CN114678237A - Pin shaft for circuit breaker, arc extinguish chamber using pin shaft and circuit breaker - Google Patents

Pin shaft for circuit breaker, arc extinguish chamber using pin shaft and circuit breaker Download PDF

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Publication number
CN114678237A
CN114678237A CN202210195382.2A CN202210195382A CN114678237A CN 114678237 A CN114678237 A CN 114678237A CN 202210195382 A CN202210195382 A CN 202210195382A CN 114678237 A CN114678237 A CN 114678237A
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CN
China
Prior art keywords
pin shaft
pin
main body
circuit breaker
falling
Prior art date
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Granted
Application number
CN202210195382.2A
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Chinese (zh)
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CN114678237B (en
Inventor
高凯
王文博
党睿
穆峰磊
谭盛武
李鹏
段晓辉
黄经纬
杨珂
朱金康
赵文涛
何洲
雷小龙
孙珂珂
杜迎乾
魏建巍
韩峰
王鹏超
朱秋楠
王双盾
董放
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pinggao Group Co Ltd
State Grid Shanghai Electric Power Co Ltd
State Grid Xinjiang Electric Power Co Ltd
Original Assignee
Pinggao Group Co Ltd
State Grid Shanghai Electric Power Co Ltd
State Grid Xinjiang Electric Power Co Ltd
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Application filed by Pinggao Group Co Ltd, State Grid Shanghai Electric Power Co Ltd, State Grid Xinjiang Electric Power Co Ltd filed Critical Pinggao Group Co Ltd
Publication of CN114678237A publication Critical patent/CN114678237A/en
Application granted granted Critical
Publication of CN114678237B publication Critical patent/CN114678237B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • 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

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  • 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 extinguish 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 sheet, 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 part; the anti-falling elastic sheet is provided with a fixed end and an elastic deflection part, and the fixed end is fixedly connected with 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 matched with a to-be-connected piece in a blocking mode 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 reverse thrust action of the opening edge of the pin shaft hole and entering the cylindrical surface range corresponding to the cross section of the pin shaft hole in the process that the pin shaft is inserted into the pin shaft hole and separated from the pin shaft hole. The invention can solve the problem that the application of the existing pin shaft in the occasion with narrow space in the circuit breaker is inconvenient.

Description

Pin shaft for circuit breaker, arc extinguish chamber using pin shaft and circuit breaker
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, can also be used at the hinge joint of the two parts, and forms a revolute pair with a connected piece to form hinge connection. At present, the pin shaft connection is basically that a pin shaft is matched with a split pin or an elastic check ring (namely a clamp spring) for use, and during specific installation, the pin shaft is inserted from one side of a pin shaft hole, and the split pin or the elastic check ring is installed on the other side. Connecting rods are adopted for transmission among more parts in the circuit breaker, and the corresponding connecting rods can be conveniently disassembled and assembled through the pin shaft connecting structure, so that the application of the pin shaft is very wide. For example, in an arc extinguish 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 movable end of an arc extinguish chamber in the circuit breaker is connected with a corresponding connecting rod through a pin shaft.
However, both the split pin and the circlip need to be attached and detached with a certain tool, and a certain operation space is required. Therefore, in some occasions with narrow space, the pin shaft is inconvenient to assemble and disassemble, or the structure of the joint needs to be modified, so that the application of the pin shaft is limited. For example, in the explosion chamber, the position of being connected of moving end insulation pull rod and the guide bar on the moving end cover is located and supports in moving the support section of thick bamboo between end cover and the moving end subassembly, is equipped with the handle hole on the outer peripheral face of support section of thick bamboo, supplies the instrument to stretch into the inside round pin axle dismouting operation that carries out of support section of thick bamboo, and the operation is very inconvenient, if the diameter that increases the support section of thick bamboo enlarges operating space, because need have a certain interval in order to satisfy insulating requirement between support section of thick bamboo and the explosion chamber barrel, need increase the diameter of explosion chamber barrel simultaneously again. In addition, the existing pin shaft connecting structure has low installation efficiency due to the need of installing a split pin or an elastic check ring.
Disclosure of Invention
The invention aims to provide a pin shaft for a circuit breaker, an arc extinguish chamber using the pin shaft and the circuit breaker, and solves the problem that the existing pin shaft is inconvenient to apply in the occasion with narrow space in the circuit breaker due to the fact that a split pin or an elastic retainer ring needs 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, one end of the pin shaft main body is a penetrating end used for penetrating out of the to-be-connected piece when the pin shaft main body is used, and the other end of the pin shaft main body is a head; the pin shaft for the circuit breaker further comprises an anti-drop elastic sheet, the anti-drop 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 matched with a to-be-connected piece in a blocking mode 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 thrust action of the pin shaft insertion side opening edge of the pin shaft hole in the process of inserting the pin shaft into the pin shaft hole and entering a cylindrical surface range corresponding to the cross section of the pin shaft hole; and the pin shaft is also used for swinging towards the penetrating end of the pin shaft main body under the reverse thrust action of the pin shaft penetrating out of the side opening edge in the pin shaft hole to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole in the process of separating the pin shaft from the pin shaft hole.
Has the advantages that: by adopting 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 being separated from the pin shaft hole on the part to be connected, meanwhile, the elastic deflection part can elastically deflect, 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 inserting side of the pin shaft hole, compared with the prior art, a split pin or an elastic retainer ring is not required to be installed, the anti-falling elastic sheet can be better applied to the occasion of space, the anti-falling elastic sheet is fixedly connected to the penetrating end of the pin shaft main body through a fixed end, the structure is simple, the large deflection deformation can be realized, the smooth installation of the pin shaft is convenient, and the assembly and disassembly maintenance efficiency is improved, the cost is reduced.
Further: the outer peripheral face 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 groove bottom wall of the groove.
Has the advantages that: adopt above-mentioned technical scheme be convenient for setting of anticreep shell fragment to the recess can provide the beat space for elasticity beat part, also is convenient for simultaneously adjust the overhanging length of elasticity beat part through the degree of depth of recess, controls the deformation degree of difficulty of anticreep shell fragment.
Further, the method comprises the following steps: the anti-falling elastic sheet comprises a supporting part with the bottom surface supported on the bottom wall of the groove and an overhanging part arranged at one end of the supporting part close to the head part of the pin shaft main body, the overhanging part is bent 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 peripheral surface of the pin shaft main body; the resilient deflection portion is formed by an overhanging portion.
Has the beneficial effects that: by adopting the technical scheme, 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 convenient when the pin shaft is installed.
Further: and a space is formed between the fixing part between the supporting part and the pin shaft main body and the supporting part, and the part of the supporting part corresponding to the space is used for bending and deforming in the process of separating the pin shaft from the pin shaft hole.
Has the advantages that: adopt above-mentioned technical scheme to be favorable to inserting the later stage that the side forces the round pin axle of taking out the round pin axle at the round pin axle in round pin axle hole and make the anticreep shell fragment bending deformation more easily, convenient to detach also can avoid leading to the anticreep shell fragment impaired when dismantling better.
Further: one end of the groove penetrates through the end face of the penetrating end of the pin shaft main body along the axial direction of the pin shaft main body.
Has the advantages that: adopt above-mentioned technical scheme be convenient for the processing of recess, also can provide bigger deformation space for the anticreep shell fragment.
Further: the overhanging portion extends obliquely toward the head of the pin shaft main body.
Has the advantages that: by adopting the technical scheme, the acting force required by deformation of the anti-falling elastic sheet is favorably improved, so that the anti-falling capacity of the pin shaft is improved.
Further: the groove is a flat bottom groove.
Has the advantages that: by adopting the technical scheme, the groove can be processed more conveniently.
Further: the anti-falling elastic sheet is fixed on the end face of the penetrating end of the pin shaft main body; the passing-out end of the pin shaft main body is provided with an avoiding groove, and the avoiding groove is used for providing an avoiding 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.
Has the advantages 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 the avoiding groove is in a right trapezoid shape, the groove bottom wall of the avoiding groove comprises a straight section and an inclined section, one end of the straight section extends to the end face of the penetrating end of the pin shaft main body, the other end of the straight section is connected with the inclined section, and one end, far away from the straight section, of the inclined section is compared with the head, close to the pin shaft main body, of the other end of the inclined section.
Has the beneficial effects that: adopt above-mentioned technical scheme to be favorable to reducing the extension length who dodges the groove, avoid influencing the joint strength of round pin axle from this.
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.
Has the advantages that: adopt above-mentioned technical scheme simple structure, the processing of being convenient for also is convenient for change impaired anticreep shell fragment.
The arc extinguish chamber comprises a movable end cover, a guide rod is assembled on the movable end cover in a guiding mode, the guide rod is connected with a movable end insulating pull rod, pin shaft holes are formed in the movable end insulating pull rod and the guide rod and connected through pin shafts, the connecting part is located in a supporting cylinder between the movable end cover and the 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, one end of the pin shaft main body is a penetrating end which is 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 part; the pin shaft for the circuit breaker further comprises an anti-falling elastic sheet, 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 matched with a to-be-connected piece in a blocking mode 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 body under the reverse thrust action of the edge of the pin shaft insertion side opening 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 the pin shaft into the pin shaft hole; and the pin shaft is also used for swinging towards the penetrating end of the pin shaft main body under the reverse thrust action of the pin shaft penetrating out of the 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.
Has the beneficial effects that: by adopting the technical scheme, the anti-drop 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 being separated from a pin shaft hole on a to-be-connected piece, meanwhile, the elastic deflection part can elastically deflect, 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 inserting side of the pin shaft hole, compared with the prior art, a split pin or an elastic check ring is not required to be installed, the anti-drop elastic sheet can be better applied to the occasions in space, and the anti-drop elastic sheet is fixedly connected to the penetrating end of the pin shaft main body through a fixed end, the structure is simple, large deflection deformation can be realized, the smooth installation of the pin shaft is convenient, and the assembly and disassembly maintenance efficiency is improved, the cost is reduced.
Further, the method comprises the following steps: the outer peripheral face 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 groove bottom wall of the groove.
Has the beneficial effects that: adopt above-mentioned technical scheme be convenient for the setting of anticreep shell fragment to the recess can provide the beat space for elasticity beat part, also is convenient for simultaneously adjust the overhang length of elasticity beat part through the degree of depth of recess, controls the deformation difficult degree of anticreep shell fragment.
Further, the method comprises the following steps: the anti-falling elastic sheet comprises a supporting part and an overhanging 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 is bent 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 peripheral surface of the pin shaft main body; the resilient deflection portion is formed by an overhanging portion.
Has the advantages that: by adopting the technical scheme, 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 convenient when the pin shaft is installed.
Further: and a space is formed between the fixing part between the supporting part and the pin shaft main body and the supporting part, and the part of the supporting part corresponding to the space is used for bending and deforming in the process of separating the pin shaft from the pin shaft hole.
Has the advantages that: adopt above-mentioned technical scheme to be favorable to inserting the later stage that the side forces the round pin axle of taking out the round pin axle at the round pin axle in round pin axle hole and make the anticreep shell fragment bending deformation more easily, convenient to detach also can avoid leading to the anticreep shell fragment impaired when dismantling better.
Further: one end of the groove penetrates through the end face of the penetrating end of the pin shaft main body along the axial direction of the pin shaft main body.
Has the advantages that: adopt above-mentioned technical scheme be convenient for the processing of recess, also can provide bigger deformation space for the anticreep shell fragment.
Further: the overhanging portion extends obliquely toward the head of the pin shaft main body.
Has the advantages that: by adopting the technical scheme, the acting force required by deformation of the anti-falling elastic sheet is favorably improved, so that the anti-falling capacity of the pin shaft is improved.
Further: the groove is a flat bottom groove.
Has the advantages that: by adopting the technical scheme, the groove can be processed more conveniently.
Further: the anti-falling elastic sheet is fixed on the end face of the penetrating end of the pin shaft main body; the passing-out end of the pin shaft main body is provided with an avoiding groove, and the avoiding groove is used for providing an avoiding 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.
Has the advantages 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 the avoiding groove is in a right trapezoid shape, the groove bottom wall of the avoiding groove comprises a straight section and an inclined section, one end of the straight section extends to the end face of the penetrating end of the pin shaft main body, the other end of the straight section is connected with the inclined section, and one end, far away from the straight section, of the inclined section is compared with the head, close to the pin shaft main body, of the other end of the inclined section.
Has the advantages that: adopt above-mentioned technical scheme to be favorable to reducing the extension length who dodges the groove, avoid influencing the joint strength of round pin axle from this.
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.
Has the advantages that: adopt above-mentioned technical scheme simple structure, the processing of being convenient for also is convenient for change impaired anticreep shell fragment.
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 and 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, one end of the pin shaft main body is a penetrating end which is 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 part; the pin shaft for the circuit breaker further comprises an anti-falling elastic sheet, 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 matched with a to-be-connected piece in a blocking mode 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 body under the reverse thrust action of the edge of the pin shaft insertion side opening 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 the pin shaft into the pin shaft hole; and the pin shaft is also used for swinging towards the penetrating end of the pin shaft main body under the reverse thrust action of the pin shaft penetrating out of the 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.
Has the beneficial effects that: by adopting 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 being separated from the pin shaft hole on the part to be connected, meanwhile, the elastic deflection part can elastically deflect, 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 inserting side of the pin shaft hole, compared with the prior art, a split pin or an elastic retainer ring is not required to be installed, the anti-falling elastic sheet can be better applied to the occasion of space, the anti-falling elastic sheet is fixedly connected to the penetrating end of the pin shaft main body through a fixed end, the structure is simple, the large deflection deformation can be realized, the smooth installation of the pin shaft is convenient, and the assembly and disassembly maintenance efficiency is improved, the cost is reduced.
Further, the method comprises the following steps: the outer peripheral face 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 groove bottom wall of the groove.
Has the advantages that: adopt above-mentioned technical scheme be convenient for setting of anticreep shell fragment to the recess can provide the beat space for elasticity beat part, also is convenient for simultaneously adjust the overhanging length of elasticity beat part through the degree of depth of recess, controls the deformation degree of difficulty of anticreep shell fragment.
Further: the anti-falling elastic sheet comprises a supporting part and an overhanging 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 is bent 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 peripheral surface of the pin shaft main body; the resilient deflection portion is formed by an overhanging portion.
Has the advantages that: by adopting the technical scheme, 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 convenient when the pin shaft is installed.
Further: and a space is formed between the fixing part between the supporting part and the pin shaft main body and the supporting part, and the part of the supporting part corresponding to the space is used for bending and deforming in the process of separating the pin shaft from the pin shaft hole.
Has the advantages that: adopt above-mentioned technical scheme to be favorable to inserting the later stage that the side forces the round pin axle of taking out the round pin axle at the round pin axle in round pin axle hole and make the anticreep shell fragment bending deformation more easily, convenient to detach also can avoid leading to the anticreep shell fragment impaired when dismantling better.
Further: one end of the groove penetrates through the end face of the penetrating end of the pin shaft main body along the axial direction of the pin shaft main body.
Has the advantages that: adopt above-mentioned technical scheme be convenient for the processing of recess, also can provide bigger deformation space for the anticreep shell fragment.
Further: the overhanging portion extends obliquely toward the head of the pin shaft main body.
Has the advantages that: by adopting the technical scheme, the acting force required by deformation of the anti-falling elastic sheet is favorably improved, so that the anti-falling capacity of the pin shaft is improved.
Further: the groove is a flat bottom groove.
Has the beneficial effects that: by adopting the technical scheme, the groove can be processed more conveniently.
Further: the anti-falling elastic sheet is fixed on the end face of the penetrating end of the pin shaft main body; the passing-out end of the pin shaft main body is provided with an avoiding groove, and the avoiding groove is used for providing an avoiding 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.
Has the beneficial effects that: by adopting the technical scheme, the processing and the installation of the anti-falling elastic sheet can be conveniently realized.
Further, the method comprises the following steps: dodge the groove the longitudinal section be right trapezoid, dodge the tank bottom wall in groove including straight section and slope section, the one end of straight section extends to the terminal surface of the end of wearing out of round pin axle main part, 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 is compared in the head that the other end is more close to round pin axle main part.
Has the beneficial effects that: adopt above-mentioned technical scheme to be favorable to reducing the extension length who dodges the groove, avoid influencing the joint strength of round pin axle from this.
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.
Has the advantages that: adopt above-mentioned technical scheme simple structure, the processing of being convenient for also is convenient for change impaired anticreep shell fragment.
Drawings
FIG. 1 is a schematic structural view of an embodiment 1 of an arc extinguishing chamber in 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 a pin shaft for a circuit breaker according to embodiment 1 of 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 a circuit breaker according to the present invention;
Figure 6 is a schematic diagram of the structure of one embodiment of the circuit breaker of the present invention;
FIG. 7 is an enlarged view of a portion of the crank case of FIG. 6;
fig. 8 is a plan view of the connection of the inner and outer crank arms to the respective parts at the crank case.
The names of the components corresponding to the corresponding reference numerals in the drawings are: 10. a pin shaft body; 11. a piercing-out end; 12. a head portion; 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 insulation pull rod; 102. a movable end cover; 103. a guide bar; 104. a moving end assembly; 105. a support cylinder; 106. an operation hole; 201. a support; 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. and (4) insulating the pull rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of 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 present invention, 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 derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is to be noted that, in the embodiments of the present invention, relational terms such as "first" and "second", and the like, which may be present in the terms of the first and second, 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. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, 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 appearances of the phrase "comprising an … …" or similar limitation may be present without necessarily excluding the presence of additional identical elements in the process, method, article, or apparatus that comprises the same elements.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Example 1 of the arc chute of the invention:
as shown in fig. 1 and 2, the arc extinguish 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 insulating pull rod 101, pin shaft holes are formed in the movable end insulating pull rod 101 and the guide rod 103, the movable end insulating pull rod 101 and the guide rod 103 are connected through a pin shaft, a connecting part is located 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 peripheral surface of the supporting cylinder 105. The pin is a pin for a circuit breaker as shown in fig. 3 and 4, is used for being inserted into a pin hole 41 of a to-be-connected component 40 (i.e. a moving-end insulating pull rod 101 and a guide rod 103 in this embodiment), and comprises a pin body 10 and an anti-dropping elastic sheet 20.
The pin shaft body 10 is a cylindrical structure, one end of the pin shaft body is a penetrating end 11 used for penetrating out of the piece to be connected 40 when in use, and the other end of the pin shaft body is a head 12. The 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 shaft body 10, penetrates through the end surface of the through end 11 of the pin shaft body 10 along the axial direction of the pin shaft 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, retaining spring 20 is a V-shaped structure including 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 connecting position of the two is in arc transition. The bottom surface of the support portion 21 is supported on the groove bottom wall of the groove 13, and the end thereof is provided with a fixing hole forming a fixing end, and is fixed to the pin shaft body 10 by a screw 23 penetrating through the fixing hole. The fixing hole constitutes a fixing portion of the support portion 21 with a space therebetween, 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 shaft from the pin shaft hole 41.
The supporting part 21 extends along the axis of the pin shaft body 10, the overhanging part is arranged at one end of the supporting part 21 close to the head part 12 of the pin shaft body 10, and is bent towards the radial outer side of the pin shaft body 10 relative to the supporting part 21 to form an inclined structure, one end of the overhanging part far away from the supporting part 21 is closer to the head part 12 of the pin shaft body 10 than the other end, and the tail end protrudes out of the outer peripheral surface of the pin shaft body 10.
In the process of inserting the pin shaft into the pin shaft hole 41, the elastic swing part 22 formed by the overhanging part is used for swinging towards the head part 12 of the pin shaft body 10 by the reverse thrust of the pin shaft inserting side opening of the pin shaft hole 41 until entering the cylindrical surface range corresponding to the cross section of the pin shaft hole 41; in the process of separating the pin shaft from the pin shaft hole 41, the elastic deflecting portion 22 is used for being pushed back by the pin shaft passing side opening of the pin shaft hole 41 to swing towards the passing end 11 of the pin shaft body 10 until entering the cylindrical range corresponding to the cross section of the pin shaft hole 41.
In use, the pin is inserted into the pin hole 41 of the member to be connected 40 in the installation direction corresponding to the arrow shown in fig. 4. Along with the increase of the insertion depth of the pin shaft, the anti-dropping elastic sheet 20 contacts with the pin shaft insertion side opening edge of the pin shaft hole 41, the insertion force of the pin shaft is increased at this time, and the elastic deflection part 22 of the anti-dropping elastic sheet 20 swings towards the head part 12 of the pin shaft main body 10 under the reverse thrust action of the pin shaft insertion side opening edge of the pin shaft hole 41 until the elastic deflection part enters 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 restriction of the hole 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 to restore to the natural state, and forms axial stop matching with the side surface of the penetrating side of the pin shaft hole 41, so that the pin shaft can be prevented from being separated from the pin shaft hole 41, and the pin shaft is installed in place.
Certainly, the anti-falling elastic sheet 20 needs to be elastically deformed to meet installation requirements, so that the rigidity is limited, and the anti-falling acting force which can be formed is also limited, so that the pin shaft is suitable for the working condition of no axial load or light load. Preferably, in the present embodiment, the anti-dropping elastic sheet 20 is made of spring steel such as 65Mn or 70Mn, or may be made of 50# carbon steel or 50# strip steel. Of course, according to the use 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.
During disassembly, the anti-falling elastic sheet 20 can be pressed manually, 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 the anti-dropping elastic sheet 20 is inconveniently pressed from the penetrating side of the pin shaft hole 41, the pin shaft can be forcibly pulled out from the inserting side of the pin shaft hole 41, and in the pulling process, under the reverse pushing action of the pin shaft hole 41 penetrating out of the side opening edge, the elastic deflection part 22 of the anti-dropping elastic sheet 20 swings towards the penetrating end 11 of the pin shaft main body 10 to form bending and enter the cylindrical surface range corresponding to the cross section of the pin shaft hole 41. At this time, the support portion 21 of the anti-falling elastic piece 20 can swing towards the notch side of the groove 13 at the same time, which is more favorable for the elastic deflection portion 22 to enter the cylindrical 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 shaft in this embodiment is not suitable for being disassembled and assembled for many times.
Example 2 of an arc chute of the invention:
the present embodiment is different from embodiment 1 in that: in embodiment 1, the pin shaft body 10 is provided with a groove 13, and the anti-falling elastic sheet 20 is disposed in the groove 13. In this embodiment, as shown in fig. 5, a threaded hole 31 is formed in an end surface of the penetrating end 11 of the pin shaft main body 10, the anti-falling elastic sheet 20 is a straight elastic sheet, and a fixing hole is formed in one end of the anti-falling elastic sheet to form a fixing end, and the fixing end is fixed to a portion, close to the outer peripheral surface, of the end surface of the pin shaft main body 10 by a screw 23. Meanwhile, the passing-out end 11 of the pin shaft main body 10 is provided with an avoiding groove 32, and the avoiding groove 32 is used for providing an avoiding 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 avoiding groove 32 is a right trapezoid, the bottom wall of the 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, far away from the straight section 33, of the inclined section 34 is closer to the head 12 of the pin shaft main body 10 than the other end of the inclined section.
During the round pin axle in dismouting embodiment 2, can adopt the similar mode with the embodiment, however, no matter be the installation round pin axle or dismantle the round pin axle, the anti-disengaging shell fragment 20 of straight structure all only need the less angle of swing, and fatigue resistance is better, consequently can adapt to the condition that needs dismouting many times better. Of course, the pin shaft in embodiment 1 can provide a larger retaining force than that in embodiment 2.
Example 3 of an arc chute of the invention:
the present embodiment is different from embodiment 1 in that: in embodiment 1, the overhanging portion of the retaining spring 20 is arranged obliquely toward the head portion 12 of the pin main body 10. In this embodiment, the extending direction of the overhanging portion of the anti-falling elastic sheet 20 is perpendicular to the axis of the pin shaft body 10.
Example 4 of the arc chute of the invention:
the present embodiment is different from embodiment 1 in that: in embodiment 1, the anti-falling elastic sheet 20 is fixed on the pin shaft body 10 by a screw 23, so as to be convenient for replacement. In this embodiment, the anti-falling elastic sheet is welded and fixed on the pin shaft body 10. In other embodiments, the anti-dropping elastic sheet can also adopt other fixing modes, such as riveting.
Example 5 of the arc chute of the invention:
the present embodiment is different from embodiment 1 in that: in embodiment 1, one end of the groove 13 for accommodating the anti-falling elastic piece 20 on the pin shaft body 10 penetrates through the end surface of the through end 11 of the pin shaft body 10 along the axial direction of the pin shaft body 10. In this embodiment, both ends of the groove 13 in the length direction are closed structures, and one end of the groove 13 away from the head 12 of the pin shaft body 10 is provided with an avoiding section for avoiding and deflecting the elastic deflection part 22 in a cylindrical surface range corresponding to the cross section of the pin shaft hole 41.
Example 6 of the arc chute of the invention:
the present embodiment is different from embodiment 1 in that: in embodiment 2, the bypass groove 32 includes a straight section 33 and an inclined section 34. In the present embodiment, the evacuation groove 32 has a flat bottom structure, and is similar in shape to 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 inclined.
In the above embodiment, the anti-falling elastic sheet 20 is provided with only one position, and in other embodiments, more than two anti-falling elastic sheets 20 may be provided along the circumferential direction.
Embodiments 1 to 6 of the pin shaft for circuit breaker according to the present invention:
the pin for the circuit breaker, i.e. the pin for the circuit breaker described in any of the embodiments of the arc chute described above, will not be described again here.
Embodiment 1 of the circuit breaker in the present invention:
the circuit breaker in this embodiment is a column circuit breaker, as shown in fig. 6 and 7, and includes a bracket 201, a crank arm 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 crank arm 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 the moving end of the arc extinguish chamber 205 to move through the crank arm box 203, so that the opening and closing of the circuit breaker are realized. As shown in fig. 8, the crank arm case 203 includes an outer crank arm 206 and an inner crank arm 207, the outer crank arm 206 and the inner crank arm 207 are fixed to a crank arm shaft 208, and the crank arm shaft 208 is rotatably fitted to a bearing seat provided on a case body of the crank arm case 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 the 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 movable contact (not shown in the figure) of the arc extinguish chamber 205, the insulating pull rod 211 is arranged along the up-down direction and penetrates through the insulating support 204, and the upper end and the lower end of the insulating pull rod are respectively hinged with the inner crank arm 207 and a guide rod fixed on the movable contact. When the circuit breaker acts, the operating mechanism 202 drives the outer connecting lever 206 to swing through the driving connecting rod 209, and further drives the inner connecting lever 207 to swing, and finally, the moving contact of the arc extinguish chamber 205 acts. The above structure is a common form of existing circuit breaker and will not be described in detail here. The difference from the prior art is that the driving connecting rod 209 is hinged with the outer crank arm 206 through the pin shaft in the embodiment 1 of the pin shaft for the circuit breaker, the hinged part is positioned at the side of 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 comprises a pin 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. Because the distance between the outer crank arm 206 and the corresponding side wall of the crank arm box 203 is limited, a cotter pin or an elastic retainer ring is difficult to install through a tool, and by adopting the pin shaft for the circuit breaker, the operation can be carried out from one side of the outer crank arm 206, which is far away from the corresponding side wall of the crank arm box 203, and the disassembly and the assembly are convenient. Of course, in other embodiments, the pin between the driving link 209 and the outer crank arm 206 may be the same as the pin described in the other embodiments of the pin for the circuit breaker.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims (10)

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 mode 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 of the pin shaft main body is a head portion (12); the pin shaft for the breaker is characterized by further comprising an anti-falling elastic sheet (20), wherein the anti-falling elastic sheet (20) is provided with a fixed end and an elastic deflection part (22), and the fixed end is fixedly connected to a 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) in a blocking mode along the axial direction 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 reverse thrust action of the edge of the pin shaft insertion side opening of the pin shaft hole (41) in the process of inserting the pin shaft into the pin shaft hole (41) and entering the cylindrical surface range corresponding to the cross section of the pin shaft hole (41); and the pin shaft swinging mechanism is also used for swinging towards the penetrating end (11) of the pin shaft main body (10) under the reverse thrust action of the pin shaft penetrating side opening edge of the pin shaft hole (41) to enter the cylindrical surface range corresponding to the cross section of the pin shaft hole (41) in the process of separating the pin shaft from the pin shaft hole (41).
2. The pin shaft for a circuit breaker according to claim 1, wherein a groove (13) is formed on the outer peripheral surface of the penetrating end (11) and used for accommodating the anti-dropping elastic sheet (20), and the anti-dropping elastic sheet (20) is fixed on the bottom wall of the groove (13).
3. The pin for the circuit breaker according to claim 2, wherein the anti-release resilient piece (20) comprises a support portion (21) having a bottom surface supported on the bottom wall of the groove (13), and further comprises an overhanging portion provided at an end of the support portion (21) near the head portion (12) of the pin body (10), the overhanging portion being bent radially outward of the pin body (10) with respect to the support portion (21), and having a distal end protruding beyond the outer peripheral surface of the pin body (10); the resilient deflection portion (22) is formed by an overhanging portion.
4. The pin for circuit breakers according to claim 3, characterized in that the fixing point between said supporting portion (21) and the pin body (10) is spaced from said supporting portion (21), the portion of the supporting portion (21) corresponding to said spacing being adapted to be bent and deformed during the detachment of the pin from the pin hole (41).
5. A pin for circuit breakers according to any one of claims 1 to 4, characterized in that said elastic deflector portion (22) extends obliquely towards the head (12) of the pin body (10).
6. A pin for circuit breakers according to any of the claims 2 to 4, characterized in that said recess (13) is a flat bottom groove.
7. The pin shaft for the circuit breaker according to claim 1, wherein the anti-drop elastic sheet (20) is fixed on the end surface of the penetrating end (11) of the pin shaft main body (10); the anti-falling elastic piece is characterized in that an avoiding groove (32) is formed in a penetrating end (11) of the pin shaft main body (10), the avoiding groove (32) is used for providing an avoiding space for the anti-falling elastic piece (20) swinging towards the falling-off direction of the pin shaft, and the anti-falling elastic piece (20) enters the cylindrical surface range corresponding to the cross section of the pin shaft hole (41).
8. The pin for the circuit breaker according to claim 7, wherein the longitudinal section of the avoiding groove (32) is a right trapezoid, the bottom wall of the avoiding groove (32) comprises a straight section (33) and an inclined section (34), one end of the straight section (33) extends to the end surface of the through end (11) of the pin body (10), the other end is connected with the inclined section (34), and one end of the inclined section (34) far from the straight section (33) is closer to the head (12) of the pin body (10) than the other end.
9. The arc extinguish chamber comprises a movable end cover (102), a guide rod (103) is assembled on the movable end cover (102) in a guiding mode, the guide rod (103) is connected with a movable end insulating pull rod (101), pin shaft holes are formed in the movable end insulating pull rod (101) and the guide rod (103) and connected through a pin shaft, a connecting part is located 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 peripheral surface of the supporting cylinder (105); the method is characterized in that: the pin is used as a pin for a circuit breaker according to any one of claims 1 to 8.
10. 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 on 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 the circuit breaker is characterized in that the pin is the pin for the circuit breaker in any one of claims 1 to 8.
CN202210195382.2A 2021-12-20 2022-03-01 Pin shaft for circuit breaker, arc extinguishing chamber using pin shaft and circuit breaker Active CN114678237B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111566999 2021-12-20
CN2021115669992 2021-12-20

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CN114678237B CN114678237B (en) 2024-05-17

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CN111816499A (en) * 2020-08-13 2020-10-23 兰姆达电气技术（苏州）有限公司 High-voltage vacuum circuit breaker
CN212985691U (en) * 2020-06-15 2021-04-16 恒昌行精密工业有限公司 Lock catch structure of handle
CN113120022A (en) * 2019-12-30 2021-07-16 常州中车铁马科技实业有限公司 Tread brake

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN209670590U (en) * 2018-09-27 2019-11-22 郑州宇通客车股份有限公司 Latch and the vehicle for using the latch
CN111341606A (en) * 2018-12-18 2020-06-26 天津平高智能电气有限公司 Circuit breaker and operating mechanism thereof
CN210245399U (en) * 2019-09-25 2020-04-03 西电宝鸡电气有限公司 Vacuum circuit breaker with guiding device
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