CN101488648B

CN101488648B - Locking apparatus for extraction type circuit breaker

Info

Publication number: CN101488648B
Application number: CN2009100960698A
Authority: CN
Inventors: 黄炳根; 邵忠
Original assignee: 李建民
Priority date: 2009-02-06
Filing date: 2009-02-06
Publication date: 2011-01-05
Anticipated expiration: 2029-02-06
Also published as: CN101488648A

Abstract

The invention relates to a locking device of drawout breakers, comprising two supports on a base plate, a sliding plate on the base plate and in front of the supports, a transmission lead screw passing through the supports and connected with the sliding plate, a plurality of slots circumferentially arranged on a basic part near the transmission lead screw, a square shaft is arranged between the supports, three grooves are arranged on the right side of the square shaft, inverted sloped edges are arranged at the openings of the grooves, a de-locking button is arranged on the rear support and drives a chuck plate to move by a de-locking shaft which is square, a square hole is arranged on the chuck plate, wherein the de-locking shaft passes through the square hole to insert into the front support, a compression spring is arranged on the front support and at the front end of the de-locking shaft to drive the de-locking shaft to move backwards, and a boss is arranged on the right side of the de-locking shaft, with a sloped front side surface, and a square notch is arranged on the boss, the height of the notch is not greater than that of the inverted sloped edge of the grooves, and the width of the square hole of the chuck plate is not less than that of the boss of the de-locking shaft. The invention is characterized by simple structure and reliable operation.

Description

The locking device of drawout breaker

Technical field

The present invention relates to a kind of circuit breaker, particularly a kind of locking device of drawout breaker.

Background technology

In drawout breaker, usually to have separation, test, three kinds of states that connect, and can accurately locate when making circuit breaker be in above-mentioned three positions, to avoid misoperation, the drawout breaker of deciding device with lock just appears, utilize locking device to make circuit breaker whenever be in separation, when test and arbitrary position of being connected, can lock it, only just can running circuit breaker after release, as China Patent No. be all disclose in 02264483.0 and 200620125962.0 the patent document have the locking device of function, and being used for reaching lock function owing to all adopted locking plate to cooperate square shaft to make in these two patent documents, obvious this mode structure is very complicated.

Summary of the invention

The objective of the invention is to solve the deficiency of the locking device of existing drawout breaker, and a kind of locking device of simple in structure, reliable drawout breaker is provided.

The objective of the invention is to realize by following technical solution: a kind of locking device of drawout breaker, comprise two bearings that are located on the base plate, be located on the base plate and be positioned at the slide plate in bearing the place ahead, be located on the bearing and the drive lead screw that is connected with slide plate, offer several draw-in grooves of circumferential row example on the base portion of described drive lead screw, between two bearings, have additional a square shaft, square shaft is provided with three grooves, the front end of square shaft is fixedlyed connected with slide plate behind the bearing before passing, and rear support is then passed in the rear end; Slidely connect a clamp between described two bearings, have screw hole and square shaft hole on the clamp, be provided with projection in the screw hole, wear the base portion of drive lead screw in the screw hole, the card ditch of drive lead screw base portion can with protruding scarf, clamp constitutes biasing to the left by a spring, on rear support, be provided with unlocking knob, unlocking knob drives the clamp displacement by this latch release shaft, it is characterized in that: described three grooves are arranged on the right flank of square shaft, oral area at each groove is provided with down hypotenuse, described latch release shaft is a square shaft, is provided with square hole at clamp, and latch release shaft is passed this square hole and stretched and insert in the preceding bearing, the front end that is positioned at latch release shaft on preceding bearing is provided with the compression spring to order about latch release shaft displacement rearward, right edge in latch release shaft is provided with boss, and this boss leading flank is the inclined-plane, is provided with square short slot on boss, the height of this short slot is not more than the height of hypotenuse of groove, and the width of the square hole of described clamp is not less than the width at the boss place of latch release shaft.

Further, the rear and front end of the right side wall in the square shaft hole of described clamp is rounded down, and the rear end of the right side wall of the square hole of described clamp is rounded down.

Beneficial effect: move to right and clamp is stuck in the square short slot of latch release shaft clamp is in and treat released state thereby the present invention utilizes the inclined-plane of latch release shaft to promote clamp, at this moment just can utilize the rotation drive lead screw and make sledge displacement, thereby, slide plate make clamp along the contra bevel in square shaft hole and collude on the right flank that leans against square shaft and driving the square shaft displacement simultaneously, thereby simultaneously owing to clamp under the thrust of contra bevel has certain moving to right that clamp is thrown off from the square short slot of separating locked groove again, so latch release shaft displacement backward under the effect of compression spring, it is the place ahead that clamp is positioned at the inclined-plane of latch release shaft again, thereby prepare during for next release action, therefore the present invention is simple in structure, reliable.

Description of drawings

Fig. 1 is the schematic perspective view of the embodiment of the invention

Fig. 2 is the exploded perspective view of present embodiment

The schematic diagram that Fig. 3 is in the lock state for present embodiment

Fig. 4 is the I place enlarged diagram of Fig. 3

Fig. 5 treats the schematic diagram of released state for present embodiment is in

Fig. 6 is in the schematic diagram of released state for present embodiment

Embodiment

Now in conjunction with the accompanying drawings embodiments of the present invention are further described:

As Fig. 1, Fig. 2, Fig. 3, Fig. 5, shown in Figure 6, the embodiment of the locking device of a kind of drawout breaker of the present invention, comprise two bearings 5 that are located on the

base plate

4,6, be located on the base plate 4 and be positioned at bearing 5, the slide plate 1 in 6 the place aheads, be located in bearing 5, on 6 and the drive lead screw 2 that is connected with slide plate 1, offer several draw-in grooves 21 of circumferential row example on the base portion of described drive lead screw 2, at two bearings 5, have additional a square shaft 3 between 6, the right flank of square shaft 3 is provided with three grooves 31, oral area at each groove 31 is provided with down hypotenuse 32, fixedly connected with slide plate 1 in the front end of square shaft 3 bearing 5 backs before passing, rear support 6 is then passed in the rear end; Described two bearings 5, slidely connect a clamp 7 between 6, have screw hole 71 and square shaft hole 73 on the clamp 7, be provided with projection 72 in the screw hole 71, wear the base portion of drive lead screw 2 in the screw hole 71, the card ditch 21 of drive lead screw 2 base portions can with protruding 72 scarves, clamp 7 constitutes biasing to the left by a spring 9, on rear support 6, be provided with unlocking knob, unlocking knob drives clamp 7 displacements by this latch release shaft 8, described latch release shaft 8 is a square shaft, be provided with square hole 74 at clamp 7, latch release shaft 8 is passed this square hole 74 and is stretched and insert in the preceding bearing 5, the front end that is positioned at latch release shaft 8 on preceding bearing 5 is provided with compression spring 10 to order about latch release shaft 8 displacement rearward, right edge in latch release shaft 8 is provided with boss 81, and this boss leading flank is inclined-plane 811, is provided with square short slot 812 on boss 81, the height b of this short slot 812 is not more than the height b of hypotenuse 32 of groove 31, and the width of the square hole 7 of described clamp 7 is not less than the width c at the boss place of latch release shaft 8.The present invention is by pushing unlocking knob, make latch release shaft 8 displacement forward, utilizing the inclined-plane 811 of latch release shaft 8 to promote clamp 7 moves to right and clamp 7 is stuck in the square short slot 812 of latch release shaft 8, at this moment the projection 72 of clamp 7 is thrown off in the draw-in groove 21 of drive lead screw 2, circuit breaker is in treats released state, at this moment just can utilize handle rotation drive lead screw 2 and make slide plate 1 displacement, thereby clamp 7 is colluded on the right flank that leans against square shaft 3 along contra bevel 32 displacements in square shaft hole 31 thereby slide plate 1 displacement then drives square shaft 3 displacements simultaneously, thereby simultaneously owing to clamp 7 under the oblique thrust of contra bevel 32 has certain moving to right that clamp 7 is thrown off from the square short slot 812 of separating locked groove 8 again, so latch release shaft 8 displacement backward under the effect of compression spring 10, it is the place ahead that clamp 7 is positioned at the inclined-plane 811 of latch release shaft 8 again, thereby prepare during for next release action, at this moment circuit breaker is in the unlocked position.Need to prove that indication is forward and backward in the present embodiment, reach orientation such as rear side, with reference under the different situations, can be different orientation titles, therefore should not be considered as limitation of the present invention.

As shown in Figure 4, the rear and front end of the right side wall in the square shaft hole 73 of described clamp 7 is rounded down 75, and the rear end of the right side wall of the square hole 74 of described clamp 7 is rounded down 75.Fillet 75 helps and thereby cooperating of hypotenuse 32, inclined-plane 811 conveniently promotes clamp 7 displacements by being set as.

In the diagram because its thinner thickness of bearing before considering generally, the stationarity when moving to improve square shaft in order to increase its thickness, present embodiment also on fore-stock 5 fixing installing one thicken plate 11, compress spring 10 like this and also be installed in this and thicken on the plate.

Claims

1. the locking device of a drawout breaker, comprise two bearings that are located on the base plate, be located on the base plate and be positioned at the slide plate in bearing the place ahead, be located on the bearing and the drive lead screw that is connected with slide plate, offer several draw-in grooves of circumferential array on the base portion of described drive lead screw, have additional a square shaft between two bearings, square shaft is provided with three grooves, the front end of square shaft is fixedlyed connected with slide plate behind the bearing before passing, and rear support is then passed in the rear end; Slidely connect a clamp between described two bearings, have screw hole and square shaft hole on the clamp, be provided with projection in the screw hole, wear the base portion of drive lead screw in the screw hole, the draw-in groove of drive lead screw base portion can with protruding scarf, clamp constitutes biasing to the left by a spring, on rear support, be provided with unlocking knob, unlocking knob drives the clamp displacement by latch release shaft, it is characterized in that: described three grooves are arranged on the right flank of square shaft, oral area at each groove is provided with down hypotenuse, described latch release shaft is a square shaft, is provided with square hole at clamp, and latch release shaft is passed this square hole and stretched and insert in the preceding bearing, the front end that is positioned at latch release shaft on preceding bearing is provided with the compression spring to order about latch release shaft displacement rearward, right edge in latch release shaft is provided with boss, and this boss leading flank is the inclined-plane, is provided with square short slot on boss, the height of this short slot is not more than the height of hypotenuse of groove, and the width of the square hole of described clamp is not less than the width at the boss place of latch release shaft.

2. the locking device of drawout breaker according to claim 1, it is characterized in that: the rear and front end of the right side wall in the square shaft hole of described clamp is rounded down, and the rear end of the right side wall of the square hole of described clamp is rounded down.