Servo-driven traction mechanism for accurate positioning

Abstract

The utility model discloses a kind of servo drive traction mechanism for accurate positioning, it is related to mechanical automation and precision positioning technical field, including pedestal, servo drive assembly, clamping unit and feedback adjustment module, wherein pedestal is the support frame of integrated structure;Servo drive assembly is installed in the side end surface of pedestal, its output shaft is through pedestal and is connected with clamping unit.The utility model provides a kind of servo drive traction mechanism for accurate positioning, clamping unit is driven to move transversely by screw mechanism, feedback adjustment module utilizes pressure sensor and displacement encoder real-time monitoring and adjusts operating state, auxiliary support component reduces vibration, shock-absorbing device absorbs vibration energy, and wireless communication module realizes remote monitoring.The application can improve the positioning accuracy of traction mechanism, response speed and dynamic adjustment capability, while enhancing operating stability, reduce environmental influence, with higher practicality and popularization value.

Description

Technical Field

[0001] This utility model relates to the field of mechanical automation and precision positioning technology, specifically to a servo-driven traction mechanism for accurate positioning. Background Technology

[0002] Traction mechanisms are commonly used in various production lines, primarily for clamping, pulling, and positioning materials, and achieving efficient conveying through dynamic adjustments. Existing traction mechanisms have limitations in positioning accuracy and response speed. For example, a strip traction mechanism (publication number CN109052030B) clamps and pulls the strip through the cooperation of upper and lower clamping rollers, and adjusts the clamping position using lateral and vertical telescopic mechanisms to accommodate strips of different specifications. However, this technical solution relies on motor drive and mechanical structure adjustment, lacking a high-precision servo control system, which may lead to response lag or large positioning errors during dynamic positioning. Furthermore, its complex structural design increases maintenance costs and operational difficulty, potentially affecting long-term operational stability.

[0003] For example, a traction mechanism and device disclosed in CN112061699B achieves stable traction of autoclaved lightweight concrete components by switching between pushing and pulling postures, and is designed with posture holding capability to avoid accidental reversal. However, this technical solution is mainly aimed at specific application scenarios, has low versatility, and does not involve the application of servo drive technology, making it difficult to meet the high-precision positioning requirements of other fields. Furthermore, its traction force adjustment method is relatively simple and cannot be dynamically adjusted in real time according to load changes, which may lead to instability and reduced efficiency during the traction process.

[0004] The aforementioned problems indicate that existing traction mechanisms still require improvement in servo drive control, dynamic response capabilities, and high-precision positioning. Therefore, this invention provides a servo-driven traction mechanism for accurate positioning, aiming to improve the positioning accuracy and response speed of the traction mechanism by introducing a high-performance servo drive system combined with optimized mechanical structure design, while also enhancing its versatility and stability to meet the demands of modern industry for efficient and precise traction equipment. Utility Model Content

[0005] This invention provides a servo-driven traction mechanism for accurate positioning, aiming to overcome the shortcomings of existing traction mechanisms in terms of positioning accuracy, response speed, and dynamic adjustment capability. The specific solution is as follows:

[0006] A servo-driven traction mechanism for accurate positioning includes a base, a servo drive assembly, a clamping unit, and a feedback adjustment module. The base is a support frame of an integral structure. The servo drive assembly is mounted on one end face of the base, and its output shaft passes through the base and is connected to the clamping unit. The clamping unit is located in the middle region of the base and forms a sliding fit with the base through a guide groove. The feedback adjustment module is mounted on the top of the clamping unit and is connected to the servo drive assembly through a signal cable.

[0007] The clamping unit includes a first clamping plate and a second clamping plate arranged symmetrically in the transverse direction. The first clamping plate is fixed to the inner side of the base, and the second clamping plate is slidably connected to the guide groove via a slider. The bottom of the slider is provided with a ball bearing, which is embedded in the guide groove and rolls in contact with it. Multiple limiting holes are provided on both sides of the guide groove, and elastic locking pins are installed inside the limiting holes. The ends of the elastic locking pins fit against the side walls of the slider to limit the range of movement of the slider.

[0008] The servo drive assembly includes a servo motor, a transmission gear set, and a lead screw mechanism. The output shaft of the servo motor is connected to the input end of the transmission gear set via a coupling, and the output end of the transmission gear set meshes with the screw of the lead screw mechanism. The nut of the lead screw mechanism is fixedly connected to the back of the second clamping plate. When the servo motor drives the transmission gear set to rotate, the lead screw mechanism drives the second clamping plate to move laterally along the guide groove.

[0009] Furthermore, the feedback adjustment module includes a pressure sensor, a displacement encoder, and a control unit. The pressure sensor is installed on the inner surface of the first and second clamping plates to detect pressure changes in the clamped material. The displacement encoder is installed on the screw end of the lead screw mechanism to monitor the displacement of the second clamping plate in real time. The control unit receives signals from the pressure sensor and the displacement encoder and adjusts the operating state of the servo motor according to preset parameters.

[0010] In addition, an auxiliary support assembly is installed on the top of the base. The auxiliary support assembly includes a support frame and an adjustable support arm. The support frame is vertically fixed to the top surface of the base, and a horizontal guide rail is provided on the top of the support frame. The adjustable support arm is slidably connected to the horizontal guide rail via a slider. A universal roller is installed at the end of the adjustable support arm. The wheel surface of the universal roller keeps in contact with the top of the clamping unit to reduce the vibration of the clamping unit during movement.

[0011] Furthermore, a shock-absorbing device is provided at the bottom of the base. The shock-absorbing device includes a base plate, shock-absorbing springs, and dampers. The base plate is fixedly connected to the base with bolts. The shock-absorbing springs are evenly distributed between the base plate and the base. The dampers are installed inside the shock-absorbing springs, and their two ends are fixedly connected to the base plate and the base, respectively. The shock-absorbing device absorbs the vibration energy generated by the base during operation through the synergistic effect of the shock-absorbing springs and dampers.

[0012] In addition, the servo drive assembly is equipped with a protective cover, and the inner wall of the protective cover is lined with sound-insulating material to reduce the noise generated by the servo motor during operation. The top of the protective cover is equipped with heat dissipation holes, and a filter screen is installed inside the heat dissipation holes to prevent dust from entering the protective cover.

[0013] An operation panel is installed on the base side away from the servo drive component. The surface of the operation panel is equipped with a display screen and buttons. The display screen is used to show the operating status and parameter information of the clamping unit, and the buttons are used to set the operating mode and parameters of the servo drive component. The operation panel is connected to the control unit via a signal cable.

[0014] The power module is installed at the rear of the base. The power module includes a rectifier, a voltage regulator and a backup battery. The rectifier converts the external AC power into DC power. The voltage regulator regulates the DC power and supplies it to the servo drive components and control unit. The backup battery automatically switches to power supply when the external power is interrupted to ensure the continuous operation of the traction mechanism.

[0015] A wireless communication module is installed on the top of the feedback adjustment module. The wireless communication module is connected to external devices through a signal antenna for remote monitoring and data transmission. The wireless communication module is connected to the control unit through a signal cable to upload the operating data of the clamping unit in real time.

[0016] Compared with the prior art, the present invention has at least the following characteristics:

[0017] 1. This device achieves high-precision lateral movement of the clamping unit through the combination of servo drive components and lead screw mechanism. It can dynamically adjust according to changes in material size and load, thereby improving the positioning accuracy and response speed of the traction mechanism.

[0018] 2. Through the design of the feedback adjustment module, the device uses pressure sensors and displacement encoders to monitor the status of the clamping unit in real time, and adjusts the operating parameters of the servo motor through the control unit, thereby avoiding the response lag problem caused by mechanical structure adjustment in traditional traction mechanisms.

[0019] 3. By setting up auxiliary support components, this device reduces the vibration of the clamping unit during movement, enhances the operational stability of the traction mechanism, and extends the service life of the equipment.

[0020] 4. Through the design of the shock absorption device, this device effectively absorbs the vibration energy generated by the base during operation, reduces the impact of equipment operation on the surrounding environment, and improves the working efficiency of the traction mechanism.

[0021] 5. By introducing a wireless communication module, this device enables remote monitoring and data transmission, allowing users to monitor the operating status of the traction mechanism in real time and adjust parameters according to actual needs.

[0022] This utility model, through the above-mentioned technical solution, solves the shortcomings of existing traction mechanisms in terms of positioning accuracy, response speed, and dynamic adjustment capability, and has high practicality and promotion value. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention, showing the layout relationship of the base, servo drive assembly, clamping unit and feedback adjustment module.

[0025] Figure 2 This utility model Figure 1 A side view structural diagram.

[0026] Figure 3 This utility model Figure 2 Enlarged view of point A.

[0027] Figure 4 This utility model Figure 2 Enlarged view of point B.

[0028] Figure 5 This utility model Figure 2 Enlarged view of point C.

[0029] Figure 6 This utility model Figure 2 A partial structural diagram.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Base; 2. Servo drive assembly; 3. Clamping unit; 4. Feedback adjustment module; 5. First clamping plate; 6. Second clamping plate; 7. Slider; 8. Guide groove; 9. Servo motor; 10. Transmission gear set; 11. Lead screw mechanism; 12. Pressure sensor; 13. Displacement encoder; 14. Control unit; 15. Auxiliary support assembly; 16. Vibration damping device; 17. Operation panel; 18. Power module; 19. Wireless communication module. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0033] This utility model provides a servo-driven traction mechanism for accurate positioning, and its specific implementation is described in detail with reference to the accompanying drawings. Figure 1 The overall structural diagram shows that the traction mechanism mainly includes a base 1, a servo drive assembly 2, a clamping unit 3, and a feedback adjustment module 4. The base 1, serving as the supporting frame of the overall structure, is a rectangular box made of high-strength aluminum alloy to ensure sufficient rigidity and stability. The servo drive assembly 2 is mounted on one end face of the base 1, and its output shaft passes through the base 1 and connects to the clamping unit 3. The clamping unit 3 is located in the central area of ​​the base 1 and slides against it via a guide groove 8. The feedback adjustment module 4 is mounted on the top of the clamping unit 3 and is connected to the servo drive assembly 2 via a signal cable.

[0034] Combination Figure 2 The clamping unit 3 includes a first clamping plate 5 and a second clamping plate 6, which are arranged symmetrically laterally. The first clamping plate 5 is fixed to the inner side of the base 1, and its bottom is tightly connected to the base 1 by bolts. The second clamping plate 6 is slidably connected to the guide groove 8 via a slider 7. The bottom of the slider 7 is embedded with balls, which roll in contact with the bottom surface of the guide groove 8, thereby reducing friction and improving sliding efficiency. Multiple limiting holes are opened on both side walls of the guide groove 8, and elastic locking pins are installed inside the limiting holes. The ends of the elastic locking pins fit against the side walls of the slider 7 to limit the movement range of the slider 7 and ensure that the second clamping plate 6 moves within a predetermined range without deviation.

[0035] The specific structure of servo drive component 2 is as follows: Figure 3 As shown, the system includes a servo motor 9, a transmission gear set 10, and a lead screw mechanism 11. The servo motor 9 is bolted to one end face of the base 1, and its output shaft is connected to the input end of the transmission gear set 10 via a coupling. The transmission gear set 10 consists of multiple gears, which mesh to transmit power, ultimately transmitting the rotational motion of the servo motor 9 to the screw of the lead screw mechanism 11. The nut of the lead screw mechanism 11 is bolted to the back of the second clamping plate 6. When the servo motor 9 drives the transmission gear set 10 to rotate, the lead screw mechanism 11 drives the second clamping plate 6 to move laterally along the guide groove 8. Both ends of the lead screw mechanism 11 are fixed to the base 1 via bearings to ensure smooth operation.

[0036] The structure of feedback adjustment module 4 is as follows: Figure 4As shown, the system includes a pressure sensor 12, a displacement encoder 13, and a control unit 14. The pressure sensor 12 is mounted on the inner surface of the first clamping plate 5 and the second clamping plate 6, with its probe in direct contact with the clamped material to detect pressure changes during clamping. The displacement encoder 13 is mounted on the end of the screw of the lead screw mechanism 11, and monitors the displacement of the second clamping plate 6 in real time by reading the rotation angle of the screw. The control unit 14 receives signals from the pressure sensor 12 and the displacement encoder 13, and adjusts the operating state of the servo motor 9 according to preset parameters. The control unit 14 is connected to the pressure sensor 12, the displacement encoder 13, and the servo motor 9 via signal cables to achieve closed-loop control.

[0037] The structure of the auxiliary support component 15 is as follows Figure 5 As shown, the system includes a support frame and an adjustable support arm. The support frame is vertically fixed to the top surface of the base 1, with its bottom welded to the base 1 and a horizontal guide rail at its top. The adjustable support arm is slidably connected to the horizontal guide rail via a slider. Ball bearings are embedded in the bottom of the slider, and these ball bearings roll in contact with the surface of the horizontal guide rail, allowing for flexible movement of the adjustable support arm. A swivel caster is mounted at the end of the adjustable support arm, with its wheel surface in contact with the top of the clamping unit 3 to reduce vibration during movement. The axle of the swivel caster is connected to the end of the adjustable support arm via a bearing to ensure its free rotation.

[0038] The internal structure of the shock absorber 16 is as follows Figure 6 As shown, the system includes a base plate, damping springs, and dampers. The base plate is fixedly connected to the base 1 by bolts. The damping springs are evenly distributed between the base plate and the base 1, with their ends connected to the base plate and the base 1 by threads, respectively. The dampers are installed inside the damping springs, with their ends fixedly connected to the base plate and the base 1 by bolts, respectively. The damping device 16 absorbs the vibration energy generated by the base 1 during operation through the synergistic effect of the damping springs and dampers, while preventing the vibration from being transmitted to the ground.

[0039] The servo drive assembly 2 is equipped with a protective cover. The inner wall of the cover is lined with sound-insulating material, which is made of high-density foam, to reduce the noise generated by the servo motor 9 during operation. The top of the cover has ventilation holes, inside which are installed stainless steel filters to prevent dust from entering the cover. An operation panel 17 is mounted on the side of the base 1 furthest from the servo drive assembly 2. The surface of the operation panel 17 has a display screen and buttons. The display screen shows the operating status and parameter information of the clamping unit 3, and the buttons are used to set the operating mode and parameters of the servo drive assembly 2. The operation panel 17 is connected to the control unit 14 via a signal cable to enable human-machine interaction.

[0040] A power module 18 is installed at the rear end of the base 1. The power module 18 includes a rectifier, a voltage regulator, and a backup battery. The rectifier converts external AC power into DC power, and the voltage regulator regulates the DC power before supplying it to the servo drive assembly 2 and the control unit 14. The backup battery automatically switches power supply when the external power supply is interrupted, ensuring the continuous operation of the traction mechanism. The backup battery is connected to the rectifier and voltage regulator via relays, which automatically switch the power supply path according to the power status.

[0041] A wireless communication module 19 is mounted on the top of the feedback adjustment module 4. The wireless communication module 19 connects to external devices via a signal antenna for remote monitoring and data transmission. The wireless communication module 19 is also connected to the control unit 14 via a signal cable, uploading real-time operating data of the clamping unit 3. The wireless communication module 19 uses an industrial-grade wireless module, supporting multiple communication protocols to ensure the stability and reliability of data transmission.

[0042] In practical applications, the working principle of this traction mechanism is as follows: First, the operating parameters of the servo drive component 2, such as clamping speed and clamping force, are set through the operation panel 17. Then, the servo motor 9 is started, and the servo motor 9 drives the lead screw mechanism 11 to rotate through the transmission gear set 10. The lead screw mechanism 11 drives the second clamping plate 6 to move along the guide groove 8 until it clamps the material together with the first clamping plate 5. During this process, the pressure sensor 12 detects the pressure changes of the clamped material in real time, and the displacement encoder 13 monitors the displacement of the second clamping plate 6 in real time and transmits the signal to the control unit 14. The control unit 14 adjusts the operating state of the servo motor 9 according to the received signal to ensure clamping accuracy and stability. Simultaneously, the universal rollers of the auxiliary support component 15 maintain contact with the top of the clamping unit 3 to reduce vibration during movement. The shock absorption device 16 absorbs the vibration energy generated during operation through shock-absorbing springs and dampers, reducing the impact of the equipment on the surrounding environment. The wireless communication module 19 uploads the operating data of the clamping unit 3 in real time, facilitating remote monitoring and parameter adjustment by the user.

[0043] The above embodiments describe in detail the specific structure and working principle of this utility model. The connection relationship, positional relationship and mutual cooperation relationship between all components have been clearly defined, enabling those skilled in the art to implement the technical solution according to the contents of the specification.

[0044] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0045] In automated production lines, this servo-driven traction mechanism is used to clamp, pull, and position metal sheets of different specifications. The specific operating steps are as follows:

[0046] First, the operating parameters of the servo drive component 2 are set on the operation panel 17, including clamping speed, clamping force, and target displacement. Then, the servo motor 9 is started, and the servo motor 9 transmits the rotational motion to the lead screw mechanism 11 through the transmission gear set 10. The screw of the lead screw mechanism 11 is fixedly connected to the nut on the back of the second clamping plate 6. When the screw rotates, it drives the second clamping plate 6 to move laterally along the guide groove 8. Ball bearings are embedded inside the guide groove 8, and these balls roll in contact with the bottom of the slider 7, significantly reducing friction and ensuring smooth and efficient movement of the second clamping plate 6. Simultaneously, elastic latches on both sides of the guide groove 8 limit the range of movement of the slider 7, preventing the second clamping plate 6 from exceeding the predetermined position, thus achieving precise lateral displacement control.

[0047] During the clamping process, pressure sensor 12 is installed on the inner surface of the first clamping plate 5 and the second clamping plate 6, with its probe directly contacting the metal sheet to detect pressure changes in real time. Simultaneously, displacement encoder 13 is installed at the end of the screw of the lead screw mechanism 11, calculating the actual displacement of the second clamping plate 6 by reading the screw's rotation angle. This data is transmitted to control unit 14 via signal cables, and control unit 14 dynamically adjusts the operating state of servo motor 9 according to preset parameters. For example, when pressure sensor 12 detects that the clamping pressure exceeds a set threshold, control unit 14 reduces the output power of servo motor 9 to prevent material deformation due to excessive clamping; conversely, when the displacement fed back by displacement encoder 13 does not reach the target value, control unit 14 increases the speed of servo motor 9 to ensure that clamping unit 3 can quickly reach the target position.

[0048] During the movement of the clamping unit 3, the adjustable support arm of the auxiliary support assembly 15 moves flexibly along the horizontal guide rail via a slider, with its end omnidirectional roller always maintaining contact with the top of the clamping unit 3. This design effectively reduces the vibration generated by the clamping unit 3 during movement, improving the overall operational stability. Simultaneously, the shock absorption device 16 at the bottom of the base 1, through the combined action of shock-absorbing springs and dampers, absorbs the vibration energy generated during equipment operation, further reducing the impact of vibration on the surrounding environment. The elastic deformation of the shock-absorbing springs and the damping effect of the dampers work together to ensure that vibration energy is effectively dispersed, preventing its transmission to the ground.

[0049] In addition, the wireless communication module 19 connects to the remote monitoring device via a signal antenna to upload real-time operating data of the clamping unit 3, including clamping pressure, displacement, and the operating status of the servo motor 9. Users can view this data via a remote terminal and adjust the parameter settings on the operation panel 17 according to actual needs. For example, when the production line needs to switch to different specifications of metal sheets, users can send commands via the remote terminal to adjust the operating parameters of the servo drive component 2, thereby achieving rapid switching and precise positioning.

[0050] Through the above steps, the servo-driven traction mechanism achieves high-precision clamping and positioning. Specifically, the combination of the servo motor 9 and the lead screw mechanism 11 ensures that the displacement accuracy of the second clamping plate 6 reaches the micrometer level, meeting the high-precision positioning requirements of modern industry. Simultaneously, the closed-loop control mechanism of the feedback adjustment module 4 significantly improves the system's dynamic response capability, avoiding the lag problems caused by traditional mechanical structure adjustments. The design of the auxiliary support component 15 and the shock absorption device 16 further enhances the stability and reliability of the equipment, extending its service life.

[0051] In summary, this utility model achieves efficient and precise traction operation in practical applications through the coordinated work of its components, overcoming the shortcomings of existing technologies in terms of positioning accuracy, response speed, and stability, and possesses high practical value and promising prospects for promotion.

[0052] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A servo-driven traction mechanism for accurate positioning, characterized in that, It includes a base (1), a servo drive assembly (2), a clamping unit (3), and a feedback adjustment module (4); the base (1) is a support frame of the overall structure; the servo drive assembly (2) is installed on one side end face of the base (1), and its output shaft passes through the base (1) and is connected to the clamping unit (3); the clamping unit (3) is located in the middle area of ​​the base (1) and forms a sliding fit with the base (1) through a guide groove (8); the feedback adjustment module (4) is installed on the top of the clamping unit (3) and is connected to the servo drive assembly (2) through a signal cable.

2. The servo-driven traction mechanism for accurate positioning according to claim 1, characterized in that, The clamping unit (3) includes a first clamping plate (5), a second clamping plate (6), and a slider (7); the first clamping plate (5) is fixed to the inner side of the base (1); the second clamping plate (6) is slidably connected to the guide groove (8) through the slider (7); the bottom of the slider (7) is provided with a ball, which is embedded in the guide groove (8) and rolls in contact with it; the guide groove (8) has limit holes on both sides, and elastic pins are installed inside the limit holes, with the ends of the elastic pins fitting against the side walls of the slider (7).

3. The servo-driven traction mechanism for accurate positioning according to claim 1, characterized in that, The servo drive assembly (2) includes a servo motor (9), a transmission gear set (10), and a lead screw mechanism (11); the output shaft of the servo motor (9) is connected to the input end of the transmission gear set (10) via a coupling; the output end of the transmission gear set (10) meshes with the screw of the lead screw mechanism (11); the nut of the lead screw mechanism (11) is fixedly connected to the back of the second clamping plate (6).

4. The servo-driven traction mechanism for accurate positioning according to claim 1, characterized in that, The feedback adjustment module (4) includes a pressure sensor (12), a displacement encoder (13), and a control unit (14); the pressure sensor (12) is installed on the inner surface of the first clamping plate (5) and the second clamping plate (6); the displacement encoder (13) is installed on the screw end of the lead screw mechanism (11); the control unit (14) is connected to the pressure sensor (12), the displacement encoder (13), and the servo motor (9) respectively through signal cables.

5. A servo-driven traction mechanism for accurate positioning according to claim 1, characterized in that, It also includes an auxiliary support assembly (15); the auxiliary support assembly (15) includes a support frame and an adjustable support arm; the support frame is vertically fixed to the top surface of the base (1), and a horizontal guide rail is provided on the top of the support frame; the adjustable support arm is slidably connected to the horizontal guide rail by a slider; the end of the adjustable support arm is equipped with a universal roller, and the wheel surface of the universal roller is in contact with the top of the clamping unit (3).

6. A servo-driven traction mechanism for accurate positioning according to claim 1, characterized in that, It also includes a shock-absorbing device (16); the shock-absorbing device (16) includes a base plate, a shock-absorbing spring and a damper; the base plate is fixedly connected to the base (1) by bolts; the shock-absorbing spring is evenly distributed between the base plate and the base (1); the damper is installed inside the shock-absorbing spring and its two ends are fixedly connected to the base plate and the base (1) respectively.

7. A servo-driven traction mechanism for accurate positioning according to claim 1, characterized in that, It also includes an operation panel (17); the operation panel (17) is mounted on the side of the base (1) away from the servo drive assembly (2); the surface of the operation panel (17) is provided with a display screen and buttons; the operation panel (17) is connected to the control unit (14) via a signal cable.

8. A servo-driven traction mechanism for accurate positioning according to claim 1, characterized in that, It also includes a wireless communication module (19); the wireless communication module (19) is installed on top of the feedback adjustment module (4); the wireless communication module (19) is connected to an external device through a signal antenna; the wireless communication module (19) is connected to the control unit (14) through a signal cable.

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