KR20120105241A

KR20120105241A - Grass eliminator

Info

Publication number: KR20120105241A
Application number: KR1020110022937A
Authority: KR
Inventors: 김찬식
Original assignee: 김찬식
Priority date: 2011-03-15
Filing date: 2011-03-15
Publication date: 2012-09-25

Abstract

The present invention relates to a structure of a two-stroke engine applied to the lawn mower.
According to an embodiment of the present invention, an engine for generating power by burning fuel in a combustion chamber, a rotor for rotating the power of the engine, and a rotational force generated by the rotor are controlled to be transmitted to a cutter blade according to a user's selection. In the lawn mower comprising a clutch, a body pipe that can be gripped by the user by hand to control the work position and direction, and a cutter blade that rotates with the rotational force transmitted through the body pipe, the exhaust hole is formed on one side of the engine At least one exhaust hole is formed.
According to an embodiment of the present invention having such a configuration, while maintaining the same cross-sectional area of the exhaust hole formed in the engine block to at least two places to provide a lawnmower reduced exhaust pressure by reducing the exhaust pressure.

Description

Grass cutter {Grass eliminator}

The present invention relates to a lawn mower, and more particularly, to reduce exhaust pressure of the exhaust gas discharged by forming the exhaust hole formed in the two-stroke engine applied to the lawn mower in two or more places while maintaining the same cross-sectional area. A mower having an engine structure that reduces noise.

In general, weeds growing between the rice paddies and fields are likely to become hotbeds of pests, so they must be cut several times a year. Cutting of weeds is typically a very difficult task and therefore various automatic weed mowers have been proposed and used.

As the industry develops and human civilization develops, the human life becomes richer and pursuit of a more comfortable life. Accordingly, humans have developed the tools that are essential for life in order to enjoy a more comfortable life.

In line with this, the lawnmower was developed by cutting the blades with the rotation of the engine, which improved the old scythe, which was necessary in the rural area, in a more convenient and efficient way.

Generally, a mower is a type of mower that is attached to a back and is used. The attached engine mower generates a lot of vibration in the engine during operation, and the vibration is transmitted to the hand and wrist of the worker through the handle.

Therefore, this vibration has a big problem that causes the aftereffects of work to the user. In particular, the attached engine mower uses a motorcycle two-stroke engine, and the vibration caused by the reciprocating motion places a heavy load on the worker.

In addition, in the case of a strapped engine mower, heat generated in the engine is transferred to the body pipe, etc., thereby causing a user to feel uncomfortable.

In addition, there is a problem that a lot of worker's health is damaged by the smoke emitted from the engine. In addition, in order to avoid soot, it is common to change the direction of the wind blowing while causing injury to nearby workers or unwanted bees.

In addition, until now, mowing plants have been developed to achieve only the purpose of cutting grass, and there is no consideration for the user. In addition to the heat caused by weather and weather as well as the heat caused by the engine heat, the user was easily tired and sweated on his back, and a sweat band was formed, which caused a decrease in work efficiency.

On the other hand, the engine used for the mower is generally a two-stroke cycle engine. Therefore, there is a problem that damages the hearing of the worker and noise damage to the surrounding environment due to loud noise during work.

An object of the present embodiment relates to an engine structure of a lawnmower, which can protect an operator's working environment and hearing by providing an engine structure that reduces engine noise of a lawnmower to which a two-stroke cycle engine is applied.

The mower according to the embodiment for achieving the above object, the engine for generating power by burning fuel in the combustion chamber, the rotor for rotating the power of the engine, and the rotational force generated by the rotor to the user's selection According to the lawn mower comprising a clutch for controlling the transmission to the cutter blade, a body pipe that can be controlled by the user to control the work position and direction, and a cutter blade that rotates with the rotational force transmitted through the body pipe, An exhaust hole is formed in one side of the engine, and the exhaust hole is characterized in that formed at least one.

In addition, the exhaust hole is formed in a rectangular shape, characterized in that formed in two places symmetrically up and down each other.

The sum of the cross-sectional areas of the exhaust holes formed at two locations is the same as that of the existing exhaust holes.

Further, due to the exhaust hole divided into two places, exhaust noise is reduced due to the low pressure by dividing the discharge pressure of the exhaust gas discharged into two places.

In addition, the exhaust hole is characterized by being divided into three or more places.

According to this proposed embodiment, the lawn mower having the engine structure according to the embodiment of the present invention includes an engine having a structure for reducing noise, thereby reducing the noise during the use of the operator to improve the working environment due to the noise, Has the advantage of protecting workers' hearing.

1 is a perspective view of a lawn mower according to an embodiment of the present invention.
2 is a perspective view showing the configuration of the lawn mower according to the embodiment of the present invention.
3 is a perspective view showing the configuration of a lawn mower according to another embodiment of the present invention.
Figure 4 is a perspective view showing the structure of the engine of the lawn mower according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It should be understood, however, that there is no intention to limit the scope of the present invention to the embodiment shown, and that other embodiments falling within the scope of the present invention may be easily devised by adding, Can be proposed.

1 is a perspective view of a lawn mower according to an embodiment of the present invention.

On the other hand, weed cutter blades are powered by bevel gears. In the bevel gear, a drive shaft inside the body pipe transmits power. The body pipe is provided with a handle. An engine is connected to the rear end of the body pipe. The engine provides power for driving the cutter blade, and is used by a user wearing a shoulder.

However, such a sticking engine mower generates a lot of vibration in the engine during operation, and the vibration is transmitted to the hand and wrist of the worker through the handle. Therefore, this vibration has a big problem that causes the aftereffects of work to the user. In particular, the attached engine mower uses a motorcycle two-stroke engine, and the vibration caused by the reciprocating motion places a heavy load on the worker.

2 is a perspective view showing the configuration of the lawn mower according to the embodiment of the present invention.

3 is a perspective view showing the configuration of a lawn mower according to another embodiment of the present invention.

Looking at, after the power of the engine 31 passes through the clutch 23, it is flexible

The cable 21 is transmitted to the rotating shaft inside the body pipe 12. Bevel gear 11 is provided at the end of the rotation shaft.

In the bevel gear 11, the power of the engine 31 is transmitted to the cutter blade 10 while the power transmission direction is changed.

In the drawings, reference numeral 14 denotes a throttle lever, 15 grips, 16 joint pipes, 32 fuel tanks, 40 a backrest, 41 a frame, and 42 a shoulder band.

Since the engine 31 is located behind the user's back, the detachable engine lawn mower can use a relatively large output due to less soot and vibration than the shoulder type.

However, since the engine mower uses a centrifugal clutch, the engine needs to be raised to a certain speed before the blade starts to rotate and the engine's output must be rotated at a fairly high speed in order to transmit a working torque to the blade.

According to a feature of the present invention for achieving the above object, the present invention is an engine for generating a rotational force by the combustion of the fuel in the combustion chamber, the direct current generator for generating a DC power by the rotational force of the engine, A drive pipe driven by a DC power generated by the DC generator and driven on / off by a drive switch, a body pipe provided with one end of the drive motor and a handle that can be held by a user, and the body pipe A cutter blade installed at the front end of the cutter blade to receive the driving force of the driving motor and to transmit power generated from the DC generator to the driving motor, and having a predetermined length to control the distance between the engine and the driving motor. It is configured to include.

Power generated by the DC generator is transferred to the driving motor via a capacitor.

The driving force of the drive motor is transmitted to the cutter blade through a rotating shaft penetrating the inside of the body pipe, and one side is installed at the tip of the rotating shaft and the other side of the bevel gear pair is installed on the cutter blade.

The engine is provided with a backrest or a carrier handle to perform the movement of the engine.

In the mower according to the present invention having the configuration as described above, there is no influence of heat and vibration generated from the engine while using the engine, and the mower is operated by driving the motor by transmitting electricity generated from the engine, so that the relative position between the engine and the cutter blade is adjusted. It can be freely adjusted, the on-off operation of the cutter blade is fast, there is an advantage that the operation of the lawn mower is convenient.

In detail, the body pipe 100 is long and empty inside. The rear end of the body pipe 100 is provided with a first handle (102). The first handle 102 is a portion that a user generally holds with his right hand (when right-handed).

The driving switch 104 is provided at a position adjacent to the first handle 102 so that the user can turn on and off the driving motor 108 to be described below while holding the first handle 102.

The second handle 106 is provided at a position moved from the middle portion of the body pipe 100 toward the rear end portion. The second handle 106 is generally a left handed portion. By moving the hand holding the second handle 106 to the left and right, the cutter blade 114 to be described below provided on the front end of the body pipe 100 can cut the weeds.

A driving motor 108 is provided at the rear end of the body pipe 100. The drive motor 108 may be operated by the supply of DC power as a DC motor. The driving of the driving motor 108 is by the power delivered from the engine 120 side to be described below or by the power delivered from the rechargeable battery.

The rotating shaft 110 is provided inside the body pipe 100. The rotation shaft 110 is driven by the drive motor 108. A pair of bevel gears 112 are provided at the tip of the rotary shaft 110 at a position corresponding to the tip of the body pipe 100.

That is, one each of the front end of the rotary shaft 110 and the cutter blade 114 described below. The bevel gear 112 transfers the power of the rotating shaft 110 in a different direction.

A cutter blade 114 is installed at the front end of the body pipe 100 to be driven by the bevel gear 112. The cutter blade 114 is a portion that actually cuts the weeds while being rotated by the driving force of the driving motor 108. A safety cover 116 is provided at the front end of the body pipe 100. The safety cover 116 shields the latter half of the rotation area of the cutter blade 114 to prevent foreign substances such as stones from splashing toward the user.

The engine 120 burns fuel in the combustion chamber to generate rotational force with the force. One side of the engine 120 is provided with a fuel tank 122. The output shaft of the engine 120 is integrally rotated with the rotation shaft of the DC generator 130.

That is, the DC generator 130 is driven by the driving force of the engine 120 to generate a DC power. As the DC generator 130, a DC motor may be used.

Power generated by the DC generator 130 is transferred to the capacitor 132. The capacitor 132 serves to compensate for the inconsistency of the power generated by the DC generator 130 because the engine 120 has different rotational forces in the intake stroke and in the explosion stroke.

The capacitor 132 is provided with a plurality connected in parallel. On the other hand, the power generated by the DC generator 130 is transmitted to the drive motor 108 through the connection line 140. The connection line 140 is formed to be relatively long in length so that the weed can be cut far from the position where the engine 120 is placed.

The length of the connection line 140 may vary depending on the needs of the user.

In addition, the backrest 150 is installed in the engine 120 to facilitate the movement of the engine 120. Therefore, the engine 120 and the DC generator 130 may be moved in a state of being worn by the user.

For reference, weeds and the like may be caught in the cutter blade 114 and may not rotate. In such a case, a large load is applied to the driving motor 108, and the driving motor 108 requires a lot of power. In this case, a severe situation may occur until the operation of the engine 120 stops. In this case, a separate protection circuit is formed on a substrate for driving the driving motor 108 to cut off the electrical connection with the DC generator 130 when a large load is applied to the driving motor 108. can do.

4 is a perspective view showing the structure of the engine of the lawn mower according to the embodiment of the present invention.

Looking at the exhaust hole is formed on one side of the engine, one or more exhaust holes are formed.

In detail, the exhaust hole is formed in a rectangular shape, and is formed in two places symmetrically with each other, and the sum of the cross-sectional areas of the exhaust holes formed at two places is the same as that of the existing exhaust hole.

Therefore, due to the exhaust holes divided into two places, the exhaust noise of the exhaust gas is reduced by dividing the discharge pressure of the exhaust gas into two places, thereby reducing the exhaust noise.

As another embodiment, the exhaust hole may be formed by dividing into three or more places.

That is, the number of the exhaust holes is formed to be three or more, and the cross-sectional area of the exhaust holes is kept the same as that of the existing exhaust holes.

Due to the structure as described above, by dividing the discharge pressure discharged through the exhaust hole in three or more stages, the exhaust noise is reduced by contacting the atmosphere at low pressure.

* Brief description of the main drawing codes
100: body pipe 102: first handle
104: drive switch 106: second handle
108: drive motor 110: rotating shaft
112: bevel gear 114: cutter blade
116: safety cover 120: engine
122: fuel tank 130: DC generator
132: condenser 140: connecting line
150: back 150 ': carrier handle

Claims

An engine that generates power by burning fuel inside the combustion chamber;
A rotor for rotating the power of the engine,
A clutch for controlling whether the rotor generates the rotational force to be transmitted to the cutter blade according to a user's selection;
Body pipe which can control the working position and direction by holding by user,
In the mower comprising a cutter blade for rotating with the rotational force transmitted through the body pipe,
Mowers are formed on one side of the engine, characterized in that at least one exhaust hole formed.

The method of claim 1,
The exhaust hole is formed in a rectangular shape, the lawn mower characterized in that formed in two places symmetrical with each other.

The method of claim 2,
The sum of the cross-sectional area of the said exhaust hole formed in two places is the same as that of the existing exhaust hole.

The method of claim 2,
The lawnmower is characterized in that the exhaust noise is reduced due to the low pressure by dividing the discharge pressure of the exhaust gas discharged into two places due to the exhaust hole divided into two places.

The method of claim 2,
The mower is formed by dividing the exhaust hole into three or more places.