Expansion accessory

Abstract

The utility model belongs to the technical field of contactors, and discloses an expansion accessory which is hung on a contactor so as to enable the contactor to expand additional functions, the expansion accessory comprises a main shell, a protective cover, an extension shell, a first expansion module and a second expansion module, the main shell is connected with the contactor, the extension shell is clamped between the protective cover and the main shell, and the first expansion module is connected with the second expansion module. The first expansion module and the second expansion module are arranged in the main shell and the extension shell respectively. The extension accessory is provided with the extension shell according to actual requirements so as to be compatible with more functions; and the protective cover, the extension shell and the main shell are connected in a clamping manner, so that the disassembly and assembly are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to an expansion accessory. Background Art

[0002] Contactors are widely used switching devices for frequent connection and disconnection, AC and DC main circuits and large-capacity control circuits. According to market demand, current contactor products have been extended to various contactors with diverse appearances and functions, such as wide voltage contactors, narrow voltage contactors, AC and DC universal contactors, etc. When users iteratively upgrade complete sets of electrical control cabinets, complete sets of distribution cabinets and other equipment, they often use new and multifunctional contactors to replace the original contactors, aiming to optimize performance, reduce costs and increase efficiency, and expand functions. After readjusting the equipment layout, the original contactors also need to be replaced, which is not conducive to the user's rapid iteration.

[0003] Therefore, an expansion accessory is needed to be hung on the original contactor so as to expand the original contactor with additional functions, reduce cost investment, and improve product compatibility. Utility Model Content

[0004] The purpose of the utility model is to provide an expansion accessory to expand the original contactor with additional functions, reduce cost investment, and improve product compatibility.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The expansion accessory comprises a main housing, a protective cover and a first expansion module, wherein the main housing is connected to the contactor, the first expansion module is arranged in the main housing, and the expansion accessory further comprises:

[0007] An extension shell, wherein the extension shell is disposed between the main shell and the protective cover, and two ends of the extension shell are respectively engaged with the protective cover and the main shell;

[0008] A second expansion module is disposed in the extension shell.

[0009] As an optional solution, two opposite sides of the main shell are provided with first fixing buckles, two opposite sides of the protective cover are provided with first extension plates, and the first extension plates are provided with first fixing holes;

[0010] The second extension plates are provided on opposite sides of one end of the extension shell, the second extension plates are provided with second fixing holes, the second fixing buckles are provided on opposite sides of the other end of the extension shell, the second fixing holes are connected with the first fixing buckles, and the first fixing holes are connected with the second fixing buckles.

[0011] As an optional solution, a plurality of extension shells are provided, and the plurality of extension shells are sequentially connected to each other, and the outermost extension shell is connected to the main shell, and the protective cover is connected to the outermost extension shell.

[0012] As an optional solution, a positioning bar is provided at one end of the main housing facing the contactor, a positioning groove is provided on the contactor, and the positioning bar is plugged into the positioning groove.

[0013] As an optional solution, the positioning strip includes a rectangular portion and a hook portion connected to each other, the positioning groove includes a main groove and a connecting groove connected to each other, the rectangular portion is plugged into the main groove, and the hook portion is confined in the connecting groove.

[0014] As an optional solution, the hook portion is arranged at an end of the rectangular portion away from the main shell, and a clamping protrusion is arranged on a side of the rectangular portion facing the hook portion, and the clamping protrusion abuts against the groove wall of the main groove.

[0015] As an optional solution, two of the positioning bars and two of the positioning grooves are provided, and the two positioning bars are respectively plugged into and matched with the two positioning grooves.

[0016] As an optional solution, the protective cover is provided with an opening, and the expansion attachment further comprises a covering plate, the covering plate is slidably connected to the protective cover, and the covering plate is used to slide to open or close the opening.

[0017] As an optional solution, the opening includes a plurality of rectangular openings arranged at intervals, the protective cover is provided with track grooves on both sides of each of the rectangular openings, the covering plate includes a plurality of covering sub-plates arranged at intervals, the plurality of covering sub-plates are arranged one-to-one corresponding to the plurality of rectangular openings, and the two sides of each of the covering sub-plates are respectively slidably inserted into the track grooves on both sides of the corresponding rectangular openings.

[0018] As an optional solution, a wire hole is provided on the main shell, and a wiring box is provided on the wire hole.

[0019] Beneficial effects of the utility model:

[0020] The utility model provides an expansion accessory, which is hung on the contactor to expand additional functions of the contactor. The expansion accessory includes a main shell, a protective cover, an extension shell, a first expansion module and a second expansion module. The extension shell is clamped between the protective cover and the main shell, and the first expansion module and the second expansion module are respectively arranged in a first accommodation space in the main shell and a second accommodation space in the extension shell. The expansion accessory solves the problem that the internal space of the contactor is insufficient and more functions cannot be built in, and the extension shell is arranged according to actual needs to change the size of the accommodation space to accommodate more functions; the protective cover, the extension shell and the main shell are connected to each other by clamping, so that it is easy to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the expansion attachment provided by the embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the main housing involved in the embodiment of the utility model;

[0023] Figure 3 It is a structural schematic diagram of a contactor involved in an embodiment of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the protective cover and the cover plate involved in the embodiment of the utility model.

[0025] In the figure:

[0026] 1. Main housing; 11. First fixing buckle; 12. Positioning strip; 121. Rectangular portion; 1211. Snap-on protrusion; 122. Hook portion; 13. Wiring box;

[0027] 2. Protective cover; 21. First extension plate; 211. First fixing hole; 22. Opening; 221. Rectangular opening; 23. Track groove;

[0028] 3. Extended housing; 31. Second extended plate; 311. Second fixing hole; 32. Second fixing buckle;

[0029] 4. The first expansion module;

[0030] 5. Covering plate; 51. Covering plate; 52. Handle bar;

[0031] 100, contactor; 101, positioning slot; 1011, main slot; 1012, snap-in slot. DETAILED DESCRIPTION

[0032] The embodiments of the present invention 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 components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection 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 the present invention can be understood according to specific circumstances.

[0034] In the description of the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0036] like Figure 1-Figure 4 As shown, the embodiment of the utility model provides an expansion accessory that can be hung on the contactor 100 so that the contactor 100 can expand the required additional functions to meet the needs of iterative upgrades. The expansion accessory includes a main shell 1, a protective cover 2, an extension shell 3, a first expansion module 4 and a second expansion module. The main shell 1 is connected to the contactor 100, and the extension shell 3 is clamped between the protective cover 2 and the main shell 1, that is, one end of the extension shell 3 is clamped with the main shell 1, and the protective cover 2 is clamped with the other end of the extension shell 3. The main shell 1 has a first accommodating space, and the extension shell 3 has a second accommodating space. The first expansion module 4 and the second expansion module are respectively arranged in the first accommodating space and the second accommodating space.

[0037] For example, the first expansion module 4 and the second expansion module can both be equipped with PCB electronic component boards, varistors or RC kits, etc., and can achieve the following functions: first, the contactor 100 works with a wide voltage, such as expanding the original 24V to 36V-60V (V is the voltage unit volt); second, the contactor 100 works with a narrow voltage, such as expanding the original 75% Us pull-in and 30% Us release to 75% Us pull-in and 70% Us release (Us is the coil control voltage); third, the contactor 100 works with surge protection, such as installing different types of varistors or RC kits to achieve surge protection of different voltages; fourth, the contactor 100 works with communication, such as installing a Bluetooth communication module to achieve real-time communication and monitoring.

[0038] This expansion accessory solves the problem that the internal space of the contactor 100 is insufficient to build in more functions, and an extension shell 3 is set according to actual needs to change the size of the accommodating space to accommodate more functions; the protective cover 2, the extension shell 3 and the main shell 1 are connected to each other through a snap-on connection, making disassembly and assembly more convenient.

[0039] Specifically, two side surfaces of the main shell 1 opposite to each other along the first direction (X axis) are provided with two first fixing buckles 11 spaced apart along the second direction (Z axis), and two side surfaces of the protective cover 2 opposite to each other along the first direction are provided with two first extension plates 21 spaced apart along the second direction, the first extension plates 21 and the first fixing buckles 11 are arranged one-to-one, and the first extension plates 21 are provided with first fixing buckle holes 211; two side surfaces of the extension shell 3 opposite to each other along the first direction are provided with two second extension plates 3 spaced apart along the second direction toward one end of the main shell 1 1, a second fixing card hole 311 is provided on the second extension plate 31, and two side surfaces of the extension shell 3 opposite to each other along the first direction are provided with second fixing buckles 32 arranged at intervals along the second direction at one end facing the protective cover 2. The second extension plates 31 are arranged one-to-one with the first fixing buckles 11, and the second fixing buckles 32 are arranged one-to-one with the first extension plates 21. The second fixing card hole 311 can be engaged with the first fixing buckle 11, and the first fixing card hole 211 can be engaged with the second fixing buckle 32, so that the extension shell 3 is engaged between the main shell 1 and the protective cover 2.

[0040] In this embodiment, the first fixing buckle 11 and the second fixing buckle 32 have the same structure, and the first fixing hole 211 and the second fixing hole 311 have the same structure.

[0041] When a third expansion module, a fourth expansion module or more are required, multiple extension shells 3 can be provided according to actual needs, and multiple extension shells 3 are sequentially connected to each other, and the outermost extension shell 3 is connected to the main shell 1, and the protective cover 2 is connected to the outermost extension shell 3. This structure provides multiple extension shells 3 according to actual needs to further solve the problem of insufficient accommodation space and realize more functions.

[0042] Optionally, refer to Figure 2-Figure 3 A positioning bar 12 is provided at one end of the main housing 1 facing the contactor 100, and the positioning bar 12 extends along the second direction. A positioning groove 101 extending along the second direction is provided on the contactor 100. The positioning bar 12 and the positioning groove 101 are plugged in and matched to realize the connection of the main housing 1 to the contactor 100, which is convenient for installation.

[0043] Specifically, the positioning strip 12 includes a rectangular portion 121 and a hook portion 122 that are interconnected, and the rectangular portion 121 and the hook portion 122 both extend along the second direction. The positioning groove 101 includes a main groove 1011 and a snap-fit ​​groove 1012 that are interconnected and extend along the second direction. When the positioning strip 12 is plugged into the positioning groove 101, the rectangular portion 121 is plugged into the main groove 1011, and the hook portion 122 is limited in the snap-fit ​​groove 1012, so that the main housing 1 and the contactor 100 are installed more firmly.

[0044] In this embodiment, two positioning bars 12 are arranged at intervals along the first direction, and two positioning grooves 101 are arranged along the first direction. The two positioning bars 12 and the two positioning grooves 101 are respectively plugged in and matched, and the hook portions 122 on the two positioning bars 12 are arranged back to back, making the plugging more secure.

[0045] In order to further improve the connection firmness between the main housing 1 and the contactor 100, a snap-in protrusion 1211 is provided on the side of the rectangular portion 121 facing the hook portion 122. When the positioning strip 12 is plugged into the positioning groove 101, the snap-in protrusion 1211 abuts against the groove wall of the main groove 1011 to increase the friction between the positioning strip 12 and the positioning groove 101, thereby effectively preventing the positioning strip 12 and the positioning groove 101 from sliding and disengaging.

[0046] Reference Figure 4 The protective cover 2 is provided with an opening 22, and the expansion attachment further includes a cover plate 5, which is slidably connected to the protective cover 2 so that the cover plate 5 can open or close the opening 22. When it is necessary to import a program into the first expansion module 4 and the second expansion module, or to dissipate heat from the first expansion module 4 and the second expansion module, the cover plate 5 can be slid to open the opening 22, and the operator can import the program through the opening 22, and the first expansion module 4 and the second expansion module can dissipate heat through the opening 22; when the environment is relatively harsh, the cover plate 5 can close the opening 22 to prevent dust and moisture.

[0047] Specifically, the opening 22 includes a plurality of rectangular openings 221 spaced apart along the first direction, and the protective cover 2 is provided with slide rails on both sides of each rectangular opening 221 along the first direction, and the slide rails are provided with track grooves 23, and the cover plate 5 includes a handle bar 52 and a plurality of cover split plates 51 spaced apart, and the plurality of cover split plates 51 are spaced apart along the first direction on the handle bar 52, and the plurality of cover split plates 51 and the plurality of rectangular openings 221 are provided one-to-one, and the operator can open or close the plurality of rectangular openings 221 simultaneously with the plurality of cover split plates 51 through the handle bar 52, and the two sides of each cover split plate 51 are respectively slidably inserted into the track grooves 23 on both sides of the corresponding rectangular opening 221. This structure can effectively reduce the weight of the cover plate 5 and prevent the cover plate 5 from being deformed.

[0048] Two input terminals are provided on the main shell 1, and the input terminals include a combination screw and a wiring piece. The wiring piece is used to connect the first expansion module 4 and the second expansion module. The power supply line is connected through the input window, and additional functions are realized through the first expansion module 4 and the second expansion module. The first expansion module 4 and the second expansion module are connected to the coil of the contactor 100 through the output wire, so as to control the operation of the coil of the contactor 100.

[0049] Optionally, refer to Figure 1 A wire hole is provided on the main shell 1, and a wiring box 13 is provided on the wire hole. The wiring box 13 is a M-shaped fan-blade wiring box 13. The output wire is passed through the wiring box 13, which can fix the output wire and prevent foreign matter such as dust or cotton from entering the interior of the main shell 1 through the wire hole.

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An expansion accessory, comprising a main housing (1), a protective cover (2) and a first expansion module (4), wherein the main housing (1) is connected to a contactor (100), and the first expansion module (4) is arranged in the main housing (1), characterized in that: The expansion attachments also include: An extension shell (3), the extension shell (3) being arranged between the main shell (1) and the protective cover (2), and two ends of the extension shell (3) being respectively clamped with the protective cover (2) and the main shell (1); A second expansion module, wherein the second expansion module is arranged in the extension shell (3).

2. The expansion accessory according to claim 1, characterized in that: Two opposite side surfaces of the main shell (1) are each provided with a first fixing buckle (11), and two opposite side surfaces of the protective cover (2) are each provided with a first extension plate (21), and the first extension plate (21) is provided with a first fixing buckle hole (211); Second extension plates (31) are provided on opposite sides of one end of the extension shell (3), and the second extension plate (31) is provided with a second fixing clip hole (311). Second fixing clips (32) are provided on opposite sides of the other end of the extension shell (3), and the second fixing clip hole (311) is snap-fitted with the first fixing clip (11), and the first fixing clip hole (211) is snap-fitted with the second fixing clip (32).

3. The expansion accessory according to claim 1, characterized in that: A plurality of the extension shells (3) are provided, and the plurality of the extension shells (3) are sequentially connected to each other, and the extension shell (3) located at the outermost side is connected to the main shell (1), and the protective cover (2) is connected to the other extension shell (3) located at the outermost side.

4. The expansion accessory according to claim 1, characterized in that: A positioning strip (12) is provided at one end of the main housing (1) facing the contactor (100), a positioning groove (101) is provided on the contactor (100), and the positioning strip (12) is plugged into the positioning groove (101).

5. The expansion accessory according to claim 4, characterized in that: The positioning strip (12) comprises a rectangular portion (121) and a hook portion (122) connected to each other, the positioning groove (101) comprises a main groove (1011) and a clamping groove (1012) connected to each other, the rectangular portion (121) is plugged into the main groove (1011), and the clamping hook portion (122) is confined in the clamping groove (1012).

6. The expansion accessory according to claim 5, characterized in that: The hook portion (122) is arranged at one end of the rectangular portion (121) away from the main shell (1), and a clamping protrusion (1211) is arranged on the side of the rectangular portion (121) facing the hook portion (122), and the clamping protrusion (1211) abuts against the groove wall of the main groove (1011).

7. The expansion accessory according to claim 4, characterized in that: Two of the positioning strips (12) and two of the positioning grooves (101) are provided, and the two positioning strips (12) are respectively plugged into and matched with the two positioning grooves (101).

8. The expansion accessory according to claim 1, characterized in that: The protective cover (2) is provided with an opening (22), and the expansion attachment further comprises a cover plate (5), the cover plate (5) is slidably connected to the protective cover (2), and the cover plate (5) is used to slide open or close the opening (22).

9. The expansion accessory according to claim 8, characterized in that: The opening (22) comprises a plurality of rectangular openings (221) arranged at intervals, the protective cover (2) is provided with track grooves (23) on both sides of each of the rectangular openings (221), the cover plate (5) comprises a plurality of cover sub-plates (51) arranged at intervals, the plurality of cover sub-plates (51) are arranged in one-to-one correspondence with the plurality of rectangular openings (221), and the two sides of each of the cover sub-plates (51) are respectively slidably inserted into the track grooves (23) on both sides of the corresponding rectangular opening (221).

10. The expansion accessory according to claim 1, characterized in that: The main housing (1) is provided with a wire hole, and a wiring box (13) is provided on the wire hole.

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