CN211016971U

CN211016971U - Buffer device of circuit breaker and circuit breaker comprising same

Info

Publication number: CN211016971U
Application number: CN201922497079.4U
Authority: CN
Inventors: 瞿钊
Original assignee: Schneider Electric Xiamen Switch Equipment Co ltd
Current assignee: Schneider Electric Xiamen Switch Equipment Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-14
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to a buffer and circuit breaker including this buffer. The buffer device is arranged on a shell of the breaker and comprises a buffer main body, the buffer main body comprises an extension part, wherein when the breaker is opened, a moving part of the breaker collides with the extension part and transmits energy to the buffer main body, so that the buffer main body rotates and vibrates.

Description

Buffer device of circuit breaker and circuit breaker comprising same

Technical Field

The utility model relates to a buffer of circuit breaker and circuit breaker including this buffer.

Background

A circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time. The circuit breaker is used as an online protection and control element and has high opening speed. In addition, in order to reduce the volume of the circuit breaker, the stroke of the movable contact of the circuit breaker should be smaller.

During the opening process of the circuit breaker, enough energy is needed to open the circuit breaker in order to reduce the high movement speed to zero in a small stroke. This energy is typically provided by the opening spring and the contact spring. When the distance between the moving contact and the fixed contact is enough to extinguish the electric arc, the action energy of the operating mechanism of the circuit breaker needs to be quickly absorbed, so that the damage of internal parts of the operating mechanism, such as a damaged moving part and an arc extinguish chamber, caused by overlarge impact is prevented, and the reignition caused by the reduction of the distance between the moving contact and the fixed contact due to overlarge rebound is avoided. At present, the damping mode used by the circuit breaker is mainly to add an oil damper for absorbing the redundant energy and limiting the opening position of the circuit breaker so as to inhibit the overshoot and rebound of the circuit breaker.

However, oil buffers are expensive and their performance drops significantly at lower temperatures (typically-25 ℃). At the temperature of minus 25 ℃, the grease is cooled to cause overlarge damping, and the grease cannot effectively absorb the redundant energy in the brake separating process at the moment, so that the overshoot or rebound of the circuit breaker is overlarge.

Therefore, how to effectively inhibit the overshoot and rebound during the opening of the circuit breaker, improve the performance of the circuit breaker at low temperature, prolong the service life of the circuit breaker, reduce the parts in the circuit breaker, and simplify the assembly and adjustment of the circuit breaker has become a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a buffer of circuit breaker and circuit breaker including this buffer, overshoot and bounce-back when it can effectively restrain the circuit breaker separating brake improve the performance of circuit breaker when low temperature, and the life-span of extension circuit breaker reduces the spare part in the circuit breaker, simplifies the assembly and the regulation of circuit breaker.

The utility model relates to a buffer of circuit breaker, buffer sets up just including buffering the main part on the casing of circuit breaker, and the buffering main part includes the extension, wherein during the circuit breaker separating brake, the moving part striking of circuit breaker the extension with energy transfer for the buffering main part, so that the rotatory and vibration of buffering main part.

Preferably, the buffer body is made of metal.

Preferably, the cushioning body further comprises a weight disposed distally from the extension.

Preferably, the buffer device further comprises an installation frame and a pin shaft, the buffer main body is arranged on the installation frame through the pin shaft and can rotate around the pin shaft, the installation frame is arranged on a shell of the circuit breaker,

the utility model discloses still relate to a circuit breaker, its characterized in that, this circuit breaker include as before buffer.

Preferably, the circuit breaker includes a moving member, and the moving member includes a pin provided on one end thereof and protruding, wherein the pin strikes an extension of a buffer main body of the buffer device when the circuit breaker is opened.

Drawings

The advantages and objects of the present invention will be better understood from the following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the relationship of the various components. In the drawings:

fig. 1 is a schematic view showing a buffer device of a circuit breaker according to an embodiment of the present invention;

FIG. 2 is a three-dimensional schematic view illustrating the cushioning device of FIG. 1;

FIG. 3 is a side view of the cushioning device of FIG. 1;

fig. 4 is a partial schematic view of a circuit breaker according to an embodiment of the present invention, in which a damping device according to the present invention is provided; and

fig. 5 is a partial schematic view of the breaker of fig. 4 during opening, which shows how the damping device absorbs the excess energy during opening.

Detailed Description

Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are given to constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted. The terms "upper", "lower", "left", "right", and the like herein, if not specifically stated, are all described with respect to the drawings of the present invention, and do not limit the scope of the present invention.

The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of the respective portions and the mutual relationships thereof.

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 to 3 show schematic views of the respective directions of the damping device 1 for the circuit breaker, and fig. 4 and 5 show partial schematic views of the circuit breaker 2 in which the damping device 1 is included in different states.

As shown in fig. 1 to 3, the damper device 1 includes a damper main body 3, a mounting bracket 4, and a pin 5. The damping device 1 is provided on a housing of the circuit breaker. For example, the buffer main body 3 is disposed on the mounting bracket 4 by a pin 5 and can rotate around the pin 5, and the mounting bracket 4 is disposed on a housing of the circuit breaker, for example, at the bottom of the housing of the circuit breaker, as shown in fig. 4. In addition, the cushion body 3 includes an extension portion 6 provided at one side thereof, for example, at the right side thereof in fig. 1. The damping body 3 further comprises a weight 7 arranged remote from the extension, which is arranged on the side opposite to the extension, e.g. in fig. 1 the weight 7 is located on the left side of the damping body. The weight member maintains the buffer body in an initial stationary state when not struck, for example, as shown in fig. 4, the extension portion is located directly below the moving part of the circuit breaker. In addition, the weight member prevents the damping body from being excessively vibrated and rotated when being impacted.

As shown in fig. 4 and 5, the moving member 9 of the circuit breaker includes a pin 8 provided on and protruding from one end of the moving member 9. The moving part 9 is, for example, a transmission part, which is connected between a transmission crank arm 10 connected with the insulating pull rod and the main shaft, and moves up and down under the driving of the main shaft in the brake opening process. As shown in fig. 4, when the circuit breaker is not opened, the moving part 9 is moved away from the extension part 6 of the damping device by the main shaft of the circuit breaker, and the damping main body 3 is maintained in the initial stationary state by the weight 7. As shown in fig. 5, when the circuit breaker is opened, the moving part 9 moves downward by the main shaft, hits the extension part 6 through the pin 8 and transfers energy to the damping body 3 to rotate and vibrate the damping body 3 around the pin 5, thereby ensuring that the moving part 9 stops moving and the moving part 9 oscillates only in a small range.

For example, the cushion body is made of metal, has a block-like structure, and thus has high strength, and maintains good performance without being broken in the event of being subjected to long-term impact. In addition, the metal still has excellent performance at low temperature.

The buffer device absorbs the redundant energy generated when the breaker is opened, can effectively inhibit the overshoot and rebound during the opening of the breaker, improves the performance of the breaker at low temperature and prolongs the service life of the breaker. In addition, the buffering device is simple and compact in structure, parts in the circuit breaker are greatly reduced, assembly and adjustment of the circuit breaker are simplified, and cost is saved.

The technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the present invention to achieve the purpose of the present invention.

Claims

1. The utility model provides a buffer of circuit breaker, its characterized in that, buffer sets up on the casing of circuit breaker and including buffering main part, and buffering main part includes the extension, wherein, when the circuit breaker is opened, the moving part striking of circuit breaker the extension and with energy transfer to buffering main part, so that buffering main part is rotatory and the vibration.

2. The cushioning device of claim 1, wherein said cushioning body is made of metal.

3. An impact-attenuating device according to claim 1, wherein the impact-attenuating body further comprises a weight member disposed remotely from the extension.

4. The snubber assembly of claim 1, further comprising a mounting bracket and a pin, wherein the snubber body is disposed on the mounting bracket via the pin and is rotatable about the pin, and wherein the mounting bracket is disposed on a housing of the circuit breaker.

5. A circuit breaker, characterized in that it comprises a damping device according to any one of the preceding claims.

6. The circuit breaker of claim 5, wherein the circuit breaker includes a moving member, and the moving member includes a pin provided on one end thereof and protruding, wherein the pin strikes an extension of a buffer body of the buffer device when the circuit breaker is opened.