CN211404428U - Small-sized circuit breaker operating mechanism - Google Patents

Abstract

The utility model discloses a miniature circuit breaker operating device, it includes handle, U type bolt, contact support, commentaries on classics board, hasp and moving contact. The shell is coaxially hinged with the contact support, the contact support is hinged with the rotating plate, and the rotating plate is hinged with the lock catch; the rotating plate is provided with a limiting boss and a sliding groove, the lock catch is provided with a first fork, and the limiting boss and the first fork are oppositely clamped; a clamping notch is formed in one side, facing the limiting boss, of the first branch, and the clamping notch and the limiting surface of the limiting boss form a U-shaped surrounding movable opening together; one end of the U-shaped bolt is hinged in the handle, and the other end of the U-shaped bolt is inserted in the U-shaped surrounding movable opening; the central line of the sliding groove is in a fold line shape facing the limiting boss, and a sliding space is provided for the other end of the U-shaped bolt to slide in and out of the U-shaped surrounding movable opening. The utility model discloses can reduce cost to improve the reliability of product.

Description

Small-sized circuit breaker operating mechanism

Technical Field

The utility model relates to a miniature circuit breaker field, concretely relates to miniature circuit breaker operating device.

Background

The miniature circuit breaker is widely used in industrial, commercial, high-rise and civil residence, mainly used for overload and short circuit protection of lighting, distribution lines and equipment in office buildings, households and the like, and also used for infrequent on-off and switching of lines.

The miniature circuit breaker generally comprises an electromagnetic tripping system, a thermal tripping system, an arc extinguishing system, an operating mechanism and the like. The operating mechanism is used for realizing switching-off and switching-off, and the quality of the operating mechanism directly influences the performance of the circuit breaker. In particular, it is intended on the one hand to achieve a reliable closing of the circuit breaker and on the other hand to ensure a rapid opening of the circuit breaker in the fault state.

The operating mechanism of the circuit breaker with the rotating plate basically comprises parts such as a lock catch, a jump buckle, the rotating plate, a contact support, a U-shaped bolt, a handle and the like, and the circuit breaker has the defects that the number of the parts of the mechanism is large, the production process cost (such as assembly) is increased, the breaking time of the circuit breaker is influenced, and the reliability of the mechanism is reduced to a certain extent.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a miniature circuit breaker operating device of simple structure, cost reduction and reliability promotion.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the miniature circuit breaker operating mechanism is arranged in the shell and comprises a handle, a U-shaped bolt, a contact support, a rotating plate, a lock catch and a moving contact; the shell is coaxially hinged with the contact support, the contact support is hinged with the rotating plate, and the rotating plate is hinged with the lock catch; the rotating plate is provided with a limiting boss and a sliding groove, the lock catch is provided with a first fork, and the limiting boss and the first fork are oppositely clamped; a clamping notch is formed in one side, facing the limiting boss, of the first branch, and the clamping notch and the limiting surface of the limiting boss form a U-shaped surrounding movable opening together; one end of the U-shaped bolt is hinged in the handle, and the other end of the U-shaped bolt is inserted in the U-shaped surrounding movable opening; the central line of the sliding groove is in a zigzag shape facing the limiting boss, and a sliding space is provided for the other end of the U-shaped bolt to slide into and out of the U-shaped surrounding movable opening.

Furthermore, the clamping notch is composed of three planes which are connected in sequence.

Furthermore, the rotating plate applies pressure which deflects towards the opening direction through a rotating plate return spring; the contact supports the pressure which is applied by a pressure spring of the moving contact to enable the lower side of the contact to deflect towards the direction of the contact; the lock catch applies pressure for enabling the first fork of the lock catch to swing towards the closing direction through the lock catch return spring.

Furthermore, a first limit clamp is arranged at the rear side of the rotating plate, and a second limit clamp and a ring groove concentric with the shaft hole of the second limit clamp are arranged at the rear side of the contact support; the moving contact pressure spring is a torsion spring and is arranged in the annular groove, one end of the moving contact pressure spring is clamped in the first limiting clamp, and the other end of the moving contact pressure spring is clamped in the second limiting clamp.

Furthermore, a clamping groove is formed in the rear side of the contact support, and the moving contact is clamped in the clamping groove.

Furthermore, the rotating plate return spring is a pressure spring, a spring groove is formed in the rear side of the rotating plate, one end of the rotating plate return spring is clamped in the spring groove, and the other end of the rotating plate return spring abuts against the inner wall of the shell.

Furthermore, a front protruding cylinder is arranged on the front side of the lock catch, a concentric arc groove is arranged beside the front protruding cylinder, and a third limiting clamp is formed at one end of the arc groove; the front side of the contact support is provided with a fourth limit card; the lock catch return spring is a torsion spring and is sleeved on the front protruding cylinder, one end of the lock catch return spring is clamped in the third limiting clamp, and the other end of the lock catch return spring is clamped in the fourth limiting clamp.

The lock catch is provided with a second fork, one end of the bimetal tripping rod is hinged to the second fork, and the other end of the bimetal tripping rod is connected with the bimetal.

Further, under a closing state, an obtuse angle towards the direction of the arc extinguishing chamber is formed between a plane formed by central lines of two columns of the U-shaped bolt and the limiting surface.

After the technical scheme is adopted, compared with the background art, the utility model, have following advantage:

to the miniature circuit breaker who has the board design of changeing, the utility model discloses an ingenious institutional advancement, it surrounds the running-on in order to tie the cooperation action with U type to have designed the U type, only can replace the operation combination of market contact support + commentaries on classics board + jump knot + hasp + linkage with the operation combination of contact support + commentaries on classics board + hasp, the part quantity has been reduced, the local shape of each part is reasonable simultaneously, assembly process has been reduced on the one hand, the reduction of cost has been brought, on the other hand, the middle transmission link has been reduced, breaking time is shorter, the structural reliability has also obtained the promotion.

Drawings

Fig. 1 is a schematic structural view (opening) of a miniature circuit breaker to which the present invention is applied;

FIG. 2 is a schematic front side view of the present invention;

FIG. 3 is a schematic view of the rear side structure of the present invention;

fig. 4 is an exploded view of the present invention;

fig. 5 is a schematic view of the front side of the contact support of the present invention;

FIG. 6 is a front side view of the rotary plate of the present invention;

fig. 7 is a front schematic view of the lock of the present invention;

fig. 8 is a rear view of the rotary plate of the present invention;

fig. 9 is a rear side view of the contact support of the present invention;

fig. 10 is a rear view of the latch of the present invention;

fig. 11 is a schematic structural diagram (closing) of a miniature circuit breaker to which the present invention is applied.

Description of reference numerals:

the handle 1 and the hinge hole 101;

a handle spring 2; a rotating plate return spring 3; a shaft 4; a moving contact pressure spring 5; a moving contact 6;

the contact comprises a contact support 7, a shaft hole 701, a ring groove 702, a second limit clamp 703, a clamping groove 704 and a fourth limit clamp 705;

the rotary plate 8, a shaft hole 801, a spring groove 802, a first limit card 803, a limit boss 804, a limit face 8041 and a sliding groove 805;

a U-shaped bolt 9,

A lock catch return spring 10,

The lock catch 11, the shaft hole 1101, the front convex cylinder 1102, the arc groove 1103, the third limit clamp 11031, the first fork 1104, the second fork 1105 and the hinge hole 11051;

a bimetallic trip bar 12; a contact 13; an arc chute 14.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or position relationship shown in the drawings, and are only for convenience of description and simplification of the present invention, but do not indicate or imply that the device or element of the present invention must have a specific orientation, and thus, should not be construed as limiting the present invention.

Examples

Referring to fig. 1, 2 and 3, the present invention discloses a miniature circuit breaker operating mechanism, which is installed in a housing and includes a handle 1, a handle spring 2, a rotating plate return spring 3, a shaft 4, a moving contact pressure spring 5, a moving contact 6, a contact support 7, a rotating plate 8, a U-shaped bolt 9, a latch return spring 10, a latch 11 and a bimetallic trip rod 12.

Referring to fig. 1 and 4, the handle 1 is hinged in the housing, and the handle spring 6 applies a pressure to the handle end to swing in the opening direction, so that the handle spring returns in the opening direction when the constraint is lost. The handle 1 is provided with a hinge hole 101.

Referring to fig. 4, 5 and 6, a shaft hole 701 is formed on the contact support 7, a shaft hole 801 is formed on the rotating plate 8, a shaft hole 1101 is formed on the lock catch 11, and the shaft 4 abnormally passes through the shaft hole 701, the shaft hole 801 and the shaft hole 1101, so that coaxial hinge connection between the contact support 7 and the housing, between the rotating plate 8 and the contact support 7, and between the lock catch 11 and the rotating plate 8 is realized.

Referring to fig. 8, the rear side of the rotating plate 8 is provided with a spring slot 802 for mounting the rotating plate return spring 3. The rotating plate return spring 3 is a compression spring, one end of which is clamped in the spring groove 802, and the other end of which is abutted against the inner wall of the shell. In this way, the rotary plate 8 is biased in the opening direction by the rotary plate return spring 3.

Referring to fig. 4, 8 and 9, the rear side of the rotating plate 8 is provided with a first limit clip 803, and the rear side of the contact support 7 is provided with a second limit clip 703 and a ring groove 702 concentric with the shaft hole 701. The movable contact pressure spring 5 is a torsion spring, and is installed in the ring groove 702, one end 501 of which is clamped in the first limit clamp 803, and the other end 502 of which is clamped in the second limit clamp 703. In this way, the contact support 7 is pressed by the movable contact pressure spring 5 to deflect the lower side thereof in the contact direction. The rear side of the contact support 7 is provided with a clamping groove 704, and the movable contact 6 is clamped in the clamping groove 704.

Referring to fig. 4, 5 and 7, the front side of the latch 11 has a front protruding cylinder 1102, a concentric arc groove 1103 is disposed beside the front protruding cylinder 1102, and one end of the arc groove 1103 forms a third position-limiting clamp 11031. The front side of the contact support 7 has a fourth limit catch 705. The latch return spring 10 is a torsion spring, which is sleeved on the front protruding cylinder 1102, and one end of the latch return spring is clamped in the third limiting clamp 11031, and the other end of the latch return spring is clamped in the fourth limiting clamp 705. In this way, the latch 11 can apply a pressure to bias the first branch 1104 in the closing direction by the latch return spring 10.

In this way, the rotating plate 8 and the first branch 1104 of the latch 11 are clamped in opposite directions by the combined action of the rotating plate return spring 3, the moving contact pressure spring 5 and the latch return spring 10.

Referring to fig. 6, a limiting boss 804 and a sliding groove 805 are disposed on the front side of the rotating plate 8. The side of the first branch facing the limit boss 804 is provided with a clamping notch, and the clamping notch is composed of three mutually connected planes 11041, 11042 and 11043. The clamping notch and the limiting surface 8041 of the limiting boss 804 together form a U-shaped surrounding movable opening. One end 901 of the U-shaped bolt 9 is hinged in the hinge hole 101 of the handle 1, and the other end is inserted in the U-shaped surrounding movable opening. The central line of the sliding groove 805 is in a zigzag shape facing the limiting boss 804, and a sliding space is provided for the other end 902 of the U-shaped bolt 9 to slide in and out of the U-shaped surrounding movable opening.

The lock catch 11 further comprises a second branch 1105, a hinge hole 11051 is formed in the second branch 1105, one end of the bimetallic trip rod 12 is hinged to the second branch 1105, and the other end is connected with the bimetallic trip rod.

The working principle is as follows:

when the switch is switched on, the 902 column of the U-shaped bolt 9 is limited by the U-shaped surrounding movable opening and acts on the limiting surface 8041 of the rotating plate 8, so that the rotating plate 8 deflects towards the switch-on direction, the movable contact 6 is contacted with the contact, and at the moment, due to the limiting effect of the U-shaped surrounding movable opening, the whole operating mechanism keeps a clamping state, namely the handle spring 2 and the rotating plate return spring 3 store energy. Referring to fig. 11, in this state, an obtuse angle α facing the arc-extinguishing chamber is formed between a plane formed by the center lines of the two columns of the U-shaped bolt 9 and the limit surface 8041.

When a product is abnormally tripped (namely, the electromagnetic tripping system acts or the bimetal deforms), the lock catch 11 is subjected to the action of the electromagnetic tripping system or the bimetal tripping rod and swings towards the opening direction, at the moment, the opposite clamping state of the U-shaped surrounding opening is damaged, the U-shaped bolt 9 slides into the sliding groove 805, the handle 1 rotates in the opening direction of the groove under the action of the handle spring 2, and in the rotating process, the U-shaped bolt 9 is driven by the handle spring to enable the 902 column of the U-shaped bolt 9 to return to the U-shaped surrounding opening, so that the opening is completed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. Miniature circuit breaker operating device installs in the casing, and it includes handle, U type bolt, contact support, commentaries on classics board, hasp and moving contact, its characterized in that: the shell is coaxially hinged with the contact support, the contact support is hinged with the rotating plate, and the rotating plate is hinged with the lock catch; the rotating plate is provided with a limiting boss and a sliding groove, the lock catch is provided with a first fork, and the limiting boss and the first fork are oppositely clamped; a clamping notch is formed in one side, facing the limiting boss, of the first branch, and the clamping notch and the limiting surface of the limiting boss form a U-shaped surrounding movable opening together; one end of the U-shaped bolt is hinged in the handle, and the other end of the U-shaped bolt is inserted in the U-shaped surrounding movable opening; the central line of the sliding groove is in a zigzag shape facing the limiting boss, and a sliding space is provided for the other end of the U-shaped bolt to slide into and out of the U-shaped surrounding movable opening.

2. The miniature circuit breaker operating mechanism of claim 1, wherein: the clamping notch is formed by three planes which are sequentially connected.

3. The miniature circuit breaker operating mechanism of claim 1, wherein: the rotating plate applies pressure which deflects towards the opening direction through a rotating plate return spring; the contact supports the pressure which is applied by a pressure spring of the moving contact to enable the lower side of the contact to deflect towards the direction of the contact; the lock catch applies pressure for enabling the first fork of the lock catch to swing towards the closing direction through the lock catch return spring.

4. A miniature circuit breaker operating mechanism as set forth in claim 3, wherein: the rear side of the rotating plate is provided with a first limiting clamp, and the rear side of the contact support is provided with a second limiting clamp and a ring groove concentric with the shaft hole of the second limiting clamp; the moving contact pressure spring is a torsion spring and is arranged in the annular groove, one end of the moving contact pressure spring is clamped in the first limiting clamp, and the other end of the moving contact pressure spring is clamped in the second limiting clamp.

5. The miniature circuit breaker operating mechanism of claim 4, wherein: the rear side of the contact support is provided with a clamping groove, and the moving contact is clamped in the clamping groove.

6. A miniature circuit breaker operating mechanism as set forth in claim 3, wherein: the rotary plate return spring is a pressure spring, a spring groove is formed in the rear side of the rotary plate, one end of the rotary plate return spring is clamped in the spring groove, and the other end of the rotary plate return spring abuts against the inner wall of the shell.

7. A miniature circuit breaker operating mechanism as set forth in claim 3, wherein: a front convex cylinder is arranged on the front side of the lock catch, a concentric arc groove is arranged beside the front convex cylinder, and a third limiting clamp is formed at one end of the arc groove; the front side of the contact support is provided with a fourth limit card; the lock catch return spring is a torsion spring and is sleeved on the front protruding cylinder, one end of the lock catch return spring is clamped in the third limiting clamp, and the other end of the lock catch return spring is clamped in the fourth limiting clamp.

8. The miniature circuit breaker operating mechanism of claim 1, wherein: the lock catch is provided with a second fork, one end of the bimetal tripping rod is hinged to the second fork, and the other end of the bimetal tripping rod is connected with the bimetal.

9. The miniature circuit breaker operating mechanism of claim 1, wherein: and under a closing state, an obtuse angle towards the direction of the arc extinguishing cover is formed between a plane formed by the central lines of the two columns of the U-shaped bolt and the limiting surface.

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