JP2010000023A - Grass mower, and lid body used for grass mower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a discharging work while performing a mown grass-discharging work smoothly, and also a mulching work while performing mown grass-chopping in a good accuracy as simple operations in a grass mower having grass-mowing blades capable of freely drive-rotating around a shaft core facing in the vertical direction of a blade housing and positioning side by side in the transverse direction of the grass-mowing blade housing, at the inside of the grass-mowing blade housing and equipped with a mown grass-discharging port installed at the upper position of a part where a pair of grass-mowing chambers adjacent to the blade housing are communicated. <P>SOLUTION: This grass mower is equipped with a lid body 60 for opening and closing the mown grass-discharging port 29. The lid body 60 is equipped with a posterior part baffle plate 63. The baffle plate 63, in a state that the lid body 60 closes the mown grass-discharging port 29, forms the posterior side wall 28a of a pair of mowing chambers 28, 28 by positioning at the posterior side of the grass-mowing blade 26 performing the grass-mowing in the adjacent pair of grass-mowing chambers 28, 28. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  According to the present invention, a cutting blade that can be driven and rotated around the vertical axis of the cutting blade housing is arranged side by side in the horizontal direction of the cutting blade housing, and a pair of cutting chambers adjacent to the cutting blade housing is provided inside the cutting blade housing. The present invention relates to a grass cutting device provided with a cut grass discharge port arranged and provided above a communicating portion, and a lid used for the grass cutting device.

As the above mowing apparatus, there has been a mower described in Patent Document 1, for example.
The mower 14 described in Patent Literature 1 includes a mower deck 28 (corresponding to a cutting blade housing), a cutting blade 31, and a grass discharge passage 33 (corresponding to a cut grass discharge port). (Reference numerals 14, 28, 31, and 33 are those described in the publication.)

JP 2003-289709 A

When performing mowing, mulching is performed while discharging the cut grass while discharging the cut grass from the cutting blade discharge port of the cutting blade housing, or cutting the cut grass with the cutting blade inside the cutting blade housing and discharging it to the work location. I do work.
In the above-mentioned mowing apparatus, even if the cut grass discharge port is opened to perform a discharge operation or the cut grass discharge port is closed to perform a mulching operation, the cut grass is discharged smoothly by simply opening and closing. Difficult problems or problems in which cutting of cut grass is difficult to be performed tend to occur.
In other words, even if the cut grass outlet is closed so that the cut grass stays in the cut blade housing, if the side wall of the cut room is not in place, poor cutting and insufficient rotation of the cut grass by the cutting blade in the cutting room will occur. This makes it difficult to cut the cut grass sufficiently.
Even if the cut grass outlet is opened so that the cut grass is discharged from the cutting housing, if the side wall of the cutting room exists in the vicinity of the cut grass outlet, the cut grass will flow out as an obstacle. It becomes difficult.

  An object of the present invention is to make it easy to operate a discharge operation while smoothly discharging cut grass and a mulching operation while accurately cutting cut grass.

According to the first aspect of the present invention, a pair of cutting blades adjacent to the cutting blade housing are disposed inside the cutting blade housing, and the cutting blades that can be driven and rotated around the vertical axis of the cutting blade housing are arranged side by side in the horizontal direction of the cutting blade housing. In the mowing apparatus provided with the cut grass discharge port provided above the part where the chambers communicated,
A lid that opens and closes the cut grass outlet;
A rear baffle plate that is located on the rear side of a cutting blade that cuts grass in the pair of adjacent mowing chambers with the lid closing the cut grass discharge port and forms a rear wall of the pair of adjacent mowing chambers Is provided on the lid.

According to the configuration of the first aspect of the present invention, when the cut grass outlet is closed, the rear baffle plate included in the lid is located on the rear side of the pair of adjacent cutting blades to form the rear side walls of the pair of cutting chambers, The cutting grass is easily carried by the cutting blade in the cutting room, and the cutting grass is easily shredded. The cut grass is discharged from the cutting chamber to the ground without being discharged from the cut grass discharge port.
On the other hand, when the cut grass discharge port is opened, the rear baffle plate included in the lid body is detached from the rear side of the pair of cutting blades, and the rear side walls of the pair of cut chambers are eliminated. It becomes easy to flow to the cut grass outlet. The cut grass discharge port discharges the cut grass from each cutting room.

  Therefore, the mulching operation can be performed by closing the cut grass discharge port with the lid, and the cut grass can be shredded with high accuracy. By opening the cut grass discharge port, discharge work can be performed, and the cut grass can be discharged smoothly.

  According to the second aspect of the present invention, a partition wall that is positioned between the pair of adjacent mowing chambers with the lid closing the cut grass discharge port and that partitions the pair of adjacent mowing chambers is provided on the lid body. I have it.

  According to the configuration of the second aspect of the invention, when the cut grass discharge port is closed, the partition wall provided in the lid is located between a pair of adjacent cutting chambers to partition the pair of cutting chambers, and the mowing in each cutting chamber The cutting grass can be carried around better by the blade, and the cutting grass can be more easily shredded.

  Therefore, the cut grass can be shredded more accurately during the mulching operation.

The third aspect of the invention comprises the lid body detachably,
By connecting to the cutting blade housing, a duct lower structure attached to the cutting blade housing so as to form a lower portion of a cutting grass discharge duct extending from the cutting grass discharge port to the rear upper direction of the cutting blade housing. A detachable duct upper part constituting the upper part of the cut grass discharge duct.

  According to the configuration of the third aspect of the invention, in the case of a discharge operation, a cut grass discharge duct is constituted by the lower duct structure permanently installed in the cutting blade housing and the removable duct upper structure, and the discharge of the cut grass discharge duct is performed. The cut grass from the cut grass discharge port is discharged to the rear upward direction of the cutting blade housing by the guide. In the case of mulching work, only the duct upper structure of the duct lower structure and the duct upper structure is removed, thereby opening the upper part of the cut grass discharge port and easily opening the lid to the cut grass discharge port from above. It can be attached to.

  Therefore, in the case of a discharge operation, the cut grass is discharged upward and rearward of the cutting blade housing by the discharge guide of the cut grass discharge duct. The lid can be easily attached from above the discharge port.

According to the fourth aspect of the present invention, a pair of cutting blades adjacent to the cutting blade housing are provided in the cutting blade housing, wherein cutting blades that can be driven and rotated around the vertical axis of the cutting blade housing are arranged side by side in the horizontal direction of the cutting blade housing. A lid used for a mowing apparatus provided with a cut grass discharge port disposed above a portion where the chambers communicate with each other,
A lid body that opens and closes the cut grass outlet;
A detachable connecting portion for connecting to the cutting blade housing so that the lid body is supported by the cutting blade housing in a state where the cutting grass discharge port is closed;
A rear baffle forming a rear side wall of the pair of adjacent mowing chambers located on the rear side of the cutting blade that mows the pair of adjacent mowing chambers with the lid body closing the cut grass discharge port. A plate is provided on the lid body.

According to the configuration of the fourth aspect of the present invention, when the cutting portion is connected to the cutting blade housing by the connecting portion, the rear baffle plate is located on the rear side of the pair of adjacent cutting blades to form the rear side walls of the pair of cutting chambers. The cut grass is easily carried around by the cutting blade in the room, and the cut grass is easily shredded. Then, the lid body closes the cut grass discharge port, and the cut grass is discharged from the cutting chamber to the ground without being discharged from the cut grass discharge port.
On the other hand, when the connection to the cutting housing is released by the connecting portion and is removed from the cutting blade housing, the rear baffle plate is detached from the rear side of the pair of cutting blades, and the rear side walls of the pair of cutting chambers disappear, and the pair of cutting blades are removed. Any cut grass in the room will easily flow to the cut grass outlet. Then, the cut grass discharge port is opened, and the cut grass discharge port discharges the cut grass from each cutting room.

  Therefore, by connecting to the cutting blade housing, the mowing device can perform mulching work and the cutting grass can be shredded accurately, and by removing from the cutting blade housing, the mowing device can be discharged. The cut grass can be discharged smoothly from the cut grass discharge port.

  In the fifth invention, the lid body is located between the adjacent pair of cutting chambers with the lid body closing the cut grass discharge port, and partitions the adjacent pair of cutting chambers. In preparation.

  According to the fifth aspect of the present invention, when the cutting grass outlet is closed by connecting to the cutting blade housing and the rear side walls of the pair of cutting chambers are formed, the partition walls are positioned between the pair of adjacent cutting chambers. A pair of mowing chambers are partitioned, and the mowing grass is moved more favorably by the mowing blades in each mowing chamber, so that the mowing grass is more easily shredded.

  Therefore, when the mowing apparatus is connected to the cutting blade housing and the mowing apparatus performs the mulching work, the cutting of the mowing grass can be performed with higher accuracy.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall side view of a riding mower equipped with a mowing apparatus 20 according to an embodiment of the present invention. As shown in this figure, the riding mower is configured to be self-propelled by a pair of left and right front wheels 1, 1 and a pair of left and right driveable rear wheels 2, 2. Implementation of the present invention connected via a link mechanism 10 between a passenger-type self-propelled vehicle having a driving unit equipped with a driver seat 3 provided at the rear, and front and rear wheels of a body frame 4 of the self-propelled vehicle The grass cutting device 20 according to the example and a grass cutting device 30 having a grass collecting container 32 connected to the rear portion of the vehicle body frame 4 via a support frame 31 are provided.

This work vehicle performs mowing work for cutting grass and grass.
That is, the self-propelled vehicle includes an engine 5 provided at the front portion of the vehicle body frame 4 and a power take-off mechanism 40 provided below the engine 5. The power take-out mechanism 40 inputs the output of the engine 5 to the input shaft 41 via the transmission belt 42 and transmits the driving force of the input shaft 41 to the power take-out shaft 43 via the hydraulically operated work clutch 45. Then, the driving force of the power take-out shaft 43 is transmitted to the cutting blade driving mechanism 22 of the mowing device 20 through the rotating shaft 46.

  The link mechanism 10 includes a pair of left and right front swing links 11, 11 supported on the vehicle body frame 4 so as to swing up and down, and a pair of left and right rear swing links 12 supported on the vehicle body frame 4 so as to swing up and down. , 12 and a pair of left and right interlocking links 13, 13.

  The front ends of the pair of left and right front swing links 11, 11 are connected to a front connecting member 23 located at the front portion of the cutting blade housing 21 of the mowing device 20. The front ends of the pair of left and right rear swing links 12, 12 are connected to a rear connection member 24 located at the rear of the cutting blade housing 21. The left interlocking link 13 interlocks the left front swing link 11 and the rear swing link 12, and the right interlock link 13 includes the right front swing link 11 and the rear swing link 13. Are linked. A lift cylinder 15 is linked to one of the pair of left and right front swing links 11, 11.

  In other words, when one of the front swing links 11 is swung by the lift cylinder 15, the link mechanism 10 is integrated with the pair of left and right front swing links 11, 11 for interlocking with the rotation support shaft 14. When the grounding gauge wheel 25 is swung up and down with respect to the vehicle body frame 4 and supported by the front and rear sides of the cutting blade housing 21, the grounding gauge wheel 25 is grounded to the ground. The gauge wheel 25 is moved up and down to a non-working state where the gauge wheel 25 is lifted from the ground.

  When the self-propelled vehicle is driven with the mowing device 20 in the descending work state, the mowing device 20 cuts the two cutting blades 26 positioned in the horizontal direction of the cutting blade housing inside the cutting blade housing 21. The blade driving mechanism 22 is driven to rotate about the vertical axis of the cutting blade housing by the blade driving mechanism 22 to cut the grass by the cutting blades 26. The cutting grass is moved to the upper portion of the cutting blade housing 21 by the wind generated by the rotation of the cutting blade 26. It discharges from the cut grass discharge duct 27 located in the rear upward direction of the vehicle body.

  The cut grass discharged from the cut grass discharge duct 27 is transported by the wind from the cut blade 26 and the self-propelled vehicle is provided between the left and right rear wheels 2 and 2 in the longitudinal direction of the vehicle body. It is sent to the grass collection container 32 by a guiding action by a certain transport duct 6 and is collected and stored by the grass collection container 32.

  The mowing grass collecting device 30 swings the link mechanism 33 that connects the support frame 31 and the grass collection container 32 up and down with respect to the support frame 31 by the lifting cylinder 34, thereby lowering the grass collection container 32. Move up and down to the grass position and the raised discharge position.

  Next, the mowing apparatus 20 will be described in detail.

  As shown in FIGS. 2, 3, and 4, the cutting blade housing 21 has a cutting blade housing lateral direction inside the cutting blade housing 21 by means of a top plate 21a and a side plate 21b connected to the peripheral edge of the top plate 21a. A pair of mowing chambers 28, 28 formed side by side, and a cut grass discharge port 29 formed by providing a notch hole in the top plate 21a.

  The pair of mowing chambers 28, 28 open toward the ground at the lower end side of the cutting blade housing 21, and are adjacent to each other and communicate with each other at a position located at the central portion in the horizontal width direction of the cutting blade housing 21. Yes. The cut grass discharge port 29 is located above a portion where the pair of mowing chambers 28 and 28 are adjacent to each other and communicates with each mowing chamber 28.

  The two cutting blades 26 and 26 are provided so as to be positioned one by one in each cutting chamber 28. Each of the cutting blades 26 is supported by a rotary support shaft 26a penetrating the top plate 21a of the cutting blade housing 21 so as to be integrally rotatable, and the cutting blade is driven around the vertical axis of the cutting blade housing provided in the rotary support shaft 26a. The mechanism 22 is rotationally driven.

  The cutting blade driving mechanism 22 transmits the driving force of the input shaft 22a interlocked with the rotating shaft 46 to the rotating support shafts 26a using the bevel gear 22b and the spur gear 22c.

  As shown in FIGS. 2, 3, and 4, the cut grass discharge duct 27 includes a duct lower structure 50 provided by attaching sheet metal to the cut blade housing 21 on both sides of the cut grass discharge port 29 and the cut blade housing 21. A duct upper structure 52 in which a connection portion 52a is connected to a pair of left and right support portions 21c, 21c provided at the front end portion of the cutting blade housing 21 via a pivot pin 51 is provided. The pair of left and right duct lower structural members 50, 50 includes a rear guide plate 53 that is connected across lower portions on the rear end side of both duct lower structural members 50, 50.

  FIG. 5 is a perspective view of the duct upper structure 52. As shown in the figure, the duct upper structure 52 includes a pair of left and right side plates 52b and 52b, and a top plate 52c connected to the upper ends of the pair of left and right side plates 52b and 52b.

  That is, in the cut grass discharge duct 27, the pair of left and right duct lower structures 50, 50 constitute the lower part of the left or right lateral plate of the cut grass discharge duct 27, and the duct upper structure 52 discharges the cut grass. Upper portions of the left and right lateral plates of the duct 27 and a top plate are configured, and the cut grass from the cut grass discharge port 29 is directed rearward and upward of the cutting blade housing 21 by the duct lower structure 50 and the duct upper structure 52. The fluid is guided and supplied to the transport duct 6.

The duct upper structure 52 swings up and down with respect to the cutting blade housing 21 around a lifting and lowering shaft centering laterally of the cutting blade housing formed by the shaft cores of the pair of left and right pivot pins 51 and 51. The cutting blade housing 21 includes a rod-shaped spring holder 55 erected on the top plate 21 a on both sides of the duct upper structure 52, and a lifting operation spring 56 formed of a coil spring supported by each spring holder 55. ing. Each of the lifting operation springs 56 is configured to be slidably fitted to the spring holder 55 so as to act on a spring receiving body 57 (see FIG. 5) provided on the lateral side plate 52b of the duct upper structure 52. The upper structural body 52 is lifted and biased around the axis of the pivot pin 51.
That is, the cut grass discharge duct 27 is lifted by the lifting operation spring 56 of the duct upper component 52 regardless of the change in the vertical distance between the cutting blade housing 21 and the transport duct 6 due to the lifting and lowering of the grass cutting device 20 with respect to the self-running vehicle body. Due to the force, the rear end side of the duct upper structure 52 is maintained in contact with the inner surface of the transport duct 6, and the cut grass from the cut grass discharge port 29 leaks from between the cut grass discharge duct 27 and the transport duct 6. It supplies to the conveyance duct 6 so that it may not exist.

  The duct upper structure 52 operates to detach / attach the pair of left and right pivot pins 51, 51 with respect to the support portion 21 c, and to engage / disengage the pair of left and right spring receivers 57 with respect to the spring holder 55. Thus, the cutting blade housing 21 can be attached to or removed from the cutting blade housing 21.

  The mowing apparatus 20 includes the lid 60 shown in FIG. 6 in a state in which it is configured as a separate component from the mowing blade housing 21 and the mowing grass discharge duct 27. As shown in the figure, the lid body 60 includes a lid body 61 that is rectangular in a vertical view of the lid body, and a pair of left and right plates that project from the front end of the lid body 61 to the surface side of the lid body 61. A pair of left and right connecting portions 62, 62 provided by integrally molding the body, and a rear baffle plate 63 provided by attaching a bent sheet metal to the back side of the rear end portion of the lid body 61 are provided.

  The pair of left and right connecting portions 62, 62 can be attached to and detached from the pair of left and right support portions 21c, 21c of the cutting blade housing 21 by the pivot pin 51 instead of the connecting portion 52a of the duct upper structure 52.

  As shown in FIGS. 7 and 8, the lid body 60 connects the pair of left and right connecting portions 62 and 62 to the support portion 21 c of the cutting blade housing 21 by the pivot pin 51, and A connecting bolt is attached to the connecting hole 61a provided on the end side and the support body 65 connected to the pair of left and right duct lower structure bodies 50, 50, and the rear end side of the lid body 50 is connected to the guide lower structure body 50. When it is supported, it will be in use. The lid 60 that is in the use-attached state closes the cut grass discharge port 29 of the cutting blade housing 21 by the lid body 61.

When the lid 60 is in a use-attached state, the rear baffle plate 63 is positioned on the rear side of the pair of cutting blades 26, 26, and the rear baffle plate 63 causes the rear portion of the pair of cutting chambers 28, 28 to be located behind. A rear side wall 28 a is formed at a portion desired for the cut grass discharge port 29.
That is, the rear side wall 28a of one mowing chamber 28 is formed by one end side 63a of the rear baffle plate 63, and the rear side wall 28a of the other mowing chamber 28 is formed by the other end side 63b of the rear baffle plate 63.

FIG. 7 is a side view of the mowing apparatus 20 in a mulching work state. FIG. 8 is a plan view of the mowing apparatus 20 in a mulching work state. As shown in these drawings, the mowing apparatus 20 is in a mulching work state by connecting the lid body 60 in place of the duct upper structure 52.
That is, when the lid body 60 is connected, a rear side wall 28a is formed by the rear baffle plate 63 of the lid body 60 at the rear part of the pair of mowing chambers 28, 28. The cutting by the cutting blade 26 of the cut grass is performed with high accuracy. The cut grass discharge port 29 of the cutting blade housing 21 is closed by the lid body 61 so that the cut grass in each cutting chamber 28 is not discharged from the cut grass discharge port 29, and the cut grass cut in each cutting chamber 28 is cut. It is dropped and discharged from the bottom of the chamber 28 to the ground.

FIG. 2 is a plan view of the mowing device 20 in the discharge work state. FIG. 3 is a side view of the mowing device 20 in the discharge operation state. As shown in these drawings, the mowing apparatus 20 enters a discharge work state by connecting the duct upper structure 52 in place of the lid 60.
That is, when the duct upper structure 52 is connected, the rear side wall 28 a is not formed at the rear part of the pair of cutting chambers 28, 28, and the cutting grass in each cutting chamber 28 easily flows to the cutting grass discharge port 29. The cut grass discharge port 29 is opened, the cut grass in each cutting chamber 28 is discharged from the cut grass discharge port 29, and the cut grass discharged from the cut grass discharge port 29 is flow-guided by the cut grass discharge duct 27 and the cutting blade It is discharged rearward and upward of the housing 21.

  FIG. 9 is a perspective view of a lid 60 having another embodiment structure. As shown in this figure, when the lid 60 provided with another embodiment structure and the lid body 60 provided with the embodiment structure shown in FIG. 6 are compared, a point of being detachably connected to the cutting blade housing 21 and a pair The lid 60 provided with another embodiment structure in that the rear side wall 28a is formed at the rear of the mowing chambers 28, 28 and the cut grass discharge port 29 of the cutting blade housing 21 is closed, as shown in FIG. The lid 60 having the implementation structure has the same configuration. The lid body 60 provided with another implementation structure is different from the lid body 60 provided with the implementation structure shown in FIG. 6 in that a partition wall 64 provided on the back side of the lid body 61 is provided.

  FIG. 10 is a side view showing a state in which the lid 60 of another embodiment structure of the mowing apparatus 20 is attached. FIG. 11 is a plan view of a state in which a cover 60 of another embodiment structure of the mowing apparatus 20 is attached. As shown in these drawings, the partition wall 62 is formed between the adjacent pair of cutting chambers 28 and 28 in a state where the lid 60 is connected to the cutting blade housing 21 and the cut grass discharge port 29 is closed. The pair of mowing chambers 28, 28 are positioned so as to make it easier to carry the cut grass by the mowing blade 26 in each mowing chamber 28.

Overall side view of riding mower Top view of the mowing device in the discharge work state Side view of the mowing device in the discharge work state Top view showing the cut grass outlet of the mowing device Perspective view of duct upper structure Perspective view of lid Side view of the mowing device in the mulching work state Top view of the mowing device in the mulching work state The perspective view of the cover body provided with another implementation structure Side view of a state in which the lid of another embodiment of the mowing device is attached Plan view of a state in which the lid of another embodiment of the mowing apparatus is attached

Explanation of symbols

21 Mowing blade housing 26 Mowing blade 27 Mowing grass discharge duct 28 Mowing chamber 28a Rear wall 29 of the mowing chamber Cutting grass discharge port 50 Duct lower structure 52 Duct upper structure 60 Lid 61 Lid body 62 Connecting part 63 Rear baffle plate 64 partition wall

Claims (5)

A cutting blade that can be driven and rotated around the vertical axis of the cutting blade housing is arranged in the horizontal direction in the cutting blade housing, and a pair of cutting chambers adjacent to the cutting blade housing communicate with each other. A mowing apparatus provided with a cut grass outlet provided above the part,
A lid that opens and closes the cut grass outlet;
A rear baffle plate that is located on the rear side of a cutting blade that cuts grass in the pair of adjacent mowing chambers with the lid closing the cut grass discharge port and forms a rear wall of the pair of adjacent mowing chambers A mowing apparatus provided on the lid.   2. The partition includes a partition wall that is positioned between the pair of adjacent mowing chambers with the lid closing the cut grass discharge port and that partitions the pair of adjacent mowing chambers. The mowing apparatus described. The lid is detachably provided,
By connecting to the cutting blade housing, a duct lower structure attached to the cutting blade housing so as to form a lower portion of a cutting grass discharge duct extending from the cutting grass discharge port to the rear upper direction of the cutting blade housing. The mowing apparatus according to claim 1 or 2, further comprising a detachable duct upper part constituting an upper part of the cut grass discharge duct. A cutting blade that can be driven and rotated around the vertical axis of the cutting blade housing is arranged in the horizontal direction in the cutting blade housing, and a pair of cutting chambers adjacent to the cutting blade housing communicate with each other. A lid used for a mowing apparatus provided with a cut grass discharge port disposed above the site,
A lid body that opens and closes the cut grass outlet;
A detachable connecting portion for connecting to the cutting blade housing so that the lid body is supported by the cutting blade housing in a state where the cutting grass discharge port is closed;
A rear baffle forming a rear side wall of the pair of adjacent mowing chambers located on the rear side of the cutting blade that mows the pair of adjacent mowing chambers with the lid body closing the cut grass discharge port. A lid provided with a plate on the lid body.   The lid body is provided with a partition wall that is located between the pair of adjacent mowing chambers with the lid body closing the cut grass discharge port and partitions the pair of adjacent mowing chambers. 4. The lid according to 4.

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