CN112038187A

CN112038187A - Circuit breaker

Info

Publication number: CN112038187A
Application number: CN202010767267.9A
Authority: CN
Inventors: 卢科军; 杨安; 顾斌斌; 顾翔翼
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2020-12-04

Abstract

The invention relates to the field of low-voltage electrical appliances, in particular to a circuit breaker, wherein a button mechanism is in driving connection with an operating mechanism, an electric operating device is in driving fit with the operating mechanism, and the operating mechanism is in driving connection with a moving contact; the electric operating device comprises a motor, a transmission gear set, a driving gear piece and an output gear; the drive gear member includes a first helical stepped tooth portion; the operating mechanism comprises a transmission piece, an output gear is coaxially linked with the transmission piece, and the output gear comprises a second spiral stepped tooth part; one of the first spiral stepped tooth part and the second spiral stepped tooth part is of a forward spiral stepped structure, and the other one is of an inverted spiral stepped structure; the first spiral stepped tooth part is in driving fit with the second spiral stepped tooth part, and the driving transmission part is driven to rotate towards the closing direction, so that the circuit breaker is closed; the circuit breaker has reliable work, and the electric operating device does not influence manual operation.

Description

Circuit breaker

Technical Field

The invention relates to the field of low-voltage electrical appliances, in particular to a circuit breaker.

Background

In the existing partial automatic reclosing miniature circuit breaker, a single chip of a control circuit board can control the position of a gear mechanism of an electric operating device and the rotation direction of a motor; there are some existing automatic reclosing miniature circuit breakers, in which a control circuit board is not provided with a single chip to control an electric operation device, and a motor always rotates in one direction to complete closing/opening operation.

The existing automatic reclosing miniature circuit breaker has the disadvantages that the manual operation closing function can not be realized normally when the automatic reclosing process meets the accident condition of sudden power failure or failure of an electric operation transmission mechanism, certain potential safety hazards are possessed, and troubles are caused to operators.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a circuit breaker which is reliable in operation and does not influence manual operation by an electric operating device.

In order to achieve the purpose, the invention adopts the following technical scheme:

a circuit breaker comprises a circuit breaker shell 4, a button mechanism 1, an operating mechanism 2, an electric operating device 3, a moving contact 80 and a static contact 81, wherein the button mechanism, the operating mechanism 2, the moving contact 80 and the static contact 81 are respectively arranged in the circuit breaker shell 4; the button mechanism 1 is in driving connection with the operating mechanism 2, the electric operating device 3 is in driving fit with the operating mechanism 2, and the operating mechanism 2 is in driving connection with the moving contact 80; the electric operating device 3 comprises a motor 3a, a transmission gear set, a driving gear piece 3e and an output gear in driving fit with the driving gear piece 3e, wherein the motor 3a, the transmission gear set and the driving gear piece 3e are sequentially connected in a driving way; the drive gear member 3e includes a first helical stepped tooth portion 3 e-2; the operating mechanism 2 comprises a transmission piece 2a which is pivotally arranged on the breaker shell 4 and is in driving connection with the button mechanism 1, an output gear is coaxially linked with the transmission piece 2a, and the output gear comprises a second spiral stepped tooth part 2 a-3; one of the first spiral stepped tooth part 3e-2 and the second spiral stepped tooth part 2a-3 is of a forward spiral stepped structure, and the other one is of an inverted spiral stepped structure; the first spiral stepped tooth part 3e-2 is in driving fit with the second spiral stepped tooth part 2a-3, and the driving transmission part 2a is driven to rotate towards the closing direction, so that the circuit breaker is closed.

Preferably, the first spiral stepped tooth portion 3e-2 and the second spiral stepped tooth portion 2a-3 include the same number of teeth, and when the first spiral stepped tooth portion 3e-2 drives the transmission member 2a to rotate in the closing direction by the second spiral stepped tooth portion 2a-3, the teeth of the first spiral stepped tooth portion 3e-2 are sequentially in driving engagement with and disengaged from the teeth of the second spiral stepped tooth portion 2 a-3.

Preferably, the first helical stepped tooth portion 3e-2 has a forward helical stepped structure, and the second helical stepped tooth portion 2a-3 has an inverted helical stepped structure.

Preferably, the transmission piece 2a and the output gear are of an integral structure, the transmission piece 2a comprises a transmission piece main body 2a-0 which is pivotally arranged on the breaker housing 4, and the second spiral stepped tooth part 2a-3 is arranged on a radial side wall of the transmission piece main body 2 a-0.

Preferably, the button mechanism 1 is pressed/pulled to drive the transmission piece 2a to rotate towards the closing direction/opening direction, so that the circuit breaker is closed/opened; the electric operating device 3 drives the transmission piece 2a to rotate towards the closing direction through the output gear, so that the circuit breaker is closed; the electric operating device 3 drives the transmission piece 2a to rotate towards the opening direction through the button mechanism 1, so that the breaker is opened; the closing direction and the opening direction are opposite.

Preferably, the driving gear member 3e further comprises a button driving tooth portion 3e-1c coaxially disposed with the first spiral stepped tooth portion 3e-2, and the button driving tooth portion 3e-1c is in driving engagement with the button mechanism 1.

Preferably, the driving gear part 3e further comprises a gear part driven gear 3e-0, a gear part driving column 3e-1 and a button driving tooth part 3e-1c, the gear part driven gear 3e-0 is meshed with the transmission gear set, the gear part driving column 3e-1 is arranged on one side of the gear part driven gear 3e-0 and coaxially linked with the gear part driven gear 3e-0, a first spiral stepped tooth part 3e-2 is arranged on a radial side wall of the gear part driving column 3e-1, one end of the button driving tooth part 3e-1c is connected with a side wall of the first spiral stepped tooth part 3e-2, and one side of the button driving tooth part 3e-1 is connected with the gear part driven gear 3 e-0.

Preferably, the driving gear member 3e is of an integral structure; the button actuation teeth 3e-1c comprise a tooth which is in driving engagement with the button mechanism 1.

Preferably, when the electric operation device 3 drives the circuit breaker to close or open the circuit breaker by the operation mechanism 2, the driving gear member 3e always rotates in the same direction.

Preferably, the operating mechanism 2 further includes a driving member return spring 2f, and the driving member return spring 2f applies an urging force to the driving member 2a to rotate the driving member 2a in the opening direction.

Preferably, the operating mechanism 2 further includes a transmission link 2b, a rotating plate 2d, a locking piece 2c and a trip piece 2e, the rotating plate 2d is pivotally disposed on the circuit breaker housing 4, the locking piece 2c and the trip piece 2e are respectively pivotally disposed on the rotating plate 2d, the button mechanism 1 is drivingly connected to the locking piece 2c through the transmission link 2b, and the rotating plate 2d is drivingly connected to the movable contact 80.

Preferably, the button mechanism 1 comprises a button member 1a, a first connecting rod 1b, a connecting member 1c and a second connecting rod 1d which are sequentially connected in a driving manner, the button member 1a and the connecting member 1c are arranged on the breaker shell 4 in a sliding manner, the connecting member 1c is connected with a transmission member 2a in a driving manner through the second connecting rod 1d, and the button member 1 is pressed/pulled to drive the transmission member 2 to rotate towards a closing direction/opening direction, so that the circuit breaker is closed/opened; the driving gear member 3e of the electric operating device 3 is in driving engagement with the connecting member 1 c.

Preferably, the transmission gear set further comprises a worm 3b, a first transmission gear 3c and a second transmission gear 3d which are sequentially meshed, the worm 3b is in driving connection with the motor 3a, the first transmission gear 3c and the second transmission gear 3d are respectively arranged on the circuit breaker shell 4 in a pivoting mode, and the second transmission gear 3d is further meshed with the driving gear piece 3 e.

According to the circuit breaker, the driving gear piece 3e of the electric operating device 3 comprises the first spiral stepped tooth part 3e-2, the output gear coaxially linked with the transmission piece 2a of the operating mechanism 2 comprises the second spiral stepped tooth part 2a-3, the first spiral stepped tooth part 3e-2 is in driving fit with the second spiral stepped tooth part 2a-3, the driving transmission piece 2a rotates towards the closing direction, if power failure or transmission failure occurs in the automatic closing process, when a user drives the transmission piece 2a to rotate through the button mechanism 1, the second spiral stepped tooth part 2a-3 can be separated from the first spiral stepped tooth part 3e-2, the circuit breaker can still complete closing through manual operation, and normal use of the circuit breaker is guaranteed.

Drawings

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

FIG. 2 is a schematic view of the structure of the electric operating device of the present invention cooperating with the driving member of the operating mechanism and the connecting member of the button mechanism, respectively;

FIG. 3 is a schematic structural view of the drive gear member of the present invention;

FIG. 4 is a schematic view of the construction of the transmission member of the present invention;

FIG. 5 is a schematic view of the engagement of the driving member and the return spring of the driving member according to the present invention;

FIG. 6 is a schematic view of the driving gear and the transmission member of the present invention, wherein the circuit breaker is in an open state;

fig. 7 is a schematic structural diagram of the circuit breaker of the present invention, the circuit breaker being in a closing state;

fig. 8 is a schematic structural diagram of the circuit breaker according to the present invention, wherein the circuit breaker is in a closing process.

Detailed Description

The following description will further describe embodiments of the circuit breaker of the present invention with reference to the embodiments shown in fig. 1 to 8. The circuit breaker of the present invention is not limited to the description of the following embodiments.

The circuit breaker comprises a circuit breaker shell 4, a button mechanism 1, an operating mechanism 2, an electric operating device 3, a moving contact 80 and a static contact 81, wherein the button mechanism, the operating mechanism 2 and the electric operating device are respectively arranged in the circuit breaker shell 4; the button mechanism 1 is in driving connection with the operating mechanism 2, the electric operating device 3 is in driving fit with the operating mechanism 2, and the operating mechanism 2 is in driving connection with the moving contact 80; the electric operating device 3 comprises a motor 3a, a transmission gear set, a driving gear piece 3e and an output gear in driving fit with the driving gear piece 3e, wherein the motor 3a, the transmission gear set and the driving gear piece 3e are sequentially connected in a driving way; the drive gear member 3e includes a first helical stepped tooth portion 3 e-2; the operating mechanism 2 comprises a transmission piece 2a which is pivotally arranged on the breaker shell 4 and is in driving connection with the button mechanism 1, an output gear is coaxially linked with the transmission piece 2a, and the output gear comprises a second spiral stepped tooth part 2 a-3; one of the first spiral stepped tooth part 3d-2 and the second spiral stepped tooth part 2a-3 is of a forward spiral stepped structure, and the other one is of an inverted spiral stepped structure; the first spiral stepped tooth part 3a-2 is in driving fit with the second spiral stepped tooth part 2a-3, and the driving transmission part 2a is driven to rotate towards the closing direction, so that the circuit breaker is closed. According to the circuit breaker, the driving gear piece 3e of the electric operating device 3 comprises the first spiral stepped tooth part 3e-2, the output gear coaxially linked with the transmission piece 2a of the operating mechanism 2 comprises the second spiral stepped tooth part 2a-3, the first spiral stepped tooth part 3e-2 is in driving fit with the second spiral stepped tooth part 2a-3, the driving transmission piece 2a rotates towards the closing direction, if power failure or transmission failure occurs in the automatic closing process, when a user drives the transmission piece 2a to rotate through the button mechanism 1, the second spiral stepped tooth part 2a-3 can be separated from the first spiral stepped tooth part 3e-2, the circuit breaker can still complete closing through manual operation, and normal use of the circuit breaker is guaranteed.

Preferably, as shown in fig. 3 to 6, the first spiral stepped tooth portion 3e-2 and the second spiral stepped tooth portion 2a-3 include the same number of teeth, and when the first spiral stepped tooth portion 3e-2 rotates in the closing direction by the second spiral stepped tooth portion 2a-3 driving transmission member 2a, the teeth of the first spiral stepped tooth portion 3e-2 are sequentially brought into driving engagement with and disengaged from the teeth of the second spiral stepped tooth portion 2 a-3. Further, as shown in fig. 6, the first helical stepped tooth portion 3e-2 has a forward helical stepped structure, and the second helical stepped tooth portion 2a-3 has an inverted helical stepped tooth portion.

Preferably, as shown in fig. 1, 7 and 8, the button mechanism 1 is pressed/pulled to drive the transmission member 2a to rotate in the closing/opening direction, so as to close/open the circuit breaker; the electric operating device 3 drives the transmission piece 2a to rotate towards the opening direction through the button mechanism 1, so that the breaker is opened. Further, as shown in fig. 1, 7 and 8, when the electric operating device 3 drives the circuit breaker to close or open via the operating mechanism 2, the driving gear member 3e always rotates in the same direction. According to the circuit breaker, the electric operating device 3 drives the transmission piece 2a to rotate towards the closing direction, if power failure or transmission fault occurs in the closing process, a user can manually press the button mechanism 1, the button mechanism 1 drives the transmission piece 2a to continuously rotate towards the closing direction, so that the circuit breaker completes the closing operation, the electric operating device 3 cannot influence the manual operation of the user, and the normal use of the circuit breaker is guaranteed. Furthermore, the electric operating device 3a drives the transmission part 2a to rotate towards the opening direction through the button mechanism 1, in the opening process, if power failure or transmission fault occurs, a user can manually pull the button mechanism 1, the transmission part 2a is driven to continue rotating towards the opening direction through the button mechanism 1, the circuit breaker is enabled to complete opening operation, manual operation of the user cannot be affected by the electric operating device 3, and normal use of the circuit breaker is guaranteed.

The circuit breaker of the present invention will be further described with reference to the drawings and the specific embodiments.

Fig. 1, 7 and 8 show an embodiment of the circuit breaker according to the present invention.

As shown in fig. 1, 7 and 8, the circuit breaker of the present invention includes a circuit breaker housing 4, and a button mechanism 1, an operating mechanism 2, an electric operating device 3, a moving contact 80 and a static contact 81 which are respectively disposed in the circuit breaker housing 4; the button mechanism 1 is in driving connection with the operating mechanism 2, the electric operating device 3 is in driving fit with the operating mechanism 2, and the operating mechanism 2 is in driving connection with the moving contact 80; the button mechanism 1 and the electric operating device 3 can enable the breaker to be switched on/off through the operating mechanism 2.

It should be noted that, according to actual needs, the circuit breaker of the present invention may further be selectively provided with a short-circuit protection mechanism 5, an overload protection mechanism 7 and an arc extinguishing chamber 6; the short-circuit protection mechanism 5 and the overload protection mechanism 7 are respectively matched with the operating mechanism 2 in a driving way, and when the breaker has a short-circuit fault or an overload fault, the breaker is switched off or tripped; the arc extinguish chamber 6 is used in cooperation with the movable contact 80 and the fixed contact 81 and is used for extinguishing electric arcs generated when the movable contact 80 and the fixed contact 81 are closed or disconnected.

An important improvement of the circuit breaker of the invention lies in the manner of cooperation of the electrically operated device 3 with the operating mechanism 2, in particular:

as shown in fig. 1-6, the electric operating device 3 includes a motor 3a, a transmission gear set and a driving gear member 3e which are connected in a driving manner in sequence, and an output gear which is in driving fit with the driving gear member 3 e; the drive gear member 3e includes a first helical stepped tooth portion 3 e-2; the operating mechanism 2 comprises a transmission piece 2a which is pivotally arranged on the breaker shell 4 and is in driving connection with the button mechanism 1, an output gear is coaxially linked with the transmission piece 2a, and the output gear comprises a second spiral stepped tooth part 2 a-3; one of the first spiral stepped tooth part 3e-2 and the second spiral stepped tooth part 2a-3 is of a forward spiral stepped structure, and the other one is of an inverted spiral stepped structure; the first spiral stepped tooth part 3e-2 is in driving fit with the second spiral stepped tooth part 2a-3, and the driving transmission part 2a is driven to rotate towards the closing direction, so that the circuit breaker is closed.

Preferably, as shown in fig. 3, 4 and 6, the first spiral stepped tooth portion 3e-2 and the second spiral stepped tooth portion 2a-3 include the same number of teeth, and when the first spiral stepped tooth portion 3e-2 drives the transmission member 2a to rotate in the closing direction by the second spiral stepped tooth portion 2a-3, the teeth of the first spiral stepped tooth portion 3e-2 are sequentially brought into driving engagement with and disengaged from the teeth of the second spiral stepped tooth portion 2 a-3. Further, as shown in fig. 1 and 6, the first helical stepped tooth portion 3e-2 has a forward helical stepped structure, and the second helical stepped tooth portion 2a-3 has an inverted helical stepped structure.

Preferably, as shown in fig. 3 and 6, the first helical stepped tooth portion 3e-2 is a forward helical stepped structure, and includes a first driving tooth 3e-26, a second driving tooth 3e-25, a third driving tooth 3e-24, a fourth driving tooth 3e-23, a fifth driving tooth 3e-22 and a sixth driving tooth 3e-21 which are sequentially arranged in a descending manner; as shown in fig. 4 and 6, the second spiral stepped tooth portion 2a-3 is an inverted spiral stepped structure, and includes a first driven tooth 2a-31, a second driven tooth 2a-32, a third driven tooth 2a-33, a fourth driven tooth 2a-34, a fifth driven tooth 2a-35, and a sixth driven tooth 2a-36, which are sequentially arranged in an upgraded manner; the first driving teeth 3e-26, the second driving teeth 3e-25, the third driving teeth 3e-24, the fourth driving teeth 3e-23, the fifth driving teeth 3e-22 and the sixth driving teeth 3e-21 are respectively in driving fit and separation with the first driven teeth 2a-31, the second driven teeth 2a-32, the third driven teeth 2a-33, the fourth driven teeth 2a-34, the fifth driven teeth 2a-35 and the sixth driven teeth 2a-36 in sequence, and the driving transmission piece 2a rotates towards the closing direction to enable the circuit breaker to be closed. Specifically, as shown in fig. 6, when the driving gear member 3e rotates in the closing direction through the output gear driving transmission member 2a, the first driving teeth 3e-26 are first in driving fit with the first driven teeth 2a-31, so that after the driving transmission member 2a rotates by a certain angle, the second driving teeth 3e-25 start to be in driving fit with the second driven teeth 2a-32, and the first driving teeth 3e-26 are separated from the first driven teeth 2a-31, and so on, that is, the teeth of the first spiral gear portion 3e-2 are sequentially in driving fit and separated from the second spiral stepped gear portion 2 a-3; as shown in fig. 8, in the automatic reclosing process of the circuit breaker of the present invention, if a power failure or a transmission failure occurs, the movable contact 80 cannot be closed with the fixed contact 81, the circuit breaker does not complete the closing, at this time, a certain driving tooth of the first spiral stepped tooth portion 3e-2 is in driving fit with a corresponding driven tooth of the second spiral stepped tooth portion 2a-3, and at this time, the driving member 2a is driven by the button mechanism 1 to rotate in the closing direction, as shown in fig. 6, it can be seen that the remaining driven teeth of the second spiral stepped tooth portion 2a-3 do not contact with the driving teeth of the first spiral stepped tooth portion 3e-2 currently in driving fit with the second spiral stepped tooth portion 2a-3, so that a user can complete the closing operation of the circuit breaker by using the button mechanism 1 in a manual manner, and the normal use of the circuit breaker.

Preferably, as shown in fig. 1, 2, 7 and 8, the button mechanism 1 is pressed/pulled to drive the transmission member 2a to rotate in the closing/opening direction, so as to close/open the circuit breaker; the electric operating device 3 drives the transmission piece 2a to rotate towards the closing direction through the output gear, so that the circuit breaker is closed; the electric operating device 3 drives the transmission piece 2a to rotate towards the opening direction through the button mechanism 1, so that the breaker is opened; the closing direction and the opening direction are opposite. Specifically, as shown in fig. 1, the closing direction is a clockwise direction, and the opening direction is a counterclockwise direction.

Preferably, as shown in fig. 1, 2, 7 and 8, when the electric operating device 3 drives the circuit breaker to close or open via the operating mechanism 2, the driving gear member 3e always rotates in the same direction. Specifically, the driving gear member 3e always rotates counterclockwise as viewed in fig. 1.

Preferably, as shown in fig. 2, the driving gear member 3e further comprises a button driving tooth 3e-1c coaxially disposed with the first helical stepped tooth 3e-2, the button driving tooth 3e-1c being in driving engagement with the button mechanism 1. Further, as shown in FIGS. 3 and 6, the button actuation teeth 3e-1c comprise a tooth that drivingly engages the button mechanism 1.

Preferably, as shown in fig. 3 and 6, is an embodiment of the driving gear member 3 e: the driving gear piece 3e comprises a first spiral stepped tooth portion 3e-2, a gear piece driven gear 3e-0, a gear piece driving column 3e-1 and a button driving tooth portion 3e-1c, the gear piece driven gear 3e-0 is meshed with the transmission gear set, the gear piece driving column 3e-1 is arranged on one side of the gear piece driven gear 3e-0 and is in coaxial linkage with the gear piece driven gear 3e-0, the first spiral stepped tooth portion 3e-2 is arranged on the radial side wall of the gear piece driving column 3e-1, one end of the button driving tooth portion 3e-1c is connected with the side wall of the first spiral stepped tooth portion 3e-2, and one side of the button driving tooth portion 3e-1c is connected with the gear piece driven gear 3 e-0. Further, as shown in fig. 3 and 6, the driving gear piece 3e is an integral member.

Preferably, as shown in fig. 1, the transmission gear set of the electric operating device 3 further includes a worm 3b, a first transmission gear 3c and a second transmission gear 3d which are sequentially engaged, the worm 3b is in driving connection with the motor 3a, the first transmission gear 3c and the second transmission gear 3c are respectively and pivotally arranged on the circuit breaker housing 4, and the second transmission gear 3d is further engaged with the driving gear member 3 e. Further, as shown in fig. 2, the second transmission gear 3d is meshed with a gear piece driven gear 3e-0 of the driving gear piece 3 e.

Preferably, as shown in fig. 2, 4, 5 and 6, the output gear and the transmission member 2a are of an integral structure, specifically: the transmission piece 2a includes a transmission piece body 2a-0, and the second spiral stepped tooth portion 2a-3 is provided on a radial side wall of the transmission piece body 2 a-0.

Preferably, as shown in fig. 5, the operating mechanism 2 further includes a driving member return spring 2f, and the driving member return spring 2f applies a force to the driving member 2a to rotate the driving member 2a in the opening direction. Further, as shown in fig. 4 and 5, one end of the driving member 2a is provided with a return spring assembly groove 2a-01, the button return spring 2f is a torsion spring, a spring ring of the torsion spring is arranged in the return spring assembly groove 2a-01, one spring arm is in limit fit with the driving member 2a, and the other spring arm is in limit fit with the circuit breaker housing 4.

Preferably, as shown in fig. 1, is an embodiment of the operating mechanism 2: the operating mechanism 2 comprises a transmission part 2a, a transmission connecting rod 2b, a lock catch part 2c, a rotating plate 2d and a trip part 2e, the transmission part 2a and the rotating plate 2d are respectively pivoted on the breaker shell 4, the lock catch part 2c and the trip part 2e are respectively pivoted on the rotating plate 2d, the transmission part 2a is in driving connection with the lock catch part 2c through the transmission connecting rod 2b, and the rotating plate 2d is in driving connection with the moving contact 80.

Preferably, as shown in fig. 1, 7 and 8, the button mechanism 1 is an embodiment, specifically: the button mechanism 1 comprises a button part 1a, a first connecting rod 1b, a connecting part 1c and a second connecting rod 1d which are sequentially connected in a driving mode, the button part 1a and the connecting part 1c are arranged on the circuit breaker shell 4 in a sliding mode, the connecting part 1c is connected with a transmission part 2a in a driving mode through the second connecting rod 1d, and the button part 1 is pressed/pulled to drive the transmission part 2a to rotate towards the closing direction/opening direction, so that the circuit breaker is closed/opened. Preferably, as shown in fig. 2, the driving gear member 3e of the electric operating device 3 is in driving engagement with the connecting member 1 c.

Preferably, as shown in fig. 1, the circuit breaker of the present invention further includes a locking mechanism, one end of the locking mechanism is a locking mechanism driven end protruding outside the circuit breaker housing 1, and the other end is a locking mechanism mating end cooperating with the button member 1a or the first link 1 b.

One embodiment of the locking mechanism is: the circuit breaker of the embodiment is an insertion type circuit breaker, and is inserted into a circuit breaker assembly position arranged on a cabinet, the locking mechanism is matched with the button mechanism 1 and a shell of the circuit breaker assembly position, so that the circuit breaker is locked and unlocked after being arranged on the circuit breaker assembly position, and/or the circuit breaker is prevented from being not arranged in place, and/or the circuit breaker is prevented from being arranged on the circuit breaker assembly position or being pulled out of the circuit breaker assembly position in a closing state, and/or the circuit breaker is prevented from being closed when not arranged on the circuit breaker assembly position.

Another embodiment of the locking mechanism is: the locking mechanism comprises a cabinet, a circuit breaker assembly position of the cabinet is correspondingly provided with a locking hole matched with a locking mechanism driven end, after the circuit breaker is installed in place, the locking mechanism driven end of the locking mechanism protrudes out of the outer portion of a circuit breaker shell 4 and protrudes into the cabinet locking hole, the circuit breaker is prevented from being pulled out of the cabinet at will, a button piece 1a is pulled, the button piece 1a or a first connecting rod 1b or a connecting piece 204 can drive the locking mechanism matching end to enable the locking mechanism driven end to retract into the circuit breaker shell 1, and therefore the circuit breaker can be pulled out of the circuit breaker assembly position.

A third embodiment of the locking mechanism is: when the circuit breaker is not installed to the circuit breaker assembly position, the driven end of the locking mechanism is extruded by the cabinet wall to be retracted into the circuit breaker shell 4, and the matching end of the locking mechanism is in limit fit with the button piece 1a or the first connecting rod 1b or the connecting piece 1c, so that the button piece 1a is prevented from moving towards the closing direction and cannot be closed when the circuit breaker is not installed to the circuit breaker assembly position; when the circuit breaker is installed in the circuit breaker assembly position, the driven end of the locking mechanism is not squeezed by the shell of the circuit breaker assembly position to move towards the outside of the circuit breaker shell 4, the matching end of the locking mechanism is enabled to be released from limiting matching with the button piece 1a or the first connecting rod 1b or the connecting piece 1c, and the button piece 1a can move towards the closing direction and enables the circuit breaker to be closed through the operating mechanism 2.

It should be noted that the button member 1a, the first link 1b, and the connecting member 1c of the button mechanism 1 may also be designed as an integral component, thereby reducing the number of parts. In order to facilitate the ease of cooperation of the button mechanism 1 with other mechanisms without affecting the cooperation with the electric mechanism 2, the button mechanism 1 of the present invention is preferably an assembly of a button member 1a, a first link 1b, a connecting member 1c and a second link 1c, facilitating the simultaneous cooperation of the button mechanism 2 with the locking mechanism and the electric operation device 3, respectively.

The switching-on/switching-off process of the circuit breaker of the invention is described below with reference to the attached drawings of the specification:

as shown in fig. 1, the circuit breaker of the present invention is in the open state (the moving contact 80 and the static contact 81 are disconnected), the driving gear member 3e of the electric operating device 3 is located at the initial position, and the first spiral stepped tooth portion 3e-2 of the driving gear member 3e is not meshed with the second spiral stepped tooth portion 2a-3 of the output gear; after the electric operating device 3 receives a closing signal, the driving gear part 3e rotates and drives the first spiral stepped tooth part 3e-2 to rotate to be meshed with the second spiral stepped tooth part 2a-3, the driving gear part 3e continues to rotate, the transmission part 2a is driven by the output gear to rotate towards the closing direction, after the circuit breaker is closed, the driving gear part 3e drives the first spiral stepped tooth part 3e-2 to be disengaged from the second spiral stepped tooth part 2a-3 and then stops, the driving gear part 3e reaches the middle position, and the circuit breaker enters the state shown in fig. 7; as shown in fig. 7, when the circuit breaker of the present invention is in a closing state (the movable contact 80 and the fixed contact 81 are closed), after receiving a trip signal, the electric operating device 3 drives the gear member 3e to rotate and drives the button-driven tooth portion 3e-1c to rotate, the button-driven tooth portion 3e-1c drives the connecting member 1c to move, the connecting member 1c drives the rotating member 2a to rotate in a trip direction through the second connecting rod 1d, so that the circuit breaker is tripped, the driving gear member 3e moves to an initial position, and the circuit breaker enters the state shown in fig. 1.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A circuit breaker comprises a circuit breaker shell (4), and a button mechanism (1), an operating mechanism (2), an electric operating device (3), a moving contact (80) and a static contact (81) which are arranged in the circuit breaker shell (4) respectively; the button mechanism (1) is in driving connection with the operating mechanism (2), the electric operating device (3) is in driving fit with the operating mechanism (2), and the operating mechanism (2) is in driving connection with the moving contact (80); the method is characterized in that:

the electric operating device (3) comprises a motor (3a), a transmission gear set and a driving gear piece (3e) which are sequentially connected in a driving way, and an output gear which is matched with the driving gear piece (3e) in a driving way; the drive gear member (3e) includes a first helical stepped tooth portion (3 e-2); the operating mechanism (2) comprises a transmission piece (2a) which is arranged on the breaker shell (4) in a pivoting mode and is connected with the button mechanism (1) in a driving mode, the output gear is coaxially linked with the transmission piece (2a), and the output gear comprises a second spiral stepped tooth part (2 a-3); one of the first spiral stepped tooth part (3e-2) and the second spiral stepped tooth part (2a-3) is of a forward spiral stepped structure, and the other one is of an inverted spiral stepped structure; the first spiral stepped tooth part (3e-2) is in driving fit with the second spiral stepped tooth part (2a-3), and the driving transmission part (2a) is driven to rotate towards the closing direction, so that the circuit breaker is closed.

2. The circuit breaker of claim 1, wherein: the first spiral stepped tooth part (3e-2) and the second spiral stepped tooth part (2a-3) comprise the same number of teeth, and when the first spiral stepped tooth part (3e-2) drives the transmission part (2a) to rotate towards the closing direction through the second spiral stepped tooth part (2a-3), the teeth of the first spiral stepped tooth part (3e-2) are sequentially in driving fit with and separated from the teeth of the second spiral stepped tooth part (2 a-3).

3. The circuit breaker according to claim 1 or 2, characterized in that: the first spiral stepped tooth part (3e-2) is of a forward spiral stepped structure, and the second spiral stepped tooth part (2a-3) is of an inverted spiral stepped structure.

4. The circuit breaker of claim 1, wherein: the transmission piece (2a) and the output gear are of an integrated structure, the transmission piece (2a) comprises a transmission piece main body (2a-0) which is arranged on the breaker shell (4) in a pivoting mode, and the second spiral stepped tooth portion (2a-3) is arranged on the radial side wall of the transmission piece main body (2 a-0).

5. The circuit breaker of claim 1, wherein: the button mechanism (1) is pressed/pulled, and the transmission piece (2a) is driven to rotate towards the closing direction/opening direction, so that the circuit breaker is closed/opened; the electric operating device (3) drives the transmission piece (2a) to rotate towards the closing direction through the output gear, so that the breaker is closed; the electric operating device (3) drives the transmission piece (2a) to rotate towards the opening direction through the button mechanism (1) so as to open the circuit breaker; the closing direction and the opening direction are opposite.

6. The circuit breaker of claim 5, wherein: the driving gear piece (3e) further comprises a button driving tooth portion (3e-1c) which is coaxially arranged with the first spiral stepped tooth portion (3e-2), and the button driving tooth portion (3e-1c) is in driving fit with the button mechanism (1).

7. The circuit breaker according to claim 1 or 5 or 6, characterized in that: the driving gear piece (3e) further comprises a gear piece driven gear (3e-0), a gear piece driving column (3e-1) and a button driving tooth portion (3e-1c), the gear piece driven gear (3e-0) is meshed with the transmission gear set, the gear piece driving column (3e-1) is arranged on one side of the gear piece driven gear (3e-0) and is coaxially linked with the gear piece driven gear, a first spiral stepped tooth portion (3e-2) is arranged on the radial side wall of the gear piece driving column (3e-1), one end of the button driving tooth portion (3e-1c) is connected with the side wall of the first spiral stepped tooth portion (3e-2), and one side of the button driving tooth portion is connected with the gear piece driven gear (3 e-0).

8. The circuit breaker of claim 7, wherein: the driving gear piece (3e) is of an integrated structure; the button driving tooth part (3e-1c) comprises a tooth which is in driving fit with the button mechanism (1).

9. The circuit breaker according to claim 1 or 5, characterized in that: when the electric operating device (3) drives the circuit breaker to be switched on/off through the operating mechanism (2), the driving gear piece (3e) always rotates in the same direction.

10. The circuit breaker of claim 1, wherein: the operating mechanism (2) further comprises a transmission member return spring (2f), and the transmission member return spring (2f) applies acting force which enables the transmission member (2a) to rotate towards the opening direction to the transmission member (2 a);

the operating mechanism (2) further comprises a transmission connecting rod (2b), a rotating plate (2d), a locking piece (2c) and a tripping piece (2e), the rotating plate (2d) is arranged on the breaker shell (4) in a pivoting mode, the locking piece (2c) and the tripping piece (2e) are respectively arranged on the rotating plate (2d) in a pivoting mode, the button mechanism (1) is connected with the locking piece (2c) in a driving mode through the transmission connecting rod (2b), and the rotating plate (2d) is connected with the moving contact (80) in a driving mode;

the button mechanism (1) comprises a button piece (1a), a first connecting rod (1b), a connecting piece (1c) and a second connecting rod (1d) which are sequentially connected in a driving mode, the button piece (1a) and the connecting piece (1c) are arranged on a breaker shell (4) in a sliding mode, the connecting piece (1c) is connected with a transmission piece (2a) in a driving mode through the second connecting rod (1d), and the button piece (1) is pressed/pulled to drive the transmission piece (2) to rotate towards a closing direction/opening direction, so that the breaker is closed/opened; the driving gear piece (3e) of the electric operating device (3) is in driving fit with the connecting piece (1 c);

the transmission gear set further comprises a worm (3b), a first transmission gear (3c) and a second transmission gear (3d) which are sequentially meshed, the worm (3b) is connected with the motor (3a) in a driving mode, the first transmission gear (3c) and the second transmission gear (3d) are respectively arranged on the circuit breaker shell (4) in a pivoting mode, and the second transmission gear (3d) is further meshed with the driving gear piece (3 e).