WO2016173462A1 - 断路器的操作机构的熔焊隔离机构 - Google Patents

断路器的操作机构的熔焊隔离机构 Download PDF

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Publication number
WO2016173462A1
WO2016173462A1 PCT/CN2016/079965 CN2016079965W WO2016173462A1 WO 2016173462 A1 WO2016173462 A1 WO 2016173462A1 CN 2016079965 W CN2016079965 W CN 2016079965W WO 2016173462 A1 WO2016173462 A1 WO 2016173462A1
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WO
WIPO (PCT)
Prior art keywords
assembly
side plate
operating mechanism
spindle
component
Prior art date
Application number
PCT/CN2016/079965
Other languages
English (en)
French (fr)
Inventor
孙吉升
李勇
Original Assignee
上海电科电器科技有限公司
浙江正泰电器股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海电科电器科技有限公司, 浙江正泰电器股份有限公司 filed Critical 上海电科电器科技有限公司
Priority to PL16785893T priority Critical patent/PL3291274T3/pl
Priority to ES16785893T priority patent/ES2776274T3/es
Priority to RU2017140338A priority patent/RU2699386C2/ru
Priority to US15/569,431 priority patent/US10332715B2/en
Priority to EP16785893.5A priority patent/EP3291274B1/en
Publication of WO2016173462A1 publication Critical patent/WO2016173462A1/zh

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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
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/62—Manual reset mechanisms which may be also used for manual release with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/1054—Means for avoiding unauthorised release
    • 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
    • H01H71/10—Operating or release mechanisms
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/521—Details concerning the lever handle
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/62—Manual reset mechanisms which may be also used for manual release with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement
    • H01H71/64—Manual reset mechanisms which may be also used for manual release with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement incorporating toggle linkage
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
    • H01H2071/502—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker with direct contact between manual operator and welded contact structure

Definitions

  • the present invention relates to the field of low voltage electrical appliances, and more particularly to an operating mechanism for a switchgear.
  • the circuit breaker is the main protection switch in the low-voltage distribution network.
  • the circuit breaker provides overload and short-circuit protection for the line.
  • a plastic case circuit breaker is one of them, and a large-capacity molded case circuit breaker refers to a circuit breaker with a rated current of 800A or more.
  • the circuit breaker is usually a three-pole and four-pole structure, that is, the circuit breaker has three groups or four. Group contacts, corresponding to three-phase or four-phase circuits.
  • the operating mechanism is simultaneously connected with the three or four sets of contacts, and the three or four sets of contacts are simultaneously closed, opened or tripped by operating the operating mechanism.
  • the contacts may be welded, which means that the moving and stationary contacts melt due to high temperatures and are therefore not connected together. Since the operating mechanism and the contact are interlocked, when the movable contact and the fixed contact are welded and cannot be separated, the operating mechanism cannot operate. Since the fusion welding usually occurs when the circuit is turned on, the operating mechanism is locked in the closing position. At this time, if there is an external force, such as manpower to open the operating mechanism, it will cause damage to the operating mechanism.
  • the present invention is directed to a fusion welding isolation mechanism capable of limiting the stroke of an operating mechanism to protect an operating mechanism in the event of fusion welding.
  • a welding isolation mechanism for an operating mechanism of a circuit breaker comprising: a trip assembly, a left side plate assembly, a right side plate assembly, a lock assembly, and a half shaft Components, lever assemblies and spindle assemblies.
  • the jumper assembly, the latch assembly and the lever assembly are mounted between the left side plate assembly and the right side plate assembly, the half shaft assembly and the spindle assembly extending through the left side plate assembly and the right side plate assembly and extending to the left side plate assembly and the right side outside the board assembly.
  • Jumper assembly, lock The buckle assembly, the half shaft assembly, the lever assembly and the spindle assembly are linked.
  • the lever assembly and the spindle assembly have an isolating device, and the isolating device limits the operating handle when the moving contact is welded, so that the operating handle cannot be opened.
  • the spindle assembly includes a spindle having a plurality of cantilevers thereon, the spindle further having a spindle limit member, and the spindle limit member has a limit block thereon.
  • the lever assembly includes a sheet metal bending member, the sheet metal bending member is bent to form a top wall and two side walls, and the lever assembly spring is mounted on the sheet metal bending member, and the lever assembly spring is folded by the gold Surrounded by the curved member, the sheet metal bending member forms a shallow hook-shaped extension at the first end of the bottom of the two side walls.
  • the spacer means is formed by a stop block on the spindle stop and a shallow hook-shaped extension on the sheet metal bend.
  • the spindle assembly interlocked with the moving contact is locked in the closing position and cannot be rotated.
  • the spindle limiting member is The limit block is in contact with the shallow hook-shaped extension on the sheet metal bending member so that the lever assembly cannot reach the opening position.
  • the lever assembly spring after the external force disappears, the lever assembly spring generates a torque to rotate the lever assembly to the closing direction.
  • the welding isolation mechanism of the operating mechanism of the circuit breaker of the present invention can limit the stroke of the operating mechanism to the opening direction when the moving contact is welded, so as to protect the operating mechanism from being damaged by forced operation. After the external force disappears, the operating mechanism can reset itself to the closing position.
  • Fig. 1 is a view showing the construction of an operating mechanism of a circuit breaker using a fusion welding isolation mechanism according to an embodiment of the present invention.
  • FIG. 2a and 2b show a structural view of a trip unit in the operating mechanism of the circuit breaker shown in Fig. 1.
  • Figure 3a discloses a block diagram of the left side panel assembly and the latch assembly of the operating mechanism of the circuit breaker of Figure 1.
  • Figure 3b reveals the structural view of the left side panel assembly and the latch assembly from another perspective.
  • Figure 4a discloses a block diagram of a first embodiment of a latch assembly.
  • Figure 4b discloses a block diagram of a second embodiment of the latch assembly.
  • Figure 5 is a block diagram showing the structure of the right side panel assembly in the operating mechanism of the circuit breaker shown in Figure 1.
  • Figures 6a and 6b show a structural view of the lever assembly in the operating mechanism of the circuit breaker shown in Figure 1.
  • Figures 7a and 7b show a structural view of the spindle assembly in the operating mechanism of the circuit breaker shown in Figure 1.
  • Fig. 9 is a view showing the assembly structure of the operating mechanism and the circuit breaker of the circuit breaker shown in Fig. 1.
  • Figures 10a and 10b illustrate the process of the operating mechanism shown in Figure 1 for moving the movable contact to close.
  • Figures 11a and 11b illustrate the process of the operating mechanism shown in Figure 1 for moving the movable contact to open.
  • Figures 12a and 12b illustrate a block diagram of an operating mechanism for conducting a weld isolation indication in accordance with an embodiment of the present invention.
  • Figure 1 discloses a block diagram of an operating mechanism of a circuit breaker in accordance with an embodiment of the present invention.
  • the operating mechanism 107 includes a trip assembly 100, a left side panel assembly 101, a latch assembly 102, a half shaft assembly 103, a right side panel assembly 104, a lever assembly 105, and a spindle assembly 106.
  • Figures 2a and 2b show the structural diagram of the jumper assembly.
  • the jumper assembly 100 includes a snap button 204.
  • the first end of the jumper 204 has a first hole 207, and the rotating shaft 208 is riveted. Connected to the first hole 207.
  • the middle portion of the jumper 204 has a pin hole, and the pin 203 passes through the pin hole to rive the upper link 201 to the jumper 204.
  • the second end of the jumper 204 has a hook shape, the inner side of the hook shape forms a first inclined surface 256, and the outer side of the hook shape forms a second inclined surface 253. It should be noted that although 253 is the second slope, the "bevel" is actually a circular arc shape, or at least a part of the circular arc surface.
  • the upper end of the upper link 201 is riveted to the jumper 204.
  • the middle of the upper link 201 has a pin hole.
  • the pin 203 passes through the pin hole and the lower link 202 is riveted to the upper link 201.
  • the lower end of the upper link 201 has a connection hole 236. As shown in FIG. 2b, the lower end of the lower link 202 has a connecting hole 283 through which the lower pin 202 is riveted to the upper link 201, and the lower end of the lower link 202 has a connecting hole 282.
  • the side panel assembly includes a left side panel assembly 101 and a right side panel assembly 104.
  • the left side panel assembly 101 and the right side panel assembly 104 have a symmetrical structure.
  • the jumper assembly 100, the latch assembly 102, the axle assembly 103, the lever assembly 105, and the spindle assembly 106 are all located between the left side panel assembly 101 and the right side panel assembly 104.
  • both ends of the latch assembly 102, the half shaft assembly 103, the lever assembly 105, and the spindle assembly 106 are mounted on the left side panel assembly 101 and the right side panel assembly 104, respectively.
  • Figures 3a and 3b illustrate the structure of the left side panel assembly, with Figures 3a and 3b revealing the structure of the left side panel assembly from different angles, respectively.
  • the left side panel assembly 101 includes a left side panel 209.
  • the left side plate 209 forms a bent hole 210 at a position near the bottom near the both ends, and the bent hole 210 includes an extending plate perpendicular to the side plate 209, and a hole opened in the extending plate.
  • a nut 211 is riveted to the bent hole 210.
  • the bent hole 210 and the nut 211 are used to mount the operating mechanism 107 to the circuit breaker.
  • the left side plate 209 has a mounting hole 212 at a position near the bottom in the middle, the mounting hole 212 is for mounting the rotating shaft 213, the rotating shaft 213 is a rotating shaft of the lever assembly 105, and the lever assembly 105 is rotated about the rotating shaft 213.
  • the rotating shaft 213 is a short shaft, and the rotating shaft 213 has an end cover at an end portion facing the inner side of the left side plate 209.
  • the left side plate 209 has a mounting hole 215 at a position near the top of the second end, and the rotating shaft 217 of the locking assembly 102 is mounted in the mounting hole 215 to mount the locking assembly 102 to the left side plate assembly 101.
  • the left side plate 209 is near the bottom at the second end The position has a semi-shaft bore 226 for assembling the axle assembly 103.
  • the left side plate 209 has a semi-circular notch 299 at a position near the bottom of the first end, the notch 299 is for receiving the spindle assembly 106, and above the notch 299 is a mounting hole 290 for the spindle assembly 106.
  • the screws are fixed.
  • the left side plate 209 has a jumper mounting hole 280 at a position near the top of the first end, and the jumper mounting hole 280 is for receiving the rotating shaft 208 of the jumper assembly 100.
  • Figure 5 discloses a structural view of the right side panel assembly.
  • the right side plate assembly 104 and the left side plate assembly 101 have a symmetrical structure, and the right side plate 309 has a bent hole 310 symmetric with the left side plate 209, a nut 311, a mounting hole 312 for mounting the rotating shaft 213, and a lock for mounting the lock Mounting holes 315 of the rotating shaft 217 of the buckle assembly 102, a semi-axle hole 227 for assembling the half-shaft assembly 103, a semi-circular notch 399 for accommodating the spindle assembly 106, and a mounting hole for fixing the screw of the spindle assembly 106 291.
  • a jumper mounting hole 281 for receiving the rotating shaft 208 of the jumper assembly 100.
  • the latch assembly 102 includes a sheet metal member 219, a positioning shaft 220, a bearing 221, a lock assembly spring 222, and a rotating shaft 217.
  • Figures 3a and 3b mainly referring to Figure 3b, it should be noted that in order to more clearly express the mounting structure of the latch assembly 102, Figures 3b and 3a reveal the side panel assembly 101 with two different angles.
  • the locking assembly 102, Figure 3b more clearly discloses the mounting structure of the locking assembly.
  • Figure 4a illustrates the construction of the sheet metal member 219, the positioning shaft 220 and the bearing 221 in the latch assembly.
  • the sheet metal member 219 includes two sheets of sheet metal having the same shape, and the two sheets of sheet metal are disposed at intervals.
  • the two positioning shafts 220 fix the two sheet metal sheets to form the sheet metal member 219.
  • the bearing 221 is sandwiched between two sheet metal pieces, and both ends of the bearing 221 are respectively mounted on a sheet metal piece.
  • the bearing 221 is located between the two positioning shafts 220.
  • the upper end of the sheet metal member 219 has a shaft hole through which the sheet metal member 219 is mounted on the rotating shaft 217, and the sheet metal member 219 is rotatable about the rotating shaft 217.
  • the rotating shaft 217 is also covered with a locking assembly spring 222, and the locking assembly spring 222 is also sandwiched between two sheet metal pieces.
  • the bearing 221 mates with the second ramp 253 of the jumper assembly 100 such that the striker assembly 102 can limit the jumper assembly 100.
  • Figure 4b illustrates a structural view of another embodiment of the latch assembly.
  • the sheet metal member 219A includes two sheet metal sheets of inconsistent shape, wherein a sheet of sheet metal has bent legs thereon. There is no bent foot on the other sheet metal piece, and the two sheet metal pieces also have holes through which the common rotating shaft 217 passes. Two pieces of sheet metal are set at regular intervals. And by the piece-like parts connected, the positioning axis is no longer used.
  • the sheet metal member 219A is a single member including a sheet portion and two sheet metal sheets joined by the sheet portion.
  • the bearing 221A is sandwiched between two sheet metal sheets.
  • the axle assembly 103 includes a half shaft 223. Both ends of the half shaft 223 are respectively mounted in the half shaft holes 226 on the side plates 209 of the left side plate assembly 101, and in the half shaft holes 227 on the side plates 209 of the right side plate assembly 104.
  • the half shaft assembly 103 has two fault receiving members, a first fault receiving member 224 and a second fault receiving member 225.
  • the first fault receiving member 224 and the second fault receiving member 225 are both located between the left side plate assembly 101 and the right side plate assembly 104, wherein the first fault receiving member 224 is disposed near the inner side of the side plate of the left side plate assembly 101, and second The fault receiving member 225 is disposed adjacent to the inner side of the side panel of the right side panel assembly 104.
  • the axle assembly 103 and the latch assembly 102 together form a secondary latch of the operating mechanism.
  • FIGS. 6a and 6b show a structural view of the lever assembly.
  • the lever assembly 105 includes a sheet metal bend 228 that is bent to form a top wall and two side walls, the top wall and the two side walls forming a half-surrounded structure.
  • a mounting shaft 229 is riveted to the top wall of the sheet metal bending member 228 for mounting the operating handle 230.
  • the sheet metal bending member 228 has a mounting groove 233 at the boundary between the top wall and the two side walls.
  • a spring mounting shaft 232 is mounted between the two mounting slots 233.
  • the upper end of the lever assembly spring 231 is coupled to the spring mounting shaft 232. In the illustrated embodiment, two lever assembly springs 231 are juxtaposed.
  • the lever assembly spring 231 is surrounded by the sheet metal bend 228.
  • the lower end of the lever assembly spring 231 has a connecting hole 234 which is aligned with the connecting hole 236 at the lower end of the upper link 201.
  • the connecting shaft 235 passes through the connecting hole 234 and the connecting hole 236 such that the lever assembly spring 231 is coupled to the upper link 201 of the trip unit 100 such that the lever assembly 105 is interlocked with the trip unit 101.
  • the sheet metal bend 228 forms a shallow hook-shaped extension 258 at the first end of the bottom of the two side walls, the shallow hook-shaped extension 258 having a "boot"-like shape.
  • the shallow hook-shaped extension 258 acts to limit the rotation of the lever assembly 105.
  • the sheet metal bending member 228 is formed with a semicircular notch 241 at a position near the second end of the bottom side of the two side walls, and the semicircular notch 241 is for accommodating the rotating shaft 213.
  • the lever assembly 105 rotates about the rotation shaft 213.
  • FIG. 7a and 7b show a structural view of the spindle assembly.
  • Spindle assembly 106 includes a main shaft 237.
  • the plurality of cantilevers 238 respectively correspond to the moving contact assemblies of the plurality of poles, or corresponding to the multi-phase circuit.
  • Each cantilever 238 has a connecting hole therein.
  • the spindle 237 also has a pair of spindle stops 239 and 240.
  • the pair of spindle stops 239 and 240 are disposed on either side of one of the plurality of cantilevers 238, and the positions of the pair of spindle stops 239 and 240 on the spindle 237 are symmetrical with respect to the cantilever 238.
  • the spindle stops 239 and 240 correspond to one of the phase circuits.
  • the ends of the spindle stops 239 and 240 have a bent stop block 259 that can cooperate with the shallow hook-shaped extension 258 of the "boot" shape on the sheet metal bend 228.
  • the spindle assembly 106 is utilized to limit the range of rotation of the lever assembly 105.
  • Figure 7b shows the mounting assembly for the spindle assembly.
  • the mounting accessory includes two parts: a first portion 242 and a second portion 243.
  • the first portion 242 and the second portion 243 are a single unit.
  • the first portion 242 defines a circular aperture having a diameter that matches the spindle 237 through which the spindle 237 passes.
  • the second portion 243 is located above the first portion 242 and has a threaded bore in the second portion 243.
  • a mounting fitting is mounted on each of the left side panel assembly 101 and the right side panel assembly 104.
  • the holes in the first portion 242 are aligned with semi-circular notches 299 or 399, respectively, for receiving the spindle 237.
  • the screw holes on the second portion 243 are respectively aligned with the mounting holes 290 or the mounting holes 291 through which the screws pass, and the mounting fittings are mounted to the left side plate assembly and the right side plate assembly together with the main shaft.
  • the jumper assembly 100, the left side panel assembly 101, the latch The assembly 102, the axle assembly 103, the right side panel assembly 104, the lever assembly 105, and the spindle assembly 106 are assembled into the operating mechanism 107 in the following manner.
  • the two ends of the rotating shaft 208 of the jumper assembly 100 are respectively mounted on the jumper mounting holes 280 of the left side plate assembly 101 (on the left side plate 209) and the jumper mounting holes 281 of the right side plate assembly 104 (located on the right side plate 309). on).
  • the semicircular notches 241 at the bottoms of the side walls of the sheet metal bending members 228 of the lever assembly 105 are respectively mounted on the rotating shaft 213 of the left side plate assembly 101 and the right side plate assembly 104.
  • the rotating shaft 213 is a short shaft
  • the two rotating shafts 213 are respectively mounted on the left side plate 209 and the right side plate 309
  • the end portion of the rotating shaft 213 facing the inner side has an end cover
  • the diameter of the end cover is larger than the rotating shaft
  • the end cover The side walls of the sheet metal bending member 228 are laterally constrained.
  • the connecting hole 234 at the bottom of the lever assembly spring 231 in the lever assembly 105 is aligned with the connecting hole 236 at the lower end of the upper link 201, and the connecting shaft 235 passes through the connecting hole 234 and the connecting hole 236 to connect the lever assembly spring 231 with the upper link 201.
  • the main shaft 237 of the spindle assembly 106 passes through a hole in the first portion 242 of the two mounting fittings such that the spindle 237 is coupled to the two mounting fittings.
  • the spindle 237 is placed into the semi-circular notch 299 of the left side plate assembly 101 (on the left side plate 209) and the semi-circular notch 399 of the right side plate assembly 104 (on the right side plate 309), two mounting fittings
  • the screw holes on the second portion 243 are respectively aligned with the mounting holes 290 (located on the left side plate 209) on the left side plate assembly 101 and the mounting holes 291 (located on the right side plate 309) on the right side plate assembly 104.
  • the screws pass through the screw holes in the second portion 243 of the two mounting fittings and the mounting holes 290, 291 to secure the mounting fitting to the left side panel assembly and the right side panel assembly, and also complete the spindle assembly 106 and the left side panel assembly 101.
  • the spindle assembly 106 has a plurality of cantilevers 238, each of which corresponds to a pole, and the operating mechanism 107 is mounted on a structure of one of the poles.
  • the cantilever 238 corresponding to the pole is coupled to the lower link in the jumper assembly of the operating mechanism.
  • the left side panel assembly 101 and the right side panel assembly 104 in addition to being secured by the pivot shaft 217 of the latch assembly 102, there is another fixed shaft 247 at the other end relative to the latch assembly 102.
  • the fixed shaft 247 also passes through the holes in the left side plate assembly and the right side plate assembly and is fixed by screws, and the fixed shaft 247 and the rotating shaft 217 together fix the left side plate assembly 101 and the right side plate assembly 104 together.
  • the circuit breaker 108 includes a base 109 and a middle cover 159.
  • the circuit breaker 108 is a multi-pole circuit breaker having a multi-pole moving contact 110 corresponding to a multi-phase circuit.
  • the operating mechanism 107 is mounted on the moving contact of one of the poles.
  • the screw 249 cooperates with the left side plate assembly 101 of the operating mechanism and the nut 211 on the right side plate assembly 104 to fix the left side plate assembly 101 and the right side plate assembly 104
  • the operating mechanism 107 is mounted to the moving contact of one of the poles.
  • the multi-pole moving contacts 110 are respectively coupled to corresponding cantilevers 238 of the spindle assembly 106 via pins 250, and the moving contacts 110 of each pole are coupled to a corresponding cantilever 238.
  • the pin 250 is fixed in a connecting hole on the cantilever 238.
  • each of the cantilever arms 238 has two attachment holes therein, wherein the upper connection holes are for connection with the jumper assembly and the lower connection holes are for connection with the movable contacts.
  • the operating handle 230 is mounted on the lever assembly 105, and more specifically, the operating handle 230 is mounted on the mounting shaft 229.
  • Figures 10a and 10b illustrate the aforementioned operation of the operating mechanism to move the movable contact to close.
  • Fig. 10a mainly discloses the closing process of the operating mechanism
  • Fig. 10b discloses the process of the operating mechanism driving the moving contact to close.
  • the lever assembly 105 moves counterclockwise about the rotating shaft 213 under the action of a human being, for example, the human hand pushes the operating handle 230 to drive the lever assembly to rotate.
  • the illustrated closing direction is indicated by the arrow to cause the lever assembly to rotate counterclockwise.
  • the lever assembly spring 231 drives the upper link 201 to rotate about the pin shaft 203, and the upper link 201 rotates clockwise about the pin shaft 203.
  • the upper link 201 drives the lower link 202 to move.
  • the lower link 202 drives the cantilever 238 of the spindle assembly 106 through the pin 246 (the cantilever 238 is connected to the jumper assembly 100).
  • the cantilever 238 further drives the spindle 237 to rotate about the axis 106A of the spindle.
  • the spindle 237 rotates clockwise around the axis 106A. .
  • the rotation of the main shaft 237 drives the other cantilever arms 238 to interlock, and each of the cantilever arms 238 drives the movable contacts 110 to complete the closing by the pin shafts 250.
  • Each of the moving contacts 110 rotates counterclockwise about a respective center of rotation 255.
  • the extreme position of the upper link 201 in the clockwise rotation is limited by the limit pin 205, and when the upper link 201 is rotated to come into contact with the limit pin 205, the upper link 201 is no longer rotated.
  • the upper link 201 is limited by the limit pin 205.
  • Figures 11a and 11b illustrate the aforementioned operation of the operating mechanism to drive the movable contact to open.
  • Figure 11a mainly reveals the opening process of the operating mechanism
  • Figure 11b reveals that the operating mechanism drives the dynamic touch The process of opening the head.
  • the lever assembly 105 moves clockwise around the rotating shaft 213 under the action of a human being, for example, the human hand pushes the operating handle 230 to drive the lever assembly to rotate.
  • the illustrated opening direction is indicated by the arrow to cause the lever assembly to rotate clockwise.
  • the lever assembly spring 231 drives the upper link 201 to rotate about the pin shaft 203, and the upper link 201 rotates counterclockwise about the pin shaft 203.
  • the upper link 201 drives the lower link 202 to move.
  • the lower link 202 drives the cantilever 238 of the spindle assembly 106 through the pin 246 (the cantilever 238 is coupled to the jumper assembly 100).
  • the cantilever 238 further drives the spindle 237 to rotate about the axis 106A of the spindle.
  • the spindle 237 rotates counterclockwise about the axis 106A. .
  • each of the cantilever arms 238 drives the movable contacts 110 through the pin 250 to complete the opening.
  • Each of the movable contacts 110 rotates clockwise about a respective center of rotation 255.
  • the extreme position of the spindle 237 for counterclockwise rotation is determined by the spindle stops 239, 240 and the fixed shaft 247.
  • the spindle stops 239, 240 are in contact with the fixed shaft 247, the spindle member is no longer rotated.
  • Figures 12a and 12b illustrate a block diagram of an operating mechanism for conducting a weld isolation indication in accordance with an embodiment of the present invention.
  • Fig. 12a mainly discloses a structural diagram of the operating mechanism for performing the welding isolation indication
  • Fig. 12b discloses a structural diagram of the operating mechanism and the movable contact for the welding isolation indication.
  • the operating mechanism of the present invention provides an isolation protection function for the operating mechanism in the welded state.
  • the isolation protection function is formed by the limit block 259 at the end of the spindle stops 239 and 240 and the shallow hook extension 258 of the "boot" shape on the sheet metal bend 228.
  • the welding isolation mechanism of the operating mechanism of the circuit breaker of the present invention can limit the stroke of the operating mechanism to the opening direction when the moving contact is welded, so as to protect the operating mechanism from being damaged by forced operation. After the external force disappears, the operating mechanism can reset itself to the closing position.
  • the agility can effectively improve the performance of the operating mechanism and meet the needs of high-performance circuit breakers.

Abstract

一种断路器的操作机构(107)的熔焊隔离机构，该断路器的操作机构包括跳扣组件（100）、左侧板组件（101）、右侧板组件（104）、锁扣组件（102）、半轴组件（103）、杠杆组件（105）和主轴组件（106）。跳扣组件、锁扣组件和杠杆组件安装在左侧板组件和右侧板组件之间，半轴组件和主轴组件贯穿左侧板组件和右侧板组件并且延伸到左侧板组件和右侧板组件之外。跳扣组件、锁扣组件、半轴组件、杠杆组件和主轴组件联动。其中杠杆组件和主轴组件上具有隔离装置，隔离装置在动触头（110）熔焊时限制操作手柄（230），使操作手柄不能进行分闸。该熔焊隔离机构能够在动触头出现熔焊时限制操作机构向分闸方向转动的行程，以保护操作机构不会被强行操作而损坏。在外力消失后，操作机构能够自行复位到合闸位置。

Description

断路器的操作机构的熔焊隔离机构 技术领域
本发明涉及低压电器领域，更具体地说，涉及开关电器的操作机构。
背景技术
断路器是低压配电网中主要的起到保护作用的开关电器，断路器为线路提供过载和短路保护。塑料外壳式断路器是其中的一种，而大容量塑壳断路器是指额定电流达到或超过800A的断路器，该断路器通常为三极和四极结构，即该断路器具有三组或者四组触头，对应三相或者四相电路。操作机构与该三组或者四组触头同时连接，通过操作操作机构，使得该三组或者四组触头同时合闸、分闸或者脱扣。
在某些情况下，触头可能会出现熔焊，熔焊是指动触头和静触头由于高温而熔化，并因此而连接在一起无法分离。由于操作机构与触头是联动的，当动触头和静触头出现熔焊而无法分离时，操作机构也无法动作。由于熔焊通常发生在电路导通时，因此操作机构会被锁死在合闸位置上。此时如果有外力，比如人力对操作机构进行分闸操作，会导致操作机构的损坏。
发明内容
本发明旨在提出一种能够在出现熔焊时限制操作机构的行程以保护操作机构的熔焊隔离机构。
根据本发明的一实施例，提出一种断路器的操作机构的熔焊隔离机构，其中断路器的操作机构包括：跳扣组件、左侧板组件、右侧板组件、锁扣组件、半轴组件、杠杆组件和主轴组件。跳扣组件、锁扣组件和杠杆组件安装在左侧板组件和右侧板组件之间，半轴组件和主轴组件贯穿左侧板组件和右侧板组件并且延伸到左侧板组件和右侧板组件之外。跳扣组件、锁 扣组件、半轴组件、杠杆组件和主轴组件联动。其中杠杆组件和主轴组件上具有隔离装置，隔离装置在动触头熔焊时限制操作手柄，使操作手柄不能进行分闸。
在一个实施例中，主轴组件包括主轴，主轴上具有多个悬臂，主轴上还具有主轴限位件，主轴限位件上具有限位块。
在一个实施例中，杠杆组件包括钣金折弯件，钣金折弯件折弯形成顶壁和两个侧壁，钣金折弯件上安装有杠杆组件弹簧，杠杆组件弹簧被钣金折弯件所包围，钣金折弯件在两个侧壁的底部的第一端形成浅钩形的延伸部。
在一个实施例中，隔离装置由位于主轴限位件上的限位块和位于钣金折弯件上的浅钩形的延伸部构成。
在一个实施例中，当动触头出现熔焊时，与动触头联动的主轴组件被锁定在合闸位置不能转动，当杠杆组件受外力而向分闸方向转动时，主轴限位件上的限位块和钣金折弯件上的浅钩形的延伸部接触，使得杠杆组件无法抵达分闸位置。
在一个实施例中，在外力消失后，杠杆组件弹簧产生力矩得杠杆组件向合闸方向转动复位。
本发明的断路器的操作机构的熔焊隔离机构能够在动触头出现熔焊时限制操作机构向分闸方向转动的行程，以保护操作机构不会被强行操作而损坏。在外力消失后，操作机构能够自行复位到合闸位置。
附图说明
本发明上述的以及其他的特征、性质和优势将通过下面结合附图和实施例的描述而变的更加明显，在附图中相同的附图标记始终表示相同的特征，其中：
图1揭示了采用本发明的一实施例的熔焊隔离机构的断路器的操作机构的结构图。
图2a和图2b揭示了图1所示的断路器的操作机构中跳扣组件的结构图。
图3a揭示了图1所示的断路器的操作机构中左侧板组件和锁扣组件的结构图。
图3b从另一个角度揭示了左侧板组件和锁扣组件的结构图。
图4a揭示了锁扣组件的第一实施例的结构图。
图4b揭示了锁扣组件的第二实施例的结构图。
图5揭示了图1所示的断路器的操作机构中右侧板组件的结构图。
图6a和图6b揭示了图1所示的断路器的操作机构中杠杆组件的结构图。
图7a和图7b揭示了图1所示的断路器的操作机构中主轴组件的结构图。
图8揭示了图1所示的断路器的操作机构与断路器的装配结构图。
图9揭示了图1所示的断路器的操作机构与断路器的装配结构图。
图10a和图10b揭示了图1所示的操作机构带动动触头进行合闸的过程。
图11a和图11b揭示了图1所示的操作机构带动动触头进行分闸的过程。
图12a和图12b揭示了根据本发明的一实施例的操作机构进行熔焊隔离指示的结构图。
具体实施方式
参考图1所示，图1揭示了根据本发明的一实施例的断路器的操作机构的结构图。操作机构107包括跳扣组件100、左侧板组件101、锁扣组件102、半轴组件103、右侧板组件104、杠杆组件105和主轴组件106。
图2a和图2b揭示了跳扣组件的结构图。参考图2a和2b所示，跳扣组件100包括跳扣204。跳扣204的第一端具有第一孔207，转轴208铆 接在第一孔207中。跳扣204的中部具有销轴孔，销轴203穿过销轴孔，将上连杆201铆接在跳扣204上。在靠近销轴孔的位置具有限位孔，限位销钉205铆接在限位孔中。由于图2a所示的是铆接了限位销钉205后的状态，因此限位孔被阻挡，限位孔的位置即限位销钉205所在的位置。跳扣204的第二端呈钩形，钩形的内侧形成第一斜面256、钩形的外侧形成第二斜面253。需要说明的是，虽然253被成为第二斜面，但该“斜面”实际上是圆弧形，或者至少包括一部分的圆弧面。上连杆201的上端铆接在跳扣204上，上连杆201的中部具有销轴孔，销轴203穿过销轴孔，将下连杆202铆接在上连杆201上。上连杆201的下端具有连接孔236。如图2b所示，下连杆202的上端具有连接孔283，轴销穿过连接孔283将下连杆202铆接在上连杆201上，下连杆202的下端具有连接孔282。
侧板组件包括左侧板组件101和右侧板组件104。左侧板组件101和右侧板组件104具有对称的结构。参考图1所示，跳扣组件100、锁扣组件102、半轴组件103、杠杆组件105和主轴组件106的均位于左侧板组件101和右侧板组件104之间。并且，锁扣组件102、半轴组件103、杠杆组件105和主轴组件106的两端分别安装在左侧板组件101和右侧板组件104上。图3a和图3b揭示了左侧板组件的结构，其中图3a和图3b分别从不同的角度揭示了左侧板组件的结构。如图所示，左侧板组件101包括左侧板209。左侧板209在底部靠近两端的位置形成折弯孔210，折弯孔210包括与侧板209垂直的延伸板，以及开设在延伸板上的孔。在折弯孔210上铆接有螺母211。折弯孔210和螺母211用于将操作机构107安装到断路器上。左侧板209在中部靠近底部的位置具有安装孔212，安装孔212用于安装转轴213，转轴213是杠杆组件105的转轴，杠杆组件105绕转轴213转动。如图3b所示，转轴213是一个短轴，转轴213在朝向左侧板209内侧的端部具有端盖。左侧板209在第二端靠近顶部的位置具有安装孔215，锁扣组件102的转轴217安装在安装孔215中，从而将锁扣组件102安装到左侧板组件101上。左侧板209在第二端靠近底部 的位置具有半轴孔226，半轴孔226用于装配半轴组件103。左侧板209在靠近第一端的底部的位置具有一半圆形的缺口299，该缺口299用于容纳主轴组件106，在缺口299的上方有一安装孔290，安装孔290用于供主轴组件106的螺钉固定。左侧板209在靠近第一端的顶部的位置具有跳扣安装孔280，跳扣安装孔280用于容纳跳扣组件100的转轴208。
图5揭示了右侧板组件的结构图。右侧板组件104与左侧板组件101具有对称的结构，右侧板309具有与左侧板209对称的折弯孔310、螺母311、用于安装转轴213的安装孔312、用于安装锁扣组件102的转轴217的安装孔315、用于装配半轴组件103的半轴孔227、用于容纳主轴组件106的半圆形的缺口399、用于供主轴组件106的螺钉固定的安装孔291、用于容纳跳扣组件100的转轴208的跳扣安装孔281。
锁扣组件102包括钣金件219、定位轴220、轴承221、锁扣组件弹簧222和转轴217。参考图3a和图3b所示，主要参考图3b，需要说明的是，为了更清楚地表达锁扣组件102的安装结构，图3b与图3a使用两个不同的角度揭示了侧板组件101与锁扣组件102，图3b更加清楚地揭示了锁扣组件的安装结构。图4a揭示了锁扣组件中钣金件219、定位轴220和轴承221的结构。钣金件219包括两片形状一致的钣金片，两片钣金片以一定间隔设置，两根定位轴220固定两个钣金片形成钣金件219。轴承221夹在两个钣金片之间，轴承221的两端分别安装在一个钣金片上。轴承221位于两根定位轴220之间。钣金件219的上端具有轴孔，通过该轴孔，钣金件219安装在转轴217上，并且钣金件219能够绕转轴217转动。转轴217上还套有锁扣组件弹簧222，锁扣组件弹簧222同样夹在两个钣金片之间。轴承221与跳扣组件100的第二斜面253配合，使得锁扣组件102能够对跳扣组件100进行限位。图4b揭示了锁扣组件的另一个实施例的结构图，在图4b所示的结构中，钣金件219A包括两片形状不一致的钣金片，其中一片钣金片上具有弯折脚，而另一片钣金片上没有弯折脚，两片钣金片上同样具有共转轴217穿过的孔。两片钣金片以一定间隔设置， 并且通过一片状部分相连，不再使用定位轴。或者说，钣金件219A是一个单一的部件，包括片状部分以及由片状部分连接的两片钣金片。轴承221A夹在两个钣金片之间。
参考图1所示，半轴组件103包括半轴223。半轴223的两端分别安装在左侧板组件101的侧板209上的半轴孔226，以及右侧板组件104的侧板209上的半轴孔227中。半轴组件103上具有两个故障接收件，第一故障接收件224和第二故障接收件225。第一故障接收件224和第二故障接收件225均位于左侧板组件101和右侧板组件104之间，其中第一故障接收件224靠近左侧板组件101的侧板内侧设置，第二故障接收件225靠近右侧板组件104的侧板内侧设置。半轴组件103和锁扣组件102共同形成操作机构的二级锁扣。
图6a和图6b揭示了杠杆组件的结构图。杠杆组件105包括钣金折弯件228，钣金折弯件228折弯形成顶壁和两个侧壁，顶壁和两个侧壁形成一半包围的结构。钣金折弯件228的顶壁上铆接安装轴229，安装轴229用于安装操作手柄230。钣金折弯件228在顶壁与两个侧壁的交界处各自开有一个安装槽233。在两个安装槽233之间装有弹簧安装轴232。杠杆组件弹簧231的上端连接在弹簧安装轴232上。在图示的实施例中，有两根杠杆组件弹簧231并列设置。杠杆组件弹簧231被钣金折弯件228所包围。杠杆组件弹簧231的下端具有连接孔234，连接孔234与上连杆201下端的连接孔236对齐。连接轴235穿过连接孔234和连接孔236，使得杠杆组件弹簧231与跳扣组件100的上连杆201连接，从而杠杆组件105与跳扣组件101联动。钣金折弯件228在两个侧壁的底部的第一端形成浅钩形的延伸部258，该浅钩形的延伸部258具有类似“靴子”的造型。该浅钩形的延伸部258起到对杠杆组件105的转动进行限位的作用。钣金折弯件228在两个侧壁的底部靠近第二端的位置形成有半圆形的缺口241，该半圆形的缺口241用于容纳转轴213。杠杆组件105绕转轴213转动。
图7a和图7b揭示了主轴组件的结构图。主轴组件106包括主轴237。 在主轴237上具有多个悬臂238，在一个实施例中，多个悬臂238焊接在主轴237上。多个悬臂238分别对应多个极的动触头组件，或者说对应于多相电路。每一个悬臂238上具有连接孔。主轴237上还具有一对主轴限位件239和240。该一对主轴限位件239和240设置在多个悬臂238的其中一个的两侧，并且，该对主轴限位件239和240在主轴237上的位置相对于该悬臂238对称。主轴限位件239和240对应于其中一相电路。主轴限位件239和240的端部具有弯折的限位块259，该弯折的限位块259能与钣金折弯件228上“靴子”造型的浅钩形的延伸部258配合，利用主轴组件106来对杠杆组件105的转动范围进行限位。图7b揭示了主轴组件的安装配件。安装配件包括两个部分：第一部分242和第二部分243。第一部分242和第二部分243是一个整体。第一部分242形成一个圆形的孔，该孔的直径与主轴237匹配，主轴237从该孔中穿过。第二部分243位于第一部分242的上方，第二部分243上具有螺孔。在左侧板组件101和右侧板组件104上分别安装一个安装配件。第一部分242上的孔分别于半圆形的缺口299或者399对齐，以用于容纳主轴237。第二部分243上的螺孔分别对准安装孔290或者安装孔291，螺钉穿过安装孔和螺孔，将安装配件连同主轴一起安装到左侧板组件和右侧板组件上。
结合图1、图2a、图2b、图3a、图3b、图4a、图4b、图5、图6a、图6b、图7a和图7b，跳扣组件100、左侧板组件101、锁扣组件102、半轴组件103、右侧板组件104、杠杆组件105和主轴组件106以如下的方式组装成操作机构107。跳扣组件100的转轴208的两端分别安装在左侧板组件101的跳扣安装孔280(位于左侧板209上)和右侧板组件104的跳扣安装孔281(位于右侧板309上)。杠杆组件105的钣金折弯件228的两侧侧壁底部的半圆形的缺口241分别架设在左侧板组件101和右侧板组件104的转轴213上。如前面所述的，转轴213是短轴，两个转轴213分别安装在左侧板209和右侧板309上，转轴213朝向内侧的端部具有端盖，端盖的直径大于转轴，端盖对钣金折弯件228的侧壁进行横向的限位。 杠杆组件105中的杠杆组件弹簧231底部的连接孔234与上连杆201下端的连接孔236对齐，连接轴235穿过连接孔234和连接孔236，将杠杆组件弹簧231与上连杆201连接。主轴组件106的主轴237穿过两个安装配件的第一部分242上的孔，使得主轴237被连接到两个安装配件上。主轴237被放置到左侧板组件101的半圆形缺口299(位于左侧板209上)和右侧板组件104的半圆形缺口399(位于右侧板309上)中，两个安装配件的第二部分243上的螺孔分别对准左侧板组件101上的安装孔290(位于左侧板209上)和右侧板组件104上的安装孔291(位于右侧板309上)。螺钉穿过两个安装配件的第二部分243上的螺孔以及安装孔290、291，将安装配件固定在左侧板组件和右侧板组件上，也完成主轴组件106与左侧板组件101和右侧板组件104的装配。主轴组件106的其中一个悬臂238与跳扣组件100的下连杆202连接，悬臂238上的连接孔与下连杆202下端的连接孔282由销轴246连接(销轴246在图11中揭示)，形成连杆结构，主轴组件106与跳扣组件100实现连接。对于具有多极结构的多相电路来说，主轴组件106上具有多个悬臂238，每个悬臂238对应一极，操作机构107安装在其中某一极的结构上。对应该极的悬臂238与操作机构的跳扣组件中的下连杆连接。对于左侧板组件101和右侧板组件104来说，除了借助于锁扣组件102的转轴217进行固定之外，在相对于锁扣组件102的另一端还具有另一个固定轴247。固定轴247同样穿过位于左侧板组件和右侧板组件上的孔并由螺钉固定，固定轴247和转轴217一起将左侧板组件101和右侧板组件104固定在一起。
参考图8和图9，揭示了操作机构107与断路器108的装配结构图。其中图8和图9是去除断路器的顶盖后的结构图。参考图8和图9所示，断路器108包括基座109和中盖159。在图示的实施例中，断路器108是一个多极断路器，具有对应多相电路的多极动触头110。操作机构107安装在其中一极的动触头上。螺钉249与操作机构的左侧板组件101和右侧板组件104上的螺母211配合，将左侧板组件101和右侧板组件104固定 在中盖159上，从而将操作机构107安装到其中一极的动触头上。多极动触头110通过销轴250分别连接到主轴组件106的对应的悬臂238上，每一极的动触头110连接到与之对应的悬臂238。销轴250固定在悬臂238上的连接孔中。参考图7a，每一个悬臂238上具有两个连接孔，其中上方的连接孔用于与跳扣组件连接，下方的连接孔用于与动触头连接。操作手柄230安装在杠杆组件105上，更加具体地说，操作手柄230安装在安装轴229上。
图10a和图10b揭示了前述的操作机构带动动触头进行合闸的过程。图10a主要揭示了操作机构的合闸过程，图10b揭示了操作机构带动动触头合闸的过程。在进行合闸时，跳扣组件100中的跳扣204的尾端，钩形的外侧所形成第二斜面253被轴承221顶住并被轴承221所限制。锁扣组件102的钣金件219被半轴组件103的半轴223所限制。杠杆组件105在人力作用下绕转轴213逆时针运动，比如，人力推动操作手柄230来带动杠杆组件转动。在图10a和图10b所示的实施例中，图示的合闸方向如箭头所指，是使得杠杆组件逆时针转动。在推动杠杆组件105逆时针转动后，杠杆组件弹簧231驱动上连杆201以销轴203为转轴转动，上连杆201绕销轴203顺时针转动。上连杆201带动下连杆202运动。下连杆202通过销轴246带动主轴组件106的悬臂238(该悬臂238于跳扣组件100连接)，悬臂238进一步带动主轴237围绕主轴的轴心106A转动，主轴237围绕轴心106A顺时针转动。主轴237的转动带动其他的悬臂238联动，各个悬臂238通过销轴250带动各个动触头110完成合闸。各个动触头110围绕各自的转动中心255逆时针转动。回到图2a，上连杆201顺时针转动的极限位置被限位销钉205所限制，当上连杆201转动至与限位销钉205接触时，上连杆201不再转动。于是，合闸完成后，上连杆201由限位销钉205进行限位。
图11a和图11b揭示了前述的操作机构带动动触头进行分闸的过程。图11a主要揭示了操作机构的分闸过程，图11b揭示了操作机构带动动触 头分闸的过程。在进行分闸时，杠杆组件105在人力作用下绕转轴213顺时针运动，比如，人力推动操作手柄230来带动杠杆组件转动。在图11a和图11b所示的实施例中，图示的分闸方向如箭头所指，是使得杠杆组件顺时针转动。在推动杠杆组件105顺时针转动后，杠杆组件弹簧231驱动上连杆201以销轴203为转轴转动，上连杆201绕销轴203逆时针转动。上连杆201带动下连杆202运动。下连杆202通过销轴246带动主轴组件106的悬臂238(该悬臂238与跳扣组件100连接)，悬臂238进一步带动主轴237围绕主轴的轴心106A转动，主轴237围绕轴心106A逆时针转动。主轴237的转动带动其他的悬臂238联动，各个悬臂238通过销轴250带动各个动触头110完成分闸。各个动触头110围绕各自的转动中心255顺时针转动。结合参考图7a，主轴237逆时针转动的极限位置由主轴限位件239、240和固定轴247所决定。参考图11a和图11b，当主轴限位件239、240与固定轴247接触时，主轴部件不再转动。
图12a和图12b揭示了根据本发明的一实施例的操作机构进行熔焊隔离指示的结构图。图12a主要揭示了操作机构在进行熔焊隔离指示的结构图，图12b揭示了操作机构和动触头在进行熔焊隔离指示的结构图。当多级动触头中的动触头110出现熔焊时，动触头110由于熔焊而与静触头188固定，无法再绕转动中心255转动。由于主轴组件106与动触头110联动，因此在动触头熔焊时，主轴组件106也不能绕转动中心106A转动，或者说，主轴组件106被锁定在合闸位置。此时，如果人力操作杠杆组件105进行分闸，由于主轴组件106被锁死，容易造成机构损坏。为了避免这种情况，本发明的操作机构对熔焊状态下的操作机构设置了隔离保护功能。隔离保护功能由主轴限位件239和240的端部的限位块259和钣金折弯件228上“靴子”造型的浅钩形的延伸部258共同构成。参考图12a和图12b，当出现熔焊时，如果人力操作操作手柄230顺时针转动，准备进行分闸，那么当杠杆组件105顺指针转过一定的角度后，限位块259和“靴子”造型的浅钩形的延伸部258接触，使得杠杆组件105不能继续转动，无法抵 达分闸位置。在人力消失后，在杠杆组件弹簧231的作用下，存在力矩，该力矩的力臂为L1，杠杆组件弹簧231通过力臂L1产生力矩使得杠杆组件105绕转轴213逆时针转动，重新回到合闸位置。图12a中箭头所指的方向为杠杆组件105在力矩的作用下自动复位的方向，为逆时针转动。
本发明的断路器的操作机构的熔焊隔离机构能够在动触头出现熔焊时限制操作机构向分闸方向转动的行程，以保护操作机构不会被强行操作而损坏。在外力消失后，操作机构能够自行复位到合闸位置。
捷性，能够有效提升操作机构的性能，满足高性能断路器的需要。
上述实施例是提供给熟悉本领域内的人员来实现或使用本发明的，熟悉本领域的人员可在不脱离本发明的发明思想的情况下，对上述实施例做出种种修改或变化，因而本发明的保护范围并不被上述实施例所限，而应该是符合权利要求书提到的创新性特征的最大范围。

Claims (6)

  1. 一种断路器的操作机构的熔焊隔离机构，其中所述断路器的操作机构包括：跳扣组件、左侧板组件、右侧板组件、锁扣组件、半轴组件、杠杆组件和主轴组件；
    跳扣组件、锁扣组件和杠杆组件安装在左侧板组件和右侧板组件之间，半轴组件和主轴组件贯穿左侧板组件和右侧板组件并且延伸到左侧板组件和右侧板组件之外；
    跳扣组件、锁扣组件、半轴组件、杠杆组件和主轴组件联动；
    其中所述杠杆组件和主轴组件上具有隔离装置，隔离装置在动触头熔焊时限制操作手柄，使操作手柄不能进行分闸。
  2. 如权利要求1所述的断路器的操作机构的熔焊隔离机构，其特征在于，所述主轴组件包括主轴，主轴上具有多个悬臂，主轴上还具有主轴限位件，主轴限位件上具有限位块。
  3. 如权利要求2所述的断路器的操作机构的熔焊隔离机构，其特征在于，所述杠杆组件包括钣金折弯件，钣金折弯件折弯形成顶壁和两个侧壁，钣金折弯件上安装有杠杆组件弹簧，杠杆组件弹簧被钣金折弯件所包围，钣金折弯件在两个侧壁的底部的第一端形成浅钩形的延伸部。
  4. 如权利要求3所述的断路器的操作机构的熔焊隔离机构，其特征在于，所述隔离装置由位于主轴限位件上的限位块和位于钣金折弯件上的浅钩形的延伸部构成。
  5. 如权利要求4所述的操作机构的熔焊隔离机构，其特征在于，当动触头出现熔焊时，与动触头联动的主轴组件被锁定在合闸位置不能转动， 当杠杆组件受外力而向分闸方向转动时，主轴限位件上的限位块和钣金折弯件上的浅钩形的延伸部接触，使得杠杆组件无法抵达分闸位置。
  6. 如权利要求5所述的操作机构的熔焊隔离机构，其特征在于，在外力消失后，杠杆组件弹簧产生力矩得杠杆组件向合闸方向转动复位。
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