CN102044384B - Switching mechanism for minitype plastic shell type circuit breaker - Google Patents
Switching mechanism for minitype plastic shell type circuit breaker Download PDFInfo
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- CN102044384B CN102044384B CN200910178869.4A CN200910178869A CN102044384B CN 102044384 B CN102044384 B CN 102044384B CN 200910178869 A CN200910178869 A CN 200910178869A CN 102044384 B CN102044384 B CN 102044384B
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Abstract
The invention discloses a switching mechanism for a minitype plastic shell type circuit breaker, which can increase the disconnected interval. The switching mechanism comprises a handle, a mechanical power transmission rod, a latch, a fixed contactor, a movable contactor, a spring and a fixed axle, wherein the latch rotates under the action of the mechanical power transmitted by the power transmission rod; the fixed contactor is connected to an electric load of a power supply or circuit; the movable contactor can rotate to the position in contact with the fixed contactor or the position out of contact with the fixed contactor, so as to disconnect or close the circuit, and one end of the movable contactor is connected to the latch; the spring is used for providing elastic force for the movable contactor in the direction of the movable contactor in contact with the fixed contactor when the circuit is closed, and providing elastic force for the movable contactor in the direction of the movable contactor out of contact with the fixed contactor when the circuit is disconnected; and the fixed axle is used for providing a rotating pivot by contacting the outer surface of the movable contactor when the movable contactor rotates to close or disconnect the circuit.
Description
Technical field
The present invention relates to a kind of minitype plastic shell type circuit breaker, relate in particular to a kind of switching mechanism for minitype plastic shell type circuit breaker.
Background technology
Minitype plastic shell type circuit breaker is a kind of electric device, and it,, for disconnecting and the circuit of the closed small electrical load for the apparatus such as in indoor, building and in factory etc., is not subject to the impact such as the abnormal current of overload and short circuit etc. with protective circuit.
Multiple minitype plastic shell type circuit breakers are installed in distribution panelboard.In distribution panelboard, use multiple minitype plastic shell type circuit breakers may need expensive manufacturing cost and high Assembling Production power.Correspondingly, need to have the switching mechanism of miniature dimensions and simple structure and the extinguishing arc mechanism for minitype plastic shell type circuit breaker always.
In addition, need the switching mechanism for minitype plastic shell type circuit breaker always, this switching mechanism is because longer disconnection spacing can implement to have the remarkable cut-out function of higher nominal electric current, and this disconnection spacing is implemented as movable contactor and separates with fixed contact when circuit opening operation (trip operation).
Traditional switching mechanism for minitype plastic shell type circuit breaker has larger size and complicated assembly structure.
Equally, use three springs such as main spring, trip spring and contact spring.
Equally, cut-out function is lower, and also, owing to disconnecting, the shorter rated current that makes of spacing is lower.
Summary of the invention
Therefore, the object of this invention is to provide a kind of switching mechanism for minitype plastic shell type circuit breaker, this switching mechanism can have miniature dimensions and simple structure, and can realize remarkable cut-out function due to the disconnection spacing compared with long.
In order to reach these and other advantages and according to object of the present invention, as implemented and generalized description at this, to provide a kind of switching mechanism for minitype plastic shell type circuit breaker, it comprises:
Handle, it provides the mode of manual operation minitype plastic shell type circuit breaker to open position (so-called "off" position) or make position (so-called " conducting " position);
Machine power drive link, its one end is connected to this handle;
Breech lock, it is connected to the other end of machine power drive link, and rotates by the machine power of being transmitted by machine power drive link;
Fixed contact, it is connected to the electric loading of power supply or power circuit;
Movable contactor, its can rotate to the position of contact fixed contact or the position that separates with fixed contact to disconnect or closed circuit, one end of movable contactor is connected to breech lock to rotate up in the side identical with breech lock, and movable contactor has multiple contact surfaces of contact pivot point;
Spring, its one end is connected to movable contactor, for contacting in the direction of fixed contact as movable contactor provides elastic force at movable contactor in the time that closing of circuit operate, and in the direction of separating at movable contactor and fixed contact in the time of circuit opening operation for movable contactor provides elastic force; And
Fixed axis, it is constructed to, in the time that movable contactor rotates with closure or open circuit, provide pivot point by the outer surface of contact movable contactor.
Foregoing and other object of the present invention, feature, scheme and advantage are by from below becoming apparent detailed description by reference to the accompanying drawings.
Brief description of the drawings
Included accompanying drawing provides further understanding of the invention, and accompanying drawing is incorporated in specification and forms a part for specification, has illustrated embodiments of the present invention and has been used from and explains principle of the present invention with specification one.
In the accompanying drawings:
Fig. 1 is the longitudinal section according to minitype plastic shell type circuit breaker of the present invention, and it represents the circuit off-state of the switching mechanism by having removed trip(ping) bar;
Fig. 2 is the longitudinal section according to minitype plastic shell type circuit breaker of the present invention, and it represents the closing of circuit state of the switching mechanism by having removed trip(ping) bar;
Fig. 3 is according to the stereogram of the movable contactor of the switching mechanism for minitype plastic shell type circuit breaker of the present invention;
Fig. 4 is the enlarged drawing of chain-dotted line in Fig. 3 " A ", and it represents according to the movable contactor of the switching mechanism for minitype plastic shell type circuit breaker of the first embodiment of the present invention;
Fig. 5 is the partial enlarged drawing of chain-dotted line in Fig. 3 " A ", and it represents the movable contactor of the switching mechanism for minitype plastic shell type circuit breaker according to a second embodiment of the present invention;
Fig. 6 is according to the exploded perspective view of the switching mechanism for minitype plastic shell type circuit breaker of the present invention, and it represents according to relative position, shape and the rigging position of the movable contactor of the switching mechanism for minitype plastic shell type circuit breaker of the present invention, movable contactor lid, breech lock and trip(ping) bar;
Fig. 7 is the longitudinal section according to minitype plastic shell type circuit breaker of the present invention, and it represents the circuit open mode of the switching mechanism by having trip(ping) bar;
Fig. 8 is the longitudinal section according to minitype plastic shell type circuit breaker of the present invention, and it represents the closing of circuit state of the switching mechanism by having trip(ping) bar; And
Fig. 9 is the view representing according to the shape of the assembly of the switching mechanism for minitype plastic shell type circuit breaker of the present invention, and represents the assembling process of assembly.
Embodiment
Provide detailed description of the invention now with reference to accompanying drawing.
Fig. 1 is the longitudinal section according to minitype plastic shell type circuit breaker of the present invention, and it is by having removed the circuit off-state of switching mechanism of trip(ping) bar.
With reference to Fig. 1, the switching mechanism for minitype plastic shell type circuit breaker according to the present invention comprises handle 21, power transmission pole 22, breech lock 23, fixed contact 29, movable contactor 27, spring 26 and fixed axis 25.
Handle 21 provides the mode of a kind of manual operation minitype plastic shell type circuit breaker to open position (so-called "off" position) or make position (so-called " conducting " position).; user can be by his or she operating grip 21 to " conducting " position or "off" position operate minitype plastic shell type circuit breaker to " conducting " position or "off" position; in " conducting " position because minitype plastic shell type circuit breaker connecting circuit; electric current can correspondingly flow to electric loading from power supply in circuit; in "off" position, because minitype plastic shell type circuit breaker cuts off (so-called disconnection) circuit, electric current correspondingly can not flow in circuit.Handle 21 is provided with the axle accommodation section that is connected to supporting axial region, and this supporting axial region is integrated in below by the upper end of moulding shell 40 of explaining.Handle 21 be mounted for can be rotated to support on supporting axial region inserted the state in axle accommodation section.Allow " conducting " position of operating grip within the scope of 21 to its or the lever operated opening of "off" position to be arranged on the upper surface of moulding shell 40.
One end of power transmission pole 22 is connected to handle 21.Correspondingly, power transmission pole 22 applies user manual force by handle 21 transfers to other assemblies of switching mechanism, or power is transferred to handle 21 from another assembly of switching mechanism.Power transmission pole 22 is the bar members with approximate " M " shape, and has two legs at its two ends.In the time that the two legs of power transmission pole 22 is inserted into the bar connection opening that is arranged on handle 21 and breech lock 23, power transmission pole 22 is connected to handle 21 and breech lock 23.
Breech lock 23 is connected to the other end of power transmission pole 22, and the power of being transmitted by power transmission pole 22 is rotated.The shape of breech lock 23 and structure are described in detail in connection with Fig. 6 and Fig. 9.
Fixed contact 29 is connected to power supply or the electric loading of circuit (power circuit), and is provided with contact 29a in its end.Once fixed contact 29 is electrically connected to the power supply of circuit, movable contactor 27 is just electrically connected to the electric loading of circuit.On the contrary, once fixed contact 29 is electrically connected to the electric loading of circuit, movable contactor 27 is just electrically connected to the power supply of circuit.As shown in Figure 1, fixed contact 29 has contact 29a.
Movable contactor 27 can rotate to the position of contact fixed contact 29 or the position that separates with fixed contact 29 to disconnect or closed circuit.Movable contactor 27 has the one end that is connected to breech lock 23 to the direction rotation identical with breech lock 23, and has the contact surface of multiple contact pivot points.At this, pivot point can refer to fixed axis 25.As shown in Figure 1, movable contactor 27 has contact 27b-1.
One end of spring 26 is connected to movable contactor 27, and the other end is fixed to moulds shell 40.Moulding shell 40 forms to the shell of the minitype plastic shell type circuit breaker that is known as mold cased circuit breaker or circuit breaker is provided by molded electrical insulating material.The shell 40 of moulding that is used as the shell of minitype plastic shell type circuit breaker is contained in the assembly of the minitype plastic shell type circuit breaker such as switching mechanism, tripping mechanism and extinguishing arc mechanism wherein.When movable contactor 27 contacts the closing of circuit operation of fixed contact 29, spring 26 contacts at movable contactor 27 in the direction of fixed contact 29 as movable contactor 27 provides elastic force.But, in the circuit opening operation separating at movable contactor 27 and fixed contact 29, in the direction that spring 26 separates at movable contactor 27 and fixed contact 29 for movable contactor 27 provides elastic force.
When movable contactor 27 rotates to disconnect or when closed circuit, provides pivot point thereby fixed axis 25 contacts the outer surface of movable contactor 27.Fixed axis 25 is positioned to be adjacent to movable contactor 27 and be connected to the part of one end of spring 26.Equally, fixed axis 25 can be constructed to be fixed to the extra metal shaft of moulding shell 40, or is integrated in the axial processes of moulding shell 40.
With reference to Fig. 1, Reference numeral 40a refers to and moulds the region that extinguishing arc mechanism (with reference to 33 in Fig. 7) will be installed in shell 40, and Reference numeral 40b refers to and moulds the region that tripping mechanism (with reference to Fig. 7 and Fig. 8) will be installed in shell 40.And Reference numeral 40c1 and 40c2 refer to respectively and will the terminal installation region of power terminal and electric loading terminal be installed.
Reference numeral 24 refers to trip(ping) bar, and it can be exerted pressure and be rotated by the tripping mechanism of minitype plastic shell type circuit breaker, and is connected to breech lock 23 by axle.The structure of trip(ping) bar 24 is described in detail with reference to Fig. 6.
Reference numeral 30 refers to the movable contactor lid that is connected to breech lock 23 by axle and movable contactor 27, it has for fixed axis 25 being inserted to axle accommodation hole portion wherein, and is constructed in the direction identical with breech lock 23, centered by fixed axis 25, to rotate.The shape of movable contactor lid 30 and connection status are described in detail with reference to Fig. 6 and Fig. 9.
Fig. 3 is according to the stereogram of the movable contactor of the switching mechanism for minitype plastic shell type circuit breaker of the present invention.Fig. 4 is the enlarged drawing of chain-dotted line in Fig. 3 " A ", and it represents according to the movable contactor of the switching mechanism for minitype plastic shell type circuit breaker of the first embodiment of the present invention.Fig. 5 is the partial enlarged drawing of chain-dotted line in Fig. 3 " A ", and it represents the movable contactor of the switching mechanism for minitype plastic shell type circuit breaker according to a second embodiment of the present invention.
Movable contactor 27 has multiple contact surfaces, outer surface contact pivot point (, the fixed axis 25 in Fig. 1).Multiple contact surfaces of movable contactor 27 can be constructed to have multiple surfaces of different curvature radius.As shown in " A " in Fig. 3, multiple contact surfaces of movable contactor 27 can be included in the first surface of the fixed axis 25 in the position hookup 1 that contacts fixed contact 29, with the second surface that contacts fixed axis 25 in the position separating with fixed contact 29 and rotate.
As shown according to Fig. 4 of the first embodiment of the present invention, the first surface of movable contactor 27 can be constructed to inclined surface 27a-3, and the second surface of movable contactor 27 can be constructed to curved surfaces 27a-4.
As shown in Fig. 5 according to a second embodiment of the present invention, the first surface of movable contactor 27 can be constructed to have curved surfaces 27a '-3 of predetermined first curvature radius, and the second surface of movable contactor 27 can be constructed to have the second curved surfaces 27a '-4 of the radius of curvature that is less than first curvature radius.
As shown in Figure 3, movable contactor 27 can comprise supporting board 27a and the 27b of contactor portion with contact.According to an embodiment, supporting board 27a is formed by iron, and the 27b of contactor portion is formed by copper.That is to say the element that movable contactor 27 can be constructed to be formed by different materials.According to another embodiment, supporting board 27a and the 27b of contactor portion can be by integrated each other by forming such as the same material of iron or copper.
Reference numeral 27a-1 in Fig. 3 refers to the axle hole 27a-1 that below contactor of the breech lock 23 of explanation is connected to axial region (with reference to the 23a of figure 7) for inserting.Reference numeral 27a-2 in Fig. 3 refer to for the end by combined spring support spring (with reference to figure 1 26) spring junction surface.Preferably, spring junction surface 27a-2 is formed as hook-type.
Hereinafter, with reference to Fig. 6 and Fig. 9, relative position, shape and the assembly method of the switching mechanism for minitype plastic shell type circuit breaker according to the present invention are elaborated.
The structure of movable contactor 27 has been described in detail with reference to Fig. 3, therefore will omit the explanation of the same configuration to movable contactor 27.
Movable contactor lid 30 is to have " U " shape cross section member, this member by by a pair of " V " shape board in the rear side formation that is connected to each other.Movable contactor lid 30 comprises a pair of breech lock connecting shaft hole 30a of portion that is arranged to the upper end that penetrates a pair of board, is arranged to a pair of fixed axis receiver hole 30b at the middle part that penetrates a pair of board, and is arranged to the trip rod connecting hole 30c of the lower end that penetrates a pair of board.
Breech lock 23 comprises elliptical body portion, and the contactor of giving prominence to forward from main part connects axial region 23a, and from the rearwardly projecting power transmission pole tube connector 23b of portion of main part.
Trip(ping) bar 24 has arc one side surface and the bossed planar shaped opposite side of tool surface.Trip(ping) bar 24 comprises the upper end 24a outstanding from the upper end of arc one side surface; The movable contactor lid that is arranged on the upside (left side in Fig. 6) of front surface connects projection 24b; Be arranged on its lower end so that towards sideways tripping force acceptance division 24c, the trip operation (circuit opening operation) for reception with the tripping mechanism 32 of enforcement Fig. 7; Allow to connect the tripping operation bowl cover tube connector 24d of portion of tripping operation bowl cover 31; And the tripping operation bowl cover tube connector 24d of portion that is arranged on the rear surface of trip(ping) bar 24 is illustrated in the right side in the dotted line frame on the right of Fig. 9.
As shown in Figure 9, the switching mechanism for minitype plastic shell type circuit breaker according to the present invention may further include tripping operation bowl cover 31.
Tripping operation bowl cover 31 comprises elliptical body portion, from main part to the lid extension 31c extending laterally, be formed on backward and onwards the 31a of cover slot portion of a side of main part, and (right side Fig. 9) outstanding bar connects projection 31b from main part to front side.
The end that the movable contactor lid that the 31a of cover slot portion is suitable for that the trip(ping) bar connecting hole 30c (with reference to Fig. 6) via movable contactor lid 30 is extended connects projection 24b (with reference to Fig. 6) is arranged on wherein.As shown in rightmost figure in Fig. 9, the rear portion of the 31a of cover slot portion is sealed.When the free end that connects projection 24b (with reference to Fig. 6) when the movable contactor lid of trip(ping) bar 24 is installed to the 31a of cover slot portion of tripping operation bowl cover 31, the confined state between movable contactor lid 30 and the trip(ping) bar 24 that can keep connecting.
As shown in Figure 9, bar connects projection 31b and is installed to the tripping operation bowl cover tube connector 24d of portion below that is arranged on trip(ping) bar 24, and trip(ping) bar 24 and tripping operation bowl cover 31 are connected to each other.
As shown in rightmost figure in Fig. 9, the end of the lid extension 31c of tripping operation bowl cover 31 is positioned to contact the upper surface of the movable contactor lid 30 of the breech lock connecting shaft hole 30a of portion (with reference to Fig. 6) of contiguous movable contactor lid 30.Simultaneously, the end of the lid extension 31c of tripping operation bowl cover 31 is positioned to contact the end that the contactor of breech lock 23 connects axial region 23a, and contactor connects axial region 23a by the axle hole 27a-1 of the breech lock connecting shaft hole 30a of portion (with reference to Fig. 6) and movable contactor 27.Lid extension 31c can comprise bent member to have elastic force to keep the contact condition of movable contactor 27, movable contactor lid 30 and breech lock 23.For this reason, tripping operation bowl cover 31 can form by molded and shaped synthetic resin.By lid extension 31c, can keep the connection status (confined state) between movable contactor 27, movable contactor lid 30 and breech lock 23.
Hereinafter, explanation is assembled according to the method for the switching mechanism for minitype plastic shell type circuit breaker of the present invention.
First, movable contactor lid 30 is installed to surround the top of movable contactor 27, more specifically, so that the top of movable contactor 27 (being supporting board 27a) can be between two of movable contactor lid 30 board.At this, the breech lock connecting shaft hole 30a of portion of the axle hole 27a-1 of movable contactor 27 and movable contactor 30 aligns the program communicating with each other for follow-up.
Next, the contactor of breech lock 23 connection axial region 23a is inserted into the axle hole 27a-1 of movable contactor 27 and the breech lock connecting shaft hole 30a of portion of movable contactor 30.Correspondingly, formed the semi-finished product assembling of movable contactor 27, movable contactor lid 30 and breech lock 23.
The movable contactor lid of trip(ping) bar 24 connects projection 24b and is inserted in the trip(ping) bar connecting hole 30c of movable contactor lid 30, thereby obtains the trip(ping) bar 24 that is constructed to be installed to semi-finished product assembly.
Next, assembling tripping operation bowl cover 31.The free end of the movable contactor lid connection projection 24b (with reference to Fig. 6) of trip(ping) bar 24 is installed to the 31a of cover slot portion of tripping operation bowl cover 31.Meanwhile, as shown in Figure 9, bar connects projection 31b and is installed to the tripping operation bowl cover tube connector 24d of portion that is arranged on trip(ping) bar 24 rear surfaces, thereby trip(ping) bar 24 and tripping operation bowl cover 31 are coupled to each other.The end of lid extension 31c is positioned to contact the upper surface of the movable contactor lid 30 of the breech lock connecting shaft hole 30a of portion (with reference to Fig. 6) of contiguous movable contactor lid 30.Simultaneously, the end of the lid extension 31c of tripping operation bowl cover 31 is positioned to contact the end that the contactor of breech lock 23 connects axial region 23a, and contactor connects axial region 23a by the axle hole 27a-1 of the breech lock connecting shaft hole 30a of portion (with reference to Fig. 6) and movable contactor 27.Correspondingly, obtain the assembling of movable contactor 27, movable contactor lid 30, breech lock 23, trip(ping) bar 24 and tripping operation bowl cover 31.
Next, assemble each other according to spring, power transmission pole and the handle of the switching mechanism for minitype plastic shell type circuit breaker of the present invention.Correspondingly, obtain according to the switching mechanism for minitype plastic shell type circuit breaker of the present invention, be described with reference to Fig. 1.
Handle 21 is provided with the axle accommodation section that is connected to supporting axial region, and this supporting axial region is integrated into the upper end of moulding shell 40.Handle 21 is mounted at supporting axial region and has inserted under the state in axle accommodation section by rotatably mounted.
Handle 21 is provided with a bar connection opening, for connect the shank (not shown) of power transmission pole 22 in one side.
By described structure, a shank in a pair of shank of power transmission pole 22 inserts in the bar connection opening of handle 21.And another shank of power transmission pole 22 inserts in the power transmission pole tube connector 23b of portion (with reference to Fig. 6) of breech lock 23.Correspondingly, handle 21, power transmission pole 22 and bar 23 are connected to each other so that interlocked with one another.
Next, one end of spring 26 engages by spring junction surface 27a-2 (with reference to Fig. 6), and the other end of spring 26 is by engaging from moulding the fixing outstanding spring-loaded projection (not shown) of shell 40.Correspondingly, completed according to the assembling process of the switching mechanism for minitype plastic shell type circuit breaker of the present invention.
Hereinafter, describe in detail according to the operation of the switching mechanism for minitype plastic shell type circuit breaker of the present invention with reference to Fig. 1 to Fig. 3 and Fig. 6 to Fig. 8.
First, (the circuit open position that movable contactor as shown in Figure 1 separates with fixed contact) is operated to " conducting " position (i.e. the circuit closed position of movable contactor contact fixed contact as shown in Figure 2) by illustrating from "off" position.
Once " conducting " position (right side in figure) in the state of user's Manual operation handle 21 to Fig. 1, user's manual force transfers to breech lock 23 by power transmission pole 22.That is to say, when the connecting portion of handle 21 and power transmission pole 22 is along with handle 21 turns clockwise (lower right in Fig. 1) during to right side, power transmission pole 22 also moves to lower right.Correspondingly, the breech lock 23 that is connected to power transmission pole 22 also moves to lower right.In the time that breech lock 23 moves to lower right, the movable contactor 27 and the movable contactor lid 30 that are connected to breech lock 23 also will move to lower right.But because movable contactor lid 30 is connected to fixed axis 25 just in order to rotate, movable contactor lid 30 turns clockwise on its position.At this, movable contactor 27 (is the curved surfaces 27a-4 Fig. 4 from second surface centered by fixed axis 25, or the second curved surfaces 27a '-4 in Fig. 5) state of contact fixed axis 25 turns clockwise to the position of first surface (be the inclined surface 27a-3 in Fig. 4, or the first curved surfaces 27a '-3 in Fig. 5) contact fixed axis 25.At this, state is from the state variation of the second curved surfaces 27a '-4 contacts fixed axis 25 with small curvature radius to the first curved surfaces 27a '-3 or have a state of the inclined surface 27a-3 contact fixed axis 25 of larger radius of curvature.As a result, movable contactor 27 turns clockwise in Fig. 2 and Fig. 3.At this, spring 26 contacts at movable contactor 27 in the direction of fixed contact 29 elastic force is provided.Correspondingly, movable contactor 27 rotates to contact with fixed contact 29 more quickly.Touched after fixed contact 29 at movable contactor 27, the elastic force of spring 26 is as the contact that keeps the contact condition between movable contactor 27 and fixed contact 29.
Next, explanation is contacted to the operation of the circuit open position (open position) that the circuit closed position (conduction position) of fixed contact separates to the movable contactor shown in Fig. 1 and Fig. 7 and fixed contact with the movable contactor shown in Fig. 8 from Fig. 2.
In the time that the circuit in Fig. 8 occurs abnormal currents such as short circuit, the operating side of the moving core of tripping mechanism is moved to right side.At this, tripping mechanism comprises the coil that is electrically connected to circuit, and the moving core that can be moved by the electromagnetic force of coil.In the time moving to right side, the operating side of moving core promotes the tripping force acceptance division 24c of trip(ping) bar 24.As a result, trip(ping) bar 24 is rotated counterclockwise in the state shown in Fig. 7.In the time that trip(ping) bar 24 is rotated counterclockwise, the movable contactor lid 30 that is connected to movable contactor lid connection projection 24b is rotated counterclockwise.Equally, movable contactor 27, the breech lock 23 that is connected to movable contactor lid 30 and contactor connecting axle divide 23a (with reference to Fig. 6) to be also rotated counterclockwise.At this, movable contactor 27 (is the inclined surface 27a-3 Fig. 4 from first surface centered by fixed axis 25, or the first curved surfaces 27a '-3 in Fig. 5) state of contact fixed axis 25 is rotated counterclockwise to the position of second surface (be the curved surfaces 27a-4 in Fig. 4, or the second curved surfaces 27a '-4 in Fig. 5) contact fixed axis 25.At this, state from the first curved surfaces 27a '-3 or the state variation with the inclined surface 27a-3 contact fixed axis 25 of larger radius of curvature contact the state of fixed axis 25 to second curved surfaces 27a '-4 with small curvature radius.As a result, movable contactor 27 turns clockwise having in Fig. 1 of disconnection spacing of increase and Fig. 2, and this disconnection spacing refers to the distance that movable contactor 27 and fixed contact 29 separate.At this, in the direction that spring 26 separates at movable contactor 27 and fixed contact 29, provide elastic force.Correspondingly, movable contactor 27 rotates to separate with fixed contact 29 quickly.After movable contactor 27 separates with fixed contact 29, the elastic force of spring 26 is as the bias force that keeps movable contactor 27 with the separated position of fixed contact 29.
As previously mentioned, the switching mechanism for minitype plastic shell type circuit breaker according to the present invention comprises a spring.In closing of circuit operation, spring is for increasing the contact between movable contactor and fixed contact.But in circuit opening operation, spring is for accelerating separating of movable contactor and fixed contact.Correspondingly, assembly is simplified, and has strengthened Assembling Production power.
Switching mechanism for minitype plastic shell type circuit breaker according to the present invention is included as movable contactor provides the fixed axis of pivot point.And movable contactor contacts multiple contact surfaces of fixed axis while having rotation.Correspondingly, the anglec of rotation of movable contactor increases in circuit opening operation.As a result, movable contactor increases with the disconnection spacing that fixed contact separates, thereby has improved circuit breaking cpacity.
Switching mechanism for minitype plastic shell type circuit breaker according to the present invention is included as movable contactor provides the fixed axis of pivot point.Movable contactor is included in the first surface of the position contact fixed axis of contact fixed contact, and contacts the second surface of fixed axis in the position separating with fixed contact 29 and rotate.And first surface is set to inclined surface, second surface is set to curved surfaces.Correspondingly, the anglec of rotation of movable contactor increases in circuit opening operation.As a result, movable contactor increases with the disconnection spacing that fixed contact separates, thereby has improved circuit breaking cpacity.
Switching mechanism for minitype plastic shell type circuit breaker according to the present invention is included as movable contactor provides the fixed axis of pivot point.Movable contactor is included in the first surface of the position contact fixed axis of contact fixed contact, and contacts the second surface of fixed axis in the position separating with fixed contact 29 and rotate.And first surface is set to have the first curved surfaces of predetermined first curvature radius, second surface is set to have the second curved surfaces of the radius of curvature that is less than first curvature radius.Correspondingly, the anglec of rotation of movable contactor increases in circuit opening operation.As a result, movable contactor increases with the disconnection spacing that fixed contact separates, thereby has improved circuit breaking cpacity.
At the switching mechanism for minitype plastic shell type circuit breaker according to the present invention, the supporting board of movable contactor and contactor portion are by integrated each other by forming such as the same material of iron or copper.Correspondingly, reduced manufacturing cost.
Previous embodiment and advantage are only exemplary and should not be construed as restriction the present invention.This instruction can easily be applied to the device of other types.Specification is intended to the scope of explaination instead of restriction claim.Multiple replacement, improvement and variation are apparent for a person skilled in the art.Feature, structure, method and other characteristics of exemplary embodiment described here can combine to obtain exemplary embodiment additional and/or that replace in many ways.
Because feature of the present invention can implement not deviate from its characteristic in a variety of forms, what will also be understood that is that above-described embodiment is not limited by any details of above stated specification, except as otherwise noted, and should be broadly interpreted as in the scope limiting in subsidiary claim, thereby all changes and improvements that fall into the boundary of claim and scope change, or being equal to of described boundary and scope replace that to be intended to the claim of being attached included.
Claims (11)
1. for a switching mechanism for minitype plastic shell type circuit breaker, it comprises:
Handle, it provides described in a kind of manual operation minitype plastic shell type circuit breaker to the mode of open position or make position;
Power transmission pole, its one end is connected to described handle;
Breech lock, it is connected to the other end of described power transmission pole, and rotates by the mechanical force of being transmitted by described power transmission pole;
Fixed contact, it is electrically connected to the electric loading of power supply or power circuit;
Movable contactor, its rotation is to the position that contacts the position of described fixed contact or separate with described fixed contact to disconnect or closed described circuit, one end of described movable contactor is connected to described breech lock so that at the direction rotation identical with described breech lock, and described movable contactor has multiple contact surfaces of contact pivot point;
Spring, its one end is connected to described movable contactor, for contacting in the direction of described fixed contact as described movable contactor provides elastic force at described movable contactor in the time that closing of circuit operates, and in the direction of separating at described movable contactor and described fixed contact in the time of circuit opening operation for described movable contactor provides elastic force; And
Fixed axis, it is constructed to rotate with closure or disconnect described circuit and during described movable contactor does not contact with described fixed contact, provide pivot point by the outer surface that contacts described movable contactor at described movable contactor.
2. the switching mechanism for minitype plastic shell type circuit breaker according to claim 1, the described contact surface of wherein said movable contactor comprises multiple surfaces with different curvature radius.
3. the switching mechanism for minitype plastic shell type circuit breaker according to claim 1, it is adjacent with the part of described movable contactor of one end that is connected to described spring that wherein said fixed axis is positioned as, and
Wherein said movable contactor comprises:
First surface, its position at the described fixed contact of contact contacts described fixed axis; And
Second surface, it contacts described fixed axis in the position separating with described fixed contact.
4. the switching mechanism for minitype plastic shell type circuit breaker according to claim 3, the described first surface of wherein said movable contactor comprises inclined surface, and the described second surface of described movable contactor comprises curved surfaces.
5. the switching mechanism for minitype plastic shell type circuit breaker according to claim 3, the described first surface of wherein said movable contactor comprises first curved surfaces with predetermined first curvature radius, and the described second surface of described movable contactor comprises second curved surfaces with the radius of curvature that is less than described first curvature radius.
6. the switching mechanism for minitype plastic shell type circuit breaker according to claim 1, wherein said movable contactor comprises:
Supporting board; And
There is the contactor portion of contact.
7. the switching mechanism for minitype plastic shell type circuit breaker according to claim 6, wherein said supporting board is formed by iron, and described contactor portion is formed by copper.
8. the switching mechanism for minitype plastic shell type circuit breaker according to claim 6, wherein said supporting board and described contactor portion be integrated formation each other by being formed by the same material of iron or copper.
9. the switching mechanism for minitype plastic shell type circuit breaker according to claim 1, further comprises:
Movable contactor lid, it is connected to described breech lock by axle and described movable contactor, described contactor lid has for described fixed axis is inserted to axle accommodation hole wherein, and is constructed to rotate centered by described fixed axis in the direction identical with described breech lock; And
Trip(ping) bar, it can rotate and have a connection projection that is connected to described movable contactor lid.
10. the switching mechanism for minitype plastic shell type circuit breaker according to claim 9, further comprises tripping operation bowl cover, and described tripping operation bowl cover has:
Main part;
Cover slot portion, it is formed on described main part place, and the free end that is constructed to be suitable for the described connection projection of described trip(ping) bar is arranged on wherein;
Lid extension, it extends to contact the coupling part between described movable contactor, described movable contactor lid and described breech lock, to maintain the connection status between them from described main part.
11. switching mechanisms for minitype plastic shell type circuit breaker according to claim 10, the described lid extension of wherein said tripping operation bowl cover comprises bender element, to have the elastic force of the contact condition that maintains the coupling part between described movable contactor, described movable contactor lid and described breech lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910178869.4A CN102044384B (en) | 2009-10-09 | 2009-10-09 | Switching mechanism for minitype plastic shell type circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910178869.4A CN102044384B (en) | 2009-10-09 | 2009-10-09 | Switching mechanism for minitype plastic shell type circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102044384A CN102044384A (en) | 2011-05-04 |
| CN102044384B true CN102044384B (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910178869.4A Active CN102044384B (en) | 2009-10-09 | 2009-10-09 | Switching mechanism for minitype plastic shell type circuit breaker |
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| Country | Link |
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| CN (1) | CN102044384B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105590804B (en) * | 2014-11-04 | 2018-03-27 | 西门子公司 | The brake separating mechanism and its breaker of breaker |
| CN104733264A (en) * | 2015-03-16 | 2015-06-24 | 温州高能电气有限公司 | Miniature circuit breaker |
| WO2022000272A1 (en) * | 2020-06-30 | 2022-01-06 | 浙江沃斯托电气有限公司 | Circuit breaker |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0202546A2 (en) * | 1985-05-17 | 1986-11-26 | Licentia Patent-Verwaltungs-GmbH | Switching mechanism for a protective power circuit breaker |
| CN2607656Y (en) * | 2002-11-28 | 2004-03-24 | 正泰集团公司 | Operating mechanism for auxiliary electrical apparatus release of circuit breaker |
| CN1596455A (en) * | 2001-11-06 | 2005-03-16 | Abb服务有限公司 | Low-voltage circuit breaker |
| CN201015109Y (en) * | 2007-02-15 | 2008-01-30 | 黄华道 | Small circuit breaker |
-
2009
- 2009-10-09 CN CN200910178869.4A patent/CN102044384B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0202546A2 (en) * | 1985-05-17 | 1986-11-26 | Licentia Patent-Verwaltungs-GmbH | Switching mechanism for a protective power circuit breaker |
| CN1596455A (en) * | 2001-11-06 | 2005-03-16 | Abb服务有限公司 | Low-voltage circuit breaker |
| CN2607656Y (en) * | 2002-11-28 | 2004-03-24 | 正泰集团公司 | Operating mechanism for auxiliary electrical apparatus release of circuit breaker |
| CN201015109Y (en) * | 2007-02-15 | 2008-01-30 | 黄华道 | Small circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102044384A (en) | 2011-05-04 |
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