CN222672924U - Auxiliary switch and universal circuit breaker - Google Patents

Abstract

The application discloses an auxiliary switch and a universal circuit breaker, wherein the auxiliary switch comprises at least one switch group, each switch group comprises a switch shell, a push rod and at least one group of contact assemblies, the push rod and the switch shell are arranged in a sliding mode, one end of the push rod penetrates into the switch shell, the other end of the push rod is exposed out of the shell, the contact assemblies comprise normally closed contact groups and normally open contact groups, normally closed movable contact bridges of the normally closed contact groups and normally open movable contact bridges of the normally open contact groups are arranged on the push rod to move along with the push rod, the sliding of the push rod realizes state transition of the normally closed contact groups and the normally open contact groups, and all contact surfaces in the normally closed contact groups and the normally open contact groups are knurled surfaces.

Description

Auxiliary switch and universal circuit breaker

Technical Field

The application relates to the field of electricity, in particular to an auxiliary switch of a circuit breaker.

Background

In the field of circuit breakers, in order to realize feedback of signals, a travel switch is often adopted as an auxiliary switch.

A contactor with a switching auxiliary pole as disclosed in CN115798992a is a common auxiliary switch, however, the contact surfaces of the contacts of the existing switch are all plane, and some oil stains, dirt and the like are easy to adhere to such plane, so that the contact performance of the contact may be affected when the contact is used, and the electrical corrosion resistance of the contact is reduced.

Therefore, how to design an auxiliary switch with relatively high electric corrosion resistance is a research-worthy direction.

Disclosure of Invention

In view of the above, the present application aims to overcome the defects in the prior art, and aims to provide an auxiliary switch and a universal circuit breaker.

The application provides an auxiliary switch, which comprises at least one switch group, wherein each switch group comprises a switch shell, a push rod and at least one group of contact assemblies, the push rod and the switch shell are arranged in a sliding mode, one end of the push rod penetrates into the switch shell, the other end of the push rod is exposed out of the shell, the contact assemblies comprise normally closed contact groups and normally open contact groups, normally closed movable contact bridges of the normally closed contact groups and normally open movable contact bridges of the normally open contact groups are arranged on the push rod to move along with the push rod, the sliding of the push rod realizes state transition of the normally closed contact groups and the normally open contact groups, and all contact surfaces in the normally closed contact groups and the normally open contact groups are knurled surfaces.

With this structure, since each contact surface is a knurled surface having a concave portion and a convex portion, even if some oil dirt or dirt is present on the contact surface, the oil dirt falls into the concave portion of the knurled surface. When the two corresponding contact surfaces are gradually close to each other, the convex parts of the knurled surfaces are conductive, and under the action of the electric arc, even if some greasy dirt and dirt exist in the concave parts, the concave parts can be blown open under the action of the electric arc. Thus, such a structure improves the electroerosion ability.

In some embodiments of the application, the knurling pattern of the knurled surface is straight or diagonal.

There are many common knurling patterns, and the knurling patterns have good electric conductivity and electric corrosion resistance in the form of straight lines or diagonal lines.

In some embodiments of the application, the number of the switch groups is at least two, the switch groups are sequentially stacked, each switch group is provided with an outgoing conductor connected with the internal normally closed contact group and the normally open contact group, and the colors of the outgoing conductors of the two adjacent switch groups are different.

By adopting the structure, the auxiliary switches are often arranged in parallel in a plurality of groups, and the colors of the lead wires between every two adjacent groups of switch groups are different, so that the auxiliary switches are very convenient for users to connect wires, and the users are prevented from being connected by mistake.

In some embodiments of the application, the normally closed contact group further comprises a normally closed static contact bridge I and a normally closed static contact bridge II, the normally open contact group further comprises a normally open static contact bridge I and a normally open static contact bridge II, the lead-out wires comprise a lead-out wire I, a lead-out wire II and a lead-out wire III, the normally closed static contact bridge I and the normally open static contact bridge I are integrated, the connection part of the normally closed static contact bridge I and the normally open static contact bridge I is welded with one end of the lead-out wire I, the other end of the lead-out wire I penetrates out of the switch shell, one end of the lead-out wire II is welded with the normally closed static contact bridge II, the other end of the lead-out wire III penetrates out of the switch shell, and the colors of the lead-out wires of the same switch group are the same.

By adopting the arrangement of the structure, the connection between each lead-out wire and the corresponding static contact bridge is facilitated.

In some embodiments of the application, the switch housing comprises a base, a mounting cavity is formed in the base, a partition board I and a partition board II are arranged in the mounting cavity, the partition board I and the partition board II divide the mounting cavity into a lead cavity I, a contact cavity and a lead cavity II, one end of a lead I is positioned in the lead cavity I, the other end of the lead I penetrates out of the side wall of the switch housing, one ends of a lead II and a lead III are positioned in the lead cavity II, and the other ends of the lead II and the lead III penetrate out of the side wall of the switch housing.

By adopting the arrangement of the structure, the welding part of the lead wire can be separated from the contact part of each static contact bridge, and the influence on the contact part caused by the welding of the lead wire is avoided.

In some embodiments of the application, the normally closed static contact bridge I and the normally open static contact bridge I are formed into a U-shaped structure, the partition board I is arranged on the inner side of the U-shaped structure and is tightly attached to the U-shaped structure, and the partition board II is arranged between the normally closed static contact bridge II and the normally open static contact bridge II.

By adopting the design of the structure, each static contact bridge is more compact, and the internal structure is more reasonable.

In some embodiments of the application, at least two switch groups are arranged in a stacked manner, wherein the push rod of one switch group is a master push rod, the push rods of the other switch groups are slave push rods, the master push rod is provided with a first abutting surface, and the slave push rod is provided with a second abutting surface, and the first abutting surface is contacted with the second abutting surface so as to drive the slave push rods to slide together when the master push rod slides.

By adopting the structure, the transmission relation among the switch groups can be effectively realized.

In some embodiments of the application, a return spring is also included between the push rod and the switch housing, and/or a roller is provided on an end of the push rod exposed outside the housing.

The design of the reset spring is favorable for resetting the push rod, and the design of the roller wheel reduces the impact force received by the push rod.

In some embodiments of the application, the switch shell comprises a base and a surface cover, wherein a mounting cavity is arranged in the base, the normally closed contact set and the normally open contact set are arranged in the mounting cavity, the surface cover is fastened with the base through bolts and nuts, and the surface cover is used for sealing an opening of the mounting cavity.

The switch shell can be conveniently detached by adopting the matching of the bolts and the nuts, and a user can more conveniently overhaul each contact assembly in the auxiliary switch.

A universal circuit breaker comprises the auxiliary switch.

The auxiliary switch of the universal circuit breaker adopting the structure has better electric corrosion resistance and improves the stability of the universal circuit breaker.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a perspective view of an auxiliary switch according to an embodiment of the present application;

FIG. 2 illustrates a front view of an auxiliary switch according to an embodiment of the present application;

FIG. 3 shows a block diagram of a base in an auxiliary switch according to an embodiment of the present application;

FIG. 4 is a schematic diagram showing a structure of one group of contact assemblies in the auxiliary switch according to the embodiment of the present application;

FIG. 5 shows a schematic view of the contact surface in an auxiliary switch according to an embodiment of the present application;

FIG. 6 shows a relationship diagram between a master pushrod and a slave pushrod in an auxiliary switch according to an embodiment of the present application.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

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 one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "electrically connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact 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 level higher 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 below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples

As shown in fig. 1-6, an embodiment of the present application is an auxiliary switch that includes multiple switch sets. In this embodiment, the auxiliary switch includes two switch sets, each including a switch housing, a push rod 200, and at least one set of contact assemblies. The internal structure is substantially identical regardless of the switch set, with only a slight difference in the structure of the push rod 200. In order to distinguish the two switch groups, they are referred to as a first switch group S1 and a second switch group S2, respectively.

Taking the first switch set S1 as an example,

The first switch set S1 includes a switch housing, a push rod 200, and two sets of contact members.

The switch housing includes a base 100 and a cover 101, wherein the cover 101 is transparent and fastened by a bolt 102 passing through a nut 103 when the base 100 and the cover 101 are fastened.

Two mounting cavities 104 are provided on the base 100, the two mounting cavities 104 are arranged up and down, and a group of contact assemblies is arranged in each mounting cavity 104. The push rod 200 is slidably inserted on the base 100, one end of the push rod is exposed outside the base 100, each movable contact bridge in the contact assembly is fixed on the push rod 200, and the state in the contact assembly can be changed by pushing the push rod 200.

Taking a contact assembly in one of the installation cavities 104 as an example, the contact assembly comprises a normally closed contact set 301 and a normally open contact set 302, wherein the normally closed contact set 301 comprises a normally closed movable contact bridge 301a, a normally closed static contact bridge I301b and a normally closed static contact bridge II301c, and the normally open contact set 302 comprises a normally open contact bridge 302a, a normally open static contact bridge I302b and a normally open static contact bridge II302c. The normally closed movable contact bridge 301a and the normally open movable contact bridge 302a are fixed on the push rod 200, and the states of the normally closed contact group 301 and the normally open contact group 302 are changed along with the movement of the push rod 200. For example, the set of contacts that were originally normally closed are now separated and the set of contacts that were originally normally open are now in contact.

Here, there is a contact surface J100 between the normally-open movable contact bridge 302a and the normally-open static contact bridge I302b, a contact surface J100 between the normally-open movable contact bridge 302a and the normally-open static contact bridge II302c, a contact surface J100 between the normally-closed movable contact bridge 301a and the normally-closed static contact bridge I301b, and a contact surface J100 between the normally-closed movable contact bridge 301a and the normally-closed static contact bridge II301c, where all the contact surfaces J100 are knurled surfaces. The knurled surface means that the surface is not a flat surface, but a pattern of the convex portion J1001 and the concave portion J1002 is present thereon. The knurling pattern of the knurled surface is many, and in this embodiment, the knurling pattern is straight, but may be diagonal.

Also inside the mounting chamber 104 are a partition I105 and a partition II106, where the partition I105 and the partition II106 are integral with the base 100. The mounting chamber 104 can be substantially partitioned into a lead chamber I104a, a contact chamber 104b, and a lead chamber II104c by a partition I105 and a partition II 106.

Here, the normally closed static contact bridge I301b and the normally open static contact bridge I302b are integrated, and form a U-shaped structure, and the separator I105 is located inside the U-shaped structure and is tightly attached to the U-shaped structure. The normally open static contact bridge II302c and the normally closed static contact bridge II301c are respectively in a straight-line structure, are arranged at intervals, and the partition plate II106 is arranged between the normally open static contact bridge II302c and the normally closed static contact bridge II301 c.

One end of the lead-out wire I400a is positioned in the lead cavity I104a, the other end of the lead-out wire I400a penetrates out of the side wall of the switch shell, and the connection part of the end of the lead-out wire I400a positioned in the lead cavity I104a and the normally-closed static contact bridge I301b and the normally-open static contact bridge I302b is welded and fixed.

One end of the lead-out wire III400c and one end of the lead-out wire II400b are positioned in the lead cavity II104c, and the other end of the lead-out wire II penetrates out of the side wall of the switch shell. The end of the lead wire II400b located in the lead cavity II104c is welded with the normally-closed static contact bridge II301c, and the end of the lead wire III400c located in the lead cavity II104c is welded with the normally-open static contact bridge II302 c.

The colors of the outgoing conductors I400a, III400c, and II400b are the same in the same switch group. Whereas for adjacent switch sets the colors of the outgoing conductors of both are different. For example, as shown in fig. 1, the colors of the lead-out wires I400a, III400C, and II400b in the first switch group S1 are the first color C1, and the colors of the lead-out wires I400a, III400C, and II400b in the second switch group S2 are the second color C2.

In order to realize that the pushed push rod 200 can be reset, a reset spring 500 is further arranged between the base 100 and the push rod 200, wherein the reset spring 500 adopts a pressure spring.

Since the second switch set S2 is different from the first switch set S1 in color, the push rod 200 of the first switch set S1 is hereinafter referred to as a master push rod 200a, and the push rod 200 of the second switch set S2 is a slave push rod 200b. Here, the main push rod 200a is provided with a first abutment surface 200a1, and the sub push rod 200b is provided with a second abutment surface 200b1, and the first abutment surface 200a1 abuts against the second abutment surface 200b1, so that the sub push rod 200b can be driven to slide together when the main push rod 200a is pushed.

Here, a roller 600 is further provided on the main pushrod 200 a.

The auxiliary switch is mainly applied to a universal circuit breaker and used as an auxiliary element.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. The auxiliary switch is characterized by comprising at least one switch group, each switch group comprises a switch shell, a push rod and at least one group of contact assemblies, the push rod and the switch shell are arranged in a sliding mode, one end of the push rod penetrates into the switch shell, the other end of the push rod is exposed out of the shell, the contact assemblies comprise normally closed contact groups and normally open contact groups, normally closed movable contact bridges of the normally closed contact groups and normally open movable contact bridges of the normally open contact groups are arranged on the push rod to move along with the push rod, the sliding of the push rod realizes state transition of the normally closed contact groups and the normally open contact groups, and all contact surfaces in the normally closed contact groups and the normally open contact groups are knurled surfaces.

2. An auxiliary switch as defined in claim 1, wherein the knurling pattern of the knurled surface is straight or diagonal.

3. The auxiliary switch of claim 1, wherein the number of the switch groups is at least two, the switch groups are sequentially stacked, each switch group is provided with a lead-out wire connected with an internal normally-closed contact group and a normally-open contact group, and the colors of the lead-out wires of two adjacent switch groups are different.

4. The auxiliary switch of claim 2, wherein the normally closed contact group further comprises a normally closed static contact bridge I and a normally closed static contact bridge II, the normally open contact group further comprises a normally open static contact bridge I and a normally open static contact bridge II, the outgoing wires comprise an outgoing wire I, an outgoing wire II and an outgoing wire III, the normally closed static contact bridge I and the normally open static contact bridge I are integrated, the connection part of the normally closed static contact bridge I and the normally open static contact bridge I is welded with one end of the outgoing wire I, the other end of the outgoing wire I penetrates out of a switch shell, one end of the outgoing wire II is welded with the normally closed static contact bridge II, the other end of the outgoing wire II penetrates out of the switch shell, one end of the outgoing wire III is welded with the normally open static contact bridge II, and the other end of the outgoing wire III penetrates out of the switch shell, and the outgoing wires of the same switch group are the same in color.

5. The auxiliary switch of claim 4, wherein the switch housing comprises a base, a mounting cavity is formed in the base, a partition board I and a partition board II are arranged in the mounting cavity, the partition board I and the partition board II divide the mounting cavity into a lead cavity I, a contact cavity and a lead cavity II, one end of a lead I is located in the lead cavity I, the other end of the lead I penetrates out of the side wall of the switch housing, one end of the lead II and one end of the lead III are located in the lead cavity II, and the other ends of the lead II and the lead III penetrate out of the side wall of the switch housing.

6. The auxiliary switch of claim 5, wherein the normally-closed static contact bridge I and the normally-open static contact bridge I are formed into a U-shaped structure, the partition board I is arranged on the inner side of the U-shaped structure and is clung to the U-shaped structure, and the partition board II is arranged between the normally-closed static contact bridge II and the normally-open static contact bridge II.

7. The auxiliary switch of claim 1, wherein at least two switch groups are sequentially stacked, push rods of one switch group are main push rods, push rods of the other switch groups are auxiliary push rods, the main push rods are provided with first abutting surfaces, the auxiliary push rods are provided with second abutting surfaces, and the first abutting surfaces are in contact with the second abutting surfaces so as to drive the auxiliary push rods to slide together when the main push rods slide.

8. An auxiliary switch as set forth in claim 1 further comprising a return spring disposed between the push rod and the switch housing and/or a roller disposed on an end of the push rod exposed outside the housing.

9. The auxiliary switch of claim 1, wherein the switch housing comprises a base and a face cover, a mounting cavity is formed in the base, the normally closed contact set and the normally open contact set are arranged in the mounting cavity, the face cover and the base are fastened through bolts and nuts, and the face cover is used for sealing an opening of the mounting cavity.

10. A universal circuit breaker comprising an auxiliary switch as claimed in any one of claims 1 to 9.