An aerospace flame resistant fastener securing assembly

Abstract

The utility model relates to the technical field of fastener, and disclose a aerospace flame -retardant fastener fixed subassembly, including the fixed block of installation on the engine casing, is equipped with the insertion hole on the fixed block, the insertion hole is connected through the fixed part and the first bolt dismounting connection on the engine casing still includes: the fixed ring of arc structure, the fixed ring is connected with the fixed block dismounting, and the fixed ring both ends are equipped with the through -connection hole, magic tape, magic tape has the hook surface and the ring surface of mutual adhesion, magic tape respectively from the through -connection hole in passes through and turns over, and the fixed space that magic tape inner wall and fixed ring inner wall form for fixed cable bundle or pipeline, the utility model discloses the both ends of fixed ring adopt magic tape connection, can form fixed space in the inner wall of magic tape and fixed ring, the cable bundle and the pipeline are fixed to the convenient, and the rubber pad is fixedly connected in the inner wall of fixed ring, not only convenient to assemble and disassemble, but also can reduce the abrasion to cable bundle and pipeline, improve the use effect.

Description

Technical Field

[0001] This utility model relates to the field of hook and fastener technology, specifically to an aerospace flame-retardant hook and fastener fixing assembly. Background Technology

[0002] In the aerospace field, the safety, reliability, and lightweight design of aircraft have always been core pursuits. As the internal systems of modern aircraft and spacecraft become increasingly complex, the outer walls of engine casings are covered with a massive amount of cable bundles and control pipelines. How to efficiently and safely secure and manage these items has become an important issue in engineering design.

[0003] Currently, traditional mechanical fastening methods (such as metal clamps, screws, and cable ties) are secure, but they are generally cumbersome to install and disassemble, time-consuming to operate, and the surface of the fastened object is easily worn, making it difficult to meet the usage requirements. Utility Model Content

[0004] This utility model provides an aerospace flame-retardant hook and loop fastener fixing assembly. By combining a fixing ring and Velcro, it facilitates the fixing of cable bundles and control lines, while reducing surface wear on the cable bundles and control lines. This solves the problems of cumbersome assembly and disassembly and easy wear on the fixed objects mentioned in the background art.

[0005] This utility model provides the following technical solution: A flame-retardant hook and loop fastener assembly for aerospace applications includes a fixing block mounted on an engine housing, the fixing block having a insertion hole that is detachably connected to a first bolt on the engine housing via a fastener; and a fixing ring with an arc-shaped structure, wherein the fixing ring is detachably connected to the fixing block, the fixing ring having a cross-section less than or equal to half an arc, and both ends of the fixing ring having through holes; and hook and loop fasteners having hook and loop surfaces that adhere to each other, the hook and loop fasteners passing through the through holes and folding over, the inner wall of the hook and loop fasteners and the inner wall of the fixing ring forming a fixing space for securing cable bundles or pipelines.

[0006] As a preferred embodiment of this utility model, the through hole includes a first through hole and a second through hole, and the first through hole and the second through hole are symmetrically distributed.

[0007] As a preferred embodiment of this utility model, one end of the hook and loop fastener is fixedly connected to a connecting end, and a through groove is provided at the end of the connecting end. The other end of the hook and loop fastener passes through the through groove to fix the connecting end in the first through hole, and the other end of the hook and loop fastener passes through the second through hole and folds over to form a fixing space for fixing cable bundles or pipelines.

[0008] As a preferred embodiment of this utility model, the material of the hook and loop fastener is polyetheretherketone (PEEK).

[0009] As a preferred embodiment of this invention, a rubber pad is fixedly connected to the inner wall of the fixing ring.

[0010] As a preferred technical solution of this utility model, an installation block is fixedly connected to the outer wall of the fixing ring, a limiting groove is formed on the fixing block, the end of the installation block away from the fixing ring extends into the limiting groove, and the installation block is detachably connected to the limiting groove by a second bolt.

[0011] As a preferred embodiment of this utility model, the side wall of the fixing block is provided with a through threaded hole, and the axis of the threaded hole is perpendicular to and intersects the axis of the insertion hole.

[0012] As a preferred technical solution of this utility model, the first bolt has a through hole on its side wall, and the fastener is inserted from one end of the threaded hole, passes through the through hole and exits from the other end of the threaded hole.

[0013] Compared with the prior art, this utility model provides an aerospace flame-retardant hook and loop fastener fixing assembly, which has the following beneficial effects: 1. In this aerospace flame-retardant hook and loop fastener assembly, a semi-circular ring is detached and connected to the fixing block. The two ends of the fixing ring are connected with Velcro, which can form a fixing space between the Velcro and the inner wall of the fixing ring, making it convenient to fix cable bundles and pipelines. In addition, a rubber pad is fixedly connected to the inner wall of the fixing ring, which not only makes it easy to install and remove, but also reduces wear on cable bundles and pipelines and improves the performance.

[0014] 2. In this aerospace flame-retardant hook and loop fastener fixing assembly, the mounting block is installed in the limiting groove by opening a limiting groove on the fixing block, which is convenient for installation and disassembly. The fixing ring with different inner diameters can be replaced as needed to expand the scope of application.

[0015] The parts of this device not described herein are the same as or can be implemented using existing technology. This utility model uses Velcro connections at both ends of the fixing ring, which can form a fixing space between the Velcro and the inner wall of the fixing ring, making it convenient to fix the cable bundle and pipeline. In addition, a rubber pad is fixedly connected to the inner wall of the fixing ring, which not only makes it easy to install and remove, but also reduces wear on the cable bundle and pipeline, and improves the performance. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0017] Figure 1 This is a first-person perspective perspective view of the present invention. Figure 2 This is a two-dimensional perspective view of the present invention. Figure 3 This is a three-dimensional schematic diagram of the fixing ring of this utility model; Figure 4 This is a plan view of the present invention.

[0018] In the diagram: 1. Fixing block; 101. Insertion hole; 102. Threaded hole; 103. Limiting groove; 2. Mounting block; 201. Fixing ring; 202. First through hole; 203. Second through hole; 3. Velcro; 301. Connecting end; 302. Through groove; 4. Rubber pad. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example: Reference Figures 1-4An aerospace flame-retardant hook and loop fastener assembly includes a fixing block 1 mounted on an engine housing. The fixing block 1 has a insertion hole 101, which is detachably connected to a first bolt on the engine housing via a fastener. Here, the aircraft engine housing is divided into an upper housing and a lower housing, and flange plates are fixedly connected to the connection between the upper and lower housings. These are secured by multiple first bolts, with nuts abutting against the connecting plate of the lower housing via spring washers to prevent loosening and ensure fixation. A through threaded hole 102 is provided on the side wall of the fixing block 1, and the axis of the threaded hole 102 is perpendicular to and intersects the axis of the insertion hole 101, meaning the threaded hole 102 penetrates the fixing block 1 and passes through the insertion hole 101. A through hole is provided on the side wall of the first bolt, near the end of the nut. The distance between the axis of the through hole and the bottom end face of the nut is equal to half the thickness of the fixing block 1, i.e., the distance between the axis of the threaded hole 102 and the top or bottom end face of the fixing block 1. The fixing element is inserted into the threaded hole 102 from one end, passes through the through hole, and exits from the other end of the threaded hole 102. The fixing element can be a pin, a Bailey pin, or a third bolt, preferably a third bolt. In use, the insertion hole 101 of the fixing block 1 is fitted onto the first bolt, and then the third bolt is threaded into the threaded hole 102 and exits from the through hole on the first bolt. At this time, the fixing block 1 is fixed to the first bolt, and the top end face of the fixing block 1 abuts against the bottom end face of the nut, which can further prevent the nut from loosening and improve the use effect. In addition, during use, the axis of the through hole on the first bolt is made perpendicular to the side of the flange plate beforehand, that is, the projection of the through hole is circular in the front projection. It also includes: a curved fixing ring 201, which is detachably connected to the fixing block 1. The cross-section of the fixing ring 201 is less than or equal to half a circle, preferably equal to half a circle, and through holes are provided at both ends of the fixing ring 201; and hook and loop fastener 3, which is made of polyetheretherketone (PEEK), intrinsically flame retardant (UL94 V-0), with a long-term operating temperature up to 260°C, high strength, high rigidity, wear resistance, chemical corrosion resistance (fire retardant, lubricant), and low smoke and low toxicity. The thickness of the hook and loop fastener 3 is typically 0.5–0.8 mm, preferably 0.6 mm. Through the thin-wall design, the required flexibility and bendability are achieved while ensuring the high strength of the PEEK material. The hook and loop fastener 3 has hook and loop surfaces that adhere to each other. The hook and loop fastener 3 passes through the through holes and is folded over. The inner wall of the hook and loop fastener 3 and the inner wall of the retaining ring 201 form a fixing space for fixing cable bundles or pipes. That is, one end of the hook and loop fastener 3 is fixedly connected to one of the through holes, and then it passes through the other through hole and is folded over, so that the hook and loop surfaces adhere to each other. The inner wall of the hook and loop fastener 3 and the inner wall of the retaining ring 201 form a fixing space for fixing cable bundles or pipes, which has the effects of easy installation and removal and reliable fixing.

[0021] In use, the fixing ring 201, which is a semi-circular ring structure, is disassembled and connected to the fixing block 1. The two ends of the fixing ring 201 are connected by Velcro 3, which can form a fixing space between the Velcro 3 and the inner wall of the fixing ring 201, making it convenient to fix the cable bundle and pipeline. In addition, a rubber pad 4 is fixedly connected to the inner wall of the fixing ring 201, which not only makes it easy to install and remove, but also reduces the wear of the cable bundle and pipeline, and improves the performance.

[0022] Reference Figure 3 For ease of description, the through holes are divided into a first through hole 202 and a second through hole 203, and the first through hole 202 and the second through hole 203 are symmetrically distributed.

[0023] Reference Figures 1-3 A connecting end 301 is fixedly connected to one end of the hook and loop fastener 3. A through groove 302 is provided at the end of the connecting end 301, that is, a through groove 302 is provided at the end of the connecting end 301 away from the hook and loop fastener 3. The other end of the hook and loop fastener 3 passes through the through groove 302 to fix the connecting end 301 in the first through hole 202. The other end of the hook and loop fastener 3 passes through the second through hole 203 and is folded to form a fixing space for fixing cable bundles or pipelines. The hook and loop fastener 3 and the fixing ring 201 are easy to install and remove, and the fixing is reliable, which can improve the efficiency of installation and removal.

[0024] Reference Figures 1-3 A rubber pad 4 is fixedly connected to the inner wall of the fixing ring 201. The inner wall of the rubber pad 4 abuts against the outer wall of the cable bundle and pipeline, which can reduce the wear on the cable bundle and pipeline. The material of the rubber pad 4 is preferably silicone rubber. Silicone rubber itself has intrinsic flame retardancy. When burning, it forms a silicon dioxide (SiO2) protective layer, which prevents the flame from spreading, does not produce molten droplets, and emits very little smoke and toxic gas. It can usually reach (UL94 V-0) or close to the flame retardant level.

[0025] Reference Figures 1-3 A mounting block 2 is fixedly connected to the outer wall of the fixing ring 201. A limiting groove 103 is formed on the fixing block 1. The end of the mounting block 2 away from the fixing ring 201 extends into the limiting groove 103. The mounting block 2 is detachably connected to the limiting groove 103 via a second bolt, making assembly and disassembly convenient. This allows for the replacement of fixing rings 201 with different inner diameters, expanding its applicability. The fixing block 1, mounting block 2, and fixing ring 201 are all made of polyetheretherketone (PEEK). The wall thickness of the fixing block 1, mounting block 2, and fixing ring 201 can reach 1–5 mm or even thicker. With increased thickness, its bending and compressive stiffness increase exponentially. Therefore, even if made of the same material (PEEK), it will be very rigid and cannot be bent by hand.

[0026] Components not described in detail in this article are existing technologies.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An aerospace flame-retardant hook and loop fastener assembly, comprising a fixing block (1) mounted on an engine housing, characterized in that, The fixing block (1) has a insertion hole (101), which is detachably connected to the first bolt on the engine housing via a fixing member, and also includes: A fixed ring (201) with an arc-shaped structure. The fixing ring (201) is detachably connected to the fixing block (1). The cross-section of the fixing ring (201) is less than or equal to half a circular arc, and both ends of the fixing ring (201) are provided with through holes. The hook and loop fastener (3) has hook and loop surfaces that adhere to each other. The hook and loop fastener (3) passes through and folds through the through hole. The inner wall of the hook and loop fastener (3) and the inner wall of the fixing ring (201) form a fixing space for fixing cable bundles or pipelines.

2. The aerospace flame-retardant hook and loop fastener assembly according to claim 1, characterized in that, The through hole includes a first through hole (202) and a second through hole (203), and the first through hole (202) and the second through hole (203) are symmetrically distributed.

3. The aerospace flame-retardant hook and loop fastener fixing assembly according to claim 2, characterized in that, The Velcro (3) has a connecting end (301) fixedly connected to one end. The end of the connecting end (301) has a through groove (302). The other end of the Velcro (3) passes through the through groove (302) to fix the connecting end (301) in the first through hole (202). The other end of the Velcro (3) passes through the second through hole (203) and is folded to form a fixed space for fixing cable bundles or pipelines.

4. The aerospace flame-retardant hook and loop fastener fixing assembly according to claim 1, characterized in that, The material of the Velcro (3) is polyetheretherketone.

5. The aerospace flame-retardant hook and loop fastener fixing assembly according to claim 1, characterized in that, A rubber pad (4) is fixedly connected to the inner wall of the fixing ring (201).

6. The aerospace flame-retardant hook and loop fastener fixing assembly according to claim 1, characterized in that, The outer wall of the fixing ring (201) is fixedly connected to the mounting block (2). A limiting groove (103) is opened on the fixing block (1). One end of the mounting block (2) away from the fixing ring (201) extends into the limiting groove (103). The mounting block (2) is detached from the limiting groove (103) by a second bolt.

7. The aerospace flame-retardant hook and loop fastener fixing assembly according to claim 1, characterized in that, The side wall of the fixing block (1) is provided with a through threaded hole (102), and the axis of the threaded hole (102) is perpendicular to and intersects the axis of the insertion hole (101).

8. The aerospace flame-retardant hook and loop fastener fixing assembly according to claim 7, characterized in that, The first bolt has a through hole on its side wall. The fastener is inserted into the threaded hole (102) from one end and passes through the through hole to exit from the other end of the threaded hole (102).

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