JP2009195206A - Mower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mower having in a mower deck a plurality of cutting chambers mutually communicated and arranged in a lateral direction, and equipped, in each cutting chamber, with a blade mounted to be rotatable around a vertical axis, wherein mowing operation mode is enabled to be easily changed on the working site. <P>SOLUTION: Grass guide elements 31 capable of slidingly moving along a peripheral wall of the cutting chamber to attend and retreat at the communicating part of the neighboring cutting chamber are equipped. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mower used mainly for mowing.

As mowers for mowing, a plurality of rotating blades that are driven to rotate around the vertical axis are arranged in parallel inside a flat deck type mower deck with a flat ceiling surface, and at the inner front of the mower deck. There is known one provided with a front baffle plate having a shape along the tip rotation trajectory of the rotating blade (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2004-41060

It is necessary to switch the mower deck's internal configuration for mowers that use the mowing work mode separately between the side discharge mode and the mulching mode. Conventionally, in the mulching mode, the cutting chamber of each rotating blade is attached by attaching a shuffle baffle plate. In the side discharge mode, the cutting chamber of each rotary blade is communicated by removing the shredding baffle plate. As a result, the switching work of the mowing work form becomes large, and the switching work requires a great amount of work and time.
When the mowing operation mode is switched at the work site, it is necessary to carry the shredding baffle plate to the work site, and it is necessary to carry and store this.

  The present invention has been made paying attention to such a point, and an object thereof is to make it possible to easily change the mowing work mode even at a work site.

In the first aspect of the present invention, the plurality of cutting chambers communicating with each other inside the mower deck are arranged in parallel in the transverse direction, and each cutting chamber is equipped with a rotary blade that is driven to rotate around the longitudinal axis.
It is characterized by being equipped with a grass cutting guide member that slides along the peripheral wall of the cutting chamber and that can be withdrawn / retracted from / to the communicating portion of the adjacent cutting chamber.

According to the above configuration, the mowing operation mode can be adjusted by changing the opening degree at the communicating part of the adjacent cutting chambers by sliding adjustment of the grass cutting guide member and changing the flow state of the mowing grass between the cutting chambers. . Since this mowing guide member is always provided on the mower deck, it is possible to adjust the mowing work mode at any place and time. If the mowing guide member is fixed by bolting, it is only necessary to carry a tool for bolt operation at the work site.
Therefore, according to the first invention, the desired mowing work can be performed by adjusting the mowing work mode easily and quickly at the work site.

According to a second invention, in the first invention,
The mowed grass guide member is configured to be movable between a side discharge position for opening the communication part of the adjacent cutting chamber and a mulching position for blocking the communication part of the adjacent cutting chamber and making each cutting chamber independent. It is something.

  According to the said structure, the mowing work form in a side discharge form and the mowing work form in a mulching form can be switched easily and easily.

  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 riding-type lawn mower, the mower M has a quadruple link structure below the 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 structure is supported by suspension through the mechanism 4, and the mower M can be moved up and down substantially in parallel by moving the link mechanism 4 up and down with a hydraulic cylinder 5. An engine 6 is mounted on the rear part of the traveling machine body 3, and a driver's seat 7 and a portal-shaped fall protection frame (ROPS) 8 are arranged on the front part thereof.

  The mower M is configured to be able to select a side discharge mode in which the cut grass is discharged from the right end and a mulching mode in which the cut grass is shredded within the cutting width and left on the passage of the mower M. As shown in FIGS. 9 and 10, in the side discharge mode, the mowing grass discharged to the right end of the mower M is forcibly conveyed to the rear side of the machine body by the discharge blower 35 and is put into the recovery bag 37.

  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 transmitted separately to the left and right rear wheels 2 via the deceleration case 10. The continuously variable transmission that drives the left and right rear wheels 2 swings the left and right rear levers individually by swinging a pair of left and right travel levers 11 that are arranged to swing back and forth on both sides of the driver's seat 7. The wheels 2 are independently steplessly shifted forward and backward, and 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. ing. The power of the work system branched by the counter case 9 is output forward from the PTO shaft 12 projecting from the lower front surface of the counter case 9 and transmitted to the mower M.

  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 manner in a plan view so as to be displaced slightly forward, and is pivotally supported. When the traveling machine body 3 moves straight forward, the tip rotation trajectory of the adjacent rotary blades 16L, 16C, 16R The left and right ends of the are overlapped in the front and back so that mowing without uncutting can be performed.

  The mower deck 15 is configured as a flat deck whose top plate height is set to the same overall height, and a discharge port d is formed at the right end of the mower deck 15. On the inner front side of the mower deck 15, along the front baffle plate 18 bent in a waveform along the front part of the tip turning locus in the rotating blades 16L, 16C, 16R, and the rear part of the tip turning locus. A rear baffle plate 19 that is bent into a corrugated shape is vertically arranged, and a series of long cutting spaces on the left and right sides in which the cutting chambers of the rotary blades 16L, 16C, and 16R communicate with each other are formed in the mower deck 15.

  As shown in FIG. 3, the power of the work system taken out 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, The rotational power converted into the vertical axis rotation by the case 21 is transmitted to the rotary shaft 23C of the central rotary blade 16C. The rotating shaft 23C of the central rotating blade 16C and the rotating shafts 23L, 23R of the left and right rotating blades 16L, 16R are wound and interlocked by the belt 24, and the first half of the tip rotation locus in the rotating blades 16L, 16C, 16R is the discharge port. The rotating blades 16, 17, and 18 are driven to rotate at the same speed in the same direction (clockwise direction when viewed from above) so as to go to the d side. 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 contacting the ground and scraping the ground. It has become.

  In the mower M, the mowing work mode can be changed and adjusted by the following structure. As shown in FIGS. 4 to 6, the left baffle plate 16 </ b> L is slid in the circumferential direction along the circumferential wall of the front baffle plate 18 that forms the circumferential wall in front of the cutting chamber. A partially arcuate mowing guide member 31 that can be withdrawn and withdrawn is provided at a communication site between the cutting chamber and the cutting chamber of the central rotary blade 16C. The rear baffle plate 19 that forms the peripheral wall behind the cutting chamber slides in the circumferential direction along the peripheral wall of the cutting chamber, and communicates between the cutting chamber of the left rotating blade 16L and the cutting chamber of the central rotating blade 16C. And a retractable partial arc-shaped mowing guide member 31 is provided, and a retractable partial arc-shaped mowing guide is provided at a communicating portion between the cutting chamber of the central rotating blade 16C and the cutting chamber of the right rotating blade 16R. A member 31 is provided, and a partial arc-shaped mowing guide member 31 that is slidable in the circumferential direction along the peripheral wall of the cutting chamber and can be withdrawn and withdrawn from the discharge port d is provided.

  As shown in FIGS. 5 and 7, the front peripheral wall in the cutting chamber of the left rotating blade 16L and the front peripheral wall in the cutting chamber of the right rotating blade 16R among the inner peripheral surfaces of the front baffle plate 18 are formed. In the place, an adhesion preventing member 32 such as a sheet-like or plate-like rubber material or a resin material is attached, so that soil or cut grass is difficult to adhere or even if it adheres, it is easily peeled off. .

  The mower M according to the present invention is configured as described above. By changing the internal form of the mower deck 15, the side discharge form in which the cut mowing grass is discharged from the discharge port d on the right end of the deck or the mowing grass is repeatedly subdivided. It is possible to select a mowing work mode in a mulching mode that is left on the passage mark of the mower M after cutting.

[Side discharge form]
FIG. 4 shows a side discharge form. In this embodiment, the cutting grass communication members 31 provided on the front baffle plate 18 and the rear baffle plate 19 are respectively slid back (corresponding to the side discharge position) to communicate the cutting chambers in the rotary blades 16L, 16C, and 16R. The part is opened and communicated to the maximum, and the discharge port d at the right end of the mower deck 15 is opened. As a result, the mowed grass cut by the rotating blades 16L, 16C, and 16R is scattered and conveyed toward the right in FIG. 4 along the front baffle plate 18 that forms the front peripheral wall of the cutting chamber. Is discharged from the discharge port d.

[Mulching form]
FIG. 5 shows a mulching configuration. In this embodiment, the grass cutting guides 31 provided on the front baffle plate 18 and the rear baffle plate 19 are respectively moved forward to close the communication portions of the cutting chambers in the rotary blades 16L, 16C, and 16R, and the mower deck 15 Is closed (corresponding to the position for mulching). As a result, in the independent cutting chambers of the rotating blades 16L, 16C, and 16R, the mowing grass is carried around and chopped and left on the passage of the mower M.

  In the mulching form, not only the opening degree of the communication part in each cutting chamber is fully opened or fully closed, but also the sliding amount of other grass cutting guide members 31 excluding the grass cutting guide member 31 that closes the discharge port d depending on the grass condition. The mowing operation can be performed by appropriately adjusting the opening and closing, and arbitrarily adjusting the opening degree of the communication portion between the cutting chambers.

[Another embodiment]
The present invention can also be implemented in the following forms.
(1) As shown in FIG. 8, an opening 33 for introducing outside air may be formed in the rear wall of the mower deck 15, and the opening 33 may be configured to be openable and closable and the opening degree adjustable by a slide shutter 34. According to this, for example, when the density of grass is high, increasing the opening of the opening 33 and increasing the amount of outside air to be sucked can increase the standing performance of the grass, so that the cutting height is uniform. Mowing is possible. In the case where the density of grass is high, if the amount of outside air sucked from the opening 33 is large, the grass tends to fly violently and the cutting height tends to be non-uniform. The opening is reduced or the opening 33 is closed.

  (2) The case where the mowed grass cut in the side discharge form is collected is shown in FIGS. In this case, the mowed grass discharged from the discharge port d at the right end of the mower deck 15 is supplied to the discharge blower 35, and the mowed grass discharged from the discharge blower 35 is wind-fed through the duct 36 to the rear of the machine body and put into the collection bag 37. Will do. An upper cover 38 connected to the rear end of the duct 36 is provided at the upper part of the collection bag 37, and a grass collection net 39 for extracting the conveying air is provided at the upper part of the upper cover 38 and blown into the upper cover 38. The transported air escapes upward through the grass collection net 39 and passes through the upper exhaust passage h1 formed in the upper part of the upper cover 38 and the rear air passage h2 formed in the rear wall 38a of the upper cover 38. It is discharged downward. The rear wall 38a of the upper cover 38 is supported so as to be able to swing up and down around the upper fulcrum p, and the grass net 39 is inserted into the left and right guide rails 40 so as to be slidable back and forth. It is fastened and fixed, and the upper cover 38 is swung open to loosen the bolt 41 with the knob so that the grass collection net 39 can be extracted rearward.

  As shown in FIGS. 14 to 16, the discharge blower 35 that wind-carryes mowed grass into the collection bag 37 has a vertical axis rotating blade 43 housed in a resin-molded casing 42 and belt-linked to the right rotating blade 16R. It is configured to be connected and driven. A connection port e is provided at the left end portion of the casing 42 so as to communicate with the discharge port d at the right end of the mower deck 15. The connection port e is provided with a flange portion 44, and is connected to the small mower deck 15 having a small discharge port d in a state where the flange portion 44 is left as shown in FIGS. The In this case, the guide plate 29 is attached so that the mowing grass does not stay in the space inside the flange portion 44. As shown in FIG. 17, the flange portion 44 is cut out in accordance with the size of the discharge port d and connected to the large mower deck 15 having a large discharge port d.

Overall side view of a riding lawn mower Overall plan view of a riding lawn mower Moor's top view Transverse plan view of mowers configured in side discharge configuration Cross-sectional plan view of moor constructed in mulching form Longitudinal side view of moor constructed in mulching form Mower's front baffle plate longitudinal side view Rear view showing the central part of the mower deck Overall side view of a riding-type lawn mower configured in a mowing grass collection form Overall plan view of a riding lawn mower configured in a mowing grass collection form Longitudinal side view of upper cover and collection bag Top view of top cover grass net XII-XII sectional view in FIG. Longitudinal side view of small mower deck outlet and blower Longitudinal rear view of small mower deck outlet and blower Partial cutaway plan view of small mower deck outlet and outlet blower Longitudinal side view of a large mower deck outlet and blower

Explanation of symbols

15 Moor deck 16L Rotating blade 16C Rotating blade 16R Rotating blade 31 Mowing guide member

Claims (2)

In a mower equipped with a plurality of cutting chambers communicated with each other inside the mower deck in the lateral direction, and each cutting chamber is equipped with a rotating blade that is driven to rotate around the longitudinal axis.
A mower characterized by being equipped with a mowing guide member that slides along the peripheral wall of the cutting chamber and that can be moved back and forth to a communicating portion of the adjacent cutting chamber.   The mowed grass guide member is configured to be movable between a side discharge position that opens a communication part of an adjacent cutting chamber and a mulching position that blocks the communication part of an adjacent cutting chamber and makes each cutting chamber independent. The mower according to claim 1.

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