JP4133228B2 - Circuit breaker electric operation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric operating device for a circuit breaker, and more particularly to a storage technology for a closing spring of an electric operating device that opens and closes a circuit breaker by storing and releasing a closing spring.
[0002]
[Prior art]
As a conventional electric operation device for a circuit breaker, for example, a device shown in FIG. 9 is known (see Patent Document 1). Referring to FIG. 9, this electric operating device rotates independently on rotating shaft 102, gear 103 and operating roller mounting plate 105 having operating roller 104, and shaft 101 provided so as to rotate together with shaft 101. ratchet lever 106 is provided so as, ratchet lever 106 and the feed, respectively is biased to engage with rotatably mounted gear 103 on the fixed member claw 107 and fixing claw 108, motor 109, illustrated by the rotation of the electric motor 109 A link member 110 that rotates and swings the ratchet lever 106 by being displaced in the vertical direction , a fixed member 111 at one end, a closing spring 113 attached to a pin 112 on the rotating plate 102, and an opening / closing operation handle of a circuit breaker A slide plate 115 for operating 114 is provided.
[0003]
FIG. 9 shows a state where the closing spring 113 is released and the circuit breaker is closed. This circuit breaker opening operation is performed in parallel with the storing operation of the closing spring 113. That is, when the electric motor 109 is driven, the ratchet lever 106 rotates and swings clockwise and counterclockwise. When the motor 109 is rotated counterclockwise, the feed claw 107 rotates the gear 103 counterclockwise by one tooth to thereby turn the closing spring 113. Accumulate a little. When the ratchet lever 106 rotates clockwise, the fixed claw 108 meshes with the gear 103 to prevent the gear 103 from reversing due to the release spring 113 being released. This operation is repeated, and when the shaft 101 is aligned so as to be positioned between the fixing member 111, which is the attachment portion of the closing spring 113, and the pin 112, the closing spring 113 acts to release the force. However, rotation of the shaft 101 is prevented by a latch mechanism (not shown), and the stored state of the closing spring 113 is maintained.
[0004]
During the above-described energy storing operation, the operation roller mounting plate 105 rotates counterclockwise together with the shaft 101, and the operation roller 104 pushes the open contact surface 116 formed on the slide plate 115 to move the slide plate 115 downward in the figure. Slide. The circuit breaker opening / closing operation handle 114 moves downward along with the slide plate 115 to open the circuit breaker. The closing operation of the circuit breaker is performed by releasing the closing spring 113. That is, by releasing the latch that maintains the stored state of the closing spring 113, the shaft 101 rotates counterclockwise at high speed, and the operation roller 104 pushes the closing contact surface 117 of the slide plate 115 to slide the slide plate 115. Slide upward in the figure . Along with this slide plate 115, the circuit breaker opening / closing operation handle 114 moves upward as shown in the figure, and the circuit breaker is closed.
[0005]
[Patent Document 1]
JP-A-5-217485 [0006]
[Problems to be solved by the invention]
As described above, the conventional circuit breaker electric operation device has a structure that uses a ratchet mechanism by rotating the electric motor. In addition, there are problems that the sound generated when the feed claw 107 and the fixed claw 108 mesh with or slide on the gear 103 are uncomfortable, and that the structure is complicated and the shape becomes large.
[0007]
Accordingly, an object of the present invention is to provide a small circuit breaker electric operation device capable of suppressing unpleasant noise and storing a closing spring in a short time.
[0008]
[Means for Solving the Problems]
In order to solve the above problem, the present invention rotates a closing spring and a rotating plate that are mounted on a rotating plate whose one end is mounted on a fixed member and the other end rotates in one direction, and whose rotational axis is off. An electric motor for accumulating the closing spring, a gear device interposed between the electric motor and the rotating plate, a latch mechanism for preventing rotation of the rotating plate in the releasing direction at a position where the closing spring is released, A slide plate for operating the operation handle of the circuit breaker, and a cam mechanism for following the rotation of the rotary plate. The gear device allows a free rotation of the rotating plate when the latch mechanism is disengaged, and when the electric motor drives the gear device, the gear device rotates the rotating plate and stores the charging spring in the one-way. The cam mechanism including the bearing moves the slide plate in the OFF direction when the rotating plate rotates so as to accumulate energy, and moves it in the ON direction when freely rotating so as to release energy.
Further, the gear device includes an electric motor side gear disposed on the electric motor side, a shaft integrated with the electric motor side gear, a rotating plate side gear disposed on the rotating plate side and supported by the shaft. Is included. Further, the one-way bearing is provided between the shaft and the rotary plate side gear, and a driving force is applied from the motor side gear so that the rotary plate is rotated in the accumulating direction of the closing spring by the electric motor. In this case, the rotating plate side gear is rotated through the one-way bearing, the engagement of the latch mechanism is released, the rotating plate rotates in the releasing direction, and the driving force is applied from the rotating plate side gear. In this case, a configuration is adopted in which only the rotating plate side gear is rotated by the one-way bearing, and the shaft and the motor side gear are not rotated.
[0009]
With this configuration, Hozei force of the closing spring for rotating plate rotates freely is consumed by operating the operating handle of the circuit breaker without acting on such as an electric motor when the closing spring is Hozei. Further, the rotation of the electric motor contributes to storing the closing spring without waste, and since the use of the bearing can suppress the operation noise during the storing operation, it is not necessary to provide a member such as a feed claw, so that the size can be reduced. .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the examples shown in FIGS. Referring to FIG. 1, 1 is a circuit breaker, 2 is a rotatable handle for operating an opening / closing mechanism for contacting and opening an opening / closing contact of the circuit breaker 1, 3 is an electric operating device according to the present invention, 4 and Reference numeral 5 denotes a base and cover of the electric operating device 3, reference numeral 6 denotes a mounting plate for detachably attaching the electric operating device 3 to the surface of the circuit breaker 1, reference numeral 7 denotes an electric motor, and reference numeral 8 denotes a worm provided on a rotating shaft of the electric motor 7. , 9 is a worm wheel combined with the worm 8 to form a worm gear, 10 is a gear rotating with the worm wheel 9, 11 is a gear meshing with the gear 10, 12 is a gear rotating with the gear 11, 13 is a gear 11 and gear 12 14 is a gear that meshes with the gear 12, 15 is a gear that meshes with the gear 14, 16 is a cam, 17 is a shaft that integrally supports the gear 14 and the cam 16, and 18 is A pin provided eccentrically on the motor 16, 19 is a fixing member, 20 is a coil-shaped closing spring provided between the pin 18 and the fixing member 19, and 21 is a roller provided eccentrically on the gear 14, Reference numeral 22 denotes an operation plate that slides in the vertical direction shown in the figure while rotating the handle 2, and both 23 and 24 are provided on the operation plate 22 and come into contact with the roller 21 when the gear 14 rotates to show the operation plate 22 in the downward direction. In addition, an ON operation block and an OFF operation block to be slid in the upward direction shown in the figure , 25 and 26 are provided on the operation plate 22, a handle catch in which the handle 2 of the circuit breaker 1 is fitted between both, and 27 together with the gear 15 A support shaft 28 of the rotating gear 15 is a manual accumulator handle that is detachably attached to a hole formed in the support shaft 27. Reference numeral 29 denotes a printed wiring board including an electronic circuit for controlling the electric operating device 3, and reference numerals 30 and 31 denote photoelectric relays mounted on the printed wiring board 29.
[0011]
Referring to FIG. 2, 32 and 33 are an ON button and a trip button for turning on and tripping the circuit breaker 1, 34 is a hole for inserting a manual energy storage handle 28, and 35 is a circuit breaker by rotating. An indicator for indicating the state of the container 1, 36 is an indicator for indicating the state of the closing spring 20, 37 is a hole for operating a cylinder key for preventing ON operation both electrically and mechanically, and 38 is an electrical and mechanical device It is a tab for attaching a padlock that prevents the ON operation. When the indicator 35 points to “I”, “ ◯ ” and “ Δ ” marked on the cover 5, it means that the circuit breaker 1 is in the ON state, OFF state and trip state, respectively. When “CHARGED” and “DISCHARGED” are displayed, it means that the closing spring 20 is in the stored state and the non-stored state, respectively. Note that the indicator 35, the indicator 36, the cylinder key, and the padlock are not main parts of the present application, and thus description thereof is omitted.
[0012]
Referring to FIG. 3, 39 is an upper substrate attached to the upper portion of the base 4, 40 and 41 are first and second latch levers rotatably provided on the upper substrate 39, and 43 and 42 are respectively A spring 44 biases the first latch lever 40 and the second latch lever 41 in the clockwise direction, and 44 is an electromagnet. FIG. 3 shows a state in which the closing spring 20 is stored, and the line connecting the pin 18 that supports both ends of the closing spring 20 and the fixing member 19 is slightly to the left of the rotation center of the cam 16. The cam 16 is urged counterclockwise by the urging force of 20, and the engagement side 16 a engages with the engagement end 41 a of the second latch lever 41 so that the second latch lever 41 resists the spring 42. Thus, the pin 45 provided at the other end of the second latch lever 41 is engaged with the engagement side 40a of the first latch lever 40, and the first latch lever 40 is urged clockwise. Has been. The first latch lever 40 is prevented from rotating clockwise by a stopper (not shown). Further, a hexagon hole 27a for inserting a manual energy storage handle 28 is formed at the tip of the support shaft 27.
[0013]
4 and 5, the gear 11 and the shaft 13 are integrated by a keyway mechanism 46, and the shaft 13 is rotatably held between the hole 4a of the base 4 and the recess 39a of the upper substrate 39. Has been. Further, the one-way bearing 47 is provided between the shaft 13 supporting the gear 12 and the gear 12, the gear 12 when the shaft 13 total direction of the driving force two o'clock is applied via a gear 11 in FIG. 3 also it rotates, when the gear 12 total direction of the driving force two o'clock is applied has a structure in which the shaft 13 and the gear 11 only the gear 12 is rotated does not rotate. Further, the gear 15 and the support shaft 27 are supported between the protrusion 4b of the base 4 and the hole 39b formed in the upper substrate 39, and the shaft 17 is inserted into the cylindrical portion 4c formed in the base 4, and the gear 14 from above and below. And the cam 16 so as to sandwich the cylindrical portion 4c. The cam 16 is attached to the shaft 17 by a screw 48. The shaft 49 that supports the worm wheel 9 and the gear 10 is mounted between the upper substrate 39 and the base 4 by the hole 39c of the upper substrate 39 and the screw 50.
[0014]
Referring to FIG. 6, in the OFF state, the roller 21 is positioned slightly below the ON operation block 23, and the arc-shaped and strip-shaped white label 51 attached to the gear 14 is positioned away from the photoelectric relay 30. In addition, a rectangular strip-shaped white label 52 affixed on the operation plate 22 is directly under the photoelectric relay 31. Referring to FIG. 7, in the ON state, the roller 21 is positioned slightly above the OFF operation block 24, and the arc-shaped and strip-shaped white label 51 attached to the gear 14 is directly below the photoelectric relay 30. In addition, a rectangular strip-shaped white label 52 affixed on the operation plate 22 is located away from the photoelectric relay 31.
[0015]
The ON operation of the electric operating device 3 of the present invention having such a structure will be described with reference to FIG. 1, FIG. 3, and FIG. As shown in FIG. 3, when the circuit breaker 1 is in the OFF state, the closing spring 20 is in the stored state. When an ON command is issued electrically in this state, the electromagnet 44 is excited and the pin 53 moves to the right, and the operating piece 54 attached to the pin 53 rotates the first latch lever 40 counterclockwise. As a result, the engagement between the engagement side 40a of the first latch lever 40 and the pin 45 is released, the second latch lever 41 rotates counterclockwise, and the engagement end 41a and the engagement side 16a of the cam 16 8 is released, the cam 16 rotates counterclockwise, and the full length of the closing spring 20 becomes the shortest as shown in FIG. In the releasing operation of the closing spring 20, the gear 11 that meshes with the worm gear is not rotationally biased by the action of the one-way bearing 47, so that the rotation of the cam 16 is not hindered. Then, referring to FIG. 6, when the cam 16 rotates counterclockwise, the roller 21 pushes the ON operation block 23 and moves the operation plate 22 upward to move the handle 2 to the ON position. It will be in the ON state of FIG.
[0016]
Next, an operation for turning off the ON state will be described. In the state of FIG. 7 , the light emitted from the photoelectric relay 30 by the rotation command of the electric motor 7 is reflected by the label 51 and received by the photoelectric relay 30 to rotate the electric motor 7. In FIG. 8, the worm 8 and the worm wheel are rotated. 9, the gear 10 rotates counterclockwise, the gear 11 that meshes with the gear 10 rotates clockwise with the gear 12 via the shaft 13 and the one-way bearing 47, and the gear 14 that meshes with the gear 12 rotates counterclockwise. Accumulate 20 When the line connecting the pin 18 that supports both ends of the closing spring 20 and the fixing member 19 reaches the rotation center of the cam 16, the closing spring 20 is further rotated counterclockwise by its own releasing force, and the engaging side of the cam 16 is engaged. 16a engages with the engagement end 41a of the second latch lever 41, and the state shown in FIG. Referring to FIG. 7, when the cam 16 rotates counterclockwise, the roller 21 pushes the OFF operation block 24 to move the operation plate 22 downward, so that the handle 2 moves to the OFF position. Become. As the operation plate 22 moves, the label 52 moves directly below the photoelectric relay 31 and the motor 7 stops rotating.
[0017]
In the ON state, the operation plate 22 is in a state of being restrained by the position of the handle 2 of the circuit breaker 1. For this reason, when the circuit breaker 1 automatically trips and the handle 2 moves downward, the operation plate 22 also moves downward and moves to a trip position intermediate between the ON position and the OFF position. In this movement, the ON operation block 23 is in a positional relationship that does not come into contact with the roller 21, so that the movement of the operation plate 22 is not hindered. The reset operation for moving the handle from the trip state to the OFF position is the same as the OFF operation described above.
[0018]
Note that an OFF operation or a reset operation can be manually performed instead of the operation of rotating the electric motor 7 described above. That is, in FIG. 8, when the manual energy storage handle 28 is attached to the hexagon hole 27a of the support shaft 27 and the manual energy storage handle 28 is rotated clockwise, the gear 15 rotates clockwise and the gear 14 rotates counterclockwise. By rotating, the cam 16 rotates and the closing spring 20 can be stored. At this time, the operation plate 22 also moves in the OFF direction in the same manner as the accumulating operation by the electric motor. Although not shown, by holding the support shaft 27 with a one-way bearing, the gear 14 is rotated counterclockwise when the manual energy storage handle 28 is rotated clockwise, and is turned on when the manual energy storage handle 28 is released. The gear 14 is prevented from rotating in the clockwise direction by the releasing force of the spring 20. With this configuration, the closing spring 20 can be stored by rotating the manual storage handle 28 in the clockwise and counterclockwise directions.
[0019]
Further, since it is not the main part of the present application, a detailed description and illustration are omitted, but a link mechanism is provided to rotate the first latch lever 40 counterclockwise when the ON button 32 on the front surface is pressed. When the trip button 33 is pressed, a link mechanism for operating a trip button (not shown) provided in the circuit breaker 1 is provided so that the circuit breaker 1 can be tripped manually. .
[0020]
【The invention's effect】
Since the present invention is implemented in the form described above and includes a one-way bearing as an energy storage mechanism of the input spring, it contributes to storing the input spring without waste in rotation of the electric motor and shortens the storage time. and the monitor can be an effect such that the energy storing operation sound can be provided an electric operating device of small compact circuit breaker.
[Brief description of the drawings]
FIG. 1 is a side view for explaining an essential part of an inside when an embodiment of an electric operating device according to the present invention is mounted on a circuit breaker.
FIG. 2 is a plan view of the electric operating device of FIG. 1 as viewed from the front.
3 is a plan view showing a main part inside the electric operating device of FIG. 2; FIG.
4 is a cross-sectional view of a main part viewed from below in FIG. 3 for explaining a mounting state of a gear group of the electric operating device in FIG. 1;
5 is a cross-sectional view of a main part viewed from the left in FIG. 3 for explaining a state in which the gear group of the electric operating device in FIG. 1 is mounted.
6 is a plan view for explaining the positional relationship among the cam 16, the operation plate 22, and the photoelectric relay in the OFF state of the electric operating device of FIG. 1. FIG.
FIG. 7 is a diagram corresponding to FIG. 6 in an ON state.
FIG. 8 is a plan view showing the main part when the closing spring is released.
FIG. 9 is a plan view showing a main part of an electric operating device for a conventional circuit breaker.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Circuit breaker, 2 Handle, 3 Electric operating device, 4 Base, 4a hole, 4b Protrusion, 4c Cylindrical part, 5 Cover, 6 Mounting plate, 7 Electric motor, 8 Worm, 9 Worm wheel 10, 11, 12, 14 , 15 Gear, 13, 17 shaft, 16 cam, 16a engagement side, 18 pin, 19 fixing member, 20 closing spring, 21 roller, 22 operation plate, 23 ON operation block, 24 OFF operation block, 25, 26 Handle catch , 27 Support shaft, 27a Hexagonal hole, 28 Manual energy storage handle, 29 Printed wiring board, 30, 31 Photoelectric relay, 32 ON button, 33 Trip button, 34, 37 hole, 35, 36 Indicator, 38 Tab, 39 Upper substrate , 39a dent, 39b hole, 39c hole, 40 first latch lever, 40a engagement side, 41 second latch lever, 41a If end 42, 43 spring, 44 an electromagnet, 45 pin, 46 keying mechanism, 47 one-way bearing, 48, 50 screws, 49 shaft, 51 and 52 labels, 53 pin, 54 the operation piece.

Claims (1)

In the electric operation device that operates the operation handle of the circuit breaker,
A closing spring mounted on a rotating plate whose one end is attached to a fixed member and the other end rotates in one direction, at a position off its rotational axis,
An electric motor configured to store the closing spring by rotating the rotating plate;
A gear device interposed between the electric motor and the rotating plate;
A latch mechanism for preventing rotation of the rotating plate in the releasing direction at a position where the closing spring releases the force,
A slide plate that operates an operation handle of the circuit breaker, and a cam mechanism that follows the rotation of the rotating plate,
The gear device allows free rotation of the rotating plate when the latch mechanism is disengaged, and causes the gear device to rotate the rotating plate to store energy in the closing spring when the electric motor drives the gear device. Including one-way bearings,
The cam mechanism moves the slide plate in the OFF direction when the rotating plate rotates so as to store energy, and moves the slide plate in the ON direction when freely rotating so as to release energy. age,
Furthermore, the gear device comprises:
A motor-side gear disposed on the motor side;
A shaft integrated with the motor side gear;
A rotating plate side gear disposed on the rotating plate side and supported by the shaft;
The one-way bearing is provided between the shaft and the rotary plate side gear,
When a driving force is applied from the electric motor side gear so that the electric motor rotates the rotating plate in the storing direction of the closing spring, the rotary plate side gear is rotated via the one-way bearing,
When the engagement of the latch mechanism is canceled and the rotating plate rotates in the releasing direction and a driving force is applied from the rotating plate side gear, only the rotating plate side gear is rotated by the one-way bearing, An electric operation device for a circuit breaker in which a shaft and the motor side gear do not rotate.

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