JPH0646637A - Rear discharge mower - Google Patents

Abstract

PURPOSE:To provide a mower enabling lawn remained uncut to be decreased to the utmost without declining in cut lawn chopping mechanism. CONSTITUTION:Bar blades 17 are set up inside a cutting edge housing 16 so as to be free to be revolvably driven, and a vertical wall member 18 enclosing the half-round portion of the front of the machine body along the proximity of the outer end locus of these bar blades 17 is extended from the ceiling surface of the cutting edge housing 16 to discharge cut lawn behind the machine body. In the subject rear discharge mower of the above-mentioned design, the vertical wall member 18 is plurally provided with threading slits S for planted lawn at intervals of small pitch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a bar blade rotatably driven on the inner side of a cutting blade housing, and at least a semicircular portion on the front side of the machine body along a vicinity of an outer end locus of the bar blade. The present invention relates to a rear discharge mower configured to extend a surrounding vertical wall member from a ceiling surface of a cutting blade housing to discharge grass clippings rearward of a machine body.

[0002]

2. Description of the Related Art Conventionally, in the above rear discharge mower, the vertical wall member is formed in the shape of a strip plate, and the lower end edge of the vertical wall member is set at a low position which is substantially the same level as the lower end edge of the cutting blade housing. .

[0003]

In the above-mentioned conventional structure, the vertical wall member is arranged along the vicinity of the outer end locus of the bar blade, and the cut grass is surrounded by the vertical wall member. It is designed to be finely chopped by a bar blade that rotates at high speed while floating inward, and efficiently disperse to the rear side of the fuselage to drop and release. However, in the above-mentioned conventional structure, since the vertical wall member is provided along the vicinity of the outer end locus of the bar blade, the planting turf is tilted forward by this vertical wall member and pushed down in an oblique posture as the aircraft travels. In this state, the bar blade is subjected to a cutting action, which has a drawback that there is a great possibility that uncut material may be left. Therefore, in order to eliminate the above-mentioned drawbacks, it is conceivable that the vertical width of the vertical wall member is narrowed and the lower end edge is set to a high level to reduce the pushing down of the planting turf. There is an adverse effect that the particles are scattered outward from the gap formed on the lower side of the vertical wall member and the above-mentioned shredding function cannot be sufficiently exerted. An object of the present invention is to eliminate the above-mentioned inconveniences by rational structural improvement.

[0004]

A characteristic structure of the present invention is that in the rear discharge mower described at the beginning, a plurality of slits for passage of planting grass are formed at small pitch intervals on the vertical wall member. .

[0005]

Since the slits are formed in the vertical wall member arranged along the vicinity of the outer end locus of the bar blade at a small pitch interval, the planting turf passes through this slit and passes in the standing posture. While preventing as much as possible from being pushed forward in an oblique posture, compared to the case where the vertical wall member is formed to be short over the entire area, it is possible to prevent the generated wind from leaking outward by the bar blade as much as possible. It is possible to sufficiently maintain the shredding function of the grass clippings carried around in the space formed by the members.

[0006]

Therefore, it has become possible to provide a rear discharge mower capable of minimizing the amount of uncut matter on the planting grass without significantly degrading the cutting function of the cut grass.

[0007]

Embodiments will be described below with reference to the drawings. Figure 5
Shows a riding lawn mower. This lawn mower is equipped with a support mechanism for mounting a mower 1 on the lower abdomen of an agricultural tractor via a parallel link mechanism so as to be able to move up and down, and for mounting a front loader (not shown) in front of the body. As shown in FIGS. 3 and 4, the front loader support mechanism 2 is extended to the left and right sides of the machine body in the front-rear direction, and is sub-frame 2a bolted between the machine body front frame 3 and the rear mission case 4. A support member 2b formed by bending a plate body in a U-shape from the middle part of the front and rear to the lateral outside.
Is extended in a cantilever shape, and a boss member 2c for inserting and connecting the vertical frame of the front loader is provided on the outer side of the support member 2b. The mower 1
Is connected to the airframe by a front link 5 and a rear link 6 in a parallel four-link form, and is configured to move up and down as the lift arm 7 provided on the upper portion of the mission case 4 moves up and down. In other words, a rotating member 9 that rotates in abutment interlocking manner around the same axis and a middle portion of the rear link 6 are interlockingly connected via a link mechanism 10 in the vicinity of the lower link 8 that is vertically moved by the lift arm 7. It is configured to drive up and down. The rear link 6 is pivotally connected to a fulcrum bracket 13 bolted to the lateral side of a clutch housing 12 that is directly connected to the engine 11 of the machine body, and the rear link 6 is formed on the base end side of the support member 2b. Insertion hole 1
It is configured to be connected to the rear bracket 15 of the mower 1 via 4 so that the fulcrum position can be raised and the ground clearance of the mower when rising can be set high.

The mower 1 is of a rear discharge type in which the grass is finely shredded and discharged to the rear side as it is. As shown in FIG. 1, three bar blades 17 are arranged in parallel in the cutting blade housing 16 so that they can be driven and rotated about their respective vertical axes. The vertical wall member 18 that surrounds the front semicircular portion is arranged in a state of extending from the ceiling surface of the cutting blade housing 16, and the grass clippings guide plate 19 is formed from the rear end of the vertical wall member 18 toward the rear side. Then, the lawn is discharged to the rear side of the machine body. That is, the lawn grass cut by the bar blade 17 is subjected to a cutting action by the bar blade 17 which rotates at a high speed while floating by the wind generated by the bar blade 17 in the space formed by the vertical wall member 18 a plurality of times. The grass is finely shredded, and the shredded grass is guided by the guide plate 19 as the machine advances and is dropped and discharged rearward. Cutting blade housing 16
A single ground contact free wheel 20 is supported at the center of the front side of the vehicle, and a plurality of ground contact free wheels 21 are supported at the rear side, so that the mower 1 moves up and down while following the ground contact with its own weight. It is configured as follows. The grass clippings guide plate 19 prevents the grass clippings from being caught by the ground freewheel 21 located near the center of the left and right sides.
It is arranged separately on the left and right sides of the ground free wheel 21. A rake member 23 for scraping and leveling the grass so that the grass is discharged in a uniformly dispersed state is provided at the grass grass discharge port 22 on the rear side of the cutting blade housing 16.
As shown in FIG. 2, a plurality of slits S for passage of the turf grass are formed in the vertical wall member 18 at a small pitch interval so that the turf may be subjected to the cutting action by the bar blade 17 in the upright posture as much as possible. As a result, while the shredding action of the lawn blade by the bar blade 17 is sufficiently exhibited, the uncut residue caused by the pushing down of the planting lawn by the vertical wall member 18 is minimized.

As described above, in place of the structure in which the rear side of the body of the bar blade 17 is opened, on the rear side of the body of the bar blade 17, the entire area in the circumferential direction of the outer end locus of the bar blade 17 connected to the vertical wall member 18 is formed. A narrow strip-shaped circumferential circular vertical wall member may be formed to extend the cutting lawn shredder function.

It should be noted that reference numerals are added to the claims to facilitate the comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

Figure 1: Bottom view of mower

FIG. 2 is a cutaway side view of the mower.

FIG. 3 is a cutaway front view of a rear link connecting portion.

FIG. 4 is a perspective view of a rear link connecting portion.

[Figure 5] Overall side view of the lawn mower

[Explanation of symbols]

 16 Cutting blade housing 17 Bar blade 18 Vertical wall member S Slit

Claims (1)

[Claims] 1. A bar blade (17) is rotatably driven inside a cutting blade housing (16), and at least a front half of the machine body is provided along a vicinity of an outer end locus of the bar blade (17). A rear discharge mower in which a vertical wall member (18) surrounding a circular portion is extended from the ceiling surface of the cutting blade housing (16) to discharge the grass clippings rearward of the machine body. (18) A rear discharge mower having a plurality of slits (S) for passage of planting grass at small pitch intervals.