CN205487987U - Operation mechanism of small breaker - Google Patents
Operation mechanism of small breaker Download PDFInfo
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- CN205487987U CN205487987U CN201620017337.8U CN201620017337U CN205487987U CN 205487987 U CN205487987 U CN 205487987U CN 201620017337 U CN201620017337 U CN 201620017337U CN 205487987 U CN205487987 U CN 205487987U
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Abstract
Operation mechanism of small breaker including handle, transmission linkage, static contact and moving contact, still includes extension spring and dropout lever, transmission linkage's one end and handle rotating joints, and the other end and moving contact cooperation, the one end of extension spring is fixed on the shell, the other end with move contact connection, the moving contact drive jointly by extension spring and transmission linkage, for the closure of moving contact and static contact required contact force and the excess of stroke elasticity of electric contact reliability of giving security, and, the extension spring provide the energy storage elasticity that is used for the mechanism to reset requiredly absolutely for the branch of drive moving contact and static contact, the dropout lever sets up the moving contact on for locking and unblock cooperation between control transmission linkage and the moving contact, the dropout lever makes transmission linkage and moving contact separate so that the operating device automatic trip when the trouble takes place. This mechanism can effectively simplify the structure, reduce manufacturing cost, improve production efficiency and optimize mechanism's performance.
Description
Technical field
This utility model relates to the operating mechanism of miniature circuit breaker, is particularly suitable for the operating mechanism of low-voltage moulded case a/D small circuit breaker, belongs to Low Voltage Electrical Apparatus.
Background technology
It is known that the operating mechanism of miniature circuit breaker is for driving the disjunction/Guan Bi of moving contact and static contact, and by this disjunction/Guan Bi, control the combined floodgate of chopper, separating brake and tripping operation.Quadric chain is the mechanism that the operating mechanism most typically of existing miniature circuit breaker is the most frequently used, including a handle being connected with kinematic link, constitutes a toggle；One moving contact supports device, has one piece of rotor plate being installed in rotation on pivot；And a mechanical chain that can be disconnected by the action of trip(ping) bar (also commonly referred to as locking), bimetal leaf is connected on trip(ping) bar by a pivot link with single-direction transmission.Above-mentioned mechanical chain is that matching is constituted with the lock bolt (also commonly referred to as lever) in the mandrel being rotatably mounted on plate by trip(ping) bar stop catch, connecting rod is directly connected on lock bolt, this assembly a deceleration transmission level, it is possible to make operating mechanism tripping force reduce.One feature of this mechanism is moving contact and contact support is two independent elements, in order to obtain the excess of stroke function of necessity, travel mechanism must also be set between moving contact and contact support, for this, connection between the rotor plate of moving contact and contact support typically uses two ways, one is to stick with glue knot or weld together, shortcoming is complex procedures, and firmness is unreliable, another kind is by button spring, moving contact to be fixed on contact support, not it is fixed in the rotary shaft of operating mechanism, shortcoming is to cause contact turning arm to lengthen, mechanism action slows, it is unfavorable for product opening performance.Moreover, contact support in quadric chain is fixed together generally by a spring and a swivel plate, and contact support can rotate with little scope with swivel plate, the contact pressure ensureing product with this and the excess of stroke, it is seen then that existing by moving contact, by the way of welding or spring are fixed in contact support, jointly to there is problems of number of components many, driving-chain structure is complicated, and assembling and setting is complicated, efficiency of assembling reduces further, thus affects chopper miniaturization and low cost.In addition, the structure of the mechanical chain in the operating mechanism of existing miniature circuit breaker is set up on the driving-chain between lock bolt and trip(ping) bar, and generally use pointed tooth engagement (also commonly referred to as hasp etc.), the defect of the structure of this pointed tooth engagement is, pointed tooth is easy to wear, thus affects reliability and the service life of product.
Along with improving constantly that miniaturization and multi-functional use require, the most urgent to the demand improving new technique of the operating mechanism of miniature circuit breaker, its technological improvement direction may be summarized to be miniaturization, low cost and include reliability, performance optimization including service life, and be while simplifying structure, reducing part with the common technology core of these directional correlations, it is possible to overcome the restriction of the weak environment affecting performance.
Summary of the invention
The problems referred to above being prior art and existing to be solved in the utility model, aim to provide the operating mechanism of a kind of miniature circuit breaker, while simplifying structure, reducing amount of parts, can further improve the reliability of circuit breaker operation mechanism, the convenience of assembling and setting and production efficiency.
For achieving the above object, this utility model adopts the technical scheme that
A kind of operating mechanism of miniature circuit breaker, including the handle 2 being pivoted on shell 1, kinematic link 3 and the static contact 10 being arranged in shell 1 and moving contact 4, also include extension spring 13 and dropout lever 5, one end of described kinematic link 3 and handle 2 hinge-coupled, the other end coordinates with moving contact 4, one end of described extension spring 13 is fixed on shell 1, and the other end is connected with moving contact 4；Described moving contact 4 is driven jointly by described extension spring 13 and kinematic link 3, Guan Bi for moving contact 4 with static contact 10 provides the contact pressure needed for guarantee electrical contact reliability and excess of stroke elastic force, further, described extension spring 13 provides the energy storage elastic force needed for reset for driving moving contact 4 with the disjunction of static contact 10；Dropout lever 5 is arranged on described moving contact 4, coordinates for controlling locking between kinematic link 3 with moving contact 4 and unlocking, and described dropout lever 5 makes described kinematic link 3 separate so that operating mechanism is threaded off automatically with moving contact 4 when fault occurs.
Preferably, being provided with mechanism's rotating shaft 6 and limit shaft 7 in described shell 1, described moving contact 4 is pivoted in the mechanism's rotating shaft 6 in shell 1, and described moving contact 4 is fixed on mechanism's rotating shaft 6 and the limit shaft 7 of shell 1 by extension spring 13.
Preferably, described moving contact 4 is rotatably installed in mechanism's rotating shaft 6 by the arc-shaped slot 41 of strip thereon, and the installation between the arc-shaped slot 41 of described moving contact 4 with mechanism rotating shaft 6 coordinates and is included in moving contact 4 and has excess of stroke gap h under the state of static contact 10 Guan Bi.
Preferably, described moving contact 4 being provided with arc-shaped slot 41, driving groove 42, pivot hole 43, stopper slot 44, carbine 45 and movable contact 40, described arc-shaped slot 41 is installed with the mechanism's rotating shaft 6 on shell 1 and is coordinated；Described stopper slot 44 contacts cooperation with the limit shaft 7 on shell 1；The described driving groove 42 on moving contact 4 coordinates with driving end 32 transmission of described kinematic link 3, and the described pivot hole 43 on moving contact 4 is installed with the pivot 52 on described dropout lever 5 and coupled.
Preferably, arc-shaped slot 41 and pivot hole 43 it is provided with on described moving contact 4, one end is provided with the driving groove 42 of spill, the other end is provided with movable contact 40, carbine 45 and stopper slot 44 lay respectively at the both sides of moving contact 4, between carbine 45 position arc-shaped slot 41 and driving groove 42, stopper slot 44 is between arc-shaped slot 41 and moving contact 4, pivot hole 43 is between stopper slot 44 and arc-shaped slot 41, arc-shaped slot 41 is positioned on moving contact 4 near carbine 45 side, and pivot hole 43 is positioned on moving contact 4 near stopper slot 44 side.
Preferably, one end of described moving contact 4 is provided with the driving groove 42 that driving end 32 transmission with kinematic link 3 coordinates, described dropout lever 5 is pivoted on moving contact 4, and dropout lever 5 is provided with dropout driving section 53 and the lock face 51 coordinated for the lock fit realizing between kinematic link 3 with moving contact 4 and unblock.
Preferably, described lock fit is to make the lock face 51 on dropout lever 5 abut with the driving end 32 of kinematic link 3, and being locked in the driving groove 42 on moving contact 4 by described driving end 32, the driving end 32 of kinematic link 3 and the lock face 51 of dropout lever 5 produce the latching force jointly acting on driving groove 42；The described cooperation that unlocks is to make the lock face 51 on dropout lever 5 separate with the driving end 32 of kinematic link 3, and makes described driving end 32 can slide in the driving groove 42 on moving contact 4.
Preferably, described dropout lever 5 is additionally provided with the resetting means driving dropout lever 5 to rotate around its pivot 52, the lock face 51 rotated on drive dropout lever 5 that resets of dropout lever 5 abuts with the driving end 32 of kinematic link 3, described driving end 32 is locked in the driving groove 42 on moving contact 4 by this abutting, with the lock fit between kinematic link 3 and the moving contact 4 described in realization.
Preferably, the described dropout driving section 53 on dropout lever 5 is rotated around its pivot 52 by the driving of the trip gear of miniature circuit breaker, the lock face 51 driving dropout lever 5 separates with the driving end 32 of kinematic link 3, this separation makes described driving end 32 can slide in the driving groove 42 on moving contact 4, coordinates with the unblock between kinematic link 3 and the moving contact 4 described in realization.
Preferably, the extended line of the line between the two ends 31,32 of described kinematic link 3 is the lower section of the stable center of rotation 0 at handle 2 under moving contact 4 with static contact 10 closure state；Extended line between the two ends 31,32 of described kinematic link 3 is stable above the center of rotation 0 of handle 2 under moving contact 4 with static contact 10 disjunction state；Extended line between the two ends 31,32 of described kinematic link 3 is transferred to above center of rotation 0 from the lower section of the center of rotation 0 of handle 2 during tripping operation.
Preferably, when moving contact 4 closes with static contact 10, active force on moving contact 4 includes that the pulling force of extension spring 13, static contact 10 act on the latching force that the lock face 51 of the contact pressure of movable contact 40 of moving contact 4, the driving end 32 of kinematic link 3 and dropout lever 5 acts on the driving groove 42 of moving contact 4 jointly, and described contact pressure and the tension balanced with extension spring 13 of making a concerted effort of latching force；When moving contact 4 is with static contact 10 disjunction, active force on moving contact 4 includes that the mechanism's rotating shaft 6 on the pulling force of extension spring 13, shell 1 acts on the contact force that the limit shaft 7 on the restraining forces of arc-shaped slot 41, shell 1 acts on the stopper slot 44 of moving contact 4, and make a concerted effort and the mechanism rotating shaft 6 of the pulling force of described contact force and extension spring 13 act on the restraining forces balance of arc-shaped slot 41.
The operating mechanism of miniature circuit breaker of the present utility model, by using three-link mechanism to realize Guan Bi/disjunction transformational structure, eliminates between moving contact is supported with contact and welds or spring Joining Technology, reduce amount of parts, effectively simplify structure, reduce manufacturing cost.And, by using three-link mechanism and new power architecture, latch-up structure, excess of stroke structure, the optimizing design scheme of Guan Bi/disjunction transformational structure, operating mechanism is provided that required excess of stroke function in the same old way, and can also effectively simplify structure, reduce manufacturing cost, raising production efficiency and optimize mechanism performance.
Accompanying drawing explanation
Advantage of the present utility model and feature can be seen more clearly from, wherein from the description of accompanying drawing illustrated embodiment:
Fig. 1 is the integrally-built floor map that moving contact 4 is in the operating mechanism of the miniature circuit breaker of the present utility model of stable disjunction state with static contact 10.
Fig. 2 is the integrally-built floor map of the operating mechanism of the miniature circuit breaker of the present utility model of the moving contact 4 momentary status during disjunction state operates to closure state.
Fig. 3 is the integrally-built floor map that moving contact 4 is in the operating mechanism of the miniature circuit breaker of the present utility model of stable closure state with static contact 10.
Fig. 4 is the schematic perspective view of the moving contact 4 in the operating mechanism shown in Fig. 1.
Detailed description of the invention
The embodiment be given below in conjunction with accompanying drawing 1 to 4, further illustrates the detailed description of the invention of the operating mechanism of miniature circuit breaker of the present utility model.
In the embodiment shown in Fig. 1-3, the operating mechanism of miniature circuit breaker of the present utility model includes shell 1, static contact 10 (showing schematically stationary contact in figure), the handle 2 being pivoted on shell 1 and the kinematic link 3 of handle 2 hinge-coupled.Operating mechanism of the present utility model also includes extension spring 13, the moving contact 4 jointly driven by kinematic link 3 and extension spring 13, and for controlling to lock and unlock the dropout lever 5 coordinated between kinematic link 3 with moving contact 4.One end 31 and handle 2 hinge-coupled of kinematic link 3, the driving end 32 of the other end coordinates with moving contact 4；One end of described extension spring 13 is fixed on shell 1, the other end is connected with described moving contact 4, described moving contact 4 is made jointly to be driven by described extension spring 13 and kinematic link 3, Guan Bi for moving contact 4 with static contact 10 provides the contact pressure needed for guarantee electrical contact reliability and excess of stroke elastic force, further, described extension spring 13 provides the energy storage elastic force needed for reset for driving moving contact 4 with the disjunction of static contact 10；Described dropout lever 5 is arranged on described moving contact 4, coordinate for controlling locking between kinematic link 3 with moving contact 4 and unlocking, described dropout lever makes described kinematic link 3 separate with moving contact 4 when fault occurs, so that described operating mechanism is threaded off automatically, and unrelated with operation handle 2.
As in the embodiment disclosed in figs. 1-3, three axles being attached separately in described shell 1 it are provided with on the shell 1 of chopper, they are namely for the fixing described axle of extension spring 13 one end, mechanism's rotating shaft 6 and limit shaft 7, described moving contact 4 is pivoted in the mechanism's rotating shaft 6 in shell 1, described moving contact 4 is fixed on mechanism's rotating shaft 6 and the limit shaft 7 of shell 1 by extension spring 13, extension spring 13 and limit shaft 7 lay respectively at the both sides of moving contact 4, and limit shaft 7 limits the slewing area of moving contact 4.
As shown in Figure 4, moving contact 4 of the present utility model being provided with arc-shaped slot 41, driving groove 42, pivot hole 43, stopper slot 44, carbine 45 and movable contact 40, described arc-shaped slot 41 is installed with the mechanism's rotating shaft 6 on described shell 1 and is coordinated；Described stopper slot 44 contacts cooperation with the limit shaft 7 on described shell 1；The described driving groove 42 on moving contact 4 coordinates with driving end 32 transmission of described kinematic link 3, and the described pivot hole 43 on moving contact 4 is installed with the pivot 52 on described dropout lever 5 and coupled.One end of described extension spring 13 couples with shell 1, the other end of extension spring 13 couples with the carbine 45 on moving contact 4, makes moving contact 4 be fixed on rotary shaft 6 and the limit shaft 7 of shell 1 by extension spring 13, and, extension spring 13 provides the contact pressure needed for dynamic and static contact, reaches the reliability of electrical contact.Kinematic link 3 can slide in the driving groove 42 of the spill of moving contact 4 and promote moving contact 4 to rotate, described moving contact can rotate around the rotating shaft 6 of described mechanism and reach dynamic/static contact contact position, change due to the stress point of moving contact 4 when operating mechanism is detained again, make moving contact 4 separate with mechanism rotating shaft 6.A particular preferred embodiment of the present utility model as shown in Figure 4, arc-shaped slot 41 and pivot hole 43 it is provided with on described moving contact 4, one end is provided with the driving groove 42 of spill, the other end is provided with movable contact 40, carbine 45 and stopper slot 44 lay respectively at the both sides of moving contact 4, between carbine 45 position arc-shaped slot 41 and driving groove 42, stopper slot 44 is between arc-shaped slot 41 and moving contact 4, pivot hole 43 is between stopper slot 44 and arc-shaped slot 41, arc-shaped slot 41 is positioned on moving contact 4 near carbine 45 side, pivot hole 43 is positioned on moving contact 4 near stopper slot 44 side.
As can be seen here, one beneficial features of the operating mechanism of miniature circuit breaker of the present utility model is to include three organization plans being different from prior art simultaneously: scheme one is to have employed the three-link mechanism being made up of kinematic link 3, moving contact 4 and dropout lever 5, eliminates traditional latch lever；Scheme two is the structure that have employed a moving contact 4, eliminates the flap of traditional contact support and is arranged on the travel mechanism between contact support and moving contact or coupling mechanism；Scheme three is to have employed one can provide energy storage elastic force, contact pressure and the spring structure of excess of stroke elastic force simultaneously, it may be assumed that still ensures that the extension spring 13 of the function of complete elastic energy accumulation, Elastic Contact and the elastic excess of stroke, eliminates traditional excess of stroke spring.Essence of the present utility model is not only whole structural scheme and the operation principle changing operating mechanism, and certainly will also change the concrete structure scheme of operating mechanism, the power architecture of such as mechanism, latch-up structure, excess of stroke structure, Guan Bi/disjunction transformational structure etc..The feature that obvious this design has simple in construction, number of components is few, thus can effectively reduce manufacturing cost, improve production efficiency, the performance of mechanism can also be made to be optimized simultaneously.
Power architecture of the present utility model relates generally to elastic force and drives structure and the force system in equilibrium structure of core component.Elastic force drives structure can have multiple specific implementation, the one that this utility model uses is preferably: extension spring 13 is not only and drives the disjunction of moving contact 4 and static contact 10 to provide energy storage elastic force, and extension spring 13 also Guan Bi for moving contact 4 with static contact 10 provides contact pressure and excess of stroke elastic force.In existing quadric chain, elastic force drives structure must use energy-stored spring and excess of stroke spring, two each have their own functions of spring, wherein energy-stored spring is for driving moving contact to provide energy storage elastic force (i.e. elastic energy accumulation) with the disjunction of static contact, and the contact pressure (i.e. Elastic Contact) that excess of stroke spring provides with the Guan Bi of static contact for moving contact and excess of stroke elastic force (the i.e. elastic excess of stroke), lack a spring and lack a function the most therewith.This utility model uses an extension spring 13, can be achieved with described elastic energy accumulation, Elastic Contact and elastic three elastic force of the excess of stroke and drives function.Force system in equilibrium structure of the present utility model can have multiple specific implementation, and a kind of preferably mode that this utility model uses includes following two situation.The first situation is: when moving contact 4 closes with static contact 10 (as shown in Figure 3), active force on moving contact 4 includes that extension spring 13 acts on the pulling force of the carbine 45 on moving contact 4, static contact 10 acts on the contact pressure of movable contact 40, the driving end 32 of kinematic link 3 and the lock face 51 of dropout lever 5 act on the latching force of driving groove 42 jointly, and (i.e. transmission between driving end 32 and the driving groove 42 on moving contact 4 of kinematic link 3 coordinates the state being in transmission power, the driving force of interaction must be there is) between driving end 32 and driving groove 42, and, described contact pressure and the tension balanced with extension spring 13 of making a concerted effort of latching force.In the case of as shown in Figure 3 the first: the arc-shaped slot 41 on moving contact 4 is not provided restraining forces, i.e. installation between mechanism's rotating shaft 6 with arc-shaped slot 41 to coordinate and is in released state by the mechanism's rotating shaft 6 on shell 1；Stopper slot 44 on moving contact 4 is not provided contact force, the i.e. cooperation that contacts between stopper slot 44 and the limit shaft 7 on shell 1 to be in released state by the limit shaft 7 on shell 1.The second situation is: when moving contact 4 is with static contact 10 disjunction (as shown in Figure 1), active force on moving contact 4 includes that the limit shaft 7 on the restraining forces of arc-shaped slot 41 that the mechanism's rotating shaft 6 on the pulling force of carbine 45 that extension spring 13 acts on moving contact 4, shell 1 acts on moving contact 4, shell 1 acts on the contact force of the stopper slot 44 on moving contact 4, and the restraining forces with arc-shaped slot 41 of making a concerted effort of the pulling force of described contact force and extension spring 13 balances.In the case of the second as shown in Figure 1, transmission between driving end 32 and the driving groove 42 on moving contact 4 of kinematic link 3 coordinates and is in the state not transmitting power, although the lock face 51 of dropout lever 5 is in the lock state, but between the driving groove 42 on the driving end 32 of kinematic link 3 and moving contact 4, need not the driving force that (not existing) interact.When moving contact 4 closes with static contact 10, active force on moving contact 4 includes that extension spring 13 acts on the pulling force of carbine 45, static contact 10 acts on the contact pressure of movable contact 40, the lock face 51 of the driving end 32 of kinematic link 3 and dropout lever 5 acts on the latching force of driving groove 42 jointly, and described contact pressure and the tension balanced with extension spring 13 of making a concerted effort of latching force.And when moving contact 4 is with static contact 10 disjunction, active force on moving contact 4 includes that extension spring 13 acts on the mechanism's rotating shaft 6 on the pulling force of carbine 45, shell 1 and acts on the limit shaft 7 on arc-shaped slot 41 restraining forces, shell 1 and act on the contact force of stopper slot 44, and the restraining forces with arc-shaped slot 41 of making a concerted effort of the pulling force of described contact force and extension spring 13 balances.It should be appreciated that arrive; force system in equilibrium structure is for the operating mechanism of miniature circuit breaker; it is to ensure that the operating characteristics of mechanism and the key of performance; power architecture of the present utility model is fairly simple and reasonable; the interference between loss and the power of unnecessary power can be avoided, with guarantee the reliable and stable of dynamic balance and operating mechanism action rapidly and sensitive.
Described latch-up structure can have multiple specific implementation, this utility model use one preferably: be provided with lock face 51, pivot 52 and dropout driving section 53 on described dropout lever 5, lock face 51 locks with the driving end 32 of kinematic link 3 and unlocks and coordinates, and pivot 52 is installed with the pivot hole 43 on moving contact 4 and coupled.Locking between described kinematic link 3 and moving contact 4 and unlock to coordinate and include lock fit and unlock cooperation, one end of described moving contact 4 is provided with the driving groove 42 that driving end 32 transmission with kinematic link 3 coordinates, described dropout lever 5 is pivoted on moving contact 4, and dropout lever 5 is provided with dropout driving section 53 and the lock face 51 coordinated for the lock fit realizing between kinematic link 3 with moving contact 4 and unblock.Wherein, described lock fit causes the lock face 51 on dropout lever 5 to abut with the driving end 32 of kinematic link 3, and being locked in the driving groove 42 of moving contact 4 by the driving end 32 of described kinematic link 3, the driving end 32 of kinematic link 3 and the lock face 51 of dropout lever 5 produce the latching force jointly acting on driving groove 42；The described cooperation that unlocks causes lock face 51 to separate with the driving end 32 of kinematic link 3, and makes the driving end 32 of described kinematic link 3 can slide in driving groove 42.Obviously, the advantage of this frame mode is, lock fit and unblock coordinate coordinating between lock face 51 and the driving end 32 (rod-like structure) of kinematic link 3 being built upon on dropout lever 5, compared with this cooperation is engaged with traditional pointed tooth, there is obvious anti abrasive advantage, but also it is provided that bigger latching force, can effectively promote the reliability of locking.As Figure 1-3, one particular preferred embodiment of dropout lever 5 of the present utility model, described dropout lever 5 includes lock arm and the transmission arm connected, lock arm end is provided with lock face 51, transmission arm is provided with dropout driving section 53, forms V-groove, be provided with the pivot 52 being rotatably assorted with moving contact 4 on lock arm between lock arm and transmission arm, dropout lever 5 is installed in the pivot hole 43 of moving contact 4 by pivot 52, and the V-groove of dropout lever 5 is correspondingly arranged with limit shaft 7.
The concrete latch-up structure matched with above-mentioned locking and unblock fit structure can have multiple specific implementation, and a kind of preferably mode that this utility model uses includes following two situation.The first situation is: dropout lever 5 is additionally provided with resetting means (not shown), the dropout driving section 53 on dropout lever 5 is driven to rotate around its pivot 52 with it, the rotation that resets of dropout lever 5 drives lock face 51 thereon to abut with the driving end 32 of kinematic link 3, to be locked in the driving groove 42 of moving contact 4 by this driving end 32, i.e. lock face 51 is in lock fit state with the driving end 32 of kinematic link 3.Described resetting means can use back-moving spring (not shown), and its two ends couple with dropout lever 5 and moving contact 4 respectively.Also can use the angular flexibility device (not shown) being arranged on dropout lever 5, the angle end of angular flexibility is set up friction and/or spacing couples with moving contact 4 or shell 1.The second situation is: the trip gear of miniature circuit breaker drives the dropout driving section 53 on dropout lever 5 to rotate around its pivot 52, this rotation drives lock face 51 thereon to separate with the driving end 32 of kinematic link 3, make this driving end 32 can slide in driving groove 42, i.e. lock face 51 is in unblock mated condition with the driving end 32 of kinematic link 3.Under normal circumstances, the trip gear of miniature circuit breaker includes two kinds of electrical apparatus releases, one of which is magnetictrip, when circuit reaches electromagnetic trip condition, the striker 12 being cased with push rod effect spring 11 on its of magnetictrip ejects, impinge upon on the dropout driving section 53 on dropout lever 5, to drive dropout lever 5 to rotate around its pivot 52.Another kind is thermal trip, and when reaching hot dropout condition in circuit, thermoinduction device 9 (such as bimetal leaf device) bending drive rod 8 pull the dropout driving section 53 on dropout lever 5, to drive dropout lever 5 to rotate around its pivot 52.It is emphasized that: described unblock coordinates simply generation trip gear drives dropout lever 5 when, be to occur during the tripping operation of miniature circuit breaker in other words, and coordinate all without occurring to unlock during normal separating brake normal combined floodgate.Under normal "on" position (as shown in Figure 3) and normal gate-dividing state (as shown in Figure 1), and in operating process of normally closing a floodgate (operating the process shown in Fig. 3 as shown in Figure 1) and normal sub-switching operation process (operating the process shown in Fig. 1 as shown in Figure 3), dropout lever 5 is not driven due to trip gear, therefore dropout lever 5 is in lock fit state all the time, especially because the effect of resetting means, as long as trip gear removes the driving to dropout lever 5, what position no matter dropout lever 5 be in, lock fit state will be automatically reset to, close a floodgate and the reliability of normal separating brake so that it is guaranteed that normal.
Described excess of stroke structure can have multiple specific implementation, a kind of preferably mode that this utility model uses is as shown in Figure 3: described moving contact 4 is rotatably installed in mechanism's rotating shaft 6 by the arc-shaped slot 41 of strip thereon, when moving contact 4 closes with static contact 10, there is between mechanism's rotating shaft 6 on the arc-shaped slot 41 of moving contact 4 and shell 1 excess of stroke gap h, by the arc-shaped slot 41 of strip, and non-circular arc-shaped slot 41 realizes excess of stroke gap.Described excess of stroke gap is to be realized by the installation cooperation structure of arc-shaped slot 41 with the mechanism's rotating shaft 6 on shell 1, this installation coordinates, the arc-shaped slot 41 being arranged in mechanism's rotating shaft 6 can be slidably matched with mechanism rotating shaft 6, make to form excess of stroke gap h during operation moving contact 4 closes (disjunction state operation the most as shown in Figure 1 is the closure state shown in Fig. 3) with static contact 10, compensated the excess of stroke of known moving contact by excess of stroke gap h.Concrete overshooting compensation principle is as follows: under the disjunction state shown in Fig. 1, operation handle 2 moves in the direction of the clock, moving contact 5 is promoted to move in the direction of the clock around mechanism's rotating shaft 6 by kinematic link 3, and contact with static contact 10, arrive the momentary status shown in Fig. 2, in this case and before this state, moving contact 5 is with mechanism's rotating shaft 6 as fulcrum, and i.e. the excess of stroke gap h between the mechanism's rotating shaft 6 on arc-shaped slot 41 and shell 1 is 0.When handle 2 is rotated further, the rotating fulcrum decorporation rotating shaft 6 of moving contact 5 also transfers to static contact 10, now moving contact 4 rotates with the contact point with static contact 10 for the center of circle, moving contact 4 separates excess of stroke gap h with the mechanism's rotating shaft 6 on shell 1, until arriving fully closed position as shown in Figure 3 to complete normal closing operation.Certainly, from the closure state shown in Fig. 3, reverse operation handle 2 just can return to the disjunction state shown in Fig. 1, completes normal sub-switching operation, and the position of each action piece is the inversion of aforesaid operations.
Described Guan Bi/disjunction transformational structure can have multiple specific implementation, the one that this utility model uses is preferably: under moving contact 4 with static contact 10 closure state, the lower section (as shown in Figure 3) of the stable center of rotation 0 at handle 2 of the extended line of the line between the two ends 31,32 of kinematic link 3, makes operating mechanism stable in "on" position；Under moving contact 4 with static contact 10 disjunction state, this extended line stable above the center of rotation 0 of handle 2 (as shown in Figure 3), make operating mechanism stable at gate-dividing state；During tripping operation, this extended line transfers to the top of center of rotation 0 from the lower section of the center of rotation 0 of handle 2.nullThus it is conceivable that，During tripping operation，It is caused by the unlocking motion by dropout lever 5 that described extended line transfers to top from below，I.e. when dropout lever 5 rotates around its pivot 52 under the driving of trip gear，Lock face 51 thereon separates with the driving end 32 of kinematic link 3 and can slide in driving groove 42，This slip causes the driving end 32 of kinematic link 3 to move down，This moves and causes this extended line to rotate clockwise around one end 31 of kinematic link 3，Ultimately result in described extended line cross from below flex point (center of rotation 0 of handle 2) transfer to top，And once described extended line crosses flex point，Then the elastic force of extension spring 13 just drives moving contact 4 to rotate to disjunction direction (counterclockwise)，Until moving contact 4 is in the stable disjunction state shown in Fig. 1，Namely complete trip operation.
Above content is to combine concrete preferred implementation further detailed description of the utility model, it is impossible to assert that of the present utility model being embodied as is confined to these explanations.For this utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, it is also possible to make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (10)
1. an operating mechanism for miniature circuit breaker, including the handle (2) being pivoted on shell (1),
Kinematic link (3) and the static contact (10) being arranged in shell (1) and moving contact (4), it is special
Levy and be: also include extension spring (13) and dropout lever (5), one end of described kinematic link (3) with
Handle (2) hinge-coupled, the other end coordinates with moving contact (4), and one end of described extension spring (13) is fixed
On shell (1), the other end is connected with moving contact (4)；Described moving contact (4) is drawn by described
Spring (13) and kinematic link (3) drive jointly, and the Guan Bi for moving contact (4) with static contact (10) carries
For ensureing the contact pressure needed for electrical contact reliability and excess of stroke elastic force, and, described extension spring (13) is
Moving contact (4) is driven to provide the energy storage elastic force needed for reset with the disjunction of static contact (10)；
Dropout lever (5) is arranged on described moving contact (4), is used for controlling kinematic link (3) and touches with dynamic
Locking and unblock between head (4) coordinate, and described dropout lever (5) makes described when fault occurs
Kinematic link (3) separates so that operating mechanism is threaded off automatically with moving contact (4).
The operating mechanism of miniature circuit breaker the most according to claim 1, it is characterised in that: described
Being provided with mechanism's rotating shaft (6) and limit shaft (7) in shell (1), described moving contact (4) is pivotally mounted
In mechanism's rotating shaft (6) in shell (1), described moving contact (4) is fixed on by extension spring (13)
In mechanism's rotating shaft (6) of shell (1) and limit shaft (7).
The operating mechanism of miniature circuit breaker the most according to claim 2, it is characterised in that: described
Moving contact (4) is rotatably installed in mechanism's rotating shaft (6) by the arc-shaped slot (41) of strip thereon,
Installation between the arc-shaped slot (41) of described moving contact (4) and mechanism's rotating shaft (6) coordinates and is included in
Under the state that moving contact (4) and static contact (10) close, there is excess of stroke gap h.
The operating mechanism of miniature circuit breaker the most according to claim 2, it is characterised in that: described
Arc-shaped slot (41), driving groove (42), pivot hole (43), stopper slot it is provided with on moving contact (4)
(44), carbine (45) and movable contact (40), described arc-shaped slot (41) and shell (1)
On mechanism's rotating shaft (6) install coordinate；Described stopper slot (44) and the limit shaft (7) on shell (1)
Contact coordinates；The described driving groove (42) on moving contact (4) and the biography of described kinematic link (3)
Moved end (32) transmission coordinates, the described pivot hole (43) on moving contact (4) and described dropout lever
(5) pivot (52) on is installed and is coupled.
The operating mechanism of miniature circuit breaker the most according to claim 4, it is characterised in that: described
Being provided with arc-shaped slot (41) and pivot hole (43) on moving contact (4), one end is provided with the driving groove of spill
(42), the other end is provided with movable contact (40), carbine (45) and stopper slot (44) and lays respectively at dynamic
The both sides of contact (4), between carbine (45) position arc-shaped slot (41) and driving groove (42),
Stopper slot (44) is positioned between arc-shaped slot (41) and moving contact (4), and pivot hole (43) is positioned at spacing
Between groove (44) and arc-shaped slot (41), it is upper near bullet that arc-shaped slot (41) is positioned at moving contact (4)
Spring hook (45) side, it is upper near stopper slot (44) side that pivot hole (43) is positioned at moving contact (4).
The operating mechanism of miniature circuit breaker the most according to claim 1, it is characterised in that: described
One end of moving contact (4) is provided with the driving groove (42) that driving end (32) transmission with kinematic link (3) coordinates,
Described dropout lever (5) is pivoted on moving contact (4), and dropout lever is provided with dropout on (5)
Driving section (53) and be used for realizing the lock fit between kinematic link (3) and moving contact (4) and unblock
The lock face (51) coordinated.
The operating mechanism of miniature circuit breaker the most according to claim 6, it is characterised in that: described
Lock fit is the driving end (32) making the lock face (51) on dropout lever (5) with kinematic link (3)
Abut, and described driving end (32) be locked in the driving groove (42) on moving contact (4) Nei,
The driving end (32) of kinematic link (3) and the lock face (51) of dropout lever (5) produce common effect
Latching force in driving groove (42)；It is to make the lock face (51) on dropout lever (5) that described unblock coordinates
Separate with the driving end (32) of kinematic link (3), and make the described driving end (32) can be at moving contact
(4) slide in the driving groove (42) on.
The operating mechanism of miniature circuit breaker the most according to claim 1, it is characterised in that: described
Dropout lever (5) is additionally provided with the resetting means driving dropout lever (5) to rotate around its pivot (52),
The reset of dropout lever (5) rotates and drives the lock face (51) on dropout lever (5) and kinematic link (3)
Driving end (32) abut, described driving end (32) is locked on moving contact (4) by this abutting
In driving groove (42), with the lock fit between kinematic link (3) and the moving contact (4) described in realization；
The described dropout driving section (53) on dropout lever (5) is by the driving of trip gear of miniature circuit breaker
Rotate around its pivot (52), drive lock face (51) and the kinematic link (3) of dropout lever (5)
Driving end (32) separates, and this separation makes the described driving end (32) can transmission on moving contact (4)
Slide in groove (42), coordinate with the unblock between kinematic link (3) and the moving contact (4) described in realization.
The operating mechanism of miniature circuit breaker the most according to claim 1, it is characterised in that: described
The extended line of the line between the two ends (31,32) of kinematic link (3) is at moving contact (4) and static contact
(10) lower section of the stable center of rotation 0 at handle (2) under closure state；Described kinematic link (3)
Two ends (31,32) between extended line steady under moving contact (4) and static contact (10) disjunction state
It is scheduled on the top of the center of rotation 0 of handle (2)；The two ends (31,32) of described kinematic link (3)
Between extended line tripping operation during transfer to center of rotation 0 from the lower section of the center of rotation 0 of handle (2)
Top.
The operating mechanism of miniature circuit breaker the most according to claim 3, it is characterised in that: touch dynamic
Under the state that head (4) and static contact (10) close, the active force on moving contact (4) includes extension spring (13)
Pulling force, static contact (10) act on the contact pressure of movable contact (40) of moving contact (4), transmission
The driving end (32) of connecting rod (3) and the lock face (51) of dropout lever (5) act on moving contact jointly
(4) latching force of driving groove (42), and the making a concerted effort and extension spring of described contact pressure and latching force
(13) tension balanced；When moving contact (4) is with static contact (10) disjunction, moving contact (4)
On active force include that the mechanism's rotating shaft (6) on the pulling force of extension spring (13), shell (1) acts on arc
Limit shaft (7) on the restraining forces of slotted eye (41), shell (1) acts on the spacing of moving contact (4)
The contact force of groove (44), making a concerted effort and mechanism's rotating shaft (6) of the pulling force of described contact force and extension spring (13)
Act on the restraining forces balance of arc-shaped slot (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620017337.8U CN205487987U (en) | 2016-01-11 | 2016-01-11 | Operation mechanism of small breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620017337.8U CN205487987U (en) | 2016-01-11 | 2016-01-11 | Operation mechanism of small breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205487987U true CN205487987U (en) | 2016-08-17 |
Family
ID=56664420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620017337.8U Withdrawn - After Issue CN205487987U (en) | 2016-01-11 | 2016-01-11 | Operation mechanism of small breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205487987U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106960768A (en) * | 2016-01-11 | 2017-07-18 | 浙江正泰电器股份有限公司 | The operating mechanism of miniature circuit breaker |
| CN108538686A (en) * | 2017-03-06 | 2018-09-14 | 上海良信电器股份有限公司 | A kind of circuit breaker trip unit |
-
2016
- 2016-01-11 CN CN201620017337.8U patent/CN205487987U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106960768A (en) * | 2016-01-11 | 2017-07-18 | 浙江正泰电器股份有限公司 | The operating mechanism of miniature circuit breaker |
| WO2017121164A1 (en) * | 2016-01-11 | 2017-07-20 | 浙江正泰电器股份有限公司 | Operation mechanism for miniature circuit breaker |
| CN106960768B (en) * | 2016-01-11 | 2019-10-11 | 浙江正泰电器股份有限公司 | The operating mechanism of miniature circuit breaker |
| EP3404691B1 (en) * | 2016-01-11 | 2021-01-27 | Zhejiang Chint Electrics Co., Ltd. | Operation mechanism for miniature circuit breaker |
| CN108538686A (en) * | 2017-03-06 | 2018-09-14 | 上海良信电器股份有限公司 | A kind of circuit breaker trip unit |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160817 Effective date of abandoning: 20191011 |
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| AV01 | Patent right actively abandoned |