A connection structure of an aluminum sheathed cable and a cable accessory

Abstract

The application relates to the technical field of power cables, in particular to a connecting structure of an aluminum-sheathed cable and a cable accessory, which comprises a connecting base ring, a rotating disc and three groups of self-adapting claw walls, the claw walls are made of super-elastic titanium-nickel alloy frameworks, the inner sides of the claw walls are provided with piezoelectric ceramic sheets and magnetorheological liquid cavities, and the end portions of the claw walls are fixed with bionic flexible friction sheets. The claw walls are driven to move radially through a transmission assembly, the clamping force is adjusted in real time through a PID controller, the magnetorheological liquid dynamically adjusts the viscosity under the electromagnetic field to dissipate vibration energy, the piezoelectric ceramic sheets generate reverse vibration to offset interference. The claw walls are pre-deformed to be attached to the cable connection part, the contact pressure is uniformly distributed, and the bionic microstructure enhances the clamping stability through van der Waals force. The application solves the problems of poor adaptability and connection loosening caused by vibration in the prior art, and realizes reliable connection of the cable and the accessory.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, specifically a connection structure for an aluminum-sheathed cable and cable accessories. Background Technology

[0002] Aluminum-sheathed cables are cables used for power transmission. Their conductors are typically aluminum or copper, and they are encased in an aluminum sheath for mechanical protection and electromagnetic shielding. The structure and components of aluminum-sheathed cables include: Conductors: mostly multi-stranded aluminum (or copper) wires, providing good conductivity and flexibility.

[0003] Insulation layer: Made of cross-linked polyethylene (XLPE), ethylene propylene rubber (EPR) and other materials, it is resistant to heat aging.

[0004] Metal Sheath: The aluminum sheath, as a key component, serves the following functions:

[0005] Electromagnetic shielding: prevents electric field interference and reduces line loss.

[0006] Mechanical protection: pressure resistant, moisture resistant, and corrosion resistant.

[0007] Short-circuit current path: carries short-circuit current during a fault.

[0008] Outer protective layer: usually made of polyethylene (PE) or polyvinyl chloride (PVC), which enhances weather resistance and chemical corrosion resistance.

[0009] Among them, cable accessories connected to aluminum-sheathed cables are key components used to ensure electrical performance, mechanical protection, and environmental sealing at cable terminations or intermediate connections.

[0010] Existing connection structures for connecting aluminum-sheathed cables and cable accessories have poor adaptability (i.e., limited applicability) during use. Moreover, the cables or cable accessories will vibrate during operation, and the resulting movement will affect the connection stability at the connection point. Over time, this will lead to loosening and reduced sealing at the connection point.

[0011] Therefore, in view of the above-mentioned problems, this technical solution proposes a connection structure for aluminum-sheathed cables and cable accessories. Summary of the Invention

[0012] The purpose of this invention is to provide a connection structure for aluminum-sheathed cables and cable accessories to solve the problems mentioned in the background art.

[0013] To achieve the above objectives, the present invention provides the following technical solution:

[0014] A connection structure for an aluminum-sheathed cable and cable accessories includes a connection mechanism for adaptively tightening and clamping the cable and cable accessories. The connection mechanism includes a circular connection base ring and a rotating disk rotatably mounted on one side of the connection base ring. Three sets of claw walls are evenly spaced in a ring on the inner side of the connection mechanism. The claw walls are radially movable and provide an enveloping clamping connection to the cable and cable accessory connection ends located at the center of the connection base ring. A transmission component is connected to the side of the claw wall away from the center of the connection base ring, and the transmission component extends into a power cavity formed in the inner wall of the connection base ring. Two sets of end face gears I and II (end face gear II has a larger diameter than end face gear I) are radially spaced on the side of the rotating disk facing the connecting base ring. End face gear I is simultaneously engaged with three sets of transmission components. A driving component is engaged with the outer side of end face gear II, which is located at the top of the connecting base ring. Under the control of the driving component, end face gear II drives the rotating disk to rotate, and then synchronously drives end face gear I to engage with the three sets of transmission components. This controls the three sets of transmission components to drive the claw walls at their ends to move radially, clamping and positioning the connection of the cable and cable accessories.

[0015] The claw wall is designed with a U-shaped structure and has a shape memory alloy skeleton on the inside. After heat treatment, it has super elasticity with a strain recovery rate of >98%. It can withstand 8% stress without plastic deformation. When clamping the connection between the cable and the cable accessory, it is pre-deformed to fit the different connection end wrapping diameters, and the contact pressure is evenly distributed. At the same time, when the temperature changes, its thermal expansion coefficient matches the aluminum stranded part of the cable core, reducing thermal stress.

[0016] The two ends of the claw wall are set as claw tips, and flexible friction plates are set on the claw tips. At the same time, piezoelectric ceramic plates are set on the inner side of the claw wall at a distance from the claw tips, perpendicular to the claw wall surface along the polarization direction. The piezoelectric ceramic plates are used to detect the vibration frequency of the claw wall and output a reverse compensation signal. Multiple sets of micro MEMS pressure sensors are uniformly arranged on the flexible friction plates. The micro MEMS pressure sensors are used to detect the contact pressure of the claw tips in real time. The detected data is fed back to the PID controller to dynamically adjust the motor torque of the drive component.

[0017] Multiple magnetorheological fluid chambers are evenly spaced along the axial direction on the inner side of the claw wall. The inside of the magnetorheological fluid chambers is filled with magnetorheological fluid, and an electromagnetic coil is wound around the outside of the magnetorheological fluid chamber (only a partial winding area is shown in the figure). A miniature digital programmable DC power supply is connected to one side of the top of the electromagnetic coil. When the electromagnetic coil is energized by the miniature digital programmable DC power supply, a magnetic field of 0-0.5T is generated, thereby controlling the viscosity change of the magnetorheological fluid (dynamic change range: 1-1000Pa·s). By controlling the viscosity change through the electromagnetic coil, the vibration energy is actively dissipated.

[0018] The adaptive clamping and fixing process of the claw wall for cables and cable accessories connections:

[0019] Initial scanning phase: The drive unit, in conjunction with the transmission assembly, drives the claw wall to retract towards the center. When the claw tip contacts the connection point of the cable and cable accessories, the motor torque in the drive unit increases sharply, triggering overload protection. Record the position of the claw wall at this time and calculate the diameter D = 2R + Δ after the cable and cable accessories are wrapped and connected.

[0020] Where R: the effective clamping radius of the claw wall contact point (i.e., the theoretical contact radius when the claw arm has not retracted);

[0021] Δ: The amount of retraction compensation caused by the elastic deformation of the claw wall (calculated from the displacement difference when the motor in the drive unit is overloaded), that is: the difference between the actual displacement and the theoretical displacement of the claw wall caused by elastic deformation when the motor in the drive unit drives the claw wall to contact the connection of the cable and cable accessories.

[0022] Specifically, when the claw wall contacts the outer side of the connection of the cable or cable accessory, the position of the claw tip is the measurement reference plane of R, and finally D is the accurate value of the outer diameter of the connection of the cable or cable accessory (including the compensation amount Δ).

[0023] Deformation and bonding stage: The claw wall pre-deforms according to the D value (deformation δ=π(D-D0), where D0 is the initial inner diameter), so that the three sets of claw walls are tightly bonded to the surface of the connection of the cable and cable accessories in an enveloping shape, with a contact pressure F=3kδ (k is the claw arm stiffness coefficient, k=15N / mm);

[0024] Wherein, D0 is the original inner diameter of the connecting mechanism when it is not clamping the cable or cable accessories (i.e., the minimum inner diameter when the three claws are in a fully closed state).

[0025] Function: Serves as a reference value during the deformation bonding stage, and is used to calculate the deformation δ using the formula:

[0026] δ=π(D-D0) / 3.

[0027] Dynamic locking stage: The magnetorheological fluid is cured under a current of 500mA (the viscosity is increased by 1000 times compared to the cable), which forms a rigid constraint on the claw wall. At the same time, the piezoelectric ceramic sheet monitors the vibration spectrum and dynamically adjusts the reverse excitation frequency.

[0028] Compared with the prior art, the beneficial effects of the present invention are: this connection structure can enable adaptive rigid positioning connection between the cable and cable accessories;

[0029] Vibration detection is performed using piezoelectric ceramic sheets, generating micro-vibrations in opposite phases to cancel out vibrations. At the same time, a flexible friction sheet is set up, and the micron-level suction cup structure on the surface of the biomimetic friction sheet generates van der Waals forces under contact pressure, so that the clamping force increases with the increase of external force. Attached Figure Description

[0030] Figure 1This is a three-dimensional schematic diagram showing the distribution of cables, cable accessories, and connection mechanisms in a connection structure for an aluminum-sheathed cable and cable accessories.

[0031] Figure 2 This is a partial side view schematic diagram of the distribution of cables, cable accessories and connection mechanisms in a connection structure of an aluminum-sheathed cable and cable accessories.

[0032] Figure 3 This is a partial front view schematic diagram of the distribution of cables, cable accessories and connection mechanisms in a connection structure of an aluminum-sheathed cable and cable accessories.

[0033] Figure 4 This is a partial schematic diagram of the connection mechanism in a connection structure for an aluminum-sheathed cable and cable accessories. Figure I .

[0034] Figure 5 This is a partial schematic diagram of the connection mechanism in a connection structure for an aluminum-sheathed cable and cable accessories. Figure II .

[0035] Figure 6 This is a partial schematic diagram of the transmission component in a connection structure between an aluminum-sheathed cable and cable accessories.

[0036] Figure 7 for Figure 4 A magnified structural diagram of A in the diagram.

[0037] Figure 8 This is a schematic diagram of a magnetorheological fluid cavity in a connection structure between an aluminum-sheathed cable and cable accessories.

[0038] Figure 9 for Figure 7 A magnified structural diagram of B in the diagram.

[0039] Figure 10 for Figure 1 A magnified structural diagram of C.

[0040] The components include: cable 10, cable accessories 11, connecting mechanism 12, connecting base ring 13, claw wall 15, connecting block 16, positioning rod 17, positioning hole 18, adjusting screw 19, sleeve 20, spur gear 21, bearing 22, positioning key 23, connecting rod 24, rotating disk 26, end face gear I 27, rotating ring 28, rotating groove 29, power chamber 30, magnetorheological fluid chamber 31, piezoelectric ceramic sheet 32, silver paste 33, claw tip 34, flexible friction plate 35, micro MEMS pressure sensor 36, magnetorheological fluid 37, electromagnetic coil 38, micro digital programmable DC power supply 39, micro main motor 41, drive gear 42, and end face gear II. Detailed Implementation

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] Please see Figures 1-10A connection structure for an aluminum-sheathed cable and cable accessories includes a connection mechanism 12 for adaptive clamping and connecting the cable 10 and the cable accessory 11. The connection mechanism 12 includes a circular connection base ring 13 and a rotating disk 26 rotatably mounted on one side of the connection base ring 13. Three sets of claw walls 15 are evenly spaced in a ring on the inner side of the connection mechanism 12. The claw walls 15 are radially movable and perform an enveloping clamping connection on the connection ends of the cable 10 and the cable accessory 11 located at the center of the connection base ring 13. A transmission component is connected to the side of the claw wall 15 away from the center of the connection base ring 13. The transmission component extends to a power cavity 3 opened in the inner wall of the connection base ring 13. Within 0, two sets of end face gears I 27 and 43 II (the diameter of end face gear 43 II is larger than that of end face gear I 27) are radially spaced on the side of the rotating disk 26 facing the connecting base ring 13. End face gear I 27 is simultaneously engaged with three sets of transmission components. A driving component is engaged with the outer side of end face gear 43 II, which is located at the top of the connecting base ring 13. Under the control of the driving component, end face gear 43 II drives the rotating disk 26 to rotate, and then synchronously drives end face gear I 27 to engage with the three sets of transmission components. This controls the three sets of transmission components to drive the claw wall 15 at its end to move radially, clamping and positioning the connection of cable 10 and cable accessory 11.

[0046] The claw wall 15 is designed with a U-shaped structure and has a shape memory alloy skeleton on the inner side. After heat treatment, it has super elasticity and a strain recovery rate of >98%. It can withstand 8% stress without plastic deformation. When clamping the connection between the cable 10 and the cable accessory 11, it is pre-deformed to fit different connection end wrapping diameters, and the contact pressure is evenly distributed. At the same time, when the temperature changes, its thermal expansion coefficient matches the aluminum stranded part of the cable core, reducing thermal stress.

[0047] The claw wall 15 has claw tips 34 at both ends, and flexible friction plates 35 are provided on the claw tips 34. At the same time, piezoelectric ceramic plates 32 are provided on the inner side of the claw wall 15 at a distance from the claw tips 34, perpendicular to the surface of the claw wall 15 along the polarization direction. The piezoelectric ceramic plates 32 are used to detect the vibration frequency of the claw wall 15 and output a reverse compensation signal. Multiple sets of micro MEMS pressure sensors 36 are uniformly arranged on the flexible friction plates 35. The micro MEMS pressure sensors 36 are used to detect the contact pressure of the claw tips 34 in real time. The detected data is fed back to the PID controller to dynamically adjust the motor torque of the drive component.

[0048] Multiple magnetorheological fluid chambers 31 are evenly spaced along the axial direction on the inner side of the claw wall 15. The magnetorheological fluid chambers 31 are filled with magnetorheological fluid 37. An electromagnetic coil 38 is wound around the outside of the magnetorheological fluid chambers 31 (only a partial winding area is shown in the figure). A miniature digital programmable DC power supply 39 is connected to one side of the top of the electromagnetic coil 38. When the electromagnetic coil 38 is energized by the miniature digital programmable DC power supply 39, a magnetic field of 0-0.5T is generated, thereby controlling the viscosity change of the magnetorheological fluid 37 (dynamic change range: 1-1000Pa·s). By controlling the viscosity change through the electromagnetic coil 38, the vibration energy is actively dissipated.

[0049] Adaptive clamping and fixing process at the connection between the claw wall 15 and the cable 10 and cable accessory 11:

[0050] Initial scanning phase: The drive unit cooperates with the transmission assembly to drive the claw wall 15 to retract towards the center. When the claw tip 34 contacts the connection of the cable 10 and the cable accessory 11, the motor torque in the drive unit increases sharply, triggering overload protection. Record the position of the claw wall 15 at this time and calculate the diameter D after the cable 10 and the cable accessory 11 are wrapped and connected: D = 2R + Δ.

[0051] Where R: the effective clamping radius of the contact point of the claw wall 15 (i.e. the theoretical contact radius when the claw arm has not retracted);

[0052] Δ: The amount of retraction compensation caused by the elastic deformation of the claw wall 15 (calculated from the displacement difference when the motor in the drive unit is overloaded), that is: the difference between the actual displacement and the theoretical displacement of the claw wall 15 caused by elastic deformation when the motor in the drive unit drives the claw wall 15 to contact the connection of the cable 10 and the cable accessory 11.

[0053] Specifically, when the claw wall 15 contacts the outer side of the connection between the cable 10 and the cable accessory 11, the position of the claw tip 34 is the measurement reference plane of R, and finally D is the accurate value of the outer diameter of the connection between the cable 10 and the cable accessory 11 (including the compensation amount Δ).

[0054] Deformation and bonding stage: The claw wall 15 pre-deforms according to the D value (deformation δ=π(D-D0),D0 is the initial inner diameter), so that the three sets of claw walls 15 tightly bond to the connection surface of the cable 10 and cable accessory 11 in an enveloping shape, and the contact pressure F=3kδ (k is the claw arm stiffness coefficient, k=15N / mm).

[0055] Wherein, D0 is the original inner diameter of the connecting mechanism 12 when it is not clamping the connection between the cable 10 and the cable accessory 11 (i.e., the minimum inner diameter when the three claws are in a fully closed state).

[0056] Function: Serves as a reference value during the deformation bonding stage, and is used to calculate the deformation δ using the formula:

[0057] δ=π(D-D0) / 3.

[0058] Dynamic locking stage: The magnetorheological fluid 37 is cured under a current of 500mA (the viscosity is increased by 1000 times), which makes the claw wall 15 form a rigid constraint. At the same time, the piezoelectric ceramic sheet 32 ​​monitors the vibration spectrum and dynamically adjusts the reverse excitation frequency.

[0059] Through the above-mentioned automated operation, the cable 10 and the cable accessory 11 can be adaptively rigidly positioned and connected under the control of three sets of claw walls 15. At the same time, the piezoelectric ceramic sheet 32 ​​is used for vibration detection to generate reverse phase micro-vibrations for vibration cancellation. Meanwhile, a flexible friction sheet 35 is set up. The micron-level suction cup structure (inspired by tree frog foot pads) on the surface of the biomimetic friction sheet generates van der Waals force under contact pressure, so that the clamping force increases with the increase of external force.

[0060] In this embodiment of the invention, the connecting base ring 13 is made of aerospace aluminum alloy with anodized surface treatment. The shape memory alloy skeleton is made of titanium-nickel alloy (NiTi, phase change temperature of the dynamic cavity 30°C). The flexible friction plate 35 is bonded to the claw tip 34 with epoxy resin, and the edge is mechanically fixed with stainless steel buckles to prevent detachment.

[0061] It should be noted that Δ is: the motor drives the claw wall 15 to move towards the center. When the claw tip contacts the connection of the cable 10 and the cable accessory 11, the motor triggers overload protection due to the sudden increase in load torque. At this time, the claw wall 15 retracts slightly due to the superelasticity of the shape memory alloy skeleton. The amount of retraction Δ is recorded by the encoder.

[0062] The flexible friction pad 35 adopts a composite structure, including:

[0063] Base layer: 0.5mm thick 316L stainless steel sheet, laser-cut with honeycomb-shaped weight-reducing holes (hole diameter 2mm, spacing 3mm);

[0064] Surface layer: 3mm thick silicone rubber embedded with silicon carbide particles (50μm in diameter), and the surface is laser-engraved with biomimetic microstructures after molding;

[0065] Structure: Hexagonal array, recess depth sleeve 20μm;

[0066] The piezoelectric ceramic sheet 32 ​​is electrically connected to the claw wall 15 via silver paste 33, and its model is generally PZT-5H.

[0067] In one embodiment of the present invention, the driving component includes an end face gear 41Ⅱ fixed to the top of the connecting base ring 13. The top output end of the end face gear 41Ⅱ is connected to a driving tooth 42. One side of the driving tooth 42 is meshed with a micro main motor 43. At the same time, a rotating ring 28 is installed on the side wall of the rotating disk 26 located on the same side as the end face gear Ⅰ 27. A rotating groove 29 is opened on the side wall of the connecting base ring 13 corresponding to the rotating ring 28. The rotating ring 28 is placed in the rotating groove 29 and slides in a limited manner, thereby maintaining a stable rotational connection between the rotating disk 26 and the connecting base ring 13. The diameter of the rotating ring 28 is smaller than that of the end face gear Ⅰ 27. At the same time, the cross-section of the rotating ring 28 and the rotating groove 29 is set as a T-shaped structure to maintain the two anti-disengagement sliding.

[0068] Meanwhile, for the end face gear 41Ⅱ, its model is: Maxon EC connecting block 16-40W, rated torque cable 10mNm, built-in encoder (resolution cable 1000CPR).

[0069] It should be noted that, for the connection between cable 10 and cable accessory 11, depending on the type of cable accessory 11, the end of cable accessory 11 can be wrapped around the outside of cable 10, or the end of cable 10 can be wrapped around the outside of cable accessory 11. This connection structure is applicable to both of the above connection forms.

[0070] As a preferred embodiment of the present invention, see [reference]. Figure 6 The transmission assembly includes a spur gear 21 mounted inside the silver paste 33 via a bearing 22. One side of the spur gear 21 meshes with the end face gear I 27. A sleeve 20 is connected to the other end of the spur gear 21 radially relative to the bearing 22. A set of adjusting screws 19 is fitted onto the sleeve 20. An internal threaded hole is formed in the inner wall of the connecting base ring 13 corresponding to the adjusting screw 19. The adjusting screws 19 are distributed along the internal threaded hole. Simultaneously, the top of the adjusting screw 19 extends to the outside of the power chamber 30 and rotates to connect with a rod 24. The top of the connecting rod 24 is fixedly connected to the bottom center of the claw wall 15 via a connecting block 16. The sleeve 2... A positioning key 23 is installed on the outer wall of the 0 circumference. A positioning slide rail is opened in the inner wall of the adjusting screw 19 corresponding to the positioning key 23. The positioning key 23 slides along the positioning slide rail, that is, the end face gear 41Ⅱ drives the drive gear 42 to rotate, thereby driving the micro main motor 43 to control the rotating disk 26 to rotate along one side of the connecting base ring 13. Then, the end face gear Ⅰ 27 simultaneously meshes with multiple sets of spur gears 21, thereby driving the spur gears 21 to rotate, and then controlling the sleeve 20 to rotate. Then, the radial movement is achieved by using the threaded connection between the adjusting screw 19 and the inner thread hole, thereby adjusting the radial position of the claw wall 15.

[0071] To maintain the position of the bottom of the claw wall 15 relative to the connecting rod 24, L-shaped positioning rods 17 are symmetrically connected on both sides of the connecting block 16. The bottom end of the positioning rod 17 is provided with a positioning hole 18 on the connecting base ring 13. The positioning rod 17 moves radially along the inside of the positioning hole 18 to maintain the relative stability of the claw wall 15 and make it move only in the radial direction.

[0072] It should be noted that the meshing transmission between the drive gear 42 and the micro main motor 43 is similar to the transmission between the end face gear I27 and the spur gear 21. For the meshing transmission between the end face gear I27 and the four sets of spur gears 21, the tooth profile of the end face gear I27 is designed according to the orthogonal meshing condition, forming a 90° axial angle with the three spur gears 21. The axis of the spur gears 21 is parallel to the end face of the face gear and is evenly distributed radially at 120°. During the design, the module m can be adjusted to adapt to small and medium torque scenarios.

[0073] Regarding some of the key parameters:

[0074] Pressure angle α = 20° (ISO standard reduces the risk of interference);

[0075] Tooth width b = 3m (to ensure contact strength);

[0076] Face gear material: Powder metallurgy steel (such as FL-5305, density ≥7.2g / cm³ after sintering) 3 ).

[0077] As a preferred embodiment of the present invention, the miniature digital programmable DC power supply 39 model is set as Keysight N6705C, and some of its key parameters are as follows: output range: 0-20V / 0-5A (satisfying the current requirement I=V / R=5A when the coil resistance R≈4Ω);

[0078] Settling time: <100μs (matching piezoelectric response time 0.8ms);

[0079] Ripple noise: <1mV rms (to ensure magnetic field stability);

[0080] Remote control interface: LAN / USB / GPIB (for communication with the main control system). The specific operation and principles will not be elaborated here; please refer to existing technologies for details.

[0081] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A connection structure for an aluminum-sheathed cable and cable accessories, characterized in that, The cable (10), cable accessories (11), and connecting mechanism (12) are included, characterized in that the connecting mechanism (12) includes: The ring-shaped connecting base ring (13) and the rotating disk (26) are rotatably mounted on one side of the connecting base ring (13); the connecting mechanism (12) has three sets of claw walls (15) arranged at equal intervals in a ring on the inner side, and the claw walls (15) are arranged radially to perform an enveloping clamping connection between the cable (10) and the cable accessory (11) located at the center of the connecting base ring (13); Three sets of radially distributed U-shaped claw walls (15) with a memory alloy skeleton on the inner side. After heat treatment, the strain recovery rate is >98%, and it can withstand 8% stress without plastic deformation. The transmission assembly connects the claw wall (15) to the spur gear (21) in the power cavity (30) inside the annular connecting base ring (13), and the spur gear (21) meshes with the end face gear I (27) provided on the rotating disk (26); A piezoelectric ceramic sheet (32) is disposed on the inner side of the claw wall (15) for detecting vibration and outputting a reverse compensation signal; The flexible friction pad (35) is fixed to the claw tip (34) at the end of the claw wall (15), and the surface is provided with a biomimetic micron-level suction cup structure; A magnetorheological fluid chamber (31) is located inside the claw wall (15), filled with magnetorheological fluid (37) and an electromagnetic coil (38) wound around it. The magnetic field strength is adjusted by a micro digital programmable DC power supply (39) to control the viscosity.

2. The connection structure of an aluminum-sheathed cable and cable accessories according to claim 1, characterized in that, The shape memory alloy skeleton is set as a titanium-nickel alloy; the flexible friction sheet (35) includes a stainless steel base layer and a silicone rubber surface layer embedded with silicon carbide particles, and the surface is laser-engraved with a hexagonal array microstructure with a recess depth of 20μm.

3. The connection structure according to claim 1, characterized in that, The transmission assembly includes: The sleeve (20) and the adjusting screw (19) are connected to the connecting base ring (13) through the internal thread; The positioning key (23) and positioning slide rail restrict the circumferential rotation of the sleeve (20); Connecting rod (24) and positioning rod (17), connecting claw wall (15) and ensuring radial movement stability.

4. The connection structure of an aluminum-sheathed cable and cable accessories according to claim 1, characterized in that, The rotating disk (26) is radially spaced on the side facing the connecting base ring (13) with two sets of end face gears I (27) and end face gears (43) II. The end face gears I (27) are simultaneously meshed with three sets of transmission components. The end face gears (43) II, located on the top of the connecting base ring (13), are meshed with a driving component on the outside. The driving component includes a micro main motor (41), the top output end of the micro main motor (41) is connected to a driving tooth (42), one side of the driving tooth (42) is meshed with the end face gear (43) II, and a rotating ring (28) is installed on the side wall of the rotating disk (26) located on the same side as the end face gear I (27). A rotating groove (29) is opened on the side wall of the connecting base ring (13) corresponding to the rotating ring (28), and the rotating ring (28) is placed in the rotating groove (29) for limited sliding.

5. The connection structure of an aluminum-sheathed cable and cable accessories according to claim 1, characterized in that, The magnetorheological fluid (37) has a viscosity dynamic range of 1-1000 Pa·s, and the electromagnetic coil (38) generates a magnetic field of 0-0.5T when a current of 0-5A is passed through it.

6. The connection structure of an aluminum-sheathed cable and cable accessories according to claim 1, characterized in that, The inner side of the claw wall (15) is provided with a micro MEMS pressure sensor (36) to detect the contact pressure in real time and feed it back to the PID controller to dynamically adjust the torque of the drive component.

7. The connection structure of an aluminum-sheathed cable and cable accessories according to claim 1, characterized in that, The surface of the connecting base ring (13) is anodized, and the rotating disk (26) is limited and slidably connected to the rotating groove (29) through the rotating ring (28) with a T-shaped cross section.

8. The connection structure of an aluminum-sheathed cable and cable accessories according to claim 3, characterized in that, The meshing pressure angle between the end face gear I (27) and the spur gear (21) is 20°, the tooth width is 3 times the module, and the material is powder metallurgy steel FL-5305.

9. The connection structure of an aluminum-sheathed cable and cable accessories according to claim 1, characterized in that, The piezoelectric ceramic sheet (32) is electrically connected to the claw wall (15) through silver paste (33), and its polarization direction is perpendicular to the surface of the claw wall. The model is PZT-5H.

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