CN209328827U - Mold cased circuit breaker - Google Patents

Abstract

A kind of mold cased circuit breaker, it includes operating mechanism and tripping mechanism, operating mechanism is cooperated by draw bar and tripping mechanism, the locking piece for limiting draw bar is equipped in side, the drive shaft and cam member of locking piece side are set, and the limit rotary shaft and protection mechanism of the locking piece other side are set, drive shaft drives locking piece close to locking draw bar by cam member, the long guiding hole cooperated with limit rotary shaft is equipped on locking piece, one end of limit rotary shaft passes through long guiding hole and connect with drive shaft, protection mechanism covers the other end in limit rotary shaft and is slidably matched with locking piece, by the way that protection mechanism is arranged in the side of locking piece, long guiding hole can not only be blocked, the intracorporal electric arc of shell is avoided to run out of shell along locking mechanism, and protection mechanism can also limit locking piece in drive shaft and limit rotary shaft, it prevents Locking piece causes locking mechanism skew, clamping stagnation occur when mobile.

Description

Mold cased circuit breaker

Technical field

The invention is related to Low Voltage Electrical Apparatus, more particularly to a kind of mold cased circuit breaker.

Background technique

Mold cased circuit breaker is the important component of low-voltage electrical apparatus, has been obtained and is widely applied, and works as electric circuit When working properly, mold cased circuit breaker can supply the circuit of electric energy by switch closing and switch opening with open and close, stop to reach The functions such as electricity, power supply and conversion circuit；When overload, decompression, the under-voltage or failures such as short-circuit occurs in electric circuit, plastic shell is breaking Device can be avoided with automatic trip by circuitry cuts because fault jeopardizes the safety of staff and the normal fortune of equipment again Row.But existing mold cased circuit breaker generally all do not have anti-error closing function, mold cased circuit breaker tripping after if There are no debuggings, and false switching will lead to serious safety problem again.

Summary of the invention

The defect for aiming to overcome that the prior art of the invention, provides that a kind of structure is simple, modeling of high reliablity Shell type breaker.

To achieve the above object, the invention adopts the technical scheme that

A kind of mold cased circuit breaker comprising operating mechanism 31 and tripping mechanism 33, operating mechanism 31 by draw bar 1 with Tripping mechanism 33 cooperates, and is equipped with the locking piece for limiting draw bar 1 in side, the drive shaft of locking piece side is arranged in 221 and cam member 23, and the limit rotary shaft 222 and protection mechanism of the locking piece other side are set, drive shaft 221 passes through Cam member 23 drives locking piece close to locking draw bar 1, and the long guiding hole cooperated with limit rotary shaft 222 is equipped on locking piece 223, one end of limit rotary shaft 222 passes through long guiding hole 223 and connect with drive shaft 221, and protection mechanism is covered in limit rotary shaft 222 The other end be slidably matched with locking piece.

It preferably, further include covering the position-limit mechanism being fixedly connected in 221 outside of drive shaft with circuit breaker housing.

Preferably, protection mechanism includes covering the limit plate 261 being slidably matched in 222 outside of limit rotary shaft with locking piece, limit The outer diameter of position plate 261 is greater than the internal diameter of long guiding hole 223, is equipped on limit plate 261 and reaches and be slidably matched in long guiding hole 223 Guide post 262, in guide post 262 be equipped with evacuation limit rotary shaft 222 evacuation through-hole 264, one end of limit rotary shaft 222 is worn It crosses evacuation through-hole 264 to connect with drive shaft 221, the other end of limit rotary shaft 222 is equipped with the limit cooperated with evacuation through-hole 264 First 225, the outer diameter of spacing head 225 is greater than the internal diameter of evacuation through-hole 264.

Preferably, the protection mechanism further includes the protection sleeve 267 covered in 225 outside of spacing head, protection sleeve 267 One end is connect with limit plate 261, and the other end is connect with limit upper shield 263, protection sleeve 267, limit upper shield 263 and limit plate 261 are trapped among the surrounding of spacing head 225.

Preferably, the protection mechanism further includes covering to be located at spacing head 225 and limit plate 261 on the outside of limit rotary shaft 222 Between spring washer 265 and plain cushion 266, spring washer 265 is located at the top of plain cushion 266.

Preferably, the position-limit mechanism includes the fore shaft sleeve 226 covered in 221 outside of drive shaft, in fore shaft sleeve 226 Side be equipped with the spacing block set 2264 with circuit breaker housing limit cooperation, the bottom end of drive shaft 221 is equipped with the company of squarely Spindle 231, the bottom that connecting shaft 231 stretches out fore shaft sleeve 226 are connect with cam member 23, and drive shaft 221 is in connecting shaft 231 Top and fore shaft sleeve 226 between outer circumference be equipped with circlip mounting groove 257, cyclization is equipped in circlip mounting groove 257 Shape and the circlip 253 cooperated with the limit of the end face of fore shaft sleeve 226.

Preferably, the outside of the fore shaft sleeve 226 is equipped with the spacing collar 252 circularized, and 252 sets of spacing collar in fore shaft set The outside of cylinder 226 is connected to fore shaft sleeve 226 and connect with circuit breaker housing, sets in the bottom of spacing collar 252 and sets there are two opposite The card slot 2261 set, set on the two sides of 226 circumference of fore shaft sleeve there are two respectively with two card slots 2261 cooperation fore shaft it is recessed Slot 2262 is equipped with the connector with card slot 2261 and the limit cooperation of fore shaft groove 2262 simultaneously in the inside of fore shaft sleeve 226.

Preferably, between the top side and circuit breaker housing of the spacing collar 252 be equipped with sealing ring 251, sealing ring 251 by Outer ring is equipped at the top of spacing collar 252 and is cooperated with 251 inner ring surrounding of sealing ring to inner ring tapered inclination gradually downward Positive stop lug boss 2263

Preferably, the width of the spacing collar 252 is tapered from top to bottom is gradually reduced.

Preferably, the side of the circlip 253 is equipped with the circlip opening 254 for allowing drive shaft 221 to pass through, in circlip 253 Towards the circlip grooves 255 of 254 setting of circlip opening there are two being set on the inner ring ring wall of the other side.

Preferably, draw bar 1 includes the operation portion 11 cooperated with operating mechanism 31, the tripping portion with the cooperation of tripping mechanism 33 12, and first sticking department 131 of 1 the same side of draw bar is set with tripping portion 12, between the first sticking department 131 and tripping portion 12 Every setting, the first side of the sticking department 131 far from tripping mechanism 33 is arranged in locking piece, and locking piece is equipped with the limit of l-shaped Part 21, the first sticking department 131 are located at the inside of locating part 21, and locating part 21 pulls the first sticking department 131 to lock draw bar 1.

Preferably, draw bar 1 includes the operation portion 11 cooperated with operating mechanism 31, the tripping portion with the cooperation of tripping mechanism 33 12, and it is oppositely arranged on tripping portion 12 second sticking department 132 of 1 two sides of draw bar, locking piece is arranged in the second sticking department 132 sides far from tripping mechanism 33, locking piece are equipped with and the spaced locating part 21 of the second sticking department 132, locating part 21 push the second sticking department 132 to lock draw bar 1.

Preferably, locking piece includes the locating part 21 cooperated with draw bar 1 and covers the box cooperated on the outside of cam member 23 Body 24, locating part 21 are the overhead kick part of L-type comprising two vertically disposed sides and the folding being connected between two sides One end of turn of bilge, overhead kick part is connect with box body 24, and the other end and draw bar 1 cooperate；The drive shaft 221 and cam member 23 Vertical connection, drive shaft 221 and the moving direction of locating part 21 are vertically arranged；Cam member 23 by three equal parts protrusion group At drive shaft 221 is connect with the corner position of two of them protrusion junction.

Preferably, operation handle 34, multipole circuit breaker system are equipped in shell, every pole circuit breaker system includes contact machine The contact mechanism 32 of structure 32, tripping mechanism 33 and wiring mechanism, every pole circuit breaker system is connect with operating mechanism 31, and point Different phase lines is not accessed by corresponding wiring mechanism, the tripping mechanism 33 of every pole circuit breaker system passes through draw bar 1 and behaviour Make the cooperation of mechanism 31, tripping mechanism 33 makes the unlock tripping of operating mechanism 31 by draw bar 1 in corresponding phase line failure, makes to grasp Making mechanism 31 drives all contact mechanisms 32 to disconnect all phase lines, and locking piece is arranged in the side of operating mechanism 31 and is located at touching The top of head mechanism 32；Operating mechanism 31 includes stored energy mechanism, locking piece and fastener again, and locking piece and again fastener are in energy storage machine Snap lock keeps balance under the action of structure, and stored energy mechanism is made to keep energy storage, and draw bar 1 pushes fastener again when fault Disequilibrium is unlocked with locking piece, stored energy mechanism is released and can and drive all 32 disconnecting circuits of contact mechanism, then fastener, locking piece Rotated with draw bar 1 to original position and again again snap lock when, locking piece by the blocking of limit draw bar 1 again fastener to original position Rotation is set, when locking piece avoids draw bar 1, snap lock, operating mechanism 31 drive all contacts again for locking piece and again fastener All phase lines are connected in mechanism 32.

The mold cased circuit breaker of the invention can not only will be led by the way that protection mechanism is arranged in the side of locking piece It is blocked to long hole 223, avoids the intracorporal electric arc of shell from running out of shell along locking mechanism 2, and protection mechanism can also limit locking piece Position prevents from causing locking mechanism 2 skew, clamping stagnation occur when locking piece is mobile in drive shaft 221 and limit rotary shaft 222.This Outside, the surrounding for protecting sleeve 267, limit upper shield 263 and limit plate 261 to be trapped among spacing head 225 is protected, better reliability.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the invention mold cased circuit breaker；

Fig. 2 is the cooperation schematic diagram of the invention operating mechanism and draw bar；

Fig. 3 is the exploded view of the invention locking mechanism；

Fig. 4 is the sectional view of the invention locking mechanism；

Fig. 5 is the schematic diagram of the invention drive shaft and position-limit mechanism cooperation；

Fig. 6 is the first fit system of the invention draw bar and locking mechanism；

Fig. 7 is the side view of the invention Fig. 3；

Fig. 8 is second of fit system of the invention draw bar and locking mechanism；

Fig. 9 is the side view of the invention Fig. 5；

Figure 10 is the cooperation schematic diagram of the invention box body and drive shaft.

Specific embodiment

Below in conjunction with the embodiment that attached drawing 1 to 10 provides, the tool of the mold cased circuit breaker of the invention is further illustrated Body embodiment.The mold cased circuit breaker of the invention is not limited to the following description.

As shown in Figure 1-3, the mold cased circuit breaker of the invention includes shell, it is equipped with 31 He of operating mechanism in the housing Tripping mechanism 33, operating mechanism 31 are cooperated by draw bar 1 and tripping mechanism 33, are equipped in side for limiting draw bar 1 Locking mechanism 2, locking mechanism 2 include locking piece, the drive shaft 221 and cam member 23, Yi Jishe that locking piece side is arranged in The limit rotary shaft 222 and protection mechanism in the locking piece other side are set, drive shaft 221 drives locking piece close by cam member 23 It locks draw bar 1 and far from unlock draw bar 1, the long guiding hole 223 cooperated with limit rotary shaft 222, limit is equipped on locking piece One end of position shaft 222 passes through long guiding hole 223 and connect with drive shaft 221, and protection mechanism is covered in the another of limit rotary shaft 222 One end is slidably matched with locking piece, so that operating mechanism 31 is kept unlock by limiting draw bar 1, prevents operating mechanism 31 from detaining again simultaneously Make breaker that can not close a floodgate, avoid security risk caused by breaker false switching, improve mold cased circuit breaker safety and can Avoiding draw bar 1 by property or locking mechanism 2, then operating mechanism 31 restores normal closing function, and protection mechanism can not only incite somebody to action Long guiding hole 223 blocks, and avoids the intracorporal electric arc of shell from running out of shell along locking mechanism 2, and protection mechanism can also be by locking piece Limit prevents from causing locking mechanism 2 skew, clamping stagnation occur when locking piece is mobile in drive shaft 221 and limit rotary shaft 222.

It further, further include covering the position-limit mechanism being fixedly connected in 221 outside of drive shaft with circuit breaker housing, position restrainer Structure and protection mechanism cooperate with the both ends of drive shaft 221 respectively to be limited, and can effectively further prevent leading when locking piece is mobile Locking mechanism 2 is caused skew, clamping stagnation occur.

Refering to a kind of embodiment of protection mechanism show Fig. 3-5, protection mechanism includes covering in 222 outside of limit rotary shaft The limit plate 261 being slidably matched with locking piece, the outer diameter of limit plate 261 is greater than the internal diameter of long guiding hole 223, in limit plate 261 It is equipped with and reaches the guide post 262 being slidably matched in long guiding hole 223, evacuation limit rotary shaft 222 is equipped in guide post 262 Evacuation through-hole 264, one end of limit rotary shaft 222 passes through evacuation through-hole 264 and connect with drive shaft 221, and the other end is equipped with limiting Potential head 225, the outer diameter of spacing head 225 are greater than the internal diameter of evacuation through-hole 264, and guide post 262 replaces limit rotary shaft 222 and guiding to grow Hole 223 cooperates the movement of guiding locking part, keeps locking piece movement more reliable.

Further, the protection mechanism further includes the protection sleeve 267 covered in 225 outside of spacing head, protects sleeve 267 One end connect with limit plate 261, the other end connect with limit upper shield 263, and protection sleeve 267 limits upper shield 263 and limit plate 261 surroundings for being trapped among spacing head 225 are protected, better reliability, especially when limit rotary shaft 222 and spacing head 225 use When this conductor of screw element, electric arc can be effectively prevent to further increase modeling to the influence of limit rotary shaft 222 and spacing head 225 The reliability of shell type breaker, in addition, limit upper shield 263 can also play the role of preventing disassembly limit rotary shaft 222.

Further, the protection mechanism further includes covering to be located at spacing head 225 and limit plate on the outside of limit rotary shaft 222 Spring washer 265 and plain cushion 266 between 261, spring washer 265 are located at the top of plain cushion 266, can be mentioned by spring washer 265 and plain cushion 266 The contact area of high spacing head 225 and limit plate 261, while increasing by 255 frictional force of spacing head, dispersion spacing head 255 is right The pressure of limit plate 261 prevents from damaging by pressure the equal parts of the softer limit plate 261 of quality, improves the reliability of limit plate 261.

Refering to a kind of embodiment of position-limit mechanism show Fig. 3-5, position-limit mechanism includes covering in 221 outside of drive shaft Fore shaft sleeve 226, the top of fore shaft sleeve 226 is stuck in the top of circuit breaker housing at T-type, and the bottom of fore shaft sleeve 226 is stretched Into circuit breaker housing, the spacing block set 2264 with circuit breaker housing limit cooperation, limit are equipped in the side of fore shaft sleeve 226 Convex block 2264 and circuit breaker housing cooperation limitation 226 sleeve of fore shaft sleeve rotation, the bottom end of drive shaft 221 is equipped with squarely Connecting shaft 231, connecting shaft 231 stretch out fore shaft sleeve 226 bottom connect with cam member 23, drive shaft 221 is in connecting shaft Outer circumference between 231 top and fore shaft sleeve 226 is equipped with circlip mounting groove 257, be equipped in circlip mounting groove 257 at Annular and the circlip 253 cooperated with the limit of the end face of fore shaft sleeve 226, the side of circlip 253, which is equipped with, allows drive shaft 221 to wear The circlip opening 254 crossed, circlip 253 snap into the side in circlip mounting groove 257 and passing through circlip 253 by circlip opening 254 It limits and cooperates with the bottom end face of fore shaft sleeve 226, circlip 253 can limit drive shaft 221 to be prevented in fore shaft sleeve 226 Only run out of.Preferably, recessed towards the circlip of 254 setting of circlip opening there are two being set on the inner ring ring wall of 253 other side of circlip Slot 255, two circlip grooves 255 can not only be such that circlip 253 is more tightly stuck in drive shaft 221, but also can be improved The elasticity of circlip 253, it is not easy to damage circlip 253.Circlip groove 255 and circlip opening 254 are connect with drive shaft 221 respectively

Further, the outside of the fore shaft sleeve 226 is equipped with the spacing collar 252 circularized, and 252 sets of spacing collar are being locked The outside of port sleeve 226 is connected between fore shaft sleeve 226 and circuit breaker housing, is set in the bottom of spacing collar 252 there are two phase To the card slot 2261 of setting, set on the two sides of 226 circumference of fore shaft sleeve there are two respectively with two card slots 2261 cooperation lock Port recess 2262 is equipped with the connection with card slot 2261 and the limit cooperation of fore shaft groove 2262 simultaneously in the inside of fore shaft sleeve 226 Part, connector, which can reach, fixes fore shaft sleeve 226 with circuit breaker housing in card slot 2261 and fore shaft groove 2262, spacing collar 252 are capable of increasing the contact area of fore shaft sleeve 226 Yu circuit breaker housing, make to connect more reliable.

Further, the width of the spacing collar 252 is tapered from top to bottom is gradually reduced, and is not only convenient for installing, and Can to avoid with other mechanical interferences, have the characteristics that structure simply and it is compact.

Further, sealing ring 251 is equipped between the top side and circuit breaker housing of spacing collar 252, sealing ring 251 is by outer The tapered inclination gradually downward of circumferential inner ring is equipped with the limit cooperated with 251 inner ring surrounding of sealing ring at the top of spacing collar 252 Position boss 2263, squeezing tapered downwardly convex inner ring on sealing ring 251 by positive stop lug boss 2263 generates sealing ring 251 Bigger deformation can not only provide better seal effect, and can be convenient sealing ring 251 and spacing collar 252 and fore shaft Sleeve 226 is assembled.

Preferably, the drive shaft 221 be lock tongue, the outside of lock tongue be equipped with fore shaft sleeve 226, one end of lock tongue with Cam member 23 is fixedly connected, and the shell that the other end stretches out mold cased circuit breaker is outer and be equipped with keyhole, by by pluggable key The key in hole drives drive shaft 221 and cam member 23 to rotate, and on the basis of anti-error closing, can also prevent the people of lack of competence Member's false-lock determines breaker, has higher reliability.Certainly, drive shaft 221 is also possible to handle, knob, or with by The executing agency's connection remotely controlled, belongs to the protection scope of the invention.

Preferably, the limit rotary shaft 222 and spacing head 225 are respectively the screw rod and nut of screw element, in drive shaft 221 are equipped with the threaded hole connecting with the screw rod of screw element, and the screw rod of screw element passes through long guiding hole 223 and drive shaft 221 On threaded hole connection, the diameter of the nut of screw element is greater than the internal diameter of long guiding hole 223 and limits with limit plate 261 and cooperate, Limit rotary shaft 222 and spacing head 225 use screw element to have the characteristics that easy to process, at low cost and intensity is high.

As is seen in figs 7-10, draw bar 1 includes that the operation portion 11 cooperated with operating mechanism 31 and tripping mechanism 33 cooperate Tripping portion 12, and the sticking department cooperated with locking mechanism 2, tripping mechanism 33 is by pushing tripping portion 12 to unlock operation portion 11 Operating mechanism 31, locking mechanism 2, which locks draw bar 1 by limitation locking portion, makes operating mechanism 31 keep unlock.By drawing The first sticking department 131 and tripping portion 12 are arranged on bar 1 can make locking mechanism 2 and tripping mechanism 33 in different location and draw bar 1 contact, keeps the reliability of mold cased circuit breaker higher, and structure is also more compact, setting and locking preferably on the first sticking department 131 The lock slots 133 that mechanism 2 cooperates.Certainly, locking mechanism 2 directly cooperates the protection model for also belonging to the invention with tripping portion 12 Enclose, but locking mechanism 2 cooperate with the first sticking department 131 being separately provided it is more flexible.

The first way that locking piece and draw bar 1 cooperate is shown refering to 6-7, the sticking department includes setting with tripping portion 12 The first sticking department 131 in 1 the same side of draw bar is set, the first sticking department 131 is between tripping portion 12 and operation portion 11 and de- The setting of the interval of buckle 12, locking piece are arranged in the first sticking department 131 and pull the first sticking department 131 far from the side of tripping mechanism 33 Draw bar 1 is locked, can be shortened at a distance between locking piece by the way that the first sticking department 131 is arranged on draw bar 1, it can not only Contact locking piece and tripping mechanism 33 with draw bar 1 in different location, and locking piece is smaller, structure is tighter It gathers, mold cased circuit breaker q&r can be effectively improved, setting cooperates with locking piece preferably on the first sticking department 131 Lock slots 133.Certainly, locking piece directly cooperates the protection scope for also belonging to the invention with tripping portion 12, but is locked out Part cooperates more flexible with the first sticking department 131 being separately provided.

The second way that locking piece and draw bar 1 cooperate is shown refering to 8-9, the sticking department includes and 12 phase of tripping portion To the second sticking department 132 that the upper and lower two sides of draw bar 1 are arranged in, locking piece is arranged in the second sticking department 132 far from tripping mechanism 33 side pushes the second sticking department 132 to lock draw bar 1, and the second sticking department 132 can not only prevent 32 disjunction of contact mechanism When the electric arc that pulls out go in tripping mechanism 33, effectively improve the reliability of mold cased circuit breaker, but also can be with locking piece Cooperation limit draw bar 1, prevents breaker false switching, has the characteristics that kill two birds with one stone, is ingenious in design.

The locking piece includes the locating part 21 cooperated with sticking department and covers the box body 24 cooperated on the outside of cam member 23, The outer profile of cam member 23 and the inner sidewall of box body 24 cooperate, and push box body 24 to drive locating part by the outer profile of cam member 23 21 limits or evacuation draw bar 1.Certainly, box body 24 can also be using the side of the other structures and cam member 23 such as rod-type, still The box body 24 of box-like is directly installed on cam member 23 in box body 24, and cooperation is more reliable, and assembly is also simpler.Refering to Fig. 7- 10 show two kinds of embodiments of locating part 21, and the locating part 21 is the overhead kick part of L-type comprising two substantially vertical settings Side and the bending part that is connected between two sides, refering to Fig. 7-8, the first lock of locating part 21 and 1 top side of draw bar When determining the cooperation of portion 131, between overhead kick part and cam member 23, one end of overhead kick part is connect the first sticking department 131 with box body 24 And it is overlapped on the top side of the first sticking department 131, the other end reaches the first sticking department 131 close to the side of tripping mechanism 33, passes through The first sticking department 131 is pulled to prevent draw bar 1 to back rotation.Refering to Fig. 9-10, the second lock of locating part 21 and 1 bottom side of draw bar When determining the cooperation of portion 132, the second sticking department 132 is located at the outside of overhead kick part, and one end of overhead kick part is connect with box body 24, the other end It is against the second side of the sticking department 132 far from tripping mechanism 33, by pushing the second sticking department 132 to prevent draw bar 1 to revolution It is dynamic.By the way that the overhead kick part of L-type will be set to set by locating part 21, it can not only gang up with sticking department and move backward, and can be with Second sticking department 132 abuts against forward movement, simplifies the basic element of character, optimizes mode of operation, have it is more convenient, easier to operate, Manufacture easier to process and the wider feature of applicability.Certainly, it when locating part 21 and the second sticking department 132 cooperate, can also select The simple structure such as push rod is selected, the protection scope of the invention is belonged to.In addition, drive shaft 221 is vertical with cam member 23 Connection, is vertically arranged drive shaft 221 and the moving direction of locating part 21, can be realized different mounting means and operation side Formula, structure are also more compact.In addition, cam member 23 be preferably have there are three equal part protrusion form, drive shaft 221 with wherein The corner position of two protrusions junction connects, and cam member 23 is not only more convenient for processing, but also has reliable transmission, structure tight The characteristics of gathering.

As shown in Figure 1, the locking mechanism 2 is oppositely arranged on the two sides of draw bar 1, locking mechanism 2 with tripping mechanism 33 The side of operating mechanism 31 is set and is located at the top of contact mechanism 32, the Xiang Suoding in line fault of tripping mechanism 33 The direction of mechanism 2 pushes draw bar 1 to rotate, and locking mechanism 2 limits draw bar 1 by preventing draw bar 1 from realizing to back rotation, By the way that locking mechanism 2 to be arranged in the side of operating mechanism 31 and is located at the top of contact mechanism 32, can not only avoid locking Determine mechanism 2 and tripping mechanism 33 is interfered, has the characteristics that structure is simple, and mold cased circuit breaker shell can be efficiently used The function of anti-error closing is realized in interior limited space on the basis of not increasing shell volume.

Specifically, being equipped with operation handle 34, operating mechanism 31 and multipole circuit breaker system, every pole breaker system in shell System include contact mechanism 32, tripping mechanism 33 and wiring mechanism, the contact mechanism 32 of every pole circuit breaker system with operation machine Structure 31 connects, and accesses different phase lines by corresponding wiring mechanism respectively, the tripping mechanism 33 of every pole circuit breaker system Cooperated by draw bar 1 and operating mechanism 31, tripping mechanism 33 makes operating mechanism by draw bar 1 in corresponding phase line failure 31 unlock trippings, make operating mechanism 31 that all contact mechanisms 32 be driven to disconnect all phase lines.Operating mechanism 31 generally includes energy storage Mechanism, locking piece and fastener again, locking piece and again fastener snap lock under the action of stored energy mechanism keep balance, and make energy storage Mechanism keeps energy storage, and draw bar 1 pushes fastener again and locking piece to unlock disequilibrium when fault, and releasing stored energy mechanism can be simultaneously Drive all 32 disconnecting circuits of contact mechanism, at this time to close a floodgate again, then need to make again fastener, locking piece and draw bar 1 to Original position rotates and snap-on is fixed again again, and locking piece 2 stops again fastener to original position rotation, breaker by limit draw bar 1 Also it can not just close a floodgate since operating mechanism 31 is maintained in the state that disequilibrium takes off, after only locking piece 2 avoids draw bar 1, Locking piece and fastener again just can be again together with hasps, and breaker can just close a floodgate, and drive all touchings by operating mechanism 31 All phase lines are connected in head mechanism 32.Certainly, operating mechanism 31 has numerous embodiments as the core of breaker, here not The specific structure of operating mechanism 31 is specifically limited.The above content is the specific preferred embodiments of combination to the invention Made further description is, and it cannot be said that the specific implementation of the invention is only limited to these instructions.For the present invention It creates for person of an ordinary skill in the technical field, without departing from the concept of the premise of the invention, can also make Several simple deduction or replace, all shall be regarded as belonging to the protection scope of the invention.

Claims (14)

1. a kind of mold cased circuit breaker, it is characterised in that: including operating mechanism (31) and tripping mechanism (33), operating mechanism (31) Cooperated by draw bar (1) and tripping mechanism (33), is equipped with the locking piece for limiting draw bar (1) in side, setting is being locked Determine the drive shaft (221) and cam member (23) of part side, and the limit rotary shaft (222) of the locking piece other side is set and is protected Mechanism is protected, drive shaft (221) drives locking piece close to locking draw bar (1), is equipped on locking piece by cam member (23) Long guiding hole (223) and driving are passed through with one end of the long guiding hole (223) of limit rotary shaft (222) cooperation, limit rotary shaft (222) Shaft (221) connection, protection mechanism cover the other end in limit rotary shaft (222) and are slidably matched with locking piece.

2. mold cased circuit breaker according to claim 1, it is characterised in that: further include covering on the outside of drive shaft (221) The position-limit mechanism being fixedly connected with circuit breaker housing.

3. mold cased circuit breaker according to claim 1, it is characterised in that: protection mechanism includes covering in limit rotary shaft (222) outer diameter of the limit plate (261) that outside is slidably matched with locking piece, limit plate (261) is greater than the interior of long guiding hole (223) Diameter is equipped on limit plate (261) and reaches the guide post (262) being slidably matched in long guiding hole (223), in guide post (262) Be equipped with the evacuation through-hole (264) of evacuation limit rotary shaft (222), one end of limit rotary shaft (222) pass through evacuation through-hole (264) with Drive shaft (221) connection, the other end of limit rotary shaft (222) are equipped with the spacing head (225) with evacuation through-hole (264) cooperation, The outer diameter of spacing head (225) is greater than the internal diameter of evacuation through-hole (264).

4. mold cased circuit breaker according to claim 3, it is characterised in that: the protection mechanism further includes covering in spacing head (225) one end of the protection sleeve (267) on the outside of, protection sleeve (267) is connect with limit plate (261), the other end and limit sleeve (263) connection is covered, protection sleeve (267), limit upper shield (263) and limit plate (261) are trapped among the surrounding of spacing head (225).

5. mold cased circuit breaker according to claim 3, it is characterised in that: the protection mechanism further includes covering to turn in limit Spring washer (265) and plain cushion (266) on the outside of axis (222) between spacing head (225) and limit plate (261), spring washer (265) position In the top of plain cushion (266).

6. mold cased circuit breaker according to claim 2, it is characterised in that: the position-limit mechanism includes covering in drive shaft (221) the fore shaft sleeve (226) on the outside of is equipped with the limit with circuit breaker housing limit cooperation in the side of fore shaft sleeve (226) Convex block (2264), the bottom end of drive shaft (221) are equipped with the connecting shaft (231) of squarely, and connecting shaft (231) stretches out fore shaft sleeve (226) bottom is connect with cam member (23), drive shaft (221) connecting shaft (231) top and fore shaft sleeve (226) it Between outer circumference be equipped with circlip mounting groove (257), be equipped in circlip mounting groove (257) circularize and with fore shaft sleeve (226) circlip (253) of end face limit cooperation.

7. mold cased circuit breaker according to claim 6, it is characterised in that: the outside of the fore shaft sleeve (226) is equipped with The spacing collar (252) circularized, spacing collar (252), which is covered, to be connected to fore shaft sleeve (226) and is broken on the outside of fore shaft sleeve (226) The connection of road device shell, sets that there are two the card slots (2261) that are oppositely arranged in the bottom of spacing collar (252), in fore shaft sleeve (226) The fore shaft groove (2262) cooperated respectively with two card slots (2261) there are two being set on the two sides of circumference, in fore shaft sleeve (226) Inside be equipped with simultaneously with card slot (2261) and fore shaft groove (2262) limit cooperate connector.

8. mold cased circuit breaker according to claim 7, it is characterised in that: the top side of the spacing collar (252) and open circuit Sealing ring (251) are equipped between device shell, sealing ring (251) is from outer ring to inner ring tapered inclination gradually downward, in spacing collar (252) top is equipped with the positive stop lug boss (2263) cooperated with sealing ring (251) inner ring surrounding.

9. mold cased circuit breaker according to claim 7, it is characterised in that: the width of the spacing collar (252) by up to Under tapered be gradually reduced.

10. mold cased circuit breaker according to claim 6, it is characterised in that: the side of the circlip (253) is equipped with and allows drive Circlip that turn axis (221) passes through is open (254), sets that there are two towards circlip on the inner ring ring wall of circlip (253) other side The circlip groove (255) of opening (254) setting.

11. mold cased circuit breaker according to claim 1, it is characterised in that: draw bar (1) includes and operating mechanism (31) The operation portion (11) of cooperation, the tripping portion (12) with tripping mechanism (33) cooperation, and be arranged with tripping portion (12) in draw bar (1) first sticking department (131) of the same side, the first sticking department (131) and tripping portion (12) interval are arranged, and locking piece setting is the Side of one sticking department (131) far from tripping mechanism (33), locking piece are equipped with the locating part (21) of l-shaped, the first sticking department (131) it is located at the inside of locating part (21), locating part (21) pulls the first sticking department (131) locking draw bar (1).

12. mold cased circuit breaker according to claim 1, it is characterised in that: draw bar (1) includes and operating mechanism (31) The operation portion (11) of cooperation, the tripping portion (12) with tripping mechanism (33) cooperation, and be oppositely arranged on and lead with tripping portion (12) Draw second sticking department (132) of bar (1) two sides, one far from tripping mechanism (33) in the second sticking department (132) is arranged in locking piece Side, locking piece, which is equipped with, pushes the second sticking department with the second sticking department (132) spaced locating part (21), locating part (21) (132) draw bar (1) is locked.

13. mold cased circuit breaker according to claim 11 or 12, it is characterised in that: locking piece includes and draw bar (1) The locating part (21) of cooperation and the box body (24) for covering the cooperation on the outside of cam member (23), locating part (21) are the overhead kick part of L-type, It includes two vertically disposed sides and the bending part that is connected between two sides, one end and box body (24) of overhead kick part Connection, the other end and draw bar (1) cooperate；The drive shaft (221) is vertical with cam member (23) to be connect, drive shaft (221) moving direction with locating part (21) is vertically arranged；Cam member (23) is made of the protrusion of three equal parts, drive shaft (221) it is connect with the corner position of two of them protrusion junction.

14. -12 any mold cased circuit breaker according to claim 1, it is characterised in that: be equipped with operation handle in shell (34), multipole circuit breaker system, every pole circuit breaker system include contact mechanism (32), tripping mechanism (33) and wiring mechanism, The contact mechanism (32) of every pole circuit breaker system is connect with operating mechanism (31), and is connect respectively by corresponding wiring mechanism Enter different phase lines, the tripping mechanism (33) of every pole circuit breaker system is cooperated by draw bar (1) and operating mechanism (31), tripping Mechanism (33) makes operating mechanism (31) unlock tripping by draw bar (1) in corresponding phase line failure, makes operating mechanism (31) All contact mechanisms (32) are driven to disconnect all phase lines, locking piece is arranged the side in operating mechanism (31) and is located at contact machine The top of structure (32)；Operating mechanism (31) includes stored energy mechanism, locking piece and fastener again, and locking piece and again fastener are in stored energy mechanism Under the action of snap lock keep balance, and stored energy mechanism is made to keep energy storage, when fault draw bar (1) push again fastener with Locking piece unlocks disequilibrium, releases stored energy mechanism and can and drive all contact mechanisms (32) disconnecting circuit, then fastener, locking piece With draw bar (1) to original position rotate and again again snap lock when, locking piece by limit draw bar (1) blocking again fastener to Original position rotation, when locking piece avoids draw bar (1), snap lock, operating mechanism (31) are driven again for locking piece and again fastener All phase lines are connected in all contact mechanisms (32).