Auxiliary switch and universal circuit breaker

Abstract

The utility model discloses an auxiliary switch and a universal circuit breaker, and the auxiliary switch comprises at least one switch group, and each switch group comprises a switch housing, a push rod, and at least one contact assembly. The push rod and the switch shell are arranged in a sliding mode, one end of the push rod penetrates into the switch shell, and the other end of the push rod is exposed out of the shell. The contact assembly comprises a normally-closed contact set and a normally-open contact set, a normally-closed movable contact bridge of the normally-closed contact set and a normally-open movable contact bridge of the normally-open contact set are both arranged on the push rod and move along with the push rod, and state conversion of the normally-closed contact set and the normally-open contact set is achieved through sliding of the push rod; all contact surfaces in the normally closed contact group and the normally open contact group are knurled surfaces; the composite material has the advantage of being good in electro-corrosion resistance.

Description

Technical Field

[0001] The present application relates to the electrical field, and in particular to an auxiliary switch, and in particular to an auxiliary switch of a circuit breaker. Background Art

[0002] In the field of circuit breakers, in order to achieve signal feedback, travel switches are often used as auxiliary switches.

[0003] A contactor with a conversion auxiliary pole disclosed in CN115798992A is a common auxiliary switch. However, the contact surfaces of the contacts of the existing switches are all flat, and such flat surfaces are easily attached with oil, dirt, etc., so the contact performance of the contacts may be affected when the contacts are in use, thereby reducing the anti-electrical corrosion performance of the contacts.

[0004] Therefore, how to design an auxiliary switch with relatively high anti-electrocorrosion performance is a direction worthy of research. Summary of the invention

[0005] In view of this, the purpose of the present application is to overcome the deficiencies in the prior art and to provide an auxiliary switch and a universal circuit breaker.

[0006] The present application provides: an auxiliary switch, which includes at least one switch group, each switch group includes a switch housing, a push rod and at least one group of contact components; the push rod and the switch housing are slidably arranged, one end of the push rod penetrates into the switch housing, and the other end of the push rod is exposed outside the housing; the contact component includes a normally closed contact group and a normally open contact group, the normally closed moving contact bridge of the normally closed contact group and the normally open moving contact bridge of the normally open contact group are both arranged on the push rod and move with the push rod, and the sliding of the push rod realizes the state transition of the normally closed contact group and the normally open contact group; each contact surface in the normally closed contact group and the normally open contact group is a knurled surface.

[0007] With this structure, since each contact surface is a knurled surface, and the knurled surface has concave and convex parts, even if there is some oil or dirt on the contact surface, it will fall into the concave part of the knurled surface. When two corresponding contact surfaces gradually approach each other, the convex part of the knurled surface will conduct electricity first. Under the action of this arc, even if there is some oil or dirt in the concave part, it will be blown away by the arc. Therefore, this structure improves the electrical corrosion resistance.

[0008] In some embodiments of the present application, the knurling pattern of the knurled surface is straight or oblique.

[0009] There are many common knurling patterns, and straight or twill patterns have good electrical conductivity and anti-corrosion properties.

[0010] In some embodiments of the present application, there are at least two switch groups, and the switch groups are stacked in sequence; each switch group is provided with lead wires connected to an internal normally closed contact group and a normally open contact group, and the lead wires of two adjacent switch groups have different colors.

[0011] With this structure, the auxiliary switches are often arranged in multiple groups side by side, and the lead wires between each two adjacent switch groups are of different colors, which can greatly facilitate the user to connect the wires and avoid the user from making mistakes.

[0012] In some embodiments of the present application, the normally closed contact group also includes a normally closed static contact bridge I and a normally closed static contact bridge II, and the normally open contact group also includes a normally open static contact bridge I and a normally open static contact bridge II; the lead-out wire includes 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 an integrated part, and the connection between the normally closed static contact bridge I and the normally open static contact bridge I is welded to one end of the lead-out wire I, and the other end of the lead-out wire I passes through the switch housing; one end of the lead-out wire II is welded to the normally closed static contact bridge II, and the other end passes through the switch housing; one end of the lead-out wire III is welded to the normally open static contact bridge II, and the other end passes through the switch housing; the lead-out wires of the same switch group have the same color.

[0013] This structural arrangement facilitates the connection between each lead wire and the corresponding static contact bridge.

[0014] In some embodiments of the present application, the switch housing includes a base, an installation cavity is provided on the base, partition I and partition II are provided in the installation cavity, partition I and partition II divide the installation cavity into a lead cavity I, a contact cavity and a lead cavity II; one end of the lead wire I is located in the lead cavity I, and the other end passes through the side wall of the switch housing; one end of the lead wire II and the lead wire III are located in the lead cavity II, and the other end of the lead wire II and the lead wire III passes through the side wall of the switch housing.

[0015] By adopting this structural setting, the welding part of the lead wire can be separated from the contact part of each static contact bridge, so as to avoid the influence of the welding of the lead wire on the contact part.

[0016] In some embodiments of the present application, the normally closed static contact bridge I and the normally open static contact bridge I form a U-shaped structure, and the partition I is arranged on the inner side of the U-shaped structure and close to it; the partition II is arranged between the normally closed static contact bridge II and the normally open static contact bridge II.

[0017] By adopting this structural design, each static contact bridge can be arranged more compactly and the internal structure can be more reasonable.

[0018] In some embodiments of the present application, there are at least two switch groups, and the switch groups are stacked in sequence; the push rod of one switch group is a main push rod, and the push rods of the other switch groups are slave push rods. The main push rod is provided with a first abutment surface, and the slave push rod is provided with a second abutment surface. The first abutment surface contacts the second abutment surface, so that when the main push rod slides, the slave push rod is driven to slide together.

[0019] By adopting this structure, a transmission relationship between multiple switch groups can be effectively achieved.

[0020] In some embodiments of the present application, a return spring is further provided between the push rod and the switch housing; and / or a roller is provided on one end of the push rod exposed outside the housing.

[0021] The design of the return spring will be beneficial to the resetting of the push rod, and the design of the roller will reduce the impact force on the push rod.

[0022] In some embodiments of the present application, the switch housing includes a base and a cover, the base is provided with an installation cavity, and the normally closed contact group and the normally open contact group are arranged in the installation cavity; the cover and the base are fastened by bolts and nuts, and the cover is used to close the opening of the installation cavity.

[0023] By using the combination of bolts and nuts, the switch housing can be easily disassembled, and the user can more conveniently inspect the contact components inside the auxiliary switch.

[0024] A universal circuit breaker, comprising the above-mentioned auxiliary switch.

[0025] The auxiliary switch of the universal circuit breaker adopting this structure will have better anti-electrical corrosion performance, thereby improving the stability of the universal circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A three-dimensional diagram of an auxiliary switch according to an embodiment of the present application is shown;

[0028] Figure 2 A front view of an auxiliary switch according to an embodiment of the present application is shown;

[0029] Figure 3 A structural diagram of a base in an auxiliary switch in an embodiment of the present application is shown;

[0030] Figure 4 A schematic diagram of the structure of one group of contact components in an auxiliary switch of an embodiment of the present application is shown;

[0031] Figure 5 A schematic diagram showing a contact surface in an auxiliary switch according to an embodiment of the present application is shown;

[0032] Figure 6 A diagram showing the relationship between a main push rod and a slave push rod in an auxiliary switch according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "electrically connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed electrical connection, a detachable electrical connection, or an integrated one; it can be a mechanical electrical connection, or an electrical electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature. Example

[0038] like Figure 1-Figure 6 As shown, the embodiment of the present application is an auxiliary switch, which includes multiple switch groups. In this embodiment, the auxiliary switch includes two switch groups, each of which includes a switch housing, a push rod 200 and at least one contact assembly. Regardless of which switch group, the internal structure is basically the same, and the only difference is that there is a slight difference in the structure of the push rod 200. In order to distinguish the two switch groups, they are respectively called the first switch group S1 and the second switch group S2.

[0039] Taking the first switch group S1 as an example,

[0040] The first switch group S1 includes a switch housing, a push rod 200 and two groups of contact components.

[0041] The switch housing includes a base 100 and a cover 101 , wherein the base 100 and the cover 101 are fastened by bolts 102 passing through nuts 103 , and the cover 101 is transparent.

[0042] Two mounting cavities 104 are arranged on the base 100, and the two mounting cavities 104 are arranged at the upper and lower parts, and a group of contact components are arranged in each mounting cavity 104. A push rod 200 is slidably arranged on the base 100, and one end is exposed outside the base 100. Each moving contact bridge in the contact component is fixed on the push rod 200, and the state in the contact component can be changed by pushing the push rod 200.

[0043] Taking the contact assembly in one of the installation cavities 104 as an example, the contact assembly includes a normally closed contact group 301 and a normally open contact group 302. Here, the normally closed contact group 301 includes a normally closed moving contact bridge 301a, a normally closed static contact bridge I 301b, and a normally closed static contact bridge II 301c, and the normally open contact group 302 includes a normally open moving contact bridge 302a, a normally open static contact bridge I 302b, and a normally open static contact bridge II 302c. The normally closed moving contact bridge 301a and the normally open moving contact bridge 302a are fixed on the push rod 200. With the movement of the push rod 200, the states of the normally closed contact group 301 and the normally open contact group 302 change. For example, the contact group that was originally normally closed is now separated, and the contact group that was originally normally open is now in contact.

[0044] Here, there is a contact surface J100 between the normally open moving contact bridge 302a and the normally open static contact bridge I 302b, there is a contact surface J100 between the normally open moving contact bridge 302a and the normally open static contact bridge II 302c, there is a contact surface J100 between the normally closed moving contact bridge 301a and the normally closed static contact bridge I 301b, and there is also a contact surface J100 between the normally closed moving contact bridge 301a and the normally closed static contact bridge II 301c. All the contact surfaces J100 here are knurled surfaces. Knurled surface means that it is not a flat surface, but there are convex parts J1001 and concave parts J1002 on it. There are many knurling patterns of knurled surface. In this embodiment, it is straight, of course, it can also be twill.

[0045] The mounting cavity 104 also has a partition I 105 and a partition II 106, which are integrated with the base 100. The mounting cavity 104 can be roughly divided into a lead cavity I 104a, a contact cavity 104b and a lead cavity II 104c by the partition I 105 and the partition II 106.

[0046] Here, the normally closed static contact bridge I 301b and the normally open static contact bridge I 302b are integrated, and the two form a U-shaped structure, and the partition I 105 is located inside the U-shaped structure and is closely attached to the U-shaped structure. The normally open static contact bridge II 302c and the normally closed static contact bridge II 301c are respectively I-shaped structures, and the two are spaced apart, and the partition II 106 is located between the normally open static contact bridge II 302c and the normally closed static contact bridge II 301c.

[0047] One end of the lead wire Ⅰ400a is located in the lead wire cavity Ⅰ104a, and the other end of the lead wire Ⅰ400a passes through the side wall of the switch housing. The end of the lead wire Ⅰ400a located in the lead wire cavity Ⅰ104a is welded and fixed to the connection between the normally closed static contact bridge Ⅰ301b and the normally open static contact bridge Ⅰ302b.

[0048] One end of the lead wire III400c and the lead wire II400b is located in the lead wire cavity II104c, and the other end passes through the side wall of the switch housing. The end of the lead wire II400b located in the lead wire cavity II104c is welded to the normally closed static contact bridge II301c, and the end of the lead wire III400c located in the lead wire cavity II104c is welded to the normally open static contact bridge II302c.

[0049] Here, in the same switch group, the colors of lead wires I 400a, III 400c, and II 400b are the same. However, for adjacent switch groups, the colors of their lead wires are different. For example, Figure 1 As shown, the lead wires I400a, III400c and II400b in the first switch group S1 have a first color C1, and the lead wires I400a, III400c and II400b in the second switch group S2 have a second color C2.

[0050] In order to reset the push rod 200 after being pushed, a reset spring 500 is provided between the base 100 and the push rod 200. Here, the reset spring 500 is a compression spring.

[0051] Since the biggest difference between the second switch group S2 and the first switch group S1 is the different colors of the push rod 200 and the lead wire, the push rod 200 of the first switch group S1 is hereinafter referred to as the main push rod 200a, and the push rod 200 of the second switch group S2 is referred to as the slave push rod 200b. Here, the main push rod 200a is provided with a first abutting surface 200a1, and the slave push rod 200b is provided with a second abutting surface 200b1, and the first abutting surface 200a1 is in abutment with the second abutting surface 200b1, so that when the main push rod 200a is pushed, the slave push rod 200b can be driven to slide together.

[0052] Here, a roller 600 is also provided on the main push rod 200a.

[0053] The above-mentioned auxiliary switch is mainly used in universal circuit breakers as an auxiliary component.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradiction.

[0055] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An auxiliary switch, characterized in that: It comprises at least one switch group, each switch group comprises a switch housing, a push rod and at least one group of contact components; the push rod and the switch housing are slidably arranged, one end of the push rod penetrates into the switch housing, and the other end of the push rod is exposed outside the housing; the contact components comprise a normally closed contact group and a normally open contact group, the normally closed moving contact bridge of the normally closed contact group and the normally open moving contact bridge of the normally open contact group are both arranged on the push rod and move with the push rod, and the sliding of the push rod realizes the state change of the normally closed contact group and the normally open contact group; each contact surface in the normally closed contact group and the normally open contact group is a knurled surface.

2. An auxiliary switch according to claim 1, characterized in that: The knurling pattern of the knurled surface is straight or oblique.

3. An auxiliary switch according to claim 1, characterized in that: There are at least two switch groups, which are stacked in sequence; each switch group is provided with lead wires connected to an internal normally closed contact group and a normally open contact group, and the lead wires of two adjacent switch groups have different colors.

4. An auxiliary switch according to claim 2, characterized in that: The normally closed contact group also includes a normally closed static contact bridge I and a normally closed static contact bridge II, and the normally open contact group also includes a normally open static contact bridge I and a normally open static contact bridge II; the lead wire includes a lead wire I, a lead wire II and a lead wire III; the normally closed static contact bridge I and the normally open static contact bridge I are an integrated part, the connection between the normally closed static contact bridge I and the normally open static contact bridge I is welded to one end of the lead wire I, and the other end of the lead wire I passes through the switch housing; One end of the lead wire II is welded to the normally closed static contact bridge II, and the other end passes through the switch housing; one end of the lead wire III is welded to the normally open static contact bridge II, and the other end passes through the switch housing; the lead wires of the same switch group have the same color.

5. An auxiliary switch according to claim 4, characterized in that: The switch housing comprises a base, a mounting cavity is formed on the base, a partition I and a partition II are provided in the mounting cavity, and the partition I and the partition II divide the mounting cavity into a lead cavity I, a contact cavity and a lead cavity II; one end of the lead wire I is located in the lead cavity I, and the other end passes through the side wall of the switch housing; One end of the lead wire II and the lead wire III is located in the lead wire cavity II, and the other end of the lead wire II and the lead wire III passes through the side wall of the switch housing.

6. An auxiliary switch according to claim 5, characterized in that: The normally closed static contact bridge I and the normally open static contact bridge I form a U-shaped structure, and the partition I is arranged on the inner side of the U-shaped structure and is in close contact with it; Partition II is arranged between the normally closed static contact bridge II and the normally open static contact bridge II.

7. An auxiliary switch according to claim 1, characterized in that: There are at least two switch groups, and each switch group is stacked in sequence; the push rod of one switch group is a main push rod, and the push rods of the other switch groups are slave push rods. The main push rod is provided with a first abutment surface, and the slave push rod is provided with a second abutment surface. The first abutment surface contacts the second abutment surface, so that when the main push rod slides, the slave push rod is driven to slide together.

8. An auxiliary switch according to claim 1, characterized in that: It also includes a return spring arranged between the push rod and the switch housing; and / or a roller is arranged on one end of the push rod exposed outside the housing.

9. An auxiliary switch according to claim 1, characterized in that: The switch housing comprises a base and a cover, wherein the base is provided with an installation cavity, wherein the normally closed contact group and the normally open contact group are arranged in the installation cavity; the cover and the base are fastened by bolts and nuts, and the cover is used to close the opening of the installation cavity.

10. A universal circuit breaker, characterized in that: It comprises an auxiliary switch as described in any one of claims 1 to 9.

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