JPS6364021B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a switching operation device such as a switch palm or a disconnector.

(Prior Art) Opening/closing operating devices for opening and closing switches, disconnectors, etc. can be roughly divided into (a) solenoid operated types, (b) air operated types, and (c) electric spring operated types. (a) has a relatively simple structure, but requires an operation source that requires a large amount of power. (B) can be simplified like (B) and can obtain a large operating force, but requires compressed air and is difficult to secure an operating source. (C) stores input energy in the spring, so the operation source requires a small capacity, but since the spring energy decreases during the input process, a correction part for the input force is required, and the structure is compared to others. It is common for it to become more complex.

(Problems to be Solved by the Invention) Therefore, if the structure of the electric spring operated type could be simplified, it would be ideal as an opening/closing operating device. From this point of view, an opening/closing operation device that stores input energy in a closing spring and locks it with a closing catch, and for closing operation, releases the locking of the closing catch, rotates a cam with the closing spring, and rapidly closes the lock via a link device. There is. However, in such a device, in order to store energy in the closing spring, the electric motor for accumulating energy is moved beyond the dead point and latched to the closing catch via a deceleration device, but the electric motor for accumulating energy is opened by a position detection switch. The overrun also caused the input catch to collide with the input catch, causing an impact and increasing the operating load on the input catch.If the circuit was opened early in anticipation of an overrun, the input catch would not latch.

The present invention has been made in view of the above-mentioned drawbacks, and provides an electric spring-operated opening/closing device that reliably locks the closing catch even if the electric motor that stores energy in the closing spring is opened prematurely. The purpose is to

[Structure of the invention]

(Means and effects for solving the problem) A spur gear rotated by an electric motor is attached to a case having a notch in the circumferential direction via a roller clutch at one end of the camshaft, and a spring hook is attached to the spur gear. By providing a pin, installing a spring hook pin in the notch of the case, and tensioning the spring between the spring hook pins installed in the case and the spur gear, the electric motor that stores energy for the closing spring can be quickly activated. It is possible to provide an electric spring-operated opening/closing operation device that is capable of reliably locking the input catch even if the circuit is opened.

(Example) An example of the present invention shown in the drawings will be described below. In FIGS. 1 and 2, a movable contact 61 that connects and separates from a fixed contact 60 such as a switch or disconnector
is operated by a pivot shaft 3 pivoted on the frame 2 of the movable arm 1 via a contact spring 62, and has one end connected to the first pin 4 at the end of the movable arm 1. The other link 5 is connected to one of the second links 7 by a second pin 6, and the second link 7
The other one is connected by a third pin 8 to a third link 10 which is pivotally connected to the frame 2 by a pin 9. One of the fourth links 11 is connected to the second pin 6, and the other side is connected to the fourth pin 14 of a trip catch 13 which is pivotally connected to the frame 2 by a pin 12, and the other side is connected to the fourth pin 14 of a trip catch 13 which is pivotally connected to the frame 2 by a pin 12, and the other side is connected to a fourth pin 14 of a trip catch 13 which is pivotally connected to the frame 2 by a pin 12, and which is connected to a pin 15 of the first link 5. The trip catch 13 is biased counterclockwise by a spring 16 suspended and pulled in the direction of the pivot shaft 3, and is locked by a stopper 17. Free links 18 and 19 pivotally attached to pin 9 are connected and integrated at 20, and a roller 21 is rotatably held at the end of free link 18 by a pin 22 and placed in a position opposite to a charging cam 23 to be described later. It is placed.

A camshaft 24 that fixes the input cam 23 is rotatably supported by the frame 2 with a bearing 25, and a pin 26 of a link 26 fixed to one end.
A roller pin 28, which is pulled downward by a closing spring 27 and protrudes from the side surface of the closing cam 23, is supported by a loading catch 30 fixed to a shaft 29 supported by a bearing 29a on the frame 2, and the closing catch 30 is not shown in the figure. It is biased counterclockwise by a spring and is locked to the stopper 31. The movable arm 1 is urged counterclockwise by a circuit opening spring 32.

A manual handle 34 is attached to one end of the camshaft 24 via a roller clutch 33, a case 36 is attached to the other end via a roller clutch 35, and a display cam 37 is fixed to the end surface. There is. The roller clutches 33 and 35 are one-sided clutches that transmit rotation in only one direction and are free to rotate in the opposite direction. The case 36 engages with a later-described engagement pin 45 of a rotatable spur gear 38, and the spur gear 38 is rotated by a spur gear 40 directly connected to an electric motor 39. Tripping shaft 4 that locks the tripping catch 13
1 is rotated by a tripping coil 42, and a closing shaft 43 that locks the closing catch 30 is rotated by a closing coil 44.

FIG. 3 is a detailed view of the camshaft 24, in which the engagement pin 45 implanted in the spur gear 38 engages with the notch 36a of the case 36 as shown in FIG.
The spring 4 is inserted between the spring hanging pin 46 installed in the case 8 and the spring hanging pin 47 installed in the radial direction of the case 36.
8 is hanging.

6 and 7 are detailed views of the case 36,
The engagement pin 45 rests in contact with the A position of the notch 36a of the case 36 by a spring 48.

FIG. 8 is a detailed view of the display cam 37, in which one end of the indicator bar 49 is rotatably supported by a pin 50, the other end is fixed to an indicator plate 51, and is supported by a spring 5.
2, the pin 53 slides on the outer periphery of the display cam 37 and falls into the valley of the display cam 37, operating the position detection switch 54 which opens and closes the circuit of the electric motor 39.

FIG. 9 is a detailed view of the trip catch 13, in which the outer circumferential surface of the end of the trip shaft 41 that locks the trip catch 13, which locks on the half-moon-shaped end 41a, is smaller than the radius of the pin 12. It has an arcuate surface eccentric to the side of the tripping shaft 41, so that the end 13a of the tripping catch 13 does not come into contact with the engaging end 41a of the tripping shaft 41 during return.

Next, the action will be explained. In the closing operation, first, rotational force is stored in the closing cam 23 by the closing spring 27. When input is applied to the electric motor 39 (see FIG. 2), the spur gear 40 rotates the spur gear 38 counterclockwise in FIG. 4, and the engagement pin 45 rotates clockwise from position A in FIG. 36, the case 36 rotates clockwise together with the roller clutch 35, which engages the camshaft 24 in FIG. 3 and rotates counterclockwise in FIG. 4. The pin 53 shown in FIG. 8 falls into the recess of the cam 37, and the indicator bar 49 rotates counterclockwise.
9 (see Figure 2) is opened. The operating position of the position detection switch 54 of the display cam 37 is set in advance to a position slightly beyond the dead point D of the closing spring 27 shown in FIG. 1 (see FIG. 3).
Therefore, after the closing spring 27 slightly exceeds the dead point D, the roller pin 28 of the closing cam 23
The camshaft 24 automatically rotates rapidly until it hits the input catch 30 and is held there, resulting in the input standby state shown in FIG. At this time, when the engaging pin 45 of the spur gear 38 shown in FIG. 7 pushes and rotates the case 36, when it slightly exceeds the dead point D, only the case 36 rotates due to the force of the spring 48, as shown in FIG. Thus, a gap G is created between the notch 36a of the case 36 and the pin 45. Due to this gap G, overrun is not transmitted to the case 36 until the electric motor 39 (see FIG. 2) is opened and stopped by the position detection switch 54 as shown in FIG. Therefore, only the rotational force of the closing spring 27 is applied to the closing catch 30. Therefore, a conventional electric motor 39
Excessive force due to overrun will not act on the input catch 30.

After the rotational force is stored in the closing cam 23 by the closing spring 27, the released energy of the closing spring 27 causes the roller pin 28 to push the closing catch 30, so that the circular arc surface in contact with the closing catch 30 moves clockwise in FIG. Since it is eccentrically rotated, the charging catch 30 is locked by the half-moon-shaped end face of the charging shaft 43.

To manually store energy, move the manual handle 34 clockwise several times as shown in FIGS. 3 and 5, so that the roller clutch 33 engages with the camshaft 24 when rotated clockwise, and rotates idly when rotated counterclockwise. As a result, the closing spring 27 is energized and the state shown in FIG. 1 is achieved. At this time, during idle rotation, the roller clutch 35 engages with the camshaft 24 and holds it so that it does not rotate. The manual handle 34 is stopped at a stopper by a spring (not shown).

In the closing operation, when the closing coil 44 is excited and the closing shaft 43 is rotated clockwise, the closing catch 30 is unlocked, and since the circular arc surface of the closing catch 30 is eccentric, it is pushed clockwise and the roller pin 28 is released, and the closing cam 23 is rotated clockwise by the closing spring 27. The input cam 23 pushes the free links 18 and 19 counterclockwise with its cam surface, pushes the third link 10 counterclockwise with the pin 9 as a fulcrum, and closes the second link 7 and the first link 5. The movable arm 1 is rotated clockwise via the movable contact 61 to close the fixed contact 60,
The first link 5, the second link 7 and the third link 10 form a toggle, the fourth link 11 biasing the trip catch 13 clockwise and locking it on the trip shaft 41. It will be in the input state as shown in the figure. At the same time, the electric motor 39 starts rotating and the charging cam 2
3 rotates and returns to the input standby state.

In the trip operation, when the trip coil 42 is energized in the closed state shown in FIG. 10, the trip shaft 41 rotates clockwise and the trip catch 1 is turned.
3 is rotated clockwise, the toggle between the first link 5 and the second link 7 is broken, and the movable arm 1 is rotated counterclockwise, and the movable contact 61 is opened from the fixed contact 60 to open the first link 5 and the second link 7. Figure states and lives. When the trip catch 13 returns, the end surface of the trip catch 13 is an arcuate surface that is eccentric toward the trip shaft 41 with respect to the pin 12.
Even if the pin 12 has returned, it can smoothly enter the notch of the trip shaft 41 from the small circular arc surface from the pin 12.

FIG. 11 shows the tripping free state where the tripping operation was performed in the middle of the loading operation from FIG. 1 to FIG. 10.

〔Effect of the invention〕

As described above, according to the present invention, in the case of an electric spring-operated opening/closing device, the closing spring is loaded with energy and is attached to the camshaft fixed to the closing cam that locks on the closing clutch via the roller clutch. A spur gear, which is rotated by an electric motor, is rotatably mounted, and an engagement pin implanted in the spur gear is arranged with a gap in the notch of the case, and a spring hook pin is implanted in the case and the spur gear, respectively. Since a spring is stretched between them, even if the motor opens and stops when it slightly exceeds the dead point of the closing spring, the case will automatically rotate and the closing cam will not engage with the closing clutch. The closing clutch is not subjected to excessive force from the electric motor as in the conventional case. Therefore, even if the motor is opened prematurely, it is securely engaged with the closing clutch, and there is an excellent effect that the excessive force of the conventional motor does not apply.

[Brief explanation of drawings]

FIG. 1 is a right side view showing an embodiment of the opening/closing device of the present invention in a standby state, FIG. 2 is a front view, FIG. 3 is a front view showing the main parts of FIG. 2, and FIG. Left side view, Figure 5 is a right side view, Figure 6 is a front view showing the spur gear in Figure 3, Figure 7 is a right side view, and Figure 8 is a left side view showing the main parts of Figure 2. , FIG. 9 is a right side view showing the trip catch of FIG. 1, FIG. 10 is a right side view showing the trip catch in the closed state, and FIG. 11 is a right side view showing the trip catch in the free state. DESCRIPTION OF SYMBOLS 1... Movable arm, 2... Frame, 3... Rotation axis, 4... First pin, 5... First link,
6...Second pin, 7...Second link, 8...
Third pin, 10...Third link, 11...Fourth link, 13...Trip catch, 14...
...Fourth pin, 18, 19...Free link, 21
...Roller, 23...Closing cam, 24...Camshaft, 26...Link, 27...Closing spring, 28...Roller pin, 29...Shaft, 3
0... Closing catch, 32... Opening spring, 33
...Roller clutch, 34...Manual handle, 3
5...Roller clutch, 36...Case, 36a
... Notch, 37 ... Display cam, 38 ... Spur gear, 39 ... Electric motor, 40 ... Spur gear, 41 ...
Tripping shaft, 42...tripping coil,
43... Closing shaft, 44... Closing coil,
45... Engagement pin, 46, 47... Spring hanging pin, 48... Spring, 49... Indicator bar,
54...Position detection switch.

Claims (1)

[Claims] 1. One end of a movable arm is rotatably attached to a rotation shaft, the other end of this movable arm is connected to one end of a first link via a first pin, and the other end of the first link is connected to a first link. the other end of the second link is connected to one end of the third link via a third pin, and the other end of the third link is connected to one end of the second link via a second pin; is connected to one end of the free link, and a roller is attached to the other end of the free link,
This roller is engaged with the outer periphery of a charging cam attached to a camshaft, a roller pin is attached to the side surface of the charging cam, and this roller pin is pivoted to the shaft attached to the frame at the energy storage position of the charging cam. In the opening/closing operation device that engages with the end of the input catch, a spur gear rotated by an electric motor is attached to one end of the camshaft via a roller clutch in a case having a notch in the circumferential direction. a first spring hook pin planted in the case, a second spring hook pin planted in the notch of the case, and first and second spring hook pins planted in the case and the spur gear, respectively; An opening/closing operation device characterized by having a spring stretched between the opening and closing operation devices.