JP2521758Y2 - Governor for spark ignition engine - Google Patents

Description

[Detailed description of the invention] << Industrial application field >> The present invention relates to a governing device for a spark ignition type engine.
In particular, the present invention relates to a speed control device that remotely controls a speed control lever by a release wire.

<< Conventional Technology >> Generally, in a spark ignition type engine, a governor lever that swings according to the rotation of the engine is arranged outside the engine wall, and this governor lever is connected to a throttle valve operating shaft of a carburetor by an interlocking rod. At the same time, the other end of the governor spring, one end of which is engaged with the governor lever, is engaged with the governing lever which is swingably supported on the engine wall, and the rotation of the engine is adjusted by adjusting the tension of the governor spring. Make up.

When the speed control lever is remotely controlled using a release wire, the speed control lever is pivotally supported on the engine body via a speed adjustment plate, and the speed adjustment plate is attached to the outer wire holding portion of the release wire. However, since there are cases where the release wire is pulled out to the front of the engine and cases where it is pulled out to the back of the engine,
Conventionally, in the case of an engine in which the pull-out direction of the release wire is not specified, the outer wire holding portion is formed at two symmetrical positions of the speed adjusting plate, and the inner wire fixing portion is provided at a symmetrical position around the swing fulcrum of the speed control lever. Were formed in two places.

《Problem to be solved》 Since various devices, pipes, and wiring are complicated on the outer peripheral wall of the engine, it is desirable that the parts to be installed there be simple. If the holding portion is formed at two symmetrical positions on the speed adjusting plate, there is a problem that the outer wire holding portion on the unused side becomes an obstacle.

The present invention has been made focusing on such points.
An object of the present invention is to provide a speed adjusting device capable of changing the pull-out direction of the release wire back and forth while having only one holding portion for the outer wire.

<< Means for Solving the Problems >> In order to achieve the above object, the present invention relates to a speed control device for a spark ignition type engine configured to control a speed control lever with a release wire. At its center, it is swingably supported on the engine machine wall via a speed adjusting plate, and the outer wire holding portion of the release wire is formed on this speed adjusting plate. An engagement portion of the governor spring is formed at a symmetric position about the fulcrum, and an inner wire fixing portion of a release wire is formed at an arm portion of the speed control lever located on the side where the outer wire holding portion is provided. .

Further, in the invention described in claim 2, in the engine speed control device having the above-described structure, a return spring for urging the speed control lever toward the idling side is mounted between the speed control plate and the speed control lever. Features.

<< Operation >> In the present invention, the speed control lever is swingably supported at the center of the engine machine wall via a speed control plate, and an outer wire holding portion of a release wire is formed on the speed control plate. Governor spring engaging portions are formed at symmetrical positions around the lever swing fulcrum at both swinging tip portions of the lever, and the release wire is attached to the arm portion of the governing lever located on the side where the outer wire holding portion is provided. Since the inner wire fixing part is formed, the speed adjustment plate and the speed
It is possible to change the direction in which the release wire is led out simply by rotating the governor spring over the governor lever. Furthermore, since the governor spring engaging portion formed on the governing lever is formed at a symmetrical position with respect to the swinging fulcrum of the governing lever, the arm length up to the governor spring engaging portion and the inner wire fixing portion are not included. Since the arm length ratio to the arm length is the same regardless of which engaging portion the governor spring is locked to, the operation length of the release wire can be set to be the same.

Further, as described in claim 2, when the return spring is stretched between the speed control lever and the speed adjusting plate to urge the speed control lever toward the idling side, the speed control lever is caused by the resistance of the release wire itself. Even if it does not return sufficiently to the idling side, the speed adjusting lever can be returned to the idling position by the elastic force of the return spring.

<< Embodiment >> The drawings show an embodiment of the present invention, FIG. 1 is a front view of a main part taken out, and FIG. 2 is a front view of a fuel control system in a vertical spark discharge engine.

In this fuel control system, a governor lever (1) that swings in accordance with the rotation of the engine (E) is disposed outside a wall of the engine (E), and the governor lever (1) is operated by operating a throttle valve of a carburetor (2). The lever (3) is connected by an interlocking rod (4), and the governor spring (5), one end of which is engaged with the governor lever (1), is connected to the governing lever (6) swingingly supported on the engine machine wall. The rotation of the engine (E) is adjusted by adjusting the tension of the governor spring (5) by engaging and swinging the governing lever (6) with the release wire (7). I have.

As shown in FIG. 1, the speed control lever (6) has a central portion pivotally supported by the engine machine wall, and a speed adjusting plate is provided between the speed control lever (6) and the engine machine wall. (8) is arranged and fixed. An engagement hole (9) for a governor spring (5) is formed symmetrically with respect to the lever swing fulcrum (10) at both swing ends of the governing lever (1). A fixing portion (12) for fixing the inner wire (11) of the release wire (7) is formed on the arm portion, and a side edge of the central portion of the speed control lever (6) is bent to oscillate the region (13). Is formed.

On the other hand, the speed adjusting plate (8) has an outer wire holding portion (14) of one release wire (7) and a lever receiving portion (15) formed by bending one side edge of the adjusting plate (8). The lever receiving portion (15) is formed so as to face the swing region regulating portion (13) when the speed regulating lever (6) is arranged on the side where the outer wire holding portion (14) is formed. Idling position limit screw (16) on lever receiver (15)
And the high-speed rotation limiting screw (17) are screwed together with the speed control lever (6) sandwiching the swing fulcrum. The other side edge portion corresponding to the lever receiving portion (15) is bent to form a spring engaging portion (18), and the spring engaging portion (18) and the swing of the speed adjusting lever (6) are swung. A return spring (19) for urging the governing lever (6) to the idling side between the region regulating portion (13).
Is attached.

Reference numeral (20) in the figure denotes a holding portion for a choke valve operating release wire attached to the speed adjusting plate (8).

When the speed adjusting lever (6) and the speed adjusting plate (8) configured as described above are used, the elastic force of the governor spring (5) and the elastic force of the return spring (19) are adjusted by the speed adjusting lever (6).
Will be urged toward the idling rotation side. When the release wire (7) is loosened to operate the engine rotation to the idling position, the release wire (7) is pressed.
Even if there is resistance in the operation system, the speed adjusting lever (6) can be returned to the idling position by the elastic force of the return spring (19).

When the operation direction of the release wire (7) is changed, the governor spring (5) is fixed by changing the phase by 180 degrees with the speed adjusting lever (6) and the speed adjusting plate (8) assembled. The position of engagement with the speed control lever (6) is changed. Thus, the pull-out direction of the release wire (7) can be changed even if only one outer wire holding portion (14) is formed on the speed adjusting plate (8). Further, in this case, the engaging portion (9) of the governor spring (5) formed on the speed control lever (6) is formed at a symmetrical position about the swing fulcrum of the speed control lever (6). The arm length ratio between the arm length up to the spring engagement portion (9) and the arm length up to the inner wire fixing portion (12) is the same even if the governor spring (5) is locked to either engagement portion (9). Therefore, the operation length of the release wire (7) can be set to be the same.

<< Effect >> In the present invention, the speed control lever is swingably supported at the center portion of the engine machine wall via a speed control plate, and an outer wire holding portion of a release wire is formed on the speed control plate, thereby controlling the speed control. Governor spring engaging portions are formed at symmetrical positions around the lever swing fulcrum at both swinging tip portions of the lever, and the release wire is attached to the arm portion of the governing lever located on the side where the outer wire holding portion is provided. Since the inner wire fixing part is formed, the speed adjustment plate can be
The release direction of the release wire can be changed simply by rotating the governor spring over the governor spring. In addition, since the governor spring engaging portion formed on the governing lever is formed at a symmetrical position with respect to the swinging fulcrum of the governing lever, the arm length up to the governor spring engaging portion and the inner wire fixing portion are reduced. Since the arm length ratio to the arm length is the same regardless of which engaging portion the governor spring is locked to, the operation length of the release wire can be set to be the same.

Further, as described in claim 2, when the return spring is stretched between the speed control lever and the speed adjusting plate to urge the speed control lever toward the idling side, the speed control lever is caused by the resistance of the release wire itself. Even if it does not return sufficiently to the idling side, the speed adjusting lever can be returned to the idling position by the elastic force of the return spring.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a front view of a main part taken out, and FIG. 2 is a front view of a fuel control system in a vertical spark discharge engine. E ... Spark ignition engine, 1 ... Governor lever, 2 ...
Vaporizer, 3 ... Throttle valve operating lever, 4 ... Linking rod, 5 ... Governor spring, 6 ... Governing lever, 7
... release wire, 8 ... speed adjusting plate, 9 ... governor spring engaging portion, 10 ... swing fulcrum, 12 ... inner wire fixing portion, 14 ... outer wire holding portion, 19 ... return spring.

Claims (2)

(57) [Scope of request for utility model registration] 1. A governor lever (1) and a speed control lever (6) are swingably supported on a wall of a spark ignition engine (E), and the governor lever (1) and the speed control lever (6) are connected to each other by a governor. The governor lever (1) and the throttle valve operating lever (3) of the carburetor (2) are interlockedly connected by an interlocking rod (4), and the governing lever (6) is connected to the release wire ( In the speed control device for a spark ignition engine configured to perform the speed control operation in step 7), the speed control lever (6) is swingably supported on the engine wall at the center portion thereof via a speed control plate (8). At the same time, an outer wire holding portion (14) of a release wire (7) is formed on the speed adjusting plate (8), and a center of the lever swing fulcrum (10) is provided at both swinging tips of the speed control lever (6). Governor spring ( ), And an inner wire fixing portion (12) of a release wire (7) is formed on the arm portion of the speed control lever (6) located on the side where the outer wire holding portion (14) is provided. A speed governing device for a spark ignition type engine. 2. A spring according to claim 1, wherein a return spring (19) for urging the speed control lever (6) toward the idling side is stretched between the speed control plate (8) and the speed control lever (6). Governor for spark ignition engines.