CN220021024U - On-off mechanism of double-layer rotary double-breakpoint circuit breaker - Google Patents

Abstract

The utility model relates to the field of breaker on-off mechanisms, in particular to a double-layer rotary double-break-point breaker on-off mechanism. The problems of poor safety and poor reliability of the existing rotary double-breakpoint plastic shell type circuit breaker are solved. The electric conduction contact bridge is movably arranged in a space formed by the disc and the disc column, a spring shaft pin is arranged in a pin shaft sliding groove on the disc, and two ends of the spring shaft pin are connected with springs in a hanging mode; the two groups of spring pin shafts are respectively arranged at two ends of the conductive contact bridge. The double-layer fixed disc structure is adopted, and the double-layer synchronous spring and spring shaft pin matching mode is adopted, so that the conductivity and the reliability of the circuit breaker are guaranteed, meanwhile, the anti-falling shoulder is added on the conductive contact bridge, and the hidden danger of arc reburning caused by falling of the conductive contact bridge is effectively avoided.

Description

On-off mechanism of double-layer rotary double-breakpoint circuit breaker

Technical Field

The utility model relates to the field of breaker on-off mechanisms, in particular to a double-layer rotary double-break-point breaker on-off mechanism.

Background

In the field of the low-voltage electrical appliances, the rotary double-breakpoint molded case circuit breaker has the advantages of convenient installation, excellent arc extinguishing capability, compact internal structure, smaller volume, space saving for the switchgear energy equipment, copper, silver and other noble metals saving, and is widely applied to the field of medium-high quality circuit breakers.

The rotary double-breakpoint plastic shell type circuit breaker becomes a main striking product type of the low-voltage circuit breaker due to the characteristics of simple structure, small volume, strong arc extinguishing capability and the like, and the on-off mechanism is a core mechanism for ensuring the working performance, however, the temporary locking function of the current similar products mainly depends on a shoulder-groove-bayonet lock structure, abrasion and unbalanced stress of a spring can occur after repeated reciprocation, and temporary locking failure can be caused.

Disclosure of Invention

The utility model provides an on-off mechanism of a double-layer rotary double-breakpoint circuit breaker, which effectively solves the problems of poor safety and poor reliability of the traditional rotary double-breakpoint plastic shell type circuit breaker.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the on-off mechanism of the double-layer rotary double-breakpoint circuit breaker comprises a fixed disc 1 and a conductive contact bridge 3 which is arranged in the fixed disc 1 through a fixed shaft 2, wherein the fixed disc 1 consists of a disc 101 and a disc column 102, the conductive contact bridge 3 is movably arranged in a space formed by the disc 101 and the disc column 102, a spring shaft pin 5 is arranged in a pin shaft chute 104 on the disc 101, and two ends of the spring shaft pin 5 are connected with springs 4 in a hanging manner; two groups of spring pin shafts 5 are respectively arranged at two ends of the conductive contact bridge 3.

Two symmetrical spring clamping grooves 103, two pin shaft sliding grooves 104 and a group of shaft holes 105 are arranged on the disc 101, and the shaft holes 105 are used for installing the fixed shaft 2.

The springs 4 are two-section parallel springs, which are connected through a connecting wire 401, and the connecting wire 401 is placed in a spring clamping groove 103 on the disc 101.

The pin shaft chute 104 adopts an L-shaped structure.

The conductive contact bridge 3 is provided with a falling-preventing shoulder 302.

Two groups of springs 4 hung on the two groups of spring pin shafts 5 are arranged on the disc 101.

The beneficial effects of the utility model are as follows: 1) The anti-falling shoulder is additionally arranged on the structure of the traditional conductive contact bridge, so that the anti-falling buckle of the traditional conductive bridge is eliminated, the structure is simpler, and the hidden danger of arc reburning caused by falling of the conductive contact bridge is successfully avoided.

(2) The double-layer fixed disc structure is adopted, the double-layer synchronous spring and spring shaft pin matching mode is adopted, and the conductive contact bridge can automatically balance the pressure of two movable contacts due to the action of spring moment, so that the conductivity and the reliability of the circuit breaker are ensured.

Drawings

FIG. 1 is a block diagram of the present utility model;

FIG. 2 is a schematic view of a stator plate structure;

FIG. 3 is a schematic diagram of a conductive contact bridge structure;

FIG. 4 is a spring and spring pin mounting schematic;

FIG. 5 is a schematic diagram of a first use state;

FIG. 6 is a second schematic view of the usage state;

FIG. 7 is a third schematic view of the use state;

the figure shows: the fixed disc 1, the disc 101, the disc column 102, the spring clamping groove 103, the pin shaft sliding groove 104, the shaft hole 105, the mounting hole 106, the fixed shaft 2, the conductive contact bridge 3, the movable contact 301, the anti-falling shoulder 302, the spring 4, the connecting wire 401 and the spring pin shaft 5.

Detailed Description

The technical scheme of the utility model is further described below by specific embodiments with reference to the accompanying drawings:

example 1

The on-off mechanism of the double-layer rotary double-break-point circuit breaker shown in fig. 1 comprises a fixed disc 1, a fixed shaft 2, a conductive contact bridge 3, a spring 4 and a spring pin 5, and the specific structure is as follows.

The structure of the fixed disk 1 is schematically shown in fig. 1, and is composed of two symmetrical disk pieces 101 and two symmetrical disk columns 102, wherein the space between the two disk pieces 101 and the space outside the two disk pieces 101 are the installation areas of each structure. A mounting hole 106 is provided in the tray column 102 for mounting the entire on-off mechanism. Two sets of spring clamping grooves 103, two sets of pin shaft sliding grooves 104 and one set of shaft holes 105 are arranged on the disc 101. The spring clamping groove 103 is used for limiting and fixing a connecting wire 401 of the spring 4. The pin runner 104 is used for installing the spring pin 5, and the shaft hole 105 is used for installing the fixed shaft 2.

The fixed shaft 2 is fixed between two groups of discs 101 of the fixed disc 1, and the fixed shaft 2 is used for installing the conductive contact bridge 3, so that the conductive contact bridge 3 rotates around the fixed shaft 2 as a circle center.

As shown in fig. 3, the structure of the conductive contact bridge 3 is shown, two ends of the conductive contact bridge 3 are respectively provided with a movable contact 301, and two side surfaces of the conductive contact bridge 3 are respectively provided with a falling-preventing shoulder 302. The anti-falling shoulder 302 is used for limiting the conductive contact bridge 3 through matching with the spring shaft pin 5, so that the hidden danger of arc re-ignition caused by falling of the conductive contact bridge is avoided.

The structure of the spring 4 is shown in fig. 4, the springs 4 are double-section parallel springs, the springs are connected through connecting wires 401, and the connecting wires 401 are arranged in the spring clamping grooves 103, so that the relative stability of the springs 4 can be ensured. As shown in fig. 4, the same spring shaft pin 5 is hung by adopting a double-section parallel spring, so that the stress of the spring 4 is the same when the spring shaft pin 5 moves, and the stability of the two ends of the moving spring shaft pin 5 is improved.

The specific use states are shown in fig. 5, 6 and 7:

as shown in fig. 5, when the circuit is in a normal working state, the conductive contact bridge 3 is acted by the tensile force of the spring 4, so that the movable contacts 301 at two ends of the conductive contact bridge 3 are in close contact with the static contacts embedded in the static contact plate, and normal conduction of current is ensured.

When fault current occurs in the circuit as shown in fig. 6, a larger electric repulsive force is generated between the moving contact 301 and the fixed contact, and the conductive contact bridge is forced to push the spring pin 5 to rotate clockwise along the pin chute 104 to the maximum stretching position of the spring 4 against the action of the spring force.

As shown in fig. 7, at this time, the spring 4 will generate a pulling force that contracts along its own direction, pull the spring pin 5 to move in the other section of the pin ring groove 104, and continue to drive the conductive contact bridge to rotate in an accelerating manner until the spring pin 5 slides onto the anti-falling shoulder 302 of the conductive contact bridge, and stop through the anti-falling shoulder 302 and realize temporary locking; meanwhile, the tripping device of the external operating mechanism spontaneously completes tripping, so that the complete self-locking of the conductive contact bridge is realized.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (6)

1. The utility model provides a make-and-break mechanism of double-deck rotatory double break point circuit breaker, includes the fixed disk and installs the conductive contact bridge in the fixed disk through the fixed axle, its characterized in that: the fixed disc consists of a disc and a disc column, the conductive contact bridge is movably arranged in a space formed by the disc and the disc column, a spring shaft pin is arranged in a pin shaft chute on the disc, and springs are hung at two ends of the spring shaft pin; the two groups of spring pin shafts are respectively arranged at two ends of the conductive contact bridge.

2. The switching mechanism of a double-layer rotary double-break circuit breaker according to claim 1, wherein: two groups of symmetrical spring clamping grooves, two groups of pin shaft sliding grooves and a group of shaft holes are formed in the disc, and the shaft holes are used for installing the fixing shafts.

3. The switching mechanism of a double-layer rotary double-break circuit breaker according to claim 2, wherein: the springs are double-section parallel springs, are connected through connecting wires, and are arranged in spring clamping grooves on the discs.

4. A double-layer rotary double-break circuit breaker on-off mechanism according to claim 3, characterized in that: the pin shaft sliding groove adopts an L-shaped structure.

5. The switching mechanism of a double-layer rotary double-break circuit breaker according to claim 4, wherein: and a falling-preventing convex shoulder is arranged on the conductive contact bridge.

6. The switching mechanism of a double-layer rotary double-break circuit breaker according to claim 5, wherein: and two groups of springs hung on the two groups of spring pin shafts are arranged on the disc.