Enclosed cable connection unit

Abstract

The utility model provides a closed cable connection unit, which comprises a core wire branch fixing piece, a gluing fixing part and a waterproof sealing sleeve, and is provided with the core wire branch fixing piece which is arranged on a plurality of core wires and is separated from one end of a sheath by a certain distance, so that the plurality of core wires extending out of the sheath can be split and fixed, and the waterproof sealing sleeve is arranged on the core wire branch fixing piece. The plurality of extended core wires are easier to arrange and connect; due to the fact that the core wire branch fixing part is provided with the gluing fixing part, the branch inclined part of the core wire generated by arranging the core wire branch fixing part can be glued and fixed, and the problem that the branch inclined part is broken or cracked is avoided; as the waterproof sealing sleeve is coated on the core wire branch fixing part, the gluing fixing part and one end of the sheath, one end of the cable can be subjected to waterproof sealing, water drops and the like are prevented from entering from a gap at the end of the cable, water is prevented from entering electric equipment, and normal operation of the electric equipment is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of cable connection components, and in particular relates to a closed cable connection unit. Background Art

[0002] Electrical equipment is usually connected to a power source through a cable. Some cables also contain control signal core wires, and the electrical equipment can also be connected to a controller, etc. through the cable. The sealing effect of one end of the existing cable that is connected to the power source and / or controller is usually poor. Specifically, the cable usually includes multiple core wires and an insulating waterproof sheath covering the outside of the core wires. At the above-mentioned end of the cable, it is necessary to expose the multiple core wires in the cable to the outside of the sheath, and then bundle the multiple core wires and connect them to the various connection terminals of the power source and / or controller. This will expose the gaps between the core wires, and external water droplets can enter the interior of the electrical equipment through the gaps, causing water ingress failure of the electrical equipment. For this end of the cable, traditional sealing methods include wrapping with waterproof tape, covering with waterproof rubber sleeves, and covering with heat shrink tubing. However, these traditional sealing methods are prone to problems with reduced waterproof performance or even failure during long-term use. For example, due to the heat generated by the energized cables during long-term use, the cables being dragged, or the vibrations caused by electrical equipment during use, waterproof tapes, waterproof rubber sleeves, etc. may be deformed, partially cracked, and deteriorate, resulting in a decrease in waterproof performance or even failure. Utility Model Content

[0003] The present invention is designed to solve the above-mentioned problem and aims to provide a cable connection unit that can achieve an effective waterproof sealing effect on one end of the cable during long-term use. The present invention adopts the following technical solutions:

[0004] The utility model provides a closed cable connection unit for waterproof sealing of one end of a cable having a sheath and multiple core wires, wherein the multiple core wires extend from one end of the sheath, and has the following technical features: the closed cable connection unit comprises: a core wire branch fixing piece, which is arranged on the multiple core wires and has a predetermined distance from one end of the sheath, and is used to bundle and fix the multiple core wires, and the portion of the core wire between the core wire branch fixing piece and one end of the sheath is a branch inclined portion; a gluing fixing portion, which is arranged on the branch inclined portion of the multiple core wires, and is used to gluing and fixing the branch inclined portion; and a waterproof sealing sleeve, which covers the outside of the core wire branch fixing piece, the gluing fixing portion and one end of the sheath.

[0005] The closed cable connection unit provided by the present invention may also have such a technical feature, wherein the core wire branch fixing piece has a plurality of fixing holes extending axially therethrough, which are used for allowing the plurality of core wires to pass through and fixing the core wires, and the inner diameter of the fixing hole is smaller than the outer diameter of the corresponding core wire.

[0006] The closed cable connection unit provided by the present invention may also have such technical features, wherein the multiple core wires include multiple power supply wires and multiple signal wires, the multiple fixing holes include multiple power supply wire fixing holes and multiple signal wire fixing holes, and on the axial cross-section of the core wire branch fixing piece, the multiple signal wire fixing holes are distributed on the edge portion of one side of the axial cross-section.

[0007] The closed cable connection unit provided by the utility model may also have such a technical feature, wherein, there are three power supply line fixing holes, and on the axial cross-section of the core wire branch fixing piece, the centers of the three power supply line fixing holes are located on the three vertices of a triangle, and one of the power supply line fixing holes is located in the middle of the axial cross-section.

[0008] The closed cable connection unit provided by the present invention may also have such a technical feature, wherein the glued fixing portion is conical, the bottom surface of the cone faces the core wire branch fixing piece, and the top of the cone faces one end of the sheath.

[0009] The closed cable connection unit provided by the present invention may also have such technical features, wherein the core wire branch fixing piece is a nitrile rubber piece, the glued fixing part is a silicone rubber piece, and the waterproof sealing sleeve is a nitrile rubber sleeve.

[0010] The closed cable connection unit provided by the present invention may also have such technical features, which also includes: a fastening ring, which is sleeved and pressed on the core wire branch fixing piece; and a fixing sleeve, which is covered on the fastening ring, the glued fixing part and one end of the sheath, and is used to fix their relative positions, and the waterproof sealing sleeve is covered on the fixing sleeve and one end of the sheath.

[0011] The closed cable connection unit provided by the present invention may also have such a technical feature, wherein the waterproof sealing sleeve has a sleeve covering part and a sheath covering part formed integrally, the sleeve covering part is covered on the fixed sleeve, the axial length of the sheath covering part is greater than the axial length of the fixed sleeve, and the sheath covering part is covered on the sheath.

[0012] The closed cable connection unit provided by the present invention may also have such technical features, wherein the sheath covering part has a sheath fixing hole for allowing the cable to pass through, the inner diameter of the sheath fixing hole is smaller than the outer diameter of the cable, the outer shape of the sleeve covering part is cylindrical, and the outer shape of the sheath covering part is conical.

[0013] The closed cable connection unit provided by the present invention may also have such technical features, wherein the fastening ring is an aluminum ring, the fixing sleeve is a polyethylene double-wall heat shrink sleeve, and the waterproof sealing sleeve is a nitrile rubber sleeve.

[0014] Function and effect of utility model

[0015] According to the closed cable connection unit of the present invention, it includes a core wire branch fixing piece, a glue fixing part and a waterproof sealing sleeve. Since the core wire branch fixing piece is arranged on multiple core wires and leaves a certain distance between the core wires and one end of the sheath, the multiple core wires extending from the sheath can be bundled and fixed, making the multiple extended core wires easier to arrange and connect; since it has the glue fixing part, the branch inclined part of the core wire generated by the arrangement of the core wire branch fixing piece can be glued and fixed, avoiding problems such as breakage or cracking of the branch inclined part; since the core wire branch fixing piece is also used to seal multiple core wires, and since it has a waterproof sealing sleeve covered on the core wire branch fixing piece, the glue fixing part and one end of the sheath, one end of the cable can be effectively waterproof sealed during long-term use, avoiding water droplets and the like from entering from the gap at that end of the cable, thereby avoiding water ingress into electrical equipment and ensuring the normal operation of electrical equipment.

[0016] As described above, the enclosed cable connection unit of the present invention can make one end of the cable easier to connect, less prone to damage, and achieve a long-term and effective waterproof seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of a cable and a closed cable connection unit in an embodiment of the present utility model;

[0018] Figure 2 This is an exploded view of the structure of the cable and the enclosed cable connection unit in the embodiment of the present utility model;

[0019] Figure 3 is a cross-sectional view of a cable in an embodiment of the present utility model;

[0020] Figure 4 This is a three-dimensional diagram of a core wire branch fixing member in an embodiment of the present utility model;

[0021] Figure 5 This is the structure of the enclosed cable connection unit during assembly in the embodiment of the utility model. Figure 1 ;

[0022] Figure 6 This is the structure of the enclosed cable connection unit during assembly in the embodiment of the utility model. Figure 2 ;

[0023] Figure 7 This is the structure of the enclosed cable connection unit during assembly in the embodiment of the utility model. Figure 3 ;

[0024] Figure 8 This is the structure of the enclosed cable connection unit during assembly in the embodiment of the utility model. Figure 4 .

[0025] Reference numerals:

[0026] Closed cable connection unit 16; core wire branch fixing piece 161; first power supply line fixing hole 1611a; second power supply line fixing hole 1611b; third power supply line fixing hole 1611c; first signal line fixing hole 1612a; second signal line fixing hole 1612b; third signal line fixing hole 1612c; fourth signal line fixing hole 1612d; fifth signal line fixing hole 1612e; sixth signal line fixing hole 1612f; glue fixing portion 162; fastening ring 163; fixing sleeve 164; waterproof sealing sleeve 165; sheath covering portion 1651; sleeve covering portion 1652; cable 20; sheath 21; first power supply line 22a; second power supply line 22b; third power supply line 22c; first signal line 23a; second signal line 23b; third signal line 23c; fourth signal line 23d; fifth signal line 23e; sixth signal line 23f. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the enclosed cable connection unit of the present invention is described in detail below with reference to embodiments and drawings.

[0028] <Example>

[0029] This embodiment provides a closed cable connection unit, which is used to perform a waterproof and sealed connection between one end of a cable and an electrical device with waterproof and sealing requirements. The electrical device can be, for example, a hub motor. One end of the cable passes through the wire hole on the motor shaft of the hub motor and enters the interior of the hub motor casing, and is connected to the motor winding inside the casing.

[0030] Figure 1 is a three-dimensional diagram of the cable and the enclosed cable connection unit in this embodiment, Figure 2 1 is a structural exploded view of the cable and the enclosed cable connection unit in this embodiment.

[0031] like Figure 1 and Figure 2 As shown, the closed cable connection unit 16 of this embodiment is provided at one end of the cable 20 for connecting to an electrical device, for achieving waterproof sealing for the end.

[0032] Figure 3 is a cross-sectional view of the cable in this embodiment.

[0033] like Figures 1 to 3 As shown, the cable 20 includes a sheath 21 and a plurality of core wires. The plurality of core wires are arranged roughly in close proximity to each other. The sheath 21 is wrapped around the outer periphery of the plurality of core wires to provide insulation and waterproofing. The sheath 21 has a certain thickness and elasticity. The plurality of core wires include a plurality of power supply wires for transmitting electrical energy and a plurality of signal wires for transmitting control signals. In this embodiment, there are three power supply wires (three-phase wires), and their outer diameters are all the same. There are six signal wires, and their outer diameters are all the same. Each core wire includes a plurality of conductor wires and an insulating layer wrapped around the outer periphery of the plurality of conductor wires. The insulating layer has a certain thickness and elasticity.

[0034] In this embodiment, the outer diameter of the cable 20 is approximately 7 mm.

[0035] For the convenience of description below, the three power supply lines are respectively referred to as first to third power supply lines 22a to 22c, and the six signal lines are respectively referred to as first to sixth signal lines 23a to 23f.

[0036] Viewed in an axial cross-section of cable 20, the centers of the three power lines are located at the vertices of a triangle, with the first power line 22a located in the center, the second power line 22b and the third power line 22c located on either side of it and in close contact with it, while the second power line 22b and the third power line 22c do not touch each other. Six signal lines are arranged radially on one side of the inner sheath 21, on either side of the first power line 22a. The centers of the second signal line 23b, the third signal line 23c, and the fifth signal line 23e are located at the vertices of an equilateral triangle, respectively. These three signal lines are in close contact with the second power line 22b and the third power line 22c, respectively. The other three signal lines are arranged in an arc-like shape around the periphery of the three signal lines in the triangle, and are generally in close contact with the three signal lines in the triangle. It can be seen that with such a core wire arrangement, there are gaps 24 of varying sizes between the power supply line and the inner wall of the sheath 21, between the second and third power supply lines and the third signal line 23c in the middle, between multiple signal lines, and between the signal lines arranged on the periphery and the sheath 21. The gap 24 extends and penetrates along the extension direction of the cable 20, and gas, water droplets, etc. can enter the interior of the electrical equipment through the gap 24. At the same time, at the end of the cable 20 connected to the electrical equipment, a portion of the sheath 21 is cut off, so that a portion of each power supply line and a portion of each signal line extend from the shortened end of the sheath 21 to the outside, and the extended portions of the power supply line and signal line are further branched and connected to the motor winding and the controller respectively, which makes it easier to expose the above-mentioned gap 24 at this end. The closed cable connection unit of this embodiment is intended to solve the above-mentioned problems.

[0037] The closed cable connection unit 16 includes a core wire branch fixing piece 161 , a fastening ring 162 , a glue fixing portion 163 , a fixing sleeve 164 and a waterproof sealing sleeve 165 .

[0038] The core wire branch fixing member 161 is used to fix and seal the relative positions of the multiple power supply wires and the multiple signal wires extending outside the sheath 21 .

[0039] Figure 4 It is a three-dimensional diagram of the core wire branch fixing member in this embodiment.

[0040] like Figure 4 As shown, the core wire branch fixture 161 is generally short cylindrical in shape, having three power line fixing holes and six signal line fixing holes. All holes extend axially through the core wire branch fixture 161 and have a circular cross-section along the axial direction. For ease of description, the three power line fixing holes are referred to as first to third power line fixing holes 1611a-1611c, and the six signal line fixing holes are referred to as first to sixth signal line fixing holes 1612a-1612f.

[0041] The three power supply line fixing holes are used for the three power supply lines to pass through respectively. When not subject to external force, the inner diameter (aperture) of the power supply line fixing hole is slightly smaller than the outer diameter of the power supply line. Therefore, after the power supply line is inserted, an interference fit can be achieved between the two, so that the inner side wall of the power supply line fixing hole and the outer peripheral surface of the power supply line are sealed.

[0042] The six signal line fixing holes are used for six signal lines to pass through respectively. Similarly, when not subject to external force, the inner diameter (aperture) of the signal line fixing hole is slightly smaller than the outer diameter of the signal line. Therefore, after the signal line is inserted, an interference fit can be achieved between the two, so that the inner wall of the signal line fixing hole and the outer peripheral surface of the signal line are sealed.

[0043] Viewed from the axial direction of the core wire branch fixing piece 161 , on one axial end face 1613 thereof, three power supply wire fixing holes are located at three corners of an equilateral triangle, wherein the first power supply wire fixing hole 1611 a is located in the middle of the end face 1613 .

[0044] In this embodiment, the core wire branch fixture 161 is made of nitrile rubber (NBR). When not subject to external forces, the core wire branch fixture 161 has an outer diameter of 10 mm and an axial length of 5 to 6 mm. The power line fixing hole has a diameter of 2.5 mm. The signal line fixing hole has a diameter of 0.8 to 1.2 mm. When assembled on one end of the cable 20, the distance between the core wire branch fixture 161 and one end of the sheath 21 is approximately 10 mm.

[0045] Figure 5 This is the structure of the enclosed cable connection unit during assembly in this embodiment. Figure 1 , Figure 6 This is the structure of the enclosed cable connection unit during assembly in this embodiment. Figure 2 , that is Figure 5 Views of the structure from different angles.

[0046] like Figure 5 and Figure 6As shown, the first to third power lines 22a-22c pass through the first to third power line fixing holes 1611a-1611c, one by one. The first power line 22a, located on one radial side of the sheath 21, passes through the first power line fixing hole 1611a in the middle, causing the branch angled portion of the first power line 22a between one end of the sheath 21 and the core wire branch fixing member 161 to tilt along direction D1 toward the central axis A1. At this position, the branch angled portions of the second power line 22b and the third power line 22c are tilted along direction D1 away from the central axis A1. Viewed from the side, the branch angled portions of the first power line 22a and the second and third power lines 22b, 22c intersect in an X-shape. After passing through the core wire branch fixing member 161, the three power lines are arranged in a triangular shape in an axial cross-section.

[0047] The first to sixth signal lines 23a to 23f pass through the first to sixth signal line fixing holes 1612a to 1612f respectively. The branch inclined portions of the multiple signal lines between one end of the sheath 21 and the core wire branch fixing piece 161 are all inclined along the D1 direction toward the direction away from the central axis A1. The inclination angles of the branch inclined portions of each signal line are different. When viewed from the side, the branch inclined portions of the signal lines on both sides of the arc-shaped arrangement are slightly staggered with the branch inclined portions of the signal lines in the middle. After passing through the core wire branch fixing piece 161, in the axial cross section, the six power supply lines are arranged in an arc shape on the outside of the three power supply lines.

[0048] It can be seen that after the core wire branch fixing member 161 is installed at one end of the cable 20, multiple core wires are fixed and branched by it, the distance between the core wires becomes larger, and the arrangement of the core wires is more regular, which is conducive to subsequent wiring.

[0049] The glued-in fixing portion 162 is positioned between the core wire branch fixture 161 and one end of the sheath 21, wrapping around and securing the inclined branch portions of the multiple core wires to prevent them from breaking or cracking. The glued-in fixing portion 162 is formed by injecting adhesive into the aforementioned location. The molded glued-in fixing portion 162 has a roughly conical shape, with the base of the cone located at the end face 163 of the core wire branch fixture 161 and the apex of the cone facing one end of the sheath 21. The molded glued-in fixing portion 162 has multiple through-holes corresponding to the aforementioned configuration of the inclined branch portions of the core wires.

[0050] Since the branched inclined parts of the multiple core wires are in the above-mentioned shape, that is, the thicker power supply wires are staggered in an X shape, the signal wires are also staggered, and there are no excessive gaps between the multiple core wires, the adhesive is not easy to drip when injected, and the position distribution of the core wires in the finally formed glued fixing part 162 is relatively uniform, and the various parts of the glued fixing part 162 are subjected to relatively uniform force.

[0051] In this embodiment, the adhesive fixing portion 162 is made of silicone rubber.

[0052] The tightening ring 163 is a short cylindrical shape, and its strength is greater than that of the core wire branch fixture 161. After the power and signal lines are inserted into the core wire branch fixture 161, it is then fitted over the core wire branch fixture 161, compressing it and further improving the waterproof seal between the power and signal lines and the core wire branch fixture 161. When not subject to external forces, the inner diameter of the tightening ring 163 is slightly smaller than the outer diameter of the core wire branch fixture 161, thus providing tight compression to the core wire branch fixture 161 after fitting. The axial length of the tightening ring 163 is approximately the same as that of the core wire branch fixture 161.

[0053] In this embodiment, the fastening ring 163 is an aluminum ring.

[0054] Figure 7 This is the structure of the enclosed cable connection unit during assembly in this embodiment. Figure 3 .

[0055] like Figure 7 As shown, after the fastening ring 163 is assembled on the core wire branch fixing member 161, the plurality of core wires are further compressed against the core wire branch fixing member 161.

[0056] The fixing sleeve 164 is used to fit over and tightly wrap around one end of the sheath 21, the glued fixing portion 162, and the outer periphery of the fastening ring 163 to further fix their relative positions. The shape of the fixing sleeve 164 corresponds to the shape of the component it wraps around.

[0057] In this embodiment, fixed sleeve 164 is a double-walled heat-shrinkable polyethylene (PE) tube, which is heated and shrunk to fit snugly around the outer circumference of the aforementioned component. After heat shrinkage, its axial length is approximately 20 mm. The figure only shows the general structure of fixed sleeve 164. In practice, after being wrapped around the aforementioned component, the heat-shrinkable tube has an arcuate shape, with one axial end turned inward to cover the edge of one axial end surface of the core wire branch fixture 161.

[0058] Figure 8 This is the structure of the enclosed cable connection unit during assembly in this embodiment. Figure 4 .

[0059] like Figure 8 As shown, after the fixing sleeve 164 is assembled, one end of the sheath 21 , the glued fixing portion 162 and the fastening ring 163 are covered in the fixing sleeve 164 , and their relative positions are fixed by the fixing sleeve 164 .

[0060] The waterproof sealing sleeve 165 is further covered on the fixed sleeve 164 and a section of the sheath 21 extending from the fixed sleeve 164 to achieve a better overall waterproof effect.

[0061] The waterproof sealing sleeve 165 is made of a waterproof material and includes an integrally formed sheath covering portion 1651 and a sleeve covering portion 1652. Sheath covering portion 1651 is designed to cover a section of the sheath 21 outside the fixed sleeve 164. It has a roughly truncated cone shape and includes a sheath fixing hole extending axially therein. When not subject to external forces, the inner diameter of the sheath fixing hole is slightly smaller than the outer diameter of the sheath 21, thereby providing a tight seal when fitted over the sheath 21. Sleeve covering portion 1652 has an axial length greater than that of the fixed sleeve 164 and is designed to completely cover the fixed sleeve 164 to further achieve a waterproof seal. It has a roughly cylindrical shape and, at its end distal from sheath covering portion 1651, has a core wire outlet for multiple core wires. It also contains a fixed sleeve accommodating cavity connected to the sheath fixing hole. The inner wall of the fixed sleeve accommodating cavity substantially conforms to the outer circumference of the fixed sleeve 164.

[0062] In this embodiment, the waterproof sealing sleeve 165 is made of nitrile rubber (NBR). After assembly, its axial length is approximately 45 mm, and the outer diameter of the sleeve covering portion 1652 is approximately 15 mm.

[0063] As shown in the structural diagram of the above assembly process, the cable connection unit 16 of this embodiment can be assembled to one end of the cable 20 according to the following process: First, each core wire is passed through the corresponding fixing hole on the core wire branch fixing member 161, and the core wire branch fixing member 161 is assembled to a predetermined distance from one end of the sheath 21 to form a Figure 5 and Figure 6 Then, the core wire branch fixing member 161 and the end of the sheath 21 is injected with adhesive to form a glued fixing portion 162; then, the core wire branch fixing member 161 is set on the fastening ring 163, forming a Figure 7 Then, at one end of the sheath 21, the glued fixing portion 162 and the outer periphery of the fastening ring 163 are covered with a fixed sleeve 164 to form a Figure 8 Finally, at the end of the sheath 21, the fixed sleeve 164 and the outer periphery of the core portion near the fixed sleeve 164 is coated with a waterproof sealing sleeve 165, forming a Figure 1 The structure shown completes the assembly of the cable connection unit 16. Afterwards, the multiple core wires extending outward from the cable connection unit 16 can be further connected to a power supply or a controller.

[0064] After assembly is complete, multiple core wires extend outward from the closed cable connection unit 16. When water droplets adhere to the extended core wire portions, the core wire branch fixing members 161 tightly seal each core wire, so the water droplets cannot slide along the core wires into the gap 24, and can only slide along the outside of the waterproof sealing sleeve 165. In addition, because the core wire portion near the end of the sheath 21 is completely covered by the glue fixing portion 162, the fixing sleeve 164, and the waterproof sealing sleeve 165, water droplets cannot reach this core wire portion. Therefore, water droplets are completely unable to enter the gap 24 in the cable 20 from this end, and the closed cable connection unit 16 achieves a closed waterproof seal for one end of the cable 20.

[0065] Functions and Effects of the Embodiments

[0066] According to the closed cable connection unit provided in this embodiment, it includes a core wire branch fixing piece, a glue fixing part and a waterproof sealing sleeve. Since there is a core wire branch fixing piece arranged on multiple core wires and leaving a certain distance between it and one end of the sheath, it is possible to bundle and fix multiple core wires extending from the sheath, making it easier to arrange and connect the multiple core wires; since there is a glue fixing part, it is possible to glue and fix the inclined branch part of the core wire generated by the setting of the core wire branch fixing piece, thereby avoiding problems such as breaking or cracking of the inclined branch part; since the core wire branch fixing piece is also used to seal multiple core wires, and since there is a waterproof sealing sleeve covering the core wire branch fixing piece, the glue fixing part and one end of the sheath, it is possible to effectively waterproof and seal one end of the cable during long-term use, thereby avoiding water droplets and the like from entering through the gap at the end of the cable, thereby avoiding water ingress to electrical equipment and ensuring the normal operation of the electrical equipment. As described above, through the closed cable connection unit of the utility model, one end of the cable can be made easier to connect, not easily damaged and achieve long-term and effective waterproof sealing.

[0067] In an embodiment, the core wire branch fixture has multiple power line fixing holes and multiple signal line fixing holes corresponding to the cable structure, respectively allowing multiple power lines and signal lines to pass through, thereby bundling the multiple core wires. Moreover, according to the arrangement of the multiple power line fixing holes and the multiple signal line fixing holes, the arrangement of the multiple core wires after bundling is relatively more regular, which is conducive to subsequent wiring and connection. Furthermore, the fixing holes and the core wires have an interference fit, and the waterproof sealing sleeve covers the core wire branch fixture and one end of the sheath, so that the core wire and the core wire branch fixture are waterproof and sealed, and the gap at this end of the cable is also completely shielded, so that external water droplets and the like cannot enter the gap in the cable, and the waterproof sealing effect is better.

[0068] Furthermore, the arrangement of multiple power supply line fixing holes and multiple signal line fixing holes, as well as the threading method of multiple power supply lines and multiple signal lines, make the branch inclined parts of the core wires intertwined with each other, making the processing of the glued fixing part easier, and the distribution of the core wires in the glued fixing part after molding is relatively more uniform, and the force on the glued fixing part is also more uniform.

[0069] Furthermore, the core wire branch fixing part is a nitrile rubber part, and the waterproof sealing sleeve is a nitrile rubber sleeve, which has good waterproof performance and high wear resistance. It can effectively achieve waterproof sealing during long-term use and has good heat resistance, and is suitable for installation next to equipment that is prone to heat.

[0070] Furthermore, a stronger fastening ring is provided on the core wire branch fixing piece to further press and fix the core wire branch fixing piece to the core wire, and a fixing sleeve is also covered on the fastening ring, the glued fixing part and one end of the sheath to fix their relative positions. Therefore, even when the electrical equipment vibrates or the cable is pulled by external force, an effective waterproof seal can be maintained between the core wire branch fixing piece and the core wire, further improving the reliability of the closed cable connection unit.

[0071] Furthermore, the fastening ring is an aluminum ring, which is lightweight and easy to assemble. The fixed sleeve is a polyethylene double-wall heat-shrinkable tubing with a hot-melt adhesive inner layer. This not only makes assembly easier, but also allows the hot-melt adhesive to conform to complex internal structures, achieving a waterproof seal and further enhancing the waterproof performance of the enclosed cable connection unit. Furthermore, the polyethylene double-wall heat-shrinkable tubing has a wide operating temperature range and is suitable for sealing a wide variety of cable harnesses.

[0072] The above embodiments are merely examples of specific implementation methods of the present invention, and the present invention is not limited to the scope of the description of the above embodiments. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

[0073] For example, in the above embodiment, there are three power supply lines and six signal lines, and the core wire branch fixing piece 161 has a corresponding number of power supply line fixing holes and signal line fixing holes. In an alternative solution, the number of power supply lines and signal lines may also be different from that in the embodiment, and a corresponding number of power supply line fixing holes and signal line fixing holes are set on the core wire branch fixing piece 161, which can also achieve the corresponding technical effect.

[0074] In the above embodiment, based on the arrangement of the core wires in the example cable, the power line fixing holes on the core wire branch fixing member 161 are arranged in a triangular shape, and the signal line fixing holes are arranged in an arc shape on one side of the cross section. In an alternative solution, based on the arrangement of the core wires in another cable, the power line fixing holes and the signal line fixing holes can also adopt other suitable arrangements.

[0075] In the above embodiment, the core wire branch fixing piece 161 and the waterproof sealing sleeve 165 are made of nitrile rubber, and the gluing fixing part 162 is made of silicone rubber. In an alternative solution, the core wire branch fixing piece 161 and the waterproof sealing sleeve 165 can also be made of other waterproof materials with a certain elasticity, and the gluing fixing part 162 can also be made of other suitable adhesives.

Claims

1. A closed cable connection unit for waterproofing one end of a cable having a sheath and a plurality of core wires, wherein the plurality of core wires extend from one end of the sheath, characterized in that: include: A core wire branch fixture is arranged on the plurality of core wires and has a predetermined distance from one end of the sheath, and is used to bundle and seal the plurality of core wires, and the portion of the core wire between the core wire branch fixture and one end of the sheath is a branch inclined portion; A gluing and fixing portion, provided on the branch inclined portions of the plurality of core wires, for gluing and fixing the branch inclined portions; as well as A waterproof sealing sleeve is coated on the outer side of the core wire branch fixing piece, the glue fixing part and one end of the sheath.

2. The closed cable connection unit according to claim 1, characterized in that: in, The core wire branch fixing member has a plurality of fixing holes extending through the core wire branch fixing member along its axial direction, which are respectively used for passing the plurality of core wires through the fixing member and fixing the core wires. The inner diameter of the fixing hole is smaller than the outer diameter of the corresponding core wire.

3. The closed cable connection unit according to claim 2, characterized in that: in, The plurality of core wires include a plurality of power supply wires and a plurality of signal wires, The plurality of fixing holes include a plurality of power line fixing holes and a plurality of signal line fixing holes, On an axial cross section of the core wire branch fixing piece, the plurality of signal wire fixing holes are distributed on an edge portion of one side of the axial cross section.

4. The closed cable connection unit according to claim 3, characterized in that: in, There are three power supply line fixing holes. On the axial section of the core wire branch fixing piece, the centers of the three power supply wire fixing holes are located on the three vertices of a triangle, and one of the power supply wire fixing holes is located in the middle of the axial section.

5. The closed cable connection unit according to claim 1, characterized in that: in, The glued fixing portion is in a cone shape, the bottom surface of the cone faces the core wire branch fixing piece, and the top end of the cone faces one end of the sheath.

6. The closed cable connection unit according to any one of claims 1 to 5, characterized in that: in, The core wire branch fixing piece is a nitrile rubber piece. The glue fixing part is a silicone rubber piece. The waterproof sealing sleeve is a nitrile rubber sleeve.

7. The closed cable connection unit according to claim 1, characterized in that: Also includes: A fastening ring, which is mounted on and pressed onto the core wire branch fixing piece; as well as A fixing sleeve is covered on the fastening ring, the glue fixing part and one end of the sheath to fix their relative positions. The waterproof sealing sleeve is covered on the fixing sleeve and one end of the sheath.

8. The closed cable connection unit according to claim 7, characterized in that: in, The waterproof sealing sleeve comprises a sleeve covering part and a sheath covering part which are integrally formed. The sleeve covering portion covers the fixed sleeve, and the axial length of the sheath covering portion is greater than the axial length of the fixed sleeve. The sheath covering portion covers the sheath.

9. The closed cable connection unit according to claim 7, characterized in that: in, The sheath covering portion has a sheath fixing hole for the cable to pass through. The inner diameter of the sheath fixing hole is smaller than the outer diameter of the cable, The outer shape of the sleeve covering part is cylindrical. The outer shape of the sheath covering part is conical.

10. The closed cable connection unit according to any one of claims 7 to 9, characterized in that: in, The fastening ring is an aluminum ring. The fixed sleeve is a polyethylene double-wall heat shrinkable sleeve. The waterproof sealing sleeve is a nitrile rubber sleeve.

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