JP4104139B2 - Moore - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
According to the present invention, a shredding baffle that divides and forms a shredding chamber for each rotating blade is detachably attached to a moor deck equipped with a plurality of rotating blades in parallel. A wall surface is provided opposite to each rotating blade, and by removing the shredding baffle, the mowing grass collected by each rotating blade is collected and discharged from the discharge port formed in the mower deck in a normal discharge form, The present invention relates to a mower capable of performing mowing work in a mulching form in which cut grass is shredded for each rotating blade and left on a cut trace by attaching a shredding baffle.
[0002]
[Prior art]
Conventionally, as a structure the mower so as to select a normal discharge mode and mulching mode, to form a chopped chamber independently for each rotation blade using the shredding baffle sheet metal structure (Patent Document 1 see) and, to form a chopped chamber for each rotation blade using the shredding baffle configured in a hollow block shape (see Patent Document 2), and the like are known.
[0003]
[Patent Document 1]
US Pat. No. 5,987,863 specification
[Patent Document 2]
US Pat. No. 5,628,171
[Problems to be solved by the invention]
The shredding baffle used for the mowing operation in the mulching form has a partial arc shape in plan view along the rotational trajectory of the rotating blade in order to retain the cut grass and recut each shredded chamber of each rotating blade. However, the shredding baffle used in the inventions described in Patent Document 1 and Patent Document 2 is configured as a vertical wall surface. In addition, the cut grass that has been cut off from the planted grass and swung up will swirl and flow along a right-angled corner space formed by the guide vertical wall surface of the shredding baffle and the deck ceiling surface. Depending on the situation such as the plant height, the amount of cutting per unit time, the wetness, etc., the cutting and cutting performance may be deteriorated due to the attachment and retention of the cut grass in the right-angled corner space.
[0006]
In addition, the shredding baffle used in the above conventional structure is divided into a plurality of parts, and the baffle parting position is located on one of the guide vertical wall surfaces of the partitioned shredding chamber. Therefore, there is a risk that large deposits may occur due to adhesion and growth of mowing grass and dust in the small gaps and steps formed in the divided portions.
[0007]
The present invention has been made paying attention to such a point, and by improving the shredding baffle, the occurrence of adhesion accumulation of mowing grass in the deck is suppressed, and mulching with high shredding efficiency is achieved. with the mowing operation can be performed well in the form, it is an object of the present invention to provide a superior mower in practicability which can be easily carried out desorption operation of shredding baffle.
[0008]
[Means for Solving the Problems]
[0009]
The characteristic configuration of the present invention is that three rotating blades are installed inside the mower deck in a triangular arrangement in which the central rotating blade is positioned in front of the left and right rotating blades, and a shredder chamber for each rotating blade is provided. A shredding baffle that forms a section is detachably attached, and the shredder baffle is provided with an inward guide vertical wall surface facing each rotary blade,
The guide vertical wall surface provided for each shredding chamber is integrally formed in a single shredding baffle, and the guide vertical wall surface for each shredding chamber is inclined closer to the center of the shredding chamber as it approaches the deck ceiling surface. Configured on the wall surface, configured so that a part of each guide vertical wall surface overlaps the tip rotation trajectory of the rotating blade as seen from the blade rotation axis direction,
In addition, the central guide vertical wall surface of the plurality of guide vertical wall surfaces covers a large angular phase range in the blade rotation direction so that the rotary blade and the guide vertical wall surface always overlap each other when viewed from the blade rotation axis direction. A small angle phase range in the blade rotation direction is formed so that the other rotating guide blade wall surface does not overlap when viewed from the blade rotation axis when the rotating blade is set to a predetermined rotation phase. It is formed over.
[0010]
According to the above configuration, in the discharge mode in which the shredding baffle is removed, the cut grass cut by each rotating blade is collected and discharged together from the discharge port formed in the deck.
[0011]
Further, in the mulching mode fitted with shredding baffle, grass clippings was splashed by the rotating blade is mowed pivots flow along the guide longitudinal wall of the shredding baffle in each chopped chambers which are partitioned and formed . In this case, the grass that swirls and flows is guided by the inclined guide vertical wall surface and guided to approach the center of the shredded chamber as it approaches the deck ceiling surface. The cutting blade is again subjected to the cutting action by the rotating blade rotating at high speed, and this is repeated, so that the cut grass is shredded and left on the mower passage mark.
[0012]
In this case, since the guide vertical wall surface corresponding to each shredded chamber is formed in a series and there is no divided part, mowing grass and garbage flowing along the guide vertical wall surface are stuck or stuck to the divided part. There is no progress.
[0013]
Here, when switching the operation mode of the above two specifications, it is necessary to detach the baffle for shredding, but in the shredding chamber in which the guide vertical wall surface is formed over a small angle phase range, The rotating blade can be manually rotated and adjusted to a rotation phase that does not interfere with the guide vertical wall surface. However, in a shredded chamber in which the guide vertical wall surface is formed over a large angular phase range in the blade rotation direction, Even if the rotation is adjusted to the phase, one end of the rotating blade always interferes with the guide vertical wall surface. Therefore, the rotating blade is removed in this shredding chamber.
[0014]
If the guide vertical wall surfaces corresponding to the shredding chambers formed in parallel are all formed over a small angle phase range, the shredding baffle can be attached and detached with all the rotating blades in a rotational phase that does not interfere with the shredding baffle. On the other hand, because the existence range in the rotation direction of the guide vertical wall surface in each shredded chamber becomes narrow, a wide opening is created at the boundary between adjacent shredded chambers, and shredded The independence of the chamber is lowered, and the outflow of the cut grass from the shredded chamber is likely to occur, and the shredding performance is adversely affected. On the other hand, if the guide vertical wall surface of any one shredded chamber is formed over a large angular phase range, the shredded chamber with the guide vertical wall surface and the shredded chamber adjacent to the shredded chamber The width of the opening at the boundary portion between them becomes narrow, the independence of each shredding chamber is increased, and adverse effects on shredding performance can be reduced.
[0015]
Therefore, according to the present gun invention this, the grass clippings thrown up being cut, since guided by inclined guiding vertical wall surface of the shredding baffle, no corner space quadrature that may grass clippings adheres residence, back to shredding chamber central side splashed can you reduced to cutting action zone of rapidly rotating blades, it has become possible to perform the mowing operation at high chopped efficient mulching mode.
[0016]
In addition, when the guide vertical wall surface is inclined, the shredding baffle overlaps with the blade tip rotation trajectory when viewed from the blade rotation axis direction, which hinders the removal and removal of the shredding baffle. By rationally setting the existence range in the rotation direction of the guide vertical wall surface corresponding to each of the shredding chambers, it is possible to interfere with the rotating blades that do not remove the shredding baffle by simply removing one rotating blade. Therefore, it is easy to handle for changing the work mode and has excellent practicality.
[0017]
[0018]
According to the above configuration, only the guide vertical wall surface of the central shredding chamber shredding chamber adjacent to the left and right sides, by forming over a large angular phase range in blade direction of rotation, the center of the shredding chamber right The opening at the boundary portion between the shredding chambers on both sides can be made narrow, and the present invention can be suitably applied to a three-blade mower.
[0019]
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 has a quadruple link structure in the 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. 4 is configured to be suspended and supported by a hydraulic cylinder 5 so that the mower M can be moved up and down substantially in parallel. In addition, an engine 6 is mounted on the rear portion of the traveling machine body 3, and a driver seat 7 and a gate-shaped overturn protection frame (ROPS) 8 are disposed on the front portion thereof.
[0020]
Although the detailed description of the structure is omitted, the output of the engine 5 is input to the counter case 9 and branched into the traveling system and the working system, and the power of the traveling system is not shown in the figure disposed on the left and right sides of the counter case 9. It is input to a pair of left and right hydraulic continuously variable transmissions (HST), and the shift output is separately transmitted to the left and right rear wheels 2 via the deceleration case 10. Then, the continuously variable transmission that drives the left and right rear wheels 2 shifts the left and right traveling levers 11 provided on the left and right sides of the driver's seat 7 so as to be able to swing back and forth separately. The rear wheels 2 are independently and continuously stepped forward and backward, so that the forward and backward travel, the pivot turn, and the spin turn can be arbitrarily performed by operating the left and right traveling levers 11. It has become. The power of the branched working system is output toward the front from the PTO shaft 12 projecting from the lower front of the counter casing 9, and is transmitted to the mower unit M as you later.
[0021]
As shown in FIGS. 3 and 4, the mower M includes three rotary blades 16 </ b> L, 16 </ b> C, and 16 </ b> R that are driven to rotate about the longitudinal axis inside the mower deck 15 that is opened downward. 16C is arranged in a triangular arrangement in a plan view so that it slightly deviates forward and is pivotally supported, and the mower deck 15 is configured as a flat deck whose top plate height is set to the same overall height. In addition, a discharge port d provided with an outlet cover 17 for preventing scattering is formed at the right end.
[0022]
Further, inside the moor deck 15, the front vacuum plate 18 that is shallowly bent along the front portion of the tip rotation locus in each of the rotating blades 16L, 16C, and 16R, and the rear side of the tip rotation locus. A deeply bent rear vacuum plate 19 is fixed, and a series of chopping chambers in which the chopping spaces of the rotary blades 16L, 16C, and 16R communicate with each other widely are formed in the deck.
[0023]
The working power extracted from the PTO shaft 12 is transmitted to a bevel gear case 21 disposed on the upper center surface of the mower deck 15 via a bendable / extendable shaft transmission mechanism 22, and the bevel gear case 21 rotates in the vertical axis. The rotational power converted into is transmitted to the rotary shaft 23C of the central rotary blade 16C, and the rotary shaft 23C and the rotary shafts 23L, 23R of the left and right rotary blades 16L, 16R are wound and interlocked by the belt 24, All the rotating blades 16, 17, 18 are rotationally driven at the same speed in the same direction (clockwise as viewed from above) so that the first half of the rotation locus of each rotating blade 16L, 16C, 16R is directed toward the discharge port d. It has become so. An idle wheel (anti-scal roller) 25 for getting over obstacles is provided around the moor deck 15, and the mower M suspended and supported by the link mechanism 4 with upward movement flexibility is provided with a slope on the ground. When approaching the raised portion or the like, any of the freewheeling wheels 25 rides on the raised portion or the like, so that the mower M is relatively lifted, and the mower deck 15 is prevented from directly contacting and scraping the ground. It has become.
[0024]
This moor M is designed to change the internal specifications of the mower deck 15 so that the mowing grass is discharged from the discharge port d on the right end of the deck, and the mowing grass is shredded sufficiently and then the mower passes. It is possible to select mowing work in two types of mulching forms to be left, and the configuration of each form will be described below.
[0025]
[Side discharge form]
FIGS. 3 and 4 show plan views of the mower M in the standard side discharge form as seen from the top side and the bottom side. In this form, the mower M is cut by the rotary blades 16L, 16C, and 16R. The cut grass is quickly conveyed along the top plate 15a and the front vacuum plate 18 toward the right side in the figure, and is smoothly discharged from the discharge port d at the right end of the deck.
[0026]
[Mulching form]
FIGS. 5 and 6 are a plan view and a perspective view, respectively, of the mower M configured in a mulching form as seen from the bottom surface side, and FIGS. 9 to 12 show vertical cross-sectional views of the respective portions. In this embodiment, a shredding baffle 26, which is made hollow by molding a resin material, is attached along the inside of the front vacuum plate 21, and the shredding baffle 26 and the rear vacuum plate 19 work together. Thus, substantially circular shredded chambers 27L, 27C, and 27R surrounding the rotation trajectories of the respective rotating blades 16L, 16C, and 16R are formed for each blade, and each of the rotating blades 16L, 16C, and 16R has its own shape. The cut grass is shredded repeatedly in the shredding chambers 27L, 27C, 27R.
[0027]
The shredding baffle 26 of the resin molded product includes a first baffle 26L facing the front part of the rotating blade (left) 16L, a second baffle 26C facing the front part of the rotating blade (center) 16C, A third baffle 26R that closes the outlet d and faces the front part of the rotating blade (right) 16R is integrally formed in series, and as shown in FIGS. 8 and 12, the top plate 15a of the mower deck 15 and the front part The three bolts 29 inserted from above into the connecting hole 28 of the deck top plate 15a are fastened to the insert nuts 30 on the upper surface of the baffle while being attached to the corner formed by the inner surface of the vacuum plate 18. The cutting baffle 26 is fixed in a predetermined posture stably and firmly.
[0028]
The inner surfaces of the first baffle 26L, the second baffle 26C, and the third baffle 26R in the shredding baffle 26 are curved in a substantially arc shape along the tip rotation trajectory of each rotary blade 16L, 16C, 16R in plan view. The guide vertical wall surface g is configured to receive and guide the cut grass that has been cut and bounced off by the bending blades f at both ends of the rotary blade. And this guide vertical wall surface g is comprised in the inclined surface which approached the blade rotating shaft center and approached inwardly and curved toward the deck ceiling surface. In this way, by forming the guide vertical wall surface g for each of the shredding chambers 27L, 27C, and 27R in the shredding baffle 26, the shredding chambers 27L, 27C, and 27R have the rotating blades 16L, 16C, and 16R. The cut grass that has been cut and spun up by the rotation swirls along the guide vertical wall surface g and gradually falls due to its inclination, with the blade rotation axis centering on the side and falling, and the cutting action by the rotary blades 16L, 16C, and 16R. the repeated received, will be going to be efficiently shredded.
[0029]
Here, the guide vertical wall surface g of the first baffle 26L and the third baffle 26R of the left and right in the shredding baffle 26, angular phase range of the blade rotating direction is set smaller than 180 °, rotation blade 16L, When 16R is set to a predetermined rotational phase, the rotary blades 16L and 16R and the guide vertical wall surface g do not overlap each other when viewed from the blade rotation axis direction. In addition, the guide vertical wall surface g of the central second baffle 26C is set to have an angular phase range larger than 180 ° in the blade rotation direction, and the guide vertical wall surface g regardless of the rotation phase of the rotary blade 16C. At least one end of the rotary blade 16C overlaps when viewed from the blade rotation axis direction.
[0030]
Thus, when the shredding baffle 26 provided with the guide vertical wall surface g overlapping the tip rotation trajectory of each of the rotating blades 16L, 16C, 16R as viewed from the blade rotation axis is shown in FIG. In this manner, the left and right rotary blades 16L and 16R are turned sideways, and only the central rotary blade 16C is removed from the rotary shaft 23C, so that the shredding baffle 26 is attached to and detached from the predetermined position along the front vacuum plate 18. can do.
[0031]
Further, adjacent shredded chambers 27 communicate with each other through an opening w having a small front and rear width at a portion where the blade line trajectory approaches, and the cut grass of one shredded chamber 27 passes through the opening w. If it passes through and flows out into the adjacent shredding chamber 27 , shredding performance is degraded. Therefore, the corrugated head formed at the connecting portion between the first baffle 26L and the second baffle 26C and the corrugated head formed at the connecting portion between the second baffle 26C and the third baffle 26R are as follows. By devising, the grass cutting outflow at the opening w is prevented.
[0032]
That is, as shown in FIG. 13, the second vertical baffle 26 </ b> C is deflected toward the end of the guide vertical wall surface g in the blade rotation direction more toward the rotation axis than the tangential direction with respect to the tip rotation locus of the rotation blade 16 </ b> C. An end guide surface h that guides the mowing grass and discharges it into the shredding chamber 27C is provided, so that the mowing grass swirling along the guide vertical wall surface g does not flow toward the opening w.
[0033]
Further, the starting end of the blade rotation direction of the guiding longitudinal wall surface g at the third baffle 26R, start guide surface i was a bit inclined toward the shredding chamber 27R side are provided, thus being swirling fluidized in rotating blades 16R Then, the cut grass that reaches the opening w is guided to the shredded chamber 27R side by the leading end guide surface i, thereby preventing the cut grass from flowing out from the shredded chamber 27R to the adjacent shredded chamber 27C.
[0034]
Although not shown, a terminal guide surface h similar to that described above is provided at the terminal end of the first baffle 26L in the blade rotation direction of the guide vertical wall surface g, and the guide vertical wall surface g of the second baffle 26C is provided. The starting end guide surface i similar to the above is also provided at the starting end in the blade rotation direction, and the outflow of cut grass from the shredded chamber (left) 27L to the shredded chamber (center) 27C and the shredded chamber (center) ) Prevents outflow of cut grass from 27C to shredded chamber (left) 27L.
[0035]
[Another embodiment]
The present invention can also be implemented in the following forms.
(1) As shown in FIG. 14, a single bolt 31 and a plurality of hooks 32 are provided as inserts on the upper surface of the shredding baffle 26, and the bolts 31 are inserted into the connecting holes 28 of the deck top plate 15a. 33, and the hook 32 is locked and connected to a receiving tool 34 provided by welding or cutting to the deck top plate 15a, so that the shredding baffle 26 can be easily detached without requiring a tool. This is effective in improving the handleability. Further, since there is only one connecting hole 28 provided in the deck top plate 15a, fine mowing grass and dust are less likely to flow out of the connecting hole 28 during work in the standard discharge mode.
(2) By carrying out the cross-sectional shape of each guide vertical wall surface g with the shredding baffle 26 in the linear inclined surface, it is possible to perform the mowing operation at high mulching forms of chopped efficiency However, in order to increase the corner space for turning and guiding the cut grass that has been cut off and raised, the processing ability is increased, and the inclined surface that is straightly recessed with an obtuse angle or the above As described above, it is desirable to use an inclined surface that is concavely curved.
[0036]
(3) Although the shredding baffle 26 is a resin molded product obtained by blow molding, it is advantageous in terms of weight reduction, but there is a problem of wear of the shredding baffle 26 depending on the type of turf grass and the soil conditions of the turf. In this case, a shredded baffle made of sheet metal that has been press-worked or welded can also be employed.
[0037]
(4) In the above embodiment, the three-blade mower M is illustrated, but the present invention can also be applied to a two-blade type.
[0038]
(5) In the above embodiment, the mower M of the side discharge specification that discharges the cut grass from the discharge port d at the side of the deck is illustrated. However, the mower M may be applied to a rear discharge specification that has a discharge port at the rear of the moor deck. Is possible.
[Brief description of the drawings]
[Fig. 1] Overall side view of a riding lawn mower [Fig. 2] Overall plan view of a riding mower [Fig. 3] Plan view showing a mower in a side discharge configuration [Fig. 4] An inverted mower in a side discharge configuration Top view [Fig. 5] A plan view of a mulching-type mower with the front and back reversed [Fig. 6] An exploded perspective view of a mulching-type mower with the front and back inverted [Fig. 8] A mulching FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. 5. FIG. 10 is a cross-sectional view taken along the line XX in FIG. 5. FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG. XII-XII cross-sectional view in FIG. 5 [FIG. 13] Plan view showing the main part of the shredding baffle [FIG. 14] Longitudinal cross-sectional view showing another embodiment of the shredding baffle mounting structure [Explanation of symbols]
15 Moore deck 16 Rotating blade 26 Shuffle baffle 27 Shred chamber g Guide vertical wall

Claims (1)

A shredding baffle that equips the interior of the mower deck with three rotating blades in a triangular arrangement in which the central rotating blade is positioned in front of the left and right rotating blades, and defines a shredding chamber for each rotating blade. A mower having a shredding baffle with an inward guide vertical wall facing each rotary blade,
The guide vertical wall surface provided for each shredding chamber is integrally formed in a single shredding baffle, and the guide vertical wall surface for each shredding chamber is inclined closer to the center of the shredding chamber as it approaches the deck ceiling surface. Configured on the wall surface, configured so that a part of each guide vertical wall surface overlaps the tip rotation trajectory of the rotating blade as seen from the blade rotation axis direction,
In addition, the central guide vertical wall surface of the plurality of guide vertical wall surfaces covers a large angular phase range in the blade rotation direction so that the rotary blade and the guide vertical wall surface always overlap each other when viewed from the blade rotation axis direction. A small angle phase range in the blade rotation direction is formed so that the other rotating guide blade wall surface does not overlap when viewed from the blade rotation axis when the rotating blade is set to a predetermined rotation phase. A mower characterized by being formed over a wide area.

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