JP2606496B2 - Electric moving operation device for electric equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric moving operation device for electric equipment which is suitable for use as a moving operation device for opening and closing a main circuit of a switchgear in a closed switchgear.

[0002]

2. Description of the Related Art When a switchgear such as a circuit breaker is cut off or inserted into a main circuit in a closed switchgear, an electric moving operation device as shown in FIGS. 8 and 9 is conventionally used. ing. In this apparatus, reference numeral 1 denotes a circuit breaker, and the circuit breaker 1 is
The automatic connection device 3 is provided on the side of the opening / closing device 2. A drive motor 4 is mounted on the circuit breaker 1, and a gear type speed reducer 5 is provided on an output shaft of the motor 4. The gear at the last stage of the speed reducer 5 is coupled to one end (left end in FIG. 9) of a screw sleeve 6 serving as an output portion, and a female screw is formed at the other end (right end in FIG. 9) of the screw sleeve 6. ing. One end of the female screw of the screw sleeve 6 has an open / close device 2.
Is always engaged with the male screw of the fixed screw rod 7 engaged with the screw. A switch 8 is provided below the circuit breaker 1. The switch 8 is turned on when the switch 8 is engaged with the pull-out cam 9 and the insertion cam 10 provided on the base along the moving path of the circuit breaker 1.

When the circuit breaker 1 is inserted into the main circuit from the state shown in FIGS. 8 and 9 cut off from the main circuit, the insertion switch is operated to operate the electric motor. 4, the rotation of the output shaft is reduced by the speed reducer 5 and transmitted to the screw sleeve 6, and the female screw portion at the right end of the screw sleeve 6 is rotated. Then, the breaker 1 moves rightward due to the insertion of the fixing screw rod 7 into the screw sleeve 6, and reaches the insertion position. Further, when the circuit breaker 1 advances to a position where the circuit breaker 1 is slightly over-inserted, the switch 8 is operated by the insertion cam 10, so that the operation contactor of the electric motor 4 is restored and the power is cut off. At this time, since the electric motor 4 still tries to rotate due to the inertial force, after the power supply is cut off, the armature coil of the electric motor 4 is short-circuited to electrically suddenly brake and stop the driven body. To

On the other hand, when the circuit breaker 1 is pulled out of the main circuit, when the drawer operation switch is operated, the electric motor 4 is started in the reverse rotation direction to the insertion direction, whereby the automatic coupling device 3 is disengaged. At this time, the main circuit on the side of the circuit breaker 1 and the main circuit on the side of the switchgear 2 are connected with a strong contact force by the automatic coupling device 3, so a particularly large driving force is required in the initial stage of the movement, and the motor 4 For this reason, the start-up under severe conditions almost close to the restrained state is repeated for each operation. In addition, the said contact force becomes so large that the circuit breaker 1 becomes large in capacity. Further, when the automatic connection device 3 is disengaged as described above, the load is reduced and the circuit breaker 1 increases the moving speed, and the switch 8 is operated by the drawer cam 9 in the drawer position, thereby operating the motor 4. The contactor returns and the power is turned off. Then, after the power supply is cut off, the armature coil of the electric motor 4 is short-circuited to electrically stop suddenly and stop the driven body, similarly to the insertion.

[0005] As for the speed reducer, a speed reducer provided with a primary speed reducer composed of a worm gear mechanism and a secondary speed reducer composed of an eccentric drive gear mechanism is disclosed, for example, in Japanese Patent Laid-Open No. 50-537.
No. 65 discloses this.

[0006]

Since the conventional electric moving operation device is constructed as described above, it can be used when the circuit breaker stops at the insertion position and the withdrawal position, especially when the movable weight is large. When the inertia effect becomes large and sudden braking is performed to secure stopping accuracy, very high stress is generated in each part of the drive unit. In addition, as a motor mounted on the circuit breaker, a series-wound wheel type having a large starting torque is usually employed. Therefore, the stop accuracy at the insertion position as well as the stop accuracy at the pull-out position is poor, and there has been a problem that the stop position greatly varies. In particular, the stop accuracy at the insertion position is poor, resulting in over-insertion (when trying to obtain the required insertion dimensions of the main circuit at low voltage, over-insertion occurs at over-voltage).
In such a case, a collision may occur between the main circuit conductors in the automatic connection portion, and in that case, there is a risk that the main circuit member may be damaged or the driving portion may be deformed and damaged.

[0007] Further, the related art described in the above-mentioned publication discloses that a speed reducer is constituted by a primary speed reduction means and a secondary speed reduction means so as to obtain a high speed reduction ratio. It does not disclose means for solving the above-described problem at the time of the stop operation of the circuit breaker in the electric moving operation device.

The present invention has been made in view of the above-described problems, and is not limited to a case where the operating voltage of the drive motor fluctuates greatly, and a case where the moving speed fluctuates.
It is an object of the present invention to obtain an electric moving operation device for an electric device that can be easily controlled with high stopping accuracy.

[0009]

An electric moving operation device for electric equipment according to the present invention transmits a driving force of a motor serving as a driving source to an output unit via a speed reduction device, and performs reversible control of the motor. In a motor-driven electric device for reciprocating an electric device in a fixed section, the speed reducer is constituted by a planetary gear reducer having three axes of an input shaft, an output shaft and a differential shaft, and Control means for controlling transmission and interruption of the driving force to the output shaft by restraining and releasing the differential shaft of the planetary gear reducer.

More specifically, the driving force of a motor as a driving source is output via a planetary gear reducer having three axes of an input shaft, an output shaft, and a differential shaft including a large sun gear shaft. The electric moving operation device of the electric device, which is configured to reciprocate the electric device for a certain section by controlling the electric motor in a reversible manner, while rotating the motor integrally with the output shaft and controlling the moving distance of the electric device. A fixed plate having grooves formed at positions corresponding to the start point and the end point, and the fixed plate is fixed by engaging with the groove of the fixed plate, and disengaged when the electric device is moved to release the fixed plate. A locking lever comprising a locking lever, a locking plate having a plurality of grooves formed at predetermined intervals on the outer periphery of the large sun gear, and engaging with the grooves of the locking plate when the electric device is moved. Restraint means consisting of a locking lever which is released when stopped Operating means for operating the lever in the engaging direction and the releasing direction, and the locking lever is engaged with the locking plate when the fixing lever releases the fixing plate, and the locking lever is engaged when the fixing lever is engaged with the fixing plate. It is configured to include a fixing lever and a connecting means for connecting the locking lever so as to release the locking plate.

[0011]

When the electric device is inserted, the locking plate integrated with the large sun gear shaft is locked by the locking lever, and the rotation of the motor is transmitted from the input shaft to the output shaft via the planetary gear reducer. The output shaft is rotated. Then, while the fixing lever is disengaged from the groove and moves on the fixing plate, the locked state of the large sun gear shaft continues and the rotation of the output shaft continues, whereby the electric device is moved in the insertion direction. . In the insertion completed position, the locking lever is engaged with the groove of the fixing plate, and at the same time, the engagement of the locking lever with the groove of the locking plate is released,
The large sun gear shaft is free to spin and the insertion operation is stopped.

[0012] The operation of pulling out the electric device is performed in the reverse operation to the above-described insertion operation by rotating the electric motor in the opposite direction to the insertion operation.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a partial cross section of an electric moving operation device according to an embodiment of the present invention, FIG. 2 is a side view of the electric moving operation device of the embodiment, and FIG. FIG. 4 is a partial side view of the electric movement operation device of the embodiment, FIG. 5 is a partial side view of the electric movement operation device of the embodiment, and FIG. 6 is an electric movement operation of the embodiment. FIG. 7 is a partial perspective view of the device, and FIG. 7 is an overall configuration diagram of the electric moving operation device of the embodiment.

In this embodiment, as shown in FIG. 1, the electric moving operation device has a box-shaped frame 11.
It has. Holes are provided on both sides of the frame 11 at positions facing each other, and bearings 12 are supported in these holes. In the frame 11, a worm wheel speed reducer 13 and a planetary gear speed reducer 14 are provided. Worm wheel reducer 1
Reference numeral 3 denotes a worm gear 15 supported by a bearing plate fixed to a lower portion of one end surface of the frame 11 and a wheel gear 16 meshing with the worm gear 15. On the other hand, the planetary gear reducer 14 is a small sun gear 1 serving as an input shaft.
7 and two planetary gears 18 meshing with the small sun gear 17
A large sun gear 19 serving as a differential shaft, and the planetary gear 18
And an output shaft 20 that supports the rotation shaft and serves as a revolving shaft. The wheel gear 16 is disposed at an end of the small sun gear 17, and both are drivably connected by a key. The output shaft 20 has one end (the left side in FIG. 1) on the small diameter shaft portion 21 and the other end (the right side in FIG. 1).
Are formed on the large-diameter shaft portion 22, respectively. Two chambers 23 are formed in the center of the large-diameter shaft portion 22 in the width direction corresponding to the number of the planetary gears 18, and the planetary gears 18 are rotatable inside the respective chambers 23 by the support pins 24. It is supported by. Also, at both ends of the outer periphery of the large diameter shaft portion 22, two shaft diameter portions 2 having different outer diameters for supporting the large sun gear 19, respectively.
5 and 26 are provided, and the right large shaft diameter portion 25 is slightly larger than the tooth outside diameter of the large sun gear 19, and the left small shaft diameter portion 26 is slightly smaller than the tooth outside diameter of the large sun gear 19. Each is formed in dimensions. On the other hand, the large sun gear 19 has teeth formed at the center of the inner surface thereof, and cylindrical portions that become bearings corresponding to the two shaft diameter portions 25 and 26 of the large diameter shaft portion 22 of the output shaft 20 on both sides thereof. Is formed. With such a configuration, the large sun gear 19 can be assembled from the left side with the planetary gear 18 incorporated in the output shaft 20, and the large sun gear 19 can be assembled in the operating state.
Can be prevented from moving to the right.

Further, as shown in FIG.
Is provided with a lock plate 28 in which a plurality of (twelve in this example) concave grooves 27 are formed at equal intervals on the outer peripheral portion. The number of the concave grooves 27 (concave groove intervals) is set in relation to the idling time at the time of starting the electric motor 40 described later.

A fixed plate 29 is provided on the left end side of the output shaft 20.
And an output gear 30 are respectively mounted. As shown in FIG. 6, the output gear 30 is connected to a pull-out operation shaft 31.
The pull-out operation shaft 31 is pivotally rotated by a chain 33 and a gear 32 mounted on the pull-out operation shaft 31. One ends of drawer levers 34 and 34 are fastened to both ends of the drawer operating shaft 31, respectively, and a rod 35 extending parallel to the drawer operating shaft 31 is provided at the other end of the drawer lever 34. The rod 35 is provided with a notch 37 of a support arm 36 supported by the opening / closing device 2 on the fixed side.
When the drawer operating shaft 31 is pivotally rotated, the drawer lever 34 is rotated about 180 degrees, and the operation of inserting and pulling out the circuit breaker 1 into and from the main circuit is performed. The support arm 36 is constantly urged by a spring 38 in a direction in which the support arm 36 rotates upward, and the rotation is regulated by a stopper 39.

As shown in FIGS. 1 and 2, a drive motor 40 is fastened to a lower portion of the frame 11 by a support plate 41. The driving force of the electric motor 40 is transmitted to the worm gear 15 via the gears 42 and 43. 3 to 5
As shown in (1), a support 44 is provided on the upper portion of the frame 11, and a lock lever 46 and a fixed lever 47 are rotatably supported on the support 44 by a support pin 45. The lock lever 46 has a roller 49 supported by a pin 48 at the tip, a shaft pin 50 at the other end, and a pin hole 51 at the center for fitting the support pin 45. Further, similarly to the lock lever 46, the fixed lever 47 has a roller 53 supported by a pin 52 at the tip, a shaft pin 54 at the other end, and a pin for fitting the support pin 45 at the center. It has a hole 55. The roller 49 of the locking lever 46 and the roller 53 of the fixing lever 47 are connected to the locking plate 2.
8 and the concave groove 56 provided on the outer periphery of the fixed plate 29. Here, the position where the concave groove 56 of the fixed plate 29 is provided is set at the start point position and the end point position where the rotation angle of the output shaft 20 corresponding to the moving operation distance of the circuit breaker 1 is about 70 degrees. Also, a cam pin 57 is attached to the output shaft 20, and two position switches 5 are provided.
Reference numerals 8 and 59 are provided to operate with the cam pins 57 at both ends of the rotation angle of the output shaft 20.

Further, as shown in FIG.
The upper end of a vertically arranged rod 61 is connected to an arm 60 provided at the base end of the rod 61. An electromagnet 62 is arranged around the lower end of the rod 61. A spring 6 is provided between the arm 60 of the fixed lever 47 and the support 44.
3 is suspended, and when the electromagnet 62 is excited, the rod 61 moves downward to release the engagement between the roller 53 at the distal end of the fixed lever 47 and the concave groove 56 of the fixed plate 29,
On the other hand, when the electromagnet 62 is not excited, the biasing force of the spring 63 acts so that the fixed lever 47 presses against the surface of the fixed plate 29.

An equilibrium lever 64 is provided for connecting the base end of the lock lever 46 and the base end of the fixed lever 47. The balance lever 64 has a center of rotation in the center,
The left end (upper in FIG. 3) is the shaft pin portion 54 of the fixed lever 47.
The right end (lower in FIG. 3) is the shaft pin 5 of the lock lever 46.
0 respectively. Since the lock lever 46 and the fixed lever 47 are connected in this manner, the electromagnet 62
Of the fixing lever 47 and the fixing groove 29 of the fixing plate 29 by the excitation of
When the lock lever 46 is released, the lock lever 46 is engaged with the concave groove 27 of the lock plate 28, and the lock lever 46 is released from the engagement with the concave groove 27 of the lock plate 28. The fixing lever 47 engages with the concave groove 56 of the fixing plate 29 when it is moved.

The operation of the electric moving operation device having the above configuration will be described below.

First, when inserting the circuit breaker 1 in the pulled-out position, when the insertion operation switch is operated, the contactor for the insertion circuit operates and the electric motor 40 starts. In this state, since the lock lever 46 is not engaged with the concave groove 27 of the lock plate 28, the large sun gear 19 is free, and therefore, the rotation of the electric motor 40 is controlled by the worm wheel reducer from the gears 42 and 43. 13, small sun gear 17 and planetary gear 18
Is transmitted to the large sun gear 19 through the
Is idle, the output shaft 20 does not rotate, and the motor 40 is started with no load. At the same time, the electromagnet 62 is excited, whereby the rod 61 moves downward against the urging force of the spring 63, and the fixed lever 47 releases the fixed plate 29 to free the output shaft 20, and Fixed lever 4
The rotation of the lock 7 is transmitted to the lock lever 46 via the balance lever 64, and the roller 49 of the lock lever 46 rolls on the outer periphery of the lock plate 28 and when the groove 27 arrives, Engage.

When the lock plate 28, that is, the sun gear 19 is locked in this way, the rotation of the motor 40
The planetary gear 18 is transmitted from the gears 2 and 43 to the planetary gear 18 via the worm wheel reducer 13 and the small sun gear 17, and the planetary gear 18 performs a revolving shaft (output shaft) operation, and the output shaft 20 starts rotating. Thereafter, the electromagnet 62 is demagnetized and the fixed lever 47
Rolls on the circular arc surface of the fixed plate 29, and is held substantially at the same position as the operating position of the electromagnet 62.
The locked state of the large sun gear 19 continues, and the rotation of the output shaft 20 continues. Thus, the driving force of the electric motor 40 is controlled by the gears 42 and 43, the worm wheel reducer 13, the small sun gear 17, the revolving shaft (output shaft) of the planetary gear 18, and the output gear 3
0, the chain 33, the gear 32, the pull-out operation shaft 31, the pull-out lever 34, the rod 35, and the support arm 36, and the circuit breaker 1 moves in the insertion direction.

Next, when the electric motor 40 further rotates and the circuit breaker 1 reaches the insertion completed position, the roller 53 of the fixing lever 47 is in a state capable of engaging with the concave groove 56 of the fixing plate 29,
The fixed lever 47 rotates by the urging force of the spring 63 and engages with the concave groove 56. At the same time, the lock lever 46 is disengaged from the groove 27 of the lock plate 28, and the sun gear 1
Since 9 is free and idles, the movement of the circuit breaker 1 stops immediately. On the other hand, almost simultaneously with the engagement of the fixed lever 47 with the concave groove 56, the switch 59 operates to demagnetize the contactor, thereby disconnecting the motor 40 from the circuit. After that, the motor 40 continues idling for a while after the stop of the movement of the circuit breaker 1 due to the inertial force and stops.

The initial operation of the above insertion operation is as follows.
Is near the minimum, the moving speed becomes slow. When the breaker 1 approaches the insertion position, the contacts of the main circuit come into contact with each other and the insertion load increases sharply. At this time, the insertion force is reduced because the pull-out lever 34 is at a position close to the front horizontal position. Is done.

On the other hand, in the pull-out operation of the circuit breaker 1, the pull-out contactor is operated by operating the pull-out operation switch, and the motor 40 rotates in the opposite direction to the insertion operation, so that the operation reverse to the above-described insertion operation is performed. , The circuit breaker 1 moves in the pulling-out direction. In this pulling-out operation, the pulling-out load is large at the beginning, and is reduced at the end only by the own weight load of the circuit breaker 1.

According to this embodiment, as the one-stage speed reducer,
Since the worm wheel reducer 13 which is small and easily obtains a large reduction ratio is used, and the planetary gear reducer 14 having a large transmission torque is used in the subsequent stage, the output torque and the reduction ratio are large as a whole. A simple electric moving operation device can be obtained.

Further, the pull-out lever 34 and the support arm 3
6 is set so as to be horizontal and straight when stopped, and the rotation angle of the drawer lever 34 is configured to be approximately 180 degrees, so that the driving force in the vicinity of the initial and final stages of the moving operation is greatly reduced. It is possible to reduce the impact at the time of driving and at the time of stopping. In addition, the device can be stably held even when a large external force due to an impact or earthquake due to the operation of the device is applied, and the load on the drive device can be reduced. can do.

Further, the electric moving operation device is provided with three axes of an input shaft, an output shaft and a differential shaft, and these three axes are arranged in the same direction and in the same plane. The input shaft serving as the central shaft of the planetary gear reducer 14 and the wheel gear shaft serving as the output shaft of the worm wheel gear reducer 13 can be configured as a single shaft, so that they are continuously connected as a whole, and the width dimension is reduced. An electric moving operation device that is reduced in size and easy to assemble can be obtained.

In the above embodiment, the support arm is supported by the opening / closing device, and the electric moving operation device is fixed to the support cart of the circuit breaker.
It is also possible to adopt a configuration in which the support arm is supported by a support cart of the circuit breaker, and the electric moving operation device is fixed to a fixed frame of the opening / closing device.

[0031]

As described above, according to the present invention, a planetary gear reducer is provided between an electric motor serving as a drive source and an output shaft.
Since the rotational force is transmitted to and cut off from the output shaft by restraining and releasing the differential shaft of the planetary gear reducer, the drive motor greatly fluctuates in the rotational speed-rotational force characteristic due to the fluctuation of the operation voltage. Even if the load fluctuates, the drive source can be reliably cut off as soon as the stop position is reached, so that the stop accuracy is high, and the motor can be started with no load. An electric moving operation device capable of preventing an impact load on the electric motor is obtained.

Further, since the engaging and releasing operations between the concave groove of the fixing plate and the fixing lever and between the concave groove of the locking plate and the locking lever are performed in synchronization, the driving state from the restrained state and the locking state from the driving state are restrained. The state can be switched in a short time, the stop position accuracy is high, and stable position accuracy can be maintained even when an external force is received except during the movement operation including immediately after the movement operation.

[Brief description of the drawings]

FIG. 1 is a partial front view of an electric moving operation device according to an embodiment of the present invention (as viewed in the direction of arrows CC in FIG . 11);
(Fig.)

FIG. 2 is a side view of the electric moving operation device according to one embodiment of the present invention.

FIG. 3 is a partial plan view of the electric moving operation device according to one embodiment of the present invention.

FIG. 4 is a partial side view of the electric moving operation device according to one embodiment of the present invention.

FIG. 5 is a partial side view of the electric moving operation device according to one embodiment of the present invention.

FIG. 6 is a partial perspective view of an electric moving operation device according to an embodiment of the present invention.

FIG. 7 is an overall configuration diagram of an electric moving operation device according to an embodiment of the present invention.

FIG. 8 is an overall configuration diagram of a conventional electric moving operation device.

FIG. 9 is a sectional view of a conventional electric moving operation device.

FIG. 10 is a diagram showing a cross section taken along line AA of FIG. 1;

FIG. 11 is a partial cross-sectional view of FIG.

[Explanation of symbols]

 Reference Signs List 1 breaker 14 planetary gear reducer 17 small sun gear 18 planetary gear 19 large sun gear 20 output shaft 27 concave groove 28 locking plate 29 fixing plate 40 electric motor 46 locking lever 47 fixing lever 61 rod 62 electromagnet 63 spring 64 balance lever

Claims (1)

(57) [Claims] 1. A driving force of a motor as a driving source is input to an input shaft,
Three differential shafts composed of an output shaft and a large sun gear shaft
Transmission to the output shaft via a planetary gear reducer
In addition, the output shaft is controlled by reversibly controlling the motor.
Operate connected electrical equipment back and forth in a certain section
An electric moving operation device for an electric device, wherein the device moves integrally with the output shaft and moves the electric device.
Grooves are formed at positions corresponding to the start point and end point of the moving section.
A fixing plate, the fixing plate being engaged with the concave groove of the fixing plate.
And the fixing plate is disengaged when the electric device is moved.
Braking means comprising a fixed lever for releasing the gear, and a plurality of concave grooves formed at predetermined intervals on the outer periphery of the large sun gear
The lock plate and the recessed groove of the lock plate.
A locking lever that engages when moving the pneumatic device and releases when stopped
And restraining means consisting, Misao also operated in releasing direction of the lock lever in the engagement direction
Operating means; and the locking lever when the fixing lever releases the fixing plate.
Is engaged with the lock plate, and the fixing lever is
When the lock lever is engaged, the lock lever releases the lock plate.
A connecting hand for connecting the fixing lever and the lock lever.
An electric moving operation device for electric equipment, comprising: a step ;