JPH02142401A - Lawn root cutting machine - Google Patents

Abstract

PURPOSE:To reasonably cut a series of lawn roots together with soil by traveling a lawn root cutting machine equipped with a supporting member rotatably bearing a root cutting disc on a shaft so as to reciprocate the supporting member in the longitudinal direction at a specific speed, on a lawn vegetating place. CONSTITUTION:At a lawn vegetating place such as golf course or park, a machine body is traveled while driving a lawn root cutting machine 2 by PTO shaft 9, a supporting member is brought into contact with lawn face under pressure while reciprocating the supporting member in the longitudinal direction, a root cutting disc 20 rotatably supported on a shaft of the supporting member is cut into soil to inexpensively cut lawn root.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a lawn root cutting machine for cutting the roots of grass growing on golf courses, parks, home gardens, lawns, etc.

(B) Prior art Conventionally, as a device for revitalizing grass vegetation by cutting the grass roots, a disk having multiple protrusions on its outer periphery was rotatably supported on a bracket hanging from the machine frame of a traveling vehicle. Turf root cutters are already known.

(c) Problems to be solved by the invention In the known lawn root cutting machine, the protrusions on the outer periphery of the disk only penetrate into the soil and cut the roots in that area, but do not cut roots between adjacent protrusions. Therefore, sufficient root pruning could not be performed.

These problems should be solved (forming a blade on the outer periphery of a disk without protrusions and supporting it rotatably will make it difficult to dig into the soil, and if the disk is forcibly driven to rotate) New problems arose, such as the outer peripheral blade colliding with stones in the soil and being damaged, the cutting groove becoming wider and the cut marks becoming poorer, and the root cutting disk having to be made thicker.

(D) Means for Solving the Problems The present invention includes a prime mover mounted on a machine frame having wheels, a support member mounted on the machine frame so as to reciprocate in the front and back direction, and a root cutter mounted on the support member. The above-mentioned problem was solved by rotatably supporting the disk and attaching a drive device for reciprocating it at a speed faster than the running speed, thereby making the root cutting disk reciprocate while pressing it against the soil.

(E) Function On a lawn such as a golf course, a home garden, or a park, when the support member is reciprocated back and forth through the drive device by the power of the prime mover and is pressed against two surfaces, and the machine is run, the root The cutting disk cuts forward into the ground at a high combined speed due to the back and forth movement by the reciprocating drive device and the running of the machine body. In this process, the root cutting disk first floats up to some extent due to cutting resistance, and then, when moving backward, the cutting disk eliminates the floating while rotating in the kerf at a slow combined speed in the cutting groove with low cutting resistance.

In the next forward stroke, a finishing cut is made initially and then a new portion is cut. By repeating such back and forth cutting, a sufficient depth of cut into the soil can be obtained.

Furthermore, if there are stones in the soil, the cutting disk will rotate on its own axis while following the tensile action of the supporting member and will overcome the stones, thereby preventing damage.

(F) Embodiment To explain an embodiment of the present invention with reference to the drawings, l is a transmission case of a tractor, and at the rear of the transmission case, a lawn root cutter 2 can be raised and lowered by a top link 3 and left and right lower links 4. The left and right lift arms 5.5 are connected to the middle part of the lower link 4.4 via a lift rod 6.6, and the human power shaft 7 projects forward from the gear case 7a of the lawn cutter 2. is driven by a PTO shaft 9 via a yoke joint 8.

A cylindrical main frame IO is provided on both sides of the gear case 7a, and a plurality of transmission cases 11 are suspended from the main frame IO at predetermined intervals in the lateral direction. Supports a horizontal shaft 10a driven by an input shaft 7 via a chino 14 or a plurality of bevel gears,
A crankshaft 13 is supported at the lower part of the transmission case 11 via a bearing.

A tool bar 15 whose front part is connected to the main frame IO in a vertically tiltable manner is supported by a vertical adjustment mechanism 16, and a plurality of swing arms 17 hanging diagonally rearward are attached to a support shaft 18 in the middle part thereof. A root cutting disk 20 is rotatably supported at the lower end of each swing arm 17 by a shaft 20a.

The reciprocating drive device includes the crankshaft 13, a crankbin 21 protruding from an eccentric position of a disc 12 fixed to the end of the crankshaft 13, a front part connected to the crankbin 21, and a rear end connected to the crankshaft 13. The crank shaft 13 is connected to the transmission case 11 by the input shaft 7.
multiple gears internally installed, or the crankshaft 13 and the horizontal axis lO
When the eccentricity of the crank bin 21 is set to 2 cm, the amplitude of the root cutting disc 20 is 4 cr.
n, and the vibration speed is 151 to 2 times the traveling speed, for example, 3 to 4 km when the traveling speed is 2 km/h.
/ 11, and the adjacent crank bin 2
1... is shifted by 180 degrees.

The root cutting disk 20 has a diameter of 45 to 50 cm, and is configured to penetrate into the soil to a depth of about 1.5 cm by means of a regulating shaft 25 supported by a bracket 23 at the rear of the tool bar 15.

Next, to explain the effect, in places where grass grows, p.
When the machine is run while driving the lawn cutter 2 by the axis 9, it swings back and forth in opposite directions around the support shaft 18 by the adjacent swing arms 17, crank rods 22, etc. As a result, when the root cutting disks 20 move forward, they rotate slightly due to the cutting resistance while moving forward to cut into the soil, and then move backward at a composite speed of the backward speed and the traveling speed. In this process, the root cutting disk 20 moves back inside the groove formed when moving forward, and in the following niI direction transfer process, the process of cutting down the existing groove and cutting into the new soil in front is repeated. A series of narrow, approximately 15 cm deep grooves are formed, which cut through the grass roots.

If the root cutting disk 20 hits a stone or foreign object in the soil during such work, since the root cutting disk 20 is rotatable and reciprocates back and forth, it can easily overcome the stone and prevent damage. Moreover, since the adjacent root cutting discs 20 are moved back and forth in opposite directions, vibration and maximum torque can be reduced.

In addition, although the above-mentioned embodiment explained the case where the present invention was applied to a passenger-type traveling vehicle, it can also be applied to a walking-type traveling vehicle.

(G) Effects of the Invention As described above, the present invention includes a prime mover mounted on a machine frame having wheels, a support member mounted on the machine frame so as to reciprocate in the front and back direction, and a root cutter mounted on the support member. Since the disk 20 is rotatably supported on a shaft and is equipped with a drive device that reciprocates at a speed higher than the running speed, the root cutting disks 20... can be moved back and forth by the reciprocating drive device while freely rotating according to the cutting resistance. This allows the grass roots to be cut in a series along with the soil without much effort. Moreover, if there are stones or foreign objects in the soil, the root cutting disk 20 is rotatable, so that they can be overcome without being damaged. Since the thickness of the root cutting disc 20 can be made thinner than that of a forced drive system, the root cutting machine can be made lighter and cheaper, and the cutting resistance is small (thereby reducing power consumption). You can also.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a side view and FIG. 2 being a rear view with a part of the transmission device cut away. 1. Mission case, 7. Input shaft, 10. Main frame, 11. Transmission case, 15 Tool bar, 17.
・Swinging arm, 20.. Root cutting disk, 22.. Crank rod

Claims (1)

[Claims] A prime mover is mounted on a machine frame having wheels, a support member is attached to the machine frame so as to reciprocate in the front and back direction, and the root cutting disc 20 is rotatably supported on the support member, and at a speed lower than the traveling speed. A lawn root cutting machine characterized by being equipped with a drive device that allows it to reciprocate at a high speed.