CN217921154U - Portable hoisting tool - Google Patents

Abstract

The application provides a portable lifting device. The portable lifting device comprises: the support comprises a vertical beam and a first cross beam, a first connecting part is arranged at the top of the vertical beam, and one end of the first cross beam is vertically connected with the position, close to the top, of the vertical beam; the hoisting structure comprises a support, a suspension arm and a winch assembly, wherein a second connecting part is arranged at the bottom of the support and is detachably and rotatably connected with the first connecting part, the suspension arm is connected with the top of the support, the winch assembly is connected with the top of the support, and a rope of the winch assembly extends to the suspension arm and is vertically and downwards hoisted to a lifting hook; the number of the bolt fixtures is at least two, and the bolt fixtures are used for clamping the vertical beam and/or the first cross beam on the capacitor framework. Portable lifting device has solved the current hard technical problem consuming time that leads to of building fixed pulley system or building scaffold frame change condenser.

Description

Portable Lifting Tool

technical field

The present application relates to the technical field of electric power maintenance equipment, in particular to a portable hoisting tool.

Background technique

The reactive power compensation capacitors on the low-voltage side bus in the substation often cause part of the capacitors to burn out due to the influence of grid harmonics or ferromagnetic resonance. It is necessary for substation maintenance personnel to frequently replace the burned-out capacitors in multiple substations under their jurisdiction.

However, the weight of a single capacitor is about 100kg. If it is carried by manpower, it is difficult to ensure its own safety and at the same time ensure that the insulating porcelain bottle is not damaged during the transportation process. Therefore, maintenance personnel will build a fixed pulley system or build a scaffold to carry and hoist capacitors when manual handling is difficult.

However, in the process of realizing the invention, the inventor found that the existing fixed pulley system or scaffolding is very cumbersome, and the related materials are not convenient to carry, resulting in time-consuming and labor-intensive work process. Not only the work efficiency is low, but also the safety is poor. Therefore, the above-mentioned technical problems need to be further solved.

Utility model content

The main purpose of the utility model is to provide a portable lifting tool, which can be easily carried and quickly applied to the replacement of capacitors, so as to solve the time-consuming and laborious technical problems caused by the current construction of fixed pulley systems or scaffolding to replace capacitors .

In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

The application provides a portable lifting tool, including:

The bracket includes a vertical beam and a first cross beam, the top of the vertical beam is provided with a first connecting portion, and one end of the first cross beam is vertically connected to a position close to the top of the vertical beam;

The hoisting structure includes a support, a boom and a winch assembly, the bottom of the support is provided with a second connection part, the second connection part is detachably connected to the first connection part, and the boom is connected to the first connection part. The top of the support is connected, the winch assembly is connected to the top of the support, the rope of the winch assembly extends to the boom and hangs the hook vertically downward;

Bolt clamps, the number of the bolt clamps is at least two, and the bolt clamps are used to clamp the vertical beam and/or the first cross beam on the capacitor frame, so as to limit the support relative to the capacitor Architectural movement.

The purpose of the utility model and the solution to its technical problems can also be further realized by adopting the following technical measures.

Optionally, in the aforementioned portable lifting tool, wherein the vertical beam includes a first side plate and a second side plate both of which are elongated, one long side of the first side plate is connected to a side of the second side plate One long side is vertically connected, and the first connecting part is connected to one end of the length direction of the first side plate and the second side plate;

The first beam includes a third side plate and a fourth side plate both of which are elongated, and a long side of the third side plate is vertically connected to a long side of the fourth side plate;

Wherein, one end in the length direction of the third side plate is connected to a side of the first side plate away from the second side plate, and the width extension direction of the fourth side plate is extended with the width of the second side plate. same direction.

Optionally, the aforementioned portable lifting tool, wherein the bracket further includes: a second crossbeam, the structure of the second crossbeam is the same as that of the first crossbeam, and one end of the second crossbeam is vertically connected to the vertical beam ;

Wherein, the connection position between the second beam and the vertical beam is at the same height as the connection position between the first beam and the vertical beam, the second beam is perpendicular to the first beam, and the first beam is perpendicular to the first beam. Two beams can be clamped on the capacitor frame through the bolt clamps.

Optionally, the aforementioned portable lifting tool, wherein the first connection part includes a cylinder and a pressure bearing, the first end of the cylinder is connected to the top of the vertical beam, and the pressure bearing is arranged on the cylinder within the barrel and at the second end of the barrel;

The second connection part is a stepped shaft, and the stepped shaft includes a first-stage shaft section and a second-stage shaft section with decreasing shaft diameters, one end of the first-stage shaft section is connected to the bottom of the support , the other end of the first-stage shaft section is connected to one end of the second-stage shaft section, the other end of the second-stage shaft section is detachably plugged into the second end of the cylinder, and is connected to the The above-mentioned pressure bearing is rotationally connected.

Optionally, in the aforementioned portable hoisting tool, wherein the support is column-shaped, the first end of the boom is connected to the side wall of the support near the top, and the main part of the winch assembly is connected to the support The side of the boom facing away from the connection is connected.

Optionally, in the aforementioned portable hoisting tool, wherein the winch assembly further includes a mounting plate, the mounting plate is connected to the top end of the support and extends in a direction away from the extension of the boom, and the winch assembly The host part is connected under the mounting plate.

Optionally, the aforementioned portable hoisting tool, wherein the hoisting structure further includes:

A drag cable, one end of the drag cable is connected to the top of the suspended end of the boom, and the other end of the drag cable is connected to the top of the support.

Optionally, the aforementioned portable lifting tool, wherein the boom is a hollow pipe, and the lower side of the boom is provided with an opening along the length direction of the boom to form a chute;

The rope of the winch assembly extends into the inside of the boom through the support, and extends to the cantilever end of the boom to connect with the cantilever end of the boom;

The rope is connected to the hook through a block of pulleys, and the block of pulleys is slidably connected to the chute.

Optionally, the aforementioned portable hoisting tool, wherein the block of pulleys includes a first pulley and a second pulley that are slidably connected inside the boom, and a third pulley that is connected to the hook;

Wherein, the third pulley is located below the gap between the first pulley and the second pulley, and the rope is wound around the top of the first pulley, the bottom of the third pulley and the top of the second pulley in turn.

Optionally, the aforementioned portable hoisting tool, wherein the hook is a hook with a lock.

Optionally, the aforementioned portable lifting tool also includes:

a controller, the controller is connected to the host part of the winch assembly through a wire;

Wherein, the wire is provided with a traction rope for pulling the winch assembly to drive the hoisting structure to rotate.

With the above technical solution, the utility model portable lifting tool has at least the following advantages:

The portable lifting tool provided by the embodiment of the utility model mainly includes three parts, namely a bracket, a lifting structure and a bolt clamp. When in use, the bracket is directly fixed on the structure of the capacitor through the bolt clamp, and then the lifting structure and The support can be rotated and connected, which is very convenient to install; and the hoisting structure and the support are rotatably connected, which can realize 360-degree rotation, that is, 360-degree hoisting work can be realized; finally, the portable The components of the hoisting tool are integrated, which is more convenient to carry and assemble more quickly than the scattered temporary pendant components, which can effectively save manpower.

The above description is only an overview of the technical solution of the utility model. In order to understand the technical means of the utility model more clearly and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with accompanying drawings. back.

Description of drawings

The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

Fig. 1 schematically shows a structural schematic diagram of a first viewing angle of a portable lifting tool;

Fig. 2 schematically shows a structural schematic view of a portable lifting tool in a second viewing angle;

Fig. 3 schematically shows a first view structural diagram of a portable hoisting tool installed on a capacitor frame;

Fig. 4 schematically shows a second perspective structure schematic diagram of a portable hoisting tool installed on the capacitor frame;

Fig. 5 schematically shows a schematic structural view of a bracket of a portable lifting tool;

Fig. 6 schematically shows a schematic diagram of a rope connection structure of a winch assembly of a hoisting structure of a portable hoisting tool.

The labels in the figure are:

Bracket 1, vertical beam 11, first side plate 111, second side plate 112, first beam 12, third side plate 121, fourth side plate 122, first connecting part 13, second beam 14, hoisting structure 2 , support 21, boom 22, winch assembly 23, rope 231, hook 232, mounting plate 233, pulley block 234, main engine part 235, first pulley 2341, second pulley 2342, third pulley 2343, second connection part 24. Pull cable 25. Bolt clamp 3. Capacitor structure 4.

Detailed ways

The utility model is just for solving the above-mentioned technical problem.

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

It should be noted that, unless otherwise specified, technical terms or scientific terms used in this application shall have the usual meanings understood by those skilled in the art to which this application belongs.

As shown in Fig. 1-Fig. 4, a portable hoisting tool proposed in the first embodiment of the present invention includes: a bracket 1, a hoisting structure 2 and a bolt fixture 3;

The support 1 includes a vertical beam 11 and a first cross beam 12, the top of the vertical beam 11 is provided with a first connecting portion 13, and one end of the first cross beam 12 is vertically connected with the position near the top of the vertical beam 11;

The hoisting structure 2 includes a support 21, a boom 22 and a winch assembly 23, the bottom of the support 21 is provided with a second connection part 24, and the second connection part 24 and the first connection part 13 are detachably rotatable connected, the boom 22 is connected to the top of the support 21, the winch assembly 23 is connected to the top of the support 21, and the rope 231 of the winch assembly 23 extends to the boom 22 and vertically Lower the hanging hook 232;

The number of the bolt clamps 3 is at least two, and the bolt clamps 3 are used to clamp the vertical beam 11 and/or the first beam 12 on the capacitor frame 4, so as to limit the support 1 relative to the capacitor frame 4. The movement of the capacitor architecture 4 is described.

Specifically, the portable hoisting tool provided in this embodiment is used to be installed at a high point (such as the capacitor structure 4), and then hoist heavy objects (such as a capacitor), so combined with the actual working state, the portable hoisting tool has a clear top and the bottom, that is, the highest part in the vertical direction is the top, and vice versa is the bottom. Therefore, in order to describe the structure of the portable lifting tool, the concepts of top, bottom, and up and down are directly used.

The first beam 12 and the vertical beam 11 of the bracket 1 can be directly made of metal profiles with a certain strength, such as carbon steel profiles, but not limited to carbon steel profiles. The connection between the first beam 12 and the vertical beam 11 is preferably welded to ensure the connection strength. The vertical connection structure of the vertical beam 11 and the first cross beam 12 can be well matched with the right-angle position of the capacitor frame 4 , and can be easily clamped by the bolt fixture 3 . The first connecting part 13 provided on the top of the vertical beam 11 can be arranged on the top of the vertical beam 11, can be a simple sleeve structure, or can be a socket structure with bearings, so that it can be connected with the support of the lifting structure 2 21 turn to connect.

The support 21 of the hoisting structure 2 is subject to being able to support the boom 22 and the winch assembly 23 , and the specific structure may not be limited, for example, it may be a column-shaped support structure. The second connecting portion 24 at the bottom of the support 21 is based on the detachable rotational connection with the first connecting portion 13 , and may be a cylindrical structure.

Winch assembly 23 comprises components such as main frame part 235, rope 231, suspension hook 232, after winch is connected with bearing 21, rope 231 is extended to boom 22, and hangs suspension hook 232, by the main frame part 235 of winch assembly 23 can The expansion and contraction of the rope 231 is controlled, and then the lowering or pulling up of the hook 232 is realized, and then used for hoisting objects.

Bolt fixture 3 includes two parts of U-shaped frame and abutment bolt, and the abutment bolt is threadedly connected with the side wall of U-shaped frame, and the abutment bolt extends through the side wall of U-shaped frame to the middle part of U-shaped frame Space, when using the bolt fixture 3, the U-shaped frame can accommodate the object to be clamped in the middle space of the U-shaped frame, and then hold the object against the object by screwing the abutment bolt and clamp it on the unfinished part of the U-shaped frame. Attach the jack bolts to one side wall. In this way, in specific use, the bracket 1 can be clamped on the capacitor frame 4 by the bolt fixture 3 , and the number of bolt fixtures 3 used can be two, three or more. Wherein, the structure of the bolt fixture 3 is known to technical personnel and can be obtained through procurement.

The portable lifting tool provided by the embodiment of the utility model mainly includes three parts, namely a support 1, a lifting structure 2 and a bolt clamp 3. When in use, the support 1 is directly fixed on the structure of the capacitor through the bolt clamp 3. Then the hoisting structure 2 and the bracket 1 can be rotated and connected, which is very convenient to install; and the hoisting structure 2 and the bracket 1 are connected by rotation, which can realize a 360-degree rotation, that is, a 360-degree hoisting work can be realized; finally, The components that make up the portable lifting tool provided by the embodiment of the utility model are integrated, which is more convenient to carry and assemble more quickly than scattered temporary pendant components, which can effectively save manpower.

As shown in Fig. 5, in a specific implementation, wherein the vertical beam 11 includes a first side plate 111 and a second side plate 112, both of which are elongated, one long side of the first side plate 111 is connected to the A long side of the second side plate 112 is vertically connected, and the first connecting portion 13 is connected to one end of the length direction of the first side plate 111 and the second side plate 112; The strip-shaped third side plate 121 and the fourth side plate 122, a long side of the third side plate 121 is vertically connected with a long side of the fourth side plate 122; wherein, the third side plate 121 One end in the length direction of the first side plate 111 is connected to a side of the first side plate 111 away from the second side plate 112 , and the width extension direction of the fourth side plate 122 is the same as the width extension direction of the second side plate 112 .

Specifically, both the vertical beam 11 and the first cross beam 12 can be made of angle steel, and the two side plates of the angle steel are respectively the first side plate 111 and the second side plate 112 mentioned above, or the third side plate 121 or the fourth side plate 122 . It should be noted that the vertical beam 11 and the first cross beam 12 of the angle steel structure need to be connected according to the above requirements, that is, while the two are vertically connected, it is necessary to ensure that the third side plate 121 is on the same plane as the first side plate 111, and The width extension direction of the fourth side plate 122 is the same as that of the second side plate 112, so that the bracket 1 formed in this way has an angle steel accommodation space on the same side, and the bracket 1 can be buckled at the right angle position of the capacitor frame 4, and then clamped by bolts Tool 3 clamping connection. Further, rational utilization of the capacitor structure 4 is realized, and the weight of the bracket 1 is reduced, which is further convenient for carrying and installation.

Further, the bracket 1 also includes a second crossbeam 14, the structure of the second crossbeam 14 is the same as that of the first crossbeam 12, and one end of the second crossbeam 14 is vertically connected with the vertical beam 11; wherein, the The connection position of the second beam 14 and the vertical beam 11 is at the same height as the connection position of the first beam 12 and the vertical beam 11, and the second beam 14 is perpendicular to the first beam 12, so The second beam 14 can be clamped on the capacitor frame 4 through the bolt fixture 3 .

Specifically, the second beam 14 has the same structure as the first beam 12, that is, the second beam 14 can also be made of angle steel, and the two side plates of the second beam 14 are defined as the fifth side plate and the sixth side plate, One end of the fifth side plate in the length direction is connected to the side edge of the second side plate 112 away from the first side plate 111, and the fifth side plate and the second side plate 112 are in the same plane, and the width extension direction of the sixth side plate It is the same as the extending direction of the width of the first side plate 111 . The bracket 1 formed by the vertical beam 11, the first cross beam 12 and the second cross beam 14 can be buckled at the right angle position of the capacitor frame 4, and then clamped and connected by the bolt clamp 3, so that when the vertical beam 11, the first cross beam 12 and the second beam 14 are clamped on the capacitor frame 4, which can realize the limitation of all degrees of freedom in the three-dimensional space of the bracket 1, ensure that the bracket 1 cannot move relative to the capacitor frame 4, and ensure the stability and safety during use .

In a specific implementation, the first connecting part 13 includes a cylinder and a pressure bearing, the first end of the cylinder is connected to the top of the vertical beam 11, the pressure bearing is arranged in the cylinder and at the second end of the barrel;

The second connecting part 24 is a stepped shaft, and the stepped shaft includes a first-stage shaft section and a second-stage shaft section with decreasing shaft diameters, one end of the first-stage shaft section is connected to the support 21 The bottom is connected, the other end of the first-stage shaft section is connected to one end of the second-stage shaft section, the other end of the second-stage shaft section is detachably plugged into the second end of the cylinder, and It is rotatably connected with the pressure bearing.

Specifically, the detachable cooperation between the cylinder and the stepped shaft achieves the effect of rapid assembly, and at the same time, the structure is simple and easy to process, reducing the cost of portable lifting tools. The setting of the pressure bearing can ensure the smooth rotation between the support 21 and the bracket 1, so that the staff can operate the portable lifting tool more labor-saving.

As shown in Fig. 1-Fig. 4 and Fig. 6, in a specific implementation, wherein the support 21 is columnar, the first end of the boom 22 is connected to the side wall near the top of the support 21, the The main body part 235 of the winch assembly 23 is connected with the side of the support 21 facing away from the boom 22 .

Specifically, the support 21 can be a hollow cylinder, which can not only ensure the structural strength, but also effectively reduce the weight, so that it is easy to carry. And the host part 235 of the boom 22 and the winch assembly 23 is arranged on opposite sides of the support 21, then the host part 235 of the winch assembly 23 with a certain weight can be used as a counterweight without adding additional counterweight.

Wherein, the length of the boom 22 cannot be too large, and the preferred length is 1.3-1.8 meters, such as 1.5 meters.

Further, the winch assembly 23 also includes a mounting plate 233, the mounting plate 233 is connected to the top end of the support 21, and extends in a direction away from the extension of the boom 22, the main part of the winch assembly 23 235 is connected under the mounting plate 233 .

Specifically, since the winch assembly 23 has a certain volume, it is inconvenient to be directly connected to the columnar support 21 , so a mounting plate 233 is added to connect the winch assembly 23 to the support 21 through the mounting plate 233 . Wherein, the connection between the mounting plate 233 and the support 21 can be welded or bolted, and the mounting plate 233 and the host part 235 of the winch assembly 23 are preferably bolted for subsequent disassembly and maintenance.

As shown in Figures 1-4, in specific implementation, the hoisting structure 2 further includes: a cable 25, one end of the cable 25 is connected to the top of the suspension end of the boom 22, and the cable The other end of the cable 25 is connected to the top of the support 21 .

Specifically, through the setting of the cable 25, a stable triangular structure can be formed between the support 21, the boom 22 and the cable 25, the overall strength of the hoisting structure 2 can be improved, and the pulling force can be increased for the boom 22 at the same time, so that The jib 22 can lift relatively heavy objects.

As shown in Figure 6, in specific implementation, wherein the boom 22 is a hollow pipe body, and the underside of the boom 22 is provided with an opening along the length direction of the boom 22 to form a chute; The rope 231 of the winch assembly 23 passes through the support 21 and extends into the inside of the boom 22, and extends to the boom end of the boom 22 to connect with the boom end of the boom 22; Connected with the hook 232, the pulley block 234 is slidably connected with the chute.

Further, the pulley block 234 includes a first pulley 2341 and a second pulley 2342 that are slidably connected inside the boom 22 side by side, and a third pulley 2343 connected with the hook 232; wherein, the third The pulley 2343 is located below the gap between the first pulley 2341 and the second pulley 2342, and the rope 231 passes around the top of the first pulley 2341, the bottom of the third pulley 2343 and the top of the second pulley 2342 in turn.

Specifically, when the suspension hook 232 needs to be lowered, the main unit 235 of the winch assembly 23 controls the rope 231 to output a certain length. Extend, and then realize the lowering of the suspension hook 232, otherwise the lifting of the suspension hook 232 can be realized, that is, the weight connected to the suspension hook 232 can be lifted. Wherein, the first pulley 2341 and the second pulley 2342 can slide in the chute of the boom 22, and move back and forth along the length direction of the boom 22 together with the third pulley 2343 and the hook 232, thereby realizing the adjustment of the hook 232. position adjustment.

In a specific implementation, the hook 232 is a hook 232 with a lock.

Specifically, the hook 232 can be obtained through procurement. The hook 232 with a lock is a common type of hook 232. The setting of the lock can prevent the hook 232 from decoupling the rope 231 connecting the heavy object when lifting the heavy object.

In specific implementation, the portable hoisting tool provided in this embodiment also includes:

A controller, the controller is connected with the main part 235 of the winch assembly 23 through a wire; wherein, the wire is attached with a traction rope for pulling the winch assembly 23 to drive the hoisting structure 2 to rotate.

Specifically, the controller is a controller that controls the main unit 235 of the winch assembly 23 to retract and unwind the rope 231. By connecting with wires, the wires can be set to a certain length and operated with the staff on the ground or at a low point. The traction rope can be arranged in parallel with the wire, or the two can be intertwined. The setting of the traction rope can be convenient for the staff to operate the controller while pulling the traction rope to make the hoisting structure 2 rotate relative to the support 1 to hoist heavy objects (such as capacitors) at different positions, so as to facilitate the operation of the staff.

In addition, the controller can also be a wireless controller, that is, there is wireless communication between the controller and the host part of the winch assembly, such a wireless control method can also effectively facilitate the operation of the staff.

It can be understood that related features in the above devices can refer to each other. In addition, "first", "second" and so on in the above embodiments are used to distinguish each embodiment, and do not represent the advantages and disadvantages of each embodiment.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (10)

1. A portable lifting tool, characterized in that, comprising: The bracket includes a vertical beam and a first cross beam, the top of the vertical beam is provided with a first connecting portion, and one end of the first cross beam is vertically connected to a position close to the top of the vertical beam; The hoisting structure includes a support, a boom and a winch assembly, the bottom of the support is provided with a second connection part, the second connection part is detachably connected to the first connection part, and the boom is connected to the first connection part. The top of the support is connected, the winch assembly is connected to the top of the support, the rope of the winch assembly extends to the boom and hangs the hook vertically downward; Bolt clamps, the number of the bolt clamps is at least two, and the bolt clamps are used to clamp the vertical beam and/or the first cross beam on the capacitor frame, so as to limit the support relative to the capacitor Architectural movement. 2. The portable lifting tool according to claim 1, characterized in that, The vertical beam includes a first side plate and a second side plate that are all elongated, a long side of the first side plate is vertically connected to a long side of the second side plate, and the first connection The part is connected to one end of the length direction of the first side plate and the second side plate; The first beam includes a third side plate and a fourth side plate both of which are elongated, and a long side of the third side plate is vertically connected to a long side of the fourth side plate; Wherein, one end in the length direction of the third side plate is connected to a side of the first side plate away from the second side plate, and the width extension direction of the fourth side plate is extended with the width of the second side plate. same direction. 3. The portable lifting tool according to claim 2, wherein the support further comprises: a second crossbeam, the structure of the second crossbeam is the same as that of the first crossbeam, and one end of the second crossbeam is vertically connected to the vertical beam; Wherein, the connection position between the second beam and the vertical beam is at the same height as the connection position between the first beam and the vertical beam, the second beam is perpendicular to the first beam, and the first beam is perpendicular to the first beam. Two beams can be clamped on the capacitor frame through the bolt clamps. 4. The portable lifting tool according to any one of claims 1-3, characterized in that, The first connection part includes a cylinder and a pressure bearing, the first end of the cylinder is connected to the top of the vertical beam, and the pressure bearing is arranged in the cylinder and located at the second end of the cylinder. end; The second connection part is a stepped shaft, and the stepped shaft includes a first-stage shaft section and a second-stage shaft section with decreasing shaft diameters, one end of the first-stage shaft section is connected to the bottom of the support , the other end of the first-stage shaft section is connected to one end of the second-stage shaft section, the other end of the second-stage shaft section is detachably plugged into the second end of the cylinder, and is connected to the The above-mentioned pressure bearing is rotationally connected. 5. The portable lifting tool according to claim 1, characterized in that, The support is column-shaped, the first end of the boom is connected to the side wall of the support near the top, and the main part of the winch assembly is connected to the side of the support that is away from the boom. . 6. The portable lifting tool according to claim 5, characterized in that, The winch assembly also includes a mounting plate connected to the top of the support and extending in a direction away from the extension of the boom, and the main unit of the winch assembly is connected below the mounting plate. 7. The portable lifting tool according to claim 6, wherein the lifting structure further comprises: A drag cable, one end of the drag cable is connected to the top of the suspended end of the boom, and the other end of the drag cable is connected to the top of the support. 8. The portable lifting tool according to any one of claims 5-7, characterized in that, The boom is a hollow pipe, and the lower side of the boom is provided with an opening along the length direction of the boom to form a chute; The rope of the winch assembly extends into the inside of the boom through the support, and extends to the cantilever end of the boom to connect with the cantilever end of the boom; The rope is connected to the hook through a block of pulleys, and the block of pulleys is slidably connected to the chute. 9. The portable lifting tool according to claim 8, characterized in that, The block of pulleys includes a first pulley and a second pulley that are slidably connected to the inside of the boom, and a third pulley that is connected to the hook; Wherein, the third pulley is located below the gap between the first pulley and the second pulley, and the rope is wound around the top of the first pulley, the bottom of the third pulley and the top of the second pulley in turn. 10. The portable lifting tool according to claim 1, characterized in that, The hook is a hook with a lock.

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