Split type electric tightener
Through its split design and efficient power transmission system, the problem of insufficient load-bearing capacity and inconvenient operation of the tensioner has been solved, achieving efficient and safe tensioning operation, which is suitable for power construction and transmission line maintenance.
Patent Information
- Application Number
- CN202520149781.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing wire tensioners have limited load-bearing capacity, are bulky, inconvenient to operate, and time-consuming. They pose safety hazards, especially in high-intensity and high-load operations, and their traditional design limits their applicability.
The device features a split design, separating the electric tensioner body from the hook system. It utilizes a DC motor, gear set, and speed change device for power, and combines a high-strength chain and laser diffuse reflection sensor to achieve efficient and flexible tensioning operation.
It improves work efficiency, reduces operational difficulty, and enhances safety. It is suitable for high-efficiency tensioning and power construction, and performs particularly well in power construction and transmission line maintenance.
Smart Images
Figure CN223797810U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wire tensioner technology, and in particular to a split-type electric wire tensioner. Background Technology
[0002] A wire tensioner is a commonly used tool in overhead power line construction. Its main function is to tighten and tension conductors to ensure that the conductor tension and position meet design specifications. During the construction of power transmission lines, wire tensioners are not only used for conductor tensioning but also for adjusting the position of equipment or materials, such as lifting insulators, installing or dismantling other devices. Double-hook wire tensioners, as a common type, play an important role in power transmission line erection and can be used in conjunction with other construction equipment to ensure the smooth progress of power transmission line construction.
[0003] While existing wire tensioners meet construction needs to some extent, they still suffer from limited load-bearing capacity, bulky size, and inconvenience. Currently, most wire tensioners rely on manual operation, requiring operators to manually tighten the wires or adjust the equipment, a cumbersome and time-consuming process. Especially in long-term and high-intensity work environments, this not only increases labor intensity but also easily leads to operator fatigue, thus reducing work efficiency. Traditional wire tensioners have relatively low load-bearing capacity, unable to meet the demands of heavy-load operations. In some construction scenarios requiring high tension, existing wire tensioners may be insufficient, leading to operational difficulties or even equipment damage or accidents due to excessive load. Most traditional wire tensioners are made of metal, resulting in a bulky overall design. Especially during high-altitude operations, the weight and size of the equipment increase the difficulty of handling and installation, potentially posing safety hazards to operators. The large size and weight of the equipment reduce the flexibility and convenience of the construction process. Some wire tensioners use an integrated hook design, combining the sprocket and load-bearing hook into one unit, intended to simplify the structure, but in reality, this design introduces considerable inconvenience. If the hook position cannot be adjusted flexibly, problems may occur when subjected to large loads, limiting the applicability of the tensioner. Utility Model Content
[0004] In view of this, the present invention provides a split-type electric wire tensioner to eliminate or improve one or more defects existing in the prior art.
[0005] The electric tensioner includes a body and a hook system, the hook system including an upper hook assembly, a chain and a lower hook assembly;
[0006] The main body and the upper hook assembly are separately configured; the upper hook assembly is used to hook onto a fixed object as a force-bearing structure; the lower hook assembly is used to hook onto the target object; the first end of the chain is fixed to the lower hook assembly or the lower hook assembly, the middle part of the chain is wound around the pulley group of the upper hook assembly and the pulley group of the lower hook assembly, and the second end of the chain passes through the sprocket of the main body and then exits;
[0007] The main body includes a power supply component, a DC motor, a gear set, and a speed change device; wherein, the power supply component and the DC motor are disposed on both sides of the speed change device along its main shaft axis; the output shaft of the DC motor is arranged parallel to the main shaft of the speed change device; the gear set includes a driving pinion and a driven gear; the driving pinion is mounted on the output shaft of the DC motor or on a rotating shaft connected to the output shaft; the driven gear is mounted on the input shaft of the speed change device; and the end of the output shaft of the DC motor is supported by a bearing.
[0008] In some embodiments, the transmission device has a transmission device housing, and a bearing bracket is fixedly disposed on one side of the transmission device housing, and the bearing is installed in the bearing bracket.
[0009] In some embodiments, the main body further includes a motor housing, which is connected to the transmission device housing via a motor bracket, and the DC motor is fixedly connected to the motor bracket, which has a plate-like structure.
[0010] In some embodiments, the power supply component includes a 24V lithium battery for providing direct current; the DC motor has a rated power of 500W.
[0011] In some embodiments, the first end of the chain is fixed to the lower hook assembly, and both the upper hook assembly and the lower hook assembly have one pulley block, forming a three-chain configuration; or,
[0012] The first end of the chain is fixed to the upper hook assembly. The upper hook assembly has one pulley group, and the lower hook assembly has two pulley groups to form a four-chain configuration.
[0013] In some embodiments, the bottom of the transmission housing of the transmission device has two chain through holes;
[0014] The electric tensioner also includes a laser diffuse reflection sensor for detecting whether the two ends of the chain have reached the limit distance; the laser diffuse reflection sensor is located at the bottom of the transmission device and close to the chain through hole.
[0015] In some embodiments, the power supply component includes a battery housing, which is a closed housing.
[0016] In some embodiments, the transmission housing, the motor housing, and the motor housing are all made of aluminum alloy.
[0017] In some embodiments, the motor housing is provided with heat dissipation grooves; a cooling fan is provided on one side of the DC motor.
[0018] This utility model provides an innovatively designed split-type electric wire tensioner, which solves several problems of traditional wire tensioners through a series of innovative designs, such as bulky structure, inconvenient operation, and insufficient power. The split-type electric wire tensioner in this utility model not only improves work efficiency and reduces operational difficulty, but also enhances work safety. It is suitable for occasions requiring efficient tensioning, such as power construction and transmission line maintenance.
[0019] Additional advantages, objects, and features of this invention will be set forth in part in the description which follows, and will in part become apparent to those skilled in the art upon review of the description, or may be learned by practice of the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures specifically pointed out in the description and drawings.
[0020] Those skilled in the art will understand that the objectives and advantages achievable with this invention are not limited to those specifically described above, and that the above and other objectives achievable with this invention will become clearer from the following detailed description. Attached Figure Description
[0021] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, do not constitute a limitation thereof. The components in the drawings are not drawn to scale but are merely for illustrating the principles of the present invention. For ease of illustration and description of certain parts of the present invention, corresponding portions in the drawings may be enlarged, i.e., may appear larger relative to other components in an exemplary device actually manufactured according to the present invention. In the drawings:
[0022] Figure 1 This is a schematic diagram of the structure of a split-type electric wire tensioner in one embodiment of the present invention.
[0023] Figure 2 This is a perspective view of the main body in one embodiment of the present invention.
[0024] Figure 3 This is a perspective view of the main body in one embodiment of the present invention from another angle.
[0025] Figure 4This is a perspective view of the main body after the motor housing is hidden in one embodiment of the present invention.
[0026] Figure 5 This is a schematic diagram of the structure of the second end of the chain in one embodiment of the present invention.
[0027] Reference numerals: 1. Upper hook assembly; 2. Chain; 21. First end; 22. Second end; 3. Lower hook assembly; 4. Speed change device; 41. Speed change device housing; 411. Chain through hole; 51. DC motor; 52. Driving pinion; 53. Driven gear; 54. Motor bracket; 55. Bearing bracket; 56. Bearing; 57. Motor housing; 571. Heat dissipation groove; 6. Power supply assembly; 61. Battery housing; 7. Laser diffuse reflection sensor. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this utility model are used to explain the present utility model, but are not intended to limit the present utility model.
[0029] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the solution 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.
[0030] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, element, step, or component, but does not exclude the presence or addition of one or more other features, elements, steps, or components.
[0031] It should also be noted that, unless otherwise specified, the term "connection" in this article can refer not only to a direct connection, but also to an indirect connection involving an intermediary.
[0032] In the following description, embodiments of the present invention will be illustrated with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar parts, or the same or similar steps.
[0033] This utility model provides an innovatively designed split-type electric wire tensioner. Through a series of innovative designs (such as a split structure, pulley and chain drive, laser sensor limit detection, and aluminum alloy material), it solves several problems associated with traditional wire tensioners, such as bulky structure, inconvenient operation, and insufficient power. The split-type electric wire tensioner in this embodiment not only improves work efficiency and reduces operational difficulty but also enhances work safety. It is suitable for applications requiring efficient tensioning, such as power construction and transmission line maintenance.
[0034] like Figure 1 As shown, this split-type electric wire tensioner includes a main body and a hook system. The hook system is the main load-bearing structure, while the main body is the drive structure. The two bear different forces; the hook system only bears the tension along the running direction of chain 2, while the main body only needs to provide the corresponding power. The main body has better stability and can more easily support larger loads with a smaller size and weight. Traditional wire tensioners are usually a single unit, which is inconvenient to disassemble and transport, and difficult to maintain. With the split design, the electric drive unit and the hook system can be operated independently, greatly improving convenience, flexibility, and safety. Operators can separate the electric main body and the hook system as needed for easy handling and use; they can also adjust the configuration of the hook system and the placement of the electric main body according to the working environment, making it more flexible and versatile in use.
[0035] The hook system includes an upper hook assembly 1, a chain 2, and a lower hook assembly 3. The main body and the upper hook assembly 1 are separate components. The upper hook assembly 1 is used to hook onto a fixed object, serving as a load-bearing structure. The lower hook assembly 3 is used to hook onto the target object. The first end 21 of the chain 2 is fixed to the lower hook assembly 3 or the chain 2 itself. The middle portion of the chain 2 is wound around the pulley system of the upper hook assembly 1 and the pulley system of the lower hook assembly 3. The second end 22 of the chain 2 passes through the sprocket of the main body and exits. In this embodiment, the hook system is primarily responsible for connecting to the taut object and providing the necessary tension and connection. The chain 2 can be made of high-strength steel or alloy materials, possessing good wear resistance and tensile strength. The chain 2 transmits power through the pulley system, providing the necessary traction force.
[0036] Furthermore, such as Figures 2-4 As shown, the main body includes a power supply component 6, a DC motor 51, a gear set, and a speed change device 4. The power supply component 6 and the DC motor 51 are located on opposite sides of the speed change device 4 along its main shaft axis. The output shaft of the DC motor 51 is parallel to the main shaft of the speed change device 4. The gear set includes a driving pinion 52 and a driven gear 53. The driving pinion 52 is mounted on the output shaft of the DC motor 51 or on a shaft connected to the output shaft. The driven gear 53 is mounted on the input shaft of the speed change device 4. The end of the output shaft of the DC motor 51 is supported by a bearing 56.
[0037] In the above embodiment, the electric tensioner uses a DC motor 51, which has the advantage of providing a large torque output at a lower voltage. It is configured as a 24V DC motor 51, suitable for the efficient operation of power tools. The DC motor 51 has a fast response speed and adjustable speed, allowing for precise control of the equipment's speed and traction. The transmission device 4 can consist of several sets of gears, which can convert the high-speed rotation of the motor into a low-speed, high-torque output. Arranging the motor and power supply components 6 (such as batteries) on both sides of the transmission device 4 helps to effectively utilize the internal space of the equipment, optimize the layout, and make the entire device more compact. This reduces the overall size and weight of the equipment, making it easier to carry, install, and transport. This design helps improve the weight distribution of the equipment. By evenly distributing the motor and battery on both sides of the transmission device 4, the center of gravity of the equipment can be effectively lowered, improving the balance and stability of the entire system. The balanced design reduces vibrations that may occur during operation, reduces the mechanical burden on the equipment during high-speed operation, and ensures more stable operation. By directly connecting the motor to the transmission device 4 or placing it in a close position, the length of the power transmission system can be reduced. This compact layout reduces energy loss between the drive shaft and gears, thereby improving the overall system efficiency. The shorter power transmission path makes the transmission between the motor and gearbox 4 more direct, reducing mechanical friction and energy waste. Maintenance and repair are simplified when both the power supply component 6 and the motor are located on either side of the gearbox 4. Since these critical components are concentrated in a specific location, technicians can quickly locate and replace the parts that need inspection during maintenance. Placing the motor and power supply component 6 (such as the battery) on both sides in this design improves heat dissipation efficiency. Since motors typically generate a significant amount of heat during operation, and batteries also generate heat, a proper layout ensures that heat does not accumulate in one place, making heat dissipation easier. This helps maintain a stable system temperature, preventing overheating damage to critical components and extending the equipment's lifespan. The modular design allows for functionally modular layouts of the components. Placing the motor and battery on either side of the gearbox 4 facilitates a more flexible design. For example, the battery, motor, or gearbox 4 can be flexibly replaced as needed without excessive space constraints.
[0038] In the above embodiment, the output shaft end of the DC motor 51 is supported by a bearing 56. The bearing 56 provides a low-friction operating surface, thereby reducing friction and wear from direct contact. This not only improves the efficiency of the motor but also extends the service life of the output shaft and other components. The bearing 56 provides precise support, ensuring the stability of the output shaft during rotation and preventing shaft offset or wobbling during operation. This ensures more stable power output from the motor, avoiding vibration and noise caused by shaft instability, and improving the working accuracy and reliability of the mechanical system. The bearing 56 effectively distributes the load on the output bearing 56, avoiding wear and damage caused by local overload. Especially when the motor needs to withstand axial and radial loads, the bearing 56 can provide more uniform support, reducing the impact of load concentration on the shaft. The support of the bearing 56 also helps reduce the heat generated by friction between the shaft and other components. The lubrication of the bearing 56 can effectively reduce the heat generated by friction, thereby preventing overheating of the motor and other mechanical components and helping the motor to operate stably for a longer period of time.
[0039] In some embodiments, such as Figure 4 As shown, the transmission device 4 has a transmission device housing 41, and a bearing bracket 55 is fixedly mounted on one side of the transmission device housing 41. The bearing 56 is installed inside the bearing bracket 55. By fixing the bearing bracket 55 and installing the bearing 56 on one side of the transmission device housing 41, this design can effectively improve the load-bearing capacity, operational stability, and durability of the transmission device 4, while simplifying the assembly and maintenance process. This design optimizes the overall performance of the transmission device 4, enabling it to maintain stability under higher loads and longer operating times, and reducing wear and malfunctions.
[0040] In some embodiments, such as Figure 2 and Figure 3 As shown, the main body also includes a motor housing 57, which is connected to the transmission device housing 41 via a motor bracket 54. The DC motor 51 is fixedly connected to the motor bracket 54, which has a plate-like structure. The connection between the motor housing 57 and the transmission device housing 41 via the motor bracket 54 ensures the fixation and stability between the motor and the transmission device 4. This connection method helps maintain the shaft alignment between the motor and the transmission device 4, ensuring efficient transmission during operation. The DC motor 51 is fixedly connected to the housing via the motor bracket 54. This ensures that the motor will not shift during operation, maintaining its stability and preventing unnecessary vibration or noise. The plate-like structure is relatively simple, easy to manufacture and assemble, and reduces material waste. The large contact area of the plate-like structure helps dissipate heat, especially under high load operation, effectively reducing the temperature rise of the motor and surrounding components. The plate-like structure facilitates installation in limited spaces and better adapts to compact design requirements.
[0041] In some embodiments, the power supply component 6 includes a 24V lithium battery for providing direct current (DC); the DC motor 51 has a rated power of 500W. The 24V lithium battery is the system's power supply component, its main function being to provide stable direct current (DC) to supply the electrical energy required for the DC motor 51 to operate. Compared to other types of batteries (such as lead-acid batteries), lithium batteries have a higher energy density, thus providing more electrical energy in the same volume and weight, which helps to improve the device's battery life. Lithium batteries are also lightweight, helping to reduce the overall weight of the device, especially suitable for electric wire tensioners requiring a portable or compact design. Lithium batteries have high charge and discharge efficiency, enabling faster charging and reducing energy loss. The speed of the DC motor 51 can be precisely controlled by adjusting the voltage or current, suitable for electric wire tensioners requiring variable speed and precise control.
[0042] In some embodiments, the first end 21 of the chain 2 is fixed to the lower hook assembly 3. Both the upper hook assembly 1 and the lower hook assembly 3 have one pulley group, forming a three-chain configuration. The three chains 2 work together, suitable for high-load scenarios, such as a 9t load, balancing load capacity and lifting speed. In some embodiments, the first end 21 of the chain 2 is fixed to the upper hook assembly 1. The upper hook assembly 1 has one pulley group, and the lower hook assembly 3 has two pulley groups, forming a four-chain configuration. The four chains 2 share the load, providing a more balanced tension output, suitable for applications requiring higher precision and high power output, such as 12t and 15t loads.
[0043] like Figure 3As shown, in some embodiments, the gearbox housing 41 of the gearbox 4 has two chain through holes 411 at its bottom; the electric tensioner also includes a laser diffuse reflection sensor 7 for detecting whether the two ends of the chain 2 have reached the limit distance; the laser diffuse reflection sensor 7 is disposed at the bottom of the gearbox 4 and close to the chain through holes 411. The chain through holes 411 are designed to allow the chain 2 to pass through the device, thereby enabling the chain 2 to cooperate with other mechanical components (such as the electric tensioner or other drive systems). The main function of the laser diffuse reflection sensor 7 is to detect the position of an object (here, the chain 2) by emitting a laser and receiving the beam reflected back from the surface of the object. Compared with conventional contact sensors, laser sensors can detect the presence and position of a target object without contact, and have higher accuracy and reliability. In this embodiment, the laser diffuse reflection sensor 7 is used to detect whether the two ends of the chain 2 have reached the limit distance (e.g., 2-10 mm). This means that when the two ends of the chain 2 reach the predetermined limit point, the sensor can send a signal to notify the system to take appropriate measures (e.g., stop the motor to stop rotating). The sensor is mounted at the bottom of the transmission 4, near the chain through-hole 411. This position is designed to allow the sensor to accurately detect the position of the chain 2 passing through the through-hole. Through the laser reflection of the sensor, the system can detect in real time whether the chain 2 has reached the preset limit, thereby ensuring the safety and performance of the equipment.
[0044] In the above embodiments, the laser diffuse reflection sensor 7 provides extremely high detection accuracy. Compared to traditional contact sensors, the laser sensor performs non-contact measurement using a laser beam, enabling it to detect minute positional changes in the chain 2 and ensuring the precision of chain 2 tension adjustment. The laser diffuse reflection sensor 7 measures by the reflection of the laser beam from the object's surface, eliminating the need for direct contact. This eliminates interference from wear, corrosion, and physical contact, allowing for long-term stable operation and reducing maintenance frequency and costs. For electric tensioners, this means longer periods of stable operation, avoiding control problems caused by wear or failure of contact sensors. Compared to traditional photoelectric or contact sensors, the laser sensor is less affected by dust, moisture, and other environmental factors, enabling stable operation under harsh conditions. This is particularly important for applications in complex environments such as high temperature, high humidity, and dust in electric tensioner applications, ensuring efficient and reliable operation. The laser diffuse reflection sensor 7 has a high response speed, allowing for real-time monitoring of the movement positions at both ends of the chain 2. The adjustment of the electric tensioner requires timely response to changes in the position of both ends of chain 2. The laser sensor can quickly detect when chain 2 reaches its limit distance or undergoes displacement, thereby promptly sending a signal to the control system to start or stop the electric tensioner. This ensures that the entire system can react quickly, guaranteeing the stability and safety of the equipment.
[0045] In some embodiments, such as Figure 2 and Figure 3 As shown, the power supply assembly 6 includes a battery housing 61, which is a sealed housing. The sealed battery housing 61 effectively prevents moisture and dust from entering the housing, protecting the battery from external environmental influences. The waterproof and dustproof design allows the power supply assembly 6 to operate stably in harsh environments, making it particularly suitable for outdoor tensioner equipment. The waterproof and dustproof battery housing 61 significantly improves the reliability of the battery assembly in complex environments. The intrusion of moisture and dust can lead to battery short circuits, leakage, or performance degradation, and even equipment malfunction. The sealed housing effectively prevents these problems and extends the equipment's lifespan. The sealed design of the battery housing 61 typically meets some level of IP (Ingress Protection) rating, such as IP67 or IP68.
[0046] In some embodiments, the transmission housing 41, motor housing 57, and motor housing 57 are all made of aluminum alloy. Aluminum alloy has a low density and is lighter than other metals such as steel. This allows the use of aluminum alloy in the transmission housing 41 and motor housing 57 to effectively reduce the overall weight of the device, improving portability and operational flexibility. Aluminum alloy also has high thermal conductivity, which helps the motor housing 57 and transmission housing 41 dissipate heat effectively. During operation of the motor and transmission 4, a certain amount of heat is generated. The aluminum alloy material helps to quickly conduct heat from the inside to the outside, preventing overheating, thereby extending the service life of components and ensuring normal operation of the device. Aluminum alloy has natural corrosion resistance, and a dense aluminum oxide film forms on its surface, effectively resisting corrosion from water, air, and other chemicals. This makes aluminum alloy perform excellently in humid and corrosive environments (such as outdoor and industrial environments), less prone to rust or corrosion, thus improving the durability and reliability of the motor housing 57 and transmission housing 41.
[0047] In some embodiments, such as Figure 2 and Figure 3As shown, the motor housing 57 is provided with heat dissipation grooves 571; a cooling fan is provided on one side of the DC motor 51. The heat dissipation grooves 571 are created by adding certain channel structures to the surface or interior of the motor housing 57 to enhance heat dissipation. The heat dissipation grooves 571 increase the surface area of the motor housing 57, allowing more heat to dissipate through convection or radiation, thereby effectively reducing the heat generated during motor operation. The design of the heat dissipation grooves helps improve the heat conduction efficiency inside and outside the motor housing 57, enabling the motor to dissipate heat more quickly and maintain a safe operating temperature range. The cooling fan mechanically forces air into the motor, enhancing airflow and accelerating heat dissipation. Compared to passive cooling (such as heat dissipation grooves 571 or heat sinks), the cooling fan provides stronger heat dissipation capabilities. By blowing air, the fan increases heat exchange efficiency, effectively reducing motor temperature under high load and high temperature environments. The cooling fan increases airflow inside the motor, preventing heat from accumulating inside and ensuring that heat quickly flows out of the motor, thus protecting the motor from high-temperature damage. The continuous operation of the fan helps maintain a stable motor temperature, preventing overheating and performance degradation caused by excessive temperature fluctuations. By effectively reducing the motor temperature, the cooling fan keeps the motor within its optimal operating temperature range, which not only improves its stability and reliability but also enhances its operating efficiency and lifespan.
[0048] In this 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 or in place of features of other embodiments.
[0049] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. For those skilled in the art, various modifications and variations can be made to the embodiments of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A split body electric stringer characterized in that, The electric tightener comprises a body and a hook system, the hook system comprises an upper hook assembly (1), a chain (2) and a lower hook assembly (3); The body is separately arranged from the upper hook assembly (1); the upper hook assembly (1) is used for hooking a fixed object as a force structure; the lower hook assembly (3) is used for hooking an action object; a first end (21) of the chain (2) is fixed to the lower hook assembly (3) or the lower hook assembly (3), a middle part of the chain (2) is wound around a pulley set of the upper hook assembly (1) and a pulley set of the lower hook assembly (3), and a second end (22) of the chain (2) is passed out from a sprocket of the body after being wound around. The body comprises a power supply assembly (6), a DC motor (51), a gear set and a speed change device (4); the power supply assembly (6) and the DC motor (51) are arranged on both sides of the speed change device (4) in the direction of the main shaft axis; the output shaft of the DC motor (51) is arranged in parallel with the main shaft of the speed change device (4); the gear set comprises a driving pinion (52) and a driven gear (53); the driving pinion (52) is installed on the output shaft of the DC motor (51) or a rotating shaft connected with the output shaft; the driven gear (53) is installed on the input shaft of the speed change device (4); and the end of the output shaft of the DC motor (51) is supported by a bearing (56).
2. The split-case electric tightener according to claim 1, wherein The speed change device (4) has a speed change device housing (41), one side of the speed change device housing (41) is fixedly provided with a bearing support (55), and the bearing (56) is installed in the bearing support (55).
3. The split-body electric tightener according to claim 2, wherein, The body further comprises a motor housing (57), the motor housing (57) is connected with the speed change device housing (41) through a motor support (54), the DC motor (51) is fixedly connected with the motor support (54), and the motor support (54) is in a plate structure.
4. The split-case electric tightener according to claim 1, wherein The power supply assembly (6) comprises a 24V lithium battery for providing DC power; and the rated power of the DC motor (51) is 500W.
5. The split-case electric tightener according to claim 1, wherein The first end (21) of the chain (2) is fixed to the lower hook assembly (3), and the pulley sets of the upper hook assembly (1) and the lower hook assembly (3) are both provided with one to form a three-chain form; or The first end (21) of the chain (2) is fixed to the upper hook assembly (1), the pulley set of the upper hook assembly (1) is provided with one, and the pulley set of the lower hook assembly (3) is provided with two to form a four-chain form.
6. The split-case electric tightener according to claim 3, wherein The speed change device housing (41) of the speed change device (4) has two chain through holes (411) at the bottom; The electric tightener further comprises a laser diffuse reflection sensor (7) for detecting whether the two ends of the chain (2) reach a limiting distance; the laser diffuse reflection sensor (7) is arranged at the bottom of the speed change device (4) and close to the chain through hole (411).
7. The split-case electric tightener according to claim 6, wherein The power supply assembly (6) comprises a battery housing (61), and the battery housing (61) is a closed housing.
8. The split-case electric tightener according to claim 7, wherein The variable speed device housing (41), the motor housing (57) and the motor housing (57) are all made of aluminum alloy material.
9. The split-case electric tightener according to claim 3, wherein The motor housing (57) is provided with a heat dissipation groove (571); one side of the direct current motor (51) is provided with a heat dissipation fan.