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CN-122000251-A - Contact system and circuit breaker

CN122000251ACN 122000251 ACN122000251 ACN 122000251ACN-122000251-A

Abstract

The contact system comprises a handle mechanism, a moving contact mechanism, a fixed contact and an energy storage mechanism, wherein the moving contact mechanism comprises a contact support rotatably arranged in a shell assembly and a moving contact rotatably arranged on the contact support, the moving contact is connected with the contact support through an energy storage spring, the moving contact is provided with a locking shaft, the contact support is provided with an unlocking shaft, the energy storage mechanism comprises an energy storage part rotatably arranged, the energy storage part is used for blocking the locking shaft of the moving contact to keep the moving contact at an energy storage position in the process that the moving contact is driven by the handle mechanism to be close to the fixed contact, the contact support is continuously rotated relative to the moving contact, the energy storage spring is used for storing energy until the unlocking shaft supported by the contact moves to the unlocking position to push the energy storage part to rotate, the energy storage part unlocks the locking shaft, and the energy storage spring can be used for driving the moving contact to rotate to a closing position contacted with the fixed contact, so that arcing problems caused by too slow closing speed can be avoided.

Inventors

  • LIU JIN
  • WANG PENG
  • ZHU JUN
  • SI YINGGE

Assignees

  • 浙江正泰电器股份有限公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (10)

  1. 1. The contact system comprises a handle mechanism (1), a moving contact mechanism (2) and a fixed contact (3), wherein the handle mechanism (1) is used for driving a moving contact (22) of the contact mechanism (2) to contact with and separate from the fixed contact (3), and is characterized by further comprising an energy storage mechanism (5), the moving contact mechanism (2) comprises a contact support (21) rotatably arranged in a shell assembly (4) and a moving contact (22) rotatably arranged on the contact support (21), the moving contact (22) is connected with the contact support (21) through an energy storage spring (23), the moving contact (22) is provided with a locking shaft (221), the contact support (21) is provided with an unlocking shaft (211), and the energy storage mechanism (5) comprises an energy storage piece (51) rotatably arranged; In the process that the contact support (21) drives the moving contact (22) to be close to the fixed contact (3) under the driving of the handle mechanism (1), the energy storage piece (51) blocks the locking shaft (221) of the moving contact (22) to enable the moving contact (22) to be kept at an energy storage position, the contact support (21) continues to rotate relative to the moving contact (22) and enables the energy storage spring (23) to store energy until the unlocking shaft (211) of the contact support (21) moves to the unlocking position to push the energy storage piece (51) to rotate, the energy storage piece (51) is enabled to unlock the locking shaft (221), and the energy storage spring (23) releases energy to drive the moving contact (22) to rotate to a closing position in contact with the fixed contact (3).
  2. 2. The contact system according to claim 1, wherein the energy storage member (51) comprises an energy storage supporting portion (511), and an energy storage rotating portion (512) arranged on the side surface of the energy storage supporting portion (511), the energy storage rotating portion (512) is a rotation center of the energy storage member (51), the energy storage supporting portion (511) is provided with an energy storage sliding groove (513), the locking shaft (221) can slide in the energy storage sliding groove (513), and a protruding energy storage boss (514) is arranged on the side wall of the energy storage sliding groove (513) and used for blocking the locking shaft (221) to keep the movable contact (22) in an energy storage position.
  3. 3. The contact system according to claim 2, wherein the energy storage mechanism (5) further comprises a return spring (52) connected with the energy storage piece (51), the return spring (52) is used for driving the side wall of the energy storage chute (513) to be in contact limit with the locking shaft (221) when the energy storage boss (514) is not in contact with the locking shaft (221), or a boss structure for limiting the energy storage piece (51) is arranged on the outer side of the energy storage piece (51), and the return spring (52) is used for driving the outer side of the energy storage piece (51) to be in contact limit with the boss structure when the energy storage boss (514) is not in contact with the locking shaft (221).
  4. 4. A contact system according to claim 3, wherein the return spring (52) is a torsion spring, the middle part of the return spring (52) is sleeved on the energy storage rotating part (512), two ends of the return spring (52) are respectively connected with the energy storage supporting part (511) and the shell component (4), and the energy storage supporting part (511) is provided with a spring hole (515) for inserting the end part of the return spring (52).
  5. 5. The contact system according to claim 1, wherein the movable contact (22) comprises a contact rotating part (220), a contact supporting part (222) and a contact energy storage part (223) which are oppositely arranged at two sides of the contact rotating part (220), the contact rotating part (220) is a rotating center of the movable contact (22), the contact supporting part (222) is provided with the movable contact, and a contact locking part (225) which is protruded perpendicular to the axis direction of the contact rotating part (220), and the locking shaft (221) is arranged at the side surface of the contact locking part (225) in parallel to the axis direction of the contact rotating part (220).
  6. 6. The contact system according to claim 5, wherein the energy storage spring (23) is a torsion spring, the middle part of the energy storage spring (23) is sleeved on the supporting rotating part (213) of the contact support (21), and two ends of the energy storage spring (23) are respectively in contact connection with the contact support (21) and the contact energy storage part (223).
  7. 7. The contact system according to claim 6, wherein the contact energy storage portion (223) is provided with a limit claw (224) for limiting an end portion of the energy storage spring (23).
  8. 8. The contact system according to claim 1, characterized in that the contact system comprises a linearly movable button part (6), the handle mechanism (1) comprises a rotatably arranged handle part (11), and a first connecting rod (7) arranged between the button part (6) and the handle part (11), the handle part (11) is connected with the movable contact mechanism (2) through a second connecting rod (8), The movable contact mechanism (2) is provided with an elastic mechanism, the handle piece (11) is provided with a second sliding groove (111), the first connecting rod (7) is provided with a second sliding part (72) inserted into the second sliding groove (111), the second sliding groove (111) is provided with a second closing end (113) and a second opening end (112) which are oppositely arranged, the second sliding part (72) can slide between the second closing end (113) and the second opening end (112) along the second sliding groove (111), the second sliding part (72) drives the movable contact (22) to be in contact with the fixed contact (3) through a second connecting rod (8) when the second closing end (113) is driven to rotate, the second sliding part (72) drives the movable contact (22) to be separated from the fixed contact (3) through the second connecting rod (8) when the second sliding part (72) drives the handle piece (11) to rotate, The button piece (6) can drive the second sliding part (72) of the first connecting rod (7) to push the second separating brake end (112), so that the handle piece (11) drives the second connecting rod (8) to rotate towards the critical position, and meanwhile, energy is stored for the elastic mechanism of the moving contact mechanism (2), when the second connecting rod (8) passes over the critical position, the elastic mechanism is released, the elastic mechanism releases energy and drives the moving contact (22) to be far away from the fixed contact (3), and meanwhile, the second separating brake end (112) of the second sliding groove (111) slides towards the direction far away from the second sliding part (72), and the handle piece (11) is prevented from blocking the second sliding part (72) when the moving contact (22) is far away from the fixed contact (3).
  9. 9. The contact system according to claim 8, wherein the button member (6) is provided with a first sliding groove (61), the first sliding groove (61) is provided with a first closing end (62) and a first opening end (63) which are oppositely arranged, the first connecting rod (7) is provided with a first sliding part (71) which is used for being inserted into the first sliding groove (61), the first sliding part (71) can slide along the first sliding groove (61) between the first closing end (62) and the first opening end (63), the first closing end (62) is arranged on one side of the first sliding part (71) far away from the handle member (11), the button member (6) drives the first closing end (62) to push the first sliding part (71) so as to drive the contact mechanism (2) to be in contact with the fixed contact (3), and the button member (6) drives the first opening end (63) to push the first sliding part (71) so as to drive the moving mechanism (2) to be separated from the fixed contact (3); When the moving contact (22) is far away from the fixed contact (3), the elastic mechanism drives the handle piece (11) to rotate and drives the second closing end (113) of the second sliding groove (111) to push the second sliding part (72) of the first connecting rod (7), so that the first sliding part (71) of the first connecting rod (7) slides along the first sliding groove (61) far away from the second closing end (63), and the button piece (6) is prevented from blocking the first sliding part (71) when the moving contact (22) is far away from the fixed contact (3).
  10. 10. A circuit breaker, characterized by comprising a housing assembly (4) and a contact system according to any of claims 1-9.

Description

Contact system and circuit breaker Technical Field The invention relates to the field of piezoelectric devices, in particular to a contact system and a circuit breaker. Background The low-voltage circuit breaker is used as an important protection device in the field of low-voltage power transmission and distribution, and the main performances of the low-voltage circuit breaker, such as breaking capacity, temperature rise, electric life and the like, are closely related to the performances of the internal moving contact and the static contact and the contact states of the moving contact and the static contact. In the existing loaded circuit breaker, in the process of switching on to effective contact and in the process of switching off to the maximum space between a moving contact and a fixed contact, electric arcs are generated between the moving contact and the fixed contact, the moving contact and the fixed contact are burnt, the service life of a product is reduced, if the loaded current is larger or the moving contact moves at a slower speed, the burning loss is more serious, the service life of the product is shorter, and for the multipole circuit breaker, the damage of unbalanced phase line load and equipment open-phase operation caused by serious burning loss of a certain pole contact group also exists. Disclosure of Invention The object of the invention is to overcome at least one of the drawbacks of the prior art and to provide a contact system. In order to achieve the above purpose, the invention adopts the following technical scheme: The contact system comprises a handle mechanism, a moving contact mechanism and a fixed contact, wherein the handle mechanism is used for driving the moving contact of the contact mechanism to contact with and separate from the fixed contact, the contact system further comprises an energy storage mechanism, the moving contact mechanism comprises a contact support rotatably arranged in a shell assembly and a moving contact rotatably arranged on the contact support, the moving contact is connected with the contact support through an energy storage spring, the moving contact is provided with a locking shaft, the contact support is provided with an unlocking shaft, and the energy storage mechanism comprises an energy storage piece rotatably arranged; The contact support is driven by the handle mechanism to drive the moving contact to be close to the fixed contact, the energy storage piece blocks the locking shaft of the moving contact to enable the moving contact to be kept at an energy storage position, the contact support continues to rotate relative to the moving contact and enables the energy storage spring to store energy until the unlocking shaft supported by the contact moves to the unlocking position to push the energy storage piece to rotate, the energy storage piece unlocks the locking shaft, and the energy storage spring releases energy to drive the moving contact to rotate to a closing position in contact with the fixed contact. Preferably, the energy storage piece comprises an energy storage supporting part and an energy storage rotating part arranged on the side face of the energy storage supporting part, the energy storage rotating part is a rotating center of the energy storage piece, the energy storage supporting part is provided with an energy storage sliding groove, the locking shaft can slide in the energy storage sliding groove, and a convex energy storage boss is arranged on the side wall of the energy storage sliding groove and used for blocking the locking shaft to enable the moving contact to be kept at an energy storage position. Preferably, the energy storage mechanism further comprises a reset spring connected with the energy storage piece, when the energy storage boss is not in contact with the locking shaft, the reset spring is used for driving the side wall of the energy storage chute to be in contact with the locking shaft for limiting, or a boss structure for limiting the energy storage piece is arranged on the outer side of the energy storage piece, and when the energy storage boss is not in contact with the locking shaft, the reset spring is used for driving the outer side of the energy storage piece to be in contact with the boss structure for limiting. Preferably, the reset spring is a torsion spring, the middle part of the reset spring is sleeved on the energy storage rotating part, two ends of the reset spring are respectively connected with the energy storage supporting part and the shell component, and the energy storage supporting part is provided with a spring hole for inserting the end part of the reset spring. Preferably, the moving contact comprises a contact rotating part, a contact supporting part and a contact energy storage part, wherein the contact supporting part and the contact energy storage part are oppositely arranged at two sides of the contact rotating part, the contact rotating part is a rotating center of the mo