A double-layer screw seal structure plug

Abstract

The utility model relates to the field of sealed plug discloses a double -layer screw seal structure plug. In the utility model, the inside movable setting of shell has rubber core, and the both sides surface fixed setting elastic part of rubber core is elastically connected with the inner wall of shell, the inside setting of rubber core has signal terminal, the bottom end surface of shell is provided with plug socket seal ring, and the side surface of shell is provided with the outgoing line seal ring, the top end surface of shell sets up flat pad integrated screw, and the inside surface of shell is provided with sealed flat pad who is penetrated by flat pad integrated screw, and the outside connection of flat pad integrated screw and shell is provided with sealed flat pad, shield terminal is replaced by signal terminal, has saved shield terminal and shield wire clamp two materials, assembly technology simplifies, the fixed structure of rubber core and shell changes into elastic cooperation, has reduced assembly difficulty, installs screw O ring and changes into flat pad seal, changes into flat pad integrated structure, increases a layer of seal under screw, can use the occasion of higher protection requirement.

Description

Technical Field

[0001] This utility model belongs to the field of sealing plug technology, specifically a double-layer screw sealing structure plug. Background Technology

[0002] Currently, these square connectors on the market have complex shielding structures, making wire assembly difficult. The fixing structure between the core and the shell is a hard interference, requiring high precision in materials and dimensions. Assembly requires a jig for pressing in, and the positional accuracy must be ensured during the pressing process, otherwise the snap-fit ​​points will be damaged. The O-rings in the screw part are too small, resulting in insufficient sealing stability. They are prone to problems when used in machine tool environments with a lot of oil.

[0003] However, traditional square connector assembly processes are difficult, inefficient, and costly. The core assembly is difficult, the snap-fit ​​points are easily damaged, causing the core to fall off and the screw O-ring seal to be unstable. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned above, such as the difficulty in assembling the rubber core and the easy damage to the fastening points, which can cause the rubber core to fall off, and to improve the problem of unstable sealing of the screw O-ring, by providing a double-layer screw sealing structure plug.

[0005] The technical solution adopted by this utility model is as follows: A double-layer screw sealing structure plug includes a flat washer integrated screw, a housing, and a wire outlet sealing ring. A rubber core is movably disposed inside the housing, and elastic elements are fixedly disposed on both sides of the rubber core. The elastic elements are elastically connected to the inner wall of the housing. A signal terminal is disposed inside the rubber core. A plug and socket sealing ring is disposed on the bottom surface of the housing, and a wire outlet sealing ring is disposed on one side surface of the housing. A flat washer integrated screw is disposed on the top surface of the housing. A sealing flat washer is disposed through the inner surface of the housing by the flat washer integrated screw, and a sealing flat washer is disposed at the connection between the flat washer integrated screw and the outer side of the housing.

[0006] In a preferred embodiment, the surface of the lead-out sealing ring is sequentially provided with a claw and a tail clamp nut, and the tail clamp nut is disposed around the claw.

[0007] In a preferred embodiment, the inside of the rubber core is provided with a foolproof groove, and the outer surface of the signal terminal is correspondingly provided with a foolproof block.

[0008] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0009] 1. This utility model uses an integrated flat washer screw with a sealing flat washer to form a double-layer seal on the inner and outer sides of the housing, replacing the traditional small O-ring seal and significantly improving sealing stability. It is especially suitable for complex scenarios such as machine tools with heavy oil and dirt, solving the pain point of unstable screw seals. The elastic elements on both sides of the rubber core are elastically connected to the inner wall of the housing, replacing the traditional hard interference fixation, reducing the requirements for material and dimensional accuracy, avoiding damage to the snap points during assembly, and solving the problems of difficult assembly and easy detachment of the rubber core. The plug and socket sealing ring seals the mating surface between the housing and the socket, and the cable exit sealing ring seals the cable exit point between the cable and the housing. Together with the double-layer screw seal, it forms an all-round seal at the mating surface, cable exit point, and screw connection point, preventing oil, water vapor, and dust from entering and protecting the internal signal terminals. The rubber core provides a stable mounting carrier for the signal terminals, and the buffering effect of the elastic elements can absorb external vibrations, prevent the signal terminals from loosening, ensure stable signal transmission, and is suitable for vibration scenarios such as machine tools.

[0010] 2. In this utility model, the claw and the tail clip nut cooperate to clamp the cable passing through the outlet sealing ring, preventing the cable from detaching from the signal terminal due to external pulling, improving the stability of the cable connection, and adapting to scenarios of frequent movement or dragging; when the tail clip nut is tightened, it pushes the claw to retract, the claw clamps the cable and squeezes the outlet sealing ring, making the sealing ring fit more tightly against the cable and the shell, further enhancing the sealing effect at the outlet, and preventing oil and moisture from seeping in from the gap between the cable and the sealing ring. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the exploded structure of the double-layer screw sealing structure plug of this utility model;

[0012] Figure 2 This is a schematic diagram of the connection structure between the flat washer integrated screw and the outer shell in this utility model;

[0013] Figure 3 This is a schematic diagram of the outer shell structure in this utility model;

[0014] Figure 4 This is a top view of the double-layer screw sealing structure plug of this utility model;

[0015] Figure 5 This is a schematic diagram of the adhesive core connection structure in this utility model.

[0016] The markings in the diagram are: 1. Flat washer integrated screw; 2. Sealing flat washer; 3. Housing; 4. Glue core; 5. Signal terminal; 6. Plug and socket sealing ring; 7. Outlet sealing ring; 8. Claw; 9. Tail clip nut; 10. Elastic element. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] Example:

[0019] Reference Figure 1-5 A double-layer screw-sealed plug includes a flat washer integrated screw 1, a housing 3, and a wire outlet sealing ring 7. A rubber core 4 is movably disposed inside the housing 3, and elastic elements 10 are fixedly disposed on both sides of the rubber core 4. The elastic elements 10 are elastically connected to the inner wall of the housing 3. A signal terminal 5 is disposed inside the rubber core 4. A plug-socket sealing ring 6 is disposed on the bottom surface of the housing 3, and a wire outlet sealing ring 7 is disposed on one side surface of the housing 3. The flat washer integrated screw 1 is disposed on the top surface of the housing 3. A sealing flat washer 2 is disposed through the inner surface of the housing 3, and a sealing flat washer 2 is disposed at the connection between the flat washer integrated screw 1 and the outer side of the housing 3. The flat washer integrated screw 1, in conjunction with the sealing flat washer 2, forms a double-layer seal on the inner and outer sides of the housing 3, replacing the traditional, smaller O-ring seal, significantly improving sealing performance. To improve sealing stability, especially suitable for complex scenarios such as machine tools with heavy oil stains, and to solve the pain point of unstable screw seals, the elastic elements 10 on both sides of the core 4 are elastically connected to the inner wall of the outer shell 3, replacing the traditional hard interference fixation, reducing the requirements for material and dimensional accuracy, avoiding damage to the snap points during assembly, and solving the problems of difficult assembly and easy detachment of the core. The plug and socket sealing ring 6 seals the mating surface between the outer shell and the socket, and the cable exit sealing ring 7 seals the cable exit point between the cable and the outer shell. Together with the double-layer screw seal, it forms an all-round seal at the mating surface, the cable exit point, and the screw connection point, preventing oil stains, water vapor, and dust from entering and protecting the internal signal terminal 5. The core 4 provides a stable mounting carrier for the signal terminal 5, and the buffering effect of the elastic elements can absorb external vibrations, prevent the signal terminal from loosening, ensure stable signal transmission, and is suitable for vibration scenarios such as machine tools.

[0020] Reference Figure 1 The surface of the outlet sealing ring 7 is sequentially provided with claws 8 and tail clip nuts 9, with the tail clip nuts 9 located around the claws 8. The claws 8 and tail clip nuts 9 cooperate to clamp the cable passing through the outlet sealing ring 7, preventing the cable from detaching from the signal terminal 5 due to external pulling, thus improving the stability of the cable connection and adapting to scenarios of frequent movement or dragging. When the tail clip nuts 9 are tightened, they push the claws 8 to retract, clamping the cable and squeezing the outlet sealing ring 7, making the sealing ring fit more tightly against the cable and the outer shell 3, further enhancing the sealing effect at the outlet and preventing oil and moisture from seeping in through the gap between the cable and the sealing ring.

[0021] Reference Figure 1-5 The core 4 has an anti-misalignment groove inside, and the outer surface of the signal terminal 5 is correspondingly provided with an anti-misalignment block. The anti-misalignment design can prevent the signal terminal from being inserted into the core in reverse or misaligned, ensuring the correct installation direction of the terminal, improving assembly efficiency, and preventing signal transmission failure due to terminal misalignment. At the same time, the interference fit between the anti-misalignment groove 11 and the anti-misalignment block 12 can lock the position of the signal terminal 5 in the core 4. With the buffer of the elastic element 10, it can further prevent the terminal from loosening due to vibration and ensure the stability of signal transmission.

[0022] The implementation principle of this utility model's double-layer screw-sealed plug embodiment is as follows:

[0023] During assembly, the signal terminal 5 is first embedded inside the core 4. Then, the elastic elements 10 on both sides of the core are compressed and placed inside the housing 3. After the elastic elements return to their original position, they fit tightly against the inner wall of the housing, fixing the core position through elastic force. This eliminates the need for a fixture, reducing assembly difficulty. Next, the sealing gasket 2 is fitted onto the integrated flat gasket screw 1. The screw passes through the threaded hole at the top of the housing. After tightening, the sealing gasket on the inner side of the housing is pressed between the screw head and the inner wall of the housing, while the sealing gasket on the outer side fits against the outer wall of the housing and the screw head, forming a double seal. When the plug and socket are connected, the plug and socket sealing ring 6 is pressed between the bottom of the housing and the socket, achieving a seal at the connection surface. After the cable passes through the outlet sealing ring 7, the sealing ring fits against the cable and the outlet of the housing, achieving a seal at the outlet. The elastic elements continuously provide elastic support, preventing the core from falling off; the all-around sealing structure prevents external impurities from entering, ensuring stable signal transmission from the signal terminal.

[0024] During cable installation, first pass the cable through the tail clip nut 9, the claw 8, and the outlet sealing ring 7, and insert it into the housing 3 to connect with the signal terminal 5. Then, tighten the tail clip nut 9 clockwise. The nut moves inward along the external thread of the housing, pushing the claw 8 to retract. The claw's jaws tightly fit against the outer wall of the cable, achieving cable clamping and fixation. At the same time, the retraction of the claw compresses the outlet sealing ring 7, causing the sealing ring to elastically deform and fill the tiny gap between the cable and the outlet of the housing, enhancing the sealing effect. When the cable is pulled, the clamping force of the claw resists the pulling force, preventing the cable from detaching from the signal terminal. After the seal is strengthened, it further prevents external oil and moisture from entering, and together with the basic seal of the outlet sealing ring, improves the protection level at the cable outlet.

[0025] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A double-layer screw-sealed plug, comprising a flat washer integrated screw (1), a housing (3), and a wire outlet sealing ring (7), characterized in that: The housing (3) has a movable core (4) inside, and elastic elements (10) are fixedly provided on both sides of the core (4). The elastic elements (10) are elastically connected to the inner wall of the housing (3). The core (4) has a signal terminal (5) inside. The bottom surface of the housing (3) has a plug and socket sealing ring (6), and one side surface of the housing (3) has a wire exit sealing ring (7). The top surface of the housing (3) has a flat washer integrated screw (1). The flat washer integrated screw (1) penetrates the inner surface of the housing (3) and has a sealing flat washer (2). The flat washer integrated screw (1) and the outer side of the housing (3) are connected by a sealing flat washer (2).

2. The plug with a double-layer screw sealing structure as described in claim 1, characterized in that: The surface of the outlet sealing ring (7) is sequentially provided with a claw (8) and a tail clip nut (9), and the tail clip nut (9) is located around the claw (8).

3. The plug with a double-layer screw sealing structure as described in claim 1, characterized in that: The core (4) has a foolproof groove inside, and the outer surface of the signal terminal (5) is provided with a foolproof block.

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