Electric wire tightening device

Abstract

The invention relates to the field of wire tighteners, and provides an electric wire tightening device which comprises an upper lifting hook assembly, a chain, a lower lifting hook assembly and a wire tightener body. The tightener body comprises a speed reducer, a driving assembly and a limiting module; wherein the upper lifting hook assembly is used for being hooked on a fixing piece; the first end of the chain is fixed to the lower lifting hook assembly, and the second end of the chain penetrates out of a chain through hole of the speed reducer. The limiting module is used for sensing whether the actual distance between the lower lifting hook assembly and / or the second end of the chain and the bottom of the tightener body reaches the set limiting distance or not, and the driving assembly is configured to stop running after the actual distance reaches the set limiting distance. Through the limiting module, excessive stretching of the chain or equipment damage can be avoided; the upper lifting hook assembly and the tightener body are designed in a split manner, so that stress of different parts can be reasonably shared, stable operation of equipment is ensured, and higher use flexibility is provided; the invention also provides a plurality of control modes and energy complementing modes, and is suitable for a plurality of application scenes.

Description

Technical Field

[0001] The invention relates to the technical field of wire tighteners, and in particular to an electric wire tightener. Background Art

[0002] A wire tensioner, also known as a ratchet tensioner, is a tool widely used in overhead line construction. It is mainly used to tighten and tension the wire to ensure that the tension and position of the wire meet the design requirements. During the installation of transmission lines, the wire tensioner is not only used to tighten the wire, but also to adjust the position of equipment or equipment, replace insulators, install or remove other equipment, etc. Double hook wire tensioners are one of the common types. They play a key role in the installation of transmission lines and are usually used in conjunction with other construction equipment to ensure that the tensioning operation during the construction process can proceed smoothly.

[0003] Although existing tensioners meet the basic construction requirements to a certain extent, they also have some significant disadvantages, which are specifically manifested in the following aspects: 1. Single operation mode, time-consuming and labor-intensive: Most tensioners on the market currently rely on manual operation; this means that operators need to rely on manual power to tighten the wires or tension the equipment, which is a cumbersome and time-consuming process; this manual method not only increases labor intensity, but also reduces work efficiency, especially in long-term and high-intensity operations, which can easily cause operator fatigue.

[0004] 2. Limited bearing capacity: Traditional tensioners are usually designed with a small bearing capacity and cannot withstand large loads. In some construction scenarios that require high-load tensioning operations, the bearing capacity of this equipment is particularly insufficient. For example, when tensioning heavy-loaded wires or debugging equipment, existing tensioners may not provide sufficient force, resulting in operational difficulties and even equipment damage or accidents.

[0005] 3. The equipment is heavy and bulky: Traditional tensioners are mostly made of metal materials, and the overall equipment is relatively bulky. Especially when performing aerial work, the weight and volume of the equipment not only increase the difficulty of handling and installation, but also bring certain hidden dangers to the safety of operators. The equipment is large, difficult to carry and use, and reduces the flexibility and convenience of construction.

[0006] 4. The one-piece hook design is inconvenient: Some tensioners use an one-piece hook design, combining the sprocket with the load-bearing hook. Although the original intention of this design was to simplify the structure, it actually brings many inconveniences. First, the operator cannot flexibly adjust the position of the hook when hooking and disassembling the equipment; second, this design usually cannot withstand a larger load, which limits the scope of use of the tensioner, especially in high-intensity construction that needs to withstand a larger weight, it is easy to cause equipment failure due to excessive load.

[0007] 5. Unreasonable design of the limit structure: The limit structure of the tensioner is mainly used to control the extreme movement position of the equipment to ensure that the equipment will not be over-stretched or contracted, prevent it from exceeding the load range of the equipment, and protect the normal operation of the equipment. However, the limit device of the existing equipment may have improper design problems, resulting in the chain or ratchet failing to effectively shut down or stop running when it reaches the extreme position. For example, the chain may continue to run when it reaches the top or bottom, increasing the risk of equipment damage. When the limit position is reached, if there is no sufficient buffer or accurate stop device, the chain or other components may be over-stretched or over-loaded, causing wear or damage to equipment parts, or even safety accidents.

[0008] In summary, although the existing tensioners can complete the basic tensioning tasks in overhead line construction, they are time-consuming and labor-intensive, have insufficient bearing capacity, are bulky, and are inconvenient to operate, which limits their application in high-intensity and high-load construction environments. With the continuous advancement of construction technology, the requirements for tensioners are also constantly increasing. There is an urgent need to improve and upgrade existing equipment to improve operating efficiency, ensure construction safety, and meet the challenges of different construction needs. Summary of the invention

[0009] In view of this, an embodiment of the present invention provides an electric wire tightening device to eliminate or improve one or more defects existing in the prior art.

[0010] In some embodiments, the electric tensioning device includes an upper hook assembly, a chain, a lower hook assembly, and a tensioner body; the tensioner body includes a reducer, a drive assembly, and a limit module; Wherein, the upper hook assembly is used to hook on the fixing member to serve as a force-bearing structure; The lower hook assembly is used to hook the cable to be tensioned or the object to be lifted; The first end of the chain is fixed to the lower hook assembly, the middle part of the chain is also wound around the pulley block of the upper hook assembly and the pulley block of the lower hook assembly and the sprocket of the reducer, and the second end of the chain passes through the chain through hole of the reducer; The limit module is used to sense the actual distance from the lower hook assembly and / or the second end of the chain to the bottom of the tensioner body or whether it reaches a set limit distance, and the drive assembly is configured to stop running after the actual distance reaches the set limit distance.

[0011] In some embodiments, the limit module includes a passive limit sensor, and the passive limit sensor is arranged at the bottom of the tensioner body; The lower hook assembly comprises a lower hook, a lower hook pulley block and a lower hook bracket, wherein the lower hook is arranged at the bottom of the lower hook bracket, the lower hook pulley block is rotatably arranged in the lower hook bracket, and the top of the lower hook bracket has a flat plate portion; during the line tightening process, in the running direction of the chain, the range of the flat plate portion can cover the passive limit sensor, and the passive limit sensor is used to detect whether the actual distance between the passive limit sensor and the flat plate portion of the lower hook assembly reaches the set limit distance; The second end of the chain is provided with an end limit block, and an integral or separate positioning plate that is inserted into the chain is provided above the end limit block. During the process of tightening the line or lifting, the positioning plate is in a horizontal position, and the positioning plate can cover the passive limit sensor in the vertical direction. The passive limit sensor is used to detect whether the actual distance between the passive limit sensor and the positioning plate reaches the set limit distance. When the chain and the end limit block are separately arranged, the top of the chain end limit block and the positioning plate both extend in the horizontal direction, and the middle part of the positioning plate has a plum blossom hole with the same shape as the chain, so that the positioning plate always maintains a horizontal posture during the rising process.

[0012] In some embodiments, the passive limit sensor includes any one of a laser ranging sensor, an ultrasonic ranging sensor, a photoelectric sensor, a Hall effect sensor, and an inductive ranging sensor.

[0013] In some embodiments, the limit module further includes an active limit unit, which is used to obtain the height position of the first end and / or the second end of the chain in real time, and when the height position reaches the limit distance, the drive assembly is configured to stop running after the actual distance reaches the set limit distance; The active limit unit is used to obtain the height position of the first end and / or the second end of the chain by monitoring the rotation direction and number of turns of the sprocket or the rotation direction and number of turns of the drive assembly and calculating the height position of the first end and / or the second end of the chain in combination with the total length of the chain.

[0014] In some embodiments, the passive limit sensor includes a limit distance adjustment member for adjusting the limit distance; the limit distance range of the limit module is configured to be 2~10mm.

[0015] In some embodiments, the electric tensioning device further comprises a power supply component, and the power supply component and the driving component are respectively arranged on both sides of the tensioning device body; The power supply component includes a battery, a battery charging module and a mains power supply module; wherein the battery is used to provide power to the drive component, the battery charging module is used to charge the power of the energy replenishment battery or the mains into the battery, and the mains power supply module is used to directly connect the drive component to the mains.

[0016] In some embodiments, the driving assembly includes a motor, a gear set and a driving assembly bracket, and the gear set includes a driving gear and a driven gear; The motor is fixedly arranged on one side of the reducer through the driving assembly bracket, the driving gear is installed on the output shaft of the motor, the driven gear is installed on the input main shaft of the reducer, and the driving gear is meshed with the driven gear; A bearing mounting frame is provided on a side of the housing of the reducer facing the motor, and an end of the output shaft of the motor is mounted in the bearing mounting frame through a bearing.

[0017] In some embodiments, a side of the driven gear facing or away from the reducer is a braking surface, and a braking structure for cooperating with a brake pad of the electric tensioning device is provided on the braking surface; The electric wire tightening device also includes an electromagnetic clutch brake. The motor is a DC reduction motor. The electromagnetic clutch brake is connected to the output shaft in the DC reduction motor to provide braking force to the output shaft of the DC reduction motor.

[0018] In some embodiments, the driving assembly further comprises a motor cover and a cooling fan, wherein the cooling fan is arranged on one side of the motor, and the motor cover is provided with a transparent cooling slot in the airflow direction of the cooling fan; The drive assembly also includes a motor overload alarm; The driving component further includes a tension regulating module, which is used to regulate the load current and power of the motor based on the tension value requirement of the load, so as to adjust the initial tension or final tension of the load.

[0019] In some embodiments, the electric tightening device further comprises a display module for displaying at least one of remaining power, real-time current, real-time voltage and real-time power; The electric wire tightening device includes a circuit board and at least one of a wired control module and a wireless control module; The wired control module is connected to the circuit board through a wire, the wireless control module includes a wireless signal receiver and a wireless signal transmitter, and both the wired control module and the wireless control module include buttons for controlling ascending, descending, accelerating, decelerating, and switching; The electric tightening device also includes an Internet of Things communication module, which is used to send the operating status of the electric tightening device to a portable device or a cloud management platform, and is also used to receive control instructions sent by the portable device or the cloud management platform.

[0020] The electric tensioning device provided in the embodiment of the present invention can avoid excessive stretching of the chain or damage to the equipment, or prevent overload or safety hazards through the designed limit module; the upper hook assembly and the tensioner body of the device are designed separately, which can not only reasonably share the force of different parts and ensure the stable operation of the equipment, but also provide higher flexibility, convenience and safety of use; the device also provides a variety of control modes and energy replenishment methods, which is suitable for a variety of application scenarios and has great promotion value and potential.

[0021] Additional advantages, purposes, and features of the present invention will be described in part in the following description, and will become apparent to those skilled in the art after studying the following, or may be learned from the practice of the present invention. The purposes and other advantages of the present invention may be achieved and obtained by the structures specifically indicated in the specification and the accompanying drawings.

[0022] Those skilled in the art will appreciate that the objectives and advantages that can be achieved with the present invention are not limited to the above specific description, and the above and other objectives that can be achieved by the present invention will be more clearly understood from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are only for illustrating the principles of the present invention. In order to facilitate the illustration and description of some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, they may become larger relative to other components in the exemplary device actually manufactured according to the present invention. In the drawings: Figure 1 Schematic diagram of the structure of an electric wire tightening device in one embodiment of the present invention.

[0024] Figure 2 The figure is a three-dimensional diagram of a tensioner body in one embodiment of the present invention at a certain viewing angle.

[0025] Figure 3 FIG. 4 is a three-dimensional diagram of the tensioner body in one embodiment of the present invention from another perspective.

[0026] Figure 4 This is a three-dimensional view of the tensioner body after the motor cover is hidden in one embodiment of the present invention.

[0027] Figure 5 Schematic diagram of the structure of the second end of the chain in one embodiment of the present invention.

[0028] Figure numerals: 1. upper hook assembly; 2. chain; 21. end limit block; 22. positioning plate; 221. plum blossom hole; 3. lower hook assembly; 31. lower hook; 32. lower hook pulley block; 33. lower hook bracket; 331. flat plate; 4. reducer; 41. chain through hole; 5. drive assembly; 51. motor; 511. rotating shaft; 52. driving gear; 53. driven gear; 54. drive assembly bracket; 55. bearing mounting bracket; 56. bearing; 57. motor cover; 571. heat sink; 58. motor overload alarm; 59. display module; 6. power supply assembly; 61. charging interface; 62. AC power interface; 71. wired control interface; 72. wireless signal transmission; 81. passive limit sensor. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0030] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0031] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0032] It should also be noted that, unless otherwise specified, the term “connection” herein may refer not only to a direct connection but also to an indirect connection involving an intermediate.

[0033] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0034] In order to solve or alleviate the problems of time-consuming and labor-intensive, insufficient load-bearing capacity, bulky equipment, inconvenient operation, etc. in the prior art tensioners, the present invention provides an electric tensioner, which can avoid excessive stretching of the chain 2 or damage to the equipment, or prevent overload or safety hazards through the designed limit module; the upper hook assembly 1 and the tensioner body of the device are designed in a split manner, which can not only reasonably share the force of different parts and ensure the stable operation of the equipment, but also provide higher flexibility, convenience and safety; the device also provides a variety of control modes and energy replenishment methods, which is suitable for a variety of application scenarios and has great promotion value and potential.

[0035] In some embodiments, Figure 1 As shown, the electric tensioning device includes an upper hook assembly 1, a chain 2, a lower hook assembly 3, a tensioner body, etc.; the tensioner body includes a reducer 4, a drive assembly 5 and a limit module, etc.

[0036] Among them, the upper hook assembly 1 is used to hook on the fixing part to serve as a force-bearing structure; the lower hook assembly 3 is used to hook the cable to be tensioned or the object to be lifted; the fixing part can be a building structure, equipment, cross arm, overhead pole, etc. The function of the upper hook assembly 1 is to provide a stable hanging point to support the entire electric tensioning device. It can be understood that the electric tensioning device in the embodiment of the present invention can be used vertically, tilted or horizontally. For example, in the case of lifting heavy objects, the upper hook assembly 1 needs to be hung above the position to be reached by the object to be lifted. At this time, the chain 2 is arranged in the vertical direction due to gravity; the upper hook assembly 1 can also be hooked on the fixing part (such as the cross arm) on the pole, and the lower hook assembly 3 hooks the power cable to be tensioned. In this process, the chain 2 may be operated in the horizontal direction or the tilted direction. Through the lower hook assembly 3, the object to be lifted (such as a heavy object, a power cable) is connected to the chain 2 and is lifted or tensioned under the drive of the chain 2.

[0037] The chain 2 is the main power transmission and load support part of the electric tensioning device. The first end of the chain 2 is fixed to the lower hook assembly 3, which plays the role of hanging and supporting the load (such as lifting objects or power cables). The middle part of the chain 2 is also wound around the pulley block of the upper hook assembly 1 and the pulley block of the lower hook assembly 3 and the sprocket of the reducer 4. The second end of the chain 2 is connected from the chain through hole 41 of the reducer 4 (refer to Figure 3 ) through; through this arrangement, the chain 2 can move smoothly, driving the lifting or tensioning of the object to be lifted or the tensioning cable.

[0038] The drive assembly 5 is the power source of the entire electric tensioning device, driving the reducer 4 to work, and then driving the chain 2 to run. The drive assembly 5 controls the movement of the chain 2 through the low-speed and high-torque force generated by the reducer 4, and pushes the lower hook assembly 3 to lift or tension the object. The reducer 4 converts the high-speed movement provided by the drive assembly 5 into a low-speed and high-torque output, ensuring that the chain 2 can smoothly drive the load to lift or tension. The reducer 4 plays a key role in the control of power transmission, ensuring the stability and safety of the equipment during operation.

[0039] The limit module is used to sense the actual distance from the lower hook assembly 3 and / or the second end of the chain 2 to the bottom of the tensioner body or whether it reaches the set limit distance, and the drive assembly 5 is configured to stop running after the actual distance reaches the set limit distance. The limit module monitors the running status of the chain 2 and the lower hook assembly 3 through the sensed distance or position sensor. Once it is detected that the second end of the chain 2 is close to the bottom of the tensioner body and reaches the set limit, the limit module will control the drive assembly 5 to stop operating, thereby avoiding excessive stretching of the chain 2 or damage to the equipment, or preventing overload or safety hazards.

[0040] In the above embodiment, the electric tensioning device of the present invention is capable of effectively lifting heavy objects or tensioning power cables under various operating conditions through a series of precise designs, combined with the upper hook assembly 1, the chain 2, the lower hook assembly 3, and the reducer 4, the drive assembly 5 and the limit module in the tensioner body. The introduction of the limit module further improves safety. Through the automatic stop function, it avoids excessive stretching of the chain 2 or overload of the equipment, ensuring the efficiency and safety of the operation process. This device is suitable for different working environments and can be used vertically, horizontally or tilted to meet diverse operating needs.

[0041] In the above embodiment, the upper hook assembly 1 has no direct connection with the tensioner body. Figure 1As shown, this structural design can not only reasonably share the forces of different parts and ensure the stable operation of the equipment only by setting them apart through the chain 2, but also provide higher flexibility, convenience and safety in use. The upper hook assembly 1 and the tensioner body are set separately, which can effectively share various forces in the operation of the equipment. During the operation of the electric tensioner, the upper hook assembly 1 mainly bears the load from the lifting or tensioning object, while the tensioner body bears the power load of the chain 2 drive, the reducer 4 transmission, etc. The separate design can avoid excessive concentration of force and reduce the risk of equipment failure or excessive wear. As a medium connecting the upper hook assembly 1 and the tensioner body, the chain 2 reasonably distributes the force between the various components, making the force of the overall system more uniform and improving the service life and stability of the equipment. The split design of the upper hook assembly 1 and the tensioner body makes installation and disassembly more convenient. When it is necessary to replace parts or adjust the equipment configuration, it is not necessary to disassemble the upper hook assembly 1 and the tensioner body as a whole, and they can be operated separately, reducing the complexity of maintenance. The split design can reduce the overall weight of the equipment, making it easier to transport and move, especially in environments where the work point needs to be frequently changed. Since there is no direct connection, the upper hook assembly 1 can be flexibly hung at different positions according to different task requirements, and the tensioner body can adjust the working state through the chain 2, so it is more adaptable and can cope with different work requirements.

[0042] The upper hook assembly 1 and the tensioner body are designed separately, making the connection between the two more flexible. This means that in different working environments, the positions, angles and operating methods of the two can be adjusted according to actual needs. For example, when lifting heavy objects, the length of the chain 2 or the position of the pulley block can be adjusted as needed, or the use of the equipment can be adjusted in different power line tensioning operations. This structural design is suitable for a variety of operating modes and can effectively improve the adaptability and efficiency of the electric tensioner in different application scenarios.

[0043] In some embodiments, Figure 3 As shown, the limit module includes a passive limit sensor 81 , and the passive limit sensor 81 is arranged at the bottom of the tensioner body, and can be arranged at the chain through hole 41 near the bottom of the reducer 4 .

[0044] Furthermore, if Figure 1 As shown, the lower hook assembly 3 includes a lower hook 31, a lower hook pulley block 32 and a lower hook bracket 33, etc. The lower hook 31 is arranged at the bottom of the lower hook bracket 33 (taking the use scenario of vertically lifting objects as an example), and the lower hook pulley block 32 ( Figure 1 The pulley shaft (actually shown) is rotatably arranged in the lower hook bracket 33 and can rotate freely. Figure 1In the illustrated embodiment, the first end of the chain 2 is fixed to the left side of the lower hook bracket 33, one pulley may be provided in the upper hook pulley block, and one pulley may be provided in the lower hook pulley block 32, that is, the configuration in this embodiment is a three-chain form, which can take into account both load and speed; the product solution in the embodiment of the present invention can carry a load of 9t. In order to achieve a higher load, the pulley block can be configured as more, that is, a four-chain or five-chain form, which can provide a load of 12t, 15t or higher.

[0045] The top of the lower hook bracket 33 has a flat plate portion 331. During the process of tightening or lifting, in the running direction of the chain 2, the range of the flat plate portion 331 can cover the passive limit sensor 81. The coverage mentioned here mainly refers to the passive limit sensor 81 detecting the flat plate portion 331 along the running direction of the chain 2. The plate surface of the flat plate portion 331 should cover the distance of the passive limit sensor 81 relative to the chain 2, so that the passive limit sensor 81 can detect the flat plate portion 331. The passive limit sensor 81 is used to detect whether the actual distance between it and the flat plate portion 331 of the lower hook assembly 3 reaches the set limit distance. This configuration can achieve accurate positioning and upper limit functions during the process of tightening, and effectively prevent excessive lifting or stretching.

[0046] like Figure 1 and Figure 5 As shown, the second end of the chain 2 is provided with an end stopper 21, and the cross-sectional area of ​​the end stopper 21 can be designed to be larger than the chain through hole 41 at the bottom of the reducer 4, so as to limit the maximum operating range of the chain 2. A positioning plate 22 is provided above the end stopper 21, which is integrally or separately provided and penetrates the chain 2. The design of the positioning plate 22 ensures the operating range of the chain 2 and the precise operation of the sensor. Since the chain 2 has no load at the free end (a section between the second end and the chain through hole 41), under the action of gravity, whether it is a tightening scene or a lifting scene, this section of the chain 2 will always maintain a natural drooping posture. During the tightening or lifting process, the posture of the positioning plate 22 is horizontal, and in the vertical direction, the range of the positioning plate 22 can cover the passive limit sensor 81. The passive limit sensor 81 is used to detect whether the actual distance between it and the positioning plate 22 reaches the set limit distance.

[0047] Furthermore, in the case where the chain 2 and the end stopper 21 are separately provided, the top of the end stopper 21 of the chain 2 and the positioning plate 22 both extend in the horizontal direction, and the middle of the positioning plate 22 has a plum blossom hole 221 of the same shape as the chain 2, so that the positioning plate 22 always maintains a horizontal posture during the rising process. The plum blossom hole 221 has a limiting function, optimizes the connection between the positioning plate 22 and the chain 2, and also improves the stability of the entire structure during vertical and horizontal movement.

[0048] The above embodiment not only improves the accuracy and safety of the system, but also enhances the flexibility and reliability of the equipment in the line tightening operation through the reasonably configured limit module, lower hook assembly 3 and end limit block 21. The synergy between the positioning plate 22 and the sensor enables the entire system to accurately control the movement of the chain 2, ensuring safety and efficiency during the line tightening or hoisting operation.

[0049] In some embodiments, the passive limit sensor 81 includes any one of a laser range finder, an ultrasonic range finder, a photoelectric sensor, a Hall effect sensor, and an inductive range finder. Each of these sensor types has different working principles and advantages and disadvantages, and the most suitable sensor can be selected according to specific application requirements. The laser range finder calculates the distance to the object by emitting a laser beam and measuring its return time; the sensor has the advantages of high precision and long-distance measurement. The ultrasonic sensor calculates the distance to the object by emitting an ultrasonic wave and receiving its reflected wave. Its advantages include low cost, moderate measurement range, low requirements on the surface of the object, and good performance in harsh environments. The photoelectric sensor determines the position of the object by emitting a light beam and detecting the reflected light. Its advantages include fast response speed, high precision, easy installation, and good detection effect on transparent objects. The Hall effect sensor detects the position or distance of the object by sensing the change of the magnetic field of the object. It has high reliability and durability, strong anti-interference ability, and is not easily affected by environmental factors. The inductive sensor detects the proximity or position of the metal object through the principle of electromagnetic induction. It has a simple structure, fast response speed, and high sensitivity to metal objects. By using one or more of laser, ultrasonic, photoelectric, Hall effect and inductive ranging sensors, you can flexibly select the appropriate sensor for limit detection according to actual work requirements.

[0050] In some embodiments, the passive limit sensor 81 includes a limit distance adjustment member for adjusting the limit distance; the limit distance range of the limit module is configured to be 2 to 10 mm. The operator can accurately set the working range of the mechanical parts according to actual needs to ensure that the equipment can move within the ideal range. Especially in limited space or applications with strict limit requirements, this adjustment function can effectively avoid misoperation or collision. For example, when the passive limit sensor 81 uses a laser sensor, the limit distance adjustment member can use an adjustment screw.

[0051] In some embodiments, the limit module further includes an active limit unit, which is used to obtain the height position of the first end and / or the second end of the chain 2 in real time, and when the height position reaches the limit distance, the drive assembly 5 is configured to stop running after the actual distance reaches the set limit distance. The active limit unit is used to obtain the height position of the first end and / or the second end of the chain 2 by monitoring the rotation direction and number of turns of the sprocket or the rotation direction and number of turns of the drive assembly 5, combined with the total length of the chain 2. This method mainly monitors the structure of the rotating parts of the non-chain 2, calculates the rotation length of the chain 2 through a program, and thus obtains the real-time position of the two ends of the chain 2, thereby realizing real-time height monitoring. In this embodiment, the active limit unit calculates the height position of the end point of the chain 2 by real-time monitoring the rotation direction and number of turns of the sprocket or the drive assembly 5, combined with the total length of the chain 2, to ensure that the operation of the drive assembly 5 is automatically stopped when the set limit distance is reached. This method effectively avoids damage caused by excessive movement of the chain 2 and can accurately control the operation of the system.

[0052] In some embodiments, the combination of active limit units and passive limit sensors 81 can significantly improve the accuracy, reliability and flexibility of the system. The active limit unit can dynamically adjust and predict the position of the chain 2 by monitoring the motion state of the chain 2 in real time (such as the number of rotations and direction of the sprocket) and calculating the height position of the end point in combination with the total length of the chain 2. This method is usually more flexible and accurate than traditional passive sensors, especially in high-speed or complex motion situations. Passive limit sensors 81 (such as physical limit switches, photoelectric sensors, laser sensors, etc.) provide feedback when the end point position reaches the preset physical limit. Due to its simple structure and low cost, passive sensors can be used as backup or supplement to enhance the system's ability to respond to abnormal situations. The active limit unit relies on calculations and algorithms to infer the position, so it may be affected by the external environment (such as temperature, humidity, electromagnetic interference, etc.) or system errors. By introducing passive limit sensors 81, a redundant data source can be provided. Once the active limit unit fails or errors occur, the passive sensor can still serve as the final protection mechanism to ensure system safety. The passive limit sensor 81 does not rely on calculations, but directly monitors the physical position, with high reliability, and can be used as the "last line of defense" of the active limit system. The active limit unit can track and predict the running status of the chain 2 in real time, and actively stop the drive component 5 when approaching the limit, thereby effectively preventing the chain 2 from moving excessively. The passive limit sensor 81 provides a physical "hard limit", which can ensure that the system will not continue to move when the active limit unit fails to respond in time, avoiding excessive stretching or damage to the chain 2 and related mechanical parts. The active limit unit can effectively reduce damage caused by measurement errors or system failures. By combining the passive limit sensor 81, the system can avoid further damage through physical limits when an abnormality or calculation error occurs. The passive limit sensor 81 has a simple working principle and low cost, so while achieving efficient limit protection, it reduces the overall maintenance cost of the system. The combined use of the active limit unit and the passive limit sensor 81 has significant advantages in improving system accuracy, reliability, safety, flexibility, etc. The active limit unit provides real-time and precise dynamic control, which can cope with complex and high-speed working scenes; while the passive limit sensor 81 provides simple and reliable hard protection, ensuring that the system can operate normally and safely under various circumstances. The coordinated use of the two realizes redundant protection, real-time monitoring, early warning capability and system intelligence, and improves the stability and service life of the overall system.

[0053] In some embodiments, the electric tightening device further includes a power supply component 6, such as Figure 2 and Figure 3As shown, the power supply component 6 and the drive component 5 are respectively arranged on both sides of the tensioner body. This arrangement can effectively optimize the spatial layout, avoid excessive crowding, and improve the heat dissipation performance. The power supply component 6 and the drive component 5 are independently arranged, which helps to improve the stability and maintainability of the system. The power supply component 6 includes a battery, a battery charging module and a mains power supply module; wherein the battery is used to provide power to the drive component 5, the battery charging module is used to charge the power of the energy replenishing battery or the mains into the battery, and the mains power supply module is used to directly connect the drive component 5 to the mains. Optionally, the battery charging module can use the charging interface 61 for energy replenishment; the mains power supply module can use the mains interface 62 for energy replenishment.

[0054] In the above embodiment, the battery plays the role of energy storage and power supply in the electric tensioning device, and is suitable for field operations in the power industry. In order to improve more capabilities, the battery can be selected from lithium iron phosphate or ternary lithium batteries. The battery charging module is responsible for converting and storing the external power source (such as mains or energy replenishment battery) into the battery, ensuring that the battery has enough power to supply the drive component 5 when needed, and can also manage the battery to avoid problems such as overcharging or over-discharging. When the battery is insufficient, the charging module can transfer the power in the mains power supply module or the energy replenishment battery to the battery for charging. The charging module can also have an intelligent management function to ensure that the charging process is efficient and safe. In some occasions, the battery charging module can be charged by other forms of energy replenishment batteries (such as portable batteries) to increase the working flexibility and endurance of the equipment. The function of the mains power supply module is to directly connect the mains to the drive component 5 to ensure that the drive component 5 can work stably in an environment where the mains is available. This can be used to provide a continuous, battery-free power supply, which is particularly suitable for long-term operation occasions to avoid equipment shutdown due to battery exhaustion. The AC power supply module provides higher power stability and continuity when the AC power supply is stable. It does not rely on the battery power and is suitable for long-term, high-power operation.

[0055] In the above embodiment, the combination of the battery, the battery charging module and the mains power supply module ensures that the electric tensioning device can operate stably in a variety of working environments. Through the intelligent charging and power management mechanism, the system can efficiently and safely utilize power resources, taking into account flexibility, endurance and stability. This power supply method not only increases the autonomy of the device, but also improves the reliability and adaptability of the system.

[0056] In some embodiments, Figure 4As shown, the driving assembly 5 includes a motor 51, a gear set and a driving assembly bracket 54, and the gear set includes a driving gear 52 and a driven gear 53. The motor 51 is the core of the driving assembly 5, and is responsible for converting electrical energy into mechanical energy, thereby driving the operation of the gear set. The motor 51 provides power to the gear set through its output shaft. The motor 51 is fixed to one side of the reducer 4 through the driving assembly bracket 54. This design enables the motor 51 to be firmly matched with other components and reduce errors caused by vibration or operation. When the driving gear 52 rotates, the driven gear 53 will also rotate accordingly, thereby transmitting power to the reducer 4, further reducing the rotation speed and increasing the output torque.

[0057] Furthermore, the motor 51 is fixedly arranged on one side of the reducer 4 through the drive assembly bracket 54, and the drive assembly bracket 54 is used to fix the motor 51 and the reducer 4, so that the entire drive assembly 5 remains stable and prevents the components from being displaced due to vibration or load changes. The driving gear 52 is mounted on the output shaft of the motor 51, and the driven gear 53 is mounted on the input main shaft of the reducer 4, and the driving gear 52 is meshed with the driven gear 53; the housing of the reducer 4 is provided with a bearing mounting frame 55 on the side facing the motor 51, and the end of the output shaft of the motor 51 (or the rotating shaft 511 connected to it through a coupling) is mounted in the bearing mounting frame 55 through a bearing 56. The function of this structure is to provide support for the output shaft of the motor 51. The bearing mounting frame 55 supports the output shaft or the rotating shaft 511 of the motor 51 through the bearing 56, reduces friction and wear, and improves the stability and accuracy of operation. In addition, the design ensures that the drive assembly 5 is relatively compact in size through careful arrangement, which is easy to integrate into the equipment and saves space.

[0058] In existing tensioners, the motor output shaft is usually suspended, that is, one end of the output shaft is not fully supported. This design may cause the motor output shaft to have unstable phenomena such as sway and jump under high speed and high torque working conditions, thereby affecting the precise meshing between the motor and the driven gear. The suspended motor output shaft may also cause vibration, increased noise, and wear during long-term operation, ultimately reducing the stability of the system and shortening its life.

[0059] Compared with the structure in which the motor output shaft in the existing tensioner is suspended, the motor output shaft or rotating shaft in the embodiment of the present invention is supported by a bidirectional positioning bearing, thereby ensuring that the motor 51 can stably cooperate with the driven gear 53 under high-speed and high-torque working scenarios without the occurrence of sway and jump. The support of the bidirectional positioning bearing makes the meshing of the motor output shaft or rotating shaft 511 with the driven gear 53 more precise, reducing the poor gear meshing, noise and wear caused by the offset or misalignment of the motor output shaft or rotating shaft, thereby improving the transmission efficiency and the smooth operation of the system. Since the bidirectional positioning bearing effectively reduces the axial and radial instability of the motor output shaft, the friction and wear between the motor output shaft and other transmission components are controlled, thereby extending the service life of the equipment.

[0060] In some embodiments, the side of the driven gear 53 facing or away from the reducer 4 is a braking surface. This method closely integrates the braking function with the transmission system, that is, when braking is required, the brake pad in the reducer 4 or the driving component 5 cooperates with the braking surface of the driven gear 53 to achieve a fast and effective braking effect. This design avoids the need to install an additional independent braking system, thereby simplifying the overall structure, reducing the number of components, and improving the compactness of the system.

[0061] Furthermore, a braking structure for cooperating with a brake pad of the electric tensioning device is provided on the braking surface. The brake pad can be a component that contacts the braking surface and generates friction, and slows down or stops the rotation of the driven gear 53 by friction. This cooperation can provide precise braking control, especially when emergency parking or stopping the transmission, it can respond quickly. The design of the braking structure can ensure appropriate friction to achieve smooth and reliable braking. Integrating the braking structure directly into the design of the driven gear 53 helps to reduce additional space and component installation, and improve space utilization.

[0062] In the above embodiments, the control structure of the brake pad can select the solutions in the prior art, such as spring-loaded brake system, electromagnetic brake, hydraulic brake, etc., to apply braking force to the brake pad to ensure that the device can stop quickly and stably when the motor stops or fails, and avoid sliding or uncontrolled movement of the load or device. These structures can achieve fast response and efficient braking, and ensure the safety and reliability of the device.

[0063] As at least one achievable method, the electric tensioning device further includes an electromagnetic clutch brake, and the motor 51 is a DC reduction motor, which can achieve precise control. The electromagnetic clutch brake is connected to the output shaft in the DC reduction motor, and is used to provide braking force to the output shaft of the DC reduction motor. Specifically, the electromagnetic clutch brake can be arranged above the output shaft or on one side through the output shaft of the brake motor 51, so that the braking force is converted into the reverse transmission resistance of the gear set and the reduction box, so that it can react and brake faster when rising or falling, and achieve the start-stop braking effect and control synchronization. In other words, when the motor 51 rotates, the electromagnetic brake can provide instant reverse torque, help to quickly stop the movement of the motor, and play a role in rapid start-stop. Compared with traditional mechanical braking methods, the electromagnetic clutch brake can reduce friction and wear, and improve the long-term reliability and durability of the system. The DC motor has good speed regulation performance, and combined with the use of the electromagnetic clutch brake, it can achieve fine motion control, which is very effective when precise tension control is required in the electric tensioning device.

[0064] Furthermore, the electromagnetic clutch brake, as a braking structure of the motor output shaft, combined with the brake pad of the traditional mechanical braking method in the reducer 4, can realize the instant stop function. The electromagnetic clutch can also quickly stop the motor rotation by disconnecting the connection between the motor and the load; while the traditional mechanical brake pad further ensures the accurate and rapid stop of the load through friction. This dual braking method can greatly improve the stopping accuracy and safety of the equipment, and is suitable for mechanical equipment and automation systems with extremely high stopping accuracy requirements.

[0065] In some embodiments, Figure 2 and Figure 3As shown, the drive assembly 5 also includes a motor cover 57 and a cooling fan. The cooling fan is arranged on one side of the motor 51. The motor cover 57 is provided with a transparent cooling slot 571 in the airflow direction of the cooling fan; the motor cover 57 is mainly used to protect the components inside the motor 51, prevent external objects from damaging the motor 51, and prevent dust, liquid and other foreign substances from entering the motor 51, thereby ensuring the normal operation of the motor 51. The motor cover 57 is provided with transparent cooling slots 571, and the design of these cooling slots 571 enables the motor cover 57 to dissipate heat effectively. Through the permeability of the cooling slots 571, hot air can be released from the inside of the motor cover 57, which helps to keep the working temperature of the motor 51 within a safe range and prevent overheating. The cooling fan is installed on one side of the motor 51, responsible for taking away the heat generated during the operation of the motor 51, ensuring that the motor 51 will not fail due to excessive temperature. The forced airflow of the fan can accelerate the air flow, thereby improving the heat dissipation efficiency. The airflow direction of the cooling fan is very critical, and its design should be matched with the heat dissipation slots 571 on the motor cover 57, so that the airflow can flow smoothly and take away the hot air, thereby improving the heat dissipation effect. This design helps to improve the working efficiency of the motor 51 and extend the service life of the motor 51.

[0066] In some embodiments, the drive assembly 5 further includes a motor overload alarm 58. The motor overload alarm 58 is used to monitor the working state of the motor 51 in real time. When the load of the motor 51 exceeds the set safety threshold, the alarm will issue a warning to remind the operator to take measures to prevent damage to the motor 51. The motor overload alarm 58 can determine whether it is in an overload state by sensing the current, voltage or temperature of the motor 51. When the current is too high or the temperature of the motor 51 is too high, the alarm will trigger and emit a sound or other form of signal to prompt the operator to immediately stop the operation of the motor 51 or take other protective measures. The motor overload alarm 58 can prevent the motor 51 from running for a long time under high load conditions, avoid damage to the motor 51 due to overload, and reduce maintenance costs and equipment downtime. Optionally, the motor 51 overload alarm can use a sound and light combination alarm method of an alarm light and a buzzer, but is not limited to this, and other methods can also be used, such as remote reminders.

[0067] Optionally, the drive assembly 5 further includes a tension adjustment module, which is used to adjust the load current and power of the motor 51 based on the tension value requirement of the load, so as to adjust the initial tension or final tension of the load. The electric tensioning device in the embodiment of the present invention has an adjustable tension function. When the tensioning device acts on the load, the load (such as a cable) usually has a tension requirement; especially during the tensioning process, if the tension is too large, the cable may be damaged or easily broken. This device can use a programming module or other means to debug the output tension of the device, and automatically alarm and stop working when the threshold is reached, so as to ensure that the cable can accurately reach the preset tension value.

[0068] In the above embodiment, the change of the load current and power of the motor directly affects the tension applied to the load, thereby ensuring that the cable is tightened to a predetermined safe tension value. The device can not only control the initial tension of the load, but also adjust the tension in real time during the entire operation process, ensuring that the cable is always kept within a safe range during the tensioning process to avoid excessive stretching. The tension adjustment module can monitor the tension value of the load and feed it back to the control system to adjust the speed of the motor according to the change of the load. For example, the greater the load current of the motor, the greater its power and the greater the tension it applies. By accurately adjusting the load current and power of the motor, it can be ensured that the load cable always maintains appropriate tension. In order to avoid the cable being damaged by excessive tension. The programming module allows the user to preset a maximum safe tension value, and this maximum safe tension value corresponds to a preset load current value or power value. When the device reaches or exceeds this preset value during operation, the system will automatically trigger an alarm and stop working. Once the tension reaches the set threshold, the device will automatically stop operating. This mechanism can prevent the device from over-stretching the load cable, ensuring the safety of the device and the integrity of the load. At this time, the operator can adjust or maintain the device according to the alarm information.

[0069] In some embodiments, Figure 2As shown, the electric tightening device also includes a display module 59, which can be used to display multiple operating status indicators of the electric tightening device, such as remaining power, real-time current, real-time voltage and real-time power. These real-time data can intuitively feedback the working status of the equipment, help operators to find abnormal conditions in time, and ensure the safe and stable operation of the equipment. The display module 59 can be set on the housing of the device, or on the writing device, or on the cloud. The electric tightening device can also have Bluetooth and LORA remote sharing functions, which enables the device to share its working status data (such as remaining power, real-time current, voltage, power, etc.) to a remote device or monitoring platform through wireless communication technology (such as Bluetooth, LORA, etc.). This not only facilitates the remote monitoring of the device by the local operator, but also transmits the data to the cloud for storage, analysis and management. Further, Bluetooth is suitable for short-range wireless communication, and can be connected to the electric tightening device through a smart phone or tablet computer to realize data reading and equipment management. LORA is suitable for long-distance, low-power wireless communication, and can be used for real-time monitoring of the device status in a large range (such as an area far away from the central control system); LORA can ensure that the working data of the device can be continuously obtained in a remote environment.

[0070] In the above embodiments, by combining the display module, the power and working status display module and the remote data sharing technology (Bluetooth, LORA), the electric tightening device can monitor and display the key electrical status parameters of the equipment in real time, such as the remaining power, real-time current, voltage and power, etc. The device can not only display this information locally, but also share the data remotely through wireless communication technology, supporting the remote management, fault diagnosis and early warning notification of the equipment. This design makes the use of the equipment more intelligent and convenient, and effectively improves the efficiency and safety of equipment management. In some embodiments, such as Figure 2 As shown, the device may have a built-in display screen 59, which can display the power consumption status in real time and provide information on the remaining power. This is crucial for long-term use or when there is no fixed power supply. The operator can determine whether the battery needs to be charged or replaced based on the power information.

[0071] In some embodiments, the electric tensioning device includes a circuit board and at least one of a wired control module and a wireless control module. The wired control module is connected to the circuit board through a wire, the wireless control module includes a wireless signal receiver and a wireless signal transmitter, and both the wired control module and the wireless control module include buttons for controlling the rise, fall, acceleration, deceleration, and switch. The wired control module provides a traditional and stable control method for the device, which has the advantages of strong anti-interference ability and stable response. The wireless control module can use wireless communication technology (such as RF technology, Wi-Fi, Bluetooth, etc.) to allow operators to remotely operate the device; this module provides more flexibility and reduces the complexity of wiring. These two control methods can exist at the same time, that is, the operator can choose to use wired or wireless control according to actual needs, or use a combination of the two. Optionally, the wireless control module can use 433 MHz wireless remote control technology, and the control range can reach 100 meters. Within this range, the remote control can stably operate the device without interference. Remote control and manual control can be used independently or in conjunction with each other; that is, in certain operation processes, the operator can quickly switch the control mode to ensure the flexibility and convenience of operation.

[0072] In some embodiments, the electric tightening device also includes an Internet of Things communication module, which is used to send the operating status of the electric tightening device to a portable device or a cloud management platform, and is also used to receive control instructions sent by the portable device or the cloud management platform. This module connects the device to an external portable device or cloud management platform through the Internet of Things technology, and transmits the operating status of the device in real time. For example, the Internet of Things communication module can send the operating data (such as power, speed, load, etc.) of the electric tightening device to the cloud or portable device for remote monitoring, and the operator or manager can check the operating status of the device at any time; the Internet of Things communication module can also receive control instructions sent by remote devices (such as mobile phone APP, computer platform, etc.) to achieve remote operation, further improving the intelligence of the device.

[0073] In some embodiments, the electric tensioning device is equipped with Beidou and GPS global dual positioning functions, and supports real-time location viewing on mobile phones and computers. Combined with the electronic fence area alarm system, it has super-regional alarm and anti-theft functions. These designs greatly enhance the intelligence and safety of the device. The dual positioning function of Beidou and GPS systems provides more accurate positioning services. The combination of the two can provide more stable and accurate location data in different environments, especially when the signal is poor or in remote areas. The complementarity of the dual systems enhances the reliability of positioning. Through Beidou and GPS dual positioning technology, users can view the location of the device in real time through mobile phones or computers. This function is very suitable for managers or operators who need to remotely monitor the electric tensioning device, especially in occasions where the equipment has a wide operating range and requires remote management, such as power line inspection, communication line maintenance, etc. Real-time location information may be stored and managed through a cloud platform, allowing users to view historical tracks and current status at any time, facilitating equipment scheduling, management and maintenance. The electronic fence system allows users to set a virtual fence or boundary on the map and set the device to operate in a specific area. If the device crosses the set fence range, the system will automatically trigger an alarm. If the electric tensioning device exceeds the preset geographical area (such as working range or safety area), the system will immediately send out an alarm through the mobile phone APP, computer terminal or other notification channels (such as SMS, email, etc.). This can effectively prevent the device from moving in unauthorized areas and avoid theft or misoperation of the device.

[0074] In some embodiments, the electric tightening device can also be configured with an overload protection function. Through precise current detection, the electric tightening device can monitor the load condition of the motor 51 in real time. After the current signal is converted from AD analog to digital, it is processed by the MCU to determine whether it is overloaded. In the overload state, the key control of the electric tightening device will be disabled to ensure that the device no longer performs operations that may cause further damage. When the load is reduced to a safe range, the device will automatically resume work and allow the operation to continue, but at this time only the "downward" operation can be performed to prevent the "upward" operation from occurring again in the overload state. The operator is allowed to adjust the overload value through an external programmer and set an appropriate tension limit, thereby customizing the working parameters of the equipment to meet the needs of different working conditions.

[0075] In some embodiments, the electric tensioning device uses H-bridge PWM (pulse width modulation) technology to accurately adjust the rising and falling speeds of the electric tensioning device. The advantage of PWM speed regulation technology is that it can control the speed with higher efficiency and has stronger adaptability to the load of the motor 51.

[0076] The electric tensioning device in the embodiment of the present invention adopts a variety of advanced technologies to improve its intelligence, operational convenience and safety. Through the combination of wired and wireless control modules, Internet of Things communication, overload protection, two-way operation of remote control and manual control, and high-precision current detection and PWM speed regulation functions, the device can not only operate in an efficient and safe environment, but also achieve remote monitoring and management through tools such as mobile phone APP. The intelligence and functional flexibility of the device greatly improve the convenience of operation, while enhancing the safety and adaptability of the device.

[0077] The electric tensioning device in the embodiment of the present invention can not only be used for tensioning and lifting of power cables in the power industry, but also for tensioning operations or lifting in the construction and hoisting industries, such as tensioning and fixing of steel bars and rigging to ensure the stability and safety of the structure. It can also be used for lifting and handling of heavy objects in the logistics and warehousing industries, or in the shipbuilding and marine engineering industries, automated manufacturing and production lines, wind power generation and energy fields and other scenarios. The electric tensioning device provides significant value in a variety of industries through highly integrated control functions (including wired, wireless control, Internet of Things monitoring, overload protection, etc.), especially in improving work efficiency, enhancing safety, reducing operation and maintenance costs and improving user experience. Whether in the construction, hoisting, electricity, logistics, marine engineering, wind power generation and other industries, it can provide users with intelligent, precise, safe and efficient tensioning control solutions to help users complete tasks more efficiently in complex working environments.

[0078] It should be clear that the present invention is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present invention.

[0079] In the present invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with features of other embodiments or replace features of other embodiments.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the embodiments of the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric tensioning device, characterized in that: The electric wire tensioning device comprises an upper hook assembly (1), a chain (2), a lower hook assembly (3), and a wire tensioning device body; the wire tensioning device body comprises a reducer (4), a drive assembly (5), and a limit module; Wherein, the upper hook assembly (1) is used to hook onto a fixing member to serve as a force-bearing structure; The lower hook assembly (3) is used to hook the cable to be tensioned or the object to be lifted; The first end of the chain (2) is fixed to the lower hook assembly (3), the middle portion of the chain (2) is also wound around the pulley block of the upper hook assembly (1), the pulley block of the lower hook assembly (3) and the sprocket of the reducer (4), and the second end of the chain (2) passes through the chain through hole (41) of the reducer (4); The limit module is used to sense the actual distance from the lower hook assembly (3) and / or the second end of the chain (2) to the bottom of the tensioner body or whether a set limit distance has been reached, and the drive assembly (5) is configured to stop running after the actual distance reaches the set limit distance.

2. The electric tensioning device according to claim 1, characterized in that: The limit module comprises a passive limit sensor (81), and the passive limit sensor (81) is arranged at the bottom of the tensioner body; The lower hook assembly (3) comprises a lower hook (31), a lower hook pulley block (32) and a lower hook bracket (33); the lower hook (31) is arranged at the bottom of the lower hook bracket (33); the lower hook pulley block (32) is rotatably arranged in the lower hook bracket (33); the top of the lower hook bracket (33) has a flat plate portion (331); during the process of tightening the line or lifting, in the running direction of the chain (2), the range of the flat plate portion (331) can cover the passive limit sensor (81); the passive limit sensor (81) is used to detect whether the actual distance between it and the flat plate portion (331) of the lower hook assembly (3) reaches a set limit distance; The second end of the chain (2) is provided with an end limit block (21), and an integral or separate positioning plate (22) is provided above the end limit block (21) and is inserted into the chain (2). During the process of tightening the line or lifting, the positioning plate (22) is in a horizontal position, and in the vertical direction, the positioning plate (22) can cover the passive limit sensor (81). The passive limit sensor (81) is used to detect whether the actual distance between the passive limit sensor and the positioning plate (22) reaches a set limit distance. When the chain (2) and the end stop block (21) are separately arranged, the top of the end stop block (21) of the chain (2) and the positioning plate (22) both extend in the horizontal direction, and the middle of the positioning plate (22) has a plum blossom hole (221) of the same shape as the chain (2), so that the positioning plate (22) always maintains a horizontal posture during the rising process.

3. The electric wire tightening device according to claim 2, characterized in that: The passive limit sensor (81) comprises any one of a laser distance measuring sensor, an ultrasonic distance measuring sensor, a photoelectric sensor, a Hall effect sensor and an inductive distance measuring sensor.

4. The electric wire tightening device according to claim 1 or 2, characterized in that: The limit module further comprises an active limit unit, the active limit unit being used to obtain the height position of the first end and / or the second end of the chain (2) in real time, and when the height position reaches the limit distance, the drive component (5) is configured to stop running after the actual distance reaches the set limit distance; The active limit unit is used to obtain the height position of the first end and / or the second end of the chain (2) by monitoring the rotation direction and number of turns of the sprocket or the rotation direction and number of turns of the drive assembly (5) in combination with the total length of the chain (2).

5. The electric tensioning device according to claim 2, characterized in that: The passive limit sensor (81) comprises a limit distance adjustment member for adjusting the limit distance; the limit distance range of the limit module is configured to be 2-10 mm.

6. The electric wire tightening device according to claim 1, characterized in that: The electric wire tightening device further comprises a power supply component (6), wherein the power supply component (6) and the driving component (5) are respectively arranged on two sides of the wire tightening device body; The power supply component (6) comprises a battery, a battery charging module and a mains power supply module; wherein the battery is used to provide power to the drive component (5), the battery charging module is used to charge the power of the energy replenishment battery or the mains into the battery, and the mains power supply module is used to directly connect the drive component (5) to the mains.

7. The electric wire tightening device according to claim 1, characterized in that: The driving assembly (5) comprises a motor (51), a gear set and a driving assembly bracket (54); the gear set comprises a driving gear (52) and a driven gear (53); The motor (51) is fixedly arranged on one side of the reducer (4) via the drive assembly bracket (54); the driving gear (52) is mounted on the output shaft of the motor (51); the driven gear (53) is mounted on the input main shaft of the reducer (4); the driving gear (52) is meshed with the driven gear (53); A bearing mounting frame (55) is provided on the side of the housing of the reducer (4) facing the motor (51), and the end of the output shaft of the motor (51) is mounted in the bearing mounting frame (55) via a bearing (56).

8. The electric wire tightening device according to claim 7, characterized in that: A side surface of the driven gear (53) facing or away from the reducer (4) is a braking surface, and a braking structure for cooperating with a brake pad of the electric tensioning device is provided on the braking surface; The electric wire tightening device further comprises an electromagnetic clutch brake, the motor (51) is a DC reduction motor, and the electromagnetic clutch brake is connected to an output shaft in the DC reduction motor and is used to provide a braking force to the output shaft of the DC reduction motor.

9. The electric wire tightening device according to claim 7, characterized in that: The drive assembly (5) further comprises a motor cover (57) and a cooling fan, wherein the cooling fan is arranged on one side of the motor (51), and the motor cover (57) is provided with a transparent cooling slot (571) in the airflow direction of the cooling fan; The drive assembly (5) further comprises a motor overload alarm (58); The driving component (5) further comprises a tension regulating module, wherein the tension regulating module is used to regulate the load current and power of the motor (51) based on the tension value requirement of the load, so as to adjust the initial tension or final tension of the load.

10. The electric wire tightening device according to claim 1, characterized in that: The electric tightening device further comprises a display module (59) for displaying at least one of remaining power, real-time current, real-time voltage and real-time power; The electric wire tightening device includes a circuit board and at least one of a wired control module and a wireless control module; The wired control module is connected to the circuit board through a wire, the wireless control module includes a wireless signal receiver and a wireless signal transmitter, and both the wired control module and the wireless control module include buttons for controlling ascending, descending, accelerating, decelerating, and switching; The electric tightening device also includes an Internet of Things communication module, which is used to send the operating status of the electric tightening device to a portable device or a cloud management platform, and is also used to receive control instructions sent by the portable device or the cloud management platform.

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