Waterproof sheath for terminal

Abstract

The application relates to the technical field of waterproof sheaths, in particular to a waterproof sheath for a wiring terminal, which comprises a shell, a wiring terminal body is embedded in the shell, extension pipes for the extension of power lines are formed at the two ends of the shell, and a clamping assembly for clamping the power lines is arranged at the extension pipes; the clamping assembly comprises a tightening piece arranged in the extension pipe and a rotating sleeve; when the rotating sleeve is threadedly connected to the outer side wall of the extension pipe, the rotating sleeve is used for driving the tightening piece to clamp the power lines; the rotating sleeve is internally provided with a sealing piece matched with the end wall of the extension pipe and used for sealing the gap between the rotating sleeve and the power lines. Through the connection of the rotating sleeve on the outer side wall of the extension pipe, the sealing piece can seal the gap between the rotating sleeve and the power lines, and the tightening piece can clamp the sheath of the power lines, so that the power lines are fixed, the power lines are prevented from moving relative to the extension pipe, and the waterproof effect of the waterproof sheath is improved.

Description

Technical Field

[0001] This application relates to the field of waterproof sheath technology, and more specifically, to a waterproof sheath for terminal blocks. Background Technology

[0002] Terminal blocks are commonly used connectors in electrical installations and wiring connections, primarily to ensure the reliability and ease of wire connections. However, in practical applications, terminal blocks need to be used in outdoor environments. Moisture in the outdoor environment (rain, dew, humidity, etc.) entering the terminal blocks can lead to risks such as leakage or short circuits. Therefore, waterproof design is necessary for terminal blocks.

[0003] Existing terminal blocks typically use tape or heat shrink tubing to achieve a waterproof effect. However, with prolonged use, the tape or heat shrink tubing ages, causing gaps to form between it and the wire. Moisture can still enter the terminal block through these gaps, resulting in limited waterproofing. Furthermore, the wires connected to the terminal blocks are prone to pulling or shifting relative to the terminal block, further widening the gaps between the tape or heat shrink tubing and the wire. This makes it even easier for moisture to enter, leading to insufficient waterproofing. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this application is to provide a waterproof sheath for terminal blocks to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A waterproof sheath for a terminal block includes an outer shell, a terminal block body is embedded inside the outer shell, and extension tubes for power supply lines to extend into the outer shell are formed at both ends of the outer shell. A clamping component for clamping the wire is provided at the extension tube.

[0007] The clamping assembly includes a clamping member and a rotating sleeve disposed inside the extension tube. When the rotating sleeve is threaded to the outer wall of the extension tube, it is used to drive the clamping member to clamp the wire. The rotating sleeve is provided with a sealing member that cooperates with the end wall of the extension tube to seal the gap between the rotating sleeve and the wire.

[0008] Furthermore, the outer wall of the extension tube is provided with an external threaded portion and an annular groove located inside the external threaded portion. Several slots are evenly distributed on the side wall near the opening of the annular groove and close to the external threaded portion. The side wall of the annular groove is provided with a slot for communicating with the extension tube corresponding to the slot.

[0009] The clamping component includes several arc-shaped blocks that slide within an annular groove. One side of the arc-shaped block is provided with a top post that engages with the groove, and the other side is provided with a top block that corresponds to the groove opening. An elastic washer ring is fitted inside the annular groove to push the arc-shaped block so that the top post extends out of the groove.

[0010] Furthermore, the outer wall of the extension tube is threaded with a plug ring for confining the arc-shaped block and the elastic washer ring within the ring groove.

[0011] Furthermore, the inner wall of the rotating sleeve is provided with an internal thread that mates with the external thread and a guide surface. When the rotating sleeve is connected to the external thread through the internal thread, it drives the guide surface to press the top post so that it retracts into the slot, thereby driving the top block to pass through the slot and press the wire.

[0012] Furthermore, the inner wall of the rotating sleeve is provided with a groove along its circumference;

[0013] The seal includes an expansion sleeve that fits over the wire and is located in a groove. When the rotating sleeve is connected to the external thread, it causes the groove to move toward the end of the extension tube so that the expansion sleeve is tightened.

[0014] Furthermore, the end of the top block that penetrates the slot is arc-shaped, and protrusions are arranged on the arc surface.

[0015] Furthermore, the outer casing has a chamber with an opening on one side, and the opening of the chamber is fitted with a removable cover plate by screws.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] This application, by connecting the rotating sleeve to the outer wall of the extension tube, enables the sealing element to seal the gap between the rotating sleeve and the wire. At the same time, it enables the clamping element to hold the outer sheath of the wire to fix the wire and prevent the wire from moving relative to the extension tube, thereby improving the waterproof effect of the waterproof sheath. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a waterproof sheath for a terminal block in this application.

[0019] Figure 2 This is a cross-sectional view of the waterproof sheath at the extension tube in this application.

[0020] Figure 3 This is a schematic diagram of the exploded structure of the waterproof sheath at the extension pipe in this application.

[0021] Figure 4 This is a schematic diagram of the structure of the outer shell and extension tube in this application.

[0022] Figure 5 This is a half-sectional view of the waterproof sheath at the extension tube in this application.

[0023] Figure 6 This is a schematic diagram of the clamping component in this application.

[0024] The meanings of the labels in the diagram are as follows:

[0025] 10. Terminal block body; 20. Wire; 100. Housing; 101. Extension tube; 110. Rotating sleeve; 120. Cover plate; 210. Arc block; 211. Top post; 212. Top block; 220. Elastic washer ring; 230. Plug ring; 240. Expansion sleeve; 250. Sealing washer; 301. External thread part; 302. Ring groove; 303. Slot; 304. Groove; 401. Protrusion; 501. Internal thread part; 502. Guide surface; 503. Groove; 601. Raised point. Detailed Implementation

[0026] To further understand the content of this application, a detailed description of this application will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not intended to limit the scope of this application.

[0027] The following is in conjunction with the appendix Figures 1-6 This embodiment will be described in further detail.

[0028] like Figure 1 As shown, a waterproof sheath for a terminal block in this embodiment includes a housing 100, a terminal block body 10 embedded in the housing 100, and extension tubes 101 for power supply wires 20 to extend into the two ends of the housing 100. A clamping component for clamping the wires 20 is provided at the extension tubes 101.

[0029] In this embodiment, the housing 100 has a cavity with an opening on one side, and the terminal block body 10 is embedded into the cavity through the opening. The extension tube 101 is integrally formed at both ends of the housing 100 and communicates with the cavity to form a housing structure for mounting the terminal block body 10.

[0030] In actual use, the terminal block body 10 is an existing screw-type terminal block. When connecting two wires 20, the outer sheath of one end of the wire 20 is stripped to expose a section of the wire core. Then, one end of the two wires 20 is inserted into the terminal block body 10 through the corresponding extension tube 101, and the screw is turned through the opening of the chamber to press the wire 20 onto the terminal block body 10.

[0031] In this embodiment, the outer shell 100 and the extension tube 101 are made by injection molding, thereby giving the shell structure formed by the outer shell 100 and the extension tube 101 better insulation performance.

[0032] Specifically, a removable cover plate 120 is installed at the opening of the chamber by screws. The cover plate 120 is used to seal the chamber to protect the wiring terminal body 10 inside the chamber. In actual use, in order to improve the sealing effect of the cover plate 120, in this embodiment, a sealing gasket is provided on the side of the cover plate 120 to press against the side of the outer shell 100, so as to prevent external moisture from entering through the gap at the installation of the cover plate 120, thereby improving the waterproof effect of the waterproof sleeve.

[0033] It should be noted that the clamping component is used to cooperate with the outer sheath of the corresponding wire 20. By setting the clamping component, when the connection of the two wires 20 is completed between the terminal body 10, the clamping component can clamp the outer sheath of the corresponding wire 20, so that the wire 20 is fixed relative to the housing structure, thereby improving the tensile strength between the two. That is, the wire 20 is not easy to move relative to the housing structure, so as to avoid affecting the sealing and waterproofing effect of the subsequent sealing component.

[0034] In this embodiment, the clamping assembly includes a clamping member disposed inside the extension tube 101 and a rotating sleeve 110. When the rotating sleeve 110 is threaded to the outer wall of the extension tube 101, it is used to drive the clamping member to clamp the wire 20. The rotating sleeve 110 is provided with a sealing member that cooperates with the end wall of the extension tube 101 to seal the gap between the rotating sleeve 110 and the wire 20.

[0035] In this embodiment, by connecting the rotating sleeve 110 to the outer wall of the extension tube 101, the sealing member can seal the gap between the rotating sleeve 110 and the wire 20. At the same time, the clamping member can hold the outer sheath of the wire 20 to fix the wire 20 and prevent the wire 20 from moving relative to the extension tube 101, thereby improving the waterproof effect of the waterproof sheath.

[0036] Combination Figures 2-4 As shown, in this embodiment, the outer wall of the extension tube 101 is provided with an external threaded portion 301 and an annular groove 302 located inside the external threaded portion 301 along its circumference. The annular groove 302 is arranged along the circumference of the extension tube 101 and its opening faces the outer end of the extension tube 101. At the opening of the annular groove 302 and on the side wall near the external threaded portion 301, a plurality of slots 303 are evenly distributed. In this embodiment, there are 3 slots 303. The side wall of the annular groove 302 is provided with a slot 304 corresponding to the slot 303, which communicates with the extension tube 101.

[0037] The clamping component includes several arc-shaped blocks 210 that are slidably disposed in the annular groove 302. Specifically, the number of arc-shaped blocks 210 corresponds to the number of slots 303. One side of the arc-shaped block 210 is provided with a top post 211 that is inserted into the slot 303, and the other side is provided with a top block 212 that corresponds to the slot opening 304. An elastic washer ring 220 is sleeved inside the annular groove 302 to push the arc-shaped block 210 so that the top post 211 extends out of the slot 303.

[0038] Specifically, in combination Figure 5 As shown, the width of the arc-shaped block 210 is adapted to the depth of the annular groove 302, and the width of the groove 304 is smaller than the width of the annular groove 302. Therefore, a space for the installation of the elastic washer ring 220 is formed between the arc-shaped block 210, the top block 212 and the opening of the annular groove 302. The elastic washer ring 220 is made of elastic rubber and is fitted inside the annular groove 302. Its outer side wall abuts against the other side of the arc-shaped block 210, and its inner side wall abuts against the side wall of the annular groove 302 away from the external thread 301, so that the elastic washer ring 220 can be installed. Under its action, the arc-shaped block 210 fits against the side wall of the annular groove 302 near the external thread 301, so that the top post 211 extends through the slot 303.

[0039] In order to assemble the arc-shaped block 210 and the elastic washer 220 in the annular groove 302, in this embodiment, the openings of the slots 303 all face the openings of the annular groove 302. The outer side wall of the extension tube 101 is threaded with a plugging ring 230 for confining the arc-shaped block 210 and the elastic washer 220 in the annular groove 302. In actual use, the side wall of the external threaded part 301 away from the annular groove 302 extends outward to form a connecting part. The plugging ring 230 is threaded to the outer side wall of the connecting part to seal the openings of the annular groove 302 and the slots 303, thereby press-fitting the arc-shaped block 210 and the elastic washer 220 into the annular groove 302.

[0040] In this embodiment, in order to better compress and fix the outer sheath of the wire 20 by the top block 212, combined with Figure 5 As shown, the rotating sleeve 110 has an opening at one end and a through hole through which the power supply line 20 passes at the other end. The inner wall of the rotating sleeve 110 is provided with an internal thread 501 that is threaded to the external thread 301 and a guide surface 502. The guide surface 502 is arranged circumferentially along the rotating sleeve 110 and close to the opening of the rotating sleeve 110. When the rotating sleeve 110 is connected to the external thread 301 through the internal thread 501, the guide surface 502 drives the top post 211 to retract into the slot 303, thereby moving the arc block 210 away from the annular groove 302 and closer to the side wall of the external thread 301. At this time, the elastic washer ring 220 is compressed, pushing the top block 212 through the slot 304 and into the interior of the extension tube 101 to press the outer sheath of the wire 20.

[0041] To restrict the movement of the arc-shaped block 210 within the annular groove 302 and prevent it from wobbling and affecting the pressing of the top block 212 against the outer sheath of the wire 20, in this embodiment, protrusions 401 are evenly distributed on the inner wall of the annular groove 302. The protrusions 401 are distributed between the arc-shaped blocks 210, and the thickness of the protrusions 401 is the same as the width of the groove opening 304. Therefore, the protrusions 401 do not interfere with the installation of the elastic pad ring 220 within the annular groove 302. At the same time, the two end walls of the protrusions 401 can slide and engage with the end walls of the corresponding arc-shaped blocks 210, thereby restricting the arc-shaped blocks 210 so that they can only move radially within the annular groove 302. Preferably, the top block 212 penetrates the groove opening 304 to press against the outer sheath of the wire 20.

[0042] Combination Figure 6 As shown, in this embodiment, in order to better compress the outer sheath of the wire 20 by the top block 212, the end of the top block 212 that penetrates the slot 304 is arc-shaped. This arc-shaped surface can better fit the outer sheath of the wire 20. The arc-shaped surface is provided with protrusions 601. The protrusions 601 are used to increase the friction between the arc-shaped surface and the outer sheath of the wire 20, thereby improving the fixing effect between the two. Specifically, the rotating sleeve 110 and the tightening member are both made of plastic to ensure the insulation of the waterproof sheath.

[0043] In actual use, in order to ensure the waterproof effect at the connection between the rotating sleeve 110 and the extension tube 101, in this embodiment, a stepped groove is provided along the circumference of the outer wall of the extension tube 101 near the end of the outer shell 100. A sealing gasket 250 is fitted inside the stepped groove. When the rotating sleeve 110 is threaded onto the external thread 301, one end of the rotating sleeve 110 can squeeze the sealing gasket 250 to fit tightly against the side wall of the stepped groove, so that the connection between the rotating sleeve 110 and the extension tube 101 is sealed.

[0044] In this embodiment, a groove 503 is provided on the inner wall of the rotating sleeve 110 along its circumference, and one side wall of the groove 503 is connected to a through hole.

[0045] The sealing element includes an expansion sleeve 240 that is fitted over the wire 20 and located in the groove 503. When the rotating sleeve 110 is connected to the external thread 301, it drives the groove 503 to move toward the end of the extension tube 101 so that the expansion sleeve 240 is tightened.

[0046] In practical use, when the plugging ring 230 is connected to the outer wall of the connecting part to seal the openings of the ring groove 302 and the slot 303, the outer end face of the plugging ring 230 is flush with the outer end face of the connecting part so that the two form a plane that matches the side wall of the expansion sleeve 240. The groove 503 is adapted to this plane, and the expansion sleeve 240 extends out of the groove 503 in its natural state. At this time, when the rotating sleeve 110 is threaded onto the external thread 301, the groove 503 can be moved toward the plane, thereby squeezing the expansion sleeve 240 and deforming it to tighten between the groove 503 and the outer sheath of the wire 20. This seals the gap between the through hole of the rotating sleeve 110 and the outer sheath of the wire 20, thereby improving the waterproof effect.

[0047] In summary, the above description is only a preferred embodiment of this application. All equivalent changes and modifications made within the scope of this application should be covered by this application.

Claims

1. A waterproof sheath for a terminal block, comprising a housing (100), wherein a terminal block body (10) is embedded within the housing (100), and extension tubes (101) for a power supply line (20) to extend into are formed at both ends of the housing (100), characterized in that: The extension tube (101) is provided with a clamping assembly for clamping the wire (20); The clamping assembly includes a clamping member disposed in the extension tube (101) and a rotating sleeve (110). When the rotating sleeve (110) is threaded to the outer wall of the extension tube (101), it is used to drive the clamping member to clamp the wire (20). The rotating sleeve (110) is provided with a sealing member that cooperates with the end wall of the extension tube (101) to seal the gap between the rotating sleeve (110) and the wire (20).

2. The waterproof sheath for a terminal block according to claim 1, characterized in that: The outer wall of the extension tube (101) is provided with an external thread (301) along its circumference and an annular groove (302) located inside the external thread (301). A plurality of slots (303) are evenly distributed at the opening of the annular groove (302) and on the side wall near the external thread (301). The side wall of the annular groove (302) is provided with a slot (304) corresponding to the slot (303) to communicate with the extension tube (101). The clamping component includes several arc-shaped blocks (210) that are slidably disposed in the annular groove (302). One side of the arc-shaped block (210) is provided with a top post (211) that is inserted into the slot (303), and the other side is provided with a top block (212) that corresponds to the slot opening (304). An elastic washer (220) is sleeved in the annular groove (302) for pushing the arc-shaped block (210) so that the top post (211) extends out of the slot (303).

3. A waterproof sheath for a terminal block according to claim 2, characterized in that: The outer wall of the extension tube (101) is threaded with a plug ring (230) for confining the arc block (210) and the elastic washer ring (220) within the annular groove (302).

4. A waterproof sheath for a terminal block according to claim 2, characterized in that: The inner wall of the rotating sleeve (110) is provided with an internal thread (501) that is threaded to the external thread (301) and a guide surface (502). When the rotating sleeve (110) is connected to the external thread (301) through the internal thread (501), the guide surface (502) is driven to squeeze the top post (211) so that it retracts into the slot (303), thereby driving the top block (212) to pass through the slot (304) to press the wire (20).

5. A waterproof sheath for a terminal block according to claim 4, characterized in that: The inner wall of the rotating sleeve (110) is provided with a groove (503) along its circumference. The seal includes an expansion sleeve (240) that is fitted over the wire (20) and located in a groove (503). When the rotating sleeve (110) is connected to the external thread (301), it causes the groove (503) to move toward the end of the extension tube (101) so that the expansion sleeve (240) is tightened.

6. A waterproof sheath for a terminal block according to claim 2, characterized in that: The top block (212) has an arc-shaped end through the slot (304), and protrusions (601) are arranged on the arc surface.

7. A waterproof sheath for a terminal block according to claim 1, characterized in that: The outer casing (100) has a chamber with an opening on one side, and a removable cover plate (120) is provided at the opening of the chamber by screws.

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