JPH0312185Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric spring operating device used in switches such as disconnectors and earthing switches.

[Conventional technology]

As this type of operating device, the same applicant for utility model registration has published Utility Model Application No. 150738/1988 "Electric Spring Operating Device", Publication No. 153443/1988 entitled "Mechanical Interlock Device for Electric Spring Operating Mechanism", Utsukai Showa 60-
Publication No. 153444 “Position holding device for electric spring actuator”
An application has been filed for this, which allows the operating spring to perform only linear motion during the operation of the operating device, thereby preventing excess force from being applied to the operating spring due to centrifugal force, and preventing complicated machining of clutches, cams, etc. By omitting parts that require as much as possible, we were able to simplify and downsize the mechanism.

However, in this structure, as shown in FIG. 2, the input shaft and the output shaft are provided apart from each other, and the two shafts are connected by a link to transmit power. Here, 1 is a motor, 2 is a clutch, 3 is a speed reducer, 4 is a threaded rod, 5 is a slider, 6 is a hoisting lever A, 7 is a hoisting shaft (input shaft), and 8 is a hoisting lever B , 9 is the reversing lever,
10 is a link, 11 is an output shaft, 12 is an auxiliary switch, 13 is a stopper, 14 is a manual handle coupling device,
15 is an electromagnetic contact device.

[Problem that the invention attempts to solve]

As described above, in the structure shown in the prior application, the input shaft and the output shaft are arranged separately, so the number of parts is large, the mechanism is large, and the friction loss between them is large.

[Means for solving problems]

The present invention was developed in response to this problem, and it solves the above drawbacks by making the input shaft and output shaft coaxial, and providing a bearing for one shaft with a bearing for the other shaft. The details of the present invention will be explained below with reference to Examples.

〔Example〕

FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention;
Figure 3 a, b and c show the loading and winding process,
and FIG. 7 is an operation explanatory diagram of each state of disconnection. As mentioned above, in the present invention, the input shaft and the output shaft are arranged coaxially with each other, and each shaft is provided with a plurality of levers. The same axes are shown connected by broken lines.

Here, it is assumed that the operating device is in the closed state shown in FIG. 3a. When the closing command is issued and the motor 21 rotates, the rotation is transmitted from the clutch 22 to the reduction gear 23 to the threaded rod 24, the slider 25 moves to the right, and the hoisting lever A26 rotates the input shaft 27 in the opposite direction. Rotate clockwise. The input shaft 27 has a winding lever A2.
A winding lever B28 is integrally attached to the winding lever B28, and the winding lever B28 also rotates counterclockwise, and the lever A30 is rotated counterclockwise via the winding roller 29.
The lever B32 connected via the operation spring 33
Rotate clockwise against the

However, the lever A30 is rotatably attached to the output shaft 34, and at this point the hoisting roller 29
The reversing lever 3 integrally attached to the output shaft 34 only moves the driving roller 35 attached coaxially with the output shaft 34.
6 remains stopped at the old position.

In this way, a dead center is formed by the lever A30 and the link 31, resulting in the state shown in FIG. Rotate counterclockwise past the point. Operation spring 33
lever A3 due to the tension applied to lever B32 from
0 rapidly rotates counterclockwise, the driving roller 35 drives the reversing lever 36 counterclockwise, and the output shaft 34 integrated with the reversing lever 36 rotates counterclockwise. The operating device is thus in the disconnected state shown in FIG. 3c.

In this way, the operating device changes from the closed state to the disconnected state, and conversely, by performing the above operation in the opposite manner from the disconnected state shown in FIG. 3c, the operating device changes from the disconnected state to the closed state.

That is, in the present invention, as shown in FIGS. 1 and 3, the input shaft 27 is connected to the winding lever A26.
and the winding lever B28, and the reversing lever 36 is integrally attached to the output shaft 34, and the lever A30 is freely rotatable.Both shafts are short in length, and even if they are arranged coaxially, there will be no problem. do not have.

The above embodiment includes a limit switch and a stopper for limiting the operation of each part, a buffer for mitigating the impact at each operation end of closing and disconnecting,
The description of accessory devices such as a display device for displaying the open/closed state, a manual operation device, and an interlock device will be omitted.

Next, FIGS. 4a, b, c, and d show respective embodiments for coaxially arranging the input shaft and the output shaft. The left end of the formed input shaft 27 is held by a pedestal 42 via a bearing 41,
The right end is held by the left end of the output shaft 34 via a bearing 43 fitted inside. Also, the reversing lever 3
The output shaft 34 integrally formed with the input shaft 6 supports the input shaft 27 at the left end as described above, and has bearings 44 and 45.
The lever A30 is held by pedestals 46 and 47 via a bearing 48, and a lever A30 is rotatably attached via a bearing 48.

FIG. 4b shows that the bearing 44 and pedestal 46 in the above a are moved to the center of the input shaft 27, and
In contrast to the above case, the right end of the input shaft 27 is extended and inserted inside the left end of the output shaft 34, and the left end of the output shaft 34 is held via a bearing 49.

Next, in FIG. 4c, the bearing 44 and pedestal 46 are left as they are in the above a, and the right end of the input shaft 27 is inserted inside the left end of the output shaft 34 as in the above b, and is held through the bearing 49. be.

Further, in FIG. 4 d, the bearing 44 and the pedestal 46 in the above a are moved to the vicinity of the right end of the input shaft 27.

In this way, the input shaft 27 and the output shaft 34 can have a coaxial structure, and can be held and operated reliably.

[Effect of idea]

As explained above, according to the present invention, the input shaft and the output shaft, which were provided separately in conventional actuators, are arranged coaxially, thereby reducing space and downsizing. Since the length is short, there is no problem in coaxial arrangement, and the operating device can be made smaller compared to the conventional case where it is provided separately.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention;
Figure 2 is a sectional view showing the conventional configuration, Figure 3 a, b
4 and c are operation explanatory diagrams showing a closed state, an intermediate winding state, and a disconnected state, respectively, and FIGS. 4 a to 4 d are sectional views showing an embodiment in which an input shaft and an output shaft are arranged coaxially, respectively. 21...Motor, 27...Input shaft, 33...Operation spring, 34...Output shaft.

Claims (1)

[Scope of utility model registration request] an input shaft connected to a motor that operates according to a switch operation command; a link device connected to the input shaft that forces an operating spring by the operation of the input shaft; and an input shaft that is released from the operating spring when the link device passes the dead center. and an output shaft that is driven by a releasing force to open and close the switch, the input shaft and the output shaft are arranged coaxially with each other, and one shaft end is provided with a bearing for the other shaft. Electric spring operating device for switches.