Isolating switch contact

By introducing contact support and fixed shaft design into the isolating switch contact, the problems of loose structure of the dynamic contact and high internal resistance are solved, and higher current carrying capacity and temperature rise performance are achieved.

CN223167393UActive Publication Date: 2025-07-29CHINT LOW VOLTAGE ELECTRICAL TECH CO LTD
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Patent Information

Application Number
CN202422288218.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-19
Publication Date
2025-07-29
Estimated Expiration
2034-09-19

AI Technical Summary

Technical Problem

The contact internal resistance of existing isolating switch contacts is high, resulting in a reduced current carrying capacity and temperature rise performance, and the dynamic contact structure is loose and easy to shake.

Method used

The contact support structure is adopted, including a through groove and a fixed shaft, and combined with the elastic member, an integral connection between the first contact and the second contact is formed to enhance structural strength.

Benefits of technology

The structural strength of the isolating switch contacts is improved, and the moving contacts are avoided to shake, enhancing the current carrying capacity and temperature rise performance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides an isolating switch contact which comprises a moving contact, the moving contact comprises a first contact and a second contact which are oppositely arranged, two ends of the first contact and two ends of the second contact are provided with clamping gaps used for clamping a static contact, and the moving contact further comprises a contact support, at least one fixing shaft and at least one elastic piece. Two grooves are formed in the two opposite faces of the contact support, the two grooves are of a through structure in the length direction of the moving contact, the middle of the first contact and the middle of the second contact are arranged in the two grooves respectively, and at least one elastic piece is arranged on the opposite faces of the first contact and / or the second contact. The at least one fixing shaft penetrates through the middle parts of the first contact, the second contact, the contact support and the elastic piece, the first contact, the second contact, the contact support and the elastic piece are fixed into a whole, the contact support is arranged between the first contact and the second contact, and the structural strength is higher.
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Description

Technical Field

[0001] The utility model relates to the technical field of electricity, and particularly relates to a disconnector contact Background Art

[0002] The disconnector has the functions of isolating the power supply and disconnecting the circuit. With the rapid development of the photovoltaic field, the disconnector has also been widely used. In recent years, higher and higher requirements have been put forward for the current-carrying capacity and temperature rise performance of the disconnector.

[0003] The disconnector includes a switch contact, and the switch contact includes a moving contact and a static contact. The disconnection and closing of the moving contact and the static contact are used to realize the disconnection and connection of the circuit. In the prior art, the contact internal resistance between the moving contact and the static contact is too high, which increases the internal resistance of the switch, resulting in the reduction of the current-carrying capacity and temperature rise performance of the disconnector. One way to reduce the contact internal resistance is to increase the conductor cross-sectional area, and the other is to increase the clamping force between the moving contact and the static contact to ensure reliable contact between the moving contact and the static contact.

[0004] In the prior art, an elastic sheet is usually used to act on the moving contact to increase the clamping force between the moving contact and the static contact, and then the elastic sheet is locked by a locking member. The structure of the moving contact made in this way is relatively loose, and the two contacts of the moving contact are easy to shake. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the defects of the prior art and provide a disconnector contact with higher structural strength.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The present application provides a disconnector contact, including a moving contact. The moving contact includes a first contact and a second contact arranged oppositely. Clamping gaps for clamping a static contact are formed at both ends of the first contact and the second contact.

[0008] The moving contact further includes a contact support, at least one fixed shaft and at least one elastic member. Two grooves are formed on two opposite surfaces of the contact support. The two grooves are through structures along the length direction of the moving contact. The middle parts of the first contact and the second contact are respectively placed in the two grooves. At least one elastic member is arranged on the opposite surface of the first contact and / or the second contact. At least one of the fixed shafts penetrates through the middle parts of the first contact, the second contact, the contact support and the elastic member to fix the first contact, the second contact, the contact support and the elastic member into a whole.

[0009] In a possible implementation manner, the contact support includes two side portions and a support portion. The support portion is located in the middle of the two side portions, and the two side portions are respectively perpendicular to the support portion. The support portion is located between the first contact and the second contact.

[0010] In a possible implementation manner, the first contact and the second contact are in a flat plate structure. Two sides of the support portion are respectively attached to the first contact and the second contact. The support portion of the contact support forms the clamping gap at both ends of the first contact and the second contact.

[0011] In a possible implementation manner, a plurality of limiting bosses with the same height are arranged on two sides of the support portion of the contact support.

[0012] In a possible implementation manner, the moving contact includes two elastic members, and the two elastic members are respectively placed on two opposite sides of the first contact and the second contact; or the moving contact includes one elastic member, and the one elastic member is placed on one side of the opposite side of the first contact or the second contact.

[0013] In a possible implementation manner, the elastic member is in a long plate structure. First mounting portions are arranged at two ends of the elastic member, and second mounting portions for cooperating with and limiting the first mounting portions are arranged on the first contact and / or the second contact.

[0014] In a possible implementation manner, the first mounting portion is a convex portion at two ends of the elastic member, and the convex portion is a boss or a chamfer formed by bending two ends of the elastic member. The second mounting portion is a groove structure or a hole structure on the first contact and / or the second contact.

[0015] In a possible implementation manner, the moving contact includes a fixed shaft. A first limiting portion is arranged at one end of the fixed shaft, and a second limiting portion is arranged at the other end.

[0016] In a possible implementation manner, the first limiting portion is a disc with a diameter larger than the diameter of the fixed shaft, and the second limiting portion is a cylinder with a diameter smaller than the diameter of the fixed shaft. A first mounting hole or a mounting groove for cooperating with and fixing the second limiting portion is arranged on the first contact or the second contact; or, the first limiting portion and / or the second limiting portion are second mounting holes penetrating one end and second mounting shafts cooperating with the second mounting holes. The second mounting shafts are installed in the second mounting holes, and the length of the second mounting shafts is greater than the length of the second mounting holes. The penetrating direction of the second mounting holes is perpendicular to the mounting direction of the fixed shaft.

[0017] In one possible implementation, the side protrusions at both ends of the first contact and the second contact are provided with arc-shaped protrusions, and the arc-shaped protrusions of the first contact and the arc-shaped protrusions of the second contact are arranged opposite to each other and the distance between them is greater than the distance of the clamping gap between the first contact and the second contact.

[0018] Compared with the prior art, the present application adds a contact support in the middle of the first contact and the second contact, and the contact support includes two grooves that pass through along the length direction of the moving contact. The middle parts of the first contact and the second contact are respectively placed in the two grooves, and then at least one elastic member is provided on the back sides of the first contact and the second contact to provide a clamping force for the moving contact and a clamping force for clamping the static contact for the clamping gap at both ends of the moving contact. The first contact, the second contact, the contact support and the elastic member are fixedly connected as a whole by a fixed shaft passing through the first contact, the second contact, the contact support and the elastic member. The present application enhances the structural strength of the moving contact by providing the contact support, and avoids the first contact and the second contact from being loosely fixed and shaking relative to each other during use.

[0019] Furthermore, the contact support is designed into an "I"-shaped structure, which can better wrap and protect the first contact and the second contact, so that the first contact and the second contact are structurally wrapped into a whole.

[0020] Furthermore, by providing arc-shaped protrusions on the side protrusions at both ends of the first contact and the second contact, the arc-shaped protrusions of the first contact and the arc-shaped protrusions of the second contact are arranged relative to each other and the distance between them is greater than the distance of the clamping gap between the first contact and the second contact, the opening angles at both ends of the moving contact can be made greater than the distance of the clamping gap between the first contact and the second contact, thereby making it easier to plug the moving contact and the static contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the front side of the moving contact of the utility model;

[0022] Figure 2 This is a schematic structural diagram of the back side of the moving contact of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the disassembled moving contact of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the contact support of the utility model;

[0025] Figure 5 This is a schematic structural diagram of the fixed shaft of the utility model;

[0026] The numbers in the accompanying drawings include: first contact 1; second contact 2; contact support 3; fixed shaft 4; elastic member 5; groove 31; side 32; support portion 33; limiting boss 34; first mounting portion 51; second mounting portion 52; first limiting portion 41; second limiting portion 42; first mounting hole 43; arc-shaped protrusion 6. DETAILED DESCRIPTION

[0027] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the present utility model. The protection scope of the present utility model is not limited to the description of the following embodiments.

[0028] The isolating switch includes a shell and internal switch contacts. The shell includes a base. The switch contacts include a moving contact and two static contacts. The moving contact and the static contact are installed on the base. The static contact is fixedly installed on the base. The moving contact can be rotatably installed in the base and connected and disconnected with the static contact by rotation. The moving contact is a long plate-shaped structure with a rotating setting in the middle and a clamping gap at both ends. The moving contact is clamped and connected with the two static contacts through the clamping gap at both ends. When the moving contact rotates to a certain angle, its two ends can contact and close with the two static contacts to achieve circuit conduction. The moving contact can be disconnected from the two static contacts by rotating again to achieve circuit disconnection. The isolating switch is usually connected in series in the circuit, and the conduction and disconnection of the circuit are controlled by connecting and disconnecting the moving contact and the two static contacts.

[0029] like Figure 1 、 Figure 2 and Figure 3 As shown, the present application provides a disconnector contact, including a moving contact, wherein the moving contact includes a first contact 1 and a second contact 2 arranged opposite to each other, wherein both ends of the first contact 1 and the second contact 2 have a clamping gap for clamping a static contact, wherein: Figure 1 is a structural diagram of the front side of the moving contact, Figure 2 is a structural diagram of the back side of the moving contact, Figure 3 It is a schematic diagram of the structure of the disassembled moving contact.

[0030] The moving contact also includes a contact support 3, at least one fixed shaft 4 and at least one elastic member 5. Two grooves 31 are provided on the opposite sides of the contact support 3. The two grooves 31 are a through structure along the length direction of the moving contact, and are used for the two ends of the first contact 1 and the second contact 2 to extend. The middle parts of the first contact 1 and the second contact 2 are respectively placed in the two grooves 31. At least one elastic member 5 is provided on the opposite sides of the first contact 1 and / or the second contact 2 to provide an inward clamping force for the first contact 1 and the second contact 2, so that the clamping gap at both ends of the first contact 1 and the second contact 2 clamps the static contact. At least one fixed shaft 4 passes through the middle parts of the first contact 1, the second contact 2, the contact support 3 and the elastic member 5, fixing the first contact 1, the second contact 2, the contact support 3 and the elastic member 5 as a whole.

[0031] The present application adds a contact support 3 in the middle of the first contact 1 and the second contact 2. The contact support 3 includes two grooves 31 that pass through the length direction of the moving contact. The middle parts of the first contact 1 and the second contact 2 are respectively placed in the two grooves 31, and then at least one elastic member 5 is provided on the back sides of the first contact 1 and the second contact 2 to provide a clamping force for the moving contact and a clamping force for clamping the static contact for the clamping gap at both ends of the moving contact. The first contact 1, the second contact 2, the contact support 3 and the elastic member 5 are fixedly connected as a whole by a fixed shaft 4 passing through the first contact 1, the second contact 2, the contact support 3 and the elastic member 5. The present application enhances the structural strength of the moving contact by providing the contact support 3, thereby preventing the first contact 1 and the second contact 2 from being loosely fixed and shaking relative to each other during use.

[0032] Preferably, Figure 4 As shown, the contact support 3 has an "I"-shaped cross-section, comprising two side portions 32 and a support portion 33. The two side portions 32 are perpendicular to the support portion 33. The support portion 33 is located between the first contact 1 and the second contact 2, and the two surfaces of the support portion 33 are respectively in contact with the first contact 1 and the second contact 2. The "I"-shaped contact support 3 can effectively wrap and protect the first contact 1 and the second contact 2, making the first contact 1 and the second contact 2 structurally wrapped as a whole.

[0033] Furthermore, the first contact 1 and the second contact 2 are flat plate structures, and the supporting portion 33 of the contact support 3 forms the clamping gap at both ends of the first contact 1 and the second contact 2 , and the distance of the clamping gap is the same as the thickness of the supporting portion 33 .

[0034] Furthermore, the first contact 1 and the second contact 2 may not be absolutely flat plate structures, and the first contact 1 and the second contact 2 may also have a bending structure at both ends. The bending portion of the first contact 1 relative to the second contact 2 is parallel to the bending portion of the second contact 2 relative to the first contact 1, and the two ends of the first contact 1 are bent toward the two ends of the second contact 2 and / or the two ends of the second contact 2 are bent toward the two ends of the first contact 1, which can reduce the clamping gap between the two ends of the first contact 1 and the second contact 2. The two ends of the first contact 1 are bent away from the two ends of the second contact 2 and / or the two ends of the second contact 2 are bent away from the two ends of the first contact 1, which can increase the clamping gap between the two ends of the first contact 1 and the second contact 2. By providing bending portions at both ends of the first contact 1 and the second contact 2, the size of the clamping gap at both ends of the first contact 1 and the second contact 2 can be changed, thereby matching static contacts of different thicknesses.

[0035] Further, such as Figure 4 As shown, a plurality of limiting bosses 34 of the same height are provided on both sides of the supporting portion 33 of the contact support 3 . Providing a plurality of limiting bosses 34 of the same height can make the movable contact fit the contact support 3 better.

[0036] Preferably, Figure 3 As shown, the moving contact includes two elastic members 5, and the two elastic members 5 are respectively placed on the two opposite sides of the first contact 1 and the second contact 2; or the moving contact includes one elastic member 5, and one elastic member 5 is placed on the opposite side of the first contact 1 or the second contact 2, and can be placed on the first contact 1 and tightly against the first contact 1, or can be placed on the second contact 2 and tightly against the second contact 2.

[0037] Preferably, the elastic member 5 is a long plate-shaped structure, with first mounting portions 51 provided at both ends of the elastic member 5. The first contact 1 and / or the second contact 2 are provided with second mounting portions 52 that cooperate with and limit the first mounting portions 51. By providing the first mounting portions 51 and the second mounting portions 52, the elastic member 5 is fixed to the first contact 1 and / or the second contact 2.

[0038] Furthermore, the first mounting portion 51 is a raised portion at both ends of the elastic member 5, and the raised portion can be a boss or a chamfer formed by bending at both ends of the elastic member 5. The second mounting portion 52 is a groove structure or a hole structure on the first contact 1 and / or the second contact 2, or, the first mounting portion 51 can be a boss, and the second mounting portion 52 is a groove structure or a hole structure at both ends of the elastic member 5. In other embodiments, the elastic member 5 can also be a rod-shaped structure, which all fall within the scope of protection of the present application.

[0039] Preferably,Figure 3 and Figure 5 As shown, the moving contact includes a fixed shaft 4, which is preferably cylindrical. A first limiting portion 41 is provided at one end of the fixed shaft 4, and a second limiting portion 42 is provided at the other end. Of course, a non-strictly cylindrical structure can also achieve the same effect, which will not be repeated here.

[0040] Furthermore, when the moving contact includes an elastic member 5, the first limiting portion 41 of the fixed shaft 4 can be a disc having a diameter larger than the cross-sectional diameter of the fixed shaft 4, and the disc is arranged at one end of the fixed shaft 4 and is integrally formed with the fixed shaft 4, or the first limiting portion 41 can be a plurality of bosses extending to the surrounding areas from one end of the fixed shaft 4, and the extension direction of the bosses is perpendicular to the installation direction of the fixed shaft 4, and the bosses are integrally formed with the fixed shaft 4, and the first limiting portion 41 at one end of the fixed shaft 4 is against the elastic member 5; in this embodiment, the second limiting portion 42 is a cylinder with a diameter smaller than the diameter of the fixed shaft 4, and is integrally formed with the fixed shaft 4, and the first contact 1 or the second limiting portion 41 is a cylinder with a diameter smaller than the diameter of the fixed shaft 4. The second contact 2 is provided with a first mounting hole 43 or a mounting groove that cooperates with the second limiting portion 42 and is fixed thereto, and the second limiting portion 42 is riveted or welded to the first mounting hole 43 or the mounting groove of the first contact 1 or the second contact 2; or the second limiting portion 42 can also be a second mounting hole passing through one end and a second mounting shaft that cooperates with the second mounting hole, the second mounting shaft is installed in the second mounting hole, the length of the second mounting shaft is greater than the length of the second mounting hole, the second mounting shaft extends through the two ends of the second mounting hole, and is against the first contact 1 or the second contact 2, and the penetration direction of the second mounting hole is perpendicular to the installation direction of the fixed shaft 4.

[0041] Alternatively, when the movable contact includes one or two elastic members 5, the first limiting portion 41 and the second limiting portion 42 are both a second mounting hole passing through one end and a second mounting shaft cooperating with the second mounting hole, the length of the second mounting shaft being greater than the length of the second mounting hole, the second mounting shaft extending through both ends of the second mounting hole, abutting against the first contact 1 and the second contact 2, and the penetration direction of the second mounting hole being perpendicular to the installation direction of the fixed shaft 4; or, the second limiting portion 42 is an annular groove at the end of the fixed shaft 4 and a clamping ring sleeved on the groove, the second limiting portion 42 passes through the first contact 1, the second contact 2, the contact support 3 and the elastic member 5, and the clamping ring is sleeved on the annular groove. Obviously, depending on the number and shape (rod-shaped or sheet-shaped) of the elastic members 5, the structures of the first limiting portion 41 and the second limiting portion 42 can have multiple options and combinations, which will not be repeated here, and all of these fall within the scope of protection of this application.

[0042] In other embodiments, the moving contact may also include multiple fixed shafts 4, which will not be described in detail.

[0043] Preferably, Figure 1 、 Figure 2 and Figure 3 As shown, the side edges of both ends of the first contact 1 and the second contact 2 can be raised to provide an arc-shaped protrusion 6. The arc-shaped protrusion 6 of the first contact 1 and the arc-shaped protrusion 6 of the second contact 2 are arranged opposite to each other and the distance between them is greater than the distance of the clamping gap between the first contact 1 and the second contact 2. By providing the arc-shaped protrusion 6 at the ends of the first contact 1 and the second contact 2, the opening angle thereof can be greater than the distance of the clamping gap between the first contact 1 and the second contact 2, thereby making it more convenient for the moving contact and the static contact to be plugged in.

[0044] Furthermore, both sides of the first contact 1 and the second contact 2 are provided with an arc-shaped protrusion 6, or one side of the first contact 1 and the second contact 2 is provided with an arc-shaped protrusion 6. The arc-shaped protrusion 6 conforms to the rotation direction of the movable contact and is plug-fitted with the static contact. When the movable contact rotates clockwise or counterclockwise to be plug-fitted with the static contact, the arc-shaped protrusion 6 is provided on one side of the first contact 1 and the second contact 2. The movable contact can be connected to the static contact by rotating clockwise or counterclockwise. In this case, the arc-shaped protrusion 6 is provided on both sides of the first contact 1 and the second contact 2, respectively, meeting the conditions for connecting to the static contact by either clockwise or counterclockwise rotation.

[0045] Of course, in some less desirable embodiments, the arcuate protrusions 6 may not be arranged opposite each other. They may be provided on only one side, for example, only on the first contact 1 or the second contact 2, thereby reducing production costs. Therefore, the connection relationship between the arcuate protrusion 6 and the moving contact can have a variety of embodiments. All of the above embodiments that can be devised by those skilled in the art based on the existing technology are within the scope of protection of this application. Furthermore, the arcuate protrusion 6 may not be an absolute arcuate structure, as long as it facilitates insertion with the static contact and achieves the same technical effect. These embodiments are within the scope of protection of this application and will not be elaborated on here.

[0046] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are conventionally placed directions or positional relationships during use. They are intended solely for ease of description and do not imply that the devices or components referred to must have a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating relative importance.

[0047] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. An isolating switch contact, comprising a moving contact, the moving contact including a first contact (1) and a second contact (2) arranged opposite to each other, both ends of the first contact (1) and the second contact (2) having a clamping gap for clamping a static contact, characterized in that, the moving contact further includes a contact support (3), at least one fixed shaft (4) and at least one elastic member (5), two grooves (31) are provided on two opposite surfaces of the contact support (3), the two grooves (31) are through structures along the length direction of the moving contact, the middle parts of the first contact (1) and the second contact (2) are respectively placed in the two grooves (31), at least one elastic member (5) is arranged on the opposite surface of the first contact (1) and / or the second contact (2), and at least one fixed shaft (4) penetrates through the middle parts of the first contact (1), the second contact (2), the contact support (3) and the elastic member (5) to fix the first contact (1), the second contact (2), the contact support (3) and the elastic member (5) into a whole.

2. The disconnector contact according to claim 1, characterized in that, The contact support (3) includes two side parts (32) and a support part (33), the support part (33) is located in the middle of the two side parts (32), and the two side parts (32) are respectively perpendicular to the support part (33), and the support part (33) is located between the first contact (1) and the second contact (2).

3. The disconnector contact according to claim 2, characterized in that, The first contact (1) and the second contact (2) are of a flat plate structure, two sides of the support part (33) are respectively attached to the first contact (1) and the second contact (2), and the support part (ss) of the contact support (3) forms the clamping gap at both ends of the first contact (1) and the second contact (2).

4. The disconnector contact according to claim 2, characterized in that, A plurality of limiting bosses (34) with the same height are provided on two sides of the support part (33) of the contact support (3).

5. The disconnector contact according to claim 1, characterized in that, The moving contact includes two elastic members (5), and the two elastic members (5) are respectively placed on the opposite surfaces of the first contact (1) and the second contact (2); or the moving contact includes one elastic member (5), and one elastic member (5) is placed on one of the opposite surfaces of the first contact (1) or the second contact (2).

6. The disconnector contact according to claim 1, characterized in that, The elastic member (5) is of a long plate-like structure, and first mounting parts (51) are provided at both ends of the elastic member (5), and second mounting parts (52) for cooperating with and limiting the first mounting parts (51) are provided on the first contact (1) and / or the second contact (2).

7. The disconnector contact according to claim 6, wherein The first mounting part (51) is a convex part at both ends of the elastic member (5), and the convex part is a boss or a chamfer formed by bending both ends of the elastic member (5), and the second mounting part (52) is a groove structure or a hole-like structure on the first contact (1) and / or the second contact (2).

8. The disconnector contact according to claim 1, characterized in that, The moving contact includes one fixed shaft (4), a first limiting part (41) is provided at one end of the fixed shaft (4), and a second limiting part (42) is provided at the other end.

9. The disconnector contact according to claim 8, characterized in that, The first limiting part (41) is a disc with a diameter larger than that of the fixed shaft (4), the second limiting part (42) is a cylinder with a diameter smaller than that of the fixed shaft (4), and a first mounting hole (43) or a mounting groove for cooperating with and fixing the second limiting part (42) is provided on the first contact (1) or the second contact (2); alternatively, the first limiting part (41) and / or the second limiting part (42) is a second mounting hole penetrating one end and a second mounting shaft cooperating with the second mounting hole, the second mounting shaft is installed in the second mounting hole, the length of the second mounting shaft is greater than the length of the second mounting hole, and the penetrating direction of the second mounting hole is perpendicular to the mounting direction of the fixed shaft (4).

10. The disconnector contact according to claim 1, characterized in that, Arc-shaped protruding parts (6) are provided on the side edges of both ends of the first contact (1) and the second contact (2). The arc-shaped protruding parts (6) of the first contact (1) and the arc-shaped protruding parts (6) of the second contact (2) are arranged oppositely, and the distance between them is greater than the distance of the clamping gap between the first contact (1) and the second contact (2).