Cable clamp and assembly of cable and clamp
By designing a flexible lining and a metal-edged clamp half, the problem of fixing multiple wires in the aircraft's three-phase seven-wire main feeder harness is solved, achieving high integration, weight reduction, and stable isolation effects, and reducing the risk of arcing.
Patent Information
- Application Number
- CN202422582725.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-10-24
AI Technical Summary
The multiple wire harnesses of the aircraft's three-phase, seven-wire main feeder need to be laid separately and dispersedly. The existing clamp fixing method requires multiple clamps, which increases weight and layout space. In addition, vibration can easily lead to unstable isolation distances and cause arc risks.
A clamp half is designed, which includes a flexible lining part and a edging part. The flexible lining part has multiple grooves for accommodating cables. The edging part is designed as a metal profile to reduce deformation and is fixed by threaded fasteners to achieve high integration and stable isolation.
The number of clamps is reduced, the weight and layout space are reduced, the stability of the isolation distance between cables is improved, the arc risk is reduced, and the reliability of the clamps is improved.
Smart Images
Figure CN223428052U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the electrical harness design field, concretely relates to a clamp for the three-phase seven-wire system main feeder wire of airplane and the assembly including cable and clamp. BACKGROUND
[0002] The three-phase seven-wire system main feeder wire current on the airplane is big, and the integration of multiple main feeder wires into a bundle of harnesses can cause arc and heating problems, cannot be bundled into a bundle of harnesses, so the main feeder wire needs to be isolated and laid separately, and a harness fixing device needs to be laid for each main feeder wire, and at present, the harnesses are fixed one by one by a single clamp on the airplane, and a certain isolation distance is designed to meet the isolation requirement.
[0003] Such design has the following shortcomings:
[0004] 1, a single clamp fixes a single harness, and more clamps are needed to fix the seven main feeder wire harnesses, and multiple clamps are needed for fixation.
[0005] 2, multiple clamps fix this part of the harness, increasing the weight of the airplane;
[0006] 3, for single clamp fixation, a support or fastener connected with the main structure needs to be designed synchronously, increasing the layout space and weight;
[0007] 4, once the numerous clamps are deflected or loosened due to vibration on the airplane, etc., the isolation distance between the main feeder wire harnesses is unstable, which can easily cause arc risk. INVENTION CONTENTS
[0008] The utility model provides a cable clamp, the clamp includes two clamp halves matched with each other, each clamp half includes:
[0009] A flexible lining part, a plurality of grooves are formed on one side of the flexible lining part, the grooves are arranged at intervals along the juxtaposition direction, and the grooves are configured to allow the corresponding grooves of the two assembled clamp halves to cooperate with each other to accommodate the corresponding cables therein, so that the independent power supply code isolation distance between different cables is met, the flexible lining part can be deformed flexibly, and the hardness of at least the part of the flexible lining part in contact with the cable is not more than the hardness of the outer surface of the cable; and
[0010] A covering part, the covering part is embedded in the flexible lining part, the covering part includes a profile extending along the juxtaposition direction, and the cross-sectional shape of the profile is configured to reduce the deformation of the flexible lining part that can cause the grooves to deviate from the juxtaposition direction.
[0011] According to the preferred embodiment of the cable clamp of the utility model, the flexible lining part is composed of a rubber pad.
[0012] According to a preferred embodiment of the cable clamp of the present invention, the edging portion is formed of a metal profile.
[0013] According to a preferred embodiment of the cable clamp of the present invention, the cross-sectional shape of the profile is configured such that the edging portion and the outer surface of the cable accommodated in the groove are spaced apart from each other in the radial direction of the cable.
[0014] According to a preferred embodiment of the cable clamp of the present invention, the cross-sectional shape of the profile includes a bottom edge away from the groove and an opening toward the groove defined by two opposite side walls extending from the bottom edge toward the groove.
[0015] According to a preferred embodiment of the cable clamp of the present invention, the two side walls extend from the bottom edge toward the opening and approach each other.
[0016] According to a preferred embodiment of the cable clamp of the present invention, the maximum width of the profile cross section in the extension direction of the cable does not exceed the width of the flexible lining portion in the extension direction of the cable.
[0017] According to a preferred embodiment of the cable clamp of the present invention, each clamp half includes seven grooves.
[0018] According to a preferred embodiment of the cable clamp of the present invention, the two clamp halves are identical.
[0019] According to a preferred embodiment of the cable clamp of the present invention, the two clamp halves are fastened to each other by threaded fasteners, and the corresponding flexible linings of the two assembled clamp halves at least partially fit each other on the side where the groove is provided.
[0020] In summary, the utility model provides a clamp that can be used for the three-phase seven-wire main feeder line of an aircraft, which can achieve high integration, occupy a small space, reduce weight, is simple to process, and has a light device. It can also reduce the risk of interference between the cable and the metal edge after the rubber pad is deformed due to the stress of cable installation.
[0021] In general, the advantages and effects of the cable clamp of the present invention are at least:
[0022] 1. By adopting integrated clamps, the integration level is improved, the layout space on the aircraft is reduced, the number of clamps on the aircraft is reduced, and the number of fastening devices and brackets for clamp fixing is reduced, thereby achieving weight reduction;
[0023] 2. By designing the metal flange form and the "trapezoidal" edge design on the outermost layer, the risk of interference between the cable and the metal edge after the rubber pad is deformed due to the stress of cable installation is reduced;
[0024] 3. The size matching design of the “trapezoidal” metal edging and the rubber pad can reduce the risk of the metal edging falling off and improve the reliability of the clamp. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] This document includes the accompanying drawings, which are included to provide a further understanding of the various embodiments, and are incorporated in and constitute a part of this specification.
[0026] The drawings illustrate the various embodiments described herein, and together with the description serve to explain the principles and operations of the claimed subject matter.
[0027] With reference to the above purposes, the technical features of the present invention are clearly described below, and its advantages are apparent from the following detailed description with reference to the accompanying drawings, which show preferred embodiments of the present invention by way of example without limiting the scope of the present invention.
[0028] In the attached figure:
[0029] Figure 1 1 is a front exploded schematic diagram of a preferred embodiment of a cable clamp according to the present utility model;
[0030] Figure 2 yes Figure 1 FIG. 1 is a side sectional view of a preferred embodiment of a cable clamp of the present invention taken at a non-groove section.
[0031] Reference Signs List
[0032] 100 Clamp Half
[0033] 110 flexible lining
[0034] 111 groove
[0035] 120 Edge Department
[0036] 121 bottom edge
[0037] 122 sidewall
[0038] X juxtaposition direction DETAILED DESCRIPTION
[0039] Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below.
[0040] Although the present invention will be described in conjunction with exemplary embodiments, it should be appreciated that this description is not intended to limit the present invention to those illustrated embodiments. On the contrary, the present invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of the present invention.
[0041] In order to facilitate explanation and accurately define the technical solutions of the present invention, the terms “upper”, “lower”, “inner” and “outer” are used to describe features of the exemplary embodiments shown in the drawings with reference to their positions.
[0042] Various preferred but non-limiting embodiments of the cable clamp of the present invention will be described in detail below with reference to the accompanying drawings.
[0043] like Figure 1 As shown in FIG, a cable clamp according to the present invention is shown, which includes two clamp halves 100 that match each other. The assembled cable clamp can accommodate a cable (not shown in the figure). It should be noted that Figure 1 (and will be described later Figure 2 ) for clarity of illustration, the two clamp halves 100 are shown as not yet assembled to each other.
[0044] Each clamp half 100 includes a flexible lining portion 110 and a rim portion 120 .
[0045] One side of the flexible lining 110 is provided with multiple grooves 111. In the preferred embodiment shown in the figures, each clamp half 100 includes seven grooves 111 for accommodating a three-phase, seven-wire cable. However, those skilled in the art will appreciate that a single flexible lining 110 may also include more or fewer grooves 111, and such a flexible lining 110 may still be used to accommodate a three-phase, seven-wire cable, either alone or in conjunction with one or more other flexible linings 110. It should also be noted that while the present invention is preferably used to accommodate three-phase, seven-wire cables, those skilled in the art will appreciate that its application is not limited to this application. Within the scope of the present invention, those skilled in the art will be able to select appropriate embodiments to accommodate various multi-cable harnesses. This integrated clamp allows multiple cables to be secured with a single, integrated clamp, facilitating the maintenance of cable spacing between cables. This improves integration, reduces aircraft layout space, and reduces the number of clamps on board, eliminating the need for clamp-fixing devices and brackets, thereby reducing weight.
[0046] In addition, although Figure 1The groove 111 shown in the figure is roughly semicircular, but those skilled in the art can also set the groove 111 in other shapes according to actual needs, such as an arc shape less than half or a square, rectangle, etc., to adapt to different cable cross-sections.
[0047] The groove 111 is arranged along the juxtaposition direction X( Figure 1 The grooves 111 are spaced apart and configured so that the corresponding grooves 111 of the two assembled clamp halves 100 can cooperate with each other to accommodate corresponding cables therein, so that the isolation distance of the independent power code is met between different cables.
[0048] It should be pointed out here that although Figure 1 The grooves 111 are arranged roughly in the same plane, so that the above-mentioned juxtaposition direction X extends roughly in a straight line direction. However, those skilled in the art can also arrange the grooves 111 on a curved surface according to actual needs. At this time, it should be understood that the juxtaposition direction X is a circumferential direction.
[0049] This design of the flexible lining 110 secures and protects the wire harness from wear and tear. It also allows for the integration of multiple main feeder cables into a single clamp, achieving high integration density and reducing onboard space. Furthermore, the relative distances between each aperture are designed based on the aforementioned wire harness isolation distances, preventing arcing and heating issues associated with integrated feeder cables.
[0050] According to a preferred embodiment of the present invention, the two clamp halves 100 are identical. However, this is not required, and those skilled in the art will appreciate that two clamp halves 100 with certain differences can still cooperate with each other as long as a space for accommodating a cable is formed therein.
[0051] Although not shown in the figures, preferably, the two clamp halves 100 can be fastened to each other by threaded fasteners, so that the corresponding flexible linings 110 of the two assembled clamp halves 100 at least partially fit each other on the side where the groove 111 is provided. The threaded fasteners can be provided, for example, at both ends of the clamp halves ( Figure 1 at the left and right ends of the ).
[0052] The flexible lining 110 is capable of flexible deformation to avoid damaging the cable contained therein and the hardness of at least the portion of the flexible lining 110 in contact with the cable does not exceed the hardness of the cable outer surface. Preferably, the hardness of the flexible lining 110 is less than the hardness of the cable outer surface.
[0053] Preferably, the flexible inner lining 110 may be made of a rubber pad. However, those skilled in the art will appreciate that the flexible inner lining 110 may also be made of other common flexible materials or a combination of one or more materials, as long as the contact and mating portion with the cable, such as the inner surface of the groove, meets the aforementioned hardness requirements.
[0054] The following references Figure 1 and Figure 2 The edging portion 120 is embedded in the flexible lining portion 110 and includes a profile extending along the juxtaposition direction X. The cross-sectional shape of the profile is configured to reduce deformation of the flexible lining portion 110 that would cause the groove 111 to deviate from the juxtaposition direction X.
[0055] It should be noted that while the edging profile shown in the figures is a single piece, those skilled in the art may also utilize multiple profiles of the same or different cross-sections to form the edging portion, as needed, as long as the aforementioned requirement of reducing deformation of the flexible lining 110 is met. For example, and as further described below, a "trapezoidal" metal edging can be designed to match the dimensions of the rubber pad, thereby reducing the risk of the metal edging falling off and improving the reliability of the clamp.
[0056] The cross-sectional shape of the profile may include a bottom edge 121 ( Figure 2 The horizontal section) and the two opposite side walls 122 ( Figure 2 An opening toward the groove 111 is defined by a substantially vertical section in the middle.
[0057] The two side walls 122 extend toward the opening from the bottom edge 121. With this design of the metal edging, a "trapezoidal" edging is achieved at the outermost layer, thereby reducing the risk of interference between the cable and the metal edging after the rubber pad is deformed due to cable installation stress.
[0058] Preferably, the edge portion 120 is made of a metal profile.
[0059] The cross-sectional shape of the profile may preferably be configured such that the edging portion 120 and the outer surface of the cable received in the groove 111 are spaced apart from each other in the radial direction of the cable.
[0060] The maximum width of the profile cross section in the extension direction of the cable does not exceed the width of the flexible lining portion 110 in the extension direction of the cable.
[0061] The thus designed edging 120 secures and supports the rubber lining 110, protecting the rubber material and supporting the wiring harness. Furthermore, due to the heavy weight of the feeder itself, the metal flange is designed with a "trapezoidal" outermost edging to reduce the risk of interference between the cable and the metal flange after the rubber pad deforms due to cable installation stress. The "trapezoidal" metal flange, designed to match the dimensions of the rubber lining, also reduces the risk of the metal flange falling off, improving the reliability of the clamp.
[0062] The following briefly introduces the installation steps of the cable clamp according to the utility model:
[0063] a) In the fuselage area where the three-phase seven-wire main feeder is to be arranged, first install the lower half of the clamp on the main structure or related bracket;
[0064] b) Laying the relevant three-phase seven-wire main feeder wire harness on the clamp;
[0065] c) Install the upper clamp on the wiring harness;
[0066] d) Use fasteners such as bolts and nuts to fix the clamp on the left and right sides of the clamp to support and fix the feeder.
[0067] While preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide further embodiments.
[0068] Various changes can readily be made to the embodiments described herein in light of the above detailed description.
[0069] In general, in the claims, the terms used should not be construed as limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which the claims are entitled.
Claims
1. A cable clamp, The clamp comprises two clamp halves (100) that match each other. It is characterized by: Each of the clamp half parts (100) comprises: A flexible lining portion (110), wherein a plurality of grooves (111) are provided on one side of the flexible lining portion (110), the grooves (111) are spaced apart along a juxtaposition direction (X), and the grooves (111) are configured such that corresponding grooves (111) of the two assembled clamp halves (100) can cooperate with each other to accommodate corresponding cables therein, so that the isolation distance of the independent power code is satisfied between different cables, the flexible lining portion (110) can be flexibly deformed to avoid damaging the cable accommodated therein, and the hardness of at least the portion of the flexible lining portion (110) that contacts the cable does not exceed the hardness of the outer surface of the cable; and A rim portion (120) is embedded in the flexible lining portion (110), and the rim portion (120) includes a profile extending along the juxtaposition direction (X), and the cross-sectional shape of the profile is configured to reduce deformation of the flexible lining portion (110) that would cause the groove (111) to deviate from the juxtaposition direction (X).
2. The cable clamp according to claim 1, It is characterized by: The flexible lining portion (110) is composed of a rubber pad.
3. The cable clamp according to claim 1, It is characterized by: The edge portion (120) is made of a metal profile.
4. The cable clamp according to claim 1, It is characterized by: The cross-sectional shape of the profile is configured such that the edge wrapping portion (120) and the outer surface of the cable accommodated in the groove (111) are spaced apart from each other in the radial direction of the cable.
5. The cable clamp according to claim 1, It is characterized by: The cross-sectional shape of the profile includes a bottom edge (121) away from the groove (111) and an opening toward the groove (111) defined by two opposite side walls (122) extending from the bottom edge (121) toward the groove (111).
6. The cable clamp according to claim 5, It is characterized by: The two side walls (122) extend from the bottom edge (121) toward the opening, approaching each other.
7. The cable clamp according to claim 6, It is characterized by: The maximum width of the profile cross section in the extension direction of the cable does not exceed the width of the flexible lining portion (110) in the extension direction of the cable.
8. The cable clamp according to claim 1, It is characterized by: The two clamp halves (100) are identical.
9. A cable and clamp assembly, It is characterized by: include: Three-phase seven-wire main feeder cable; and The cable clamp according to any one of claims 1 to 8, wherein each clamp half (100) comprises seven grooves (111) for respectively accommodating each cable of the three-phase seven-wire main feeder cable.
10. The assembly according to claim 9, It is characterized by: The two clamp halves (100) are fastened to each other by threaded fasteners, and the corresponding flexible linings (110) of the assembled two clamp halves (100) at least partially fit each other on the side where the groove (111) is provided.