JPH0847323A - Mower - Google Patents

Abstract

PURPOSE:To provide a mower having an advantage in maintenance and capable of smoothly performing mowing on a footpath or a slope of the shoulder of a road, etc., by decreasing the weight, reducing the vibration, simplifying the construction and preventing the damage due to the collision against a hard foreign material, etc. CONSTITUTION:A mowing apparatus 7 is composed of a cutting member 12, which consists of an endless belt 15 provided with cutting blades 16 with a specified space in the peripheral direction. The cutting member 12 is stretched over pulleys in a state having a horizontal part (a) along the ground and it is driven in such a state. Further, a hollow part 7A through in back and forth direction is formed in the middle part of the mowing apparatus 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mowing machine for mowing weeds grown on ridges and shoulder slopes of ridges.

[0002]

2. Description of the Related Art Conventionally, as the above-mentioned mower, a reciprocating type or a reel type for cutting scissors with a receiving blade and a cutting blade, or a rotary type for cutting impact with a rotary blade has been provided. There was something.

[0003]

However, in a device equipped with a reciprocating type or reel type reaping device, it is necessary to manage the clearance between the receiving blade and the cutting blade and to manage the sharpness with high accuracy. It will be disadvantageous in terms of maintenance, if foreign matter gets caught in the gap between the receiving blade and the cutting blade, it will be in a locked state and it will not be possible to perform mowing work, it will be difficult to cut soft weeds, and vibration and cutting at the time of cutting The inconvenience such as the increase of the weight of the entire machine has occurred. Further, in the case where the rotary type mowing device is provided, it is necessary to arrange a plurality of rotary blades in parallel in order to widen the mowing width, so that the driving structure becomes complicated, and a hard stone such as a stone or a concrete piece is required. Inconveniences have arisen such that the rotary blade and the drive system may be damaged due to collision with foreign matter.

The object of the present invention is to reduce the weight, reduce the vibration, simplify the structure, and avoid the damage caused by the collision with a hard foreign matter, which is advantageous from the viewpoint of maintenance and also the ridge and the ridge. An object of the present invention is to provide a mower capable of appropriately cutting weeds on the shoulder slope of a ridge.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a cutting body in which a cutting blade is attached to an endless belt at a predetermined pitch in the circumferential direction is turned to a state having a horizontal portion along the ground. A reaping device configured to be hung and driven was provided, and a hollow portion that was pulled back and forth was formed in an intermediate portion of the reaping device.

In the second aspect of the present invention, in the first aspect of the invention, a blade portion is provided immediately after the cutting blade in the cutting body to repel grass cut by the cutting blade toward the hollow portion. Provided.

[0007]

According to the first aspect of the present invention, since impact cutting is performed by driving the cutting body to rotate, the gap between the receiving blade and the cutting blade required in a machine equipped with a reciprocating type or reel type cutting device is provided. There is no inconvenience that it is unnecessary to manage or control the sharpness with high accuracy, and the foreign matter is caught in the lock state to make the mowing work impossible. Also, soft weeds can be easily cut by the impacting collision of the cutting blade caused by the turning drive of the cutting body. Furthermore, since the mowing device is formed with a simple structure in which the cutting body with the cutting blade attached to the endless belt is driven by turning it, there is no inconvenience that the weight of the entire mowing machine becomes large, and the vibration that occurs during cutting is eliminated. Will also be reduced. Moreover, the cutting width can be easily widened by turning the horizontal part (cutting surface) of the cut body made of the endless belt along the ground so that it becomes long, so that the cutting width is the same as that provided with a rotary type cutting device. Therefore, there is no inconvenience that the drive structure becomes complicated to increase the width. Moreover,
When the cutting blade collides with a hard foreign object such as a stone or concrete piece, the impact between the endless belt and the pulley that drives and guides the endless belt can be absorbed by the elasticity and elasticity of the endless belt. It is possible to suppress damage to the cutting blade and damage to the drive system due to collision with foreign matter. In addition, by forming a hollow part in the middle part of the mowing device that goes back and forth, the mowing grass cut by the cutting body from the hollow part is removed from the front part of the mowing device as the machine runs. Since it will be able to smoothly discharge toward the back,
It is possible to suppress the inconvenience that mowing grass is accumulated on the front part of the horizontal part which is the mowing surface of the mowing device and it becomes difficult to mow the weeds by the cutting body.

By the way, although it is conceivable that the cutting body is composed of an endless chain, it becomes necessary to lubricate the endless chain when compared with the case where the cutting body is composed of an endless belt. At the same time, a problem such as cutting grass being entangled between the link plates of the endless chain is likely to occur, which is disadvantageous in terms of maintenance and cutting accuracy. In addition, the noise during the mowing operation becomes larger than that in the case where the cutting body is composed of the endless belt.

According to the second aspect of the present invention, the blade portion provided immediately behind the cutting blade repels the grass mowed by the cutting blade toward the hollow portion of the cutting device so that the hollow portion is formed along with the traveling of the machine body. Since the grass can be discharged more smoothly from the front of the mowing device to the rear of the mowing device, the mowing grass is accumulated on the front part of the horizontal part, which is the mowing surface of the mowing device, and the cutting body is cut. It is possible to eliminate the inconvenience that it becomes difficult to mow weeds due to.

[0010]

Therefore, according to the first aspect of the present invention, the weight reduction,
It has become possible to reduce vibration, simplify the structure, avoid damage due to collision with hard foreign matter, and smooth the mowing work. In other words, it is advantageous in terms of operability and maintenance as a mower,
It has become possible to provide a mower that can appropriately and smoothly mow weeds on a ridge or a shoulder of the ridge.

According to the second aspect of the present invention, it is possible to more smoothly cut weeds on a ridge or a shoulder of the ridge by making a simple improvement such that a blade is provided immediately after the cutting blade. We have come to be able to provide a mower that can.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a side view of a walk-behind mower which is an example of a mower. This mower is equipped with a mission case 1 also serving as a frame, an engine 2 mounted on the mission case 1, a chain type transmission mechanism 3 extending forward from the transmission case 1, and a tip of the chain type transmission mechanism 3. One-wheeled walking machine body 6 including the driven wheels 4 and the steering wheel 5 extending from the mission case 1 toward the upper rear side.
It is configured by providing a reaping device 7 on the front part of the.

As shown in FIGS. 1 and 2, the mowing device 7
Is a mowing case 8 also serving as a frame formed in a substantially equilateral triangle shape when viewed from the front, a first pulley 9 arranged at the center of the upper part inside the mowing case 8, and a second pulley arranged at the lower left end inside the mowing case 8. The pulley 10, the third pulley 11 arranged at the lower right end inside the mowing case 8, and the pulleys 9, 1 thereof.
It is composed of an endless belt-shaped cutting body 12 wound around 0 and 11 with a horizontal portion a along the ground, and extends from the upper center of the mission case 1 toward the upper center of the mowing case 8. The main frame 13 made of steel pipe material and the like, and the left and right auxiliary frames 14 made of steel pipe material extending from both lower sides of the mission case 1 toward both lower ends of the mowing case 8 make the upper side of the mowing device 7 It is supported in a rearwardly tilted position, which is located rearward.
At the lower part of the middle part of the mowing device 7, the mowing device cut by the cutting body 12 is cut along with the traveling of the traveling body 6.
A hollow portion 7A that discharges backward from the front part of the cutting device is formed so as to come out forward and backward, and cut grass accumulates on the front part of the horizontal part a that is the cutting surface of the cutting device 7, and weeds by the cutting body 12 are formed. It suppresses the inconvenience that it becomes difficult to mow species. As shown in FIGS. 3 and 4, the cutting body 12 includes an endless belt 15 having a V-shaped cross section and having a reinforcing core material 15 a made of a plurality of metal materials, and a predetermined pitch in the circumferential direction of the endless belt 15. The cutting blade 16 is attached. The cutting blade 16 includes a blade portion 16 a protruding outward of the endless belt 15 and an engaging portion 1 engaging with the endless belt 15.
6b, and the engaging portion 16b is built in the endless belt 15 in a state of engaging with the core material 15a.

Immediately after the cutting blade 16 of the cutting body 12 (on the side immediately above the cutting body 12 in the rotation direction of the cutting body 16), the rear end of the blade portion 16a of the cutting blade 16 (in the cutting body 12 rotation direction of the cutting portion 16a). At the end on the upper hand side, there is a blade portion h that repels the grass cut by the cutting blade 16 toward the hollow portion 7A from the rear end of the blade portion 16a to the upper rear part (the upper portion in the rotating direction of the cutting body 12). It is extended toward the upper side). That is, it is possible to more smoothly discharge the mowing grass from the hollow portion 7A, and the mowing grass is accumulated on the front part of the horizontal portion a serving as the mowing surface of the mowing device 7 to mow the weeds by the cutting body 12. The problem is that it is difficult to do.

The drive of the reaping device 7 will be described. As shown in FIG. 1, the main frame 13 is internally provided with a bevel gear type transmission mechanism 17, and the bevel gear type transmission mechanism 17 causes the bevel gear type transmission mechanism 17 to move forward from the mission case 1. The extended power take-out shaft 1a and the rotation support shaft 9a of the first pulley 9 are interlockingly connected. That is, the power from the engine 2 is transmitted to the first pulley 9 via the transmission case 1 and the bevel gear type transmission mechanism 17, and the first pulley 9 is driven to rotate, whereby the cutting body 12 is moved to the first pulley 9 and the first pulley 9. The two pulleys 10 and the third pulley 11 are rotated and driven. As a result, weeds can be cut off by impact cutting of the cutting blade 16. By the way, as shown in FIGS. 1 and 2, the cutting blade 16 of the cutting body 12 projects from the mowing case 8 in the horizontal portion a along the ground and fits in the mowing case 8 in the other portions. ing.

[Other Embodiments] Other embodiments of the present invention will be listed below. The mower may be a two-wheeled walking type traveling machine body provided with the mowing device 7, or a riding type traveling machine body provided with the mowing device 7. Good. The endless belt 15 is not limited to the V-belt having a V-shaped cross section, and a flat belt or the like may be adopted, for example. In the above-described embodiment, the cutting blades 16 are attached to the endless belt 15 at a predetermined pitch in the circumferential direction by incorporating the engaging portions 16b of the cutting blades 16 into the endless belt 15 in a state of engaging the core material 15a. However, as shown in FIG.
By fixing the engaging portion 16b of the cutting blade 16 to the outer peripheral surface of the endless belt 15 with a fixing tool such as a rivet or a bolt or a nut, the cutting blade 16 is arranged at a predetermined pitch in the circumferential direction of the endless belt 15. It may be attached. The hollow portion 7A of the cutting device 7 may be formed in a state in which a case portion that covers and protects the horizontal portion a of the cutting body 12 remains. The cutting body 12 may not be provided with the blade portion h that repels the grass cut by the cutting blade 16. As the blade portion h, as shown in FIG. 6, a portion immediately after the cutting blade 16 on the outer peripheral surface of the endless belt 15 (the cutting blade 16
To the outer side of the cutting body 12 in the direction of rotation) by forming a protruding portion 15b that protrudes outward in a rearward rising posture (a posture that becomes higher toward the upper side in the direction of rotation of the cutting body 12). May be. The transmission mechanism from the transmission case 1 to the harvesting device 7 is not limited to the bevel gear type,
For example, a universal joint type, a chain type or a belt type may be adopted.
Further, the power take-off shaft 1a of the mission case 1 and the rotation support shaft 9a of the first pulley 9 are configured to be interlocked with each other.
The power take-off shaft 1a and the rotation support shaft 10a of the second pulley 10 or the rotation support shaft 11a of the third pulley 11 may be interlockingly connected.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

[Figure 1] Overall side view of the mower

FIG. 2 is a front view of the reaping device.

FIG. 3 is a partially enlarged view of a cutting body showing a cutting blade attached to an endless belt.

FIG. 4 is a sectional view taken along line E-I in FIG.

FIG. 5 is a cross-sectional view of a cut body showing a state in which a cutting blade is attached to an endless belt according to another embodiment.

FIG. 6 is a partially enlarged view of a cut body showing a configuration of a blade portion in another embodiment.

[Explanation of symbols]

 7 Mowing device 7A Cavity 12 Cut body 15 Endless belt 16 Cutting blade a Horizontal part h Blade part

Claims (2)

[Claims] 1. A cutting body (12) in which a cutting blade (16) is attached to an endless belt (15) at a predetermined pitch in the circumferential direction is driven by turning it around a state having a horizontal portion (a) along the ground. A mower having the reaping device (7) configured as described above, and a cavity (7A) that is pulled out forward and backward is formed in an intermediate portion of the reaping device (7). 2. Immediately after the cutting blade (16) in the cutting body (12), a blade portion (repelling grass cut by the cutting blade (16) toward the hollow portion (7A) ( The mower according to claim 1, wherein h) is provided.