CN218867019U

CN218867019U - Circuit breaker mechanism auxiliary device and circuit breaker

Info

Publication number: CN218867019U
Application number: CN202320123514.0U
Authority: CN
Inventors: 崔恒庆; 邢垒垒; 秦治斌; 廖传灿; 付光
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2023-02-06
Filing date: 2023-02-06
Publication date: 2023-04-14
Anticipated expiration: 2033-02-06

Abstract

The utility model belongs to the technical field of low-voltage apparatus, a circuit breaker mechanism auxiliary device and circuit breaker is disclosed. The auxiliary device of the circuit breaker mechanism comprises a shell and an auxiliary mechanism unit, wherein a pivot is arranged on the shell, and a cantilever is rotatably arranged on the pivot; the mechanism auxiliary unit comprises a hoop and an elastic piece, the hoop is arranged on the shell, one end of the elastic piece is connected with the hoop, and the other end of the elastic piece is connected with the cantilever. This circuit breaker mechanism auxiliary device can the circuit breaker play supplementary separation effect to the moving contact of circuit breaker when the divide-shut brake, prevents to produce after the moving contact separating brake and kick-backs by a wide margin, improves the reliability of circuit breaker separating brake.

Description

Circuit breaker mechanism auxiliary device and circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus technical field especially relates to circuit breaker mechanism auxiliary device and circuit breaker.

Background

When the existing low-voltage air circuit breaker is in a brake-separating process, the part of a moving contact connected with a circuit breaker operating mechanism is made of rigid materials, so that the moving contact has a serious bouncing phenomenon, namely, the moving contact and the static contact of the circuit breaker have great resilience when reaching a final brake-separating position (maximum opening distance), and the resilience amplitude of the moving contact and the static contact can reach half of the opening distance; when the circuit breaker protects electric lines and equipment, such as fault tripping caused by overload, short circuit, overpressure and the like, the electric arc cannot be extinguished in time or even reignited due to the rebound, and the short circuit breaking capacity of the circuit breaker is seriously influenced.

The existing low-voltage circuit breaker, especially the universal circuit breaker, the used contact opening rebound-proof structure forms interlocking by inertia, and prevents the moving contact from generating large-amplitude rebound after opening, the scheme has poor reliability, and is easy to cause misoperation in the closing process of the circuit breaker, thereby causing the circuit breaker to be incapable of effectively closing or not acting during opening and being incapable of playing a protection role; the existing brake-separating rebound-preventing device is arranged in the mechanism, and the rebound of the mechanism main shaft during brake separation is resisted through the collision with the mechanism, so that the device directly acts the stress on the operating mechanism, and the mechanical life of the circuit breaker is greatly shortened.

Therefore, a circuit breaker mechanism auxiliary device and a circuit breaker are needed to solve the problems in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a circuit breaker mechanism auxiliary device, moving contact resilience when can avoiding the circuit breaker separating brake has improved the reliability and the security of separating brake.

To achieve the purpose, the utility model adopts the following technical proposal:

circuit breaker mechanism auxiliary device includes:

the device comprises a shell, a rotating shaft and a rotating shaft, wherein a cantilever is arranged on the rotating shaft;

and the mechanism auxiliary unit comprises a hoop and an elastic piece, the hoop is arranged on the shell, one end of the elastic piece is connected with the hoop, and the other end of the elastic piece is connected with the cantilever.

Optionally, the mechanism auxiliary unit further comprises a pin, the pin is fixedly arranged on the hoop, one end of the elastic piece is connected with the pin, and the other end of the elastic piece is connected with the cantilever.

Optionally, be provided with the pilot hole on the staple bolt, at least part the pin is worn to locate the pilot hole, just the pin with staple bolt fixed connection.

Optionally, an avoiding groove is formed in the hoop, and at least part of the pivot is located in the avoiding groove.

Optionally, a through hole is formed in the cantilever, one end of the elastic piece is hooked on the through hole, and the other end of the elastic piece is hooked on the pin.

Optionally, a convex portion is disposed on the cantilever, and the through hole is disposed on the convex portion.

Optionally, the mechanism auxiliary unit further comprises a fixing piece, a fixing hole is formed in the hoop, and the fixing piece is arranged in the fixing hole in a penetrating mode and connected with the shell in a threaded mode.

Optionally, the resilient member is a spring.

Optionally, the anchor ear is made of a metal material or an insulating material.

Another object of the utility model is to provide a circuit breaker, moving contact resilience when can avoiding the circuit breaker separating brake has improved the reliability and the security of separating brake, has improved the mechanical life of circuit breaker.

the circuit breaker comprises the circuit breaker mechanism auxiliary device.

Has the advantages that:

the utility model provides a circuit breaker mechanism auxiliary device, when the circuit breaker is in the separating brake state, the elastic component between the cantilever and the hoop is not easy to drop because of the initial elastic component force; when the breaker is switched on, the pivot rotates to drive the cantilever to rotate towards the same direction of the switching-on direction, the elastic part between the cantilever and the hoop is stretched and stressed, and the cantilever is always stressed in the switching-off direction due to the interaction of the forces; when the breaker is opened, the cantilever is driven by the main shaft to rotate in the opening direction and is also pulled by the elastic piece, so that the moving contact and the static contact of the breaker can be more quickly separated; when the cantilever is restored to the opening position, the original force in the rebound direction borne by the cantilever is opposite to the tensile force of the elastic part and is offset due to the collision of rigid materials, so that the cantilever does not rebound any more, the moving contact is always in the final opening position (maximum opening distance) in the opening state, and the reliability and the safety of the circuit breaker are ensured; in addition, the elastic part in the auxiliary device of the circuit breaker mechanism is directly connected with the existing cantilever arranged on the pivot, other structures for fixing the elastic part are not required to be additionally arranged, and the auxiliary device of the circuit breaker mechanism is simple in structure and easy to implement.

The utility model provides a circuit breaker, through using foretell circuit breaker mechanism auxiliary device, effectively improved reliability and security in the circuit breaker use, improved the mechanical life of circuit breaker.

Drawings

Fig. 1 is a schematic mechanism diagram of a circuit breaker mechanism auxiliary device provided by the present invention;

FIG. 2 is an enlarged partial schematic view at A of FIG. 1;

fig. 3 is a schematic structural diagram of the auxiliary device of the circuit breaker mechanism provided by the present invention in the opening state;

fig. 4 is a schematic structural diagram of the circuit breaker mechanism auxiliary device provided by the present invention in a closing state.

In the figure:

100. a housing; 110. a pivot; 120. a cantilever; 121. a convex portion; 122. a through hole;

200. a mechanism auxiliary unit; 210. hooping; 211. an assembly hole; 212. a fixing hole; 213. an avoidance groove; 220. an elastic member; 230. a pin.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

This embodiment provides a circuit breaker mechanism auxiliary device, and this circuit breaker mechanism auxiliary device is used for the circuit breaker to play the additional action to the moving contact of circuit breaker when divide-shut brake, prevents to produce after the moving contact separating brake and kick-backs by a wide margin, improves the reliability of circuit breaker separating brake.

Specifically, as shown in fig. 1 to 4, the circuit breaker mechanism auxiliary device includes a housing 100 and a mechanism auxiliary unit 200, the housing 100 is provided with a pivot 110, and the pivot 110 is provided with a cantilever 120; the mechanism auxiliary unit 200 includes an anchor ear 210 and an elastic member 220, the anchor ear 210 is disposed on the housing 100, one end of the elastic member 220 is connected to the anchor ear 210, and the other end is connected to the cantilever 120.

In the present embodiment, as shown in fig. 2 to 4, when the circuit breaker is in the open state, the elastic member 220 between the cantilever 120 and the hoop 210 is not easy to fall off due to the initial elastic member 220 force; when the circuit breaker is switched on, the pivot 110 rotates to drive the cantilever 120 to rotate in the same direction of the switching on, the elastic member 220 between the cantilever 120 and the hoop 210 is stretched and stressed accordingly, and the cantilever 120 is always stressed by a force in the switching off direction due to the interaction of the forces; when the circuit breaker is opened, the cantilever 120 is driven by the main shaft to rotate in the opening direction and is also pulled by the elastic element 220, so that the moving and static contacts of the circuit breaker can be more quickly separated; when the cantilever 120 is restored to the opening position, the original force in the rebound direction applied to the cantilever 120 is opposite to the pulling force of the elastic element 220 and is offset due to the collision of the rigid material, so that the cantilever 120 does not rebound any more, the moving contact is always in the final opening position (maximum opening distance) in the opening state, and the reliability and the safety of the circuit breaker are ensured; in addition, the elastic member 220 in the auxiliary device of the circuit breaker mechanism is directly connected with the existing cantilever 120 arranged on the pivot 110, and other structures for fixing the elastic member 220 are not required to be additionally arranged, so that the structure is simple and easy to implement.

Optionally, as shown in fig. 2 to fig. 4, the mechanism auxiliary unit 200 further includes a pin 230, the pin 230 is fixedly disposed on the hoop 210, the pin 230 is perpendicular to an end surface of the hoop 210, and the pin 230 is parallel to the pivot 110, one end of the elastic member 220 is connected to the pin 230, and the other end is connected to the cantilever 120, so as to ensure that, in the opening process, the elastic member 220 can assist the moving contact of the circuit breaker to separate by virtue of the elasticity when the elastic member is stretched to restore the original state, and the resilience direction force applied by the pin 230 is opposite to the spring tension force to counteract, so as to ensure that the cantilever 120 does not rebound, and thus ensure that the moving contact does not rebound, and ensure that the moving contact is always at the final opening position in the opening state.

Further, be provided with pilot hole 211 on the staple bolt 210, at least some pin 230 wears to locate pilot hole 211, and pin 230 and staple bolt 210 fixed connection, can be convenient for the pin 230 to install on staple bolt 210, improve the dismouting efficiency of circuit breaker.

Preferably, the anchor ear 210 is provided with an avoiding groove 213, and at least a portion of the pivot 110 is located in the avoiding groove 213, so as to ensure that the anchor ear 210 is disposed in a state of surrounding the pivot 110, so as to ensure that the pin 230 can be disposed right above the pivot 110 in parallel, such that a direction of the force when the elastic element 220 is stretched to return to an original state is approximately the same as a moving direction of the cantilever 120 at a moment of rotating when the breaker is opened, thereby ensuring that the moving contact of the breaker is quickly opened.

Optionally, the cantilever 120 is provided with a through hole 122, one end of the elastic element 220 is hooked on the through hole 122, and the other end of the elastic element 220 is hooked on the pin 230, so that the stable structure of the connection of the elastic element 220 can be ensured, the elastic element 220 is prevented from falling, and the reliability of the mechanism auxiliary unit 200 is improved.

Optionally, the cantilever 120 is provided with a convex portion 121, and the through hole 122 is provided on the convex portion 121, so that the elastic member 220 can be conveniently mounted, and the convenience of assembly and disassembly is improved.

Optionally, the mechanism auxiliary unit 200 further includes a fixing member, a fixing hole 212 is disposed on the hoop 210, the fixing member is disposed through the fixing hole 212 and is in threaded connection with the housing 100, and the fixing member can fix the hoop 210 on the housing 100 to ensure that the hoop 210 can be stably connected. Specifically, the fixing piece is a fastening bolt, the fastening bolt is fixed, the cost is low, and the cost can be further saved.

Preferably, the elastic member 220 in this embodiment is a spring, specifically an extension spring, which has good elasticity and low cost, and can further save cost, and meanwhile, when the circuit breaker is opened, the cantilever 120 can be quickly pulled back by the elastic force of the extension spring, so that the moving contact of the circuit breaker can be effectively separated from the contact, and the reliability of opening is improved.

Optionally, the hoop 210 in this embodiment is made of metal, so that the strength of the hoop 210 can be ensured, and the service life of the hoop 210 is prolonged. Specifically, the anchor ear 210 may be a cast copper piece.

In other embodiments, the hoop 210 may also be made of an insulating material, so that the occurrence of a short circuit inside the circuit breaker can be avoided, and the safety of the circuit breaker is improved. Specifically, the anchor ear 210 may be made of thermosetting plastic material.

The embodiment also provides a circuit breaker, including foretell circuit breaker mechanism auxiliary device, effectively improved reliability and the security of separating brake in the circuit breaker use, improved the mechanical life of circuit breaker.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Circuit breaker mechanism auxiliary device, its characterized in that includes:

the device comprises a shell (100), wherein a pivot (110) is rotatably arranged on the shell (100), and a cantilever (120) is arranged on the pivot (110);

the mechanism auxiliary unit (200) comprises a hoop (210) and an elastic piece (220), the hoop (210) is arranged on the shell (100), one end of the elastic piece (220) is connected with the hoop (210), and the other end of the elastic piece is connected with the cantilever (120).

2. The circuit breaker mechanism auxiliary apparatus as claimed in claim 1, wherein said mechanism auxiliary unit (200) further comprises a pin (230), said pin (230) is fixed on said hoop (210), one end of said elastic member (220) is connected to said pin (230), and the other end is connected to said cantilever (120).

3. The auxiliary device for the circuit breaker mechanism as claimed in claim 2, wherein the anchor ear (210) is provided with an assembly hole (211), at least a portion of the pin (230) is inserted into the assembly hole (211), and the pin (230) is fixedly connected with the anchor ear (210).

4. The circuit breaker mechanism auxiliary device of claim 1 wherein an avoidance slot (213) is provided on the anchor ear (210), at least a portion of the pivot (110) being located in the avoidance slot (213).

5. The auxiliary device of circuit breaker mechanism as claimed in claim 2, wherein the cantilever (120) is provided with a through hole (122), one end of the elastic member (220) is hooked on the through hole (122), and the other end is hooked on the pin (230).

6. The circuit breaker mechanism auxiliary device according to claim 5, wherein a convex portion (121) is provided on the cantilever (120), and the through hole (122) is provided on the convex portion (121).

7. The auxiliary device of circuit breaker mechanism as claimed in any one of claims 1-6, wherein the auxiliary unit (200) further comprises a fixing member, and the anchor ear (210) is provided with a fixing hole (212), and the fixing member is threaded through the fixing hole (212) and is connected with the housing (100) by screw thread.

8. The circuit breaker mechanism assist device of any of claims 1-6 wherein said resilient member (220) is a spring.

9. The circuit breaker mechanism auxiliary device according to any one of claims 1-6, wherein the anchor ear (210) is made of metal or insulating material.

10. Circuit breaker, characterized in that it comprises a circuit breaker mechanism auxiliary device according to any one of claims 1-9.