An electric wire tightening device

Abstract

The present invention relates to the field of wire tighteners and provides an electric wire tightening device, which includes an upper hook assembly, a chain, a lower hook assembly, and a wire tightener body; the wire tightener body includes a reducer, a driving assembly, and a limiting module; wherein, the upper hook assembly is used to hook on a fixing member; the first end of the chain is fixed to the lower hook assembly, and the second end of the chain passes through the chain through hole of the reducer; the limiting 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 wire tightener body or whether the set limiting distance is reached, and the driving assembly is configured to stop running after the actual distance reaches the set limiting distance. The present invention can avoid excessive stretching of the chain or equipment damage through the limiting module; the split design of the upper hook assembly and the wire tightener body can reasonably share the forces of different parts, ensure the stable operation of the equipment, and also provide higher flexibility in use; the present invention also provides a variety of control modes and energy replenishment methods, which are applicable to a variety of application scenarios.

Description

Technical Field

[0001] The present invention relates to the technical field of wire tighteners, and particularly to an electric wire tightening device. Background Art

[0002] A wire tightener, also known as a ratchet tightening device, is a tool widely used in the construction of overhead line laying. It is mainly used to tighten and tension wires to ensure that the tension and position of the wires meet the design requirements. During the erection of transmission lines, the wire tightener is not only used to tighten the wires, but also for operations such as adjusting the position of equipment or materials, replacing insulators, installing or removing other equipment, etc. The double-hook wire tightener is a common type among them and plays a key role during the erection of transmission lines. It is usually used in conjunction with other construction equipment to ensure the smooth progress of the tensioning operation during construction.

[0003] Although existing wire tighteners meet the basic construction requirements to a certain extent, they also have some significant drawbacks, which are specifically manifested in the following aspects:

[0004] 1. Single operation mode, time-consuming and laborious: Most wire tighteners on the market currently rely on manual operation; this means that operators need to rely on manual strength to tighten the wires or tension the equipment, and the process is cumbersome and time-consuming; this manual method not only increases the labor intensity but also reduces the work efficiency. Especially during long-term and high-intensity operations, it is easy to cause operation fatigue.

[0005] 2. Limited bearing capacity: Traditional wire tighteners 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-duty wires or debugging equipment, existing wire tighteners may not be able to provide enough force, resulting in difficult operations and even equipment damage or accidents.

[0006] 3. Large equipment weight and huge volume: Traditional wire tighteners are mostly made of metal materials, and the overall equipment is relatively heavy. Especially during high-altitude operations, the weight and volume of the equipment not only increase the difficulty of handling and installation but also pose certain safety hazards to operators. The large and bulky equipment is not easy to carry and use, reducing the flexibility and convenience of construction.

[0007] 4. Inconvenient one-piece hook design: Some wire tighteners adopt a one-piece hook design, which combines the sprocket with the load-bearing hook. Although the original intention of this design is to simplify the structure, it actually brings many inconveniences. First, when operators hook and disassemble the equipment, they cannot flexibly adjust the position of the hook; second, this design usually cannot withstand larger loads, restricting the use range of the wire tightener. Especially in high-intensity construction that requires bearing larger weights, it is easy to have equipment failures due to excessive loads.

[0008] 5. The limit structure is not reasonably designed: The limit structure of the wire tightener is mainly used to control the extreme movement position of the equipment to ensure that the equipment will not be overstretched or shrunk, prevent exceeding the load-bearing range of the equipment, and protect the normal operation of the equipment. However, the limit devices of existing equipment may have problems with improper design, resulting in the failure to effectively stop or halt operation when the chain or ratchet reaches the limit position. For example, the chain may continue to run when it reaches the uppermost or lowermost end, increasing the risk of equipment damage. When the limit position is reached, without sufficient buffering or accurate stopping devices, the chain or other components may be overstretched or overloaded, leading to wear or damage of equipment components and even safety accidents.

[0009] In summary, although the existing wire tighteners can complete the basic tensioning tasks during overhead line construction, problems such as time-consuming, laborious, insufficient bearing capacity, bulky equipment, and inconvenient operation limit their application in high-intensity and high-load construction environments. With the continuous progress of construction technology, the requirements for wire tighteners are also constantly increasing. There is an urgent need to improve and upgrade existing equipment to improve operation efficiency, ensure construction safety, and meet the challenges of different construction requirements. Summary of the Invention

[0010] In view of this, embodiments of the present invention provide an electric wire tightening device to eliminate or improve one or more defects existing in the prior art.

[0011] In some embodiments, the electric wire tightening device includes an upper hook assembly, a chain, a lower hook assembly, and a wire tightener body; the wire tightener body includes a reducer, a drive assembly, and a limit module;

[0012] Among them, the upper hook assembly is used to hook on a fixing member to serve as a stress structure;

[0013] The lower hook assembly is used to hook the cable to be tensioned or the object to be lifted;

[0014] The first end of the chain is fixed to the lower hook assembly, the middle of the chain also winds around the pulley groups of the upper hook assembly and 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;

[0015] 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 wire tightener body or whether the set limit distance is reached, and the drive assembly is configured to stop running after the actual distance reaches the set limit distance.

[0016] In some embodiments, the limit module includes a passive limit sensor, and the passive limit sensor is disposed at the bottom of the wire tightener body;

[0017] The lower hook assembly includes a lower hook, a lower hook pulley set, and a lower hook bracket. The lower hook is disposed at the bottom of the lower hook bracket. The lower hook pulley set is rotatably disposed within the lower hook bracket. The top of the lower hook bracket has a flat plate portion. During the wire 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 it and the flat plate portion of the lower hook assembly reaches the set limit distance.

[0018] A terminal limit block is provided at the second end of the chain. Above the terminal limit block, there is a position measuring plate that is integrally or separately provided and is inserted into the chain. During the wire tightening or lifting process, the posture of the position measuring plate is horizontal, and in the vertical direction, the range of the position measuring plate can cover the passive limit sensor. The passive limit sensor is used to detect whether the actual distance between it and the position measuring plate reaches the set limit distance.

[0019] In the case where the chain is separately provided from the terminal limit block, the top of the chain terminal limit block and the position measuring plate both extend in the horizontal direction. The middle of the position measuring plate has a plum blossom hole with the same shape as the chain, so that the position measuring plate always maintains a horizontal posture during the rising process.

[0020] In some embodiments, the passive limit sensor includes 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.

[0021] In some embodiments, the limit module further includes an active limit unit. The active limit unit is used to obtain the height positions of the first end and / or the second end of the chain in real time. 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.

[0022] The active limit unit is used to calculate the height positions 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, in combination with the total length of the chain.

[0023] In some embodiments, the passive limit sensor includes a limit distance adjusting member for adjusting the limit distance. The limit distance range of the limit module is configured to be 2 - 10 mm.

[0024] In some embodiments, the electric wire tightening device further includes a power supply assembly. The power supply assembly and the drive assembly are respectively disposed on both sides of the wire tightener body.

[0025] 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.

[0026] 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;

[0027] 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;

[0028] 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.

[0029] 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;

[0030] 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.

[0031] 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;

[0032] The drive assembly also includes a motor overload alarm;

[0033] 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.

[0034] 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;

[0035] The electric wire tightening device includes a circuit board and at least one of a wired control module and a wireless control module;

[0036] 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. Both the wired control module and the wireless control module include buttons for controlling up, down, acceleration, deceleration, and switch.

[0037] The electric wire tightening device further includes an Internet of Things communication module, which is used to send the operating status of the electric wire 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.

[0038] The electric wire tightening device provided by the embodiment of the present invention can avoid excessive stretching of the chain or equipment damage, or prevent overloading or potential safety hazards through the designed limit module; the split design of the upper hook assembly and the wire tightener body of the device can not only reasonably share the stress of different parts to ensure the stable operation of the equipment, but also provide higher flexibility, convenience and safety in use; the device also provides multiple control modes and energy replenishment methods, is applicable to a variety of application scenarios, and has great popularization value and potential.

[0039] The additional advantages, objects, and features of the present invention will be partially described below, and will become partially apparent to those of ordinary skill in the art after studying the following text, or can be learned from the practice of the present invention. The objects and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in the specification and the drawings.

[0040] Those skilled in the art will understand that the objects and advantages that can be achieved by the present invention are not limited to the above specifically described, and the above and other objects that the present invention can achieve will be more clearly understood according to the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and do not limit the present invention. The components in the drawings are not drawn to scale, but are only for showing the principles of the present invention. In order to facilitate showing and describing some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, may become larger relative to other components in the exemplary device actually manufactured according to the present invention. In the drawings:

[0042] Figure 1 It is a schematic structural diagram of an electric wire tightening device in an embodiment of the present invention.

[0043] Figure 2 It is a perspective view of the wire tightener body in one perspective in an embodiment of the present invention.

[0044] Figure 3 It is a perspective view of the wire tightener body in another perspective in an embodiment of the present invention.

[0045] Figure 4 This is a perspective view of the tightener body with the motor cover hidden in an embodiment of the present invention.

[0046] Figure 5 This is a schematic structural view of the second end of the chain in an embodiment of the present invention.

[0047] Reference numerals: 1, upper hook assembly; 2, chain; 21, end limit block; 22, position measuring plate; 221, plum blossom hole; 3, lower hook assembly; 31, lower hook; 32, lower hook pulley group; 33, lower hook bracket; 331, flat part; 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 frame; 56, bearing; 57, motor cover; 571, heat dissipation groove; 58, motor overload alarm; 59, display module; 6, power supply assembly; 61, charging interface; 62, mains interface; 71, wired control interface; 72, wireless signal transmission; 81, passive limit sensor. Detailed implementation manners

[0048] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with the implementation manners and the drawings. Herein, the illustrative implementation manners and descriptions of the present invention are used to explain the present invention, but do not limit the present invention.

[0049] Herein, it also needs to be noted that in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present invention are shown in the drawings, while other details less related to the present invention are omitted.

[0050] It should be emphasized that the term "including / comprising" 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.

[0051] Herein, it also needs to be noted that if not specifically stated, the term "connection" herein can not only refer to direct connection, but also represent indirect connection with an intermediate.

[0052] In the following, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0053] To solve or alleviate the problems existing in the prior art such as time-consuming, laborious, insufficient bearing capacity, bulky equipment, inconvenient operation, etc. in a wire tightener, the present invention provides an electric wire tightening device. The device can avoid excessive stretching of the chain 2 or equipment damage through the designed limit module, or prevent overloading or potential safety hazards; the upper hook assembly 1 and the wire tightener body of the device are designed in a split manner, which can not only reasonably share the stress of different parts to ensure the stable operation of the equipment, but also provide higher flexibility, convenience and safety in use; the device also provides a variety of control modes and energy replenishment methods, is applicable to a variety of application scenarios, and has great promotion value and potential.

[0054] In some embodiments, as Figure 1 shown, the electric wire tightening device includes an upper hook assembly 1, a chain 2, a lower hook assembly 3, a wire tightener body, etc.; the wire tightener body includes a reducer 4, a drive assembly 5, a limit module, etc.

[0055] Among them, the upper hook assembly 1 is used to hook on a fixed part to serve as a stress structure; the lower hook assembly 3 is used to hook the cable to be tensioned or the object to be lifted; the fixed part can be a building structure, equipment, cross arm, overhead electric pole, etc. The function of the upper hook assembly 1 is to provide a stable hanging point to support the entire electric wire tightening device. It can be understood that the electric wire tightening device in the embodiment of the present invention can be used vertically, obliquely or horizontally. For example, in the case of lifting a heavy object, the upper hook assembly 1 needs to be hung above the position where the heavy object to be lifted is to reach. At this time, the chain 2 is arranged in the vertical direction due to the action of gravity; the upper hook assembly 1 can also be hooked on a fixed part (such as a cross arm) on the electric pole, and the lower hook assembly 3 hooks the power cable to be tensioned. In this process, the chain 2 may operate in the horizontal direction or the inclined 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.

[0056] The chain 2 is the main power transmission and load support part in the electric wire tightening device. The first end of the chain 2 is fixed on the lower hook assembly 3, which serves to mount and support the load (such as a lifted object or a power cable). The middle part of the chain 2 also winds around the pulley sets of the upper hook assembly 1, the pulley sets of the lower hook assembly 3 and the sprocket of the reducer 4. The second end of the chain 2 passes out from the chain through-hole 41 of the reducer 4 (refer to Figure 3 ); through this arrangement, the chain 2 can move smoothly to drive the lifting or tensioning of the object to be lifted or the cable to be tensioned.

[0057] The driving component 5 is the power source of the entire electric wire tightening device, driving the reduction gear 4 to work, and then driving the operation of the chain 2. The driving component 5 controls the movement of the chain 2 through the low-speed and high-torque force generated by the reduction gear 4, and pushes the lower hook component 3 to lift or tension an object. The reduction gear 4 converts the high-speed movement provided by the driving component 5 into a low-speed and high-torque output, ensuring that the chain 2 can smoothly drive the load to lift or tension. The reduction gear 4 plays a key role in controlling the power transmission, ensuring the stability and safety of the equipment during the operation process.

[0058] The limiting module is used to sense the actual distance from the second end of the lower hook component 3 and / or the chain 2 to the bottom of the wire tightener body, or whether it reaches the set limiting distance. The driving component 5 is configured to stop operating after the actual distance reaches the set limiting distance. The limiting module monitors the operating states of the chain 2 and the lower hook component 3 through the sensed distance or position sensor. Once it detects that the second end of the chain 2 approaches the bottom of the wire tightener body and reaches the set limit, the limiting module will control the driving component 5 to stop operating, thereby avoiding excessive stretching of the chain 2 or equipment damage, or preventing overloading or potential safety hazards.

[0059] In the above embodiment, the electric wire tightening device in the present invention, through a series of precise designs, combines the upper hook component 1, the chain 2, the lower hook component 3, and the reduction gear 4, the driving component 5 and the limiting module in the wire tightener body, and can effectively lift heavy objects or tension power cables under various operating conditions. The introduction of the limiting module further improves the safety. Through the automatic stop function, it avoids excessive stretching of the chain 2 or overloading of the equipment, ensuring the efficiency and safety of the operation process. This device is applicable to different working environments and can be used vertically, horizontally or obliquely to meet diverse operation requirements.

[0060] In the above embodiment, there is no direct connection relationship between the upper hook component 1 and the wire tightener body, such as Figure 1As shown, they are only separated by the chain 2. This structural design can not only reasonably distribute the forces on different parts to ensure the stable operation of the equipment, but also provide higher flexibility, convenience and safety in use. The upper hook assembly 1 and the wire tightener body are separately arranged, which can effectively distribute various forces during the operation of the equipment. During the operation of the electric wire tightening device, the upper hook assembly 1 mainly bears the load from lifting or tensioning an object, while the wire tightener body bears the power loads such as the drive of the chain 2 and the transmission of the reducer 4. The separate design can avoid excessive concentration of forces and reduce the risk of equipment failure or excessive wear. The chain 2, as a medium connecting the upper hook assembly 1 and the wire tightener body, reasonably distributes the forces among various components, making the force on the overall system more uniform, and improving the service life and stability of the equipment. The separate design of the upper hook assembly 1 and the wire tightener body makes the installation and disassembly more convenient. When replacing parts or adjusting the equipment configuration, it is not necessary to disassemble the upper hook assembly 1 and the wire tightener body integrally, and they can be operated separately, reducing the complexity of maintenance. Through the separate design, the overall weight of the equipment can be reduced, which is convenient for transportation and movement, especially in an environment where the working points need to be frequently changed. Due to the lack of direct connection, the upper hook assembly 1 can be flexibly hooked at different positions according to different task requirements, while the wire tightener body can adjust its working state through the chain 2. Therefore, it has stronger adaptability and can cope with different operation requirements.

[0061] The separate design of the upper hook assembly 1 and the wire tightener body makes the connection method between them more flexible. This means that in different working environments, the positions, angles and operation 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 method of the equipment can be adjusted during different power line tensioning operations. This structural design is applicable to various operation modes and can effectively improve the adaptability and efficiency of the electric wire tightening device in different application scenarios.

[0062] In some embodiments, as Figure 3 shown, the limit module includes a passive limit sensor 81, and the passive limit sensor 81 is arranged at the bottom of the wire tightener body and can be arranged at the position of the chain through-hole 41 near the bottom of the reducer 4.

[0063] Furthermore, as Figure 1 shown, the lower hook assembly 3 includes a lower hook 31, a lower hook pulley group 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 an object as an example), and the lower hook pulley group 32 ( Figure 1 actually the pulley shaft as 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 can be provided in the upper hook pulley set, and one pulley can be provided in the lower hook pulley set 32. That is, in this embodiment, it is configured in a three-chain form, which can balance the load and speed. The product solution in the embodiment of the present invention can carry a load of 9t. For example, in order to achieve a higher load, more pulleys can be configured in the pulley set, that is, in a four-chain or five-chain form, which can provide a load of 12t, 15t or higher.

[0064] The top of the lower hook bracket 33 has a flat plate portion 331. During the wire tightening or lifting process, in the running direction of the chain 2, the range of the flat plate portion 331 can cover the passive limit sensor 81. Here, the so-called covering mainly means that the passive limit sensor 81 detects 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 function during the wire tightening process, effectively preventing over-lifting or stretching.

[0065] As Figure 1 and Figure 5 As shown, a terminal limit block 21 is provided at the second end of the chain 2. The cross-sectional area of the terminal limit block 21 can be designed to be larger than the chain through hole 41 at the bottom of the reducer 4, which is used to limit the maximum running range of the chain 2. Above the terminal limit block 21, a measuring plate 22 integrally or separately provided and inserted into the chain 2 is provided. The design of the measuring plate 22 ensures the running range of the chain 2 and the precise operation of the sensor. Since the chain 2 is unloaded at the free end (a section between the second end and the chain through hole 41), under the action of gravity, in both the wire tightening scenario and the lifting scenario, this section of the chain 2 will always maintain a natural hanging posture. During the wire tightening or lifting process, the posture of the measuring plate 22 is horizontal, and in the vertical direction, the range of the measuring 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 measuring plate 22 reaches the set limit distance.

[0066] Further, in the case where the chain 2 is separately provided from the terminal limit block 21, the top of the terminal limit block 21 of the chain 2 and the measuring plate 22 both extend in the horizontal direction. The middle of the measuring plate 22 has a plum blossom hole 221 with the same shape as the chain 2, so that the measuring plate 22 always maintains a horizontal posture during the rising process. The plum blossom hole 221 has a limiting effect, optimizes the connection between the measuring plate 22 and the chain 2, and also improves the stability of the entire structure during vertical and horizontal movement.

[0067] In the above embodiments, by reasonably configuring the limit module, the lower hook assembly 3 and the end limit block 21, not only the accuracy and safety of the system are improved, but also the flexibility and reliability of the equipment in the tight wire operation are enhanced. The cooperative action of the position measuring plate 22 and the sensor enables the entire system to accurately control the movement of the chain 2, ensuring safety and efficiency during the tight wire or hoisting operation.

[0068] In some embodiments, the passive limit sensor 81 includes any one of a laser range finder sensor, an ultrasonic range finder sensor, a photoelectric sensor, a Hall effect sensor, and an inductive range finder sensor. These types of sensors each have different working principles, advantages, and disadvantages, and the most suitable sensor can be selected according to specific application requirements. The laser range finder sensor calculates the distance to an object by emitting a laser beam and measuring its return time; this sensor has the advantages of high precision and long-distance measurement. The ultrasonic sensor calculates the distance to an object by emitting ultrasonic waves and receiving their reflected waves, and its advantages include lower cost, moderate measurement range, low requirements for the object surface, and good performance in harsh environments. The photoelectric sensor determines the position of an object by emitting a light beam and detecting the reflected light, and 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 an object by sensing the magnetic field change of the object, and 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 a metal object through the principle of electromagnetic induction, and it has a simple structure, fast response speed, and high sensitivity to metal objects. By using one or several of the laser, ultrasonic, photoelectric, Hall effect, and inductive range finder sensors, the appropriate sensor for limit detection can be flexibly selected according to the actual working requirements.

[0069] In some embodiments, the passive limit sensor 81 includes a limit distance adjusting 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 components according to actual needs to ensure that the equipment can move within an ideal range. Especially in limited spaces or applications with strict limit requirements, this adjustment function can effectively avoid misoperations or collisions. For example, when the passive limit sensor 81 selects a laser sensor, the limit distance adjusting member can use an adjusting screw.

[0070] In some embodiments, the limit module further includes an active limit unit configured to obtain in real time the height position of the first end and / or the second end of the chain 2. When the height position reaches the limit distance, the drive assembly 5 is configured to stop operating after the actual distance reaches the set limit distance. The active limit unit is configured to calculate 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 and combining with the total length of the chain 2. This method mainly monitors the structure of the rotating components other than the chain 2, calculates the rotating length of the chain 2 through a program, so as to obtain the real-time positions of both ends of the chain 2 and realize real-time height monitoring. In this embodiment, the active limit unit calculates the height position of the endpoints of the chain 2 by monitoring in real time the rotation direction and number of turns of the sprocket or the drive assembly 5 and combining with the total length of the chain 2, ensuring that the drive assembly 5 automatically stops operating 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.

[0071] In some embodiments, the combined use of the active limit unit and the passive limit sensor 81 can significantly improve the accuracy, reliability, and flexibility of the system. The active limit unit calculates the height position of the end point by real-time monitoring the motion state of the chain 2 (such as the number of rotations and direction of the sprocket) and combining it with the total length of the chain 2, and can dynamically adjust and predict the position of the chain 2. This method is usually more flexible and accurate than traditional passive sensors, especially in high-speed or complex motion situations. The passive limit sensor 81 (such as a physical limit switch, an optoelectronic sensor, a laser sensor, etc.) provides feedback when the end point position reaches a preset physical limit. Due to its simple structure and low cost, the passive sensor can be used as a backup or supplement to enhance the system's ability to handle abnormal situations. The active limit unit depends 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 the passive limit sensor 81, redundant data sources can be provided. Once the active limit unit fails or has an error, 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" for the active limit system. The active limit unit can track and predict the operating state of the chain 2 in real time, and actively stop the drive assembly 5 when approaching the limit, thus effectively preventing the chain 2 from over-moving. The passive limit sensor 81 provides a physical "hard limit". In the case where the active limit unit fails to respond in time, it can still ensure that the system does not continue to move, avoiding over-stretching or damaging 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, when an abnormality or calculation error occurs in the system, further damage can be avoided through physical limits. The working principle of the passive limit sensor 81 is simple and the cost is low, so while achieving efficient limit protection, the overall maintenance cost of the system is reduced. 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 accurate dynamic control and can handle complex and high-speed working scenarios; while the passive limit sensor 81 provides simple and reliable hard protection to ensure that the system can operate normally and safely under various circumstances. The combined use of the two achieves redundant protection, real-time monitoring, early warning capabilities, and system intelligence, improving the stability and service life of the overall system.

[0072] In some embodiments, the electric wire tightening device further includes a power supply assembly 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 wire tightener body. This arrangement can effectively optimize the spatial layout, avoid overcrowding, and improve the heat dissipation performance at the same time. The power supply component 6 and the drive component 5 are independently arranged respectively, which helps to improve the stability and maintainability of the system. The power supply component 6 includes a storage battery, a storage battery charging module, and a mains power supply module; wherein, the storage battery is used to supply power to the drive component 5, the storage battery charging module is used to charge the power of the replenishment battery or the mains power into the storage battery, and the mains power supply module is used to directly connect the drive component 5 to the mains power. Optionally, the storage battery charging module can use the charging interface 61 for replenishment; the mains power supply module can use the mains power interface 62 for replenishment.

[0073] In the above embodiment, the storage battery plays the role of energy storage and power supply in the electric wire tightener, and is suitable for field operations in the power industry. To improve more capabilities, the storage battery can be selected from lithium iron phosphate or ternary lithium batteries, etc. The storage battery charging module is responsible for converting and storing the external power source (such as mains power or replenishment battery) into the storage battery, ensuring that the storage battery has sufficient power supply for the drive component 5 when needed, and can also manage the storage battery to avoid problems such as overcharging or over-discharging. When the power of the storage battery is insufficient, the charging module can transmit the power in the mains power supply module or the replenishment battery to the storage battery for charging. The charging module can also have an intelligent management function to ensure the charging process is efficient and safe. In some cases, the storage battery charging module can be charged by other forms of replenishment batteries (such as portable batteries), increasing the working flexibility and endurance of the equipment. The function of the mains power supply module is to directly connect the mains power to the drive component 5, ensuring that the drive component 5 can work stably in an environment where the mains power is available. This can be used to provide continuous power supply without relying on batteries, especially suitable for long-term operation occasions, avoiding equipment downtime caused by battery depletion. The mains power supply module provides higher power stability and continuity under stable mains power supply, without relying on the power of the storage battery, and is suitable for long-term and high-power operation.

[0074] In the above embodiment, through the combination of the storage battery, the storage battery charging module, and the mains power supply module, it is ensured that the electric wire tightener 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 equipment, but also improves the reliability and adaptability of the system.

[0075] In some embodiments, such as 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] As at least one implementable mode, the electric wire tightening device further includes an electromagnetic clutch brake. The motor 51 is a DC reduction motor, and a DC motor 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 or on one side of the output shaft to brake the output shaft of the motor 51, so that the braking force is converted into the reverse transmission resistance of the gear set and the reduction box, enabling a faster response and braking during ascending or descending, achieving the start-stop braking effect and control synchronization. In other words, when the motor 51 rotates, the electromagnetic brake can provide instant reverse torque to help quickly stop the movement of the motor, playing a role in rapid start-stop. Compared with the traditional mechanical braking method, the electromagnetic clutch brake can reduce friction and wear, improving the long-term reliability and durability of the system. The DC motor has good speed regulation performance. Combined with the use of the electromagnetic clutch brake, it can achieve fine motion control, which is particularly effective when precise tension control is required in the electric wire tightening device.

[0083] Furthermore, as a braking structure for the motor output shaft, the electromagnetic clutch brake, in combination with the brake pads of the traditional mechanical braking method in the reducer 4, can achieve an immediate 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 pads further ensure the precise and rapid stop of the load through the friction effect. This dual braking method can greatly improve the shutdown precision and safety of the equipment and is applicable to mechanical equipment and automated systems with extremely high requirements for stop precision.

[0084] In some embodiments, such as Figure 2 and Figure 3As shown, the drive assembly 5 further includes a motor cover 57 and a cooling fan. The cooling fan is disposed on one side of the motor 51. The motor cover 57 is provided with a through cooling slot 571 in the air flow direction of the cooling fan. The motor cover 57 is mainly used to protect the components inside the motor 51, prevent damage to the motor 51 by external objects, and at the same time prevent external substances such as dust and liquid from entering the motor 51, ensuring the normal operation of the motor 51. The motor cover 57 is provided with through cooling slots 571, and the design of these cooling slots 571 enables the motor cover 57 to effectively dissipate heat. 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 operating temperature of the motor 51 within a safe range and prevent overheating. The cooling fan is installed on one side of the motor 51 and is responsible for taking away the heat generated during the operation of the motor 51, ensuring that the motor 51 does not malfunction due to excessive temperature. Through the forced air flow of the fan, the air flow can be accelerated, thereby improving the heat dissipation efficiency. The air flow direction of the cooling fan is very crucial, and its design should cooperate with the cooling slots 571 on the motor cover 57 so that the air flow can flow smoothly, taking 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.

[0085] 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 give a warning to remind the operator to take measures to prevent damage to the motor 51. The motor overload alarm 58 can judge 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 be triggered 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 protection measures. The motor overload alarm 58 can prevent the motor 51 from running under high load for a long time, avoid damage to the motor 51 due to overload, and reduce the maintenance cost and equipment downtime. Optionally, the motor 51 overload alarm can adopt an audible and visual combination alarm method of an alarm light and a buzzer, but is not limited thereto, and other methods such as remote reminder can also be used.

[0086] Optionally, the driving component 5 further includes a tension adjustment module, which is configured to adjust the load current and power of the motor 51 based on the required tension value of the load, so as to adjust the initial tension or the final tension on the load. The electric wire tightening device in the embodiment of the present invention has the function of adjustable tension. When the wire tightening device acts on the load, since the load (such as a cable) usually has a requirement for the tightening force; especially during the wire tightening process, if the tension is too large, the cable may be damaged or easily break. 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 value is reached, so as to ensure that the cable can accurately reach the preset tension value.

[0087] In the above embodiment, the changes in the load current and power of the motor directly affect the tension applied to the load, thereby ensuring that the cable is tightened to a predetermined safe tension value. This device can not only control the initial tension of the load, but also adjust the tension in real time during the whole operation process, ensuring that the cable is always within the safe range during the tightening process and avoiding overstretching. The tension adjustment module can monitor the tension value of the load and feedback it to the control system, and 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 precisely adjusting the load current and power of the motor, the load cable can be ensured to always maintain an appropriate tension. In order to avoid damage to the cable due to 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 value, the device will automatically stop operating. This mechanism can prevent the device from overstretching the load cable and ensure 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.

[0088] In some embodiments, such as Figure 2As shown, the electric wire tightening device further includes a display module 59, which can be used to display multiple operating status indicators of the electric wire tightening device, such as remaining power, real-time current, real-time voltage, and real-time power, etc. These real-time data can intuitively reflect the working status of the device, helping operators to detect abnormal situations in a timely manner and ensuring the safe and stable operation of the device. The display module 59 can be set on the housing of the device, or on the writing device, or in the cloud, etc. The electric wire tightening device can also have the functions of Bluetooth and LORA remote sharing. This function enables the device to share its working status data (such as remaining power, real-time current, voltage, power, etc.) to remote devices or monitoring platforms through wireless communication technologies (such as Bluetooth, LORA, etc.). This not only facilitates the local operator's remote monitoring of the device, 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 wire tightening device through a smartphone or tablet to achieve data reading and device management. LORA is suitable for long-range, low-power wireless communication and can be used for real-time monitoring of the device status in a large area (such as an area far from the central control system); LORA can ensure continuous acquisition of the device's working data in a remote environment.

[0089] In the above embodiment, by combining the display module, the power and working status display module, and remote data sharing technologies (Bluetooth, LORA), the electric wire tightening device can monitor and display the key electrical status parameters of the device in real time, such as remaining power, real-time current, voltage, and power, etc. The device can not only display this information locally, but also remotely share the data through wireless communication technology to support remote management, fault diagnosis, and warning notification of the device. This design makes the use of the device more intelligent and convenient, and effectively improves the device management efficiency and safety. In some embodiments, as Figure 2 shown, the device can be built-in with a display screen 59, which can display the power consumption status in real time and provide the remaining power information. This is crucial for usage scenarios with long-term use or no fixed power supply. Operators can judge whether to charge or replace the battery based on the power information.

[0090] In some embodiments, the electric wire tightening device includes a circuit board and at least one of a wired control module and a wireless control module. Among them, 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. Both the wired control module and the wireless control module include buttons for controlling rising, falling, accelerating, decelerating, and switching. The wired control module provides a traditional and stable control method for the device, with the advantages of strong anti-interference ability and stable response. The wireless control module can adopt wireless communication technologies (such as RF technology, Wi-Fi, Bluetooth, etc.), enabling operators to remotely operate the device; this module provides more flexibility and reduces the complexity of wiring. These two control methods can coexist, that is, operators can choose to use wired or wireless control according to actual needs, or use both in combination. Optionally, the wireless control module can adopt 433 MHz wireless remote control technology, and the control range can reach 100 meters. Within this range, the remote controller can stably operate the device without interference. Remote control and manual control can be used independently or in cooperation; that is, during certain operations, operators can quickly switch the control method to ensure the flexibility and convenience of operation.

[0091] In some embodiments, the electric wire tightening device further includes an Internet of Things (IoT) communication module, which is used to send the operating status of the electric wire 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 IoT technology and transmits the operating status of the device in real time. For example, the IoT communication module can send the operating data of the electric wire tightening device (such as power, speed, load, etc.) to the cloud or a portable device for remote monitoring. Operators or managers can view the operating status of the device at any time; the IoT communication module can also receive control instructions sent by remote devices (such as a mobile phone APP, a computer platform, etc.) to achieve remote operation, further improving the intelligence level of the device.

[0092] In some embodiments, the electric wire tightening device is configured with dual positioning functions of Beidou and GPS globally, and supports real-time location viewing on mobile phones and computer terminals. Combined with the electronic fence area alarm system, it has functions of out-of-area alarm and anti-theft. These designs greatly enhance the intelligence and security of the device. The dual positioning functions of the Beidou and GPS systems provide 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 the dual positioning technology of Beidou and GPS, users can view the location of the device in real time through mobile phones or computer terminals. This function is very suitable for managers or operators who need to remotely monitor the electric wire tightening device, especially in occasions where the device operation range is wide and remote management is required, such as power line inspection, communication line maintenance, etc. The real-time location information may be stored and managed through the cloud platform, enabling users to view the historical track and current status at any time, facilitating device 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 within a specific area. If the device crosses the set fence range, the system will automatically trigger an alarm. If the electric wire tightening device exceeds the preset geographical area (such as the working range or safety area), the system will immediately send an alarm through the mobile phone APP, computer terminal, or other notification channels (such as text messages, emails, etc.). This can effectively prevent the device from operating in unauthorized areas and avoid device theft or incorrect operation.

[0093] In some embodiments, the electric wire tightening device can also be configured with an overload protection function. Through precise current detection, the electric wire 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 wire tightening device will be disabled to ensure that the device no longer performs operations that may cause further damage. When the load drops to the safe range, the device will automatically resume operation and allow the operation to continue, but only the "lowering" operation is allowed at this time to prevent the "raising" 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 tensile limit, thereby customizing the working parameters of the device to meet the requirements of different working conditions.

[0094] In some embodiments, the electric wire tightening device adopts H-bridge PWM (pulse width modulation) technology, which can precisely adjust the rising and falling speeds of the electric wire tightening device. The advantage of PWM speed regulation technology is that it can control the speed with high efficiency and has stronger load adaptability to the motor 51.

[0095] The electric wire tightening device in the embodiments of the present invention adopts a variety of advanced technologies to enhance 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, as well as high-precision current detection and PWM speed regulation functions, the device can not only operate in a high-efficiency and safe environment, but also realize remote monitoring and management through tools such as mobile phone APP. The intelligence and functional flexibility of the device greatly improve the operational convenience, while enhancing the safety and adaptability of the device.

[0096] The electric wire tightening device in the embodiments of the present invention can not only be used for the tensioning and lifting of power cables in the power industry, but also for the tightening operation or lifting in the construction and hoisting industries, such as the tensioning and fixing of steel bars and rigging to ensure the stability and safety of the structure. It can also be used for the lifting and handling of heavy objects in the logistics and warehousing industries, or in scenarios such as the ship and offshore engineering industries, automated manufacturing and production lines, wind power generation and energy fields. The electric wire tightening 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 terms of improving work efficiency, enhancing safety, reducing operation and maintenance costs, and improving user experience. Whether in industries such as construction, hoisting, power, logistics, offshore engineering, and wind power generation, it can provide users with intelligent, precise, safe, and efficient tightening control solutions to help users complete tasks more efficiently in complex operating environments.

[0097] It should be clear that the present invention is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, the detailed description of known methods 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. Those skilled in the art can make various changes, modifications, and additions, or change the order between steps after understanding the spirit of the present invention.

[0098] In the present invention, the features described and / or illustrated for one embodiment can be used in the same way or in a similar way in one or more other embodiments, and / or combined with the features of other embodiments or replace the features of other embodiments.

[0099] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within 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 the 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; 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.

2. The electric tensioning device according to claim 1, 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.

3. The electric wire tightening device according to claim 1, 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).

4. The electric tensioning device according to claim 1, 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.

5. 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.

6. 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).

7. The electric wire tightening device according to claim 6, 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.

8. The electric wire tightening device according to claim 6, 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.

9. 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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