CN217444318U - Operating mechanism and circuit breaker - Google Patents

Abstract

An operating mechanism and a circuit breaker are assembled, the circuit breaker is provided with the operating mechanism, the operating mechanism comprises a support, a rocker arm, a jump buckle, a connecting rod assembly and a main spring, the rocker arm, the jump buckle, the connecting rod assembly and the main spring are respectively and rotatably assembled on the support, the first end of the connecting rod assembly is rotatably connected with the jump buckle, and two ends of the main spring are respectively connected with the rocker arm and the connecting rod assembly; the limiting assembly is rotatably connected with the second end of the connecting rod assembly, and when the limiting assembly rotates, the second end of the connecting rod assembly is driven to move along a preset track. The utility model discloses an operating device and circuit breaker, through setting up with the spacing subassembly of the spacing complex of support or electrically conductive system, make operating device can keep closing a floodgate, separating brake, detain again and the dropout state, be applicable to the modular development of circuit breaker.

Description

Operating device and circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus field, concretely relates to operating device and circuit breaker.

Background

The operating mechanism is used as a core component of the low-voltage molded case circuit breaker and is an important index for determining the performance of the whole circuit breaker. The control of opening and closing the contact can be realized through the operating mechanism, and the purpose of reliably closing and opening the circuit is achieved. In the traditional molded case circuit breaker, the switching-on and switching-off and tripping operations can be completed only by the operating mechanism needing to be matched with the rotating shaft and the moving contact of the circuit breaker, the modularity degree of the operating mechanism is low, and after the operating mechanism is separated from the rotating shaft and the moving contact, the switching-on and switching-off and tripping actions can not be completed independently no matter the operating mechanism is or the rotating shaft and the moving contact are separated, so that the circuit breaker can not adapt to the modular development of the circuit breaker; in addition, when the operating mechanism is matched with the rotating shaft of the circuit breaker, the bracket of the operating mechanism has larger impact force on the connecting piece connected between the operating mechanism and the rotating shaft, so that the fatigue life of the operating mechanism is shortened, the reliability of the operating mechanism is reduced, and the performance of the circuit breaker is further influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a circuit breaker, it possesses the higher operating device of modularization degree and reliability.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an operating mechanism comprises a support, a rocker arm, a jump buckle, a connecting rod assembly and a main spring, wherein the rocker arm, the jump buckle, the connecting rod assembly and the main spring are respectively and rotatably assembled on the support; the limiting assembly is rotatably connected with the second end of the connecting rod assembly, and when the limiting assembly rotates, the second end of the connecting rod assembly is driven to move along a preset track.

Further, the limiting assembly is matched with a conductive system of the bracket or the breaker, and when the limiting assembly is driven by the movement of the connecting rod assembly to be released from limiting matching with the conductive system of the bracket or the breaker, the operating mechanism is kept in a closing state; alternatively, the operating mechanism remains in the tripped or disengaged state when movement of the linkage assembly drives the limit assembly into a limit engagement with the cradle or the conductive system of the circuit breaker.

Furthermore, the limiting assembly comprises a connecting piece and a second limiting shaft, the first end of the connecting piece is rotatably assembled with the support, the second end of the connecting piece is rotatably connected with the connecting rod assembly through the second limiting shaft, and the first linkage shaft is in limiting fit with the support.

Furthermore, the limiting assembly is in limiting fit with the support and comprises a connecting piece, a first linkage shaft and a second limiting shaft, the first end of the connecting piece is rotatably assembled with the support, the first linkage shaft is connected to the second end of the connecting piece and used for driving the moving contact, and the third end of the connecting piece is rotatably connected with the connecting rod assembly through the second limiting shaft;

the second limiting shaft is in limiting fit with the bracket, and/or the first linkage shaft is in limiting fit with a conductive system of the circuit breaker.

Furthermore, the connecting piece is triangular, a first end angle of the connecting piece is connected with the bracket, and the first linkage shaft and the second limiting shaft are respectively connected to the other two end angles of the connecting piece.

Further, the support is arranged between the limiting assembly and the connecting rod assembly, and the limiting assembly and the connecting rod assembly are connected through a second limiting shaft and are in limiting fit with the support.

Furthermore, link assembly includes first connecting rod, second connecting rod and fourth connecting axle, first connecting rod passes through the fourth connecting axle with the one end of second connecting rod and rotates to be connected, and the one end of main spring is connected in the fourth connecting axle, and the other end of first connecting rod rotates with the middle part of jumping the knot and is connected formation jump knot and link assembly's rotation tie point, and the other end and the spacing hub connection of second connecting rod still are connected with first spacing axle on first connecting rod, by first spacing axle with jump the spacing first connecting rod of knot cooperation during the combined floodgate.

Furthermore, the operating mechanism also comprises a lock catch and a re-buckle, the jump buckle is in hasp fit with the lock catch, and the lock catch is in limit fit with the re-buckle;

in the switching-on process, the jump buckle is matched with the lock buckle hasp, the central axis of the rocker arm drives the main spring to cross a rotating connection point of the jump buckle and the connecting rod assembly, the main spring drives the first connecting rod to rotate and drives the connecting piece to rotate through the second connecting rod, when the first connecting rod is limited by the jump buckle, the first connecting rod and the second connecting rod are in a straight state, and the second limiting shaft is separated from the support.

Further, at the separating brake in-process, the central axis by the rocking arm drive main spring crosses jump buckle and link assembly's rotation tie point, and the first link of main spring drive rotates and drives the connecting piece through the second connecting rod and rotate, makes spacing axle of second support lean on the cooperation.

Further, detain the in-process again, the rocking arm promotes to jump and detains the rotation, and the central axis of main spring crosses behind the rotation tie point of jumping knot and link assembly drive first link and rotates and drive the connecting piece and rotate, and spacing axle of second supports and supports to lean on the cooperation, is detained again after the rocking arm is restricted and is detained spacing cooperation once more with the hasp, hasp cooperation once more with jumping the knot.

Furthermore, in the tripping process, the secondary buckle is driven to rotate to remove the limit fit with the buckle, the buckle is separated from the jump buckle under the drive of the main spring, the jump buckle rotates and drives the connecting piece to rotate through the connecting rod assembly, after the central axis of the main spring crosses the rotating connection point of the jump buckle and the connecting rod assembly, the first connecting rod is jumped and buckled to be limited, and the second limit shaft and the support are abutted to be limited.

A circuit breaker comprises a shell, wherein the operating mechanism and at least one conductive system are assembled in the shell, the conductive system comprises a shell and a contact mechanism arranged in the shell, and a limiting component of the operating mechanism comprises a first universal driving shaft used for driving a moving contact of the contact mechanism.

Furthermore, the contact mechanism comprises a rotating shaft, a contact support, a contact spring, a moving contact and a static contact, the rotating shaft and the contact support are in running fit with the shell, the rotating shaft is in driving connection with the first linkage shaft, the moving contact is connected to the contact support and is connected with the rotating shaft through the contact spring, and the static contact is fixed in the shell and is opposite to the moving contact.

Furthermore, a limiting structure is arranged between the rotating shaft and the shell or between the moving contact and the shell, and the moving contact is kept in an opening or closing state by the limiting structure.

The utility model discloses an operating device through setting up with the spacing subassembly of the spacing complex of support or electrically conductive system, makes operating device can keep closing a floodgate, separating brake, detain again and the dropout state, is applicable to the modular development of circuit breaker.

Preferably, the limiting assembly is in limiting fit with the support, so that the operating mechanism forms an independent modular structure, and can be stably kept in a closing state, a breaking state, a re-buckling state and a tripping state under the condition of not keeping balance according to the contact of the moving contact and the static contact.

Preferably, the short second limiting shaft is matched with the support for limiting, and the good rigidity of the second limiting shaft is utilized, so that the direct impact of the support on the first linkage shaft is avoided, the fatigue life of the mechanism is prolonged, and the reliability of the operating mechanism is improved.

The utility model discloses a circuit breaker, through assembly modular operating device, possess the assembly facility and satisfy circuit breaker modular development trend.

In addition, the moving contact and the shell, the rotating shaft and the shell of the circuit breaker can be further provided with a limiting structure, the moving contact is kept in a closing state or an opening state through the limiting structure, the modularization degree of the circuit breaker is further improved, and meanwhile, the moving contact is kept in the opening state or the closing state, and the assembly of a modularized operating mechanism is facilitated.

Drawings

Fig. 1 is a schematic structural diagram of an operating mechanism in a closing state;

FIG. 2 is a schematic view of the operating mechanism in a retightened condition;

FIG. 3 is a schematic view of the operating mechanism in a tripped state;

FIG. 4 is a side view of FIG. 3;

fig. 5 is a schematic structural diagram of the circuit breaker in a closing state;

fig. 6 is a schematic diagram of the circuit breaker in a re-tripped state;

fig. 7 is a schematic diagram of the circuit breaker in a tripped state.

Detailed Description

The following describes a specific embodiment of an operating mechanism and a circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 7. The present invention is not limited to the description of the following embodiments.

The utility model provides an operating mechanism, includes support 11 and rotates rocking arm 12, jump and detain 14, hasp 15, detain 16 again of assembly on support 11 respectively, jump and detain 14 and 15 snap-fit of hasp, hasp 15 with detain 16 spacing cooperations again, the first end of link assembly is connected with jumping and detains 14 rotation, the both ends of main spring 13 are connected with rocking arm 12 and link assembly respectively, still include spacing subassembly, spacing subassembly rotates with support 11 to be connected and forms the pivot, works as when spacing subassembly rotates, drives link assembly's second end and removes along predetermineeing the orbit.

The limiting assembly is matched with the bracket 11 or a conductive system of the circuit breaker, and when the movement of the connecting rod assembly drives the limiting assembly to be free from limiting matching with the bracket 11 or the conductive system of the circuit breaker, the operating mechanism 1 is kept in a closing state; when the movement of the connecting rod assembly drives the limit assembly to be in limit fit with the bracket 11 or a conductive system of the circuit breaker, the operating mechanism 1 is kept in a switching-off, re-buckling or tripping state, and when the switching-on, switching-off, re-buckling and tripping state are carried out, the rotation angle of the tripping buckle 14 is in a controllable range.

Preferably, spacing subassembly and the 11 cooperations of support make operating device 1 can independently accomplish combined floodgate, separating brake, detain again and the dropout action, and its cooperation process is:

during closing, the movement of the connecting rod assembly drives the limiting assembly to move to release limiting matching with the support 11, the movement of the limiting assembly can be used for driving the moving contact 33 to swing to achieve closing, the trip buckle 14 limits the movement of the connecting rod assembly, in the closing state, the connecting rod assembly keeps a balanced straight state under the matching of the trip buckle 14, the limiting assembly and the support 11 release limiting matching, and the connecting rod assembly keeps balance through the limiting of the trip buckle 14, so that the operating mechanism 1 can keep a balanced and stable closing state when the moving contact 33 is not required to be connected;

preferably, during brake opening or re-buckling, the connecting rod assembly moves towards the direction away from the jump buckle 14, the movement of the connecting rod assembly drives the limit assembly to be in limit fit with the bracket 11, so that in the brake opening state or the re-buckling state, the limit assembly is in limit fit with the bracket 11, the connecting rod assembly keeps in a balance state under the cooperation of the jump buckle 14, the limit assembly and the main spring 13, and the operating mechanism 1 keeps in the balance state;

preferably, when tripping is performed, the limit fit between the latch 15 and the rebutch 16 is released, the jump buckle 14 is separated from the latch 15, the movement of the connecting rod assembly drives the limit assembly to be in limit fit with the bracket 11, so that in a tripping state, the limit assembly is in limit fit with the bracket 11, and the connecting rod assembly keeps a balance state under the cooperation of the jump buckle 14, the limit assembly and the main spring 13, so that the operating mechanism 1 is kept in a tripping state.

An embodiment of an operating mechanism is provided with reference to fig. 1-4, in this embodiment, a limit component is taken as an example to be matched with a bracket 11, the operating mechanism 1 includes a pair of brackets 11 arranged oppositely, and a rocker arm 12, a jump buckle 14, a latch 15, a re-buckle 16, a main spring 13, a link assembly and a limit component arranged between the pair of brackets 11, the bracket 11 is arranged at one side of a conductive system of a circuit breaker, the rocker arm 12 is rotatably supported on the bracket 11 through a third connecting shaft 122, a handle 121 for driving the rocker arm 12 to swing is arranged at one end of the rocker arm 12, a third limit shaft 123 is further arranged at one side of the rocker arm 12, the third limit shaft 123 can be matched with the bracket 11 to limit a rotation angle of the rocker arm 12, meanwhile, the rocker arm 12 can push the jump buckle 14 to rotate through the third limit shaft 123, one end of the jump buckle 14 is rotatably connected to the bracket 11 through a first connecting shaft 141, the jump buckle 14 can rotate around the first connecting shaft 141, the lock catch 15 and the re-buckle 16 are respectively and rotatably arranged on the support 11, the lock catch 15 and the re-buckle 16 are both positioned on one side opposite to the jump buckle 14, the jump buckle 14 is in hasp fit with the lock catch 15 in closing, opening and re-buckling states, the lock catch 15 is in limit fit with the re-buckle 16, one end of the jump buckle 14 is provided with a jump buckle hasp surface, the lock catch 15 is provided with a lock buckle hasp surface, the jump buckle hasp surface is positioned below the lock buckle hasp surface and is in limit fit with the lock catch 15 to realize the hasp fit of the jump buckle 14 and the lock catch 15, and one end of the re-buckle 16 is positioned on one side of the lock catch 15 and is in limit fit with the lock catch 15; when in a tripping state, the secondary buckle 16 is driven by other mechanisms to rotate and is released from the limit fit with the buckle 15, the buckle 15 rotates and releases the limit fit of the buckle surface of the jump buckle and the buckle surface of the buckle, so that the jump buckle 14 is separated from the buckle 15; two ends of the main spring 13 are respectively connected with the rocker arm 12 and the connecting rod assembly, two ends of the connecting rod assembly are respectively connected with the jump buckle 14 and the limiting assembly in a rotating mode, the limiting assembly is rotatably connected to the support 11 and can be in limiting fit with the support 11, the jump buckle 14 and the limiting assembly are respectively arranged on the upper portion and the lower portion of the support 11, the limiting assembly is preferably abutted against the lower edge of the support 11 to achieve limiting fit, and the operating mechanism 1 is kept in a brake separating state, a re-buckling state or a releasing state.

In this embodiment, the link assembly includes a first link 171, a second link 172 and a fourth connecting shaft 174, the limiting assembly includes a connecting member 181, a first linking shaft 182 and a second limiting shaft 183, the bracket 11 is located between the limiting assembly and the link assembly, the limiting assembly and the link assembly are connected by the second limiting shaft 183 and are in limiting fit with the bracket 11, the first link 171 is hinged to one end of the second link 172 by the fourth connecting shaft 174, one end of the main spring 13 is connected to the fourth connecting shaft 174, the other end of the first link 171 is rotatably connected to the middle of the jump buckle 14 to form a rotation connection point 1a of the jump buckle 14 and the link assembly, after the central axis of the main spring 13 crosses the rotation connection point 1a, the main spring 13 changes the driving torque for the first link 171, the first limiting shaft 173 is further connected to the first link 171, and the first limiting shaft 173 cooperates with the jump buckle 14 to limit the rotation angle of the first link 171, the first end of the connecting element 181 is rotatably connected with the bracket 11, the second end of the connecting element 181 is connected with a first linkage shaft 182, the first linkage shaft 182 drives a moving contact of the circuit breaker to perform switching-on and switching-off actions, and the third end of the connecting element 181 is connected with a second limiting shaft 183, wherein the first linkage shaft 182 and the second limiting shaft 183 can be respectively used for limiting and matching with the bracket 11, so that the operating mechanism 1 is kept in a switching-off, re-buckling or tripping state.

In this embodiment, it is preferable that the connecting member 181 is a triangular plate-shaped structure, wherein a first end corner of the connecting member 181 is rotatably connected to the bracket 11 through a second connecting shaft 184, a second end corner of the connecting member 181 is connected to the first linkage shaft 182 for driving the moving contact, the first linkage shaft 182 drives the contact mechanism of the circuit breaker to complete a switching-on operation, a third end corner of the connecting member 181 is rotatably connected to the other end of the second connecting rod 172 through a second limiting shaft 183, the length of the second limiting shaft 183 is smaller than that of the first linkage shaft 182, preferably, when the connecting member drives the connecting member 181 to rotate around the bracket 11, the lower edge of the bracket 11 abuts against the second limiting shaft 183 for limiting, compared with the case that the first linkage shaft 182 is in limiting fit with the bracket 11, the second limiting shaft 183 having a short-axis structure has better rigidity, and the second limiting shaft 183 is in limiting fit with the bracket 11, thereby reducing the possibility of switching-off, The impact of the bracket 11 on the first linkage shaft 182 during the re-buckling and tripping improves the fatigue life of the circuit breaker, and in practical application, the rotating angle and the shape of the connecting piece 181 can be properly adjusted according to the opening and closing angle of the contact mechanism of the circuit breaker.

When the switch is closed, as shown in fig. 1, the trip buckle 14 is in snap-fit with the latch 15, the trip buckle 14 does not rotate under the action of the latch 15, so that the trip buckle 14 is fixed with the rotating connection point 1a of the link assembly, the rocker arm 12 is pushed to rotate clockwise around the third connection shaft 122, when the central axis of the main spring 13 crosses the rotating connection point 1a, that is, the central axis of the main spring 13 is located on the right side of the rotating connection point 1a, the torque of the main spring 13 on the first link 171 changes, so that the first link 171 performs counterclockwise accelerated rotation around the rotating connection point 1a, and at the same time, the second link 172 is pushed to move downward, so that the connecting member 181 is driven to rotate clockwise around the second connection shaft 184 until the first limit shaft 173 is in limit fit with the trip buckle 14, that the first limit shaft 173 is matched with the trip buckle 14 to limit the rotation angle of the first link 171, and the link assembly is in a straight state, that is, the second limit shaft 183 is disengaged from the bracket 11, and at this time, the link assembly, the limit assembly, the trip catch 14, the main spring 13 and the bracket 11 cooperate to form a stable closing mechanism, and the trip catch 14, the first link 171, the second link 172 and the link 181 form a stable four-bar linkage, and at this time, the operating mechanism 1 is maintained in a closing state.

During brake opening, as shown in fig. 1 and 2, the rocker arm 12 is pushed to rotate counterclockwise around the third connecting shaft 122, when the central axis of the main spring 13 crosses the rotation connection point 1a, that is, the central axis of the main spring 13 is located on the left side of the rotation connection point 1a, the main spring 13 changes the torque direction of the first connecting rod 171, the first connecting rod 171 can rotate clockwise rapidly under the driving of the main spring 13 to drive the second connecting rod 172 to move upward, and further drive the connecting member 181 to rotate counterclockwise around the second connecting shaft 184 until the second limiting shaft 183 abuts against the lower edge of the bracket 11 for limiting, so that the operating mechanism 1 is stabilized in a brake opening state under the cooperation of the jump buckle 14, the connecting rod assembly and the limiting assembly main spring 13, and at this time, the connecting rod assembly is in a balanced state of a non-straight state, and the operating mechanism 1 is in a brake opening state.

When the latch 16 is re-latched, as shown in fig. 2, the rocker arm 12 is pushed to rotate counterclockwise around the third connecting shaft 122, and the jump buckle 14 is pushed to rotate around the first connecting shaft 141, after the central axis of the main spring 13 crosses the rotation connection point 1a of the jump buckle 14 and the connecting rod assembly, in fig. 2, the central axis of the main spring 13 is located on the left side of the rotation connection point 1a, the first connecting rod 171 rotates clockwise around the rotation connection point 1a under the action of the main spring 13, the connecting rod 181 is driven to rotate counterclockwise around the second connecting shaft 184 through the second connecting rod 172 until the second limiting shaft 183 abuts against the bracket 11 for limiting, and then, when the third limiting shaft 123 of the rocker arm 12 is limited by the bracket 11, the re-latch 16 is limited again with the latch 15 under the action of the torsion spring disposed on the bracket 11, the jump buckle 14 is in snap-fit with the latch 15 again, so that the operating mechanism 1 is in the position of the jump buckle 14, and the latch 15, Link assembly, spacing subassembly main spring 13 are stable under the cooperation and are detained the state again, and operating device 1's state is the same with the separating brake state this moment, and link assembly is in the balanced state of non-straight state, and main spring 13 can not surpass rotation tie point 1a, otherwise is difficult to accomplish the combined floodgate.

When tripping, as shown in fig. 3 and 4, when the circuit breaker triggers the operating mechanism 1 to trip, the secondary buckle 16 is driven to rotate to release the limit fit with the buckle 15, under the action of the main spring 13, the buckle 15 is separated from the jump buckle 14, the jump buckle 14 rotates clockwise around the first connecting shaft 141, at the same time, the jump buckle 14 drives the first connecting rod 171 and the second connecting rod 172 to separate from the dead zone, the second connecting rod 172 pulls the connecting member 181 to rotate counterclockwise around the second connecting shaft 184, so that the second limit shaft 183 is abutted against and matched with the lower edge of the bracket 11, the jump buckle 14 is in limit fit with the first limit shaft 173 and the third limit shaft 123, so that the jump buckle 14 stops rotating and limits the rotating angle of the first connecting rod 171, at this time, the central axis of the main spring 13 is located on the right side of the rotating connection point 1a of the jump buckle 14 and the connecting rod assembly, and the bracket 11 are matched to keep the operating mechanism 1 in a tripped state, at this time, the connecting rod assembly is in a balance state of a non-straight state.

The operating mechanism of this embodiment, through setting up the spacing subassembly with the spacing cooperation of support 11, make operating mechanism 1 form an independent modular structure, can also accomplish the action when operating mechanism is not connected the cooperation with moving contact 33, namely need not to keep balanced the condition according to the contact of moving contact 33 and static contact, can stably keep closing, separating brake, detain again and the dropout state, adapt to the modular development of circuit breaker, be favorable to operating mechanism 1's assembly and carry out the verification of action reliability.

In addition, as another embodiment, the limit component provided to the operating mechanism 1 is not limited to limit and cooperate with the bracket 11, but the operating mechanism 1 of the present embodiment is not as high in modularity as the above-mentioned embodiments. In this embodiment, it is preferable that the limiting component is in limiting fit with a conductive system in the circuit breaker, for example, in limiting fit with the housing 2, the rotating shaft 31, or the moving contact 33 in the conductive system, and the structure and the matching principle of the operating mechanism 1 are the same as those of the above embodiments, but when the limiting component is matched with the conductive system, it needs to be ensured that the central axis of the main spring 13 does not exceed the rotation connection point 1a after being buckled again, otherwise, closing is difficult to complete.

An embodiment of a circuit breaker is provided with reference to fig. 5 to 7, where the circuit breaker includes a housing, an operating mechanism 1 and at least one conductive system are disposed in the housing, each conductive system includes a housing 2, the housings 2 of the conductive systems cooperate together to form the housing, a conductive plate 4, a contact mechanism, an arc extinguishing system, and a release are disposed in the housing 2, where the contact mechanism is connected to an external circuit through the conductive plate 4, the contact mechanism is driven by the operating mechanism 1 to perform an opening and closing operation, the arc extinguishing system cooperates with the contact mechanism to extinguish an arc generated when the contact mechanism is disconnected, and the release cooperates with the operating mechanism 1 to release by triggering the operating mechanism 1 to achieve a protection function.

As shown in fig. 5-7, the contact mechanism includes a rotating shaft 31, a contact support 32, a contact spring 34, a movable contact 33 and a fixed contact 35, the rotating shaft 31 and the contact support 32 are rotatably engaged with the housing 2, wherein the rotating shaft 31 is concentric with the rotation center of the connecting member 181, the rotating shaft 31 is drivingly connected to the first linkage shaft 182, the movable contact 33 is connected to the contact support 32 and connected to the rotating shaft 31 through the contact spring 34, the fixed contact 35 is fixed in the housing 2 and opposite to the movable contact 33, one end of the fixed contact 35 is connected to the conductive plate 4, and a wiring hole is formed in one side of the conductive plate 4, which extends out of the housing.

As shown in fig. 5, when the handle 121 is pushed clockwise, the rocker arm 12 rotates clockwise under the action of the closing force, at this time, the trip 14 is fixed by the latch 15, when the central axis of the main spring 13 exceeds the rotation connection point 1a, the first link 171 is driven to rotate counterclockwise, at the same time, the first link 171 pushes the second link 172 to move downward, and then the second link 172 pushes the connection 181 to drive the rotation shaft 31 to rotate clockwise, the movable contact 33 is also driven to rotate clockwise under the action of the contact spring 34 until it cooperates with the stationary contact 35, because the torque of the main spring 13 on the second connection shaft 184 is greater than the torque of the contact spring 34 on the second connection shaft 184, the connection 181 drives the rotation shaft 31 to continue to rotate clockwise until the first limit shaft 173 of the first link 171 is limited by the trip 14, the first link 171 and the second link 172 are in a straight state under the action of the main spring 13, and the force is in a closing state after being balanced.

As shown in fig. 5 and 6, when the handle 121 is pushed to open the circuit breaker, the rocker arm 12 rotates counterclockwise, when the central axis of the main spring 13 exceeds the rotation connection point 1a, the torque direction of the main spring 13 to the first link 171 changes, the first link 171 rotates clockwise around the rotation connection point 1a, the first link 171 and the second link 172 are separated from the dead zone, the second link 172 drives the connecting member 181 and the rotating shaft 31 to rotate counterclockwise around the second connection shaft 184, at this time, the force of the contact spring 34 is released, a torque beneficial to opening the contact is generated, when the rotating shaft 31 contacts the moving contact 33, the contact 33 is driven to open the circuit rapidly, until the second limit shaft 183 is in limit fit with the lower edge of the bracket 11 to limit the connecting member 181, the operating mechanism 1 reaches a force balance state, and the circuit breaker completes opening.

As shown in fig. 6, the relocking 16 of the circuit breaker pushes the handle 121 counterclockwise, the swing arm 12 rotates counterclockwise under the action of the relocking 16 force, so that the third limiting shaft 123 pushes the trip 14 to rotate counterclockwise, and at this time, the position of the rotating connection point 1a moves downward, so that the connection element 181 and the rotating shaft 31 rotate counterclockwise by several degrees around the second connection shaft 184, and the movable contact 33 slightly rocks but is not closed. When the central axis of the main spring 13 exceeds the rotation connection point 1a, the first link 171 is driven to rotate clockwise around the rotation connection point 1a, and simultaneously the second link 172 is rapidly driven to move upwards until the second limit shaft 183 is in limit fit with the bracket 11. When the third limit shaft 123 of the rocker arm 12 is limited by the bracket 11 at the angle of the rebuckling 16, the lock catch 15 rotates clockwise under the action of the torsion spring until the rotation angle of the rebuckling 16 is limited by the bracket 11, the lock catch 15 is in snap-fit with the skip buckle 14, the rotation connection point 1a is fixed, and the force is balanced and then is in a rebuckling state.

Tripping of the circuit breaker as shown in fig. 7, when the tripping device triggers the operating mechanism 1 to trip, the rebutch 16 no longer limits the latch 15, the skip buckle 14 is separated from the latch 15, under the action of the main spring 13, the first link 171 and the second link 172 are separated from the dead zone, the first link 171 drives the second link 172 to rapidly move upwards, the second link 172 drives the connecting member 181 to rotate anticlockwise, at this time, the rotating shaft 31 linked with the connecting member 181 through the first linkage shaft 182 also rotates anticlockwise, the force of the contact spring 34 is released, and anticlockwise torque is generated to facilitate the rotation of the rotating shaft 31, when the rotating shaft 31 contacts the moving contact 33, the rotating shaft 31 drives the moving contact 33 to rotate counterclockwise together until the connecting element 181 is limited by the second limiting shaft 183 in cooperation with the bracket 11, the rotation of the jump buckle 14 is limited by the first limiting shaft 173 and the third limiting shaft 123, and the trip is in a free tripping state after the force is balanced.

Compared with the existing circuit breaker, the same linkage shaft in the operating mechanism 1 is used for completing linkage with the rotating shaft 31 and limiting matching with the bracket 11, in the implementation, the second limiting shaft 183 of the limiting component in the operating mechanism 1 is preferably used for limiting matching with the bracket 11, and the first linkage shaft 182 is linked with the rotating shaft 31 to drive the contact 33 mechanism, so that the structure reduces direct impact of the bracket 11 on the first linkage shaft 182183, and the fatigue life of the circuit breaker in the brake opening process is prolonged.

In addition, a limiting structure can be arranged between the shell 2 of the circuit breaker and the movable contact 33 or between the shell 2 of the circuit breaker and the rotating shaft 31, and the limiting structure can keep the movable contact 33 in an opening state or a closing state, so that the matching assembly of the two modularized operating mechanisms 1 is facilitated.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (14)

1. The utility model provides an operating mechanism, includes support (11) and respectively rotates rocking arm (12), jump knot (14), link assembly and main spring (13) of assembling on support (11), the first end of link assembly with jump knot (14) and rotate and be connected, the both ends of main spring (13) are connected its characterized in that with rocking arm (12) and link assembly respectively: the limiting component is rotatably connected with the bracket (11) to form a rotating fulcrum; the limiting assembly is rotatably connected with the second end of the connecting rod assembly, and when the limiting assembly rotates, the second end of the connecting rod assembly is driven to move along a preset track.

2. The operating mechanism of claim 1, wherein: the limiting assembly is matched with the bracket (11) or a conductive system of the circuit breaker, and when the limiting assembly is driven by the movement of the connecting rod assembly to be released from limiting matching with the bracket (11) or the conductive system of the circuit breaker, the operating mechanism (1) is kept in a closing state; or when the movement of the connecting rod assembly drives the limit assembly to be in limit fit with the bracket (11) or the conducting system of the circuit breaker, the operating mechanism (1) is kept in an opening or tripping state.

3. An operating mechanism according to claim 2, wherein: the limiting assembly comprises a connecting piece (181) and a second limiting shaft (183), the first end of the connecting piece (181) is rotatably assembled with the support (11), the second end of the connecting piece (181) is rotatably connected with the connecting rod assembly through the second limiting shaft (183), and the first linkage shaft (182) is in limiting fit with the support (11).

4. An operating mechanism according to claim 2, wherein: the limiting assembly is in limiting fit with the support (11), the limiting assembly comprises a connecting piece (181), a first linkage shaft (182) and a second limiting shaft (183), the first end of the connecting piece (181) is rotatably assembled with the support (11), the first linkage shaft (182) is connected to the second end of the connecting piece (181) and used for driving the moving contact (33), and the third end of the connecting piece (181) is rotatably connected with the connecting rod assembly through the second limiting shaft (183);

the second limit shaft (183) is in limit fit with the bracket (11), and/or the first linkage shaft (182) is in limit fit with a conductive system of the circuit breaker.

5. An operating mechanism according to claim 4, wherein: the connecting piece (181) is triangular, a first end corner of the connecting piece (181) is connected with the bracket (11), and the first linkage shaft (182) and the second limiting shaft (183) are respectively connected with the other two end corners of the connecting piece (181).

6. An operating mechanism according to any one of claims 1 to 5, wherein: the support (11) is arranged between the limiting assembly and the connecting rod assembly, and the limiting assembly and the connecting rod assembly are connected through a second limiting shaft (183) and are in limiting fit with the support (11).

7. An operating mechanism according to claim 6, characterised in that: the connecting rod assembly comprises a first connecting rod (171), a second connecting rod (172) and a fourth connecting shaft (174), the first connecting rod (171) is rotatably connected with one end of the second connecting rod (172) through the fourth connecting shaft (174), one end of a main spring (13) is connected to the fourth connecting shaft (174), the other end of the first connecting rod (171) is rotatably connected with the middle of a jump buckle (14) to form a rotation connecting point (1a) of the jump buckle (14) and the connecting rod assembly, the other end of the second connecting rod (172) is connected with a second limiting shaft (183), a first limiting shaft (173) is further connected to the first connecting rod (171), and the first limiting shaft (173) is matched with the jump buckle (14) to limit the first connecting rod (171) during closing.

8. An operating mechanism according to claim 7, wherein: the operating mechanism further comprises a lock catch (15) and a re-buckle (16), the jump buckle (14) is in snap fit with the lock catch (15), and the lock catch (15) is in limit fit with the re-buckle (16);

in the switching-on process, the jump buckle (14) is in snap-fit with the lock catch (15), the central axis of the rocker arm (12) drives the main spring (13) to cross over the rotating connection point (1a) of the jump buckle (14) and the connecting rod assembly, the main spring (13) drives the first connecting rod (171) to rotate and drives the connecting piece (181) to rotate through the second connecting rod (172), when the first connecting rod (171) is limited by the jump buckle (14), the first connecting rod (171) and the second connecting rod (172) are in a straight state, and the second limiting shaft (183) is separated from the support (11).

9. An operating mechanism according to claim 8, wherein: in the brake separating process, the central axis of the rocker arm (12) drives the main spring (13) to cross over the rotating connection point (1a) of the jump buckle (14) and the connecting rod assembly, the main spring (13) drives the first connecting rod (171) to rotate and drives the connecting piece (181) to rotate through the second connecting rod (172), and the second limiting shaft (183) is abutted against and matched with the support (11).

10. An operating mechanism according to claim 8, wherein: in the process of re-buckling (16), the rocker arm (12) pushes the jump buckle (14) to rotate, the central axis of the main spring (13) crosses a rotating connection point (1a) of the jump buckle (14) and the connecting rod assembly to drive the first connecting rod (171) to rotate and drive the connecting piece (181) to rotate, the second limiting shaft (183) is abutted against and matched with the bracket (11), after the rocker arm (12) is limited, the re-buckling (16) is in limited fit with the buckle (15) again, and the buckle (15) is in snap fit with the jump buckle (14) again.

11. An operating mechanism according to claim 8, wherein: in the tripping process, the secondary buckle (16) is driven to rotate to remove the limit fit with the buckle (15), the buckle (15) is separated from the jump buckle (14) under the drive of the main spring (13), the jump buckle (14) rotates and drives the connecting piece (181) to rotate through the connecting rod assembly, after the central axis of the main spring (13) crosses over the rotating connecting point (1a) of the jump buckle (14) and the connecting rod assembly, the first connecting rod (171) is limited by the jump buckle (14), and the second limit shaft (183) abuts against the support (11) for limitation.

12. A circuit breaker, comprising a housing, characterized in that: an operating mechanism (1) as claimed in any one of claims 1 to 11 and at least one conducting system are assembled in the housing, the conducting system comprises a housing (2) and a contact mechanism arranged in the housing (2), and a limiting component of the operating mechanism (1) comprises a first linkage shaft (182) for driving a movable contact of the contact mechanism.

13. A circuit breaker according to claim 12, wherein: the contact mechanism comprises a rotating shaft (31), a contact support (32), a contact spring (34), a moving contact (33) and a fixed contact (35), the rotating shaft (31) and the contact support (32) are in running fit with the shell (2), the rotating shaft (31) is in driving connection with the first linkage shaft (182), the moving contact (33) is connected to the contact support (32) and is connected with the rotating shaft (31) through the contact spring (34), and the fixed contact (35) is fixed in the shell (2) and is opposite to the moving contact (33).

14. A circuit breaker according to claim 13, wherein: a limiting structure is arranged between the rotating shaft (31) and the shell (2) or between the movable contact (33) and the shell (2), and the movable contact (33) is kept in an opening or closing state by the limiting structure.

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