A bending-resistant wire harness connection line

Abstract

The utility model discloses a kind of bending-resistant wire harness connecting wires, including wire harness unit, the wire harness unit outside is provided with three element ethylene-propylene rubber, and three element ethylene-propylene rubber is installed in the inside of sleeve pipe, the sleeve pipe outer periphery is fixedly provided with several groups of circular bubble tube, and the inside of circular bubble tube is provided with several groups of cross-shaped support rod piece, the circular bubble tube is fixedly set in flame-retardant layer inside, and multiple separation support strips are fixedly arranged on the surface of the outside of flame-retardant layer at equal angles, the end of separation support strip away from flame-retardant layer is fixedly provided with compression-resistance elastic protective layer, and the compression-resistance elastic protective layer and flame-retardant layer are divided into multiple filling cavities by several groups of separation support strips, the utility model is provided with three element ethylene-propylene rubber, sleeve pipe and circular bubble tube fixedly provided with outer periphery, and cross-shaped support rod piece is set in the inside of circular bubble tube, effectively enhance the overall structural strength of wire harness connecting wire, so that it can withstand more bending times without being easily damaged.

Description

Technical Field

[0001] This utility model mainly relates to the field of wire harness connection technology, specifically a bend-resistant wire harness connection. Background Technology

[0002] Wire harnesses are a set of cables, terminals, connectors, and other components bundled together for transmitting signals and power between equipment. They play a crucial role in transmitting signals and power in various electronic devices, automotive, aerospace, and communications fields. However, traditional wire harnesses are prone to damage, such as breakage or poor signal transmission, when subjected to complex operating environments, especially frequent bending or external impacts.

[0003] For example, patent application CN202222747669.X designs a wire harness connector comprising a connector body, end-sealing components, and an external plug-in component. This device achieves end-sealing protection through the end-sealing components, enhancing the connector's environmental resistance. However, despite the aforementioned protective design, the wire harness connector's structural strength and durability may still be affected after being subjected to continuous external force or repeated bending, making it prone to bending and breakage, thus impacting the connector's stability and reliability. Therefore, a bend-resistant wire harness connector is proposed. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing wire harness connectors are too simplistic. It mainly provides a bend-resistant wire harness connector to solve the problem mentioned in the background that existing wire harness connectors are prone to damage under frequent bending or external impact.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A bend-resistant wire harness connector includes a wire harness unit. The wire harness unit is externally covered with EPDM rubber, which is installed inside a sleeve. Several sets of circular bubble tubes are fixedly arranged around the outer periphery of the sleeve, and several sets of cross-shaped support rods are provided inside the circular bubble tubes. The circular bubble tubes are fixedly arranged inside a flame-retardant layer, and multiple dividing support strips are fixedly arranged at equal angles on the outer surface of the flame-retardant layer. A compressive elastic protective layer is fixedly arranged at the end of the dividing support strip away from the flame-retardant layer, and the compressive elastic protective layer and the flame-retardant layer are divided into multiple filling cavities by the several sets of dividing support strips.

[0007] Preferably, the wire harness unit is provided in three groups, and the three groups of wire harness units are arranged in a triangular distribution. The wire harness unit includes a wire core unit, and an insulating film is provided on the outside of the wire core unit. The insulating film is located inside the vulcanized rubber layer, and nylon filaments for enhancing its mechanical properties are provided inside the vulcanized rubber layer.

[0008] Preferably, the inner surface of the EPDM rubber has three protrusions integrally formed, and the EPDM rubber contacts the outer surface of the wire harness unit through the three protrusions integrally formed on the inner surface. A foam filling layer is filled between the wire harness unit and the EPDM rubber, and a buffer cavity is provided inside the EPDM rubber.

[0009] Preferably, a tensile reinforcing rope is provided at the center of the EPDM rubber.

[0010] Preferably, the hardness of the support rod is higher than that of the circular bubble tube, and the support rod includes a longitudinal plate and a transverse plate perpendicular to the longitudinal plate, and a steel strip is provided inside the transverse plate along the length direction.

[0011] Preferably, the filling cavity is filled with isoprene rubber.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] By incorporating EPDM rubber, a sleeve, and a circular bubble tube fixed around the periphery, and by setting a cross-shaped support rod inside the circular bubble tube, the overall structural strength of the wire harness connection line is effectively enhanced, enabling it to withstand more bending cycles without easily being damaged. The EPDM rubber on the outside of the wire harness unit not only provides an additional protective layer, but also further enhances the mechanical strength through its internal buffer cavity and foam filling layer. At the same time, the combined design of the circular bubble tube and the support rod also improves the durability of the connection line.

[0014] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall front cross-sectional structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the positional relationship between the wire harness unit and the EPDM rubber of this utility model;

[0017] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0018] Numbering on the map:

[0019] 1. Wiring harness unit; 101. Vulcanized rubber layer; 2. EPDM rubber; 3. Sleeve; 4. Circular bubble tube; 401. Support rod; 4011. Longitudinal plate; 4012. Transverse plate; 5. Flame retardant layer; 501. Separating support strip; 6. Compression-resistant elastic protective layer. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Please refer to the appendix carefully. Figures 1-3 A bend-resistant wire harness connector, wherein the wire harness unit 1 is provided with EPDM rubber 2 on the outside and the EPDM rubber 2 is installed inside the sleeve 3.

[0024] Specifically, the outer periphery of the sleeve 3 is fixedly surrounded by several sets of circular bubble tubes 4, and the inside of the circular bubble tubes 4 is provided with several sets of cross-shaped support rods 401. The circular bubble tubes 4 are fixedly installed inside the flame-retardant layer 5. The flame-retardant layer 5 is made of flame-retardant polyvinyl chloride material, and multiple dividing support strips 501 are fixed at equal angles on the outer surface of the flame-retardant layer 5. The end of the dividing support strip 501 away from the flame-retardant layer 5 is fixedly provided with a compressive elastic protective layer 6, and the compressive elastic protective layer 6 and the flame-retardant layer 5 are divided into multiple filling cavities by several sets of dividing support strips 501. The filling cavities are filled with isoprene rubber.

[0025] To further explain, sleeve 3 is made of silicone rubber hose. Silicone rubber has high flexibility and elasticity, good low temperature resistance and heat resistance, and still has elasticity in the range of -55 degrees and 180 degrees.

[0026] To further explain, isoprene rubber, as a highly elastic material, is filled in the filling cavity between the partition support bars 501, which can effectively enhance the structural stability of the entire connecting line. Isoprene rubber can reduce the impact of bending on the internal structure of the connecting line, thereby extending the service life of the connecting line. Isoprene rubber has good flexibility and resilience, which allows the connecting line to maintain good shape and performance after undergoing multiple bends.

[0027] In this embodiment, as Figure 1 and Figure 2 As shown, the wire harness unit 1 is provided in three groups, and the three groups of wire harness units 1 are arranged in a triangular distribution. The wire harness unit 1 includes a wire core unit, and an insulating film is provided on the outside of the wire core unit. The insulating film can be made of polyethylene material. The insulating film is located inside the vulcanized rubber layer 101, and nylon filaments are provided inside the vulcanized rubber layer 101 to enhance its mechanical properties.

[0028] With the above structure, the wire harness unit 1 is triangularly distributed. This layout enhances the structural stability of the entire wire harness connection line. The triangular distribution can effectively disperse external forces and prevent damage caused by excessive force at a single point, thereby improving the overall durability of the connection line. The presence of the insulating film ensures electrical isolation between the wire cores, preventing current short circuits and signal interference, thus ensuring the stability and reliability of signal transmission. The vulcanized rubber layer 101 not only provides additional protection, but also enhances the tensile and compressive strength of the wire harness unit 1 through its elastic properties. In addition, the nylon filaments set inside the vulcanized rubber layer 101 further enhance its mechanical properties, making the wire harness unit 1 less prone to damage when subjected to external impact or bending.

[0029] In this embodiment, as Figure 1 and Figure 2 As shown, the inner surface of the EPDM rubber 2 has three protrusions integrally formed, and the EPDM rubber 2 contacts the outer surface of the wire harness unit 1 through the three protrusions integrally formed on the inner surface. A foam filling layer is filled between the wire harness unit 1 and the EPDM rubber 2, and a buffer cavity is provided inside the protrusions of the EPDM rubber 2. A tensile reinforcing rope is provided at the center of the EPDM rubber 2.

[0030] Through the above structure, the foam filling layer between the wire harness unit 1 and the EPDM rubber 2, as well as the buffer cavity set inside the EPDM rubber 2, together constitute a multi-layer buffer structure. This structure can absorb and disperse external impact forces, reducing damage to the wire harness connection line when bent or subjected to external impact. The tensile reinforcing rope set at the center of the EPDM rubber 2 improves the tensile strength of the entire wire harness connection line. The tensile reinforcing rope can be made of nylon fiber material.

[0031] In this embodiment, as Figure 1 andFigure 3 As shown, the hardness of the support rod 401 is higher than that of the circular bubble tube 4. The support rod 401 includes a longitudinal plate 4011 and a transverse plate 4012 perpendicular to the longitudinal plate 4011, and a steel strip is provided in the transverse plate 4012 along the length direction.

[0032] Through the above structure, the design of the support rod 401 enables it to effectively resist external pressure and bending force, thereby enhancing the structural strength of the entire wire harness connection line. The steel strip set inside the cross plate 4012 further improves the bending resistance and service life of the support rod 401.

[0033] The assembly process of a bend-resistant wire harness connector is as follows:

[0034] Materials to be prepared: First, prepare wire harness unit 1, EPDM rubber 2, sleeve 3, round bubble tube 4, support rod 401, flame retardant layer 5, separation support strip 501, compressive elastic protective layer 6, and filler material isoprene rubber and all other necessary materials.

[0035] Processing of wire harness unit 1: Wrap an insulating film around the outside of the wire core unit, then wrap a vulcanized rubber layer 101 around the outside of the insulating film, and add nylon filaments inside the vulcanized rubber layer 101 to enhance its mechanical properties (nylon filaments are added directly during the preparation of the vulcanized rubber layer 101. The nylon filaments are prepared according to the predetermined length and quantity, mixed with the vulcanized rubber raw material, and the mixed raw material is kneaded to ensure that the nylon filaments are evenly distributed in the vulcanized rubber. Through extrusion, molding and other molding processes, the vulcanized rubber raw material mixed with nylon filaments is made into the required vulcanized rubber layer 101. The vulcanized rubber layer 101 after molding is vulcanized to enhance its mechanical properties and stability). After processing, the three sets of wire harness units 1 are arranged in a triangular distribution to enhance the overall structural stability, and a tensile reinforcing rope is set at the center position of the three sets of wire harness units 1.

[0036] Installation of EPDM rubber 2: Three protrusions are integrally formed on the inner surface of EPDM rubber 2, and these three protrusions tightly wrap around the outer surface of the wire harness unit 1. EPDM rubber 2 is wrapped around the outer surface of the wire harness unit 1 using extrusion molding technology. Then, a foam filling layer is filled between the wire harness unit 1 and EPDM rubber 2 to increase the cushioning effect. At the same time, a buffer cavity is set inside EPDM rubber 2.

[0037] Installation of sleeve 3 and circular bubble tube 4: Install the wire harness unit 1 wrapped with EPDM rubber 2 into the sleeve 3, and then evenly fix several sets of circular bubble tubes 4 around the outer periphery of the sleeve 3. Pre-install cross-shaped support rods 401 inside the circular bubble tubes 4 to ensure that the support rods 401 are firm and evenly distributed.

[0038] Installation of flame retardant layer 5 and partition support strip 501: The sleeve 3 with the fixed circular bubble tube 4 is wrapped around the inside of the flame retardant layer 5. Then, multiple partition support strips 501 are fixedly installed at equal angles on the outer surface of the flame retardant layer 5 to support the subsequent compressive elastic protective layer 6.

[0039] The compressive elastic protective layer 6 and the filling cavity are filled: The compressive elastic protective layer 6 is fixed to the end of the partition support strip 501 away from the flame retardant layer 5. The partition support strip 501 divides the compressive elastic protective layer 6 and the flame retardant layer 5 into multiple filling cavities. Before installing the compressive elastic protective layer 6, isoprene rubber can be inserted into these filling cavities. After the filling cavities are filled, the compressive elastic protective layer 6 can be extruded on the outside. This process is usually achieved by extrusion molding technology to ensure that the compressive elastic protective layer 6 is tightly attached to the flame retardant layer 5 and the partition support strip 501.

[0040] Appearance treatment and labeling: Clean and remove excess filler material or impurities generated during the assembly process, clean the surface of the connecting wires to ensure a neat appearance, and finally label the wire harness connecting wires with necessary information such as model, specifications, and production date.

[0041] Quality Inspection and Testing: A comprehensive quality inspection is conducted on the assembled wire harness connectors, including appearance quality, electrical performance, and bending resistance. Electrical performance tests are performed to ensure that signal transmission stability and resistance values ​​meet requirements. Bending resistance tests are also conducted to verify the connectors' resistance to bending and durability.

[0042] This utility model proposes a bend-resistant wire harness connector. By setting up EPDM rubber 2, sleeve 3, and a circular bubble tube 4 fixedly surrounding the outer periphery, and setting a cross-shaped support rod 401 inside the circular bubble tube 4, the overall structural strength of the wire harness connector is effectively enhanced, enabling it to withstand more bends without being easily damaged. The EPDM rubber 2 outside the wire harness unit 1 not only provides an additional protective layer, but also further reduces the impact of bending on the internal structure of the connector through its internal buffer cavity and foam filling layer. At the same time, the combined design of the circular bubble tube 4 and the support rod 401 also improves the durability of the connector. The setting of the flame-retardant layer 5 enables the connector to effectively prevent the spread of fire in extreme situations such as fire, improving the safety of the equipment. The multi-layer protective structure design protects the wire harness unit 1 from interference and damage from the external environment, thereby improving the stability and reliability of signal transmission.

[0043] The utility model has carried out the exemplary description to the utility model in the above-mentioned combination drawing, obviously the utility model concrete realization is not limited by above-mentioned mode, only if the method conception and technical scheme of the utility model have been used to carry out this kind of non-essential improvement, or the conception and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A bend-resistant wire harness connector, comprising a wire harness unit (1), characterized in that: The wire harness unit (1) is provided with EPDM rubber (2) on the outside, and the EPDM rubber (2) is installed inside the sleeve (3). The sleeve (3) is fixedly surrounded by several sets of circular bubble tubes (4), and the circular bubble tubes (4) are provided with several sets of cross-shaped support rods (401) inside. The circular bubble tubes (4) are fixedly installed inside the flame retardant layer (5), and multiple partition support strips (501) are fixed at equal angles on the outer surface of the flame retardant layer (5). The end of the partition support strip (501) away from the flame retardant layer (5) is fixedly provided with a compressive elastic protective layer (6), and the compressive elastic protective layer (6) and the flame retardant layer (5) are divided into multiple filling cavities by several sets of partition support strips (501).

2. The bend-resistant wire harness connector according to claim 1, characterized in that: The wire harness unit (1) is provided in three groups, and the three groups of wire harness units (1) are arranged in a triangular distribution. The wire harness unit (1) includes a wire core unit, and an insulating film is provided on the outside of the wire core unit. The insulating film is located inside the vulcanized rubber layer (101), and nylon filaments for enhancing its mechanical properties are provided inside the vulcanized rubber layer (101).

3. The bend-resistant wire harness connector according to claim 1, characterized in that: The inner surface of the EPDM rubber (2) is integrally formed with three protrusions, and the EPDM rubber (2) contacts the outer surface of the wire harness unit (1) through the three protrusions integrally formed on the inner surface. A foam filling layer is filled between the wire harness unit (1) and the EPDM rubber (2), and a buffer cavity is provided inside the EPDM rubber (2).

4. The bend-resistant wire harness connector according to claim 1, characterized in that: A tensile reinforcing rope is provided at the center of the EPDM rubber (2).

5. The bend-resistant wire harness connector according to claim 1, characterized in that: The hardness of the support rod (401) is higher than that of the circular bubble tube (4). The support rod (401) includes a longitudinal plate (4011) and a transverse plate (4012) perpendicular to the longitudinal plate (4011), and a steel strip is provided in the transverse plate (4012) along the length direction.

6. The bend-resistant wire harness connector according to claim 1, characterized in that: The filling cavity is filled with isoprene rubber.

Images