A junction box for automobile wiring harness

Abstract

The utility model provides a kind of junction box for automobile wiring harness, it is related to the technical field of automobile wiring harness, including junction box, is equipped with multiple groups of mounting holes in the periphery of junction box;Still include reinforcing mechanism, the reinforcing mechanism includes fixed cylinder, the fixed cylinder is arranged in mounting hole and is fixedly connected with mounting hole, multiple groups of inclined plane sliding slot are arranged in the inner wall of fixed cylinder, the first circular ring is fixedly covered on the outer wall of fixed cylinder, the one end of the inner wall of fixed cylinder is connected with threaded sleeve by thread, the other end of threaded sleeve is connected with hexagonal sleeve, the second circular ring is fixedly covered on the outer wall of threaded sleeve, the junction box for automobile wiring harness provided by the utility model solves the problem that wiring harness and junction box direct insertion type connection are not firm in prior art.

Description

Technical Field

[0001] This utility model relates to the field of automotive wiring harness technology, and more specifically, it relates to a junction box for automotive wiring harnesses. Background Technology

[0002] In existing automotive wiring harness junction box designs, the connection between the wiring harness and the junction box generally adopts a simple direct-insertion structure. This involves directly inserting the connector or terminal at the end of the wiring harness into a pre-set socket or slot within the junction box, relying on the friction between the socket and the connector to achieve initial connection and fixation. However, this direct-insertion connection method has a significant problem of unreliable fixation. After the wiring harness is inserted into the junction box, there is a lack of effective secondary locking or reinforcement measures. The connection mainly relies on the interference fit of the connector itself or the elastic clamping of simple clips. This fixing method has relatively weak pull-out resistance and vibration resistance. During actual vehicle operation, engine vibration, road bumps, and temperature changes can cause significant damage. Thermal expansion and contraction, as well as acceleration and deceleration during vehicle operation, will generate continuous dynamic loads on the connection points of the wiring harness and junction box. Repeated vibration, impact, and alternating stress will gradually weaken the friction between the connectors and the clamping force of the clips, causing the connection between the wiring harness and the junction box to loosen. This is especially true for junction boxes located in harsh vibration environments such as engine compartments and near chassis suspension systems, where direct-plug connections are more prone to loosening after long-term use. Once the wiring harness becomes loose, the contact resistance will increase. This can lead to increased voltage drop, affecting the normal operation of electrical equipment, or even poor contact causing electrical faults or even arcing at the contact surface, resulting in burning and damage to the junction box.

[0003] Furthermore, during car maintenance, technicians inevitably come into contact with various wiring harnesses and junction boxes when working in the engine compartment or inside the vehicle. Direct-plug connections that lack secure locking can easily come loose due to accidental pulling or collisions. This not only increases the difficulty and time cost of maintenance work, but may also cause intermittent faults in the vehicle's electrical system due to poor contact after the wiring harness comes loose. Such faults are often difficult to diagnose and locate, causing a lot of trouble for vehicle users. Utility Model Content

[0004] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a junction box for automotive wiring harnesses to solve the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A junction box for automotive wiring harnesses includes a junction box with multiple sets of mounting holes around its perimeter; it also includes a reinforcing mechanism, which includes a fixing cylinder disposed within and fixedly connected to the mounting holes. The inner sidewall of the fixing cylinder has multiple sets of inclined sliding grooves, and a first ring is fixedly sleeved on the outer sidewall of the fixing cylinder. One end of the inner sidewall of the fixing cylinder is threadedly connected to a threaded sleeve, and the other end of the threaded sleeve is connected to a hexagonal sleeve. A second ring is fixedly sleeved on the outer sidewall of the threaded sleeve.

[0006] Preferably, a push spring is sleeved on the outer wall of the fixed cylinder. A first thrust bearing is provided between one end of the push spring and the side wall of the first ring, and between the other end of the push spring and the side wall of the second ring. The axial preload of the push spring applies a continuous clamping force to the threaded sleeve. The provision of the first thrust bearings at both ends ensures the reliable transmission of the push spring preload while avoiding the rotation of the push spring by the rotating parts. This effectively prevents the threaded connection from loosening due to vibration and ensures that the reinforcement mechanism maintains a reliable locked state during long-term vehicle operation.

[0007] Preferably, a slider is slidably connected within the inclined groove, and each set of sliders has two sets of limiting rods on its inner sidewall. The sliding of the slider within the inclined groove effectively converts the radial tightening motion into axial thrust. The setting of the two sets of limiting rods provides dual-point limiting protection for the tightening stroke of the slider, preventing the mechanism from jamming or the wiring harness from being damaged by excessive rotation, thus ensuring the safety and reliability of the reinforcement mechanism.

[0008] Preferably, each set of sliders has three sets of abutment springs on its inner sidewall, and the other end of each abutment spring is connected to an abutment plate. By configuring three sets of abutment springs in each set of sliders to drive three abutment plates, multi-point circumferential uniform clamping of the wire harness is achieved. The elastic drive of the abutment springs allows the abutment plates to adjust the abutment force and contact area according to the difference in the outer diameter of the wire harness.

[0009] Preferably, a connecting spring is connected to one end face of the slider, and a retaining ball is connected to the other end of the connecting spring. The elastic connection of the connecting spring allows the retaining ball to flexibly follow the slider as it moves axially in the insertion tube and drives it to tighten or loosen radially, and to slide smoothly within the limiting groove.

[0010] Preferably, the inner sides of the threaded sleeve and the hexagonal sleeve are provided with a tube, and one end of the tube is provided with multiple sets of limiting grooves that are adapted to the ball. The ball is embedded in the limiting groove and slidably connected with the limiting groove. The axial movement of the tube is reliably transmitted to the synchronous radial tightening movement of multiple sets of sliders through the insertion and sliding cooperation of the multiple sets of limiting grooves on the tube and the corresponding ball.

[0011] Preferably, a second thrust bearing is provided between the end face of the hexagonal sleeve and the outer wall of the insertion tube, and a third thrust bearing is provided between the end face of the threaded sleeve and the other side wall of the insertion tube. The arrangement of the second and third thrust bearings decouples the movement of the rotating component from the axially stressed component, so that the rotational movement of the hexagonal sleeve and the threaded sleeve will not cause the insertion tube and its internal wiring harness to rotate.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides a junction box for automotive wiring harnesses, which has the following beneficial effects: The junction box for automotive wiring harnesses provided by this utility model solves the problem of unreliable fixation of the direct plug-in connection between the wiring harness and the junction box in the prior art through a reinforcement mechanism. Specifically, by setting multiple sets of inclined sliding grooves on the inner side wall of the fixed cylinder and cooperating with the radial tightening movement of the slider, combined with the rotation drive of the threaded sleeve and the axial pre-tightening effect of the push spring, a multi-point annular uniform clamping of the inserted wiring harness is achieved. Under the elastic drive of the abutment spring, the abutment plate can tightly fit against the outer surface of the wiring harness to form a reliable friction lock, effectively realizing an independent mechanical fixed connection between the wiring harness body and the junction box. This prevents the external tensile force, vibration load and stress borne by the wiring harness from acting directly on the terminals and plugs of the electrical contact parts, but instead distributes them to a larger contact area of ​​the wiring harness body through the mechanical clamping effect of the reinforcement mechanism. This reduces the mechanical stress concentration at the electrical connection parts, prevents damage such as loosening of the plug, and improves the pull-out resistance and vibration resistance of the wiring harness connection.

[0013] The synchronous tightening motion of multiple sliders along the inclined groove ensures uniform circumferential clamping of the wire harness, avoiding damage to the wire harness sheath and stress concentration caused by excessive force at a single point or in a localized area. The abutment plate adopts an elastic abutment spring driven design, which can adjust the abutment force according to the slight difference in the outer diameter of the wire harness. This ensures the reliability of clamping and avoids mechanical damage to the wire harness caused by excessive compression. It adapts to the fixing needs of wire harnesses of different specifications, making it more versatile and applicable. The design of the limit rod provides limit protection for the tightening stroke of the abutment plate, preventing the risk of slider jamming or abutment plate crushing the wire harness due to excessive rotation, ensuring the safe and reliable operation of the reinforcement mechanism. The multiple applications of thrust bearings decouple the motion of rotating parts from axial force-bearing parts, so that the rotation of the hexagonal sleeve and threaded sleeve will not drive the insertion tube to rotate. At the same time, the thrust bearings also make the rotation operation more effortless and smooth, improving assembly efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a junction box for automotive wiring harnesses according to this utility model; Figure 2 This is a schematic diagram of the junction box in this utility model; Figure 3 This is a schematic diagram of the reinforcement mechanism in this utility model; Figure 4 In this utility model Figure 3 A schematic diagram of the cross-sectional structure; Figure 5 In this utility model Figure 3 A schematic diagram of the exploded structure; Figure 6 This is a schematic diagram of the slider and the abutment plate in this utility model.

[0015] In the diagram: 11. Junction box; 12. Mounting hole; 21. Fixing cylinder; 22. Inclined slide groove; 23. First ring; 24. Threaded sleeve; 25. Hexagonal sleeve; 26. Second ring; 27. Push spring; 28. First thrust bearing; 29. ​​Slider; 210. Limiting rod; 211. Abutment spring; 212. Abutment plate; 213. Connecting spring; 214. Ball retainer; 215. Insert tube; 216. Limiting groove; 217. Second thrust bearing; 218. Third thrust bearing. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0018] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0019] Please see Figures 1-6A junction box for automotive wiring harnesses includes a junction box 11 with multiple sets of mounting holes 12 around its perimeter. It also includes a reinforcing mechanism comprising a fixing cylinder 21, which is fixedly connected to the mounting holes 12. The inner wall of the fixing cylinder 21 has multiple sets of inclined grooves 22. A first ring 23 is fixedly sleeved on the outer wall of the fixing cylinder 21. A threaded sleeve 24 is threaded to one end of the inner wall of the fixing cylinder 21, and a hexagonal sleeve 25 is threaded to the other end of the threaded sleeve 24. A second ring 26 is fixedly sleeved on the outer wall of the threaded sleeve 24. A push spring 27 is sleeved on the outer wall of the fixing cylinder 21. First thrust bearings 28 are provided between one end of the push spring 27 and the side wall of the first ring 23, and between the other end of the push spring 27 and the side wall of the second ring 26. A slider 29 is slidably connected inside the slide groove 22. Each set of sliders 29 has two sets of limiting rods 210 on its inner sidewall and three sets of abutment springs 211 on its inner sidewall. The other end of the abutment spring 211 is connected to an abutment plate 212. A connecting spring 213 is connected to one end face of the slider 29. The other end of the connecting spring 213 is connected to a retaining ball 214. The threaded sleeve 24 and the hexagonal sleeve 25 have an insertion tube 215 inside. One end of the insertion tube 215 has multiple sets of limiting grooves 216 that are adapted to the retaining ball 214. The retaining ball 214 is embedded in the limiting groove 216 and slidably connected to the limiting groove 216. A second thrust bearing 217 is provided between the end face of the hexagonal sleeve 25 and the outer side wall of the insertion tube 215. A third thrust bearing 218 is provided between the end face of the threaded sleeve 24 and the other side wall of the insertion tube 215.

[0020] In this utility model, the reinforcement mechanism makes the connection between the wire harness and the junction box 11 more secure. Specifically, the operator inserts the wire harness to be connected into the insertion tube 215, and then inserts it into the junction box 11 through the fixing cylinder 21. After the wire harness connection is completed, the operator can rotate the hexagonal sleeve 25 with an external tool. The hexagonal sleeve 25 drives the second ring 26 and the threaded sleeve 24 to rotate synchronously. Because the fixing cylinder 21 is fixedly connected to the mounting hole 12, the rotation of the threaded sleeve 24 will cause relative movement with the fixing cylinder 21. Figure 4As shown, because of the second thrust bearing 217 and the third thrust bearing 218, the rotation of the hexagonal sleeve 25 and the threaded sleeve 24 will not affect the insertion tube 215 set inside them. The rotation of the threaded sleeve 24 pushes the insertion tube 215 to move inside the fixed cylinder 21 through the third thrust bearing 218. The insertion tube 215 pushes multiple sets of sliders 29 to slide along the inclined slide groove 22 towards the end with the smaller diameter of the inclined slide groove 22 through the connection of the limiting groove 216 and the retaining ball 214. The design of the connecting spring 213 makes it easy for the slider 29 to drive the corresponding retaining ball 214 to slide in the limiting groove 216 when it slides along the inclined slide groove 22. As the multiple sets of sliders 29 gradually tighten, the insertion tube 215 moves inside the fixed cylinder 21. The abutment spring 211 drives the corresponding abutment plate 212 to move synchronously towards the axis of the fixed cylinder 21 until it makes tight contact with the surface of the inserted wire harness. The abutment spring 211 is compressed. When the side wall of the abutment plate 212 abuts against the limit rod 210, the wire harness can be locked. While the hexagonal sleeve 25 drives the second ring 26 to rotate, the first thrust bearing 28 will not affect the push spring 27. The push spring 27 is always in a compressed state, pressing the surface of the second ring 26. The push spring 27 is designed to be more secure when the hexagonal sleeve 25 and the threaded sleeve 24 are rotated into place without the application of external force.

[0021] When the wire harness needs to be disassembled, the operator needs to use an external tool to rotate the hexagonal sleeve 25 in the opposite direction. The hexagonal sleeve 25 drives the second ring 26 and the threaded sleeve 24 to rotate in the opposite direction simultaneously. The threaded sleeve 24 drives the insertion tube 215 to move outward of the fixed cylinder 21. The insertion tube 215 drives multiple sets of sliders 29 to slide along the inclined slide groove 22 towards the end with the larger diameter of the inclined slide groove 22 through the limiting groove 216, the retaining ball 214 and the connecting spring 213. The sliders 29 drive multiple sets of abutment plates 212 to expand outward simultaneously through the abutment spring 211 until the side wall of the abutment plate 212 is no longer in close contact with the outer wall of the wire harness. At this time, the wire harness can be pulled out.

[0022] In all the solutions mentioned above, the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents. In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their electrical connection relationships and specific circuit structures will not be elaborated here. Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies, and this utility model will not elaborate on them. Of all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with essential accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and circuit connections are all existing, well-known, and mature technologies, so their electrical connection relationships and specific circuit structures will not be elaborated here.

Claims

1. A junction box for automotive wiring harnesses, comprising a junction box (11), characterized in that: The junction box (11) has multiple sets of mounting holes (12) around its perimeter; it also includes a reinforcement mechanism, which includes a fixing cylinder (21), which is located inside the mounting hole (12) and fixedly connected to the mounting hole (12). The inner side wall of the fixing cylinder (21) has multiple sets of inclined sliding grooves (22), and the outer side wall of the fixing cylinder (21) is fixedly fitted with a first ring (23). One end of the inner side wall of the fixing cylinder (21) is threadedly connected to a threaded sleeve (24), and the other end of the threaded sleeve (24) is connected to a hexagonal sleeve (25). The outer side wall of the threaded sleeve (24) is fixedly fitted with a second ring (26).

2. The junction box for automotive wiring harnesses according to claim 1, characterized in that: A push spring (27) is sleeved on the outer wall of the fixed cylinder (21). A first thrust bearing (28) is provided between one end of the push spring (27) and the side wall of the first ring (23) and between the other end of the push spring (27) and the side wall of the second ring (26).

3. A junction box for automotive wiring harnesses according to claim 2, characterized in that: The inclined groove (22) is slidably connected to a slider (29), and each set of sliders (29) has two sets of limiting rods (210) on its inner sidewall.

4. A junction box for automotive wiring harnesses according to claim 3, characterized in that: Each set of sliders (29) has three sets of abutment springs (211) on its inner sidewall, and the other end of the abutment spring (211) is connected to an abutment plate (212).

5. A junction box for automotive wiring harnesses according to claim 4, characterized in that: A connecting spring (213) is connected to one end face of the slider (29), and a ball (214) is connected to the other end of the connecting spring (213).

6. A junction box for automotive wiring harnesses according to claim 5, characterized in that: The threaded sleeve (24) and the hexagonal sleeve (25) are provided with an insert tube (215). One end of the insert tube (215) is provided with multiple sets of limiting grooves (216) that are adapted to the ball (214). The ball (214) is embedded in the limiting groove (216) and slidably connected to the limiting groove (216).

7. A junction box for automotive wiring harnesses according to claim 6, characterized in that: A second thrust bearing (217) is provided between the end face of the hexagonal sleeve (25) and the outer wall of the insertion tube (215), and a third thrust bearing (218) is provided between the end face of the threaded sleeve (24) and the other side wall of the insertion tube (215).

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