CN111446093A

CN111446093A - Locking structure and circuit breaker with same

Info

Publication number: CN111446093A
Application number: CN202010366288.XA
Authority: CN
Inventors: 盛勇兵; 黄佳; 任昌宾; 王斌; 刘时胜
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-07-24

Abstract

The invention provides a locking structure and a circuit breaker with the same, belonging to the technical field of circuit breakers, wherein the locking structure comprises: a locking member having a locking end and an unlocking actuation end; said locking member being adapted to be rotatably disposed within a housing of an electrical switching apparatus; when the locking piece is in the locking position, the locking end extends out of the shell of the electric switch device; at the moment, the unlocking execution end is blocked on a brake separating execution path of an operating mechanism of the electric switch device; when the operating mechanism of the electric switch device performs opening operation, the unlocking execution end of the locking piece is driven, so that the locking end of the locking piece retracts into the shell of the electric switch device; after the locking structure is arranged in the electric switch device, unlocking is realized by executing the opening of the operating mechanism, so that the danger of electrified disassembly of the electric switch device can be avoided.

Description

Locking structure and circuit breaker with same

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a locking structure and a circuit breaker with the same.

Background

The breaker is a switching device capable of bearing and breaking current under abnormal loop conditions within a specified time, and is provided with a movable contact and a fixed contact which can perform on-off operation inside, wherein the movable contact is driven by an operating mechanism.

The plug-in circuit breaker in the circuit breaker is widely used, the plug-in circuit breaker is installed by being inserted into the cabinet, after the circuit breaker is inserted into the cabinet, a conductive plate in the circuit breaker is connected with a power supply in the cabinet, a moving contact and a static contact are arranged in the circuit breaker, and when the moving contact is in contact with the static contact, power can be supplied to a load connected with the circuit breaker.

When the circuit breaker needs to be taken out from the cabinet, in order to avoid taking out the circuit breaker in an electrified way, the moving contact and the static contact in the circuit breaker are ensured to be in an off state.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that a moving contact and a fixed contact in a breaker are possibly in a connected state in the process of taking out a cabinet in the breaker in the prior art, thereby providing a locking structure.

The invention also provides a circuit breaker with the locking structure.

The present invention provides a lock structure including:

a locking member having a locking end and an unlocking actuation end; said locking member being adapted to be rotatably disposed within a housing of an electrical switching apparatus;

when the locking piece is in the locking position, the locking end extends out of the shell of the electric switch device; at the moment, the unlocking execution end is blocked on a brake separating execution path of an operating mechanism of the electric switch device;

when the operating mechanism of the electric switch device performs opening operation, the unlocking execution end of the locking piece is driven, so that the locking end of the locking piece retracts into the shell of the electric switch device.

Preferably, the locking piece is also provided with a driving end; when the locking piece is not in a locking position state, the moving area of the driving end in the shell of the electric switch device and the moving area of the lock catch of the operating mechanism of the electric switch device are provided with an intersection area;

preferably, the latch of the operating mechanism of the electrical switching device has an unlocking direction; in a retracted state of the locking element in the direction of the housing of the electrical switching device, the drive end of the locking element is in contact with the catch, so that the catch can be moved in the unlocking direction for unlocking.

Preferably, the locking member has a first extension arm and a second extension arm that are disposed at an angle, the first extension arm is formed with the unlocking execution end, and the second extension arm is formed with the driving end and the locking end.

Preferably, a locking portion for engaging with a lock return elastic member having a biasing force for holding the locking member at the locking position is provided above the locking end.

Preferably, the plane formed by the front side wall of the locking end of the locking member is vertical or inclined forward at the bottom when the locking end extends out of the casing of the electric switch device.

Preferably, the rear side of the locking end of the locking member has a contact platform adapted to snap into engagement with the housing of the electrical switching apparatus.

The circuit breaker provided by the invention comprises any one of the locking structures, and further comprises:

a front end driving member rotatably installed in a housing of the circuit breaker and having a through hole adapted to pass through the first link; after the first connecting rod is inserted into the through hole of the front end driving piece, the extending end is suitable for being contacted with the unlocking execution end of the locking piece of the locking structure.

Preferably, the front end driving member is connected with the button of the circuit breaker through a first link, and the through hole of the front end driving member for passing through the first link is a long hole.

the lock catch is arranged in the shell of the circuit breaker in a relatively rotating manner, and the moving contact and the static contact in the circuit breaker can be disconnected by rotating to an unhooking position;

the lock catch is provided with a matching operation end extending towards the direction of the locking structure, and the matching operation end is suitable for being driven by the driving end of the locking structure to enable the lock catch to rotate towards the unhooking position.

Preferably, the method further comprises the following steps:

The technical scheme of the invention has the following advantages:

1. the locking structure provided by the invention is used for being installed in an electric switch device, and can be switched on after the electric switch device is inserted into a cabinet, and at the moment, a locking piece of the locking structure is provided with a locking end extending out of a shell of the electric switch device and used for preventing the electric switch device from being pulled out of the cabinet through the locking end;

when the electric switch device is pulled out of the cabinet, the opening operation needs to be carried out firstly, and then the locking end of the locking piece is retracted into the shell of the electric switch device; adopt the locking structure of this application, when carrying out the operation of the locking end withdrawal of locking piece in electric switching device's casing, need realize through executive operation mechanism's separating brake, when carrying out the separating brake operation promptly, carry out the unblock, just so can not produce the problem of forgetting the separating brake, avoided electrified danger of dismantling.

2. The locking structure provided by the invention is characterized in that the locking piece is also provided with a driving end, the driving end is provided with an intersection area between a moving area of the driving end in the shell of the electric switching device and a moving area of the lock catch of the operating mechanism of the electric switching device under the state that the locking piece is not in a locking position, when the locking piece is in the locking state, the locking piece retracts into the shell, and the driving end of the locking piece can prevent the lock catch of the operating mechanism from moving towards the closing direction, specifically: when the electric switching device is not assembled in place, the locking end of the locking piece is located in the intersection area in the shell of the electric switching device, at the moment, the driving end of the locking piece is blocked on an execution path of the lock catch, and the lock catch cannot perform switching-on operation, so that switching-on can not be performed under the condition that the assembly is not in place when the electric switching device is assembled.

When the lock catch is located at a position for closing, in the process that the locking piece retracts towards the shell of the electric switching device, the driving end of the locking piece is in contact with the lock catch, so that the lock catch can move towards the unlocking direction to be unlocked, and the electrified assembly of the electric switching device can be avoided through the driving end of the locking piece; at the in-process with electric switching device inserted the rack, if electric switching device's operating device is in closing state, then at the in-process that electric switching device inserted the rack, the locking end of locking piece is pushed back to in electric switching device's the lock shell by the rack, and at this moment, the drive end of locking piece can be stirred the hasp in the electric switching device, makes the hasp execution unhook to when guaranteeing that electric switching device assembles, its inside is in the separating brake state.

3. The present invention provides a locking structure, a plane formed on a front side wall of a locking end of the locking member for cooperating with a cabinet, the plane being adapted to be caught on the cabinet when the locking end of the locking member is protruded out of a housing of an electric switching apparatus, thereby maintaining locking of the electric switching apparatus.

4. The circuit breaker provided by the invention is provided with the front end driving piece, the front end driving piece is connected with the button through the first connecting rod, one end of the first connecting rod is inserted into the front end driving piece, and then the end part of the first connecting rod can be used for driving the unlocking execution end of the locking piece of the locking structure, so that when the unlocking execution end is blocked on the moving path of the first connecting rod, the pulling-out of the button is limited, and the button can be kept in a state of not being pulled out.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a perspective view illustrating a locking member of the locking structure of the present invention.

Fig. 2 is a schematic perspective view of the locking member of fig. 1 at another angle.

Fig. 3 is a perspective view of the locking structure of the present invention in a locked position within the circuit breaker.

Fig. 4 is a partially enlarged view of a portion a shown in fig. 3.

Fig. 5 is a perspective view of the locking structure of the present invention in an unlocked position within the circuit breaker.

Fig. 6 is a partially enlarged view of fig. 5 at B.

Description of reference numerals:

1. a button; 2. a locking member; 3. locking the return elastic member; 4. a first link; 5. a front end drive member; 6. a second link; 7. locking; 8. a matching operation end; 9. static contact; 10. a moving contact; 11. unlocking the execution end; 12. a locking end; 13. a driving end; 14. clamping a platform; 15. a front side wall; 16. a contact platform.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The present embodiments provide a circuit breaker having a locking structure therein for locking the circuit breaker in a cabinet.

As shown in fig. 1 and 2, the locking structure includes: the locking piece 2, locking piece 2 rotates and sets up in the casing of circuit breaker, locking piece 2 has the first extension arm and the second extension arm that the angle set up, the rotation path of first extension arm with the rotation path of second extension arm is located different planes.

As shown in fig. 1 and 2, an unlocking execution end 11 is formed on the first extension arm, and a driving end 13 and a locking end 12 are formed on the second extension arm. The driving end 13 is used for extending towards the direction of the operating mechanism of the circuit breaker, the locking end 12 is used for extending out of the shell of the circuit breaker, and the unlocking execution end 11 is used for extending towards the direction of the operating mechanism of the circuit breaker.

As shown in fig. 1 and 2, a latch 14 for connecting with a locking return elastic member 3 provided in the circuit breaker is provided above the locking end 12, and the latch 14 and the driving end 13 are provided in parallel in the thickness direction of the second extension arm. The locking return elastic member 3 is connected to the locking member 2 and has a biasing force for maintaining the locking member 2 at the locking position, and the locking return elastic member 3 is a torsion spring.

As shown in fig. 1 and 2, a locking return elastic member 3 is further disposed in the circuit breaker, the locking return elastic member 3 is selected as a torsion spring, a torsion arm of the torsion spring abuts against a catch 14, and a biasing force is provided to extend the locking end 12 of the locking member 2 out of the circuit breaker housing.

As shown in fig. 1, the plane formed by the front side wall 15 of the locking end 12 of the locking member 2 is in a vertical state when the locking end 12 extends out of the case of the circuit breaker; in addition, as an alternative embodiment, the plane may be inclined forward from the bottom.

As shown in fig. 2, the rear side of the locking end 12 of the locking member 2 has a contact platform 16 adapted to engage with the housing of the electrical switching apparatus, whereby the contact platform 16 is used to block the locking member 2 from extending completely out of the housing of the circuit breaker.

As shown in fig. 3 and 4, the circuit breaker further includes: a latch 7 and a front end driver 5. The lock catch 7 is rotatably arranged in the shell and used for enabling a moving contact and a fixed contact in the shell to be in contact and locked at a switch-on position through rotation, the lock catch 7 is driven through a trip catch, and the trip catch is connected with the front-end driving part 5 through a second connecting rod 6; when the switch is switched on, the front-end driving piece 5 drives the jump buckle to rotate through the second connecting rod 6, the jump buckle pushes the lock catch 7 to rotate in a linkage mode, when the jump buckle rotates to a certain distance, the jump buckle and the lock catch 7 are located at a rotation dead point, at the moment, the lock catch 7 is locked and cannot rotate reversely, and a moving contact and a static contact in the shell are in contact with each other and are locked under the action of the lock catch 7. The lock catch 7 is provided with a matching operation end 8 extending towards the direction of the locking structure, when the lock catch 7 rotates, the matching operation end 8 moves along an execution path, the execution path and the movement path of the driving end 13 of the locking piece are provided with intersection areas, and when the locking piece 2 is driven to rotate towards the direction of releasing the locking of the circuit breaker, the driving end 13 of the locking piece 2 can drive the matching operation end 8 of the lock catch 7 to enable the lock catch 7 to rotate along the direction of executing unhooking.

As shown in fig. 3 and 4, the front end driver 5 is rotatably installed in the housing of the circuit breaker, the front end driver 5 is connected with the push button 1 through the first link 4, and a through hole which is a long hole and is suitable for passing through the first link 4 is formed in the front end driver 5; after the first link 4 is inserted into the through hole of the front end driver 5, the protruding end of the first link 4 is adapted to contact the unlocking performing end 11 of the locking member 2 of the locking structure, thereby driving the locking member 2 to rotate toward the unlocking position.

As shown in fig. 3 and 4, the front end driving member 5 is connected to the latch 7 through a second link 6, and is configured to drive the latch 7 to rotate toward a direction in which the moving contact and the stationary contact make contact.

When the locking member 2 is in the locking position, as shown in fig. 4, the locking end 12 of the locking member 2 extends out of the housing of the electric switching device, so that the electric switching device is locked in the cabinet and cannot be drawn out; at this time, the moving contact and the fixed contact in the circuit breaker can be contacted, and the matching operation end 8 of the lock catch 7 is opposite to the driving end 13 of the locking piece 2.

As shown in fig. 4, when the unlocking performing end 11 of the locking member 2 is driven by the first link 4, the locking end 12 of the locking member 2 is retracted into the case of the circuit breaker, and at the same time, the locking member 2 moves the driving end 13 of the locking member 2 toward the direction of the engaging operation end 8 of the latch 7 by rotating against the biasing force of the locking return spring 3, thereby driving the latch 7 to perform unhooking.

As shown in fig. 5 and 6, when the circuit breaker needs to be taken out of the cabinet, the locking end 12 of the locking member 2 is retracted into the housing of the circuit breaker. The specific operation is as follows: pulling the button 1 outward, the first link 4 pulls the front end driver 5 to rotate, and at the same time, the insertion end of the first link 4 inserted into the front end driver 5 drives the unlocking performing end 11 of the locking member 2, so that the locking member 2 rotates toward the unlocking position, i.e., as shown in fig. 6, the locking end 12 of the locking member 2 retracts into the housing of the circuit breaker. In the process that the locking piece 2 rotates towards the unlocking position, the driving end 13 of the locking piece 2 stirs the matching operation end 8 of the lock catch 7 to enable the lock catch 7 to rotate, and therefore the contact between the movable contact and the fixed contact in the circuit breaker is released.

Method of use and principles

As shown in fig. 3 and 4, when the circuit breaker is already installed in the cabinet, the locking member 2 is in the locking position, that is, the locking end 12 extends out of the housing of the circuit breaker and into the groove of the cabinet, so as to fix the circuit breaker in the groove, and the driving end 13 is far away from the execution path of the matching operation end 8 of the latch 7, so that the contact and disconnection between the moving contact 10 and the static contact 9 driven by the latch 7 are not affected.

As shown in fig. 5 and 6, when the circuit breaker needs to be taken out from the cabinet, the button 1 may be pulled to move the button 1 forward, the switch pulls the first link 4 forward to drive the front driving device to rotate, the front driving device rotates to drive the second link 6 to move, so as to drive the latch 7 to rotate, and drive the moving contact 10 and the static contact 9 to be separated; meanwhile, the extending end of the first connecting rod 4 is abutted to the execution releasing end to drive the locking piece 2 to rotate around the shaft, so that the locking piece 2 retracts into the shell of the circuit breaker to perform contact locking on the circuit breaker; in the rotating process of the locking piece 2, the driving end 13 also touches the matching operation end 8 of the lock catch 7 to provide a driving force for the lock catch 7, and the lock catch 7 is driven to drive the moving contact 10 and the static contact 9 to be separated; the arrangement of the structure ensures that the breaker can not be in a closing state when the breaker is taken out of the cabinet, thereby ensuring the safety of equipment and personnel.

Meanwhile, if the switch cannot directly control the lock catch 7 to rotate to drive the moving contact 10 to be separated from the static contact 9, the driving end 13 of the locking piece 2 can drive the lock catch 7 to drive the static contact 9 to be separated from the moving contact 10, and therefore double guarantee is provided for the breaker to break under the crisis condition.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A locking structure, comprising:

a locking member (2) having a locking end (12) and an unlocking actuation end (11); the locking member (2) is adapted to be rotatably arranged in a housing of the electrical switching device;

when the locking member (2) is in the locking position, the locking end (12) extends out of the housing of the electrical switching device; at the moment, the unlocking execution end (11) is blocked on a brake-separating execution path of an operation mechanism of the electric switch device;

when the operating mechanism of the electric switch device is operated to open the brake, the unlocking execution end (11) of the locking piece (2) is driven, so that the locking end (12) of the locking piece (2) retracts into the shell of the electric switch device.

2. A locking arrangement as claimed in claim 1, characterised in that the locking element (2) also has a driving end (13) thereon; when the locking element is not in the locking position, the movement region of the drive end (13) in the housing of the electrical switching device and the movement region of the catch of the operating mechanism of the electrical switching device have an intersection region.

3. A locking arrangement as claimed in claim 2, wherein the latch of the operating mechanism of the electrical switching apparatus has an unlocking direction; in the retracted state of the locking element (2) in the direction of the housing of the electrical switching device, the drive end (13) of the locking element (2) comes into contact with the catch, so that the catch can be moved in the unlocking direction for unlocking.

4. A locking arrangement as claimed in claim 3, characterised in that the locking element (2) has a first and a second angularly disposed extension arm, the first extension arm having the unlocking actuation end (11) formed thereon and the second extension arm having the drive end (13) and the locking end (12) formed thereon.

5. A locking arrangement as claimed in claim 4, characterised in that above the locking end (12) there is a catch (14) for connection with a lock return spring (3), the lock return spring (3) having a biasing force that holds the locking member (2) in the locking position.

6. Locking arrangement according to any of claims 1-5, characterized in that the plane formed by the front side wall of the locking end (12) of the locking element (2) is vertical or inclined forward at its bottom end when the locking end (12) protrudes outside the housing of the electric switching device.

7. The circuit breaker, characterized by comprising the locking structure of any one of claims 1 to 6, and further comprising:

a front end driver (5) rotatably mounted in the housing of the circuit breaker and having a through hole adapted to pass through the first link (4); after the first connecting rod (4) is inserted into the through hole of the front end driving piece (5), the extending end is suitable for being contacted with an unlocking execution end (11) of a locking piece (2) of the locking structure.

8. The circuit breaker according to claim 7, characterized in that the front end driver (5) is connected with the push button (1) of the circuit breaker by a first link (4), and the through hole of the front end driver (5) for passing through the first link (4) is a long hole.

9. The circuit breaker, characterized by comprising the locking structure of any one of claims 2 to 5, and further comprising:

the lock catch (7) is arranged in the shell of the circuit breaker in a relatively rotating way, and the moving contact and the static contact in the circuit breaker can be disconnected by rotating to a unhooking position;

the lock catch (7) is provided with a matching operation end (8) extending towards the locking structure, and the matching operation end (8) is suitable for being driven by a driving end (13) of the locking structure to enable the lock catch (7) to rotate towards the unhooking position.

10. The circuit breaker of claim 9, further comprising: