KR20150041911A

KR20150041911A - Safety cutter for grass cutting machine

Info

Publication number: KR20150041911A
Application number: KR20130120458A
Authority: KR
Inventors: 이병희
Original assignee: 이병희
Priority date: 2013-10-10
Filing date: 2013-10-10
Publication date: 2015-04-20

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cutter for use in a lawn mowing machine capable of cutting grass and weeds quickly, and more particularly, And a separate guide cover is coupled to the outside of the upper fixing plate and the lower fixing plate so that the blade is repeatedly fixed to the chain, A safety cutter having grooves formed repeatedly is provided and fixed so as to be connected to the rotary shaft of the lawn mower,
It is very safe because it does not protrude to the outside for cutting and removing weeds, and it is possible to perform a relatively simple and safe operation even in a place where there is a lot of gravel or an uneven floor, It has a form that cuts weeds directly by cutting the weeds not by forcibly cutting the weeds by the blade, but it cuts the weeds directly like scissors. Therefore, it is possible to perform efficient mowing work even at low-speed operation of the mowing machine, so that it is relatively quiet and efficient. It is possible to prevent the weed from scattering or falling and becoming dirty, and the result of the work by the mowing is also excellent.

Description

Safety cutter for lawn mower {

[0001] The present invention relates to a cutter for use in a lawn mowing machine capable of cutting grass and weeds quickly, and more particularly, to a cutter having a rotary shaft, And a separate induction cover is coupled to the upper and lower portions of the chain. Thus, the chain is rotated at a high speed from driving of the engine, and at the same time, the chain passes through the induction groove of the induction cover Weeds and the like are cut quickly by the blade so that the use is very safe and the mowing work surface is clean and uniform so that the working effect is improved even further.

Generally, the lawn mowing machine refers to a mechanical device that allows the blades of the main pipe end to be rotated at a high speed from the power of the engine so that grass or weeds around the blade can be cut quickly.

In such a lawn mowing machine, an engine is usually mounted on the rear side of the backrest frame. A flexible cable and a main pipe are connected to the driving and rotating part of the engine. A gear case having a rotation shaft is coupled to the end of the main pipe It is.

Therefore, after a cutter such as a blade or a cutting wire such as a rope or a chain is coupled to the rotary shaft in the gear case as described above, the power of the engine is transmitted to the cutter through the rotary shaft, A wide range of grass or weeds can be quickly cut by the cutter.

These lawn mowers are very popular because a small number of workers can lay a wide range and range of lawn mowers, and the work efficiency is excellent, which is a trend that is widely used in general farmhouses, where mowing work such as government offices and homes is required to be.

However, since the cutter blade for lawn mowers as described above is rotated at a high speed and cuts weeds and the like around the lawn mowers, it is necessary to pay attention to the work. In the course of the rotation of the cutter blade, It is a fact that the safety of the workers is constantly threatened by the rising of the stones.

As a result, the workers are putting on various safety gears such as wearing goggles and protective gears, and they are working on the mowing work. However, since these safety gears are relatively expensive and hinder the mowing work, There is a problem that the lawn mower is used without wearing the safety gear of.

In addition, even when the above-mentioned safety gear is worn, a cutter blade that rotates at a high speed in a place where a slope, an uneven floor, or a stone, wood, Safety accidents are continuously increasing as the supply and frequency of lawn mowers such as a large accident occur when a worker slips or falls.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems described above, and it is an object of the present invention to provide an apparatus and a method for controlling a driving sprocket and a driven sprocket which are rotatably fixed to an upper fixed plate and a lower fixed plate via separate chains, A safety cutter in which an induction groove repeatedly formed to expose an electric blade is repeatedly formed on the chain, and the safety cutter is connected to the rotary shaft of the lawn mower As far as possible,

The present invention provides a safety cutter for a lawn mower which can quickly and effectively be cut by a cutting action of a blade and an induction cover when the chain and the blade are rotated through power transmission of a lawn mower engine and a weed entering into an induction groove of the induction cover at the same time, There is a purpose of.

According to an aspect of the present invention, there is provided a sprocket for a vehicle, comprising: a drive sprocket and a driven sprocket rotatable between an upper fixed plate and a lower fixed plate spaced apart from each other; And a guide groove is formed in the driving sprocket so as to insert a rotary shaft of the grass cutter. The blade is repeatedly fixed and formed on the chain, As the repeated induction grooves are formed,

The chain is rotated as the rotary shaft is rotated by receiving the power from the engine of the lawnmower and the blade fixed to the chain is moved in the guide groove of the guide cover to cut the weeds flowing into the guide groove.

The present invention is very safe because the blade for cutting and removing weeds is not protruded to the outside, and relatively simple and safe work can be performed even in a place having many gravel or uneven floor, It has a form that cuts the weed directly like a scissor instead of forcing the weed to be cut by the rotating blade-type blade, so it is possible to perform effective mowing work even at low speed operation of the mowing machine engine, It is possible to prevent the weed, which is cut at the time of work, from splashing or falling down and becoming dirty, and the work result by the mowing is also excellent.

1 is an overall perspective view of a safety cutter for lawn mowers according to the present invention;
Fig. 2 is a perspective view of a protective cover of a safety cutter for lawn mowers according to the present invention.
3 is an exploded perspective view of a safety cutter for lawn mowers according to the present invention.
Fig. 4 is a view showing an example of the combined use of the safety cutter for lawn mowers according to the present invention
5 is a view illustrating an example of using a safety cutter for lawn mowers according to the present invention
Fig. 6 is a detailed view of cutting action of the safety cutter for lawn mowers according to the present invention
7 is a perspective view showing another embodiment of the blade of the safety cutter for lawn mowers according to the present invention

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor may properly define the concept of the term to describe its invention in the best possible way And should be construed in accordance with the principles and meanings and concepts consistent with the technical idea of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a safety cutter for lawn mowers according to the present invention, FIG. 2 is a perspective view of a protective cover of a safety cutter for lawn mowers according to the present invention, and FIG. 3 is an exploded perspective view of a safety cutter for lawn mowers according to the present invention .

As shown in the drawings, the safety cutter for lawn mowers according to the present invention is composed of a chain type blade which is rotated by receiving rotational power from an engine of a lawn mowing machine, and an induction cover for cutting the blade in a scissor shape. The weed cutting is performed not by forced cutting of the weeds by the high-speed blade-type blades but by the blade and the protective cover.

The safety cutter for a lawn mower according to the present invention has an upper fixed plate 10 and a lower fixed plate 11 which are vertically spaced apart from each other and are arranged between the upper fixed plate 10 and the lower fixed plate 11 in the horizontal direction The drive sprocket 20 and the driven sprocket 21 are rotatably fixed to each other by a separate chain 30 so that the drive sprocket 20 and the driven sprocket 21 are connected to each other .

The blades 31 and 31 'that are outwardly protruded are repeatedly fixed to the chain 30. The blades 31 and 31' are fixed to the upper and lower fixing plates 10 and 10 ' 11, respectively.

The driving sprocket 20 and the driven sprocket 21 connected to each other by the chain 30 are seated between the upper and lower fixing plates 10 and 11 as described above and then the upper and lower fixing plates 10, The driving sprocket 20 and the driven scroll kit 21 are fixed to each other using a bearing device or the like regardless of the upper fixed plate 10 and the lower fixed plate 11 So that free rotation can be achieved.

Particularly, the driving sprocket 20 is an object directly receiving the power of the lawnmower engine. In the driving sprocket 20, a coupling groove 22 is vertically formed, and the coupling groove 22 are formed in the shape of a spline groove corresponding to the rotation axis of the lawn mowers so that the rotation spindle 20 can be rotated by receiving the rotational force of the rotation axis as it is.

The induction covers 40 and 40 'are respectively coupled to the upper and lower surfaces of the upper and lower fixing plates 10 and 11 as described above. Has a width and a length such that the blades 31 and 31 'do not protrude from the outer ends of the induction covers 40 and 40'. On the side ends of the induction covers 40 and 40 ' And the guide grooves 41 and 41 'formed repeatedly.

At this time, the guide grooves 41 and 41 'may be formed of a triangular-shaped repetitive grooves and may be formed as repeated groove grooves, and if necessary, The guide grooves 41 and 41 'of the various shapes can move in the direction of the guide grooves 41 and 41' by moving the blades 31 and 31 ' It is necessary to have sufficient depth and width to be exposed in the inside.

The guide covers 40 and 40 'that are vertically disposed may be fixed to the upper and lower fixing plates 10 and 11. The guide covers 40 and 40' Spacers (not shown in the figure) of various heights are inserted between the fixing plate 10 and the lower fixing plate 11 to adjust the spacing height to the upper and lower guide covers 40 and 40 ' It can be done.

A through hole (not shown in the drawings) for exposing the coupling groove 22 of the electric drive sprocket 20 should be formed in the induction cover 40 or 40 ' will be.

The supporting base 50 is hinged to the upper surface of the induction cover 40 and the supporting base 50 is hinge-coupled to the upper surface of the induction cover 40 located on the upper side. A fastener 51 having an inner circular insertion portion is hinged from the supporter 50 and the safety cutter of the present invention is attached to the end of the grass cutter 51 by using the supporter 50 and the fastener 51 as described above. So that they can be firmly and stably assembled and fastened to the main pipe.

The safety cutter for a lawn mower according to the present invention can be mounted on a main pipe 100 of a lawn mower as shown in Fig. 4. The lawn mower laid in a gear case formed in the lower end of the main pipe 100, So that various types of cutters coupled to the rotary shaft 101 can be rotated as the rotary shaft 101 is rotated at high speed by being transmitted to the rotary shaft 101,

The safety cutter of the present invention is coupled to the rotation shaft 101 as described above so that the rotation shaft 101 is inserted into the engagement groove 22 of the drive sprocket 20 exposed on the upper guide cover 40 (Not shown in the drawing) is firmly fixed to the rotary shaft 101 of the lawn mower protruding from the bottom surface of the lower guide cover 40 in the state of the present invention, The safety cutter can be fastened.

The supporting base 50 hinged on the upper guide cover 40 can be firmly coupled and fixed to the main pipe 100 so that the main pipe 100 100 of the safety cutter according to the present invention, and it is possible to prevent uneven mowing work due to deflection of the end of the safety cutter.

5, when the safety cutter is moved from the worker to the left and right in a state where the grip of the main pipe is grasped as shown in FIG. 5, the weeds are guided by the guide covers 40 and 40 ' The weeds in the state in which they enter the inside of the induction grooves 41 and 41 'formed in the guide grooves 41 and 41' are moved to the inside of the guide grooves 41 and 41 ' As shown in FIG.

6, when the worker moves the safety cutter in the left and right directions with the rotational force applied to the safety cutter of the present invention, the weeds and the like are guided by the guide grooves 41 (41 And the blades 31 and 31 'moving in a linear motion manner in the guide grooves 41 and 41' are moved inwardly in the guide grooves 41 and 41 ' The cut weeds will not be scattered but will be handed over to the rear side of the induction covers 40 and 40 'as they are.

The blades 31 and 31 'may be formed in a triangular or square shape on a plane, but more preferably, the blades 31 and 31' may be formed in a planar shape with a vertical blade portion 31a formed along the rotation direction of the chain 30, (31b) so as to maximize the resistance against weeds between the vertical blade (31a) and the guide grooves (41) and (41 ') so that the weed can be easily cut as if it is cut with scissors. As shown in FIG. 7, the vertical blade portion 31a may be provided with an inversely-curved portion 31c opposite to the rotation direction of the chain 30 so that the blade 31 and 31 ' 41) The weeds in (41 ') may be configured so that they are all cut completely without being pushed outward in the cutting process.

Therefore, not only the conventional lawnmower is operated at a high speed but the cutting action by the shape of scissors between the blade 31 (31 ') and the guide grooves 41 (41') is performed even at a relatively low speed operation It is possible to perform an effective mowing operation while performing various variable operations of the length of the safety cutter of the present invention.

In addition, since cutting and cutting with scissors is performed instead of forcibly cutting grass or weeds, the cutting surface is very clean and constant, and the operation result is very excellent, and the blades 31 and 31 ' So that it is possible to ensure safety of the operator.

Particularly, by changing the shape, width, and size of the guide cover 40 (40 ') with respect to the guide groove 41 (41'), various kinds of weeds or mowers In case that the rotational speed of the chain 30 is applied at a very high speed, the branches can be gradually broken while being cut, so that the usability is also excellent.

Further, the safety cutter of the present invention is easy to assemble and detach from the induction covers 40 and 40 ', and it is not difficult to replace the inner chain 30, so that the user can directly and easily replace the safety cutter when they are broken or damaged. The induction covers 40 and 40 'having the different shapes and sizes and the chain 30 can be appropriately replaced and assembled according to the shape and properties of the objects to be laid, It is possible.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the present invention as defined by the appended claims. Examples should be understood.

10: upper fixing plate 11: lower fixing plate
20: drive sprocket 21: driven sprocket
22: fastening groove
30: chain 31, 31 ': blade
40, 40 ': guide cover 41, 41': guide groove
50: support base 51: fastener
100: main pipe 101: rotating shaft

Claims

A drive sprocket 20 and a driven sprocket 21 rotatable between an upper fixed plate 10 and a lower fixed plate 11 spaced apart from each other are connected and formed by a chain 30 and the upper fixed plate 10 ) And the lower fixing plate 11 are respectively formed with upper and lower induction covers 40 and 40 '
The driving sprocket 20 is provided with a coupling groove 22 through which a rotating shaft of a lawn mower is inserted. The blades 31 and 31 'are repeatedly fixed to the chain 30, As the cover 40 (40 ') is formed with the repeated guide grooves 41 (41'),
The chain 30 is rotated as the rotary shaft is rotated by receiving the power from the engine of the lawnmower and the blades 31 and 31 'fixed to the chain 30 are guided by the guide grooves 41 ) 41 'so as to cut off the weeds flowing into the guide grooves (41, 41').

The method according to claim 1,
A support base 50 fastened to the main pipe of the lawn mower and a fastening tool 51 fastened to the front end of the support base 50 are hingedly formed on the upper portion of the guide cover 40 on the upper side. cutter.

The method according to claim 1,
Wherein the blade (31) (31 ') comprises a vertical blade (31a) and an inclined portion (31b) facing the rotating direction of the chain (30).

The method of claim 3,
Characterized in that the vertical blade (31a) is further formed with an inverted mirror portion (31c) having a slope opposite to the rotation direction of the chain (30).