A vibration-resistant water-tight connector and method of mating thereof

Abstract

The present application relates to the technical field of connector, especially to a kind of anti-vibration water-tight connector and its mating method, the connector includes plug assembly and socket assembly, sleeve is slidably arranged on the plug housing of plug assembly, sleeve is connected with screw sleeve;Static ratchet is sleeved on sleeve, dynamic ratchet and elastic washer are sleeved on static ratchet and are contained in the counterbore of screw sleeve;First annular limiting platform is arranged on plug housing.When mating, first push screw sleeve to left to make locking piece left shift, then axially mate plug housing and socket housing, finally screw screw sleeve to make it screw on socket housing, and drive locking piece right shift until sleeve abuts against first annular limiting platform.The present application realizes first insertion and then locking by the mating mode of "first push and then screw", effectively avoids the damage of counterforce generated by cavity gas retention to thread, solves the problem of existing connector mating laborious and thread easy to wear, and has the advantages of convenient operation, reliable connection, strong anti-vibration, long mechanical life.

Description

Technical Field

[0001] This invention relates to the field of connector technology, and in particular to a vibration-resistant watertight connector and its mating method. Background Technology

[0002] Watertight connectors, also known as underwater sealed connectors or watertight plugs, are special electrical connection devices designed for reliable transmission of electrical signals, optical signals, or electrical energy in humid, underwater, or high-pressure marine environments. Their core function is to prevent the intrusion of external substances such as moisture, salt spray, and dust, ensuring stable operation of equipment under extreme conditions. With the rapid development of aviation, aerospace, and shipbuilding, unmanned equipment is evolving towards clustering, intelligence, and cross-regional deployment, gradually forming a cross-medium working system encompassing "air-surface-underwater." As a key component for signal transmission within and outside equipment cavities, watertight connectors must achieve two important functions—deep-water sealing and vibration resistance—to enable cross-medium use.

[0003] Conventional watertight connectors typically employ a threaded connection structure, relying on the friction between the threads for locking and preventing loosening. Existing technology, such as the patent with publication number CN118572420A, discloses a low insertion / extraction force watertight connector where the plug and socket assemblies connect via the external thread of the mating housing and the internal thread of the threaded sleeve. However, this type of watertight connector suffers from the following problems: low vibration resistance, prone to vibration-induced loosening in air and water environments, unsuitable for high-vibration conditions, and unable to meet the requirements of complex cross-medium applications.

[0004] To improve the vibration resistance of connectors, ratchet anti-loosening locking structures are commonly used.

[0005] For example, patent application CN121011912A discloses a highly reliable, ultra-low leakage rate gas-tight connector and its implementation method, wherein an elastic washer, a moving ratchet and a stationary ratchet are provided between the inner wall of the threaded sleeve and the outer shell of the head.

[0006] For example, patent application CN101635414A discloses an anti-nuclear electromagnetic pulse electrical connector, in which the plug is composed of a screw sleeve, an elastic washer, a stationary ratchet, a moving ratchet, a head shell, a plastic retaining ring, a lower base, a socket, a sealing body, a support spring ring, and a head base connected in sequence.

[0007] For example, patent application CN120073369A discloses a connector with a mating detection function, wherein the plug housing assembly includes a stationary ratchet, a moving ratchet, a wave spring washer, a screw sleeve, and a plug housing.

[0008] In the existing technologies described above, when the plug assembly and socket assembly are mated and locked together, an elastic washer acts on the moving ratchet, causing the moving ratchet to press tightly against the stationary ratchet, thereby preventing the screw sleeve from loosening. However, the ratchet anti-loosening locking structures used in the above-mentioned technologies all have the following problems:

[0009] (1) When the plug assembly and socket assembly of the electrical connector are mated together, they can only be mated by turning the screw sleeve and using the thread engagement between the screw sleeve and the socket housing to drive the plug assembly and socket assembly to come closer together. This mating method is prone to damaging the mating threads, resulting in a short mechanical life of the connector.

[0010] (2) Due to the sealing characteristics of the watertight connector, the plug assembly and socket assembly will have air trapped in the cavity when they are connected, which will generate an axial reaction force, making it difficult to connect, the connecting threads are easy to wear, and even the threads may get stuck after connection.

[0011] Therefore, there is an urgent need to provide a vibration-resistant and watertight connector and its mating method to solve the above problems. Summary of the Invention

[0012] The main objective of this invention is to propose a vibration-resistant watertight connector and its mating method, aiming to solve the technical problems of existing watertight connectors being prone to thread damage and difficulty in resisting the reaction force of air trapped inside the cavity during mating.

[0013] To achieve the above objectives, the present invention adopts the following technical solution:

[0014] In a first aspect, this invention proposes a vibration-resistant watertight connector, comprising a plug assembly and a socket assembly. The plug assembly includes a plug housing, a threaded sleeve, a stationary ratchet, a moving ratchet, an elastic washer, and a plug contact assembly disposed inside the plug housing. The socket assembly includes a socket housing and a socket contact assembly disposed inside the socket housing. Its innovation lies in:

[0015] A sleeve is slidably fitted onto the plug housing, and a threaded sleeve is fitted onto the outside of the plug housing, with the right end of the sleeve connected to the threaded sleeve. A stationary ratchet is fitted onto the sleeve, and a movable ratchet and an elastic washer are fitted onto the outer cylindrical surface of the right half of the stationary ratchet. The left section of the center hole of the threaded sleeve is set as a countersunk hole, and the stationary ratchet, movable ratchet, and elastic washer are disposed within the countersunk hole. The left side of the elastic washer abuts against the movable ratchet, and the right side of the elastic washer abuts against the right side wall of the countersunk hole. A first annular limiting platform is provided on the outer circumferential surface of the plug housing. When the plug assembly and the socket assembly are plugged into and locked together, the threaded sleeve is screwed onto the external thread of the socket housing, and the right end face of the sleeve abuts against the first annular limiting platform.

[0016] Preferably, a first retaining ring groove is provided on the outer peripheral surface of the plug housing, and a retaining ring is fitted on the plug housing, with the retaining ring being engaged in the first retaining ring groove; the retaining ring is used to block and limit the left end face of the sleeve.

[0017] Preferably, a third annular limiting platform is provided on the outer cylindrical surface at the right end of the sleeve, and a plurality of first protruding keys are evenly distributed in an annular pattern on the outer cylindrical surface in the middle of the sleeve; a second annular limiting platform is provided in the central hole of the threaded sleeve; a U-shaped groove for the first protruding keys to pass through is provided on the inner wall of the second annular limiting platform; after the sleeve and the threaded sleeve are assembled, the second annular limiting platform is positioned between the first protruding keys and the third annular limiting platform.

[0018] Preferably, a plurality of first keyways and a plurality of elastic support blocks are evenly distributed in an annular pattern on the inner bore surface of the stationary ratchet; an annular groove is provided on the outer cylindrical surface of the left half of the sleeve; the first convex key is disposed in the first keyway, and the elastic support block is engaged in the annular groove.

[0019] Preferably, a plurality of second keyways are formed on the inner wall of the countersunk hole; a plurality of second protruding keys are evenly distributed on the outer peripheral surface of the moving ratchet; the second protruding keys are disposed in the second keyways.

[0020] Preferably, a plurality of third protruding keys are provided on the outer cylindrical surface in the middle of the plug housing; a plurality of third keyways are provided on the inner bore surface of the sleeve; the third protruding keys and the third keyways are slidably engaged.

[0021] Preferably, a plurality of annular vulcanizing grooves are provided on the outer cylindrical surface at the left end of the plug housing; the annular vulcanizing grooves are provided on the left side of the first retaining ring groove, and a second retaining ring groove is provided on the right side of the first retaining ring groove.

[0022] Preferably, a plurality of first mounting grooves are provided on the outer cylindrical surface of the plug housing, and the first mounting grooves are located on the right side of the first annular limiting platform. A first sealing ring is installed in the first mounting groove; the plug housing and the socket housing are sealed together by the first sealing ring.

[0023] Preferably, a plurality of positioning keys are provided on the outer cylindrical surface at the right end of the plug housing; and a positioning keyway for cooperating with the positioning keys is provided on the inner wall of the socket housing.

[0024] Secondly, the present invention proposes a method for mating the above-mentioned vibration-resistant and watertight connector, comprising the following steps:

[0025] S1. First push the screw sleeve to the left, so that the locking assembly formed by the screw sleeve, the stationary ratchet, the moving ratchet, the elastic washer, and the sleeve moves to the left relative to the plug housing.

[0026] S2. Align the plug assembly with the socket assembly and apply opposing axial thrust to insert the plug housing and the socket housing into place. At this time, the socket contact assembly inside the socket housing and the plug contact assembly inside the plug housing are connected.

[0027] S3. Maintain axial thrust on the plug housing and socket housing in opposite directions, and screw the sleeve to engage with the external thread of the socket housing. The sleeve drives the stationary ratchet, the moving ratchet, the elastic washer, and the sleeve to move to the right synchronously until the right end face of the sleeve abuts against the left end face of the first annular limiting platform to complete the locking operation.

[0028] S4. When it is necessary to separate the plug assembly and the socket assembly, first apply opposing axial thrust to the plug housing and the socket housing, then turn the threaded sleeve in the opposite direction. The threaded sleeve drives the stationary ratchet, the moving ratchet, the elastic washer, and the sleeve to move to the left synchronously until the threaded sleeve and the external thread of the socket housing are completely separated. Then apply opposing axial pull to the plug housing and the socket housing to separate the plug assembly and the socket assembly.

[0029] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0030] (1) By using the anti-vibration watertight connector provided by the present invention, when the plug assembly and the insertion assembly are connected, the conventional direct screwing connection method can be changed to the "push and then screw" connection method, realizing the function of first insertion and then locking. This reduces the axial reaction force caused by air entrapment when the plug assembly and the socket assembly are connected to the connection thread, thereby reducing the friction of thread meshing and effectively reducing the wear between the internal thread of the screw sleeve and the external thread of the socket housing.

[0031] (2) The docking method provided by the present invention has simple and clear operation steps. The method of first inserting and then locking effectively protects the threads of the sleeve and the socket shell, which is conducive to extending the mechanical life of the connector. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 This is a cross-sectional view of the watertight connector provided by the present invention.

[0034] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0035] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0036] Figure 4 for Figure 1 A magnified view of point C in the middle.

[0037] Figure 5 This is a schematic diagram of the sleeve structure in this invention.

[0038] Figure 6 This is a schematic diagram of the stationary ratchet in this invention.

[0039] Figure 7 This is a schematic diagram of the moving ratchet in the present invention.

[0040] Figure 8 This is a schematic diagram of the plug housing in this invention.

[0041] Figure 9 This is a schematic diagram of the screw sleeve in this invention.

[0042] Figure 10 This is a schematic diagram of the socket housing in this invention.

[0043] Figure 11 This is a schematic diagram of the plug assembly and socket assembly about to be connected.

[0044] Figure 12 This is a schematic diagram showing the plug assembly and socket assembly mating together, with the sleeve not yet engaged.

[0045] Figure 13 This is a schematic diagram showing the plug assembly and socket assembly mating together and the screw sleeve being screwed in place.

[0046] Reference numerals: 1. Socket contact; 2. Retaining ring; 3. Sleeve; 31. Annular groove; 32. First key; 33. Third keyway; 34. Third annular limiting platform; 4. Stationary ratchet; 41. First keyway; 42. First tooth; 43. Elastic support block; 44. Ring-shaped body; 5. Moving ratchet; 51. Second tooth; 52. Second key; 6. Elastic washer; 7. Plug housing; 71. Annular vulcanizing groove; 72. First retaining ring groove; 73. Second retaining ring groove; 74. Third key; 75. First annular limiting platform; 76. First mounting groove; 77. Positioning key; 8. First sealing ring 9. Screw sleeve; 91. U-shaped groove; 92. Second keyway; 93. Second annular limiting platform; 94. Internal thread; 95. Countersunk hole; 10. Socket housing; 101. External thread; 102. Positioning keyway; 103. Thread relief groove; 104. Rectangular block; 105. Second mounting groove; 11. Second sealing ring; 12. Sealing body; 13. Silicone rubber; 14. Plastic ring; 15. Lower base; 16. Support spring ring; 161. Support spike; 17. Upper base; 18. Protective tube; 19. Fourth sealing ring; 20. Rubber pad; 21. Glass body; 22. Pin; 23. Third sealing ring. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0049] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0050] Combination Figures 1 to 10As shown, in one aspect, this embodiment provides a vibration-resistant watertight connector, including a plug assembly and a socket assembly. The plug assembly includes a plug housing 7, a screw sleeve 9, a stationary ratchet 4, a moving ratchet 5, an elastic washer 6, and a plug contact assembly disposed inside the plug housing 7. The socket assembly includes a socket housing 10 and a socket contact assembly disposed inside the socket housing 10.

[0051] Specifically, the plug contact assembly inside the plug housing 7 includes a sealing body 12, a lower base 15, an upper base 17, and several socket contacts 1. The sealing body 12, lower base 15, and upper base 17 are installed sequentially from left to right in the inner hole of the plug housing 7. The socket contacts 1 are inserted from the left end, passing through the sealing body 12 and lower base 15 in sequence and extending into the interior of the upper base 17. A plastic ring 14 is fitted onto the outside of the right half of the sealing body 12, and an elastic claw is provided on the right half of the plastic ring 14. The elastic claw engages with the annular groove on the inner surface of the plug housing 7 to form an axial limit. Silicone rubber 13 is potted between the outer circumferential surface of the left half of the sealing body 12 and the inner wall of the plug housing 7 to prevent the sealing body 12 from deviating and shifting.

[0052] A support spring ring 16 is provided inside the upper base 17, with its left end abutting against the lower base 15 and its right end abutting against the right side wall of the countersunk hole in the upper base 17. Multiple support spikes 161 are provided on the support spring ring 16. When the insertion contact 1 is inserted, the support spikes 161 engage with the stepped surface of the outer cylindrical surface of the insertion contact 1 for axial positioning, thus restricting the insertion contact 1 from moving to the left. The sealing body 12 is made of elastic rubber and has an interference fit with the insertion contact 1, using the interference fit to prevent rotation and movement of the insertion contact 1.

[0053] The right end of the socket contact 1 is fitted with a protective tube 18. The opening of the protective tube 18 is designed with a guide cone to guide the pin 22 on the socket contact so that the pin 22 can be inserted into the socket of the socket contact 1.

[0054] In the plug assembly, the hole position marks can be directly marked on the left end face of the sealing body 12 and the right end face of the upper base 17.

[0055] The socket contact assembly inside the socket housing 10 includes a glass body 21 and several pins 22 inserted into the glass body 21. The socket housing 10, the pins 22, and the glass body 21 are integrated through a sintering process. The pins 22 are rigid pins, and they achieve reliable contact with the socket contact 1 through an interference fit. A rubber pad 20 is adhered to the left end face of the glass body 21, and the hole position marks are directly engraved on the left side of the rubber pad 20.

[0056] A sleeve 3 is slidably fitted onto the plug housing 7. A threaded sleeve 9 is fitted onto the outside of the plug housing 7, and the right end of the sleeve 3 is connected to the threaded sleeve 9. A stationary ratchet 4 is fitted onto the sleeve 3, and a movable ratchet 5 and an elastic washer 6 are fitted onto the outer cylindrical surface of the right half of the stationary ratchet 4. The left section of the center hole of the threaded sleeve 9 is set as a countersunk hole 95, and the stationary ratchet 4, the movable ratchet 5, and the elastic washer 6 are set inside the countersunk hole 95. The left side of the elastic washer 6 abuts against the movable ratchet 5, and the right side of the elastic washer 6 abuts against the right side wall of the countersunk hole 95. A first annular limiting platform 75 is provided on the outer circumferential surface of the plug housing 7. When the plug assembly and the socket assembly are plugged into each other and locked, the threaded sleeve 9 is screwed onto the external thread 101 of the socket housing 10 through its internal thread 94, and the right end face of the sleeve 3 abuts against the first annular limiting platform 75.

[0057] In this embodiment, the locking assembly formed by the screw sleeve 9, the stationary ratchet 4, the moving ratchet 5, the elastic washer 6, and the sleeve 3 is fitted with a retaining ring 2 on the plug housing 7 to prevent it from falling off. Figure 1 and Figure 8 As shown, a first retaining ring groove 72 is provided on the outer peripheral surface of the plug housing 7, and the retaining ring 2 is engaged in the first retaining ring groove 72; the retaining ring 2 is used to form a blocking limit on the left end face of the sleeve 3.

[0058] A third annular limiting platform 34 is provided on the outer cylindrical surface at the right end of the sleeve 3, and multiple first protruding keys 32 are evenly distributed in a ring on the outer cylindrical surface in the middle of the sleeve 3. A second annular limiting platform 93 is provided in the central hole of the threaded sleeve 9; a U-shaped groove 91 for the first protruding keys 32 to pass through is formed on the inner wall of the second annular limiting platform 93. When assembling the sleeve 3 and the threaded sleeve 9, the sleeve 3 is inserted from the right end of the central hole of the threaded sleeve 9, so that the first protruding key 32 passes through the U-shaped groove 91. After the sleeve 3 is rotated at a certain angle relative to the central axis of the threaded sleeve 9, the second annular limiting platform 93 is locked between the first protruding key 32 and the third annular limiting platform 34 to form an axial limit. This connection structure allows the threaded sleeve 9 to rotate relative to the axis of the sleeve 3, but the two cannot move relative to each other in the axial direction.

[0059] Multiple first keyways 41 and multiple elastic support blocks 43 are evenly distributed in a ring on the inner surface of the stationary ratchet 4; an annular groove 31 is provided on the outer cylindrical surface of the left half of the sleeve 3; the first convex key 32 cooperates with the first keyway 41 to prevent the stationary ratchet 4 from rotating around the sleeve 3. The elastic support block 43 is locked in the annular groove 31, that is, the left side wall of the annular groove 31 forms a blocking and limiting effect on the left end face of the elastic support block 43, preventing the stationary ratchet 4 from falling off the sleeve 3.

[0060] Furthermore, multiple second keyways 92 are formed on the inner wall of the countersunk hole 95; multiple second protruding keys 52 are evenly distributed on the outer circumferential surface of the moving ratchet 5; the second protruding keys 52 cooperate with the second keyways 92, so that the moving ratchet 5 and the threaded sleeve 9 play an anti-rotation role. When the threaded sleeve 9 is tightened, the moving ratchet 5 rotates together with the threaded sleeve 9.

[0061] An annular body 44 is integrally formed on the outer cylindrical surface of the left half of the stationary ratchet 4. A first tooth 42 and a second tooth 51 that mesh with each other are respectively provided on the right side of the annular body 44 and the left side of the moving ratchet 5. The elastic force generated by the elastic washer 6 makes the moving ratchet 5 always close to the annular body 44 of the stationary ratchet 4, so that the moving ratchet 5 and the stationary ratchet 4 always remain in a meshed state and the two are not easy to rotate relative to each other, thereby realizing the anti-loosening and locking function.

[0062] In this embodiment, the locking assembly formed by the threaded sleeve 9, the stationary ratchet 4, the moving ratchet 5, the elastic washer 6, and the sleeve 3 can move axially on the plug housing 7. Specifically, a plurality of third protruding keys 74 are provided on the outer cylindrical surface in the middle of the plug housing 7; a plurality of third keyways 33 are provided on the inner bore surface of the sleeve 3; the third protruding keys 74 and the third keyways 33 are slidably engaged. That is, the sleeve 3 can move axially on the plug housing 7, but cannot rotate around the axis of the plug housing 7. When the sleeve 3 slides to the left limit position, the left end face of the sleeve 3 abuts against the retaining ring 2. When the sleeve 3 slides to the right limit position, the right end face of the sleeve 3 abuts against the first annular limiting platform 75.

[0063] Multiple annular vulcanizing grooves 71 are provided on the outer cylindrical surface at the left end of the plug housing 7; the annular vulcanizing grooves 71 are located to the left of the first retaining ring groove 72, and a second retaining ring groove 73 is located to the right of the first retaining ring groove 72. The annular vulcanizing grooves 71 can be used to connect vulcanized cables to achieve a watertight function. During vulcanization, the retaining ring 2 can be moved from the first retaining ring groove 72 to the second retaining ring groove 73, and the first retaining ring groove 72 is used to position the vulcanizing mold. After vulcanization is complete, the retaining ring 2 is moved from the second retaining ring groove 73 to the first retaining ring groove 72, thus completing the plug vulcanization.

[0064] Multiple first mounting grooves 76 are provided on the outer cylindrical surface of the plug housing 7, and the first mounting grooves 76 are located to the right of the first annular limiting platform 75. A first sealing ring 8 is installed in the first mounting groove 76; the plug housing 7 and the socket housing 10 are sealed together by the first sealing ring 8. In this embodiment, there are two first mounting grooves 76, and each first mounting groove 76 is equipped with a first sealing ring 8.

[0065] A rectangular block 104 is integrally formed on the exterior of the socket housing 10 for fixing the socket assembly to the device. A second mounting groove 105 is provided on the right side of the rectangular block 104, and a second sealing ring 11 is installed in the second mounting groove. Two third mounting grooves are provided on the outer cylindrical surface of the right section of the socket housing 10, and third sealing rings 23 are installed in the third mounting grooves. By utilizing the second sealing ring 11 and the third sealing ring 23, a seal is achieved between the socket housing 10 and the device.

[0066] A fourth sealing ring 19 is provided inside the socket housing 10. When the plug assembly and the socket assembly are in place, the right end of the plug housing 7 abuts against the fourth sealing ring 19, further achieving a seal between the socket housing 10 and the plug housing 7.

[0067] Combination Figure 8 and Figure 10 As shown, a plurality of positioning keys 77 are provided on the outer cylindrical surface at the right end of the plug housing 7; a positioning keyway 102 for cooperating with the positioning keys 77 is provided on the inner wall of the socket housing 10. By utilizing the structure of the positioning keys 77 cooperating with the positioning keyway 102, relative rotation between the plug housing 7 and the socket housing 10 is prevented.

[0068] Combination Figures 11 to 13 As shown, this embodiment also provides a method for mating the above-mentioned vibration-resistant and watertight connector, including the following steps:

[0069] S1. First, push the screw sleeve 9 to the left, so that the locking assembly formed by the screw sleeve 9, the stationary ratchet 4, the moving ratchet 5, the elastic washer 6, and the sleeve 3 moves to the left relative to the plug housing 7, until the left end face of the sleeve 3 abuts against the retaining ring 2.

[0070] S2. Align the plug assembly with the socket assembly, and align the positioning key 77 of the plug housing 7 with the positioning keyway 102 of the socket housing 10. Apply opposing axial thrusts to the plug housing 7 and the socket housing 10 to insert them into place. At this time, the socket contact assembly inside the socket housing 10 and the plug contact assembly inside the plug housing 7 are connected, that is, the left end of the pin 22 is inserted into the insertion hole of the socket contact 1, and the right end of the plug housing 7 abuts against the fourth sealing ring 19 and is compressed to form a seal. When the left end face of the sleeve 3 abuts against the retaining ring 2, and the plug assembly is aligned with the socket assembly so that the right end of the plug housing 7 abuts against the fourth sealing ring 19 and is compressed to form a seal, the internal thread 94 of the threaded sleeve 9 does not abut against or partially overlaps with the external thread 101 of the socket housing 10. That is, the position of the internal thread 94 and the external thread 101 will not affect the right end of the plug housing 7 abutting against the fourth sealing ring 19.

[0071] S3. Maintain an axial thrust in opposite directions on the plug housing 7 and the socket housing 10, and screw the sleeve 9 so that it engages with the external thread 101 of the socket housing 10. The sleeve 9 drives the stationary ratchet 4, the moving ratchet 5, the elastic washer 6, and the sleeve 3 to move to the right synchronously until the right end face of the sleeve 3 abuts against the left end face of the first annular limiting platform 75 to complete the locking operation. The screw sleeve 9 is indicated to be screwed in place by using the threaded relief groove 103 on the socket housing 10. Specifically, when the screw sleeve 9 completely covers the threaded relief groove 103 on the socket housing 10, it indicates that the screw sleeve 9 is screwed in place.

[0072] S4. When it is necessary to separate the plug assembly and the socket assembly, first apply opposing axial thrusts to the plug housing 7 and the socket housing 10, then twist the threaded sleeve 9 in the opposite direction. The threaded sleeve 9 drives the stationary ratchet 4, the moving ratchet 5, the elastic washer 6, and the sleeve 3 to move synchronously to the left until the threaded sleeve 9 and the external thread 101 of the socket housing 10 are completely separated. Then apply opposing axial pulls to the plug housing 7 and the socket housing 10 to separate the plug assembly and the socket assembly. This separation method can reduce the friction between the threads, thereby reducing thread wear.

[0073] The vibration-resistant watertight connector and its mating method provided in this embodiment integrate the ratchet anti-loosening locking structure with the sliding structure of the sleeve 3. Firstly, the ratchet anti-loosening locking structure enables the watertight connector to resist strong vibrations. Secondly, by utilizing the axially sliding structure of the sleeve 3, the mating action of the plug assembly and socket assembly can be decomposed, changing the conventional direct screwing mating method to a "push-then-tighten" mating method. This achieves the function of first inserting and then locking, reducing the axial reaction force caused by air entrapment during mating of the plug assembly and socket assembly, which directly acts on the connecting threads, thereby reducing the frictional force of the thread engagement and ultimately achieving easy mating of the plug and socket. The elastic force generated by the elastic washer 6 ensures that the moving ratchet 5 is tightly pressed against the annular body 44 of the stationary ratchet 4, and the second tooth 51 of the moving ratchet 5 and the first tooth 42 of the stationary ratchet 4 remain engaged. The moving ratchet 5 and the stationary ratchet 4 are not prone to relative rotation, thus achieving the anti-loosening locking function.

[0074] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A vibration-resistant watertight connector, comprising a plug assembly and a socket assembly, the plug assembly comprising a plug housing (7), a threaded sleeve (9), a stationary ratchet (4), a moving ratchet (5), an elastic washer (6), and a plug contact assembly disposed inside the plug housing (7); the socket assembly comprising a socket housing (10) and a socket contact assembly disposed inside the socket housing (10), characterized in that: A sleeve (3) is slidably fitted on the plug housing (7), and a screw sleeve (9) is fitted on the outside of the plug housing (7), with the right end of the sleeve (3) connected to the screw sleeve (9). The stationary ratchet (4) is sleeved on the sleeve (3), and the moving ratchet (5) and the elastic washer (6) are sleeved on the outer cylindrical surface of the right half of the stationary ratchet (4); The left section of the center hole of the threaded sleeve (9) is set as a countersunk hole (95), and the stationary ratchet (4), the moving ratchet (5) and the elastic washer (6) are set in the countersunk hole (95); the left side of the elastic washer (6) abuts against the moving ratchet (5), and the right side of the elastic washer (6) abuts against the right side wall of the countersunk hole (95); A first annular limiting platform (75) is provided on the outer peripheral surface of the plug housing (7); when the plug assembly and the socket assembly are plugged into each other and locked, the screw sleeve (9) is screwed onto the external thread (101) of the socket housing (10), and the right end face of the sleeve (3) abuts against the first annular limiting platform (75). A first retaining ring groove (72) is provided on the outer peripheral surface of the plug housing (7), and a retaining ring (2) is fitted on the plug housing (7), and the retaining ring (2) is engaged in the first retaining ring groove (72); the retaining ring (2) is used to form a blocking limit on the left end face of the sleeve (3); A third annular limiting platform (34) is provided on the outer cylindrical surface at the right end of the sleeve (3), and a plurality of first protruding keys (32) are evenly distributed in an annular pattern on the outer cylindrical surface in the middle of the sleeve (3). A second annular limiting platform (93) is provided in the center hole of the threaded sleeve (9); a U-shaped groove (91) for the first protruding key (32) to pass through is provided on the inner wall of the second annular limiting platform (93). After the sleeve (3) and the threaded sleeve (9) are assembled, the second annular limiting platform (93) is set between the first protruding key (32) and the third annular limiting platform (34); Multiple third protruding keys (74) are provided on the outer cylindrical surface in the middle of the plug housing (7); multiple third keyways (33) are provided on the inner hole surface of the sleeve (3); the third protruding keys (74) and the third keyways (33) slide in cooperation.

2. The vibration-resistant watertight connector according to claim 1, characterized in that, Multiple first keyways (41) and multiple elastic support blocks (43) are evenly distributed in a ring on the inner hole surface of the stationary ratchet (4). An annular groove (31) is provided on the outer cylindrical surface of the left half of the sleeve (3); The first convex key (32) is disposed in the first keyway (41), and the elastic support block (43) is engaged in the annular groove (31).

3. The vibration-resistant watertight connector according to claim 1, characterized in that, Multiple second keyways (92) are provided on the inner wall of the countersunk hole (95); Multiple second protruding keys (52) are evenly distributed on the outer peripheral surface of the moving ratchet (5); The second convex key (52) is disposed in the second keyway (92).

4. The vibration-resistant watertight connector according to claim 1, characterized in that, Multiple annular vulcanizing grooves (71) are provided on the outer cylindrical surface at the left end of the plug housing (7); the annular vulcanizing grooves (71) are provided on the left side of the first retaining ring groove (72), and a second retaining ring groove (73) is provided on the right side of the first retaining ring groove (72).

5. The vibration-resistant watertight connector according to claim 1, characterized in that, A plurality of first mounting grooves (76) are provided on the outer cylindrical surface of the plug housing (7), and the first mounting grooves (76) are located on the right side of the first annular limiting platform (75). A first sealing ring (8) is installed in the first mounting groove (76); the plug housing (7) and the socket housing (10) are sealed by the first sealing ring (8).

6. The vibration-resistant watertight connector according to claim 1, characterized in that, Multiple positioning keys (77) are provided on the outer cylindrical surface at the right end of the plug housing (7); a positioning keyway (102) for cooperating with the positioning keys (77) is provided on the inner wall of the socket housing (10).

7. A method for mating a vibration-resistant and watertight connector, using the vibration-resistant and watertight connector as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. First push the screw sleeve (9) to the left, so that the locking assembly formed by the screw sleeve (9), the stationary ratchet (4), the moving ratchet (5), the elastic washer (6), and the sleeve (3) moves to the left relative to the plug housing (7); S2. Align the plug assembly with the socket assembly and apply opposing axial thrust to insert the plug housing (7) and the socket housing (10) into place. At this time, the socket contact assembly inside the socket housing (10) and the plug contact assembly inside the plug housing (7) are connected. S3. Maintain axial thrust in opposite directions on the plug housing (7) and socket housing (10), and screw the sleeving (9) to engage with the external thread (101) of the socket housing (10). The sleeving (9) drives the stationary ratchet (4), the moving ratchet (5), the elastic washer (6), and the sleeve (3) to move to the right synchronously until the right end face of the sleeve (3) abuts against the left end face of the first annular limiting platform (75) to complete the locking operation. S4. When it is necessary to separate the plug assembly and the socket assembly, first apply opposing axial thrust to the plug housing (7) and the socket housing (10), then twist the threaded sleeve (9) in the opposite direction. The threaded sleeve (9) drives the stationary ratchet (4), the moving ratchet (5), the elastic washer (6), and the sleeve (3) to move to the left in sync until the threaded sleeve (9) and the external thread (101) of the socket housing (10) are completely separated. Then apply opposing axial tension to the plug housing (7) and the socket housing (10) to separate the plug assembly and the socket assembly.

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