CN213691937U

CN213691937U - Circuit breaker

Info

Publication number: CN213691937U
Application number: CN202022396710.4U
Authority: CN
Inventors: 辛娜; 秦治斌
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-07-13
Anticipated expiration: 2030-10-23

Abstract

The utility model relates to the field of low-voltage apparatus, in particular to a circuit breaker, wherein a side plate component comprises two side plates which are arranged at intervals, two ends of a main shaft are respectively matched with the two side plates in a rotating way, a stopping suspension arm is arranged on the main shaft and rotates synchronously with the main shaft, and two ends of a stopping shaft are respectively arranged on the two side plates; the circuit breaker further comprises an anti-rebound mechanism, wherein the anti-rebound mechanism comprises an anti-rebound piece which is arranged in a pivoting manner; when the overcurrent release acts to enable the breaker to be opened, the anti-rebound part rotates from an unlocking position to a locking position, the stopping suspension arm rotates towards the opening direction to impact the stopping shaft, the stopping suspension arm is in limit fit with the anti-rebound part to prevent the stopping suspension arm from rebounding towards the closing direction, when the overcurrent release resets, the anti-rebound part is driven to rotate from the locking position to the unlocking position, and the anti-rebound part is released from limit fit with the stopping suspension arm; the utility model discloses circuit breaker, its resilience mechanism and overcurrent release cooperation of preventing make resilience mechanism only effective when breaking disconnected fault current.

Description

Circuit breaker

Technical Field

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

Background

The speed of the breaker is very fast when the breaker is opened, and the breaker mechanism is made of rigid materials, so that the bounce phenomenon of the breaker when the breaker is opened is serious, namely, the moving and static contacts of the breaker have great rebound when reaching the final opening position (maximum opening distance), and the rebound amplitude can reach half of the opening distance; when the breaker breaks large current, the electric arc can not be extinguished in time or even reignited due to the rebound, and the breaking capacity of the breaker is seriously affected.

The existing low-voltage circuit breaker, especially the low-voltage universal circuit breaker, the used contact opening rebound-proof structure forms interlocking by inertia, and prevents the moving contact from generating large-amplitude rebound after opening, and the scheme has poor reliability and is easy to lose efficacy; and the existing contact opening anti-rebound structure can not effectively distinguish whether the breaker is breaking fault current or not, so that the anti-rebound structure can take effect when the breaker is normally opened or breaking fault current, all energy is released inside an operating mechanism of the breaker, and the service life of the operating mechanism is influenced.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a circuit breaker, its resilience mechanism and overcurrent release cooperation are prevented, make resilience mechanism only effective when breaking disconnected fault current.

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

a circuit breaker comprises a side plate assembly 1, a main shaft 2, a blocking stop shaft 1a, a blocking suspension arm 3 and an overcurrent release, wherein the side plate assembly 1 comprises two side plates which are oppositely arranged at intervals, two ends of the main shaft 2 are respectively in rotating fit with the two side plates, the blocking suspension arm 3 is arranged on the main shaft 2 and rotates synchronously with the main shaft, and two ends of the blocking stop shaft 1a are respectively arranged on the two side plates; the circuit breaker further comprises an anti-rebound mechanism, wherein the anti-rebound mechanism comprises an anti-rebound piece 4 which is arranged in a pivoting manner; when overcurrent release moved and made the circuit breaker open brake, anti-rebound piece 4 rotated to latched position by the unblock position, kept off and stopped cantilever 3 and rotated to striking fender and stopped behind the axle 1a to the separating brake direction, kept off and stopped cantilever 3 and anti-rebound 4 spacing cooperation, stopped and stopped cantilever 3 and kick-backed to the combined floodgate direction resilience, when overcurrent release reset, the drive was prevented rebound piece 4 and was rotated to the unblock position by the latched position, anti-rebound piece 4 removed with keep off and stop the spacing cooperation of cantilever 3.

Preferably, the anti-rebound mechanism further comprises a link 5 which is pivotally arranged, and the overcurrent release is in driving fit with the anti-rebound member 4 through the link 5.

Preferably, the overcurrent release comprises a pressure plate 3a which is rotatably arranged, the action of the overcurrent release enables the pressure plate 3a to swing from a reset position to a driving position, the pressure plate 3a drives a connecting rod 5 to rotate so as to avoid the rebound prevention piece 4, the rebound prevention piece 4 rotates from an unlocking position to a locking position, the overcurrent release resets so that the pressure plate 3a swings from the driving position to the reset position and avoids the connecting rod 5, and the connecting rod 5 rotates and drives the rebound prevention piece 4 to rotate from the locking position to the unlocking position.

Preferably, the anti-rebound member 4 and the connecting rod 5 are respectively and pivotally arranged on the side plate assembly 1, and the anti-rebound member 4 and the connecting rod 5 are respectively and pivotally arranged on two sides of the same side plate; the curb plate is equipped with first spacing hole 11, and anti-rebound 4 is including the spacing platform 41 of anti-rebound, and the spacing platform 41 activity of anti-rebound is planted in first spacing hole 11 and passes first spacing hole 11 and connecting rod 5 cooperation.

Preferably, when the rebound preventer 4 is in the locking position, the rebound preventer stopper 41 abuts against a side wall of one end of the first stopper hole 11.

Preferably, one end of the connecting rod 5 is pivotally arranged on the side plate assembly 1, the other end of the connecting rod is matched with the pressing plate 3a, and the middle part of the connecting rod is matched with the anti-rebound limiting table 41.

Preferably, the circuit breaker further comprises a tripping half shaft 6, two ends of the tripping half shaft 6 are respectively arranged on the two side plates, and the overcurrent release acts to drive the tripping half shaft 6 to rotate through a pressing plate 3a of the overcurrent release, so that the circuit breaker is tripped.

Preferably, the circuit breaker further comprises a breaking half shaft return spring 9, and the breaking half shaft return spring 9 applies acting force to the breaking half shaft 6 to enable the breaking half shaft to rotate from the action position to the initial position; the anti-rebound mechanism further comprises an anti-rebound part return spring 7 and a connecting rod return spring 8, the anti-rebound part return spring 7 applies acting force to the anti-rebound part 4 to enable the anti-rebound part to rotate to a locking position from an unlocking position, and the connecting rod return spring 8 applies acting force to the connecting rod 5 to enable the connecting rod 5 to rotate and drives the anti-rebound part 4 to rotate to the unlocking position from the locking position.

Preferably, when the rebound-prevention part 4 is located at the locking position, after one end of the stopping suspension arm 3 collides with the stopping shaft 10, the other end of the stopping suspension arm is in limit fit with the rebound-prevention part 4 to prevent the stopping suspension arm 3 from rebounding towards the closing direction.

Preferably, the stopping suspension arm 3 includes a stopping suspension arm limiting groove 310, the rebounding-preventing member 4 includes a rebounding-preventing member limiting angle 42, and the stopping suspension arm limiting groove 310 and the rebounding-preventing member limiting angle 42 are in limiting fit to prevent the stopping suspension arm 3 from rebounding to the closing direction.

Preferably, the suspension arm 3 further includes a suspension arm contact finger 311 as a sidewall of the suspension arm limiting groove 310; when the overcurrent release acts to enable the circuit breaker to be switched off, the anti-rebound part 4 rotates to a locking position from an unlocking position, the blocking suspension arm 3 rotates to impact the blocking shaft 10 in the switching-off direction, meanwhile, the blocking suspension arm contact finger 311 extrudes the anti-rebound part limiting angle 42 and moves to the other side from one side of the anti-rebound part limiting angle 42, the blocking suspension arm limiting groove 310 is matched with the anti-rebound part limiting angle 42 oppositely, and the blocking suspension arm contact finger 311 is matched with the anti-rebound part limiting angle 42 in a limiting mode to prevent the blocking suspension arm 3 from rebounding in the switching-on direction.

Preferably, the blocking suspension arm 3 includes a separating brake blocking arm 30 and a separating brake locking arm 31 respectively disposed at two ends thereof, and a free end of the separating brake locking arm 31 is provided with a blocking suspension arm limiting groove 310 and a blocking suspension arm contact finger 311.

Preferably, the axis of the main shaft 2, the axis of the stopping shaft 1a, the axis of the opening half shaft 6, the axis of the rotating shaft of the anti-rebound device 4 and the axis of the rotating shaft of the connecting rod 5 are parallel to each other and are perpendicular to the side plate assembly 1, and the axis of the main shaft 2, the axis of the stopping shaft 1a, the axis of the opening half shaft 6 and the axis of the rotating shaft of the anti-rebound device 4 are positioned at four vertex angles of a quadrangle.

Preferably, the circuit breaker further comprises a contact driving arm 2a arranged on the main shaft 2 and rotating synchronously with the main shaft, and the contact driving arm 2a is connected with a moving contact of the circuit breaker in a driving mode.

The utility model discloses circuit breaker, its prevent that kick-back 4 cooperates with the overcurrent release, only when the overcurrent release moves (namely when the circuit breaker divides the disconnected fault current), prevent that the kick-back mechanism takes effect work, consequently showing and reducing the frequency of work of preventing the kick-back mechanism, reduce the energy release in the operating device of circuit breaker, be favorable to improving the life of operating device; and the utility model discloses the mechanism of preventing kick-backing of circuit breaker is different from the current mechanism of preventing kick-backing that utilizes inertia to form the interlocking, adopts reliable mechanical transmission chain to realize that work is more reliable, stability is higher.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the circuit breaker of the present invention, the circuit breaker is in an open state;

fig. 2 is a schematic structural diagram of a first embodiment of the circuit breaker of the present invention, where the circuit breaker starts to open;

fig. 3 is a schematic structural diagram of the first embodiment of the circuit breaker of the present invention, at least showing that during the opening process of the circuit breaker, the opening half shaft is kept at the action position, and the contact finger of the stopping suspension arm starts to press the limiting angle of the anti-rebound member;

fig. 4 is a schematic structural diagram of the first embodiment of the circuit breaker of the present invention, at least showing that when the circuit breaker is in the process of opening and the opening half shaft is kept in the action position, the stopping suspension arm rebounds slightly and is in limit fit with the rebound prevention member, so as to prevent the stopping suspension arm from further rebounding;

fig. 5 is a schematic structural diagram of a first embodiment of the circuit breaker of the present invention, at least showing the matching relationship between the overcurrent release pressing plate and the opening half shaft;

FIG. 6 is a schematic structural view of the opening half shaft of the present invention;

fig. 7 is a schematic structural diagram of a second embodiment of the circuit breaker of the present invention, wherein an overcurrent release is actuated to start opening the circuit breaker;

fig. 8 is a schematic structural diagram of a second embodiment of the circuit breaker of the present invention, wherein after the overcurrent release is actuated to open the circuit breaker, the stopping cantilever is in limit fit with the anti-rebound component;

fig. 9 is a schematic structural diagram of a second embodiment of the circuit breaker of the present invention, wherein the circuit breaker is in the open state, and the overcurrent release is reset to release the limit fit between the anti-rebound member and the stopping suspension arm;

fig. 10 is a schematic perspective view of a circuit breaker according to a second embodiment of the present invention.

Detailed Description

The following description will further describe a specific embodiment of the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 10. The circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-6, it is an embodiment of the circuit breaker of the present invention.

The utility model discloses a circuit breaker, it includes curb plate subassembly 1, main shaft 2, keeps off and stops axle 1a, keeps off and stops cantilever 3 and separating brake semi-axis 6, curb plate subassembly 1 includes two blocks of curb plates that relative interval set up, 2 both ends of main shaft respectively with two blocks of curb plates normal running fit, keep off cantilever 3 set up on main shaft 2 and rotate rather than synchronous, keep off axle 1a both ends respectively with set up on two blocks of curb plates; the circuit breaker further comprises an anti-rebound mechanism, wherein the anti-rebound mechanism comprises an anti-rebound piece 4 which is arranged in a pivoting manner; the opening half shaft 6 rotates to an action position from an initial position to enable the breaker to be opened and the opening half shaft 6 is kept at the action position, the rebound-preventing part 4 rotates to a locking position from an unlocking position, the blocking and stopping cantilever 3 rotates to the opening position to impact the blocking and stopping shaft 1a, the blocking and stopping cantilever 3 is in limit fit with the rebound-preventing part 4 to prevent the blocking and stopping cantilever 3 from rebounding to a closing direction, when the opening half shaft 6 rotates to the initial position from the action position, the opening half shaft 6 drives the rebound-preventing part 4 to rotate to the unlocking position from the locking position, and the rebound-preventing part 4 is relieved from limit fit with the blocking and stopping cantilever 3.

The utility model discloses circuit breaker, its anti-rebound spare 4 cooperates with separating brake semi-axis 6, only when separating brake semi-axis 6 action and not reset (generally take place when circuit breaker divides the breaking fault current, for example overcurrent release action drive separating brake semi-axis 6 rotates and makes the circuit breaker open brake), anti-rebound mechanism takes effect work, consequently showing the work frequency who has reduced anti-rebound mechanism, reduce the energy release in the operating device of circuit breaker inside, be favorable to improving operating device's life; and the utility model discloses the mechanism of preventing kick-backing of circuit breaker is different from the current mechanism of preventing kick-backing that utilizes inertia to form the interlocking, adopts reliable mechanical transmission chain to realize that work is more reliable, stability is higher.

Note that "the stopping suspension arm 3 rebounds in the closing direction" means that after the stopping suspension arm 3 rapidly hits the stopping shaft 1a, the stopping suspension arm 3 rotates in the closing direction under the driving of the reaction force of the stopping shaft 1 a.

Preferably, as shown in fig. 1 to 5, the blocking suspension arm 3 includes a blocking suspension arm limiting groove 310, the anti-rebound member 4 includes an anti-rebound member limiting angle 42, and the blocking suspension arm limiting groove 310 is in limiting fit with the anti-rebound member limiting angle 42 to prevent the blocking suspension arm 3 from rebounding in the closing direction. Further, as shown in fig. 1 to 5, the suspension arm 3 further includes a suspension arm contact finger 311 as a side wall of the suspension arm limiting groove 310; when the opening half shaft 6 rotates from the initial position to the action position to enable the breaker to be opened and the opening half shaft 6 is kept at the action position, the rebound-proof piece 4 rotates to the locking position, the blocking suspension arm 3 rotates to impact the blocking suspension shaft 1a in the opening direction, meanwhile, the blocking suspension arm contact finger 311 extrudes the rebound-proof piece limiting angle 42 and the blocking suspension arm contact finger 311 moves from one side of the rebound-proof piece limiting angle 42 to the other side of the rebound-proof piece limiting angle 42, the blocking suspension arm limiting groove 310 is opposite to the rebound-proof piece limiting angle 42, the blocking suspension arm contact finger 311 is in limiting fit with the rebound-proof piece limiting angle 42, and the blocking suspension arm 3 is prevented from rebounding in the closing direction. The anti-rebound part 4 is directly matched with the blocking suspension arm 3, so that the reliability and stability of the matching of the anti-rebound part and the blocking suspension arm are improved, and the effective work of the anti-rebound mechanism is ensured.

Preferably, as shown in fig. 5, the circuit breaker of the present invention further includes an overcurrent release, the overcurrent release is in driving fit with the driving post 60 of the opening half-shaft through the pressing plate 3a, and the driving opening half-shaft 6 is rotated to the action position from the initial position, so as to open the circuit breaker.

Fig. 7-10 illustrate another embodiment of a circuit breaker according to the present invention.

The present embodiment differs from the circuit breaker of the above embodiment in that: the opening half shaft 6 and the rebound-proof piece 4 do not have a driving relation, but an overcurrent release is in driving fit with the rebound-proof piece 4; specifically, when the overcurrent release acts to open the brake of the circuit breaker, the rebound prevention part 4 rotates to a locking position from an unlocking position, the blocking suspension arm 3 rotates to the impact blocking stop shaft 1a in the brake opening direction, the blocking suspension arm 3 is in limit fit with the rebound prevention part 4, the blocking suspension arm 3 is prevented from rebounding to the closing direction, when the overcurrent release resets, the rebound prevention part 4 is driven to rotate to the unlocking position from the locking position, and the rebound prevention part 4 is relieved from the limit fit with the blocking suspension arm 3.

Preferably, as shown in fig. 7-10, the anti-rebound mechanism further comprises a pivotally arranged link 5, and the overcurrent release is in driving engagement with the anti-rebound member 4 through the link 5. Further, as shown in fig. 7-10, the overcurrent release includes a pressure plate 3a which is rotatably disposed, the action of the overcurrent release causes the pressure plate 3a to swing from a reset position to a driving position, the pressure plate 3a drives a link 5 to rotate so as to avoid the rebound prevention member 4, the rebound prevention member 4 rotates from an unlocking position to a locking position, the overcurrent release resets so that the pressure plate 3a swings from the driving position to the reset position and avoids the link 5, and the link 5 rotates and drives the rebound prevention member 4 to rotate from the locking position to the unlocking position.

As shown in fig. 1-6, a first embodiment of the circuit breaker of the present invention is shown.

As shown in fig. 1-6, the circuit breaker of the present invention comprises a side plate assembly 1, a main shaft 2, a stop shaft 1a, a stop cantilever 3, a tripping half shaft 6 and a rebound prevention mechanism; the side plate assembly 1 comprises two side plates which are oppositely arranged at intervals, two ends of the main shaft are respectively in rotating fit with the two side plates, the stopping suspension arm 3 is arranged on the main shaft 2 and synchronously rotates with the main shaft, and two ends of the stopping shaft 1a are respectively arranged on the two side plates; the anti-rebound mechanism comprises an anti-rebound member 4 which is pivotally arranged; the opening half shaft 6 rotates to the action position from the initial position to enable the breaker to be opened and the opening half shaft 6 is kept at the action position, the rebound-preventing part 4 rotates to the locking position from the unlocking position, the blocking suspension arm 3 rotates to the impact blocking suspension shaft 1a in the opening direction, the blocking suspension arm 3 is in limit fit with the rebound-preventing part 4 to prevent the blocking suspension arm 3 from rebounding in the closing direction, when the opening half shaft 6 rotates to the initial position from the action position, the opening half shaft 6 drives the rebound-preventing part 4 to rotate to the unlocking position from the locking position, and the rebound-preventing part 4 is relieved from limit fit with the blocking suspension arm 3.

Preferably, as shown in fig. 5, the circuit breaker of the present invention includes an overcurrent release, the overcurrent release includes a pressing plate 3a disposed in a rotating manner, the action of the overcurrent release is in driving fit with the opening half shaft transmission column 60 of the opening half shaft 6 through the pressing plate 3a, the opening half shaft 6 is driven to rotate from an initial position to an action position, and the opening half shaft 6 is kept at the opening position; when the overcurrent release is reset, the opening half shaft 6 rotates from the action position to the initial position. Further, as shown in fig. 1-5 and 7-10, the overcurrent release is actuated to swing the pressure plate 3a from the reset position to the driving position, and the pressure plate 3a drives the opening half shaft 6 to rotate from the initial position to the actuated position; the overcurrent release resets to enable the pressure plate 3a to swing from the driving position to the reset position and avoid the opening half shaft 6, and the opening half shaft 6 rotates from the action position to the initial position. Specifically, as shown in fig. 5, the middle of the pressing plate 3a is provided with a pressing plate connecting groove having a U-shaped structure, which is in driving fit with the overcurrent release, and one end of the pressing plate connecting groove is arranged above the opening half-shaft transmission column 60 and is in driving fit with the opening half-shaft transmission column.

It should be pointed out that the utility model discloses circuit breaker, preferred be a circuit breaker with energy storage operating device, wherein curb plate subassembly 1, main shaft 2, fender stop shaft 1a, fender stop cantilever 3, separating brake semi-axis 6 and overcurrent release are the inherent component of energy storage operating device; the rotation of the main shaft 2 can drive a moving contact and a static contact of the circuit breaker to be closed/opened, so that the switching on/off of the circuit breaker is realized. Furthermore, the energy storage operating mechanism further comprises a tripping button matched with the tripping half shaft 6, a user presses the tripping button to enable the tripping half shaft 6 to rotate to an action position from an initial position, the circuit breaker is driven to trip, and when the circuit breaker generates overcurrent, the overcurrent release acts to drive the tripping half shaft 6 to rotate so as to enable the circuit breaker to trip and trip. Preferably, as shown in fig. 1-5, the circuit breaker of the present invention further includes a contact driving arm 2a disposed on the main shaft 2 and rotating synchronously therewith, wherein the contact driving arm 2a is connected to a moving contact of the circuit breaker.

Preferably, as shown in fig. 1-5, the anti-rebound mechanism further comprises a pivotally arranged link 5, and the opening half shaft 6 is in driving engagement with the anti-rebound member 4 through the link 5. Further, as shown in fig. 1 to 5, the opening half shaft 6 includes an opening half shaft transmission column 60, and the anti-rebound member 4 includes an anti-rebound member limit table 41; as shown in fig. 2-4, the opening half shaft 6 rotates from an initial position to an action position, the opening half shaft 6 drives the opening half shaft transmission column 60 to swing, the opening half shaft transmission column 60 drives the connecting rod 5 to rotate, the connecting rod 5 avoids the rebound-preventing member 4, and the rebound-preventing member 4 rotates from an unlocking position to a locking position; when the opening half shaft 6 rotates from the action position to the initial position, the opening half shaft 6 drives the opening half shaft transmission column 60 to swing, the opening half shaft transmission column 60 avoids the connecting rod 5, and the connecting rod 5 rotates and drives the rebound-preventing piece 4 to rotate from the locking position to the unlocking position through the rebound-preventing piece limiting table 41.

Preferably, as shown in fig. 1 to 5, the axis of the main shaft 2, the axis of the stopping shaft 1a, the axis of the opening half shaft 6, the axis of the rotating shaft of the anti-rebound device 4 and the axis of the rotating shaft of the connecting rod 5 are parallel to each other and are perpendicular to the side plate assembly 1, and the axis of the main shaft 2, the axis of the stopping shaft 1a, the axis of the opening half shaft 6 and the axis of the rotating shaft of the anti-rebound device 4 are located at four vertex angles of a quadrangle. Further, as shown in fig. 1 to 5, the connecting rod 5 is disposed adjacent to and between the opening half shaft 6 and the antirebound device 4.

Preferably, as shown in fig. 4, when the anti-rebound device 4 is located at the locking position, after one end of the stopping suspension arm 3 strikes the stopping shaft 1a, the other end of the stopping suspension arm 3 is in limit fit with the anti-rebound device 4 to prevent the stopping suspension arm 3 from rebounding in the closing direction.

Preferably, as shown in fig. 1, the circuit breaker of the present invention further includes a tripping half-shaft return spring 9, wherein the tripping half-shaft return spring 9 applies an acting force to the tripping half-shaft 6 to rotate the tripping half-shaft from the actuating position to the initial position; the rebound-proof part mechanism further comprises a rebound-proof part return spring 7 and a connecting rod return spring 8, the rebound-proof part return spring 7 applies acting force to the rebound-proof part return spring 4 to enable the rebound-proof part return spring to rotate to a locking position from an unlocking position, and the connecting rod return spring 8 applies acting force to the connecting rod 5 to enable the rebound-proof part return spring to rotate and drive the rebound-proof part 4 to rotate to the unlocking position from the locking position. Furthermore, the opening half shaft return spring 9, the rebound-proof part return spring 7 and the connecting rod return spring 8 are torsion springs.

Specifically, as shown in fig. 2-4, when the opening half shaft 6 rotates from the initial position to the actuating position and the opening half shaft 6 is kept at the actuating position, the opening half shaft 6 drives the opening half shaft transmission column 60 to swing clockwise, the opening half shaft transmission column 60 drives the connecting rod 5 to rotate counterclockwise to avoid the rebound prevention member 4, the rebound prevention member 4 rotates counterclockwise under the action of the rebound prevention member return spring 7 and rotates from the unlocking position to the locking position, meanwhile, the blocking cantilever 3 rotates counterclockwise (in the opening direction) until the left end of the blocking cantilever 3 strikes the blocking shaft 1a, the right end of the blocking cantilever 3 is in limit fit with the rebound prevention member 4, and the blocking cantilever 3 is prevented from rotating clockwise (in the closing direction); as shown in fig. 1, when the opening half shaft 6 is reset from the action position to the initial position under the action of the opening half shaft reset spring 9, the opening half shaft 6 drives the opening half shaft transmission column 60 to swing in the counterclockwise direction, the opening half shaft transmission column 60 avoids the connecting rod 5, the connecting rod 5 rotates in the clockwise direction under the action of the connecting rod reset spring 8 and drives the rebound prevention member 4 to rotate from the locking position to the unlocking position, the rebound prevention member 4 avoids the right end of the stop cantilever 3, and the two release the limit matching. According to the process, when the breaker breaks the fault current, the overcurrent release acts and keeps the opening half shaft 6 at the action position through the pressing plate 3a, the rebound prevention mechanism takes effect at the moment, the rebound of the stop cantilever 3 can be effectively prevented, namely the rebound of the moving contact of the breaker is prevented, and the reliable breaking of the breaker is ensured; and the utility model discloses during the normal separating brake of circuit breaker, for example the user rotates to the action position by initial position through separating brake button drive separating brake semi-axis 6, then releases the separating brake button, and separating brake semi-axis 6 then automatic re-setting to initial position under separating brake semi-axis reset spring 9's effect, also drives and prevents 4 rotations to the unblock position of kick-back spare, prevents this moment that the rebound mechanism then became invalid.

Preferably, as shown in fig. 1-5, the anti-rebound member 4 and the link 5 are pivotally disposed on the side plate assembly 1, and the anti-rebound member 4 and the link 5 are disposed on both sides of the same side plate. Further, as shown in fig. 1 to 5, the side plate is provided with a first limiting hole 11 and a second limiting hole 12, the anti-rebound member limiting table 41 is movably inserted in the first limiting hole 11 and passes through the first limiting hole 11 to be matched with the connecting rod 5, and the opening half-shaft transmission column 60 is movably inserted in the second limiting hole 12 and passes through the second limiting hole 12 to be matched with the connecting rod 5.

Preferably, the side plate assembly 1 comprises an assembly space arranged between two side plates, the opening half shaft 6, the rebound prevention piece 4, the stopping suspension arm 3, the stopping shaft 1a and the main shaft 2 are positioned in the assembly space, and the connecting rod 5 is positioned on one side of the side plate assembly 1.

Preferably, as shown in fig. 2 to 4, when the anti-rebound device 4 is located at the locking position, the anti-rebound device limiting table 41 abuts against one end side wall of the first limiting hole 11. Specifically, as shown in fig. 2 to 4, the anti-rebound member 4 makes the anti-rebound member limit table 41 abut against the right end side wall of the first limit hole 11 under the action of the anti-rebound member return spring 7. It should be noted that the circuit breaker of the present invention can also position the rebound-prevention member 4 at the locking position by providing the limiting rib and the limiting shaft (pin) which are in limiting fit with the rebound-prevention member 4; the rebound prevention member stopper 41 may be formed by bending a part of the rebound prevention member 4, or may be a shaft (pin) structure provided on the rebound prevention member 4.

Preferably, as shown in fig. 1 to 5, is an embodiment of the connecting rod 5: one end of the connecting rod 5 is pivotally arranged on the side plate assembly 1, the other end of the connecting rod is matched with the opening half shaft transmission column 60, and the middle part of the connecting rod is in limit matching with the anti-rebound part limit table 41. Further, as shown in fig. 1 to 5, the connecting rod 5 includes a first connecting rod contact surface 50 and a second connecting rod contact surface 51, which are disposed at one end of the connecting rod, the first connecting rod contact surface 50 is an arc surface, the second connecting rod contact surface 51 is a plane surface, when the opening half shaft 6 is located at the initial position, the opening half shaft transmission column 60 abuts against the first connecting rod contact surface 50, and when the opening half shaft 6 is located at the actuation position, the opening half shaft transmission column 60 abuts against the second connecting rod contact surface 51. It should be noted that the first contact surface of the connecting rod and the second contact surface of the connecting rod may be a continuous arc surface.

Preferably, as shown in fig. 2 to 4, the blocking suspension arm 3 includes a blocking suspension arm limiting groove 310, the anti-rebound member 4 includes an anti-rebound member limiting angle 42, and the blocking suspension arm limiting groove 310 is in limiting fit with the anti-rebound member limiting angle 42 to prevent the blocking suspension arm 3 from rebounding in the closing direction. Further, as shown in fig. 2 to 4, the suspension arm 3 further includes a suspension arm contact finger 311 as a side wall of the suspension arm limiting groove 310; the tripping device operates to drive the opening half shaft 6 to rotate from an initial position to an operating position to open the circuit breaker, and when the overcurrent tripping device enables the opening half shaft 6 to be kept at the operating position, the rebound-proof piece 4 rotates to a locking position, the stopping suspension arm 3 rotates to impact the stopping shaft 1a in the opening direction, meanwhile, the stopping suspension arm contact finger 311 extrudes the rebound-proof piece limiting angle 42 and moves from one side of the rebound-proof piece limiting angle 42 to the other side of the rebound-proof piece limiting angle 311, so that the stopping suspension arm limiting groove 310 is matched with the rebound-proof piece limiting angle 42 in a relative mode, the stopping suspension arm contact finger 311 is matched with the rebound-proof piece limiting angle 42 in a limiting mode, and the stopping suspension arm 3 is prevented from rebounding in the closing direction. It should be noted that the blocking suspension arm 3 may also be provided with the blocking suspension arm contact finger 311 instead of the blocking suspension arm limiting groove 310, and may also have a function of preventing the blocking suspension arm 3 from rebounding in the closing direction, and certainly, the blocking suspension arm 3 may be provided with a structure that cooperates with the rebound-preventing member limiting angle 42, such as a convex rib, a shaft (pin), and the like, or may be limited by the rebound-preventing member limiting angle 42 through extrusion.

Preferably, as shown in fig. 1 to 4, the free end surface of the suspension arm contact finger 311 is an arc surface, so that when the suspension arm contact finger 311 presses the anti-rebound member limiting angle 42 and moves from one side of the anti-rebound member limiting angle 42 to the other side thereof, the movement is smoother.

Preferably, as shown in fig. 1 to 4, the side surface of the anti-rebound member limiting angle 42, which is engaged with the suspension arm contact finger 311, is an arc surface, so that when the anti-rebound member limiting angle 42 is disengaged from the limiting engagement with the suspension arm contact finger 311, the action is smoother.

Specifically, as shown in fig. 2-4, when the opening half shaft 6 is kept at the action position and the rebound-proof piece 4 is located at the locking position, the stopping cantilever 3 rotates anticlockwise until the left end of the stopping cantilever 3 strikes the stopping shaft 1a, meanwhile, a stopping suspension arm contact finger 311 at the right end of the stopping suspension arm 3 presses the anti-rebound member limiting angle 42 from the lower part of the anti-rebound member limiting angle 42 to enable the anti-rebound member 4 to rotate clockwise (the direction of the unlocking position), the stopping suspension arm contact finger 311 moves to the upper part from the lower part of the anti-rebound member limiting angle 42, the anti-rebound member limiting angle 42 also resets to the locking position, then, when the gear stop cantilever 3 starts to move clockwise (closing direction) by the reaction of the gear stop shaft 1a, the stopping cantilever contact finger 311 is in limit fit with the limit angle 42 of the rebound-prevention member, and the stopping cantilever 3 is prevented from rotating clockwise (i.e. the stopping cantilever 3 is prevented from rebounding in the closing direction).

Preferably, as shown in fig. 1 to 5, is an embodiment of the blocking suspension arm 3: the blocking suspension arm 3 comprises a brake separating blocking arm 30 and a brake separating locking arm 31 which are respectively arranged at two ends of the blocking suspension arm, and a blocking suspension arm limiting groove 310 and a blocking suspension arm contact finger 311 are arranged at the free end of the brake separating locking arm 31. Further, as shown in fig. 1 to 5, the free end surface of the blocking suspension arm contact finger 311 is an arc surface.

Preferably, the utility model discloses the circuit breaker still includes the divide-shut brake indicator, stops the separating brake locking arm 31 drive cooperation of cantilever 3 with keeping off, indicates the separating brake/combined floodgate state of circuit breaker. Further, the opening and closing indicating piece is arranged on the side plate assembly 1 in a pivoting mode.

Preferably, as shown in fig. 1 to 5, the stopping suspension arm 3 further comprises a fixed mounting arm, and the stopping suspension arm 3 is arranged on the main shaft 2 through the fixed mounting arm. Further, as shown in fig. 1 to 5, the opening blocking arm 30, the opening locking arm 31 and the fixed mounting arm are integrally formed in a Y-shaped structure.

Preferably, as shown in fig. 6, it is an embodiment of the opening half shaft 6: the opening half shaft comprises an opening half shaft main body 62, a transmission column connecting arm 61 and an opening half shaft transmission column 60, one end of the transmission column connecting arm 61 is connected with the opening half shaft main body 62, the other end of the transmission column connecting arm is connected with the opening half shaft transmission column 60, and the axis of the opening half shaft main body 62 is parallel to the axis of the opening half shaft transmission column 60.

It should be pointed out, the utility model discloses the circuit breaker is not limited to only including a set of resilience mechanism of preventing, for example the utility model discloses the circuit breaker can stop the cantilever 3 including two sets of resilience mechanisms of preventing and two fender, two keep off the both sides that the cantilever 3 lies in contact actuating arm 2a respectively, cooperate with two sets of resilience mechanisms of preventing respectively, the both sides that the rebound spare 4 and connecting rod 5 of preventing of each group resilience mechanism lie in a curb plate respectively, corresponding separating brake semi-axis 6's structure also need be made corresponding adjustment, respectively set up a separating brake semi-axis drive post 60 at separating brake semi-axis 6 both ends promptly, in order to prevent the connecting rod 5 cooperation of resilience mechanism with two respectively.

As shown in fig. 7-10, a second embodiment of the circuit breaker of the present invention is shown.

The circuit breaker of the second embodiment differs from the first embodiment in that: the opening half shaft 6 is not in driving fit with the connecting rod 5, but the overcurrent release is in driving fit with the opening half shaft 6 through the pressing plate 3a of the overcurrent release and is directly in driving fit with the connecting rod 5. Specifically, as shown in fig. 7-10, the end of the pressure plate 3a in driving fit with the opening half shaft 6 is simultaneously in driving fit with the connecting rod 5.

The operation of the circuit breaker of the present embodiment will be further described with reference to fig. 7 to 9.

As shown in fig. 7, the current release operates to swing the pressing plate 3a from the reset position to the driving position (from top to bottom), the pressing plate 3a drives the opening half shaft 6 to rotate from the initial position (the opening half shaft transmission column 60 is located at the upper end of the second limit hole 12) to the operating position (the opening half shaft transmission column 60 is located at the lower end of the second limit hole 12) against the acting force of the opening half shaft reset spring 9, so that the pressing plate 3a drives the connecting rod 5 to rotate (rotate in the counterclockwise direction) against the acting force of the connecting rod reset spring 8 and avoid the rebound-preventing member 4 while the circuit breaker is opened, and the rebound-preventing member 4 rotates (rotate in the counterclockwise direction) from the unlocking position to the locking position under the action of the rebound-preventing member reset spring 7; as shown in fig. 8, the circuit breaker of the present invention completes the opening, the pressing plate 3a keeps the opening half shaft 6 at the actuating position and the anti-rebounding element 4 at the locking position, the stopping suspension arm 3 strikes the stopping shaft 1a and is in spacing fit with the anti-rebounding element 4, and the stopping suspension arm 3 is prevented from rebounding in the closing direction (clockwise); as shown in fig. 9, after the current release is reset, the pressing plate 3a swings from the driving position to the reset position, the pressing plate 3 avoids the opening half shaft 6 and the connecting rod 5, the opening half shaft 6 rotates from the action position to the initial position under the action of the opening half shaft reset spring 9, the connecting rod 5 rotates under the action of the connecting rod reset spring 8 and drives the rebound prevention member 4 to overcome the rebound prevention member reset spring 7 and rotate from the locking position to the unlocking position, the rebound prevention member 4 releases the limit fit with the blocking suspension arm 3, and the circuit breaker can be normally closed subsequently.

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

1. A circuit breaker comprises a side plate assembly (1), a main shaft (2), a blocking stop shaft (1a), a blocking stop cantilever (3) and an overcurrent release, wherein the side plate assembly (1) comprises two side plates which are oppositely arranged at intervals, two ends of the main shaft (2) are respectively in running fit with the two side plates, the blocking stop cantilever (3) is arranged on the main shaft (2) and synchronously rotates with the main shaft, and two ends of the blocking stop shaft (1a) are respectively arranged on the two side plates; the method is characterized in that: the circuit breaker further comprises an anti-rebound mechanism, wherein the anti-rebound mechanism comprises an anti-rebound piece (4) which is arranged in a pivoting manner; when overcurrent release moves and makes the circuit breaker open brake, prevent that rebound spare (4) from rotating to latched position by the unblock position, keep off cantilever (3) and rotate to striking fender to stop behind axle (1a) to the separating brake direction, keep off cantilever (3) and prevent the spacing cooperation of rebound spare (4), prevent to keep off cantilever (3) and kick-back to the combined floodgate direction, when overcurrent release resets, drive prevent rebound spare (4) and rotate to the unblock position by the latched position, prevent rebound spare (4) remove and keep off the spacing cooperation of cantilever (3).

2. The circuit breaker of claim 1, wherein: the anti-rebound mechanism further comprises a connecting rod (5) which is arranged in a pivoting mode, and the overcurrent release is in driving fit with the anti-rebound piece (4) through the connecting rod (5).

3. The circuit breaker of claim 2, wherein: the overcurrent release comprises a pressing plate (3a) which is arranged in a rotating mode, the overcurrent release acts to enable the pressing plate (3a) to swing from a reset position to a driving position, the pressing plate (3a) drives a connecting rod (5) to rotate so as to avoid an anti-rebound piece (4), the anti-rebound piece (4) rotates from an unlocking position to a locking position, the overcurrent release resets to enable the pressing plate (3a) to swing from the driving position to the reset position and avoid the connecting rod (5), and the connecting rod (5) rotates and drives the anti-rebound piece (4) to rotate from the locking position to the unlocking position.

4. The circuit breaker of claim 3, wherein: the anti-rebound part (4) and the connecting rod (5) are respectively arranged on the side plate assembly (1) in a pivoting manner, and the anti-rebound part (4) and the connecting rod (5) are respectively arranged on two sides of the same side plate in a pivoting manner; the side plate is provided with a first limiting hole (11), the rebound-prevention piece (4) comprises a rebound-prevention piece limiting table (41), and the rebound-prevention piece limiting table (41) is movably inserted into the first limiting hole (11) and penetrates through the first limiting hole (11) to be matched with the connecting rod (5).

5. The circuit breaker of claim 4, wherein: when the rebound-prevention piece (4) is located at the locking position, the rebound-prevention piece limiting table (41) is abutted against the side wall of one end of the first limiting hole (11).

6. The circuit breaker of claim 4, wherein: one end of the connecting rod (5) is pivoted on the side plate assembly (1), the other end of the connecting rod is matched with the pressing plate (3a), and the middle part of the connecting rod is matched with the anti-rebound part limiting table (41).

7. The circuit breaker of claim 3, wherein: the circuit breaker further comprises a tripping half shaft (6), two ends of the tripping half shaft (6) are respectively arranged on the two side plates, and the overcurrent release acts to drive the tripping half shaft (6) to rotate through a pressing plate (3a) of the overcurrent release, so that the circuit breaker is tripped.

8. The circuit breaker of claim 7, wherein: the circuit breaker also comprises a switching-off half shaft return spring (9), wherein the switching-off half shaft return spring (9) applies acting force to the switching-off half shaft (6) to enable the switching-off half shaft to rotate from an action position to an initial position; the anti-rebound mechanism further comprises an anti-rebound part return spring (7) and a connecting rod return spring (8), the anti-rebound part return spring (7) applies acting force to the anti-rebound part (4) to enable the anti-rebound part to rotate to a locking position from an unlocking position, and the connecting rod return spring (8) applies acting force to the connecting rod (5) to enable the connecting rod (5) to rotate and drives the anti-rebound part (4) to rotate to the unlocking position from the locking position.

9. The circuit breaker of claim 1, wherein: when the rebound prevention part (4) is located at the locking position, one end of the blocking stop cantilever (3) collides with the blocking stop shaft (10), and the other end of the blocking stop cantilever is in limit fit with the rebound prevention part (4) to prevent the blocking stop cantilever (3) from rebounding to the closing direction.

10. The circuit breaker according to claim 1 or 9, characterized in that: the blocking and stopping cantilever (3) comprises a blocking and stopping cantilever limiting groove (310), the rebound prevention part (4) comprises a rebound prevention part limiting angle (42), the blocking and stopping cantilever limiting groove (310) is in limiting fit with the rebound prevention part limiting angle (42), and the blocking and stopping cantilever (3) is prevented from rebounding to the closing direction.

11. The circuit breaker of claim 10, wherein: the blocking suspension arm (3) further comprises a blocking suspension arm contact finger (311) serving as one side wall of the blocking suspension arm limiting groove (310); when the overcurrent release acts to enable the circuit breaker to be switched off, the rebound prevention piece (4) rotates to a locking position from an unlocking position, the blocking stop cantilever (3) rotates to the collision blocking stop shaft (10) in the switching-off direction, meanwhile, the blocking stop cantilever contact finger (311) extrudes the rebound prevention piece limiting angle (42) and the blocking stop cantilever contact finger (311) moves to the other side from one side of the rebound prevention piece limiting angle (42), the blocking stop cantilever limiting groove (310) is matched with the rebound prevention piece limiting angle (42) relatively, the blocking stop cantilever contact finger (311) is matched with the rebound prevention piece limiting angle (42) in a limiting mode, and the blocking stop cantilever (3) is prevented from rebounding to the switching-on direction.

12. The circuit breaker of claim 11, wherein: the blocking and stopping cantilever (3) comprises a brake separating blocking and stopping arm (30) and a brake separating locking arm (31) which are arranged at the two ends of the blocking and stopping cantilever respectively, and a blocking and stopping cantilever limiting groove (310) and a blocking and stopping cantilever contact finger (311) are arranged at the free end of the brake separating locking arm (31).

13. The circuit breaker of claim 7, wherein: the axis of the main shaft (2), the axis of the stopping shaft (1a), the axis of the opening half shaft (6), the axis of the rotating shaft of the rebound prevention piece (4) and the axis of the rotating shaft of the connecting rod (5) are parallel to each other and are perpendicular to the side plate assembly (1), and the axis of the main shaft (2), the axis of the stopping shaft (1a), the axis of the opening half shaft (6) and the axis of the rotating shaft of the rebound prevention piece (4) are located at four top corners of a quadrangle.

14. The circuit breaker of claim 1, wherein: the circuit breaker further comprises a contact driving arm (2a) which is arranged on the main shaft (2) and synchronously rotates with the main shaft, and the contact driving arm (2a) is connected with a moving contact of the circuit breaker in a driving mode.