A highly waterproof industrial plug

Abstract

The present invention relates to the technical field of industrial plugs and discloses a highly waterproof industrial plug. The present invention includes: a housing, a waterproof socket is provided at the front end of the housing, and an insert core and a wiring terminal connected to the waterproof socket are also provided inside the housing; the waterproof socket includes an inner cylinder threadedly connected to the housing, an outer cylinder that can be telescopically reset is provided on the inner cylinder, and the same rubber corrugated sleeve is sleeved on the inner cylinder and the outer cylinder, so that when the waterproof socket is inserted into the socket and tightened and contracted, the rubber corrugated sleeve is extruded. By making the socket at the front end of the plug have a telescopic characteristic and cooperating with a rubber corrugated sleeve with a compressible and expandable diameter, the plug is shrunk after being inserted into the socket and the rubber corrugated sleeve is extruded, so that the rubber corrugated sleeve is tightened against the inner wall of the socket by expansion, thereby ensuring the stability of the plug and its waterproofness with the socket.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial plugs, and particularly to a highly waterproof industrial plug. Background Art

[0002] An industrial plug is a power plug specifically designed for industrial environments, usually having a high current-carrying capacity and protection level. An industrial plug generally consists of two major parts: a housing and a plug core. The housing part is composed of components such as a bolt-on cover, a waterproof cable clamp, and a rubber ring.

[0003] Existing industrial plugs already have good waterproof performance. At the front end (insertion end) of the housing, there is an insertion barrel that can surround the plug pins. When the plug is inserted into an industrial socket, the insertion barrel will also be inserted into the industrial socket. In this case of mutual wrapping, it enables the industrial plug to have good waterproof performance. However, due to the gap caused by the difference in diameter between the insertion barrel and the socket jack, there are stability defects between the two. And the waterproof ability between the two entirely depends on the rubber ring sleeved at the step of the industrial plug to ensure (when the plug is inserted into the socket, the rubber ring will be pressed against the end face or the end of the socket jack). Once the industrial plug is affected by external forces or other reasons, resulting in incomplete pressing between the plug and the socket, causing a gap between the rubber ring and the socket or the plug, water seepage problems are likely to occur. Therefore, it is necessary to propose a highly waterproof industrial plug. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a highly waterproof industrial plug.

[0005] The present invention is realized by adopting the following technical solutions: a housing, a waterproof insertion barrel is provided at the front end of the housing, and a plug core and a wiring terminal connected to the waterproof insertion barrel are further provided inside the housing;

[0006] The waterproof insertion barrel includes an inner barrel threadedly connected to the housing. An outer barrel that can be telescopically reset is provided on the inner barrel. The same rubber corrugated sleeve is sleeved on the inner barrel and the outer barrel. In this way, when the waterproof insertion barrel is inserted into the socket jack and pressed to contract, the rubber corrugated sleeve is squeezed, and after the rubber corrugated sleeve contracts and expands, it is pressed against the inner wall of the socket jack.

[0007] As a further improvement of the above solution, both the inner barrel and the outer barrel are provided with annular grooves for limiting the rubber corrugated sleeve. Rubber stirrups are provided at both ends of the rubber corrugated sleeve, and the two rubber stirrups are respectively embedded in the two annular grooves. The rubber stirrups cooperating with the annular grooves can ensure the sealing performance between the rubber corrugated sleeve and the inner barrel and the outer barrel.

[0008] As a further improvement of the above solution, a convex ring for pressing the rubber stirrup at the bottom end of the rubber corrugated sleeve is provided at the bottom end of the outer barrel, so as to ensure the sealing performance at the bottom end of the rubber corrugated sleeve.

[0009] As a further improvement of the above solution, a reverse pushing mechanism is further provided inside the inner cylinder. The reverse pushing mechanism includes a plurality of positioning columns slidably arranged inside the inner cylinder and fixedly connected to the bottom end of the outer cylinder. A first spring for reverse pushing the positioning columns is slidably sleeved on each of the plurality of positioning columns, so as to realize the telescopic reset of the outer cylinder.

[0010] As a further improvement of the above solution, hoop grooves are provided on each of the plurality of positioning columns. A plurality of beads adapted to the hoop grooves are slidably arranged inside the outer shell. An abutting ring for pushing against the beads and a second spring for providing a reverse thrust to the abutting ring are slidably sleeved on the core. When the outer cylinder contracts, the hoop grooves on the positioning columns are driven to be aligned with the beads, so that the beads are snapped into the hoop grooves to limit the abutting ring, thereby offsetting the thrust applied by the first spring to the outer cylinder.

[0011] As a further improvement of the above solution, the wiring terminal is fixedly connected to the waterproof socket cylinder. The core is slidably mounted on the wiring terminal and telescopically connected to the waterproof socket cylinder. The telescopic characteristic of the core enables the pulling force of the socket to drive the abutting ring to reset when the core is pulled out from the socket, so that the beads can smoothly withdraw from the hoop grooves, ensuring that the rubber corrugated sleeve rebounds and resets with the outer cylinder, and releasing the sealed abutment between the waterproof socket cylinder and the socket socket.

[0012] As a further improvement of the above solution, a plurality of circumferentially distributed limiting grooves are provided on the core. Limiting blocks extending into the limiting grooves are provided on the inner wall of the abutting ring, so as to limit the sliding range of the abutting ring on the core, enabling the core to drive the abutting ring to rise and reset when pulled out from the socket.

[0013] As a further improvement of the above solution, a plurality of circumferentially distributed protection blocks are provided on the inner cylinder. The plurality of protection blocks all penetrate the outer cylinder and are slidably connected to the outer cylinder. The outer spacing between two protection blocks in the opposite positions is greater than the diameter of the outer cylinder, so that when the waterproof socket cylinder is inserted, the outer cylinder will not contract due to friction with the inner wall of the socket socket, resulting in premature expansion of the rubber corrugated sleeve.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] By providing a telescopic and resetable outer cylinder on the socket cylinder of the industrial plug, and sleeving a telescopic and expandable rubber corrugated sleeve on the outer cylinder and the inner cylinder of the socket cylinder, when the plug is inserted into the socket socket, the outer cylinder will contract after being tightly abutted and squeeze the rubber corrugated sleeve, so that the rubber corrugated sleeve expands after being squeezed and closely fits with the inner wall of the socket socket, thereby ensuring both the waterproofness and the tightness between the plug and the socket, and making it more difficult for the two to become loose due to gaps.

[0016] The reverse thrust mechanism of the outer cylinder is composed of a positioning column and a first spring. A hoop groove is arranged on the positioning column, a clamping bead that can cooperate with the hoop groove is arranged on the outer shell, and a retaining ring and a second spring that can control the clamping bead are arranged on the plug core. In this way, after the outer cylinder squeezes the rubber corrugated sleeve to achieve the tight contact between the plug and the socket, the reverse thrust mechanism of the outer cylinder can be limited, so that after the plug is inserted into the socket, the first spring will not apply a reverse thrust to the plug to cause the plug to loosen;

[0017] By splitting the existing ferrule structure into two parts, the ferrule and the terminal, and allowing the ferrule and the terminal to maintain a sliding connection while achieving a certain degree of expansion and contraction, the ferrule can drive the retaining ring to reset, allowing the card bead to withdraw from the hoop groove to release the tight restriction between the plug and the socket. At the same time, the conductive connection between the ferrule and the terminal is guaranteed, avoiding the connection line being directly connected to the ferrule and expanding and contracting synchronously with the ferrule, affecting the connection stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram showing the overall display of the highly waterproof industrial plug of the present invention;

[0019] Figure 2 A cross-sectional view of a highly waterproof industrial plug of the present invention;

[0020] Figure 3 This is a planar cross-sectional view of the highly waterproof industrial plug of the present invention;

[0021] Figure 4 for Figure 3 An enlarged view of part A in the middle;

[0022] Figure 5 It is a planar cross-sectional view of the waterproof insert;

[0023] Figure 6 This is a disassembled display diagram of the highly waterproof industrial plug of the present invention;

[0024] Figure 7 This is a disassembled display diagram of the waterproof plug-in sleeve, plug-in core and wiring terminal;

[0025] Figure 8 It is a partial cross-sectional view showing the waterproof plug-in sleeve, plug-in core and wiring terminal;

[0026] Figure 9 This is a disassembled display diagram of the outer tube and the inner tube in the waterproof insert;

[0027] Figure 10 This is a disassembly diagram of the outer cylinder and the rubber bellows sleeve;

[0028] Figure 11 This is a top view of the outer tube and the inner tube;

[0029] Figure 12 Partial sectional view of the outer shell

[0030] Figure 13 Exploded view of the insert core and the terminal

[0031] Main symbol description:

[0032] 1. Outer shell; 101. Bolt cap; 102. Waterproof wire clamp; 103. Limiting step; 2. Waterproof socket; 201. Inner cylinder; 2011. Protection block; 202. Outer cylinder; 2021. Convex ring; 203. Rubber corrugated sleeve; 2031. Rubber stirrup; 204. Positioning post; 205. First spring; 206. Stirrup groove; 207. Ball catch; 208. Counter ring; 209. Second spring; 3. Insert core; 301. Insulating sleeve; 302. Plug pin; 4. Terminal; 401. Insulating frustum; 402. Screw rod; 403. Terminal; 404. Guide post Specific implementation mode

[0033] Next, in combination with the drawings and specific implementation modes, the present invention will be further described

[0034] Please refer to Figures 1 to 13 , a high waterproof industrial plug, comprising: an outer shell 1, a bolt cap 101 is also threadedly arranged at the bottom of the outer shell 1, a waterproof wire clamp 102 is arranged inside the bolt cap 101, a waterproof socket 2 is arranged at the front end of the outer shell 1, and an insert core 3 and a terminal 4 connected to the waterproof socket 2 are also arranged inside the outer shell 1

[0035] The waterproof socket 2 includes an inner cylinder 201 threadedly connected to the outer shell 1, an outer cylinder 202 that can be telescopically reset is arranged on the inner cylinder 201, a reverse pushing mechanism is also arranged inside the inner cylinder 201, the reverse pushing mechanism includes a plurality of positioning posts 204 slidably arranged inside the inner cylinder 201, a plurality of L-shaped connecting feet are arranged at the bottom end of the outer cylinder 202, and the plurality of L-shaped connecting feet are all fixedly connected to the plurality of positioning posts 204 by screws, a first spring 205 is slidably sleeved on each of the plurality of positioning posts 204, a limiting step 103 is arranged on the inner wall of the outer shell 1, and two ends of the first spring 205 are respectively abutted against the limiting ring on the positioning post 204 and the limiting step 103, so as to realize the telescopic reset of the outer cylinder 202, and a groove is arranged on the limiting step 103, a plurality of through holes corresponding to the positioning posts 20 are arranged inside the groove, and the cooperation of the groove and the through holes enables the limiting step 103 to support the first spring 205 and at the same time does not affect the telescopic movement of the positioning post 204 and the disassembly and assembly of the outer shell 1 and the waterproof socket 2

[0036] A rubber corrugated sleeve 203 is sleeved on the inner cylinder 201 and the outer cylinder 202. In this way, when the waterproof plug cylinder 2 is inserted into the socket jack and tightened and contracted, the rubber corrugated sleeve 203 is squeezed. After the rubber corrugated sleeve 203 contracts and expands, it abuts against the inner wall of the socket jack. In order to improve the sealing performance of the plug, the anti-fooling device originally arranged at the position of the outer cylinder 202 is removed, and a new anti-fooling ring is arranged on the inner cylinder 201. At the same time, this plug is more suitable for sockets without anti-fooling grooves.

[0037] Through the above technical solution, when the plug is inserted into the socket jack, after the outer cylinder 202 is tightened, it will contract and squeeze the rubber corrugated sleeve 203, so that the rubber corrugated sleeve 203 expands after being squeezed and closely fits with the inner wall of the socket jack. In this way, both the waterproof performance between the plug and the socket and the tightness between the two are ensured, making it more difficult for the two to become loose due to the gap.

[0038] Please combine Figure 6 , snap rings grooves for limiting the rubber corrugated sleeve 203 are arranged on both the inner cylinder 201 and the outer cylinder 202. Rubber stirrups 2031 are arranged at both ends of the rubber corrugated sleeve 203. The two rubber stirrups 2031 are respectively embedded in the two snap rings grooves. The cooperation between the rubber stirrups 2031 and the snap rings grooves can ensure the sealing performance between the rubber corrugated sleeve 203 and the inner cylinder 201 and the outer cylinder 202. A convex ring 2021 for abutting against the rubber stirrup 2031 at the bottom end of the rubber corrugated sleeve 203 is arranged at the bottom end of the outer cylinder 202. When the outer cylinder 202 is tightened and contracted, it will abut against the rubber stirrup 2031 at the bottom end through the convex ring 2021 to ensure the sealing performance at the bottom end of the rubber corrugated sleeve 203.

[0039] Please combine Figures 2 to 6 , hoop grooves 206 are arranged on multiple positioning posts 204. Multiple beads 207 adapted to the hoop grooves 206 are slidably arranged in the housing 1. A counter ring 208 for pushing against the beads 207 and a second spring 209 for providing a reaction force to the counter ring 208 are slidably sleeved on the core 3. In this way, when the outer cylinder 202 contracts, it drives the hoop grooves 206 on the positioning posts 204 to align with the beads 207, so that the beads 207 are stuck into the hoop grooves 206 to limit the counter ring 208, thereby offsetting the thrust applied to the outer cylinder 202 by the first spring 205. Multiple circumferentially distributed limiting grooves are arranged on the core 3. Limiting blocks extending into the limiting grooves are arranged on the inner wall of the counter ring 208 to limit the sliding range of the counter ring 208 on the core 3, so that the counter ring 208 can be driven to rise and reset when the core 3 is pulled out from the socket.

[0040] Through the above technical solution, after the outer cylinder 202 squeezes the rubber corrugated sleeve 203 to achieve the tight connection between the plug and the socket jack, the reverse pushing mechanism of the outer cylinder 202 can also be limited, so that after the plug is inserted into the socket, the first spring 205 will not apply a reverse thrust to the plug to cause the plug to become loose.

[0041] Please refer to Figure 13 , the wiring terminal 4 is fixedly connected to the waterproof socket cylinder 2, and the plug core 3 is slidably installed on the wiring terminal 4 and telescopically connected to the waterproof socket cylinder 2;

[0042] The wiring terminal 4 is composed of an insulating frustum 401, a plurality of screw rods 402 rotatably arranged on the insulating frustum 401, a terminal 403 fixedly installed on the insulating frustum 401, and a guide post 404. The guide post 404 is fixedly connected to the terminal 403. A plurality of screw rods 402 are all threadedly connected to the inner cylinder 201. The plug core 3 is composed of an insulating sleeve 301 slidably sleeved on a plurality of screw rods 402 and a plug pin 302 fixedly arranged on the insulating sleeve 301. A slot is arranged at the bottom end of the plug pin 302. The guide post 404 extends into the slot and is slidably connected to the slot. The telescopic property of the plug core 3 enables it to drive the abutting ring 208 to reset when it is pulled out from the socket, allowing the detent ball 207 to smoothly exit from the hoop groove 206, ensuring that the rubber corrugated sleeve 203 rebounds and resets with the outer cylinder 202, and releasing the sealed tight connection between the waterproof socket cylinder 2 and the socket jack.

[0043] Please refer to Figures 7 to 11 , a plurality of protective blocks 2011 are arranged on the inner cylinder 201 in an annular distribution. A plurality of protective blocks 2011 all penetrate through the outer cylinder 202 and are slidably connected to the outer cylinder 202. The outer spacing between two protective blocks 2011 in an opposing position is greater than the diameter of the outer cylinder 202. In this way, when the waterproof socket cylinder 2 is inserted, the outer cylinder 202 will not contract due to friction with the inner wall of the socket jack, resulting in premature expansion of the rubber corrugated sleeve 203.

[0044] The implementation principle of a highly waterproof industrial plug in the embodiment of the present application is as follows:

[0045] During wiring, the connecting wire is passed through the bolt screw cap 101, the waterproof wire clamp 102, and the housing 1, and then the connecting wire is connected to the terminal 403 on the wiring terminal 4, and finally the waterproof socket cylinder 2 is tightened with the housing 1;

[0046] During use, insert the waterproof socket cylinder 2 into the socket jack. At this time, when the plug pin 302 on the plug core 3 enters the jack on the socket, it will contract backward, and during the contraction process, it will squeeze the second spring 209. The second spring 209 then pushes the abutting ring 208 to squeeze the detent ball 207. When the plug is fully inserted, after the outer cylinder 202 on the waterproof socket cylinder 2 abuts against the end wall of the socket jack, it will contract backward and drive the rubber corrugated sleeve 203 to contract, causing the rubber corrugated sleeve 203 to expand and abut tightly against the inner wall of the socket jack to achieve sealing;

[0047] Meanwhile, the outer cylinder 202 will also synchronously drive multiple positioning posts 204 to descend (when the positioning posts 204 descend, they will squeeze the first spring 205) until the hoop groove 206 on the positioning posts 204 is at the same height as the detent ball 207. At this time, the detent ball 207 pushed by the abutting ring 208 will then be inserted into the hoop groove 206, and the abutting ring 208 will smoothly descend to one side of the detent ball 207 to limit the detent ball 207, so that the detent ball 207 will not withdraw from the hoop groove 206, thereby limiting the reverse pushing mechanism of the outer cylinder 202. After the plug is inserted into the socket, the first spring 205 will not apply a reverse thrust to the plug to cause the plug to become loose;

[0048] When the plug is pulled out, the plug core 3 will be reset by the pulling of the socket jack and drive the abutting ring 208 to reset. At this time, the detent ball 207 will lose the restriction of the abutting ring 208 and withdraw from the hoop groove 206. When the plug is pulled out, after enough space is separated between the waterproof socket cylinder 2 and the end wall of the socket jack, the first spring 205 will push the outer cylinder 202 through the positioning posts 204, causing the outer cylinder 202 to lift the rubber corrugated sleeve 203, thereby releasing the tight seal between the plug and the socket jack and allowing the plug to be pulled out more smoothly.

[0049] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A highly waterproof industrial plug, comprising a housing (1), a waterproof socket cylinder (2) is provided at the front end of the housing (1), and a plug core (3) and a wiring terminal (4) connected to the waterproof socket cylinder (2) are further provided inside the housing (1), characterized in that: The waterproof socket cylinder (2) comprises an inner cylinder (201) threadedly connected to the housing (1), a telescopic and resetable outer cylinder (202) is provided on the inner cylinder (201), and the same rubber corrugated sleeve (203) is sleeved on the inner cylinder (201) and the outer cylinder (202); In this way, when the waterproof socket cylinder (2) is inserted into the socket and tightened and contracted, the rubber corrugated sleeve (203) is extruded, and after the rubber corrugated sleeve (203) contracts and expands, it is tightened against the inner wall of the socket; A plurality of positioning posts (204) are provided inside the inner cylinder (201), hoop grooves (206) are provided on the plurality of positioning posts (204), a plurality of beads (207) adapted to the hoop grooves (206) are slidably arranged inside the housing (1), and a resisting ring (208) for pushing against the beads (207) and a second spring (209) for providing a reaction force to the resisting ring (208) are slidably sleeved on the plug core (3); In this way, when the outer cylinder (202) contracts, the hoop grooves (206) on the positioning posts (204) are aligned with the beads (207), so that the beads (207) are snapped into the hoop grooves (206) to limit the resisting ring (208), thereby offsetting the thrust applied by the first spring (205) to the outer cylinder (202).

2. The highly waterproof industrial plug according to claim 1, wherein Both the inner cylinder (201) and the outer cylinder (202) are provided with retaining ring grooves for limiting the rubber corrugated sleeve (203), both ends of the rubber corrugated sleeve (203) are provided with rubber retaining rings (2031), and the two rubber retaining rings (2031) are respectively embedded in the two retaining ring grooves. The rubber retaining rings (2031) and the retaining ring grooves can ensure the sealing performance between the rubber corrugated sleeve (203) and the inner cylinder (201) and the outer cylinder (202).

3. The high waterproof industrial plug according to claim 2, characterized in that, A convex ring (2021) for tightly pressing the rubber retaining ring (2031) at the bottom end of the rubber corrugated sleeve (203) is provided at the bottom end of the outer cylinder (202), so as to ensure the sealing performance at the bottom end of the rubber corrugated sleeve (203).

4. The high waterproof industrial plug according to claim 1, characterized in that An anti-pushing mechanism is further provided inside the inner cylinder (201), the anti-pushing mechanism comprises a plurality of positioning posts (204) slidably arranged inside the inner cylinder (201) and fixedly connected to the bottom end of the outer cylinder (202), and a first spring (205) for anti-pushing the positioning posts (204) is slidably sleeved on the plurality of positioning posts (204), so as to realize the telescopic reset of the outer cylinder (202).

5. The high waterproof industrial plug according to claim 1, characterized in that, The wiring terminal (4) is fixedly connected to the waterproof socket cylinder (2), and the plug core (3) is slidably installed on the wiring terminal (4) and is telescopically connected to the waterproof socket cylinder (2); The retractable characteristic of the ferrule (3) enables the pulling force of the socket to drive the abutting ring (208) to reset when the ferrule is pulled out of the socket, allowing the detent ball (207) to smoothly exit from the ferrule groove (206), ensuring that the rubber corrugated sleeve (203) rebounds and resets with the outer cylinder (202), and releasing the sealed abutment between the waterproof plug cylinder (2) and the socket jack.

6. The high waterproof industrial plug according to claim 5, characterized in that, A plurality of circumferentially distributed limiting grooves are provided on the ferrule (3), and limiting blocks extending into the limiting grooves are provided on the inner wall of the abutting ring (208), thereby limiting the sliding range of the abutting ring (208) on the ferrule (3), so that the ferrule (3) can drive the abutting ring (208) to rise and reset when pulled out of the socket.

7. The high waterproof industrial plug according to claim 1, characterized in that, A plurality of circumferentially distributed protection blocks (2011) are provided on the inner cylinder (201), and the plurality of protection blocks (2011) all penetrate the outer cylinder (202) and are slidably connected to the outer cylinder (202). The outer spacing between two protection blocks (2011) in the opposite positions is greater than the diameter of the outer cylinder (202); Thereby, when the waterproof plug cylinder (2) is inserted, the outer cylinder (202) will not contract due to friction with the inner wall of the socket jack, resulting in premature expansion of the rubber corrugated sleeve (203).

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