Steel wire flexible shaft winding device and automobile flexible shaft

Abstract

The invention relates to the technical field of flexible shaft manufacturing, and discloses a steel wire flexible shaft winding device and an automobile flexible shaft, the steel wire flexible shaft winding device comprises a rack, the rack is provided with a pay-off rack, a plurality of twisting discs, a take-up rack, motors and a control unit, the multiple twisting discs and the multiple motors are arranged in a one-to-one correspondence mode, the motors drive the corresponding twisting discs to rotate, and the control unit controls the pay-off rack, the multiple twisting discs, the take-up rack, the motors and the control unit to rotate. A wire core is wound on the pay-off rack, to-be-stranded wires are wound on the stranding discs, the rack is provided with a plurality of photoelectric sensors in one-to-one correspondence with the stranding discs, the photoelectric sensors are arranged on one sides of the stranding discs, and a plurality of reflectors are annularly arranged on the sides, close to the photoelectric sensors, of the stranding discs. According to the steel wire flexible shaft winding device, real-time detection of the rotating speed of each stranding disc is achieved through the photoelectric sensor and the reflectors, the rotating speed of each motor can be accurately regulated and controlled through the control unit, it is ensured that the speed proportion between each stranding disc and the take-up frame is constant, and therefore the uniformity of the stranding pitch is ensured, and the winding efficiency is improved. And the quality stability of the finished flexible shaft is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of flexible shaft manufacturing technology, and more specifically, to a steel wire flexible shaft winding device and an automotive flexible shaft. Background Technology

[0002] In steel wire flexible shaft winding equipment, multiple strands of wire are typically stranded synchronously using multiple stranding reels to produce flexible shaft core wires with good flexibility and torque transmission performance. Existing winding equipment generally includes a pay-off frame, stranding reels, a take-up frame, and a drive motor. The pay-off frame winds the wire core, and each stranding reel winds the strands to be stranded. During operation, the wire core led out from the pay-off frame passes through multiple stranding reels in sequence. Each stranding reel rotates under the drive of the motor, winding the strands to be stranded onto the wire core. Finally, the take-up frame takes up the finished flexible shaft.

[0003] In such equipment, to ensure uniform take-up and neat winding, it is necessary to maintain a constant speed ratio between each stranding reel and the take-up frame to achieve a stable stranding pitch. However, traditional equipment mainly relies on the precision of the mechanical transmission system, using gears or chains to ensure speed matching of various moving parts. This mechanical transmission method has inherent defects: long-term operation leads to gear wear, resulting in decreased transmission accuracy, and it is impossible to independently monitor and adjust the actual speed of each stranding reel. When a stranding reel experiences speed fluctuations due to load changes or transmission failures, operators often cannot detect it in time. Problems are often only discovered after uneven winding or abnormal stranding pitch occurs, leading to unstable product quality. Summary of the Invention

[0004] To address at least one of the aforementioned problems, the present invention provides a steel wire flexible shaft winding device, comprising a frame, a wire feeding frame, a stranding reel, a take-up frame, a motor, and a control unit. Multiple stranding reels and a motor are provided, each corresponding to a specific reel. The motor drives the corresponding stranding reel to rotate. The wire feeding frame winds a wire core, and the stranding reel winds a strand to be twisted. The frame is equipped with multiple photoelectric sensors corresponding to each stranding reel. The photoelectric sensors are positioned on one side of each stranding reel, and multiple reflectors are arranged in a ring on the side of the stranding reel closest to the photoelectric sensor. The motor and the photoelectric sensors are electrically connected to the control unit. The photoelectric sensors detect the rotational speed signal of the corresponding stranding reel and transmit the rotational speed signal to the control unit. During operation, the wire core led out from the wire feeding frame passes sequentially through multiple stranding reels. The rotation of the stranding reels winds the strands to be twisted onto the wire core to form a finished flexible shaft, which is then taken up by the take-up frame.

[0005] Optionally, the plurality of reflectors are arranged in opposite directions at non-equidistant intervals along the circumference of the twisting disc, and the reflectors are embedded in the twisting disc.

[0006] Optionally, the control unit includes: a signal acquisition module, electrically connected to each of the photoelectric sensors, for high-frequency sampling of the rotational speed signal and recording the arrival timestamp of each pulse; a data processing module, electrically connected to the signal acquisition module, for calculating the instantaneous rotational speed fluctuation curve of each of the winding discs based on the timestamp, and for performing signal decomposition on the instantaneous rotational speed fluctuation curve to extract features reflecting the mechanical vibration state of the winding discs, the features including time-domain features and frequency-domain features; and a state discrimination module, electrically connected to the data processing module, which internally has a normal operating condition feature database, for comparing the extracted features with the database, and outputting an abnormal discrimination signal when the features exceed a preset threshold range.

[0007] Optionally, the state discrimination module is also used to perform a horizontal comparison of the features of multiple stranding discs. When the difference between the feature of one stranding disc and the features of other stranding discs exceeds a preset coordination threshold, a discrimination signal indicating that the strand corresponding to the stranding disc is abnormal is output. The sampling frequency of the signal acquisition module is 100kHz-1MHz.

[0008] Optionally, it also includes an electrical control box, in which the signal acquisition module, the data processing module and the status discrimination module are all located. The electrical control box is also equipped with an alarm module electrically connected to the control unit. The electrical control box is equipped with a display screen. The alarm module is used to receive the abnormal discrimination signal and issue an audible and visual alarm. The alarm module is also used to identify the twisting disc corresponding to the abnormal discrimination signal on the display screen.

[0009] Optionally, the control unit is further configured to adjust the rotational speed of each motor in real time based on the rotational speed signal detected by each of the photoelectric sensors, so as to control the twisting pitch of each of the twisting discs to be constant.

[0010] Optionally, the frame is provided with multiple manual switch boxes, each of which corresponds to a motor and is used to manually start and stop the corresponding motor.

[0011] Optionally, the frame is provided with a pre-bending turntable for pre-bending the strands drawn out from the stranding reel. During operation, the strands drawn out from the stranding reel near the take-up frame are wound around the pre-bending turntable for pre-bending, and then drawn out to the take-up frame for take-up. The frame is provided with a protective plate, which is placed on the upper side of the pre-bending turntable. A bracket connects the protective plate to the frame. The protective plate is made of transparent acrylic or explosion-proof glass.

[0012] Optionally, the frame is provided with a metal protective cover, which covers the upper side of the winch disc. One end of the metal protective cover is hinged to the frame, and the other end of the metal protective cover is provided with a handle.

[0013] Compared to existing technologies, the steel wire flexible shaft winding device of this invention achieves real-time detection of the rotational speed of each stranding disc by installing photoelectric sensors on the frame corresponding to multiple stranding discs and arranging multiple reflectors in a ring on one side of the stranding discs. The photoelectric sensors transmit the collected rotational speed signals to the control unit, which can then precisely adjust the speed of each motor to ensure a constant speed ratio between each stranding disc and the take-up frame, thereby guaranteeing the uniformity of the stranding pitch. This device solves the problems of insufficient precision in mechanical transmission and inability to monitor the operating status in real time in traditional equipment, effectively improving the quality stability of the finished flexible shaft.

[0014] In addition, the present invention also provides an automotive flexible shaft, which is manufactured by the above-mentioned steel wire flexible shaft winding device. Attached Figure Description

[0015] Figure 1 This is a perspective view of the steel wire flexible shaft winding device of the present invention;

[0016] Figure 2 This is a schematic diagram of the pre-bending turntable part of the steel wire flexible shaft winding device of the present invention;

[0017] Figure 3 This is a schematic diagram of the winding disc portion of the steel wire flexible shaft winding device of the present invention;

[0018] Figure 4 for Figure 3 Enlarged view of section A in the middle;

[0019] Figure 5 This is a schematic diagram of the structure of the metal protective cover of the steel wire flexible shaft winding device of the present invention;

[0020] Figure 6 This is a schematic diagram of the electrical control box of the steel wire flexible shaft winding device of the present invention;

[0021] Figure 7 This is a schematic diagram of the photoelectric sensor part of the steel wire flexible shaft winding device of the present invention;

[0022] The component names corresponding to the various labels in the figure are as follows: 1 is the frame, 11 is the photoelectric sensor, 2 is the wire feeding frame, 21 is the wire core, 3 is the stranding reel, 31 is the strand to be stranded, 32 is the reflector, 4 is the take-up frame, 5 is the metal protective cover, 51 is the handle, 6 is the electrical control box, 61 is the display screen, 7 is the manual switch box, 8 is the pre-bending turntable, 9 is the protective plate, 91 is the bracket, and 10 is the mounting bracket. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] In the description of this invention, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship when the product is in normal use.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0026] See Figures 1-4 This invention provides a steel wire flexible shaft winding device, including a frame 1. The frame 1 is equipped with a wire feeding frame 2, a stranding disc 3, a take-up disc 4, a motor, and a control unit. Multiple stranding discs 3 and motors are provided, and they correspond one-to-one. The motor drives the corresponding stranding disc 3 to rotate. The wire feeding frame 2 is wound with a wire core 21, and the stranding disc 3 is wound with a strand 31 to be stranded. The frame 1 is equipped with multiple photoelectric sensors 11 that correspond one-to-one with the stranding disc 3. The photoelectric sensors 11 are placed on one side of the stranding disc 3. Multiple reflectors 32 are arranged in a ring on the side of the stranding disc 3 near the photoelectric sensor 11. The motor and photoelectric sensors 11 are electrically connected to the control unit. The photoelectric sensors 11 are used to detect the rotation speed signal of the corresponding stranding disc 3 and transmit the rotation speed signal to the control unit. During operation, the wire core 21 led out from the wire feeding frame 2 passes through multiple stranding discs 3 in sequence. The rotation of the stranding disc 3 winds the strands 31 to be stranded onto the wire core 21 to form a finished flexible shaft. The take-up disc 4 then takes up the finished flexible shaft.

[0027] Specifically, when a hidden fault such as burrs or broken wires occurs in the strands, causing load changes, the rotation speed of the stranding reel 3 will be abnormal (compared to when there are no hidden faults such as burrs or broken wires). The photoelectric sensor 11 captures this rotation speed signal in time and transmits it to the control unit. The control unit automatically adjusts the rotation speed of the corresponding motor 5 accordingly to maintain a constant stranding pitch, avoiding uneven wire laying caused by faults. At the same time, this rotation speed fluctuation signal itself provides a data basis for fault diagnosis, and can be used for fault early warning after further analysis and processing. This device can automatically compensate for rotation speed deviations without manual intervention, solving the problem of traditional equipment relying on manual experience and being unable to perceive the operating status in real time, effectively improving the quality stability of the finished flexible shaft. The take-up frame 4 and the pay-off frame 2 can be driven by another drive motor to rotate, which is existing technology and will not be described in detail here. In this embodiment, there are 3 stranding reels 3, and in another embodiment, there can also be 2 or 4.

[0028] This invention provides a wire flexible shaft winding device. By installing photoelectric sensors 11 on the frame 1, each corresponding to a plurality of winding discs 3, and arranging multiple reflectors 32 in a ring on one side of each winding disc 3, real-time detection of the rotational speed of each winding disc 3 is achieved. The photoelectric sensors 11 transmit the collected rotational speed signals to the control unit, which can then precisely adjust the speed of each motor 5 to ensure a constant speed ratio between each winding disc 3 and the take-up frame 4, thereby guaranteeing the uniformity of the winding pitch. This device solves the problems of insufficient precision in mechanical transmission and inability to monitor the operating status in real time in traditional equipment, effectively improving the quality stability of the finished flexible shaft.

[0029] See Figures 2-4 Multiple reflectors 32 are arranged at non-equidistant intervals in opposite directions along the circumference of the twisting disc 3. These reflectors 32 are embedded in the twisting disc 3. This non-equidistant arrangement of the reflectors 3 along the circumference of the twisting disc 3 gives the pulse signal received by the photoelectric sensor 11 a unique phase encoding characteristic. Based on this, the control unit can directly identify the absolute angular position of the twisting disc 3 at the moment of equipment startup without zeroing calibration. Simultaneously, the embedded installation of the reflectors 32, with their surfaces flush with or slightly lower than the end face of the twisting disc 3, effectively avoids oil adhesion and detachment caused by centrifugal force, ensuring the stability and reliability of signal acquisition under high-speed rotation and harsh operating conditions, further improving the accuracy of speed detection.

[0030] See Figures 1-3 The control unit includes: a signal acquisition module, electrically connected to each photoelectric sensor 11, used for high-frequency sampling of the rotational speed signal and recording the arrival timestamp of each pulse; a data processing module, electrically connected to the signal acquisition module, used for calculating the instantaneous speed fluctuation curve of each winch 3 based on the timestamp, and performing signal decomposition on the instantaneous speed fluctuation curve to extract features reflecting the mechanical vibration state of the winch 3, including time-domain and frequency-domain features; and a state discrimination module, electrically connected to the data processing module, which has an internal normal operating condition feature database, used to compare the extracted features with the database, and output an abnormal discrimination signal when the features exceed a preset threshold range. By setting up the signal acquisition module, data processing module, and state discrimination module, a complete intelligent monitoring link is constructed. The signal acquisition module performs high-frequency sampling of the rotational speed signal of each photoelectric sensor 11 and records the timestamp, and the data processing module calculates the instantaneous speed fluctuation curve of each winch 3 accordingly, extracting time-domain and frequency-domain features reflecting the mechanical vibration state. The status discrimination module compares the extracted features with an internally preset database of normal operating condition features. When any feature (either time-domain or frequency-domain feature) exceeds a threshold, an anomaly discrimination signal is output. This design upgrades ordinary speed monitoring to intelligent equipment status diagnosis, enabling real-time identification of latent faults such as wire burrs and broken wires.

[0031] Specifically, the principle by which this invention can sense the mechanical vibration state of the stranding disc 3 through the photoelectric sensor 11 is as follows: When the stranding disc 3 experiences mechanical vibration due to faults such as burrs or broken strands, the vibration causes instantaneous micro-fluctuations in the rotational speed of the stranding disc 3, resulting in a slight change in the time interval between the reflector 32 and the photoelectric sensor 11. The signal acquisition module records the precise arrival timestamps of each pulse at a high frequency of 100kHz-1MHz. Based on this, the data processing module calculates the instantaneous rotational speed fluctuation curve, which essentially carries the information of mechanical vibration. By performing signal decomposition and feature extraction on this curve, the time-domain and frequency-domain characteristics reflecting the vibration state can be obtained. Thus, the photoelectric speed sensor can sense mechanical vibration, improving intelligence, simplifying the structure, and reducing costs.

[0032] Furthermore, in this invention, time-domain features refer to statistical quantities directly extracted from the waveform of the instantaneous speed fluctuation curve as it changes over time, including kurtosis reflecting the sharpness of the waveform, peak factor reflecting the impact intensity, and impulse factor. Frequency-domain features refer to the spectral features extracted after transforming the instantaneous speed fluctuation curve to the frequency domain through Fourier transform, including the energy distribution of a specific frequency band and the amplitude of the characteristic frequency. Various implementation methods, such as using time-domain analysis alone, frequency-domain analysis alone, or a combination of both, are used to comprehensively capture speed fluctuation signals of different natures caused by faults such as burrs and broken wires in the strands. This ensures that the state discrimination module can flexibly select the most sensitive feature parameters for comparison according to actual working conditions, thereby improving the accuracy and reliability of fault identification. Preferably, in this embodiment, the accuracy and reliability of fault identification are further improved by combining time-domain analysis and frequency-domain analysis.

[0033] See Figure 1 The status discrimination module is also used to perform a lateral comparison of the features of multiple stranding discs 3. When the difference between the feature of one stranding disc 3 and the features of other stranding discs exceeds a preset coordination threshold, a discrimination signal indicating that the strand corresponding to the stranding disc 3 is abnormal is output. The signal acquisition module has a sampling frequency of 100kHz-1MHz. The status discrimination module performs a lateral comparison of the features of multiple stranding discs 3. When the difference between the feature of one stranding disc 3 and the features of other stranding discs exceeds a preset coordination threshold, the abnormality of the strand corresponding to that disc can be accurately located. Utilizing the principle that the features of each disc should be basically consistent under normal operating conditions, environmental interference is eliminated through relative comparison, improving the accuracy of fault identification. Simultaneously, the signal acquisition module uses high-frequency sampling of 100kHz-1MHz, which can capture microsecond-level instantaneous fluctuations in rotational speed, providing a fine data foundation for feature extraction, ensuring the reliability of lateral comparison, and achieving early warning and precise location of latent faults such as burrs and broken wires.

[0034] Furthermore, the photoelectric sensor 11 used in this invention is a diffuse reflection photoelectric sensor. Its working principle is as follows: the sensor integrates a transmitter and a receiver. The transmitter continuously emits a light beam towards the end face of the twisting disc 3. When the twisting disc 3 rotates, multiple reflectors 32 arranged in a ring on the end face periodically pass through the area illuminated by the light beam. The reflectors 32 reflect the light beam back to the receiver, and the sensor generates a pulse signal corresponding to the rotational speed accordingly. The non-reflective area absorbs or scatters the light beam and does not generate a reflected signal. This design generates a pulse sequence by detecting the presence or absence of reflected light, eliminating the need to install transmitters and receivers on both sides of the twisting disc 3. It has a simple structure, is easy to install, and can work stably in oily and dusty environments, ensuring the reliability of rotational speed detection. Preferably, in this embodiment, the signal acquisition module uses a high-frequency sampling of 500kHz, which achieves the best balance in the range of 100kHz to 1MHz: compared with the relatively low-frequency sampling below 200kHz, 500kHz can effectively capture the microsecond-level high-frequency impact signal generated in the early stage of glitch, avoiding missed detection; compared with the relatively high-frequency sampling above 800kHz, 500kHz significantly reduces the data processing pressure and hardware cost; the photoelectric sensor 11 is fixedly installed on the frame 1 by the mounting bracket 10, bolts and other parts.

[0035] See Figure 1 and Figure 6 The system also includes an electrical control box 6, which houses the signal acquisition module, data processing module, and status judgment module. The electrical control box 6 also has an alarm module electrically connected to the control unit. The electrical control box 6 has a display screen 61. The alarm module receives abnormal judgment signals and issues audible and visual alarms. It also identifies the twisted disc 3 corresponding to the abnormal judgment signal on the display screen 61. By integrating the signal acquisition module, data processing module, and status judgment module into the electrical control box 6, the monitoring system achieves modularity and a compact layout. The alarm module on the electrical control box 6 issues audible and visual alarms upon receiving abnormal judgment signals and accurately identifies the twisted disc 3 corresponding to the abnormal signal on the display screen 61. This eliminates the need for operators to check each device individually, allowing them to quickly identify the location and type of fault, significantly reducing downtime and preventing the generation of batches of defective products. Simultaneously, the intuitive display screen 61 lowers the operating threshold, enabling even inexperienced operators to respond quickly, effectively improving the equipment's intelligence level and production efficiency.

[0036] See Figures 2-4The control unit is also used to adjust the speed of each motor in real time based on the rotational speed signals detected by each photoelectric sensor 11, so as to control the twisting pitch of each twisting disc 3 to be constant. The control unit also dynamically adjusts the speed of the corresponding motor based on the rotational speed signals detected by each photoelectric sensor 11 in real time, ensuring that the speed ratio between each twisting disc 3 and the take-up frame 4 is constant, thereby achieving precise control of the twisting pitch. This closed-loop adjustment mechanism effectively solves the precision drift problem caused by wear in traditional mechanical transmission, avoids uneven wire laying or pitch error caused by speed fluctuations, and improves the quality stability and consistency of the finished flexible shaft.

[0037] See Figure 1 The frame 1 is equipped with multiple manual switch boxes 7, each corresponding to a motor and used for manually starting and stopping the corresponding motor. This is particularly useful during equipment debugging, fault diagnosis, or single-strand wire replacement. Operators can independently control specific strands 3 without shutting down the entire machine, significantly improving maintenance efficiency and operational flexibility. Simultaneously, the manual switch boxes 7 serve as a supplementary redundancy to the automatic control system, ensuring manual intervention is still possible in case of control system malfunctions, thus enhancing equipment safety and operability.

[0038] See Figure 1 and Figure 2 The frame 1 is equipped with a pre-bending turntable 8 for pre-bending the strands drawn from the stranding reel 3. During operation, the strands drawn from the stranding reel 3 near the take-up frame 4 are wound around the pre-bending turntable 8 for pre-bending. After bending, they are drawn to the take-up frame 4 for take-up. The frame 1 is equipped with a protective plate 9, which is placed on the upper side of the pre-bending turntable 8. A bracket 91 connects the protective plate 9 to the frame 1. The protective plate 9 is made of transparent acrylic or explosion-proof glass. By setting up the pre-bending turntable 8, the strands drawn from the stranding reel 3 near the take-up frame 4 are pre-bent, eliminating internal stress in the strands and maintaining a stable shape during subsequent take-up, avoiding uneven wire laying due to springback. At the same time, the protective plate 9 made of transparent acrylic or explosion-proof glass on the frame 1 is fixed to the upper side of the pre-bending turntable 8 by the bracket 91. This allows the operator to observe the pre-bending effect in real time and effectively isolates high-speed rotating parts, preventing broken wires from splashing or oil from being thrown out, ensuring operational safety.

[0039] See Figure 1The frame 1 is equipped with a metal protective cover 5, which covers the upper side of the stranding disc 3. One end of the metal protective cover 5 is hinged to the frame 1, and the other end is equipped with a handle 51. The metal protective cover 5 can effectively isolate the high-speed rotating stranding disc 3 during equipment operation, preventing broken wires from splashing or oil from being thrown out and injuring operators, thus ensuring production safety. When it is necessary to thread, inspect, or replace strands, the operator can easily open the protective cover 5 by holding the handle 51, which is convenient and quick. The hinged structure avoids the loss of the protective cover after disassembly, balancing the reliability of safety protection with the convenience of operation and maintenance.

[0040] Furthermore, this invention also provides an automotive flexible shaft, manufactured using the aforementioned steel wire flexible shaft winding device. During the production process, the rotational speed fluctuations of each stranding disc 3 are monitored in real time by a photoelectric sensor 11. Combined with intelligent analysis from a signal acquisition module, data processing module, and status discrimination module, this effectively identifies and helps avoid hidden faults such as burrs and broken wires in the strands. Therefore, this automotive flexible shaft has uniform stranding pitch and consistent internal stress, resulting in higher fatigue life and torque transmission stability, meeting the stringent quality requirements of automotive transmission systems for core components.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A device for winding a flexible steel wire shaft, characterized in that, The device includes a frame (1), which is equipped with a pay-off frame (2), a stranding reel (3), a take-up frame (4), a motor, and a control unit. Multiple stranding reels (3) and motors are provided, each corresponding to a specific strand. The motors drive the corresponding stranding reels (3) to rotate. The pay-off frame (2) is wound with a wire core (21), and the stranding reel (3) is wound with a strand to be stranded (31). The frame (1) is equipped with multiple photoelectric sensors (11) corresponding to each stranding reel (3). The photoelectric sensors (11) are placed on one side of the stranding reel (3), with the stranding reel (3) close to the photoelectric sensors (11). 1) One side is provided with multiple reflectors (32). The motor and the photoelectric sensor (11) are both connected to the control unit by electrical signal. The photoelectric sensor (11) is used to detect the rotation speed signal of the corresponding stranding disc (3) and transmit the rotation speed signal to the control unit. During operation, the wire core (21) led out from the wire feeder (2) passes through multiple stranding discs (3) in sequence. The rotation action of the stranding disc (3) winds the strands (31) to be twisted onto the wire core (21) to make a finished flexible shaft. The take-up frame (4) takes up the finished flexible shaft.

2. The steel wire flexible shaft winding device according to claim 1, characterized in that, Multiple reflectors (32) are arranged in opposite directions along the circumference of the twisting disc (3) at non-equidistant intervals, and the reflectors (32) are embedded in the twisting disc (3).

3. The steel wire flexible shaft winding device according to claim 1, characterized in that, The control unit includes: The signal acquisition module is electrically connected to each of the photoelectric sensors (11) and is used to perform high-frequency sampling of the rotation speed signal and record the arrival timestamp of each pulse. The data processing module is electrically connected to the signal acquisition module and is used to calculate the instantaneous speed fluctuation curve of each of the stranding discs (3) according to the timestamp, and to decompose the instantaneous speed fluctuation curve to extract the features reflecting the mechanical vibration state of the stranding discs (3). The features include time domain features and frequency domain features. The status discrimination module is electrically connected to the data processing module. It has a normal operating condition feature database inside, which is used to compare the extracted features with the database and output an abnormal discrimination signal when the features exceed a preset threshold range.

4. The steel wire flexible shaft winding device according to claim 3, characterized in that, The state discrimination module is also used to perform a horizontal comparison of the features of multiple stranding discs (3). When the difference between the feature of one stranding disc (3) and the feature of other stranding discs exceeds a preset coordination threshold, a discrimination signal indicating that the strand of the stranding disc (3) is abnormal is output. The sampling frequency of the signal acquisition module is 100kHz-1MHz.

5. The steel wire flexible shaft winding device according to claim 4, characterized in that, It also includes an electrical control box (6), in which the signal acquisition module, the data processing module and the status discrimination module are all located. The electrical control box (6) is also equipped with an alarm module that is electrically connected to the control unit. The electrical control box (6) is equipped with a display screen (61). The alarm module is used to receive the abnormal discrimination signal and issue an audible and visual alarm. The alarm module is also used to mark the twisting disc (3) corresponding to the abnormal discrimination signal on the display screen (61).

6. The steel wire flexible shaft winding device according to claim 1, characterized in that, The control unit is also used to adjust the rotational speed of each motor in real time according to the rotational speed signal detected by each of the photoelectric sensors (11) so as to control the twisting pitch of each of the twisting discs (3) to be constant.

7. The steel wire flexible shaft winding device according to claim 1, characterized in that, The frame (1) is provided with multiple manual switch boxes (7), each of which corresponds to a motor and is used to manually start and stop the corresponding motor.

8. The wire flexible shaft winding device according to claim 1, characterized in that, The frame (1) is provided with a pre-bending turntable (8) for pre-bending the strands drawn out from the stranding disc (3). During operation, the strands drawn out from the stranding disc (3) near the take-up frame (4) are wound around the pre-bending turntable (8) for pre-bending. After bending, they are drawn out to the take-up frame (4) for take-up. The frame (1) is provided with a protective plate (9). The protective plate (9) is placed on the upper side of the pre-bending turntable (8). A bracket (91) is connected between the protective plate (9) and the frame (1). The protective plate (9) is made of transparent acrylic or explosion-proof glass.

9. The wire flexible shaft winding device according to any one of claims 1-8, characterized in that, The frame (1) is provided with a metal protective cover (5), which covers the upper side of the winch (3). One end of the metal protective cover (5) is hinged to the frame (1), and the other end of the metal protective cover (5) is provided with a handle (51).

10. A flexible shaft for automobiles, characterized in that, It is manufactured by the wire flexible shaft winding device according to any one of claims 1-9.

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