A touch-proof waterproof MSD maintenance switch

Abstract

The utility model discloses a kind of MSD maintenance switches of anti-touch waterproof, including plug shell, socket and fuse, the plug shell is equipped with shell locking structure, the fuse is fixed as an organic whole with plug shell at shell locking structure by screw;The MSD maintenance switch further includes insulating screw, and the insulating screw simultaneously locks plug shell, fuse and socket.This utility model replaces traditional metal screw with insulating screw, reduces the quantity of metal screw used, simultaneously avoids the risk of electric shock, the risk of conduction and maintenance compatibility problem existing in metal screw;Meanwhile, insulating screw has waterproofness, without additional cover plate, can satisfy the demand of MSD quick disconnection;In addition, insulating screw is also provided with rotation-stopping structure, and the problem that insulating screw itself torque is insufficient and is easily reversed can be overcome.

Description

Technical Field

[0001] This utility model belongs to the field of maintenance switch technology, and specifically relates to an MSD maintenance switch that is waterproof and shockproof. Background Technology

[0002] The manual maintenance switch, also known as the MSD switch, is a high-voltage connector with a fuse or shorting copper busbar. It is used in electric vehicles to mechanically disconnect the high-voltage connection during high-voltage maintenance, thus protecting the safety of maintenance personnel.

[0003] Traditional MSD switch fuses use metal screws to secure the casing. These screws pose significant safety hazards in practical applications, specifically: direct contact risk – during installation or maintenance, the screws may be exposed due to insulation aging, moisture absorption and corrosion, or the cover falling off. If maintenance personnel accidentally touch live parts (such as fuse terminals or the conductive casing), it could lead to a high-voltage electric shock. Tests show that when the system voltage is 400V DC, contact between exposed screws and a human body can generate a leakage current >30mA, far exceeding the safety limit (10mA); indirect conduction risk – in humid or polluted environments, metal screws may form creepage paths, causing insulation failure between the casing and internal live components. For example, in salt spray tests, electrolytic corrosion appeared on the surface of the metal screws after 48 hours, with the insulation resistance dropping to <1MΩ; furthermore, there are maintenance compatibility issues. Traditional designs require an additional insulating cover to avoid electric shock, making disassembly cumbersome and violating the MSD's design intent of quick disconnection. Therefore, there is an urgent need for a locking method that can both eliminate the risk of electric shock and ensure mechanical reliability.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a waterproof and shockproof MSD maintenance switch, thereby overcoming the defects in the prior art.

[0006] To achieve the above objectives, this utility model provides a waterproof and shockproof MSD maintenance switch, including a plug housing, a socket, and a fuse. The plug housing is provided with a housing locking structure, and the fuse and the plug housing are fixed together at the housing locking structure by screws. The MSD maintenance switch also includes an insulating screw, which simultaneously locks the plug housing, the fuse, and the socket.

[0007] Furthermore, preferably, the insulating screw includes a body section and a threaded section.

[0008] Furthermore, as a preferred embodiment, the outer wall of the main body section is provided with an anti-rotation structure to prevent the insulating screw from reversing.

[0009] Furthermore, as a preferred embodiment, the anti-rotation structure is a protrusion structure provided on the outer wall of the main body section.

[0010] Furthermore, as a preferred embodiment, the outer wall of the main body segment is also provided with a barbed protrusion structure.

[0011] Furthermore, as a preferred embodiment, a spring washer structure is provided at the junction of the main body section and the threaded section of the insulating screw.

[0012] Furthermore, as a preferred embodiment, the outer wall of the main body section of the insulating screw is provided with a sealing ring.

[0013] Furthermore, as a preferred embodiment, the main body segment of the insulating screw is provided with an operating hole.

[0014] Furthermore, preferably, the diameter of the main body section of the insulating screw is larger than the diameter of the threaded section.

[0015] Furthermore, as a preferred option, the insulating screw is an injection-molded metal screw.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention uses insulated screws instead of traditional metal screws, which can avoid the risks of electric shock, conductivity, and maintenance compatibility issues associated with metal screws.

[0018] The insulating screw of this invention is also waterproof, eliminating the need for an additional cover plate and meeting the requirements for quick disconnection of MSD.

[0019] The insulating screw of this invention is equipped with an anti-rotation structure, which can overcome the problem that the insulating screw itself is prone to reverse rotation due to insufficient torque.

[0020] Compared with the traditional quick-connect (male and female terminals) MSD switch with fuse, the advantages of this utility model are low cost, simple manufacturing process and improved product quality.

[0021] Compared with the traditional method of using metal screws to lock the fuse and then using metal screws to lock the outer casing, this utility model reduces the number of metal screws used and avoids the risks of electric shock, conduction risks and maintenance compatibility issues that exist when metal screws are used to directly lock the fuse. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an MSD maintenance switch that is waterproof and resistant to contact.

[0023] Figure 2This is an enlarged schematic diagram of the plug housing of a waterproof and shockproof MSD maintenance switch according to this utility model.

[0024] Figure 3 This is a cross-sectional view of an MSD maintenance switch that is waterproof and resistant to contact.

[0025] Figure 4 This is a partially enlarged cross-sectional view of an MSD maintenance switch that is waterproof and resistant to contact with objects, according to this utility model.

[0026] Figure 5 This is a schematic diagram of the locking screw of a waterproof and shockproof MSD maintenance switch according to the present invention.

[0027] Figure 6 This is a cross-sectional view of the locking screw of a waterproof and shockproof MSD maintenance switch according to this utility model.

[0028] Figure 7 This is a partially enlarged schematic diagram of the locking screw of a waterproof and shockproof MSD maintenance switch according to this utility model;

[0029] Reference numerals: 1-Plug housing, 11-Housing locking structure, 12-Screw, 2-Socket, 3-Fuse, 4-Insulating screw, 41-Main body section, 42-Threaded section, 43-Protruding structure, 44-Hook-shaped boss structure, 45-Spring washer structure, 46-Sealing ring, 47-Operating hole, 48-Buffer hole. Detailed Implementation

[0030] The specific embodiments of this utility model are described in detail below, but it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0031] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0032] Example 1:

[0033] like Figures 1-7 As shown, a waterproof and shockproof MSD maintenance switch includes a plug housing 1, a socket 2, and a fuse 3. The plug housing 1 is provided with a housing locking structure 11. The fuse 3 and the plug housing 1 are fixed together at the housing locking structure 11 by screws 12. The MSD maintenance switch also includes an insulating screw 4, which simultaneously locks the plug housing 1, the fuse 3, and the socket 2.

[0034] In this embodiment, as a specific solution, the outer shell locking structure 11 is a baffle-shaped structure disposed inside the plug outer shell 1, the fuse 3 is clamped in the baffle-shaped structure, and is pre-locked into one piece by screws 12.

[0035] In this embodiment, as a specific solution, the insulating screw includes a main body section 41 and a threaded section 42. When the plug housing 1 and the socket 2 are mated, the threaded section 42 locks the socket 2. The main function of the main body section 41 is to provide insulation, waterproofing, and to be stuck inside the plug housing 1 to prevent it from falling off.

[0036] In this embodiment, as a specific solution, the outer wall of the main body segment 41 is provided with an anti-rotation structure to prevent the insulating screw from reversing.

[0037] In this embodiment, as a specific solution, the anti-rotation structure is a protrusion structure 43 provided on the outer wall of the main body section 41.

[0038] In this embodiment, as a specific solution, the outer wall of the main body section 41 is also provided with a barbed boss structure 44. The main function of this structure is to prevent the insulating screw 4 from falling out of the plug housing 1.

[0039] In this embodiment, as a specific solution, a spring washer structure 45 is provided at the junction of the insulating screw body section 41 and the threaded section 42.

[0040] In this embodiment, as a specific solution, a sealing ring 46 is provided on the outer wall of the insulating screw body section 41.

[0041] In this embodiment, as a specific solution, the main body section 41 of the insulating screw is provided with an operating hole 47; on the one hand, the operating hole makes it easier for the insulating screw to lock the plug housing 1, the socket 2 and the fuse 3, and on the other hand, it also makes it easier for the main body section 41 to expand and tighten inside the plug housing 1.

[0042] In this embodiment, as a specific solution, the diameter of the insulating screw body section 41 is larger than the diameter of the threaded section 42, so that the insulating screw as a whole has a certain strength.

[0043] In this embodiment, as a specific solution, the insulating screw can be a metal screw encapsulated in plastic injection molding, or more precisely, a plastic wrapping layer can be injection molded onto the metal screw to form an insulating screw; alternatively, a screw made entirely of plastic injection molding can be used.

[0044] In another optimized embodiment, the outer wall of the main body section 41 of the insulating screw is also provided with a plurality of buffer holes 48, which are spaced apart from the protrusion structure 43; the combination of the buffer holes 48 and the protrusion structure 43 can ensure that the main body section has a certain buffer space in the plug housing 1, so as not to damage the plug housing 1 when thermal expansion occurs.

[0045] The working principle of this utility model is as follows:

[0046] Initially, the insulating screw is first installed on the plug housing 1 and the fuse 3 as a whole. The main body section 41 of the insulating screw is located inside the plug housing 1. The insulating screw is turned from the operating hole 47 of the main body section 41 to lock its threaded section 42 into the socket 2. When disassembling, the plug housing 1 and the socket 2 can be separated by turning the insulating screw.

[0047] This utility model has the following advantages:

[0048] 1. This utility model uses insulated screws instead of traditional metal screws. Compared with the traditional solution of using metal screws to lock the fuse and then using metal screws to lock the outer shell, it reduces the number of metal screws used and avoids the risks of electric shock, conduction, and maintenance compatibility issues associated with metal screws.

[0049] 2. The insulating screw of this utility model is also waterproof, eliminating the need for an additional cover plate and meeting the requirements for quick disconnection of MSD.

[0050] 3. The insulating screw of this utility model is equipped with an anti-rotation structure, which can overcome the problem that the insulating screw itself is prone to reverse rotation due to insufficient torque.

[0051] 4. Compared with the traditional quick-connect (male and female terminals) MSD switch with fuse, the advantages of this utility model are low cost, simple manufacturing process and improved product quality.

[0052] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A touch-proof, waterproof MSD service switch comprising a plug housing, a socket, and a fuse, characterized in that: The plug housing is provided with a housing locking structure, and the fuse and the plug housing are fixed together by screws at the housing locking structure; the MSD maintenance switch also includes an insulating screw, which locks the plug housing, fuse and socket simultaneously.

2. The MSD maintenance switch with anti-touch and waterproof properties according to claim 1, characterized in that: The insulating screw includes a body section and a threaded section.

3. The MSD maintenance switch with anti-touch and waterproof properties according to claim 2, characterized in that: The outer wall of the main body section is provided with an anti-rotation structure to prevent the insulating screws from reversing.

4. The MSD maintenance switch that is waterproof and resistant to contact as described in claim 3, characterized in that: The anti-rotation structure is a protrusion structure installed on the outer wall of the main body section.

5. The MSD maintenance switch with anti-touch and waterproof properties according to claim 2, characterized in that: The outer wall of the main body section is also provided with a barbed protrusion structure.

6. The MSD maintenance switch with anti-touch and waterproof properties according to claim 2, characterized in that: A spring washer structure is provided at the junction of the main body section and the threaded section of the insulating screw.

7. The MSD maintenance switch with anti-touch and waterproof properties according to claim 2, characterized in that: The outer wall of the main body section of the insulating screw is provided with a sealing ring.

8. The MSD maintenance switch with anti-touch and waterproof properties according to claim 2, characterized in that: The main body of the insulating screw is provided with an operating hole.

9. The MSD maintenance switch that is waterproof and resistant to contact as described in claim 2, characterized in that: The diameter of the main body section of the insulating screw is larger than the diameter of the threaded section.

10. The MSD maintenance switch with anti-touch and waterproof properties according to claim 1, characterized in that: The insulating screw is a plastic injection molded metal screw.

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