CN215869099U - Rebound prevention device and isolating switch - Google Patents

Abstract

The application discloses prevent resilient mounting and isolator relates to the electrical technology field. This prevent resilient mounting includes the casing, and the runing rest that the casing internal rotation set up, the runing rest is used for setting up the moving contact, be provided with the locating part on the runing rest, the correspondence is provided with the elastic component in the casing, so that during the runing rest separating brake, the locating part can be crossed the elastic component, and will the locating part restriction is crossing position behind the elastic component. The arc reignition caused by the rebound of the moving contact can be prevented, and the breaking reliability of the product can be improved.

Description

Rebound prevention device and isolating switch

Technical Field

The application relates to the field of electrical technology, in particular to an anti-rebound device and a disconnecting switch.

Background

The electrical switch generally plays a role in safety isolation in the whole power distribution system, and needs higher short-circuit bearing capacity and short-circuit connection and disconnection capacity in many application scenes. Particularly, an electric arc generated in a breaking process of a high voltage is not easily and rapidly extinguished, so that the moving contact and the static contact are seriously burnt, the electrical performance of the electrical switch is finally failed, and serious accidents such as fire disasters and the like can be caused in serious cases.

In order to avoid such a situation, measures of increasing the opening speed and increasing the opening distance of the moving contact are usually taken, but increasing the opening speed often increases the force value of a spring in the operating mechanism, greatly affects the difficulty of manufacturing and processing the spring, the operating life of the mechanism and the operating experience of a user, and has a limited improvement. Wherein, it is a more effectual measure to increase the separating brake opening distance, but the turned angle of moving contact is subject to the operating device angle, just must utilize its rotation inertia to set up free stroke at the separating brake end in order to realize that moving contact turned angle is greater than operating device motion angle, and this also has the moving contact and produces the resilience through free stroke to the restriction position after, and the moving contact resilience can lead to the relighting of electric arc, causes the repeated burning loss of moving contact.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a prevent resilient mounting and isolator, can prevent that the moving contact kick-backs the electric arc that arouses and restrike, be favorable to improving the disconnected reliability of product.

The embodiment of the application is realized as follows:

one aspect of the embodiment of the application provides an anti-rebounding device, including the casing, and the runing rest that the casing internal rotation set up, runing rest is used for setting up the moving contact, be provided with the locating part on the runing rest, the correspondence is provided with the elastic component in the casing, so that during the runing rest separating brake, the locating part can be crossed the elastic component, and will the locating part restriction is crossing position behind the elastic component.

Optionally, the locating part is including setting up baffle on the runing rest, be provided with the direction inclined plane on the baffle, the elastic component include with the bellying that the baffle corresponds, the direction inclined plane is including the side of cutting into and the roll-off side that sets up relatively, cut into the side with the distance between the bellying is greater than the roll-off side with the distance between the roll-off side.

Optionally, the elastic member includes an extension portion connected to the protrusion portion, and the extension portion is located at two opposite sides of the protrusion portion.

Optionally, the elastic member is a spring plate, and the elastic member is integrally formed.

Optionally, a limiting groove is formed in the housing, and the elastic member is inserted into the limiting groove.

Optionally, a blocking wall is further disposed in the housing, and a preset distance is provided between the blocking wall and the protruding portion.

Optionally, the relative both sides of baffle be provided with respectively with the otic placode that the baffle is connected, the otic placode with be preset contained angle between the baffle.

Optionally, the elastic member is symmetrically arranged relative to the rotating bracket, and the baffle plates are arranged on the rotating bracket in a central symmetry manner.

Optionally, the protrusion is any one of trapezoidal, triangular or parabolic.

On the other hand of this application embodiment provides an isolator, including divide-shut brake control assembly, and with at least one contact subassembly that divide-shut brake control assembly is connected, wherein, the contact subassembly includes as above arbitrary one prevent resilient mounting.

The beneficial effects of the embodiment of the application include:

the embodiment of the application provides a prevent resilient mounting and isolator through the casing and the runing rest that supplies the setting in the casing specially, the runing rest is used for setting up the moving contact, when the relative casing of runing rest rotates, can drive the moving contact and rotate in step. Therefore, the opening or closing operation between the moving contact and the fixed contact can be controlled through the rotation of the moving support. Through set up the locating part on rotating movable support to and correspond in the casing and set up the elastic component, rotating movable support rotation in-process, the locating part can cooperate with the elastic component, so that when carrying out the separating brake through rotating movable support, the elastic component can be crossed to the locating part, guarantees reliable separating brake between moving contact and the static contact. After the separating brake is completed, the moving contact rebounds under the rebounding action force, the limiting part reaches the elastic part again, at the moment, the action force applied to the elastic part by the limiting part cannot enable the elastic part to deform to the limiting part to cross the space required by the elastic part again, and therefore the limiting part is limited to cross the position behind the elastic part when the separating brake is performed. By adopting the form, the arrangement form can be simplified, the electric arc reignition caused by the rebound of the moving contact can be prevented, and the improvement of the breaking reliability of the product is facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of an antirebound device according to an embodiment of the present disclosure;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic structural diagram of a rotating bracket according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of an elastic member according to an embodiment of the present disclosure;

fig. 5 is a second schematic structural view of the rebound preventing device according to the embodiment of the present application;

FIG. 6 is a partial enlarged view of FIG. 5 at B;

fig. 7 is a third schematic structural diagram of an antirebound device according to an embodiment of the present application;

FIG. 8 is an enlarged view of a portion of FIG. 7 at C;

fig. 9 is a schematic structural diagram of a disconnecting switch provided in an embodiment of the present application.

Icon: 110-a housing; 112-a limiting groove; 114-a retaining wall; 120-rotating the support; 122-moving contact; 124-baffle plate; 1242-guide surface; 1242 a-incised side; 1242 b-slide out side; 126-ear plate; 130-an elastic member; 132-a boss; 200-an isolating switch; 210-a switching-on and switching-off control component; 220-contact assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in 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 obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The electric arc generated by the electric switch in the breaking process of high voltage is not easy to extinguish quickly, which can cause serious burning loss of the moving contact and the static contact, finally cause the electrical property failure of the electric switch, and possibly cause serious accidents such as fire and the like when serious. In order to avoid the occurrence of the situation, measures of increasing the opening speed and increasing the opening distance of the moving contact are usually taken, wherein the increase of the opening distance is an effective measure, but the rotating angle of the moving contact is limited by the angle of the operating mechanism, the rotating inertia of the moving contact is inevitably utilized to set a free stroke at the opening end in order to realize that the rotating angle of the moving contact is greater than the motion angle of the operating mechanism, the moving contact rebounds after passing through the free stroke to the limit position, the rebounding of the moving contact can lead to the reignition of the electric arc, and the repeated burning loss of the moving contact is caused. The embodiment of the application provides the following scheme, which can prevent the reignition of the electric arc caused by the rebound of the moving contact and is beneficial to improving the breaking reliability of a product.

Referring to fig. 1, 2 and 3, the embodiment provides a rebound-prevention device, which includes a housing 110, and a rotating bracket 120 rotatably disposed in the housing 110, wherein the rotating bracket 120 is used for disposing a movable contact 122, the rotating bracket 120 is provided with a limiting member, and an elastic member 130 is correspondingly disposed in the housing 110, so that when the rotating bracket 120 is opened, the limiting member can pass over the elastic member 130, and the limiting member is limited to a position after passing over the elastic member 130.

Specifically, in order to ensure the stability of the rotation of the rotating bracket 120 in the housing 110, a circular groove may be correspondingly disposed in the housing 110, and the rotating bracket 120 may be correspondingly disposed in a circular shape, so that the rotating bracket 120 and the housing 110 are better matched with each other. The rotating bracket 120 is provided with a moving contact 122, and when the rotating bracket 120 rotates, the moving contact 122 is driven to rotate synchronously, so that the moving contact 122 can be contacted with or separated from a static contact arranged in the housing 110.

By arranging the limiting member on the rotating bracket 120 and correspondingly arranging the elastic member 130 in the housing 110, the limiting member can cross the elastic member 130 to smoothly open the brake during the brake opening operation process by driving the moving contact 122 to move through the rotating bracket 120. After the opening process, the moving contact 122 is in reverse motion due to the resilience force, the limiting member is in contact with the elastic member 130, but the resilience force is not enough to overcome the elastic force of the elastic member 130, and the elastic member 130 cannot be deformed until the limiting member can cross the space required by the elastic member 130 again, so that the limiting member is limited to the position after crossing the elastic member 130, and thus, the arc reignition caused by the rebound of the moving contact 122 can be prevented.

The anti-rebound device provided by the embodiment of the application is provided with the rotating support 120 which is specially arranged in the shell 110 through the shell 110, the rotating support 120 is used for arranging the moving contact 122, and when the rotating support 120 rotates relative to the shell 110, the moving contact 122 can be driven to synchronously rotate. Thus, the opening or closing operation between the moving contact 122 and the fixed contact can be controlled by the rotation of the moving bracket. By arranging the limiting member on the rotating bracket 120 and correspondingly arranging the elastic member 130 in the housing 110, in the rotating process of the rotating bracket 120, the limiting member can be matched with the elastic member 130, so that when the brake is switched off through the rotating bracket 120, the limiting member can cross the elastic member 130, and reliable switching off between the moving contact 122 and the fixed contact is ensured. After the opening process is completed, the moving contact rebounds under the rebounding action force, the limiting member reaches the elastic member 130 again, at this time, the action force applied to the elastic member 130 by the limiting member cannot deform the elastic member 130 to a space where the limiting member can cross the elastic member 130 again, so that the limiting member is limited to a position where the limiting member crosses the elastic member 130 when the opening process is completed. By adopting the above form, the arrangement form can be simplified, and the reignition of the arc caused by the rebound of the movable contact 122 can be prevented, which is beneficial to improving the reliability of product breaking.

As shown in fig. 3 and 4, the limiting member includes a blocking plate 124 disposed on the rotating bracket 120, a guide surface 1242 is disposed on the blocking plate 124, the elastic member 130 includes a protrusion 132 corresponding to the blocking plate 124, the guide surface 1242 includes a cut-in side 1242a and a slide-out side 1242b disposed opposite to each other, and a distance between the cut-in side 1242a and the protrusion 132 is greater than a distance between the slide-out side 1242b and the slide-out side 1242 b.

Specifically, the stop plate 124 of the rotating bracket 120 may also be a boss, which is mainly used to cooperate with the protrusion 132 of the elastic member 130. The height of the baffle 124 can be flexibly set according to the specific position of the elastic member 130 in the housing 110, as long as the two are matched. It should be noted that the arrangement form of the guide surface 1242 is not specifically limited in the embodiment of the present application, and for example, the guide surface 1242 may be a plane, and may also be a curved surface, as long as the stability of the fit between the baffle 124 and the elastic element 130 can be ensured.

In the above manner, during the process of opening the movable contact 122 by the rotating bracket 120, the blocking plate 124 gradually approaches the elastic portion until the blocking plate 124 is about to contact the elastic member 130 (as shown in fig. 5 and 6). At this time, since the distance between the cut-in side 1242a of the guide surface 1242 and the protrusion 132 is larger, the cut-in side 1242a can contact the guide surface 1242 without touching the protrusion 132, and the protrusion 132 is forced to deform under the action of the guide surface 1242, so that the blocking plate 124 can easily pass over the protrusion 132 to achieve the opening. After the opening is completed, the rotating bracket 120 drives the flap 124 to rotate reversely under the influence of the rebounding force, so that the flap 124 approaches the protrusion 132 of the elastic member 130 again until the flap 124 contacts the protrusion 132 (as shown in fig. 7 and 8). At this time, since the distance between the sliding-out side 1242b of the guide surface 1242 and the protrusion 132 is smaller, the sliding-out side 1242b abuts against the protrusion 132, the guide surface 1242 cannot directly contact with the protrusion 132, and interference between the baffle 124 and the protrusion 132 is blocked, and the protrusion 132 cannot be deformed by the acting force until the baffle 124 can pass through, so that the rebound of the movable contact 122 is limited. When it is necessary to drive the moving contact 122 to close the switch through the rotating bracket 120, an operating force provided by the switching operation is greater than a rebounding acting force, and at this time, the baffle 124 and the protrusion 132 are abutted to deform the protrusion 132 under a stress, so as to achieve the switching operation.

As shown in fig. 4, the elastic member 130 includes extensions connected to the protrusions 132, and the extensions are located at opposite sides of the protrusions 132.

With the above-described form, the elastic member 130 is facilitated by the extension portion connected to the boss portion 132 through the engagement between the extension portion and the housing 110, and the structure of the elastic member 130 itself is more stable. It should be noted that, in the embodiment of the present application, there is no particular limitation on the arrangement form of the extension portion, and for example, the extension portion may be arranged in a planar structure or a curved structure. In addition, the extension parts on both sides of the protrusion may adopt the same structure form, or may adopt different structure forms, and for example, the extension parts may be set to have equal length or unequal length, so that the cooperation between the elastic element 130 and the housing 110 is more convenient and reliable.

In an alternative embodiment of the present application, the elastic member 130 is a spring plate, and the elastic member 130 is integrally formed.

Specifically, when the elastic member 130 is a spring plate, the spring plate may be directly bent to form the elastic member 130 as an integral structure. In this way, it is advantageous to simplify the arrangement of the elastic member 130, thereby facilitating the assembly connection between the elastic member 130 and the housing 110.

As shown in fig. 2, a limiting groove 112 is formed in the housing 110, and the elastic member 130 is inserted into the limiting groove 112.

Specifically, by providing the limiting groove 112 in the housing 110, when the elastic member 130 and the housing 110 are assembled, the elastic member 130 can be directly inserted into the limiting groove 112, so that the elastic member 130 is limited by the limiting groove 112, and the stability of the relative position of the elastic member 130 and the housing 110 is ensured.

With continued reference to fig. 2, a blocking wall 114 is further disposed in the housing 110, and a predetermined distance is provided between the blocking wall 114 and the protrusion 132.

Specifically, the blocking wall 114 is arranged in the housing 110, and after the moving contact 122 is driven by the rotating support 120 to rotate and open the brake, the blocking plate 124 on the rotating support 120 can be abutted against the blocking wall 114, so that the rotating support 120 is limited, and the rotating support 120 is ensured to move in a specific rotating interval. Meanwhile, in the process of making contact between the blocking wall 114 and the blocking plate 124 and then making the movable contact 122 rebound, because the blocking wall 114 and the protruding portion 132 have a preset distance, part of the rebound force can be consumed in the process that the rotating bracket 120 drives the blocking plate 124 to rotate to the protruding portion 132, so that the residual rebound force cannot drive the blocking plate 124 to drive the protruding portion 132 to deform under stress, and the breaking reliability can be ensured.

As shown in fig. 3, the two opposite sides of the baffle 124 are respectively provided with an ear plate 126 connected with the baffle 124, and a predetermined included angle is formed between the ear plate 126 and the baffle 124.

Specifically, the ear plates 126 connected with the baffle plate 124 are respectively arranged on the two opposite sides of the baffle plate 124, so that the baffle plate 124 is supported and fixed, the deformation of the baffle plate 124 is reduced, and the service life of the baffle plate 124 is prolonged. In addition, the ear plate 126 and the baffle plate 124 are arranged in a preset included angle, so that the static contact can be enclosed in a space formed by the baffle plate 124 and the ear plate 126, the arc discharge distance of an electric arc generated at the static contact can be increased, the electric arc can be rapidly extinguished, and the stability in use can be ensured.

As shown in fig. 5, the elastic member 130 is symmetrically disposed with respect to the rotating bracket 120, and the blocking plate 124 is centrally symmetrically disposed on the rotating bracket 120.

Specifically, the rotating bracket 120 is rotatably connected with the housing 110, and the moving contact 122 is disposed in the rotating bracket 120 in a penetrating manner, so that opposite ends of the moving contact 122 protrude from the rotating bracket 120, and a double-breakpoint structure is formed. By arranging the elastic member 130 symmetrically with respect to the rotating bracket 120, it is beneficial to apply more uniform force to the baffle 124 arranged on the rotating bracket 120 when the baffle cooperates with the elastic member 130. It will be appreciated that the flap 124 is arranged centrally symmetrically on the support to facilitate a better fit between the flap 124 and the resilient member 130.

In alternative embodiments of the present application, the protrusions 132 are any one of trapezoidal, triangular, or parabolic.

Specifically, the protruding portion 132 may be set to be trapezoidal, triangular or parabolic according to actual needs and manufacturing process difficulty, as long as it can be stably matched with the baffle 124.

As shown in fig. 9, the embodiment of the present application further discloses a disconnecting switch 200, which includes a switching-closing control assembly 210, and at least one contact assembly 220 connected to the switching-closing control assembly 210, where the contact assembly 220 includes the anti-rebound device in the foregoing embodiment. The disconnector 200 comprises the same construction and advantages as the antirebound device in the previous embodiment. The structure and advantages of the rebound-prevention device have been described in detail in the foregoing embodiments, and are not described in detail herein.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The utility model provides an anti-rebound device, its characterized in that, includes the casing, and the runing rest that the casing internal rotation set up, the runing rest is used for setting up the moving contact, be provided with the locating part on the runing rest, the correspondence is provided with the elastic component in the casing, so that during the runing rest separating brake, the locating part can be crossed the elastic component, and will the locating part restriction is crossing position behind the elastic component.

2. The rebound prevention device as set forth in claim 1, wherein the limiting member comprises a baffle disposed on the rotating bracket, a guide surface is disposed on the baffle, the elastic member comprises a boss corresponding to the baffle, the guide surface comprises an incision side and a slip-out side disposed opposite to each other, and a distance between the incision side and the boss is greater than a distance between the slip-out side and the slip-out side.

3. The antirebound device of claim 2 wherein the spring includes extensions connected to the boss and located on opposite sides of the boss.

4. The antirebound device of claim 3 wherein the resilient member is a leaf spring and the resilient member is integrally formed.

5. The antirebound device of any one of claims 1-4 wherein a retaining groove is provided in the housing, the resilient member being inserted in the retaining groove.

6. The antirebound device of any one of claims 2-4 wherein a stop wall is further provided within the housing, the stop wall being a predetermined distance from the boss.

7. The rebound-prevention device as set forth in any one of claims 2 to 4, wherein the baffle is provided with lugs connected to the baffle at opposite sides thereof, and the lugs and the baffle form a predetermined included angle therebetween.

8. The antirebound device of any one of claims 2-4 wherein the resilient member is symmetrically disposed about the rotatable support and the stop plate is centrally symmetrically disposed on the rotatable support.

9. The antirebound device of any one of claims 2-4 wherein the raised portion is any one of trapezoidal, triangular or parabolic.

10. An isolating switch, characterized by comprising a switching-closing control assembly and at least one contact assembly connected with the switching-closing control assembly, wherein the contact assembly comprises the rebound prevention device according to any one of claims 1 to 9.

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