A multiple waterproof connector for automobile wiring harness

Abstract

The utility model relates to the technical field of automobile parts, disclose a multiple waterproof connector of automobile wire harness, including wire harness connector shell and its inside plug -in base and the docking base, two base are fixed respectively with the plug -in end terminal and the docking end terminal. Its core waterproof structure lies in: setting up in the wire harness entrance is used to wrap wire harness waterproof sealing pad of wire harness, and the terminal waterproof sealing ring that surrounds and seals each terminal crimp root department, and after two base complete docking, the docking sealing washer is pressed between the docking face, and three sealing structures construct three -dimensional waterproof system jointly. In addition, the independent wire harness fixing assembly locks wire harness in the automobile sheet metal part. The utility model effectively solves the single waterproof structure of existing connector, low reliability problem, realizes high -grade all -round waterproof protection, and the abnormal sound that wire harness produced because of vibration is eradicated simultaneously, and the reliability of connection is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a multi-waterproof connector for automotive wiring harnesses. Background Technology

[0002] With the increasing level of automotive electronics, the number of electronic devices installed in vehicles is growing, leading to a corresponding increase in demand for wiring harness connectors used to transmit electrical signals between these devices. Automotive wiring harness connectors are widely distributed in areas such as the engine compartment and chassis, and their working environment typically faces severe challenges from high temperatures, vibrations, humidity, and oil contamination.

[0003] Especially in humid or watery environments, ensuring the dryness and insulation of the electrical connection points inside the connector is crucial. Once moisture enters the connector, it can easily cause terminal corrosion, short circuits, or signal transmission distortion, directly affecting the operational safety and reliability of the vehicle.

[0004] Therefore, automotive wiring harness connectors in the prior art typically employ a waterproof design. A common waterproofing measure is to place a sealing ring on the mating surface of the connector plug and socket housings. The sealing ring fills the gap between the housings through compression and deformation during insertion, preventing external moisture from penetrating from the mating point.

[0005] However, in-depth research revealed that this single-point sealing structure, which only seals the housing mating surface, has significant limitations in waterproofing. Moisture intrusion paths are diverse. Besides the gaps at the housing mating surface, moisture often seeps in from the connector's wire inlet along the outer surface of the wires, or penetrates to the terminal root through the tiny gaps (capillary effect) between the copper strands and insulation inside the wires. Existing single-point sealing methods offer almost no protection against these latter two intrusion paths, resulting in a weakness in the overall waterproofing solution. Under complex and harsh operating conditions, the risk of waterproofing failure remains high, making it difficult to meet high-level waterproofing requirements. Therefore, this invention proposes a multi-layered waterproof connector for automotive wiring harnesses to address the shortcomings of existing technologies. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a multi-waterproof connector for automotive wiring harnesses, aiming to improve the problem that some existing multi-waterproof connectors for automotive wiring harnesses have a single waterproof structure, which can only protect the shell mating surface and cannot effectively prevent moisture from entering through multiple paths such as the wiring harness inlet and terminal root.

[0007] This utility model provides a multi-waterproof connector for automotive wiring harnesses, including a wiring harness connector housing, a plug base, a mating base, a plug terminal, and a mating terminal, the plug terminal and the mating terminal being used to connect wire harnesses; as well as a wiring harness waterproof sealing gasket, a terminal waterproof sealing ring, and a mating sealing gasket.

[0008] The wire harness waterproof sealing gasket is fitted at the entrance of the wire harness into the wire harness connector housing to achieve a waterproof seal at the connector entrance.

[0009] Furthermore, the terminal waterproof sealing ring surrounds and seals the root of the wire harness connecting the plug-in terminal and the mating terminal, providing sealing protection for each individual terminal and preventing moisture from entering along the wire's own structure.

[0010] Furthermore, the mating sealing gasket is pressed and sealed between the mating surfaces of the plug-in base and the mating base to achieve a reliable seal on the mating surfaces after the two bases are plugged in, thus forming complete external protection.

[0011] Preferably, a guide post is fixed on the plug-in base, and a guide groove is correspondingly provided on the mating base. The guide post and the guide groove slide together. This design can provide precise mechanical guidance during plugging and effectively prevent damage to the internal terminals due to misalignment.

[0012] Preferably, the multi-waterproof connector for automotive wiring harnesses also includes a wiring harness fixing component. The wiring harness fixing component is independent of the wiring harness connector housing and is sleeved on the wire harness to securely fix the wire harness to the automotive sheet metal parts, thereby preventing the wiring harness from shaking due to vehicle vibration and eliminating the source of abnormal noise.

[0013] Preferably, the wire harness fixing assembly includes a wire harness cover and a pressure plate base. The wire harness is clamped and fixed between the wire harness cover and the pressure plate base. The clamping force formed by the two achieves reliable fixing of the wire harness and prevents axial movement of the wire harness.

[0014] Preferably, the base plate of the pressure plate and one end of the wire harness cover are integrally connected by a connecting piece. This structure forms a hinge-like effect, allowing the wire harness cover and the base plate of the pressure plate to open and close elastically, which greatly facilitates the insertion or removal of the wire harness.

[0015] Preferably, the wiring harness fixing assembly further includes a fixing post extending downward from the bottom surface of the pressure plate, and a fixing pin is connected to the end of the fixing post. The fixing pin is used to engage with the reserved hole in the automotive sheet metal part to achieve quick snap-fit ​​installation without tools.

[0016] Preferably, the wiring harness fixing assembly also includes a fixing limiting piece extending from the side of the pressure plate base. The fixing limiting piece is used to abut against the edge structure of the body sheet metal part during installation, which can play a role in assisting positioning and preventing unnecessary rotation of the wiring harness fixing assembly.

[0017] Preferably, a functionally integrated wire harness connection assembly is formed by the plug-in base, the mating base, the plug-in terminal, the mating terminal, the wire harness waterproof sealing gasket, the terminal waterproof sealing ring, the mating sealing gasket, the guide post, and the guide groove.

[0018] This utility model has the following beneficial effects: 1. This utility model solves the problem of insufficient waterproof reliability caused by the existing connector's single waterproof structure, which cannot completely prevent moisture from entering through multiple paths such as the wire harness inlet, terminal root, and shell mating surface. It achieves the technical effect of constructing a multi-layered three-dimensional waterproof barrier, significantly improving the sealing performance and operational reliability of the connector in humid and harsh environments. This is achieved by setting a wire harness waterproof sealing gasket at the wire harness inlet, a terminal waterproof sealing ring wrapped around the root of each terminal, and a mating sealing gasket set between the plug and the mating base.

[0019] 2. This utility model, by adding a wire harness fixing component independent of the connector body, uses a wire harness cover and a pressure plate base to clamp the wire harness, and uses fixing posts and fixing pins to firmly lock it onto the automotive sheet metal parts. This solves the problem that after the automotive wire harness is connected, the lack of effective fixation of the wire harness body makes it easy to vibrate with the vehicle body during driving, causing abnormal noise due to collision with the sheet metal parts. It achieves the technical effect of effectively suppressing wire harness shaking, eliminating vibration and abnormal noise from the source, improving driving comfort and protecting the wire harness from wear.

[0020] 3. This utility model solves the problem of terminal damage and difficulty in insertion and removal caused by misalignment during connector docking by setting guide posts on the insertion base and matching guide grooves on the docking base. This reduces assembly efficiency and achieves the technical effect of automatic centering guidance, ensuring smooth and accurate insertion and removal, effectively protecting internal terminals from damage, and improving production assembly efficiency and connection reliability. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a multi-waterproof connector for an automotive wiring harness proposed in this utility model. Figure 2 This is a schematic diagram of the plug-in terminal of a multi-waterproof connector for an automotive wiring harness proposed in this utility model. Figure 3 This is a schematic diagram of the mating terminal of a multi-waterproof connector for automotive wiring harnesses proposed in this utility model. Figure 4 This is a schematic diagram of the structure of the wire harness cover for a multi-waterproof connector for automotive wiring harnesses proposed in this utility model. Legend: 1. Wire harness connector housing; 2. Wire harness connection assembly; 21. Plug base; 22. Guide post; 23. Wire harness waterproof sealing gasket; 24. Terminal waterproof sealing ring; 25. Plug end terminal; 26. Butt base; 27. Butt end terminal; 28. Butt sealing gasket; 29. ​​Guide groove; 3. Wire harness fixing assembly; 31. Wire harness cover; 32. Pressure plate base; 33. Connecting piece; 34. Fixing limit piece; 35. Fixing post; 36. Fixing pin piece; 4. Wire harness. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0023] Reference Figures 1 to 4 This utility model provides a multi-waterproof connector for automotive wiring harnesses, aiming to solve the problems of single waterproof structure, insufficient reliability, and abnormal noise caused by vibration in existing connectors.

[0024] like Figure 1 As shown, the multi-waterproof connector for automotive wiring harnesses includes a wiring harness connector housing 1 and a wiring harness connection assembly 2 housed inside the wiring harness connector housing 1. The wiring harness connection assembly 2 is used to achieve electrical connection of two wire harnesses 4. The wiring harness connector housing 1 provides housing space and physical protection for the internal wiring harness connection assembly 2.

[0025] Reference Figure 1 , Figure 2 and Figure 3 The wire harness connection assembly 2 includes a plug-in base 21 and a docking base 26. A plug-in terminal 25 is fixed on the plug-in base 21, and a docking terminal 27 is fixed on the docking base 26. The plug-in base 21 and the docking base 26 are plugged into each other, so that the plug-in terminal 25 and the docking terminal 27 are electrically connected, thereby completing the docking of the wire harness 4.

[0026] This is achieved by setting a waterproof sealing gasket 23 for the wire harness. The waterproof sealing gasket 23 seals and fits at the entrance of the wire harness 4 into the housing 1 of the wire harness connector. When the wire harness 4 passes through the waterproof sealing gasket 23, the elastic inner hole of the waterproof sealing gasket 23 will tightly wrap the outer insulation of the wire harness 4 to prevent external moisture or dust from entering the interior of the connector along the surface of the wire harness.

[0027] This is achieved by setting multiple terminal waterproof sealing rings 24. Each terminal waterproof sealing ring 24 surrounds and seals the root of the wire harness 4 connecting the plug terminal 25 and the mating terminal 27, that is, the position behind the terminal crimped wire core. This structure fills the tiny gap between the wire insulation and the terminal metal parts, effectively preventing moisture from penetrating to the electrical contact point along the structure of the wire itself.

[0028] This is achieved by setting a mating sealing gasket 28, which is pressed and sealed between the mating surfaces of the insertion base 21 and the mating base 26. When the insertion base 21 and the mating base 26 are fully inserted into place, the mating sealing gasket 28 is squeezed and deformed, thereby filling the gap between the mating surfaces of the two bases, forming the last solid line of defense against the intrusion of the external environment.

[0029] Reference Figure 2 and Figure 3 A guide post 22 is fixed on the plug-in base 21. The guide post 22 extends forward from the mating surface of the plug-in base 21, and a guide groove 29 is correspondingly provided on the mating base 26. The shape and size of the guide groove 29 are adapted to the guide post 22.

[0030] In the assembled state, when the plug-in base 21 approaches the mating base 26, the end of the guide post 22 will enter the guide groove 29 before the plug-in terminal 25. The guide post 22 slides under the constraint of the inner wall of the guide groove 29. This tolerance-fitting guiding structure ensures the precise alignment of the plug-in base 21 and the mating base 26 during the docking process, thereby effectively avoiding collisions, bending or damage to the plug-in terminal 25 and the mating terminal 27 during docking due to improper operation or positional deviation, thus improving assembly efficiency and connection reliability.

[0031] It also includes a wire harness fixing component 3, which is separate from the wire harness connector housing 1. The wire harness fixing component 3 is sleeved on the wire harness 4 and is used to securely fix the wire harness 4 to the automotive sheet metal parts.

[0032] Reference Figure 4 The wire harness fixing assembly 3 includes a wire harness cover 31 and a pressure plate base 32. The wire harness 4 is placed between the wire harness cover 31 and the pressure plate base 32, and is clamped and fixed by the pressure between the two. This structure can adapt to wire harnesses 4 of different diameters and provides stable friction by increasing the contact area, preventing the wire harness 4 from sliding inside the wire harness fixing assembly 3. One end of the pressure plate base 32 and the wire harness cover 31 are integrally connected by a connecting piece 33. The connecting piece 33 has a certain elasticity, so that the pressure plate base 32 and the wire harness cover 31 can be elastically opened and closed to form a clamp that can be opened and closed, making it easy to quickly insert or remove the wire harness 4.

[0033] The wiring harness fixing assembly 3 also includes a fixing post 35, which extends downward from the bottom surface of the pressure plate base 32. The end of the fixing post 35 is connected to a fixing pin 36 for engaging with the reserved hole or edge of the automotive sheet metal part. The fixing pin 36 has a barb or elastic buckle structure, which can be firmly locked once it is pressed into the mounting hole of the sheet metal part to prevent it from falling out. The wiring harness fixing assembly 3 also includes a fixing limiting piece 34, which extends from the side of the pressure plate base 32. When the fixing pin 36 is engaged, the fixing limiting piece 34 can abut against the edge of the automotive sheet metal part or the adjacent structure to play a role in auxiliary positioning and preventing rotation.

[0034] Working Principle: During the connection of automotive wiring harnesses, the wire harness 4 to be connected is first passed sequentially through the wiring harness waterproof sealing gasket 23 and crimped to the plug terminal 25 and mating terminal 27. During this process, the terminal waterproof sealing ring 24 is pre-fitted onto the wire harness 4 and pushed to the root of the crimp, achieving a seal on each terminal. Subsequently, the plug base 21 with guide post 22 is aligned with the mating base 26 with guide groove 29 and plugged in. This plugging action electrically connects the plug terminal 25 and the mating terminal 27. Simultaneously, the mating sealing gasket 28 located between the mating surfaces of the two bases is effectively compressed. Thus, the wiring harness waterproof sealing gasket 23 forms the first layer of waterproofing at the entrance, the terminal waterproof sealing ring 24 forms the second layer of waterproofing at each terminal, and the mating sealing gasket 28 forms the third layer of waterproofing at the housing mating point. These three lines of defense work synergistically to comprehensively prevent moisture from entering through any potential path, achieving highly reliable multi-layered waterproofing.

[0035] To resolve the issue of wiring harness wobbling and abnormal noise, the wiring harness fixing assembly 3 is installed on the wire harness 4 near the connector housing 1. The wire harness cover 31 and the base plate 32, connected by the connecting piece 33, are opened, and the wire harness 4 is inserted and secured. Then, the wiring harness fixing assembly 3 is moved to the predetermined installation position on the automotive sheet metal part. Initial positioning is achieved using the fixing limit piece 34. Finally, the fixing pin 36 at the bottom of the fixing post 35 is pressed into the mounting hole of the sheet metal part. The locking structure of the fixing pin 36 securely locks the wiring harness fixing assembly 3 to the vehicle body, thus firmly securing the wire harness 4 as well, effectively preventing wobbling and abnormal noise caused by bumps and vibrations during vehicle operation.

Claims

1. A multi-layer waterproof connector for automotive wiring harnesses, comprising a wiring harness connector housing (1), and a plug base (21) and a mating base (26) housed inside the wiring harness connector housing (1); a plug terminal (25) is fixed on the plug base (21), and a mating terminal (27) is fixed on the mating base (26), the plug terminal (25) and the mating terminal (27) being used to connect a wire harness (4); Its features are, It also includes a wire harness waterproof sealing gasket (23), which seals and fits at the entrance where the wire harness (4) enters the wire harness connector housing (1); It also includes a terminal waterproof sealing ring (24), which surrounds and seals the root of the wire harness (4) where the plug terminal (25) and the mating terminal (27) are connected; It also includes a mating sealing gasket (28), which is pressed and sealed between the mating surfaces of the plug base (21) and the mating base (26).

2. The multi-waterproof connector for automotive wiring harnesses according to claim 1, characterized in that, The plug-in base (21) is fixed with a guide post (22), and the docking base (26) is provided with a guide groove (29). The guide post (22) and the guide groove (29) slide to guide the docking of the plug-in base (21) and the docking base (26).

3. The multi-waterproof connector for automotive wiring harnesses according to claim 1, characterized in that, It also includes a wire harness fixing assembly (3) for fixing the wire harness (4) to the automotive sheet metal part, the wire harness fixing assembly (3) being independent of the wire harness connector housing (1) and sleeved on the wire harness (4).

4. The multi-waterproof connector for automotive wiring harnesses according to claim 3, characterized in that, The wire harness fixing assembly (3) includes a wire harness cover (31) and a pressure plate base (32), and the wire harness (4) is clamped and fixed between the wire harness cover (31) and the pressure plate base (32).

5. The multi-waterproof connector for automotive wiring harnesses according to claim 4, characterized in that, The pressing base plate (32) and one end of the wire harness cover (31) are integrally connected by a connecting piece (33). The connecting piece (33) allows the pressing base plate (32) and the wire harness cover (31) to be elastically opened and closed to accommodate the wire harness (4).

6. The multi-waterproof connector for automotive wiring harnesses according to claim 4, characterized in that, The wiring harness fixing assembly (3) also includes a fixing post (35) extending downward from the bottom surface of the pressure plate (32), and the end of the fixing post (35) is connected to a fixing pin (36) for snapping onto the automotive sheet metal parts.

7. The multi-waterproof connector for automotive wiring harnesses according to claim 6, characterized in that, The wire harness fixing assembly (3) also includes a fixing limiting piece (34), which extends from the side of the pressure plate (32) and is used to assist in positioning when the fixing pin (36) is engaged.

8. The multi-waterproof connector for automotive wiring harnesses according to claim 2, characterized in that, It also includes a wire harness connection assembly (2), which is composed of the plug-in base (21), the docking base (26), the plug-in terminal (25), the docking terminal (27), the wire harness waterproof sealing gasket (23), the terminal waterproof sealing ring (24), the docking sealing gasket (28), the guide post (22) and the guide groove (29).

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