A portable hoisting tool

Abstract

This utility model relates to the field of wind turbine equipment hoisting technology and discloses a portable hoisting tool, including: a crossbeam, a hoisting assembly, and a support assembly. The crossbeam includes a main beam, a first side beam, and a second side beam, with both ends of the main beam connected to the first and second side beams respectively. The hoisting assembly is slidably connected to the main beam. The support assembly includes: a fixed support and an adjustable support. One end of the fixed support is connected to the first side beam, and one end of the adjustable support is connected to the second side beam. Both the fixed support and the adjustable support have a folded state parallel to the main beam and a support state perpendicular to the main beam. This utility model solves the problem of low hoisting efficiency of the oil pump motor inside the wind turbine nacelle.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine equipment hoisting technology, specifically to a portable hoisting tool. Background Technology

[0002] Wind power, as a clean and efficient renewable energy technology, has been widely used globally. The wind turbine, as the core equipment of a wind power system, converts wind energy into mechanical energy through the rotor, and then converts it into electrical energy output through the power generation equipment inside the nacelle. The wind turbine nacelle is located at the top of the wind turbine tower, and its internal space houses many key electromechanical devices required for wind turbines, such as the main shaft, gearbox, generator, and oil pump motor.

[0003] The gearbox oil pump motor drives the oil pump system within the wind turbine gearbox, ensuring the wind turbine's normal and stable operation. Existing gearbox oil pump motors are generally quite heavy, typically around 120kg, and have a cylindrical shape. They lack handles for easy manual handling, making manual transport difficult. Furthermore, the confined space within the wind turbine nacelle, usually accommodating only two or three workers for disassembly and maintenance, further increases the difficulty of transport. During actual maintenance, coupling damage frequently occurs, requiring the gearbox oil pump motor and coupling to be removed as a whole and moved to an open area for replacement. Current technology lacks a specialized, portable lifting tool that can adapt to the complexities of wind turbine nacelle space, resulting in low efficiency in lifting gearbox oil pump motors, increasing worker workload and operational risks. There is an urgent need for a portable oil pump motor lifting tool applicable to different wind turbine nacelle structures to effectively improve the lifting efficiency of oil pump motors inside the wind turbine nacelle. Utility Model Content

[0004] In view of this, the present invention provides a portable hoisting tool to solve the problem of low hoisting efficiency of oil pump motors inside wind turbine nacelles.

[0005] In a first aspect, this utility model provides a portable hoisting tool, comprising:

[0006] A crossbeam, comprising a main beam, a first side beam, and a second side beam, wherein the two ends of the main beam are respectively connected to the first side beam and the second side beam;

[0007] A hoisting assembly, which is slidably connected to the main beam;

[0008] The support assembly includes a fixed support and an adjustable support. One end of the fixed support is connected to the first side beam, and one end of the adjustable support is connected to the second side beam. Both the fixed support and the adjustable support have a folded state parallel to the main beam and a supported state perpendicular to the main beam.

[0009] Beneficial effects

[0010] The support components feature a foldable design, allowing for rapid deployment to provide stable support when the wind turbine gearbox oil pump motor needs to be hoisted. After hoisting, they can be folded up to reduce space occupation and facilitate transportation and storage. The combination of fixed and adjustable supports ensures stable positioning and load-bearing of the hoisting tools within the wind turbine nacelle, improving the safety and stability of the oil pump motor hoisting operation, reducing worker workload, and increasing the efficiency of hoisting the oil pump motor inside the wind turbine nacelle.

[0011] In one alternative embodiment, the length of the second side beam is greater than the length of the first side beam.

[0012] Beneficial effects

[0013] The second side beam is longer than the first side beam, which optimizes the folding and storage path and space occupation of the support components. The support components prioritize the folding of the fixed support components, and then the folding of the adjustable support components. The longer second side beam also provides more operating space for the folding and rotation of the fixed support components, improving the foldability and ease of operation of the hoisting tools.

[0014] In one optional embodiment, the fixed support includes a column and a fixing plate, one end of the column is connected to the first side beam, the fixing plate is connected to the other end of the column, and when the fixed support is in the supported state, the fixing plate is adapted to be connected to the fan gearbox.

[0015] In one optional embodiment, two insertion holes are spaced apart on one end of both the first side beam and the support column. Insertion members are adapted to be installed in the insertion holes of the first side beam and the corresponding insertion holes of the support column. When the insertion member is installed in one of the insertion holes of the first side beam and the support column, the fixed support member can rotate around the insertion member to the folded state parallel to the main beam. When the insertion member is installed in both insertion holes of the first side beam and the support column, the fixed support member is in the support state perpendicular to the main beam.

[0016] Beneficial effects

[0017] The fixed support can flexibly switch between a folded state and a supported state. When only one connector is inserted, the fixed support can rotate around the connection point to a folded state parallel to the main beam, achieving quick storage and saving space. When connectors are inserted into both connector holes, the fixed support is firmly fixed in a supported state perpendicular to the main beam, providing stable support force.

[0018] In one optional embodiment, the fixing plate includes a connecting plate and side plates, the connecting plate being connected to the support column, and the two side plates being respectively connected to both sides of the connecting plate.

[0019] In one optional embodiment, the adjusting support includes an adjusting column and a supporting device. The supporting device is connected to one end of the adjusting column, and the other end of the adjusting column and the second side beam are provided with a plurality of adjusting holes at intervals. The adjusting holes are adapted to accommodate adjusting components. When an adjusting component is accommodated in one of the adjusting holes, the adjusting component can rotate around the connection point to the folded state parallel to the main beam. When an adjusting component is accommodated in any two of the adjusting holes, the adjusting component is in the supported state perpendicular to the main beam.

[0020] In one optional embodiment, the support device includes: a base plate, a screw, a nut, and a support block. The base plate is connected to one end of the adjusting column. The base plate has multiple through holes. The nut is disposed above the through holes and is fixedly connected to the base plate. The screw is screwed to the nut, and a set of support blocks is hinged to the bottom of each screw.

[0021] Beneficial effects

[0022] The support device, through a threaded connection between a screw and a nut, combined with adjustable support components, allows the lifting equipment to quickly adjust its support height according to the actual terrain inside the wind turbine nacelle. This adapts to the complex and varied installation conditions inside the nacelle, ensuring the horizontal stability of the lifting equipment during the lifting process. The hinged connection of the support blocks enhances the fit between the support device and the inner wall of the wind turbine nacelle, effectively distributing the load and improving safety and reliability during the lifting process.

[0023] In one alternative implementation, the support block is a triangular steel.

[0024] In one optional embodiment, the hoisting assembly includes: a hand-operated hoist, a hanging beam, a first rope, and a second rope. The hand-operated hoist is slidably connected to the main beam, the hanging beam is connected to the output end of the hand-operated hoist, the first rope is wound around one end of the hanging beam, and the second rope is hooked to the other end of the hanging beam.

[0025] In one optional embodiment, a groove is provided on the main beam, and a slider is provided on the hand-operated hoist, the slider being slidably connected to the groove.

[0026] Beneficial effects

[0027] The hand-operated hoist can slide along the length of the main beam in the groove, thereby realizing the lateral movement of the hoisting position and improving the ease of operation of hoisting operations. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a structural schematic diagram of a portable hoisting tool according to an embodiment of the present utility model;

[0030] Figure 2 This is a schematic diagram of the hoisting assembly according to an embodiment of the present utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the adjusting support member according to an embodiment of the present utility model;

[0032] Figure 4 This is a structural schematic diagram of the fixed support member according to an embodiment of the present utility model.

[0033] Explanation of reference numerals in the attached figures:

[0034] 11. Main beam; 12. First side beam; 13. Second side beam;

[0035] 2. Lifting components; 21. Hand-operated hoist; 22. Hanging beam; 23. First rope; 24. Second rope.

[0036] 31. Fixed support component; 311. Column; 312. Fixed plate; 3121. Connecting plate; 3122. Side plate; 313. Insertion hole; 314. Insertion component; 32. Adjustable support component; 321. Adjustable column; 322. Support device; 3221. Base plate; 3222. Screw; 3223. Nut; 3224. Support block; 323. Adjustment hole; 324. Adjustment component. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0039] According to an embodiment of the present invention, a portable hoisting tool is provided, comprising: a crossbeam, a hoisting assembly 2, and a support assembly. The crossbeam includes a main beam 11, a first side beam 12, and a second side beam 13. The two ends of the main beam 11 are respectively connected to the first side beam 12 and the second side beam 13. The hoisting assembly 2 is slidably connected to the main beam 11. The support assembly includes: a fixed support member 31 and an adjustable support member 32. One end of the fixed support member 31 is connected to the first side beam 12, and one end of the adjustable support member 32 is connected to the second side beam 13. Both the fixed support member 31 and the adjustable support member 32 have a folded state parallel to the main beam 11 and a support state perpendicular to the main beam 11.

[0040] The two ends of the main beam 11 are connected to the first side beam 12 and the second side beam 13 respectively, and both the first side beam 12 and the second side beam 13 are perpendicular to the main beam 11. The main beam 11, the first side beam 12 and the second side beam 13 can be integrally formed or welded from rectangular steel tubes or aluminum alloy profiles to balance strength and weight control.

[0041] The lifting assembly 2 is mounted on the main beam 11 and slidably connected to it, allowing for flexible adjustment of the lifting position according to lifting requirements. The support assembly provides stable support for the entire lifting tool. Both the fixed support 31 and the adjustable support 32 have two switchable states: one is a folded state parallel to the main beam 11, which can be folded and fitted against the main beam 11 when transported or not in use, saving space; the other is a support state perpendicular to the main beam 11, providing stable support for the tool and ensuring overall balance and safety during the lifting process.

[0042] When the hoisting tool is not in use, the fixed support 31 and the adjustable support 32 can be retracted along the main beam 11, significantly saving space and facilitating carrying and storage. In the hoisting state, the fixed support 31 is connected to the wind turbine gearbox perpendicular to the main beam 11, and the adjustable support 32 is supported perpendicular to the main beam 11 to the bottom of the wind turbine nacelle, ensuring structural stability and operational safety during hoisting operations, effectively improving the hoisting efficiency of the hoisting tool in the nacelle, and reducing the risks of manual handling.

[0043] In one embodiment, the length of the second side beam 13 is greater than the length of the first side beam 12.

[0044] Specifically, during the hoisting tool's storage process, the fixed support component 31 is folded and stored first. While the fixed support component 31 is folded, the adjusting support component 32 is then folded and stored to complete the folding and storage of the entire hoisting tool. To meet the folding and storage requirements of the hoisting tool, the length of the second side beam 13 is greater than that of the first side beam 12, providing more ample rotation and storage space for the adjusting support component 32 on the second side beam 13, achieving compact folding of the support components. Simultaneously, when the hoisting tool is deployed, the length of the second side beam 13, being longer than that of the first side beam 12, increases the support angle and length adjustment range of the adjusting support component 32, enhancing the hoisting tool's adaptability to the irregular inner walls of the wind turbine nacelle bottom.

[0045] In one embodiment, the fixed support 31 includes a column 311 and a fixing plate 312. One end of the column 311 is connected to the first side beam 12, and the fixing plate 312 is connected to the other end of the column 311. When the fixed support 31 is in a supported state, the fixing plate 312 is adapted to be connected to the fan gearbox.

[0046] Specifically, the fixing plate 312 is located at one end of the support column 311. It is made of high-strength steel plate and is firmly connected to one end of the support column 311 by welding or screwing. The bottom surface of the fixing plate 312 has several mounting holes for mating with the screw holes reserved on the wind turbine gearbox, so that the hoisting tool can be accurately positioned and firmly installed on the wind turbine gearbox during use, preventing slippage or tilting.

[0047] In one embodiment, two insertion holes 313 are provided at intervals on one end of the first side beam 12 and the support column 311. Insertion members 314 are adapted to be installed in the insertion holes 313 of the first side beam 12 and the corresponding insertion holes 313 of the support column 311. When the insertion member 314 is installed in one insertion hole 313 of the first side beam 12 and the support column 311, the fixed support member 31 can rotate around the insertion member 314 to a folded state parallel to the main beam 11. When the insertion members 314 are installed in both insertion holes 313 of the first side beam 12 and the support column 311, the fixed support member 31 is in a support state perpendicular to the main beam 11.

[0048] Specifically, two corresponding and spaced insertion holes 313 are respectively provided on the bottom of the first side beam 12 and one end of the support column 311. The insertion holes 313 are circular, and the spacing is preset according to the rotation radius of the support column 311 to achieve angle control during folding and unfolding. The insertion piece 314 is a cylindrical pin. The support column 311 is inserted into the bottom of the first side beam 12, and the insertion piece 314 can pass through the insertion hole 313 on the first side beam 12 and be inserted into the insertion hole 313 on the support column 311.

[0049] When the lifting tool is in the folded state, only one connector 314 needs to be installed in one connector hole 313 on the first side beam 12. The support column 311 can then rotate freely around this connector point, allowing it to flip around the point until it is parallel to the main beam 11, thus completing the storage. When the lifting tool is in the supported state, connectors 314 are installed in both connector holes 313 simultaneously. The support column 311 is then firmly locked in a position perpendicular to the main beam 11, forming a stable support structure.

[0050] In one embodiment, the fixing plate 312 includes a connecting plate 3121 and a side plate 3122. The connecting plate 3121 is connected to the support column 311, and the two side plates 3122 are respectively connected to the two sides of the connecting plate 3121.

[0051] Specifically, the connecting plate 3121 has a rectangular flat plate structure and is fixed to the support column 311 by welding. On each of the two sides of the connecting plate 3121, an L-shaped side plate 3122 extending vertically downward is welded.

[0052] The bottom end of the side plate 3122 has several positioning holes for mating with the pre-set mounting holes or limiting components on the surface of the wind turbine gearbox, ensuring that the fixing plate 312 is accurately positioned and securely installed during installation. The side plate 3122 not only increases the contact area of ​​the fixing plate 312 and improves the load-bearing capacity, but also enhances the deformation resistance of the lifting tools under stress.

[0053] In one embodiment, the adjusting support 32 includes an adjusting column 321 and a supporting device 322. The supporting device 322 is connected to one end of the adjusting column 321. The other end of the adjusting column 321 and the second side beam 13 are provided with a plurality of adjusting holes 323 at intervals. The adjusting holes 323 are suitable for setting adjusting members 324. When an adjusting member 324 is set in one adjusting hole 323, the adjusting member 324 can rotate around the connection point to a folded state parallel to the main beam 11. When any two adjusting holes 323 are set with adjusting members 324, the adjusting member 324 is in a supporting state perpendicular to the main beam 11.

[0054] Specifically, the adjusting column 321 is a hollow square tube, one end of which is connected to the second side beam 13 via an adjusting member 324. The adjusting column 321 is provided with multiple adjusting holes 323 arranged longitudinally at intervals. The bottom end of the second side beam 13 has two adjusting holes 323, which are circular. The bottom end of the second side beam 13 is inserted into the adjusting column 321, and the adjusting member 324 can be inserted into the corresponding adjusting holes 323 of the adjusting column 321 and the second side beam 13.

[0055] The adjusting element 324 is a cylindrical pin. Inserting it into different adjusting holes 323 changes the rotation angle and length of the adjusting column 321 relative to the second side beam 13. In practical use, when the adjusting element 324 is inserted into only one of the adjusting holes 323, the adjusting column 321 can rotate freely around that connection point, facilitating its rotation to a folded state parallel to the main beam 11. When the adjusting element 324 is inserted into two different adjusting holes 323 on the adjusting column 321, the depth to which the second side beam 13 is inserted into the adjusting column 321 can be changed, thereby adjusting the length of the adjusting support 32. At the same time, the adjusting column 321 is also restricted to a support state perpendicular to the main beam 11, forming a stable support structure.

[0056] In one embodiment, the support device 322 includes: a base plate 3221, a screw 3222, a nut 3223, and a support block 3224. The base plate 3221 is connected to one end of the adjusting column 321. The base plate 3221 has multiple through holes. A nut 3223 is provided above the through holes and is fixedly connected to the base plate 3221. The screw 3222 is screwed to the nut 3223, and a set of support blocks 3224 is hinged to the bottom of each screw 3222.

[0057] Specifically, the base plate 3221 is a rectangular steel plate, and its upper surface is fixedly connected to the adjusting column 321 by welding, serving as the connecting base between the support device 322 and the adjusting column 321. Multiple through holes are evenly distributed on the base plate 3221; these through holes are circular through holes for inserting multiple screws 3222.

[0058] Two nuts 3223 are installed above each through hole. The nuts 3223 are fixed to the base plate 3221 by welding. The screw 3222 is a threaded cylindrical rod. Its threaded end is connected to the top thread of the nut 3223. The extension length of the screw 3222 can be adjusted by rotating it, thereby fine-tuning the support height of the entire support device 322.

[0059] Each screw 3222 has a set of support blocks 3224 hinged to its bottom end. The support blocks 3224 can automatically adjust the contact angle according to the different inclination angles of the ground to ensure full contact with the ground and improve the stability and adaptability of the support.

[0060] In one embodiment, the support block 3224 is a triangular steel.

[0061] Specifically, the triangular steel has two vertical sides and one inclined side. The bottom end of the screw 3222 is hinged to the vertical point of the triangular steel through a pin to achieve a rotatable fit. The inclined side of the triangular steel contacts the ground surface, improving the overall load-bearing capacity of the support block 3224.

[0062] The triangular steel structure possesses excellent structural strength and stability, and can effectively resist lateral sliding or deflection during hoisting. Furthermore, the hinged connection allows the triangular steel to be angled according to the wind turbine nacelle ground, maintaining a stable fit at all times and ensuring that the adjustable support component 32 provides excellent support performance under different ground conditions.

[0063] In one embodiment, the hoisting assembly 2 includes: a hand-operated hoist 21, a hanging beam 22, a first fiber rope 23, and a second fiber rope 24. The hand-operated hoist 21 is slidably connected to the main beam 11, the hanging beam 22 is connected to the output end of the hand-operated hoist 21, the first fiber rope 23 is wound around one end of the hanging beam 22, and the second fiber rope 24 is hooked to the other end of the hanging beam 22.

[0064] Specifically, the hand-operated hoist 21 is a portable wire rope hoist, and its output end is connected to the middle of the hanging beam 22 via a hook. The hanging beam 22 is a rectangular steel crossbar with hanging ring structures at both ends for connecting the first fiber rope 23 and the second fiber rope 24. Both the first fiber rope 23 and the second fiber rope 24 are made of high-strength synthetic fiber material, which has good flexibility and load-bearing capacity.

[0065] In practical use, the first sling 23 is wound inside the square protrusion of the oil pump motor; the second sling 24 is hooked into the lug on the right side of the oil pump motor via a hook. During hoisting, the load on both ends of the hanging beam 22 can be finely adjusted according to the center of gravity of the load to ensure that the suspended object remains balanced in the vertical direction and avoids rotation or tilting.

[0066] In one embodiment, a groove is provided on the main beam 11, and a slider is provided on the hand-operated hoist 21, with the slider slidably connected to the groove.

[0067] Specifically, the main beam 11 is a hollow rectangular steel structure with a C-shaped cross-section. A groove is set along the longitudinal direction at its bottom, and a guide rail surface is provided inside the groove to limit the offset and sway of the slider during the sliding process.

[0068] The hand-operated hoist 21 has a slider at its upper part, the size of which matches the slide groove of the main beam 11, and guide flanges on both sides of the slider to fit snugly against the inner wall of the slide groove. The slider is connected to the body of the hand-operated hoist 21 by a bolted structure, so that the entire hand-operated hoist 21 can move along the length of the main beam 11 in the slide groove with the slider.

[0069] During actual hoisting operations, the operator can push the slider to move the hand-operated hoist 21 on the main beam 11 according to the actual position of the oil pump motor, quickly positioning the hoisting location. The sliding fit between the groove and the slider ensures smooth movement and accurate positioning.

[0070] Instructions for use: First, carry the hoisting tool to the target work area inside the wind turbine nacelle and unfold the support components to the supported position. Workers then use connectors 314 and 324 to rotate the fixed support component 31 and the adjustable support component 32 from their folded state to their vertical supported state, ensuring they are firmly in contact with the gearbox housing and the bottom of the wind turbine nacelle, guaranteeing the stability and reliability of the entire hoisting structure. Adjust the height of the support component 32 by rotating the screw 3222, ensuring the support block 3224 is fully in contact with the ground, improving the overall stability of the hoisting tool.

[0071] Then, the hoisting assembly 2 is installed onto the main beam 11, and its position is adjusted. Based on the position of the oil pump motor, the workers push the slider of the hand-operated hoist 21 to slide within the groove of the main beam 11, accurately aligning it with the lifting point. After positioning, the workers pull the hand-operated hoist 21 and slowly lift the oil pump motor and coupling using the first cable 23 and the second cable 24.

[0072] After lifting the oil pump motor and coupling as a whole, move the oil pump motor and coupling together along the slideway to an open area and lower them. Use a hoist to lower the oil pump motor and coupling as a whole and place them in an open area before replacing the damaged coupling. After replacement, lift the oil pump motor and coupling as a whole again and move them along the slideway to the installation position, then lower them to a suitable height to install the coupling and oil pump motor.

[0073] After the oil pump motor is hoisted to the target height and installed, the staff unloads the hoisting component 2 in sequence, and folds the fixed support component 31 and the adjusting support component 32 in sequence to complete the storage and transfer of the hoisting tools.

[0074] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A portable hoisting tool, characterized in that, include: The crossbeam includes a main beam (11), a first side beam (12) and a second side beam (13), with the two ends of the main beam (11) connected to the first side beam (12) and the second side beam (13) respectively. The hoisting assembly (2) is slidably connected to the main beam (11); The support assembly includes a fixed support (31) and an adjustable support (32). One end of the fixed support (31) is connected to the first side beam (12), and one end of the adjustable support (32) is connected to the second side beam (13). Both the fixed support (31) and the adjustable support (32) have a folded state parallel to the main beam (11) and a supported state perpendicular to the main beam (11).

2. The portable hoisting tool according to claim 1, characterized in that, The length of the second side beam (13) is greater than the length of the first side beam (12).

3. The portable hoisting tool according to claim 1, characterized in that, The fixed support member (31) includes a support column (311) and a fixing plate (312). One end of the support column (311) is connected to the first side beam (12), and the fixing plate (312) is connected to the other end of the support column (311). When the fixed support member (31) is in the supported state, the fixing plate (312) is adapted to be connected to the fan gearbox.

4. The portable hoisting tool according to claim 3, characterized in that, Two insertion holes (313) are provided at one end of the first side beam (12) and the support column (311). Insertion members (314) are suitable for being installed in the insertion holes (313) of the first side beam (12) and the corresponding insertion holes (313) of the support column (311). When the insertion member (314) is installed in one of the insertion holes (313) of the first side beam (12) and the support column (311), the fixed support member (31) can rotate around the insertion member (314) to the folded state parallel to the main beam (11). When the insertion member (314) is installed in both insertion holes (313) of the first side beam (12) and the support column (311), the fixed support member (31) is in the support state perpendicular to the main beam (11).

5. The portable hoisting tool according to claim 3, characterized in that, The fixing plate (312) includes a connecting plate (3121) and a side plate (3122). The connecting plate (3121) is connected to the other end of the support column (311). The two side plates (3122) are respectively connected to the two sides of the connecting plate (3121), and the side plates (3122) are adapted to be connected to the fan gearbox.

6. The portable hoisting tool according to claim 1, characterized in that, The adjustable support (32) includes an adjustable column (321) and a support device (322). The support device (322) is connected to one end of the adjustable column (321). The other end of the adjustable column (321) and the second side beam (13) are provided with a plurality of adjustable holes (323) at intervals. The adjustable holes (323) are suitable for setting adjustable members (324). When an adjustable member (324) is set in one of the adjustable holes (323), the adjustable member (324) can rotate around the connection point to the folded state parallel to the main beam (11). When any two of the adjustable holes (323) are set with the adjustable member (324), the adjustable member (324) is in the support state perpendicular to the main beam (11).

7. The portable hoisting tool according to claim 6, characterized in that, The support device (322) includes: a base plate (3221), a screw (3222), a nut (3223), and a support block (3224). The base plate (3221) is connected to one end of the adjusting column (321). The base plate (3221) has multiple through holes. The nut (3223) is placed above the through holes and is fixedly connected to the base plate (3221). The screw (3222) is screwed to the nut (3223), and a set of support blocks (3224) is hinged to the bottom of each screw (3222).

8. The portable hoisting tool according to claim 7, characterized in that, The support block (3224) is made of triangular steel.

9. The portable hoisting tool according to claim 1, characterized in that, The hoisting assembly (2) includes: a hand-operated hoist (21), a hanging beam (22), a first fiber rope (23), and a second fiber rope (24). The hand-operated hoist (21) is slidably connected to the main beam (11), the hanging beam (22) is connected to the output end of the hand-operated hoist (21), the first fiber rope (23) is wound around one end of the hanging beam (22), and the second fiber rope (24) is hooked to the other end of the hanging beam (22).

10. The portable hoisting tool according to claim 9, characterized in that, The main beam (11) is provided with a sliding groove, and the hand-operated hoist (21) is provided with a slider, which is slidably connected to the sliding groove.

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