CN211907367U

CN211907367U - Large-ampere circuit breaker with small shell

Info

Publication number: CN211907367U
Application number: CN202020883797.5U
Authority: CN
Inventors: 饶德选; 谢昕
Original assignee: Shanglian Holding Group Co ltd
Current assignee: Shanglian Holding Group Co ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2020-11-10
Anticipated expiration: 2030-05-22

Abstract

The utility model discloses a big ampere of circuit breaker of little casing, including the circuit breaker shell, be provided with in the circuit breaker shell and put the thing recess, put thing recess upper end and be provided with the handle, the handle lower extreme is connected with U type connecting rod, and U type connecting rod deviates from the handle end and is provided with the jump knot, and the jump knot lower extreme is provided with the latched device, and the latched device lower extreme is provided with the moving contact, and the moving contact left end is provided with the static contact; the locking mechanism comprises a lock catch and a lock catch locking piece, a pull rod is arranged at the lower end of the lock catch, a bimetallic element is arranged at the left end of the pull rod, a limiting magnetic yoke is riveted on the static contact, an armature is arranged at the upper end of the limiting magnetic yoke, a positioning shaft is arranged between the armature and the limiting magnetic yoke, an instantaneous movable spring is sleeved on the positioning shaft, the counter-acting force of the instantaneous movable spring acts on the armature, and the armature resets through the counter-acting force of the instantaneous movable. Above-mentioned technical scheme, structural design is reasonable, simple structure, help improving production efficiency, breaking performance is good, degree of automation is high, low in manufacturing cost and practicality are good.

Description

Large-ampere circuit breaker with small shell

Technical Field

The utility model relates to a circuit breaker technical field, concretely relates to big ampere of circuit breaker of little casing.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to the application range, the high-voltage and low-voltage boundary lines are relatively vague, and the circuit breakers above 3kV are generally called high-voltage electric appliances.

The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, and automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, and the function of the circuit breaker is equivalent to the combination of a fuse type switch, an over-under-heat relay and the like.

However, the existing circuit breaker has the following defects: structural design is unreasonable, and current 125A current specification can't be realized to current 18 modulus (width 18mm), and 125A on the market all realizes with 27 modulus (width 27mm) switch, and the structure is complicated, and is bulky, and production efficiency is low and breaking performance is poor, leads to manufacturing cost height, and the practicality is poor.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a structural design is reasonable, simple structure, help improving production efficiency, breaking performance is good, degree of automation is high, low in manufacturing cost and the big ampere of circuit breaker of little casing that the practicality is good.

In order to achieve the above purpose, the utility model provides a following technical scheme: a small-shell high-ampere circuit breaker comprises a circuit breaker shell, wherein an object placing groove is formed in the circuit breaker shell, a handle is arranged at the upper end of the object placing groove, the lower end of the handle is connected with a U-shaped connecting rod, a jump buckle is arranged at the end, away from the handle, of the U-shaped connecting rod, a lock catch mechanism is arranged at the lower end of the jump buckle, a moving contact is arranged at the lower end of the lock catch mechanism, and a static contact is arranged at the; latching mechanism includes hasp and hasp retaining member, the hasp lower extreme is provided with the pull rod, the pull rod left end is provided with bimetallic element, the riveting has spacing yoke on the stationary contact, spacing yoke upper end is provided with armature, be provided with the location axle between armature and the spacing yoke, the epaxial cover in location is equipped with instantaneous movable spring, instantaneous movable spring's reaction force acts on armature, and armature resets through instantaneous movable spring's reaction force.

The utility model discloses further set up to: switching-on working conditions are as follows: the handle drives the U-shaped connecting rod to act, and the U-shaped connecting rod drives the moving contact to move towards the direction of the static contact through the tripping buckle and the locking mechanism to complete closing.

The utility model discloses still further set up to: and (3) switching off working conditions: when the current passing through the circuit breaker is continuously overlarge, the bimetallic element is heated to deflect rightwards to pull the pull rod, the pull rod is connected with the lock catch, and the lock catch rotates rightwards and then is tripped with the trip catch, so that the breaking and opening processes are completed.

The utility model discloses still further set up to: the limiting magnetic yoke is characterized in that slots are formed in two sides of the limiting magnetic yoke, limiting cones are arranged on two sides of the static contact, and the limiting cones are clamped into the slots in the two sides of the limiting magnetic yoke.

The utility model discloses still further set up to: when the short-circuit current passes through the static contact, magnetic field force is formed on the limiting magnetic yoke, the attraction armature moves downwards, and the latch is pushed to rotate rightwards in the movement process of the armature, so that the latch and the jump buckle are disengaged.

The utility model discloses still further set up to: the lower end of the locking mechanism is provided with a contact support, and the contact support and the moving contact are connected and fixed through hot riveting.

The utility model has the advantages that: compared with the prior art, the utility model has more reasonable structure,

closing: the handle drives the U-shaped connecting rod, the U-shaped connecting rod drives the contact support through the jump buckle and the locking mechanism, the contact support is connected with the moving contact through hot riveting, and the moving contact gradually moves towards the direction of the fixed contact in the pushing process of the handle and finally passes through a mechanism dead point to complete a switching-on process;

opening a brake: description of overload opening: when the current passing through the breaker is continuously overlarge, the bimetallic element is heated to deflect rightwards to pull the pull rod, the pull rod is connected with the lock catch, the lock catch rotates rightwards to be tripped with the trip catch, so that the mechanism loses a connection point, and the breaking and opening processes are finished;

short circuit and opening: the limiting magnetic yoke is fixedly connected with a fixed contact in a riveting mode, the two sides of the limiting magnetic yoke are grooved, the limiting conical bodies on the two sides of the fixed contact are clamped into the grooves on the two sides of the magnetic yoke in a tight fit mode, the limiting conical bodies are installed in the existing base limiting grooves, guide grooves are formed in the upper end of the limiting magnetic yoke, a stretching boss is arranged on the armature, the armature boss is installed through the limiting magnetic yoke guide grooves, the armature and the limiting magnetic yoke are guaranteed to move reliably and integrally, then penetrate through a positioning shaft to be positioned, the instantaneous moving spring is sleeved on the positioning shaft and acts on the armature through a reaction force, when a short-circuit current passes through the fixed contact, magnetic field force is formed on the limiting magnetic yoke, the attraction armature moves downwards, the latch is pushed to rotate rightwards in the moving process of. After the brake is switched off, the magnetic field force disappears, and the armature iron resets through the reaction force of the instantaneous spring piece;

the utility model has the advantages of reasonable design, simple structure, help improving production efficiency, breaking performance is good, degree of automation is high, low in manufacturing cost and the practicality is good. The technical parameters of 125A are solved, the technical indexes can be met in a small shell (18mm wide), and the space and the cost of the cabinet body (various installation boxes and installation environments matched with the cabinet body) are saved.

The invention is further described with reference to the drawings and the specific embodiments.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic view of a partial structure according to an embodiment of the present invention.

Detailed Description

In the description of the present embodiment, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc. appear, the indicated orientation or positional relationship thereof is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1 and 2, the utility model discloses a small-casing high-ampere circuit breaker, including a circuit breaker shell 1, a storage groove 11 is arranged in the circuit breaker shell 1, a handle 2 is arranged at the upper end of the storage groove 11, the lower end of the handle 2 is connected with a U-shaped connecting rod 3, a jump buckle 4 is arranged at the end of the U-shaped connecting rod 3 away from the handle, a locking mechanism 5 is arranged at the lower end of the jump buckle 4, a moving contact 6 is arranged at the lower end of the locking mechanism 5, and a static contact 7 is arranged at the left end of the moving contact 6; the latching mechanism 5 comprises a latch 51 and a latch locking piece 52, a pull rod 8 is arranged at the lower end of the latch 51, a bimetallic element 9 is arranged at the left end of the pull rod 8, a limiting magnetic yoke 10 is riveted on the static contact 7, an armature 12 is arranged at the upper end of the limiting magnetic yoke 10, a positioning shaft 13 is arranged between the armature 12 and the limiting magnetic yoke 10, an instantaneous moving spring 14 is sleeved on the positioning shaft 13, the reaction force of the instantaneous moving spring 14 acts on the armature 12, and the armature 12 resets through the reaction force of the instantaneous moving spring 14.

Preferably, the switching-on condition is as follows: the handle 2 drives the U-shaped connecting rod 3 to move, and the U-shaped connecting rod 3 drives the moving contact 6 to move towards the direction of the static contact through the jump buckle 4 and the locking mechanism 5 to complete closing.

And (3) switching off working conditions: when the current passing through the circuit breaker is continuously overlarge, the bimetallic element 9 is heated to deflect rightwards to pull the pull rod 8, the pull rod 8 is connected with the lock catch 51, and the lock catch 51 is tripped with the trip buckle 4 after rotating rightwards, so that the breaking and opening processes are completed.

The two sides of the limiting magnet yoke 10 are provided with open grooves, the two sides of the static contact 7 are provided with limiting cones, and the limiting cones are clamped into the open grooves in the two sides of the limiting magnet yoke. Preferably, the notch at the upper end of the notch of the limiting magnetic yoke 10 is provided with an upward inclination angle, so that the attraction is more reliable.

When short-circuit current passes through the static contact 7, magnetic field force is formed on the limiting magnetic yoke 10, the attracting armature 12 moves downwards, and the armature 12 pushes the lock catch 51 to rotate rightwards in the moving process, so that the lock catch 51 and the jump buckle 4 are disengaged.

The lower end of the locking mechanism 5 is provided with a contact support, and the contact support is fixedly connected with the moving contact 6 through hot riveting. Preferably, the contact carrier is arranged integrally with the latching mechanism 5 or is fixed by means of screws.

The lower end of the limiting magnetic yoke 10 is provided with an arc extinguish chamber 15, the lower end of the arc extinguish chamber 15 is provided with an arc striking plate 16, and one end of the arc striking plate 16 extends to a position close to the connecting position of the moving contact 6 and the static contact 7.

In actual application:

the utility model has reasonable structure design, simple structure, good breaking performance, high automation degree, low manufacturing cost and good practicability, is beneficial to improving the production efficiency,

the concrete embodiment is as follows:

1. the lock catch, the jump buckle, the contact support, the lock catch locking piece, the moving contact and the contact spring have simple structures, are convenient for automatic assembly and provide production efficiency;

2. the limiting magnetic yoke is matched with the static contact through the conical clamping grooves on the two sides, so that the device is convenient, simple and reliable;

3. the notch at the upper end of the notch of the limiting magnetic yoke is inclined upwards, so that the attraction is more reliable, the adhesion is good, and the product performance is good;

4. the instantaneous movable spring is sleeved in the positioning shaft to form a reaction force principle;

5. the utility model discloses the circuit breaker realizes the high performance index of 18 mould product maximum specification 125A;

6. the limiting magnetic yoke is provided with the guide groove and is positioned and installed with the armature lug boss into a whole, so that the performance is reliable and the installation is convenient;

7. the arc striking plate and the arc striking chamber are arranged, so that the product performance is good;

the combination of the performances is realized in one product, the breaking performance is high, the automation degree is high, and the cost is low. The technical parameters of 125A are solved, the technical indexes can be met in a small shell (18mm wide), and the space and the cost of the cabinet body (various installation boxes and installation environments matched with the cabinet body) are saved.

The above embodiments are only used for further explanation of the present invention, and it is not understood that the present invention is limited by the protection scope of the present invention, and the technical engineers in the field are right according to the above contents of the present invention.

Claims

1. The utility model provides a big ampere of circuit breaker of little casing, includes circuit breaker shell (1), be provided with in circuit breaker shell (1) and put thing recess (11), it is provided with handle (2) to put thing recess (11) upper end, handle (2) lower extreme is connected with U type connecting rod (3), its characterized in that: a jump buckle (4) is arranged at the end, away from the handle, of the U-shaped connecting rod (3), a locking mechanism (5) is arranged at the lower end of the jump buckle (4), a moving contact (6) is arranged at the lower end of the locking mechanism (5), and a static contact (7) is arranged at the left end of the moving contact (6); latching mechanism (5) are including hasp (51) and hasp retaining member (52), hasp (51) lower extreme is provided with pull rod (8), pull rod (8) left end is provided with bimetallic element (9), it has spacing yoke (10) to rivet on static contact (7), spacing yoke (10) upper end is provided with armature (12), be provided with location axle (13) between armature (12) and spacing yoke (10), the cover is equipped with instantaneous movable spring (14) on location axle (13), the reaction force of instantaneous movable spring (14) acts on armature (12), and armature (12) resets through the reaction force of instantaneous movable spring (14).

2. A small housing high amperage circuit breaker according to claim 1, wherein: switching-on working conditions are as follows: the handle (2) drives the U-shaped connecting rod (3) to act, and the U-shaped connecting rod (3) drives the moving contact (6) to move towards the direction of the static contact through the tripping buckle (4) and the locking mechanism (5) to complete closing.

3. A small housing high amperage circuit breaker according to claim 2, wherein: and (3) switching off working conditions: when the current passing through the circuit breaker is continuously overlarge, the bimetallic element (9) is heated to deflect rightwards to pull the pull rod (8), the pull rod (8) is connected with the lock catch (51), and the lock catch (51) rotates rightwards to be tripped with the trip buckle (4), so that the breaking and opening processes are completed.

4. A small housing high amperage circuit breaker according to claim 3, wherein: the two sides of the limiting magnet yoke (10) are provided with open grooves, the two sides of the static contact (7) are provided with limiting cones, and the limiting cones are clamped into the open grooves in the two sides of the limiting magnet yoke.

5. A small housing high amperage circuit breaker according to claim 4, wherein: when short-circuit current passes through the static contact (7), magnetic field force is formed on the limiting magnetic yoke (10), the attraction armature (12) moves downwards, and the armature (12) pushes the lock catch (51) to rotate rightwards in the moving process, so that the lock catch (51) and the jump catch (4) are released.

6. A small housing high amperage circuit breaker according to claim 5, wherein: the lower end of the locking mechanism (5) is provided with a contact support, and the contact support is fixedly connected with the moving contact (6) through hot riveting.