CN114678237B - Pin shaft for circuit breaker, arc extinguishing chamber using pin shaft and circuit breaker - Google Patents
Pin shaft for circuit breaker, arc extinguishing chamber using pin shaft and circuit breaker Download PDFInfo
- Publication number
- CN114678237B CN114678237B CN202210195382.2A CN202210195382A CN114678237B CN 114678237 B CN114678237 B CN 114678237B CN 202210195382 A CN202210195382 A CN 202210195382A CN 114678237 B CN114678237 B CN 114678237B
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- pin shaft
- main body
- pin
- falling
- circuit breaker
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 75
- 238000000034 method Methods 0.000 claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 29
- 230000009471 action Effects 0.000 claims abstract description 26
- 230000002093 peripheral effect Effects 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 12
- 230000009286 beneficial effect Effects 0.000 description 27
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
Landscapes
- Breakers (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
The invention relates to a circuit breaker, in particular to pin shaft connection of parts in the circuit breaker, and provides a pin shaft for the circuit breaker, an arc extinguishing chamber using the pin shaft and the circuit breaker. The pin shaft for the circuit breaker comprises a pin shaft main body and an anti-falling elastic piece, wherein one end of the pin shaft main body is a penetrating end, and the other end of the pin shaft main body is a head; the anti-falling elastic sheet is provided with a fixed end and an elastic deflection part, and the fixed end is fixedly connected to the penetrating end of the pin shaft main body; when the anti-falling elastic sheet is in a natural state, the elastic deflection part protrudes out of the outer peripheral surface of the pin shaft main body and is used for being in stop fit with a piece to be connected along the axial direction of the pin shaft main body so as to prevent the pin shaft from falling out of the pin shaft hole; the elastic deflection part is used for swinging under the counter-pushing action of the opening edge of the pin shaft hole to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole in the process of inserting and separating the pin shaft into and from the pin shaft hole. The invention can solve the problem that the existing pin shaft is inconvenient to apply in occasions with narrow space in the circuit breaker.
Description
Technical Field
The invention relates to a circuit breaker, in particular to pin shaft connection of parts in the circuit breaker.
Background
The pin shaft connection can realize static fixation between different parts, and can be used for the hinge joint of two parts to form a revolute pair with a connected piece to form hinge connection. At present, the pin shaft connection is basically formed by using a pin shaft to be matched with a cotter pin or a circlip (namely a clamp spring), and when the pin shaft is specifically installed, the pin shaft is inserted from one side of a pin shaft hole, and the cotter pin or the circlip is installed at the other side of the pin shaft hole. More parts in the circuit breaker can adopt the connecting rod transmission, and corresponding connecting rod can conveniently be dismantled and assembled through round pin axle connection structure, therefore the application of round pin axle is very extensive. For example, in an arc extinguishing chamber of a circuit breaker, a movable end insulating pull rod and a guide rod which is guided and assembled on a movable end cover are connected through a pin shaft; for another example, an outer crank arm on a crank arm box at the moving end of the arc extinguish chamber in the circuit breaker is connected with a corresponding connecting rod through a pin shaft.
However, both the cotter pin and the circlip are assembled and disassembled, a certain tool is needed, and a certain requirement on the operation space is met. Therefore, in some occasions with narrow space, the pin shaft is inconvenient to connect and disassemble, or the structure of the connecting part needs to be modified, so that the application of the pin shaft is limited. For example, in the arc-extinguishing chamber, the connection part of the movable end insulating pull rod and the guide rod on the movable end cover is positioned in the supporting cylinder supported between the movable end cover and the movable end assembly, the outer peripheral surface of the supporting cylinder is provided with an operation hole for a tool to extend into the supporting cylinder to carry out pin shaft dismounting operation, so that the operation is very inconvenient, if the diameter of the supporting cylinder is increased to enlarge the operation space, a certain interval is needed between the supporting cylinder and the arc-extinguishing chamber cylinder to meet the insulation requirement, and the diameter of the arc-extinguishing chamber cylinder is also required to be increased simultaneously. In addition, the existing pin shaft connecting structure is low in installation efficiency due to the fact that cotter pins or circlips are required to be installed.
Disclosure of Invention
The invention aims to provide a pin shaft for a circuit breaker, an arc extinguishing chamber using the pin shaft and the circuit breaker, and solves the problem that the existing pin shaft is inconvenient to apply in occasions with narrow space in the circuit breaker due to the fact that cotter pins or circlips are required to be installed.
The invention adopts the following technical scheme:
The pin shaft for the circuit breaker is used for being arranged in a pin shaft hole on a to-be-connected piece in a penetrating mode and comprises a pin shaft main body, wherein one end of the pin shaft main body is a penetrating end used for penetrating out of the to-be-connected piece when in use, and the other end of the pin shaft main body is a head; the pin shaft for the circuit breaker further comprises an anti-falling elastic piece, the anti-falling elastic piece is provided with a fixed end and an elastic deflection part, and the fixed end is fixedly connected to the penetrating-out end of the pin shaft main body; when the anti-falling elastic sheet is in a natural state, the elastic deflection part protrudes out of the outer peripheral surface of the pin shaft main body and is used for being in stop fit with a piece to be connected along the axial direction of the pin shaft main body so as to prevent the pin shaft from falling out of the pin shaft hole;
The elastic deflection part is used for swinging towards the head of the pin shaft main body under the reverse pushing action of the pin shaft inserting side opening edge of the pin shaft hole in the process of inserting the pin shaft into the pin shaft hole so as to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole; the pin shaft is also used for swinging towards the penetrating end of the pin shaft main body under the reverse pushing action of the pin shaft penetrating side opening edge of the pin shaft hole in the process of separating the pin shaft from the pin shaft hole so as to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole;
The outer peripheral surface of the penetrating end is provided with a groove for accommodating the anti-falling elastic sheet, and the anti-falling elastic sheet is fixed on the bottom wall of the groove; the anti-falling elastic sheet comprises a supporting part, a overhanging part and a supporting part, wherein the bottom surface of the supporting part is supported on the bottom wall of the groove, the overhanging part is arranged at one end of the supporting part, which is close to the head part of the pin shaft main body, the overhanging part bends towards the radial outer side of the pin shaft main body relative to the supporting part, and the tail end of the overhanging part protrudes out of the outer circumferential surface of the pin shaft main body; the elastic deflection portion is formed by an overhanging portion.
The beneficial effects are that: according to the technical scheme, the anti-falling elastic sheet arranged at the penetrating end of the pin shaft main body can protrude out of the outer peripheral surface of the pin shaft main body in a natural state, so that the pin shaft is limited, the pin shaft is prevented from falling out of the pin shaft hole on a to-be-connected piece, meanwhile, the elastic deflection part can deflect elastically, in the process of assembling and disassembling the pin shaft, the elastic deflection part can swing to the cylindrical surface range corresponding to the cross section of the pin shaft hole under the action of the corresponding side opening edge of the pin shaft hole, so that the assembling and disassembling of the pin shaft can be realized from the pin shaft inserting side of the pin shaft hole. The groove can provide deflection space for the elastic deflection part, the overhanging length of the elastic deflection part is also convenient to adjust through the depth of the groove, the deformation difficulty degree of the anti-falling elastic sheet is controlled, the anti-falling elastic sheet is convenient to install and fix, the structure is simple, the processing is convenient, and the deflection deformation of the anti-falling elastic sheet is also convenient when the pin shaft is installed.
Further: and a space is arranged between the fixed part between the supporting part and the pin shaft main body and the supporting part, and the part, corresponding to the space, on the supporting part is used for bending deformation in the process of separating the pin shaft from the pin shaft hole.
The beneficial effects are that: by adopting the technical scheme, the anti-falling elastic sheet is beneficial to being bent and deformed more easily in the later stage of forcibly extracting the pin shaft at the pin shaft inserting side of the pin shaft hole, is convenient to detach, and can be better prevented from being damaged when being detached.
Further: one end of the groove penetrates through the end face of the penetrating end of the pin shaft body along the axial direction of the pin shaft body.
The beneficial effects are that: by adopting the technical scheme, the processing of the groove is convenient, and a larger deformation space can be provided for the anti-falling elastic sheet.
Further: the overhanging portion extends obliquely toward the head of the pin body.
The beneficial effects are that: by adopting the technical scheme, the acting force required by deformation of the anti-falling elastic sheet is improved, so that the anti-falling capacity of the pin shaft is improved.
Further: the groove is a flat bottom groove.
The beneficial effects are that: by adopting the technical scheme, the groove can be processed more conveniently.
The pin shaft for the circuit breaker is used for being arranged in a pin shaft hole on a to-be-connected piece in a penetrating mode and comprises a pin shaft main body, wherein one end of the pin shaft main body is a penetrating end used for penetrating out of the to-be-connected piece when in use, and the other end of the pin shaft main body is a head; the pin shaft for the circuit breaker further comprises an anti-falling elastic piece, the anti-falling elastic piece is provided with a fixed end and an elastic deflection part, and the fixed end is fixedly connected to the penetrating-out end of the pin shaft main body; when the anti-falling elastic sheet is in a natural state, the elastic deflection part protrudes out of the outer peripheral surface of the pin shaft main body and is used for being in stop fit with a piece to be connected along the axial direction of the pin shaft main body so as to prevent the pin shaft from falling out of the pin shaft hole;
The elastic deflection part is used for swinging towards the head of the pin shaft main body under the reverse pushing action of the pin shaft inserting side opening edge of the pin shaft hole in the process of inserting the pin shaft into the pin shaft hole so as to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole; the pin shaft is also used for swinging towards the penetrating end of the pin shaft main body under the reverse pushing action of the pin shaft penetrating side opening edge of the pin shaft hole in the process of separating the pin shaft from the pin shaft hole so as to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole;
The anti-falling elastic sheet is fixed on the end face of the penetrating end of the pin shaft main body; the anti-falling elastic sheet is characterized in that an avoidance groove is formed in the penetrating end of the pin shaft main body, and is used for providing an avoidance space for the anti-falling elastic sheet swinging towards the falling-out direction of the pin shaft, so that the anti-falling elastic sheet enters the cylindrical surface range corresponding to the cross section of the pin shaft hole.
The beneficial effects are that: by adopting the technical scheme, the processing and the installation of the anti-falling elastic sheet can be conveniently realized.
Further: the longitudinal section of dodging the groove is right trapezoid, dodges the tank bottom wall in groove and include straight section and slope section, and the terminal surface of the end of wearing out of round pin axle main part is extended to the one end of straight section, and the other end is connected with the slope section, and the one end that straight section was kept away from to the slope section compares in the other end more near the head of round pin axle main part.
The beneficial effects are that: by adopting the technical scheme, the extension length of the avoidance groove is reduced, and the influence on the connection strength of the pin shaft is avoided.
Further: the anti-falling elastic sheet is provided with a fixing hole, and is fixed on the pin shaft main body through a screw penetrating through the fixing hole.
The beneficial effects are that: by adopting the technical scheme, the structure is simple, the processing is convenient, and the damaged anti-falling elastic sheet is also convenient to replace.
The arc extinguishing chamber comprises a movable end cover, a guide rod is assembled on the movable end cover in a guiding way, the guide rod is connected with a movable end insulation pull rod, pin shaft holes are formed in the movable end insulation pull rod and the guide rod, the movable end insulation pull rod and the guide rod are connected through a pin shaft, a connecting part is positioned in a supporting cylinder between the movable end cover and a movable end assembly, and an operation hole corresponding to the connecting part is formed in the outer peripheral surface of the supporting cylinder; the pin shaft comprises a pin shaft main body, wherein one end of the pin shaft main body is a penetrating end for penetrating out a piece to be connected when in use, and the other end of the pin shaft main body is a head; the pin shaft for the circuit breaker further comprises an anti-falling elastic piece, the anti-falling elastic piece is provided with a fixed end and an elastic deflection part, and the fixed end is fixedly connected to the penetrating-out end of the pin shaft main body; when the anti-falling elastic sheet is in a natural state, the elastic deflection part protrudes out of the outer peripheral surface of the pin shaft main body and is used for being in stop fit with a piece to be connected along the axial direction of the pin shaft main body so as to prevent the pin shaft from falling out of the pin shaft hole;
The elastic deflection part is used for swinging towards the head of the pin shaft main body under the reverse pushing action of the pin shaft inserting side opening edge of the pin shaft hole in the process of inserting the pin shaft into the pin shaft hole so as to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole; the pin shaft is also used for swinging towards the penetrating end of the pin shaft main body under the reverse pushing action of the pin shaft penetrating side opening edge of the pin shaft hole in the process of separating the pin shaft from the pin shaft hole so as to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole;
The outer peripheral surface of the penetrating end is provided with a groove for accommodating the anti-falling elastic sheet, and the anti-falling elastic sheet is fixed on the bottom wall of the groove; the anti-falling elastic sheet comprises a supporting part, a overhanging part and a supporting part, wherein the bottom surface of the supporting part is supported on the bottom wall of the groove, the overhanging part is arranged at one end of the supporting part, which is close to the head part of the pin shaft main body, the overhanging part bends towards the radial outer side of the pin shaft main body relative to the supporting part, and the tail end of the overhanging part protrudes out of the outer circumferential surface of the pin shaft main body; the elastic deflection portion is formed by an overhanging portion.
The beneficial effects are that: according to the technical scheme, the anti-falling elastic sheet arranged at the penetrating end of the pin shaft main body can protrude out of the outer peripheral surface of the pin shaft main body in a natural state, so that the pin shaft is limited, the pin shaft is prevented from falling out of the pin shaft hole on a to-be-connected piece, meanwhile, the elastic deflection part can deflect elastically, in the process of assembling and disassembling the pin shaft, the elastic deflection part can swing to the cylindrical surface range corresponding to the cross section of the pin shaft hole under the action of the corresponding side opening edge of the pin shaft hole, so that the assembling and disassembling of the pin shaft can be realized from the pin shaft inserting side of the pin shaft hole. The groove can provide deflection space for the elastic deflection part, the overhanging length of the elastic deflection part is also convenient to adjust through the depth of the groove, the deformation difficulty degree of the anti-falling elastic sheet is controlled, the anti-falling elastic sheet is convenient to install and fix, the structure is simple, the processing is convenient, and the deflection deformation of the anti-falling elastic sheet is also convenient when the pin shaft is installed.
Further: and a space is arranged between the fixed part between the supporting part and the pin shaft main body and the supporting part, and the part, corresponding to the space, on the supporting part is used for bending deformation in the process of separating the pin shaft from the pin shaft hole.
The beneficial effects are that: by adopting the technical scheme, the anti-falling elastic sheet is beneficial to being bent and deformed more easily in the later stage of forcibly extracting the pin shaft at the pin shaft inserting side of the pin shaft hole, is convenient to detach, and can be better prevented from being damaged when being detached.
Further: one end of the groove penetrates through the end face of the penetrating end of the pin shaft body along the axial direction of the pin shaft body.
The beneficial effects are that: by adopting the technical scheme, the processing of the groove is convenient, and a larger deformation space can be provided for the anti-falling elastic sheet.
Further: the overhanging portion extends obliquely toward the head of the pin body.
The beneficial effects are that: by adopting the technical scheme, the acting force required by deformation of the anti-falling elastic sheet is improved, so that the anti-falling capacity of the pin shaft is improved.
Further: the groove is a flat bottom groove.
The beneficial effects are that: by adopting the technical scheme, the groove can be processed more conveniently.
The arc extinguishing chamber comprises a movable end cover, a guide rod is assembled on the movable end cover in a guiding way, the guide rod is connected with a movable end insulation pull rod, pin shaft holes are formed in the movable end insulation pull rod and the guide rod, the movable end insulation pull rod and the guide rod are connected through a pin shaft, a connecting part is positioned in a supporting cylinder between the movable end cover and a movable end assembly, and an operation hole corresponding to the connecting part is formed in the outer peripheral surface of the supporting cylinder; the pin shaft comprises a pin shaft main body, wherein one end of the pin shaft main body is a penetrating end for penetrating out a piece to be connected when in use, and the other end of the pin shaft main body is a head; the pin shaft for the circuit breaker further comprises an anti-falling elastic piece, the anti-falling elastic piece is provided with a fixed end and an elastic deflection part, and the fixed end is fixedly connected to the penetrating-out end of the pin shaft main body; when the anti-falling elastic sheet is in a natural state, the elastic deflection part protrudes out of the outer peripheral surface of the pin shaft main body and is used for being in stop fit with a piece to be connected along the axial direction of the pin shaft main body so as to prevent the pin shaft from falling out of the pin shaft hole;
The elastic deflection part is used for swinging towards the head of the pin shaft main body under the reverse pushing action of the pin shaft inserting side opening edge of the pin shaft hole in the process of inserting the pin shaft into the pin shaft hole so as to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole; the pin shaft is also used for swinging towards the penetrating end of the pin shaft main body under the reverse pushing action of the pin shaft penetrating side opening edge of the pin shaft hole in the process of separating the pin shaft from the pin shaft hole so as to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole;
The anti-falling elastic sheet is fixed on the end face of the penetrating end of the pin shaft main body; the anti-falling elastic sheet is characterized in that an avoidance groove is formed in the penetrating end of the pin shaft main body, and is used for providing an avoidance space for the anti-falling elastic sheet swinging towards the falling-out direction of the pin shaft, so that the anti-falling elastic sheet enters the cylindrical surface range corresponding to the cross section of the pin shaft hole.
The beneficial effects are that: by adopting the technical scheme, the processing and the installation of the anti-falling elastic sheet can be conveniently realized.
Further: the longitudinal section of dodging the groove is right trapezoid, dodges the tank bottom wall in groove and include straight section and slope section, and the terminal surface of the end of wearing out of round pin axle main part is extended to the one end of straight section, and the other end is connected with the slope section, and the one end that straight section was kept away from to the slope section compares in the other end more near the head of round pin axle main part.
The beneficial effects are that: by adopting the technical scheme, the extension length of the avoidance groove is reduced, and the influence on the connection strength of the pin shaft is avoided.
Further: the anti-falling elastic sheet is provided with a fixing hole, and is fixed on the pin shaft main body through a screw penetrating through the fixing hole.
The beneficial effects are that: by adopting the technical scheme, the structure is simple, the processing is convenient, and the damaged anti-falling elastic sheet is also convenient to replace.
The circuit breaker comprises a crank arm box and an operating mechanism, wherein an outer crank arm is assembled on a crank arm rotating shaft of the crank arm box, a driving connecting rod is arranged between the outer crank arm and the operating mechanism, the driving connecting rod is hinged with the outer crank arm through a pin shaft, the hinged part is positioned beside the side wall of the crank arm box, and the tail end of the pin shaft faces the side wall of the crank arm box; the pin shaft comprises a pin shaft main body, wherein one end of the pin shaft main body is a penetrating end for penetrating out a piece to be connected when in use, and the other end of the pin shaft main body is a head; the pin shaft for the circuit breaker further comprises an anti-falling elastic piece, the anti-falling elastic piece is provided with a fixed end and an elastic deflection part, and the fixed end is fixedly connected to the penetrating-out end of the pin shaft main body; when the anti-falling elastic sheet is in a natural state, the elastic deflection part protrudes out of the outer peripheral surface of the pin shaft main body and is used for being in stop fit with a piece to be connected along the axial direction of the pin shaft main body so as to prevent the pin shaft from falling out of the pin shaft hole;
The elastic deflection part is used for swinging towards the head of the pin shaft main body under the reverse pushing action of the pin shaft inserting side opening edge of the pin shaft hole in the process of inserting the pin shaft into the pin shaft hole so as to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole; the pin shaft is also used for swinging towards the penetrating end of the pin shaft main body under the reverse pushing action of the pin shaft penetrating side opening edge of the pin shaft hole in the process of separating the pin shaft from the pin shaft hole so as to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole;
The outer peripheral surface of the penetrating end is provided with a groove for accommodating the anti-falling elastic sheet, and the anti-falling elastic sheet is fixed on the bottom wall of the groove; the anti-falling elastic sheet comprises a supporting part, a overhanging part and a supporting part, wherein the bottom surface of the supporting part is supported on the bottom wall of the groove, the overhanging part is arranged at one end of the supporting part, which is close to the head part of the pin shaft main body, the overhanging part bends towards the radial outer side of the pin shaft main body relative to the supporting part, and the tail end of the overhanging part protrudes out of the outer circumferential surface of the pin shaft main body; the elastic deflection portion is formed by an overhanging portion.
The beneficial effects are that: according to the technical scheme, the anti-falling elastic sheet arranged at the penetrating end of the pin shaft main body can protrude out of the outer peripheral surface of the pin shaft main body in a natural state, so that the pin shaft is limited, the pin shaft is prevented from falling out of the pin shaft hole on a to-be-connected piece, meanwhile, the elastic deflection part can deflect elastically, in the process of assembling and disassembling the pin shaft, the elastic deflection part can swing to the cylindrical surface range corresponding to the cross section of the pin shaft hole under the action of the corresponding side opening edge of the pin shaft hole, so that the assembling and disassembling of the pin shaft can be realized from the pin shaft inserting side of the pin shaft hole. The groove can provide deflection space for the elastic deflection part, the overhanging length of the elastic deflection part is also convenient to adjust through the depth of the groove, the deformation difficulty degree of the anti-falling elastic sheet is controlled, the anti-falling elastic sheet is convenient to install and fix, the structure is simple, the processing is convenient, and the deflection deformation of the anti-falling elastic sheet is also convenient when the pin shaft is installed.
Further: and a space is arranged between the fixed part between the supporting part and the pin shaft main body and the supporting part, and the part, corresponding to the space, on the supporting part is used for bending deformation in the process of separating the pin shaft from the pin shaft hole.
The beneficial effects are that: by adopting the technical scheme, the anti-falling elastic sheet is beneficial to being bent and deformed more easily in the later stage of forcibly extracting the pin shaft at the pin shaft inserting side of the pin shaft hole, is convenient to detach, and can be better prevented from being damaged when being detached.
Further: one end of the groove penetrates through the end face of the penetrating end of the pin shaft body along the axial direction of the pin shaft body.
The beneficial effects are that: by adopting the technical scheme, the processing of the groove is convenient, and a larger deformation space can be provided for the anti-falling elastic sheet.
Further: the overhanging portion extends obliquely toward the head of the pin body.
The beneficial effects are that: by adopting the technical scheme, the acting force required by deformation of the anti-falling elastic sheet is improved, so that the anti-falling capacity of the pin shaft is improved.
Further: the groove is a flat bottom groove.
The beneficial effects are that: by adopting the technical scheme, the groove can be processed more conveniently.
The circuit breaker comprises a crank arm box and an operating mechanism, wherein an outer crank arm is assembled on a crank arm rotating shaft of the crank arm box, a driving connecting rod is arranged between the outer crank arm and the operating mechanism, the driving connecting rod is hinged with the outer crank arm through a pin shaft, the hinged part is positioned beside the side wall of the crank arm box, and the tail end of the pin shaft faces the side wall of the crank arm box; the pin shaft comprises a pin shaft main body, wherein one end of the pin shaft main body is a penetrating end for penetrating out a piece to be connected when in use, and the other end of the pin shaft main body is a head; the pin shaft for the circuit breaker further comprises an anti-falling elastic piece, the anti-falling elastic piece is provided with a fixed end and an elastic deflection part, and the fixed end is fixedly connected to the penetrating-out end of the pin shaft main body; when the anti-falling elastic sheet is in a natural state, the elastic deflection part protrudes out of the outer peripheral surface of the pin shaft main body and is used for being in stop fit with a piece to be connected along the axial direction of the pin shaft main body so as to prevent the pin shaft from falling out of the pin shaft hole;
The elastic deflection part is used for swinging towards the head of the pin shaft main body under the reverse pushing action of the pin shaft inserting side opening edge of the pin shaft hole in the process of inserting the pin shaft into the pin shaft hole so as to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole; the pin shaft is also used for swinging towards the penetrating end of the pin shaft main body under the reverse pushing action of the pin shaft penetrating side opening edge of the pin shaft hole in the process of separating the pin shaft from the pin shaft hole so as to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole;
The anti-falling elastic sheet is fixed on the end face of the penetrating end of the pin shaft main body; the anti-falling elastic sheet is characterized in that an avoidance groove is formed in the penetrating end of the pin shaft main body, and is used for providing an avoidance space for the anti-falling elastic sheet swinging towards the falling-out direction of the pin shaft, so that the anti-falling elastic sheet enters the cylindrical surface range corresponding to the cross section of the pin shaft hole.
The beneficial effects are that: by adopting the technical scheme, the processing and the installation of the anti-falling elastic sheet can be conveniently realized.
Further: the longitudinal section of dodging the groove is right trapezoid, dodges the tank bottom wall in groove and include straight section and slope section, and the terminal surface of the end of wearing out of round pin axle main part is extended to the one end of straight section, and the other end is connected with the slope section, and the one end that straight section was kept away from to the slope section compares in the other end more near the head of round pin axle main part.
The beneficial effects are that: by adopting the technical scheme, the extension length of the avoidance groove is reduced, and the influence on the connection strength of the pin shaft is avoided.
Further: the anti-falling elastic sheet is provided with a fixing hole, and is fixed on the pin shaft main body through a screw penetrating through the fixing hole.
The beneficial effects are that: by adopting the technical scheme, the structure is simple, the processing is convenient, and the damaged anti-falling elastic sheet is also convenient to replace.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the arc extinguishing chamber of the present invention;
FIG. 2 is a schematic view of a portion of the pin connection of FIG. 1;
FIG. 3 is a schematic structural view of example 1 of a pin for an interrupt circuit according to the present invention;
FIG. 4 is a schematic view of the pin of FIG. 3 in use;
fig. 5 is a schematic structural view of embodiment 2 of a pin for an interrupt circuit according to the present invention;
fig. 6 is a schematic diagram of the structure of an embodiment of a circuit breaker of the present invention;
FIG. 7 is an enlarged view of a portion of the lever box of FIG. 6;
FIG. 8 is a top view of the connection of the inner and outer lever to the corresponding parts at the lever box.
The names of the corresponding components in the figures are: 10. a pin main body; 11. a penetrating end; 12. a head; 13. a groove; 20. an anti-falling elastic sheet; 21. a support portion; 22. an elastic deflection portion; 23. a screw; 31. a threaded hole; 32. an avoidance groove; 33. a straight section; 34. an inclined section; 40. a member to be connected; 41. a pin shaft hole; 101. a movable end insulating pull rod; 102. a movable end cover; 103. a guide rod; 104. a moving end assembly; 105. a support cylinder; 106. an operation hole; 201. a bracket; 202. an operating mechanism; 203. a crank arm box; 204. an insulating support; 205. an arc extinguishing chamber; 206. an outer crank arm; 207. an inner crank arm; 208. a crank arm rotating shaft; 209. a drive link; 210. an output crank arm; 211. an insulating pull rod.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It should be noted that in the present embodiment, relational terms such as "first" and "second" and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the phrase "comprising one … …" or the like does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises a depicted element.
In the description of the present invention, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
In the description of the present invention, unless explicitly stated and limited otherwise, the term "provided" as may occur, for example, as an object of "provided" may be a part of a body, may be separately arranged from the body, and may be connected to the body, and may be detachably connected or may be non-detachably connected. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
The present invention is described in further detail below with reference to examples.
Example 1 of the arc extinguishing chamber in the present invention:
As shown in fig. 1 and 2, the arc extinguishing chamber comprises a movable end cover 102, a guide rod 103 is assembled on the movable end cover 102 in a guiding manner, the guide rod 103 is connected with a movable end insulation pull rod 101, pin holes are formed in the movable end insulation pull rod 101 and the guide rod 103, the connection parts are positioned in a supporting cylinder 105 between the movable end cover 102 and a movable end assembly 104 through pin shaft connection, and an operation hole 106 corresponding to the connection parts is formed in the outer circumferential surface of the supporting cylinder 105. The pin is a pin for a circuit breaker as shown in fig. 3 and 4, and is used for being installed in a pin hole 41 on a piece 40 to be connected (an instant end insulation pull rod 101 and a guide rod 103 in the embodiment) in a penetrating way, and comprises a pin main body 10 and an anti-falling elastic piece 20.
The pin shaft main body 10 is of a cylindrical structure, one end of the pin shaft main body is a penetrating end 11, the pin shaft main body is used for penetrating out a to-be-connected piece 40 in use, and the other end of the pin shaft main body is a head 12. The outer peripheral surface of the penetrating end 11 is provided with a groove 13 for accommodating the anti-falling elastic sheet 20; the groove 13 is a flat bottom groove, and one end of the groove, which is far away from the head 12 of the pin body 10, penetrates the end face of the penetrating end 11 of the pin body 10 along the axial direction of the pin body 10.
The anti-falling elastic sheet 20 is positioned in the groove 13 and fixed on the bottom wall of the groove 13. Specifically, the anti-falling elastic sheet 20 has a V-shaped structure, and includes a support portion 21 and an overhanging portion, i.e., an elastic deflection portion 22. The angle between the support portion 21 and the overhanging portion is greater than 90 degrees.
In this embodiment, the supporting portion 21 and the overhanging portion are both straight sheet structures, and the connection positions of the two are in arc transition. The bottom surface of the supporting portion 21 is supported on the bottom wall of the recess 13, and the end thereof is provided with a fixing hole forming a fixing end, and is fixed to the pin body 10 by a screw 23 passing through the fixing hole. The fixing holes constitute fixing portions of the supporting portion 21, with a space between the fixing portions and the supporting portion 21, and portions of the supporting portion 21 corresponding to the space are adapted to be bent and deformed during detachment of the pin from the pin hole 41.
The support portion 21 extends along the axis of the pin body 10, the overhanging portion is provided at one end of the support portion 21 near the head portion 12 of the pin body 10, and is bent radially outward of the pin body 10 with respect to the support portion 21 to form an inclined structure, one end of the overhanging portion remote from the support portion 21 is closer to the head portion 12 of the pin body 10 than the other end, and the tip protrudes beyond the outer peripheral surface of the pin body 10.
In the process of inserting the pin shaft into the pin shaft hole 41, the elastic deflection part 22 formed by the overhanging part is used for being reversely pushed by the pin shaft insertion side opening of the pin shaft hole 41 to swing towards the head 12 of the pin shaft main body 10 until entering the cylindrical surface range corresponding to the cross section of the pin shaft hole 41; during the process of disengaging the pin shaft from the pin shaft hole 41, the elastic deflection portion 22 is used for being pushed back by the pin shaft penetrating side opening of the pin shaft hole 41 and swinging towards the penetrating end 11 of the pin shaft main body 10 until entering the cylindrical surface range corresponding to the cross section of the pin shaft hole 41.
In use, the pins are inserted into the pin holes 41 in the member 40 to be connected in the mounting direction corresponding to the arrow shown in fig. 4. With the increase of the insertion depth of the pin shaft, the anti-falling elastic sheet 20 will contact with the pin shaft insertion side edge of the pin shaft hole 41, at this time, the insertion force of the pin shaft is increased, and the elastic deflection portion 22 of the anti-falling elastic sheet 20 will swing towards the head 12 of the pin shaft main body 10 under the counter-pushing action of the pin shaft insertion side edge of the pin shaft hole 41 until entering the cylindrical surface range corresponding to the cross section of the pin shaft hole 41, so that the pin shaft can be continuously inserted into the pin shaft hole 41. After the elastic deflection part 22 of the anti-falling elastic sheet 20 enters the pin shaft hole 41, the deflection state is kept under the limit of the wall of the pin shaft hole 41 until the tail end of the elastic deflection part 22 moves to the penetrating side of the pin shaft hole 41, at the moment, the elastic deflection part 22 of the anti-falling elastic sheet 20 rebounds and returns to the natural state, and forms axial blocking fit with the side surface of the penetrating side of the pin shaft hole 41, so that the pin shaft can be prevented from falling out of the pin shaft hole 41, and the pin shaft is installed in place.
Of course, since the anti-falling spring 20 needs to be elastically deformed to meet the installation requirement, the stiffness is limited, and the anti-falling force which can be formed is limited, so the pin shaft of the present invention is suitable for the axial non-load or light load working condition. Preferably, in this embodiment, the material of the anti-falling elastic sheet 20 is spring steel such as 65Mn or 70Mn, or 50# carbon steel or 50# strip steel may be used. Of course, according to the usage characteristics of the anti-falling elastic sheet 20, other materials with better elasticity can be suitable, which can be selected by those skilled in the art according to the requirements.
When the pin shaft is disassembled, the anti-falling elastic sheet 20 can be pressed by manpower, so that the anti-falling elastic sheet 20 enters the cylindrical surface range corresponding to the cross section of the pin shaft hole 41, and the pin shaft can be pulled out from the insertion side of the pin shaft hole 41. If it is inconvenient to press the anti-release spring 20 from the exit side of the pin hole 41, the pin can be forcibly pulled out from the insertion side of the pin hole 41, and in the pulling process, under the reverse pushing action of the exit edge of the pin hole 41, the elastic deflection portion 22 of the anti-release spring 20 swings towards the exit end 11 of the pin body 10 to form a bend, and enters the cylindrical surface range corresponding to the cross section of the pin hole 41. At this time, the supporting portion 21 of the anti-drop spring 20 can swing toward the notch side of the groove 13 at the same time, which is more advantageous for the elastic deflection portion 22 to enter into the cylindrical surface range corresponding to the cross section of the pin shaft hole 41. Considering the fatigue performance of the anti-falling elastic sheet 20, the pin in this embodiment is not suitable for multiple disassembly and assembly.
Example 2 of the arc extinguishing chamber in the present invention:
This embodiment differs from embodiment 1 in that: in embodiment 1, a groove 13 is provided on a pin body 10, and an anti-falling elastic sheet 20 is provided in the groove 13. In this embodiment, as shown in fig. 5, a threaded hole 31 is provided on the end face of the penetrating end 11 of the pin body 10, the anti-falling elastic sheet 20 is a straight elastic sheet, one end of the anti-falling elastic sheet is provided with a fixing hole to form a fixing end, and the fixing end is fixed on a portion of the end face of the pin body 10, which is close to the outer peripheral surface, through a screw 23. Meanwhile, the through end 11 of the pin shaft main body 10 is provided with an avoidance groove 32, and the avoidance groove 32 is used for providing an avoidance space for the anti-falling elastic sheet 20 swinging towards the falling-out direction of the pin shaft, so that the anti-falling elastic sheet 20 enters the cylindrical surface range corresponding to the cross section of the pin shaft hole 41. The longitudinal section of the avoidance groove 32 is a right trapezoid, the groove bottom wall of the avoidance groove comprises a straight section 33 and an inclined section 34, one end of the straight section 33 extends to the end face of the penetrating end 11 of the pin shaft main body 10, the other end of the straight section is connected with the inclined section 34, and one end of the inclined section 34 away from the straight section 33 is closer to the head 12 of the pin shaft main body 10 than the other end.
When the pin shaft in the embodiment 2 is dismounted, a similar mode to the embodiment can be adopted, but no matter the pin shaft is mounted or dismounted, the anti-falling elastic sheet 20 with a straight structure only needs to swing by a small angle, and the fatigue resistance is better, so that the anti-falling elastic sheet can be better suitable for the condition that the pin shaft needs to be dismounted for many times. Of course, the pin in embodiment 1 can provide a larger anti-drop force than that in embodiment 2.
Example 3 of the arc chute of the invention:
This embodiment differs from embodiment 1 in that: in embodiment 1, the overhanging portion of the drop preventing dome 20 is arranged obliquely toward the head 12 of the pin body 10. In the present embodiment, the extending direction of the overhanging portion of the anti-falling elastic sheet 20 is perpendicular to the axis of the pin body 10.
Example 4 of the arc chute of the invention:
This embodiment differs from embodiment 1 in that: in embodiment 1, the anti-falling elastic sheet 20 is fixed on the pin shaft main body 10 through the screw 23, so that the replacement is convenient. In this embodiment, the anti-falling elastic sheet is welded and fixed on the pin shaft main body 10. In other embodiments, the anti-falling elastic sheet can also be fixed by other manners, such as riveting.
Example 5 of the arc extinguishing chamber in the present invention:
This embodiment differs from embodiment 1 in that: in embodiment 1, one end of the groove 13 on the pin body 10 for accommodating the anti-falling spring 20 penetrates the end face of the penetrating end 11 of the pin body 10 along the axial direction of the pin body 10. In this embodiment, both ends of the groove 13 in the length direction are of a closed structure, and one end of the groove 13, which is far away from the head 12 of the pin shaft main body 10, is provided with an avoiding section for avoiding the elastic deflection portion 22 deflected to the cylindrical surface range corresponding to the cross section of the pin shaft hole 41.
Example 6 of the arc extinguishing chamber in the present invention:
This embodiment differs from embodiment 1 in that: in embodiment 2, the escape groove 32 includes a straight section 33 and an inclined section 34. In the present embodiment, the avoiding groove 32 has a flat bottom structure, which is similar to the shape of the groove 13 in embodiment 1. Of course, in other embodiments, the relief groove 32 may be provided in other shapes, such as a shape in which the groove bottom wall is entirely sloped.
In the above embodiment, the anti-falling elastic piece 20 is provided at only one place, and in other embodiments, two or more anti-falling elastic pieces 20 may be provided along the circumferential direction.
Examples 1 to 6 of pin shafts for an interrupt circuit according to the present invention:
the pin for circuit breaker, which is described in any of the embodiments of the arc extinguishing chamber, will not be repeated here.
Example 1 of the circuit breaker in the present invention:
The circuit breaker in this embodiment is a column type circuit breaker, as shown in fig. 6 and 7, and includes a bracket 201, a lever box 203 is fixed on the top of the bracket 201, and an insulating support 204 and an arc extinguishing chamber 205 are sequentially fixed on the top of the lever box 203. An operating mechanism 202 is fixed on the side surface of the bracket 201, and the operating mechanism 202 is used for driving a movable end of the arc extinguishing chamber 205 to act through the crank arm box 203 so as to realize opening and closing of the circuit breaker. As shown in fig. 8, the lever box 203 includes an outer lever 206 and an inner lever 207, the outer lever 206 and the inner lever 207 are fixed on a lever rotation shaft 208, and the lever rotation shaft 208 is rotatably assembled on a bearing seat provided on a box body of the lever box 203 through a bearing. The outer crank arm 206 passes through an opening on the side surface of the crank arm box 203 and is connected with an output crank arm 210 of the operating mechanism 202 through a driving connecting rod 209, and two ends of the driving connecting rod 209 are respectively hinged with the outer crank arm 206 and the output crank arm 210 of the operating mechanism 202 to form a connecting rod mechanism; an insulating pull rod 211 is arranged between the inner crank arm 207 and a moving contact (not shown in the figure) of the arc extinguishing chamber 205, the insulating pull rod 211 is arranged along the up-down direction, penetrates through the insulating support 204, and the upper end and the lower end are respectively hinged with the inner crank arm 207 and a guide rod fixed on the moving contact. When the circuit breaker acts, the operating mechanism 202 drives the outer crank arm 206 to swing through the driving connecting rod 209, and then drives the inner crank arm 207 to swing, so that the moving contact action of the arc extinguishing chamber 205 is finally realized. The above-described structure is a common form of the existing circuit breaker, and will not be described in detail herein. Unlike the prior art, the driving link 209 is hinged to the outer lever 206 by the pin described in the above-mentioned pin embodiment 1 of the pin for the circuit breaker, the hinge part is located at the side of the sidewall of the lever box 203, and the end of the pin faces the sidewall of the lever box 203; the pin shaft comprises a pin shaft main body 10 and an anti-falling elastic sheet 20, and a driving connecting rod 209 and an outer crank arm 206 are used as to-be-connected pieces of the pin shaft. Because the spacing between the outer lever 206 and the corresponding side wall of the lever box 203 is limited, it is difficult to install cotter pins or circlips by tools, and with the pin shaft for a circuit breaker of the present invention, the operation can be performed from the side of the outer lever 206 away from the corresponding side wall of the lever box 203, and the disassembly and assembly are convenient. Of course, in other embodiments, the pin between the drive link 209 and the outer lever 206 may be the pin described in the remaining embodiments of the breaker pin described above.
The above description is only a preferred embodiment of the present invention, and the patent protection scope of the present invention is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The pin shaft for the circuit breaker is used for being arranged in a pin shaft hole (41) on a to-be-connected piece (40) in a penetrating way and comprises a pin shaft main body (10), one end of the pin shaft main body (10) is a penetrating end (11) used for penetrating out of the to-be-connected piece (40) when in use, and the other end is a head (12); the pin shaft for the circuit breaker is characterized by further comprising an anti-falling elastic piece (20), wherein the anti-falling elastic piece (20) is provided with a fixed end and an elastic deflection part (22), and the fixed end is fixedly connected with the penetrating end (11) of the pin shaft main body (10); when the anti-falling elastic sheet (20) is in a natural state, the elastic deflection part (22) protrudes out of the outer peripheral surface of the pin shaft main body (10) and is used for being matched with a to-be-connected piece (40) along the axial stop of the pin shaft main body (10) so as to prevent the pin shaft from falling out of the pin shaft hole (41);
The elastic deflection part (22) is used for swinging towards the head part (12) of the pin shaft main body (10) under the back pushing action of the pin shaft inserting side opening edge of the pin shaft hole (41) and entering the cylindrical surface range corresponding to the cross section of the pin shaft hole (41) in the process of inserting the pin shaft into the pin shaft hole (41); the pin shaft is also used for swinging towards the penetrating end (11) of the pin shaft main body (10) under the back thrust action of the pin shaft penetrating side opening edge of the pin shaft hole (41) and entering the cylindrical surface range corresponding to the cross section of the pin shaft hole (41) in the process that the pin shaft is separated from the pin shaft hole (41);
The outer peripheral surface of the penetrating end (11) is provided with a groove (13) for accommodating the anti-falling elastic sheet (20), and the anti-falling elastic sheet (20) is fixed on the bottom wall of the groove (13); the anti-falling elastic sheet (20) comprises a supporting part (21) with the bottom surface supported on the bottom wall of the groove (13), and also comprises an overhanging part arranged at one end of the supporting part (21) close to the head part (12) of the pin shaft main body (10), the overhanging part bends towards the radial outer side of the pin shaft main body (10) relative to the supporting part (21), and the tail end protrudes out of the outer peripheral surface of the pin shaft main body (10); the elastic deflection portion (22) is formed by an overhanging portion.
2. The pin for a circuit breaker according to claim 1, characterized in that a space is provided between a fixing portion between the support portion (21) and the pin body (10) and the support portion (21), and a portion of the support portion (21) corresponding to the space is adapted to be bent and deformed during the detachment of the pin from the pin hole (41).
3. Pin for circuit breaker according to any of claims 1 to 2, characterized in that the elastic deflection portion (22) extends obliquely towards the head (12) of the pin body (10).
4. Pin for circuit breaker according to any of claims 1 to 2, characterized in that the recess (13) is a flat bottom groove.
5. The pin shaft for the circuit breaker is used for being arranged in a pin shaft hole (41) on a to-be-connected piece (40) in a penetrating way and comprises a pin shaft main body (10), one end of the pin shaft main body (10) is a penetrating end (11) used for penetrating out of the to-be-connected piece (40) when in use, and the other end is a head (12); the pin shaft for the circuit breaker is characterized by further comprising an anti-falling elastic piece (20), wherein the anti-falling elastic piece (20) is provided with a fixed end and an elastic deflection part (22), and the fixed end is fixedly connected with the penetrating end (11) of the pin shaft main body (10); when the anti-falling elastic sheet (20) is in a natural state, the elastic deflection part (22) protrudes out of the outer peripheral surface of the pin shaft main body (10) and is used for being matched with a to-be-connected piece (40) along the axial stop of the pin shaft main body (10) so as to prevent the pin shaft from falling out of the pin shaft hole (41);
The elastic deflection part (22) is used for swinging towards the head part (12) of the pin shaft main body (10) under the back pushing action of the pin shaft inserting side opening edge of the pin shaft hole (41) and entering the cylindrical surface range corresponding to the cross section of the pin shaft hole (41) in the process of inserting the pin shaft into the pin shaft hole (41); the pin shaft is also used for swinging towards the penetrating end (11) of the pin shaft main body (10) under the back thrust action of the pin shaft penetrating side opening edge of the pin shaft hole (41) and entering the cylindrical surface range corresponding to the cross section of the pin shaft hole (41) in the process that the pin shaft is separated from the pin shaft hole (41);
The anti-falling elastic sheet (20) is fixed on the end face of the penetrating end (11) of the pin shaft main body (10); the anti-falling elastic piece (20) swinging towards the falling-off direction of the pin shaft is characterized in that the penetrating end (11) of the pin shaft main body (10) is provided with a avoiding groove (32), and the avoiding groove (32) is used for providing a avoiding space for the anti-falling elastic piece (20) swinging towards the falling-off direction of the pin shaft, so that the anti-falling elastic piece (20) enters a cylindrical surface range corresponding to the cross section of the pin shaft hole (41).
6. The pin shaft for a circuit breaker according to claim 5, wherein the longitudinal section of the avoidance groove (32) is in a right trapezoid shape, the groove bottom wall of the avoidance groove (32) comprises a straight section (33) and an inclined section (34), one end of the straight section (33) extends to the end face of the penetrating end (11) of the pin shaft main body (10), the other end is connected with the inclined section (34), and one end of the inclined section (34) away from the straight section (33) is closer to the head (12) of the pin shaft main body (10) than the other end.
7. The arc extinguishing chamber comprises a movable end cover (102), a guide rod (103) is assembled on the movable end cover (102) in a guiding way, the guide rod (103) is connected with a movable end insulation pull rod (101), pin holes are formed in the movable end insulation pull rod (101) and the guide rod (103) and are connected through pin shafts, a connecting part is positioned in a supporting cylinder (105) between the movable end cover (102) and a movable end assembly (104), and an operation hole (106) corresponding to the connecting part is formed in the outer circumferential surface of the supporting cylinder (105); the method is characterized in that: the pin shaft for a circuit breaker according to any one of claims 1 to 6.
8. The circuit breaker comprises a crank arm box (203) and an operating mechanism (202), wherein an outer crank arm (206) is assembled on a crank arm rotating shaft (208) of the crank arm box (203), a driving connecting rod (209) is arranged between the outer crank arm (206) and the operating mechanism (202), the driving connecting rod (209) is hinged with the outer crank arm (206) through a pin shaft, the hinged part is positioned at the side wall of the crank arm box (203), and the tail end of the pin shaft faces the side wall of the crank arm box (203); the pin for a circuit breaker according to any one of claims 1 to 6 is used as the pin.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111566999 | 2021-12-20 | ||
| CN2021115669992 | 2021-12-20 |
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| CN114678237B true CN114678237B (en) | 2024-05-17 |
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| CN202210195382.2A Active CN114678237B (en) | 2021-12-20 | 2022-03-01 | Pin shaft for circuit breaker, arc extinguishing chamber using pin shaft and circuit breaker |
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| CN202678142U (en) * | 2012-05-14 | 2013-01-16 | 平高集团有限公司 | Slide rail type auxiliary switch transmission device |
| CN110211853A (en) * | 2018-02-28 | 2019-09-06 | 中航光电科技股份有限公司 | Plug and its fuse component, fuse component sheath |
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