A waterproof connector

Abstract

A waterproof connector, it includes, waterproof shell, it is the shell of rear end opening, it is equipped with three through holes on the front end surface, the front end port of through hole is equipped with the boss along the circumferential ring, it is equipped with the first compartment along the radial direction through the partition in the shell cavity corresponding to three through holes, it is equipped with the flange along the circumferential direction on the rear end part of shell, the end surface of flange is equipped with annular groove along the circumferential direction in the middle part, it is equipped with sealing ring in annular groove, electrical connector, it is inserted in the rear part in waterproof shell, three waterproof plugs of electric wire are set up respectively on the three through holes on the front end surface of waterproof shell.The utility model discloses through multiple sealing design, can satisfy the waterproof requirement of use environment, and, still have anticorrosive, dustproof, compact structure, small installation space and so on Advantage, realize the waterproof reliability under the full working condition, can satisfy IP67 grade waterproof requirement.

Description

Technical Field

[0001] This utility model relates to electrical connectors, and more particularly to a waterproof connector. Background Technology

[0002] Common connectors typically consist of an insulating base, conductive plates, and fastening screws. Wiring holes for the power supply and load are located on both sides of the connector.

[0003] For example, Chinese Patent Publication No. CN222530903U discloses "A waterproof connector, comprising: an insulating base, which is a shell open on one side; a substrate, the substrate having at least two first compartments on its inner side; and second compartments corresponding to the first compartments on its outer side; a mounting platform protruding from the upper part of the inner side of the substrate within the first compartment; a strip-shaped through hole connecting the first and second compartments near a fixing baffle on the substrate within the second compartment; and support baffles forming terminal block slots on the inner and outer sides of the substrate at the strip-shaped through hole, respectively, which cooperate with the mounting platform and the fixing baffle; and a countersunk hole with internal threads in the center of the mounting platform." The connector features a countersunk hole with internal and external threads; a mounting through hole and plug corresponding to the first compartment on the lower end plate; an end cap located on the opening side of the insulating base; several L-shaped conductive terminal boards, one side of which is mounted on a platform inside the first compartment, fitted onto the bushing and threaded, while the other side is inserted into a terminal board slot, forming an embedded installation on the insulating base; and several wiring terminal boards, with wires connected to their rear ends and their front ends extending from the plug into the first compartment, located outside one side of the conductive terminal board, and secured to the insulating base by a second wiring screw and bushing. This patent, by embedding the conductive terminal boards into the insulating base, ensures stability and provides waterproofing and rust prevention; simultaneously, the plug design for the wires ensures the airtightness of the insulating base. However, the connector's waterproof structure is simplistic, with a waterproof rating only up to IP66. Summary of the Invention

[0004] The purpose of this utility model is to provide a waterproof connector that, through a multi-seal design, can meet the waterproof requirements of the operating environment. In addition, it also has the advantages of rust prevention, dust prevention, compact structure, and small installation space, achieving waterproof reliability under all working conditions and meeting the IP67 waterproof requirement.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A waterproof connector comprising,

[0007] The waterproof shell is a shell with an open rear end. Its front end face has three through holes, and the front end of the through holes has a circumferential boss. Corresponding to the three through holes, the inner cavity of the shell has three first compartments arranged radially through a partition. The rear end of the shell has a flange arranged circumferentially, and the middle of the flange end face has an annular groove arranged circumferentially. A sealing ring is installed in the annular groove.

[0008] An electrical connector, inserted into the rear of a waterproof housing; it includes,

[0009] An insulating base, which is a shell open at both ends, includes:

[0010] A substrate has several first partitions vertically spaced along its length on its inner side. At least three parallel and independent second compartments are formed along the length of the inner side of the substrate. Second and third partitions connected to the first partitions are horizontally arranged above and below the first partitions, and the second and third partitions are staggered in height to form a two-layer structure. Corresponding to the two-layer structure, fourth and fifth partitions are arranged above and below the first partitions. The fourth and fifth partitions are perpendicular to the first partitions and are connected to the second and third partitions respectively, separating the second compartments into a power supply side and a load side. Thus, a two-layer, staggered mounting platform is formed in the second compartment. A first fixing groove is provided in the middle of the corresponding second and third partitions on the mounting platform, and a second fixing groove is provided in the middle of the corresponding fourth and fifth partitions. A countersunk hole is provided in the center of the bottom surface of the second fixing groove. A fixing plate protrudes from the open end of the insulating base on the load side and is connected to the flange at the rear end of the waterproof shell by connecting bolts.

[0011] Several conductive terminal boards, each conductive terminal board is L-shaped, with connection holes on both sides. One side is located on one side of the mounting platform corresponding to the first fixing groove, and the other side is located on one side of the mounting platform corresponding to the second fixing groove.

[0012] Several locking screws and nuts are provided on two sides of the conductive terminal board. The head of the locking screw is provided in the first fixing groove, and one side of the conductive terminal board passes through the locking screw and is locked to the mounting platform by the nut. The nut is provided in the second fixing groove, and the other side of the conductive terminal board is provided on the nut and locked to the mounting platform by the locking screw.

[0013] Three waterproof plugs for electrical wires are respectively installed in three through holes on the front face of the waterproof housing.

[0014] Preferably, the waterproof plug for the wire includes a body and plug caps and plug heads at both ends; wherein,

[0015] The body is cylindrical, with at least two annular protrusions spaced apart along the axial direction on its inner wall; and at least two annular flanges spaced apart along the axial direction on its outer wall.

[0016] The plug cap has a diameter larger than that of the main body, and a through hole for the power supply line to pass through is provided in the center of its front end face. A diaphragm is provided in the middle of the inner cavity of the plug cap, and a cross-shaped slit for the cable to pass through is provided in the center of the diaphragm. A fixing groove is provided circumferentially on the outer edge of the rear end face of the plug cap.

[0017] The plug has a diameter larger than that of the body, and its outer wall has a conical surface in the middle; a through hole for the power supply line to pass through is provided in the center of its front end face.

[0018] Preferably, the body, cap, and head of the waterproof plug for electrical wires are an integral structure.

[0019] Preferably, the outer edge of the rear end face of the plug is provided with a fixing groove along the circumference, and correspondingly, the front port of the through hole on the front end face of the waterproof shell is provided with a boss along the circumference, and is thus embedded in the fixing groove to form a sealing structure.

[0020] Preferably, the inner walls of the waterproof housing on both sides are provided with limiting plates that protrude from the two sides of the insulating base.

[0021] Preferably, the conductive terminal plate has two sides of one side bent inward to form a fixing part, and correspondingly, the fourth and fifth partitions on both sides of the second fixing groove are provided with fixing slots for the fixing part to be inserted and fixed.

[0022] Preferably, the connection hole port on one side of the fixing part of the conductive terminal plate is provided with a protrusion with internal thread along the circumferential direction.

[0023] Preferably, the base plate, the first partition, the second partition, the third partition, the fourth partition, the fifth partition, and the fixing plate of the insulating base are an integral structure.

[0024] Preferably, the waterproof plug for the wire is made of rubber or silicone.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] 1. Multi-dimensional sealing structure design to build a three-dimensional waterproof barrier

[0027] 1.1 Threaded connection pre-tightening seal

[0028] Main sealing function: When the waterproof housing and the waterproof plug for the wire are screwed together, the outer annular flange-annular sealing ring (rubber or silicone material) is squeezed by the preset torque preload, causing it to be radially compressed and deformed, filling the thread gaps and micro-defects of the mounting surface, and blocking the axial water ingress path.

[0029] 1.2 Annular Groove Dynamic Seal

[0030] Secondary radial seal: A diaphragm and at least two annular protrusions are spaced axially inside the wire waterproof plug. A bidirectional seal is formed by interference fit of the inner and outer diameters to prevent external liquid from seeping in radially. At the same time, it wraps the internal functional components (such as cables / spindle cores) to form a contact surface seal and prevent the internal medium from leaking out.

[0031] 1.3 End face combined seal

[0032] Rigid sealing of the contact surface: The through-hole boss on the front end face of the waterproof shell is embedded in the fixing groove of the plug cap, and together with the annular flange-high-strength flat washer (hidden structure) on the plug cap, a hard seal is formed to block the penetration of surface water film.

[0033] Dynamic compensation sealing: The through-hole boss on the front end face of the waterproof shell is embedded in the plug fixing groove. The elastic deformation of the plug compensates for minor installation deviations and maintains the sealing surface contact pressure under vibration and impact conditions to prevent fatigue failure.

[0034] 1.4 Redundancy Protection and Reliability Design

[0035] Redundant protection and reliability design: The inner wall protrusion of the waterproof plug body focuses on radial sealing, while the inner diaphragm of the plug cap is responsible for dynamic protection. The groove on the rear end face of the plug cap and the through hole boss on the front end face of the waterproof shell achieve end face compensation. The functions of different sealing components complement each other to avoid the failure of a single component leading to the overall failure.

[0036] 2. The electrical connector of this utility model has a double-layer structure, combined with an L-shaped conductive terminal board, which makes the entire electrical connector structure more compact, reduces its size, requires less installation space, and improves its waterproof performance. Moreover, the insulating base of the electrical connector of this utility model is an integrated structure design, compared with the three-body design of the base of similar connectors in the prior art. The structure of this utility model is more compact, and the installation is more convenient and efficient.

[0037] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0038] This utility model adopts a multi-seal structure design, namely a triple core architecture of "threaded pre-tightening seal + annular groove dynamic seal + end face combination seal", which, combined with precision fitting tolerances and material properties, achieves waterproof reliability under all working conditions and can meet the IP67 waterproof requirements.

[0039] The electrical connector described in this utility model features a compact design, reducing its size and installation space, while also improving its waterproof performance. Attached Figure Description

[0040] Figure 1 Three-dimensional representation of the present utility model Figure 1 ;

[0041] Figure 2Three-dimensional representation of the present utility model Figure 2 ;

[0042] Figure 3 This is an exploded perspective view of an embodiment of the present utility model.

[0043] Figure 4 This is a front view of an embodiment of the present utility model;

[0044] Figure 5 for Figure 4 AA section view;

[0045] Figure 6 This is a perspective view of the waterproof casing in an embodiment of this utility model;

[0046] Figure 7 The three-dimensional electrical connector in the embodiment of this utility model Figure 1 ;

[0047] Figure 8 The three-dimensional electrical connector in the embodiment of this utility model Figure 2 ;

[0048] Figure 9 This is an exploded perspective view of the electrical connector in an embodiment of this utility model;

[0049] Figure 10 The three-dimensional representation of the insulating base in this utility model embodiment Figure 1 ;

[0050] Figure 11 The three-dimensional representation of the insulating base in this utility model embodiment Figure 2 ;

[0051] Figure 12 The three-dimensional shape of the waterproof plug for wires in this utility model embodiment Figure 1 ;

[0052] Figure 13 The three-dimensional shape of the waterproof plug for wires in this utility model embodiment Figure 2 ;

[0053] Figure 14 The three-dimensional shape of the waterproof plug for wires in this utility model embodiment Figure 3 ;

[0054] Figure 15 This is a front view of the waterproof plug for the wire in an embodiment of this utility model;

[0055] Figure 16 for Figure 15 BB cross-sectional view;

[0056] Figure 17 This is a half-sectional view of an embodiment of the present utility model. Detailed Implementation

[0057] See Figures 1 to 17 The waterproof connector of this utility model includes,

[0058] The waterproof housing 10 is a housing with an open rear end. Its front end face has three through holes 101. The front end of the through holes 101 is provided with a circumferential boss 102. Corresponding to the three through holes 101, the inner cavity of the housing is provided with three first compartments 104 in the radial direction through a partition 103. The rear end of the housing is provided with a flange 105 in the circumferential direction. The middle of the end face of the flange 105 is provided with an annular groove 106 in the circumferential direction. A sealing ring 107 is provided in the annular groove 106.

[0059] Electrical connector 20 is inserted into the rear part of the waterproof housing 10; it includes,

[0060] The insulating base 1 is a shell with openings at both ends, comprising:

[0061] A substrate 11 has several first partitions 12 vertically spaced along its length on its inner side. At least three parallel and independent second compartments 111 are formed on the inner side of the substrate 11 along its length. Second partitions 13 and 14, connected to the first partitions 12, are horizontally arranged vertically above and below the first partitions 111. The second partitions 13 and 14 are staggered vertically in height, forming a two-layer structure. Corresponding to this two-layer structure, fourth partitions 15 and 16 are arranged vertically above and below the first partitions 13. The fourth partitions 15 and 16 are perpendicular to the first partitions 13 and are respectively connected to the second partitions 111. 3. The third partition 14 separates the second compartment 111 into the power supply side and the load side, thus forming a two-layered, staggered installation platform in the second compartment 111. The second partition 13 and the third partition 14 on the installation platform are provided with first fixing grooves 131 and 141 in the middle, and the fourth partition 15 and the fifth partition 16 are provided with second fixing grooves 151 and 161 in the middle. The bottom surface of the second fixing grooves 151 and 161 is provided with countersunk holes. The opening end of the insulating base 1 on the load side is provided with a fixing plate 17, which is connected to the flange 104 at the rear end of the waterproof shell 10 by connecting bolts.

[0062] A plurality of conductive terminal plates 2, 2', the conductive terminal plate 2 (taking the conductive terminal plate 2 as an example, the same below) is L-shaped, and connection holes 21, 21' are respectively provided on its two sides. One side is set on one side of the mounting platform corresponding to the first fixing groove 131, and the other side is set on one side of the mounting platform corresponding to the second fixing groove 151.

[0063] A number of locking screws 3, 3' and nuts 4, 4' are provided on two sides of the conductive terminal plate 2. The head of the locking screw 3 is provided in the first fixing groove 131, and one side of the conductive terminal plate 2 passes through the locking screw and is locked to the mounting platform by the nut 4. The nut 4' is provided in the second fixing groove 151, and the other side of the conductive terminal plate 2' is provided on the nut 4' and is locked to the mounting platform by the locking screw 3'.

[0064] Three waterproof plugs 30 for electrical wires are respectively installed in three through holes 101 on the front end face of the waterproof housing 10.

[0065] Preferably, the waterproof plug 30 for electrical wires includes a body 5 and plug caps 6 and plug heads 7 at both ends; wherein,

[0066] The body 5 is cylindrical, with at least two annular protrusions 51 spaced apart along the axial direction on its inner wall; and at least two annular flanges 52 spaced apart along the axial direction on its outer wall.

[0067] The plug 6 has a diameter larger than that of the body 5. A through hole 61 for the power supply line to pass through is provided in the center of its front end face. A diaphragm 62 is provided in the middle of the inner cavity of the plug 6. A cross-shaped slit 621 for the cable to pass through is provided in the center of the diaphragm 62.

[0068] The plug 7 has a diameter larger than that of the body 1, and its outer wall has a conical surface in the middle; a through hole 71 for the power supply line to pass through is provided in the center of its front end face.

[0069] Preferably, the outer edge of the rear end face of the plug 6 is provided with a fixing groove 63 along the circumferential direction. Correspondingly, the front port of the through hole 101 on the front end face of the waterproof shell 10 is provided with a boss 102 along the circumferential direction, and is thus embedded in the fixing groove 63 to form a sealing structure.

[0070] Preferably, the body, cap, and head of the waterproof plug for electrical wires are an integral structure.

[0071] Preferably, the inner walls of the waterproof housing 10 are provided with limiting plates 108 on both sides corresponding to the two sides of the insulating base 1.

[0072] Preferably, the conductive terminal plate 2 (taking the conductive terminal plate 2 as an example, the same below) has two sides of one side bent inward to form a fixing part 22. Correspondingly, the fifth partition plate 16 on both sides of the second fixing groove 161 is provided with a fixing slot 162 for the fixing part 22 to be inserted and fixed.

[0073] Preferably, a protrusion 23 with internal thread is provided circumferentially at the port of the connection hole 21' on one side of the fixing part 22 of the conductive terminal plate 2.

[0074] Preferably, the base plate, the first partition, the second partition, the third partition, the fourth partition, the fifth partition, and the fixing plate of the insulating base are an integral structure.

[0075] Preferably, the waterproof plug for the wire is made of rubber or silicone, and more preferably fluororubber.

[0076] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of the invention without departing from the scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A waterproof connector characterized by comprising: include, The waterproof shell is a shell with an open rear end and three through holes on its front end face; corresponding to the three through holes, three first compartments are provided in the inner cavity of the shell along the radial direction through the partition; a flange is provided at the rear end of the shell along the circumferential direction, and an annular groove is provided in the middle of the flange end face along the circumferential direction, and a sealing ring is provided in the annular groove; An electrical connector is inserted into the rear of the waterproof housing. It includes, An insulating base, which is a shell open at both ends, includes: A substrate has several first partitions vertically spaced along its length on its inner side. At least three parallel and independent second compartments are formed along the length of the inner side of the substrate. Second and third partitions connected to the first partitions are horizontally arranged above and below the first partitions, and the second and third partitions are staggered in height to form a two-layer structure. Corresponding to the two-layer structure, fourth and fifth partitions are arranged above and below the first partitions. The fourth and fifth partitions are perpendicular to the first partitions and are connected to the second and third partitions respectively, separating the second compartments into a power supply side and a load side. Thus, a two-layer, staggered mounting platform is formed in the second compartment. A first fixing groove is provided in the middle of the corresponding second and third partitions on the mounting platform, and a second fixing groove is provided in the middle of the corresponding fourth and fifth partitions. A countersunk hole is provided in the center of the bottom surface of the second fixing groove. A fixing plate protrudes from the open end of the insulating base on the load side and is connected to the flange at the rear end of the waterproof shell by connecting bolts. Several conductive terminal boards, each conductive terminal board is L-shaped, with connection holes on both sides. One side is located on one side of the mounting platform corresponding to the first fixing groove, and the other side is located on one side of the mounting platform corresponding to the second fixing groove. Several locking screws and nuts are provided on two sides of the conductive terminal board. The head of the locking screw is provided in the first fixing groove, and one side of the conductive terminal board passes through the locking screw and is locked to the mounting platform by the nut. The nut is provided in the second fixing groove, and the other side of the conductive terminal board is provided on the nut and locked to the mounting platform by the locking screw. Three waterproof plugs for electrical wires are respectively installed in three through holes on the front face of the waterproof housing.

2. The waterproof connector as described in claim 1, characterized in that, The waterproof plug for the electrical wire includes a body and plug caps and plug heads at both ends; wherein, The body is cylindrical, with at least two annular protrusions spaced apart along the axial direction on its inner wall; and at least two annular flanges spaced apart along the axial direction on its outer wall. The plug cap has a diameter larger than that of the main body, and a through hole for the power supply line to pass through is provided in the center of its front end face. A diaphragm is provided in the middle of the inner cavity of the plug cap, and a cross-shaped slit for the cable to pass through is provided in the center of the diaphragm. The plug has a diameter larger than that of the body, and its outer wall has a conical surface in the middle; a through hole for the power supply line to pass through is provided in the center of its front end face.

3. The waterproof connector of claim 2, wherein, The outer edge of the rear end face of the plug is provided with a fixing groove along the circumference. Correspondingly, the front port of the through hole on the front end face of the waterproof shell is provided with a boss along the circumference, and is thus embedded in the fixing groove to form a sealing structure.

4. The waterproof connector according to claim 2 or 3, characterized by The waterproof plug for electrical wires has a body, cap, and head that are integrated into one piece.

5. The waterproof connector of claim 1, wherein, Limiting plates are protruding from the inner walls of the waterproof housing on both sides corresponding to the two sides of the insulating base.

6. The waterproof connector as described in claim 1, characterized in that, The conductive terminal plate has two sides of one side bent inward to form a fixing part. Correspondingly, the fourth and fifth partitions on both sides of the second fixing groove are provided with fixing slots for the fixing part to be inserted and fixed.

7. The waterproof connector as described in claim 6, characterized in that, The connection hole port on one side of the fixing part of the conductive terminal plate is provided with a protrusion with internal thread along the circumferential direction.

8. The waterproof connector of claim 1, wherein, The insulating base consists of a substrate, a first partition, a second partition, a third partition, a fourth partition, a fifth partition, and a fixing plate, all of which are integrally formed.

9. The waterproof connector according to claim 1 or 2 or 3, wherein The waterproof plug for the wire is made of rubber or silicone.

10. The waterproof connector as described in claim 4, characterized in that, The waterproof plug for the wire is made of rubber or silicone.

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