CN222462778U - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
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- CN222462778U CN222462778U CN202420911124.4U CN202420911124U CN222462778U CN 222462778 U CN222462778 U CN 222462778U CN 202420911124 U CN202420911124 U CN 202420911124U CN 222462778 U CN222462778 U CN 222462778U
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Abstract
断路器，包括至少一个断路器极，断路器极的内部设置有操作机构、触头机构和短路保护机构，操作机构包括触头支持，触头机构包括相互配合的动触头和静触头，动触头与触头支持连接，短路保护机构通过设置于断路器极内部的脱扣杠杆触发操作机构脱扣，断路器极的内部还设置有快速合闸件，快速合闸件与脱扣杠杆同轴转动装配于触头支持与短路保护机构之间，在合闸过程中，触头支持与快速合闸件先抵接限位再相对滑动直至分离，由触头支持带动动触头快速向合闸方向转动。本实用新型通过配置快速合闸件提升触头机构的合闸速度，保证使用寿命，同时，快速合闸件与脱扣杠杆同轴装配，避免因增设快速合闸件需要额外提供装配空间，提高了空间利用率。
A circuit breaker includes at least one circuit breaker pole, wherein an operating mechanism, a contact mechanism and a short-circuit protection mechanism are arranged inside the circuit breaker pole, wherein the operating mechanism includes a contact support, and the contact mechanism includes a movable contact and a static contact that cooperate with each other, wherein the movable contact is connected to the contact support, and the short-circuit protection mechanism triggers the operating mechanism to trip through a trip lever arranged inside the circuit breaker pole, and wherein a quick closing member is also arranged inside the circuit breaker pole, wherein the quick closing member and the trip lever are coaxially rotated and assembled between the contact support and the short-circuit protection mechanism, and during the closing process, the contact support and the quick closing member first abut against a limit and then slide relatively until they are separated, and the movable contact is driven by the contact support to rotate rapidly in the closing direction. The utility model improves the closing speed of the contact mechanism by configuring a quick closing member, thereby ensuring the service life, and at the same time, the quick closing member and the trip lever are coaxially assembled, thereby avoiding the need to provide additional assembly space due to the addition of a quick closing member, thereby improving the space utilization rate.
Description
Technical Field
The utility model relates to the field of piezoelectric devices, in particular to a circuit breaker.
Background
In the field of low-voltage power transmission and distribution, a circuit breaker is an important element playing roles of on-off control, protection and the like, in the switching-on process, the moving contact and the fixed contact are required to be closed by manually or driving an operating mechanism to move by a motor, but the switching-on speed is related to the position and the speed of the operating mechanism, in the existing product, if a quick switching-on device (an energy storage structure) is not arranged, the switching-on speed is slower, particularly in a multipolar product with poor synchronism, the duration of spark generated between the moving contact and the fixed contact in the switching-on process is longer, one pole is seriously ablated, and finally the phase-failure risk is caused, so that the service life is influenced.
Disclosure of Invention
The object of the present utility model is to overcome at least one of the drawbacks of the prior art and to provide a circuit breaker.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a circuit breaker, which comprises at least one circuit breaker pole, wherein an operating mechanism, a contact mechanism and a short-circuit protection mechanism are arranged in the circuit breaker pole, the operating mechanism comprises a contact support, the contact mechanism comprises a moving contact and a fixed contact which are mutually matched, the moving contact is connected with the contact support, the short-circuit protection mechanism triggers the operating mechanism to trip through a tripping lever arranged in the circuit breaker pole, a quick closing part is also arranged in the circuit breaker pole, the quick closing part and the tripping lever are coaxially and rotatably assembled between the contact support and the short-circuit protection mechanism,
In the switching-on process, the contact support is firstly abutted to limit and then slides relatively until being separated from the quick switching-on piece, and the contact support drives the moving contact to rotate in the switching-on direction quickly.
Further, the quick closing part and the tripping lever are of an integrated structure.
Further, the quick closing part comprises a locking part, the contact support is provided with a matching part, the matching part is abutted with the locking part in the process of supporting closing rotation of the contact, and the matching part and the locking part slide relatively;
The tripping lever and/or the quick closing piece are/is provided with an unlocking part, the tripping lever is provided with a triggering part, the short-circuit protection mechanism drives the tripping lever to rotate through the unlocking part during short circuit, and the tripping lever triggers the operating mechanism to trip through the triggering part.
Further, the quick closing member is also connected with a reset member for providing reset force for the quick closing member.
Further, the quick closing part comprises a first connecting plate, a connecting hole is formed in the middle of the first connecting plate, the edge of the connecting hole protrudes out of one side plate surface of the first connecting plate to form a connecting table, one side wall of the first connecting plate protrudes outwards to extend to form a crank arm serving as an unlocking part, an arc-shaped side wall of the other side of the first connecting plate serves as a locking part, the side wall of the first connecting plate, which is connected between the locking part and the unlocking part, is a straight side wall, and a positioning boss is arranged at the connection part of the locking part and the unlocking part.
Further, the trip lever comprises a second connecting plate, a connecting hole is formed in the middle of the second connecting plate, one side wall of the second connecting plate protrudes outwards to extend to form a crank arm serving as an unlocking part, and the other side wall of the second connecting plate protrudes outwards to extend to form a bent rod serving as a triggering part.
Further, the quick closing part and the tripping lever share a third connecting plate, a connecting hole is formed in the middle of the third connecting plate, the edge of the connecting hole protrudes out of one side plate surface of the third connecting plate to form a connecting table, one side wall of the third connecting plate protrudes outwards to extend to form a crank arm serving as an unlocking part, the other side wall of the third connecting plate is layered to form a first step surface and a second step surface, the first step surface extends outwards to form a bent rod serving as a triggering part, the arc-shaped side wall of the second step surface serves as a locking part, a straight side wall of the second step surface is connected between the locking part and the unlocking part, and a positioning boss is arranged at the connection part of the second step surface and the unlocking part.
Further, the short-circuit protection mechanism comprises a magnetic yoke, an armature tension spring and a conducting plate, wherein the conducting plate is arranged in the middle of the magnetic yoke, the first end of the armature is rotatably arranged, the second end of the armature is matched with the magnetic yoke relatively, the unlocking part is matched with the second end of the armature relatively, one end of the armature tension spring is connected with the armature, the other end of the armature tension spring is fixedly arranged, and an included angle between the axis of the armature tension spring and the axis of the armature is an acute angle.
Further, the circuit breaker pole further comprises a handle mechanism, the contact supports are rotatably arranged, the jump buckle and the lock catch are respectively rotatably arranged on the contact support, the jump buckle is in snap fit with the lock catch, the jump buckle is connected with the handle mechanism through a second connecting rod, and an energy storage part is arranged between the contact support and the moving contact.
Further, the energy storage piece is the torsional spring, one side that the contact supported is equipped with the mounting groove, moving contact and energy storage piece coaxial rotation assemble in the mounting groove, moving contact, contact support are provided with first location portion, second location portion respectively, two elasticity energy storage arms of energy storage piece respectively with first location portion, second location portion butt, the contact support be close to the marginal area and be equipped with protruding axle, one side of protruding axle is equipped with the arc linkage hole, and the contact support that is close to protruding axle has seted up the breach, one side marginal end portion that the protruding axle was kept away from to the breach forms the transition face of blunt circle, the transition face is as the cooperation portion.
Further, the circuit breaker pole still includes handle mechanism, operating device is including rotating the pivoted rotating plate of assembly, rotates respectively on the rotating plate and is equipped with contact support, jump knot and hasp, wherein jump knot and hasp snap fit, and the moving contact is connected on the contact support, is provided with the energy storage spring between contact support and rotating plate, be connected with the second connecting rod between handle mechanism and the jump knot, in the closing process the contact support with the mutual sliding process of quick closing part butt, the contact support rotates for the rotating plate and makes energy storage spring energy storage.
Further, still be provided with handle mechanism in the circuit breaker utmost point, handle mechanism includes operating piece and rotates the piece, be connected with first connecting rod between operating piece and the rotation piece, at least two circuit breaker utmost point linkage are connected, and the linkage is connected with the combined floodgate universal driving axle between the rotation piece of two adjacent circuit breaker utmost points, and the linkage is connected with the tripping universal driving axle between the operating mechanism of two adjacent circuit breaker utmost points.
According to the circuit breaker, the switching-on speed of the contact mechanism is improved by configuring the quick switching-on piece, the service life is guaranteed, meanwhile, the quick switching-on piece and the tripping lever are coaxially assembled, the additional provision of assembly space due to the fact that the quick switching-on piece is additionally arranged is avoided, and the space utilization rate is improved.
In addition, the quick closing part and the tripping lever can be of a split structure or an integrated structure, and the application range is wide.
In particular, the quick closing part and the tripping lever are of an integrated structure, and one element simultaneously has the functions of blocking the contact to support the quick closing and triggering the lock catch to realize the tripping of the operating mechanism during faults, and has the advantages of simplicity in assembly and low cost.
In addition, two adjacent breaker poles are respectively subjected to switching-on linkage and tripping linkage through a switching-on linkage shaft and a tripping linkage shaft, so that the action synchronicity of a plurality of breaker poles is improved.
Drawings
Fig. 1 is a schematic structural view of a multipole circuit breaker of the present utility model;
FIG. 2 is a schematic view of the internal structure of a breaker pole in the present utility model;
Fig. 3 is a schematic view (front view) of the internal structure of the breaker pole in the present utility model;
FIG. 4 is a schematic view (reverse side) of the internal structure of a circuit breaker pole of the present utility model;
FIG. 5 is a schematic view of the structure of the contact support of the present utility model;
FIG. 6 is a schematic view of a quick closing member according to the present utility model;
fig. 7 is a schematic structural view of a quick-closing member (third connector) according to the present utility model;
FIG. 8 is a schematic view of the structure of the rotary member of the present utility model;
Reference numerals:
The circuit breaker comprises a 1-circuit breaker pole, a 10-housing, a 101-operating end, a 102-plug end, a 11-closing linkage shaft, a 12-tripping linkage shaft, a 2-handle mechanism, a 21-operating piece, a 22-rotating piece, a 23-first connecting rod, a 24-second connecting rod, a 3-operating mechanism, a 31-contact support, a 311-matching part, a 312-protruding shaft, a 313-arc-shaped linkage hole, a 314-notch, a 32-trip buckle, a 33-lock buckle, a 34-tripping lever, a 35-quick closing piece, a 3 a-connecting hole, a 3 b-locking part, a 3 c-unlocking part, a 3 d-positioning boss, a 3 e-straight side wall, a 3 f-connecting table, a 3 g-triggering part, a 36-energy storage piece, a 37-resetting piece, a 41-moving contact, a 42-fixed contact, a 5-short circuit protection mechanism, a 6-overload protection mechanism, a 7-arc extinguishing system, an 81-connecting terminal and an 82-bus clip.
Detailed Description
Embodiments of the circuit breaker of the present utility model are further described below with reference to the examples shown in the drawings. The circuit breaker of the present utility model is not limited to the description of the following embodiments.
As shown in fig. 1 to 4, the circuit breaker includes at least one circuit breaker pole 1, a pair of line components and an operating mechanism 3 are provided in the interior of each circuit breaker pole 1, a contact mechanism is connected between the pair of line components, the contact mechanism includes a moving contact 41 and a fixed contact 42 which are mutually matched, the operating mechanism 3 is in driving connection with the moving contact 41, the operating mechanism 3 is in linkage connection with a handle mechanism 2 provided in the interior of the circuit breaker pole 1, an operating member 21 of the handle mechanism 2 extends to the exterior of the circuit breaker pole 1 for manually operating the circuit breaker pole 1 to perform opening and closing, of course, the operating mechanism 3 can also be in linkage connection with an electric operating mechanism provided in the interior of the circuit breaker pole 1, a motor of the electric operating mechanism (not shown) drives the circuit breaker pole 1 to perform opening and closing automatically according to a received control signal, one side of the contact mechanism is provided with an arc extinguishing mechanism 7, when the number of the circuit breaker poles 1 is two or more, two adjacent circuit breaker poles 1 are arranged, and the handle mechanisms 2 of two adjacent circuit breaker poles 1 are respectively connected in parallel by two linkage shafts.
The circuit breaker pole 1 is internally provided with a short-circuit protection mechanism 5 and an overload protection mechanism 6, the short-circuit protection mechanism 5 is connected between one wiring assembly and the contact mechanism, a tripping lever 34 is rotatably arranged between the short-circuit protection mechanism 5 and the operating mechanism 3, when a short-circuit fault occurs, the short-circuit protection mechanism 5 drives the tripping lever 34 to trigger the operating mechanism 3 to trip, so that short-circuit protection is realized, the overload protection mechanism 6 is connected between one wiring assembly and the contact mechanism, and when an overload fault occurs, the overload protection mechanism 6 drives the operating mechanism 3 to trip, so that overload protection is realized.
Specifically, as shown in fig. 2-4 and 8, the operating mechanism 3 comprises a contact support 31 assembled in a rotating way, the moving contact 41 is connected with the contact support 31, for example, the moving contact 41 and the contact support 31 are assembled in a coaxial rotating way, an energy storage part 36 is arranged between the moving contact 41 and the contact support 31, or the moving contact 41 is connected to the contact support 31, the moving contact 41 is directly driven by the contact support 31, the operating mechanism 3 further comprises a trip 32 and a lock catch 33, wherein the trip 32 and the lock catch 33 are assembled in a rotating way respectively, one end of the trip 32 is in a snap fit with one end of the lock catch 33, the trip lever 34 and the overload protection mechanism 6 are respectively matched with the lock catch 33, the lock catch 33 is driven to rotate, the lock catch 33 and the trip 32 are released to enable the operating mechanism 3 to be separated from the moving contact 41 and the fixed contact 42, so that the tripping and the power off can be realized, the handle mechanism 2 comprises an operating member 21 and a rotating member 22, wherein the operating member 21 is assembled in an operating hole of the circuit breaker pole 1, one end of the operating member 21 extends out of the circuit breaker pole 1, the rotating member 22 is rotatably arranged in the circuit breaker pole 1 between the operating mechanism 3 and the operating member 33, one end of the rotating member 21 is connected with the first support 22 and the connecting rod 23, and the rotating member 24 is connected with the rotating mechanism 22.
The improvement point of the application is that a quick closing member 35 is further arranged in each breaker pole 1, the quick closing member 35 and the tripping lever 34 are coaxially assembled between the contact support 31 and the short-circuit protection mechanism 5 in a rotating manner, in the closing process, the contact support 31 and the quick closing member 35 are firstly abutted and limited and then relatively slide until being separated, and the contact support 31 drives the moving contact 41 to rapidly rotate towards the closing direction.
Therefore, the switching-on speed of the contact mechanism is improved by configuring the quick switching-on piece 35, the service life is guaranteed, meanwhile, the quick switching-on piece 35 and the tripping lever 34 are coaxially assembled, the additional assembly space is prevented from being provided due to the fact that the quick switching-on piece 35 is additionally arranged, and the space utilization rate is improved.
Specifically, the quick closing member 35 includes a locking portion 3b and an unlocking portion 3c, the contact support 31 is provided with a mating portion 311, during the process that the contact support 31 drives the moving contact 41 to rotate in the closing direction, the mating portion 311 abuts against the locking portion 3b, it can also be understood that the rotating force received by the mating portion 311 is smaller than the friction force between the mating portion 311 and the locking portion 3b, so that the contact support 31 abuts against the quick closing member 35 first, when a larger operating force is applied to the operating member 21, the rotating force received by the mating portion 311 is greater than the friction force between the mating portion 311 and the locking portion 3b, the mating portion 311 and the locking portion 3b slide relatively until separated from each other, the trip lever 34 coaxially assembled is provided with a triggering portion 3g and a unlocking portion 3c, wherein the respective unlocking portions 3c of the quick closing member 35 and the trip lever 34 are both engaged with the short-circuit protection mechanism 5, and the triggering portion 3g is used for pushing the latch 33 to rotate toward the operating mechanism 3.
Further, the quick closing member 35 and the trip lever 34 are of an integral structure, that is, the quick closing member 35 is further provided with a trigger part 3g for triggering the tripping of the operating mechanism 3 on the basis of being provided with the locking part 3b and the unlocking part 3c, the trigger part 3g drives the lock catch 33 of the operating mechanism 3 to rotate, the quick closing member 35 and the trip lever 34 are of an integral structure, and one element simultaneously realizes two functions of quick closing and triggering the lock catch 33 to realize the tripping of the operating mechanism when in failure, so that the quick closing member has the advantages of simple assembly and low cost.
An embodiment of a circuit breaker is provided in connection with fig. 1-8, the circuit breaker being exemplified as a plug-in circuit breaker.
As shown in fig. 1, the circuit breaker includes a plurality of circuit breaker poles 1 arranged in parallel, each circuit breaker pole 1 includes a housing 10, opposite ends of the housing 10 are respectively used as an operation end 101 and a plug end 102, the operation end 101 is provided with a wiring hole and an operation hole, the plug end 102 is provided with a socket, a pair of wiring components arranged in the housing 10 are respectively a wiring terminal 81 and a bus clip 82, wherein the wiring terminal 81 is correspondingly arranged at the operation end 101, the wiring terminal 81 corresponds to the wiring hole and is used for wiring, the bus clip 82 is arranged at the plug end 102 and is matched with the socket, and the bus clip 82 is connected with an external lead in a clamping manner through the plug circuit breaker.
The operation mechanism 3, the contact mechanism and the arc extinguishing mechanism 7 are sequentially arranged between the wiring terminal 81 and the bus bar clamp 82, the contact mechanism is electrically connected between the bus bar clamp 82 and the wiring terminal 81, one side of the operation mechanism 3 is provided with the overload protection mechanism 6, when overload faults occur, the overload protection mechanism 6 triggers the operation mechanism 3 to trip, the arc extinguishing mechanism 7 and the short-circuit protection mechanism 5 arranged in the shell 10 are arranged side by side, in fig. 2-4, the overload protection mechanism 6 and the short-circuit protection mechanism 5 are respectively arranged on two opposite sides of the shell 10, the tripping lever 34 is rotatably assembled between the short-circuit protection mechanism 5 and the operation mechanism 3, when short-circuit faults occur, the short-circuit protection mechanism 5 triggers the tripping lever 34 to rotate, the tripping lever 34 triggers the lock catch 33 of the operation mechanism 3 to rotate so as to release the snap fit with the jump button 32, and the short-circuit protection mechanism 5 triggers the operation mechanism 3 to trip through the tripping lever 34.
2-5, The operating mechanism 3 comprises a contact support 31 assembled in a rotating way, a jump buckle 32 and a lock buckle 33 are respectively installed on the contact support 31 in a rotating way, the jump buckle 32 is in snap fit with the lock buckle 33, the jump buckle 32 is connected with the handle mechanism 2 through a second connecting rod 24, the contact mechanism comprises a moving contact 41 and a fixed contact 42 which are matched with each other, the moving contact 41 is assembled in a coaxial rotating way with the contact support 31, the fixed contact 42 is fixedly arranged in a shell 10, the fixed contact 42 and the overload protection mechanism 6 are positioned on the same side in the shell 10, one end of the moving contact 41 is in driving fit with the contact support 31, an energy storage piece 36, preferably a torsion spring, is arranged between the moving contact 41 and the contact support 31, and two elastic energy storage arms of the energy storage piece 36 are respectively abutted with the moving contact 41 and the contact support 31; the other end of the moving contact 41 is matched with a fixed contact 42 fixedly arranged in the shell 10, the contact support 31 is connected with a handle mechanism 2, the handle mechanism 2 corresponds to an operation end 101, an operation piece 21 of the handle mechanism 2 correspondingly extends out of an operation hole and is used for manually driving the contact support 31 to drive the moving contact 41 to perform opening and closing actions, of course, the contact support 31 can also be connected with an electric operation mechanism in a linkage manner, a motor of the electric operation mechanism can drive the contact support 31 to perform opening and closing rotation after receiving a control signal, one side of the contact support 31 opposite to the energy storage element 36 is also rotationally provided with a jump button 32 and a lock catch 33, the jump button 32 is in snap fit with one end of the lock catch 33, the overload protection mechanism 6 and the tripping lever 34 are respectively matched with the lock catch 33, and the jump button 32 and the lock catch 33 are rotationally driven to break the snap fit of the lock catch 33.
In the switching-on process, when the contact support 31 is firstly abutted and limited with the quick switching-on piece 35 in the switching-on rotation process, and larger operation force is applied, so that the rotation force applied to the contact support 31 is larger than the friction force between the contact support 31 and the quick switching-on piece 35, the contact support 31 and the quick switching-on piece 35 slide mutually until being separated, in the process, the moving contact 41 moves synchronously along with the contact support 31, the two are relatively static, the energy storage piece 36 does not store energy, and the moving contact 41 is driven to rotate in the switching-on direction quickly by the driving contact support 31 with increased operation force, so that the switching-on speed of the contact mechanism is improved. The embodiment does not need spring energy storage, the blocking limit of the quick closing member 35 to the contact support 31 is used for increasing the operation force, the blocking force suddenly disappears when the contact support 31 is separated from the quick closing member 35, quick closing is realized, the existing structure is not required to be changed, additional elements are added, and the structure is simple and the cost is low.
Another embodiment of the operating mechanism 3 is provided. The operating mechanism 3 comprises a rotating plate (not shown) which is assembled in a rotating way, a contact support 31, a trip button 32 and a lock catch 33 are assembled on the rotating plate in a rotating way respectively, wherein the trip button 32 is in snap fit with the lock catch 33, a moving contact 41 is connected to the contact support 31, an energy storage spring is arranged between the contact support 31 and the rotating plate, a second connecting rod 24 is connected to the handle mechanism 2 and the trip button 32, one end of the second connecting rod 24 penetrates through the trip button 32 to be connected with the rotating plate, the handle mechanism 2 corresponds to the operating end 101, the operating piece 21 of the handle mechanism 2 correspondingly extends out of the operating hole and is used for manually driving the contact support 31 to drive the moving contact 41 to perform opening and closing actions.
In the closing process, when the contact support 31 is firstly abutted against the quick closing member 35 in the closing rotation process, that is, the rotation force applied by the rotation plate to the contact support 31 is smaller than the friction force between the contact support 41 and the quick closing member 35, at this time, the contact support 31 rotates relative to the rotation plate to enable the energy storage spring to store energy, when larger operation force is applied, the rotation force applied by the rotation plate to the contact support 31 is larger than the friction force between the contact support 31 and the quick closing member 35, the contact support 31 and the quick closing member 35 slide mutually until being separated, the energy storage spring releases energy after the contact support 31 is separated from the quick closing member 35, so that the contact support 31 is driven by the resultant force of the operation force and the release capacity of the energy storage spring to drive the movable contact 41 to rotate in the closing direction quickly, and the closing speed of the contact mechanism is improved.
Preferably, in the above-mentioned operating mechanism 3, the contact support 31 is further provided with a return spring, which may be a tension spring, connected between the contact support housing 10 and the contact support 31 for providing a return force to the contact support 31.
In the above-mentioned operating mechanism 3, the operating member 21 is a button assembled in a sliding manner, and the contact mechanism can be driven to close or open by pressing or pulling the operating member 21, and as other embodiments, the operating member 21 may be a handle assembled in a rotating manner, one end of the handle extends out of the operating hole, and the rotating handle drives the rotating member 22 to drive the contact mechanism to close or open, or the rotating member 22 is close to the operating end, and the rotating member 22 is fixedly connected with a protruding operating member 21 in a radial direction, and drives the rotating member 22 to rotate through the operating member 21.
In the above-mentioned operating mechanism 3, the contact support 31 is further provided with a mating portion 311, a quick closing member 35 is further provided between the operating mechanism 3 and the short-circuit protection mechanism 5, the quick closing member 35 is provided with a locking portion 3b and an unlocking portion 3c, the locking portion 3b and the unlocking portion 3c are respectively mated with the mating portion 311 and the short-circuit protection mechanism 5, when the manually or electrically operated contact support 31 performs a closing rotation, the contact support 31 drives the moving contact 41 to rotate together in the closing direction, when the locking portion 3b of the quick closing member 35 is abutted against the mating portion 311 of the contact support 31, and when the locking portion 3b is kept abutted against the mating portion 311 (corresponding to the rotational force received by the mating portion 311 being smaller than the frictional force between the locking portion 3b and the mating portion 311), when a larger operating force is applied, the contact support 31 continues to rotate in the closing direction relative to the moving contact 41, and a relative sliding occurs between the mating portion 311 and the locking portion 3b (corresponding to the frictional force received by the mating portion 311 being greater than the locking portion 3 b), and the quick closing support 41 is driven by the contact support 31 to rotate in the closing direction, and when the locking portion 3b is kept abutted against the mating portion 311 is in the opening direction (corresponding to the rotational force received by the locking portion 311).
A structure of a contact support 31 applied to the above-described operating mechanism 3 is provided in connection with fig. 2 to 5.
As shown in fig. 5, the contact support 31 includes a body, the body has a plate-like structure with a certain thickness, the middle of the body is provided with an assembly hole penetrating through two side plates, the edge of the assembly hole protrudes out of one side plate of the body along the axial direction to form a connecting shaft, one side surface of the body is provided with an annular bulge surrounding the outer side of the connecting shaft, an installation groove surrounding the outer side of the connecting shaft is formed between the connecting shafts by the annular bulge, the movable contact 41 and the energy storage member 36 are coaxially assembled in the installation groove and rotate around the connecting shaft, the edge area of the body is provided with a second positioning part, the second positioning part and the installation groove are positioned on the same side plate of the body, the second positioning part has a bulge structure, one end of the movable contact 41 extends to one side of the second positioning part, a first positioning part opposite to the second positioning part is arranged on the movable contact 41, and two elastic energy storage arms of the energy storage member 36 are respectively in mutual butt joint with the first positioning part and the second positioning part.
The other side face of the body is provided with a protruding shaft 312, in fig. 5, the protruding shaft 312 is located at a position close to the edge of the body, one side of the protruding shaft 312 is provided with an arc-shaped linkage hole 313, the second connecting rod 24 in the handle mechanism 2 drives the contact support 31 to rotate through the arc-shaped linkage hole 313, the trip 32 is rotatably arranged on the protruding shaft 312, the lock catch 33 and the contact support 31 are coaxially assembled in a rotating mode, the trip 32 and the lock catch 33 are located at one side of the contact support 31 opposite to the movable contact 41, the trip 32 is in snap fit with one end of the lock catch 33, the other end of the lock catch 33 is provided with a tripping part, and the tripping part is used for being matched with the overload protection mechanism 6 and the triggering part 3g of the tripping lever 34.
A notch 314 is formed at one side edge of the body, the notch 314 is located at one side of the protruding shaft 312, the notch 314 is V-shaped in fig. 5, a rounded transition surface is formed at one side edge end of the notch 314 away from the protruding shaft 312, and the transition surface is used as the matching portion 311 to be abutted against the locking portion 3 b. In combination with fig. 2-4 and 6, a structure of a quick closing member 35 applied to the above operating mechanism 3 is provided, the quick closing member 35 and the trip lever 34 are in a split structure, as shown in fig. 6, the quick closing member 35 includes a first connecting plate, a connecting hole 3a is provided in the middle of the first connecting plate, an edge of the connecting hole 3a protrudes out of a side plate surface of the first connecting plate to form a connecting table 3f, the connecting table 3f is in a ring shape in fig. 6, a side wall of one side of the first connecting plate protrudes outwards to form a crank arm serving as an unlocking part 3c, an arc-shaped side wall of the other side of the first connecting plate serves as a locking part 3b, the locking part 3b has a certain radian, a side wall of the first connecting plate connected between the locking part 3b and the unlocking part 3c is a section of straight side wall 3e, so that the first connecting plate is in contact with the matching part 311 is guaranteed, and the locking part 3b and the matching part 311 is conveniently separated, a positioning boss 3d is provided at a joint of the locking part 3b and the unlocking part 3c, one side of the positioning boss 3d is provided with a clamping groove, and the positioning boss 3d is located on one side of the same side of the connecting plate 3 f.
As shown in fig. 4, the trip lever 34 includes a second connection plate, a connection hole 3a is formed in the middle of the second connection plate, a side wall of one side of the second connection plate protrudes outwards and extends to form a crank arm serving as an unlocking portion 3c, the unlocking portion 3c of the trip lever 34 is identical to the unlocking portion 3c of the quick closing member 35 in shape, a side wall of the other side of the second connection plate protrudes outwards and extends to form a bent rod serving as a triggering portion 3g, the triggering portion 3g is opposite to the lock catch 33 of the operating mechanism 3, in this embodiment, the trip lever 34 and the quick closing member 35 are coaxially assembled between the short-circuit protection mechanism 5 and the operating mechanism 3 through respective connection holes 3a, the trip lever 34 and the unlocking portion 3c of the quick closing member 35 cooperate together with the short-circuit protection mechanism 5, and the unlocking portion 3c can be in contact with an armature of the short-circuit protection mechanism 5 or leave a small gap.
Further, the split quick closing member 35 and the trip lever 34 may be connected in a linkage manner, for example, a linkage structure is provided between the trip lever 34 and the quick closing member 35, the linkage structure may be a slot and a plug portion that are plugged into each other, and at this time, the unlocking portion 3c may be provided with only one of them, that is, the quick closing member 35 or the trip lever 34 is provided with the unlocking portion 3c.
In connection with fig. 2-4 and 7, another structure of the quick closing member 35 corresponding to the above-mentioned operating mechanism 3 is provided, as shown in fig. 7, the quick closing member 35 and the trip lever 34 are in an integrated structure, that is, the quick closing member 35 and the trip lever 34 share a third connecting plate, a connecting hole 3a is formed in the middle of the third connecting plate, the connecting hole 3a can be rotatably assembled between the short-circuit protection mechanism 5 and the operating mechanism 3, the edge of the connecting hole 3a protrudes out of one side plate surface of the third connecting plate to form a connecting table 3f, the connecting table 3f is preferably an annular boss, one side wall of the third connecting plate protrudes outwards to form a turning arm serving as an unlocking part 3c, the other side wall of the third connecting plate is layered to form a first step surface and a second step surface, the curved rod serving as a triggering part 3g is outwards formed by the first step surface, a section of side wall 3e of the second step surface is used as a locking part 3b, a section of side wall 3e of the second step surface is engaged between the locking part 3b and the unlocking part 3c, a joint position 3d is arranged at the joint of the second step surface and the unlocking part 3c, and the same positioning boss 3d is located on one side of the connecting plate 3 d.
In this embodiment, as shown in fig. 3, the quick closing member 35 is further connected with a reset member 37, preferably, the reset member 37 is a torsion spring, the reset member 37 includes a twisting portion, two ends of the twisting portion extend outwards to form two elastic arms respectively, the twisting portion and the quick closing member 35 are coaxially assembled in a rotating manner, that is, the twisting portion is sleeved on the connecting table 3f, one of the elastic arms is clamped into a clamping groove of the positioning boss 3d, the other elastic arm is abutted in the housing 10, and the reset member 37 is deformed to provide a reset force for the quick closing member 35.
Preferably, a positioning structure is provided on the housing 10, the trip lever 34 and the quick closing member 35 are coaxially assembled on the positioning structure in a rotating manner, and the positioning structure can limit the moving track of the trip lever 34 and the quick closing member 35, and the positioning structure can be a protruding shaft structure.
In combination with fig. 4, a short-circuit protection mechanism 5 is provided, where the short-circuit protection mechanism 5 of this embodiment adopts a clapping type short-circuit protection mechanism 5, the short-circuit protection mechanism 5 includes a magnetic yoke, an armature tension spring and a conductive plate, the conductive plate is disposed in the middle of the magnetic yoke, a first end of the armature is rotatably disposed, a second end of the armature is relatively matched with the magnetic yoke, an unlocking portion 3c is matched with the second end of the armature, that is, when the quick closing member 35 and the trip lever 34 are in a split structure, the quick closing member 35 and the unlocking portion 3c of the trip lever 34 are both matched with the second end of the armature, when the quick closing member 35 and the trip lever 34 are in an integrated structure, the unlocking portion 3c is matched with the second end of the armature, one end of the tension spring is connected with the armature, and the other end of the tension spring is fixedly disposed, and an included angle between an axis of the armature tension spring and an axis of the armature is an acute angle. Of course, as other embodiments, the short-circuit protection mechanism 5 may be an electromagnetic trip device.
Further, the included angle between the axis of the armature tension spring and the axis of the armature is an acute angle, so that the tensile amplification (or the tensile amplification) of the armature tension spring is small in the attraction process of the armature and the magnetic yoke, the quick attraction of the armature and the magnetic yoke is facilitated, and the breaking capacity of the miniature circuit breaker can be improved.
The overload protection mechanism 6 applied to the present embodiment is provided in conjunction with fig. 2-4, where the overload protection mechanism 6 includes a first conductive plate, a first connection plate and a bimetal, two ends of the first connection plate are respectively connected with the first conductive plate and the bimetal, the bimetal is connected with the first conductive plate through a first flexible connection and is connected with the fixed contact 42 through a second flexible connection, a third flexible connection is optionally provided between the first conductive plate and the fixed contact 42, when the overload protection mechanism 6 is used in a small current specification (63A and below), the third flexible connection is not provided between the first conductive plate and the fixed contact 42, so as to meet the heating requirement of the bimetal, and when the overload protection mechanism 6 is used in a large current specification (63A and above), the first conductive plate and the fixed contact 42 are connected through the third flexible connection, thereby not only ensuring the heating requirement of the bimetal, but also ensuring the shutoff section requirement of the flexible connection.
One end of the first connecting plate is connected with the middle part of the first conducting plate, the other end of the first connecting plate is connected with one end of the bimetallic strip, the other end of the bimetallic strip is matched with the tripping part of the lock catch 33, an adjusting screw is connected to the first connecting plate in a threaded manner, one end of the adjusting screw is matched with the first connecting plate relatively, and the adjusting screw is arranged on the first conducting plate.
It should be noted that the first connecting plate is generally made of standard materials such as brass and carbon steel, has large internal resistance and longer length, has certain elasticity, can well bear the acting force given by the adjusting screw, thereby adjusting the position of the bimetallic strip to adjust the overload characteristic of the circuit breaker, and the first flexible connection, the second flexible connection and the third flexible connection are made of good conductors, have the characteristics of short length, large section and small internal resistance, form three current channels and bear most of current.
In this embodiment, the wiring assembly, the rest of the structure of the operating mechanism 3 except the contact support 31, the contact mechanism, the arc extinguishing mechanism 7, the overload protection mechanism 6 and the short-circuit protection mechanism 5 in each circuit breaker pole 1 may be all of the prior art, and an electrical operating mechanism may be configured in one of the circuit breaker poles 1, or an electrical operating mechanism may be separately configured to drive the contact 41 mechanism to automatically switch on or off.
In this embodiment, two adjacent breaker poles 1 are connected in a linkage manner, specifically, the operation members 21 of the two adjacent breaker poles 1 are connected in a linkage manner outside the casing 10, the closing linkage shaft 11 is connected between the rotation members 22 of the two adjacent breaker poles 1 in a linkage manner, the tripping linkage shaft 12 is connected between the operation mechanisms 3 of the two adjacent breaker poles 1 in a linkage manner, that is, the two latches 33 are linked by the tripping linkage shaft 12, and correspondingly, the casing 10 of the breaker pole 1 is provided with holes for the closing linkage shaft 11 and the tripping linkage shaft 12 to pass through.
It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.
The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.
Claims (12)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420911124.4U CN222462778U (en) | 2024-04-29 | 2024-04-29 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420911124.4U CN222462778U (en) | 2024-04-29 | 2024-04-29 | Circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222462778U true CN222462778U (en) | 2025-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420911124.4U Active CN222462778U (en) | 2024-04-29 | 2024-04-29 | Circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222462778U (en) |
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2024
- 2024-04-29 CN CN202420911124.4U patent/CN222462778U/en active Active
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