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CN-122000252-A - Contact system and circuit breaker

CN122000252ACN 122000252 ACN122000252 ACN 122000252ACN-122000252-A

Abstract

The utility model provides a contact system and circuit breaker, includes button spare, handle mechanism, moving contact mechanism and the stationary contact that rectilinear movement set up, handle mechanism is including rotating the handle spare that sets up, be equipped with first connecting rod between button spare and the handle spare, the button spare drives the moving contact and the stationary contact and the separation of contact mechanism through the handle spare, moving contact mechanism has elastic mechanism, the handle spare is equipped with the second spout, first connecting rod is equipped with the second sliding part that inserts the second spout, the second spout has second combined floodgate end and the second brake end of relative setting, and elastic mechanism releases can and drives the moving contact and keep away from the stationary contact, and the second brake end of second spout is to keeping away from the direction slip of second sliding part, prevents that the handle spare from keeping away from the second sliding part when the stationary contact, does not need the button spare to be moved to the brake position entirely, makes brake separation action just begin just before the button spare moves to the place, and brake separation process is realized under the drive of the elastic mechanism of moving contact mechanism.

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 utility model provides a contact system, includes button spare (6), handle mechanism (1), moving contact mechanism (2) and stationary contact (3) that linear movement set up, handle mechanism (1) are including rotating handle spare (11) that set up, be equipped with first connecting rod (7) between button spare (6) and handle spare (11), handle spare (11) are connected with moving contact mechanism (2) through second connecting rod (8), and button spare (6) drive moving contact (22) and stationary contact (3) contact and the separation of contact mechanism (2) through handle spare (11), its characterized in that: 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).
  2. 2. The contact system according to claim 1, 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) and is used for driving the contact mechanism (2) to be contacted with the fixed contact (3), and the button member (6) drives the first opening end (63) to push the first sliding part (71) and is used for driving 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).
  3. 3. The contact system according to claim 2, wherein the button member (6) is provided with a limiting boss (64) for limiting the first link (7), the limiting boss (64) is located at one side of the extension line of the first sliding groove (61), and when the handle member (11) pushes the first sliding portion (71) of the first link (7) to slide along the first sliding groove (61) near the first closing end (62), the limiting boss (64) blocks the first link (7) from rotating, so that the first link (7) moves linearly along a direction parallel to the length of the first sliding groove (61).
  4. 4. The contact system according to claim 1, wherein the movable contact mechanism (2) comprises a contact support (21) and a lock catch (24) and a jump button (25) which are respectively rotatably arranged on the contact support (21), the contact support (21) is connected with a mechanism spring (26), the handle member (11) is rotatably connected with the jump button (25) through a second connecting rod (8), the second connecting rod (8) can drive the jump button (25) to rotate relative to the contact support (21), the lock catch (24) is used for locking the jump button (25), the jump button (25) cannot rotate relative to the contact support (21), and the second connecting rod (8) can drive the contact support (21) of the contact (22) to rotate through the jump button (25), and the mechanism spring (26) serves as the elastic mechanism.
  5. 5. The contact system according to claim 4, wherein the line between the rotation center of the handle member (11) and the rotation center of the jump button (25) is a critical position of the second link (8), and when the handle member (11) drives the second link (8) to rotate toward the critical position, one end of the second link (8) connected to the handle member (11) moves near the line between the rotation center of the handle member (11) and the rotation center of the jump button (25), and one end of the second link (8) connected to the handle member (11) moves beyond the line between the rotation center of the handle member (11) and the rotation center of the jump button (25), the second link (8) moves beyond the critical position.
  6. 6. The contact system according to claim 4, wherein the contact support (21) comprises a flat-plate-type support plate (212), and a support rotation part (213) provided on the support plate (212), the support rotation part (213) is rotatably connected with the housing assembly (4), and a trip shaft (73) for mounting the trip button (25) is provided on the support plate (212), and the trip shaft (73) is a rotation center of the trip button (25).
  7. 7. The contact system according to claim 6, wherein the trip shaft (73) and the unlocking shaft (211) are disposed on both side surfaces of the support plate (212) opposite to each other in the axial direction of the support rotation portion (213), and the trip shaft (73) and the unlocking shaft (211) are disposed on both sides of the support rotation portion (213) opposite to each other in the radial direction of the rotation portion.
  8. 8. The contact system according to claim 1, wherein the handle member (11) comprises a handle rotating portion (114) and a handle swinging portion (115) arranged on the handle rotating portion (114) in the radial direction, the handle rotating portion (114) is the rotation center of the handle member (11), the handle swinging portion (115) is provided with a second sliding groove (111) and a first connecting hole (116), the first connecting rod (7) is provided with a second sliding portion (72) which is inserted into the second sliding groove (111) in a sliding fit manner, and the second connecting rod (8) is provided with a first connecting portion (81) which is inserted into the first connecting hole (116) in a rotating connection manner.
  9. 9. The contact system according to claim 1, wherein the movable contact (22) comprises a contact rotating portion (220), and a contact supporting portion (222) and a contact energy storage portion (223) which are oppositely arranged at two sides of the contact rotating portion (220), the contact rotating portion (220) is a rotation center of the movable contact (22), and the contact supporting portion (222) is provided with a movable contact.
  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 button piece, a handle mechanism, a moving contact mechanism and a fixed contact, wherein the button piece, the handle mechanism, the moving contact mechanism and the fixed contact are arranged in a linear movement way, the handle mechanism comprises a handle piece which is arranged in a rotating way, a first connecting rod is arranged between the button piece and the handle piece, the handle piece is connected with the moving contact mechanism through a second connecting rod, the button piece drives the moving contact of the contact mechanism to contact with and separate from the fixed contact through the handle piece, The movable contact mechanism is provided with an elastic mechanism, the handle piece is provided with a second chute, the first connecting rod is provided with a second sliding part inserted into the second chute, the second chute is provided with a second closing end and a second opening end which are oppositely arranged, the second sliding part can slide between the second closing end and the second opening end along the second chute, the second sliding part drives the movable contact to contact with the fixed contact through a second connecting rod when driving the handle piece to rotate by pushing the second closing end, the second sliding part drives the movable contact to separate from the fixed contact through the second connecting rod when driving the handle piece to rotate by pushing the second opening end, The button piece can drive the second sliding part of the first connecting rod to push the second separating brake end, so that the handle piece drives the second connecting rod to rotate towards the critical position, meanwhile, the elastic mechanism of the moving contact mechanism stores energy, the elastic mechanism is released when the second connecting rod passes over the critical position, the elastic mechanism releases energy and drives the moving contact to be far away from the fixed contact, and meanwhile, the second separating brake end of the second sliding groove slides towards the direction far away from the second sliding part, so that the handle piece is prevented from blocking the second sliding part when the moving contact is far away from the fixed contact. Preferably, the button piece is provided with a first chute, the first chute is provided with a first closing end and a first opening end which are oppositely arranged, the first connecting rod is provided with a first sliding part which is used for being inserted into the first chute, the first sliding part can slide between the first closing end and the first opening end along the first chute, the first closing end is arranged at one side of the first sliding part far away from the handle piece, when the button piece drives the first closing end to push the first sliding part, the button piece is used for driving the contact mechanism to contact with the fixed contact, and when the button piece drives the first opening end to push the first sliding part, the button piece is used for driving the moving contact mechanism to be separated from the fixed contact; When the moving contact is far away from the fixed contact, the elastic mechanism drives the handle piece to rotate and drives the second closing end of the second sliding groove to push the second sliding part of the first connecting rod, so that the first sliding part of the firs