Wrappable, woven, wear-resistant and anti-electromagnetic interference sleeve
Through a single-layer braided casing, using the float structure of warp and weft wires and conductive weft wires, the wear and cost problems of multi-layer casings are solved, and efficient electromagnetic interference shielding and mechanical protection are achieved.
Patent Information
- Application Number
- CN202420832566.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-04-21
- Filing Date
- 2024-04-22
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-04-22
AI Technical Summary
Existing windable multilayer sleeves have wear problems when protecting wires and external components and increase manufacturing and assembly costs and assembly volume.
A single-layer windable braided casing is used to form a float structure through a braided structure of warp and weft wires, including conductive and non-conductive wires, to avoid wear and tear, and to improve electromagnetic interference performance through conductive weft wires.
Effectively shields electromagnetic interference and prevents wear and tear on wires and external components, while reducing the weight and volume of components and improving durability and impact resistance.
Smart Images
Figure CN222380309U_ABST
Abstract
Description
[0001] Cross-reference to related applications
[0002] This application claims the benefit of U.S. Provisional Application Serial No. 63 / 497,604, filed on April 21, 2023, which is incorporated herein by reference in its entirety. Technical Field
[0003] The utility model generally relates to a textile sleeve for protecting an elongated member, in particular to a wrappable braided sleeve which provides wear resistance and electromagnetic interference resistance characteristics for a wire contained therein. Background Art
[0004] It is well known that elongated members such as wires and wiring harnesses (hereinafter referred to as wires) can be enclosed in a wrappable braided sleeve and protected to protect the wires from electromagnetic interference (EMI). However, known EMI sleeves have the potential to cause wear to the internal wires and / or features on the outside of the sleeve. In order to reduce the potential wear of the EMI sleeve on the wires and / or external components, additional wear-resistant sleeves with a softer surface and touch (feel) are sometimes used inside and / or outside the EMI sleeve to form a multi-layer sleeve. Although the additional wear-resistant sleeve helps reduce wear between the EMI sleeve and the internal and / or external components, the additional layers increase cost from a manufacturing and assembly perspective and increase the volume (weight and thickness) of the EMI sleeve assembly. Summary of the invention
[0005] One aspect of the present disclosure is to provide a wrappable single-layer sleeve that at least addresses and overcomes the above-mentioned disadvantages of the known wrappable multi-layer sleeves.
[0006] According to one aspect of the present disclosure, a wrappable EMI sleeve provides a single layer wrappable sleeve that effectively shields EMI while also preventing abrasion of the protected wires and / or external elements. The EMI sleeve also prevents abrasion of the wires and external elements. In addition, to provide optimal protection in physically demanding environments, such as those encountered in motor vehicle and railway applications, for example, the EMI sleeve according to the present disclosure also has high durability, impact resistance, while also having flexibility to allow the sleeve to be routed around corners and on tortuous paths. In addition, the sleeve is lightweight and compact, so it takes up minimal space.
[0007] Therefore, according to a non-limiting embodiment, a wrappable braided sleeve for wiring and protecting an elongated member from electromagnetic interference is provided, while further providing mechanical protection to prevent wear, impact and other environmental conditions (such as pollution). The wall has opposite edges extending longitudinally between the two ends. The wall is wound into a tubular structure around a central longitudinal axis, and the tubular structure defines a closed cavity, the size of the cavity is suitable for accommodating the elongated member therein. The wall is woven from warp threads extending substantially parallel to the central longitudinal axis and weft threads extending approximately transversely to the warp threads. The warp threads include conductive threads provided as metal threads and separate non-conductive warp threads. The weft threads include heat-set threads, which are formed to bias the wall into a cylindrical shape and bias the opposite edges into a mutually overlapping relationship. The weft threads also include conductive threads.
[0008] According to another aspect of the present invention, the non-conductive warp threads form repeated floats, and the floats extend above and / or below two or more weft threads.
[0009] According to another aspect of the invention, the non-conductive warp threads form repeating floats that extend above two or more weft threads such that the repeating floats face outwardly away from the central longitudinal axis of the wall.
[0010] According to another aspect of the present invention, the non-conductive warp threads form repeating floats that extend below two or more weft threads such that the repeating floats face inwardly toward the central longitudinal axis of the wall.
[0011] According to another aspect of the present invention, the warp wires may be woven into a plain weave pattern.
[0012] According to another aspect of the present invention, the weft heat setting yarns and the weft conductive yarns alternate with each other in a spaced relationship along the central longitudinal axis of the sleeve.
[0013] According to another aspect of the present invention, the weft conductive threads are metallized threads.
[0014] According to another aspect of the present invention, the metallized wire is a metallized non-conductive multi-filament.
[0015] According to another aspect of the present invention, the metallized wire is a metallized non-conductive monofilament.
[0016] According to another aspect of the present invention, the weft conductive yarn is a hybrid yarn including a monofilament or multifilament synthetic yarn twisted or wound together with a continuous conductive metal wire.
[0017] According to another aspect of the present invention, the non-conductive warp threads and the warp metal threads alternate with each other in a spaced relationship around the circumference of the wall.
[0018] According to another aspect of the invention, circumferentially adjacent floats, whether extending along the outer surface or the inner surface of the casing, are offset and staggered from each other so that one of the adjacent floats extends axially beyond the other of the adjacent floats, thereby avoiding the formation of a continuous annular valley, thereby maximizing the protection of the conductor from wear.
[0019] According to another aspect of the present invention, a float extending along the outer surface of the sleeve may form a ring portion of a hook and loop type fastener, thereby being connectable to a hook portion of the hook and loop type fastener.
[0020] According to another aspect of the present invention, the sleeve may be comprised of a single wall to prevent abrasion of the elongated member and / or external elements adjacent to the sleeve.
[0021] According to another aspect of the utility model, a wrappable braided anti-electromagnetic interference sleeve for wiring and protecting elongated members includes: a single-layer wall having opposite edges extending longitudinally between opposite ends. The wall can be self-wrapped around a central longitudinal axis into a tubular structure, and the tubular structure defines a closed cavity, the size of the cavity is suitable for accommodating the elongated member therein. The wall is woven from warp threads extending substantially parallel to the central longitudinal axis and weft threads extending substantially transverse to the warp threads. The warp threads include metal threads and non-conductive warp threads separated from the metal threads. The weft threads include heat-set threads and conductive threads that overlap opposite edges. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The above and other aspects, features and advantages will become apparent to those skilled in the art in view of the following detailed description of the presently preferred embodiment and best mode, the appended claims and the accompanying drawings, in which:
[0023] Figure 1 is a schematic perspective view of a braided self-wrapping sleeve constructed according to one aspect of the present invention, the sleeve shown in the figure carrying and protecting an elongated member therein;
[0024] Figure 2 It is roughly along Figure 1 A cross-sectional side view of a portion of the wall of the sleeve taken along line 2-2, showing a cross-section of a conductive thread woven with a plurality of weft threads in a longitudinal warp direction;
[0025] Figure 3A is with Figure 2 A similar view showing a cross section of a non-conductive yarn woven together with a plurality of weft yarns in the longitudinal warp direction;
[0026] Figure 3B is with Figure 3A A similar view showing a cross section of a non-conductive yarn woven together with a plurality of weft yarns in the longitudinal warp direction;
[0027] Figure 4A is a plan view showing the outer surface of the wall of the sleeve in a flattened state;
[0028] Figure 4B is a plan view showing the inner surface of the wall of the sleeve in a flattened state;
[0029] Figure 5A is a transverse cross-sectional view of a conductive metallized weft yarn according to one aspect of the present disclosure;
[0030] Figure 5B is a transverse cross-sectional view of a conductive metallized weft yarn according to another aspect of the present disclosure;
[0031] Figure 5C is a fragmentary side view of a conductive hybrid yarn according to one aspect of the present disclosure; and
[0032] Figure 5D is a fragmentary side view of a conductive hybrid yarn according to another aspect of the present disclosure. DETAILED DESCRIPTION
[0033] Referring to the accompanying drawings in more detail, Figure 1 A winding ( Figure 1 1 and 12 are schematic diagrams of a braided, wear-resistant, EMI-resistant sleeve 10 (hereinafter referred to as the sleeve) that is shown as wrapped. The sleeve 10 has a wrappable elongated wall 12 for routing and protecting an elongated member 14 (e.g., a conductive wire or wiring harness), such as from EMI, abrasion, impact, and other environmental conditions (e.g., fluid and debris contamination). The elongated wall 12 is not only wear-resistant itself, but also wear-resistant to the elongated member 14 and external elements (e.g., adjacent wires, tubes, etc.). Therefore, the sleeve 10 can prevent wear to the elongated member 14 and adjacent components. The wall 12 can be designed to have any suitable size, including length and diameter, depending on different applications.
[0034] The opposed edges 16, 17 of the wall 12 extend parallel or substantially parallel (that is, not truly parallel, but only about 5 degrees or less from truly parallel, so that the edges 16, 17 appear to be parallel to an ordinary observer) to a central longitudinal axis 18 between opposite ends 19, 20, wherein the edges 16, 17 are biased by the interior of the wall 12 to overlap each other in a "cigarette wrapped" manner to completely enclose the elongated member 14 within the central cavity 21 of the sleeve 10. By separating the opposed edges 16, 17 from each other, the cavity 21 can be easily accessed along the entire length of the wall 12, so that the elongated member 14 can be easily placed into the cavity 21 radially relative to the axis 18, and conversely, can also be removed from the cavity 21, such as during use.
[0035] like Figure 2-3B As best shown (a portion of the wall 12 viewed along the cross-sectional line 2-2 is shown, wherein the portion represents the entirety of the wall 12), the wall 12 is woven from warp threads 22 extending parallel or substantially parallel to the central longitudinal axis 18, and weft threads 24 extending circumferentially and transversely (or substantially transversely), and the weft threads 24 generally have the same meaning as the warp threads 22 described above. The warp threads 22 include conductive longitudinal metal threads, also referred to as conductors 22a ( Figure 2 ) and non-conductive wire 22b ( Figure 3A and 3B ,in Figure 3A and 3B These can be separate embodiments or can be combined with each other in the same embodiment to include internal and external floats).
[0036] To provide EMI protection to the elongated member 14, by way of example and not limitation, the warp wires 22a are electrically conductive conductors, such as having a diameter between about 0.05-0.2 mm, and in one non-limiting embodiment, between about 0.8-1.2 mm. The wires 22a can be individual, independent continuous wires, or can be bundles of wires, such as micro-bands of continuous wires. By way of example and not limitation, a wire 22a having a copper core encapsulated by an outer layer of nickel coated with tin or copper can be provided. To optimize EMI protection, as will be understood by one of ordinary skill in the art of textile fabrics, the wires 22a are woven with the weft wires 24 in a plain weave, thereby passing over and under adjacent weft wires 24 in a repeating manner. It is contemplated that, if desired, the wires 22a can be woven into any desired weave pattern as required by the application.
[0037] In order to provide wear resistance to prevent abrasion of the elongated member 14 and the outer and adjacent adjacent components of the sleeve 10, the non-conductive warp wire 22b is provided as a non-abrasive, non-conductive wire. To further enhance the non-abrasive properties of the wall 12, the non-conductive warp wire 22b can be provided with a diameter larger than the conductive wire 22a, thereby preventing the conductive wire 22a from contacting adjacent surfaces. In addition, according to one aspect of the utility model, in order to prevent abrasion of external elements adjacent to the outer surface 23 of the sleeve 10, the non-conductive warp wire 22b can be woven into a weave pattern ( Figure 3A ; float 26a along the exposed outer surface 23 of wall 12), float 26a extends radially outward relative to the bottom weft 24, thereby passing over two or more adjacent wefts 24, passing under one weft 24, and then passing over two or more wefts 24, as will be understood by those of ordinary skill in the art of textile fabrics, in a repeated manner. Figure 4AAs shown, circumferentially adjacent floats 26a are juxtaposed with one another and may be staggered relative to one another so that adjacent floats 26a of adjacent warp yarns 22b are not circumferentially aligned in a mirror-image, side-by-side manner, but extend axially beyond one another. Figure 4A and 4B As shown, because adjacent floats 26a are staggered, no circumferentially extending annular valley is formed between the floats 26a, thereby providing maximum shielding and wear protection to prevent the wires 22a from contacting external elements.
[0038] Furthermore, according to another aspect of the present invention, in order to prevent the conductive warp threads 22a from wearing the elongated member 14, the non-conductive warp threads 22b are woven into a weaving pattern ( Figure 3B ; float 26b extends along the concealed inner surface of wall 12), float 26b extends radially inward relative to the overlying weft filaments 24, thereby passing under two or more adjacent weft filaments 24, then passing over one weft filament 24, and then passing under two or more weft filaments 24, as will be understood by those of ordinary skill in the art of textile fabrics, in a repeating manner. Figure 4B As shown, the floats 26b may be woven circumferentially staggered relative to one another so that adjacent floats 26b of adjacent warp threads 22b are not circumferentially aligned with one another in a mirrored, side-by-side manner, but rather extend axially beyond one another to form a plurality of pads (each float forming a separate pad) for engaging the elongated member 14 to protect the elongated member from vibration and damage, and to prevent the conductors 22a from contacting and abrading the elongated member 14. It will be appreciated that the non-conductive warp threads 22b may be woven as described above to form one or both of the outer and inner floats 26a, 26b in the wall 12.
[0039] The non-abrasive, non-conductive warp yarns 22b can be provided in the form of synthetic monofilaments having a desired diameter and / or synthetic multifilaments having a desired denier, as desired. The non-abrasive, non-conductive warp yarns 22b of the sleeve 10, when provided in a multifilament form, can provide a bulky, fluffy multifilament that not only provides enhanced protection against impact forces, but also provides a loop portion for securing the sleeve 10 to an external securing mechanism (shown as a hook portion 28 of a hook and loop type securing mechanism). It should be appreciated that the hook portion 28 can be disposed on any desired surface adjacent the sleeve 10, such that the loop portion provided by the multifilaments 22b can be connected to the hook portion 28. If desired, the non-abrasive, non-conductive warp yarns 22b and the metal wires 22a can be woven alternately with each other around the circumference of the wall 12, thereby having an equal number of ends.
[0040] The weft 24 includes a heat-set weft 24a and a conductive weft 24b. The heat-set weft 24a and the conductive weft 24b can be woven alternately at intervals of 1:1 along the length of the sleeve 10. As an example and not a limitation, the heat-set weft 24a can be a polypropylene monofilament, or any other thermosetting material, including polyphenylene sulfide, polyethylene, etc. The heat-set weft 24a is heat-set when it is wrapped around the mandrel on the wall 12, thereby imparting an internal bias in the heat-set weft 24a, so that the internal bias plays a role in biasing and maintaining the overlapping relationship between the relative edges 16 and 17. When it is necessary to enter the central cavity 21, the relative edges 16 and 17 can be pulled apart laterally by applying an appropriate external force to deviate from each other, such as during the assembly of the elongated member 14 into the central cavity 21 or during the use of the elongated member 14.
[0041] The conductive weft yarn 24b may be any suitable metallized synthetic yarn ( Figure 5A and 5B ), whether it is monofilament 28a( Figure 5A ) and / or multifilament 28b( Figure 5B ) may be coated and metallized with an outer coating 30 of a metal (e.g., silver, and / or copper, and / or aluminum) or any suitable conductive metal or metal alloy. Otherwise, it is contemplated that the conductive weft yarn 24b may be provided as a hybrid yarn 32 ( Figure 5C and 5D ), the hybrid yarn 32 includes a non-conductive synthetic yarn (monofilament 34a ( Figure 5C ) or multi-wire ( Figure 5D As described above, the conductive weft 24b has appropriate flexibility to allow the heat-set weft 24a to bias the opposing edges 16, 17 into overlapping relationship. The conductive weft 24b is woven into electrical communication with the warp 22a, thereby improving the electromagnetic interference performance of the sleeve 10.
[0042] Obviously, according to the above teachings, the utility model can be modified and varied in many ways. It is conceivable that all features of all claims and all embodiments can be combined with each other, as long as such combinations do not contradict each other. Therefore, it should be understood that within the scope of the attached claims, the utility model can be implemented in ways other than those specifically described.
Claims
1. A wrappable, braided, wear-resistant and electromagnetic interference-resistant sleeve, comprising: A wall having opposed edges extending longitudinally between ends thereof, said wall being wound about a central longitudinal axis into a tubular structure defining an enclosed cavity sized to receive an elongated member therein, characterized in that The wall is woven from warp threads extending substantially parallel to the central longitudinal axis and weft threads extending substantially transverse to the warp threads, the warp threads comprising metal threads and non-conductive warp threads, and the weft threads comprising heat-set threads and conductive threads that cause the opposing edges to overlap each other.
2. The wrappable, braided, wear-resistant and electromagnetic interference resistant sleeve according to claim 1, wherein the conductive filament is a hybrid yarn including a synthetic yarn on which a conductive metal filament is twisted or wrapped.
3. The wrappable, braided, wear-resistant and EMI-resistant sleeve according to claim 1, wherein the non-conductive warp wire has a float extending above and / or below two or more of the weft wires.
4. The spoolable, braided, wear-resistant and EMI resistant sleeve of claim 3, wherein circumferentially adjacent ones of the floats are staggered relative to each other such that the circumferentially adjacent ones of the floats extend axially beyond each other.
5. The wrappable, braided, wear-resistant and EMI-resistant sleeve according to claim 3, wherein the metal wires are braided in a plain weave.
6. The wrappable, braided, wear-resistant and electromagnetic interference resistant sleeve according to claim 3, wherein the heat-set wires and the conductive wires are alternated with each other.
7. The wrappable, braided, wear-resistant and electromagnetic interference resistant sleeve according to claim 3, wherein the conductive filament is a hybrid yarn including a synthetic yarn on which a conductive metal filament is twisted or wrapped.
8. The wrappable, braided, wear-resistant and electromagnetic interference resistant sleeve according to claim 3, wherein the conductive wire is a metallized wire.
9. The wrappable, braided, wear-resistant and electromagnetic interference resistant sleeve according to claim 8, wherein the metallized wire is a metallized multi-filament.
10. The wrappable, braided, wear-resistant and EMI resistant sleeve of claim 3, wherein the float forms a loop portion of a hook and loop type fastener.