JP3221156B2 - Electric circuit breaker operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric operating device for a circuit breaker capable of remotely operating a handle of the circuit breaker.

2. Description of the Related Art FIGS. 6 to 8 show an electric operation device for a circuit breaker of this kind. The circuit breaker 1 operated by this device has a handle 2 on the upper surface, and has terminals 3, 3,... On the power supply side and the load side at both ends of the handle 2 in the operation direction. The electric operating device 4 of the circuit breaker 1 is roughly enclosed by a housing 5 comprising a base 6 and a cover 7 having substantially the same size as the circuit breaker 1 so as to be disposed on one side of the circuit breaker 1. Is determined. The housing 5 also has signal terminals 8a, 8b and 8c for receiving external signals, that is, signals for ON, OFF and common use. The base 6 may have a size including the circuit breaker 1 in a plan view in consideration of the arrangement in the circuit breaker 1. Inside the housing 5, there are provided a motor 10, which is a driving source, capable of forward and reverse rotation, and gears 11, 12 for transmitting the rotation to a screw shaft 15, which will be described later.
A drive unit 9 comprising an external circuit, an electric circuit unit 13 formed on a printed wiring board 14 for outputting a drive signal to an electric motor 10 in response to an external signal, and a gear disposed in parallel with the operating direction of a handle 2 of the circuit breaker 1. 12 rotated screw shaft 15, screw shaft
A moving body 16 having a screw hole to be screwed with the moving body 16 and moving in parallel with the operation direction of the handle 2 of the circuit breaker 1 by rotation of the screw shaft 15, and guide shafts 17, 17 for movably guiding the moving body 16
, Bases 18, 18, etc., which are arranged to support both ends of the guide shaft 17. The transmission of the rotation of the electric motor 10 to the moving body 16 is performed as follows. That is, the screw shaft 15 having a male screw carved into the screw hole of the moving body 16 is screwed. The screw shaft 15 is rotatably supported between the bases 18 and 18,
A driven gear 12 formed as a bevel gear is attached to the end. On the other hand, a drive gear 11 formed as a bevel gear meshing with a driven gear 12 is attached to an output shaft 10a of the electric motor 10. Further, switches SW1, SW2, SW3, and SW for ON, OFF, reset, and handle engagement detection are provided at predetermined positions.
4 is provided, and detects when each operating section provided at a position corresponding to the moving body 16 and an operating member 19 described later reaches a predetermined position. Thus, when an external signal is input to the signal terminals 8a, 8b, 8c, the electric circuit unit 13 outputs a drive signal to the electric motor 10 according to the open / close state of each switch SW1, SW2, SW3, and the electric motor 10
Is rotated in a predetermined direction. Then, the rotation is transmitted from the driving gear 11 to the driven gear 12, so that the screw shaft 15 rotates and the moving body 16 moves while being guided by the guide shafts 17, 17, and any of the switches SW1, SW2, SW3 Turn it over and stop. Reference numeral 19 denotes an operating member having a bifurcated engaging portion 20 having a base end 18a attached to the moving body 16 and engaging the handle 2 of the circuit breaker 1 at the distal end. That is, the operating member 19 operates the handle 2 by the operation of the moving body 16 described above.
FIG. 8 is a diagram showing a state where the screw shaft 15 is supported by the base 18. The screw shaft 15 has a small-diameter portion 15b at the distal end portion. The small-diameter portion 15b is fitted into a screw shaft fitting portion 22 provided on the base 18, and is connected to the driven gear 12. A retaining member 23 for the screw shaft 15 is inserted between the screw shaft fitting portion 22 of the base 18 and the driven gear 12. That is, the screw shaft fitting portion 22 of the base 18 is sandwiched between the retaining member 23 and the small diameter portion 15b of the screw shaft 15 and the step 15c at the base end.

In the electric operating device for a circuit breaker described above, the moving body moves in the operating direction of the handle of the circuit breaker along the guide shaft and the screw shaft, and is attached to the moving body. The operating member moves the handle to a predetermined position. At this time, if the guide shaft and the screw shaft are not level, the moving body cannot move smoothly. That is, a transmission loss occurs between the force for driving the moving body and the force for operating the handle, and a stronger driving force is required. In addition, in order to move the moving body smoothly, it is necessary to assemble the apparatus so that the horizontality of the guide shaft and the screw shaft does not change, which makes the assembling work difficult. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electric operation device for a circuit breaker that facilitates efficient operation of a steering wheel.

According to a first aspect of the present invention, there is provided an electric operating device for a circuit breaker, which may be disposed on one side of the circuit breaker and receives an external signal. An operating member for moving the handle of the circuit breaker to a predetermined position, a driving unit including a motor and a gear transmitting the rotation thereof, and an electric unit for receiving a external signal and outputting a driving signal to the motor. A circuit portion, a screw shaft disposed parallel to the operation direction of the handle of the circuit breaker, and rotated by a gear; and a screw hole screwed with the screw shaft. The rotation of the screw shaft operates the handle of the circuit breaker. A moving body that moves in parallel with the direction, a guide shaft that movably guides the moving body, a base that is disposed opposite to support both ends of the guide shaft, and a base end that is attached to the moving body and has a distal end. Circuit breaker handle In an electric operating device for a circuit breaker, comprising: an operating member having an engaging portion to be engaged; and a housing accommodating each member and projecting the operating member, the screw shaft is located on a side where a gear is located. The end of is supported by the base, and the intermediate portion is supported by a threaded portion with the moving body, so that the circuit breaker is disposed in parallel with the operating direction of the handle , The screw shaft is
It has a large diameter part that is screwed into the screw hole and a small diameter part that is connected to the gear.
And a step formed between the large diameter portion and the small diameter portion of the screw shaft;
With the axially inner end of the gear and the base near the drive unit
The provided screw shaft fitting portion is sandwiched .

According to the structure of the first aspect, the end of the screw shaft on the side where the gear is located is supported by the base, and the intermediate portion is supported by the threaded portion with the moving body. The end on the side opposite to the side where the gear is located can be a free end, and there is no need to achieve a levelness in accordance with the guide shaft.
Further, there is no need to dispose a retaining member for the screw shaft.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described below with reference to FIGS. Note that members having the same basic functions as those of the conventional example are denoted by the same reference numerals as those of the conventional example, and those members that are completely the same are omitted from the drawings. Circuit breaker 1
It has a handle 2 on the top surface, and the power supply side and load side terminals 3,3,
─. The electric operating device 4 of the circuit breaker 1 is provided with a base 6 having substantially the same size as the circuit breaker 1 as described in the prior art so that it can be disposed on one side of the circuit breaker 1. The outline of the housing 5 is roughly determined by the housing 5 including the cover 7. The housing 5 also has three signal terminals 8a, 8b, 8c for receiving external signals, that is, signals for ON, OFF, and common use. The base 6 may have a size including the circuit breaker 1 in a plan view in consideration of the arrangement in the circuit breaker 1. Inside the housing 5, a driving unit 9 including a motor 10 capable of rotating forward and backward as a driving source and gears 11 and 12 transmitting the rotation to a screw shaft 15 described later, and driving the motor 10 upon receiving an external signal An electric circuit portion 13 formed on a printed wiring board 14 for outputting a signal, a screw shaft 15 disposed in parallel with the operating direction of a handle 2 of the circuit breaker 1 and rotated by a gear 12, and screwed with a screw shaft 15. Moving body 16, which moves in parallel to the operating direction of the handle 2 of the circuit breaker 1 by rotation of the screw shaft 15 and guide shafts 17, 17 for movably guiding the moving body 16, It has bases 18, 18 and the like which are arranged to support both ends. The transmission of the rotation of the electric motor 10 to the moving body 16 is performed as follows. That is, the screw shaft 15 having a male screw carved into the screw hole of the moving body 16 is screwed. The screw shaft 15 has an end on the side where the electric motor 10 is located rotatably supported by the base 18, and has a driven gear 12 formed as a bevel gear attached to the end thereof, and an intermediate portion. Are supported by a threaded portion with the moving body 16.
On the other hand, a drive gear 11 formed as a bevel gear meshing with a driven gear 12 is attached to an output shaft 10a of the electric motor 10. In addition, at a predetermined position, for ON and OFF similar to the conventional one,
Switches for reset, reset and handle engagement detection
1, SW2, SW3, and SW4 are provided, and each of the operating parts provided at the corresponding positions of the moving body 16 and an operating member 19 to be described later is detected when it reaches a predetermined position. Thus, when an external signal is input to the signal terminals 8a, 8b, 8c, the electric circuit unit 13 outputs a drive signal to the electric motor 10 according to the open / close state of each of the switches SW1, SW2, SW3, and causes the electric motor 10 to move in a predetermined direction. Rotate. Then, the rotation is transmitted from the driving gear 11 to the driven gear 12, so that the screw shaft 15 rotates and the moving body 16 moves while being guided by the guide shafts 17, 17, and any of the switches SW1, SW2, SW3 Turn it over and stop. Reference numeral 19 denotes an operation member similar to that of the above-described conventional example. The base end is attached to the moving body 16 and the circuit breaker 1 is attached to the front end.
It has a bifurcated engagement portion 20 that engages with the handle 2 of the vehicle. That is, the operating member 19 operates the handle 2 by the operation of the moving body 16 described above. In the electric operating device 4 of the circuit breaker 1, the screw shaft 15 is supported such that the end on the side where the electric motor 10 is located is rotatable by the base 18,
Since the intermediate portion is supported by a threaded portion with the moving body 16 and is disposed in parallel with the operating direction of the handle 2 of the circuit breaker 1, the other end can be a free end. That is, since the screw shaft 15 does not need to be level with the guide shaft 17, it is easier to adjust the level at the time of assembly than before. Furthermore, since the possibility that the degree of horizontal deviation is reduced is reduced, the moving body 16 is easily moved smoothly, and the transmission efficiency of the driving force is improved. Next, a second reference example according to the present invention is shown in FIG.
A description will be given based on FIG. The members having the same basic functions as those of the first embodiment are denoted by the same reference numerals as those of the conventional example, and the description is omitted. To explain the different parts,
The electric operating device 4 of the circuit breaker 1 is mounted on a base 18 located on the free end side of the screw shaft 15 as shown in FIG.
And a run-out restricting portion 21 having an inner diameter larger than the outer diameter by a predetermined length. Such a run-out control part 21 is provided, and the screw shaft
By inserting the small-diameter portion 15b formed at the free end side of the free end 15 of the screw 15, the degree of looseness of the screw shaft 15 caused by the driving of the driving unit 9 is limited to a level that does not hinder the smooth movement of the moving body 16. be able to. For example, it is preferable to keep the rattling degree at about 5 to 10%. In this embodiment, the diameter of the small diameter portion 15b of the screw shaft 15 is set to about 5 mm, the inner diameter of the run-out restricting section 21 is set to about 5.3 mm, and the degree of backlash is kept to about 6%. Next, an embodiment of the present invention will be described with reference to FIG. Note that members having the same basic functions as those of the first reference example are denoted by the same reference numerals as in the conventional example, and description thereof is omitted. Explaining the different parts, the electric operating device 4 of the circuit breaker 1 has a large diameter portion 15a in which the screw shaft 15 is screwed into the screw hole of the moving body 16 and a small diameter portion 15b connected to the driven gear 12. The stepped portion 15c formed between the large-diameter portion 15a and the small-diameter portion 15b of the screw shaft 15 and the axially inner end 12a of the driven gear 12 form a base 18 on the side closer to the drive unit 9. , The screw shaft fitting portion 22 provided therein is sandwiched. With such a configuration, it is not necessary to dispose a retaining member between the screw shaft fitting portion 22 of the base 18 and the driven gear 12, and it is possible to reduce the number of parts and improve economy and assemblability. .

According to the first aspect of the present invention, the end of the screw shaft on the side where the gear is located is supported by the base, and the intermediate portion is screwed with the moving body. Since it is supported by the portion, the end opposite to the side where the gear is located can be a free end, and there is no need to achieve horizontality in accordance with the guide shaft. Therefore, the possibility that the smoothness of the moving body is impaired due to the deviation of the horizontality is reduced, and the steering operation can be efficiently performed easily. See you
There is no need to dispose a retaining member for the spindle. Therefore, the part
The number of parts can be reduced to improve economy and assembly.
Wear.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first reference example according to the present invention , in which a cover is omitted so that the inside of the apparatus can be seen.

FIG. 2 is a longitudinal sectional view thereof.

FIG. 3 is a plan view showing a second reference example according to the present invention , in which a cover is omitted so that the inside of the apparatus can be seen.

FIG. 4 is a sectional view showing a main part thereof.

FIG. 5 is a sectional view showing a main part of one embodiment of the present invention.

FIG. 6 is a perspective view showing a conventional example.

FIG. 7 is a plan view showing a state where the cover is removed.

FIG. 8 is a sectional view of a main part showing support of the screw shaft by the base.

[Explanation of symbols]

 1 Circuit breaker 2 Handle 4 Electric operating device 5 Housing 9 Drive unit 10 Motor 11 Drive gear 12 Driven gear 12a End 13 Electric circuit unit 15 Screw shaft 15a Large diameter part 15b Small diameter part 15c Step 16 Moving body 17 Guide shaft 18 Base 19 Operating member 20 Engagement part 21 Run-out restriction part 22 Screw shaft fitting part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model 1-206533 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01H 71/70 H01H 75/02

Claims (1)

(57) [Claims] 1. An electric motor and its rotation, wherein an operating member which can be disposed on one side surface of the circuit breaker and operates by receiving an external signal moves a handle of the circuit breaker to a predetermined position. A drive unit consisting of a gear that transmits an electric signal, an electric circuit unit that receives an external signal and outputs a drive signal to the electric motor, and a screw shaft that is arranged in parallel with the operating direction of the handle of the circuit breaker and rotated by the gear. A moving body having a screw hole screwed with the screw shaft and moving in parallel with the operation direction of the handle of the circuit breaker by rotation of the screw shaft, a guide shaft for movably guiding the moving body, and both ends of the guide shaft A base provided opposite to the supporting member, an operating member having a base end attached to the moving body and having an engaging portion at the distal end for engaging with a handle of the circuit breaker; And a housing with an operating member protruding. , An end of the screw shaft on the side where the gear is located is supported by a base, and an intermediate portion is supported by a threaded portion with the moving body. it by, which is disposed parallel to the operating direction of the circuit breaker handle, it the
The spindle is connected to the large-diameter part that engages with the screw hole of the moving body and the gear.
Formed between the large diameter part and the small diameter part of the screw shaft.
Of the gear and the axially inner end of the gear
An electric operating device for a circuit breaker, wherein a screw shaft fitting portion provided on a base on a near side is sandwiched .