Search

CN-224232626-U - Quick closing mechanism for circuit breaker

CN224232626UCN 224232626 UCN224232626 UCN 224232626UCN-224232626-U

Abstract

The utility model discloses a quick closing mechanism for a circuit breaker, which comprises a handle (1) rotatably connected in a circuit breaker shell, wherein the handle (1) and the circuit breaker shell are connected with each other through a handle spring (2), one side of the handle (1) is provided with a moving contact (3) connected with an executing mechanism, the moving contact (3) is rotatably connected with the executing mechanism, a contact spring (4) is connected between the moving contact (3) and the executing mechanism, the outer side of the moving contact (3) is provided with an energy storage piece (5) rotatably connected with the circuit breaker shell, and the inner side of the energy storage piece (5) is mutually attached to the handle spring (2). The utility model has the characteristics of simple structure and small occupied space.

Inventors

  • XU XIANGBING
  • JI YONGYI

Assignees

  • 美高电气科技有限公司

Dates

Publication Date
20260512
Application Date
20250527

Claims (6)

  1. 1. The quick closing mechanism for the circuit breaker comprises a handle (1) which is rotationally connected in a circuit breaker shell, wherein the handle (1) is connected with the circuit breaker shell through a handle spring (2), one side of the handle (1) is provided with a moving contact (3) which is connected with an actuating mechanism, the quick closing mechanism is characterized in that the moving contact (3) is rotationally connected to the actuating mechanism, a contact spring (4) is connected between the moving contact (3) and the actuating mechanism, the outer side of the moving contact (3) is provided with an energy storage piece (5) which is rotationally connected with the circuit breaker shell, and the inner side of the energy storage piece (5) is mutually attached to the handle spring (2); the handle spring (2) is used for limiting the energy storage piece (5) to enable the energy storage piece (5) to be in an energy storage position; The energy storage piece (5) is used for buckling and limiting the moving contact (3) at the energy storage position, so that the contact spring (4) is contracted along with the follow-up closing action of the actuating mechanism after the moving contact (3) is limited; The handle (1) is used for extruding the energy storage part (5) in the closing process, so that the energy storage part (5) overcomes the elasticity of the handle spring (2) under the extrusion action and releases the buckling limit of the movable contact (3).
  2. 2. The quick closing mechanism for a circuit breaker according to claim 1, wherein one end of the handle spring (2) extends to the outer side of the handle (1) and forms a reset lever (201), and the inner side of the energy storage member (5) is mutually attached to the reset lever (201) through the energy storage lever (501).
  3. 3. The quick closing mechanism for a circuit breaker according to claim 1, wherein a buckling groove (502) is formed on one side of the energy storage member (5), and one side of the moving contact (3) extends to the outer side of the actuating mechanism and forms a limiting part (301) for buckling and connecting the buckling groove (502).
  4. 4. The quick closing mechanism for a circuit breaker according to claim 1, wherein the energy storage member (5) is provided with a pressure receiving portion (503) on a side away from the engagement groove (502), and the handle (1) on the pressure receiving portion (503) side is provided with a pressing portion (101) for engaging with the pressure receiving portion (503).
  5. 5. The quick closing mechanism for a circuit breaker according to claim 4, wherein the handle (1) at one side of the pressing part (101) is provided with an interception surface (102) matched with the energy storage element (5), and the interception surface (102) is used for limiting rotation of the energy storage element (5) so as to enable the energy storage element (5) to be in an energy storage position.
  6. 6. The quick closing mechanism for a circuit breaker according to claim 5, wherein the blocking surface (102) has a circular arc shape, the pressed portion (503) has a V-shape, and a first contact surface for attaching the blocking surface (102) and a second contact surface for contacting the pressing portion (101) are formed on both sides of the pressed portion (503).

Description

Quick closing mechanism for circuit breaker Technical Field The utility model relates to a circuit breaker, in particular to a quick closing mechanism for the circuit breaker. Background The moving contact can generate a large amount of electric arcs when approaching the fixed contact, so that the burning loss of the contact position of the moving contact and the service life of the moving contact are influenced, the closing speed of the moving contact needs to be improved as much as possible when the moving contact is closed, and the electric arc quantity generated when the moving contact approaches the fixed contact is reduced. However, the moving contact is limited by the closing action of the conventional circuit breaker, so that the rotating position of the moving contact is directly related to the rotating position of the handle, and further, when an operator performs irregular operation such as slow closing or shaking the handle, the moving contact is easy to repeatedly contact with the fixed contact, so that the arc release amount of the circuit breaker in the closing process is greatly increased, and the service life of the circuit breaker is reduced. On the basis, patent 202411231666.8 discloses a quick closing mechanism for a circuit breaker, which stores energy through a contact spring when a handle is switched on in the earlier stage, and releases the limit of a moving contact when the handle rotates to a trigger position, so that the moving contact is driven to be closed quickly by the resilience force of the contact spring. Although the structure can stably realize the quick closing function of the moving contact, the structure and the action of the quick closing mechanism are limited, so that the structure and the action of the quick closing mechanism inevitably occupy the thickness space of the circuit breaker to increase the thickness of the circuit breaker, and on the other hand, the quick closing mechanism is hidden at the inner side of the actuating mechanism to increase the assembly difficulty of manufacturers to the circuit breaker. Therefore, the existing quick closing mechanism of the circuit breaker has the problems of complex structure and large space occupation. Disclosure of utility model The utility model aims to provide a quick closing mechanism for a circuit breaker. The device has the characteristics of simple structure and small occupied space. The quick closing mechanism for the circuit breaker comprises a handle rotationally connected in a circuit breaker shell, wherein the handle is connected with the circuit breaker shell through a handle spring, one side of the handle is provided with a moving contact connected with an executing mechanism, the moving contact is rotationally connected to the executing mechanism, a contact spring is connected between the moving contact and the executing mechanism, the outer side of the moving contact is provided with an energy storage piece rotationally connected with the circuit breaker shell, and the inner side of the energy storage piece is mutually attached to the handle spring; The handle spring is used for limiting the energy storage part to enable the energy storage part to be in an energy storage position; The energy storage piece is used for buckling and limiting the moving contact in the energy storage position, so that the contact spring is contracted along with the follow-up closing action of the actuating mechanism after the moving contact is limited; The handle is used for extruding the energy storage part in the closing process, so that the energy storage part overcomes the elasticity of the handle spring under the extrusion action and releases the buckling limit of the moving contact. In the quick closing mechanism for the circuit breaker, one end of the handle spring extends to the outer side of the handle to form the reset rod, and the inner side of the energy storage piece is mutually attached to the reset rod through the energy storage rod. In the quick closing mechanism for the circuit breaker, a buckling groove is formed on one side of the energy storage piece, and one side of the moving contact extends to the outer side of the actuating mechanism and forms a limiting part for buckling and connecting the buckling groove. In the quick closing mechanism for the circuit breaker, the energy storage piece forms a pressed part at one side far away from the buckling groove, and the handle at one side of the pressed part is provided with the pressing part matched with the pressed part. In the quick closing mechanism for the circuit breaker, the blocking section matched with the energy storage piece is arranged on the handle on one side of the extrusion part, and the blocking surface is used for limiting the rotation of the energy storage piece, so that the energy storage piece is located at the energy storage position. In the quick closing mechanism for the circuit breaker, the blocking section is circular in shape, the pre