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CN-122000249-A - Operating mechanism and switching device

CN122000249ACN 122000249 ACN122000249 ACN 122000249ACN-122000249-A

Abstract

The invention relates to the field of low-voltage appliances, in particular to an operating mechanism and a switching device comprising the operating mechanism, wherein one end of a locking piece is rotatably arranged, the other end of the locking piece is provided with a locking piece matching part, a matching piece is arranged on a traction rod and synchronously rotates around the rotation axis of the traction rod with the traction rod, the locking piece is in snap fit with the locking piece under the normal state, the first limit fit is kept between the locking piece matching part and the matching piece, the traction rod is driven by release external force to rotate, the first limit fit is released by driving the matching piece and the locking piece matching part, the locking piece rotates under the action of a main spring, the locking piece is driven by the locking piece to rotate, the locking piece and the locking piece matching part are released from the snap fit, and a second limit fit is established between the locking piece matching part and the matching piece, and the operating mechanism and the switching device are simpler in structure.

Inventors

  • YANG PINGSHUANG
  • WEI SHANGJING
  • HU GANG
  • Li Lvlv
  • XU YONGFU

Assignees

  • 浙江正泰电器股份有限公司

Dates

Publication Date
20260508
Application Date
20241105

Claims (10)

  1. 1. The operating mechanism comprises a bracket (100), a locking piece (500) and a rocker arm part (700) which are respectively arranged on the bracket (100) in a rotating mode, a jump buckle (600) which is arranged on the bracket (100) in a rotating mode and is matched with the locking piece (500) at the other end, an upper connecting rod (810) which is connected with the middle of the jump buckle (600) in a rotating mode and is provided with a second shaft (820) at the other end, a main spring (850) which is connected to the rocker arm part (700) in one end and is connected to the second shaft (820) at the other end, and a traction rod (200) which is arranged in a rotating mode, wherein the second shaft (820) is further connected with a moving contact assembly (910) of a switching device in a transmission mode, and the main spring (850) provides energy for switching-off, switching-on and tripping operation of the operating mechanism, and is characterized in that: The operating mechanism further comprises a matching piece (300) which is arranged on the traction rod (200) and synchronously rotates with the traction rod (200) around the rotation axis of the traction rod (200); one end of the lock catch piece (500) is rotatably arranged, and the other end of the lock catch piece is provided with a lock catch piece matching part (540); The operating mechanism is in a normal state, the jump fastener (600) is in snap fit with the lock catch piece (500), and a first limit fit is kept between the lock catch piece matching part (540) and the matching piece (300); The traction rod (200) is driven by release external force to rotate, the driving matching piece (300) and the locking piece matching part (540) are released from first limit matching, then the locking piece (600) rotates under the action of the main spring (850) and the locking piece (600) drives the locking piece (500) to rotate, so that the locking piece (600) and the locking piece (500) are released from snap matching, and a second limit matching is established between the locking piece matching part (540) and the matching piece (300).
  2. 2. The operating mechanism according to claim 1, wherein the engaging member (300) is located on the engaging portion (540) side of the latch member in a direction d3 in a normal state of the operating mechanism, the engaging member (300) is located on the engaging portion (540) side of the latch member in a direction d4 in a released state of the operating mechanism, and the direction d3 and the direction d4 are perpendicular to each other.
  3. 3. The operating mechanism according to claim 2, wherein the engaging member (300) is a cylindrical rod disposed parallel to a rotation axis of the traction rod (200), the rotation axes of the latch member (500) and the traction rod (200) are parallel to a direction d5, the direction d3, the direction d4 and the direction d5 are perpendicular to each other, the latch member engaging portion (540) includes an engaging portion first limit surface (541) and an engaging portion second limit surface (542), the cylindrical rod abuts against the engaging portion first limit surface (541) along the direction d3 to establish a first limit engagement between the latch member engaging portion (540) and the engaging member (300), and the cylindrical rod abuts against the engaging portion second limit surface (542) along the direction d4 to establish a second limit engagement between the latch member engaging portion (540) and the engaging member (300).
  4. 4. The operating mechanism according to claim 3, wherein the traction rod (200) comprises a traction rod main body (210) and matching piece mounting parts (220), the traction rod (200) is rotatably arranged through the traction rod main body (210), the two matching piece mounting parts (220) are oppositely arranged at intervals along the rotation axis of the traction rod (200) and are arranged on the traction rod main body (210), two ends of a cylindrical rod are fixedly arranged on the two matching piece mounting parts (220), the cylindrical rod is a cylindrical rod, the traction rod main body (210) comprises two groups of traction rod assembly holes (211) which are sequentially arranged along the rotation axis of the traction rod (200), the support (100) comprises two support side plates (110) which are oppositely arranged, each support side plate (110) is provided with a traction rod mounting part (116), and the two traction rod mounting parts (116) are respectively inserted into the two groups of traction rod assembly holes (211) and are respectively connected with the traction rod main body (210) in a rotating mode.
  5. 5. The actuator according to claim 3, wherein the axis of the mating member (300), the axis of rotation of the locking member (500) and the axis of rotation of the traction lever (200) are located at three vertices of a triangle, respectively, on a projection of the actuator perpendicular to the direction d 5.
  6. 6. The operating mechanism as set forth in claim 1, wherein the latch member (500) comprises a latch main plate (510) and latch member mounting arms (520), the latch main plate (510) is adapted to be snap-fitted with the latch member (600), a pair of side edges of the latch main plate (510) are respectively bent and connected with the two sets of latch member mounting arms (520), the two sets of latch member mounting arms (520) are oppositely disposed along a rotation axis of the latch member (500), one ends of the two sets of latch member mounting arms (520) are respectively rotatably disposed on the bracket (100), and the other end of at least one latch member mounting arm (520) serves as a latch member fitting portion (540).
  7. 7. The operating mechanism as claimed in claim 6, wherein the two sets of latch mounting arms (520) are rotatably provided at one end of each of the brackets (100) and at the other end thereof as latch engaging portions (540).
  8. 8. The operating mechanism as set forth in claim 1, wherein the snap-fit member (600) is permanently in positive engagement with the snap-fit member (500).
  9. 9. The operating mechanism as set forth in claim 8, wherein the latch (600) and one end of the latch main board (510) of the latch (500) are main board mating ends (511), and the latch (600) and the main board mating ends (511) are always abutted against each other; the jump fastener (600) comprises a jump fastener hasp surface (610) and a jump fastener matching surface (620) which are connected in a bending way; The operation mechanism is in a normal state, the snap fastener surface (610) is propped against the main board matching end (511), and the snap fastener matching surface (620) is propped against the main board matching end (511) in a release state; The mating surface (620) of the jump fastener is an arc surface, and the circle center of the mating surface is coincident with the rotation center of the jump fastener (600); The distance between the hook face (610) of the hook and loop fastener from the far end of the hook face to the near end of the hook face of the hook and loop fastener and the rotation axis of the hook and loop fastener (600) is gradually increased; The operating mechanism further comprises a reset structure (400), and the locking piece (500) and the traction rod (200) have a tendency to rotate along the same direction under the action of the reset structure (400); The operating mechanism further comprises a lock catch rotating shaft (550), wherein the lock catch piece (500) is rotatably arranged on the bracket (100) through the lock catch rotating shaft (550), the reset structure (400) is a reset torsion spring, the reset torsion spring is sleeved on the lock catch rotating shaft (550), one group of spring arms are matched with the lock catch piece (500), and the other group of spring arms are matched with the traction rod (200); The operating mechanism further comprises a lower connecting rod (860), one end of the lower connecting rod (860) is hinged with the upper connecting rod (810) through a second shaft (820), and the other end of the lower connecting rod is in transmission connection with a moving contact assembly (910) of the switching device; The second shaft (820) is in limit fit with the jump fastener (600) to prevent the upper connecting rod (810) from rotating relative to the jump fastener (600) along the direction d2 under the mechanism opening state and the mechanism releasing state; The second shaft (820) is further used for driving the moving contact assembly (910) to rotate to a moving contact opening position when the operating mechanism is switched from a mechanism closing state to a mechanism opening state, so that the opening distance between the moving contact assembly (910) and the corresponding fixed contact (920) is L1; The second shaft (820) is further used for driving the moving contact assembly (910) to rotate to a moving contact trip position when the operating mechanism is switched from a mechanism closing state to a mechanism tripping state, so that the opening distance between the moving contact assembly (910) and the corresponding fixed contact (920) is L2; The jump fastener (600) further comprises a jump fastener limiting surface (630), and the second shaft (820) abuts against the jump fastener limiting surface (630) to prevent the upper connecting rod (810) from rotating relative to the jump fastener (600) along the direction d2 when the operating mechanism is in a mechanism opening state and a mechanism releasing state; The jump fastener (600) comprises a jump fastener hasp surface (610), a jump fastener matching surface (620) and a jump fastener limiting surface (630) which are sequentially connected; When the operating mechanism is rebuckled, an external force drives the jump buckle part (600) to rotate along the direction d1 through the rocker arm part (700) to reset, the latch part (500) and the traction rod (200) rotate respectively to reset, the second limit fit is released from the fit part (300) and the latch part (500) to establish the first limit fit, the jump buckle part (600) and the latch part (500) are restored and kept in the snap fit, and the direction d1 and the direction d2 are opposite to each other.
  10. 10. A switching device, characterized in that it comprises an operating mechanism according to any one of claims 1 to 9.

Description

Operating mechanism and switching device Technical Field The invention relates to the field of piezoelectric devices, in particular to an operating mechanism and a switching device comprising the operating mechanism. Background The existing molded case circuit breaker comprises an operating mechanism and a contact system, wherein the contact system comprises a moving contact assembly and a fixed contact which are matched for use, the operating mechanism drives the moving contact assembly to rotate so as to be closed and opened with the fixed contact, and the operating mechanism generally comprises a bracket, a traction rod, a locking piece, a jump piece, a re-locking piece, a main spring, a rocker arm part, an upper connecting rod, a lower connecting rod and the like, and at least the following defects exist in the operating mechanism: 1. the switching of the operating mechanism between the four connecting rods and the five connecting rods can be realized only by matching the parts such as the locking part, the jump part, the re-locking part and the like, and the four-connecting-rod type electric motor has the advantages of complex structure, more parts, complex assembly and insufficient service life. 2. When the existing molded case circuit breaker is normally opened and closed, the opening distance between the movable contact assembly and the fixed contact is the same, if the opening distance is larger, the breaking capacity is improved, but the action strokes of the upper connecting rod, the lower connecting rod and the main spring are large, the mechanical service life of a product is influenced, and if the opening distance is smaller, the mechanical service life of the product is ensured, but the breaking capacity of the product is limited. Disclosure of Invention The invention aims to overcome at least one defect of the prior art, and provides an operating mechanism and a switching apparatus comprising the operating mechanism, which are simpler in structure. In order to achieve the above purpose, the invention adopts the following technical scheme: The operating mechanism comprises a bracket, a latch piece and a rocker arm part which are respectively arranged on the bracket in a rotating way, a latch piece, an upper connecting rod and a main spring, wherein one end of the latch piece is arranged on the bracket in a rotating way, the other end of the latch piece is matched with the latch piece, one end of the upper connecting rod is connected with the middle part of the latch piece in a rotating way, the other end of the upper connecting rod is provided with a second shaft, one end of the main connecting rod is connected to the rocker arm part, the other end of the main connecting rod is connected to the second shaft, and the traction rod is arranged in a rotating way; the operating mechanism further comprises a matching piece which is arranged on the traction rod and synchronously rotates with the traction rod around the rotation axis of the traction rod; one end of the locking piece is rotatably arranged, and the other end of the locking piece is provided with a locking piece matching part; the operating mechanism is in a normal state, the jump fastener and the lock fastener are in snap fit, and a first limit fit is kept between the matching part of the lock fastener and the matching piece; The traction rod is driven by release external force to rotate, the first limit fit is released by the drive fit piece and the lock catch piece fit part, then the jump fastener rotates under the action of the main spring and drives the lock catch piece to rotate, so that the jump fastener and the lock catch piece are released from the snap fit, and a second limit fit is established between the lock catch piece fit part and the fit piece. Further, the matching piece is located at one side of the matching part of the locking piece along the direction d3 in a normal state of the operating mechanism, the matching piece 300 is located at one side of the matching part of the locking piece along the direction d4 in a release state of the operating mechanism, and the direction d3 and the direction d4 are mutually perpendicular. The locking piece matching part comprises a first limiting surface of the matching part and a second limiting surface of the matching part, the cylindrical rod is propped against the first limiting surface of the matching part along the direction d3 to enable the locking piece matching part to establish first limiting matching with the matching piece, and the cylindrical rod is propped against the second limiting surface of the matching part along the direction d4 to enable the locking piece matching part to establish second limiting matching with the matching piece. The traction rod comprises a traction rod main body and matched piece installation parts, wherein the traction rod is arranged in a rotating mode through the traction rod main body, the two matched piece installation parts are arranged