CN-224204069-U - Breaker pivot buffering unloads power structure

CN224204069UCN 224204069 UCN224204069 UCN 224204069UCN-224204069-U

Abstract

The utility model provides a breaker rotating shaft buffering and unloading structure which comprises a rotating shaft, a stop block, an elastic piece and a gas blocking cover, wherein the stop block is movably arranged on the rotating shaft and is used for propping against a matching block on an installation section, the elastic piece is arranged between the stop block and the rotating shaft, and the elastic piece is positioned at one side of the stop block away from the matching block. In addition, the gas shield can prevent the electric arc from climbing backwards along the moving contact to prevent the contact from being burnt out, and can prevent particulate matters and high-temperature gas from damaging the stop block and the conductive system, thereby guaranteeing the reliability of the segment test of the circuit breaker.

Inventors

LIU WEIQIANG
YUAN HUI
ZHENG CHUNHUA
GAO TENGFEI
CHEN FENGFEI
FANG CHAO
Wen Xiaochuan
WU CHAOPENG

Assignees

浙江天正电气股份有限公司
浙江天正智能电器有限公司

Dates

Publication Date: 20260505
Application Date: 20250430

Claims (8)

1. The utility model provides a circuit breaker pivot buffering unloads power structure which characterized in that includes: The rotating shaft (1) is provided with a moving contact (2), the moving contact (2) is provided with a mounting section (3), a connecting section (4) and a contact section (5) which are sequentially connected, the mounting section (3) is assembled with the rotating shaft (1), and the contact section (5) is provided with a moving contact (6); The stop block (7) is movably arranged on the rotating shaft (1) and is used for propping against the matching block (8) on the mounting section (3); the elastic piece (9) is arranged between the stop block (7) and the rotating shaft (1), and the elastic piece (9) is positioned at one side of the stop block (7) away from the matching block (8).
2. The breaker rotating shaft buffering and force unloading structure according to claim 1, wherein the rotating shaft (1) comprises two opposite mounting plates (10), strip holes (11) are correspondingly formed in the two mounting plates (10), the stop block (7) is mounted between the two mounting plates (10), connecting shafts (12) extending into the strip holes (11) are arranged at two ends of the stop block, and the connecting shafts (12) can move in the strip holes (11).
3. The circuit breaker spindle buffer unloading structure according to claim 1 or 2, characterized in that the elastic element (9) is a spring.
4. A circuit breaker rotating shaft buffering and unloading structure according to claim 3, characterized in that the stop block (7) is formed with a first positioning groove (13) for one end of the spring to extend in, and the rotating shaft (1) is formed with a second positioning groove (14) for the other end of the spring to extend in.
5. The circuit breaker spindle buffer unloading structure according to claim 1, further comprising a gas shield (15), the gas shield (15) having a first shield portion (16) assembled with the moving contact (2) connecting section (4), and a second shield portion (17) integrally connected with the first shield portion (16) and extending between the spindle (1) and a circuit breaker base (18).
6. The breaker spindle buffer force relief structure of claim 5, wherein the first cover portion (16) is U-shaped, and two risers (19) of the U-shaped first cover portion (16) are assembled with the connection section (4) by rivets (20).
7. The breaker spindle buffer unloading structure according to claim 6, wherein the spindle (1) is formed with a movable groove (21) for the connection section (4) to swing, and the second cover portion (17) has a gas blocking portion (22) extending outward from one end connected to the riser (19) for blocking the movable groove (21).
8. The breaker spindle buffering force relief structure of claim 5, wherein said second cover portion (17) is an arcuate structure.

Description

Breaker pivot buffering unloads power structure Technical Field The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker rotating shaft buffering and unloading structure. Background The existing circuit breaker comprises a rotating shaft and a moving contact arranged on the rotating shaft, the moving contact realizes rapid opening and closing action through the driving of the rotating shaft, but under the conditions of high breaking capacity or frequent operation, the impact force generated by the breaking moment of the moving contact can act on the local area of the rotating shaft, and under the long-term impact load, the rotating shaft is easy to crack and even break, so that the service life of the circuit breaker is shortened. Disclosure of utility model Therefore, the technical problem to be solved by the utility model is to overcome the defects that the rotating shaft in the prior art is easy to be broken by the impact of the moving contact and the service life of the product is short, so as to provide the breaker rotating shaft buffering and unloading structure with long service life. The utility model provides a breaker rotating shaft buffering and unloading structure which comprises a rotating shaft, a stop block and an elastic piece, wherein the rotating shaft is provided with a moving contact, the moving contact is provided with a mounting section, a connecting section and a contact section which are sequentially connected, the mounting section is assembled with the rotating shaft, the contact section is provided with a moving contact, the stop block is movably arranged on the rotating shaft and is used for propping against a matching block on the mounting section, the elastic piece is arranged between the stop block and the rotating shaft, and the elastic piece is positioned on one side of the stop block away from the matching block. The rotating shaft comprises two opposite mounting plates, strip holes are correspondingly formed in the two mounting plates, the stop block is arranged between the two mounting plates, connecting shafts extending into the strip holes are arranged at two ends of the stop block, and the connecting shafts can move in the strip holes. The elastic piece is a spring. The stop block is formed with a first positioning groove for one end of the spring to extend in, and the rotating shaft is formed with a second positioning groove for the other end of the spring to extend in. The gas shield is provided with a first shield part assembled with the movable contact connecting section and a second shield part which is integrally connected with the first shield part and extends to a position between the rotating shaft and the circuit breaker base. The first cover part is U-shaped, and two vertical plates of the U-shaped first cover part are assembled with the connecting section through rivets. The rotating shaft is provided with a movable groove for the connecting section to swing, and the second cover part is provided with a gas blocking part which extends outwards from one end connected with the vertical plate and is used for blocking the movable groove. The second cover part is of an arc-shaped structure. The technical scheme of the utility model has the following advantages: 1. The breaker rotating shaft buffering and unloading structure comprises the rotating shaft, the stop block and the elastic piece, wherein when the breaker rotating shaft is disconnected, the matching block of the moving contact impacts the stop block and then extrudes the elastic piece, so that the impact force of the moving contact is buffered, and the service life of the rotating shaft is prolonged. 2. The breaker rotating shaft buffering force unloading structure provided by the utility model has the advantages that the rotating shaft comprises two oppositely arranged mounting plates, the two mounting plates are correspondingly provided with the strip holes, when the breaker rotating shaft is assembled, the connecting shafts at the two ends of the stop block are arranged in the strip holes, and the connecting shafts can move in the strip holes, so that the stop block is allowed to move relative to the rotating shaft, in addition, even if the stop block is damaged, the stop block is only required to be replaced, and the maintenance and replacement cost is reduced. 3. According to the breaker rotating shaft buffering and unloading structure, the gas shield is provided with the first shield part assembled with the moving contact connecting section and the second shield part integrally connected with the first shield part and extending to the space between the rotating shaft and the breaker base, so that on one hand, an arc can be prevented from climbing backwards along the moving contact to prevent the contact from being burnt out, on the other hand, particulate matters and high-temperature gas can be prevented from damaging a stop block and a conductive sy