Watertight high-current connector

Abstract

The invention belongs to the technical field of connectors, and particularly relates to a watertight large-current connector, which comprises a plug and a socket which are in pluggable connection, and is characterized in that the plug comprises a plug shell, a plug insulator assembled in the plug shell and a jack contact assembled in the plug insulator; the outer wall of the head end of the plug shell is provided with at least one guide key, the outside of the plug shell is rotatably matched with a nut, the head end of the jack contact element is provided with a middle hole, and a cap spring is assembled in the middle hole; the socket comprises a socket shell, a socket insulator assembled in the socket shell, and a pin contact assembled in the socket insulator. According to the technical scheme, the watertight large-current connector is suitable for large-current transmission in a deepwater environment, the jack contact piece and the pin contact piece form a current transmission channel, the head end of the pin contact piece is wrapped by the cap spring, and stable surface-to-surface contact is realized between the jack contact piece and the pin contact piece, so that the connector has large-current transmission capability.

Description

Technical Field

[0001] The invention belongs to the technical field of connectors, and in particular relates to a watertight high-current connector. Background Art

[0002] Watertight connectors are connectors designed to prevent moisture from entering electrical connection components and are widely used in the automotive industry, marine and offshore equipment, industrial equipment, exterior lighting, aerospace and other fields.

[0003] Existing watertight electrical connectors suitable for deep-water environments generally transmit low-frequency signals, have relatively low current transmission capabilities, and their current carrying capacity is insufficient to meet requirements.

[0004] In view of the above problems, a watertight high current connector is designed. Summary of the invention

[0005] The present invention aims at solving the problems in the prior art and proposes the following technical solutions:

[0006] Watertight high current connectors, including pluggable plugs and sockets,

[0007] The plug comprises a plug housing, a plug insulator mounted inside the plug housing, and a socket contact mounted inside the plug insulator, at least one guide key is arranged on the outer wall of the head end of the plug housing, a nut is rotatably fitted on the outside of the plug housing, a middle hole is opened at the head end of the socket contact, and a crown spring is mounted in the middle hole;

[0008] The socket comprises a socket housing, a socket insulator assembled inside the socket housing, and a pin contact assembled inside the socket insulator. The head end of the socket housing is axially extended to form a cavity inside the head end. The inner wall of the cavity is provided with guide key slots having the same number as the guide keys. The guide keys are slidably matched with the guide key slots. The head end of the socket housing is provided with a threaded section outside.

[0009] The head end of the plug housing is inserted into the cavity, and the nut and the threaded section rotate in cooperation to drive the socket housing to move closer to or away from the socket housing, wherein when the socket contact contacts the pin contact, the head end of the pin contact is covered by the crown spring.

[0010] As a preferred embodiment of the above technical solution, at least one annular groove A- is formed on the outer wall of the head end of the plug housing, an O-ring is installed in the annular groove A-, and the O-ring is squeezed and deformed with the inner wall of the cavity.

[0011] As a preferred embodiment of the above technical solution, a ring groove B3 is provided on the outer wall of the socket housing, and an O-ring is installed in the ring groove B3;

[0012] The outer wall of the socket housing is provided with a mounting panel, and a side wall of the mounting panel opposite to the ring groove B3 is provided with a ring groove B4, in which an O-ring B1 is installed.

[0013] As a preferred embodiment of the above technical solution, an annular groove B- is formed on the inner wall of the rear end of the socket housing, and a sealing glue is poured between the annular groove B- and the pin contact piece.

[0014] As a preferred embodiment of the above technical solution, the tail end of the plug housing is threadedly equipped with a tail attachment, and a sealing ring is provided between the plug housing and the tail attachment;

[0015] The socket also includes a screw, a spring washer and a wire crimping terminal. A threaded hole is provided at the tail end of the pin contact piece. The screw penetrates the spring washer and the wire crimping terminal and then is threadedly matched with the threaded hole.

[0016] As a preferred embodiment of the above technical solution, the inner wall of the cavity is provided with an annular groove B5, a corrugated spring is installed inside the annular groove B5, and the corrugated spring is sleeved on the head end of the socket housing;

[0017] When the plug and the socket are plugged in, the corrugated spring is squeezed and deformed by the head end of the plug housing.

[0018] As a preferred embodiment of the above technical solution, a second annular groove A is formed on the outer wall of the plug housing, and a second retaining spring is installed inside the second annular groove A; the outer wall of the plug housing extends radially outward to form a limiting portion 1, and the limiting portion 1 is located between the first annular groove A and the second annular groove A;

[0019] The tail end of the nut extends radially inward to form a second limiting portion, and the limiting portion is located between the first limiting portion and the second retaining spring.

[0020] As a preferred embodiment of the above technical solution, an annular groove A3 is provided on the inner wall of the plug housing, a retaining spring A1 is installed in the annular groove A3, the inner wall of the plug housing extends radially inward to form a single key A, and a single key groove A is provided at the head end of the plug insulator, and the single key A matches the single key groove A;

[0021] A second annular groove B is provided on the inner wall of the socket housing, a retaining spring B is installed in the second annular groove B, a single key groove B is provided on the inner wall of the socket housing, the middle part of the socket insulator extends radially outward to form a stopper, the stopper extends axially to form a single key B, and the single key groove B matches the single key B.

[0022] As a preferred embodiment of the above technical solution, a plurality of holes A are provided in the plug insulator, and the inside of the hole A extends radially inward to form a limit step A1; the jack contact piece extends radially outward to form a limit step A2, and a retaining ring A and an elastic retaining ring A are sleeved at the installation groove provided on the jack contact piece, one end of the elastic retaining ring A is covered by the retaining ring A, and the elastic retaining ring A and the limit step A2 clamp the limit step A1;

[0023] A plurality of holes B extending transversely therethrough are provided in the socket insulator, and the inner wall of the hole B extends radially inward to form a limiting step B1; a limiting step B2 is extended radially outward on the pin contact piece, and a retaining ring B and an elastic retaining ring B are sleeved on the mounting groove provided on the pin contact piece, one end of the elastic retaining ring B is covered by the retaining ring B, and the elastic retaining ring B and the limiting step B2 clamp the limiting step B1.

[0024] As a preferred embodiment of the above technical solution, an insulating sleeve is provided at the head of the pin contact.

[0025] The beneficial effects of the present invention are:

[0026] The watertight high-current connector in this technical solution is suitable for high-current transmission in deep water environments:

[0027] 1. The socket contact and the pin contact form a current transmission channel. The head end of the pin contact is covered by a crown and strap spring. The rated current of the crown and strap spring can reach 200A, which enables the connector to have a large current transmission capability. Among them, the socket contact and the pin contact achieve stable surface-to-surface contact, that is, multi-point contact, which reduces the heat generation during the current transmission process and ensures the high current transmission of the connector.

[0028] 2. Assemble the contact piece inside the insulator, insulate the contact piece, and use the shell to protect the insulator, so that the connector has higher insulation and avoids the situation where the insulator is damaged by the high pressure in the deep water environment, thereby ensuring the stable transmission of large current in the deep water environment.

[0029] 3. Through the settings of self-sealing of the plug, self-sealing of the socket, sealing between the mating surfaces of the plug and the socket, and sealing between the socket and external equipment, the connector has a higher sealing performance; the possibility of deep water pressure affecting the sealing performance is reduced, thereby ensuring the stable transmission of large current in deep water environment.

[0030] 4. The relative position between the plug housing and the socket housing is fixed by the threaded cooperation of the nut and the threaded segment, thereby ensuring the reliability of the connector connection; the contact has high stability when it is located inside the insulator, and the insulator has high stability when it is located inside the shell, so that the internal assembly of the connector components has high stability; the watertight high-current connector in the technical solution has high water pressure resistance, which is suitable for the requirements of high pressure on connector stability in deep water environment, reduces the possibility of deep water pressure affecting the connector, and ensures the stable transmission of large current. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The structure diagram of the watertight high current connector in Example 1 is shown;

[0032] Figure 2 The figure shows the internal structure of the watertight high current connector in Example 1;

[0033] Figure 3 It is shown that Figure 1 Exploded diagram of the middle plug;

[0034] Figure 4 It is shown that Figure 3 A schematic diagram of the structure of the plug housing;

[0035] Figure a is a schematic diagram of the structure of the plug housing from a first viewing angle; Figure b is a schematic diagram of the structure of the plug housing from a second viewing angle;

[0036] Figure 5 It is shown that Figure 3 A schematic diagram of the structure of the middle plug insulator;

[0037] Figure 6 It is shown that Figure 3 A schematic diagram of the structure of the middle jack contact;

[0038] Figure 7 It is shown that Figure 1 A schematic diagram of the structure of the middle socket;

[0039] Figure 8 It is shown that Figure 7 A schematic diagram of the structure of the middle socket housing;

[0040] Fig. 9 It is shown that Figure 7 A schematic diagram of the structure of the middle socket insulator;

[0041] Fig.10 It is shown that Figure 7 A schematic diagram of the structure of the middle pin contact;

[0042] Fig.11The diagram shows the plug and socket in the embodiment 1.

[0043] Fig.12 It is shown that Fig.11 A schematic diagram of the enlarged structure in the middle;

[0044] Fig.13 The diagram shows the internal structure of the watertight high current connector during the removal operation in Example 1;

[0045] Fig.14 It is shown that Fig.13 A magnified schematic diagram of structure B in the middle.

[0046] Reference numerals: plug 10; O-ring A11; plug housing 12; guide key 121; ring groove A122; ring groove A2123; ring groove A3124; single key A125; limiter 126; plug insulator 13; hole A131; limiter step A1311; single key groove A132; retaining spring A14; socket contact 15; middle hole 151; crown spring 152; retaining ring A153; elastic retaining ring A154; limiter step A2155; nut 16; retaining spring A217; tail attachment 18;

[0047] Socket 20; corrugated spring 21; socket housing 22; mounting panel 221; guide keyway 222; single keyway B223; ring groove B1 224; ring groove B2 225; ring groove B3 226; ring groove B4 227; ring groove B5 228; threaded section 229; socket insulator 23; hole B231; limiting step B1 2311; single key B232; retaining ring B24; O-ring B1 25; O-ring B2 26; pin contact 27; retaining ring B271; elastic retaining ring B272; limiting step B2 273; threaded hole 274; insulating sleeve 275; screw 28; spring washer 29; crimping terminal 210. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0049] Example 1

[0050] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 , Fig.11 , Fig.12As shown, a watertight high-current connector comprises a plug 10 and a socket 20 that can be plugged and connected. The plug 10 comprises a plug housing 12, a plug insulator 13 assembled inside the plug housing 12, and a socket contact 15 assembled inside the plug insulator 13. The outer wall of the head end of the plug housing 12 is provided with at least one guide key 121. When the guide keys 121 are provided in multiple numbers, the distances between two adjacent guide keys 121 are different. In this embodiment, five guide keys 121 are provided. The outer part of the plug housing 12 is rotatably matched with a nut 16. The head end of the socket contact 15 is provided with a middle hole 151. A crown spring 152 is assembled in the middle hole 151. The rated current of the crown spring 152 can reach 200A.

[0051] The socket 20 includes a socket housing 22, a socket insulator 23 assembled inside the socket housing 22, and a pin contact 27 assembled inside the socket insulator 23. The head end of the socket housing 22 extends axially to form a cavity inside thereof. The inner wall of the cavity is provided with guide key slots 222 having the same number as the guide keys 121. The guide keys 121 are slidably matched with the guide key slots 222. A threaded section 229 is arranged outside the head end of the socket housing 22.

[0052] The head end of the plug housing 12 is inserted into the interior of the cavity, and the nut 16 and the threaded section 229 rotate in cooperation to drive the socket housing 22 to move closer to or away from the socket housing 22, wherein when the socket contact 15 contacts the pin contact 27, the head end of the pin contact 27 is covered by the crown spring 152.

[0053] The watertight high-current connector in the present technical solution, when the plug 10 and the socket 20 are plugged in and mated, first the head end of the plug housing 12 is inserted into the interior of the cavity until the nut 16 is mated with the threaded section 229, and then the nut 16 is rotated on the threaded section 229 to drive the socket housing 22 to move axially until the socket contact 15 contacts the pin contact 27, and the head end of the pin contact 27 is covered by the crown spring 152, and the socket contact 15 and the pin contact 27 form a current transmission channel.

[0054] The watertight high-current connector in this technical solution is suitable for high-current transmission in deep water environments (500-1000 meters water depth). 1. The head end of the pin contact 27 is covered by the crown spring 152, and the rated current of the crown spring 152 can reach 200A, so that the connector has high current transmission capability, and the socket contact 15 and the pin contact 27 achieve stable surface-to-surface contact, that is, multi-point contact, which reduces the heat generation during current transmission and ensures the high current transmission of the connector.

[0055] 2. The jack contact 15 is assembled inside the plug insulator 13, the plug insulator 13 is assembled inside the plug shell 12, the pin contact 27 is assembled inside the socket insulator 23, and the socket insulator 23 is assembled inside the socket shell 22. The contacts are insulated and the shell is used to protect the insulator, so that the connector has higher insulation and avoids damage to the insulator caused by high pressure in the deep sea environment, thereby ensuring stable transmission of large current.

[0056] 3. The plug housing 12 and the socket housing 22 are fixed in relative position by means of threaded engagement between the nut 16 and the threaded section 229, thereby ensuring the reliability of the connector connection, adapting to the deep water and high pressure environment, and ensuring the stable transmission of large currents;

[0057] At the same time, the nut 16 and the threaded section 229 are threadedly rotated to drive the socket housing 22 to move closer to or away from the socket housing 22, thereby avoiding the problem of axial movement during plug-in mating.

[0058] 4. The guide key 121 and the guide key slot 222 are arranged to slide together, which has a guiding function when the plug 10 and the socket 20 are initially plugged in, and at the same time locates the plugging position in the circumferential direction to avoid wrong plugging;

[0059] When the nut 16 and the threaded section 229 are threadedly rotated, the relative positions of the plug housing 12 and the socket housing 22 are limited to avoid circumferential rotation, and the housing is stressed instead of the contact, thereby ensuring the high current transmission capability of the contact.

[0060] To further ensure the high current transmission capability of the watertight high current connector, the specific configuration is as follows: between the plug 10 and the socket 20, as shown in FIG. Figure 2 , Figure 3 , Figure 4 As shown, at least one annular groove A-122 is provided on the outer wall of the head end of the plug housing 12. In the present embodiment, two annular grooves A-122 are provided, and an O-ring 11 is assembled in the annular groove A-122. When the plug 10 is plugged into the socket 20, the plug housing 12 is inserted into the cavity, and the O-ring 11 is squeezed and deformed with the inner wall of the cavity to fill the gap between the plug housing 12 and the cavity, thereby ensuring the sealing between the mating surfaces of the plug 10 and the socket 20.

[0061] Between the socket 20 and the equipment panel, such as Figure 2 , Figure 7 , Figure 8As shown, a ring groove B3 226 is provided on the outer wall of the socket housing 22, and an O-ring 26 is assembled in the ring groove B3 226; a mounting panel 221 is provided on the outer wall of the socket housing 22, and a ring groove B4 227 is provided on the side wall of the mounting panel 221 opposite to the ring groove B3 226, and an O-ring B-25 is assembled in the ring groove B4 227.

[0062] When the socket 20 is interconnected with the device panel, it is connected to the device panel by bolts penetrating the mounting holes on the mounting panel 221. At this time, the O-ring B-25 and the O-ring 26 are squeezed and deformed by the device panel to fill the gap between the socket housing 22 and the device panel, thereby ensuring the sealing between the socket 20 and the device panel.

[0063] Inside the socket 20, as shown Figure 8 , Fig.11 As shown, a ring groove B-224 is formed on the inner wall of the rear end of the socket housing 22, and glue is poured between the ring groove B-224 and the pin contact 27.

[0064] The gap between the pin contact 27 and the socket housing 22 is filled with potting glue to achieve the self-sealing function of the socket 20. At the same time, the setting of the annular groove B-224 improves the strength of the potting glue at the tail of the socket.

[0065] Inside the plug 10, as Figure 1 , Figure 2 , Figure 3 As shown, the tail end of the plug housing 12 is threadedly assembled with a tail attachment 18, and a sealing ring is arranged between the plug housing 12 and the tail attachment 18; when the plug housing 12 and the tail attachment 18 are assembled, the sealing ring is squeezed and deformed to fill the gap between the plug housing 12 and the tail attachment 18, thereby realizing the self-sealing function of the plug 10.

[0066] like Figure 1 , Figure 2 , Figure 7 As shown, the socket 20 also includes a screw 28, a spring washer 29 and a crimping terminal 210. A threaded hole 274 is provided at the tail end of the pin contact 27. The screw 28 passes through the spring washer 29 and the crimping terminal 210 and then threads together with the threaded hole 274.

[0067] The O-ring A11, the plug housing 12, the plug insulator 13, the retaining spring A1 14, the socket contact 15, the nut 16, the retaining spring A2 17 and the tail 18 constitute a complete plug 10;

[0068] The corrugated spring 21, the socket housing 22, the socket insulator 23, the retaining spring B24, the O-ring B1 25, the O-ring B2 26, the pin contact 27, the screw 28, the spring washer 29 and the crimping terminal 210 constitute a complete socket 20, and the plug 10 and the socket 20 are plugged together to form a complete watertight high-current connector.

[0069] The watertight high-current connector in the present technical solution has high sealing performance through the self-sealing of the plug 10, the self-sealing of the socket 20, the sealing between the mating surfaces of the plug 10 and the socket 20, and the sealing between the socket 20 and the external device. The connector is suitable for the high pressure sealing requirements in deep water environment, reduces the possibility of the deep water pressure affecting the sealing, and thus ensures the stable transmission of large current.

[0070] To further ensure the reliability of the connector connection, such as Figure 2 , Figure 8 , Fig.11 , Fig.12 As shown, the inner wall of the cavity is provided with an annular groove B5228, and a corrugated spring 21 is assembled inside the annular groove B5228. The corrugated spring 21 is sleeved on the head end of the socket housing 22; when the plug 10 and the socket 20 are plugged in, the corrugated spring 21 is squeezed and deformed by the head end of the plug housing 12.

[0071] After the plug 10 and the socket 20 are plugged into each other, the corrugated spring 21 inside the socket 20 is squeezed by the plug housing 12, and the elastic force provided by the corrugated spring 21 is obtained between the plug 10 and the socket 20. Under this action, the thread on the nut 16 is completely fitted with the threaded section 229 on the socket housing 22, realizing the anti-loosening function of the nut 16, increasing the reliability after docking, thereby ensuring the high current transmission capability of the watertight high current connector.

[0072] To realize the rotational fit of the nut 16 outside the plug housing 12, as shown in FIG. Figure 2 , Figure 3 , Figure 4 As shown, an annular groove A2 123 is provided on the outer wall of the plug housing 12, and a retaining spring 17 is installed inside the annular groove A2 123; the outer wall of the plug housing 12 extends radially outward to form a limiting portion 126, and the limiting portion 126 is located between the annular groove A122 and the annular groove A2 123; the tail end of the nut 16 extends radially inward to form a limiting portion 2.

[0073] The setting of the second retaining spring 17 limits the tail end position of the nut 16, and the setting of the limiting portion 126 limits the head end position of the nut 16. The limiting portion on the nut 16 is located between the limiting portion 126 and the second retaining spring 17, thereby realizing the setting requirement of the nut 16 rotating and fitting outside the plug housing 12, and also ensuring the stability of the position of the nut 16.

[0074] In order to further ensure the high current transmission capability of the watertight high current connector, higher requirements are placed on the stability of the assembly of the internal components of the connector, mainly in the following aspects: between the plug insulator 13 and the plug housing 12, such as Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, an annular groove A3 124 is provided on the inner wall of the plug housing 12, a retaining spring A14 is installed in the annular groove A3 124, the inner wall of the plug housing 12 extends radially inward to form a single key A125, and a single key groove A132 is provided at the head end of the plug insulator 13, and the single key A125 matches the single key groove A132;

[0075] When the plug insulator 13 is assembled into the plug shell 12, the single key A125 at the head end of the plug insulator 13 is inserted into the single key groove A132, and the tail end of the plug shell 12 conflicts with the retaining spring A-14; the single key A125 cooperates with the single key groove A132 to fix the head end of the plug insulator 13, and the retaining spring A-14 fixes the tail end of the plug shell 12, thereby limiting the axial direction of the plug insulator 13 inside the plug shell 12; the single key A125 cooperates with the single key groove A132 to prevent the plug insulator 13 from rotating, thereby limiting the circumferential direction of the plug insulator 13 inside the plug shell 12, and ensuring the stability of the assembly of the plug insulator 13 inside the plug shell 12.

[0076] Between the socket insulator 23 and the socket housing 22, as shown in FIG. Figure 2 , Figure 7 , Figure 8 , Fig. 9 As shown, an annular groove B225 is provided on the inner wall of the socket housing 22, a retaining spring B24 is installed in the annular groove B225, a single key groove B223 is provided on the inner wall of the socket housing 22, the middle part of the socket insulator 23 extends radially outward to form a stopper, the stopper extends axially to form a single key B232, and the single key groove B223 matches the single key B232.

[0077] When the socket insulator 23 is assembled into the interior of the socket housing 22, the single key groove B223 on the socket insulator 23 is inserted into the interior of the single key B232, and the rear end of the socket insulator 23 abuts against the retaining spring B24;

[0078] The single key B232 cooperates with the single key groove B223 to fix the head end of the socket insulator 23, and the retaining spring B24 fixes the tail end of the socket shell 22, thereby limiting the socket insulator 23 in the axial direction inside the socket shell 22; the single key B232 cooperates with the single key groove B223 to prevent the socket insulator 23 from rotating, thereby limiting the socket insulator 23 in the circumferential direction inside the socket insulator 23, and ensuring the stability of the socket insulator 23 when assembled inside the socket shell 22.

[0079] Between the socket contact 15 and the plug insulator 13, as Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a plurality of holes A131 are provided in the plug insulator 13, and the inside of the hole A131 extends radially inward to form a limiting step A1311; a limiting step A155 is extended radially outward on the socket contact 15, and a retaining ring A153 and an elastic retaining ring A154 are sleeved on the mounting groove provided on the socket contact 15, and one end of the elastic retaining ring A154 is covered by the retaining ring A153, and the retaining ring A153 limits the elastic retaining ring A154, and the elastic retaining ring A154 is deformed under the limitation of the retaining ring A153 to prevent the elastic retaining ring A154 from moving in the axial direction;

[0080] The socket contact 15 is inserted into the hole A131 from the tail end of the plug insulator 13. During the assembly process, the elastic retaining ring A154 is squeezed and contracted by the limiting step A1311. After passing over the limiting step A1311, the elastic retaining ring A154 recovers. At this time, the elastic retaining ring A154 cooperates with the limiting step A155 to clamp the limiting step A1311, thereby completing the fixing of the position of the socket contact 15 inside the plug insulator 13.

[0081] Between the pin contact 27 and the socket insulator 23, as shown in FIG. Figure 2 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, a plurality of holes B231 are provided in the socket insulator 23, and the inner wall of the hole B231 extends radially inward to form a limiting step B-2311; the pin contact 27 extends radially outward to form a limiting step B-273, and a retaining ring B271 and an elastic retaining ring B272 are sleeved at the installation groove provided on the pin contact 27, and one end of the elastic retaining ring B272 is covered by the retaining ring B271, and the retaining ring B271 limits the elastic retaining ring B272, and the elastic retaining ring B272 is deformed under the limitation of the retaining ring B271 to prevent the elastic retaining ring B272 from moving in the axial direction;

[0082] like Figure 8 As shown, the head of the pin contact 27 is provided with an insulating sleeve 275; the provision of the insulating sleeve 275 enables the socket 20 to have a finger-proof function, thereby improving the safety of the watertight high-current connector in the present technical solution.

[0083] Insert the pin contact 27 from the tail end of the socket insulator 23 into the hole B231. During the assembly process, the elastic retaining ring B272 is squeezed and contracted by the limiting step B-2311. After passing over the limiting step B-2311, the elastic retaining ring B272 recovers. At this time, the elastic retaining ring B272 cooperates with the limiting step B-273 to clamp the limiting step B-2311, thereby completing the fixation of the pin contact 27 in the internal position of the socket insulator 23.

[0084] The watertight high current connector in this technical solution, such as Figure 2 , Fig.11 , Fig.12 As shown, 1. Between the plug housing 12 and the plug insulator 13, the single key A125 at the head end of the plug insulator 13 cooperates with the single key groove A132, and the tail end of the plug housing 12 contacts the retaining spring A-14, so as to fix the plug insulator 13 in the axial and circumferential directions inside the plug housing 12; between the socket housing 22 and the socket insulator 23, the single key B232 cooperates with the single key groove B223, and the retaining spring B24 contacts the tail end of the socket housing 22, so as to fix the socket insulator 23 in the axial and circumferential directions inside the socket housing 22;

[0085] 2. Between the plug insulator 13 and the socket contact 15, the elastic retaining ring A154 and the limiting step A2155 cooperate to clamp the limiting step A1311 to complete the fixing of the position of the socket contact 15 inside the plug insulator 13; between the socket insulator 23 and the pin contact 27, the elastic retaining ring B272 and the limiting step B273 cooperate to clamp the limiting step B12311 to complete the fixing of the position of the pin contact 27 inside the socket insulator 23.

[0086] This fixing method realizes the assembly requirements between the contact and the insulator, and between the insulator and the shell. At the same time, it makes the contact have higher stability when located inside the insulator, and the insulator has higher stability when located inside the shell. By ensuring the high stability of the assembly of the internal components of the connector and improving the ability to resist water pressure, the high current transmission capacity of the watertight high-current connector is further guaranteed.

[0087] At the same time, the arrangement of assembling the contact piece inside the insulator not only meets the assembly requirements, but also makes it easy to remove the contact piece inside the insulator, thereby solving the problem that the contact piece of the watertight electrical connector in the prior art does not have the removal function and the maintenance cost is high.

[0088] The specific methods for removing and removing the contact parts are as follows, refer to Fig.13 , Fig.14Taking the socket contact 15 as an example, a removal tool is used (the head of the removal tool has a through hole for accommodating the head of the socket contact 15), and the hole A131 is inserted from the head end of the plug 10, and an axial force is applied. The elastic retaining ring A154 shrinks under the action of the pressure provided by the removal tool. When the elastic retaining ring A154 shrinks to an outer diameter smaller than the diameter of the limiting step A-1311, the socket contact 15 is controlled to move toward the rear end of the plug 10 as a whole and disengage, thereby realizing the removal function.

[0089] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A watertight high current connector, comprising a plug (10) and a socket (20) that can be plugged and unplugged, characterized in that: The plug (10) comprises a plug housing (12), a plug insulator (13) assembled inside the plug housing (12), and a socket contact (15) assembled inside the plug insulator (13); at least one guide key (121) is arranged on the outer wall of the head end of the plug housing (12); a nut (16) is rotatably fitted on the outside of the plug housing (12); a center hole (151) is opened at the head end of the socket contact (15); a crown spring (152) is assembled in the center hole (151); The socket (20) comprises a socket housing (22), a socket insulator (23) assembled inside the socket housing (22), and a pin contact (27) assembled inside the socket insulator (23); the head end of the socket housing (22) extends axially to form a cavity inside thereof; the inner wall of the cavity is provided with guide key slots (222) whose number is the same as the guide keys (121); the guide keys (121) and the guide key slots (222) are slidably matched; and a threaded section (229) is arranged outside the head end of the socket housing (22); The head end of the plug housing (12) is inserted into the interior of the cavity, and the nut (16) and the threaded section (229) are threadedly rotated to drive the socket housing (22) to move closer to or away from the socket housing (22), wherein when the socket contact (15) contacts the pin contact (27), the head end of the pin contact (27) is covered by the crown spring (152).

2. The watertight high current connector according to claim 1, characterized in that: At least one annular groove A-(122) is provided on the outer wall of the head end of the plug housing (12), an O-ring (11) is installed in the annular groove A-(122), and the O-ring (11) is deformed by being squeezed with the inner wall of the cavity.

3. The watertight high current connector according to claim 2, characterized in that: An annular groove B3 (226) is formed on the outer wall of the socket housing (22), and an O-ring (26) is installed in the annular groove B3 (226); The outer wall of the socket housing (22) is provided with a mounting panel (221), and a ring groove B4 (227) is provided on the side wall of the mounting panel (221) opposite to the ring groove B3 (226), and an O-ring B1 (25) is installed in the ring groove B4 (227).

4. The watertight high current connector according to claim 3, characterized in that: The inner wall of the rear end of the socket housing (22) is provided with an annular groove B-(224), and a sealing glue is poured between the annular groove B-(224) and the pin contact piece (27).

5. The watertight high current connector according to claim 4, characterized in that: The tail end of the plug housing (12) is threadedly assembled with a tail attachment (18), and a sealing ring is arranged between the plug housing (12) and the tail attachment (18); The socket (20) further comprises a screw (28), a spring washer (29) and a wire pressing terminal (210); a threaded hole (274) is provided at the tail end of the pin contact piece (27); the screw (28) penetrates the spring washer (29) and the wire pressing terminal (210) and then is threadedly matched with the threaded hole (274).

6. The watertight high current connector according to claim 1, characterized in that: The inner wall of the cavity is provided with an annular groove B5 (228), a corrugated spring (21) is installed inside the annular groove B5 (228), and the corrugated spring (21) is sleeved on the head end of the socket housing (22); When the plug (10) and the socket (20) are plugged in and matched, the corrugated spring (21) is squeezed and deformed by the head end of the plug housing (12).

7. The watertight high current connector according to claim 6, characterized in that: The outer wall of the plug housing (12) is provided with an annular groove A2 (123), and a retaining spring (17) is installed inside the annular groove A2 (123); the outer wall of the plug housing (12) radially extends outward to form a limiting portion (126), and the limiting portion (126) is located between the annular groove A1 (122) and the annular groove A2 (123); The tail end of the nut (16) extends radially inward to form a second limiting portion, which is located between the first limiting portion (126) and the second retaining spring (17).

8. The watertight high current connector according to claim 1, characterized in that: The inner wall of the plug housing (12) is provided with an annular groove A3 (124), a retaining spring A1 (14) is installed in the annular groove A3 (124), the inner wall of the plug housing (12) extends radially inward to form a single key A (125), the head end of the plug insulator (13) is provided with a single key groove A (132), and the single key A (125) matches the single key groove A (132); The inner wall of the socket housing (22) is provided with an annular groove B2 (225), in which a retaining spring B (24) is installed, and the inner wall of the socket housing (22) is provided with a single key groove B (223), the middle part of the socket insulator (23) radially extends outward to form a stopper, and the stopper extends axially to form a single key B (232), and the single key groove B (223) matches the single key B (232).

9. The watertight high current connector according to claim 8, characterized in that: The plug insulator (13) is provided with a plurality of holes A (131) extending transversely therethrough, the inside of the hole A (131) extending radially inwardly to form a limiting step A1 (1311); the socket contact (15) is provided with a limiting step A2 (155) extending radially outwardly, a retaining ring A (153) and an elastic retaining ring A (154) sleeved on the mounting groove provided on the socket contact (15), one end of the elastic retaining ring A (154) being covered by the retaining ring A (153), and the elastic retaining ring A (154) and the limiting step A2 (155) clamping the limiting step A1 (1311); The socket insulator (23) is provided with a plurality of holes B (231) extending transversely therethrough, the inner wall of the hole B (231) extending radially inwardly to form a limiting step B1 (2311); the pin contact piece (27) is extended radially outwardly to form a limiting step B2 (273); a retaining ring B (271) and an elastic retaining ring B (272) are sleeved on the mounting groove provided on the pin contact piece (27); one end of the elastic retaining ring B (272) is covered by the retaining ring B (271), and the elastic retaining ring B (272) and the limiting step B2 (273) clamp the limiting step B1 (2311).

10. The watertight high current connector according to claim 9, characterized in that: The head of the pin contact (27) is provided with an insulating sleeve (275).

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