CN219759497U - Locking structure of breaker operating mechanism - Google Patents

Abstract

A locking structure of a breaker operating mechanism comprises a bracket, a handle lever assembly, a lock catch assembly and a connecting rod mechanism; the handle lever component and the lock catch component are rotationally arranged on the bracket, the lock catch component and the connecting rod mechanism are in snap fit for locking or unlocking the connecting rod mechanism, and the handle lever component drives the connecting rod mechanism to move to realize the opening and closing of the circuit breaker, and the circuit breaker is characterized in that: the operating mechanism further comprises a transmission mechanism, the transmission mechanism is driven by the handle lever assembly and is switched between a first position and a second position, when the handle lever assembly is in a closing or tripping position, the transmission mechanism is in the first position, the transmission mechanism is separated from the locking assembly, and the operating mechanism can be tripped; when the handle lever assembly is in the opening position, the transmission mechanism is in the second position, and the transmission mechanism acts on the lock catch assembly to enable the lock catch assembly to be kept in the locking position, so that the operating mechanism cannot be tripped. The advantages are that: the complexity of operation is reasonably reduced, the unlocking operation mechanism is unlocked when the breaker is in a breaking state, and the breaker is still in a hasp state and does not trip.

Description

Locking structure of breaker operating mechanism

Technical Field

The utility model belongs to the technical field of piezoelectric devices, and particularly relates to a locking structure of a breaker operating mechanism.

Background

A typical example of a circuit breaker is, but not limited to, a molded case circuit breaker, which is a circuit breaker that controls and protects a circuit by closing, opening, and tripping the circuit. The aforementioned closing, opening and tripping are essentially achieved by operating the circuit breaker, in particular by unlocking the operating mechanism in the closed state to trip the circuit breaker

The circuit is cut off to achieve the purpose of protecting the circuit.

As is known in the art, whether the overload, short-circuit release or the shunt and under-voltage release is achieved by unlocking a latch of an operating mechanism, namely a latch portion 181 in fig. 12, referring to fig. 11 to 13, the operating mechanism 1 includes a bracket 11, a handle lever assembly 12 rotatably mounted on the bracket 11, a trip lever 13, a first latch member 14, an upper link 15, a lower link 16, a second latch member 17 and a traction rod 18, wherein the traction rod 18 and the second latch member 17 are in snap fit, the second latch member 17 is in abutting fit with the first latch member 14 through a second latch member bearing 171, the first latch member 14 and the trip lever 13 are in snap fit for locking or unlocking the trip lever 13, the upper link 15 and the lower link 16 are hinged to each other, the upper link 15 is rotatably connected with the trip lever 13, and the lower link 16 is connected with a rotating shaft 3 for driving a moving contact to rotate to achieve the closing and opening of the circuit breaker. The existing breaker operating mechanism performs unlocking operation in a breaking state, the trip lever 13 of the breaker is in a buckling state, the buckling part 131 of the trip lever 13 is overlapped with the buckling surface 141 of the first buckling piece 14, the trip lever 13 has a clockwise rotating trend under the action of the main tension spring force of the operating mechanism 1, and the trip lever 13 keeps a balanced static state under the reaction force applied by the first buckling piece 14. The second latch member bearing 171 mounted on the second latch member 17 of the latch assembly abuts against the upper back surface 142 of the first latch member 14, and the first latch member 14 tends to rotate counterclockwise under the force of the latch lever 13, and the first latch member 14 maintains a balanced and stationary state under the reaction force applied by the second latch member 17. The traction rod 18 is in a reset state, the locking plate 172 of the second locking piece 17 is in abutting fit with the locking part 181 of the traction rod 18, the second locking piece 17 has a clockwise rotation trend under the action force of the first locking piece 14, and the second locking piece 17 maintains a balanced static state under the reaction force applied by the traction rod 18. In this state, the operation mechanism 1 is unlocked by rotating the traction lever 18, the traction lever 18 rotates clockwise, the latch plate 172 of the second latch member 17 is out of contact with the latch portion 181 of the traction lever 18, the reaction force of the traction lever 18 disappears, the balance of the second latch member 17 and the first latch member 14 is broken, the first latch member 14 rotates counterclockwise, the latch portion 131 on the latch lever 13 is out of contact with the latch surface 141 of the first latch member 14, the latch lever 13 rotates clockwise, and the operation mechanism is unlocked.

However, in many cases, there is often the requirement that the actuating mechanism not unlock in the open state of the circuit breaker and in the event of a loss of power or an undervoltage of the undervoltage release. The reason for this can be verified by the following description: before the generator stops, the electric operating mechanism sends a brake-separating instruction to separate the brake (load is disconnected), the generator stops, the undervoltage release loses electricity, the traction rod of the operating mechanism is unlocked, and then in the release state of the circuit breaker, a brake-separating button is required to be pressed firstly, a brake-closing button is pressed after brake separation to realize brake-closing, and the brake-closing operation of the conventional system is complex and time-consuming.

In view of the above-described prior art, there is a need for a rational improvement to the operating mechanisms of existing circuit breakers. To this end, the inventors have advantageously devised that the technical solutions described below are created in this context.

Disclosure of Invention

The utility model aims to provide a locking structure of a breaker operating mechanism, which reasonably reduces the complexity of system closing operation, and realizes that the operating mechanism is still kept in a hasp state when under-voltage strikes a traction rod in a breaking state and does not trip.

The utility model aims at achieving the task that the locking structure of the operating mechanism of the circuit breaker comprises a bracket, a handle lever assembly, a lock catch assembly and a connecting rod mechanism; the handle lever component and the lock catch component are rotatably arranged on the bracket, the lock catch component and the connecting rod mechanism are in snap fit for locking or unlocking the connecting rod mechanism, and the handle lever component rotates to drive the connecting rod mechanism to move so as to realize the switching-on and switching-off of the circuit breaker, and the circuit breaker is characterized in that: the operating mechanism further comprises a transmission mechanism, the transmission mechanism is driven by the handle lever assembly and is switched between a first position and a second position, when the handle lever assembly is in a closing or releasing position, the transmission mechanism is in the first position, the transmission mechanism is separated from the lock catch assembly, and the operating mechanism can be released; when the handle lever assembly is in the opening position, the transmission mechanism is in the second position, and the transmission mechanism acts on the lock catch assembly to enable the lock catch assembly to be kept in the locking position, so that the operating mechanism cannot be tripped.

In a specific embodiment of the utility model, the transmission mechanism is a rigid component and comprises a first transmission piece and a second transmission piece in rotating fit with the first transmission piece, and the handle lever assembly drives the second transmission piece to rotate so as to drive the first transmission piece to rotate and be in abutting fit with the lock catch assembly.

In another specific embodiment of the present utility model, the first transmission member is formed with a first mounting portion, the second transmission member is formed with a second mounting portion concentric with the first mounting portion, and the transmission mechanism is mounted on the operating mechanism through the first mounting portion and the second mounting portion.

In yet another specific embodiment of the present utility model, the handle lever assembly includes an operating handle, a driving part is disposed on the operating handle, a pressing part is disposed on the second transmission member, and the driving part contacts with the pressing part to drive the transmission mechanism to move.

In yet another specific embodiment of the present utility model, the latch assembly includes a first latch member, a second latch member, a drawbar that is snap-fit with the second latch member, the second latch member being in abutting engagement with the first latch member via a second latch member bearing disposed thereon.

In still another specific embodiment of the present utility model, the second locking member is formed with a bent portion, and the first transmission member is formed with a first coupling portion, and the first coupling portion is in abutting fit with the bent portion of the second locking member.

In a further specific embodiment of the present utility model, the link mechanism includes an upper link and a lower link hinged to each other, and a trip lever rotatably mounted on the bracket; the first locking piece is in snap fit with the trip lever and is used for locking or unlocking the trip lever, the upper connecting rod is rotationally connected with the trip lever, and the lower connecting rod is connected with a rotating shaft which drives the moving contact to rotate so as to realize the closing and opening of the circuit breaker.

In a further specific embodiment of the present utility model, the transmission mechanism is an elastic component, the elastic component is a torsion spring, the torsion spring includes a helically arranged spring body, two ends of the spring body are respectively provided with a first torsion arm and a second torsion arm, the spring body is rotatably mounted on the bracket, and when the transmission mechanism is in the second position, the first torsion arm abuts against the handle lever assembly, and the second torsion arm abuts against the second locking piece.

The utility model has the beneficial effects that due to the adoption of the structure, the utility model has the following advantages: when the operating mechanism is in a brake separating state, the operating handle is in a brake separating position, namely the transmission mechanism is in a second position, the trip lever is in lap joint with the first locking piece, and because the driving part arranged on the operating handle is abutted against the pressing part arranged on the second transmission piece, the transmission mechanism exerts auxiliary force on the second locking piece, so that the second locking piece has a anticlockwise rotating trend, the second locking piece keeps balanced and static under the auxiliary force of the first locking piece and the transmission mechanism, the traction rod is pushed at the moment and is not unlocked to release, the operating mechanism still keeps a hasp state, the requirement that the operating mechanism is not unlocked under the conditions of brake separating state and under-voltage release is met, the structure can be completed only by arranging the operating handle in the brake separating position, the complexity of system operation is reasonably reduced, the breaker is still kept in the hasp state when under-voltage strikes the traction rod during the brake separating state, the trip is not generated, and the safety of the breaker is ensured.

Drawings

Fig. 1 is a schematic diagram of a state of a transmission mechanism of an operating mechanism according to the present utility model when the operating mechanism is closed.

Fig. 2 is a schematic diagram of a state of a transmission mechanism of the operating mechanism when the operating mechanism is disconnected.

Fig. 3 is a schematic view of the operation mechanism of the present utility model in a tripped state for re-tripping operation.

Fig. 4 is an exploded view of the assembly of the operating mechanism of the present utility model.

FIG. 5 is a cross-sectional view of the operating mechanism of the present utility model in the open position.

Fig. 6 is an assembly schematic diagram of the second locking member and the transmission mechanism of the operating mechanism according to the present utility model.

Fig. 7 is a schematic diagram showing the cooperation between the second locking member and the traction rod when the operating mechanism is in the opening position.

Fig. 8 is a schematic structural view of a first transmission member of an embodiment of the transmission mechanism according to the present utility model.

Fig. 9 is a schematic structural view of a second transmission member of an embodiment of the transmission mechanism according to the present utility model.

Fig. 10 is a schematic diagram of an assembly structure of another embodiment of the transmission mechanism according to the present utility model.

Fig. 11 is an assembled schematic view of a conventional operating mechanism.

FIG. 12 is a schematic view showing the cooperation of the second locking member and the traction lever when the conventional operating mechanism is in the release position.

Fig. 13 is a cross-sectional view of the prior art operating mechanism in the open position.

In the figure: 1. operating mechanism, 11, bracket, 12, handle lever assembly, 121, handle lever, 122, operating handle, 1221, drive portion, 13, trip lever, 131, snap-on portion, 14, first snap-on member, 141, snap-on face, 142, upper back, 15, upper link, 16, lower link, 17, second snap-on member, 171, second snap-on member bearing, 172, snap-on plate, 173, fold portion, 18, draw bar, 181, snap-on portion, 19, upper and lower link hinge shaft. 2. The first torque arm comprises a transmission mechanism, 21, a first transmission part, 211, a first mounting part, 212, a first connecting part, 2121, an upper end face, 2122, a lower end face, 22, a second transmission part, 221, a second mounting part, 222, a second connecting part, 223, a pressing part, 20, a torsion spring, 20a, a spring body, 20b, a first torque arm and 20c, and a second torque arm. 3. A rotating shaft; 4. a moving contact; 5. a stationary contact; 6. a base; 7. a pivot shaft; 8. a traction rod hinge shaft; 10. and a torsion spring.

Detailed Description

The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.

In the following description, all concepts related to the directions or azimuths of up, down, left, right, front and rear are directed to the position states where the drawings are being described, for the convenience of public understanding, and thus should not be construed as being a particular limitation on the technical solutions provided by the present utility model.

Referring to fig. 1 to 3, the present utility model relates to a locking structure of an operating mechanism of a circuit breaker, in which the specific structure of the circuit breaker is not shown, but the circuit breaker is known to those skilled in the art, and the specific circuit breaker comprises an operating mechanism 1, a base 6, a rotating shaft 3, a moving contact 4 and a fixed contact 5 of a contact system. The operating mechanism 1 is arranged in the base 6, the operating mechanism 1 is provided with a handle lever assembly 12, when the operating mechanism 1 is switched on and off, the handle lever assembly 12 drives the operating mechanism 1 to act, the operating mechanism 1 drives the rotating shaft 3 to act after acting, and the rotating shaft 3 acts to drive the moving contact 4 to rotate so as to realize contact or separation with the fixed contact 5.

The operating mechanism 1 includes a breaking state, a closing state, a releasing state and a re-buckling state, the releasing state refers to that the operating mechanism 1 encounters a fault current under the working condition to cause a release (not shown in the figure) of the circuit breaker to perform long time delay or instantaneous action, an actuating piece on the release (not shown in the figure) drives the operating mechanism 1 to act, the first locking piece 14 unlocks the locking lever 13, the operating mechanism 1 is released, and in the releasing state, in order to enable the operating mechanism 1 to enter the closing state again, the operating mechanism needs to operate the handle lever assembly 12 of the circuit breaker, so that the operating mechanism 1 performs re-buckling action and enters the re-buckling state.

Referring to fig. 4 in combination with fig. 1 to 3, the aforementioned operating mechanism 1 includes a bracket 11, a handle lever assembly 12, a latch assembly, a link mechanism, and a transmission mechanism 2, the operating mechanism 1 is fixed on the circuit breaker base 6 by the bracket 11, the handle lever assembly 12 is rotatably mounted on the bracket 11, and the latch assembly, the link mechanism, and the transmission mechanism 2 are rotatably disposed on the aforementioned bracket 11.

The technical key points of the technical scheme provided by the utility model are as follows: the transmission mechanism 2 is driven by the handle lever assembly 12 and is switched between a first position and a second position, when the handle lever assembly 12 is in a closing or releasing position, the transmission mechanism 2 is in the first position, the transmission mechanism 2 is separated from the lock catch assembly, and the operating mechanism 1 can be released; when the handle lever assembly 12 is in the release position, the transmission mechanism 2 is in the second position, and the transmission mechanism 2 acts on the latch assembly to hold it in the latched position, and the operating mechanism 1 cannot be tripped.

As shown in fig. 4 to 6, the operating mechanism 1 includes a bracket 11, a handle lever assembly 12, a trip lever 13, a first latch member 14, an upper link 15, a lower link 16, a second latch member 17, a traction rod 18, and a torsion spring 10. The handle lever assembly 12 is rotatably erected on the bracket 11, the first locking piece 14 and the trip lever 13 are rotatably arranged on the bracket 11, the traction rod 18 and the second locking piece 17 are rotatably arranged on the bracket 11, the torsion spring 10 is sleeved on the bracket 11, one end of the torsion spring is hung on the bracket 11, the other end of the torsion spring is abutted against the second locking piece 17 to provide restoring force for the second locking piece 17, the traction rod 18 and the second locking piece 17 are in snap fit and used for locking or unlocking the second locking piece 17, the second locking piece 17 is in snap fit with the first locking piece 14 and used for locking or unlocking the first locking piece 14, the first locking piece 14 and the trip lever 13 are in snap fit and used for locking or unlocking the trip lever 13, the upper connecting rod 15 is rotatably connected with the trip lever 13, the upper connecting rod 15 and the lower connecting rod 16 are hinged through the upper connecting rod hinging shaft 19, and the lower connecting rod 16 is connected with the rotating shaft 3 of the circuit breaker, and the moving contact 4 is driven to rotate to realize the circuit breaker to switch on and off. In this embodiment, the link mechanism includes the above-mentioned upper link 15 and lower link 16 hinged to each other, and the trip lever 13 rotatably mounted on the bracket 11; the latch assembly comprises the first latch member 14, the second latch member 17 and the traction rod 18.

As shown in fig. 4, the operating mechanism 1 further includes a pivot shaft 7, and the pivot shaft 7 is mounted on a bracket 11. The second locking piece 17 is hinged on the pivot shaft 7, the torsion spring 10 is sleeved on the pivot shaft 7, one end of the torsion spring is hung on the bracket 11, the other end of the torsion spring abuts against the second locking piece 17, the transmission mechanism 2 is rotatably arranged on the pivot shaft 7, namely, the transmission mechanism 2 is rotatably arranged on the bracket 11 and is positioned on one side of the second locking piece 17. When the operating mechanism 1 moves to the opening position, as shown in fig. 2, the handle lever assembly 12 pushes the transmission mechanism 2 to rotate, and when the operating mechanism 1 moves to the opening position, the handle lever assembly 12 drives the transmission mechanism 2 to reach the second position, and the transmission mechanism 2 abuts against the second locking piece 17 to keep the locking assembly in the locking position, at this time, if the traction rod 18 is actuated to unlock the operating mechanism 1, the operating mechanism 1 is not tripped.

As shown in fig. 4, the handle lever assembly 12 includes a handle lever 121 and an operating handle 122 mounted on the handle lever 121, wherein the operating handle 122 drives the handle lever 121 to rotate so as to drive the operating mechanism 1 to act, thereby realizing the closing and opening of the circuit breaker, and the handle lever 121 rotates and drives the trip lever 13 to rotate anticlockwise.

As shown in fig. 5, the first locking member 14 is formed with a locking surface 141, the trip lever 13 is formed with a locking portion 131, and the locking surface 141 overlaps the locking portion 131 to lock the trip lever 13. The operating mechanism 1 further includes a drawbar hinge shaft 8, and the drawbar 18 is hinged to the bracket 11 through the drawbar hinge shaft 8, so that the drawbar 18 rotates about the drawbar hinge shaft 8 as a rotation center.

As shown in fig. 5 to 7, the second locking member 17 is formed with a locking plate 172, the traction rod 18 is formed with a locking portion 181, and the locking plate 172 is in a snap fit with the locking portion 181, so as to lock or unlock the second locking member 17 by the traction rod 18. The second latch member 17 is provided with a second latch member bearing 171, and when the operating mechanism 1 is in a latch state, as shown in fig. 5 and 6, the torsion spring 10 provides a restoring force to the second latch member 17, and the second latch member 17 is attached to the first latch member 14, that is, the second latch member bearing 171 forms a rolling pair with the upper back surface 142 of the first latch member 14, that is, the second latch member bearing 171 is in rolling fit with the upper back surface 142 of the first latch member 14, and the second latch member 17 is balanced under the reaction force exerted by the first latch member 14 and the traction rod 18. The traction rod 18 is rotated, the locking plate 172 of the second locking piece 17 is separated from contact with the locking part 181 of the traction rod 18, the reaction force of the traction rod 18 disappears, the balance of the second locking piece 17 and the first locking piece 14 is broken, and the second locking piece 17 is unlocked.

The operating mechanism 1 adopts a scheme that the second locking piece 17 is matched with the first locking piece 14, and the first locking piece 14 is locked or unlocked by a secondary locking structure matched with the jump-buckle lever 13. Meanwhile, the operating mechanism 1 can also be locked or unlocked by adopting a primary locking structure, namely, the traction rod 18 is directly matched with the first lock catch 14, and the first lock catch 14 is matched with the trip lever 13 to lock or unlock the operating mechanism 1.

As shown in fig. 4, 6 and 8, the second locking member 17 further includes a bending portion 173 extending away from the traction direction, the transmission mechanism 2 is a rigid member and includes a first transmission member 21, an upper end face 2121 is provided on the first coupling portion 212 of the first transmission member 21, the first transmission member 21 is sleeved on the pivot shaft 7 through a first mounting portion 211 provided thereon, and the upper end face 2121 is in abutting engagement with the bending portion 173.

As shown in fig. 4 to 9, the operating handle 122 is provided with a driving part 1221, the transmission mechanism 2 includes a second transmission member 22 coupled and engaged with the first transmission member 21, a pressing part 223 is provided on the second transmission member 22, the second transmission member 22 is sleeved on the pivot shaft 7 through a second mounting part 221 provided thereon, and a lower end face 2122 of the first transmission member 21 is engaged with a second coupling part 222 protruding and provided on the second transmission member 22. When the operating handle 122 is pushed to move toward the opening position, the driving portion 1221 abuts against the pressing portion 223 and drives the second transmission member 22 to rotate, the second coupling portion 222 on the second transmission member 22 engages with the lower end face 2122 of the first transmission member 21 and drives the first transmission member 21 to rotate, at this time, the upper end face 2121 provided on the first coupling portion 212 of the first transmission member 21 abuts against the bending portion 173 provided on the second locking member 17 and drives the second locking member 17 to rotate counterclockwise, at this time, the transmission mechanism 2 is shifted from the first position to the second position, at this time, the locking plate 172 keeps being locked with the locking portion 181 or is separated from the locked state.

The transmission mechanism 2 adopts the technical scheme that the first transmission member 21 and the second transmission member 22 are combined, and the transmission mechanism 2 can also adopt the technical scheme that the first transmission member 21 and the second transmission member 22 are integrated.

Referring to fig. 10, in another embodiment of the present utility model, the transmission mechanism 2 is a spring component, the elastic component is a torsion spring 20, the torsion spring 20 includes a helically arranged spring body 20a, two ends of the spring body 20a are respectively configured with a first torsion arm 20b and a second torsion arm 20c, the spring body 20a is sleeved on the pivot shaft 7 and is located at one side of the second latch member 17, when the operating handle 122 is pushed to move toward the opening position, the first torsion arm 20b abuts against the driving portion 1221, the second torsion arm 20c abuts against the bending portion 173, the second latch member 17 rotates anticlockwise under the action of the torsion spring force, and the latch plate 172 keeps the latch or separates from the latch state of the latch member 181.

Referring to fig. 4 and 5, and referring to fig. 1, the present utility model adds a transmission mechanism 2 on the basis of the existing operation mechanism. The operating mechanism 1 performs unlocking operation in a closing state, referring to fig. 1, the handle lever 12 is in a closing position, the moving contact 3 contacts the fixed contact 4 under the action of a main spring force, and the hasp portion 131 of the trip lever 13 overlaps with the hasp surface 141 on the first catch piece 14. Under the action of the main spring force of the operating mechanism 1, the trip lever 13 has a clockwise rotation tendency, and the trip lever 13 keeps a balanced and static state under the reaction force applied by the first locking piece 14. The second latch member bearing 171 mounted on the second latch member 17 abuts against the upper back surface 142 of the first latch member 14, and the first latch member 14 tends to rotate counterclockwise under the force of the latch lever 13, and the first latch member 14 maintains a balanced and stationary state under the reaction force applied by the second latch member 17. The traction rod 18 is in a reset state, the latch plate 172 of the second latch member 17 abuts against the latch portion 181 of the traction rod 18, the second latch member 17 tends to rotate clockwise under the force of the first latch member 14, and the second latch member 17 maintains a balanced and stationary state under the reaction force applied by the traction rod 18.

The traction rod 18 is triggered to unlock the operating mechanism 1, the traction rod 18 rotates clockwise, the locking plate 172 of the second locking piece 17 is separated from contact with the locking part 181 of the traction rod 18, the reaction force of the traction rod 18 disappears, the balance of the second locking piece 17 and the first locking piece 14 is broken, the first locking piece 14 rotates anticlockwise, the locking part 131 on the locking lever 13 is separated from contact with the locking surface 141 of the first locking piece 14, the locking lever 13 rotates clockwise, and the operating mechanism 1 is unlocked and tripped, namely the transmission mechanism 2 is in the first position.

With continued reference to fig. 4 and 5, and with reference to fig. 3, the operating mechanism 1 performs a rebuckling operation in the tripped state, referring to fig. 3, the operating handle 122 of the circuit breaker is turned to drive the handle lever 121 to rotate, the handle lever 121 drives the trip lever 13 to rotate anticlockwise, the hasp portion 131 of the trip lever 13 moves downwards to contact with the hasp surface 141 on the first latch member 14 to drive the first latch member 14 to rotate anticlockwise, and meanwhile, the second latch member 17 rotates clockwise under the action of the torsion spring 10 until the hasp portion 131 of the trip lever 13 is in hasp with the hasp surface 141 of the first latch member 14, and under the action of the main spring force, the trip lever 13 has a clockwise rotation trend, and the trip lever 13 maintains a balanced and static state under the reaction force exerted by the first latch member 14. The second latch member bearing 171 mounted on the second latch member 17 abuts against the upper back surface 142 of the first latch member 14, and the first latch member 14 tends to rotate counterclockwise under the force of the latch lever 13, and the first latch member 14 maintains a balanced and stationary state under the reaction force applied by the second latch member 17.

At this time, the driving part 1221 disposed on the operating handle 122 abuts against the pressing part 223 disposed on the second transmission member 22 and drives the second transmission member 22 to rotate, the second transmission member 22 is provided with the second coupling part 222, the second coupling part 222 is engaged with the lower end face 2122 of the first transmission member 21 and drives the first transmission member 21 to rotate, at this time, the upper end face 2121 disposed on the first transmission member 21 abuts against the bending part 173 disposed on the second locking member 17 and drives the second locking member 17 to rotate counterclockwise, at this time, the locking plate 172 keeps the locking with the locking part 181 or separates from the locked state, the operating mechanism 1 completes the re-locking operation, and the operating mechanism 1, that is, the transmission mechanism 2 is in the second position. Preferably, the driving part 1221 has an arc surface structure, and the transmission mechanism 2 is maintained at the second position when the operating mechanism 1 moves from the opening position to the re-locking position.

With continued reference to fig. 4 and 5, and with reference to fig. 2, the operating mechanism 1 performs an unlocking operation in a brake-off state, referring to fig. 2, the operating handle 122 is in a brake-off position, the moving contact 4 and the fixed contact 5 are separated from contact under the action of a main spring force, and return to the brake-off state, the trip lever 13 is in a snap-on state, the snap-on portion 131 of the trip lever 13 is in overlap joint with the snap-on surface 141 of the first latch member 14, the trip lever 13 has a clockwise rotation tendency under the action of the main tension spring force, and the trip lever 13 maintains a balanced and stationary state under the reaction force applied by the first latch member 14. The second latch member bearing 171 mounted on the second latch member 17 abuts against the upper back surface 142 of the first latch member 14, and the first latch member 14 tends to rotate counterclockwise under the action of the latch lever 13, and the first latch member 14 maintains a balanced and stationary state under the reaction force applied by the second latch member 17. The traction rod 18 is in a reset state, the second locking piece 17 is in abutting fit with the traction rod 18, the locking plate 172 is kept locked with the locking part 181 or separated from the locked state, if the traction rod 18 is pushed to unlock at the moment, the driving part 1221 arranged on the operating handle 122 is continuously abutted with the pressing part 223 arranged on the second transmission piece 22, the transmission mechanism 2 applies auxiliary force to the second locking piece 17, so that the second locking piece 17 has a counterclockwise rotation trend, the second locking piece 17 is continuously kept balanced and still under the auxiliary force of the first locking piece 14 and the transmission mechanism 2, the operating mechanism still keeps the locked state, the traction rod 18 is pushed to be unlocked and released, the requirement that the operating mechanism is not unlocked under the condition of the breaking state and the under-voltage release is met, the structure can be completed only by arranging the operating handle 122 at the breaking position, and the complexity of system operation is reduced to a certain extent.

Claims (8)

1. A locking structure of a breaker operating mechanism, wherein the operating mechanism (1) comprises a bracket (11), a handle lever assembly (12), a lock catch assembly and a connecting rod mechanism; the handle lever assembly (12) and the lock catch assembly are rotatably arranged on the support (11), the lock catch assembly is in snap fit with the connecting rod mechanism and used for locking or unlocking the connecting rod mechanism, and the handle lever assembly (12) rotates to drive the connecting rod mechanism to move so as to realize the switching-on and switching-off of the circuit breaker, and the circuit breaker is characterized in that: the operating mechanism (1) further comprises a transmission mechanism (2), the transmission mechanism (2) is driven by the handle lever assembly (12) and is switched between a first position and a second position, when the handle lever assembly (12) is in a closing or tripping position, the transmission mechanism (2) is in the first position, the transmission mechanism (2) is separated from the locking assembly, and the operating mechanism (1) can be tripped; when the handle lever assembly (12) is in the opening position, the transmission mechanism (2) is in the second position, the transmission mechanism (2) acts on the lock catch assembly to enable the lock catch assembly to be kept in the locking position, and the operating mechanism (1) cannot be tripped.

2. The locking structure of a circuit breaker operating mechanism of claim 1, wherein: the transmission mechanism (2) is a rigid part and comprises a first transmission part (21) and a second transmission part (22) in rotary fit with the first transmission part (21), and the handle lever assembly (12) drives the second transmission part (22) to rotate so as to drive the first transmission part (21) to rotate and be in abutting fit with the lock catch assembly.

3. The locking structure of a circuit breaker operating mechanism according to claim 2, wherein: the first transmission member (21) is provided with a first mounting part (211), the second transmission member (22) is provided with a second mounting part (221) concentric with the first mounting part (211), and the transmission mechanism (2) is mounted on the operating mechanism (1) through the first mounting part (211) and the second mounting part (221).

4. A locking structure of a circuit breaker operating mechanism according to claim 3, wherein: the handle lever assembly (12) comprises an operating handle (122), a driving part (1221) is arranged on the operating handle (122), a pressing part (223) is arranged on the second transmission piece (22), and the driving part (1221) is contacted with the pressing part (223) to drive the transmission mechanism (2) to move.

5. The locking structure of a circuit breaker operating mechanism according to claim 2, wherein: the lock catch assembly comprises a first lock catch piece (14), a second lock catch piece (17) and a traction rod (18), wherein the traction rod (18) is in snap fit with the second lock catch piece (17), and the second lock catch piece (17) is in abutting fit with the first lock catch piece (14) through a second lock catch piece bearing (171) arranged on the second lock catch piece.

6. The circuit breaker operating mechanism locking structure of claim 5 wherein: the second locking piece (17) is provided with a bending part (173), the first transmission piece (21) is provided with a first connecting part (212), and the first connecting part (212) is in abutting fit with the bending part (173) of the second locking piece (17).

7. The circuit breaker operating mechanism locking structure of claim 5 wherein: the connecting rod mechanism comprises an upper connecting rod (15) and a lower connecting rod (16) which are hinged with each other, and a jump button lever (13) rotatably arranged on the bracket (11); the first locking piece (14) is in snap fit with the trip lever (13) and is used for locking or unlocking the trip lever (13), the upper connecting rod (15) is rotationally connected with the trip lever (13), and the lower connecting rod (16) is connected with a rotating shaft (3) for driving the moving contact to rotate to realize the closing and opening of the circuit breaker.

8. The locking structure of a circuit breaker operating mechanism of claim 1, wherein: the transmission mechanism (2) be elastomeric element, elastomeric element is torsional spring (20), torsional spring (20) include the spring body (20 a) of spiral setting, spring body (20 a) both ends have constituted respectively and have first torsion arm (20 b) and second torsion arm (20 c), spring body (20 a) rotationally install on support (11), when transmission mechanism (2) are in the second position, first torsion arm (20 b) support with handle lever subassembly (12), second torsion arm (20 c) support with second latch member (17).