Cable line load bearing structure and method of assembly thereof

Abstract

The application discloses a cable load-bearing structure and an assembling method thereof, and relates to the technical field of sensor production and manufacturing. The cable load-bearing structure comprises a cable shell connected with the end of a cable through a gluing mode, a connector and a cable fastening head installed at the two ends of the cable shell, and the cable shell comprises a hollow cylindrical structure. A plurality of cutting lines are arranged on the inner wall surface of the middle part of the hollow cylindrical structure in parallel along the axial direction to form a rough surface. The end surface of the cable is polished to be rough and then fixed in the cable shell through the gluing mode, so that the overall load-bearing of the cable and the cable shell is realized. The cable is fixed in the cable shell through the gluing mode, the overall load-bearing is realized by replacing the traditional structure fixing technology, the overall stress load-bearing effect is realized, the load-bearing capacity is increased, the shear force load-bearing between the cable and the cable shell is realized by using glue, and the material quality limitation caused by the load-bearing of the Kevlar or steel wire rope in the cable is excluded.

Description

Technical Field

[0001] This invention relates to the field of sensor manufacturing technology, and in particular to a cable load-bearing structure and its assembly method. Background Technology

[0002] In the current manufacturing process of sensor products, the load-bearing capacity is still mainly determined by traditional structural fixing methods. For example, cable products use steel wire ropes or Kevlar as load-bearing materials and use structural fixing tools such as U-shaped clips and figure-eight buckles to fix them to the product as a whole, thereby bearing the load.

[0003] Existing cable load-bearing technology has the following defects and shortcomings:

[0004] 1. The existing sensor cable consists of multiple strands of cable conductors and load-bearing materials (multi-strand Kevlar or steel wire rope, etc.) twisted together before being covered with an outer sheath. Its load-bearing method depends entirely on the performance and quality of the load-bearing materials inside the cable, and its load-bearing capacity is limited, which cannot meet the large load-bearing requirements on site.

[0005] Second, since the load-bearing structure inside the cable and the cable conductors are under the same force, the tensile process after being stressed will also cause a certain degree of interference and damage to the internal conductors, which will adversely affect the transmission of signals within the conductors. Summary of the Invention

[0006] The purpose of this invention is to provide a cable load-bearing structure and its assembly method to solve the above-mentioned technical problems.

[0007] The technical solution adopted in this invention is as follows:

[0008] A cable load-bearing structure includes a cable housing connected to the ends of a cable by adhesive bonding, and connectors and cable fasteners installed at both ends of the cable housing. The cable housing includes a hollow cylindrical structure, and the inner wall surface of the hollow cylindrical structure has several cutting grooves arranged in parallel along the axial direction to form a rough surface. The end surface of the cable is roughened by grinding and then fixed in the cable housing by adhesive bonding to achieve overall load-bearing of the cable and the cable housing.

[0009] Preferably, the inner walls of both ends of the hollow cylindrical structure are provided with internal threads for screwing into the connector and the cable fastener, respectively, and the diameter of the hole at the end of the hollow cylindrical structure connected to the connector is larger than the diameter of the hole at the other end connected to the cable fastener.

[0010] Preferably, the depth of some of the cutting patterns is at least 0.5 mm, and the spacing between two adjacent cutting patterns is at least 1 mm.

[0011] Preferably, the total length of the cable housing is at least 90mm, so that the potting depth is not less than 60mm, in order to meet the load-bearing requirements.

[0012] Preferably, the length of the outer sheath surface of the cable end is the same as the total length of the cable housing, the connector and the cable fastening head, and the grinding depth is 1-2mm.

[0013] As a further preferred embodiment, the conductors inside the cable and the Kevlar rope or steel wire rope at least partially extend out of the outer sheath of the cable, and the conductors are welded to the connector.

[0014] As a further preferred embodiment, it also includes a flat pad and a spring washer. Several Kevlar ropes are braided into a braid and pass through the flat pad together with several of the wires. After passing through the flat pad, the Kevlar ropes are connected and fixed to the spring washer. The size of the flat pad is larger than the diameter of the hole at the other end of the hollow cylindrical structure connected to the cable fastening head. The size of the spring washer is larger than the size of the through hole on the flat pad.

[0015] In the event of a failure of the adhesive load-bearing capacity, the spring washer is engaged with the flat washer to prevent the conductors and Kevlar inside the cable from detaching from the outer sheath of the cable. Furthermore, the flat washer is engaged with the other end of the hollow cylindrical structure to prevent the entire cable from detaching from the cable housing, thus forming a secondary anti-mistake load-bearing capacity.

[0016] A method for assembling a cable load-bearing structure, the assembly method comprising:

[0017] S1. Remove a portion of the outer sheath of the cable at the end of the cable to expose the internal conductors and Kevlar rope, cut off a portion of the conductors, and then braid the Kevlar rope into a braid.

[0018] S2. Pass the end of the cable through the cable fastener, the hollow cylindrical structure and the connector in sequence, and then polish the surface of the outer sheath of the cable end.

[0019] S3. Pass the exposed wires and Kevlar ropes through the flat pad together, then connect and fix the Kevlar ropes to the spring washer, and solder the wires to the connector.

[0020] S4. Then screw the connector onto the hollow cylindrical structure and pour glue into the inside of the cable housing to fill the gap between the cable and the inner cavity of the cable housing. Then place the cable housing vertically, remove air bubbles, and continue until the glue is completely cured.

[0021] As a further preferred option, in S2, during the grinding process of the outer sheath of the cable end, the grinding thickness is such that the outer sheath of the cable is not torn and the internal steel wire shielding mesh is exposed.

[0022] As a further preferred option, in S4, polyurethane adhesive is used.

[0023] The above technical solution has the following advantages or beneficial effects:

[0024] (1) In this invention, by setting up the cable housing, the cable is fixed inside the cable housing by adhesive bonding, which replaces the traditional structural fixing technology to achieve overall load bearing and achieve the overall load bearing effect, thereby increasing the load-bearing capacity;

[0025] (2) In this invention, the cable is connected to the cable shell by adhesive, and the shear force between the cable and the cable shell is achieved by adhesive, thus eliminating the material quality limitations caused by the internal Kevlar or steel wire rope of the cable in the existing method.

[0026] (3) In this invention, the tensile interference caused to the internal conductors when Kevlar or steel wire rope is used for load-bearing in the original method can be effectively avoided, thus ensuring the communication performance of the product. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the cable housing structure in this invention;

[0028] Figure 2 This is an exploded view of the cable load-bearing structure in this invention;

[0029] In the diagram: 1. Cable; 2. Cable housing; 3. Connector; 4. Cable fastener; 5. Cutting groove; 6. Conductor; 7. Kevlar rope; 8. Flat washer; 9. Spring washer. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Figure 1 This is a schematic diagram of the cable housing structure in this invention; Figure 2 This is an exploded view of the cable load-bearing structure in this invention. Please refer to [link / reference]. Figures 1 to 2 The diagram illustrates a preferred embodiment of a cable load-bearing structure, comprising a cable housing 2 connected to the end of a cable 1 via adhesive bonding, and connectors 3 and cable fastening heads 4 installed at both ends of the cable housing 2. The cable housing 2 comprises a hollow cylindrical structure, with several axially arranged cutting grooves 5 forming a roughened surface on the inner wall surface of the central portion of the hollow cylindrical structure. The end surface of the cable 1 is roughened by grinding and then fixed to the cable housing 2 via adhesive bonding, thereby achieving overall load-bearing capacity for the cable 1 and the cable housing 2. In this embodiment, the cable housing 2 and the cable 1 are connected and fixed by adhesive. This adhesive connection achieves shear force load-bearing capacity between the cable 1 and the cable housing 2, eliminating the material quality limitations imposed by the internal Kevlar rope 7 or steel wire rope load-bearing of the cable 1. This allows for the use of lighter and more lightweight outer and inner sheathing materials, reducing costs. Furthermore, it avoids the tensile interference caused to the internal conductors 6 by Kevlar or steel wire rope load-bearing in the original method, ensuring the communication performance of the product.

[0034] In this embodiment, the cable housing 2 includes a hollow cylindrical structure with internal threads on the inner walls at both ends. A connector 3 is threaded to one end of the hollow cylindrical structure, and a cable fastening head 4 is threaded to the other end, allowing for assembly of the connector 3 and cable fastening head 4 with the hollow cylindrical structure to form a complete cable housing 2. Furthermore, the openings at the two ends of the cable housing 2 have different diameters. In this example, the diameter at the end of the hollow cylindrical structure connected to the connector 3 is larger than the diameter at the end connected to the cable fastening head 4, to prevent the flat washer 8 and the spring washer 9 from detaching from the cable housing 2 under overall stress.

[0035] In this embodiment, several cutting lines 5 are arranged in parallel along the axial direction on the inner wall surface of the hollow cylindrical structure, except for the position of the internal thread. The several cutting lines 5 form a rough surface to increase the adhesion of the glue and facilitate the stability of the connection between the cable 1 and the cable shell 2.

[0036] Furthermore, as a preferred embodiment, the depth of the plurality of cutting grooves 5 is at least 0.5 mm, and the spacing between two adjacent cutting grooves 5 is at least 1 mm. In this embodiment, the depth of the cutting grooves 5 is preferably 0.5 mm, which can be selected according to the thickness of the outer sheath of the cable 1, while the spacing between two cutting grooves 5 can preferably be 1 mm.

[0037] Furthermore, as a preferred embodiment, the total length of the cable housing 2 is at least 90mm. In this embodiment, the total length of the cable housing 2 is increased from the original 60mm to the current 90mm to increase the bonding area between the cable 1, the cable housing 2, and the adhesive, thereby achieving a stable connection between the cable 1 and the cable housing 2. For a cable 1 with a diameter of 7.8mm, the original 60mm cable housing 2 has an adhesive depth of approximately 3cm. Experimental verification shows that an adhesive depth of 3cm cannot meet the load-bearing requirement of 600N (specified requirement). Under the same inner diameter, at least 5cm of adhesive is needed to meet the load-bearing requirement. Therefore, increasing the overall length of the cable housing 2 to 90mm increases the adhesive depth to 6cm, which meets the usage requirements.

[0038] Furthermore, as a preferred embodiment, the length of the surface grinding at the end of cable 1 is the same as the total length of cable housing 2, connector 3, and cable fastening head 4, and the grinding depth is 1-2mm. In other embodiments, the grinding length of the outer sheath of cable 1 at the end of cable 1 can match the total length of cable housing 2, and can be controlled between 8-9cm, with a depth controlled between 1-2mm. Preferably, the grinding length is 9cm and the depth is 2mm. Secondly, the outer surface of the outer sheath of cable 1 at the end of cable 1 needs to be ground until the surface is rough, which can improve the shear force between cable 1 and the adhesive bonding surface. During this process, the outer sheath of cable 1 should not be torn to expose the internal steel wire shielding mesh. Simultaneously, the Kevlar inside cable 1 is retained as a secondary load-bearing structure to prevent accidental failure. In the event of failure of the primary adhesive load-bearing structure, it works in conjunction with the flat washer 8 to provide short-term load-bearing and accident-proofing. Under normal circumstances, the Kevlar is not under load, which also prevents interference and load-bearing tension on the internal conductors 6.

[0039] Furthermore, as a preferred embodiment, at least part of the conductors 6 and Kevlar ropes 7 or steel wire ropes inside the cable 1 extend out of the outer sheath of the cable 1, and the conductors 6 are welded to the connector 3. Several Kevlar ropes 7 are braided and then pass through the flat pad 8 together with several conductors 6, and after passing through the flat pad 8, the Kevlar ropes 7 are connected and fixed to the spring washer 9. The end of the Kevlar rope 7 is wrapped around the spring washer 9 and knotted tightly. Then, the flat pad 8 and the spring washer 9 are placed inside the cable housing 2. Since the end of the Kevlar rope 7 is connected to the spring washer 9 and knotted, when the primary adhesive load-bearing fails, the spring washer 9 is precisely locked onto the flat pad 8, effectively preventing the conductors and Kevlar inside the cable 1 from detaching from the cable. In addition, the mutual locking and cooperation of the Kevlar rope 7, the spring washer 9, the flat pad 8 and the hole at the other end of the hollow cylindrical structure form a secondary anti-mistake load-bearing structure, preventing the cable 1 from directly detaching from the cable housing 2. The cable housing 2 has different hole diameters at both ends. The hole diameter at the end connected to the connector 3 is larger, while the hole diameter at the end connected to the cable fastening head 4 is smaller. After the flat washer 8 and the spring washer 9 are installed inside the cable housing 2, when the adhesive load-bearing fails once, the cable 1 can pull the flat washer 8 and the spring washer 9 to lock onto the other end of the cable housing 2, preventing the cable 1 from detaching from the cable housing 2. This forms a double locking connection, preventing the cable from being further torn off due to excessive load.

[0040] The preferred assembly method of the load-bearing structure of the cable 1 of the present invention will be described below, but this does not limit the use and scope of protection of the present invention.

[0041] A method for assembling a load-bearing structure of a cable 1, the assembly method comprising:

[0042] S1. Remove a portion of the outer sheath of cable 1 at one end to expose the internal conductors 6 and Kevlar ropes 7. Cut off a portion of the conductors 6 and then braid the Kevlar ropes 7. Specifically, first remove about 15cm of the outer sheath and internal steel wire shielding mesh from the end of cable 1 to expose the four internal conductors 6 and multiple strands of Kevlar ropes 7. Cut the conductors 6 to 2-3cm and then braid the multiple strands of Kevlar ropes 7.

[0043] S2. Pass the end of cable 1 through the cable fastening head 4, the hollow cylindrical structure and the connector 3 in sequence. Then grind the surface of the outer sheath of cable 1 at the end of cable 1. During the grinding process, do not scratch the outer sheath of cable 1 to expose the internal steel wire shielding mesh.

[0044] S3. Pass the exposed conductor 6 and Kevlar rope 7 from the end of cable 1 through the flat washer 8, then connect and fix the Kevlar rope 7 to the spring washer 9, and solder the conductor 6 to the connector 3. The conductor 6 does not pass through the spring washer 9, while the Kevlar rope 7 passes through the spring washer 9 and is knotted to connect and fix it to the spring washer 9.

[0045] S4. Then tighten the connector 3 onto the hollow cylindrical structure and pour glue into the inside of the cable housing 2 to fill the gap between the cable 1 and the inner cavity of the cable housing 2. Then place the cable housing 2 vertically, remove air bubbles, and wait until the glue is completely cured.

[0046] In step S4, after the wire 6 is welded to the connector 3, the cable 1 is pulled so that the cable 1 drives the flat washer 8 and the spring washer 9 into the cable housing 2. Then the connector 3 and the cable fastening head 4 are tightened. Finally, the polyurethane adhesive is poured into the inner cavity of the cable housing 2 and the adhesive is allowed to cure completely.

[0047] After actual testing, the overall load-bearing structure of this invention did not fail under a load of 69.6 kg, and can fully meet the production requirement of a load-bearing capacity of 600 N.

[0048] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A cable load-bearing structure, characterized in that, The cable housing is attached to the ends of the cable by adhesive bonding, and connectors and cable fasteners are installed at both ends of the cable housing. The cable housing has a hollow cylindrical structure. The inner wall surface of the hollow cylindrical structure has several cutting lines arranged in parallel along the axial direction to form a rough surface. The end surface of the cable is roughened by grinding and then fixed in the cable housing by adhesive bonding to achieve the overall load-bearing capacity of the cable and the cable housing. The hollow cylindrical structure has internal threads on the inner walls of both ends for screwing into the connector and the cable fastening head respectively, and the diameter of the hole at the end of the hollow cylindrical structure connected to the connector is larger than the diameter of the hole at the other end connected to the cable fastening head. The conductors inside the cable and the Kevlar rope or steel wire rope at least partially extend out of the outer sheath of the cable, and the conductors are welded to the connector. It also includes a flat pad and a spring washer. Several Kevlar ropes are braided and pass through the flat pad together with several wires. After passing through the flat pad, the Kevlar ropes are connected and fixed to the spring washer. The size of the flat pad is larger than the diameter of the hole at the other end of the hollow cylindrical structure connected to the cable fastening head. The size of the spring washer is larger than the size of the through hole on the flat pad.

2. The cable load-bearing structure as described in claim 1, characterized in that, The depth of some of the cutting patterns is at least 0.5 mm, and the spacing between two adjacent cutting patterns is at least 1 mm.

3. The cable load-bearing structure as described in claim 1, characterized in that, The total length of the cable housing is at least 90mm, so that the potting depth is not less than 60mm to meet the load-bearing requirements.

4. The cable load-bearing structure as described in claim 1, characterized in that, The length of the end surface of the cable after grinding is the same as the total length of the cable housing, the connector and the cable fastening head, and the grinding depth is 1-2mm.

5. A method for assembling a cable load-bearing structure, characterized in that: The cable load-bearing structure includes the cable load-bearing structure according to any one of claims 1-4, and the assembly method includes: S1. Remove a portion of the outer sheath of the cable at the end of the cable to expose the internal conductors and Kevlar rope, cut off a portion of the conductors, and then braid the Kevlar rope into a braid. S2. Pass the end of the cable through the cable fastener, the hollow cylindrical structure and the connector in sequence, and then polish the surface of the outer sheath of the cable end. S3. Pass the exposed wires and Kevlar ropes through the flat pad together, then connect and fix the Kevlar ropes to the spring washer, and solder the wires to the connector. S4. Then screw the connector onto the hollow cylindrical structure and pour glue into the inside of the cable housing to fill the gap between the cable and the inner cavity of the cable housing. Then place the cable housing vertically, remove air bubbles, and continue until the glue is completely cured.

6. The assembly method of the cable load-bearing structure as described in claim 5, characterized in that, In S2, during the grinding process of the outer sheath of the cable at the cable end, the grinding thickness should be such that the outer sheath of the cable is not torn and the internal steel wire shielding mesh is exposed.

7. The assembly method of the cable load-bearing structure as described in claim 5, characterized in that, In S4, polyurethane adhesive is used.

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