CN1022783C

CN1022783C - Electric operation device for auto-switch

Info

Publication number: CN1022783C
Application number: CN 90107403
Authority: CN
Inventors: 郭行干; 郭黎
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-08-29
Filing date: 1990-08-29
Publication date: 1993-11-17
Anticipated expiration: 2005-08-29
Also published as: CN1059423A

Abstract

The present invention relates to an electric operation device for a power switch with middle and small capacity. The electric operation device uses a permanent-magnet synchronous speed-reducing motor with small scale and low cost as motive power, a shifting fork or other simple connection mechanisms are additionally arranged on a projecting shaft of the motor to push a switch handle and realize electric operation. The present invention has the advantages of simple structure, reliable operation, low cost, expense saving, reliable running and no consumption of electric energy, and the present invention is suitable for a DZ type plastic casing circuit breaker; after the device is installed, automatic switching-on and switching-off and timing power cut and transmission and automatic switching-in after failure can be realized according to the requirement of a distribution circuit without additionally adding the alternating current contactor.

Description

Electric operation device for auto-switch

The invention belongs to a kind of electrically operated device of power switch.

Present medium and small power consumer regularly stops to send in the electric planned power consumption and promotes to prevent in the personal earth leakage protective device that gets an electric shock that requirement can automatic brake separating and combined floodgate on middle low capacity power distribution circuit in implementation.About the electrically operated device that on the circuit power switch is installed additional, the existing CD type motor-operating mechanism of producing as Wuxi micromachine factory.It is to drive an eccentric wheel by series excited machine through decelerator, and by eccentric wheel motor being rotatablely moved is transformed into reciprocating motion and comes the pull switch handle to move forwards or backwards to realize that switch closes a floodgate or separating brake.Correct in order to guarantee switch knob reciprocating motion location, necessarily require eccentric wheel processing and degree of precision is installed.After preventing that motion from putting in place, the machinery inertial overshoot is provided with brake gear.Thereby complex structure, processing difficulties, size are big, the production cost height.So it only is applicable on the type automatic switch big or bigger than normal, is not suitable for middle-size and small-size automatic switch.For middle-size and small-size automatic switch, commonly used is to install A.C. contactor on circuit additional now, realizes automatic deciliter by contactor.Adopt this way will add an electric equipment, raise the cost, it is also reliable and stable inadequately to work.

The task of the invention is to adopt cheap permanent magnet claw pole can just reverse the deceleration synchronization motor to replace series excited machine, and design bindiny mechanism makes the just contrary reciprocating motion that changes switch knob into of motor, realize the electric operating of switch, reach small-sized, inexpensive, convenient, the reliable purpose of operating means.

The design of the invention is that the projecting shaft that permanent magnetism can just reverse the deceleration synchronization motor is connected with custom-designed bindiny mechanism, the other end of bindiny mechanism then with the switch knob interlock.The motor rotation can drive bindiny mechanism moves forwards or backwards switch knob.When handle motion is obstructed behind certain top, motor is by stall, and the stall rear motor just can automatic reverse winding, makes handle change the direction of motion, and is same, and when handle motion is obstructed behind another top, motor is also by stall, and motor is automatic reverse winding again just.Like this, motor just reverses the reciprocating motion that can change switch knob easily into.By being contained in the auxiliary contact on the switch, after finishing the combined floodgate task, promptly cut off motor combined floodgate circuit, make switch be parked in closing position; After finishing the separating brake task, promptly cut off motor separating brake circuit, make switch be parked in the separating brake position.Like this, this device is realized the electric operating to appliance switch fully.

This device can make processing and installation accuracy greatly reduce because employing is just reversing synchronous machine, and after switch knob moved to the top, motor just reversed and makes the switch knob counter motion, does not need cam gear; And the connecting elements that design is adopted is simple in structure, makes easily; Again because motor and the coupling member size is little, inertia is little, thereby brake gear needn't be installed; Motor can adopt micromachine, and structure is very simple, brushless, no shift capacitor, reliable operation.

This motor can extensively be used in a series of household electrical appliance such as tray of microwave oven, and output is big, versatility is high, price is very cheap.Therefore, this device advantage be simple in structure, volume is little, easy to manufacture, reliable operation convenient, production cost is low.

The embodiment of creation scheme that invention will be further ex-plained with reference to the appended drawings:

Fig. 1 is the structural representation of this programme example 1.

Fig. 2 is a circuit diagram.

Fig. 3 is the structural representation of this programme example 2.

Be illustrated in figure 1 as example 1.Be installed in the motor 2 in the electrically operated device shell 1, select for use the single-phase permanent pawl utmost point can just reverse the deceleration synchronization motor, for example, the 49TYJ type motor that Ningbo of Zhejiang timer head factory is produced.Because this device is applicable to middle-size and small-size automatic switch, required motive force is less, is used in not frequent operation occasion as another, and movement velocity can be low.The service condition of this low speed, low thrust makes this device allow to select for use micropower motor inexpensive, low power consumption.This kind electric machine structure characteristics are that a p-m rotor is arranged, and a stator winding has the pawl utmost point of going out on the shell of double as yoke in the middle of the two.Extremely go up the generation pulsating field when the stator winding electrifying rear solid end, after rotor is energized vibration, departs from the magnetic neutral position at random and just be pulled into synchronously.

Therefore, this electric motor starting direction of rotation is indefinite, just as can automatic reverse winding by stall.Shift fork 3 is housed on the projecting shaft of motor 2, and the prong of shift fork 3 is stuck on the switch knob 4, and the shell 1 of electrically operated device is contained in the outside of automatic switch shell 5.Be provided with the discrepancy end A of power transmission line in switch housing 5 both sides.

As shown in Figure 2, switch knob-6, opening button-7, the auxiliary contact of automatic switch-8, the position of the switch is at gate-dividing state shown in the

figure.Button

6 and 7 is manual (as embodiment), also can replace

button

6 and 7 by Automation Elements, realizes automatic brake separating or combined floodgate.For example, when requiring regularly to stop sending electricity, can replace

button

6 and 7, can realize regularly stopping sending by the electric contact of timing clock.

The course of work by Fig. 1 and Fig. 2 illustrated example 1:

When pressing switch knob 6, the combined floodgate circuit is connected, and motor 2 begins rotation, and shift fork 3 drives switch knob 4 motions.Because the motor direction of rotation is any, establishing motor earlier just changes, switch knob promptly moves toward the combined floodgate direction, when moving to certain position forward, the quick switching-on mechanism action of automatic switch, switch is closed a floodgate rapidly, and auxiliary contact 8 cuts off the combined floodgate circuit rapidly, connects the separating brake circuit, the motor stall, the combined floodgate task is finished in the switch knob stop motion.If press the counter-rotating of switch knob 6 motor, shift fork 3 drives switch knob and moves backward, collides with shell 5 behind the handle motion certain distance, and motion is obstructed, and just changing into automatically behind the motor stall changes, and handle changes into and travelling forward, and finishes the combined floodgate task.

When requiring separating brake after closing a floodgate, then press opening button 7, motor 2 counter-rotatings drive handle 4 and move backward, when moving to certain position, and automatic switch quick acting switching-off mechanism action, the rapid separating brake of switch, auxiliary contact 8 cuts off the separating brake circuit and finishes the separating brake task.If motor is just to change the drive handle to travel forward, to collide with shell 5 behind the handle motion certain distance, motion is obstructed, and changes counter-rotating behind the motor stall automatically into, and handle changes motion backward into, finishes the separating brake task.

Be illustrated in figure 3 as example 2.Motor 2 is contained in the automatic switch shell 5, and connecting lever 9 is housed on the projecting shaft of motor, and the other end of connecting lever is connected with an end of connecting rod 10, and the other end of connecting rod then is connected with the support 11 of floatless switch handle.

Motor 2 rotations make connecting lever swing and drivening rod pull switch handle bracket that switch knob is moved forwards or backwards.Course of action and the principle thereof of finishing combined floodgate or separating brake task are identical with example 1.

The shell 1 of example 1 electrically operated device is contained in the outside of automatic switch shell, claims fitted outside.It is applicable to and transforms and install and use easily in the transformation of existing a large amount of automatic switch DZ10 that use and similar breaker of plastic casing.

Example 2 electrically operated devices are contained within the automatic switch shell 5, claim built-in.It is applicable to the automatic switch with big shell, and for example on DZ10L and the similar breaker of plastic casing, its good looking appearance is suitable for the integrated production of factory.

This device has now produced sample, and by tests such as life-spans, the result shows reliable in action, steady, and noise is little.

Claims

1, a kind of electrically operated device of middle-size and small-size automatic switch is provided with decelerator, and feature of the present invention is that an end of shift fork [3] is installed in the single-phase permanent pawl utmost point and can just reverses on the output shaft of deceleration synchronization motor, and other end prong is stuck on the switch knob [4].

2, a kind of electrically operated device of middle-size and small-size automatic switch, be provided with decelerator, feature of the present invention is that connecting lever (9) one ends are connected with the output shaft that the single-phase permanent pawl utmost point can just reverse the deceleration synchronization motor, the other end is connected with an end of connecting rod (10), and the other end of connecting rod then is connected with the support (11) of floatless switch handle (4).