CN212322933U

CN212322933U - Operating mechanism of miniature circuit breaker

Info

Publication number: CN212322933U
Application number: CN202020784290.4U
Authority: CN
Inventors: 付正刚; 邵登峰; 金旭
Original assignee: Zhenlan Electric Shanghai Co ltd
Current assignee: Zhenlan Electric Shanghai Co ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2021-01-08
Anticipated expiration: 2030-05-13

Abstract

The utility model belongs to the technical field of the circuit breaker technique and specifically relates to a miniature circuit breaker operating device. A miniature circuit breaker operating mechanism characterized in that: the upper part of the inside of the shell is connected with a handle by adopting a first pin shaft, one end of the handle is positioned at the outer side position above the shell, the other end of the handle is connected with one end of the movable contact by adopting a hinging mode, and one side of the lower part of the movable contact is connected with one end of the main tension spring by adopting a second pin shaft; the other end of the main tension spring is connected with the jump buckle; the jump buckle is located the rear side position on moving contact upper portion, and the upper end of hasp adopts the torsional spring to be connected with the instruction handle, and the lower extreme of hasp adopts the hasp torsional spring to be connected with the one end of support, and the other end and the current release of support are connected. Compared with the prior art, the problems of poor mechanism stability and increased production and installation costs of the small circuit breaker operating mechanism caused by complex structure are solved; the problem of single wiring mode of the existing miniature circuit breaker is solved; the problem that the state indicating function of the circuit breaker is prone to failure is solved.

Description

Operating mechanism of miniature circuit breaker

Technical Field

The utility model belongs to the technical field of the circuit breaker technique and specifically relates to a miniature circuit breaker operating device.

Background

Miniature circuit breaker is the protection electrical apparatus of installing at terminal distribution lines, and the overload and the short-circuit protection of mainly used circuit and equipment require the circuit breaker to guarantee that moving contact and static contact can reliably be closed under operating condition, and the circuit breaker can break brake simultaneously fast under fault condition, and operating device's performance will be direct miniature circuit breaker's function. The existing small circuit breaker operating mechanism has more parts, complex structure and relatively high production and installation cost; meanwhile, due to the complex matching relationship of parts, the slide fastener is easy to slip after frequent operation, and the stability is poor.

The existing miniature circuit breaker generally adopts cage type wiring, the wiring mode is single, and various wiring requirements of users cannot be met.

The circuit breaker operating condition is generally instructed through pasting the data plate outward to current miniature circuit breaker, and external data plate easily appears damaging the phenomenon, is unfavorable for the user to the discernment of circuit breaker state.

Disclosure of Invention

The utility model provides a small-sized circuit breaker operating mechanism for overcoming the defects of the prior art, which solves the problems of poor mechanism stability and increased production and installation costs caused by complex structure of the small-sized circuit breaker operating mechanism; the problem of single wiring mode of the existing miniature circuit breaker is solved; the problem that the state indicating function of the circuit breaker is prone to failure is solved.

For realizing above-mentioned purpose, design a miniature circuit breaker operating device, including shell, current release, moving contact, static contact, jump and detain, main extension spring, hasp torsional spring, support, its characterized in that: the upper part of the inside of the shell is connected with a handle by adopting a first pin shaft, one end of the handle is positioned at the outer side position above the shell, the other end of the handle is connected with one end of the movable contact by adopting a hinging mode, and one side of the lower part of the movable contact is connected with one end of the main tension spring by adopting a second pin shaft; the other end of the main tension spring is connected with the jump buckle; the trip buckle is positioned at the rear side of the upper part of the movable contact, one end of the trip buckle is connected with the shell by adopting a third pin shaft, the other end of the trip buckle is connected with the lock catch, and the middle part of the trip buckle is connected with the other end of the main tension spring; the upper end of the lock catch is connected with the indicating handle through a torsional spring, the lower end of the lock catch is connected with one end of the support through a lock catch torsional spring, and the other end of the support is connected with the current release.

And the second pin shaft is positioned in the clamping groove at one side of the lower part of the moving contact.

The other end of the jump buckle is connected with the lap joint groove of the lock catch.

The middle part of the jump buckle is provided with a jump buckle slot hole, and the jump buckle is connected with the other end of the main tension spring through the jump buckle slot hole.

The indication handle is connected with the shell through the boss and is connected with one end of the torsion spring, and the other end of the torsion spring is connected with the lock catch.

The lock catch torsional spring is connected with the shell through a fourth pin shaft, one end of the lock catch torsional spring is connected with the lower end of the lock catch, and the other end of the lock catch torsional spring is connected with the support.

The left cage terminal and the right cage terminal are respectively arranged on the left side and the right side in the shell, and the left cage terminal is connected with the static contact by adopting a screw; the right cage terminal is connected with the connecting plate by adopting another screw.

The static contact be L type structure to be located the left side of static contact and be rectangle frame construction, be located the left rectangle frame construction of static contact and be equipped with left cage terminal, left cage terminal adopts the screw to be connected with the top of static contact.

The connecting plate is of a U-shaped structure, the right cage-type terminal is embedded in the U-shaped groove of the connecting plate, and the right cage-type terminal is connected with the top end of the connecting plate by another screw.

Compared with the prior art, the utility model, provide a miniature circuit breaker operating device, solved the mechanism poor stability that miniature circuit breaker operating device caused because of the structure is complicated to and the problem that the production installation cost increases; the problem of single wiring mode of the existing miniature circuit breaker is solved; the problem that the state indicating function of the circuit breaker is prone to failure is solved.

Drawings

Fig. 1 is a schematic diagram of the opening state of the present invention.

Fig. 2 is the schematic diagram of the closing state of the utility model.

Fig. 3 to 5 are schematic views of the connection structure of the housing, the stationary contact, the screw, the connecting plate and the cage terminal.

Fig. 6 is a partial sectional view of the present invention.

Fig. 7 and 8 are schematic views of a connection structure of a handle and a movable contact.

Referring to fig. 1 to 8, 10 is a handle, 11 is a first pin, 12 is a trip, 121 is a trip slot, 13 is a main tension spring, 14 is a third pin, 15 is a movable contact, 16 is a screw, 17 is a fixed contact, 18 is a left cage terminal, 19 is a housing, 20 is a second pin, 21 is a latch torsion spring, 22 is a fourth pin, 23 is a bracket, 24 is a latch, 25 is a current release, 26 is a torsion spring, 27 is an indicating handle, 28 is a connecting plate, 29 is a right cage terminal, and 30 is another screw.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 to 8, the upper portion of the inside of the outer casing 19 is connected to the handle 10 by using a first pin 11, one end of the handle 10 is located at the outer side position above the outer casing 19, the other end of the handle 10 is connected to one end of the movable contact 15 by a hinge joint, and one side of the lower portion of the movable contact 15 is connected to one end of the main tension spring 13 by using a second pin 20; the other end of the main tension spring 13 is connected with a jump buckle 12; the trip 12 is positioned at the rear side of the upper part of the movable contact 15, one end of the trip 12 is connected with the shell 19 by a third pin 14, the other end of the trip 12 is connected with the lock catch 24, and the middle part of the trip 12 is connected with the other end of the main tension spring 13; the upper end of the lock catch 24 is connected with the indicating handle 27 by adopting a torsion spring 26, the lower end of the lock catch 24 is connected with one end of the bracket 23 by adopting a lock catch torsion spring 21, and the other end of the bracket 23 is connected with the current release 25.

The second pin 20 is located in the slot on one side of the lower portion of the movable contact 15.

The other end of the jump buckle 12 is connected with the overlapping groove of the lock buckle 24.

The middle part of the jump buckle 12 is provided with a jump buckle slot hole 121, and the jump buckle 12 is connected with the other end of the main tension spring 13 through the jump buckle slot hole 121.

The indication handle 27 is connected with the housing 19 through a boss, the indication handle 27 is connected with one end of the torsion spring 26, and the other end of the torsion spring 26 is connected with the latch 24.

The locking torsion spring 21 is connected with the housing 19 by a fourth pin 22, and one end of the locking torsion spring 21 is connected with the lower end of the locking buckle 24, and the other end of the locking torsion spring 21 is connected with the bracket 23.

A left cage terminal 18 and a right cage terminal 29 are respectively arranged at the left side and the right side in the shell 19, and the left cage terminal 18 is connected with a static contact 17 by a screw 16; the right caged terminal 29 is attached to the coupling plate 28 using another screw 30.

The static contact 17 is in an L-shaped structure, the left side of the static contact 17 is in a rectangular frame structure, a left cage terminal 18 is arranged in the rectangular frame structure on the left side of the static contact 17, and the left cage terminal 18 is connected with the top end of the static contact 17 through a screw 16.

The connecting plate 28 is of a U-shaped structure, the right cage terminal 29 is embedded in the U-shaped groove of the connecting plate 28, and the right cage terminal 29 is connected with the top end of the connecting plate 28 by another screw 30.

The operating mechanism of the miniature circuit breaker is characterized in that a handle 10 is rotatably connected with a shell 19 through a first pin shaft 11, and the handle 10 can perform reciprocating swing by taking the first pin shaft 11 as a center under the limit of the shell 19; one end of the movable contact 15 is connected with the handle 10, the other end of the movable contact is connected with the main tension spring 13 through a second pin shaft 20, and the movable contact 15 and the handle 10 form stable rotary connection under the action force of the main tension spring 13; the second pin shaft 20 is arranged in a clamping groove of the movable contact 15 and is used as a hanging pin for installing the main tension spring 13; one end of the jump buckle 12 is rotatably connected with the shell 19 through a third pin shaft 14, the other end of the jump buckle is lapped with the lapping groove of the lock catch 24, and the middle part of the jump buckle is connected with the main tension spring 13; under the condition of non-fault tripping, the jump buckle 12 is stably lapped with the lock catch 24 under the action of the main tension spring 13; one end of the main tension spring 13 is connected with the jump buckle 12, and the other end is connected with the second pin shaft 20; the lower end of the lock catch 24 is rotatably connected with the bracket 23, meanwhile, the lower end of the lock catch 24 is connected with the lock catch torsion spring 21, and the lock catch 24 can perform small-amplitude reciprocating swing at the rotary connection position; the latch torsion spring 21 is installed on the fourth pin shaft 22, one end of the latch torsion spring 21 is connected with the bracket 23, and the other end is connected with the latch 24 to provide restoring force for the latch 24; one end of the bracket 23 is rotatably connected with the lower end of the lock catch 24, and the other end is used for installing a current release 25; the bracket 23 and the shell 19 are matched with each other through the clamping groove and the pin hole to form fixed connection.

As shown in fig. 1, in the open state of the circuit breaker, the trip catch 12 and the latch 24 form a stable lap joint under the action of the main tension spring 13 and the latch torsion spring 21; the handle 10 is driven to rotate, the movable contact 15 rotates to the closing position under the action of the operating force of the handle 10 and the acting force of the main tension spring 13, as shown in fig. 2, and the main tension spring 13 provides contact pressure for the movable contact 15. When the breaker is overloaded and has a breaking fault, under the action of an oil cup and a coil, a current release 25 attracts a lock catch 24 to rotate towards a wire outlet end, at the moment, a jump buckle 12 is separated from the lock catch 24, the jump buckle 12 rotates under the action of a main tension spring 13, the direction of the action of the main tension spring 13 is changed, and a moving contact 15 is pulled to complete tripping; the moving contact 15 is opened to drive the tripping buckle 12 to reset, meanwhile, the circuit breaker current release 15 loses power, the lock catch 24 resets under the acting force of the lock catch torsion spring 21, and the tripping buckle 12 and the lock catch 24 recover to be stably lapped again.

The static contact 17 of the wiring end is arranged to be L-shaped, and the connecting plate 28 of the wiring end is arranged to be U-shaped; the left cage terminal 18 is installed in the groove of the static contact 17, and the screw 16 is used for connecting the static contact 17 and the left cage terminal 18; a right caged terminal 29 is mounted in the U-shaped recess of the coupling plate 28 and a further screw 30 is used to connect the coupling plate 28 and the right caged terminal 29; the housing 19 is used for mounting the fixed contact 17, the connecting plate 28, the left cage terminal 18 and the right cage terminal 29, and round holes are arranged above the wiring terminals, so that the screw 16 and the other screw 30 can be conveniently taken out and can be used for inserting and screwing a screwdriver. When the external connection is carried out, the external connection device can be directly arranged above the static contact 17 and the connecting plate 28, and the connection is pressed through the screw 16 and another screw 30; the external connector can also be installed in the left cage terminal 18 and the right cage terminal 29, and the left cage terminal 18 and the right cage terminal 29 are adjusted by the screw 16 and another screw 30 to compress the connection.

The indicating handle 27 is rotationally connected with the shell 19 through a lug boss, and the indicating handle 27 can only swing within a specified stroke under the limiting action of the shell 19; torsion spring 26 has one end connected to housing 19 and the other end connected to lever 27 to provide a restoring force to lever 27. When the switch is switched on, the boss on the handle 10 pushes the indicating handle 27 to rotate, and the switch-on state is displayed; when the brake is switched off, the indicating handle 27 loses the function of the handle 10, and is reset under the action of the torsion spring 26 to display the brake switching-off.

Claims

1. The utility model provides a miniature circuit breaker operating device, includes shell, current release, moving contact, static contact, jump and detain, main extension spring, hasp torsional spring, support, its characterized in that: the upper part in the shell (19) is connected with the handle (10) by adopting a first pin shaft (11), one end of the handle (10) is positioned at the outer side position above the shell (19), the other end of the handle (10) is connected with one end of the movable contact (15) in a hinged mode, and one side of the lower part of the movable contact (15) is connected with one end of the main tension spring (13) by adopting a second pin shaft (20); the other end of the main tension spring (13) is connected with a jump buckle (12); the trip buckle (12) is positioned at the rear side of the upper part of the movable contact (15), one end of the trip buckle (12) is connected with the shell (19) by a third pin shaft (14), the other end of the trip buckle (12) is connected with the lock catch (24), and the middle part of the trip buckle (12) is connected with the other end of the main tension spring (13); the upper end of the lock catch (24) is connected with the indicating handle (27) through a torsion spring (26), the lower end of the lock catch (24) is connected with one end of the support (23) through a lock catch torsion spring (21), and the other end of the support (23) is connected with the current release (25).

2. A miniature circuit breaker operating mechanism as set forth in claim 1, wherein: and the second pin shaft (20) is positioned in the clamping groove at one side of the lower part of the movable contact (15).

3. A miniature circuit breaker operating mechanism as set forth in claim 1, wherein: the other end of the jump buckle (12) is connected with the lap joint groove of the lock catch (24).

4. A miniature circuit breaker operating mechanism as set forth in claim 1, wherein: the middle part of the jump buckle (12) is provided with a jump buckle slot hole (121), and the jump buckle (12) is connected with the other end of the main tension spring (13) through the jump buckle slot hole (121).

5. A miniature circuit breaker operating mechanism as set forth in claim 1, wherein: the indication handle (27) is connected with the shell (19) through a boss, the indication handle (27) is connected with one end of the torsion spring (26), and the other end of the torsion spring (26) is connected with the lock catch (24).

6. A miniature circuit breaker operating mechanism as set forth in claim 1, wherein: the lock catch torsion spring (21) is connected with the shell (19) through a fourth pin shaft (22), one end of the lock catch torsion spring (21) is connected with the lower end of the lock catch (24), and the other end of the lock catch torsion spring (21) is connected with the support (23).

7. A miniature circuit breaker operating mechanism as set forth in claim 1, wherein: a left cage terminal (18) and a right cage terminal (29) are respectively arranged on the left side and the right side in the shell (19), and the left cage terminal (18) is connected with a static contact (17) by a screw (16); the right cage terminal (29) is connected with the connecting plate (28) by another screw (30).

8. A miniature circuit breaker operating mechanism as set forth in claim 7, wherein: the static contact (17) is of an L-shaped structure, the left side of the static contact (17) is of a rectangular frame structure, a left cage-type terminal (18) is arranged in the rectangular frame structure on the left side of the static contact (17), and the left cage-type terminal (18) is connected with the top end of the static contact (17) through a screw (16).

9. A miniature circuit breaker operating mechanism as set forth in claim 7, wherein: the connecting plate (28) is of a U-shaped structure, the right cage-type terminal (29) is embedded in a U-shaped groove of the connecting plate (28), and the right cage-type terminal (29) is connected with the top end of the connecting plate (28) by another screw (30).