Wire harness and wire harness assembly

Abstract

The utility model discloses a wire harness and a wire harness assembly, and relates to the technical field of wire harness connection. The wire harness comprises a lead, a terminal and a rubber wrapping body. The lead comprises one or more strands of wire cores; the terminal is riveted to the head end and / or the tail end of the wire and comprises a crimping part and a connecting part which are connected with each other, the crimping part comprises a first crimping section, a second crimping section and an accommodating cavity formed by crimping the first crimping section and the second crimping section, and the wire core extends into the accommodating cavity; and the glue wrapping body is wrapped on the crimping part. By adopting the technology provided by the utility model, better applicability can be shown when a waterproof path is blocked, and excellent waterproofness, sealing performance and reliability are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wiring harness connection, specifically relates to a wiring harness and wiring harness assembly. BACKGROUND

[0002] The connection part of the cable and the electrical element is the key part of waterproof treatment, liquid is easy to form a water immersion path along the exposed wire core cluster of the external connector (the part of the insulated wire exposed from the sheath), thereby immersed into the electrical element, causing the electrical element failure, such as immersed into the circuit board to corrode the circuit board copper foil. At present, the main waterproof measures are mainly as follows: after stripping the outer rubber sleeve of the wiring harness, a sealing interface is formed between the exposed wire core cluster by artificial soldering filling, and then a heat shrink tube is connected.

[0003] However, due to poor tin solder wettability, the reliability and stability are low due to manual operation, and the heat shrink tube needs to be set according to each object of the cable, resulting in high complexity of the above process. Based on this, the Chinese invention patent document (CN108879506B) discloses a water blocking structure of a cable and a wiring harness, by configuring a circular ring (short cylinder) adhesive around the two power lines and the two signal lines, setting a heat shrink tube, using heating to shrink the resin tube and melt the circular ring adhesive, thereby filling the gap between the insulated wires. But the invention patent is mainly applied to the barrier waterproof of the branch part of the cable wiring harness, when it is used for connecting the electrical element (such as connector) and the cable, the corresponding structure of the connector connected with the crimping type, welding type or plug-in type structure is still needed. UTILITY MODEL CONTENTS

[0004] The utility model provides a wiring harness and wiring harness assembly to solve the problem of high process complexity of blocking the water path of the bare wire cluster in the cable in the prior art.

[0005] To solve the above technical problems, the utility model adopts the technical scheme to provide a wiring harness, which comprises a wire, a terminal and a rubber wrapping body.

[0006] The wire comprises one or more wire cores; the terminal is riveted to the first end and / or the last end of the wire, and comprises a crimping part and a connecting part connected to each other, the crimping part comprises a first crimping section and a second crimping section and a containing cavity formed by the first crimping section and the second crimping section, wherein the wire core extends into the containing cavity; and the rubber wrapping body covers the crimping part.

[0007] The technical scheme provided by the utility model has the beneficial effects compared with the prior art:

[0008] The terminal is provided at the leading end or the trailing end of the wire for electrical connection with an external connector, wherein the crimping part of the terminal is formed into a cylindrical structure by the first crimping section and the second crimping section under corresponding crimping dies, and the wire core extends between the first crimping section and the second crimping section, so that the first crimping section and the second crimping section can be crimped together when crimping, and the connection between the wire core and the terminal is more compact, and no gap is left between the wire core (bare wire cluster) and the crimping part. In addition, the rubber coating is wrapped around the crimping part to form a sealing layer, further ensuring the sealing effect of the crimping part, effectively preventing moisture from entering the wire core.

[0009] Compared with the current conventional tin soldering process, the above wire harness structure has lower process complexity, can be combined with the crimping die to realize fast operation, can reduce pollution caused by the tin soldering process while ensuring the waterproofness of the wire harness, and can exhibit better applicability in the waterproof path of the connection of electrical elements, and has excellent waterproofness, sealing, and reliability.

[0010] In some embodiments, the terminal is further provided with one or more grooves, which are arranged around the crimping part and located on the outer surfaces of the first crimping section and the second crimping section. Further, the rubber coating is also filled in the accommodation chamber and at least partially overflowed into the grooves, wherein the rubber coating is a thermoplastic material.

[0011] By arranging the grooves on the outer surface of the crimping part, the contact area between the rubber coating and the crimping part can be increased, so as to improve the adhesion between the rubber coating and the crimping part, and the sealing of the terminal of the wire harness is ensured. The rubber coating is a thermoplastic material, and the rubber coating is formed based on the sealing of the crimping part by the rubber coating process, that is, the double sealing of the exposed wire core of the wire harness is realized by crimping and rubber coating.

[0012] In some embodiments, the rubber coating includes a first heat shrink tube, wherein the inner wall of the first heat shrink tube is coated with an adhesive. When the rubber coating process is not used, the first heat shrink tube with the adhesive is used to sleeve the crimped crimping part, and the sealing layer formed after the first heat shrink tube is heated and shrunk can ensure the waterproof effect of the terminal.

[0013] Further, the terminal and the wire connection part are coated with a three-proofing glue "moisture-proof, mildew-proof, and salt-fog-proof" glue, and the three-proofing glue is brushed at the gap between the wire and the crimping part, so as to realize the double sealing effect on the basis of the first heat shrink tube.

[0014] In some embodiments, the wire further comprises an insulating sheath covering the core and a barrier section for stripping the insulating sheath to expose the core; wherein the cores in the barrier section are welded to each other to form a compact section. Further, the barrier section is further provided with a second heat shrink tube for covering the compact section; wherein the inner wall of the second heat shrink tube is coated with an adhesive.

[0015] With the above technical solution, the barrier section and the compact section are arranged in the middle section of the wire (any section of the wire except the first end and the last end), wherein the compact section is welded by the ultrasonic welding machine to the internal core (bare wire cluster). The second heat shrink tube is sleeved on the compact section to realize the heat curing sealing of the section, and the waterproof effect of IPX7 level can be achieved.

[0016] In some embodiments, the depth of the groove is 0.08mm to 0.12mm, wherein the groove is located on the side of the crimping part facing the wire. With the above technical solution, when the encapsulation process is used, the above groove depth performs better in sealing and connection tightness.

[0017] In some embodiments, the compression amount of the crimping part is 75% to 85%. With the above technical solution, the corresponding crimping die is used to crimp the first crimping section and the second crimping section, and when the compression amount is 75% to 85%, the waterproofness and sealing performance are better.

[0018] In some embodiments, the application further provides a wire harness assembly comprising the wire harness and the connector described above, and the connecting part of the wire harness is used for plugging into the connector.

[0019] With the above technical solution, when the wire harness is plugged into the connector through the terminal, the connecting part of the terminal can be bent to be tightly connected with the connector. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings, wherein:

[0021] Figure 1 is a three-dimensional structure schematic diagram of an embodiment of a wire harness provided by the present application;

[0022] Figure 2 is a partial structure schematic diagram of an embodiment of a wire harness provided by the present application;

[0023] Figure 3 This is a cross-sectional view of an embodiment of a wire harness provided by this utility model. Figure 1 ;

[0024] Figure 4 This is a three-dimensional structural schematic diagram of an embodiment of a crimping part for a wire harness provided by this utility model;

[0025] Figure 5 This is a three-dimensional structural schematic diagram of an embodiment of a terminal for a wire harness provided by this utility model;

[0026] Figure 6 This is a partial structural schematic diagram of an embodiment of a terminal for a wire harness provided by this utility model;

[0027] Figure 7 This is a partial structural schematic diagram of an embodiment of the blocking section of a wire harness provided by this utility model;

[0028] Figure 8 This is a three-dimensional structural schematic diagram of an embodiment of a wire harness assembly provided by this utility model.

[0029] In the picture:

[0030] 10. Wire; 11. Wire core; 110. Dense cross section; 12. Insulating sheath; 13. Barrier section; 130. Second heat shrink tubing; 20. Terminal; 21. Crimping part; 210. First crimping section; 211. Second crimping section; 213. Receiving chamber; 22. Connecting part; 23. Groove; 30. Coating material; 31. First heat shrink tubing; 40. Connector. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0032] See Figures 1 to 3 As shown, Figure 1 A three-dimensional structural schematic diagram of an embodiment of a wire harness provided in this application is shown; Figure 2 A partial structural schematic diagram of an embodiment of a wire harness provided in this application is shown; Figure 3 A cross-sectional view of an embodiment of a wire harness provided in this application is shown. Figure 1 .

[0033] In some embodiments, the wire harness comprises a wire, a terminal and a rubber coating. The wire comprises one or more wire cores; the terminal is riveted to the head end and / or tail end of the wire, comprising a crimping portion and a connecting portion connected to each other, the crimping portion comprising a first crimping segment and a second crimping segment and a receiving cavity formed by the first crimping segment and the second crimping segment being crimped, wherein the wire core extends into the receiving cavity; and the rubber coating is wrapped around the crimping portion.

[0034] In the embodiments of the present application, the terminal can be arranged at the head end or tail end of the wire, such as Figure 1 The terminal is arranged at the head end of the wire for connection with an external connector and can be connected by a riveting process. As an example, the crimping portion of the terminal is formed into a structure of a cylinder by the first crimping segment and the second crimping segment under corresponding crimping dies, and the wire core extends between the first crimping segment and the second crimping segment, so that the first crimping segment and the second crimping segment can be crimped together when crimped, and the connection between the wire core and the terminal is more compact, ensuring that there is no gap between the wire core (bare wire cluster) and the crimping portion. In addition, the rubber coating is wrapped around the crimping portion to form a sealing layer, further ensuring the sealing effect of the crimping portion, which can exhibit better applicability in blocking the waterproof path and has excellent waterproofness, sealing and reliability.

[0035] In combination with Figures 4 to 5 as shown, Figure 4 a three-dimensional structure schematic diagram of an embodiment of the crimping portion of a wire harness provided by the present application is shown; Figure 5 a three-dimensional structure schematic diagram of an embodiment of the terminal of a wire harness provided by the present application is shown.

[0036] In some embodiments, the terminal is further provided with one or more grooves, which are arranged around the crimping portion and located on the outer surface of the first crimping segment and the second crimping segment. As an example, the above-mentioned rubber coating is a thermoplastic material (such as TPU, silicone or PVC, etc., which is not limited in the present application), which is injected by a corresponding mold by a rubber coating process to completely fill the receiving cavity and at least partially overflow into the grooves. As shown, Figure 3 as shown, Figure 3 the shaded part in the middle represents the rubber coating.

[0037] In the embodiments of the present application, the first crimping segment and the second crimping segment of the crimping portion are connected to each other and are crimped together with the wire core in the receiving cavity. The grooves can be formed by pre-punching. In some embodiments, the depth of the groove is 0.08mm to 0.12mm. The groove is located on the side of the crimping portion facing the wire. In combination with Figure 4 as shown, the crimping portion is provided with one groove, but according to actual production needs, two or three grooves can be additionally provided to increase the contact area with the rubber coating. When the rubber coating process is used, a groove depth of 0.1mm performs better in sealing and connection tightness.

[0038] Exemplarily, the grooves are uniformly arranged around the end of the crimping part, so that the glue can be filled into the grooves in the circumferential direction, ensuring that the formed glue-wrapped structure is stable after curing. In some application scenarios, the wire harness after the glue-wrapping process can be immersed in water with a depth of 1 m for more than 30 min, and then tested for an insulation resistance greater than or equal to 100 MΩ, and no leakage is found in the air pressure test (pressure maintaining for 5 min under 0.5 MPa environment). Figure 3

[0039] By arranging the grooves on the outer surface of the crimping part, the contact area between the glue-wrapped structure and the crimping part can be increased, thereby improving the adhesion between the glue-wrapped structure and the crimping part, and ensuring the sealing performance of the terminal of the wire harness. The thermoplastic material of the glue-wrapped structure is sealed based on the glue-wrapping process on the crimping part, that is, the exposed wire core of the wire harness is double-sealed by crimping and glue-wrapping. Through the above-mentioned fully-wrapped waterproof layer, an IPX7+ level of waterproof effect can be achieved.

[0040] In some application scenarios, the adhesion strength between the glue and the terminal is greater than or equal to 5 MPa, which meets the ASTM D1002 standard. After 85°C / 85%RH damp heat aging test for 1000 hours, there is no cracking and peeling, that is, the above-mentioned structure can meet certain aging resistance.

[0041] In some embodiments, the compression amount of the crimping part is 75% to 85%. By using the above technical solution, the corresponding crimping die is used to crimp the first crimping section and the second crimping section, and when the compression amount is 75% to 85%, the waterproofness and sealing performance are better.

[0042] Referring to FIG. 1, Figure 6 FIG. 1 shows a partial structure schematic view of an embodiment of a terminal of a wire harness provided by the present application. Figure 6

[0043] In some embodiments, the glue-wrapped structure includes a first heat-shrinkable tube, wherein the inner wall of the first heat-shrinkable tube is coated with an adhesion agent. In the embodiments of the present application, when the glue-wrapping process is not used, the crimped crimping part is sleeved with the first heat-shrinkable tube with the adhesion agent, and the sealing layer formed after the first heat-shrinkable tube is heated and shrunk can ensure the waterproof effect of the terminal.

[0044] Further, the terminal and the wire connection part are coated with a three-proofing glue "moisture-proof, mildew-proof, and salt-fog-proof" glue, and the three-proofing glue is brushed at the gap between the wire and the crimping part, so as to realize a double-sealing effect on the basis of the first heat-shrinkable tube.

[0045] Referring to FIG. 1, Figure 7 FIG. 1 shows a partial structure schematic view of an embodiment of a terminal of a wire harness provided by the present application. Figure 7 FIG. 1 shows a partial structure schematic view of an embodiment of a terminal of a wire harness provided by the present application.​​

[0046] In some embodiments, the wire further comprises an insulating sheath covering the wire core and a barrier section for stripping the insulating sheath to expose the wire core; wherein the wire cores at the barrier section are welded to each other to form a compact section. Further, the barrier section is further provided with a second heat shrink tube for covering the compact section; wherein the inner wall of the second heat shrink tube is coated with an adhesive. Illustratively, the compact section can be welded by an ultrasonic welding machine, and the waterproof effect of IPX7 level can be achieved by heat setting of the second heat shrink tube.

[0047] In the embodiments of the present application, the barrier section and the compact section are arranged at the middle section of the wire (any section of the wire except the first end and the last end), wherein the compact section can be welded by an ultrasonic welding machine to the internal wire core (bare wire cluster). The second heat shrink tube is sleeved outside the compact section to achieve heat setting sealing of the section, and the waterproof effect of IPX7 level can be achieved.

[0048] Referring to Figure 8 As shown in the drawings, Figure 8 A three-dimensional structural schematic diagram of an embodiment of a wire harness assembly provided by the present application is shown.

[0049] In some embodiments, the present application further provides a wire harness assembly, comprising the wire harness and the connector as described above, and the connecting portion of the wire harness is used for plugging into the connector.

[0050] In the embodiments of the present application, when the wire harness is plugged into the connector through the terminal, the connecting portion of the terminal can be bent to be tightly connected with the connector. Illustratively, the compression direction of the compression portion can be adjusted according to the actual connection application scenario, which is not limited in the embodiments of the present application.

[0051] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, should be within the protection scope of the present application.

Claims

1. A wiring harness characterized by, The wire harness comprises: a wire comprising one or more wire cores; a terminal crimped to a head end and / or a tail end of the wire, comprising a crimping portion and a connecting portion connected to each other, the crimping portion comprising a first crimping segment and a second crimping segment and a receiving cavity formed by crimping the first crimping segment and the second crimping segment, wherein the wire cores extend into the receiving cavity; a wrapping body wrapped on the crimping portion.

2. The wire harness of claim 1, wherein, The terminal is further provided with one or more grooves, which are annularly arranged on the crimping portion and located on the outer surfaces of the first crimping segment and the second crimping segment.

3. The wire harness of claim 2, wherein, The wrapping body further fills the receiving cavity and at least partially overflows into the grooves, wherein the wrapping body is a thermoplastic material.

4. The wire harness of claim 1, wherein, The wrapping body comprises a first heat shrink tube, wherein the inner wall of the first heat shrink tube is coated with an adhesive.

5. The wire harness of claim 4, wherein, The connecting portion of the terminal and the wire is coated with a three-proofing glue.

6. The wire harness of claim 1, wherein, The wire further comprises an insulating sheath wrapped on the wire cores and a barrier segment for stripping the insulating sheath to expose the wire cores; wherein the wire cores at the barrier segment are welded to each other and form a dense cross section.

7. The wire harness of claim 6, wherein, The barrier segment is further provided with a second heat shrink tube for wrapping the dense cross section; wherein the inner wall of the second heat shrink tube is coated with an adhesive.

8. The wire harness of claim 2, wherein, The depth of the groove is 0.08mm to 0.12mm, wherein the groove is located on the side of the crimping portion facing the wire.

9. The wire harness according to any one of claims 1 to 8, characterized by The compression amount of the crimping portion is 75% to 85%.

10. A wiring harness assembly characterized by, The wire harness comprises: a wire comprising one or more wire cores; a terminal crimped to a head end and / or a tail end of the wire, comprising a crimping portion and a connecting portion connected to each other, the crimping portion comprising a first crimping segment and a second crimping segment and a receiving cavity formed by crimping the first crimping segment and the second crimping segment, wherein the wire cores extend into the receiving cavity; a wrapping body wrapped on the crimping portion. The terminal is further provided with one or more grooves, which are annularly arranged on the crimping portion and located on the outer surfaces of the first crimping segment and the second crimping segment. The wrapping body further fills the receiving cavity and at least partially overflows into the grooves, wherein the wrapping body is a thermoplastic material. The wrapping body comprises a first heat shrink tube, wherein the inner wall of the first heat shrink tube is coated with an adhesive. The connecting portion of the terminal and the wire is coated with a three-proofing glue. The wire further comprises an insulating sheath wrapped on the wire cores and a barrier segment for stripping the insulating sheath to expose the wire cores; wherein the wire cores at the barrier segment are welded to each other and form a dense cross section. The barrier segment is further provided with a second heat shrink tube for wrapping the dense cross section; wherein the inner wall of the second heat shrink tube is coated with an adhesive. The depth of the groove is 0.08mm to 0.12mm, wherein the groove is located on the side of the crimping portion facing the wire. The compression amount of the crimping portion is 75% to 85%. The wire harness comprises: a wire comprising one or more wire cores; a terminal crimped to a head end and / or a tail end of the wire, comprising a crimping portion and a connecting portion connected to each other, the crimping portion comprising a first crimping segment and a second crimping segment and a receiving cavity formed by crimping the first crimping segment and the second crimping segment, wherein the wire cores extend into the receiving cavity; a wrapping body wrapped on the crimping portion. The terminal is further provided with one or more grooves, which are annularly arranged on the crimping portion and located on the outer surfaces of the first crimping segment and the second crimping segment. The wrapping body further fills the receiving cavity and at least partially overflows into the grooves, wherein the wrapping body is a thermoplastic material. The wrapping body comprises a first heat shrink tube, wherein the inner wall of the first heat shrink tube is coated with an adhesive. The connecting portion of the terminal and the wire is coated with a three-proofing glue. The wire further comprises an insulating sheath wrapped on the wire cores and a barrier segment for stripping the insulating sheath to expose the wire cores; wherein the wire cores at the barrier segment are welded

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