JP2657901B2 - Mower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding mower suitable for cutting weeds such as undergrowth of an orchard.

[0002]

2. Description of the Related Art In orchards such as apples, it is necessary to frequently cut undergrowth. Conventionally, the riding mower used for such work has a structure equipped with a cutter at the center of the bottom of the vehicle body between the front wheel and the rear wheel.The cutter is rotated by the power of the engine, and the self-propelled lower part of the vehicle body Mowing the grass.

[0003]

According to such a mowing machine, a wide orchard can be freely moved and lightly worked. However, many fruit trees have low branches, and the roots are buried near the roots, so that it is impossible to get the mowing machine close to the roots, and the grass at the roots of the fruit trees cannot be cut.

[0004] It is an object of the present invention to provide a mowing machine capable of cutting down to the root of a fruit tree without leaving any remaining.

[0005]

The mower according to the present invention has a sub cutter on the side of the vehicle body in addition to the main cutter at the bottom of the vehicle body.

[0006] The sub-cutter is attached to a side plate that protrudes up and down to the side of a four-wheeled passenger car body. The side plate has its inner side pivotally attached to the side edge of the bottom plate of the passenger car body, and a pair of support wheels is provided in front and rear of the outer portion so as to be variable in direction. The sub-cutter has a pair of blades mounted on its left and right ends so that it can move back and forth,
Each blade body has a front edge and a rear edge.
The length of the left and right ends of the sub cutter is formed shorter than that of the main cutter.

A sub-pulley for rotating the sub-cutter is formed with a smaller diameter than a main pulley for rotating the main cutter, a transmission belt is stretched between the pulleys, and a pair of tension pulleys for elastically pressing the transmission belt from front and rear are connected to the side plate. And near the pivot of the bottom plate.

[0008]

The power of the engine is transmitted to the main pulley to rotate the main cutter, and the sub-cutter rotates simultaneously via the transmission belt. Here, the length of the left and right ends of the sub cutter is shorter than that of the main cutter, but since the speed of the sub pulley is increased with a smaller diameter than the main pulley, the peripheral speed of the tip of the sub cutter is equal to the peripheral speed of the tip of the main cutter.

[0009] The support wheels roll as the passenger body advances,
The side plate floats up and down with its pivot point as a fulcrum according to the height of the terrain, and keeps the sub cutter at a certain height above the ground surface. When the support wheel rides on the root embankment and the height of the sub-pulley becomes relatively higher than the main pulley, the transmission belt between both pulleys tends to loosen, but the tension pulley presses the transmission belt and relaxes the belt. However, the power of the main pulley is reliably transmitted to the sub pulley.

[0010] The passenger body is controlled to approach the fruit tree, the side plate is made to enter below the lower branch, and the subgrass is used to cut off the undergrowth around the root.

The main cutter cuts the grass under the vehicle body, sends it to the side sub-cutter by centrifugal force, and discharges the grass together with the cut grass to the rear of the side plate. Since the peripheral speeds of the two cutters are equal, all the grass of the main cutter is sent to the sub-cutter and is discharged smoothly without stagnation. In addition, the sub cutter has a smaller diameter than the main cutter, so it does not disturb the balance of the aircraft.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, this mower includes a passenger body 2 with an engine 1. Passenger car body 2
Has a front wheel 3 for steering and a rear wheel 4 for propulsion. Reference numeral 5 denotes a driver's seat, and reference numeral 6 denotes a steering wheel. The rotating main shaft 8 is inserted through the center of a bottom plate 7 that covers the bottom of the passenger vehicle body 2, and the center of the main cutter 9 is attached to the lower end thereof. The main cutter 9 is formed by forming blades on both left and right ends of a strip-shaped steel material.

The inner edge of the side plate 10 is hinged to the side edge of the bottom plate 7.
1 and pivotally protrude the side plate 10 to the side of the passenger car body 2 (FIGS. 3 and 4). A pair of support wheels 12 are provided on the outer side of the side plate 10 in front and rear thereof so as to be variable in direction.
Reference numeral 13 denotes a fulcrum for changing the direction of each support wheel 12.

A rotary sub shaft 14 penetrates through the side plate 10, and the center of the sub cutter 15 is attached to the lower end thereof. The sub-cutter 15 has a pair of blades 16 mounted on its left and right ends so as to freely move back and forth. Each blade 16 has a blade portion 18 at a front edge and a rising edge 19 at a rear edge. Lower standing side 19
Is tilted high (FIGS. 6 and 7). Reference numeral 20 denotes a stopper pin for preventing excessive rotation of the sub cutter 15.
The length of the left and right ends of the sub cutter 15 is the main cutter 9
Formed shorter than that of

At the upper ends of the rotating main shaft 8 and the rotating sub shaft 14,
The main pulley 21 and the sub pulley 22 are respectively attached, and a transmission belt 23 is stretched between the pulleys 21 and 22. The diameter of the sub pulley 22 is smaller than that of the main pulley 21. Reference numerals 24 and 25 denote a pair of tension pulleys.
And the transmission belt 23 is pressed from the front and back. 26 is a spring for pulling the tension pulleys 24 and 25.

On the outer edge of the side plate 10, a rubber balloon hanging curtain 27 is connected in a height-adjustable manner.
A protective plate 28 is provided on the upper surface of the cover 0 to cover belts and pulleys.

An operator operates the passenger car body 2 while sitting on the driver's seat 5 and operating the handle 6. The passenger body 2 moves forward in the direction of the white arrow in FIG.

The power of the engine 1 is transmitted to the rotating main shaft 8 via the main pulley 21 to rotate the main cutter 9 and simultaneously rotate the sub-cutter 15 via the transmission belt 23. Here, the length of the left and right ends of the sub-cutter 15 is shorter than that of the main cutter 9, but the speed of the sub-pulley 22 is smaller than that of the main pulley 21. Are equal.

The support wheel 12 rolls as the passenger car body 2 advances, and the side plate 10 is hinged at its pivotal portion 1 according to the height of the terrain.
The sub-cutter 15 is floated up and down around the fulcrum 1 to keep the sub-cutter 15 at a certain height above the ground surface. The support wheel 12 turns around the direction change fulcrum 13 to the middle point and follows the traveling direction of the passenger vehicle body 2. As shown in FIG. 4, when the support wheel 12 rides on the embankment at the base and the height of the sub-pulley 14 becomes relatively higher than that of the main pulley 21, the transmission belt 23 between both pulleys tends to be loosened. Since the pulleys 24 and 25 elastically press the transmission belt 23, the belt 23 does not relax, and the power of the main pulley 21 is transmitted to the sub-pulley 22 reliably.
The front tension pulley 24 applies tension to the transmission belt 23 when braking the belt, and the rear tension pulley 25 applies tension to the transmission belt 23 when driving the belt.

The passenger body 2 is steered to approach the fruit tree, the side plate 10 is made to enter below the lower branch, and the subcutter 15 is used to cut down the undergrowth around the root.

The grass under the vehicle body is cut by the main cutter 9, sent to the side sub-cutter 15 by centrifugal force, and discharged by the sub-cutter 15 to the rear of the side plate 10 indicated by the arrow in FIG. 1 together with the cut grass. Here both cutters 9, 1
Since the peripheral speeds of the cutters 5 are equal, all the grass of the main cutter 9 is sent to the sub cutter 15 and does not stay between the cutters. Moreover, the blade body 16 of the sub cutter 15 extends in the radial direction due to centrifugal force, and the blade portion 18 is lowered and the rising side 19 is tilted high, so that a rising wind is generated, and even when the amount of grass is large, the grass is smoothed by the wind force. And grass is not clogged under the side plate 10. The blade body 16 is mounted on the shaft 1 so that it can be moved back and forth.
Therefore, even if it collides with an obstacle such as a stone, it rotates backward and escapes to prevent the blade 18 from being damaged.

If the amount of grass is too large, it is convenient to raise the height of the banner 27 as shown in FIG.

Since the diameter of the sub-cutter 15 is smaller than that of the main cutter 9, the balance of the machine body is not disturbed.

When the work is completed, the side plate 10 is erected with the sub-cutter 15 with the hinge 11 as a fulcrum, and the vehicle is run or stored on the road with the body width reduced.

FIG. 8 shows another embodiment of the tension pulley. In this embodiment, the pressing rolls 31 and 32 are respectively attached to the support arms 29 and 30 of the tension pulleys 24 and 25, and the transmission belt 23 is elastically pressed downward near the upper part of the hinge 11 so that the transmission belt 23 comes off from the sub pulley 22. More reliably. Reference numeral 33 denotes a mounting shaft for the support arms 29 and 30, and reference numeral 34 denotes a belt detachment prevention frame along the outer periphery of the sub pulley 22.

[0027]

In summary, according to the present invention, the side plate 10 is extended up and down to the side of the passenger body 2 having the main cutter 9 and the sub-cutter 15 is attached to the side plate 10 so that the main cutter 9 lowers the vehicle body. While cutting the grass, the side grass is cut by the sub-cutter 15 and the grass of the main cutter 9 is sent to the side sub-cutter 15 by centrifugal force, and the sub-cutter 15 is rearward of the side plate 10 together with the cut grass. By driving the passenger car body 2 to approach the fruit tree and causing the side plate 10 to enter below the lower branch, the undergrowth can be cut without leaving the root of the fruit tree.

The side plate 10 has support wheels 12 before and after it, and floats up and down with its pivot point as a fulcrum according to the height of the terrain, and keeps the sub cutter 15 at a constant height from the ground surface. Even when the soil at the root of the fruit tree is raised, the sub-cutter 15 can smoothly rotate and cut the grass without contacting the ground.

Further, in the present invention, since the peripheral velocities of the tips of the sub-cutter 15 and the main cutter 9 are equal, all the grass of the main cutter 9 is fed into the sub-cutter 15 and the grass does not stay between the cutters. Moreover, since the blade body 16 of the sub-cutter 15 has an upright edge 19 behind the blade portion 18, a rising wind is generated during rotation, and even when the amount of grass is large, the grass is quickly discharged by the wind force so that the side plate 10 is released. There is no grass underneath.

Further, when the support wheel 12 rides on the root embankment and the height of the sub-pulley 14 becomes relatively higher than that of the main pulley 21, the transmission belt 23 between the two pulleys tends to be loosened. Tension pulley 24,
Since the belt 25 elastically presses the transmission belt 23, the belt 23 is not loosened, and the power of the main pulley 21 can be reliably transmitted to the sub pulley 22.

[Brief description of the drawings]

FIG. 1 is a plan view showing a transmission mechanism of a mowing machine embodying the present invention.

FIG. 2 is a side view of the mower shown in FIG. 1;

FIG. 3 is a sectional view of a main part of the mower shown in FIG. 1;

FIG. 4 is a sectional view of a main part of the mower of FIG. 1 in a state of use.

FIG. 5 is an enlarged plan view of a transmission belt in the mower of FIG. 1;

FIG. 6 is an enlarged perspective view of a main part of a sub cutter in the mower of FIG. 1;

FIG. 7 is a side view of FIG. 6;

FIG. 8 is an enlarged plan view of another embodiment of the transmission belt according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 2 Passenger car body 3 Front wheel 4 Rear wheel 7 Bottom plate 8 Rotating main shaft 9 Main cutter 10 Side plate 11 Hinge 12 Support wheel 14 Rotating sub shaft 15 Sub cutter 16 Blade body 18 Blade part 19 Standing edge 21 Main pulley 22 Sub pulley 23 Transmission belt 24 Tension pulley 25 Tension pulley

Claims (1)

(57) [Claims] 1. A rotating main shaft is suspended at the center of a bottom plate of a four-wheeled vehicle body that is self-propelled by an engine. A center of a main cutter is attached to a lower end portion of the rotating main shaft. And a side plate is slidably extended to the side of the passenger vehicle body, and a pair of support wheels are variably provided on the outer side of the side plate before and after the side plate. The center of the sub-cutter is attached to the part, the sub-cutter has a pair of blades axially mounted on its left and right ends so as to be able to move back and forth, and each blade has a blade portion at the front edge and a rising edge at the rear edge, respectively. The length of the left and right ends of the sub cutter is shorter than that of the main cutter, and the belt is transmitted between the engine and the rotating main shaft, and the sub pulley of the rotating sub shaft is smaller in diameter than the main pulley of the rotating main shaft. Transmission bell A mowing machine in which a pair of tension pulleys for tensioning the transmission belt from front and rear are installed near a pivotal connection between the side plate and the bottom plate.