JP2528303Y2 - Mower with cutting height sensor - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is equipped with a rubber crawler on the fuselage, and the grass, small trees, etc. growing mainly on the slope of the embankment are maintained at a constant cutting height and contour lines. The present invention relates to a mowing machine provided with a cutting height sensor for cutting along.

[Conventional technology]

FIG. 1 shows a side view of such a mower.
Rubber crawlers 2 are attached to both right and left ends of the machine body 1, respectively. A mowing unit U is pivotally connected to a front portion of the machine body 1 by a hinge pin 3, and the mowing unit U can be moved up and down by the action of the mowing unit cylinder 4. ing. As shown in FIG. 2, a large number of hammer knives 6 are attached to the rotating shaft 5 mounted on the mowing unit U, and the driving force of the engine 7 mounted on the body 1 is transmitted to the rotating shaft 5. The hammer knife 6 rotates. The cutting height sensor S has a lifting rod 9 urged downward into the support tube 8 and is inserted therethrough. A grounding roller 11 is attached to a lower end of the lifting rod 9,
This is a structure in which a sensor unit 12 is provided at the upper end of the support cylinder 8. The cutting height sensor S is disposed immediately after the hammer knife 6 attached to the rotating shaft 5 of the cutting unit U and at the center in the width direction. At the time of cutting, the grounding roller 11 of the cutting height sensor S follows the ground surface 10 and senses the terrain. Based on the result, the cutting unit cylinder 4 is operated to move the cutting unit U up and down. , Cutting height H of small trees (see Fig. 2)
Is kept constant. Then, when mowing the slope of the embankment, the mowing machine is reciprocated along a contour line, starting from a position where the slope is low, and then proceeds to a position where the slope is high, and mowing is performed. .

In order for the body 1 to move (forward) in the direction of arrow P to cut the grass, the cutting height sensor S travels on the portion where the cutting of the grass has been completed by the hammer knife 6 when the body 1 moves forward. Therefore, grass and small trees hardly get caught on the ground roller 11 of the cutting height sensor S. However, since the mower is reciprocated along the contour line as described above, the direction of the mower must be changed alternately. At this time, the mowing machine is often moved backward, whereby the ground roller 11 is caught by the small trees that have not been mowed, and the cutting height sensor S will be damaged if ignoring this and performing unreasonable work. . Immediately after mowing was started by changing the direction of the mowing machine, the amount of movement of the mowing machine along the inclination direction of the slope was too large, and grass and small trees remained between the mowing machine and the part where the mowing was completed. In this case too, the progress must be stopped and the mower must be retracted.

[Problems to be solved by the invention]

The present invention has been made in view of the above-mentioned problems of a mower equipped with a mowing height sensor, so that when the mowing machine is retracted, components of the mowing height sensor are not caught by grass and small trees, and the mowing work is performed at a constant mowing height. The task is to be able to perform efficiently.

[Means for solving the problem] Means adopted by the present invention to solve this problem are:
A body equipped with a rubber crawler, a mowing unit mounted on the front part of the body so as to be able to move up and down, and a lifting rod is inserted into the support cylinder in a state where the lifting rod is urged downward, and the lower end of the lifting rod is grounded. A roller is mounted, and has a cutting height sensor for reading the shape of the ground surface at the time of cutting, and the cutting unit is moved up and down in accordance with the shape of the ground surface read by the cutting height sensor, so that the cutting height is adjusted. Mowing machine equipped with a mowing height sensor configured to mower while holding the mower constant, the supporting cylinder can be moved in the axial direction by a pair of supporting rolls at the center of the supporting cylinder, In one direction, the one end of the support link is connected to a portion of the frame of the mowing unit ahead of the support cylinder, and the base end of the cylinder is connected to the support cylinder in the frame. Linked to remote posterior portion, the upper portion than the pair of support rolls in the support tube, and the other end of the support link is to a rod of said cylinder and connected respectively.

[Action of the invention]

At the time of retreat of the mowing machine, when the rod of the cylinder is protruded, the entire support cylinder through which the elevating rod is inserted is moved up, and the support cylinder is rotated at the pair of support rolls, so that the support cylinder is rotated. Is moved toward the rear of the fuselage, and the grounding roller attached to the lower end of the elevating rod is moved upward from the normal use position obliquely rearward to the retracted state. For this reason, the mowing operation can be performed while the mowing machine is retracted without damaging the components such as the ground roller constituting the mowing height sensor.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to examples. In addition, only the characteristic portions of the present invention will be described, avoiding redundant description with the portions described in the section of the "prior art".

As shown in FIGS. 2 to 5, a pair of support rolls 13 are attached to the frame of the mowing unit U, and the central portion of the support cylinder 8 constituting the cutting height sensor S is connected to the pair of support rolls 13. Supported by. This support roll 13
It has a drum shape whose diameter gradually decreases from both ends toward the center (see FIG. 5). A base end of the support link 14 is pivotally connected to a frame 19 (see FIG. 4) of the mowing unit U via a pin 15.
Is pivotally connected to the upper end via a pin 16. A base end of a cylinder 17 for raising and lowering the cutting height sensor is pivotally connected to a frame 19 (see FIG. 4) of the cutting unit U, and a distal end of a rod 18 of the cylinder 17 is pivotally connected to the support link. .

FIG. 2 shows a state in which the mowing machine is moving forward while performing the mowing operation while reading the shape of the ground surface 10 with the mowing height sensor S, and the support cylinder 8 constituting the mowing height sensor S is slightly The ground roller 11 is in a backward tilted posture and is in contact with the ground surface 10. In this state, when the rod 18 of the cylinder 17 is protruded, the lower end of the support cylinder 8 is moved rearward while the entire support cylinder 8 is pulled upward. For this reason, as shown in FIG. 3, the support cylinder 8 changes from the backward inclined posture to the forward inclined posture, and the ground roller 11 attached to the lower end portion of the lifting rod 9 is lifted upward at an oblique rear. Cutting height sensor S
Is retracted upward from the normal use position after the slant. In this state, when the mower is moved backward in the direction of arrow Q, the ground roller 11 does not catch on the uncut grass and small trees, and the grass mower is smoothly retracted while cutting the grass and small trees. Let me do. Therefore, when the mowing machine is reciprocated along the contour line to perform the mowing operation, the direction of the mowing machine can be smoothly changed.

[Effect of the invention]

Since the mower equipped with the mowing height sensor according to the present invention is configured as described above, when the mower is retracted, when the rod of the cylinder is protruded, the entire support cylinder through which the lifting rod is inserted is raised. While being moved, the support cylinder is rotated at the pair of support rolls, whereby the lower end of the support cylinder is moved rearward of the fuselage, and the ground roller attached to the lower end of the lifting rod Is moved upward from the normal use position to the rear after being inclined, and is in a retracted state.

For this reason, when cutting grass and small trees such as slopes of embankments on contour lines, frequently change the direction of the mower,
At this time, the mowing machine is retracted. By moving the grounding roller, which constitutes the cutting height sensor, from the regular position to the rear and obliquely upward, the grounding roller can be retracted.

Therefore, the mowing machine can be retracted smoothly while cutting, without the grounding roller, grass and small trees being caught, so that mowing work can be performed while retracting the mowing machine without damaging the components of the cutting height sensor. I can do it.

[Brief description of the drawings]

FIG. 1 is a side view of a mower equipped with a cutting height sensor according to the present invention, FIGS. 2 and 3 are partial side views of the mower when the mower is moving forward and backward, respectively. Support link 14
FIG. 5 is a plan view of a part of a pair of support rolls 13. The description of the reference numerals of the main parts constituting the present invention is as follows. S: Cutting height sensor U: Cutting unit 1: Airframe 2: Rubber track 8: Support cylinder 9: Lifting rod 10: Ground surface 11: Ground roller 13: Support roll 14: Support link 17: Cylinder 18 for raising and lowering the cutting height sensor : Rod 19: Mowing unit frame

Claims (2)

(57) [Scope of request for utility model registration] 1. A body provided with a rubber crawler, a mowing unit mounted on a front portion of the body so as to be able to move up and down, and a lifting rod inserted through a support cylinder in a state of being urged downward. And a cutting height sensor for reading the shape of the ground surface at the time of cutting, and raising and lowering the cutting unit in accordance with the shape of the ground surface read by the cutting height sensor. Thereby, in a mowing machine provided with a cutting height sensor configured to perform mowing while maintaining a constant cutting height, the center portion of the supporting tube can be moved in the axial direction by a pair of supporting rolls. However, it is supported so as to be immovable in the lateral direction, one end of the support link is connected to a portion of the frame of the mowing unit ahead of the support cylinder, and the base end of the cylinder is the frame. The other end of the support link and the rod of the cylinder are respectively connected to a portion of the support tube above the support cylinder and a portion of the support cylinder above the pair of support rolls. By moving the lower end of the support cylinder toward the rear of the fuselage while moving the entire support cylinder upward by projecting the rod of the cylinder, the ground roller is retracted upward from the regular use position after being inclined. A mowing machine equipped with a cutting height sensor, wherein the mowing machine is configured to be able to operate. 2. The cutting height sensor according to claim 1, wherein said pair of support rolls are formed by a drum-shaped roll whose diameter gradually decreases from both ends toward the center. Mower.