JP2003116317A - Mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mower having lower heights of a body and a blade device attached thereto to facilitate an mowing operation under a fruit tree because the movement of an operator operating the mower, and an operating handle part, into the lower part of the low tree is difficult in the mowing operation under the low tree, and to enable the blade device to follow the inclination and uneven change of the reaping ground. SOLUTION: The structure of the mower comprises an upper and lower pair of parallel links 5 composed of an upper link 3 and a lower link 4 installed in the front side of a traveling vehicle body 2 having a crawler traveling device 1 so as to protrude forward and so as to be freely lifted and lowered, and the blade device 7 having an auxiliary wheel 6 at the front end of the parallel links 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mower which is convenient for cutting grass under a low tree such as an orchard.

[0002]

2. Description of the Related Art A mowing frame having a cutting blade device on the front side and a steering handle on the rear side is supported on a vehicle body having a crawler traveling device so as to be vertically rotatable, and is mowed while operating the steering handle. A technique for operating a blade device up and down to perform a mowing operation is described in Japanese Patent Laid-Open No. 9-98634.

[0003]

In mowing work under low trees such as in an orchard, it is difficult for the operator of the reaper and the steering handle to go under the conventional techniques as described above, and the cutting ground also changes in inclination or unevenness. It is easy to be restricted by mowing work conditions.

[0004]

According to a first aspect of the present invention, there is provided a front side of a traveling vehicle body 2 having a crawler traveling device 1,
A pair of upper and lower parallel links 5 composed of an upper link 3 and a lower link 4 are provided so as to project forward and can be raised and lowered, and a cutting blade device 7 having an auxiliary wheel 6 is provided at the front end of the parallel link 5. The configuration of the mower to be used. The traveling vehicle body 2 is driven by the drive of the crawler traveling device 1, and a cutting blade device 7 connected to the front of the traveling crawler traveling device 1 is lowered to the lower side of the branches and leaves of the fruit tree through a parallel link 5 to cut grass around the bottom of the tree. To do. At this time, the cutting blade device 7 can be raised and lowered in a substantially parallel manner with respect to the vehicle body 2 via the parallel link 5. Therefore, even if the traveling device 1 is largely tilted forward and backward, the auxiliary wheels 6 contact the cutting ground. Keep the cutting height approximately constant. Further, the cutting angle of the cutting blade device 7 with respect to the cutting ground is kept substantially constant. The invention as set forth in claim 2 is characterized in that the parallel link 5 is provided with an elevating lever 8 projecting rearward and capable of elevating. To operate the reaper, operate the steering handle of the traveling vehicle body 2 and operate the raising / lowering lever 8 protruding rearward of the parallel link 5 to rotate the front cutting blade device 7 together with the parallel link 5. Move up and down. The invention according to claim 3 is characterized in that the cutting blade device 7 is transmitted from the engine 9 on the vehicle body 2 via the transmission mechanism 11 on the link support shaft 10 at the rear portion of the parallel link 5. is there. Engine 9
Drive the traveling device 1 and also the cutting blade device 7 to perform the cutting action. The transmission of the cutting blade device 7 is performed via the transmission mechanism 11 around the link support shaft 10 at the rear end of the parallel link 5, and the raising and lowering of the cutting device 7 is performed by the rotation around the link support shaft 10. .

[0005]

According to the invention described in claim 1, since the traveling device 1 is a crawler type, the ground clearance of the vehicle body 2 can be lowered, and the cutting blade device 7 on the front side is extended forward by the parallel link 5. Since it is projected and supported low, it is possible to lengthen the distance from the operation position by the steering handle of the traveling vehicle body 2 at the rear part to deepen the diving under the fruit tree and facilitate the mowing operation. Further, since the crawler traveling device 1 and the traveling vehicle body 2 are integrally formed, the maneuverability is easy, and the cutting blade device 7 in front of the vehicle body 2 in a fixed posture is parallel to the vehicle body 2 through the parallel link 5. Raises and lowers and can be raised and lowered freely according to the uneven surface or inclined surface of the mowing ground, maintaining a constant cutting height,
Even if the height with respect to the traveling device 1 changes, the change in the angle of the cutting blade rotation surface with respect to the cutting ground can be reduced, and stable cutting can be performed. In the invention according to claim 2, the cutting blade device 7 is attached to the front end of the parallel link 5 to maintain a constant cutting height while moving up and down along the uneven surface of the cutting ground by cutting running, When the blade device 7 is raised and lowered greatly, the raising and lowering lever 8 is pivoted around the link support shaft 10 near the control portion of the vehicle body 2 to easily raise and lower the cutting blade device 7 via the parallel link 5. it can.
Further, since the elevating lever 8 is provided on the parallel link 5, the structure can be simplified. In the invention according to claim 3, as the lifting link support shaft 10 of the parallel link 5 for moving up and down the cutting blade device 7 and the transmission support shaft of the partial transmission mechanism 11 for transmitting the cutting blade device 7,
Even if the cutting blade device 7 is moved up and down, the relative position of the transmission device from the transmission mechanism 11 to the cutting blade device 7 is not significantly changed, and smooth transmission can be performed, and the transmission mechanism 11 and the parallel link 5 are lowered. It is possible to set it so that it does not interfere with cutting under the fruit tree.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. The walking type traveling vehicle body 2 in which the cutting blade device 7 is mounted on the front side has the traveling device 1 including the crawlers 12 on both left and right sides, the engine 9 is mounted on the upper part thereof, and the handle frame 13 is projected on the upper rear part. A pair of left and right steering handles 14 are integrally formed at the rear end of the steering handle 14 and each has a steering clutch lever 15. The crawler 12 has a structure in which the front and rear ends are wound around the wheels 16 and 17 and the drive sprocket 18, and the drive sprocket 18 is transmitted from the engine 9 via an interlocking transmission device so that the crawler 12 can be driven. Reference numeral 45 denotes a traveling clutch lever, which allows a belt 46 for driving the traveling device and a tension pulley 47 to be turned on and off. Reference numeral 19 denotes a side cover that covers the outside of the engine 9 and the transmission unit of the vehicle body 2. 20 is a clutch lever,
Belt 21 of cutting blade device 7 Tension clutch pulley 22
Can be turned on and off. In the front side portion of the vehicle body 2, link pillars 23 having a forward upward slope are provided on both left and right sides at the lowest possible position, and a pair of upper and lower parallel links 5 are provided on the link pillar 23. Of these, the upper link 3 on the upper side is vertically rotatably connected by a lateral link support shaft 10, and a rotatable pulley shaft 24 is supported at the center of the link support shaft 10 on one side, so that the transmission mechanism 11 Form part of. The belt 21 is wound between the pulley 25 at the inner end of the pulley shaft 24 and the engine pulley 26.
Further, a belt 29 between the pulley 27 at the outer end of the pulley shaft 24 and the input pulley 28 on the cutting blade device 7 side is hung, and the belt 29 is tensioned by a tension pulley 49 and a spring 48. Always energized. The lower link 4 is connected by a link support shaft 30 so as to be vertically rotatable.

The cutting blade device 7 connected to the front side of the parallel links 5 has a transmission case 31 on the upper side, and vertical cutting blade shafts 32 are axially mounted on both left and right sides of the transmission case 31.
Upper and lower two-stage cutting blades 33, 34 are arranged in the. A cutting blade cover 35 is provided to cover the upper rotating portions of the cutting blades 33 and 34. A grass collecting guide 36 for guiding the grass to be mowed to the center side is provided on the upper front side of the cutting blade cover 35, and a caster bracket 37 is rotatably provided on the lower side of the center part to allow the rotatable auxiliary wheel 6 to rotate. Wear 38. The cutting blade cover 35 has side covers 39 of appropriate heights formed on both right and left sides, and the front and rear directions are opened 40 and 41 so that the cut grass can be guided between the left and right crawlers 12 and discharged. The input pulley 28 of the input shaft 42 is provided on one side of the transmission case 31, and the left and right cutting blade shafts 32 are rotatably transmitted in the same direction or in opposite directions by the rotation of the input shaft 42 to perform a mowing action. Can be done. The front ends of the upper link 3 and the lower link 4 are connected to the rear side of the transmission case 31 by the horizontal link support shafts 43 and 44 so as to be vertically rotatable. The upper link 3 and the lower link 4 are substantially parallel to each other, and the mowing action angle of the traveling device 1 with respect to the traveling ground or the mowing ground when the cutting blade device 7 is vertically moved is maintained substantially constant.

Although the cutting blade device 7 is lowered by its own weight so that the auxiliary wheel 6 is grounded, a part of the parallel link 5 is elastically urged against the vehicle body 2 by a spring or the like to be lowered. Alternatively, it can be urged to move up and down.
The auxiliary wheel 6 supports the cutting blade device 7, and the cutting height can be changed by vertically adjusting the cutting wheel device 7. In order to move the cutting blade device 7 up and down, a lift cylinder that is expanded and contracted by a geared motor or the like is provided between the parallel link 5 and the vehicle body 2 and is expanded and contracted by a switch operation provided near the control handle 14 so that the cutting posture and It is also possible to adopt a configuration in which it is moved up and down in a mowing position. The elevating lever 8 is integrally protruded to the rear part of the upper link 3 so that the rear end is located near the steering handle 14. While operating the control handle 14, the operator operates the elevating lever 8 to rotate the upper link 3 up and down around the link support shaft 10 to raise the cutting blade device 7 to the non-mowing position, Can be lowered to the mowing position. In this case, in the vehicle body 2, the traveling device 1 in the form of a crawler and the steering handle 14
Since the and are integrated, the cutting blade device 7 can be easily moved up and down with respect to the vehicle body 2, and the operation can be accurately performed.

The vehicle body 2 has a crawler 12 and the engine 9 is mounted as close to the rear steering handle 14 portion as possible. The upper surface of the vehicle body 2 in front of the steering handle 14 serves as an upper end portion of the steering handle 14. By forming it lower than the slope D connecting the upper end of the cutting blade device 7 and widening the forward field of view, it becomes easy to dive under the branches and leaves C around the tree B of the orchard A, and Tree B Base A
Make it easier to mow. At this time, the steering wheel 14
Since the front-rear distance between the cutting blade device 7 and the cutting blade device 7 is long, the operator brings the steering handle 14 part closer to the outer periphery around the tree B and causes the cutting blade device 7 part to enter as deeply as possible to perform the cutting action. . In addition, mowing with this mowing machine can be performed outside the orchard. In particular, in a mowing operation on a soft land such as a wetland, the traveling device 1 having the crawler 12 can reduce the sinking of the vehicle body 2 to improve workability. Alternatively, a stand-up step or a seat may be provided at the rear of the vehicle body to carry out the boarding work.

[Brief description of drawings]

FIG. 1 is a side view of a mower.

FIG. 2 is a side view showing a part of the operating state thereof.

FIG. 3 is a plan view thereof.

FIG. 4 is a partial plan sectional view.

[Explanation of symbols]

1 traveling device 2 car body 3 upper links 4 Lower link 5 parallel links 6 auxiliary wheels 7 Cutting blade device 8 Lifting lever 9 engine 10 link spindle 11 Transmission mechanism 12 crawlers 13 handle frame 14 Steering handle

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) A01D 34/74 A01D 34/74

Claims (3)

[Claims] 1. A pair of upper and lower parallel links (5) consisting of an upper link (3) and a lower link (4) are projected forward on the front side of a traveling vehicle body (2) having a crawler traveling device 1 and can be raised and lowered. And a cutting blade device (7) having an auxiliary wheel (6) at the front end of the parallel link (5). 2. The mowing machine according to claim 1, wherein the parallel link (5) is provided with an elevating lever (8) projecting rearward and capable of elevating. 3. The transmission of the cutting blade device (7) is carried out by a vehicle body (2).
3. Mower according to claim 1 or 2, characterized in that it is carried out from the upper engine (9) via a transmission mechanism (11) on the link support shaft (10) at the rear of the parallel link (5).