JPH0439400Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an operating device for a small portable engine, and more specifically, to a device for operating a small portable engine, which can be used to control a brush cutter. This invention relates to a portable small engine operating device which is attached to a flexible tube together with a throttle lever and is attached to a main body, and the throttle lever and starter button can be operated in conjunction with each other to improve usability.

Prior Art The starting lever for conventional small portable engines was attached to the carburetor of the internal combustion engine, so it was impossible to operate the lever when the operator was carrying the brush cutter on his or her back. Ta. That is, this choke lever is attached to the carburetor on the intake side of the portable engine carried by the worker on his or her back. Therefore, when starting the engine, the operator cannot reach the position of the choke lever, so the operator has to lower the engine and perform the starting operation.

Problems to be Solved by the Invention In such prior art, when cold starting an engine equipped with an electric starter, it is necessary to activate the starter switch while operating a manual choke lever. However, in small portable engines, etc., the above operations must be performed with one hand. At this time, the choke lever and starter switch cannot be operated at the same time, and since the choke lever is too long, a large amount of fuel may be drawn into the combustion chamber, causing the spark plug to fog up and making it difficult to start the engine.

Furthermore, when carrying an engine-equipped work machine on the back, the starter switch is within easy reach while carrying the machine on the back, but the starter switch that controls the fuel for starting the carburetor is out of reach of the worker. Therefore, the engine cannot be started.

The purpose of this invention is to solve the above technical problems,
An object of the present invention is to provide a portable small-sized engine operating device with excellent usability.

Means for Solving the Problems The present invention is a portable small engine operating device that includes a longitudinal body 13 connected to a portable small engine 2 and an operating device 1 attached to a midway position of the longitudinal body 13. The operating device 1 has a roughly L-shaped bent lever 15 rotatably supported by a pin 14 on the operating device main body 10 . A yoke operating portion 15e that protrudes outward
and an arm 15b extending into the operating device main body 10, an end of a wire 17 of a yoke extending along the longitudinal body 13 is connected to the arm 15b, and a free end of the yoke operating portion 15e is connected to the arm 15b. , a protrusion 20 protruding toward the operating device main body 10 side is formed, and a spring 37 that biases the operating device main body 10 in the direction in which the operating device main body 10 is disposed is engaged with a spring 37 that biases the operating device main body 10 in the direction in which the operating device main body 10 opens. pin 14
A roughly L-shaped throttle lever 16 is rotatably supported on the throttle lever 16.
has a throttle operating section 16e extending outward from the operating device main body 10, and an arm 16b extending into the operating device main body 10, and a free end of the arm 16b is connected to a throttle wire 25 extending along the longitudinal body 13. The operating device main body 10 includes a switch that is connected to the operating device body 10 when the operating section 15e of the operating device 15 is pressed.
Starter button 22 pressed by protrusion 20 of No. 5
is fixed, and the starter motor of the portable small engine 2 is driven when the starter button 22 is pressed.

Function According to the present invention, the choke lever, which is operated when starting a portable small engine, is attached to the flexible tube for controlling the brush cutter, and the throttle lever is attached to the mounting body thereof, and the choke lever and the starter button are connected to each other. , which enabled linked operations.

Therefore, the check lever and starter switch button can be operated with one hand, and the check lever automatically returns when the operator releases his or her finger, which prevents the spark plug from blowing up and improves usability.

Embodiment FIG. 1 is a cross-sectional view of a portable small engine operating device according to an embodiment of the present invention, and FIG. 2 is a perspective view of a brush cutter 3 equipped with a portable small engine and a cutting blade 30. It is implemented in connection with a brush cutter 3 having a portable small engine as shown in FIG. Brush cutter 3
Basically, the engine 2, a fuel tank 45 on the upper part of the engine 2, a back support part 41 for the worker to carry on his or her back, a belt 43 thereof, a cutting blade 30,
Drive shaft 32 for driving this cutting blade
, a longitudinal body 13 which is a flexible tube through which the drive shaft 32 is inserted to operate the cutting blade, and an operating device 1 mounted on the longitudinal body for starting the engine 2. .

FIG. 3 shows the cutting plane line of the operating device 1 in FIG.
4 is a plan view of FIG. 1, and FIG. 5 is a sectional view of the throttle lever 16 of FIG.
FIG. The main body 10 of the operating device 1 surrounds the longitudinal body 13 in half with a mounting bracket 11 shown in FIG. 3, and is fixed with bolts 35, 35. The main body 10 includes a chiyoke lever 15 bent into a roughly L-shape by a pin 14 having an axis perpendicular to the axis of the longitudinal body 13;
Throttle lever 16 bent into a roughly L shape
and are each pivotably supported for angular displacement. As shown in FIGS. 3 and 4, the inner diameter of the coil of the torsion spring 37 is pivotally supported by the pin 14, and one end of the torsion spring 37 is latched to the chain lever 15 and the other end to the main body 10. . This torsion spring always biases the check lever 15 counterclockwise in FIG. 1 in the direction in which the check valve opens.
The hinge lever 15 is attached to a bent portion 15d of the main body 10 by a pin 14 above the longitudinal body 13.
is supported from the bent portion 15d to the main body 1.
0 and an arm 15b extending from the bent portion 15d within the main body 10.
The end of the inner wire 17 of the yoke extending along the longitudinal body 13 is connected to this arm 15b, and the yoke operation part 15e extends at an angle toward the operator as it becomes its free end. . The inner wire 17 of the cable yoke is inserted into the outer cable 18. One end of the outer cable 18 is fixed to the main body 10. inner wire 1
7 is connected to a lever (not shown) of a choke valve of a carburetor of the engine 2. Inner wire 17
1 is pulled to the left in FIG. 1, the intake amount of air to act in the closing direction of the choke valve of the carburetor decreases, and the air-fuel ratio of the fuel decreases. Therefore, when the engine is cold started, the plug is easily ignited and the engine is started easily.

A protrusion 20 that protrudes toward the main body 10 is formed at the free end of the operating portion 15e of the choke lever 15. The arm 15b is attached to the 15c shown by the imaginary line in FIG.
Rotate it until it reaches the position of
When e is angularly displaced to 15a in the direction in which the inner wire 17 of the chain yoke is pulled, the protrusion 20 comes into contact with the pressing part 23 at the top of the starter button 22 fixed on the main body 10, and this pressing The portion 23 can be pressed.

A flexible electric wire 24 is connected to the starter button 22 . The flexible electric wire 24 is connected to a starter motor (not shown) in order to start the engine 2, and the starter motor is driven by pressing the pressing part 23 of the starter button 22 to make the starter button 22 conductive. , engine 2 is started.

A throttle lever 16 is also pivotally supported on the pin 14 so as to be angularly displaceable, as shown in FIG. The throttle lever 16 has a roughly L-shaped bent portion 16d supported by the main body 10 by a pin 14, and is located on the opposite side of the throttle lever 16 from the operator. Throttle operating portion 16e extending outward from 10
and an arm 16b extending from the bent portion 16d within the main body 10. The throttle operation section 16e is
The free end portion extends in a direction closer to the operator. The free end of the arm 16b of the throttle lever 16 is fixed to one end of a throttle inner wire 25 extending along the longitudinal body 13 of the engine 2, and the throttle inner wire 25 is inserted into the throttle outer wire 26. do.

The end of the throttle outer wire 26 is connected to the main body 10.
Fixed. The other end of the throttle inner wire 25 is connected to a throttle valve (not shown) of the engine 2. When the throttle lever 16 is operated to angularly displace the throttle inner wire 25 in the direction in which it is pulled, the opening degree of the throttle valve increases. As shown in FIG. 5, when the operating portion 16e of the throttle lever 16 is angularly displaced to 16a, the arm 16b integrated with this lever 16 is angularly displaced to the position 16c and pulls the throttle inner wire 25. Operates in the direction.

When starting the internal combustion engine, the check lever 15 is angularly displaced clockwise in FIG. 1 to the lever position 15a, and as shown in the partial perspective view of the used state in FIG. The starter is driven by pressing the pressing part 23 of the starter button 22, and high concentration fuel with a low air-fuel ratio is supplied to the engine by the action of a choke valve (not shown), making it easy to start the engine 2. Can be started. After the engine 2 has started, by releasing the finger on the throttle lever 15, the engine can be operated by the action of a torsion spring installed between the engine lever 15 and the main body 10 surrounding the pin 14, or by the engine wire. Under the action of a spring for a check valve (not shown) attached to the other end of the check lever 17, the check lever 15 is angularly displaced and returned in the counterclockwise direction in FIG. As a result, the starter motor is deenergized and the opening degree of the choke valve is increased.

When operating engine 2, throttle lever 1
The rotational speed of the rotary blade 30 of the brush cutter 3 can be adjusted by the engine 2 by angularly displacing the blade 6.

When operating such an engine 2, the operation parts 15e and 16e of the throttle lever 15 and the throttle lever 16 extend in a direction toward the operator as they become free ends. Since it is disposed on the opposite side of the operator from the jaw lever 15, it can be easily operated with one hand, and moreover, with only the thumb. Furthermore, since the throttle lever 16 is configured to operate independently of the choke lever 15, its action is not controlled or limited by the choke lever 15.

The present invention is applicable not only to the brush cutter shown in the embodiment in which the engine is supported on the back, but also to the rod-type brush cutter in which a small engine is attached to the end of the longitudinal body opposite to the cutting blade.
It can also be applied to operating devices attached to small engines of other working machines.

Effects As described above, according to the present invention, the check lever and the starter button can be operated simultaneously with one hand, and when the pressure with one hand is released, the check lever automatically returns to its original position and the check yoke opens. Highly concentrated fuel is no longer supplied to the engine, and spark plug fogging is prevented.

Although the throttle lever is installed in parallel with the throttle lever, it can be operated independently of the throttle lever, and the throttle valve can be opened and closed with one thumb during operation, making it extremely easy to operate.

As described above, the operating device of the present invention is superior in usability, and a working machine equipped with this operating device can achieve high working efficiency.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a portable small engine operating device according to an embodiment of the present invention, FIG. 2 is a perspective view of a brush cutter 3 equipped with a portable small engine cutting blade 30, and FIG.
The figure is a sectional view taken from the cutting plane line - of the operating device 1 in FIG. 2, FIG. 4 is a plan view of FIG. 1, FIG. The side sectional view and FIG. 6 are partial perspective views seen from the left side showing the state of use. DESCRIPTION OF SYMBOLS 1... Operating device, 2... Engine, 3... Brush cutter, 10... Main body, 15... Chiyoke lever, 1
6... Throttle lever, 22... Starter button,
23... Pressing part.

Claims (1)

[Claims for Utility Model Registration] Longitudinal body 13 connected to portable small engine 2
This is a portable small engine operating device which is assembled with an operating device 1 which is attached to a midway position of a longitudinal body 13. A lever 15 is rotatably supported by a pin 14, and the lever 15 is connected to a lever 15e that protrudes outward from the operating device main body 10.
and an arm 15b extending into the operating device main body 10, an end of a wire 17 of a yoke extending along the longitudinal body 13 is connected to the arm 15b, and a free end of the yoke operating portion 15e is connected to the arm 15b. , a protrusion 20 protruding toward the operating device main body 10 side is formed, and a spring 37 that biases the operating device main body 10 in the direction in which the operating device main body 10 is disposed is engaged with a spring 37 that biases the operating device main body 10 in the direction in which the operating device main body 10 opens. pin 14
A roughly L-shaped throttle lever 16 is rotatably supported on the throttle lever 16.
has a throttle operating section 16e extending outward from the operating device main body 10, and an arm 16b extending into the operating device main body 10, and a free end of the arm 16b is connected to a throttle wire 25 extending along the longitudinal body 13. The operating device main body 10 includes a switch that is connected to the operating device body 10 when the operating section 15e of the operating device 15 is pressed.
Starter button 22 pressed by protrusion 20 of No. 5
is fixed, and the starter motor of the portable small engine 2 is driven when the starter button 22 is pressed.