CN219370947U - Breaker energy absorption structure and breaker - Google Patents

Abstract

The application relates to an energy absorption structure of a circuit breaker and the circuit breaker, comprising an energy absorption ring, wherein the energy absorption ring is arranged at the connecting end of an upper connecting rod and a lower connecting rod of the circuit breaker, and can buffer and limit the two connecting rods when the included angle between the two connecting rods reaches a set threshold value; when closing, the connection ends of the two connecting rods move to the concave surface features of the circuit breaker fixing lever. Above-mentioned circuit breaker energy-absorbing structure and this circuit breaker, when the circuit breaker carries out the action of closing a floodgate, go up connecting rod and lower connecting rod junction and can remove to the concave surface characteristic department of fixed lever, when the connecting rod laminating in concave surface characteristic, the energy-absorbing ring can absorb the connecting rod and remove unnecessary spring energy of laminating in-process, reduce the connecting rod and because of the spring that rigid contact produced after closing a floodgate, increase the relief angle design threshold value between two connecting rods, further reduce because of the connecting rod passes the dead point after continuing the contact pressure attenuation that produces, make the contact of moving, stationary contact more reliable and stable, improved the life of mechanism.

Description

Breaker energy absorption structure and breaker

Technical Field

The application relates to the technical field of piezoelectric devices, in particular to an energy absorption structure of a circuit breaker and the circuit breaker.

Background

Circuit breakers are the most important power distribution equipment in low voltage power distribution systems, and with the development of power engineering, the requirements for short-tolerance performance for circuit protection switches are also increasing. However, the higher short tolerance requirement means that the mechanism needs to output more energy to close the switch, so that excessive residual energy can impact the mechanism, resulting in a reduced life of the mechanism. In particular, in recent years, new energy fields such as photovoltaic and wind power are rising, and frequent switching operations of the circuit breaker are required, which requires a mechanism of the circuit breaker to have a sufficiently high reliability.

The conventional mechanism for achieving the closing position through rigid contact is subjected to continuous impact in frequent operation, and finally the connecting assembly in the mechanism is damaged, and even the risk of failure possibly exists. Meanwhile, due to the bouncing of the rigid contact, a certain safety angle is required to be reserved between the upper connecting rod and the lower connecting rod after the switching-on, and the contact pressure is attenuated when the switching-on is performed due to the larger safety angle, so that the contact with the fixed contact is affected.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a circuit breaker energy absorbing structure and the circuit breaker capable of absorbing excessive energy and preventing the moving contact from moving beyond the limit.

A circuit breaker energy absorbing structure comprising:

the energy absorption ring is arranged at the connecting end of the upper connecting rod and the lower connecting rod of the circuit breaker, and can buffer and limit the two connecting rods when the included angle between the two connecting rods reaches a set threshold value;

the circuit breaker is characterized in that the other end of the upper connecting rod is connected with the circuit breaker cantilever, an interval is reserved between the upper connecting rod and the cantilever rotation center, the other end of the lower connecting rod is positioned at an axial line position, when closing a switch, the connecting ends of the upper connecting rod and the lower connecting rod can move to the concave surface feature of the circuit breaker fixing lever, and the energy absorption ring can deform when the connecting ends of the upper connecting rod and the lower connecting rod are attached to the concave surface feature.

In one embodiment, the energy absorbing ring comprises an outer sleeve and an elastic sleeve; the elastic sleeve is arranged at one end of one of the upper connecting rod and the lower connecting rod through a fixed shaft, the outer sleeve is sleeved on the elastic sleeve, and the elastic sleeve is abutted against the other connecting rod of the upper connecting rod and the lower connecting rod when the connecting ends of the upper connecting rod and the lower connecting rod are attached to the concave surface feature.

In one embodiment, the outer sleeve is mounted to one end of the other of the upper and lower links.

In one embodiment, the outer sleeve is located on a side of the other of the upper and lower links remote from the concave feature.

In one embodiment, the inner ring of the elastic sleeve is provided with a guide groove, and when the connecting ends of the upper connecting rod and the lower connecting rod are attached to the concave surface features, the connecting lines at two ends of the guide groove are opposite to the concave surface features.

In one embodiment, the guide groove is arranged in a kidney-shaped hole structure.

In one embodiment, the energy absorbing structure further comprises a positioning hole, the positioning hole is formed in the other of the upper connecting rod and the lower connecting rod, the outer sleeve is movably clamped in the positioning hole, and when the connecting ends of the upper connecting rod and the lower connecting rod are attached to the concave surface feature, the connecting ends are abutted to one end of the positioning hole.

In one embodiment, the positioning holes are arranged in an arc-shaped hole structure.

In one embodiment, the portion of the concave feature for conforming to the connecting ends of the upper and lower links is provided with a resilient pad.

A circuit breaker comprising a circuit breaker body and an energy absorbing structure as claimed in any one of the preceding claims.

Above-mentioned circuit breaker energy-absorbing structure and this circuit breaker through last connecting rod and lower connecting rod hookup location department setting up the energy-absorbing ring, when the circuit breaker carries out the combined floodgate action, go up connecting rod and lower connecting rod junction and can remove to the concave surface characteristic department of fixed lever, when the connecting rod laminating in concave surface characteristic, the contained angle between two connecting rods reaches the settlement threshold value promptly, the energy-absorbing ring can absorb the connecting rod and remove unnecessary spring energy of laminating in-process, reduce the spring that the connecting rod produced because of rigid contact after the combined floodgate, increase the relief angle design threshold value between two connecting rods, further reduce because of the connecting rod passes the dead point after continuing the motion and produce contact pressure decay, make the contact of moving, the static contact more reliable and stable, the life of mechanism has been improved.

Drawings

FIG. 1 is a perspective view of an embodiment of an energy absorbing structure application scenario;

FIG. 2 is a schematic plan view of an application scenario of an energy absorbing structure according to an embodiment;

FIG. 3 is an enlarged view of a portion of an energy absorbing structure application scenario of an embodiment;

FIG. 4 is a schematic diagram of an energy absorbing structure of an embodiment;

FIG. 5 is a schematic view of a connecting rod structure of an embodiment;

FIG. 6 is a schematic plan view of another embodiment of an energy absorbing structure.

In the figure: 100. an energy absorbing ring; 110. an outer sleeve; 120. an elastic sleeve; 130. a guide groove; 200. positioning holes; 10. an upper connecting rod; 20. a lower connecting rod; 30. a fixed lever; 31. a concave feature; 40. a closing lever; 50. an energy storage guide rod; 60. an energy storage lever; 70. a cantilever; 80. a moving contact; 90. and (5) a static contact.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used in the description of the present application for purposes of illustration only and do not represent the only embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact of the first feature with the second feature, or an indirect contact of the first feature with the second feature via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

Unless defined otherwise, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The term "and/or" as used in the specification of this application includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 3, in one embodiment, an energy absorbing structure of a circuit breaker includes an energy absorbing ring 100, wherein the energy absorbing ring 100 is installed at a connection end of an upper connecting rod 10 and a lower connecting rod 20 of the circuit breaker, and can buffer and limit the upper connecting rod 10 and the lower connecting rod 20 when an included angle between the two reaches a set threshold; the connecting ends of the upper connecting rod 10 and the lower connecting rod 20 are hinged through a fixed shaft, the other end of the upper connecting rod 10 is connected with the breaker cantilever 70, a gap is reserved between the connecting ends and the rotation center of the cantilever 70, the other end of the lower connecting rod 20 is positioned at an axial position, the other end of the lower connecting rod 20 is hinged with the breaker fixing lever 30, when closing, the connecting ends of the upper connecting rod 10 and the lower connecting rod 20 can move to the concave surface feature 31 of the breaker fixing lever 30, and the energy absorption ring 100 can deform when the connecting ends of the upper connecting rod 10 and the lower connecting rod 20 are attached to the concave surface feature 31.

Specifically, when the switch-on half shaft of the circuit breaker is pushed, the switch-on lever 40 is unlocked and falls into a groove of the switch-on half shaft to rotate, and at the moment, the energy storage spring sleeved on the energy storage guide rod 50 releases energy and enables the energy storage lever 60 to rotationally squeeze the lower connecting rod 20, so that the lower connecting rod 20 rotates anticlockwise, the upper connecting rod 10 is driven to push the cantilever 70 leftwards, the moving contact 80 connected with the cantilever 70 rotates around the other part until the moving contact 80 is attached to the fixed contact 90, and switch-on is completed. During closing, the connection between the upper link 10 and the lower link 20 moves toward the concave feature 31 of the fixed lever 30 until the connection between the upper link 10 and the lower link 20 is at the concave feature 31.

It should be noted that, an included angle is formed between one end of the upper connecting rod 10, which is far away from the lower connecting rod 20, the rotational connection position of the upper connecting rod 10 and the lower connecting rod 20, and one end of the lower connecting rod 20, which is far away from the upper connecting rod 10, when the connection position of the connecting rod 20 is attached to the concave feature 31 under normal conditions, the included angle will often be reduced to be within a safe threshold after passing through the dead point, and the cantilever 70 correspondingly rotates to enable the moving contact 80 to be attached to the fixed contact 90, so that a certain attenuation is generated, and the contact between the moving contact 80 and the fixed contact 90 is affected.

According to the breaker energy absorbing structure, the energy absorbing ring 100 is arranged at the connecting position of the upper connecting rod 10 and the lower connecting rod 20, when the breaker performs a closing action, the connecting position of the upper connecting rod 10 and the lower connecting rod 20 can move towards the concave surface feature 31 of the fixed lever 30, when the connecting position of the upper connecting rod 10 and the lower connecting rod 20 is attached to the concave surface feature 31, namely, the included angle between the two connecting rods reaches the set threshold value, the energy absorbing ring 100 at the connecting position of the upper connecting rod 10 and the lower connecting rod 20 can absorb the excessive bouncing energy in the moving attaching process of the connecting rods, the bouncing of the connecting rods due to rigid contact after closing is reduced, the design threshold value theta of the safety angle between the two connecting rods is increased, the contact pressure attenuation caused by the falling of the cantilever 70 continuously after the connecting rods pass dead points is further reduced, the contact between the movable 80 and the fixed contacts 90 is more stable and reliable, and the service life of the mechanism is prolonged.

As shown in fig. 4, in this embodiment, the energy absorbing ring 100 includes an outer sleeve 110 and an elastic sleeve 120; the elastic sleeve 120 is mounted at one end of one of the joints of the upper and lower links 10 and 20 through a fixed shaft, and the outer sleeve 110 is sleeved on the elastic sleeve 120 and abuts against the other of the joints of the upper and lower links 10 and 20 when the joint of the upper and lower links 10 and 20 abuts against the concave feature 31.

Specifically, when the junction of the upper link 10 and the lower link 20 is fitted to the concave feature 31, the elastic sleeve 120 located in the outer sleeve 110 is deformed, thereby buffering and eliminating rigid bouncing when the two are fitted.

As shown in fig. 5, in the present embodiment, an outer bushing 110 is installed at one end of the other link in the junction of the upper link 10 and the lower link 20.

Specifically, when the junction of the upper link 10 and the lower link 20 is conformed to the concave feature 31, an abutment is generated between the two links, and the force generated by the abutment is weakened or eliminated by the deformation of the elastic sleeve 120.

In this embodiment, the outer sleeve 110 is located on the side of the other link remote from the concave feature 31.

Specifically, as shown in the left side position of energy absorbing ring 100 in FIG. 5, the connection between upper link 10 and lower link 20 is spaced apart from lower link 20 before moving toward concave feature 31, and continuously moves toward lower link 20 during the movement of the connection between the links toward concave feature 31. When the junction of the upper and lower links 10, 20 is fitted to the concave feature 31, the outer sleeve 110 of the energy absorbing ring 100 will abut against the side of the lower link 20 remote from the concave feature, thereby cushioning and eliminating the rigid bounce created during abutment.

In this embodiment, the inner ring of the elastic sleeve 120 is provided with a guiding groove 130, and when the connection between the upper connecting rod 10 and the lower connecting rod 20 is attached to the concave feature 31, the connection line between the two ends of the guiding groove 130 is opposite to the concave feature 31.

Specifically, by arranging the connection line between the two ends of the guiding groove 130 opposite to the concave feature 31, when the connection part of the upper connecting rod 10 and the lower connecting rod 20 is attached to the concave feature 31, the connection part is affected by the direction of the guiding groove 130, wherein the corresponding connecting rod moves along the two axial directions of the guiding groove 130 and forces the elastic sleeve 120 to deform, and the arrangement of the structure can effectively control the moving direction of the connecting rod.

In this embodiment, the guide groove 130 is configured in a kidney-shaped hole structure, so that the connection between the outer sleeve 110 and the guide groove 130 is tighter.

As shown in fig. 6, in this embodiment, the energy absorbing structure further includes a positioning hole 200, where the positioning hole 200 is formed on the other of the upper link 10 and the lower link 20, and the outer sleeve 110 is movably clamped in the positioning hole 200, and abuts against one end of the positioning hole 200 when the connection portion of the upper link 10 and the lower link 20 is attached to the concave feature 31.

Specifically, before the connection between the upper link 10 and the lower link 20 moves toward the concave feature 31, the outer sleeve 110 is positioned in the positioning hole 200 or at one end of the positioning hole 200, and when the connection between the upper link 10 and the lower link 20 moves toward the concave feature 31, the outer sleeve 110 approaches the other end of the positioning hole 200 until the connection between the links moves toward the concave feature 31, at this time, the outer sleeve 110 abuts against one end of the positioning hole 200, and the elastic sleeve 120 installed in the outer sleeve 110 can buffer and eliminate the rigid bounce generated when the links contact the concave feature 31.

In this embodiment, the positioning hole 200 is disposed in an arc-shaped hole structure, so that the connection between the outer sleeve 110 and the positioning hole 200 is tighter.

In this embodiment, the portion of the concave feature 31 for conforming to the junction of the upper link 10 and the lower link 20 is provided with a resilient pad.

Specifically, the elastic pad may be fixed at the position of the concave feature 31 by means of adhesion, so as to buffer and eliminate rigid bouncing between the upper link 10 and the lower link 20 when the connection point of the two is abutted against the concave feature 31.

In one embodiment, a circuit breaker includes a circuit breaker body and an energy absorbing structure of any of the above embodiments.

According to the circuit breaker, the energy absorption ring 100 is arranged at the connecting position of the upper connecting rod 10 and the lower connecting rod 20, when the circuit breaker performs a closing action, the connecting position of the upper connecting rod 10 and the lower connecting rod 20 can move towards the concave surface feature 31 of the fixed lever 30, when the connecting rods are attached to the concave surface feature 31, namely, the included angle between the two connecting rods reaches a set threshold value, the energy absorption ring 100 can absorb redundant bouncing energy in the moving attaching process of the connecting rods, the problem that the cantilever 70 moves beyond the range due to rigid contact bouncing or excessive electric repulsion after closing is avoided, the contact between the movable contact 80 and the fixed contact 90 is influenced, meanwhile, frequent actions of a mechanism are avoided, and the service life of the mechanism is prolonged.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. An energy absorbing structure for a circuit breaker, comprising:

the energy absorption ring is arranged at the connecting end of the upper connecting rod and the lower connecting rod of the circuit breaker and can buffer and limit the upper connecting rod and the lower connecting rod when the included angle between the upper connecting rod and the lower connecting rod reaches a set threshold value;

the circuit breaker is characterized in that the other end of the upper connecting rod is connected with the circuit breaker cantilever, an interval is reserved between the upper connecting rod and the cantilever rotation center, the other end of the lower connecting rod is positioned at an axial line position, when closing, the connecting ends of the upper connecting rod and the lower connecting rod can move to the concave surface feature of the circuit breaker fixing lever, and the energy absorption ring can deform when the connecting ends of the upper connecting rod and the lower connecting rod are attached to the concave surface feature.

2. The energy absorbing structure of a circuit breaker of claim 1, wherein the energy absorbing ring comprises an outer sleeve and an elastic sleeve, the elastic sleeve being mounted to one end of one of the upper and lower links by a fixed shaft, the outer sleeve being sleeved over the elastic sleeve and abutting the other of the upper and lower links when the connecting ends of the upper and lower links are in engagement with the concave feature.

3. The energy absorbing structure of a circuit breaker of claim 2, wherein the outer bushing is mounted at one end of the other of the upper and lower links.

4. The circuit breaker energy absorbing structure of claim 2, wherein the outer bushing is located on a side of the other of the upper and lower links that is remote from the concave feature.

5. The energy absorbing structure of a circuit breaker according to claim 3 or 4, wherein the inner ring of the elastic sleeve is provided with a guiding groove, and when the connecting rod is attached to the concave feature, the connecting line at two ends of the guiding groove is opposite to the concave feature.

6. The energy absorbing structure of a circuit breaker of claim 5, wherein the guide slot is configured in a kidney-shaped aperture configuration.

7. The energy absorbing structure of a circuit breaker of claim 2, further comprising a locating hole formed in the other of the upper and lower links, the outer hub movably snapped into the locating hole and abutting against one end of the locating hole when the link is attached to the concave feature.

8. The energy absorbing structure of a circuit breaker of claim 7, wherein the locating holes are arranged in an arcuate hole-like configuration.

9. The energy absorbing structure of a circuit breaker of claim 1, wherein the portion of the concave feature for conforming to the connecting ends of the upper and lower links is provided with a resilient pad.

10. A circuit breaker comprising a circuit breaker body and an energy absorbing structure according to any one of claims 1 to 9.