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CN-224232615-U - Circuit breaker

CN224232615UCN 224232615 UCN224232615 UCN 224232615UCN-224232615-U

Abstract

The utility model discloses a circuit breaker, which comprises a base and three contact system cavities divided by a partition plate side by side, wherein an energy storage mechanism, three contact mechanisms and a closing and opening mechanism for controlling the contact mechanisms to be connected or disconnected are arranged in the contact system cavities, the closing and opening mechanism comprises a closing assembly and an opening assembly, the energy storage mechanism comprises an energy storage shaft and an energy storage spring, a first stop block matched with the closing assembly, a driving disc eccentrically arranged and matched with the contact mechanisms, an opening head matched with the opening assembly and the contact mechanisms and a gear transmission assembly in transmission connection with the contact mechanisms are arranged on the energy storage shaft, a first crank arm connected with the energy storage spring is further arranged on the energy storage shaft, and the other end of the energy storage spring is connected with the partition plate, and the closing assembly, the opening assembly, the three contact mechanisms and the energy storage mechanism are in linkage. The defect that the manual plate brake of the existing circuit breaker needs large external force operation is overcome.

Inventors

  • Xie Taiyong

Assignees

  • 云南长舟电气有限公司

Dates

Publication Date
20260512
Application Date
20250604

Claims (10)

  1. 1. The breaker comprises a base and a partition board, and is characterized in that an energy storage mechanism, three contact mechanisms and a switching-on and switching-off mechanism for controlling the contact mechanisms to be connected or disconnected are arranged in the contact system, the switching-on and switching-off mechanism comprises a switching-on assembly and a switching-off assembly, the energy storage mechanism comprises an energy storage shaft and an energy storage spring, a first stop block matched with the switching-on assembly, a driving disc matched with the contact mechanisms, a switching-off head matched with the switching-off assembly and the contact mechanisms and a gear transmission assembly in transmission connection with the contact mechanisms are arranged on the energy storage shaft, a first crank arm connected with the energy storage spring is further arranged on the energy storage shaft, and the other end of the energy storage spring is connected with the partition board, and the switching-on assembly, the switching-off assembly, the three contact mechanisms and the energy storage mechanism are in linkage.
  2. 2. The circuit breaker according to claim 1, wherein the closing assembly comprises a closing button, a first moving rod moving horizontally and a first limiting rod connected to one end of the first moving rod, a first return spring is sleeved on the first limiting rod, a first sliding block capable of moving along the first limiting rod is arranged between the first return spring and the first limiting rod in a penetrating mode, a first moving guide surface is arranged on one side, where the first sliding block is attached to the first moving rod, a first sliding groove is formed in the first moving rod in the length direction, the other end of the first moving rod abuts against a lock hook, the upper side of the lock hook is rotatably mounted on the partition board, and the hook portion of the lock hook abuts against the first stop block.
  3. 3. The circuit breaker according to claim 2, wherein the opening assembly comprises an opening button, a second moving rod, one end of the second moving rod is connected with a second limiting rod, a second return spring is sleeved on the second limiting rod, a second sliding block capable of moving along the second limiting rod is arranged between the second return spring and the second limiting rod in a penetrating mode, one side, which is attached to the second sliding block, of the second moving rod is provided with a second moving guide surface, a second sliding groove which is arranged along the length direction is formed in the second moving rod, the other end of the second moving rod abuts against a lock catch, the lower side of the lock catch is rotatably installed on the partition board through an inserting shaft, a spring piece is elastically supported between the upper side of the lock catch and the partition board, a second stop block is fixed at the distal end of the inserting shaft, and the second stop block abuts against the opening head.
  4. 4. The circuit breaker of claim 3, wherein the energy storage mechanism further comprises an electric energy storage assembly and a manual energy storage assembly, the electric energy storage assembly comprises a rotating shaft arranged on the partition plate, the gear transmission assembly comprises a driving gear arranged on the rotating shaft and a driven gear of the energy storage shaft, the driving gear and the driven gear are sleeved with a transmission belt, the electric energy storage assembly further comprises a motor, the motor is in transmission connection with the rotating shaft, the manual energy storage assembly comprises an operating handle, a fourth crank arm is arranged on the rotating shaft, the tail end of the fourth crank arm is connected with the operating handle through an energy storage connecting rod, the lower side of the brake separating head is in butt joint with a fifth crank arm on the rotating shaft, and a sixth swing arm in butt joint with the driving disc is further arranged on the rotating shaft.
  5. 5. The circuit breaker according to claim 1, wherein the partition board is provided with an energy storage indication board, the energy storage shaft is provided with a second crank arm matched with the energy storage indication board, the bottom of one side of the energy storage indication board is connected with a first extension section, the bottom of the first extension section is rotationally arranged on the partition board through a linkage shaft, the first extension section is provided with a first swing arm which is abutted to the second crank arm, and the second crank arm is used for switching the state of stored energy or not stored energy on the energy storage indication board.
  6. 6. The circuit breaker according to claim 1, wherein the partition plate is provided with a switching-on/off indication plate, the energy storage shaft is provided with a second swing arm matched with the switching-on/off indication plate, the partition plate is provided with a limit plate, the switching-on/off indication plate is slidably mounted on the limit plate, the switching-on/off indication plate is horizontally connected with a driving connecting rod, one end of the driving connecting rod is provided with a contact pin abutted with the second swing arm, and the second swing arm is used for switching on/off states on the switching-on/off indication plate.
  7. 7. The circuit breaker according to claim 1, wherein the contact mechanism comprises an arc extinguishing chamber, a moving guide rod and a static guide rod, the moving guide rod is provided with a moving contact at one end of the arc extinguishing chamber, the static guide rod is provided with a static contact at one end of the arc extinguishing chamber, the arc extinguishing chamber comprises axially laminated arc extinguishing grid sheets, an insulating cover is wrapped on the outer side of each arc extinguishing grid sheet, a through type current transformer is arranged at the other end of the moving guide rod, and the through type current transformer is provided with an insulating baffle.
  8. 8. The circuit breaker of claim 7, wherein the contact mechanism further comprises an interlocking assembly, the interlocking assembly comprises an interlocking piece and an interlocking spring, the interlocking spring is used for driving the interlocking piece to lock the moving contact in a state of being in contact with the fixed contact, the interlocking piece comprises an interlocking shaft, a third crank arm is fixed on the interlocking shaft, the end part of the third crank arm is connected with the moving guide rod through a connecting rod assembly, one end of the interlocking spring is connected with the partition plate, and the other end of the interlocking spring is connected with the connecting rod assembly.
  9. 9. The circuit breaker of claim 1, wherein the energy storage shaft is further provided with a third swing arm, the partition is provided with a micro switch, and the micro switch and the third swing arm are provided with contacts.
  10. 10. The circuit breaker according to claim 1, wherein a protection parameter setting panel and a display panel are installed above the base, and a circuit board to which the protection parameter setting panel and the display panel are connected is installed on the partition.

Description

Circuit breaker Technical Field The utility model relates to the field of low-voltage switch electricity, in particular to a circuit breaker. Background In an electric power system, as a key device for controlling and protecting a circuit, the performance of the circuit breaker is directly related to the safe and stable operation of the electric power system. Currently, most of the circuit breakers widely used in the market adopt a manual plate brake operation mode. The manual plate gate breaker realizes on-off control of a circuit mainly by manually pulling an operating handle. When the circuit is in fault and needs to be opened, the operator also needs to apply larger force to pull the operating handle to separate the contacts, so that the circuit is cut off. However, existing manual plate gate circuit breakers have significant drawbacks. On the one hand, a great force is needed to be used in operation, which is very difficult for some operators with smaller force, such as women or people with weaker physical power, and even can delay the control and protection of the circuit due to the fact that the operation cannot be timely and accurately performed, so that safety accidents are caused. On the other hand, the manual pulling brake breaker is frequently used for a long time, so that an operator is easy to fatigue, and the accuracy and the efficiency of operation are affected. In addition, in some special environments, such as occasions with small space or rapid operation, the manual brake pulling operation mode exposes inconvenience and limitation. In order to overcome the defect that the manual plate brake of the conventional circuit breaker (such as 400A-800A-specification circuit breaker) needs large external force for operation, the invention aims to provide the circuit breaker, and an operator can easily realize on-off control of a circuit without applying excessive force by improving an operating mechanism, so that the operation convenience and the use safety of the circuit breaker are improved, and the use requirements under different scenes are met. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides the circuit breaker which can easily realize the on-off control of the circuit without applying excessive force by operators and improves the operation convenience of the circuit breaker. In order to solve the technical problems, the circuit breaker adopts the following technical scheme that the circuit breaker comprises a base and three contact system cavities which are divided by a partition board side by side, and is characterized in that an energy storage mechanism, three contact mechanisms and a closing and opening mechanism for controlling the contact mechanisms to be connected or disconnected are arranged in the contact system cavities, wherein the closing and opening mechanism comprises a closing assembly and an opening assembly, the energy storage mechanism comprises an energy storage shaft and an energy storage spring, a first stop block matched with the closing assembly, a driving disc eccentrically arranged and matched with the contact mechanisms, an opening head matched with the opening assembly and the contact mechanisms, and a gear transmission assembly in transmission connection with the contact mechanisms are arranged on the energy storage shaft, a first crank arm connected with the energy storage spring is further arranged on the energy storage shaft, the other end of the energy storage spring is connected with the partition board, and the closing assembly, the opening assembly, the three contact mechanisms and the energy storage mechanism are in linkage. Further, the switch-on subassembly includes switch-on button, the level move first movable rod and connect in first restriction pole of first movable rod one end, the cover is equipped with first reset spring on the first restriction pole, is located and wears to be equipped with the first slider that can follow first restriction pole and remove between first reset spring and the first restriction pole, one side that first slider and first movable rod paste has a first removal guide surface, have the first spout of seting up along length direction on the first movable rod, the other end of first movable rod supports and leans on the latch hook, the latch hook upside rotationally installs on the baffle, the hook portion of latch hook supports and leans on first stop block. Still further, the brake subassembly includes brake button, second movable rod the one end of second movable rod is connected with the second restriction pole, the cover is equipped with second reset spring on the second restriction pole, is located to wear to be equipped with between second reset spring and the second restriction pole and can follow the second slider that the second restriction pole removed, one side that second slider and second movable rod paste has the second and removes the guide surface, second movab