A type of plug-in auxiliary switch

Abstract

This utility model relates to a plug-in auxiliary switch, including a housing and several sets of contact assemblies and an operating lever installed inside the housing. Each set of contact assemblies includes one moving contact and two stationary contacts. The moving contact is driven by the operating lever and moves between the two stationary contacts to achieve connection / disconnection. The stationary contacts include a wiring portion located outside the housing. The wiring portion is a plug-in wiring plate, and its plane is perpendicular to the central axis L of the operating lever. This utility model optimizes the setting direction of the wiring portion so that the wiring direction of the plug-in auxiliary switch is perpendicular to the central axis L of the operating lever, which facilitates wiring after the plug-in auxiliary switch is installed on the main switch.

Description

Technical Field

[0001] This utility model relates to a plug-in auxiliary switch. Background Technology

[0002] An auxiliary switch is part of the main switch and is configured in high-voltage or medium-voltage circuit breakers, disconnectors, and other power equipment to perform secondary control circuit functions such as opening, closing, signal control, and interlocking protection. It can also be used as a combination switch or transfer switch. The name "auxiliary" refers to the fact that it is not an independent switch; it serves as a carrier for auxiliary disconnection, connection, and interlocking functions within the control system. Typically, an auxiliary switch includes a housing and contact assemblies and an operating lever installed within the housing. The contact assembly includes stationary and moving contacts. The stationary contacts are fixed to the housing and have exposed wiring structures on the housing surface. The moving contacts are driven by the operating lever and rotate relative to the housing, thereby switching the switch signal. Currently, the common wiring structure on auxiliary switches is bolt-fastened, which is relatively cumbersome in assembly and wiring processes, affecting the overall production efficiency and cost of the main switch. To address the aforementioned issues, the applicant's prior patent CN202222875944.6 proposes an auxiliary switch, comprising a base, a stationary contact piece disposed on the base, a movable contact piece for contacting the stationary contact piece, and a push rod for driving the movable contact piece to move closer to or away from the stationary contact piece. The movable contact piece is disposed on the push rod, which is movably disposed on the base. The stationary contact piece has a slot for inserting a wire, and the side wall of the slot has a groove for engaging with a protrusion on the wire. The applicant further discovered that when the auxiliary switch with the above structure is installed on the main switch, its wiring direction is parallel to the axial direction of the push rod, which affects wiring efficiency. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a direct-insertion auxiliary switch.

[0004] The technical solution adopted by this utility model is as follows: A plug-in auxiliary switch includes a housing and several sets of contact assemblies and an operating lever installed inside the housing. Each set of contact assemblies includes one moving contact and two stationary contacts. The moving contact is driven by the operating lever and moves between the two stationary contacts to achieve connection / disconnection. The stationary contact includes a wiring part located outside the housing. The wiring part is a plug-in wiring plate, and its plane is perpendicular to the axis L of the central axis of the operating lever.

[0005] An insulating partition is formed by a protrusion on one side of the outer surface of the housing where the wiring part is located. A wiring groove is formed between the insulating partitions. The number of wiring grooves is the same as the number of stationary contacts and they correspond one-to-one, so that the wiring part of each stationary contact is located in a wiring groove. The height of the protrusion of the wiring part relative to the outer surface of the housing is less than the height of the insulating partition.

[0006] A stationary contact has at least two wiring sections.

[0007] The stationary contact is formed by bending a conductive sheet. The two ends of the conductive sheet form two wiring portions, and the middle part is located inside the housing and forms the contact portion with the moving contact.

[0008] The conductive sheet is bent in the middle to form a contact portion, and the contact portion is arranged perpendicular to the axial direction of the operating lever. The two ends of the upper end of the contact portion are connected to the wiring portion through transition portions.

[0009] The two transition sections of the stationary contact have different widths along the axis L of the operating lever, resulting in different axial positions of the two wiring sections relative to the operating lever.

[0010] The housing includes a top cover and a base, which together form a cavity for accommodating a contact assembly and an operating lever. The top cover has a through hole adapted to the contact portion for it to pass through.

[0011] The two terminals of the stationary contact are at different radial distances relative to the operating rod.

[0012] The housing includes an upper cover and a base, with at least two upper covers connected to one of the bases and forming at least two cavities, each cavity containing an operating lever and a set of contact assemblies.

[0013] The base is provided with at least two lower receiving cavities, and connecting screw holes are provided outside the lower receiving cavities. The number of upper covers is the same as the number of lower receiving cavities and they are connected and fastened to the connecting screw holes by threaded fasteners.

[0014] The beneficial effects of this utility model are as follows: By optimizing the setting direction of the wiring part, this utility model makes the wiring direction of the plug-in auxiliary switch perpendicular to the axis of the central axis L of the operating lever, which facilitates the wiring of the plug-in auxiliary switch after it is installed on the main switch. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0017] Figure 2 This is an exploded view of one embodiment of the present invention;

[0018] Figure 3 for Figure 1 Enlarged diagram of part A in the middle;

[0019] Figure 4 This is a schematic diagram of the structure of the stationary contact in one embodiment of the present invention;

[0020] Figure 5 This is a partially enlarged top view of one embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the base structure in one embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the structure of the upper cover in one embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the structure of the present invention installed in the main switch according to one embodiment;

[0024] In the diagram, the operating lever is 100, the stationary contact is 200, the wiring part is 210, the contact part is 220, the transition part is 230, the upper cover is 300, the insulating partition is 310, the through hole is 320, the base is 400, and the lower receiving cavity is 410. Detailed Implementation

[0025] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0026] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0027] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0028] like Figure 1-3As shown, a plug-in auxiliary switch includes a housing and several sets of contact assemblies and an operating lever 100 installed inside the housing. The housing includes a top cover 300 and a base 400, which together form a cavity to accommodate the contact assemblies and the operating lever 100. Each set of contact assemblies includes one moving contact (hidden in the figure) and two stationary contacts 200. The moving contact inside the housing of the operating lever 100 is driven, and one end of the lever extends out of the housing to form a driving end. By driving the operating lever 100, the moving contact is actuated, thereby connecting / disconnecting the two stationary contacts 200. The stationary contacts 200 include a wiring portion 210 located outside the housing. The wiring portion 210 is a plug-in terminal block, such as... Figure 1 , Figure 3 As shown, the plane containing the wiring section 210 is perpendicular to the axis of the central axis L of the operating lever 100, thus making the wiring direction of the wiring section 210 perpendicular to the axis of the central axis L of the operating lever 100. Figure 1 As shown, this setup makes wiring more convenient, and, as Figure 8 As shown, installing the auxiliary switch onto the main switch makes wiring easier and facilitates maintenance.

[0029] like Figure 1 As shown, an insulating partition 310 is formed by a protrusion on the outer surface of one side of the housing where the wiring portion 210 is located. Wiring grooves are formed between the insulating partitions 310. The number of wiring grooves is the same as the number of stationary contacts 200, and they correspond one-to-one, so that the wiring portion 210 of each stationary contact 200 is located in one wiring groove. The height of the protrusion of the wiring portion 210 relative to the outer surface of the housing is less than the height of the insulating partition 310. The insulating partition 310 increases the creepage distance and improves safety.

[0030] Furthermore, such as Figure 4 As shown, a stationary contact 200 has at least two wiring portions 210, and all wiring portions 210 on a stationary contact 200 are arranged in a wiring slot. This allows for an increase in the number of wiring connections within a limited space, thereby increasing the number of switches that can be synchronously controlled. Specifically, as... Figure 4 As shown, the stationary contact 200 is formed by bending a conductive sheet. The two ends of the conductive sheet form two wiring portions 210, and the middle part located inside the housing forms a contact portion 220 with the moving contact.

[0031] The conductive sheet is bent in the middle to form a contact portion 220, which is perpendicular to the axial direction of the operating lever 100. The two ends of the upper end of the contact portion 220 are connected to the wiring portion 210 through the transition portion 230. The upper cover 300 is provided with a through hole 320 that is adapted to the contact portion 220 for it to pass through, which facilitates assembly.

[0032] like Figure 5As shown, the different widths of the two transition portions 230 of the stationary contact 200 along the central axis L of the operating lever 100 result in different axial positions of the two wiring portions 210 relative to the operating lever 100. The radial distances between the two wiring portions 210 of the stationary contact 200 and the operating lever 100 are also different. Increasing the wiring space of each wiring portion 210 facilitates operation.

[0033] Furthermore, the auxiliary switch in this embodiment is modular. Specifically, at least two upper covers 300 are connected to one of the bases 400, forming at least two cavities. Each cavity contains an operating lever 100 and a set of contact assemblies. The base 400 has at least two lower receiving cavities 410, and connecting screw holes are provided outside the lower receiving cavities 410. The number of upper covers 300 is the same as the number of lower receiving cavities 410, and they are fastened to the connecting screw holes by threaded fasteners.

[0034] The modular design of the auxiliary switch in this embodiment allows at least two sets of switch units to form a switch. During assembly, a top cover 300 can be fixed to the base 400 by two diagonally opposite bolts, and the stationary contact 200 is plugged in and fixed without bolts. The overall structure has fewer assembly steps and is more efficient.

[0035] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A plug-in auxiliary switch, comprising a housing and several sets of contact assemblies and an operating lever (100) installed within the housing, each set of contact assemblies comprising a moving contact and two stationary contacts (200), the moving contact being driven by the operating lever (100) to move between the two stationary contacts (200) to achieve connection / disconnection, the stationary contacts (200) comprising a wiring portion (210) located outside the housing, characterized in that: The wiring section (210) is a plug-in type wiring board, and its plane is perpendicular to the axis of the central axis L of the operating lever (100).

2. The through-hole auxiliary switch according to claim 1, characterized in that: An insulating partition (310) is formed by protruding on one side of the outer surface of the housing where the wiring part (210) is located. A wiring groove is formed between the insulating partitions (310). The number of wiring grooves is the same as the number of stationary contacts (200) and they correspond one-to-one, so that the wiring part (210) of each stationary contact (200) is located in a wiring groove. The height of the protrusion of the wiring part (210) relative to the outer surface of the housing is less than the height of the insulating partition (310).

3. The through-hole auxiliary switch according to claim 1, characterized in that: A stationary contact (200) has at least two wiring portions (210).

4. The through-hole auxiliary switch according to claim 3, characterized in that: The stationary contact (200) is formed by bending a conductive sheet. The two ends of the conductive sheet form two wiring portions (210), and the middle part is located inside the housing and forms a contact portion (220) with the moving contact.

5. The through-hole auxiliary switch according to claim 4, characterized in that: The conductive sheet is bent in the middle to form a contact part (220), and the contact part (220) is arranged perpendicular to the axial direction of the operating lever (100). The two ends of the upper end of the contact part (220) are connected to the wiring part (210) through the transition part (230).

6. The through-hole auxiliary switch according to claim 5, characterized in that: The two transition portions (230) of the stationary contact (200) have different widths along the central axis L of the operating lever (100), which causes the two wiring portions (210) to have different axial positions relative to the operating lever (100).

7. The through-hole auxiliary switch according to claim 5, characterized in that: The housing includes a top cover (300) and a base (400), which together form a cavity for accommodating a contact assembly and an operating lever (100). The top cover (300) has a through hole (320) adapted to the contact portion (220) for it to pass through.

8. The through-hole auxiliary switch according to claim 4 or 6, characterized in that: The two terminals (210) of the stationary contact (200) are at different radial distances relative to the operating lever (100).

9. The through-hole auxiliary switch according to any one of claims 1-7, characterized in that: The housing includes an upper cover (300) and a base (400), with at least two upper covers (300) connected to one of the bases (400) and forming at least two cavities, each cavity containing an operating lever (100) and a set of contact assemblies.

10. The through-hole auxiliary switch according to claim 9, characterized in that: The base (400) is provided with at least two lower receiving cavities (410), and a connecting screw hole is provided outside the lower receiving cavity (410). The number of upper covers (300) is the same as the number of lower receiving cavities (410) and they are connected and fastened to the connecting screw hole by threaded fasteners.

Images