Compact bilateral winding device

Abstract

The invention relates to the field of mechanical transmission and supporting, in particular to a compact type bilateral winding device. The device comprises a main body structure composed of a first driving source, a first planetary reducer, a first roller, a second driving source, a second planetary reducer, a second roller and a support, the first driving source and the second driving source are fixed to the planetary reducers, the planetary reducers are fixed to the support, and the first roller and the second roller can be connected with the support in the mode of rotating around the axes of the first roller and the second roller. The driving source can be a power source such as a motor or a motor, the driving source drives the corresponding rollers through the planetary reducer, the supporting cylinder of the first roller is inserted into the second roller and is in running fit with the second roller through a supporting bearing, and the device further comprises structures such as a self-aligning ring and specific assembly design of the planetary reducer. The winding device has the technical effects that the overall structure is more compact, the space is reasonably arranged, meanwhile, the accurate and reliable transmission speed reduction function is achieved, the operation stability of the device is guaranteed through the design of all parts, and the service life is prolonged.

Description

Technical Field

[0001] This application relates to the field of mechanical transmission and support, and in particular to a compact double-sided winch device. Background Technology

[0002] In recent years, the wind power installation sector has achieved remarkable development. With the continuous growth of energy demand and the increasing emphasis on clean energy, wind power generation has been widely adopted as a sustainable energy solution. Wind power installation projects have also increased accordingly, covering both offshore and onshore wind power projects. This has not only driven the development of the wind power equipment manufacturing industry but also spurred progress in related supporting industries, such as transportation and hoisting. Improvements in wind power installation technology have led to higher construction efficiency and lower costs for wind farms, making a significant contribution to the adjustment of the global energy structure. At the same time, the development of wind power installation has also prompted higher demands on related equipment and technologies to adapt to more complex and diverse installation environments.

[0003] In traditional wind power installations, mobile cranes or marine equipment are often used for lifting operations. To achieve different lifting functions, the common approach is to add equipment components or expand the overall size of the equipment. For example, this can be done by adding different types of lifting booms or changing to different specifications of lifting tools. Additionally, more auxiliary devices, such as different types of clamps and measuring instruments, can be integrated into the equipment to meet diverse operational needs. However, these methods often require significant space, as the added components and devices all need corresponding installation locations and operating space.

[0004] Existing mobile cranes or marine equipment, when used for wind power installations, are limited by their inherent space constraints, making it difficult to accommodate multiple functions under the same conditions. When attempting to add functionality, space limitations arise, restricting the installation and operation of the equipment and preventing it from fully realizing its intended purpose. Summary of the Invention

[0005] To address the issue that existing equipment, due to limited space, cannot accommodate multiple functions, this application provides a compact double-sided winch device.

[0006] The compact double-sided winch device provided in this application adopts the following technical solution: A compact double-sided hoisting device includes: a first drive source, a first planetary reducer, a first drum, a second drive source, a second planetary reducer, a second drum, and a support. The first planetary reducer and the second planetary reducer are connected to the support, and the first drum and the second drum are both rotatable around their own axes and connected to the support. The output shaft of the first drive source is connected to the input end of the first planetary reducer, and the first roller is sleeved on the outside of the first planetary reducer and connected to the output end of the first planetary reducer. The output shaft of the second drive source is connected to the input end of the second planetary reducer, and the second roller is sleeved on the outside of the second planetary reducer and connected to the output end of the second planetary reducer. The first roller has a support cylinder at the end away from the first reducer. The support cylinder is at least partially inserted into the second roller, and the support cylinder is rotatably engaged with the second roller through a support bearing.

[0007] By adopting the above technical solution, the compact double-sided winch device's structural design reduces its space occupation, meeting the space constraints of mobile cranes or marine installations in wind power projects. The first drive source, the first planetary reducer, and the first drum work together; the second drive source, the second planetary reducer, and the second drum work together, enabling independent power transmission and winding functions, ensuring the independence of each component's function. Simultaneously, the support cylinder of the first drum is inserted into the second drum and rotates through a support bearing, reducing the footprint while enhancing the overall stability and reliability of the device.

[0008] Optionally, the bracket includes a support body, and the support body has drive source support seats at both ends. The body of the first drive source and the body of the second drive source are respectively fixedly connected to the drive source support seats.

[0009] By adopting the above technical solution, drive source support seats are set at both ends of the support body, so that the bodies of the first drive source and the second drive source are fixedly connected to the drive source support seats respectively. This can effectively fix the position of the drive source, ensure the structural stability of the entire compact double-sided winch device, meet the usage requirements under limited space conditions, and solve the related problems of insufficient space and independent functions.

[0010] Optionally, the support body is provided with roller support plates near both ends, and the roller support plates are provided with support flanges on their adjacent sides. The end of the first roller near the first reducer and the end of the second roller near the second reducer are respectively rotatably engaged with the support flanges through bearings.

[0011] By adopting the above technical solution, the roller support plates and support flanges at both ends of the main body, together with the bearings, realize the rotational cooperation between the first roller and the second roller and the support flange, making the rotation of the first roller and the second roller on the support more stable, solving the problem of limited space for mobile cranes or ships in wind power installation, and ensuring that each function of the device operates independently.

[0012] Optionally, a connecting flange is provided on the side of the roller support plate that is far apart from each other, and the body of the first drive source and the body of the second drive source are respectively fixedly connected to the connecting flange.

[0013] By adopting the above technical solution, a connecting flange is set on the side of the drum support plates that are far apart from each other, and the bodies of the first and second drive sources are fixedly connected to the connecting flange respectively. This allows the first and second drive sources to be stably installed on the bracket, ensuring the overall stability of the compact double-sided winch device and improving the reliability of the device's operation. The output shaft of the drive source and the input end of the reducer are connected by a spline, relying on the meshing of multiple tooth grooves to transmit torque. This makes it easier to align the shaft and the hole during installation, simplifying the assembly operation. At the same time, the spline pair adopts a clearance fit, ensuring smooth installation and easier separation during disassembly and maintenance.

[0014] Optionally, both the first planetary reducer and the second planetary reducer include a planetary reduction mechanism and a housing. The planetary reduction mechanism is disposed within the housing. The planetary reduction mechanism includes a primary reduction component and a secondary reduction component. The input end of the secondary reduction component is used to receive external power, and the output end of the secondary reduction component is drivenly connected to the input end of the primary reduction component. The output end of the primary reduction component is drivenly connected to the first roller or the second roller.

[0015] By adopting the above technical solution, both the first planetary reducer and the second planetary reducer include a planetary reduction mechanism and a housing. The planetary reduction mechanism is located inside the housing and includes a primary reduction component and a secondary reduction component. The input end of the secondary reduction component receives external power, and the output end of the secondary reduction component is driven and connected to the input end of the primary reduction component. The output end of the primary reduction component is driven and connected to the first or second roller. This can realize two-stage reduction of power and transmit it to the roller, adapt to different working requirements, realize functions in a limited space, and solve the problems of insufficient space and independent functions.

[0016] Optionally, the secondary reduction assembly includes a high-speed gear shaft, multiple high-speed planetary gears, a high-speed planetary carrier, and a high-speed external gear ring. The high-speed external gear ring is fixedly connected to the housing. The high-speed planetary carrier has carrier feet and carrier rings. One end of the high-speed gear shaft serves as the input end of the secondary reduction assembly. The high-speed planetary gears are rotatably connected to the carrier feet of the high-speed planetary carrier via bearings, and the high-speed planetary gears mesh with the gear portions of the high-speed external gear ring and the high-speed gear shaft, respectively. The carrier rings of the high-speed planetary carrier serve as the output end of the secondary reduction assembly and are drivenly connected to the input end of the primary reduction assembly.

[0017] By adopting the above technical solution, one end of the high-speed gear shaft receives external power, which is then transmitted to the high-speed gear shaft. The rotation of the high-speed gear shaft drives multiple high-speed planetary gears meshing with it to rotate around their own axis. Since the high-speed planetary gears are rotatably connected to the carrier legs of the high-speed planetary carrier through bearings, and the high-speed external gear ring is fixedly connected to the housing, the high-speed planetary gears revolve around the high-speed gear shaft while rotating around their own axes, thereby driving the high-speed planetary carrier to rotate. The carrier ring of the high-speed planetary carrier, as the output end of the second-stage reduction component, transmits power to the input end of the first-stage reduction component, realizing two-stage reduction transmission of power. Optionally, the first-stage reduction assembly includes a low-speed sun gear, multiple low-speed planet gears, a low-speed planet carrier, and a low-speed external gear ring. The low-speed external gear ring is fixedly connected to the housing. The low-speed planet carrier has carrier feet and carrier rings. The low-speed sun gear is fixedly connected to the carrier rings of the high-speed planet carrier. The carrier rings of the low-speed planet carrier are fixedly connected to the roller support plate. The low-speed planet gears are rotatably connected to the carrier feet of the low-speed planet carrier via bearings around their own axes. The low-speed planet gears mesh with the low-speed external gear ring and the low-speed sun gear respectively. The low-speed external gear ring serves as the output end of the first-stage reduction assembly and is drivenly connected to the first roller or the second roller through the housing.

[0018] By adopting the above technical solution, external power first drives the high-speed gear shaft of the secondary reduction assembly to rotate, which in turn drives the multiple high-speed planetary gears meshing with it to rotate. Because the high-speed external gear ring is fixed to the housing and constrained, the high-speed planetary gears are forced to revolve around the high-speed gear shaft while rotating, thereby driving the high-speed planetary carrier to rotate at a reduced speed, achieving the first stage of reduction. The output end of the high-speed planetary carrier is connected to the low-speed sun gear of the primary reduction assembly, driving the low-speed sun gear to rotate. The low-speed sun gear drives the multiple surrounding low-speed planetary gears to rotate. Because the low-speed planetary carrier is fixed to the roller support plate, the low-speed planetary gears cannot revolve around the shaft and can only rotate freely on the fixed shaft. This constraint causes the rotational motion of the low-speed planetary gears to drive the rotation of the meshing low-speed external gear ring, and feeds this rotation back to the high-speed external gear ring of the secondary reduction assembly. The low-speed external gear ring, as the output end of the primary reduction assembly, transmits the final reduction power to the first or second roller through the housing.

[0019] Optionally, it also includes a self-aligning ring, which is disposed on the side of the second roller near the first roller. The side of the self-aligning ring near the second roller is provided with a self-aligning flange. The self-aligning ring is coaxially and fixedly connected to the second roller through the self-aligning flange. A plurality of self-aligning bolts are provided at equal intervals around the circumference of the self-aligning ring. The self-aligning bolts are threaded to the self-aligning ring and are arranged radially along the self-aligning ring. A ball head is provided at one end of the self-aligning bolt near the center of the self-aligning ring. The ball head is used to abut against the outer wall of the support cylinder.

[0020] By adopting the above technical solution, the self-aligning ring is coaxially and fixedly connected to the second drum through the self-aligning flange, and multiple radial self-aligning bolts are set at equal intervals around the circumference. The ball head at one end of the self-aligning bolt abuts against the outer wall of the support cylinder, which can adjust the support cylinder to ensure the coaxiality of the first drum and the second drum. This makes the compact double-sided winch device operate more stably, reduces wear and failures caused by misalignment, improves the reliability and service life of the device, and better solves the problem of limited space and independent functions, adapting to the usage needs of space-constrained scenarios such as wind power installation.

[0021] Optionally, the length L of the support cylinder inserted into the second roller conforms to the following formula: L≥k*Ls*(σ / E)*(D / Ls)^2 Where k is the design coefficient, Ls is the total length of the first roller and the support cylinder, σ is the allowable bending stress of the support cylinder material, E is the elastic modulus of the support cylinder material, and D is the inner diameter of the second roller.

[0022] By adopting the above technical solution, the lower limit of the design for the length of the support cylinder inserted into the second drum should conform to a specific formula relationship. Based on the total length of the first drum and the support cylinder, the allowable bending stress and elastic modulus of the support cylinder material, and the inner diameter of the second drum, a suitable insertion length can be accurately determined. This ensures that the support cylinder is subjected to reasonable force in the second drum, avoids problems such as bending deformation caused by improper insertion length, improves the stability and reliability of the entire compact double-sided winch device, effectively solves the mechanical performance problems that may occur due to the arrangement of components in a limited space, and better adapts to the application needs of wind power installation and other scenarios.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. By designing the components of a compact double-sided winch device, the problem of existing wind power installation equipment being unable to accommodate multiple functions due to limited space has been solved; 2. The first and second rollers, through a specific connection method and their cooperation with the support, can effectively utilize space and achieve a compact layout; 3. The rotating fit design between the support cylinder and the second roller further optimizes space utilization and ensures the normal operation of the device in a limited space. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the compact double-sided winch device provided in the embodiments of this application.

[0025] Figure 2 This is a front view of the compact double-sided winch device provided in the embodiments of this application.

[0026] Figure 3 yes Figure 2 Sectional view at point AA.

[0027] Explanation of reference numerals in the attached drawings: 1-First drive source; 2-First roller; 3-Second drive source; 4-Second roller; 5-Bracket; 501-Support body; 502-Drive source support seat; 503-Roller support plate; 504-Support flange; 505-Connecting flange; 6-Planetary reduction mechanism; 601-High-speed gear shaft; 602-High-speed planetary gear; 603-High-speed planetary carrier; 604-High-speed external gear ring; 605-Low-speed sun gear; 606-Low-speed planetary gear; 607-Low-speed planetary carrier; 608-Low-speed external gear ring; 7-Housing; 8-Self-aligning ring; 9-Self-aligning flange; 10-Self-aligning bolt; 11-Disc brake. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0029] This application discloses a compact double-sided winch device.

[0030] like Figure 1 As shown, the compact double-sided winch device includes a first drive source 1, a first planetary reducer, a first drum 2, a second drive source 3, a second planetary reducer, a second drum 4, a support 5, and a self-aligning ring 8. The first and second planetary reducers are connected to the support 5. Both the first drum 2 and the second drum 4 are rotatable around their own axes and connected to the support 5. The output shaft of the first drive source 1 is connected to the input end of the first planetary reducer. The first drum 2 is fitted around the first planetary reducer and connected to its output end. The output shaft of the second drive source 3 is connected to the input end of the second planetary reducer. The second drum 4 is fitted around the second planetary reducer and connected to its output end. A support cylinder is located at the end of the first drum 2 furthest from the first reducer. The support cylinder is at least partially inserted into the second drum 4 and rotates with the second drum 4 via a support bearing. The self-aligning ring 8 is located on the side of the second drum 4 closest to the first drum 2. This structural design makes the entire device compact, achieving the function of a double-sided winch within a limited space, and solving the problem of limited space in existing wind power installation equipment, which makes it difficult to accommodate more functions.

[0031] like Figure 2 and Figure 3 As shown, the first drive source 1 serves as the power source, providing power for the rotation of the first roller 2. The first drive source 1 can be a motor or a dual-output-shaft permanent magnet motor. The dual-output-shaft permanent magnet motor has the characteristics of large output torque and stable speed. In practical applications, one end of the dual-output-shaft permanent magnet motor serves as the power output end, and the other end can be equipped with a brake disc, which, together with the disc brake 11, achieves braking.

[0032] like Figure 2 and Figure 3 As shown, the bracket 5 supports the entire device, ensuring the stable operation of all components. The bracket 5 includes a support body 501, with drive source support seats 502 at both ends. The bodies of the first drive source 1 and the second drive source 3 are fixedly connected to the drive source support seats 502. Roller support plates 503 are located near both ends of the support body 501. Support flanges 504 are located on the sides of the roller support plates 503 that are close to each other. The ends of the first roller 2 near the first reducer and the second roller 4 near the second reducer are respectively rotatably connected to the support flanges 504 via bearings. Connecting flanges 505 are located on the sides of the roller support plates 503 that are far apart from each other. The bodies of the first drive source 1 and the second drive source 3 are fixedly connected to the connecting flanges 505. The bracket 5 can be welded from high-strength steel, possessing sufficient strength and stability.

[0033] like Figure 2 and Figure 3As shown, the first planetary reducer is used to reduce the rotational speed of the first drive source 1 and increase the torque to meet the working requirements of the first roller 2. The first planetary reducer includes a planetary reduction mechanism 6 and a housing 7, with the planetary reduction mechanism 6 housed within the housing 7. The planetary reduction mechanism 6 includes a primary reduction assembly and a secondary reduction assembly. The input end of the secondary reduction assembly is used to receive external power, i.e., the power from the first drive source 1. The output end of the secondary reduction assembly is drivenly connected to the input end of the primary reduction assembly, and the output end of the primary reduction assembly is drivenly connected to the first roller 2. The secondary reduction assembly includes a high-speed gear shaft 601, multiple high-speed planetary gears 602, a high-speed planetary carrier 603, and a high-speed external gear ring 604. The high-speed external gear ring 604 is fixedly connected to the housing 7. The high-speed planetary carrier 603 has carrier feet and carrier rings. One end of the high-speed gear shaft 601 serves as the input end of the secondary reduction assembly. The high-speed planetary gears 602 are rotatably connected to the carrier feet of the high-speed planetary carrier 603 via bearings, and the high-speed planetary gears 602 mesh with the gear portions of the high-speed external gear ring 604 and the high-speed gear shaft 601, respectively. The carrier rings of the high-speed planetary carrier 603 serve as the output end of the secondary reduction assembly and are driven to the input end of the primary reduction assembly. The first-stage reduction assembly includes a low-speed sun gear 605, multiple low-speed planetary gears 606, a low-speed planetary carrier 607, and a low-speed external gear ring 608. The low-speed external gear ring 608 is fixedly connected to the housing 7. The low-speed planetary carrier 607 has carrier feet and carrier rings. The low-speed sun gear 605 is fixedly connected to the carrier ring of the high-speed planetary carrier 603. The carrier ring of the low-speed planetary carrier 607 is fixedly connected to the roller support plate 503. The low-speed planetary gears 606 are rotatably connected to the carrier feet of the low-speed planetary carrier 607 through bearings around their own axes. The low-speed planetary gears 606 mesh with the low-speed external gear ring 608 and the low-speed sun gear 605 respectively. The low-speed external gear ring 608, as the output end of the first-stage reduction assembly, is driven and connected to the first roller 2 through the housing 7.

[0034] In actual use, external power first drives the high-speed gear shaft 601 of the secondary reduction assembly to rotate, which in turn drives the multiple high-speed planetary gears 602 meshing with it to rotate. Because the high-speed external gear ring 604 is fixed and constrained to the housing 7, the high-speed planetary gears 602 are forced to revolve around the high-speed gear shaft 601 while rotating, thereby driving the high-speed planetary carrier 603 to rotate at a reduced speed, achieving the first stage of reduction. The output end of the high-speed planetary carrier 603 is connected to the low-speed sun gear 605 of the primary reduction assembly, driving the low-speed sun gear 605 to rotate. The low-speed sun gear 605 drives the multiple surrounding low-speed planetary gears 606 to rotate. Because the low-speed planetary carrier 607 is fixed to the roller support plate 503, the low-speed planetary gears 606 cannot revolve and can only spin freely on the carrier legs of the low-speed planetary carrier 607. This constraint causes the rotation of the low-speed planetary gears 606 to drive the low-speed external gear ring 608 meshing with it to rotate, and this rotation is fed back to the high-speed external gear ring 604 of the secondary reduction assembly. The low-speed external gear ring 608 serves as the output end of the first-stage reduction assembly, transmitting the final reduction power to the first roller 2 or the second roller 4 through the housing 7.

[0035] The first roller 2 is used to wind ropes and other items, achieving a hoisting function. The first roller 2 can be made of high-strength metal materials, such as alloy steel, to ensure sufficient strength and wear resistance. A support cylinder is provided at the end of the first roller 2 furthest from the first reducer. The support cylinder is at least partially inserted into the second roller 4, and the support cylinder rotates with the second roller 4 via a support bearing. The support cylinder not only enhances the stability of the first roller 2 but also makes the connection between the first roller 2 and the second roller 4 more compact. The length L of the support cylinder inserted into the second roller 4 conforms to the following formula: L≥k*Ls*(σ / E)*(D / Ls)^2, where k is a design coefficient, Ls is the total length of the first roller 2 and the support cylinder, σ is the allowable bending stress of the support cylinder material, E is the elastic modulus of the support cylinder material, and D is the inner diameter of the second roller 4. By rationally designing the length of the support cylinder inserted into the second roller 4, the stability and reliability of the support cylinder during operation can be guaranteed.

[0036] like Figure 2 and Figure 3 As shown, the structure and working principle of the second drive source 3, the second planetary reducer, and the second roller 4 are similar to those of the first drive source 1, the first planetary reducer, and the first roller 2. The second drive source 3 provides power for the rotation of the second roller 4, the second planetary reducer reduces the rotational speed of the second drive source 3 and increases the torque, and the second roller 4 is used for winding ropes and other items. The structure and working principle of the second drive source 3, the second planetary reducer, and the second roller 4 will not be described in detail here.

[0037] like Figure 2 and Figure 3As shown, the self-aligning ring 8 is used to adjust the concentricity between the support cylinder and the second roller 4, ensuring stable operation of the device. The self-aligning ring 8 is located on the side of the second roller 4 closest to the first roller 2. A self-aligning flange 9 is provided on the side of the self-aligning ring 8 closest to the second roller 4. The self-aligning ring 8 is coaxially and fixedly connected to the second roller 4 through the self-aligning flange 9. Multiple self-aligning bolts 10 are evenly spaced around the circumference of the self-aligning ring 8. The self-aligning bolts 10 are threaded to the self-aligning ring 8 and arranged radially along the self-aligning ring 8. A ball head is provided at the end of the self-aligning bolt 10 closest to the center of the self-aligning ring 8, and the ball head is used to abut against the outer wall of the support cylinder. By adjusting the self-aligning bolts 10, the support cylinder and the second roller 4 can maintain good concentricity, reducing vibration and wear during operation.

[0038] The implementation principle of the compact double-sided winch device in this embodiment is as follows: Through a reasonable structural design, the compact double-sided winch device of this embodiment integrates components such as the first drive source 1, the first planetary reducer, the first drum 2, the second drive source 3, the second planetary reducer, and the second drum 4, achieving the function of double-sided winching within a limited space. The first drive source 1 and the second drive source 3 provide power to the first drum 2 and the second drum 4, respectively. The planetary reducer's deceleration and torque amplification effect enables the drums to rotate stably, realizing the winding and release of the rope. The support cylinder enhances the stability of the drums, and the self-aligning ring 8 ensures the concentricity between the support cylinder and the second drum 4, reducing vibration and wear during operation. The entire device has a compact structure and independent functions, effectively solving the problem of limited space in existing wind power installation equipment, which makes it difficult to accommodate more functions, thus improving the efficiency and quality of wind power installation.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A compact double-sided winch device, characterized in that, include: The system comprises a first drive source (1), a first planetary reducer, a first roller (2), a second drive source (3), a second planetary reducer, a second roller (4), and a support (5). The first planetary reducer and the second planetary reducer are connected to the support (5). The first roller (2) and the second roller (4) are both rotatable around their own axes and are connected to the support (5). The output shaft of the first drive source (1) is connected to the input end of the first planetary reducer, and the first roller (2) is sleeved on the outside of the first planetary reducer and connected to the output end of the first planetary reducer. The output shaft of the second drive source (3) is connected to the input end of the second planetary reducer, and the second roller (4) is sleeved on the outside of the second planetary reducer and connected to the output end of the second planetary reducer. The first roller (2) has a support cylinder at one end away from the first reducer. The support cylinder is at least partially inserted into the second roller (4), and the support cylinder is rotatably engaged with the second roller (4) through a support bearing.

2. The compact double-sided winch device according to claim 1, characterized in that, The bracket (5) includes a support body (501), and the support body (501) has drive source support seats (502) at both ends. The body of the first drive source (1) and the body of the second drive source (3) are respectively fixedly connected to the drive source support seats (502).

3. The compact double-sided winch device according to claim 2, characterized in that, The support body (501) is provided with roller support plates (503) near both ends. The roller support plates (503) are provided with support flanges (504) on the side that are close to each other. The end of the first roller (2) near the first reducer and the end of the second roller (4) near the second reducer are respectively rotated with the support flanges (504) through bearings.

4. The compact double-sided winch device according to claim 3, characterized in that, The roller support plate (503) is provided with a connecting flange (505) on the side away from each other, and the body of the first drive source (1) and the body of the second drive source (3) are respectively fixedly connected to the connecting flange (505).

5. The compact double-sided winch device according to claim 4, characterized in that, Both the first planetary reducer and the second planetary reducer include a planetary reduction mechanism (6) and a housing (7). The planetary reduction mechanism (6) is located inside the housing (7). The planetary reduction mechanism (6) includes a primary reduction component and a secondary reduction component. The input end of the secondary reduction component is used to receive external power. The output end of the secondary reduction component is driven to be connected to the input end of the primary reduction component. The output end of the primary reduction component is driven to be connected to the first roller (2) or the second roller (4).

6. The compact double-sided winch device according to claim 5, characterized in that, The secondary reduction assembly includes a high-speed gear shaft (601), multiple high-speed planetary gears (602), a high-speed planetary carrier (603), and a high-speed external gear ring (604). The high-speed external gear ring (604) is fixedly connected to the housing (7). The high-speed planetary carrier (603) has carrier feet and carrier rings. One end of the high-speed gear shaft (601) serves as the input end of the secondary reduction assembly. The high-speed planetary gears (602) are rotatably connected to the carrier feet of the high-speed planetary carrier (603) via bearings, and the high-speed planetary gears (602) mesh with the gear portions of the high-speed external gear ring (604) and the high-speed gear shaft (601), respectively. The carrier rings of the high-speed planetary carrier (603) serve as the output end of the secondary reduction assembly and are driven to the input end of the primary reduction assembly.

7. The compact double-sided winch device according to claim 6, characterized in that, The primary reduction gear assembly includes a low-speed sun gear (605), multiple low-speed planet gears (606), a low-speed planet carrier (607), and a low-speed external gear ring (608). The low-speed external gear ring (608) is fixedly connected to the housing (7). The low-speed planet carrier (607) has carrier legs and carrier rings. The low-speed sun gear (605) is fixedly connected to the carrier rings of the high-speed planet carrier (603). The carrier rings of the low-speed planet carrier (607) are connected to the roller support plate (5). 03) Fixed connection, the low-speed planetary gear (606) is rotatably connected to the frame foot of the low-speed planetary carrier (607) through a bearing around its own axis, and the low-speed planetary gear (606) meshes with the low-speed external gear ring (608) and the low-speed sun gear (605) respectively. The low-speed external gear ring (608) serves as the output end of the first-stage reduction assembly and is driven connected to the first roller (2) or the second roller (4) through the housing (7).

8. The compact double-sided winch device according to claim 1, characterized in that, It also includes a self-aligning ring (8), which is located on the side of the second roller (4) near the first roller (2). The side of the self-aligning ring (8) near the second roller (4) is provided with a self-aligning flange (9). The self-aligning ring (8) is coaxially fixedly connected to the second roller (4) through the self-aligning flange (9). A plurality of self-aligning bolts (10) are provided at equal intervals around the circumference of the self-aligning ring (8). The self-aligning bolts (10) are threadedly connected to the self-aligning ring (8) and are arranged radially along the self-aligning ring (8). One end of the self-aligning bolt (10) near the center of the self-aligning ring (8) is provided with a ball head, which is used to abut against the outer wall of the support cylinder.

9. The compact double-sided winch device according to claim 1, characterized in that, The length L of the support cylinder inserted into the second roller (4) conforms to the following formula. L≥k*Ls*(σ / E)*(D / Ls)^2 Where k is the design coefficient, Ls is the total length of the first roller (2) and the support cylinder, σ is the allowable bending stress of the support cylinder material, E is the elastic modulus of the support cylinder material, and D is the inner diameter of the second roller (4).

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