Automobile low-voltage wire harness anti-pulling branch connecting device

Abstract

The utility model relates to a kind of automobile low-voltage wire harness anti-pulling branch connecting devices, belong to automobile parts technical field.The automobile low-voltage wire harness anti-pulling branch connecting device, comprising: male head and female head, the inside plug sleeve of male head and female head has terminal;Two of the anti-pulling mechanism, two the anti-pulling mechanism is fixedly connected to the opposite end of male head and female head respectively;The anti-pulling mechanism fixedly connected with male head includes outer thread pipe, the outer thread pipe is fixedly connected to the end of male head away from female head, installation cavity is opened in the outside of outer thread pipe;Anti-pulling mechanism is slipped by screw thread cover screwing and pushes adjustment block, so that grid-shaped pressure knife is pressed into branch wire harness insulation layer;The structure uses the grid tip of pressure knife to increase wire harness surface friction and mechanical bite force, effectively disperses external pulling force, avoids that pulling force is concentrated on terminal, significantly reduces the risk that terminal is pulled out.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to an anti-pull branch connection device for automotive low-voltage wiring harnesses. Background Technology

[0002] Automotive low-voltage wiring harnesses are cable assemblies used to transmit low-voltage signals and power, primarily for connecting vehicle electrical systems, control systems, and electronic equipment. Among these, the automotive branch wiring harness connector is a key component for ensuring reliable connections at wiring harness branch points, and its design must meet requirements for electrical performance, mechanical protection, and environmental adaptability.

[0003] Currently, wire harness connectors typically connect to wire harnesses via terminals and securely lock the terminals in place using a mechanical snap-fit ​​mechanism. While this method improves the connection strength between the connector and the terminals, because the terminals and wire harness are only secured by crimping, they directly bear the tensile force when the wire harness is subjected to external tension. If the instantaneous pulling force is too great, the terminals can easily be pulled out. Utility Model Content

[0004] Therefore, it is necessary to provide an anti-pull branch connection device for automotive low-voltage wiring harnesses to address the problem of insufficient tensile strength in current automotive wiring harness connector designs.

[0005] A pull-resistant branch connection device for automotive low-voltage wiring harnesses includes:

[0006] Male and female connectors, with internal wiring terminals inserted into the male and female connectors;

[0007] Two anti-pull mechanisms are provided, and the two anti-pull mechanisms are respectively fixedly connected to the opposite ends of the male and female connectors;

[0008] The anti-pull mechanism fixedly connected to the male connector includes an externally threaded tube, which is fixedly connected to the end of the male connector facing away from the female connector. An installation cavity is provided on the outer side of the externally threaded tube, and a threaded sleeve is threadedly connected to the outer side of the externally threaded tube. An adjusting block that contacts the threaded sleeve is slidably connected inside the installation cavity. A pressure knife is fixedly connected to the end of the adjusting block facing away from the threaded sleeve, and the end of the pressure knife facing away from the threaded sleeve extends through to the inner side of the installation cavity.

[0009] In one embodiment, there are two mounting cavities, two adjusting blocks, and two pressing knives, all of which are symmetrically distributed on both sides of the axis of the external threaded pipe.

[0010] In one embodiment, the side end of the adjusting block is provided with a socket, and an elastic band is embedded inside the socket. Both ends of the elastic band pass through the socket and are fixedly connected to the mounting cavity.

[0011] In one embodiment, both ends of the elastic band are fixedly connected to a pad frame, and a screw that is threaded to an external threaded pipe is inserted into the inner side of the pad frame.

[0012] In one embodiment, the corner of the adjusting block facing away from the male end is rounded, and the center of the rounded corner is always located inside the mounting cavity.

[0013] In one embodiment, the cross-sectional shape of the adjustment block and the contact portion of the mounting cavity with the adjustment block is rectangular.

[0014] In one embodiment, the vertical cross-sectional shape of the pressure knife is grid-like, and the tip of the pressure knife faces away from the adjustment block.

[0015] Beneficial effects

[0016] The aforementioned anti-pull branch connection device for low-voltage automotive wiring harnesses uses a threaded sleeve to tighten and push an adjusting block to slide, causing a grid-shaped pressure knife to press into the insulation layer of the branch wiring harness. This structure utilizes the grid tips of the pressure knife to increase the surface friction and mechanical interlocking force of the wiring harness, effectively dispersing external pulling force, avoiding concentrated pulling force on the terminals, and significantly reducing the risk of the terminals being pulled out.

[0017] The screw-fixed pad design allows for flexible adjustment of the position of the adjusting block within the mounting cavity, enabling the pressure knife to adapt to branch wire harnesses of different diameters and insulation thicknesses. This structure enhances the versatility of the anti-pull mechanism, ensuring stable anti-pull protection for all types of wire harnesses while maintaining connection reliability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0021] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0022] Figure 4 This is a partial structural diagram of the anti-pull mechanism in this utility model.

[0023] Figure label:

[0024] 100, Male connector; 200, Female connector; 300, Terminal block; 400, Anti-pull mechanism; 410, External threaded tube; 411, Mounting cavity; 420, Threaded sleeve; 430, Adjusting block; 431, Socket; 440, Pressure knife; 450, Elastic band; 460, Washer frame; 470, Screw. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0030] The following is combined with Figures 1-4 This invention describes an anti-pull branch connection device for automotive low-voltage wiring harnesses.

[0031] In one embodiment, an anti-pull branch connection device for automotive low-voltage wiring harnesses includes:

[0032] Male connector 100 and female connector 200, both of which have internal sockets with wiring terminals 300;

[0033] Two anti-pull mechanisms 400 are fixedly connected to the opposite ends of the male head 100 and the female head 200, respectively.

[0034] The structure of male head 100 includes, but is not limited to, the following:

[0035] Housing: Made of engineering plastic injection molding, with anti-slip texture and guide grooves on the surface to ensure accurate alignment during insertion.

[0036] Pin assembly: It has multiple tin-plated copper pins embedded inside, arranged in a straight line. The pin tails are crimped with wires and then fixed by a secondary locking structure.

[0037] Anti-pull design: The outer shell has integrated elastic buckles on both sides, which form a mechanical interlock after locking with the female connector 200; a silicone sealing plug and stress relief sleeve are set at the wire outlet to distribute the force on the wire harness.

[0038] Magnetic-assisted positioning: Some high-end models have a neodymium magnet embedded on the end face of the male connector 100, which works in conjunction with the opposite polarity magnet of the female connector 200 to achieve pre-alignment.

[0039] The structure of the female connector 200 includes, but is not limited to, the following:

[0040] Socket array: Copper alloy sockets that match 100 male pins, with a double spring design to enhance contact pressure, and branch wires soldered to the end of the socket.

[0041] Locking mechanism: The inner wall is equipped with a stainless steel limit ring, which is locked to the male connector 100 by a ball buckle. It can only be separated by pressing the release button.

[0042] Waterproof sealing: The socket is filled with a liquid silicone sealing ring, which, together with the male connector 100 shell, forms an IP67 level protection.

[0043] Connection process of male connector 100 / female connector 200 to branch harness via terminal block 300:

[0044] 1. Terminal crimping: Use wire strippers to strip the insulation layer of the wire and insert the wire into the tubular terminal 300 of the corresponding specification; use crimping pliers to crimp the end of the terminal to ensure that the copper core and the terminal 300 form a molecular-level bond, and check for looseness after crimping.

[0045] 2. Installation of male connector 100: Insert the crimped pin terminals into the slots of the male connector 100 housing according to the numbers. A "click" sound indicates that the secondary locking is effective.

[0046] 3. Installation of female connector 200: Insert the socket terminal into the female connector 200 insulating base and fix it with threads or lock it with a snap.

[0047] IV. Harness Protection: Insert silicone stress-relieving sleeves at the conductor exits and secure the branch harness routes with cable ties.

[0048] The docking process between male connector 100 and female connector 200:

[0049] 1. Pre-alignment: Align the male connector 100 with the female connector 200 positioning protrusion via the guide groove on the outer shell;

[0050] 2. Insertion and locking: Insert the male head 100 to the female head 200 vertically until the elastic latches on both sides pop out and make a locking sound.

[0051] 3. Pull test: Gently pull the wire harness to confirm no displacement, and use a multimeter to check that the circuit resistance is less than 0.5Ω.

[0052] like Figure 2 , Figure 3 and Figure 4As shown, the anti-pull mechanism 400, which is fixedly connected to the male connector 100, includes an externally threaded tube 410. The externally threaded tube 410 is fixedly connected to the end of the male connector 100 facing away from the female connector 200. An installation cavity 411 is opened on the outer side of the externally threaded tube 410. A threaded sleeve 420 is threadedly connected to the outer side of the externally threaded tube 410. An adjusting block 430 that contacts the threaded sleeve 420 is slidably connected inside the installation cavity 411. A pressure knife 440 is fixedly connected to the end of the adjusting block 430 facing away from the threaded sleeve 420. The end of the pressure knife 440 facing away from the threaded sleeve 420 extends through to the inner side of the installation cavity 411. There are two installation cavities 411, two adjusting blocks 430, and two pressure knives 440. The two installation cavities 411, two adjusting blocks 430, and two pressure knives 440 are symmetrically distributed. On both sides of the axis of the external threaded tube 410; the side end of the adjusting block 430 is provided with a socket 431, and an elastic band 450 is embedded in the socket 431. Both ends of the elastic band 450 pass through the socket 431 and are fixedly connected to the mounting cavity 411; both ends of the elastic band 450 are fixedly connected to a washer frame 460, and a screw 470 that is threaded to the external threaded tube 410 is inserted into the inner side of the washer frame 460; the corner of the adjusting block 430 facing away from the male head 100 is rounded, and the center point of the rounded corner is always set inside the mounting cavity 411; the cross-sectional shape of the adjusting block 430 and the mounting cavity 411 in contact with the adjusting block 430 is rectangular; the vertical cross-sectional shape of the pressure knife 440 is grid-like, and the tip of the pressure knife 440 faces away from the adjusting block 430.

[0053] In this embodiment, when the user needs to center and position branch harnesses of different specifications, the user can select a pressure knife 440 that will not affect the normal operation of the branch harness according to the diameter of the branch harness and the thickness of the insulation layer. Then, the adjusting block 430 along with the pressure knife 440 is slid into the mounting cavity 411. Finally, the pad frame 460 along with the adjusting block 430 is fixed in the mounting cavity 411 by the screw 470.

[0054] Working principle: First, manually unscrew the threaded sleeve 420 and put it on the surface of the branch wire harness. Then, the terminal block 300 and the branch wire harness are sequentially passed through the external threaded tube 410 and connected to the corresponding male connector 100 or female connector 200. Then, the threaded sleeve 420 is threaded to the surface of the external threaded tube 410. When the threaded sleeve 420 passes through the mounting cavity 411, it presses the adjusting block 430 into the mounting cavity 411 through the rounded corner surface of the adjusting block 430. At this time, the adjusting block 430 drives the mesh-shaped pressure knife 440 to pass through the mounting cavity 411 and press into the insulation layer of the branch wire harness. The mesh-shaped pressure knife 440 structure can significantly increase the tensile strength of the branch wire harness, thereby effectively improving the overall tensile strength of the automotive low-voltage wire harness anti-pull branch connection device.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A pull-resistant branch connection device for automotive low-voltage wiring harnesses, characterized in that, include: Male connector (100) and female connector (200), wherein the male connector (100) and female connector (200) are internally fitted with terminals (300); Two anti-pull mechanisms (400) are provided, and the two anti-pull mechanisms (400) are respectively fixedly connected to the opposite ends of the male head (100) and the female head (200); The anti-pull mechanism (400) fixedly connected to the male head (100) includes an external threaded tube (410). The external threaded tube (410) is fixedly connected to one end of the male head (100) facing away from the female head (200). An installation cavity (411) is provided on the outer side of the external threaded tube (410). A threaded sleeve (420) is threadedly connected to the outer side of the external threaded tube (410). An adjusting block (430) that contacts the threaded sleeve (420) is slidably connected inside the installation cavity (411). A pressure knife (440) is fixedly connected to one end of the adjusting block (430) facing away from the threaded sleeve (420). One end of the pressure knife (440) facing away from the threaded sleeve (420) extends through to the inner side of the installation cavity (411).

2. The automotive low-voltage wiring harness anti-pull branch connection device according to claim 1, characterized in that, The number of mounting cavities (411), adjusting blocks (430) and pressing knives (440) are all two, and the two mounting cavities (411), the two adjusting blocks (430) and the two pressing knives (440) are symmetrically distributed on both sides of the axis of the external threaded pipe (410).

3. The automotive low-voltage wiring harness anti-pull branch connection device according to claim 1, characterized in that, The adjustment block (430) has a socket (431) on its side end. An elastic band (450) is embedded inside the socket (431). Both ends of the elastic band (450) pass through the socket (431) and are fixedly connected to the mounting cavity (411).

4. The automotive low-voltage wiring harness anti-pull branch connection device according to claim 3, characterized in that, Both ends of the elastic band (450) are fixedly connected to a pad frame (460), and a screw (470) that is threaded to the external threaded tube (410) is inserted into the inner side of the pad frame (460).

5. The automotive low-voltage wiring harness anti-pull branch connection device according to claim 1, characterized in that, The adjustment block (430) has a rounded corner on one end facing away from the male head (100), and the center of the rounded corner is always located inside the mounting cavity (411).

6. The automotive low-voltage wiring harness anti-pull branch connection device according to claim 1, characterized in that, The cross-sectional shape of the contact area between the adjusting block (430) and the mounting cavity (411) and the adjusting block (430) is rectangular.

7. The automotive low-voltage wiring harness anti-pull branch connection device according to claim 1, characterized in that, The vertical cross-sectional shape of the pressure knife (440) is grid-like, and the tip of the pressure knife (440) faces away from the adjustment block (430).

Images