A kind of bending-resistant flexible cable

Abstract

The present invention is used in the field of cable technology, and discloses a bending-resistant flexible cable, including a central rubber segment, both ends of the central rubber segment are fixedly connected to one end of a ring-shaped engineering plastic segment, and the other end of the engineering plastic segment is fixedly connected to a protective rubber segment, and the protective rubber segment is designed to be tubular, and cables are arranged inside the central rubber segment, the engineering plastic segment and the protective rubber segment, and a directional limiting mechanism is arranged on the inner surface of the engineering plastic segment, and the damage to the cable when it is bent is reduced by controlling the cable winding direction and winding degree. The bending-resistant flexible cable adopts a method of spirally winding the cable inside the outer layer protection composed of the central rubber segment, the engineering plastic segment and the protective rubber segment, and utilizes a method of unwinding the spiral winding state of the cable when the cable is bent, so that the cable can be extended in length by unfolding, so that the insulating layer on the surface of the cable will not be stretched and squeezed when the cable is bent.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a bending-resistant flexible cable. Background Art

[0002] In today's era of rapid technological development, electrical equipment and electronic systems are widely used in various fields. From complex mechanical equipment in industrial production to various smart electronic devices in people's daily lives, cables bear the indispensable task of power and signal transmission. However, with the continuous expansion and diversification of application scenarios, the working environment of cables is becoming increasingly complex, and the requirements for their performance, especially flexibility and bending resistance, have reached unprecedented heights. Traditional cables are exposed to many serious problems when facing frequent bending or continuous dynamic bending. Due to the lack of specially designed effective protection and limiting structures, the internal cables will suffer various forms of damage during the bending process. For example, when the cable is bent, the cables will produce excessive stretching, extrusion and twisting due to uncontrolled relative displacement. This disordered relative movement makes the insulation layer of the cable extremely easy to be damaged. Once the insulation layer is damaged, it may cause electrical faults such as short circuits, seriously affecting the equipment. At the same time, the conductor is also facing the risk of breaking under repeated excessive stress, which will not only lead to signal transmission interruption and power supply obstruction, but also greatly shorten the service life of the cable. Taking the industrial field as an example, at the moving joints of industrial robots, the cables need to bend and deform continuously with the flexible movements of the robots. Traditional cables are difficult to adapt to such frequent and large bending requirements, and often experience performance degradation or even failure in a short period of time, causing the robot to shut down for maintenance, seriously affecting production efficiency and increasing the company's operating costs. Similarly, in the flexible transmission link on the automated production line, the insufficient bending resistance of the cable will also become a bottleneck restricting the efficient and stable operation of the production line. In addition, in the field of consumer electronics, such as wearable electronic devices, their connecting cables need to maintain good performance during human movement, but the fragility of traditional cables limits the comfort and reliability of wearable devices, and hinders the further popularization and development of related products. Summary of the invention

[0003] The purpose of the present invention is to provide a bending-resistant flexible cable to solve the problem that the internal cables of the traditional cables proposed in the above background technology are easily damaged, the insulation layer is easily damaged, and the conductor is easily broken under frequent bending or dynamic bending conditions, resulting in frequent electrical failures, shortened service life, increased equipment maintenance costs and increased downtime risks.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a bending-resistant flexible cable, comprising a central rubber segment, two ends of the central rubber segment are fixedly connected to one end of a ring-shaped engineering plastic segment, and the other end of the engineering plastic segment is fixedly connected to a protective rubber segment, and the protective rubber segment is tubular in design, and cables are arranged inside the central rubber segment, the engineering plastic segment and the protective rubber segment, and a directional limiting mechanism is arranged on the inner surface of the engineering plastic segment, so as to reduce the damage of the cable when it is bent by controlling the winding direction and winding degree of the cable;

[0005] The directional limiting mechanism includes: a functional ring, which is rotatably mounted on the inner surface of the engineering plastic segment, and a limiting ring is fixedly arranged on the inner surface of the functional ring, an annular groove is opened on the outer surface of the functional ring on one side facing the central rubber segment, and a tooth block is fixedly arranged inside the annular groove on the side surface of the functional ring, a fixing column is fixedly arranged in the middle of the outer surface of one side of the central rubber segment, a functional box is fixedly arranged on the outer surface of the engineering plastic segment, and one end of the center rod is rotatably connected inside the function box, and the other end of the center rod passes through the inner surface of the engineering plastic segment, one end of the center rod located on the inner side of the engineering plastic segment is fixedly connected to a driving gear, a coil spring is connected between the outer surface of the upper end of the center rod and the inner surface of the function box, one end of a connecting chain is fixedly connected to the outer surface of the upper end of the center rod, and the other end of the connecting chain passes through the outer surface of the function box, and one end of the connecting chain located outside the function box is fixedly connected to the fixing column.

[0006] Preferably, the limiting rings are evenly arranged on the inner surface of the functional ring, and the limiting rings and the cables are arranged in a one-to-one correspondence, and the cables pass through the limiting rings.

[0007] By adopting the above technical solution, the functional ring can stably limit the cable through the limiting ring.

[0008] Preferably, the limiting rings passing through the two ends of the same cable are concentrically arranged, and the end of the cable located between the two functional rings is spirally arranged.

[0009] By adopting the above technical solution, the cable can be extended in length by the spiral arrangement when being unfolded to prevent the insulation skin from being bent and damaged.

[0010] Preferably, the tooth blocks are evenly arranged inside the annular groove of the function ring, and the function ring is meshed and connected with the driving gear through the tooth blocks.

[0011] By adopting the above technical solution, the driving gear can drive the functional ring to rotate through the gear block.

[0012] Preferably, a disc-shaped protrusion is provided on the upper end of the center rod, and the connection between the center rod and the connecting chain is located between the two disc-shaped protrusions, and one end of the connecting chain is wrapped around the outer surface of the center rod between the two disc-shaped protrusions.

[0013] By adopting the above technical solution, the connecting chain can pull the central rod to drive the driving gear to rotate.

[0014] Preferably, an annular groove is formed on the inner surface of the central rubber segment, and a central reinforcing plate is fixedly connected to the interior of the annular groove of the central rubber segment.

[0015] By adopting the above technical solution, the central rubber section can be bent in a designated area.

[0016] Preferably, the central reinforcing plate is a circular ring with hollow ends, and one end of a movable reinforcing plate is slidably connected inside the two ends of the central reinforcing plate, and a spring is connected between the movable reinforcing plate and the central reinforcing plate.

[0017] By adopting the above technical solution, the central reinforcement plate can support the movable reinforcement plate through the spring to ensure the protection effect of the weak position of the central rubber section.

[0018] Preferably, the central reinforcing plate, the movable reinforcing plate and the central rubber segment are concentrically arranged, and one end of the movable reinforcing plate away from the central reinforcing plate is in contact with the inner surface of the groove inside the central rubber segment.

[0019] By adopting the above technical solution, the movable reinforcing plate can be retracted into the central reinforcing plate when the central rubber section is bent without affecting the bending of the central rubber section.

[0020] Compared with the prior art, the present invention has the following beneficial effects: the anti-bending flexible cable:

[0021] 1. The cable is spirally wound in the outer protective layer composed of the central rubber section, the engineering plastic section and the protective rubber section. The spiral winding state of the cable is untied when the cable is bent, so that the cable can be extended by unfolding. Therefore, when the cable is bent, the insulation layer on the cable surface will not be stretched and squeezed, thereby ensuring that the integrity of the insulation layer on the cable surface will not be damaged;

[0022] 2. The functional ring limits the winding state of the cable through the limit ring, so that the cable can maintain a stable spiral winding state, thereby preventing the cable spiral state from being destroyed due to the movement of the internal cable during long-term use, thereby ensuring that the cable can be in a stable spiral state when the cable is bent to avoid damage to the insulation skin;

[0023] Furthermore, by changing the distance between the two ends of the central rubber section when the cable is bent, the fixed column can drive the central rod to rotate through the connecting chain, so that the central rod can drive the functional ring to actively rotate when the cable is bent through the engagement of the driving gear and the tooth block, so that the cable can be untwisted more smoothly;

[0024] 3. An annular groove is provided on the inner surface of the middle section of the central rubber section so that the central rubber section can be bent at a specified position in this way, so that the central rubber section can accurately match the cable so that the cable will not be damaged due to being bent at other positions;

[0025] Furthermore, the movable reinforcing plate cooperates with the central reinforcing plate to protect the thinner surface of the central rubber segment when the cable is not bent, so that the thinner surface of the central rubber segment will not be easily punctured or squeezed and damaged during normal use. At the same time, when the central rubber segment is bent, the movable reinforcing plate slides into the interior of the central reinforcing plate, so that the central reinforcing plate and the movable reinforcing plate will not affect the normal bending of the central rubber segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of the overall cutaway surface of the present invention;

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure of the functional ring, the limiting ring and the cable connection of the present invention;

[0029] Figure 4 It is a three-dimensional structural schematic diagram of the connection section of the engineering plastic segment, the functional ring and the gear block of the present invention;

[0030] Figure 5 It is a three-dimensional structural schematic diagram of the cross-section surface connecting the central rubber section and the central reinforcing plate of the present invention;

[0031] Figure 6 It is a three-dimensional structural schematic diagram of the cross-section surface of the functional box, the center rod and the coil spring connection of the present invention;

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the functional ring, the limiting ring and the gear block connected in the present invention.

[0033] In the figure: 1. Central rubber section; 2. Engineering plastic section; 3. Protective rubber section; 4. Functional ring; 5. Limiting ring; 6. Cable; 7. Central reinforcement plate; 8. Movable reinforcement plate; 9. Tooth block; 10. Fixed column; 11. Functional box; 12. Central rod; 13. Driving gear; 14. Coil spring; 15. Connecting chain. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-Figure 7 The present invention provides a technical solution: a bending-resistant flexible cable.

[0036] Embodiment 1: This embodiment discloses a central rubber segment 1, two ends of the central rubber segment 1 are fixedly connected to one end of a ring-shaped engineering plastic segment 2, and the other end of the engineering plastic segment 2 is fixedly connected to a protective rubber segment 3, and the protective rubber segment 3 is tubular in design, and cables 6 are arranged inside the central rubber segment 1, the engineering plastic segment 2 and the protective rubber segment 3, and a directional limiting mechanism is arranged on the inner surface of the engineering plastic segment 2, and the damage of the cable 6 when it is bent is reduced by controlling the winding direction and winding degree of the cable 6;

[0037] The directional limiting mechanism comprises: a functional ring 4, which is rotatably mounted on the inner surface of the engineering plastic segment 2, and a limiting ring 5 is fixedly arranged on the inner surface of the functional ring 4, an annular groove is provided on the outer surface of the functional ring 4 on one side facing the central rubber segment 1, and a tooth block 9 is fixedly arranged inside the annular groove on the side surface of the functional ring 4, a fixing column 10 is fixedly arranged in the middle of the outer surface of one side of the central rubber segment 1, a functional box 11 is fixedly arranged on the outer surface of the engineering plastic segment 2, and one end of a central rod 12 is rotatably connected inside the functional box 11, and the other end of the central rod 12 passes through the inner surface of the engineering plastic segment 2, and the end of the central rod 12 located on the inner side of the engineering plastic segment 2 is fixedly connected to a driving gear 13, a coil spring 14 is connected between the outer surface of the upper end of the central rod 12 and the inner surface of the functional box 11, one end of a connecting chain 15 is fixedly connected to the outer surface of the upper end of the central rod 12, and the other end of the connecting chain 15 passes through the outer surface of the functional box 11, and the end of the connecting chain 15 located outside the functional box 11 is fixedly connected to the fixing column 10;

[0038] The limiting ring 5 is evenly arranged on the inner surface of the functional ring 4, and the limiting ring 5 and the cable 6 are arranged in a one-to-one correspondence, and the cable 6 passes through the limiting ring 5;

[0039] The limiting rings 5 ​​passing through the two ends of the same cable 6 are concentrically arranged, and one end of the cable 6 located between the two functional rings 4 is spirally arranged;

[0040] The tooth blocks 9 are evenly arranged inside the annular groove of the function ring 4, and the function ring 4 is meshed and connected with the driving gear 13 through the tooth blocks 9;

[0041] The upper end of the center rod 12 is provided with a disc-shaped protrusion, and the connection between the center rod 12 and the connecting chain 15 is located between the two disc-shaped protrusions, and one end of the connecting chain 15 is wrapped around the outer surface of the center rod 12 between the two disc-shaped protrusions;

[0042] Under normal conditions, the cable 6 is spirally wound stably in the outer protective structure composed of the central rubber segment 1, the engineering plastic segment 2 and the protective rubber segment 3. The functional ring 4 limits the winding state of the cable 6 through the limiting rings 5 ​​evenly distributed on the inner side and corresponding to the cables 6 one by one, so that the cable 6 portion between the concentric limiting rings 5 ​​passing through the two ends of the same cable 6 maintains a precise spiral shape, preventing the spiral state from being destroyed during long-term use or slight shaking;

[0043] When the cable is bent, the central rubber segment 1 will be deformed due to the force, and the distance between its two ends will change. The distance between the fixed column 10 located in the middle of the outer surface of one end of the central rubber segment 1 and the engineering plastic segment 2 and the protective rubber segment 3 will change accordingly. The end of the connecting chain 15 wrapped around the surface of the central rod 12 drives the central rod 12 to rotate, and the driving gear 13 of the central rod 12 located at the inner end of the engineering plastic segment 2 rotates. Since the driving gear 13 is engaged with the tooth block 9 in the annular groove on the side surface of the functional ring 4, the functional ring 4 is driven to rotate actively. The rotation of the functional ring 4 changes the restriction state of the limit ring 5 on the cable 6, so that the cable 6 can be untwisted more smoothly to adapt to the change in length during the bending process, effectively avoiding the stretching and extrusion of the surface insulation layer of the cable 6 due to bending, and protecting the integrity of the insulation layer.

[0044] When the cable is no longer bent, due to the elastic restoring force of the coil spring 14 connected between the center rod 12 and the function box 11, the center rod 12 will rotate in the opposite direction. Because one end of the center rod 12 is fixedly connected to the driving gear 13, and the driving gear 13 is engaged with the tooth block 9 in the annular groove of the function ring 4, the function ring 4 will also rotate in the opposite direction. In this way, the limiting ring 5 on the inner side of the function ring 4 will guide the cable 6 to return to its original stable spiral winding state, ensuring that the cable 6 maintains a good layout without bending, and is prepared for the next possible bending.

[0045] Embodiment 2: Based on Embodiment 1, this embodiment discloses that an annular groove is formed on the inner surface of the central rubber segment 1, and a central reinforcing plate 7 is fixedly connected to the inner part of the annular groove of the central rubber segment 1;

[0046] The central reinforcing plate 7 is a circular ring with hollow ends, and one end of a movable reinforcing plate 8 is slidably connected inside the two ends of the central reinforcing plate 7, and a spring is connected between the movable reinforcing plate 8 and the central reinforcing plate 7;

[0047] The central reinforcing plate 7, the movable reinforcing plate 8 and the central rubber segment 1 are concentrically arranged, and one end of the movable reinforcing plate 8 away from the central reinforcing plate 7 is in contact with the inner surface of the groove inside the central rubber segment 1;

[0048] The annular groove design on the inner surface of the middle section of the central rubber segment 1 allows the cable to bend preferentially at the designated position when it is bent, ensuring the precise coordination between the bending position and the layout of the cable 6, preventing the cable 6 from accidentally bending at other positions and causing damage to the insulation skin, and when not bent, the central reinforcing plate 7 in the annular groove of the central rubber segment 1 and the movable reinforcing plates 8 slidably connected to the inside of its two ends work together, and the springs between the two provide supporting force to protect the thinner surface of the central rubber segment 1 to resist possible puncture or extrusion from the outside. Once the central rubber segment 1 begins to bend, the movable reinforcing plate 8 will overcome the spring elastic force under the action of the bending force and slide into the central reinforcing plate 7, without hindering the normal bending of the central rubber segment 1. While ensuring the bending flexibility of the cable, the protection efficiency of the key parts of the central rubber segment 1 is enhanced, thereby comprehensively improving the overall bending resistance and durability of the cable.

[0049] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and do not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A bending-resistant flexible cable, comprising a central rubber section (1), wherein both ends of the central rubber section (1) are fixedly connected to one end of a ring-shaped engineering plastic section (2), and the other end of the engineering plastic section (2) is fixedly connected to a protective rubber section (3), and the protective rubber section (3) is of tubular design, and cables (6) are arranged inside the central rubber section (1), the engineering plastic section (2) and the protective rubber section (3), characterized in that: The inner surface of the engineering plastic section (2) is provided with a directional limiting mechanism, which reduces damage to the cable (6) when it is bent by controlling the winding direction and degree of the cable (6); The directional limiting mechanism comprises: a functional ring (4), the functional ring (4) being rotatably mounted on the inner surface of the engineering plastic segment (2), and a limiting ring (5) being fixedly arranged on the inner surface of the functional ring (4), an annular groove being provided on the outer surface of the functional ring (4) on one side facing the central rubber segment (1), and a tooth block (9) being fixedly arranged inside the annular groove on the side surface of the functional ring (4), a fixing column (10) being fixedly arranged in the middle of the outer surface of one side of the central rubber segment (1), and a functional box (11) being fixedly arranged on the outer surface of the engineering plastic segment (2), and a central rod (11) being rotatably connected inside the function box (11). The center rod (12) is connected to one end of the center rod (12), and the other end of the center rod (12) penetrates the inner surface of the engineering plastic section (2), the end of the center rod (12) located on the inner side of the engineering plastic section (2) is fixedly connected to a driving gear (13), a coil spring (14) is connected between the outer surface of the upper end of the center rod (12) and the inner surface of the function box (11), the outer surface of the upper end of the center rod (12) is fixedly connected to one end of a connecting chain (15), the other end of the connecting chain (15) penetrates the outer surface of the function box (11), and the end of the connecting chain (15) located outside the function box (11) is fixedly connected to the fixing column (10).

2. The anti-bending flexible cable according to claim 1, characterized in that: The limiting rings (5) are evenly arranged on the inner surface of the functional ring (4), and the limiting rings (5) and the cables (6) are arranged in a one-to-one correspondence, and the cables (6) pass through the limiting rings (5).

3. The anti-bending flexible cable according to claim 1, characterized in that: The limiting rings (5) passing through the two ends of the same cable (6) are concentrically arranged, and one end of the cable (6) located between the two functional rings (4) is spirally arranged.

4. The anti-bending flexible cable according to claim 1, characterized in that: The tooth blocks (9) are evenly arranged inside the annular groove of the functional ring (4), and the functional ring (4) is meshedly connected with the driving gear (13) via the tooth blocks (9).

5. The anti-bending flexible cable according to claim 1, characterized in that: A disc-shaped protrusion is provided at the upper end of the central rod (12), and the connection between the central rod (12) and the connecting chain (15) is located between the two disc-shaped protrusions, and one end of the connecting chain (15) is wrapped around the outer surface of the central rod (12) between the two disc-shaped protrusions.

6. The anti-bending flexible cable according to claim 1, characterized in that: An annular groove is provided on the inner surface of the central rubber segment (1), and a central reinforcing plate (7) is fixedly connected to the interior of the annular groove of the central rubber segment (1).

7. The anti-bending flexible cable according to claim 6, characterized in that: The central reinforcing plate (7) is a circular ring with hollow ends, and one end of a movable reinforcing plate (8) is slidably connected inside the two ends of the central reinforcing plate (7), and a spring is connected between the movable reinforcing plate (8) and the central reinforcing plate (7).

8. The anti-bending flexible cable according to claim 7, characterized in that: The central reinforcing plate (7), the movable reinforcing plate (8) and the central rubber segment (1) are arranged concentrically, and one end of the movable reinforcing plate (8) away from the central reinforcing plate (7) is in contact with the inner surface of the groove inside the central rubber segment (1).

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