CN206758380U - Low-voltage circuit breaker - Google Patents
Low-voltage circuit breaker Download PDFInfo
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- CN206758380U CN206758380U CN201720557132.3U CN201720557132U CN206758380U CN 206758380 U CN206758380 U CN 206758380U CN 201720557132 U CN201720557132 U CN 201720557132U CN 206758380 U CN206758380 U CN 206758380U
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Abstract
A kind of low-voltage circuit breaker, belong to low voltage electrical apparatus technology field.Including a housing, the bridge contact system being arranged in housing and an operating mechanism for contacting or separating with bridge contact system, the operating mechanism includes a handle linkage for being used to activate bridge contact system acting, operating mechanism also includes one and is used to make the handle linkage produce the separating brake servicing unit for forming the bridge contact system separating brake trend, and the separating brake servicing unit is connected between the housing and the handle linkage.Due to being additionally arranged separating brake servicing unit in the structural system of operating mechanism, thus released energy during breaking separating brake by the separating brake servicing unit, and energy is absorbed during breaker closing, so as to ensure to improve breaker open operation speed and to have found rational equalization point between the harsh intensity of operating mechanism, the requirement of strength design to operating mechanism is significantly reduced, eliminates and restricts breaker miniaturization, the restraining factors of modularized design.
Description
Technical field
The utility model belongs to low voltage electrical apparatus technology field, and in particular to a kind of breaker.
Background technology
As is known in the industry, the effect of low-voltage circuit breaker is protection circuit, when detect fault current be present on circuit when, just
Circuit is automatically opened up, is separated each other by the dynamic/static contact of the structural system of the contact system of breaker, the failure in disjunction circuit
Electric current, reach the purpose of protection circuit.And then as is known in the industry, released energy using the main spring in operating mechanism to embody point
Disconnected (separating brake) speed and prevent that it is that the important technology for considering breaker open operation speed refers to be opened rear moving contact by electrodynamic repulsion force reprimand and fallen after rise
One of mark.
Fig. 1 be prior art in breaker bridge contact system structure chart, the contact of the structural system of the contact system 2
Spring 23 is arranged between Shell of circuit breaker (not shown) and moving contact 21, and moving contact 21 is provided by the touch spring 23
One active force to the direction of static contact 22 and the stationary contact 221 for using the movable contact 211 and the static contact 22 that ensure moving contact 21
Between normal ON.As shown in Figure 1, moving contact run-on tab 24 is configured with moving contact 21, the moving contact run-on tab 24
Both ends extend respectively to the lower section corresponding to arc extinguishing grid pieces 26, and the static contact run-on tab 25 of static contact 22 is extended to corresponding to both sides
Arc extinguishing grid pieces 26 top.When there is the fault current as caused by overload, short circuit etc. in circuit, foregoing moving contact 21
Separated with static contact 22, specifically, foregoing movable contact 211 and stationary contact 221 separate, in movable contact 211 and stationary contact 221
The arc of electric arc caused by separated moment avoids electric arc pair with jumping to moving contact run-on tab 24 and static contact run-on tab 25
Dynamic and static contact 211,221 ablations.Meanwhile introduced electric arc in arc-chutes by dynamic and static contact run-on tab 24,25, by arc-chutes
Foregoing arc extinguishing grid pieces 26 to electric arc split until extinguish.
Breaker is further equipped with the operating mechanism for activating the action of contact system 2, and operating mechanism is typically by handle and connecting rod
Mechanism is formed, and it includes tiller, main spring, tripping, lock, draw bar and made for the contact support 27 with contact system
Rotating shaft bar etc..
From fig. 1, it can be seen that when contact system is in gate-dividing state, touch spring 23 is acted on moving contact 21, makes moving contact
21 are contacted with contact support 27, and upward directed force F is provided to moving contact 21 and contact support 27t, to keep contact system
Gate-dividing state, the effect end on handle linkage transfer axostylus axostyle contact with contact support 27, overcome touch spring power, keep dynamic
Stationary contact released state.Contact system 2 applies a reaction force to handle linkage, even if handle linkage is to combined floodgate side
To the opplied moment of motion.When breaker is closed a floodgate, driving handle lever, operating mechanism main spring is set to act on upper connecting rod
Torque is changed into counterclockwise, and handle linkage is moved to "on" position, i.e., the effect end on rotating shaft bar is moved upwards, moves and touches
First 21 move upwards with contact support 27 under the effect of touch spring 23, make sound contact, meanwhile, touch spring provides dynamic
Contact between stationary contact.In order to ensure breaker over-travel, operating mechanism separates with contact system, i.e., in operating mechanism
Be used for activate contact system 2 action rotating shaft bar rotating shaft bar effect end and contact support 27 between be provided with a gap.
Fig. 2 show work of the contact system 2 to operating mechanism of the breaker of the contact system 2 with structure shown in Fig. 1
Firmly schematic diagram.In "on" position, contact system is with operating mechanism without opplied moment, when breaker carries out separating brake, rotating shaft bar
On effect end move downward, when rotating shaft bar rotated certain angle, its act on end cover with behind the gap of contact support 27, with
Contact support 27 contacts, in contact but when will separate (at the time of the contact that Fig. 2 abscissas represent), handle and connecting rod
The opplied moment of touch spring 23 is born by mechanism, and then, handle linkage overcomes touch spring power, promote contact support 27 with
Moving contact 21 moves to contact opening direction, and in the process, contact system 2 is by contact support 27 to handle linkage
Produce the moment of reaction.This torque linearly increases as touch spring decrement increases, until breaker reaches separating brake stabilization
Position.To ensure the stability of breaker open operation state, the contact opening side that now handle linkage is provided contact system
To torque should be greater than touch spring offer contact closure direction torque, be usually arranged as more than 2 times.And operating mechanism master
Spring, which releases energy, absorbs the difference of energy with touch spring, determines the opening velocity of breaker.In Fig. 2, abscissa is to turn
The angle that axostylus axostyle turns over, ordinate are torque of the touch spring equivalent action on rotating shaft bar, and the area that curve is enclosed is dynamic
The energy that spring absorbs or discharged during work.From above-mentioned Analysis on action mechanism, separated in movable contact 211 with stationary contact 221
During, touch spring 23 absorbs energy, i.e., produces resistance during moving contact 21 separates with static contact 22, thus can be
The separating rate of movable contact 211 and stationary contact 221 is influenceed to a certain extent.On the premise of breaker open operation speed is ensured, machine
The energy that structure main spring discharges during divide-shut brake would become hard to reduce, and breaker is in making process, mechanism main spring with
Touch spring releases energy simultaneously, and mechanism main spring releases energy, and operating mechanism is moved to closing position direction, while contact
Spring releases energy, and promotes moving contact part to be moved to contact closure direction, the breaker operator machine that driving moving contact 21 acts
The energy of the main spring release of structure is together with the energy supposition that touch spring 23 discharges, and these energy are except completion breaker actuation
Outside, remaining energy will be switched off device absorption in a manner of spacing collision, will so greatly increase breaker particularly handle and connect
The design of linkage structural strength, technology barrier also is formed to the Miniaturization Design of breaker, specifically, ensureing operation machine
It is difficult to obtain desired equalization point between sufficient intensity and breaker the volume miniaturization of structure and raising opening velocity.
For above-mentioned prior art, it is necessary to improved, for this, the applicant has made beneficial design, and forms
Technical scheme described below.
The content of the invention
Task of the present utility model is that providing one kind had not only been favorably improved opening velocity but also had advantageously reduced to operation machine
The intensity of structure and the low-voltage circuit breaker for being beneficial to meet the miniaturization and modularized design requirement to breaker.
What task of the present utility model was performed by, a kind of low-voltage circuit breaker, including a housing, be arranged in housing
A bridge contact system and an operating mechanism for contacting or separating with bridge contact system, the operating mechanism include one be used for cause
The handle linkage of dynamic bridge contact system acting, the operating mechanism also include one and are used to make the handle linkage
The separating brake servicing unit that separating brake trend is formed to the bridge contact system is produced, the separating brake servicing unit is connected to the housing
Between the handle linkage.
In a specific embodiment of the present utility model, described handle linkage includes a rotating shaft bar, this turn
Axostylus axostyle is rotatably arranged in the housing, and has a rotating shaft bar towards one end of the bridge contact system in the rotating shaft bar
End is acted on, the separating brake servicing unit is connected between the housing and the rotating shaft bar so that the rotating shaft bar effect end production
It is raw that separating brake trend is formed to the bridge contact system.
In another specific embodiment of the present utility model, the rotating shaft bar acts on the one of end away from the rotating shaft bar
End composition has a rotating shaft bar hinged end, and described separating brake servicing unit is an extension spring, and one end of the extension spring is positioned at the housing
On, and the other end is positioned on rotating shaft bar hinged end.
In another specific embodiment of the present utility model, the shape of the rotating shaft bar is in " ＞ " shape, the rotating shaft bar
Middle part is be hinged on the housing by rotating shaft bar jointed shaft.
In another specific embodiment of the present utility model, described handle linkage is also in including a shape
The toggle connecting rod of " ＜ " shape, described rotating shaft bar pass through the rotating shaft bar hinged end and toggle rod hinge connection.
In an also specific embodiment of the present utility model, on described housing and corresponding to described turn
The position in the left side of axostylus axostyle hinged end is provided with a rotating shaft bar hinged end limit shaft.
Of the present utility model more and in a specific embodiment, described handle linkage also includes one handle thick stick
Bar, a main spring, a tripping, a lock and a draw bar, tiller hub setting is in the operation for setting the operating mechanism
On mechanism rack, toggle connecting rod includes a upper connecting rod and a lower link, and upper end and the tripping of upper connecting rod are hinged, the lower end of upper connecting rod
It is hinged by one end of rod hinge connection axle and lower link, the middle part of the rotating shaft bar is hinged on the behaviour by rotating shaft bar jointed shaft
To make on mechanism rack, the rotating shaft bar hinged end of rotating shaft bar is hinged by the other end of rotating shaft bar hinged end jointed shaft and lower link,
One end of main spring is hung to be hung on the rod hinge connection axle in the top of tiller, the other end of main spring, and tripping is led to
The hub setting of tripping axle is crossed on the operating mechanism support and with latching hasp, lock hinge be located on operating mechanism support and with
Draw bar hasp, draw bar equally hinge are located on operating mechanism support, and one end of the extension spring is positioned at by extension spring fixed column
On the housing, and the other end is positioned on the rotating shaft bar hinged end jointed shaft.
In an of the present utility model and then specific embodiment, described bridge contact system include contact support,
A pair of static contacts for being separately positioned on contact support both sides, the moving contact being located in contact support and be located at the housing with
Touch spring between moving contact, moving contact have a pair of movable contacts, and this is to movable contact and the stationary contact phase on a pair of static contacts
Corresponding, touch spring provides an active force moved to static contact direction to moving contact.
Of the present utility model and more and in a specific embodiment, described housing includes being used to house the operation
The upper shell of mechanism and the pedestal for housing the bridge contact system, upper shell and pedestal snap fit, the bottom of upper shell
Portion has opening, and when the rotating shaft bar pivots, the rotating shaft bar effect end is located in opening and separated with bridge contact system
Or lean out the opening and push bridge contact system.
Technical scheme provided by the utility model due to being additionally arranged separating brake servicing unit in the structural system of operating mechanism,
Thus released energy during breaking separating brake by the separating brake servicing unit, and energy is absorbed during breaker closing, from
And ensuring to improve breaker open operation speed and to have found rational equalization point between the harsh intensity of operating mechanism, significantly drop
The low requirement of strength design to operating mechanism, eliminate and restrict breaker miniaturization, the restraining factors of modularized design.
Brief description of the drawings
Fig. 1 is the structure chart of the breaker contact system in prior art.
Fig. 2 is opplied moment schematic diagram of the contact system to handle linkage of the breaker with structure shown in Fig. 1.
Fig. 3 is that the example structure of the utility model low-voltage circuit breaker and contact system are in and are detaining the signal of gate-dividing state
Figure.
Fig. 4 is the schematic diagram that the example structure of the utility model low-voltage circuit breaker and contact system are in "on" position.
Fig. 5 is the schematic diagram that the example structure of the utility model low-voltage circuit breaker and contact system are in trip status.
The opplied moment shape that Fig. 6 is the handle linkage of low-voltage circuit breaker of the present utility model and prior art compares
Condition schematic diagram.
Fig. 7 is the upper shell bottom schematic view of low-voltage circuit breaker of the present utility model.
Embodiment
Fig. 3 to Fig. 5 is referred to, the bridge contact system 2 for show the housing 1 of low-voltage circuit breaker, being arranged in housing 1
With an operating mechanism 3 that can be contacted or separate with bridge contact system 2, and a trip gear is also show in figures 4 and 5
4。
Foregoing bridge contact system 2 includes moving contact 21, static contact 22, touch spring 23 and contact support 27, moves and touches
First 21 have a pair of movable contacts 211 with two movable contacts 211, static contact 22 to set up a pair in the both sides of contact support 27 separately,
Each static contact 22 has a stationary contact 221, and foregoing a pair of movable contacts 211 are corresponding with two stationary contacts 221, specifically,
Fig. 3 to Fig. 5 shows a pair of separable dynamic and static contacts 211,221, and contact system 2 is the parallel double-breakpoint structure of bridge-type, contact
Spring 23 is disposed between housing 1 and moving contact 21, and an active force moved to the direction of static contact 22 is provided to moving contact 21,
Ensure the normal ON between dynamic and static contact 211,221, moving contact run-on tab 24 is configured with below moving contact 21, this is dynamic tactile
The both ends of head run-on tab 24 extend respectively into the lower section of the arc extinguishing grid pieces 26 corresponding to both sides, the static contact run-on tab of static contact 22
25 extend to the top of the arc extinguishing grid pieces 26 corresponding to both sides.When the failure electricity as caused by overload, short circuit etc. occurs in circuit
During stream, foregoing moving contact 21 and the quick separating of static contact 22, specifically, foregoing movable contact 211 and stationary contact 221 are quick
Separate, when movable contact 211 separates with stationary contact 221, the arc of caused electric arc is with jumping to moving contact run-on tab 24 and quiet
Contact run-on tab 25, ablation of the electric arc to dynamic and static contact 211,221 is avoided, meanwhile, by dynamic and static contact run-on tab 24,25 by electricity
Arc is introduced in arc-chutes, by the foregoing arc extinguishing grid pieces 26 in arc-chutes by electric arc Fast Segmentation.
Foregoing operating mechanism 3 includes one handle linkage 31, and it, which is used to activating bridge contact system 2, acts, as
The technical essential of technical scheme provided by the utility model：Also include the use set up in the structural system of operating mechanism 3
The separating brake servicing unit 32 to foregoing bridge contact system 2 formation separating brake trend, the separating brake are produced in making handle linkage 31
Servicing unit 32 is connected between foregoing housing 1 and foregoing handle linkage 31.
Specifically, the handle linkage 31 includes a rotating shaft bar 311, and the rotating shaft bar 311 is rotatably arranged in housing 1,
And have one to be used to activate the action of bridge contact system 2 towards one end of foregoing bridge contact system 2 in the rotating shaft bar 311
Rotating shaft bar acts on end 3111, and separating brake servicing unit 32 is connected between housing 1 and rotating shaft bar 311, rotating shaft bar is acted on end 3111
Produce and separating brake trend is formed to bridge contact system 2, be i.e. separating brake servicing unit 32 is acted on rotating shaft bar 311 so that rotating shaft bar
Act on the trend that end 3111 produces the separating brake of actuating bridge contact system 2.
Preferably, Fig. 3 to Fig. 5 is seen, the one end of aforementioned rotation axis bar 311 away from aforementioned rotation axis bar effect end 3111, which is formed, one
Rotating shaft bar hinged end 3112, foregoing separating brake servicing unit 32 are an extension spring, and one end of the extension spring is positioned on housing 1, and another
One end is positioned on rotating shaft bar hinged end 3112.
As shown in Fig. 3 to Fig. 5, the middle part of aforementioned rotation axis bar 311 is hinged on operating mechanism by rotating shaft bar jointed shaft 3114
On support 318 or it is hinged on foregoing housing 1, on housing 1 and corresponding to aforementioned rotation axis bar hinged end 3112
The position in left side (by taking shown position state as an example) be provided with a rotating shaft bar hinged end limit shaft 11, the rotating shaft bar hinged end
Limit shaft 11 is fixed on housing 1 or on operating mechanism support 318.
In the present embodiment, the shape of aforementioned rotation axis bar 311 is generally in " ＞ " shape.
As shown in Figure 4, during "on" position, under the effect of touch spring 23, holding contacts moving contact 21 with static contact 22, this
When, operating mechanism 3 separates with contact system 2, in order to ensure breaker over-travel, the rotating shaft bar effect end 3111 of rotating shaft bar 311 with
Gap is provided between contact support 27, the rotating shaft bar effect end 3111 of rotating shaft bar 311 does not act to contact system 2, so
And when operating mechanism 3 carries out sub-switching operation, the rotating shaft bar effect end 3111 of rotating shaft bar 311 contacts with bridge contact system 2, i.e.,
Rotating shaft bar effect end 3111 promotes moving contact 21 to overcome the spring force of touch spring 23 to be moved to separating brake direction.When operating mechanism 3
When carrying out closing operation, 311 position as shown in Figure 3 of rotating shaft bar rotates clockwise, and rotating shaft bar 311 still connects with bridge contact system 2
Touch, still, now discharge the pushing to the moving contact 21 of contact system 2 for rotating shaft bar effect end 3111, moving contact 21 is in contact
Move under the spring-force driven dual of spring 23, contacted with static contact 22 upwards, i.e., dynamic and static contact 211,221 contacts.
Continue to see Fig. 3 to Fig. 5, foregoing handle linkage 31 also includes one handle lever 312, toggle connecting rod 313, master
Spring 314, tripping 315, lock 316 and draw bar 317, tiller 312 are installed on the behaviour for setting aforementioned operation mechanism 3
Make on mechanism rack 318 and with block chalaza 3121 as centre of gyration rotary oscillation, toggle connecting rod 313 is by a upper connecting rod 3131
It is in the structure of " ＜ " shape with the shape that a lower link 3132 is formed, the upper end of upper connecting rod 3131 and tripping 315 are be hinged, upper connecting rod
3131 lower end is hinged by one end of rod hinge connection axle 31311 and lower link 3132, and the rotating shaft bar of aforementioned rotation axis bar 311 is hinged
End 3112 is hinged by the other end of rotating shaft bar hinged end jointed shaft 3113 and lower link 3132, and one end of main spring 314 is hung
At the top of tiller 312, the other end of main spring 314 is hung on foregoing rod hinge connection axle 31311, and tripping 315 passes through
For the hub setting of tripping axle 3151 on aforementioned operation mechanism rack 318 and with latching 316 hasps, the hinge of lock 316 is located at operating mechanism
It is located on support 318 and with the hasp of draw bar 317, the equally hinge of draw bar 317 on operating mechanism support 318.Foregoing separating brake is auxiliary
Device 32 i.e. one end of extension spring is helped to be positioned at by extension spring fixed column 13 on foregoing housing 1, and the other end is positioned at aforementioned rotation axis
On bar hinged end jointed shaft 3113, for extension spring fixed column 13 positioned at being arranged on housing 1, extension spring countershaft bar 311 applies one
Rotating torque, the torque push contact system to make rotating shaft bar act on end 3111, that is to say, that the torque is to make dynamic and static contact
21st, the torque of 22 generation opening direction.Separating brake servicing unit 32 is that extension spring is acted on rotating shaft bar 311 so that rotating shaft bar acts on
End 3111 produces the trend of the separating brake of actuating bridge contact system 2.
As shown in Figure 3, when breaker be in detain gate-dividing state when, lock 316 with the hasp of draw bar 317, tripping 315 and
316 hasps are latched, upper connecting rod 3131, lower link 3132, rotating shaft bar 311 form stable quadric chain, the master of operating mechanism
Spring 314 applies clockwise torque to upper connecting rod 3131, by upper connecting rod 3131, the cooperation of lower link 3132, lower company
The countershaft bar 311 of bar 3132 is applied with the torque for rotating in an anti-clockwise direction rotating shaft bar 311, while separating brake servicing unit 32 is drawn
Spring countershaft bar 311, which applies, makes the torque that rotating shaft bar 311 rotates in an anti-clockwise direction, the rotating shaft bar effect end 3111 of rotating shaft bar 311
Contacted with the moving contact rack of contact system 2 and keep pushing, overcome the power of touch spring 23, kept at dynamic and static contact 21,22
In released state.
The process that breaker is closed a floodgate is：In Fig. 3 states, driving handle lever 312 rotates clockwise, in operating mechanism
Main spring 314 in the presence of upper connecting rod 3131 rotate in an anti-clockwise direction, pass through upper connecting rod 3131, lower link 3132, band turn
Axostylus axostyle 311 is rotated axostylus axostyle jointed shaft 3114 and rotated clockwise with rotating shaft bar jointed shaft 3114 for center of rotation, is overcome
Separating brake servicing unit 32 is to overcome the active force of extension spring countershaft bar 311, rotating shaft bar 311 rotationally clockwise while,
Its rotating shaft bar effect end 3111 releases the pushing effect to the moving contact 21 of contact system 2, and moving contact 21 is made in touch spring 23
Under, being contacted with static contact 22, i.e., dynamic and static contact 211,221 contacts, when sound contact collision rift, moving contact 21 and contact branch
Seat 27 is by the spacing stop motion of static contact, and handle linkage 31 continues to move, i.e. rotating shaft bar 311 continues to rotate clockwise,
Rotating shaft bar 311 is set to be separated with the moving contact bearing 27 of bridge contact system 2, upper connecting rod 3131 is spacing by main spring 314, such as Fig. 4
It is shown.
In Fig. 4 "on" position, foregoing main spring 314 applies counter clockwise direction torque to upper connecting rod 3131, by upper
Connecting rod 3131, the application of the countershaft bar 311 of lower link 3132 make the torque that rotating shaft bar 311 rotates clockwise, overcome separating brake
Servicing unit 32 is the counter clockwise direction torque that extension spring applies to axostylus axostyle 311, operating mechanism is kept "on" position, rotating shaft bar
311 separate with bridge contact system 2, and moving contact 21 contacts in the presence of touch spring 23 with static contact 22, i.e., dynamic and static to touch
Point 211,221 is in contact with each other, and keeps breaker closing state.
Breaker open operation process is the inverse process of making process, when closing position of the breaker in normal work, lock
316 with the hasp of draw bar 317, tripping 315 with lock 316 hasps, upper connecting rod 3131, lower link 3132, rotating shaft bar 311 are formed surely
Fixed quadric chain, the driving handle lever 312 in Fig. 4 positions, main spring 314 is driven to press toward upper connecting rod 3131, in main spring
In 314 action process, main spring 314 gradually extends and stores energy, this process quadric chain remains stationary state, when main bullet
Spring 314 presses through and (crossed) position of upper connecting rod 3131, and quadric chain starts to act in the presence of main spring 314, is specially：
Upper connecting rod 3131 rotates under the pulling force effect of main spring 314, and upper connecting rod 3131 drives lower link 3132 to act, and lower link 3132 is drawn
Turn axostylus axostyle 311 rotates axostylus axostyle jointed shaft 3114 as the centre of gyration and rotated counterclockwise in position shown in Fig. 4, makes rotating shaft bar 311
On effect end 3111 move downward, collided after covering gap with contact support 27, the dynamic of rotating shaft bar 311 and contact system 2 touches
Head support bar contact, the moving contact support bar of contact system 2 is then progressively pushed, overcome the power of touch spring 23, make dynamic and static touch
First 21,22 separation, eventually arrive at and are maintained at gate-dividing state.Because separating brake servicing unit 32 is that extension spring acts on rotating shaft bar 311,
Countershaft bar 311, which is applied with one, makes it cause rotating shaft bar effect end 3111 to have actuating contact system at breaker any moment
Unite the trend (being applied with one as shown in Figure 4 so that the torque that rotating shaft bar 311 rotates in an anti-clockwise direction) of 2 separating brakes, extension spring is disconnected
Released energy during the device separating brake of road, improve breaker open operation speed, while reduce the design strength requirement of operating mechanism,
Be advantageous to the Miniaturization Design of breaker.After increasing separating brake servicing unit 32, during breaker on/off switch, operating mechanism stress
As shown in Figure 6.
In Fig. 4 "on" position, when circuit malfunctions where breaker, trip gear 4 makes the hand of operating mechanism
The lock 316 of the structural system of handle linkage 31, tripping 315 unlock, main spring 314 by tripping 315, upper connecting rod 3131,
Lower link 3132 and the bar linkage structure countershaft bar 311 of rotating shaft bar 311 5 apply counter clockwise direction torque, and separating brake servicing unit 32 is
Extension spring countershaft bar 311 applies counter clockwise direction torque, rotates in an anti-clockwise direction rotating shaft bar 311, makes the work on rotating shaft bar 311
3111 moved downward with end, collided after covering gap with contact support 27, overcome the power of touch spring 23, promote moving contact 21 to
Separating brake direction is moved, and eventually arrives at Fig. 5 circuit breaker tripping state, and rotating shaft bar 311 is spacing by rotating shaft bar hinged end limit shaft 11,
Trip status are kept, because separating brake servicing unit 32 is that extension spring releases energy during circuit breaker tripping, thus improves and resolves
Road device opening velocity.
It is change (differentiation) process by Fig. 5 to Fig. 3 that breaker snaps through journey again, driving handle lever 312, makes operation machine
The tripping 315 of structure is contacted with lock 316 and detained again, and rotating shaft bar 311 is in extension spring power and the main bullet that separating brake servicing unit 32 is in spring
Under the active force of spring 34, contact of breaker part gate-dividing state is kept.
Applicant it should be noted that：Foregoing separating brake servicing unit 32 of the present utility model is that extension spring is not limited to above-mentioned setting
Mode, as long as its one end is fixed, the other end can hang position and the rotating shaft bar effect end 3111 of rotating shaft bar 311 and set up separately in rotating shaft bar
311 centers of rotation are the both sides of rotating shaft bar jointed shaft 3114, belong to technical connotation category disclosed in the utility model.Especially,
Separating brake servicing unit 32 is not limited to the form or torsion spring, stage clip of foregoing extension spring, as long as can countershaft bar 311 apply
One torque so that trend of the rotating shaft bar effect end 3111 with the actuating separating brake of contact system 2, which all should be worked as, belongs to the utility model
Category.
Refer to Fig. 6, in Fig. 6, abscissa is the angle that rotating shaft bar 311 turns over, and ordinate is that spring equivalent action is turning
Torque on axostylus axostyle 311, the area that curve is enclosed are the energy that spring absorbs or discharged in action process.Separating brake servicing unit
32, released energy in breaker open operation process, absorb energy in breaker closing process, preferred embodiment, connected using one end
Connecting handle operating mechanism 31, the extension spring that one end is fixed on housing 1 realize that making process spring elongation, separating brake process spring contracts
Short, according to spring equation, F=k Δ x, spring force and spring elongation or the linear ratio of shortening amount, therefore closing position extension spring power is big
In open position extension spring power, it is preferred that extension spring power is arranged to, equivalent action to rotating shaft bar 311, open position extension spring countershaft bar
311 opplied moment is equal or close with the opplied moment of the countershaft bar 311 of touch spring 23.Axis of abscissas top is used in figure
Dotted line represent extension spring 32 to the opplied moment of handle linkage 31.Therefore, after separating brake servicing unit 32 is added, operation
The part of the removing separating brake servicing unit 32 of mechanism is handle linkage 31 (namely operating mechanism described in the prior art)
Institute's stress extension spring 32 and the resultant moment of touch spring 23, in Fig. 6, represented using the solid line on axis of abscissas top.
When contact system 2 contacts with handle linkage 31, the making a concerted effort of separating brake servicing unit 32 and touch spring 23 (with
Lower abbreviation is made a concerted effort) handle linkage 31 is provided make the opplied moment of contact opening direction.When breaker carries out separating brake, need
The torque of contact opening direction to be provided by mechanism main spring 314, due to the torque for making a concerted effort also to provide contact opening direction, is being divided
During lock, with joint efforts therefore effect, in the case where ensureing breaker open operation speed, can reduce operating mechanism to release energy
The energy that main spring 314 discharges.In breaker open operation position, with joint efforts close to zero, mechanism main spring 314 need to provide less drive
Kinetic moment, it is possible to keep breaker in the stability of open position.Breaker provides contact and opened with joint efforts in making process
The torque in direction, operating mechanism main spring 314 need to overcome resultant moment, breaker is moved to combined floodgate direction, in the process, machine
Structure main spring releases energy, and to absorb energy, the energy of absorption will be used in breaker open operation action next time effect with joint efforts,
Reduce the energy that device absorption is switched off in a manner of spacing collision.To sum up, in the whole action process of breaker and breaker point
Under two stable states closed a floodgate, due to adding separating brake servicing unit 32, reduce the energy of the release of mechanism main spring 314,
The requirement of strength design of main spring is reduced, meanwhile, reduce handle linkage 31 and touched in whole action process with spacing
The mode hit is switched off the energy of device absorption, so as to reduce the requirement of circuit breaker operation mechanism Structural Strength Design, is advantageous to break
The miniaturization of road device, modularized design.
In addition, the utility model is preferably, housing 1 includes upper shell 14 and pedestal 12, and described operating mechanism 3 is arranged on
In upper shell 14, i.e., above-mentioned tiller 312, main spring 314, tripping 315, lock 316, draw bar 317 and rotating shaft bar
311st, separating brake servicing unit 32, rotating shaft bar hinged end limit shaft 11 are arranged in upper shell 14, described bridge contact system 2
It is arranged in pedestal 12, wherein touch spring 23 is arranged between pedestal 12 and moving contact 21, and upper shell 14 passes through with pedestal 12
Known fixed structure such as snap fit is fastened by screw assembly.
Refer to Fig. 7 and combine Fig. 3 to Fig. 5, the bottom of foregoing upper shell 14 has opening 110, in rotating shaft bar 311
During pivot, the rotating shaft bar effect end 3111 is located in opening 110 and separates or lean out the opening with bridge contact system 2
110 push bridge contact systems 2, and specifically, during "on" position, operating mechanism 3 separates with contact system 2, now rotating shaft bar
Effect end 3111 is located in opening 110, and the rotating shaft bar effect end 3111 of rotating shaft bar 311 has gap with contact support 27；But
When operating mechanism 3 carries out sub-switching operation, the rotating shaft bar effect end 3111 of rotating shaft bar 311 leans out the opening 110 and bridge contact
System 2 contacts, and promotes moving contact 21 to overcome the spring force of touch spring 23 to be moved to separating brake direction.When operating mechanism 3 is closing a floodgate
In operating process, rotating shaft bar effect end 3111 still leans out the opening 110, but now discharges the moving contact 21 to contact system 2
Pushing.By the way that housing is divided into upper shell 14 and pedestal 12, the operating mechanism 3 of breaker and bridge contact system 2 are divided
Not Gou Cheng two independent modules, realize the modularized design of low-voltage circuit breaker, assembling is convenient, improves efficiency.
Claims (9)
1. a kind of low-voltage circuit breaker, including a housing (1), the bridge contact system (2) that is arranged in housing (1) and one and bridge
Formula contact system (2) contacts or the operating mechanism (3) of separation, and the operating mechanism (3) includes one and is used to activate bridge contact system
(2) handle linkage (31) of action, it is characterised in that the operating mechanism (3) also includes one and is used to connect the handle
Linkage (31) produces the separating brake servicing unit (32) that separating brake trend is formed to the bridge contact system (2), separating brake auxiliary
Device (32) is connected between the housing (1) and the handle linkage (31).
2. low-voltage circuit breaker according to claim 1, it is characterised in that described handle linkage (31) includes one turn
Axostylus axostyle (311), the rotating shaft bar (311) are rotatably arranged in the housing (1), and in the rotating shaft bar (311) towards the bridge
One end of formula contact system (2) has rotating shaft bar effect end (3111), and the separating brake servicing unit (32) is connected to the shell
Between body (1) and the rotating shaft bar (311) so that rotating shaft bar effect end (3111) is produced to the bridge contact system
(2) separating brake trend is formed.
3. low-voltage circuit breaker according to claim 2, it is characterised in that the rotating shaft bar (311) is made away from the rotating shaft bar
Being formed with the one end at end (3111) has a rotating shaft bar hinged end (3112), and described separating brake servicing unit (32) is an extension spring, should
One end of extension spring is positioned on the housing (1), and the other end is positioned on rotating shaft bar hinged end (3112).
4. the low-voltage circuit breaker according to Claims 2 or 3, it is characterised in that the shape of the rotating shaft bar (311) is in " ＞ "
Shape, the middle part of the rotating shaft bar (311) are hinged on the housing (1) by rotating shaft bar jointed shaft (3114).
5. low-voltage circuit breaker according to claim 3, it is characterised in that described handle linkage (31) also includes one
Shape is in the toggle connecting rod (313) of " ＜ " shape, and described rotating shaft bar (311) passes through the rotating shaft bar hinged end (3112) and toggle
Connecting rod (313) is be hinged.
6. low-voltage circuit breaker according to claim 3, it is characterised in that on described housing (1) and corresponding to institute
The position for stating the left side of rotating shaft bar hinged end (3112) is provided with a rotating shaft bar hinged end limit shaft (11).
7. low-voltage circuit breaker according to claim 5, it is characterised in that described handle linkage (31) also includes one
Tiller (312), a main spring (314), a tripping (315), a lock (316) and a draw bar (317), tiller
(312) hub setting includes on one in the operating mechanism support (318) for setting the operating mechanism (3), toggle connecting rod (313)
Connecting rod (3131) and a lower link (3132), the upper end of upper connecting rod (3131) and tripping (315) are be hinged, under upper connecting rod (3131)
End is hinged by one end of rod hinge connection axle (31311) and lower link (3132), passes through rotating shaft in the middle part of the rotating shaft bar (311)
Bar jointed shaft（3114）It is hinged on the operating mechanism support（318）On, the rotating shaft bar hinged end (3112) of rotating shaft bar (311) is logical
The other end for crossing rotating shaft bar hinged end jointed shaft (3113) and lower link (3132) is hinged, and one end of main spring (314) is hung
The top of tiller (312), the other end of main spring (314) are hung on the rod hinge connection axle (31311), tripping
(315) by (3151) hub setting of tripping axle on the operating mechanism support (318) and with latching (316) hasp, lock
(316) hinge is located on operating mechanism support (318) and is located at operation with draw bar (317) hasp, draw bar (317) equally hinge
On mechanism rack (318), one end of the extension spring is positioned on the housing (1) by extension spring fixed column (13), and the other end
It is positioned on the rotating shaft bar hinged end jointed shaft (3113).
8. low-voltage circuit breaker according to claim 1, it is characterised in that described bridge contact system (2) includes contact branch
Seat (27), it is separately positioned on a pair of static contacts (22) of contact support (27) both sides, dynamic touching of being located in contact support (27)
Head (21) and the touch spring (23) being located between the housing (1) and moving contact (21), moving contact (21), which has a pair, to be moved
Contact (211), this is corresponding with the stationary contact (221) on a pair of static contacts (22) to movable contact (211), and touch spring (23) is right
Moving contact (21) provides an active force moved to static contact (22) direction.
9. low-voltage circuit breaker according to claim 3, it is characterised in that described housing (1) includes being used to house the behaviour
Make the upper shell (14) of mechanism (3) and the pedestal (12) for housing the bridge contact system (2), upper shell (14) and pedestal
(12) snap fit, the bottom of upper shell (14) have opening (110), when the rotating shaft bar (311) pivots, the rotating shaft bar
Effect end (3111), which is located in opening (110) and separates or lean out the opening (110) with bridge contact system (2), pushes bridge-type
Contact system (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720557132.3U CN206758380U (en) | 2017-05-18 | 2017-05-18 | Low-voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720557132.3U CN206758380U (en) | 2017-05-18 | 2017-05-18 | Low-voltage circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206758380U true CN206758380U (en) | 2017-12-15 |
Family
ID=60618579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720557132.3U Active CN206758380U (en) | 2017-05-18 | 2017-05-18 | Low-voltage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206758380U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022206919A1 (en) * | 2021-04-01 | 2022-10-06 | 上海正泰智能科技有限公司 | Operating mechanism of circuit breaker, and circuit breaker |
-
2017
- 2017-05-18 CN CN201720557132.3U patent/CN206758380U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022206919A1 (en) * | 2021-04-01 | 2022-10-06 | 上海正泰智能科技有限公司 | Operating mechanism of circuit breaker, and circuit breaker |
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