CN203288441U - Switching device having contact opening distance capable of being amplified according to requirements - Google Patents
Switching device having contact opening distance capable of being amplified according to requirements Download PDFInfo
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- CN203288441U CN203288441U CN2013201749009U CN201320174900U CN203288441U CN 203288441 U CN203288441 U CN 203288441U CN 2013201749009 U CN2013201749009 U CN 2013201749009U CN 201320174900 U CN201320174900 U CN 201320174900U CN 203288441 U CN203288441 U CN 203288441U
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Abstract
The utility model discloses a switching device having a contact opening distance capable of being amplified according to requirements. The switch device comprises a supporting member disposed in a housing, a contact reset spring and an actuator. Two ends of the contact reset spring are connected with the housing and the supporting member. Two dynamic contacts can move along with the supporting members along a contact central line C-C linearly. A motion switching device comprises a motion switching member and a force reducing spring. The motion switching member is rotatably and pivotedly disposed on the housing by a revolute pair, and two ends of the force reducing spring are connected with the motion switching member and the housing. The motion switching member is provided with at least an input motion acting part, which is in a contact cooperation with an actuating member, and at least one motion output acting part, which is in a contact cooperation with the supporting member. A moment arm distance alfa between the input motion acting part and a rotating center of the revolute pair is smaller than the moment arm distance beta between the motion output acting part and the rotating center of the revolute pair. A direction of elastic force Q of the contact reset spring is the same as the direction of the breaking motion of the supporting member, and therefore the moment m of the elastic force Q, which can be acted on the motion switching member by the supporting member, is smaller than the moment M of the elastic force of the force reducing spring, which can be acted on the motion switching member, and the directions are opposite to each other.
Description
Technical field
The utility model belongs to the switching device that a kind of switching device that the electric switch technical field relates to, particularly a kind of clearance between open contacts can amplify as required, can be widely used in stroke little but require to open various occasions apart from large.
Background technology
But contactor is a kind of switching device of connection/disjunction of control circuit, but the difference of the switching device of it and other kind is, it not only has the connection that all switching devices all have/switching function of minute deenergizing and operating function of manual control circuit connection/disjunction, and be the switch control apparatus of the connection/disjunction of automatic control circuit, have that action is fast, the control capacity is large, safe and convenient to use, can frequent operation and the advantage such as remote operation.As everyone knows, the switching function of contactor is realized by its contact system, the control function of contactor is realized by its electromagnetic mechanism, electromagnetic mechanism is made between iron core and static iron core by the control of manual operation or control circuit and produces adhesive/release movement, and this adhesive/release movement drives moving contact and fixed contact is done closure/disjunction action.in order to obtain better breaking capacity and larger control capacity, at present, contactor on market adopts the direct drive mode that is directly driven the moving contact traveling priority by electromagnetic mechanism mostly, the moving contact of contact system adopts the version of double-contact movable contact bridge usually, there is following defect in this direct-acting contactor: first, because the stroke of designing requirement moving contact traveling priority is very large, must keep enough large distances of opening between the moving contact of direct-acting contactor and fixed contact, the stroke ratio that is determined by direct drive mode can only be 1:1, so the stroke of the moving iron core of electromagnetic mechanism is also very large, thereby cause the energy consumption of dual coil electromagnetic mechanism in on-state large, and complex structure, be difficult for changing, cost is high.The second, electromagnetic mechanism is large for the actuating force that moving iron core provides, and large impact power not only causes contact system excessive at vibrations and the noise of connection/breaking course, is also to cause all very large another reasons of electromagnetic mechanism volume and energy consumption.The 3rd, because the direction of motion of the moving iron core of electromagnetic mechanism is consistent with the moving direction of the moving contact of contact system, so that the length proportional imbalance of contactor product is unfavorable for the miniaturization of product.The 4th, direct drive mode is difficult to get involved polynary control, can not meet modern switching device to the multi-functional needs that for example have the contactor technical development of circuit breaker function.
Chinese utility model patent 201120352337.0 discloses a kind of switching device with lever ratio, by changing the fixed form of rocking arm, the ratio of the Partner that adopts the rocking arm part and utilize rocking arm to the drive end of the distance of spindle central and rocking arm to the lever ratio (being stroke ratio) of the distance of spindle central solved greater than 1 scheme the problem that traditional stroke ratio is 1:1.but according to this patent, lever ratio has also been amplified the electromagnetic actuation force of electromagnetic mechanism greater than 1 the time, for example, be 5 by its lever ratio that provides, the architectural feature of the contact system of " the movable contact bridge is to be with moving contact support and rocking arm to reset under the effect of its elastic force to make the movable contact bridge break away from fixed contact by back-moving spring with the disconnection of fixed contact " is calculated, the electromagnetic actuation force of its electromagnetic mechanism must be greater than the elastic force (the disjunction power of contact) of back-moving spring and 5 times of contact power stack sum, than existing same structure but do not adopt the electromagnetic actuation force of switching device of rocking arm large 5 times.Owing to can not reducing electromagnetic mechanism about driving contact system institute work, thereby, this patent is objectively to solving the not contribution of " volume of electromagnetic mechanism is large, energy consumption is large; correspondingly have power loss and thermal radiation " problem, on the contrary, the increase of the electromagnetic actuation force of electromagnetic mechanism (particularly in the situation that increase by 500) can cause the mechanical performance of electromagnetic mechanism and contact system descend and/or increase manufacture difficulty.And, because the pressure that the rocking arm drive end is pressed can only be from the electromagnetic mechanism that is positioned at the drive end top, so the rocking arm drive end is pressed, drive end is moved from the top down, this motion can only drive Partner and the contact support is moved from bottom to top, thereby, if this patent will realize " when the rocking arm drive end was pressed, its Partner band moving contact support moved downward ", must set up the steering mechanism of actuating force, and the steering mechanism of additional drives power must cause structure more complicated.In addition, movable contact bridge and fixed contact are closed while contacting, because the rocking arm drive end is pressed (be electromagnetic mechanism to rocking arm drive end exert pressure action), as long as do not remove the exert pressure action of electromagnetic mechanism to the rocking arm drive end, movable contact bridge and fixed contact can not disjunctions, thus no matter increase what drive ends or Partner on rocking arm, the structural limitations of this patent its except electromagnetic mechanism except a kind of control inputs, can not get involved other control inputs, make it realize polynary control by rocking arm.In addition, the connecting portion that is connected with contact support contact due to the Partner of rocking arm departs from the symmetrical centre of movable contact bridge, the elastic force position of back-moving spring also departs from the symmetrical centre of movable contact bridge, this structure can cause the decline of contact performance of exercise performance, moving contact and the fixed contact of movable contact bridge, reduces life of product.
The utility model content
The switching device that provides a kind of clearance between open contacts to amplify as required is provided the purpose of this utility model, for making the energy consumption of dual coil electromagnetic system and device in on-state that the minimum good design solution that provides is provided, can slow down impact, gain in strength, action-changing device simple in structure, improved life of product, and, because the moving direction of the moving contact of the direction of motion of the moving iron core of electromagnetic mechanism and contact system is perpendicular, be beneficial to contactor and get involved the polynary control of switching device.
For achieving the above object, the utility model provides following technical scheme:
the switching device that a kind of clearance between open contacts can amplify as required, comprise the first fixed contact 61 and the second fixed contact 62 that are separately fixed in the body 2, be arranged on the strutting piece 3 of the energy traveling priority in the body 2, be arranged on movable contact bridge 4 on strutting piece 3 by mounting structure, be separately fixed at the first moving contact 81 and the second moving contact 82 that mutually are electrically connected on movable contact bridge 4, contact back-moving spring 5 and at least one actuator 9, the two ends of described contact back-moving spring 5 respectively with the body 2, strutting piece 3 connects, the first moving contact 81 and the second moving contact 82 can be with strutting pieces 3 and along contact center line C-C traveling priority, make the first moving contact 81, the second moving contact 82 respectively with the first fixed contact 61, the second fixed contact 62 is disjunction/closure simultaneously.Described switching device also has an action-changing device, this action-changing device comprises action bridgeware 1 and subtracts power spring 7, described action bridgeware 1 is pivotally mounted on the body 2 by revolute pair 8, and the two ends of the described power of subtracting spring 7 are connected with action bridgeware 1, the body 2 respectively; Described action bridgeware 1 is provided with at least one input action service portion 11 and at least one action output action section 12, and the arm of force between the center of rotation of described input action service portion 11 and revolute pair 8 apart from a less than the arm of force distance b between the center of rotation of described action output action section 12 and revolute pair 8, described input action service portion 11 contacts with the actuated piece of described actuator 9 and coordinates and transmit power and action, and described action output action section 12 contacts with described strutting piece 3 and coordinates and transmit power and action.The direction of the elastic force Q of described contact back-moving spring 5 is consistent with the disjunction direction of motion of strutting piece 3, make elastic force Q act on the moment m of action on bridgeware 1 by strutting piece 3 and act on moment M on action bridgeware 1 and moment M and moment m opposite direction less than the elastic force that subtracts power spring 7.
Further, the input action service portion 11 on described action bridgeware 1 comprises and stretches out the outer outer service portion 11w of the body 2, and it is vertical with contact center line C-C that the actuated piece of actuator 9 acts on the direction of the actuating force Pw on described outer service portion 11w.
Further, input action service portion 11 on described action bridgeware 1 comprises the first horizontal service portion 11x and the second horizontal service portion 11n/ or the vertical service portion 11y that is positioned at the body 2, the actuated piece of actuator act on first laterally in service portion 11x, second laterally in the direction of actuating force Pnx on service portion 11n parallel with contact center line C-C, it is vertical with contact center line C-C that the actuated piece of actuator acts on the direction of the actuating force Pny on vertically interior service portion 11y.
Further, the elastic force Q of described contact back-moving spring 5 acts on strutting piece 3 along contact center line C-C, and strutting piece 3 is upper at contact center line C-C and action efferent 12 described action bridgeware 1 contacts cooperation.
Further, described revolute pair 8 is for being formed on the pivot and the axis hole that is formed on the body 2 on action bridgeware 1, and action bridgeware 1 inserts formation pivotable in axis hole by pivot and installs; Perhaps described revolute pair 8 is for being formed on the protruding axle and the pivot hole that is formed on action bridgeware 1 on the body 2, and action bridgeware 1 is contained in formation pivotable on protruding axle by the pivot borehole jack and installs.
Further, described arm of force distance b and the described arm of force are 1＜b:a＜5 apart from the preferable range of the ratio of a.
Further, contacting the form that coordinates between described action output action section 12 and strutting piece 3 is cambered surface and plane or cambered surface and cambered surface.
Further, contacting the form that coordinates between the actuated piece of described input action service portion 11 and action actuation device 9 is cambered surface and plane or cambered surface and cambered surface.
Further, described mounting structure is the elastic floating syndeton with excess of stroke spring; Perhaps described mounting structure is the flexible fastening syndeton that movable contact bridge 4 has micro-elastic distortion function.
Further, leave stable gap respectively with under the state of the first fixed contact 61, the second fixed contact 62 closures at the first moving contact 81, the second moving contact 82 between the actuated piece of described input action service portion 11 and action actuation device 9.
The switching device that adopts clearance between open contacts of the present utility model to amplify as required, by increasing action-changing device and innovate its fixed form on existing switching device, stroke ratio in the time of not only conversion equipment can being moved together with main body is adjusted into 1 to 5 times from fixing 1:1, to increase clearance between open contacts, and the adhesive stage in the stroke before conversion of need not need to accumulate than macro-energy and just can make the contactor adhesive.And then, the utility model is by the Optimal Structure Designing of action-changing device, it is rationally distributed making electromagnetic actuation force and spring force formation power, realized that touch spring and reaction spring active force are on a line, stressed concentrating, reliability is high,, for making the energy consumption of dual coil electromagnetic system and device in on-state drop to minimum and extending life of product, provides an ingenious solution that can overcome whole defects of above-mentioned prior art.
Description of drawings
Fig. 1 is the structural representation of the clearance between open contacts of the utility model the first embodiment switching device that can amplify as required, and the first moving contact 81 shown in figure, the second moving contact 82 are in respectively the state with the first fixed contact 91, the second fixed contact 92 closures.
Fig. 2 is that the first moving contact 81, the second moving contact 82 shown in Figure 1 is in respectively the structural representation with the state of the first fixed contact 91, the second fixed contact 92 disjunctions.
Fig. 3 is the structural representation of the clearance between open contacts of the utility model the second embodiment switching device that can amplify as required, and the first moving contact 81 shown in figure, the second moving contact 82 are in respectively the state with the first fixed contact 91, the second fixed contact 92 closures.
Fig. 4 is the structural representation of the clearance between open contacts of the utility model the 3rd embodiment switching device that can amplify as required, and the first moving contact 81 in figure, the second moving contact 82 are in respectively the state with the first fixed contact 91, the second fixed contact 92 closures.
Embodiment
, below in conjunction with the embodiment that accompanying drawing 1 to 4 provides, further illustrate the embodiment of the switching device that clearance between open contacts of the present utility model can amplify as required.The utility model is not limited to the description of the direct-acting contactor embodiment of following traveling priority.
Fig. 1,2 is respectively the structural representation that switching device that the clearance between open contacts of the utility model the first embodiment can amplify as required is in closure state, off-state, and the input action service portion 11 of the action bridgeware 1 shown in figure includes only outer service portion 11w.Fig. 3,4 is respectively the structural representation that switching device that the clearance between open contacts of second and third embodiment of the utility model can amplify as required is in closure state, the input action service portion 11 of the action bridgeware 1 shown in Fig. 3 comprises outer service portion 11w, the first laterally interior service portion 11x and vertically interior service portion 11y, and the input action service portion 11 of the action bridgeware 1 shown in Fig. 4 comprises outer service portion 11w and two horizontal interior service portions, i.e. the first laterally interior service portion 11x, the second laterally interior service portion 11n.the something in common of three embodiment of the present utility model that Fig. 1 is extremely shown in Figure 4 is: the switching device that clearance between open contacts can amplify as required comprises the identical body of structure 2, actuator 9 and contact system, contact system comprises the identical strutting piece of structure 3, contact back-moving spring 5 and comprise the first fixed contact 61 and the second fixed contact 62, the movable contact bridge 4 that is formed by the first moving contact 81 and the second moving contact 82, actuator 9 adopts known structure to be connected with the body 2, and, three embodiment include by action bridgeware 1, subtract the action-changing device that power spring 7 forms, and action-changing device to subtract power spring 7 identical with contact back-moving spring 5 operation principles of contact system.The difference of three embodiment is: quantity and concrete structure by input action service portion 11 set on action bridgeware 1 are different, relatively each accompanying drawing as can be known: the quantity of the input action service portion 11 of the first embodiment illustrated in figures 1 and 2 is 1, and its version is to stretch out the outer outer service portion 11w of the body 2.The quantity of the input action service portion 11 of second and third embodiment shown in Fig. 3,4 is 3, the version of one of them is to stretch out the outer outer service portion 11w of the body 2, all the other versions of two are respectively the first horizontal service portion 11x that is positioned at the body 2 and are positioned at vertical service portion 11y of the body 2 in Fig. 3, and are the first horizontal service portion 11x and the second horizontal service portion 11n that is positioned on the body 2 diverse locations in all the other versions of two shown in Figure 4.As seen, the quantity of the input action service portion 11 of action-changing device is at least 1.
Referring to Fig. 1 to three embodiment shown in Figure 4, the switching device that clearance between open contacts of the present utility model can amplify as required comprises the first fixed contact 61 and the second fixed contact 62 that are separately fixed in the insulation body 2, be arranged in the body 2 can traveling priority strutting piece 3, be arranged on movable contact bridge 4 on this strutting piece 3, be separately fixed at the first moving contact 81 on movable contact bridge 4 and the second moving contact 82 and contact back-moving spring 5, at least one actuator 9 and action-changing device.Strutting piece 3 is arranged in the body 2 by known moving sets such as guideway, thereby makes strutting piece 3 form the forms of motion of the degree of freedom that only has a traveling priority.The mounting structure of movable contact bridge 4 on strutting piece 3 can have multiple, as rigidly fixes connection, and this moment, movable contact bridge 4 itself can not strain, movable contact bridge 4 and on moving contact all can not be with respect to strutting piece 3 displacements.And for example flexible fastening connects, and is wherein to be fixedly connected with between movable contact bridge 4 and strutting piece 3, but allows the movable contact bridge 4 can a small amount of strains, makes the moving contact on movable contact bridge 4 can be along the displacement of disjunction/closing direction do with respect to strutting piece 3 in little weight range.Elastic floating connects for another example, owing to having floating connecting structure and being provided with excess of stroke spring between movable contact bridge 4 and strutting piece 3, make moving contact on movable contact bridge 4 can be within the specific limits (being in known excess of stroke scope) do displacement with respect to strutting piece 3 along disjunction/closing direction.The action-changing device of the utility model the first embodiment due to be provided with have excess of stroke function concurrently subtract power spring 7, so in the case, even the mounting structure that does not adopt elastic floating to connect, also can make the first moving contact 81, the second moving contact 82 obtain good contact performance with the first fixed contact 61, the second fixed contact 62 closure the time.This is the effect that by the existing patent 201120352337.0 that electromagnetic mechanism contacts with fixed contact the pressure-driven movable contact bridge of rocking arm, can not be had.For the impact for the disjunction of contact system/closed performance of the foozle of the difficulty of processing that reduces related components and parts, can preferably adopt rear two kinds in above-mentioned three kinds of connected modes, be that the flexible fastening of the function of movable contact bridge 4 with micro-elastic distortion connects or the structure that the elastic floating of excess of stroke spring is connected is set between strutting piece 3 and movable contact bridge 4, they still have the further advantage of improving the performance of contact system.No matter adopt which kind of mounting structure of the present utility model between movable contact bridge 4 and strutting piece 3, always movable contact bridge 4 is with strutting piece 3 traveling priorities.The first moving contact 81, the second moving contact 82 are provided by contact back-moving spring 5 with the disjunction power of the first fixed contact 61, the second fixed contact 62 disjunctions simultaneously respectively, the elastic force Q size of back-moving spring 5 should meet the designing requirement of the disjunction power of contact system, and minimum elastic force Q should equal the disjunction power of designing requirement.Contact back-moving spring 5 is stage clip, the direction of its elastic force Q is identical with the disjunction direction of the first moving contact 81, the second moving contact 82, the direction that is elastic force Q is consistent with the disjunction direction of motion of strutting piece 3, elastic force Q order about the first moving contact 81, the second moving contact 82 respectively with the first fixed contact 61, the disjunctions simultaneously of the second fixed contact 62.One end of contact back-moving spring 5 is connected (wherein comprising the member connection that the equivalent therewith body 2 is fixedly connected with) with the body 2, the other end of contact back-moving spring 5 is connected with strutting piece 3, and namely the two ends of contact back-moving spring 5 are connected with the body 2, strutting piece 3 respectively.
Referring to Fig. 1 to Fig. 4, the first moving contact 81 and the second moving contact 82 are separately fixed at the two ends of movable contact bridge 4, have namely realized the electrical connection between the first moving contact 81 and the second moving contact 82 when the first moving contact 81 and the second moving contact 82 are separately fixed at the two ends of movable contact bridge 4.contact center line C-C shown in Fig. 1-4 is the symmetrical center line of the first moving contact 81 and the second moving contact 82, the first moving contact 81 that is electrically connected and the second moving contact 82 can be with strutting pieces 3 and along contact center line C-C traveling priority, the center line of the moving sets between strutting piece 3 and the body 2 and contact center line C-C overlap, movable contact bridge 4 makes the first moving contact 81 with strutting piece 3 traveling priorities, the second moving contact 82 respectively with the first fixed contact 61, the second fixed contact 62 is disjunction/closure simultaneously, this structure obviously is conducive to improve the first moving contact 81, the second moving contact 82 respectively with the first fixed contact 61, the second fixed contact 62 is the matching property of disjunction/closure simultaneously.
The action-changing device of switching device of the present utility model comprises action bridgeware 1 and subtracts power spring 7, action bridgeware 1 is provided with input action service portion 11 and action output action section 12, should have following relation between them: the arm of force between the center of rotation of input action service portion 11 and revolute pair 8 apart from a less than the arm of force distance b of moving between the center of rotation of output action section 12 and revolute pair 8.Arm of force distance b described here and the arm of force are 1＜b:a＜5 apart from the preferable range of the ratio of a, and namely stroke ratio b:a is the value between 1 to 5.Input action service portion 11 on action bridgeware 1 shown in Fig. 1-4 includes and stretches out the outer outer service portion 11w of the body 2, outer service portion 11w must have in input action service portion 11, as contactor, is positioned at the actuator as electromagnetic mechanism 9 outside the body 2 to the position of contact system input control action.In the situation that Fig. 1 and the first embodiment shown in Figure 2 only have an outer service portion 11w on action bridgeware 1, input action service portion 11 is exactly outer service portion 11w.for meeting the needs of polynary control, also comprise the first horizontal service portion 11x and/or the vertical service portion 11y that are positioned at the body 2 in the input action service portion 11 of described action bridgeware 1, the situation of the second embodiment as shown in Figure 3, action bridgeware 1 comprises an outer service portion 11w, also comprise one first laterally interior service portion 11x and a vertically interior service portion 11y, the situation of the 3rd embodiment as shown in Figure 4, the action bridgeware comprises an outer service portion 11w, also comprise two laterally interior service portions, namely first laterally in service portion 11x, the second laterally interior service portion 11n.Another implication that above-mentioned arm of force distance b and the arm of force are 1＜b:a＜5 apart from the preferable range of the ratio of a refer in input action service portion 11 outer service portion 11w, first laterally in service portion 11x, vertically in the arm of force of service portion 11y can not wait apart from a, arm of force distance b respectively and their each arm of forces be some value between 1 to 5 apart from the ratio of a.Input action service portion 11 contacts cooperation with the actuated piece (not shown) of actuator 9, a kind of preferred ideal scheme is, it is vertical with contact center line C-C that the actuated piece of actuator 9 acts on the direction of the actuating force Pw on outer service portion 11w, such overall structure is conducive to the miniaturization of switching device, can also finely meet product installation requirement in use simultaneously.this shows, action-changing device of the present utility model not only has the amplification translation function of stroke ratio, but also have the function of the actuating force conversion direction of actuator 9 outputs, and has a function of the actuating force of required actuator 9 being dwindled conversion, therefore, actuator 9 shown in the drawings can adopt the universal electromagnetic mechanism that adapts to existing contactor, also can adopt the electromagnetic mechanism of Specialty Design, for example with first laterally in service portion 11x and/or vertically in the suitable actuator of service portion 11y, or be used for the electronic trip unit of various protections, magnetictrip, the actuator that the diversification such as thermal overload release are controlled, they can be used as auxiliary unit and are articulated in selectively outside the body 2, also can be fixedly installed on selectively in the body 2.Articulating here refers to that actuator itself is fixed on outside the body 2, but its actuated piece can reach in the body 2 by the hole that is preset on the body 2, and with the body 2 in first laterally in service portion 11x or vertically in service portion 11y contact cooperation.The installation requirement that articulates in order to meet different actuators, first laterally in service portion 11x and vertically in the setting of service portion 11y should meet the requirement of following layout structure: the actuated piece of actuator act on first laterally in the direction of actuating force Pnx on service portion 11x parallel with contact center line C-C, it is vertical with contact center line C-C that the actuated piece of actuator acts on the direction of the actuating force Pny on vertical interior service portion 11y.
The action bridgeware 1 of action-changing device is pivotally mounted on the body 2 by revolute pair 8, revolute pair 8 can have various structures, preferred following two kinds of advantages of simple and be easy to the structure of Installation and Debugging wherein: a kind of is revolute pair 8 for being formed on the pivot (not shown) on action bridgeware 1 and being formed on axis hole (not shown) on the body 2, and action bridgeware 1 inserts in axis hole and forms the pivotable installation by pivot; Another kind is described revolute pair 8 for being formed on the protruding axle (not shown) on the body 2 and being formed on pivot hole (not shown) on action bridgeware 1, and action bridgeware 1 is contained in and forms pivotable on protruding axle on the body 2 and install by the pivot borehole jack.The power spring 7 that subtracts of action-changing device is preferably torsion spring, its end is connected with action bridgeware 1, its other end is connected with the body 2, thus by the elastic force that subtracts power spring 7 act on the action bridgeware 1 on and form moment M, the fulcrum of this moment M is exactly the center of rotation of revolute pair 8.Obviously, the form of the power of subtracting spring 7 of the present utility model is not limited to torsion spring, can also be extension spring, stage clip, can provide a moment M take revolute pair 8 as fulcrum to action bridgeware 1, provide actuating force by action bridgeware 1 to the closure of contact system by this moment M, namely this moment M be used for to drive strutting piece 3 and makes the first moving contact 81, the second moving contact 82 closed simultaneously with the first fixed contact 61, the second fixed contact 62 respectively, because this actuating force is elastic force, naturally have the function of excess of stroke spring concurrently so that subtract power spring 7.Realize providing actuating force also must meet the following conditions by moment M to the closure of contact system: the elastic force Q of contact back-moving spring 5 is opposite by the moment m that strutting piece 3 acts on action bridgeware 1 with the direction that the elastic force that subtracts power spring 7 acts on the moment M on action bridgeware 1, and the elastic force that subtracts power spring 7 acts on the moment M that moves on bridgeware 1 greater than described moment m.the contact force of the utility model contact system and disjunction power are respectively by subtracting power spring 7 and back-moving spring 5 provides, therefore comprise that the size of actuating force of each actuating mechanism of electromagnetic mechanism is as long as meet greater than a set point, no matter described actuating force greater than described set point what, can not affect contact force and the disjunction power of contact system greater than the actuating force of part, so got rid of the External force interference of the closure that affects switching device/disjunction stability, not only improved the closure/interrupting performance of switching device, but also greatly expanded the model scope of compatible multiple actuating mechanism.Because the disjunction of contact system is that input action service portion 11 is while being pressed, while being contact system closed, the actuated piece of actuating mechanism is to the input action service portion 11 even contact of not exerting pressure, so that the disjunction of each actuating mechanism action do not interfere with each other, but hang over all disjunction control of complete independently to contact system of any one actuator on action bridgeware 1, thereby for realizing that polynary control provides possibility.And the utility model the first moving contact 81, the second moving contact 82 respectively with the state of the first fixed contact 61, the second fixed contact 62 closures under, being provided with gap between the actuated piece that allows actuating mechanism and input action service portion 11 does not contact, so not only can greatly reduce actuating mechanism 9 and be installed to difficulty on the body 2, and the actuated piece of various actuating mechanisms can be suspended on each input action service portion 11 on action bridgeware 1 easily.
The setting that subtracts power spring 7 has reduced the actuating force of required actuating mechanism, make action-changing device in the stroke that amplifies contact (opening distance), avoided the actuating force of existing actuating mechanism multiply by again the problem that the stroke amplification ratio is amplified by the disjunction power of contact and the contact force stack sum of contact., in order to further illustrate this advantage, below provide the computational methods of the minimum set point of the required actuating force of the actuating mechanism of the switching device that clearance between open contacts of the present utility model can amplify as required:
R*a+Q*b=j*b, (wherein Q*b=m, j*b=M)
In formula: R acts on actuating force on input action service portion 11 for actuating mechanism under contact system disjunction state, a is the arm of force distance between the center of rotation of input action service portion 11 and revolute pair 8, Q is the elastic force of contact back-moving spring 5, equal the design load of the disjunction power of known contact, b is the arm of force distance between the center of rotation of action output action section 12 and revolute pair 8, and j subtracts power spring 7 to act on power on strutting piece 3 by moving output action section 12.Principle according to action-changing device can obtain, for making contact system normally closed j should meet the condition of j=Q+i, i is the design load of the contact force of contact, if stroke amplification ratio k=b:a, can calculate action bridgeware 1 is R*a+Q*b=j*b in the stress balance condition without under other External Force Acting, Q*b=m wherein, j*b=M, i.e. R=(j-Q) * k=i*k.
This shows, the minimum set point of the actuating force that actuating mechanism is required can be got R, when the actuating force of actuating mechanism reality during greater than R, can guarantee the normal disjunction of contact system, in other words, it is long-pending that the condition that meets contact system normal operation is that the actuating force of actuating mechanism reality multiply by stroke amplification ratio k greater than the contact force i of contact, and it is long-pending that the disjunction power Q that has reduced contact than prior art multiply by stroke amplification ratio k.Owing to there being very large attraction between closure state lower moving contact and fixed contact, to consider again and reduce the potential safety hazard that the adhesion between moving contact and fixed contact causes, generally the disjunction power of contact system need to be far longer than its contact force, the structure decrease of visible the utility model by subtracting power spring 7 required very most actuating force and the institute's work of existing actuating mechanism.
Action output action section 12 contacts with strutting piece 3 and coordinates and transmit power and action, refer to move in this what is called " contact coordinate " and coordinating between output action section 12 and strutting piece 3 have following characteristics: in the process of transmission power and action, contact all the time between input action service portion 11 and actuated piece; In the process of not transmitting power and action, allow to contact or not contact between action output action section 12 and strutting piece 3.Specifically, under normal circumstances, due between action output action section 12 in the disjunction at contact system and closed process and strutting piece 3, there is all the time the transmission of power and action, so move, contact all the time between output action section 12 and strutting piece 3.But, in improper situation, as excessive in the actuating force of actuating mechanism or thread off that action is too fast, occur between moving contact and fixed contact slightly bonding, likely occur because the disjunction response speed of strutting piece 3 causes between action output action section 12 and strutting piece 3 discontiguous phenomenon of moment slowly, but this phenomenon can't affect the normal disjunction of contact system.Contact the form that coordinates between action output action section 12 and strutting piece 3 and be the cooperation that contacts on cambered surface and plane, preferably scheme is that the contact mating surface that moves in output action section 12 is cambered surface, and the contact mating surface on strutting piece 3 is plane.Also cambered surface contacts cooperation with cambered surface, and the contact mating surface that namely moves in output action section 12 is cambered surface with the mating surface that contacts on strutting piece 3.The elastic force Q of contact back-moving spring 5 acts on strutting piece 3 along contact center line C-C, and strutting piece 3 contacts cooperation at the upper action efferent 12 with action bridgeware 1 of contact center line C-C.Obviously, elastic force Q and action efferent 12 that such structure is arranged to act on strutting piece 3 pass to actuating force on strutting piece 3 all on contact center line C-C, make the distribution of force on strutting piece 3 very reasonable, the motion of strutting piece 3 is steady, operation precision is high.The action efferent 12 of action bridgeware 1 of the present utility model can be for a plurality of, be at least 1, they can be laid along the paper direction perpendicular to Fig. 1-4, are used for contacting with edge each strutting piece 3 cooperations perpendicular to many groups moving contact of the paper direction laying of accompanying drawing respectively.
Claims (10)
1. switching device that clearance between open contacts can amplify as required, comprise the first fixed contact (61) and the second fixed contact (62) that are separately fixed in the body (2), be arranged on the strutting piece (3) of the energy traveling priority in the body (2), be arranged on movable contact bridge (4) on strutting piece (3) by mounting structure, be separately fixed at the first moving contact (81) and the second moving contact (82) that mutually are electrically connected on movable contact bridge (4), contact back-moving spring (5) and at least one actuator (9), the two ends of described contact back-moving spring (5) respectively with the body (2), strutting piece (3) connects, the first moving contact (81) and the second moving contact (82) can be with strutting pieces (3) and along contact center line C-C traveling priority, make the first moving contact (81), the second moving contact (82) respectively with the first fixed contact (61), the second fixed contact (62) is disjunction/closure simultaneously, it is characterized in that:
Described switching device also has an action-changing device, this action-changing device comprises action bridgeware (1) and subtracts power spring (7), described action bridgeware (1) is pivotally mounted on the body (2) by revolute pair (8), and the two ends of the described power of subtracting spring (7) are connected with action bridgeware (1), the body (2) respectively;
described action bridgeware (1) is provided with at least one input action service portion (11) and at least one action output action section (12), and the arm of force between the center of rotation of described input action service portion (11) and revolute pair (8) apart from a less than the arm of force distance b between the center of rotation of described action output action section (12) and revolute pair (8), described input action service portion (11) contacts with the actuated piece of described actuator (9) and coordinates and transmit power and action, described action output action section (12) contacts with described strutting piece (3) and coordinates and transmit power and action,
The direction of the elastic force Q of described contact back-moving spring (5) is consistent with the disjunction direction of motion of strutting piece (3), make elastic force Q act on moment M on action bridgeware (1) and the opposite direction of moment M and moment m by the moment m that strutting piece (3) acts in action bridgeware (1) less than the elastic force that subtracts power spring (7).
2. the clearance between open contacts according to claim 1 switching device that can amplify as required, it is characterized in that: the input action service portion (11) on described action bridgeware (1) comprises the outer service portion (11w) that stretches out outside the body (2), and it is vertical with contact center line C-C that the actuated piece of actuator (9) acts on the direction of the actuating force Pw on described outer service portion (11w).
3. the clearance between open contacts according to claim 1 switching device that can amplify as required, it is characterized in that: the input action service portion (11) on described action bridgeware (1) comprises the first horizontal service portion (11x) of being positioned at the body (2) and the second horizontal service portion (11n)/or vertical service portion (11y), the actuated piece of actuator acts on the first laterally interior service portion (11x), the direction of actuating force Pnx on the second laterally interior service portion (11n) is parallel with contact center line C-C, the direction of actuating force Pny in the actuated piece of actuator acts on vertically on service portion (11y) is vertical with contact center line C-C.
4. the clearance between open contacts according to claim 1 switching device that can amplify as required, it is characterized in that: the elastic force Q of described contact back-moving spring (5) acts on strutting piece (3) along contact center line C-C, and strutting piece (3) is upper at contact center line C-C and the action efferent (12) of described action bridgeware (1) contacts cooperation.
5. the clearance between open contacts according to claim 1 switching device that can amplify as required is characterized in that:
Described revolute pair (8) is for being formed on the pivot and the axis hole that is formed on the body (2) on action bridgeware (1), and action bridgeware (1) inserts formation pivotable in axis hole by pivot and installs; Perhaps
Described revolute pair (8) is for being formed on the protruding axle and the pivot hole that is formed on action bridgeware (1) on the body (2), and action bridgeware (1) is contained in formation pivotable on protruding axle by the pivot borehole jack and installs.
6. the clearance between open contacts according to claim 1 switching device that can amplify as required, it is characterized in that: described arm of force distance b and the described arm of force are 1＜b:a＜5 apart from the preferable range of the ratio of a.
7. the clearance between open contacts according to claim 1 switching device that can amplify as required is characterized in that: contacting the form that coordinates between described action output action section (12) and strutting piece (3) is cambered surface and plane or cambered surface and cambered surface.
8. the clearance between open contacts according to claim 1 switching device that can amplify as required is characterized in that: contacting the form that coordinates between the actuated piece of described input action service portion (11) and action actuation device (9) is cambered surface and plane or cambered surface and cambered surface.
9. the clearance between open contacts according to claim 1 switching device that can amplify as required, it is characterized in that: described mounting structure is the elastic floating syndeton with excess of stroke spring; Perhaps described mounting structure is the flexible fastening syndeton that movable contact bridge (4) has micro-elastic distortion function.
10. the clearance between open contacts according to claim 1 switching device that can amplify as required is characterized in that: leave stable gap respectively with under the closed state of the first fixed contact (61), the second fixed contact (62) at the first moving contact (81), the second moving contact (82) between the actuated piece of described input action service portion (11) and action actuation device (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201749009U CN203288441U (en) | 2013-04-09 | 2013-04-09 | Switching device having contact opening distance capable of being amplified according to requirements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201749009U CN203288441U (en) | 2013-04-09 | 2013-04-09 | Switching device having contact opening distance capable of being amplified according to requirements |
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| Publication Number | Publication Date |
|---|---|
| CN203288441U true CN203288441U (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201749009U Withdrawn - After Issue CN203288441U (en) | 2013-04-09 | 2013-04-09 | Switching device having contact opening distance capable of being amplified according to requirements |
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| Country | Link |
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| CN (1) | CN203288441U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103198943A (en) * | 2013-04-09 | 2013-07-10 | 浙江正泰电器股份有限公司 | Switching device with amplified clearance between open contacts according to needs |
-
2013
- 2013-04-09 CN CN2013201749009U patent/CN203288441U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103198943A (en) * | 2013-04-09 | 2013-07-10 | 浙江正泰电器股份有限公司 | Switching device with amplified clearance between open contacts according to needs |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131113 Effective date of abandoning: 20150603 |
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| RGAV | Abandon patent right to avoid regrant |