JPH11275922A - Mowing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mowing apparatus capable of especially increasing transportation force near both ends in the reaping width direction of a reel knife and improving the transportation force of reaped grass on the whole, by simple remodeling. SOLUTION: A rotary revolving shaft is installed in a cutter case equipped with a reaped lawn grass outlet K. A reel knife which is spirally formed in the direction of the center of the rotary revolving shaft around the center of the shaft is connected to the rotary revolving shaft so as to constitute a reel mower 6B. Blade bodies 61 and 62 for producing transporting air for sending reaped lawn grass to the reaped lawn grass outlet K are installed at end parts in the reaping width direction of the reel mower 6B so as to be rotatable integrally with the reel blade.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mowing device comprising a reel mower.

[0002]

2. Description of the Related Art Conventionally, in this type of mowing apparatus, a reel blade in a reel mower is formed torsionally, and a rotary drive shaft for rotating the reel blade is provided in a cutting width direction of the reel blade. It is known that a plurality of disk-shaped disks are arranged side by side, and a reel blade is erected and fixed around the outer periphery of the disks. In the mowing device having the conventional structure described above, the cut grass cut by the reel blade and the fixed blade fixed to the cutter case side is discharged from the cut grass discharge port of the cutter case with the rotation of the reel blade. In this case, the wind is generated by the bouncing of the reel blades caused by the cut grass or the wind generated by the reel blades themselves, and the wind power is used to obtain the transport force.

[0003]

However, in such a conventional mowing device, for example, when mowing grass that is wet with rain and then discharging it from the cutter case, the weight of the mowing grass is relatively large. By having become
There is a high possibility that mowing grass will stay on the way because sufficient wind power cannot be obtained and the bouncing distance will be short.
This may cause clogging. In addition, a suction type blower connected to a discharge port of a cutter case to obtain auxiliary wind power for cutting grass is conventionally known, but a cross-sectional area of a path for transferring grass in the cutter case is large. Therefore, the wind speed of the suction air tends to decrease, especially near the both ends in the cutting width direction of the reel blade. Had become desirable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and by a simple modification, the transport force near the both ends in the cutting width direction of the reel blade is particularly increased, so that the transport force of the cut grass as a whole is improved. It is an object to provide a mowing device that can be enhanced.

[0005]

According to a first aspect of the present invention, there is provided a mowing apparatus comprising: a rotary drive shaft provided in a cutter case having a cut grass discharge port; A reel mower is formed by connecting a reel blade twisted around the axis along the shaft so as to rotate integrally with the rotary drive shaft, and the lawn mower is formed at an end portion of the reel mower in the cutting width direction. A blade for generating a conveying wind to be sent to the cut grass discharge port is provided so as to be integrally rotatable with the reel blade.

(Operation) According to the configuration of the first aspect of the present invention, the wind generated by the blade body forcibly sends the cut grass at the end portion in the cut width direction to the cut grass discharge port. Therefore, in addition to the action of blowing the wind by the reel blade and releasing the cut grass by the bouncing action, the cut grass is easily released from the cut grass discharge port of the cutter case.

(Effects) Therefore, according to the configuration of the first aspect of the present invention, even if the cut grass tends to get wet and become heavy due to the rain and dew, the wind force generated by the wings increases the transported wind force, so that the clogging occurs. In such a state that stagnation that may occur may be suppressed, the cut grass can be smoothly discharged from the cutter case.

(Structure) According to a second aspect of the present invention, in the mowing apparatus according to the first aspect, a plurality of disks are provided on the rotary drive shaft at predetermined intervals along an axial direction of the rotary drive shaft. In parallel, the reel blades are installed over the outer peripheral edge of each of the disks, and the blades are installed and mounted between a pair of disks located at end portions of the disks in the cutting width direction. This is a characteristic configuration.

(Operation) According to the structure of the second aspect of the present invention, since the blades are mounted between the pair of disks, the supporting strength is higher than that of the case where the blades are provided in a cantilever shape. The blade body can be provided in a high state, and the mounting of the blade body is relatively easy.

(Effects) Therefore, according to the configuration of the second aspect of the present invention, for example, the rotary drive shaft is provided with a blade body, or the reel blade is provided with a blade body so as to be cantilevered. In comparison, since the supporting strength of the blade body can be increased, there is an advantage that the durability is high and maintenance such as replacement of the blade body can be easily performed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a riding lawn mower equipped with a lawn mowing device as an example of a mowing device. This riding lawn mower is mounted on an engine hood 3 at the rear of a traveling body having a driving type front wheel 1, 1 and a driving type rear wheel 2, 2 to be steered. And a grass container 5 is disposed above the engine bonnet 3, and a lawn mowing device M including three reel mowers 6A, 6B, 6C is provided at the front end position of the traveling body so as to be able to move up and down.
The cut grass from A, 6B, and 6C is sent to the grass collecting container 5 through the duct 7 and the suction blower 8.

A step 11 is formed at the front position of the traveling body to open forward and to both sides, and a control tower 12 is provided at the front position of the step 11, and a steering tower is provided at an upper end position of the control tower 12. A handle 13 is provided, a driver seat 14 is provided at the rear position of the step 11, and a loop-shaped protection frame 15 for protecting an upper portion and a side portion around the driver seat 14 is provided. As shown in FIG. 5, the three reel mowers 6A, 6B, and 6C are provided with a first reel mower 6A arranged at a center position in the left-right direction with respect to the traveling machine body, and a slightly rearward side of the first reel mower 6A. A second reel mower 6B and a third reel mower 6C are respectively disposed at the left and right lateral side positions. Each of the left and right ends of the cutting width of the first reel mower 6A, the right end of the second reel mower 6B and The third reel mower 6C is disposed so as to overlap with the left end of the third reel mower 6C in a small width range.

Each of the ducts 7 has three first ducts 7a, 7a, 7a, 7a, 7a, 7a, 7a, 7a, 7c, which are adapted to send cut grass as cut grass from the first, second, and third reel mowers 6A, 6B, 6C, respectively.
7a, a merging member 7b for merging the three first ducts 7a, 7a, 7a at a position in front of the fuselage, and a merging member 7
and a second duct 7c for sending the cut grass merged at b. The second duct 7c is arranged from the front of the body to the right side of the body, and the suction blower 8 is interposed at an intermediate position of the second duct 7c on the side of the traveling body.

The cut grass fed upward from the suction blower 8 via the second duct 7c is sent to the receiving cylinder 16 of the grass collecting container 5 via an opening formed in the upper end of the second duct 7c in an oblique attitude. It has become something. The joining member 7b
A metal member formed by forming a tubular portion connected to the first duct 7a so as to open forward and left and right, and opening a tubular portion connected to the second duct 7c upward, The merging member 7b is supported at a position in front of a center position of the traveling body in the left-right direction via a column 17 in a fixed state.

As shown in FIG. 1, the grass collecting container 5 has a container body 5 having an opening which is opened rearward in the posture shown in FIG.
a and a lid 5b which is attached to be openable and closable via a hinge 19 at the upper edge of the opening. This grass container 5
By connecting the lower end of the bracket 20 provided at the lower position of the opening edge to a stay 22 formed on the support frame 21 at the rear of the traveling body so as to be swingable about a support shaft 23 in a laterally oriented position, The entire grass container 5 can be switched between a grass-collecting posture shown in FIG. The cut grass sent from the receiving cylinder 16 together with the flow of air is dropped into the grass collection container 5 by its own weight due to a decrease in the flow rate of the air inside the grass collection container 5, and is collected. The air is discharged from the upper space inside the grass collecting container 5 to the outside of the container via an exhaust path (not shown) formed on the rear surface side of the lid 5b.

A release cylinder 24 for switching the attitude of the grass container body 5a is provided over the bracket 20 and the support frame 21, and a link member 25 for opening and closing the lid 5b in conjunction with the attitude switch of the grass container body 5a. Is provided over the arm 26 connected to the stay 22 and the lid 5b, so that the grass-collecting container main body 5a is set to the grass-collecting posture by driving the discharge cylinder 24 to the contraction side, as shown in FIG. When the lid 5b is maintained in the closed state and the grass collecting container main body 5a is switched to the discharging posture by driving the discharging cylinder 24 to the extension side, as shown in FIG. 2, the grass collecting container main body 5a is received from the upper end of the second duct 7c. With the tube 16 separated and the lid 5b opened, the grass-collecting container main body 5a can discharge the cut grass with the opening thereof facing downward.

As shown in FIG. 5, the suction blower 8 has a drive shaft 8a in a front-rear posture.
, the power from the engine 4 is transmitted to the belt tension type clutch 28, the transmission shaft 29, the transmission shaft 29 and the drive shaft 8
The transmission is performed via each of the belt transmission mechanisms 30 provided between the first and second belts.

As shown in FIGS. 6 and 7, the base end of the first arm 33, which is in the front-rear direction of the traveling body, is positioned sideways with respect to the center of the front end of the body frame 32 in the left-right direction. The base end of the second arm 34, which is pivotally supported around the axis X and is bent toward the outside of the traveling body toward the front end with respect to the left and right end positions of the front end of the vehicle body frame 32, is in a lateral posture. The first arm 33, the second arm and the third reel mower 6A, 6B, 6C are connected and supported at the front end positions of the first arm 33 and the second arm 34 so as to be swingable around the axis X and the coaxial axis.

That is, as shown in FIGS. 6 and 7, a lift arm 36 driven up and down by a first lift cylinder 35 is provided near the base end of the first arm 33, and the lift arm 36 and the first arm 33 are provided. And a base member of each of the left and right second arms 34, 34, and swings integrally with the respective second arm 34 at the base end of each of the left and right second arms 34, 34 as shown in FIG. And a second lift cylinder 38 for operating the arm 34a. As shown in FIG. 8 and FIG.
A channel-shaped support bracket 39 that opens forward is provided at the distal end position of each of the third and second arms 34 so as to be rotatable about a rolling axis Y in a front-rearward posture, and each reel mower 6A, 6B, 6C
The center position of the upper main frame 40 in the left-right direction is supported rotatably about the yawing axis Z in the vertical direction.

As shown in FIGS. 8 and 9, a yaw axis Z in a side view is given a tilt angle falling backward,
The yaw axis Z is set such that the intersection point P between the yaw axis Z and the ground is closer to the front in the traveling direction than the ground point Q of the front ground roller 49. That is, the trail t is set between the intersection point P and the ground point Q by setting the caster angle in the backward falling state.
By dragging and moving the reel mowers 6A, 6B, 6C with the yaw axis Z serving as a tow point, the tow can be stably towed without wobbling, and the position of the support bracket 39 as the tow point can be minimized. Toward the rear, a compact reel mower support portion in which the support member 52 does not protrude too far is realized.

As shown in FIGS. 1 to 4, at the front end position of the traveling body, a frame member 41 having a shape which is upwardly directed toward the outer end in the left-right direction is provided. Contact rollers 42, 42 made of an elastic material such as are rotatably supported around an axis in a front-rear posture. When the three reel mowers 6A, 6B, 6C are raised, the first lift cylinder 35 and the second lift cylinders 38, 38 are simultaneously driven for extension. At the time of this lift, as shown in FIG. The main frames 40 of the second and third reel mowers 6B and 6C at the left and right positions
The reel rollers 6B, 6C are rotated around the rolling axes Y, Y to switch to an inclined position in which the outer ends of the reel mowers 6B, 6C are turned upward. Has become.

The three reel mowers 6A, 6B, and 6C have the same structure, and the second reel mowers 6A, 6B, and 6C have the second structure.
The structure will be described below with the reel mower 6B as an example.

As shown in FIGS. 8 to 11, the second reel mower 6B has side wall members 45a, 45
a, a case main body 45 as a cutter case including an upper wall member 45b disposed at an upper portion and a rear wall member 45c disposed at a rear portion, and detachably attached to a front position of the case main body 45. The guide member 46 forms a case, and the reel blade body 47 is rotatable around an axis in a laterally oriented posture with respect to the side wall members 45a, 45a.
The fixed blade 48 is disposed close to the outer periphery of the lower side of the reel blade body 47, and a front ground roller 49 and a rear ground roller 50 as a gauge wheel are provided for the front position and the rear position.
And a hydraulic motor 51 for driving the reel blade 47 is provided on one of the side wall members 45a.

Then, the side wall member 4 is formed around the rod 54 penetrating right and left through the front portion of the left and right side wall members 45a.
The main frame 4 is configured such that upper ends of support members 52, 52 extending upward so as to be able to relatively swing with respect to 5a, 45a are connected in a posture parallel to the rotation axis of the reel blade body 47.
0, the first reel mower 6 at the time of work is provided.
A is allowed to pitch around the rod 54 so as to improve the followability with respect to the ground. Further, the first reel mower 6A is raised to a height separated from the ground at the upper positions of the left and right side wall members 45a, 45a. In this case, a stopper 43 is provided which determines the pitching limit of the first reel mower 6A by contact with the support member 52 at the time.

The rear wall member 45c is provided with a swing shaft 5 in a horizontal posture.
It is provided so that it can swing open and close around the circumference of three. The guide member 46 communicates with the inside of the case main body 45 through an opening K as a grass clipper discharge opening which is open at the front part of the case main body 45 at the rear, and opens upward at the front position.
The first duct 7a is formed in the shape of a bag in which a is formed, and is connected to the discharge port 46a. And
As shown in FIG. 10, a window T is provided at the center of the upper surface of the guide member 46 in the left-right direction so that the inside can be viewed through a transparent resin plate. Through this window T, it is possible to check the clogged grass and the like. Discharge port 46a
Is set at the center position in the left-right direction in plan view, and the inclined surface 46 for guiding the taper so as to project forward toward the center in the left-right direction in plan view so as to guide the cut grass to the discharge port 46a.
b, 46b are formed.

At a position below the opening K inside the case main body 45, a rod 54 in a horizontal position is disposed, and at the lower end of the opening edge behind the guide member 46, the rod 54 is disposed.
A pair of left and right buckles are provided on the upper surface of the guide member 46 such that the pair of left and right buckles are detachable from the pair of engagement pieces 56, 56 of the upper wall member 45a. By providing the guide member 4,
6 is configured to be detachable from the case body 45.

As shown in FIGS. 8 and 9, the air inflow path 44 is formed by setting a clearance between the front portions of the left and right side wall members 45a, 45a and the ground with a sufficient space for air intake. doing.

The rotation direction of the reel blade 47 in the second reel mower 6B is set in the direction indicated by the arrow in FIG. 9, that is, such that the outer peripheral ground side moves rearward of the traveling machine body. The cut grass cut by the reel blade 60 and the fixed blade 48 of the blade 47 comes into contact with the reel blade 47 or the blade blade 47 and a blade 61, which will be described later.
Due to the wind pressure accompanying the rotation of 62, the air is sent upward from the case lower position through the case rear position and to the right and left sides. The guide member 46 is fed forward through the guide member 46, guided by the inclined surface 46b of the guide member 46 to the center position in the left-right direction, and then sent upward from the discharge port 46a (see FIG. 11). See dash-double-dot line). After being sent out in this manner, it is sent to the grass collection container 5 via the first duct 7a, the joining member 7b, the suction blower 8, and the receiving cylinder 16, and is collected.

The reel blade 47 is shown in FIGS.
As shown in FIG. 2, in a state of being rotationally driven by the hydraulic motor 51, a circular drive shaft 63 supported between the left and right side wall members 45a, 45a of the case main body 45 is formed in a disk shape along the axial direction. A plurality of (six) disks 64 are integrally connected in a state of being juxtaposed at predetermined intervals, and six torsionally formed reel blades 60 are constructed to span the outer peripheral edge of each disk 64. I have. Further, the blades 61, 62 formed by bending sheet metal are laid between a pair of disks 64, 64 located at both ends of the reel blade 47, and every 120 degrees around the axis of the rotary drive shaft 63. It is connected by bolting in the state where it is arranged. The blade body 61 in FIG. 11 is arranged in parallel with the reel blade 60, and winds in the same direction as the reel blade 60, and extends from the left end of the reel body 47 in the cutting width direction. It sends air to transport the cut grass toward the front center. The disk 64 of the blade body 61,
The flanges 61a, 61a for attachment to the projection 64 project from the same surface. The blade body 62 in FIG. 11 is set on a plane along the axis of the rotation drive shaft 63 in a plan view or a front view so as to intersect with the blade surface of the reel blade 60, and is raised forward. It has become windy. The flanges 62a, 62a for attaching the blade body 62 to the disks 64, 64 are provided on the opposite sides.

[Another Embodiment] As shown in FIG. 13, cut grass as cut grass discharged in a forward and outward direction by the reel blade 47 is directed away from the discharge port 46 a of the guide body 46. A baffle plate member 65 that reflects the cut grass that collides toward the discharge port 46a may be provided at the inclined surface 46b of the guide body 46 that collides. The baffle plate member 65 is also used as a member for restricting the cut grass from protruding from a gap between one side end of the guide body 46 and the opening K of the case body 45.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a riding lawn mower having a reel mower.

FIG. 2 is a side view showing a grass collection container and the like in a discharging position.

FIG. 3 is a partially perspective front view of a riding lawn mower.

FIG. 4 is a front view showing a state where the reel mower is in a retracted position;

FIG. 5 is a schematic plan view showing a reel mower and the like.

FIG. 6 is a side view of a lifting / lowering structure of a first arm.

FIG. 7 is a side view of the lifting structure of the second arm.

FIG. 8 is a side view of a reel mower.

FIG. 9 is a longitudinal sectional side view of a reel mower.

FIG. 10 is a plan view of a reel mower.

FIG. 11 is a cross-sectional plan view of a reel mower.

FIG. 12 is an exploded perspective view showing how a blade and the like are attached to a reel blade.

FIG. 13 is a cross-sectional plan view of a reel mower according to another embodiment.

[Explanation of symbols]

 6A, 6B, 6C Reel mower 45 Cutter case 60 Reel blade 61, 62 Blade body 63 Rotating drive shaft 64 Disk K

 ──────────────────────────────────────────────────の Continued on the front page (72) Yoshihiro Kawahara 64, Ishizukitamachi, Sakai City, Osaka Prefecture Inside Kubota Sakai Factory (72) Koji Fujiwara 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Co., Ltd. In the factory

Claims (2)

[Claims] A rotary drive shaft is installed in a cutter case having a cut grass discharge port, and a reel blade twisted around the axial center of the rotary drive shaft along the axial direction of the rotary drive shaft. The reel mower is connected so as to rotate integrally with the reel mower, and at the end portion of the reel mower in the cutting width direction, a blade body that generates a conveying wind that sends the cut grass to the cut grass discharge port is formed with the reel blade. A mowing device provided so as to be able to rotate integrally. 2. A plurality of disks are juxtaposed on the rotary drive shaft at predetermined intervals along the axial direction of the rotation drive shaft, and the reel blade is laid over the outer peripheral edge of each of the disks. The mowing apparatus according to claim 1, wherein the blade body is mounted and mounted between a pair of disks located at end portions in the cutting width direction.