KR20010087028A - A lawn-mower - Google Patents

Abstract

PURPOSE: A lawn mower is provided which prevents bending deformation generated at the output axis due to the high speed rotation of a rotation plate and cutters coupled to the output axis of an engine, and protects the cutters by rotating into the rotation plate when a plurality of cutters coupled to the rotation plate are collided with stones. CONSTITUTION: The lawn mower comprises a gap maintaining drum (112) which is formed on a rotation plate (111) coupled to the upper most side part of an output axis (102) so that the rotary power of the output axis (102) is supplied to the rotation plate (111) from the shortest distance (H) of an engine (101) for preventing generation of bending deformation at the output axis (102) due to the high speed of rotation of the rotation plate (111) and the cutters (121) coupled to the output axis (102) of the engine (101), wherein the lawn mower further comprises cutters (121) which is loosely coupled by a bolt (114) and a nut (115) so that the penetrating hole (122) and the coupling hole are easily rotated after conforming a coupling hole (113) formed on the rotation plate (111) with a penetrating hole (122) so that the cutters are concealed by being rotated into the rotation plate (111) when a plurality of cutters (121) coupled to the rotation plate (111) are collided with stones.

Description

Lawn Mower {A LAWN-MOWER}

The present invention relates to a lawn mower, in particular, to the high speed rotation of the rotating plate and cutter coupled to the output shaft of the engine by coupling the drum for maintaining the gap to the top of the output shaft to supply the rotational force of the output shaft to the rotating plate at the shortest distance of the engine It is possible to prevent the bending deformation in the output shaft by a plurality of cutters to be coupled to the rotating plate by loosely coupling the cutter for easy rotation by bolts and nuts after matching the through hole with the coupling hole formed in the rotating plate It relates to a lawn mower so that it can be concealed by being rotated into the inside of the rotating plate when colliding with the stone.

The configuration of a conventional lawn mower is shown in FIG.

The above configuration is composed of an output shaft 2 coupled to the engine 1 for generating a rotational force, a rotating plate 4 coupled to the output shaft 2, and a cutter 5 coupled to the rotating plate. have.

In the conventional lawnmower having the above configuration, the output shaft 2 is rotated by the operation of the engine 1, and the rotation plate 4 and the cutter 5 coupled to the output shaft 2 are rotated. You can mow the lawn.

However, since the cutter 5 of the lawn mower must protrude to the lower side of the cover 3, the length h of the output shaft 2 is formed long.

As described above, when the length of the output shaft 2 is longer, a torsional stress is generated at the output shaft 2 when the cutter 5 and the rotating plate 4 are rotated. In the case of a collision, since a considerable load is applied to the output shaft 2, the problem that the output shaft 2 is bent arises.

When the output shaft 2 is bent as described above, not only the rotation of the cutter 5 is normally performed, but also the output shaft 2 is directly connected to the crank shaft inside the engine 1 so that the engine 1 I had a problem that had to exchange itself.

In addition, when the cutter 5 coupled to the output shaft 2 collides with a stone or a large tree while mowing the lawn, the cutter 5 is directly coupled to the output shaft 2 by a bolt to rotate at high speed. Since the cutter 5 is bent or broken, the phenomenon occurs.

As described above, when the cutter 5 is broken, the broken pieces are scattered, and thus there is a very dangerous problem of injury to workers or people around.

The purpose of the present invention for solving and solving these conventional problems,

High speed rotation of the rotating plate and cutters coupled to the output shaft of the engine prevents bending deformation from occurring in the output shaft, and allows multiple cutters coupled to the rotating plate to rotate and conceal inside the rotating plate when colliding with stones. To provide.

In order to achieve the above object, the present invention,

In order to supply the rotational force of the output shaft to the rotating plate at the shortest distance of the engine, the space keeping drum is coupled to the top of the output shaft,

By matching the through holes to the coupling holes formed in the rotating plate, the coupling between the through holes and the coupling holes loosely by bolts and nuts for easy rotation can achieve the object of the present invention.

1 is a cross-sectional view of a conventional lawn mower

Figure 2 is a cross-sectional view showing the output shaft protection configuration and cutter protection configuration of the present invention lawn mower

Figure 3 is an enlarged view of the main portion showing the cutter protection action of the lawn mower of the present invention

Shortest distance H of the engine 101 in order to prevent bending deformation in the output shaft 102 due to the high speed rotation of the rotor plate 111 and the cutters 121 coupled to the output shaft 102 of the engine 101. Is provided with a space maintaining drum 112 formed on the rotating plate 111 is coupled to the uppermost portion of the output shaft 102 to supply the rotational force of the output shaft 102 to the rotating plate (111).

In addition, the plurality of cutters 121 coupled to the rotating plate 111 are rotated through the coupling hole 113 formed in the rotating plate 111 to be concealed by being rotated into the inside of the rotating plate 111 when colliding with the stone. After coinciding with 122, the through hole 122 and the coupling hole 113 were provided with a cutter 121 that is loosely coupled so as to be easily rotated by the bolt 114 and the nut 115.

Referring to the operation of the present invention as described above is as follows.

First, when the output shaft 102 rotates at high speed by the operation of the engine 101, the interval maintaining drum 112 and the rotating plate 111 coupled to the output shaft 102 perform high speed rotation.

The cutter 121, which is loosely coupled so as to be easily rotated by the bolt 114 and the nut 115 after matching the through hole 122 with the coupling hole 113 formed in the rotating plate 111, also performs high speed rotation. You can mow the lawn.

As described above, according to the present invention, as shown in FIG. 1, since the rotational force of the output shaft 102 can be supplied to the rotating plate 111 at the shortest distance H of the engine 101 by the interval maintaining drum 112, the output shaft ( It is possible to prevent the bending deformation in 102.

In addition, since the cutter 121 of the present invention is loosely coupled so that the rotating plate 111 can be easily rotated, when the rotating plate 111 rotates at a high speed, the cutter 121 moves to the outside of the rotating plate 111 by centrifugal force. The lawn is mowed while exposed as a solid line.

However, when the cutter 121 for mowing the lawn collides with a stone or a large tree in the state of being exposed to the outside of the rotating plate 111, the cutter 121 performs self-rotation as shown by the virtual line of FIG. While being concealed inside the rotating plate 111.

Therefore, the cutter is not broken and scattered.

In addition, the cutter 121 concealed inside the rotating plate 111 can mow the grass while being stretched outward of the rotating plate 111 again by centrifugal force when the lawn mowing operation is avoided by avoiding stones or large trees.

In addition, a plurality of coupling holes 113 are formed in the rotating plate 111 of the present invention, and the coupling holes 113 are different coupling holes 113 when the coupling holes 113 are expanded due to use for a long time. It is considered to be able to use a combination of cutters (121).

The present invention as described above combines the interval maintaining drum to the uppermost part of the output shaft to supply the rotational force of the output shaft to the rotating plate at the shortest distance of the engine, and matched the through-hole with the coupling hole formed in the rotating plate bolt and the hole and the coupling hole and By coupling the cutter loosely for easy rotation by the nut, it is possible to prevent bending deformation in the output shaft due to the high speed rotation of the rotary plate and cutters coupled to the output shaft of the engine, and when multiple cutters coupled to the rotary plate collide with the stone It is useful to protect the cutter by allowing the inside of the rotating plate to be rotated and concealed.

Claims (2)

Rotating plate coupled to the uppermost part of the output shaft so that the rotational force of the output shaft can be supplied to the rotating plate at the shortest distance H of the engine to prevent bending deformation in the output shaft due to the high speed rotation of the rotating plate and cutters coupled to the output shaft of the engine. Lawn mower, characterized in that provided with a space keeping drum formed in the. The method of claim 1, When the plurality of cutters coupled to the rotating plate collide with the through holes formed in the rotating plate to be concealed by being rotated into the inside of the rotating plate when colliding with the stones, the through holes and the combining holes are loosely loosened by bolts and nuts for easy rotation. Lawn mower comprising a cutter to be coupled.