JP3859561B2 - Moore - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a plurality of rotating blades that are driven to rotate around the longitudinal axis are supported in parallel inside the mower deck, and a circular shredded chamber (enclosure) surrounding the rotation trajectory of each rotating blade is partitioned for each blade. The present invention relates to a mower provided with a shredding baffle to be formed.
[0002]
[Prior art]
The mower configured as described above is configured to perform a mulching operation in which the cut grass is cut into small pieces and left in the mower passage mark so that the cut grass is not required to be collected and used as compost. For example, as disclosed in Japanese Patent Application Laid-Open No. 6-14634, a shredding baffle for forming a shredding chamber for each blade is attached to the top plate of a mower deck configured in a side discharge system. .
[0003]
[Problems to be solved by the invention]
Since each of the chopping chambers formed for each blade is circular, a V-shaped space opened forward is formed at the front of the boundary between adjacent chopping chambers. For this reason, the grass that has passed through the front wall of the moor deck and introduced into the deck will be gathered in the back of the V-shaped space, and some of the gathered grass will be cut off at an angle. It may not be done or it may be cut off at an angle, resulting in a poor finish. In particular, when the aircraft is run at a high speed, the above-mentioned problem appears more remarkably because the grass gathered in an oblique manner is subjected to a cutting action immediately before standing up.
[0004]
The present invention has been made by paying attention to such a situation, and has as its main object to provide a mower capable of performing a good mulching work with a small amount of uncut residue and a finished finish.
[0005]
[Means for Solving the Problems]
[Configuration, Action, and Effect of Invention of Claim 1]
[0006]
According to the first aspect of the present invention, a plurality of rotating blades that are driven to rotate about the longitudinal axis are supported in parallel inside the mower deck, and a circular shredded chamber surrounding the rotation locus of each rotating blade is provided for each blade. In mowers with shredding baffles to form compartments,
A shredding baffle is provided with a guide member for preventing grass from entering a forward-facing V-shaped space formed at the front of the boundary between adjacent shredding chambers, and the guide member is closed at the bottom of the V-shaped space. while configured with a bottom plate portion, wherein the guide member, at a position behind the tangent connecting the rotational locus of the rotary blades adjacent to the guide member, the front edge along the tangent, linearly in a plan view It is comprised so that it may become .
[0007]
According to the above configuration, even if the grass introduced into the deck through the front wall of the mower deck reaches the front of the V-shaped space, the guide member blocks the opening of the V-shaped space. Without being inclined and gathered in the back of the space, it enters under the guide member and enters each shredding chamber, and receives the cutting action and shredding action by each rotating blade.
In addition, when the grass that reaches the front boundary of the adjacent shredded chambers is guided to the shredded chamber under the guide member, the bottom plate portion of the guide member prevents the grass from rising, and the raised grass is V-shaped. There will be no entry into space.
[0008]
Therefore, according to the invention which concerns on Claim 1, the grass which reached the boundary front part of the adjacent shredding chamber gathers diagonally, and it is less likely to receive a cutting action, and there are few cutting residues and uneven cutting. It became possible to perform mulching work with a good finish. In particular, mulching work at high speeds can be performed without reducing the finish, which is effective in improving work efficiency.
Further, it is possible to reliably prevent the grass from entering the V-shaped space and prevent the gathering.
[0009]
[Configuration, Action, and Effect of Invention of Claim 2]
[0010]
According to a second aspect of the present invention, in the first aspect of the invention, the guide member includes a front plate portion that closes the front opening of the V-shaped space.
[0011]
[0012]
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows the entire side surface of the riding lawn mower equipped with the mower M according to the present invention, and FIG. 2 shows the plane thereof. In this lawn mower, a mower M is a link mechanism 4 having a quadruple link structure in a lower abdomen between front and rear wheels in a traveling machine body 3 having a pair of left and right front wheels 1 and a pair of left and right driving rear wheels 2 configured as caster wheels. The mower M can be moved up and down substantially in parallel by moving the link mechanism 4 up and down by hydraulic pressure or manually. An engine 5 is mounted on the rear part of the traveling machine body 3 and a driver seat 6 is provided on the front part thereof.
[0014]
And rear transmission section is supported from the main frame 3a to the left and right pair of rear frames 3b which extends rearward obliquely downward in the traveling machine body 3, the schematic is shown in FIG. The output of the engine 5 is input to a counter case 7 and branched into a traveling system and a working system. The power of the working system is converted into a laterally rotating power, and a pair of left and right hydraulic continuously variable transmissions (HST) 8 The shift output is transmitted to the rear wheel 2 via the deceleration case 9. The deceleration case 9 is equipped with brakes 10 for braking the left and right rear wheels 2 separately. Further, the power of the work system is output forward from the PTO shaft 12 via the PTO clutch 11.
[0015]
The left and right continuously variable transmissions 8 are individually shifted by the traveling levers 13 arranged to swing back and forth on the left and right sides of the driver's seat 6 so that the left and right rear wheels 2 independently move forward and backward. It is configured to be shifted. Accordingly, by swinging the left and right traveling levers 13 forward by the same amount, both the left and right rear wheels 2 can be driven forward at the same speed to move straight forward, and both the left and right traveling levers 13 can be moved backward. The vehicle body 3 can be moved in a straight line by swinging the same amount to each other, and the speed of the left and right rear wheels 2 can be made different from each other by making the operation amounts of the left and right travel levers 13 different. It can be swung in any direction. In particular, by operating one of the left and right traveling levers 13 to the neutral stop position and operating the other traveling lever 13 in the forward or backward range, the belief turning around the stopped one rear wheel 2 is performed. The left and right traveling levers 13 are swung in opposite directions from the neutral position, and the driving directions of the left and right rear wheels 2 are made opposite to each other. As a center, you can make a super-spinning swivel.
[0016]
The mower M is a flat surface in which the three rotating blades 16, 17, and 18 that are driven to rotate about the longitudinal axis are slightly displaced forward in the interior of the mower deck 15 that is opened downward. The moor deck 15 has a triangular arrangement and is pivotally supported. The upper and lower depths of the mower deck 15 are deeper than the depth of the rear part of the mower deck with a tunnel, and the height of the top plate is generally the same. And a cut grass discharge port d is formed at the right end of the flat deck.
[0017]
The working power taken out from the PTO shaft 12 is passed through a pair of universal joints 21 and 22 and a telescopic transmission shaft 23 to a rearward input shaft 20 of a bevel gear case 19 disposed on the central upper surface of the mower deck 15. The transmitted power converted into the vertical axis rotation by the bevel gear case 15 is transmitted to the rotary shaft 17a of the central rotary blade 12, and the rotary shaft 17a and the rotary shafts 16a, 18a of the left and right rotary blades 16, 18 Are rotated by the belt 24 and all the rotating blades 16, 17, 18 are in the same direction so that the first half of the rotation locus of each rotating blade 16, 17, 18 is directed to the side where the cut grass discharge port d exists. It is driven to rotate at a constant speed (clockwise as viewed from above).
[0018]
In addition, a trapezoidal concave portion a is formed at the left and right central portion of the rear end side of the moor deck 15. The recess a has a depth that extends forward from the rear universal joint 22 and, as shown in FIG. 5, the mower M can be greatly raised until the rear universal joint 22 enters the recess a. It has become. Therefore, according to this configuration, the mower M can be raised sufficiently high even if the upper and lower depths of the mower deck 15 are increased and the PTO shaft 12 is installed at a low position.
[0019]
Freewheels (anti-scalar rollers) 25 and 26 for climbing over obstacles are provided near the front center and the front left and right ends of the mower deck 15, and obstacles are also climbed over two places on the left and right sides of the mower deck 10 near the rear center. An idler wheel 27 is provided, and when the mower M suspended and supported by the link mechanism 4 with an upward movement flexibility approaches a ground slope or a raised portion, the idler wheels 25, 26, 27 When one of them rides on a raised portion or the like, the mower M is relatively lifted, and the mower deck 15 is prevented from coming into direct contact and shaving the ground. Here, the center idler wheel 25 on the front side of the deck and the left and right idler wheels 27 on the rear side of the deck are configured to be fixed in orientation, whereas the left and right idler wheels 26 on the front side of the deck are caster wheels. Even if the idler wheel 26 is grounded when the traveling vehicle body 3 is suddenly turned due to a turn of the ground or a superstrate, the idler wheel 26 is smoothly turned to change the direction of the mower M. It is avoided in advance that lawn cutting is caused by the idler wheel 26 that is changed in direction following movement and moves greatly.
[0020]
The mower M can select and change the mowing work in three types by changing the internal specifications of the mower deck 15, and the configuration of each mode will be described below.
[0021]
[Chopped side discharge form]
FIG. 6 shows a cross-sectional plan view of the mower M configured in a side discharge configuration suitable for diffusing and discharging from the cut grass discharge port d after cutting the upper part of the managed turf grass and cutting it relatively finely. Yes. A rear baffle 29 that concentrically surrounds the rotational trajectories of the rotary blades 16, 17, and 18 from the rear is welded and fixed to the rear portion of the mower deck 15 in the mower M. A front baffle 30 surrounding the rotation trajectory of each rotary blade 16, 17, 18 from the front is detachably attached.
[0022]
The front baffle 30 is formed by bending a vertically oriented plate material into a corrugated shape, and includes a first front baffle 30a facing the front of the uppermost (leftmost) rotary blade 16 in the cutting grass conveying direction, and a center And the second front baffle 30b facing the front part of the lowermost (right end) rotating blades 17 and 18 in the cutting grass conveying direction and connected by a bolt 31 to form a first front baffle 30a. A mounting bolt 32 is fixedly welded to the front surface of the second front baffle 30b. On the other hand, a mounting hole 33 through which the bolt 32 is inserted is formed in the top plate 15a of the mower deck 15, and each bolt 32 of the front baffle 30 is inserted into the mounting hole 33 from the inside of the deck to each bolt 32. A nut 34 is tightened and attached to the protruding end of the screw. A mounting bracket 35 that is abutted against the left end portion of the first front baffle 30a is welded and fixed to the left side wall 15b of the mower deck 15, and a mounting bracket 36 is fixed to the front surface of the right end portion of the second front baffle 30b by welding. are, the left end portion as well as tightening connected by bolts 37 to the mounting bracket 35 of the first front baffle 30a, by tightening connecting by bolts 38 to the front wall 15b of the mower deck 15 the mounting bracket 36, the front baffle 30 is firmly connected and fixed inside the deck.
[0023]
Here, a corrugated head e protruding inward of the deck in the front baffle 30 formed in a corrugated shape, that is, a portion facing between adjacent rotating blades is a convex having a large curvature similar to the blade rotating radius. Part of the cut grass cut by the upper rotating blade is guided by the concave curved surface of the front baffle 30 and rotated and shredded, and part of the cut grass is smooth. It is guided by the corrugated head e convexly curved and diffused and supplied into the rotation region of the lower rotary blade, and undergoes shredding.
[0024]
[Mulching form]
FIG. 9 shows a cross-sectional plan view of the mower M configured in a mulching configuration in which the cut mowing grass is sufficiently finely cut and left on the mower passage mark. In this configuration, the rear baffle 29 and The shredding baffle 40 that partitions the circular shredding chambers g, h, and i surrounding the rotation trajectory of each of the rotating blades 16, 17, 18 together with each other is attached instead of the front baffle 30. It has been.
[0025]
As shown in FIG. 14, the shredding baffle 40 includes a left mulching baffle 40a, a right mulching baffle 40b, and a central mulching baffle 40c, and is fixed by using the mounting holes 33 on the top surface of the deck. Is done.
[0026]
The left mulching baffle 40a is attached to the mounting hole 33 of the deck top plate 15a using a bolt 41 standing and fixed on the front surface thereof, and its left end is connected to the mounting bracket 35 on the deck side with a bolt 42, Further, the joint fitting 43 welded and fixed to the right end is fastened and fixed to the rear baffle 29 with bolts 44.
[0027]
The right mulching baffle 40b is attached to the mounting hole 33 of the deck top plate 15a using a bolt 46 that is erected and fixed to the front surface of the right mulching baffle 45 via a support metal 45, and a joint 47 that is fixed to the left end by welding is provided at the rear. A joint 49 that is fastened and fixed to the baffle 29 with a bolt 48 and welded to the right end is fastened and fixed to the rear portion of the cut grass discharge port d with a bolt 50.
[0028]
Further, the central mulching baffle 40c is attached to the mounting hole 33 of the deck top plate 15a by using the bolt 51 that is erected and fixed directly on the front surface thereof and the bolt 51 that is erected and fixed via the support fitting 52. It has become. At the left and right ends of the central mulching baffle 40c, a forward-facing V-shaped space j formed at the junction of the left and right mulching baffles 40a and 40b and the central mulching baffle 40c, that is, at the boundary front of the adjacent shredded chamber. A guide member 53 for filling is fixed by welding. As shown in FIGS. 11 and 12, the guide member 53 is formed by bending a front plate portion 53a that closes the front opening of the V-shaped space j and a bottom plate portion 53b that closes the bottom of the V-shaped space j. The turf grass that has been introduced into the deck through the front wall 15c of the moor deck 15 is prevented from being gathered together in the V-shaped space j, and less cutting is left. ing.
In this case, the bottom plate portion 53b exhibits a function of suppressing the turf grass that has passed through the front plate portion 53a from standing up and entering the V-shaped space j.
[0029]
Further, the shredding chambers g and i of the left and right rotating blades 16 and 18 are formed in a circular shape concentric with the rotating blade rotation locus, and the shredding chamber h of the central rotating blade 17 is formed in the left and right rotating blades 16 and 18. The shredding chambers g and i are partially cut into the shape. In the left and right mulching baffles 40a and 40b, in order to avoid interference with the central rotating blade 17, the lower rotating mulching baffles 40a and 40b are cut at the lower part of the left and right mulching baffles 40a and 40b. A notch k is formed.
[0030]
[Standard side discharge form]
FIG. 15 shows a cross-sectional plan view of the mower M configured in a standard side discharge configuration in which long turfgrass is cut and discharged from the cut grass discharge port d. In this embodiment, the front baffle 30 and the shredding baffle 40 are removed, and the cut grass cut by the rotating blade of the upper conveyance is not guided to the cutting action area of the lower rotating blade, and the top plate 15a and the deck front wall 15c are quickly transported to the grass cutting outlet d and discharged, so that long turf grass can be cut without applying unnecessary shredding load.
[0031]
[Another embodiment]
The present invention can also be implemented in the following forms.
(1) The front baffle 30 may be integrally formed without being divided into two, and conversely, the removed front baffle 30 can be stored in a low bulk by using a three-part structure.
(2) The left and right mulching baffles 40a and 40b and the central mulching baffle 40c in the shredding baffle 40 may be integrated in advance by welding or the like. In this case, the shredding baffle 40 can be made highly rigid by using the guide member 53 as a connection reinforcing member for the left and right mulching baffles 40a, 40b and the central mulching baffle 40c.
(3) The means for detaching the front baffle 30 and the shredding baffle 40 from the mower deck 15 is not limited to the above structure. For example, a nut is welded and fixed to the upper ends of the front baffle 30 and the shredding baffle 40 In addition, a structure in which a bolt is inserted into the mounting hole 33 of the deck top plate 15a from above and fastened to the nuts of the front baffle 30 and the shredding baffle 40 can be appropriately selected and employed.
[Brief description of the drawings]
[Fig. 1] Overall side view of a riding lawn mower [Fig. 2] Overall plan view of a riding lawn mower [Fig. 3] Top view of a mower [Fig. 4] Schematic diagram of a transmission structure [Fig. 5] Moor is raised Partial cutaway side view showing condition "
6 is a cross-sectional plan view of a mower configured in a chopped side discharge configuration. FIG. 7 is a longitudinal rear view of a mower configured in a chopped side discharge configuration. FIG. 8 is a mower configured in a chopped side discharge configuration. [Figure 9] Cross-sectional plan view of the mower configured in the mulching configuration [Fig. 10] Vertical side view of the mower configured in the mulching configuration [Fig. 11] Shredding FIG. 12 is a cross-sectional plan view showing a part of the baffle for cutting. FIG. 12 is a vertical side view of the guide member provided in the shredding baffle. FIG. 13 is a perspective view showing a part of the shredding baffle. Exploded plan view showing components of baffle [Fig. 15] Transverse plan view of mower constructed in standard side discharge configuration [Explanation of symbols]
DESCRIPTION OF SYMBOLS 15 Moore deck 16 Rotating blade 17 Rotating blade 18 Rotating blade 40 Shredding baffle 53 Guide member 53a Front plate part 53b Bottom plate part g Shredded chamber h Shredded chamber i Shredded chamber j V-shaped space

Claims (2)

A shredding baffle that supports a plurality of rotating blades that are driven to rotate around the longitudinal axis in parallel inside the moor deck, and that forms a circular shredding chamber that surrounds the rotational trajectory of each rotating blade. In the established moore,
The baffle for shredding is provided with a guide member for preventing grass from entering the forward-facing V-shaped space formed at the front boundary of the adjacent shredding chamber ,
The guide member includes a bottom plate portion that closes a bottom portion of the V-shaped space,
The guide member is configured such that a front edge along the tangent line is linear in a plan view at a position rearward of a tangent line connecting the rotation trajectories of the rotating blades adjacent to the guide member. Mohr.   The mower according to claim 1, wherein the guide member includes a front plate portion that closes a front opening of the V-shaped space.

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