JP3975561B2 - Marchingmore - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mulching mower for finely cutting grass and the like.
[0002]
[Prior art]
Conventionally, a mulching mower generally has a cutting blade covered with a cylindrical guide. Further, there is known a method in which a plurality of protrusions are provided in a guide of a mulching mower and when the cutting blade rotates, the turf is applied to the protrusions to cut the turf finely.
[0003]
[Problems to be solved by the invention]
By the way, in such a conventional device, the finely cut turf is not discharged smoothly, and the cut turf is hardened in a dumpling form in the mower deck or falls down in a streak and makes the cut mark look bad was there.
[0004]
[Technical means for solving the problems]
This invention is proposed in view of the above-mentioned problems, so that the grass cut short in the guide does not solidify in one place in the mower deck and falls into a dumpling shape, so that the appearance of the cut is not deteriorated. It is intended to provide a mulching mower.
[0005]
For this reason, this invention took the following technical means. That is, in a mulching mower covering the outer periphery of the three cutting blade which rotates in the mower deck (13) (16) in each arcuate guide member (17), the center of the guide body (17a) is left and right guide members ( 17b) protrudes forward, and adjacent walls are provided with a vertical wall (20) serving as a partition wall. The vertical wall (20) is formed lower than the ceiling height of the mower deck (13) to form the mower deck (13). By forming a space portion (21) between the ceiling and the vertical wall, adjacent guide bodies (17a , 17b) are connected to each other so that the cut grass can pass therethrough, and adjacent to the guide body (17). The triangular plate (23) is fixed by cutting off the part to be inclined, and the vertical lengths of the rear side of the central guide body (17a) and the lower portions of the left and right guide bodies (17a , 17b) are shortened. at the bottom of the guide body (17) To the formation of the notches in the circumferential direction section (s) and mulching mower structure characterized by.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. First, in terms of configuration, reference numeral 1 denotes a tractor as an example of a powered vehicle, which includes front wheels 2, 2 and rear wheels 3, 3. The rotational power of an engine 5 mounted on the front of the fuselage is transmitted in a mission case 6. It is configured to decelerate appropriately via a transmission (not shown) and to transmit this to the front wheels 2, 2 and the rear wheels 3, 3.
[0007]
The mission case 6 is provided with a hydraulic continuously variable transmission, and the machine body advances or reverses when a forward / reverse pedal (not shown) provided on the right side of the floor 7 is depressed. A rear PTO shaft 9 protrudes from the rear of the mission case 6 and a mid PTO shaft 10 protrudes forward from the lower center.
[0008]
A mower deck 13 is attached to the lower part of the machine body via a link mechanism 12 so as to be movable up and down. The mower deck 13 moves up and down to adjust the cutting height by operating a hydraulic operation lever (not shown) on the right side of the seat in the front-rear direction. As shown in FIG. 2, three cutting blades 16 are rotatably supported in the mower deck 13 in the horizontal direction at predetermined intervals. The cutting blades 16 receive rotational power from the mid PTO shaft 10 and receive the rotational power. Is trying to rotate.
[0009]
These cutting blades 16 are covered with a cylindrical guide body 17. The cutting blade 16 is formed by crossing a long lower blade 16a and a short upper blade 16b in a cross shape, and a blade portion (A) is provided at the front edge of the lower blade 16a and its outer portion. Is provided with a vertical wind-up portion 16c, and on the other hand, a blade portion (b) is also provided on the front edge of the upper blade 16b, and a knock-off portion 16d for knocking off the cut grass is provided on the outside thereof. Provided.
[0010]
3 and 4 are perspective views of the guide body 17. As shown in FIGS. 3 and 4, the central guide body 17a projects forward from the left and right guide bodies 17b, and a vertical wall 20 serving as a partition wall is provided at an adjacent portion. The vertical wall 20 is lower than the height of the ceiling of the mower deck 13, and a slight space 21 exists between the ceiling of the mower deck 13 and the vertical wall 20. Mowed grass in the guide body 17 at an adjacent site passes through this space portion 21.
[0011]
In this embodiment, the adjacent portions of the guide body 17 are cut obliquely, and the triangular plate 23 is fixed by welding or the like. Thus, by fixing the plate 23 to the adjacent portion, the moving mowing grass is prevented from being caught by the corners of the guide bodies 17a and 17b. Further, the length of the guide body 17 in the vertical direction is not constant. As shown in FIG. 4, the length in the vertical direction of the rear side of the center guide body 17a and the lower part of the left and right guide bodies 17b is slightly shortened. Yes. Therefore, when the amount of turf or grass cut in each guide body 17 increases, fine cut grass or the like is discharged rearward through the gap s.
[0012]
It should be noted that not only the rear central portion and its both side portions but also the front central portion and its both side portions have a slight gap, so that the grass travels well in the guide body 17 during mulching work, and the cut grass is dumped. The cuts will be beautiful without solidifying and falling. In order to reduce grass spillage during the mulching operation, the apparatus of this embodiment is devised as follows.
[0013]
That is, as shown in FIG. 6, the mower deck 13 that wraps the guide body 17 is provided with a space of 90 mm or more (symbol A in the drawing) from the lower end portion of the cutting blade 16, and from the lower end portion of the mower deck 13 to the lower end of the cutting blade 16. The distance is about 10 mm (symbol B in the figure). The overlap margin of the cutting blade 16 when viewed from the plane also affects the curling of the grass, and is set to about 30 mm in the apparatus described here. Further, the peripheral speed of the cutting blade 16 is set to 76 m / sec.
[0014]
In the above example, when turf or grass cutting work is performed, first the gage wheel 25 is adjusted up and down to set the cutting height, the engine 5 is rotated, and the mid PTO shaft 10 is driven to rotate. Then, the three cutting blades 16 start to rotate and mow the grass and grass. The grass and grass cut by the long lower blade 16a are once lifted and then further cut by the upper blade 16b that rotates integrally with the lower blade 16a and this time downward. Is released to the lower part of the guide body 17.
[0015]
The grass and grass cut finely in the individual guide bodies 17 are sequentially discharged backward from the notches s below the guide bodies 17, or a part of the grass and grass is passed through the space 21 above the vertical wall 20. Then, it enters the adjacent guide body 17. As described above, in this embodiment, the lower rear portion of the guide body 17 is cut out along the circumferential direction so that the grass and grass cut from the cutout portion s are discharged. As a result, a large amount of grass and grass are not clogged, and the mulching operation can be performed without interruption.
[0016]
【The invention's effect】
The present invention as described above, in the mulching mower covering the outer periphery of the three cutting blade which rotates in the mower deck (13) (16) in each arcuate guide member (17),
The center guide body (17a) protrudes forward from the left and right guide bodies (17b),
The adjacent part is provided with a vertical wall (20) as a partition wall, and the vertical wall (20) is formed lower than the height of the ceiling of the mower deck (13) so as to be between the ceiling and the vertical wall of the mower deck (13). By forming a space (21) in the adjacent guide bodies (17a , 17b) so as to allow the cut grass to pass therethrough , the adjacent parts of the guide body (17) are diagonally cut out to form a triangle. Since the plate-like plate (23) is fixed, the moving mowing grass does not catch on the corners of the guide bodies (17a, 17b).
Further, by shortening the vertical length of the rear side of the central guide body (17a) and the lower portions of the left and right guide bodies (17a , 17b) , a notch is formed along the circumferential direction at the lower portion of the guide body (17). Since (s) is formed, when the amount of turfgrass cut in the individual guide bodies (17) increases, fine grass and the like are discharged backward through the notches (s). Therefore, the mulching work can be performed very well without the cut grass and grass clogging in the mower deck and interrupting the work or making the cut traces streak.
[Brief description of the drawings]
FIG. 1 is an overall side view.
FIG. 2 is a plan view of a main part.
FIG. 3 is a perspective view of the entire guide body.
FIG. 4 is a perspective view of a guide body.
FIG. 5 is a perspective view of a blade.
FIG. 6 is a side sectional view of a main part.
[Explanation of symbols]
1 tractor 2 front wheel 3 rear wheel 5 engine 6 mission case 9 rear PTO shaft 10 mid PTO shaft 13 mower deck 16 cutting blade 17 guide body 21 space 37 rear cover

Claims (1)

Mower deck in mulching mower covering the outer periphery of each arcuate guide of the three rotating in (13) cutting blade (16) (17), the center of the guide body (17a) is left and right guide member (17b) A vertical wall (20) that protrudes further forward and serves as a partition wall is provided at an adjacent portion, and the vertical wall (20) is formed lower than the ceiling height of the mower deck (13) to form a ceiling of the mower deck (13). The adjacent guide bodies (17a , 17b) are connected to each other by forming a space portion (21) between the guide body (17 ) and the vertical wall so that the mowing grass can pass through, and adjacent portions of the guide body (17) are provided. The triangular guide plate (23) is fixed by cutting diagonally, and the guide body is shortened by shortening the vertical length of the rear side of the central guide body (17a) and the lower part of the left and right guide bodies (17a , 17b). circumference side at the bottom of the (17) Mulching mower, characterized in that to form the notch portion (s) is along.

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