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CN-122025482-A - Operating mechanism and circuit breaker

CN122025482ACN 122025482 ACN122025482 ACN 122025482ACN-122025482-A

Abstract

The invention provides an operating mechanism and a circuit breaker, and relates to the technical field of electrical equipment. The operating mechanism comprises a contact assembly and a handle. The contact assembly comprises a contact seat, a moving contact, a fixed contact and a first elastic piece, at least part of the moving contact is movably arranged in a clamping groove of the contact seat, the first elastic piece is connected with the moving contact, a handle is in transmission connection with the contact seat and is used for driving the contact seat to move so as to drive the moving contact and the fixed contact to be switched on or off. In the switching-on process, the contact seat drives the moving contact to synchronously move, the moving contact and the contact seat are relatively static, after the moving contact contacts with the static contact to switch on, the moving contact and the clamping groove relatively move, and the first elastic piece generates elastic force to act on the moving contact so as to increase the contact force between the moving contact and the static contact. Therefore, the operating mechanism is simple in structure, small in number of parts, convenient to assemble, low in production cost and capable of effectively improving the running stability of the operating mechanism.

Inventors

  • PAN WANJUN
  • LIN CHEN
  • ZHAO QING

Assignees

  • 上海良信电器股份有限公司
  • 良信电器(海盐)有限公司

Dates

Publication Date
20260512
Application Date
20260402

Claims (10)

  1. 1. An operating mechanism, comprising: The contact assembly (100), the contact assembly (100) comprises a contact seat (110), a moving contact (120), a fixed contact (130) and a first elastic piece (140), the contact seat (110) is provided with a clamping groove (111), the moving contact (120) is partially and movably arranged in the clamping groove (111), and the first elastic piece (140) is connected with the moving contact (120); the handle (200) is in transmission connection with the contact seat (110), and the handle (200) is used for driving the contact seat (110) to move so as to drive the movable contact (120) to be switched on or switched off with the fixed contact (130); In the closing process, the contact base (110) drives the moving contact (120) to synchronously move, the moving contact (120) and the contact base (110) are relatively static, and after the moving contact (120) and the static contact (130) are contacted to be closed, the moving contact (120) moves in the clamping groove (111).
  2. 2. The operating mechanism according to claim 1, wherein the contact assembly (100) further comprises a rotating shaft (150), the contact base (110) is movably arranged on the rotating shaft (150), the handle (200) is in transmission connection with one end of the contact base (110), the clamping groove (111) is formed in the other end of the contact base (110), the moving contact (120) is provided with a clamping portion (121), and the clamping portion (121) is movably arranged in the clamping groove (111).
  3. 3. The operating mechanism according to claim 2, wherein the catch (121) comprises a first end (122) and a second end (123), the dimensions of the catch (111) corresponding to the second end (123) being larger than the dimensions of the catch (111) corresponding to the first end (122) such that the second end (123) can rotate about the first end (122).
  4. 4. An operating mechanism according to claim 3, wherein one end of the moving contact (120) is provided with a moving contact portion (124), the other end is provided with a connecting portion (125), the connecting portion (125) is connected with the first elastic member (140), the holding portion (121) is disposed between the moving contact portion (124) and the connecting portion (125), and the first end (122) is located near one end of the moving contact portion (124).
  5. 5. The operating mechanism according to claim 2, wherein a limiting portion (112) is provided in the clamping groove (111), and the limiting portion (112) is used for limiting the axial movement of the clamping portion (121).
  6. 6. An operating mechanism according to claim 2, characterized in that the end of the contact base (110) is further provided with a blocking surface (113).
  7. 7. The operating mechanism of claim 1, further comprising a trip assembly (300), wherein the trip assembly (300) comprises a trip (310), a trip (320), a trip (330) and a latch (340), the handle (200) is in transmission connection with the contact base (110) through the trip (330), the trip (330) and the latch (340) are disposed on the contact base (110) and are locked with each other, and the trip (310) is used for driving the trip (320) to move so as to drive the trip (330) and the latch (340) to trip the moving contact (120) and the fixed contact (130).
  8. 8. The operating mechanism of claim 7, wherein the trip assembly (300) further comprises a second resilient member (350), the second resilient member (350) acting on the latch member (340) to maintain the latch member (340) and the trip member (330) in a latched state.
  9. 9. The operating mechanism of claim 7, wherein the release (310) includes a drive rod (311), the release (310) further includes at least one of a current coil (312) and a voltage coil (313), the current coil (312) is connected to the stationary contact (130) for driving the drive rod (311) to move when an abnormal increase in current of a circuit in which the stationary contact (130) is located increases, and the voltage coil (313) is configured to receive a control signal to control the drive rod (311) to move, and the drive rod (311) is in driving connection with the release member (320).
  10. 10. A circuit breaker comprising an operating mechanism according to any one of claims 1-9.

Description

Operating mechanism and circuit breaker Technical Field The invention relates to the technical field of electrical equipment, in particular to an operating mechanism and a circuit breaker. Background The circuit breaker is mainly used for driving the closing and opening of the moving contact and the fixed contact so as to realize the connection or disconnection of a line. At present, the connection between a movable contact and a contact seat in the existing circuit breaker is fixed by adopting technologies such as bonding or hot riveting, but the working procedure is complex, and the firmness is unreliable. In order to overcome the defects, parts such as snap springs, pressing plates and screws are usually added to enhance the connection reliability, but the number of the parts is increased, so that the internal structure is more complex, the cost of the die and materials is increased, and the assembly process is complicated, so that the production efficiency is influenced. Disclosure of Invention The invention provides an operating mechanism and a circuit breaker, which have simple structure and small number of parts. Embodiments of the invention may be implemented as follows: In a first aspect, the present invention provides an operating mechanism comprising: The contact assembly comprises a contact seat, a moving contact, a fixed contact and a first elastic piece, wherein the contact seat is provided with a clamping groove, the moving contact part is movably arranged in the clamping groove, and the first elastic piece is connected with the moving contact; the handle is in transmission connection with the contact seat and is used for driving the contact seat to move so as to drive the movable contact to be switched on or off with the fixed contact; in the closing process, the contact seat drives the moving contact to synchronously move, the moving contact and the contact seat are relatively static, and after the moving contact contacts with the static contact to be closed, the moving contact moves in the clamping groove. In an alternative embodiment, the contact assembly further comprises a rotating shaft, the contact seat is movably arranged on the rotating shaft, the handle is in transmission connection with one end of the contact seat, the clamping groove is formed in the other end of the contact seat, the moving contact is provided with a clamping portion, and the clamping portion is movably arranged in the clamping groove. In an alternative embodiment, the clamping portion includes a first end and a second end, and the size of the clamping groove corresponding to the second end is larger than the size of the clamping groove corresponding to the first end, so that the second end can rotate around the first end. In an alternative embodiment, one end of the moving contact is provided with a moving contact portion, the other end of the moving contact is provided with a connecting portion, the connecting portion is connected with the first elastic piece, the clamping portion is arranged between the moving contact portion and the connecting portion, and the first end is located near one end of the moving contact portion. In an alternative embodiment, a limiting part is arranged in the clamping groove, and the limiting part is used for limiting the axial movement of the clamping part. In an alternative embodiment, the end of the contact base is further provided with a blocking cambered surface. In an alternative embodiment, the operating mechanism further comprises a tripping component, the tripping component comprises a tripper, a tripping component and a locking component, the handle is in transmission connection with the contact base through the tripping component, the tripping component and the locking component are arranged on the contact base and are mutually locked, and the tripper is used for driving the tripping component to move so as to drive the tripping component to trip the locking component, so that the moving contact and the fixed contact are separated. In an alternative embodiment, the trip assembly further includes a second elastic member that acts on the latch member to maintain the latch member and the trip member in a latched state. In an alternative embodiment, the release comprises a driving rod, the release further comprises at least one of a current coil and a voltage coil, the current coil is connected with the fixed contact and used for driving the driving rod to move when the current of a circuit where the fixed contact is located is abnormally increased, the voltage coil is used for receiving a control signal to control the driving rod to move, and the driving rod is in transmission connection with the release. In a second aspect, the present invention provides a circuit breaker comprising an operating mechanism as in any of the preceding embodiments. The operating mechanism and the circuit breaker have the beneficial effects that the switching-on operation is divided into two