CN219979484U

CN219979484U - Tripping mechanism

Info

Publication number: CN219979484U
Application number: CN202320827219.3U
Authority: CN
Inventors: 葛世伟; 陈丰飞; 支琴琴; 高翔; 胡浪涛
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-11-07
Anticipated expiration: 2033-04-14

Abstract

The utility model discloses a tripping mechanism, which comprises: the static iron core is made of magnetic conductive materials, two sides of the static iron core are bent to form brackets for fixing the movable iron core, and any bracket extends towards the swing direction of the movable iron core to form a stop block with a limit groove; the movable iron core is rotatably arranged between the two brackets, and the lower side of the movable iron core is arranged in the limit groove; the thermal element is positioned between the movable iron core and the static iron core and is fixedly connected with the static iron core, and an integrated static iron core structure is adopted, so that the old static iron core and the stainless steel bracket are creatively changed into one piece, and the number of parts and the process complexity are reduced; meanwhile, the stability and consistency of instantaneous tripping of the circuit breaker are improved.

Description

Tripping mechanism

Technical Field

The utility model particularly relates to a tripping mechanism, and belongs to the technical field of molded case circuit breakers.

Background

Trip mechanism is the main protection architecture of plastics shell formula circuit breaker in the market at present like instantaneous trip mechanism, and its structure mainly contains: static iron core, movable iron core, counter-force spring, stainless steel support, etc.

Wherein the static iron core: the magnetic field generator is mainly used for generating magnetic force when large current passes through;

moving iron core: the main function is to generate magnetic force on the static iron core, the movable iron core can rotate around the rotation center to attract;

reaction spring: used for resetting the movable iron core;

stainless steel support: the magnetic force generating device has the characteristic of no magnetism generation and is used for supporting and limiting the action of the movable iron core and the counter-force spring.

The prior instantaneous tripping mechanism needs to fixedly connect a stainless steel bracket with a static iron core, then fix a movable iron core and a counter-force spring on the stainless steel bracket, for example, chinese patent CN202678257U discloses an electromagnetic tripping mechanism for a circuit breaker, which specifically discloses a bracket, an armature (corresponding to the movable iron core) and a magnetic yoke (corresponding to the static iron core), wherein the armature can swing relative to the bracket, and the magnetic yoke is arranged between the bracket and the armature, and the armature is driven by utilizing the attraction generated by electrifying the magnetic yoke. The increased number of parts reduces stability and consistency in assembly and subsequent operational stability.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a tripping mechanism.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a trip mechanism, comprising:

the static iron core is made of magnetic conductive materials, two sides of the static iron core are bent to form brackets for fixing the movable iron core, and any bracket extends towards the swing direction of the movable iron core to form a stop block with a limit groove;

the movable iron core is rotatably arranged between the two brackets, and the lower side of the movable iron core is arranged in the limit groove;

the thermal element is positioned between the movable iron core and the static iron core and is fixedly connected with the static iron core.

The outside of support is equipped with and is used for forming spacing complex location boss with the lateral wall of base.

The number of the positioning bosses is 2, the positioning bosses are longitudinally arranged on the side face of the bracket, and the size of the positioning boss on the upper side is larger than that of the positioning boss on the lower side.

The movable iron core extends upwards to form a reset push rod for adjusting the tripping force of the counter-force spring.

The upper side of the static iron core is provided with a hook part which is arranged corresponding to the reset push rod.

The reset push rod is provided with a transverse plate which is transversely arranged, and a plurality of grooves with different depths are formed in the transverse plate.

The width of the movable iron core is larger than that of the static iron core.

And a magnetism increasing mechanism is arranged on one surface of the static iron core, which is not contacted with the thermal element.

The magnetism increasing mechanism is a magnetism increasing block and is fixed on the static iron core in a riveting mode.

The utility model has the beneficial effects that: the integral static iron core structure is adopted, the old static iron core and the stainless steel bracket are creatively changed into one piece, and the number of parts and the process complexity are reduced; meanwhile, the stability and consistency of instantaneous tripping of the circuit breaker are improved.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

FIG. 2 is a schematic cross-sectional view of the present utility model.

Fig. 3 is a front view of the present utility model.

Fig. 4 is a schematic structural view of the moving core of the present utility model.

Fig. 5 is a schematic structural view of the static iron core of the present utility model.

FIG. 6 is a schematic cross-sectional view of the present utility model mated with a base.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

As shown, the present utility model discloses a trip mechanism, which includes:

the static iron core 1 is made of magnetic conductive materials, two sides of the static iron core are bent to form a bracket 11 for fixing the movable iron core, and any bracket extends towards the swing direction of the movable iron core to form a stop block 12 with a limit groove 14; the original stainless steel bracket (non-magnetic conductive material) and the static iron core (magnetic conductive material) are integrated, and the original 2 parts are changed into one part, so that the number of parts and the process complexity are reduced;

the number of the stop blocks 12 can be two, and the stop blocks extend from the brackets at two sides, so that the swing angle of the movable iron core can be well limited.

The support of the static iron core is in inclined plane with the side contacted with the movable iron core, and the inclined plane is arranged from top to bottom in the direction away from the movable iron core, and the support is used as a magnetic pole 13 by utilizing the material characteristics of the support.

The movable iron core 2 is rotatably arranged between the two brackets, the lower side of the movable iron core is arranged in the limiting groove, two sides of the movable iron core are bent to form mounting seats 23, pin holes are formed in the mounting seats, pin joint holes are formed in corresponding positions on the brackets of the static iron core, and the movable iron core respectively penetrates through the pin holes and the pin joint holes through the pin shafts, so that the movable iron core can rotate relative to the static iron core, limit is carried out on a limiting structure of the static iron core, and a magnetic attraction gap of the movable iron core is ensured;

one end of the pin shaft is provided with a step for limiting unidirectional fixation, namely, the step can form limit fit with the support which is initially inserted when the pin shaft is inserted into the pin hole.

The bottom of the movable iron core forms a concave structure to form an attracted end 24, and the attracted end on any side can be placed in the limit groove, and the movable iron core is attracted by the static iron core by utilizing the magnetic attraction between the magnetic pole and the attracted end, so as to perform automatic cutting.

The thermal element comprises a connecting plate 3 and a double-gold sheet 4, is positioned between the movable iron core and the static iron core, is fixedly connected with the static iron core, wherein the connecting plate 3 is L-shaped, is arranged between two brackets of the static iron core, is higher than the static iron core in the upper end, and is fixedly connected with the static iron core in a riveting manner;

the double-gold-sheet bottom is fixedly arranged at the matching position of the connecting plate and the static iron core, the thermal element is composed of a flat bimetallic strip and the like, the lower end part of the thermal element is fixedly connected with the connecting plate, a platform 18 is arranged at the contact position of the connecting plate and the static iron core, and meanwhile, the upper side of the connecting plate is attached to the static iron core, so that a certain gap exists between the thermal element and the connecting plate.

The bottom of the movable iron core is arranged in a limit groove of a stop block which is extended out of the bracket and provided with a limit groove, the stop block can relatively move along the length of the limit groove and is limited by the bulge at the tail end, so that the maximum action distance of the movable iron core is ensured, and the magnetic attraction gap of the movable iron core is ensured.

The outside of support is equipped with and is used for forming spacing complex location boss with the lateral wall of base, and this location boss is used for improving the stability of moving the iron core with the lateral wall cooperation, and this location boss is the dot.

The location boss is 2, and vertically sets up in the side of support, and the size of the location boss that is located the upside is greater than the location boss that is located the downside, is equipped with guide way 6 on the lateral wall, the guide way is big-end-up's form, and wherein the width of guide way upside and big location boss 16 looks adaptation can constitute interference fit. The small positioning boss 17 is used for guiding, and the large positioning boss and the base form special interference fit to play a limiting role, so that the instantaneous tripping stability of the circuit breaker can be greatly improved.

The plunger extends upward to form a return push rod 21 for adjusting the trip force of the reaction spring, and the return push rod can be one or two.

The upper side of the static iron core is provided with a hook part 15 which is arranged corresponding to the reset push rod, the hook part is arranged downwards and is used for fixing the counter-force spring.

The reset push rod is provided with a transverse plate which is transversely arranged, a plurality of grooves 22 with different depths are formed in the transverse plate, the counter force spring can be adjusted in the grooves, and then the tripping force of the instant spring is adjusted by adjusting different gear positions of the counter force spring hanger, so that the production efficiency is improved.

The width A of the movable iron core is larger than the width of the static iron core, so that the magnetic force of the static iron core when the movable iron core is attracted can be output more stably, and the tripping characteristic of the circuit breaker is guaranteed.

The width B of the rotating center of the movable iron core is larger than the width of the reset push rod, and the rotating friction of the mechanism is minimized in the action process.

One side of the static iron core, which is not contacted with the connecting plate, is provided with a magnetism increasing mechanism 5 which is arranged on the other side of the static iron core and used for improving the electromagnetic attraction of the static iron core. The magnetism increasing mechanism is a magnetism increasing block which is riveted and fixed on the static iron core, and the magnetism increasing block is made of electromagnetic materials, so that electromagnetic attraction of the magnetism increasing mechanism is improved.

The examples should not be construed as limiting the utility model, but any modifications based on the spirit of the utility model should be within the scope of the utility model.

Claims

1. A trip mechanism, characterized by: it comprises the following steps:

2. The trip mechanism of claim 1, wherein: the outside of support is equipped with and is used for forming spacing complex location boss with the lateral wall of base.

3. The trip mechanism of claim 2, wherein: the number of the positioning bosses is 2, the positioning bosses are longitudinally arranged on the side face of the bracket, and the size of the positioning boss on the upper side is larger than that of the positioning boss on the lower side.

4. The trip mechanism of claim 1, wherein: the movable iron core extends upwards to form a reset push rod for adjusting the tripping force of the counter-force spring.

5. The trip mechanism of claim 4, wherein: the upper side of the static iron core is provided with a hook part which is arranged corresponding to the reset push rod.

6. The trip mechanism of claim 4, wherein: the reset push rod is provided with a transverse plate which is transversely arranged, and a plurality of grooves with different depths are formed in the transverse plate.

7. The trip mechanism of claim 1, wherein: the width of the movable iron core is larger than that of the static iron core.

8. The trip mechanism of claim 1, wherein: and a magnetism increasing mechanism is arranged on one surface of the static iron core, which is not contacted with the thermal element.

9. The trip mechanism of claim 8, wherein: the magnetism increasing mechanism is a magnetism increasing block and is fixed on the static iron core in a riveting mode.