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CN-224232627-U - Circuit breaker

CN224232627UCN 224232627 UCN224232627 UCN 224232627UCN-224232627-U

Abstract

The embodiment of the disclosure provides a circuit breaker, which comprises a shell, a mounting shaft arranged on the shell, a sensor arranged on the shell and provided with a triggering part, a bimetallic strip, an overload alarm rod and an overload alarm rod, wherein the first end of the bimetallic strip is connected with a heating element of the circuit breaker, the overload alarm rod is pivotally connected with the mounting shaft and can be pushed by the second end of the bimetallic strip to rotate around the mounting shaft from an initial position to an alarm position, the triggering part is triggered when the overload alarm rod is in the alarm position, and the overload alarm rod can axially move along the mounting shaft to adjust a first alarm stroke of the overload alarm rod from the initial position to the alarm position and/or a second alarm stroke of the bimetallic strip from the initial state to a second alarm stroke abutting against the overload alarm rod. According to the circuit breaker provided by the embodiment of the disclosure, the delay characteristic of the overload alarming mechanism can be adjusted by adjusting the axial position of the overload alarming rod on the mounting shaft.

Inventors

  • LI DAIBO
  • CAI XIAOLI

Assignees

  • 施耐德电气工业公司

Dates

Publication Date
20260512
Application Date
20250408

Claims (10)

  1. 1. A circuit breaker (100), characterized by comprising: A housing (10); a mounting shaft (21) provided to the housing (10); A sensor (22) provided on the housing (10) and having a trigger portion (221), the sensor (22) emitting alarm information when the trigger portion (221) is triggered; a bimetal (24), a first end (241) of the bimetal (24) being connected to a heating element (31) of the circuit breaker (100), and An overload warning lever (23) pivotally connected to the mounting shaft (21), and Wherein the overload warning lever (23) is capable of being pushed by the second end (242) of the bimetal (24) to rotate about the mounting shaft (21) from an initial position to a warning position, the overload warning lever (23) triggering the triggering portion (221) in the warning position, and The overload warning lever (23) can move axially along the mounting shaft (21) to adjust a first warning stroke of the overload warning lever (23) from the initial position to the warning position and/or a second end (242) of the bimetallic strip (24) from an initial state to a second warning stroke abutting against the overload warning lever (23).
  2. 2. The circuit breaker (100) of claim 1 wherein, The overload warning lever (23) is provided with a first trigger surface (251), the overload warning lever (23) triggers the trigger part (221) through the first trigger surface (251), and When the overload warning lever (23) moves axially along the mounting shaft (21), the distance between the first trigger surface (251) and the trigger part (221) becomes gradually larger or gradually smaller.
  3. 3. The circuit breaker (100) of claim 2 wherein, The overload warning lever (23) is provided with a first trigger member (25) at a position opposite to the sensor (22), the first trigger surface (251) is formed on the first trigger member (25), and The first trigger (25) is connected to the overload warning lever (23) by a first heat adjustment screw (271) so that the position of the first trigger (25) can be adjusted in a direction perpendicular to the axial direction of the mounting shaft (21).
  4. 4. The circuit breaker (100) of claim 3 wherein, One end of the overload warning lever (23) is provided with a mounting recess (230), the first trigger member (25) is in non-rotatable engagement with the mounting recess (230), and The first trigger piece (25) is provided with a T-shaped groove (250), the head part (2711) of the first heat regulating screw (271) is clamped into the T-shaped groove (250), and the threaded rod part (2712) of the first heat regulating screw (271) is in threaded connection with the wall body (2301) of the mounting concave part (230).
  5. 5. The circuit breaker (100) of claim 4, wherein the first trigger face (251) is beveled and/or the first trigger member (25) is formed with a boss portion (252) overlapping an edge of the mounting recess (230).
  6. 6. The circuit breaker (100) of claim 1 wherein, A second heat adjusting screw (272) is arranged on the overload alarming rod (23), The second end (242) of the bimetal (24) is provided with a second trigger piece (26), the second trigger piece (26) is provided with a second trigger surface (261), the second trigger surface (261) is used for abutting against the second heat regulating screw (272) to push the overload alarming lever (23) to rotate from the initial position to the alarming position, and Wherein when the overload warning lever (23) moves axially along the mounting shaft (21), the distance between the second heat adjusting screw (272) and the second trigger surface (261) becomes gradually larger or gradually smaller.
  7. 7. The circuit breaker (100) of claim 6 wherein, The second triggering surface (261) is inclined, and/or The second end (242) of the bimetallic strip (24) is provided with a positioning hole, the second trigger piece (26) is provided with a clamping groove (260), at least one side wall of the clamping groove (260) is provided with a positioning protrusion (262), the second end (242) of the bimetallic strip (24) is inserted into the clamping groove (260), and the positioning protrusion (262) is clamped with the positioning hole.
  8. 8. The circuit breaker (100) of any one of claims 1 to 7, wherein the circuit breaker (100) further comprises a thermal knob (28), the thermal knob (28) being engaged with the overload warning lever (23) to drive the axial movement of the overload warning lever (23) along the mounting shaft (21).
  9. 9. The circuit breaker (100) of claim 8 wherein, The overload warning lever (23) is provided with a sliding groove (234), the extending direction of the sliding groove (234) is perpendicular to the axial direction of the mounting shaft (21), and The heat adjustment knob (28) comprises a central post (281) and an eccentric post (282), the axis of the central post (281) is perpendicular to the axis of the mounting shaft (21) and the axis of the central post (281) serves as the rotation axis of the heat adjustment knob (28), the axis of the eccentric post (282) is parallel to the axis of the central post (281), and the eccentric post (282) is in sliding fit with the sliding groove (234).
  10. 10. The circuit breaker (100) of any of claims 1 to 7 wherein, The overload alarm lever (23) comprises a first main body part (231) and a plurality of first sleeving parts (233) protruding relative to the first main body part, and the plurality of first sleeving parts (233) are sleeved on the mounting shaft (21); The circuit breaker (100) further comprises a magnetic tripping mechanism (40), the magnetic tripping mechanism comprises a tripping rod (41), the tripping rod (41) comprises a second main body part (411) and a plurality of second sleeving parts (412) protruding relative to the second main body part (411), the plurality of second sleeving parts (412) are sleeved on the mounting shaft (21), The plurality of second socket parts (412) and the plurality of first socket parts (233) are arranged at intervals along the axial direction of the mounting shaft (21).

Description

Circuit breaker Technical Field Embodiments of the present disclosure relate generally to the field of electrical equipment, and more particularly to a circuit breaker. Background Circuit breakers are commonly used safety protection devices in electrical wiring. Circuit breakers used in general locations include thermal and magnetic trip functions, and a trip mechanism trips to cut off current when an overload or short circuit occurs in the circuit. For some special sites, such as sites related to fire protection, chemical industry and medical treatment, when an overload condition occurs in a circuit, the circuit is not generally cut off, but an overload alarm signal is output, and when the circuit is short-circuited, the magnetic tripping mechanism trips to immediately cut off the circuit. Disclosure of utility model The disclosure provides a circuit breaker including a housing, a mounting shaft provided on the housing, a sensor provided on the housing and having a trigger portion, the sensor emitting an alarm message when the trigger portion is triggered, a bimetal having a first end connected with a heating element of the circuit breaker, and an overload alarm lever pivotally connected with the mounting shaft, and wherein the overload alarm lever can be pushed by a second end of the bimetal to rotate from an initial position about the mounting shaft to an alarm position, the overload alarm lever triggers the trigger portion when in the alarm position, and the overload alarm lever can be axially moved along the mounting shaft to adjust a first alarm stroke of the overload alarm lever rotating from the initial position to the alarm position and/or a second alarm stroke of the bimetal abutting the overload alarm lever from the initial state to a second alarm stroke. In some embodiments, the overload warning lever is provided with a first trigger surface, the overload warning lever triggers the trigger portion through the first trigger surface, and when the overload warning lever moves axially along the mounting shaft, the distance between the first trigger surface and the trigger portion becomes progressively larger or smaller. In some embodiments, a first trigger member is provided at a position of the overload warning lever opposite to the sensor, a first trigger surface is formed on the first trigger member, and the first trigger member is connected to the overload warning lever by a first heat adjustment screw so as to be able to adjust the position of the first trigger member in a direction perpendicular to an axial direction of the mounting shaft. In some embodiments, one end of the overload warning lever is provided with a mounting recess, the first trigger piece is matched with the mounting recess in a non-rotatable manner, and the first trigger piece is provided with a T-shaped groove, the head of the first heat regulating screw is clamped into the T-shaped groove, and the threaded rod part of the first heat regulating screw is in threaded connection with the wall body of the mounting recess. In some embodiments, the first trigger is beveled and/or the first trigger is formed with a boss portion that overlaps the edge of the mounting recess. In some embodiments, a second heat adjustment screw is provided on the overload warning lever, a second end of the bimetal is provided with a second trigger piece, the second trigger piece has a second trigger surface for abutting the second heat adjustment screw to push the overload warning lever to rotate from an initial position to an alarm position, and wherein a distance between the second heat adjustment screw and the second trigger surface becomes progressively larger or smaller when the overload warning lever moves axially along the mounting shaft. In some embodiments, the second trigger surface is an inclined surface, and/or the second end of the bimetal is provided with a positioning hole, the second trigger piece is provided with a clamping groove, at least one side wall of the clamping groove is provided with a positioning protrusion, and the second end of the bimetal is inserted into the clamping groove and is clamped with the positioning hole. In some embodiments, the circuit breaker further includes a thermal knob that engages the overload warning lever to drive axial movement of the overload warning lever along the mounting shaft. In some embodiments, the overload warning lever is provided with a sliding groove, the direction of extension of which is perpendicular to the axial direction of the mounting shaft, and the thermal adjustment knob comprises a central post, the axis of which is perpendicular to the axis of the mounting shaft and the axis of which acts as the axis of rotation of the thermal adjustment knob, and an eccentric post, the axis of which is parallel to the axis of the central post, and which is in sliding engagement with the sliding groove. In some embodiments, the overload warning lever comprises a first main body part and a p