Portable magnetic base crane

Abstract

The utility model provides a portable magnetic base crane which comprises a base, a magnetic base, a vertical rod structure, a suspension arm structure and a winch, and the magnetic base is arranged on the base; the vertical rod structure comprises a vertical rod bottom rod and an upper rotating column, the bottom of the vertical rod bottom rod is connected with the base, and the top end is rotationally connected with the upper rotating column; the suspension arm structure is transversely arranged and fixed on the upper rotating column, and the length of the suspension arm structure is adjustable; a lifting hook is arranged at the free end of the winch steel wire rope, a pulley matched with the winch steel wire rope is arranged on the suspension arm structure, the winch is close to one end of the suspension arm structure, and the other end of the suspension arm structure is a suspension position of the lifting hook. The crane is quickly fixed (removed) on the steel structure surface of the equipment by using the magnetic base, so that the crane can conveniently move at any time; the requirement for position movement of the hanging piece is met, and the overall working efficiency is improved; the device is designed to be in a module splicing mode and can be assembled according to on-site working conditions.

Description

Technical Field

[0001] The present application belongs to the technical field of hoisting equipment, and in particular, relates to a portable magnetic base hoist. Background Art

[0002] There are a large number of lifting equipments arranged in the port terminal, such as gantry cranes, bridge gantry cranes, ship loaders, ship unloaders, stackers and reclaimers, belt conveyors and other equipments, most of which are operated outdoors, and the height of the equipments can reach more than 30-40 meters. When replacing the pulleys, wheels and tracks of the upper parts of the equipments (the weight of the parts is generally less than 1t), the lifting equipments must be used for lifting. There are currently two ways of lifting: one is to use a large crane with a boom of more than 40m to cooperate with the lifting, and the other is to set up a steel structure lifting gantry at the replacement place of the upper parts of the equipments and use a hand chain hoist for lifting.

[0003] Large cranes are suitable for lifting at multiple locations, but are limited by the location of the lifting points, and there are problems such as difficulty in standing on the ground or the crane boom being unable to reach the maintenance location. When a steel structure lifting gantry is set up at the location where the upper parts of the equipment are replaced, if the lifting point needs to be replaced multiple times, the temporarily welded steel structure gantry must be moved, which is very cumbersome, time-consuming and labor-intensive, affects maintenance efficiency and increases the cost of using the crane.

[0004] How to conveniently and quickly hoist and replace equipment components arranged at high altitudes to ensure that the terminal equipment can be put into production as soon as possible requires an urgent need to design and manufacture a lightweight, easy-to-move lifting tool that can lift weights below 1t to meet on-site construction requirements. Utility Model Content

[0005] The purpose of the present application is to provide a portable magnetic base hoist to solve the technical problem of the lack of a conveniently movable hoist in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a portable magnetic base crane, including: a base, a magnetic base, a pole structure, an arm structure and a winch, wherein: the magnetic base is arranged on the base, and when the magnetic base is closed, the base can be fixed on the equipment through adsorption by the magnetic base; the pole structure includes a column bottom rod and an upper rotating column, the bottom of the column bottom rod is connected to the base, and the top is rotatably connected to the upper rotating column; the arm structure is horizontally arranged and fixed on the upper rotating column, and the length of the arm structure is adjustable; the free end of the winch wire rope is provided with a hook, and the arm structure is provided with a pulley matching the winch wire rope, and the winch is close to one end of the arm structure and the other end of the arm structure is the hanging position of the hook.

[0007] Optionally, a mounting hole is provided on the base, and the magnetic seat includes a force seat lower part and a force seat upper part connected to the force seat lower part, a step is formed between the force seat lower part and the force seat upper part, the force seat lower part is inserted into the mounting hole, and the force seat upper part is supported on the top surface of the base.

[0008] Optionally, the base is a plate-like structure, a columnar portion is provided in the middle of the base, the column bottom rod is inserted into the columnar portion and threadedly connected to the columnar portion; the magnetic base is provided on both sides of the columnar portion.

[0009] Optionally, a handle is provided on the circumferential side wall of the column bottom rod, and the handle is detachably connected to the column bottom rod.

[0010] Optionally, an upper pull ring is provided on the bottom rod of the column, a base pull ring is provided on the base, tightening ropes are provided on both the upper pull ring and the base pull ring, and the tightening rope of the upper pull ring and the tightening rope of the base pull ring are connected by a basket screw.

[0011] Optionally, the column bottom rod and the upper rotating column are rotatably connected via a bearing.

[0012] Optionally, a U-shaped bayonet plate is provided on the top of the upright structure, the support arm is inserted into the U-shaped bayonet plate, and the support arm and the U-shaped bayonet plate are detachably connected via bolts.

[0013] Optionally, the boom structure includes a supporting arm, a fixed arm, a telescopic arm and a telescopic adjustment structure, the supporting arm is vertically arranged and connected to the vertical pole structure, the fixed arm is transversely arranged and fixed on the supporting arm, the telescopic arm is transversely arranged and inserted into the fixed arm, the telescopic adjustment structure is connected to the telescopic arm to adjust the extended length of the telescopic arm, the winch is arranged on the fixed arm, and the pulley is arranged at the top of the support arm and the free end of the telescopic arm.

[0014] Optionally, the telescopic adjustment structure includes a turntable and a screw rod, the screw rod is arranged horizontally and passes through the fixed arm and is threadedly connected to the telescopic arm, the turntable is arranged at one end of the fixed arm away from the telescopic arm and is connected to the screw rod, the fixed arm and the telescopic arm are both square tubes, and rotating the turntable can drive the telescopic arm to extend into or out of the fixed arm.

[0015] Optionally, a pull rod is provided between the support arm and the fixed arm.

[0016] The beneficial effects of the present application are as follows: compared with the prior art, the portable magnetic base crane of the present application meets the requirements of convenient handling and rapid movement. By using a magnetic base, a small crane can be quickly fixed (removed) on the steel structure surface of the equipment, making it convenient for the crane to be moved at any time; the boom can also be extended and rotated to meet the movement of the hoisted objects and meet the requirements of maintenance conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of a portable magnetic base crane provided in an embodiment of the present application;

[0019] Figure 2 An exploded schematic diagram of a portable magnetic base crane provided in an embodiment of the present application;

[0020] Figure 3 An exploded schematic diagram of a base and a magnetic base provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of the structure of the magnetic base provided in an embodiment of the present application;

[0022] Figure 5 An exploded schematic diagram of a pole structure provided in an embodiment of the present application;

[0023] Figure 6 An exploded schematic diagram of a boom structure provided in an embodiment of the present application;

[0024] Figure 7 A schematic diagram of the structure of the screw rod and the telescopic arm provided in an embodiment of the present application.

[0025] Among them, the reference numerals in the figure are:

[0026] 1-base; 2-magnetic base; 3-pole structure; 4-arm structure; 5-winch;

[0027] 11-mounting hole; 12-columnar portion;

[0028] 21- upper part of the force seat; 22- lower part of the force seat; 23- switch;

[0029] 31-column bottom rod; 32-upper rotating column; 33-handle seat; 34-handle; 35-U-shaped bayonet plate; 36-bolt; 37-nut; 38-upper end pull ring; 39-base pull ring; 310-tightening rope; 311-basket screw; 312-through hole;

[0030] 41-support arm; 42-fixed arm; 43-telescopic arm; 44-winch base; 45-turntable; 46-screw rod; 47-pulley; 48-pull rod; 49-support arm through hole;

[0031] 51-wire rope; 52-hook. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings. The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, but cannot be understood as limiting the present application.

[0033] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "top", "bottom", "inside", "outside", "up", "down", "left", "right", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In this application, unless otherwise clearly specified and limited, the terms "connected", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0036] It should be noted that, in this application, words such as "in one embodiment", "exemplarily", "for example", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described in this application as "in one embodiment", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in one embodiment", "exemplarily", "for example", etc. is intended to present related concepts in a specific way.

[0037] See also Figure 1-Figure 7 The present embodiment provides a portable magnetic base crane, comprising a base 1, a magnetic base 2, a pole structure 3, an arm structure 4 and a winch 5, wherein: the magnetic base 2 is arranged on the base 1, and when the magnetic base 2 is closed, the base 1 can be fixed on the equipment by adsorption of the magnetic base 2; the pole structure 3 comprises a column bottom rod 31 and an upper rotating column 32, the bottom of the column bottom rod 31 is connected to the base 1, and the top is rotatably connected to the upper rotating column 32; the arm structure 4 is horizontally arranged and fixed on the upper rotating column 32, and the length of the arm structure 4 is adjustable; a hook 52 is arranged at the free end of the wire rope 51 of the winch 5, and a pulley 47 matching the wire rope 51 of the winch 5 is arranged on the arm structure 4, and one end of the winch 5 close to the arm structure 4 and the other end of the arm structure 4 are the hanging positions of the hook 52.

[0038] When the switch 23 of the magnetic base 2 is closed, the magnetic base 2 tightly adsorbs the base 1 of the crane and the steel structure surface of the equipment being repaired; when the switch 23 of the magnetic base 2 is disconnected, the suction between the base 1 of the crane and the steel structure surface of the equipment being repaired is released. By using the magnetic base 2, the small crane can be quickly fixed (removed) on the steel structure surface of the equipment, which makes it convenient to move the crane at any time.

[0039] The column bottom rod 31 is rotatably connected to the upper rotating column 32 to realize the rotation of the boom structure 4; at the same time, the length of the boom structure 4 is adjustable to meet the requirement that the hanging parts can be moved to different positions during on-site maintenance operations.

[0040] In one embodiment, see Figure 3 and Figure 4 A mounting hole 11 is provided on the base 1, and the magnetic base 2 includes a force base lower part 22 and a force base upper part 21 connected to the force base lower part 22, a step is formed between the force base lower part 22 and the force base upper part 21, the force base lower part 22 is inserted into the mounting hole 11, and the force base upper part 21 is supported on the top surface of the base 1.

[0041] The magnetic base 2 is designed as a stepped step, and the lower part 22 of the force base matches the mounting hole 11 of the base 1. After the magnetic base 2 is placed in the mounting hole 11 of the base 1, the upper part 21 of the force base is supported on the base 1 of the crane. When the switch 23 of the magnetic base 2 is closed, the magnetic base 2 is magnetic, the upper part 21 of the force base 2 presses the base 1 of the crane, and the lower part 22 of the force base is tightly adsorbed as a whole with the steel structure surface of the equipment to be repaired, so as to fix the base 1 on the steel structure of the equipment to be repaired. The magnetic base 2 provided in this embodiment has a simple connection structure with the base 1, and the base 1 and the magnetic base 2 are easy to disassemble and assemble.

[0042] Specifically, the weight of the magnetic base 2 can be set to about 1 t to facilitate rapid transportation and movement.

[0043] The shape of the mounting hole 11 of the base 1 matches the shape of the lower portion 22 of the force seat. The mounting hole 11 is preferably a square hole. Of course, the shape of the mounting hole 11 is not limited to a square.

[0044] In one embodiment, see Figure 3 The base 1 is a plate-shaped structure, a columnar portion 12 is arranged in the middle of the base 1 , a column bottom rod 31 is inserted into the columnar portion 12 and is threadedly connected to the columnar portion 12 ; magnetic seats 2 are arranged on both sides of the columnar portion 12 .

[0045] The base 1 is detachably connected to the column bottom rod 31 through threads, which is convenient for disassembly and assembly, so that the crane is designed as a modular splicing type.

[0046] Specifically, the base 1 can be made of a 20mm thick steel plate. A columnar portion 12 with a height of 80mm is designed in the middle of the base 1. An M100 screw hole is provided in the columnar portion 12. Two mounting holes 11 are designed on both sides of the base 1. Each mounting hole 11 corresponds to a magnetic base 2. The magnetic base 2 is symmetrically arranged and stably fixed on the steel structure of the equipment to be repaired by the base 1. As for the length and width of the base 1, it is sufficient to meet the arrangement of the two mounting holes 11 and the columnar portion 12, so as to reduce the weight of the base 1 and facilitate quick handling and movement.

[0047] In one embodiment, see Figure 5 A handle 34 is provided on the circumferential side wall of the column bottom rod 31 , and the handle 34 is detachably connected to the column bottom rod 31 .

[0048] The handle 34 is designed to screw the column bottom rod 31 into the crane base 1 to facilitate force application.

[0049] Specifically, see Figure 5 A handle seat 33 is provided on the circumferential side wall of the column bottom rod 31, and an internal thread is provided in the handle seat 33. The handle 34 is inserted into the handle seat 33 and threadedly connected with the handle seat 33. The handle seat 33 and the handle 34 are threadedly connected, which is convenient for disassembly and assembly.

[0050] Furthermore, the handle seat 33 can be provided with an M20 internal thread and equipped with a 300mm*20mm handle 34, and the handle 34 head is processed with an M20 external thread.

[0051] Furthermore, three handle seats 33 are designed at the lower position of the column bottom rod 31 . The three handle seats 33 are evenly spaced along the circumferential direction of the column bottom rod 31 , and each handle seat 33 corresponds to a handle 34 .

[0052] In one embodiment, see Figure 2 An upper pull ring 38 is provided on the bottom rod 31 of the column, and a base pull ring 39 is provided on the base 1. Tightening ropes 310 are provided on both the upper pull ring 38 and the base pull ring 39, and the tightening rope 310 of the upper pull ring 38 and the tightening rope 310 of the base pull ring 39 are connected by a basket screw 311.

[0053] In this embodiment, in order to ensure the stability of the column bottom rod 31 , the tightening rope 310 can be tightened by rotating the basket screw 311 .

[0054] Specifically, preferably, two upper pull rings 38 are symmetrically arranged on the column bottom rod 31 , and two base pull rings 39 are symmetrically arranged on the base 1 , and the tightening ropes 310 of the upper pull ring 38 and the base pull ring 39 on the same side are connected by a basket screw 311 .

[0055] Specifically, the upper end pull ring 38 can be rotatably connected to the column bottom rod 31 through a connecting seat, and the base pull ring 39 can be rotatably connected to the base 1 through a connecting seat.

[0056] In one embodiment, the column bottom rod 31 and the upper rotating column 32 are rotatably connected via a bearing.

[0057] See also Figure 5 , schematically shows the column bottom rod 31 and the upper rotating column 32. The column bottom rod 31 and the upper rotating column 32 are rotatably connected through a bearing, and the connection structure is simple.

[0058] Specifically, the column bottom rod 31 can use a seamless steel pipe with a diameter of 114*16mm, and the length can be selected between 1m-1.8m. The bottom of the column bottom rod 31 is designed with an M100mm, 150mm long external thread, which is connected with the base 1.

[0059] In one embodiment, see Figure 5 A U-shaped bayonet plate 35 is provided on the top of the upright structure 3 , the boom structure 4 is inserted into the U-shaped bayonet plate 35 , and the boom structure 4 and the U-shaped bayonet plate 35 are detachably connected via bolts 36 .

[0060] The upright structure 3 and the boom structure 4 are detachably connected by bolts 36, and are easy to assemble and disassemble, so that the crane can be designed as a modular splicing type.

[0061] Specifically, see Figure 5 The opening of the U-shaped bayonet plate 35 faces upward. The U-shaped bayonet plate 35 includes two vertical plates and a horizontal plate connecting the two vertical plates. The two vertical plates are provided with through holes 312. Figure 6 A support arm through hole 49 is provided on the boom structure 4, and the bolt 36 passes through a through hole 312 on a vertical plate, the support arm through hole 49 and a through hole 312 on another vertical plate in sequence, and the boom structure 4 is fixed to the upright structure 3 by screwing the nut 37 on the bolt 36.

[0062] Furthermore, the upright pole structure 3 and the boom structure 4 are preferably connected by two bolts 36 . Of course, the number of the connecting bolts 36 between the upright pole structure 3 and the boom structure 4 is not limited to only two.

[0063] In one embodiment, see Figure 6 The boom structure 4 includes a supporting arm 41, a fixed arm 42, a telescopic arm 43 and a telescopic adjustment structure. The supporting arm 41 is vertically arranged and connected to the upright structure 3, the fixed arm 42 is horizontally arranged and fixed on the supporting arm 41, the telescopic arm 43 is horizontally arranged and inserted into the fixed arm 42, the telescopic adjustment structure is connected to the telescopic arm 43 to adjust the extended length of the telescopic arm 43, a winch 5 is arranged on the fixed arm 42, and pulleys 47 are arranged at the top of the supporting arm 41 and the free end of the telescopic arm 43.

[0064] The overall structure of the boom is simple. In addition, pulleys 47 are designed at the front end of the telescopic arm 43 and the top of the support arm 41 to facilitate the positioning and up and down movement of the lifting wire rope 51.

[0065] Specifically, a winch 5 with a lifting capacity of 1 t can be designed and installed on the fixed arm 42, and the winch 5 can be quickly connected to the winch base 44 on the fixed arm 42. In addition, to ensure that the winch 5 is stressed on the winch base 44, see Figure 6 The winch base 44 is vertically mounted on the fixed arm 42. The wire rope 51 of the winch 5 passes through the top pulley 47 of the support arm 41 and the front pulley 47 of the telescopic arm 43 in sequence, and is vertical to the ground. The front end of the wire rope 51 is equipped with a hook 52 with a rated lifting capacity of 2t.

[0066] Specifically, the support arm 41 is a square structural tube, the fixed arm 42 passes through the support arm 41 , and the fixed arm 42 can be welded to the support arm 41 .

[0067] In one embodiment, see Figure 7 The telescopic adjustment structure includes a turntable 45 and a screw rod 46. The screw rod 46 is arranged horizontally and passes through the fixed arm 42 and is threadedly connected to the telescopic arm 43. The turntable 45 is arranged at one end of the fixed arm 42 away from the telescopic arm 43 and is connected to the screw rod 46. The fixed arm 42 and the telescopic arm 43 are both square tubes. Rotating the turntable 45 can drive the telescopic arm 43 to extend into or out of the fixed arm 42.

[0068] The fixed arm 42 and the telescopic arm 43 are both square tubes. The shapes of the fixed arm 42 and the telescopic arm 43 restrict the telescopic arm 43 from rotating relative to the fixed arm 42. The screw rod 46 is threadedly connected with the telescopic arm 43 to form a screw mechanism. When the turntable 45 is rotated, the turntable 45 drives the screw rod 46 to rotate. The rotation of the screw rod 46 drives the telescopic arm 43 to move in the direction of extending into or out of the fixed arm 42 to adjust the length of the boom structure 4.

[0069] Specifically, a square hole is designed in the center of the turntable 45 to match the square column at the tail end of the screw rod 46 to achieve a fixed connection between the turntable 45 and the screw rod 46 .

[0070] In one embodiment, see Figure 6 A pull rod 48 is provided between the support arm 41 and the fixed arm 42 .

[0071] In order to ensure the stability between the fixed arm 42 and the supporting arm 41 , a pull rod 48 is additionally provided between the supporting arm 41 and the fixed arm 42 .

[0072] Specifically, see Figure 6 The pull rod 48 is arranged on the side of the support arm 41 away from the winch 5 , and the pull rod 48 can be welded to the support arm 41 and the fixed arm 42 .

[0073] The portable magnetic base crane provided in this embodiment is easy to disassemble, assemble and move, the position of the hoisting parts is dynamically adjustable, and the designed crane size parameters can achieve a hoisting weight of 1 t and a lifting height of 40 m. Specifically, the crane has the following advantages:

[0074] (1) It effectively solves the problem of crane coordination required for high-altitude equipment maintenance, achieving the goal of low operating costs and high lifting efficiency.

[0075] (2) The design is modular and compact, making the crane easy to disassemble and install.

[0076] (3) Modular components are used, and each component can be moved by one person, making it convenient for manpower to transport the components to high-altitude equipment for assembly.

[0077] (4) By using a magnetic base, the small crane can be quickly fixed (removed) on the steel structure surface of the equipment, making it convenient to move the crane at any time.

[0078] (5) It can rotate and adjust the amplitude, which solves the need to move the position of the hanging parts and improves the overall work efficiency.

[0079] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A portable magnetic base hoist, characterized in that: Base, magnetic base, upright structure, boom structure and winch, including: The magnetic seat is arranged on the base, and when the magnetic seat is closed, the base can be fixed on the device by adsorption of the magnetic seat; The upright pole structure comprises an upright pole bottom pole and an upper rotating pole, wherein the bottom of the upright pole bottom pole is connected to the base, and the top of the upright pole is rotatably connected to the upper rotating pole; The boom structure is arranged transversely and fixed on the upper rotating column, and the length of the boom structure is adjustable; The free end of the wire rope on the hoist is provided with a hook, and the boom structure is provided with a pulley matched with the wire rope. One end of the hoist close to the boom structure and the other end of the boom structure are the hanging positions of the hook.

2. The portable magnetic base hoist according to claim 1, characterized in that: The base is provided with a mounting hole, the magnetic seat comprises a force seat lower part and a force seat upper part connected to the force seat lower part, a step is formed between the force seat lower part and the force seat upper part, the force seat lower part is inserted into the mounting hole, and the force seat upper part is supported on the top surface of the base.

3. The portable magnetic base hoist according to claim 1, characterized in that: The base is a plate-like structure, a columnar portion is disposed in the middle of the base, the column bottom rod is inserted into the columnar portion and is threadedly connected to the columnar portion; the magnetic seats are disposed on both sides of the columnar portion.

4. The portable magnetic base hoist according to claim 1, characterized in that: A handle is arranged on the circumferential side wall of the column bottom rod, and the handle is detachably connected to the column bottom rod.

5. The portable magnetic base hoist according to claim 1, characterized in that: An upper pull ring is arranged on the bottom rod of the column, a base pull ring is arranged on the base, tightening ropes are arranged on both the upper pull ring and the base pull ring, and the tightening rope of the upper pull ring and the tightening rope of the base pull ring are connected by a turnbuckle.

6. The portable magnetic base hoist according to claim 1, characterized in that: The column bottom rod and the upper rotating column are rotatably connected via a bearing.

7. The portable magnetic base hoist according to claim 6, characterized in that: A U-shaped bayonet plate is arranged on the top of the vertical pole structure, the boom structure is inserted into the U-shaped bayonet plate, and the boom structure and the U-shaped bayonet plate are detachably connected via bolts.

8. The portable magnetic base hoist according to any one of claims 1 to 7, characterized in that: The boom structure includes a supporting arm, a fixed arm, a telescopic arm and a telescopic adjustment structure. The supporting arm is vertically arranged and connected to the vertical pole structure, the fixed arm is transversely arranged and fixed on the supporting arm, the telescopic arm is transversely arranged and inserted into the fixed arm, the telescopic adjustment structure is connected to the telescopic arm to adjust the extended length of the telescopic arm, the winch is arranged on the fixed arm, and the pulley is arranged on the top of the supporting arm and the free end of the telescopic arm.

9. The portable magnetic base hoist according to claim 8, characterized in that: The telescopic adjustment structure includes a turntable and a screw rod, the screw rod is arranged horizontally and passes through the fixed arm and is threadedly connected to the telescopic arm, the turntable is arranged at one end of the fixed arm away from the telescopic arm and is connected to the screw rod, the fixed arm and the telescopic arm are both square tubes, and rotating the turntable can drive the telescopic arm to extend into or out of the fixed arm.

10. The portable magnetic base hoist according to claim 8, characterized in that: A pull rod is arranged between the supporting arm and the fixing arm.

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