JPH077557Y2 - Frequency generator for engine generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a frequency switching device for an engine generator, and in particular, it aims to improve the certainty of the switching operation by the frequency switching device and to improve the operability of the switching operation. The present invention also relates to a frequency switching device for an engine generator.

[Prior Art] In an engine generator, the frequency is divided into 50 hertz and 60 hertz depending on the region, so it is necessary to switch to 50 or 60 hertz to match the frequency of the region. , Equipped with a frequency switching device. This frequency switching device is disclosed, for example, in Japanese Utility Model Laid-Open No. 57-28143. The one described in this publication has a configuration in which, when the frequency is switched, the rotation speed of the generator is automatically changed to adapt to the frequency of each circuit, and various electric appliances connected to the engine generator are It operates normally and is easy to operate.

Some of the frequency switching devices are configured as shown in FIGS. That is, as shown in FIG. 3, when the end portion of the operation lever portion 106 is grasped and the operation lever portion 106 is positioned on the left side in FIG. 3, the operation lever portion 106 rotates about the rotation shaft 112. By doing so, the hook portion 110 is rotated in the direction of arrow A, which is the left side in FIG. 3, whereby the tension of the governor spring 136 connected to the governor lever (not shown) becomes large, and the rotation speed of the generator becomes high.

The state where the number of rotations is high is the first adjustment screw for 60 Hz.
It is adjusted by rotating 116 and the frequency is adjusted to 60 hertz. Further, as shown in FIG. 3, when the gripping portion operating lever portion 106 is positioned on the right side in FIG. 3, the operating lever portion 106 rotates about the rotation shaft 112, so that the hook portion 110 moves to the third position. It is rotated in the direction of arrow B, which is the right side in the figure. This allows the governor spring 13
The tension of 6 becomes small and the rotation speed of the generator becomes low. The state where the rotation speed becomes low is that the second adjustment screw 126 for 50 Hz is used.
It is adjusted by turning, and the frequency is adjusted to 50 Hz.

[Problems to be Solved by the Invention] By the way, in the conventional frequency switching device for the engine generator, in order to slightly increase the rotational speed of the engine generator,
When the first adjustment screw for Hertz is rotated, it is difficult for the rotating operation of the hook portion to smoothly follow the operation of the first adjustment screw by the urging force of the urging member.

Further, when the biasing force of the biasing member is large, the hook portion becomes the first
It smoothly follows the operation of the adjusting screw, but when the rotation speed is reduced by the first adjusting screw, it cannot be easily adjusted due to the large biasing force and the resistance of the caulking part.
It is disadvantageous in practical use.

Furthermore, the frequency switching device of the conventional engine generator is the third to sixth.
As is clear from the figure, when increasing the rotation speed by the 60 Hz first adjusting screw, it is necessary to rotate the first adjusting screw counterclockwise, and by increasing the rotating speed by the 50 Hz second adjusting screw. In that case, it is necessary to turn the second adjusting screw clockwise.

For this reason, there is a risk of confusion when adjusting the rotation speed,
The adjustment operation becomes extremely difficult, which is inconvenient in terms of usability.

[Object of the Invention] Therefore, in order to eliminate the above-mentioned inconvenience, the object of the present invention is to provide a bracket with an operating lever portion having a cam-shaped tip portion and for switching the frequency, and at the tip portion of the operating lever portion, the operating lever portion The connection lever part having a rotation center different from the rotation center of the connection part is locked and provided, and the rotation center of the hook part for switching the frequency by the rotation operation is located at the rotation center position of the connection lever part. A first adjusting portion is provided between the connecting lever portion and the hook portion for adjusting the mutual positional relationship, and the directivity direction between the bracket and the hook portion is substantially the same as that of the first screw portion of the first adjusting portion. And a second adjusting portion for adjusting the mutual positional relationship between the bracket and the hook portion before the switching by the operation lever portion and for separating the second screw portion from the bracket side at the time of switching by the operation lever portion. As a result, the switching operation by the frequency switching device can be reliably performed, the reliability of the switching operation can be improved, the switching operation is extremely simple, and the operability of the switching operation can be improved. To realize the frequency switching device.

[Means for Solving the Problems] In order to achieve this object, the present invention, in a frequency switching device for switching the frequency of an engine generator as desired, performs a switching operation of a frequency having a cam-shaped tip. The operation lever portion is provided on the bracket, and the connection lever portion having a rotation center different from the rotation center of the operation lever portion is provided at the distal end portion of the operation lever portion by locking the connection lever portion at the rotation center position. Is provided by arranging the rotation center of the hook portion for switching the frequency by the rotation operation, and providing a first adjusting portion for adjusting the mutual positional relationship between the connection lever portion and the hook portion, and between the bracket and the hook portion. Has a second screw part in the same direction as the direction of the first screw part of the first adjusting part, and adjusts the mutual positional relationship between the bracket and the hook part before switching by the operation lever part. Further, a second adjusting portion is provided in which the second screw portion is separated from the bracket side at the time of switching by the operation lever portion.

[Operation] With the above-described configuration, when performing the switching operation of the frequency switching device, the operation lever portion is rotated in a desired direction, and the operation lever portion and the hook that are locked to the cam-shaped tip portion are provided. The parts can be rotated about the same rotation center and the frequency can be switched to reliably perform the switching operation. The reliability of the switching operation is improved and the switching operation is extremely simple. It improves the sex.

Further, the mutual adjustment of the connection lever portion and the hook portion is adjusted by the first adjusting portion, and the second screw portion in the same directional direction as the directional direction of the first screw portion of the first adjusting portion is adjusted. The second adjustment part, which has the second screw part away from the bracket side when the operation lever part is switched, adjusts the mutual positional relationship between the bracket and the hook part before the switching by the operation lever part, so that an adjustment error is unlikely to occur and usability Has improved.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the drawings.

1 and 2 show an embodiment of the present invention. In FIGS. 1 and 2, reference numeral 2 is a frequency switching device for an engine generator. This frequency switching device 2 includes a bracket 4, an operating lever portion 6 provided on the bracket 4, a connecting lever portion 8 locked to a cam-shaped tip portion 6a of the operating lever portion 6, and a connecting lever portion. 8 and a hook portion 10 having the same center of rotation.

More specifically, the tip 4a of the operating lever portion 6 is pivotally supported by the bracket 4 by the first rotating shaft 12, and the tip 6a is supported.
As shown in FIG. 1, the connection lever portion 8 is locked when the switching operation is performed at 50 Hz. At this time, the connection lever portion 8 is pivotally supported by the second rotation shaft 14 so that the rotation center of the operation lever portion 6 is different from the rotation center of the connection lever portion 8.

Further, a hook portion 10 for switching the frequency by the rotating operation of a generator (not shown) is pivotally supported on the second rotating shaft 14 portion of the connecting lever portion 8 to connect the connecting lever portion 8 and the hook portion 10.
A first adjusting unit 16 for adjusting the mutual positional relationship is provided between them.
The first adjusting portion 16 is a first fixing portion fixed to the connection lever portion 8.
The member 18 and the second member 2 fixed to the one end 10a of the hook portion 10.
0, the first member 18 is engaged and the tip portion is the second member 2
It is composed of a first screw portion 22 that contacts 0, and a first spring 24 that is contracted between the head portion 22a of the first screw portion 22 and the first member 18. The first adjusting unit 16 is used as an adjusting screw for finely adjusting the rotation speed of the engine generator (not shown) at 60 Hz.

Further, between the first adjusting portion 16 and the bracket 4 and the hook portion 10 at a position facing each other on the second rotating shaft 14, the same function as the first adjusting portion 16 is provided, that is, the first adjusting portion 16 is provided.
Has a second screw portion in a direction substantially the same as the direction of the first screw portion 22, and adjusts and operates the mutual positional relationship between the bracket 4 and the hook portion 10 before switching by the operation lever portion 6. A second adjusting portion 26 is provided which separates a second screw portion 32, which will be described later, from the bracket 4 side when switching by the lever portion 6. The second adjusting portion 26 includes a third member 28 fixed to the other end 10b of the hook portion 10 and a fourth member fixed to the bracket 4.
The member 30 and the third member 28 are engaged with each other and the tip end portion is the fourth
The second screw portion 32 that contacts the member 30 and the head of the second screw portion 32
A second spring 34 contracted between 32a and the third member 28.
Consists of. Further, as is apparent from FIG. 1, the second adjusting section 26 sets the directivity direction of the second screw section 32 of the second adjusting section 26 relative to the directivity direction of the first screw section 22 of the first adjusting section 16. They are arranged so as to be substantially the same, and are used as an adjusting screw for finely adjusting the rotation speed at 50 Hz before switching of the operation lever portion 6.

Further, the other end 10b of the hook portion 10 has a governor spring 3
Attach one end of 6 together with this governor spring 3
The other end of 6 is attached to a governor lever (not shown) of the speed governor.

Reference numeral 38 is a lever return spring of the operation lever portion 6.

Next, the operation will be described.

The frequency of the generator not shown is, for example, 50 before switching.
When switching from hertz to 60 hertz, the operation lever portion 6 is rotated clockwise around the first rotary shaft 12 in FIG. 1, and the cam-shaped tip portion 6a of the operation lever portion 6 is rotated.
Presses the connection lever portion 8, and the connection lever portion 8 is rotated about the second rotation shaft 14 in the counterclockwise direction in FIG. At this time, the hook portion 10 is also connected to the connection lever portion 8 by the first adjusting portion 16 between the connection lever portion 8 and the hook portion 10.
Similarly to the above, the second rotary shaft 14 is rotated in the counterclockwise direction in FIG. And the other end of the hook portion 10
10b pulls the governor spring 36 to increase the rotation speed.

At this time, the second screw portion 32 of the second adjusting portion 26 is separated from the fourth member 30 on the bracket 4 side.

Further, the fine adjustment at 60 hertz may be performed by rotating the first screw portion 22 of the first adjusting portion 16.

Further, when the frequency of the engine generator is switched from 60 hertz to 50 hertz, the reverse operation of the above switching operation is performed. That is, the operation lever portion 6 is moved around the first rotating shaft 12 as the first
Rotate in the counterclockwise direction in the figure to connect the connection lever portion 8
Is rotated clockwise about the second rotation shaft 14. Then, the hook portion 10 is also rotated in the clockwise direction to return the governor spring 36, and the rotation speed is lowered.

At this time, the second screw portion 32 of the second adjusting portion 26 comes into contact with the fourth member 30 on the bracket 4 side, and the rotational speed at 50 Hz can be finely adjusted.

As a result, the switching operation can be performed reliably, the reliability of the switching operation can be improved, and the switching operation is extremely simple, so that the frequency switching operability by the operation lever portion can be improved.

Further, due to the structure of the first and second adjusting portions, it is sufficient to rotate the first and second screw portions that are oriented in substantially the same direction at the time of adjustment, respectively, so that adjustment errors are less likely to occur and usability can be improved. .

[Effects of the Invention] As described in detail above, according to the present invention, the operation lever portion having the cam shape at the tip is provided on the bracket for switching the frequency, and the operation lever is provided at the tip of the operation lever. The connection lever part, which has a rotation center different from the center of movement, is provided by locking, and the rotation center of the hook part that switches the frequency by the rotation operation is provided at the rotation center position of the connection lever part. A first adjusting portion for adjusting a mutual positional relationship is provided between the lever portion and the hook portion, and a second adjusting direction between the bracket and the hook portion is substantially the same as that of the first screw portion of the first adjusting portion. Since the second adjusting portion having the screw portion is provided to adjust the mutual positional relationship between the bracket and the hook portion before the switching by the operation lever portion, and the second screw portion is separated from the bracket side at the time of switching by the operation lever portion. frequency The switching operation can be reliably performed by the number switching device, and the reliability of the switching operation can be improved. Further, the frequency switching operation is extremely simple, and the operability of the switching operation can be improved.
Further, due to the structure of the frequency switching device, since the directing directions of the screw parts of the first and second adjusting parts are substantially the same, it suffices to rotate them in the same direction at the time of adjustment, and an adjustment error is unlikely to occur.
The usability can be improved.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a schematic plan view of a frequency switching device, and FIG. 2 is a schematic front view of a frequency switching device. 3 to 6 show the prior art of the present invention, FIG. 3 is a schematic plan view of the frequency switching device, FIG. 4 is a schematic front view of the frequency switching device, and FIG. 5 is a schematic bottom view of the frequency switching device. Sixth
The figure is a schematic right side view of the frequency switching device. In the figure, 2 is a frequency switching device, 4 is a bracket, and 6
Is an operating lever portion, 6a is a tip portion, 8 is a connecting lever portion, 10 is a hook portion, 10a is one end, 13 is a first rotating shaft, 14 is a second rotating shaft, 16 is a first adjusting portion, and 18 is First member, 20 is second member, 22
Is a first screw part, 22a is a head part, 24 is a first spring, 26 is a first adjusting part, 28 is a third seating property, 30 is a fourth member, and 32 is a second part.
A screw portion, 32a is a head portion, 34 is a second spring, 36 is a governor spring, and 38 is a lever return spring.

Claims (1)

[Scope of utility model registration request] 1. A frequency switching device for switching the frequency of an engine generator as desired, wherein a bracket is provided with an operating lever portion having a cam-shaped tip portion for switching the frequency, and the tip portion of the operating lever portion is provided. A connection lever portion having a rotation center different from the rotation center of the operation lever portion is provided so as to be locked, and a rotation center position of the connection lever portion is provided with a rotation center of a hook portion for switching a frequency by a rotation operation. It is located and installed,
A first adjusting portion is provided between the connecting lever portion and the hook portion to adjust the mutual positional relationship, and the orientation between the bracket and the hook portion is substantially the same as the orientation direction of the first screw portion of the first adjusting portion. A second screw portion having a second screw portion in the direction, adjusting the mutual positional relationship between the bracket and the hook portion before the switching by the operation lever portion, and separating the second screw portion from the bracket side at the time of switching by the operation lever portion. A frequency switching device for an engine generator, comprising an adjusting unit.