JPH0614634A - Mower - Google Patents

Abstract

PURPOSE:To obtain a mower properly usable for mulching operation and other operating states and capable of improving the lawn cutting performance. CONSTITUTION:The objective mower is equipped with three bar blades 2 on the inside of a cutting blade housing 1. In this mower, a peripheral wall member 7 forming a treating chamber (M) for mulching surrounding the whole periphery near loci of the outer end of the respective bar blades 2 is detachably installed on the inner surface of the cutting blade housing 1. Thereby, the lower end of the peripheral wall member 7 is set at nearly the same height as that of the lower end of the cutting blade housing 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mower having a plurality of bar blades arranged side by side inside a cutting blade housing.

[0002]

2. Description of the Related Art Conventionally, in the above mower, as shown in FIG. 8, for example, as shown in FIG.
A substantially bowl-shaped peripheral wall member 31 for forming a mulching processing chamber that surrounds the outer end locus of the bar blade 2 is attached to the ceiling of the inner surface of the bar blade 2, and the cut grass cut by the bar blade 2 is retained in this mulching processing chamber. It is configured to perform so-called mulching work, in which it is finely chopped and discharged and dropped on the turf surface,
In order to avoid interference with the bar blade 2, the rear side of the peripheral wall member 31 provided at a short height is provided on the vacuum plate 6 conventionally provided (for efficiently guiding the wind generated by the bar blade as the cut grass transport wind). Vertical wall] prevents the generated wind from leaking outward, and the front side of the peripheral wall member 31 closes the inner space of the housing with a plate 32 extending from the lower end to the front wall of the cutting blade housing 1. There was one.

[0003]

The above-mentioned conventional structure is convenient for use as a combined structure capable of being selectively used for a work form in which the lawn is directly discharged to one lateral side and a mulching work form for finely shredding. However, as described above, since the front side of the peripheral wall member forming the mulching processing chamber is formed to be short, a part of the grass is shredded in the processing chamber. There is a risk that the cut grass may slip out to the outside through this lower clearance portion, and the cut grass may stick into the planting grass in a long state before being shredded, failing to exert a sufficient shredding action. Further, the planting grass before being subjected to the cutting action by the bar blade is likely to be in an oblique posture pushed down by the plate body, and the cutting performance tends to be lowered, which leaves room for improvement. The present invention aims to eliminate the above-mentioned problems.

[0004]

According to a characteristic construction of the present invention, in the mower described at the beginning, a treatment for mulching which surrounds the inner surface of the cutting blade housing around the outer end locus of each bar blade over the entire circumference. The peripheral wall member that forms the chamber is detachably attached, and the lower end of the peripheral wall member is set to substantially the same height as the lower end height of the cutting blade housing.

[0005]

In the mulching work, by mounting the peripheral wall member, the cutting grass cut by the bar blade stays in the mulching processing chamber by the wind generated upward by the bar blade and stays in the bar blade. Due to the cutting action of a plurality of times, it is finely shredded. Here, since the lower end of the peripheral wall member that constitutes the mulching processing chamber is set to a low level which is approximately the same height as the lower end height of the cutting blade housing, the risk of grass clippings coming out can be minimized and shredded. It will be able to fully demonstrate its function. Moreover, since a space can be secured between the peripheral wall member and the vertical wall of the cutting blade housing, the pushing down action of the planting turf is only temporary due to the thin wall material, and it is easy to return to the standing posture after that. Therefore, the cutting performance is less likely to deteriorate.

[0006]

Therefore, with a rational construction, it is possible to selectively use mulching work and other work forms, such as side discharge work, while improving the shredding performance in mulching work. At the same time, it became possible to improve the lawn cutting performance, and it became possible to provide mowers with high practical convenience.

[0007]

Embodiments will be described below with reference to the drawings. The mower is shown in FIGS. This mower is configured in a side discharge configuration, in which three bar blades 2 are arranged in parallel in the cutting blade housing 1 so as to be rotatable and rotatable about their respective longitudinal axes, and at the same time, one side of the cutting blade housing 1 is cut grass. The discharge port 3 is formed, power is supplied from a traveling machine body (not shown), each bar blade 2 is rotationally driven in the same direction at high speed, and the cut grass cut by each bar blade 2 is generated by the bar blade 2 itself. It is configured such that it is conveyed and guided along the upper passage S of the front vertical wall portion 1a of the cutting blade housing 1 by the conveying wind, and is discharged outward from the discharge port 3. Gauge wheels 4 for changing and adjusting the cutting height are provided on the left and right sides on the rear side of the cutting blade housing 1,
A ground idler wheel 5 for overcoming the protrusion is supported on the front side. The outer end loci of the adjacent bar blades 2 are configured so as to partially overlap with each other when viewed in the front-rear direction so that uncut residue does not occur. The bar blades 2 are arranged so as to be welded and fixed to the inner surface ceiling portion 1b of the cutting blade housing 1 in a state of being close to the outer end locus along the rear outer periphery of each bar blade 2. It is configured to prevent the generated wind from leaking to the outside and efficiently contribute to the transportation of the grass clippings. Further, this mower is provided on the inner surface of the cutting blade housing 1 in order to perform a mulching operation in which the grass clippings cut by the bar blades 2 are finely chopped and dropped and discharged downward. A peripheral wall member 7 that forms a mulching processing chamber M that surrounds the vicinity of the end locus over the entire circumference is detachably attached, that is, as shown in FIG. 3, it penetrates the ceiling portion 1b of the cutting blade housing 1. Blade drive shaft 8 provided in the state
A pivot boss member 9 for rotatably supporting is fitted with an insertion hole 7a of a peripheral wall member 7 press-molded into a substantially bowl shape, and four peripheral wall members 7 are welded and fixed to each other. Through the connecting member 10, the ceiling blade 1b of the cutting blade housing 1 is bolted and fixedly connected to the pivot boss member 9 together with bolts. The peripheral wall member 7 is formed such that its lower end is located above the bar blade 2 so that the peripheral vertical wall portion 7b does not interfere with the bar blade 2. The rear side of the peripheral wall member 7 extends along the outer side surface. The vacuum plate 6 formed to be tall to the same level as the lower edge of the cutting blade housing 1 is positioned. Further, on the front side of each peripheral wall member 7, an auxiliary plate 11 is attached along the outer side surface, the lower end of which is set to substantially the same height as the lower end height of the cutting blade housing 1 on the front side. In this way, while avoiding interference with the bar blade 2, the mulching processing chamber M with little leakage of generated wind is formed along almost the entire circumference of the rotation outer end locus to form a fine cut grass. The disconnection function is enhanced. The peripheral wall member 7 located on the opposite side of the grass clippings discharge port 3 is provided with a folded-back portion 12 for preventing the grass clippings from spilling laterally outward from the mower. As described above, the notch 13 is formed in the lower portion of the adjacent peripheral wall member 7 at a portion where the outer end loci of the adjacent bar blades 2 partially overlap each other when viewed in the front-back direction.
Without lowering the mulching performance, the outer edge of the bar blade 2 may be prevented from interfering with the peripheral wall member 7 due to an assembly error or the like.

[Embodiment 1] The peripheral wall member 7 is for forming a cut grass discharge path S in a side discharge as shown in FIG. 4, instead of the structure integrally formed in a bowl shape as described above. A member for forming a mulching processing chamber, which includes a horizontal plate-shaped portion 14a that closes a step formed in the cutting blade housing 1 and an arcuate vertical wall portion 14b that covers the vicinity of the outer end locus on the front side of each bar blade 2. 14 is attached to the inner surface ceiling portion 1b of the cutting blade housing 1, and the mulching processing chamber forming member 14 and the cutting blade housing ceiling surface 1 are conventionally used.
The peripheral wall member 7 may be configured by the vacuum plate 6 attached to b.

[Second Embodiment] The cutting blade housing is not limited to the one for side discharge as described above, but may be any of those shown in FIGS.
As shown in FIG. 7, it may be for a rear discharge [of the type that discharges grass clippings rearward]. At this time, the rear side portion 7c of the peripheral wall member 7 is entirely opened by swinging, or the lower side portion 7c1 of the upper and lower two-layer structure is configured to be slidable up and down. Slides the lower part upward so that the grass can be discharged smoothly.

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 sectional view of mower.

FIG. 3 is a perspective view of a peripheral wall member.

FIG. 4 is a bottom view of the mower according to the first embodiment.

FIG. 5 is a bottom view of the mower according to the second embodiment.

FIG. 6 is a sectional view of a mower according to a second embodiment.

FIG. 7 is a bottom view of a mower having another configuration according to another embodiment 2.

FIG. 8 is a sectional view of a mower showing a conventional structure.

[Explanation of symbols]

 1 Cutting blade housing 2 Bar blade 7 Surrounding wall member 13 Notch M Mulching processing chamber

Continued front page (72) Minoru Kyotani 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd. (72) Inventor Kurei, 64 Ishizukitamachi, Sakai City Osaka Prefecture

Claims (2)

[Claims] 1. A mower having a plurality of bar blades (2) arranged side by side inside a cutting blade housing (1), wherein each bar blade (2) is provided on an inner surface of the cutting blade housing (1). A peripheral wall member (7) forming a processing chamber (M) for mulching which surrounds the vicinity of the outer end locus of the whole circumference is detachably attached, and the lower end of the peripheral wall member (7) is attached to the cutting blade housing (1). The mower is set to be approximately the same height as the bottom edge of the. 2. The adjacent mulching processing chambers (M),
The mower according to claim 1, wherein (M) is partially overlapped as viewed in the front-rear direction, and a cutout (13) is formed in a lower portion of the peripheral wall member (7) at the overlapping portion.