Wire harness and assembly process thereof

Abstract

The present invention discloses an electric wire harness and its assembly process, comprising a protective sleeve, a main wire body, a filling wire and a wire sleeve, the main wire body and the filling wire all pass through the protective sleeve, the main wire body and the filling wire are mutually spiraled into a spiral shape, the inner wall of the protective sleeve abuts against the outer wall of the main wire body, a plurality of protective sleeves are provided and arranged at intervals, the wire sleeve is located between two adjacent protective sleeves, the wire sleeve comprises a sleeve body 1, the upper and lower ends of the sleeve body 1 are connected to a sleeve body 3, the two axial ends of the sleeve body 1 are respectively inserted into the corresponding sleeve body 3, the sleeve body 3 is connected to the sleeve body 2, the sleeve body 2 comprises an extension plate, the extension plate is inserted into the protective sleeve so that the protective sleeve is formed with a spread part, the sleeve body 3 comprises a collar 3, the spread part passes through the collar 3, the collar 3 and the extension plate mutually press the spread part located between the two. The present invention provides an electric wire harness and its assembly process, which effectively prevents the wires in the harness from becoming loose.

Description

Technical Field

[0001] The invention relates to the technical field of electric wire harnesses, and in particular to an electric wire harness and an assembly process thereof. Background Art

[0002] At present, due to the large number of wires in large electrical equipment, new energy vehicles and other fields, wire harnesses are usually needed to constrain the wires for easy installation, arrangement and management. After multiple groups of wires are bundled and inserted into the same wire harness, there is a large gap between the wires and the harness, otherwise it is difficult for the wires to be inserted, and there are also gaps between the wires, which makes the wires in the harness easy to loosen, which is insufficient. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a wire harness and an assembly process thereof, which can effectively prevent the wires in the wire harness from becoming loose.

[0004] The present invention discloses an electric wire harness, comprising a protective cover, a main wire body, a filling wire and a wire cover. The main wire body and the filling wire all pass through the protective cover. The main wire body and the filling wire are mutually coiled into a spiral shape. The inner wall of the protective cover abuts against the outer wall of the main wire body. A plurality of protective covers are provided and arranged at intervals. The wire cover is located between two adjacent protective covers. The wire cover comprises a cover body one. Both axial upper and lower ends of the cover body one are connected to a cover body three. Both axial ends of the cover body one are respectively inserted into corresponding cover bodies three. The cover body three is connected to a cover body two. The cover body two comprises an extension plate. The extension plate is inserted into the protective cover so that the protective cover forms an expansion part. The cover body three comprises a ring three. The expansion part passes through the ring three. The ring three and the extension plate press the expansion part located between the two.

[0005] Furthermore, sleeve body one and sleeve body two are coaxially arranged, sleeve body two is located at the axial ends of sleeve body one, the end faces of sleeve body one at the axial ends respectively abut against the corresponding end faces of sleeve body two, the inner circumferential wall of sleeve body three is in contact with the outer circumferential wall of sleeve body one and the outer circumferential wall of sleeve body two, the end of sleeve body three away from sleeve body one extends out from the side of sleeve body two away from sleeve body one, and the ring three and the extension plate are both located on the side of sleeve body two away from sleeve body one.

[0006] Furthermore, the sleeve body three is connected to the sleeve body one through a fastener, and the fastener passes through the sleeve body three and the sleeve body one respectively in the radial direction.

[0007] Furthermore, the protective cover is made of rubber.

[0008] Furthermore, the sleeve body 1 includes a sleeve ring 1 and a sleeve ring 2. The sleeve ring 1 and the sleeve ring 2 are both semicircular rings. The sleeve ring 1 and the sleeve ring 2 are plugged into each other to form a circular ring.

[0009] Furthermore, a protrusion is provided on the inner wall of the first ring, the inner diameter of the inner wall of the protrusion is the same as the outer diameter of the main body of the wire, the inner wall surface of the protrusion is in contact with the outer wall surface of the main body of the wire, and the second ring is equipped with a slider, the slider includes an extension part, the extension part can slide circumferentially along the second ring, and the inner wall surface of the extension part is in contact with the outer wall surface of another main body part of the wire.

[0010] Furthermore, the second sleeve ring is provided with a groove body 1, the groove body 1 is slidably connected with a slider, and the extension portion is inserted into and extends out of the inner wall of the second sleeve ring.

[0011] Furthermore, a plurality of extension plates are provided along the two axial directions of the sleeve body, and the outer diameter of the extension plate gradually decreases in a direction away from the sleeve body, and the minimum outer diameter of the extension plate is the same as the inner diameter of the protective sleeve.

[0012] Furthermore, a pressing ring is installed in the groove body 1, and the pressing ring is inserted into the groove body 1 by interference fit, and the pressing ring presses the slider along the radial direction of the sleeve body 1.

[0013] The present invention also discloses an assembly process for a wire harness, wherein the assembly process for the wire harness comprises the following assembly steps:

[0014] ① Put a protective cover into the main body of the wire, install the second and third covers on the outer wall of the main body of the wire, hold the protective cover, insert the extension plate into the protective cover, so that the protective cover forms an open part;

[0015] ② Install the sleeve body 1, and then insert the sleeve ring 1 and the sleeve ring 2 into each other and sleeve them on the outer wall of the main wire body of the wire. The lower end face of the sleeve body abuts against the upper end face of the sleeve body 2, and the inner wall surface of the raised part abuts against the outer wall surface of the outer sheath of one wire. By adjusting the position of the slider, the extension part abuts against the outer wall surface of the outer sheath of another wire, and then install the pressing ring, and the pressing ring presses the slider tightly so that the extension part presses the outer sheath of the wire;

[0016] ③ Pull up the sleeve body 3 to align the through hole 3 with the through hole 1 and install the fasteners to fix the collar 1 with the sleeve body 3. Similarly, the through hole 2 and another through hole 3 on the sleeve body 3 are also fixed by fasteners to fix the collar 2 with the sleeve body 3. During the process of pulling up the sleeve body 3, the inner wall of the collar 3 and the outer wall of the extension plate gradually clamp the protective sleeve;

[0017] ④ Install the sleeve body 2 and the sleeve body 3 on the upper end of the sleeve body 1, the lower end surface of the sleeve body 2 is in contact with the upper end surface of the sleeve body 1, and another protective sleeve is inserted above the extension plate. The extension plate also opens the protective sleeve to form an open part, and the inner wall of the sleeve ring 3 and the outer wall of the extension plate are clamped to the protective sleeve in the same way as step ③, and the sleeve ring 1 and the sleeve ring 2 are fixed to the sleeve body 3 by fasteners;

[0018] ⑤ After completing the installation of one wire sleeve, continue to install another wire sleeve on the wire sleeve. The installation steps are the same as step ①, step ②, step ③, and step ④. In step ③, after the inner wall of the ring ring 3 and the outer wall of the extension plate clamp the protective sleeve, the sleeve body 1 is twisted to drive the main wire body and the filling wire to twist together, so that the main wire body and the filling wire are spirally wound around each other. After the sleeve body 1 is twisted, it is fixed to the sleeve body 3 by fasteners;

[0019] ⑥Repeat step ⑤ to complete the assembly of the entire wiring harness.

[0020] Beneficial effects of the present invention:

[0021] When the sleeve rotates along the axis, it can drive the main wire body of the wire to twist and form a spiral shape, thereby increasing the contact area between the outer layer of the wire, the filling wire, and the protective sleeve and squeezing them together, forming a mutually squeezed and tightened state, so as to prevent the wire from becoming loose during transportation, installation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A perspective view of an embodiment;

[0023] Figure 2 A partial cross-sectional view of an embodiment Figure 1 ;

[0024] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0025] Figure 4 is a cross-sectional view of a sleeve body 1 in the embodiment;

[0026] Figure 5 It is a three-dimensional diagram of the installation of the sleeve body 1 and the sleeve body 3 in the embodiment;

[0027] Figure 6 It is a three-dimensional diagram of the second sleeve in the embodiment;

[0028] Figure 7 A partial cross-sectional view of an embodiment Figure 2 ;

[0029] Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0030] Figure numerals: sleeve body 1, ring 11, protrusion 111, through hole 112, ring 2 12, groove body 121, groove body 2 122, through hole 2 123, slider 13, extension portion 131, pressure ring 14, sleeve body 2, ring body 21, extension plate 22, sleeve body 3, ring 3 31, through hole 32, protective sleeve 4, expansion portion 41, main wire body 5, wire outer layer 51, filling wire 6, fastener 7. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in this embodiment to clearly and completely describe the technical solution in this embodiment. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] like Figure 1 , Figure 2 As shown, a wire harness includes a protective cover 4, a main wire body 5, a filling wire 6 and a wire cover, the protective cover 4 is cylindrical, the axial length of a single protective cover 4 is set at 500mm-800mm, the main wire body 5 and the filling wire 6 all pass through the protective cover 4, the protective cover 4 is made of rubber, the main wire body 5 and the filling wire 6 are spirally coiled around each other, and the length of one spiral of the main wire body 5 is set at 100mm-160mm.

[0033] like Figure 2 As shown, the main wire body 5 includes a core body and a peripheral wire outer sheath 51, the inner wall of the protective sheath 4 abuts against the outer wall of the wire outer sheath 51, and the main wire body 5 is provided with four, six or eight wires along the circumference of the protective sheath 4. The protective sheath 4 is arranged at intervals up and down along the extension direction of the main wire body 5, and the wire sheath is located between two adjacent protective sheaths 4.

[0034] like Figure 1 , 2 As shown, the wire sleeve includes a sleeve body 1, combined with Figure 4 , Figure 5 The sleeve body 1 includes a sleeve ring 11 and a sleeve ring 12. Both the sleeve ring 11 and the sleeve ring 12 are semicircular ring structures. The sleeve ring 11 and the sleeve ring 12 are plugged into each other to form a circular ring. At the connection between the sleeve ring 11 and the sleeve ring 12, the sleeve ring 11 and the sleeve ring 12 are respectively inserted into the sleeve ring 11 and the sleeve ring 12 through interference fit at both ends of the axial direction of the pin to achieve the plug-in connection between the two.

[0035] like Figure 4 As shown, a protrusion 111 is provided on the inner wall of the ring 11, the inner diameter of the inner wall of the protrusion 111 is the same as the outer diameter of the main wire body 5 of the wire, and the inner wall surface of the protrusion 111 is in contact with a part of the outer wall surface of the outer sheath 51 of the wire.

[0036] like Figure 4 , Figure 5As shown, the second ring 12 is provided with a groove body 121, and the groove body 121 is connected to the second groove body 122. The second groove body 122 radially penetrates the second ring 12, and the groove body 121 is slidably connected to the slider 13. The slider 13 includes an extension portion 131, and the extension portion 131 can slide circumferentially along the second ring 12. The extension portion 131 is inserted into and extends out of the inner wall of the second ring 12, and the inner wall surface of the extension portion 131 is in contact with a part of the outer wall surface of another wire outer sheath 51 (that is, the wire outer sheath 51 that is not in contact with the protrusion 111). The groove body 121 is installed with a pressing ring 14, and the pressing ring 14 is inserted into the groove body 121 with an interference fit. The pressing ring 14 presses the slider 13 so that the extension part 131 is close to the outer sheath 51 of the wire, so that when the sleeve body 1 rotates along the axis, it can drive the main wire body 5 of the wire to twist and form a spiral shape, thereby increasing the contact area between the outer sheath 51 of the wire, the filling wire 6, and the protective sleeve 4 and squeezing each other together to form a state that is not easy to loosen.

[0037] Since the circumferential position of the main wire body 5 is uncertain, a slidable and adjustable slider 13 is provided. After the protrusion 111 presses one of the main wire bodies 5, another main wire body 5 is pressed in the opposite direction of the protrusion 111 to facilitate the twisting operation of multiple main wire bodies 5.

[0038] like Figure 2 , Figure 3 As shown, both ends of the sleeve body 1 in the axial direction are connected with the sleeve body 3 3, and the upper and lower ends of the sleeve body 1 in the axial direction are respectively inserted into the corresponding sleeve body 3 3, and the sleeve body 3 3 can move up and down along the outer wall of the sleeve body 1, and the sleeve body 3 3 is connected to the sleeve body 1 through the fastener 7. Specifically, the sleeve body 3 3 is provided with a through hole 32, and the collar 11 is provided with a through hole 112. Figure 8 The fastener 7 is respectively inserted through the through hole 32 and the through hole 112 in the radial direction by interference fit, so that the sleeve body 3 3 is fixed to the sleeve body 1 1. Similarly, the collar 2 12 is provided with a through hole 2 123, and the through hole 2 123 and another through hole 3 32 on the sleeve body 3 3 are also fixed by the fastener 7.

[0039] like Figure 2 As shown, sleeve three 3 is connected to sleeve two 2, sleeve one 1 and sleeve two 2 are coaxially arranged, sleeve two 2 is located at the upper and lower ends of the axial direction of sleeve one 1, and the end faces of the axial ends of sleeve one 1 respectively abut against the corresponding end faces of sleeve two 2, and the main wire body 5 and the filling wire 6 pass through sleeve two 2.

[0040] like Figure 6 As shown, the sleeve body 3 includes a sleeve ring 31, combined with Figure 3The sleeve body 2 includes an extension plate 22, and a plurality of extension plates 22 are arranged along the axial direction of the sleeve body 2. The outer diameter of the extension plate 22 gradually decreases in the direction away from the sleeve body 1, and the minimum outer diameter of the extension plate 22 is the same as the inner diameter of the protective sleeve 4. The inner peripheral wall of the sleeve body 3 3 is in contact with the outer peripheral wall of the sleeve body 1 and the outer peripheral wall of the sleeve body 2 2. The end of the sleeve body 3 3 away from the sleeve body 1 extends out from the side of the sleeve body 2 2 away from the sleeve body 1, and the collar 3 31 and the extension plate 22 are both located on the side of the sleeve body 2 2 away from the sleeve body 1.

[0041] The extension plate 22 is inserted into the protective sleeve 4 so that the protective sleeve 4 is formed with an opening portion 41. To facilitate the insertion of the extension plate 22 into the protective sleeve 4, the extension plate 22 is arranged to be spaced along the circumferential direction of the sleeve body 2. The opening portion 41 has an outer diameter greater than that of the protective sleeve 4. The opening portion 41 passes through the collar 3 31. The collar 3 31 moves upward so that the through hole 3 32 is aligned with the through hole 2 123 and connected by the fastener 7. At the same time, the collar 3 31 and the extension plate 22 mutually press the opening portion 41 located therebetween.

[0042] An assembly process for a wire harness is provided, wherein the wire harness is assembled. The specific assembly process is as follows:

[0043] ① Such as Figure 7 As shown, a protective cover 4 is put into the main wire body 5, and the outer wall of the main wire body 5 is installed with a cover body 2 and a cover body 3. In order to facilitate the cover body 2 to be put into the main wire body 5, the cover body 2 is combined with the cover body 3. Figure 6 The second sleeve body 2 is configured to be plugged in from both sides of the ring body 21, and the third sleeve body 3 can also be configured to be in the same plugging mode. Holding the protective sleeve 4, the extension plate 22 is inserted into the protective sleeve 4, so that the protective sleeve 4 forms a support portion 41.

[0044] ② Install the sleeve 1, the sleeve ring 11 and the sleeve ring 2 12 are inserted into each other and then sleeved on the outer wall of the main body 5 of the electric wire, and the lower end surface of the sleeve 1 abuts against the upper end surface of the sleeve 2. The inner wall surface of the protrusion 111 abuts against the outer wall surface of a part of the outer sheath 51 of the electric wire, and the position of the slider 13 is adjusted so that the extension part 131 abuts against the outer wall surface of the part of the outer sheath 51 of the other electric wire, and then the pressing ring 14 is installed, and the pressing ring 14 presses the slider 13 so that the extension part 131 presses the outer sheath 51 of the electric wire.

[0045] ③If Figure 8 As shown, the sleeve body 3 is pulled up so that the through hole 32 is aligned with the through hole 112 and the fastener 7 is installed to fix the collar 11 to the sleeve body 3. Similarly, the through hole 2 123 and another through hole 32 on the sleeve body 3 are also fixed by the fastener 7 to fix the collar 2 12 to the sleeve body 3. During the process of pulling up the sleeve body 3, the inner wall of the collar 3 31 and the outer wall of the extension plate 22 gradually clamp the protective sleeve 4.

[0046] ④ Install the sleeve body 2 and the sleeve body 3 on the upper end of the sleeve body 1, the lower end surface of the sleeve body 2 is in contact with the upper end surface of the sleeve body 1, and another protective sleeve 4 is inserted above the extension plate 22. The extension plate 22 also expands the protective sleeve 4 to form an expanded portion 41. The inner wall of the sleeve ring 3 31 and the outer wall of the extension plate 22 are clamped to the protective sleeve 4 in the same way as step ③, and the sleeve ring 11 and the sleeve ring 2 12 are fixed to the sleeve body 3 3 through the fastener 7. In this step, the sleeve body 3 3 is pulled down to gradually clamp the inner wall of the sleeve ring 3 31 and the outer wall of the extension plate 22 to the protective sleeve 4.

[0047] ⑤ Such as Figure 7 As shown, after completing the installation of one wire sleeve, another wire sleeve is installed on the wire sleeve. The installation steps are the same as step ①, step ②, step ③, and step ④. In step ③, after the inner wall of the ring 31 and the outer wall of the extension plate 22 clamp the protective sleeve 4, the sleeve body 1 located above is twisted. At this time, the sleeve body 1 located below is fixed by clamping to keep the main wire body 5 of the wire clamped by the sleeve body 1 below relatively fixed. When the upper sleeve body 1 is twisted, the main wire body 5 and the filling line 6 of the wire are twisted together, so that the main wire body 5 and the filling line 6 of the wire are spirally coiled, thereby increasing the contact area between the outer layer 51 of the wire, the filling line 6, and the protective sleeve 4 and squeezing each other together to form a state that is not easy to loosen. After the sleeve body 1 is twisted, it is fixed with the sleeve body 3 3 by the fastener 7. After the sleeve body 1 is twisted, the through hole 2 123 is aligned with the through hole 3 32, and the through hole 1 112 is aligned with the other through hole 3 32.

[0048] ⑥Repeat step ⑤ to complete the assembly of the entire wiring harness.

[0049] Due to the friction between the protective cover 4 and the main wire body 5, during the process of twisting the cover body 1, the main wire body 5 in the protective cover 4 is stretched along the twisting direction by holding the protective cover 4 and twisting it to prevent the main wire body 5 from getting stuck in the protective cover 4 when twisting.

[0050] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A wire harness, characterized in that: The invention comprises a protective sleeve (4), a main wire body (5), a filling wire (6) and a wire sleeve, wherein the main wire body (5) and the filling wire (6) both pass through the protective sleeve (4), the main wire body (5) and the filling wire (6) are mutually spirally wound, the inner wall of the protective sleeve (4) abuts against the outer wall of the main wire body (5), the protective sleeve (4) is provided with a plurality of protective sleeves (4) and arranged at intervals, the wire sleeve is located between two adjacent protective sleeves (4), the wire sleeve comprises a sleeve body (1), the upper and lower ends of the sleeve body (1) are connected to the sleeve body Three (3), the axial ends of the sleeve body one (1) are respectively inserted into the corresponding sleeve body three (3), the sleeve body three (3) is connected to the sleeve body two (2), the sleeve body two (2) includes an extension plate (22), the extension plate (22) is inserted into the protective sleeve (4) so ​​that the protective sleeve (4) forms an expansion portion (41), the sleeve body three (3) includes a ring three (31), the expansion portion (41) passes through the ring three (31), the ring three (31) and the extension plate (22) mutually press the expansion portion (41) located therebetween; The sleeve body 1 (1) comprises a sleeve ring 1 (11) and a sleeve ring 2 (12), wherein the sleeve ring 1 (11) and the sleeve ring 2 (12) are both semicircular rings, and the sleeve ring 1 (11) and the sleeve ring 2 (12) are plugged into each other to form a circular ring; The inner wall of the first ferrule (11) is provided with a protrusion (111), the inner diameter of the inner wall of the protrusion (111) is the same as the outer diameter of the main wire body (5), the inner wall surface of the protrusion (111) is in contact with a part of the outer wall surface of the main wire body (5), the second ferrule (12) is provided with a slider (13), the slider (13) includes an extension part (131), the extension part (131) can slide along the circumference of the second ferrule (12), the inner wall surface of the extension part (131) is in contact with another part of the outer wall surface of the main wire body (5); The second sleeve ring (12) is provided with a groove body (121), the groove body (121) is slidably connected with the slider (13), and the extension portion (131) is inserted into and extends out of the inner wall of the second sleeve ring (12); The groove body 1 (121) is provided with a pressing ring (14), the pressing ring (14) is inserted into the groove body 1 (121) by interference fit, and the pressing ring (14) presses the slider (13) along the radial direction of the sleeve body 1 (1); It also includes a fastener (7), the sleeve body (3) is provided with a through hole (32), the collar (11) is provided with a through hole (112), and the fastener (7) is respectively passed through the through hole (32) and the through hole (112) in a radial direction by interference fit; The second sleeve ring (12) is provided with a second through hole (123), and the second through hole (123) is fixed to another third through hole (32) on the third sleeve body (3) by means of the fastener (7).

2. The wire harness according to claim 1, characterized in that: The sleeve body 1 (1) is coaxially arranged with the sleeve body 2 (2), the sleeve body 2 (2) is located at the two axial ends of the sleeve body 1 (1), the end faces of the two axial ends of the sleeve body 1 (1) respectively abut against the corresponding end faces of the sleeve body 2 (2), the inner circumferential wall of the sleeve body 3 (3) is in contact with the outer circumferential wall of the sleeve body 1 (1) and the outer circumferential wall of the sleeve body 2 (2), the end of the sleeve body 3 (3) away from the sleeve body 1 (1) extends out of the side of the sleeve body 2 (2) away from the sleeve body 1 (1), and the ring 3 (31) and the extension plate (22) are both located on the side of the sleeve body 2 (2) away from the sleeve body 1 (1).

3. The wire harness according to claim 1, characterized in that: The sleeve body three (3) is connected to the sleeve body one (1) via a fastener (7), and the fastener (7) passes through the sleeve body three (3) and the sleeve body one (1) respectively in the radial direction.

4. The wire harness according to claim 1, characterized in that: The material of the protective cover (4) is rubber.

5. The wire harness according to claim 1, characterized in that: A plurality of extension plates (22) are provided axially along the second sleeve body (2), and the outer diameter of the extension plates (22) gradually decreases in a direction away from the first sleeve body (1). The minimum outer diameter of the extension plates (22) is the same as the inner diameter of the protective sleeve (4).

6. A wire harness assembly process, comprising assembling a wire harness according to any one of claims 1 to 5, characterized in that: The assembly steps include: ① Put a protective cover (4) into the main wire body (5), install the second cover (2) and the third cover (3) on the outer wall of the main wire body (5), hold the protective cover (4), and insert the extension plate (22) into the protective cover (4), so that the protective cover (4) forms a spreading part (41); ② Install the sleeve body (1), the sleeve ring (11) and the sleeve ring (12) are inserted into each other and then sleeved on the outer wall of the main body (5) of the electric wire, the lower end surface of the sleeve body (1) abuts against the upper end surface of the sleeve body (2), the inner wall surface of the protrusion (111) abuts against the outer wall surface of a part of the outer sheath (51) of the electric wire, and the position of the slider (13) is adjusted so that the extension part (131) abuts against the outer wall surface of a part of the outer sheath (51) of the other electric wire, and then install the pressing ring (14), and the pressing ring (14) presses the slider (13) so that the extension part (131) presses against the outer sheath (51) of the electric wire; ③ Pull up the sleeve body three (3) so that the through hole three (32) is aligned with the through hole one (112) and install the fastener (7) to fix the collar one (11) to the sleeve body three (3). Similarly, the through hole two (123) and another through hole three (32) on the sleeve body three (3) are also fixed by the fastener (7) to fix the collar two (12) to the sleeve body three (3). During the process of pulling up the sleeve body three (3), the inner wall of the collar three (31) and the outer wall of the extension plate (22) gradually clamp the protective sleeve (4); ④ Install the second sleeve (2) and the third sleeve (3) on the upper end of the first sleeve (1), the lower end surface of the second sleeve (2) abuts against the upper end surface of the first sleeve (1), insert another protective sleeve (4) above the extension plate (22), the extension plate (22) also expands the protective sleeve (4) to form an expanded portion (41), and clamp the protective sleeve (4) with the inner wall of the third sleeve (31) and the outer wall of the extension plate (22) in the same manner as step ③, and fix the first sleeve (11) and the second sleeve (12) to the third sleeve (3) by fasteners (7); ⑤ After completing the installation of one wire sleeve, continue to install another wire sleeve on the wire sleeve, and the installation steps are the same as steps ①, ②, ③, and ④. In step ③, after the inner wall of the ring three (31) and the outer wall of the extension plate (22) clamp the protective sleeve (4), the sleeve body one (1) is twisted to drive the main wire body (5) and the filling wire (6) to twist together, so that the main wire body (5) and the filling wire (6) are spirally wound around each other, and the sleeve body one (1) is twisted and then fixed to the sleeve body three (3) through the fastener (7); ⑥Repeat step ⑤ to complete the assembly of the entire wiring harness.

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