JPS622274Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a frequency switching device for switching the output frequency of an engine generator.

Generally, in the case of frequency switching devices for engine generators, the advance angle of the advancer in the governor body is adjusted via the governor spring by the movement of the governor lever according to the 50Hz and 60Hz frequency switching positions of the operation knob. This allows the output frequency of the engine generator to be switched by advancing or retracting the ignition timing of the engine and changing the rotational speed.

However, with this type of frequency switching device for engine generators, it is unavoidable that assembly errors occur when transmitting the movement of the governor lever to the engine advancer via the governor spring, and therefore An adjustment mechanism is needed that allows stroke adjustment of the governor lever.

Conventional frequency switching devices for engine generators have only one system in which the adjustment mechanism adjusts at either the 50Hz or 60Hz frequency switching position, and once one frequency switching position is adjusted, The other frequency switching position is also determined relatively. However, with this type of adjustment mechanism, the governor lever, governor spring,
In addition, it has become impossible to correct the advance angle adjustment range, which varies due to variations in parts in the governor body.

The present invention was developed with these points in mind, and the adjustment of the switching position of one frequency does not affect the switching position of the other frequency in any way.
The present invention provides a frequency switching device for an engine generator in which adjustment of each frequency switching position of 60 Hz and 60 Hz can be performed independently and accurately.

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

In the frequency switching device for an engine generator according to the present invention, as shown in FIG. shaft 5
is slidably attached to the shaft 5, and a spring receiver 6 is integrally attached to the shaft 5.
A spring 7 is mounted between one side wall portion 2 and the other side wall portion 2 to press the shaft 5 in the direction of the other side wall portion 3 . Further, the operation knob 4 is rotatably attached to the shaft 5, and as shown in FIG. 9 is formed, and by rotating the operation knob 4, the protrusion 9 aligns with the inclined surface of the cam plate 8 and moves the shaft 5.
can be moved back and forth. A ball 11 into which a spring 10 is inserted is embedded in the projection 9, and when the operating knob 4 is switched to the 50Hz position and the 60Hz position, the ball 11 is inserted into the hole formed on the cam plate 8 side. I try to make it feel tighter and more clicky.
The cam plate 8 is provided with a stopper (not shown) that restricts the rotation of the operating knob 4 within a certain range, and when the protrusion 9 is located at the bottom of the inclined surface of the cam plate 8. The frequency is set at a position of 50 Hz, and the position at the top of the slope is set at a frequency of 60 Hz.

Further, a governor lever 12 is mounted on the board 1, and an auxiliary lever 13 is rotatably supported on the board 1 by a pin 14. As the shaft 5 moves, each lever 12,
13 is adapted to be rotated. In addition, the third
As shown in the figure, the guide pin 15 is connected to the auxiliary lever 1.
3. It is passed through the holes 16, 17, 18 drilled in the governor lever 12 and the board 1, respectively.
8 are elongated holes, respectively, to allow some play in the movement of the guide pin 15. In addition, a 60Hz adjustment screw 21 is attached to a seat 19 formed at one end of the auxiliary lever 13 via a spring 20, and by restraining one end of the governor lever 12 with the tip of the screw 21, the governor lever 12 can be assisted. Adjust the position relative to the lever 13 with the screw 21.
It is possible to make adjustments as appropriate depending on the advance or retreat of the vehicle. Furthermore, a seat 22 formed on the substrate 1 side
A 50Hz adjustment screw 23 is attached to the 50Hz adjustment screw 23 via a spring 20, and by restraining one end of the governor lever 12 with the tip of the screw 23, the position of the governor lever 12 with respect to the board 1 can be adjusted as appropriate by moving the screw 23 forward and backward. I'm trying to do that. Note that a governor spring 24 is connected to the other end of the governor lever 12.

Therefore, in the engine generator frequency switching device according to the present invention configured as described above, when the operating knob 4 is switched from the 50 Hz position to the 60 Hz position, the shaft 5 moves backward with a constant stroke due to the inclination of the cam plate 8. However, when the position is changed from 60Hz to 50Hz, the shaft 5 moves forward with a constant stroke, and the movement of the shaft 5 at that time is transmitted to the governor lever 12 via the guide pin 15, causing it to rotate, and the shaft 5 moves forward through the governor spring 24. The advance angle is adjusted appropriately in the advancer, and the output frequency of the engine generator is switched.

At that time, when the operation knob 4 is set to the 60Hz position, that is, when the shaft 5 is in the retracted position, the position of the tip of the governor lever 12 (the connection end of the cabana spring 24) is adjusted by the 60Hz adjustment screw 21. The adjustment is made by appropriately changing the relative position with respect to the auxiliary lever 13, which is rotated according to 5. Furthermore, when the operation knob 4 is set to the 50Hz position, that is, when the shaft 5 is in the forward position, the position of the tip of the governor lever 12 relative to the board 1 can be changed as appropriate using the 50Hz adjustment screw 23. Adjusted by. In this case, the adjustment of the governor lever 12 is performed independently of the auxiliary lever 13 by means of the elongated hole 17 through which the guide pin 15 passes, so as not to affect the adjustment of the 60 Hz position in any way.

As described above, the frequency switching device for an engine generator according to the present invention has a means for moving the shaft forward and backward by a certain amount by switching between two positions of the operation knob, and a means for moving the shaft forward and backward by a certain amount by switching between two positions of the operating knob, and a guide pin provided on the shaft. auxiliary lever means for transmitting the movement of the governor lever to the governor lever; first adjusting means for adjusting the position of the governor lever loosely fitted to the guide pin relative to the auxiliary lever; and first adjusting means for adjusting the position of the governor lever relative to the base plate. It is configured by the adjusting means of 2, and can adjust each frequency switching position of 50 Hz and 60 Hz, respectively, without adjusting the switching position of one frequency having any effect on the switching position of the other frequency. It has the excellent advantage that it can be performed independently and with high precision.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the frequency switching device for an engine generator according to the present invention, FIG. 2 is a front view of the operation knob and cam plate portion in the same embodiment, and FIG. FIG. 3 is an exploded perspective view of the constituent parts. 1... Board, 4... Operation knob, 5... Shaft, 8... Cam plate, 12... Governor lever, 13
...Auxiliary lever, 15...Guide pin, 21...
60Hz adjustment screw, 23...50Hz adjustment screw, 24
...Governor spring.

Claims (1)

[Scope of utility model registration request] means for moving the shaft forward or backward by a certain amount by switching between two positions of an operating knob; and an auxiliary lever means for transmitting shaft movement to a governor lever in cooperation with a guide pin provided on the shaft;
A first adjusting means for adjusting the position of the governor lever loosely fitted to the guide pin with respect to the auxiliary lever, and a second adjusting means for adjusting the position of the governor lever with respect to the base plate. Engine generator frequency switching device.