of the mouth] [Example]] are connected in series. Therefore, the sucked engine cooling air flows toward the front lower side oblique direction through the outside air intake 13, and then is sucked toward the engine upper side. As a result, when relatively large dust such as grass clippings flows obliquely downward and to the front, it is less likely that it will fall downward due to its own weight and reach the dust shield 16 in the engine intake. There is. Reinforcing ribs 17 are provided between the plates 15 at appropriate places. Further, as shown in FIGS. 6 and 7, the outside air intake ports 14 formed on the left and right lateral side portions 11b are located diagonally toward the lateral side outward as the lateral side portions 11b of the operating unit case 11 are located downward. In contrast to being formed in a posture, a plurality of slits S directed to the lower front side in the same direction as the outside air intake 13 provided in the arcuate portion 11a are formed so as to be vertically overlapped with each other, and the inside of the slit S is deep inside. The surface 18 is formed in a direction away from the front side substantially inward of the body, that is, in a posture along the front-rear direction of the body, and the slits are partitioned by the plate body 19. It is configured to exert a rectifying action so as to flow.

Further, on the lower side in the flow direction of each of the outside air inlets 13 and 14, there is provided a plate body 20 or 2 which becomes a flow resistance against the flowing air flowing in a straightened state via the outside air inlets 13 and 14.
1 [an example of flow resistance applying means] is arranged in a vertical posture. By imparting the flow resistance in this manner, large dust such as grass clippings taken in with the outside air through the outside air intake ports 13 and 14 stalls and easily falls by its own weight. Further, at the lower end of the operating unit case 11, a tray 23 for preventing dust from entering from the outside from the lower side and receiving and supporting the dropped dust is detachably arranged.

On the upper part of the operation part case 11, there is provided a steering support part 22 for rotatably supporting the steering operation shaft 12, an operation panel part provided with lamps and various operation tools for displaying various operation states. As shown in FIGS. 3 and 4, each of the driving section case 11, the steering support section 22 and the operation panel section 24 is integrally formed of a synthetic resin material.

The steering handle 25 is constructed so that it can be moved back and forth according to the work situation. That is, as shown in FIGS. 8 and 9, the steering operation shaft 12
A universal joint 26 is interposed at the lower end of the steering wheel so that it can swing back and forth, and
A long hole 27 is formed to allow the rocking in the front-rear direction. A resin bush 28 with a collar rotatably supports the steering operation shaft 12, and the tubular member 29 into which the resin bush 28 is press-fitted is engaged with a guide groove 31 formed in the left and right fixed frames 30, 30. A sliding guide portion 32 to be guided together is integrally provided, and each fixing frame 3 is fixed by a tightening lever 34 via a collar 33.
A connecting portion 36, which is connected to 0 and 30 together by bolts 35, is integrally formed. The bolt insertion hole 37 formed in the tubular member 29 is formed as an arcuate elongated hole around the longitudinal swing axis, and the tightening lever 34 is loosened to adjust the longitudinal movement of the steering handle 25 within the elongated hole range. The lever position is adjusted by tightening and fixing the lever 34 again. Further, the collar 3 of the resin bush 28
8 is formed in a long length so that the long hole 27 formed in the steering support portion 22 can be covered so as not to be exposed to the outside in the entire range of forward and backward swing adjustment of the steering operation shaft 12.

It should be noted that although reference numerals are given in the claims for facilitating the comparison with the drawings, the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

[Figure 1] Overall side view of the lawn mower

[Fig. 2] Side view of the driving unit case

FIG. 3 is a side view of a resin integrated case

FIG. 4 is a rear view of the resin integrated case

FIG. 5 is a cross-sectional plan view of the outside air intake.

FIG. 6 is a cross-sectional plan view of the outside air intake.

FIG. 7 is a vertical sectional front view of an outside air intake.

FIG. 8 is a side view of the handle movement adjusting unit.

FIG. 9 is a front view of a handle movement adjustment unit.

FIG. 10 is a perspective view of a steering operation pivot support portion.

[Explanation of symbols]

 3 Engine Bonnet 4 Engine 10 Operating Step Step 11 Operating Case 13 External Air Inlet 15 Rectifying Section 20 Flow Resistance Applying Means

Claims (1)

[Claims] 1. An engine (4) is mounted inside a bonnet (3) on the front side of the fuselage, the engine (4) is configured to suck air from the upper side, and the rear side of the bonnet (3). Steps to drive section (10)
The outside air intake (13) for taking in the outside air from the operation step (10) side into the operation case (11) covering the side facing the air
In the lawn mower, the outside air intake (13) is formed wide enough to allow the entry of grass and the like, and the outside air sucked through the outside air intake (13) is constant. A rectifying section (15) is provided to adjust the wind direction so that the rectification is performed along the direction of.
A mower having a flow resistance imparting means (20) that is a resistance against the flow of wind on the lower side in the flow direction of.