A manual hydraulic hoisting device for high-altitude installation of power equipment

Abstract

This invention relates to the field of hoisting technology, providing a manual hydraulic hoisting device for high-altitude installation of power equipment. The device includes a main frame, with two front support rods fixedly connected to the front end of the main frame. A front extension rod is slidably connected to the front end of each front support rod. Two side support rods are located at the rear end of the main frame, connected to the rear end of the main frame via a fixed rod. A winding roller is fixedly connected to the top of the fixed rod, and a cable is wound around the outer wall of the winding roller. A fixed wheel is fixedly connected to the other end of the cable, and a guide assembly is provided on the outer wall of the cable. A rotating boom is connected to the top of the main frame via the frame itself. This invention allows for flexible adjustment of the rotating boom angle using a manual hydraulic pump, enabling stable equipment hoisting in conjunction with the hook. Furthermore, a pull-out structure allows for simultaneous extension of the boom and support rods, making operation simple and quick; extension can be achieved simply by pushing a limit plate.

Description

Technical Field

[0001] This invention relates to the field of hoisting technology, specifically to a manual hydraulic hoisting device for high-altitude installation of power equipment. Background Technology

[0002] With the continuous improvement and upgrading of the power system, the demand for construction and operation and maintenance of power facilities such as 10kV and 0.4kV overhead distribution lines and substations is increasing. High-altitude installation of power equipment is becoming more frequent, encompassing the hoisting and placement of various equipment such as distribution switches, cable terminals, and transformer accessories. These operations often face challenges such as complex construction sites, inaccessibility of large cranes in some areas, limited space for high-altitude work, and the safety risks associated with live-line work. Manual hydraulic hoisting devices, with their purely mechanical drive, lack of external power supply, and portability, have become indispensable key equipment in high-altitude installation of power equipment. They are adaptable to special scenarios such as fieldwork and older substations, providing reliable support for high-altitude hoisting operations and ensuring both installation efficiency and operational safety.

[0003] Currently, while existing manual hydraulic hoisting devices for high-altitude installation of power equipment can achieve basic hoisting functions, they have many shortcomings in practical applications, making it difficult to meet the requirements of efficient and safe operations. The existing devices mostly operate the boom extension and support structure adjustment independently. Extending the boom requires the use of special tools to unlock the positioning mechanism, which is cumbersome and time-consuming. Furthermore, after extension, the support structure position must be manually adjusted to match the boom length, failing to achieve synchronous adaptation between hoisting and support structure, significantly reducing operational efficiency and increasing the labor intensity of operators. Simultaneously, the existing devices lack a linkage reset mechanism for the support structure; after the boom is retracted, the support structure requires manual intervention to reset, which is inconvenient. Moreover, in some devices, the support range cannot expand synchronously after boom extension, resulting in insufficient support area and potential safety hazards such as overturning and swaying during hoisting, making it difficult to guarantee the stability of high-altitude hoisting operations. There is also a risk of equipment damage due to delays caused by manual adjustments during operation, failing to meet the high requirements for safety and convenience in high-altitude power installation operations. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a manual hydraulic hoisting device for high-altitude installation of power equipment, which solves the problems of low operational adjustment efficiency and insufficient support area.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a manual hydraulic hoisting device for high-altitude installation of power equipment, comprising a main frame, two front support rods fixedly connected to the front end of the main frame, a front extension rod slidably connected to the front end of the front support rods, two side support rods provided at the rear end of the main frame, the side support rods being connected to the rear end of the main frame via a fixed rod, a winding roller fixedly connected to the top end of the fixed rod, a cable wound around the outer wall of the winding roller, a fixed wheel fixedly connected to the other end of the cable, a guide assembly provided on the outer wall of the cable, a rotating boom connected to the top end of the main frame via the frame body, an extension boom slidably connected to the front end of the rotating boom, a hook installed at the bottom end of the extension boom, a fixed rod two fixedly connected to the top end of both the extension boom and the front extension rod, the fixed rod two located at the top end of the front extension rod being fixedly connected to the fixed wheel, and a limit assembly provided at the top end of both the extension boom and the front extension rod.

[0006] Preferably, the limiting component includes a limiting plate located at the top of the extended boom and the front extended rod, and multiple protrusions are fixedly connected to the top of the two front support rods and the rotating boom. A slot with a size that matches the size of the protrusion is provided at the bottom center of the protrusion.

[0007] Preferably, the guiding assembly includes a guide wheel located on the outer wall of the cable, the guide wheel being rotatably connected to the top of the main frame, the guide wheel being fitted with a housing, the housing being fixedly connected to the main frame, and the cable passing through the inside of the housing.

[0008] Preferably, a manual hydraulic pump is rotatably connected to the bottom end of the rotating boom, and the bottom end of the manual hydraulic pump is rotatably connected to the diagonal brace.

[0009] Preferably, the top of the limiting plate located at the top of the front extension rod is connected to the bottom of the fixed wheel via a spring one, and the top of the limiting plate located at the top of the extension boom is connected to the fixed rod two via a spring two.

[0010] Preferably, the frame includes a vertical support rod fixedly connected to the top of the main frame, a diagonal support rod is installed at the top of the vertical support rod, the bottom end of the diagonal support rod is fixedly connected to the front support rod, and the top end of the diagonal support rod is rotatably connected to the rotating boom.

[0011] Preferably, the bottom ends of the main frame and the side support rods are equipped with casters, and the front end of the front extension rod is equipped with directional wheels.

[0012] Preferably, a protective shell is fixedly connected to the bottom end of the main frame, the protective shell is sleeved on the bottom end of the first fixing rod, and the inner wall of the first fixing rod is connected to the outer wall of the first fixing rod through a spring.

[0013] Preferably, the first fixing rod is fixedly connected to the side support rod, and the first fixing rod is rotatably connected to the main frame.

[0014] Preferably, a groove is provided on the rear side of the main frame, and the side support rod is located in the groove.

[0015] Working Principle: First, the angle of the rotating boom can be adjusted using a manual hydraulic pump. The hook can then be used to lift the equipment. When the boom needs to be extended, the limiting plate is pushed upwards, compressing the spring and disengaging it from the protrusion. This allows the extended boom to be pulled out of the rotating boom. Releasing the spring and allowing it to return to its original position allows the central slot to engage with the protrusion, thus limiting the position of the extended boom. Similarly, the front extension rod can be pulled out of the front support rod and limited in position. When the front extension rod is pulled out, it moves along with the fixed rod, which in turn moves the fixed wheel. The fixed wheel pulls the cable, and since the other end of the cable is wound on the outer wall of the take-up roller, when the cable is pulled, the cable can rotate the take-up roller, which in turn rotates the fixed rod. The fixed rod is fixedly connected to the side support rod, which in turn rotates the side support rod, adjusting its position to the rear end of the main frame, thereby improving the overall support effect of the device and making the support effect more stable. At the same time, the rotation of the fixed rod can do work on the spring, causing the spring to contract. When the front extension rod is retracted to the front support rod, the fixed wheel loses its traction force on the cable. At this time, the spring returns to its original position, which in turn resets the fixed rod, thus resetting the side support rod.

[0016] This invention provides a manual hydraulic hoisting device for high-altitude installation of power equipment. It has the following advantages: 1. This invention allows for flexible adjustment of the boom angle via a manual hydraulic pump, enabling stable equipment hoisting in conjunction with the hook. Furthermore, the pull-out structure allows for simultaneous extension of the boom and support rod, making operation simple and quick. When extending the boom, simply push the limit plate to unlock and pull it out. After release, the spring automatically resets and engages to achieve positioning, eliminating the need for complex tools and cumbersome steps, thus significantly improving the adjustment efficiency of hoisting operations.

[0017] 2. When the extended rod of this invention extends, it can drive the cable, winding roller and side support rod to rotate in conjunction, automatically adjusting the support structure to the optimal support position, realizing synchronous adaptation between hoisting and support structure, effectively avoiding the cumbersome operation caused by adjusting each component individually, and improving the overall ease of use.

[0018] 3. The present invention, through the linkage structure of the front extension rod, cable, winding roller and spring, can automatically extend the side support rod to the rear end of the main frame while extending the boom, which significantly expands the support range and the support force area, greatly improves the overall support stability of the device, and effectively prevents safety hazards such as overturning and shaking during hoisting.

[0019] 4. When the extended rod is retracted, the spring can automatically drive the side support rod to reset by its own elastic force without the need for manual intervention. This achieves automatic return of the support structure, which not only ensures stable support under booms of different lengths, but also simplifies the reset operation of the support structure and improves the safety and reliability of the device. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the side support rod of the present invention; Figure 3 This is a schematic diagram of the protrusion of the present invention; Figure 4 This is a schematic diagram of the protective shell of the present invention.

[0021] The components are as follows: 1. Main frame; 2. Front support rod; 3. Front extension rod; 4. Vertical support rod; 5. Diagonal support rod; 6. Rotating boom; 7. Extension boom; 8. Hook; 9. Manual hydraulic pump; 10. Side support rod; 11. Limiting plate; 12. Spring 1; 13. Fixed wheel; 14. Cable; 15. Winding roller; 16. Fixed rod 1; 17. Guide wheel; 18. Outer shell; 19. Protrusion; 20. Spring 2; 21. Protective shell; 22. Clockwork spring; 23. Fixed rod 2. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example: Please see the appendix Figure 1 - Appendix Figure 4This invention provides a manual hydraulic hoisting device for high-altitude installation of power equipment, including a main frame 1. The main frame 1 is welded from high-strength alloy profiles, and the overall structure has high structural rigidity and fatigue resistance, capable of withstanding the vertical load and lateral overturning moment generated during the hoisting of power equipment. It is not prone to deformation or cracking after long-term use, meeting the needs of frequent transfers and multiple hoisting operations on construction sites. Two front support rods 2 are fixedly connected to the front end of the main frame 1. The two front support rods 2 are symmetrically distributed, providing uniform and stable support force to the front end of the device, preventing excessive force on one side from causing tilting or displacement of the device. A front extension rod 3 is slidably connected to the front end of the front support rods 2. The front support rods 2 and the front extension rods 3 are designed with a clearance fit. The surface is smoothed to prevent jamming or sticking during the pulling process. The clearance is strictly controlled to ensure smooth sliding without excessive wobbling. The front extension rod 3 can be pulled out from the front support rod 2, and the extension length can be flexibly adjusted according to the on-site hoisting height and working radius, adapting to different voltage levels and installation heights of power equipment installation scenarios, such as transformer accessory hoisting, pole-mounted switch installation, and cable terminal fixing, among other high-altitude operation needs. The rear end of the main frame 1 is equipped with two side support rods 10, which extend to both sides of the rear of the main frame 1 when extended, significantly expanding the bottom support range of the device and improving the overall grounding area and anti-overturning capacity, especially when the boom is fully extended and the load is large, effectively... To prevent accidents such as backward tilting or tipping, the side support rod 10 is connected to the rear end of the main frame 1 via a fixed rod 16. The fixed rod 16 adopts a rigid shaft structure and is fastened to the side support rod 10 with no relative rotational clearance, ensuring that the side support rod 10 can rotate synchronously and stably with the fixed rod 16. The fixed rod 16 enables the side support rod 10 to rotate smoothly without jamming, allowing for seamless switching between the extended support position and the retracted position. A winding roller 15 is fixedly connected to the top of the fixed rod 16. The winding roller 15 is coaxially fixed with the fixed rod 16, with no relative slippage during rotation, enabling precise torque transmission. A cable 14 is wound around the outer wall of the winding roller 15. The cable 14 is made of high-strength flexible steel wire rope. It features high tensile strength, wear resistance, and resistance to stretching deformation. Its length will not change due to repeated stretching during long-term use. The take-up roller 15 can rewind the cable 14 smoothly and synchronously, preventing tangling, knotting, or misalignment, thus ensuring the reliability of the linkage structure. A fixed wheel 13 is fixedly connected to the other end of the cable 14. The fixed wheel 13 is made of wear-resistant metal with a smooth surface, reducing friction loss between it and the cable 14 and extending its service life. When the front extension rod 3 is pulled out from the front support rod 2, it moves along with the fixed wheel 13 via the fixed rod 23, the direction of movement consistent with the extension / retraction direction of the front extension rod 3. The fixed wheel 13 then pulls the cable 14.The tension transmission is stable and efficient, without loosening or slippage. The outer wall of the cable 14 is equipped with a guide component, which constrains and guides the movement path of the cable 14, preventing it from shifting or swaying during pulling and ensuring precise transmission of tension to the take-up roller 15. The top of the main frame 1 is connected to a rotating boom 6. The overall frame structure is stable, providing reliable support for the rotating boom 6 and bearing the load and torque transmitted by it. The angle of the rotating boom 6 can be adjusted via a manual hydraulic pump 9. The manual hydraulic pump 9 features a manual pressurization and depressurization reset structure, making operation simple and labor-saving. No external power is required, and a single person can perform angle adjustment. The adjustment process is smooth and controllable, allowing the rotating boom 6 to be precisely positioned at a specified angle to meet the lifting and positioning needs of different heights and orientations. An extension boom 7 is slidably connected to the front end of the rotating boom 6. Both the rotating boom 6 and the extension boom 7 employ a precision clearance fit structure, ensuring smooth extension and precise positioning. The extension boom 7 can extend as needed to increase the lifting height and working radius. For higher-altitude power equipment installation operations, the extended boom 7 is equipped with a hook 8 at its bottom. The hook 8 is made of high-strength alloy steel and features an anti-slip latch structure, which effectively prevents the sling from slipping during the hoisting of power equipment, improving the safety of the hoisting process. Both the extended boom 7 and the top of the front extension rod 3 are fixedly connected to a fixing rod 23. The extended boom 7 can be pulled out from the rotating boom 6, and at the same time, it can move along with the fixing rod 23 connected to the extended boom 7. The fixing rod 23 serves as a connection and force transmission mechanism. To ensure the limiting components can move synchronously with the extended boom 7, the fixed rod 23 at the top of the front extension rod 3 is fixedly connected to the fixed wheel 13, ensuring a secure and unwavering connection. This guarantees that the extension and retraction of the front extension rod 3 can be accurately transmitted to the fixed wheel 13, achieving a linkage effect. Limiting components are installed at the top of both the extended boom 7 and the front extension rod 3. These components can quickly lock in place after extension, preventing the extended boom 7 and the front extension rod 3 from retracting or sliding during lifting operations, maintaining stable length, and ensuring the safety of the lifting operation.

[0024] The limiting assembly includes a limiting plate 11 located at the top of the extended boom 7 and the front extended rod 3. The limiting plate 11 is made of hard, wear-resistant metal, with high structural strength, and is not easily worn or deformed by repeated use. A magnet is fixedly connected to the bottom of the limiting plate 11, which can attract the front support rod 2 or the rotating boom 6. The magnetic attraction force is moderate, which can improve the stability of the limiting plate 11, prevent the limiting plate 11 from loosening and shifting due to vibration during operation, and will not affect the subsequent manual pushing and unlocking operation, thereby improving the stability of the limiting plate 11. Multiple protrusions 19 are fixedly connected to the top of the two front support rods 2 and the rotating boom 6. The protrusions 19 are along the front support rods 2 and the rotating boom 6. The rod 2 and the rotating boom 6 are evenly distributed along their length. The spacing between adjacent protrusions 19 is reasonably designed to allow for multiple length adjustments to meet the needs of different operating scenarios. A slot with a size that matches the size of the protrusion 19 is provided at the bottom center of the protrusion 19. The inner wall of the slot is smooth and fits tightly with the protrusion 19. There is no loose gap after engagement. When the limiting plate 11 is pulled upward, the limiting plate 11 can compress the second spring 20 and the first spring 12. The compression process is smooth and unobstructed, thereby causing the protrusion 19 to disengage from the slot in the middle of the limiting plate 11. The disengagement is complete and without jamming, which allows the extended boom 7 and the front extension rod 3 to move. The guiding assembly includes a guide wheel 17 located on the outer wall of the cable 14. The guide wheel 17 guides the cable 14, ensuring it maintains a stable trajectory and preventing tension loss or structural jamming due to path deviation. The guide wheel 17 is rotatably connected to the top of the main frame 1, allowing for flexible and unrestricted rotation. It rotates synchronously with the cable 14, further reducing friction loss. The guide wheel 17 is fitted with a housing 18, which is fixedly connected to the main frame 1. The cable 14 passes through the housing 18. The housing 18 prevents the cable 14 from detaching from the guide wheel 17 and also blocks dust and debris from entering the guide wheel 17, preventing impurities from accumulating and causing rotational obstruction. This improves the durability and reliability of the guiding assembly. A manual hydraulic pump 9 is rotatably connected to the bottom of the rotating boom 6. The bottom of the manual hydraulic pump 9 is rotatably connected to the diagonal brace 5. Both ends of the manual hydraulic pump 9 are movable, which can adaptively adjust the position according to the angle change of the rotating boom 6, ensuring a stable and effective hydraulic drive process. By manually pressurizing, the rotating boom 6 can be pushed upward, and by depressurizing, the rotating boom 6 can be slowly lowered. The adjustment process is smooth and safe, without sudden rises and falls, protecting the lifting equipment from impact damage.The top of the limiting plate 11 located at the top of the front extension rod 3 is connected to the bottom of the fixed wheel 13 via spring 12. Spring 12 is a return spring, which is elastic and stable and not prone to fatigue failure after long-term use. When the limiting plate 11 can compress spring 12, the limiting plate 11 can be reset by the spring 12 returning to its original position. The reset action is quick and accurate, which makes the groove at the bottom of the limiting plate 11 engage with the protrusion 19. The engagement is firm and reliable, thereby limiting the front extension rod 3. The top of the limiting plate 11 located at the top of the extended boom 7 is connected to the fixed rod 23 via spring 20. Spring 20 is also a high-stability return spring. The limiting plate 11 can compress spring 20, and the spring 20 can return to its original position, thereby limiting the extended boom 7 and ensuring that the extended boom 7 is fixed in position after extension, meeting the load-bearing requirements of high-altitude hoisting. The frame includes vertical support rods 4 fixedly connected to the top of the main frame 1. The vertical support rods 4 are vertically fixed to the main frame 1, bearing the main vertical support force. Diagonal support rods 5 are installed at the top of the vertical support rods 4, and are distributed at an angle, forming a stable triangular support structure with the vertical support rods 4 and the rotating boom 6, significantly improving the overall stability of the frame. The bottom end of the diagonal support rods 5 is fixedly connected to the front support rod 2, and the top end of the diagonal support rods 5 is rotatably connected to the rotating boom 6. The vertical support rods 4 and diagonal support rods 5 provide overall support for the boom, distributing the lifting load and preventing excessive local stress that could lead to structural damage. The bottom ends of the main frame 1 and the side support rods 10 are equipped with casters. These casters are flexible in steering and have a strong load-bearing capacity, allowing the device to turn on the spot and move in any direction. The front extension rod 3 is equipped with directional wheels, ensuring stable movement of the device's front end. The combination of the casters and directional wheels makes the entire device flexible to move, allowing free movement in narrow construction sites and rapid access to the work site. A protective shell 21 is fixedly connected to the bottom of the main frame 1. The protective shell 21 has a closed structure and is dustproof, waterproof and collision-proof. The protective shell 21 is fitted onto the bottom of the fixed rod 16, and the inner wall of the fixed rod 16 is connected to the outer wall of the fixed rod 16 through a spring 22. The spring 22 is housed inside the protective shell 21 and is not affected by the external environment. Its elastic performance is stable and durable. When the fixed wheel 13 pulls the cable 14, the cable 14 drives the winding roller 15 to rotate. The winding roller 15 drives the fixed rod 16 to rotate, thereby doing work on the spring 22, causing the spring 22 to contract and store energy. When the fixed wheel 13 moves toward the main frame 1, the spring 22 returns to its original position, which causes the fixed rod 16 to rotate, thereby causing the side support rod 10 to reset. The reset process does not require manual operation and is completed automatically, simplifying the operation steps. The fixed rod 16 is fixedly connected to the side support rod 10 and rotatably connected to the main frame 1. The connection part is equipped with a wear-resistant bushing, which allows for smooth rotation and is not easily worn after long-term use. When the fixed rod 16 rotates, it can rotate the side support rod 10. The groove size matches the side support rod 10.The rear side of the main frame 1 is provided with a groove, and the side support rod 10 is located in the groove. The groove provides space for the rotation of the side support rod 10.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A manual hydraulic hoisting device for high-altitude installation of power equipment, characterized in that, The system includes a main frame (1), with two front support rods (2) fixedly connected to the front end of the main frame (1). A front extension rod (3) is slidably connected to the front end of the front support rods (2). Two side support rods (10) are provided at the rear end of the main frame (1). The side support rods (10) are connected to the rear end of the main frame (1) via a fixing rod (16). A take-up roller (15) is fixedly connected to the top end of the fixing rod (16). A cable (14) is wound around the outer wall of the take-up roller (15). A fixed wheel (13) is fixedly connected to the other end of the cable (14). The outer wall of the cable (14) is provided with a guide assembly. The top of the main frame (1) is connected to a rotating boom (6) through the frame. The front end of the rotating boom (6) is slidably connected to an extended boom (7). The bottom end of the extended boom (7) is equipped with a hook (8). The top ends of the extended boom (7) and the front extended rod (3) are both fixedly connected to a second fixing rod (23). The second fixing rod (23) located at the top end of the front extended rod (3) is fixedly connected to a fixed wheel (13). The top ends of the extended boom (7) and the front extended rod (3) are both provided with limit assemblies.

2. The manual hydraulic hoisting device for high-altitude installation of power equipment according to claim 1, characterized in that, The limiting assembly includes a limiting plate (11) located at the top of the extended boom (7) and the front extended rod (3). The tops of the two front support rods (2) and the rotating boom (6) are fixedly connected with multiple protrusions (19). The bottom center of the protrusion (19) is provided with a slot whose size is adapted to the size of the protrusion (19).

3. The manual hydraulic hoisting device for high-altitude installation of power equipment according to claim 1, characterized in that, The guide assembly includes a guide wheel (17) located on the outer wall of the cable (14), the guide wheel (17) being rotatably connected to the top of the main frame (1), and a shell (18) being fitted over the guide wheel (17), the shell (18) being fixedly connected to the main frame (1), and the cable (14) passing through the interior of the shell (18).

4. A manual hydraulic hoisting device for high-altitude installation of power equipment according to claim 1, characterized in that, The bottom end of the rotating boom (6) is rotatably connected to a manual hydraulic pump (9), and the bottom end of the manual hydraulic pump (9) is rotatably connected to the diagonal brace (5).

5. A manual hydraulic hoisting device for high-altitude installation of power equipment according to claim 2, characterized in that, The top of the limiting plate (11) located at the top of the front extension rod (3) is connected to the bottom of the fixed wheel (13) via spring one (12), and the top of the limiting plate (11) located at the top of the extension boom (7) is connected to the fixed rod two (23) via spring two (20).

6. A manual hydraulic hoisting device for high-altitude installation of power equipment according to claim 1, characterized in that, The frame includes a vertical support rod (4) fixedly connected to the top of the main frame (1), and a diagonal support rod (5) is installed at the top of the vertical support rod (4). The bottom end of the diagonal support rod (5) is fixedly connected to the front support rod (2), and the top end of the diagonal support rod (5) is rotatably connected to the rotating boom (6).

7. A manual hydraulic hoisting device for high-altitude installation of power equipment according to claim 1, characterized in that, The bottom ends of the main frame (1) and the side support rod (10) are equipped with casters, and the front extension rod (3) is equipped with directional wheels.

8. A manual hydraulic hoisting device for high-altitude installation of power equipment according to claim 1, characterized in that, The bottom end of the main frame (1) is fixedly connected to a protective shell (21). The protective shell (21) is sleeved on the bottom end of the fixing rod (16), and the inner wall of the fixing rod (16) is connected to the outer wall of the fixing rod (16) through a spring (22).

9. A manual hydraulic hoisting device for high-altitude installation of power equipment according to claim 1, characterized in that, The first fixed rod (16) is fixedly connected to the side support rod (10), and the first fixed rod (16) is rotatably connected to the main frame (1).

10. A manual hydraulic hoisting device for high-altitude installation of power equipment according to claim 1, characterized in that, The rear side of the main frame (1) is provided with a groove, and the side support rod (10) is located in the groove.

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