A telescopic inspection device for a crane

Abstract

The utility model provides a telescopic inspection device for crane belongs to crane inspection technical field, including telescopic link, handle and camera, handle is located at the bottom of telescopic link, and the top of telescopic link is equipped with the extension frame, is equipped with universal hose A and universal hose B on the extension frame, camera is connected with universal hose A, and universal hose B is connected with the blowing nozzle, handle is built -in and is supplied with the power unit, is equipped with the control panel on handle, and one side of handle is equipped with the display screen close to control panel, the inside of telescopic link is equipped with spiral data line, and spiral data line connects camera and display screen, the inside of telescopic link still is equipped with telescopic hose, and telescopic hose connects blowing nozzle and solenoid valve, the utility model discloses through double universal hose, can independently adjust the working angle of camera and blowing nozzle, handle integrated power supply control, and through the lock sleeve structure locking telescopic link, can realize non -injury cleaning, convenient operation and stable safety inspection, is suitable for promotion.

Description

Technical Field

[0001] This utility model relates to the field of crane inspection technology, and in particular to a telescopic inspection device for cranes. Background Technology

[0002] Lifting machinery is an indispensable hoisting equipment in industrial production. Verifying nameplate information and observing the connection of safety sliding lines and grounding wires are crucial tasks in enterprise management, inspection and testing, registration, market supervision, hazard and risk prevention, and accident investigation. There is no unified standard for the fixed location of nameplates; they are sometimes affixed to the side of the main beam end, the side of the mid-span, or the end beam, and the surface of the nameplates is often covered with dust in production workshops and outdoor environments. The height of the safety sliding lines is often flush with the main beam, which makes traditional inspection methods significantly inadequate. Using mobile hydraulic lifting platforms with personnel is dangerous, costly, and difficult to equip on-site. Using telescopes with high-beam flashlights on the ground is prone to observation difficulties due to hand tremors, while drones are expensive to purchase and have limited flight restrictions within the factory area.

[0003] In the prior art, Chinese Patent No. CN206831100U discloses a portable device for macroscopic inspection of lifting machinery. Although this device improves the convenience of inspection through a telescopic rod, camera and lighting device, and cleaning components, it still has shortcomings: First, the cleaning uses a small motor-driven brush, which easily scratches the nameplate surface and is not suitable for nameplates made of easily worn materials; second, it only has a single universal hose, which can only adjust the integrated camera, lighting, and cleaning brush as a whole, and cannot independently control the cleaning direction, resulting in insufficient flexibility when dealing with nameplates or sliding lines with complex angles; third, the power supply unit is integrated into the camera and lighting device, making replacement and charging inconvenient, and there is no centralized control panel, requiring individual adjustment of each component, resulting in low efficiency. In addition, the telescopic rod of this device lacks dedicated wiring and air supply channels, resulting in low functional integration.

[0004] It is evident that existing devices still have room for improvement in terms of cleanliness and safety, operational flexibility, power supply and control convenience, and structural integration. Therefore, the industry urgently needs a testing device that can achieve contactless cleaning, centralized control, and convenient operation to meet the efficient and safe testing requirements of lifting machinery. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies, such as poor cleanliness and safety, poor operational flexibility, and low functional integration, and to provide a telescopic inspection device for cranes.

[0006] This utility model is achieved through the following technical solution: a telescopic inspection device for cranes, comprising a telescopic rod, a handle, and a camera; the handle is located at the bottom of the telescopic rod, and an extension frame is located at the top of the telescopic rod; the extension frame is provided with a universal coil A and a universal coil B, the camera is connected to the universal coil A, and the universal coil B is connected to a blower nozzle; the handle has a built-in power supply unit, a control panel is located on the handle, and a display screen is located on one side of the handle near the control panel; the telescopic rod is a multi-section coaxial sleeve structure, with a locking mechanism between adjacent sleeves; a spiral data cable is installed inside the telescopic rod. One end of the spiral data cable passes through the universal joint A and is electrically connected to the camera. The other end of the spiral data cable passes through the handle and is electrically connected to the display screen. The telescopic rod also has a telescopic hose inside. One end of the telescopic hose passes through the universal joint B and is connected to the blower nozzle. The other end of the telescopic hose is connected to a solenoid valve. The solenoid valve is located at the bottom of the telescopic rod near the handle. The solenoid valve can be connected to an external air source through an air supply hose. The control panel is electrically connected to the power supply unit, the display screen, and the solenoid valve. The control panel can control the opening and closing of the display screen and the solenoid valve. The display screen can control the operation of the camera and display or transmit the camera's recording.

[0007] This device utilizes a dual universal hose design—Universal Hose A and Universal Hose B—allowing the camera and blower nozzle to be independently adjustable in angle. Compared to existing technologies where a single universal hose can only adjust an integrated device, this design offers greater flexibility in adapting to nameplates or sliding lines with complex angles. Pneumatic blowing—through a solenoid valve, telescopic hose, and blower nozzle—achieves zero mechanical contact, avoiding the risk of scratching the nameplate caused by brush wiping in existing technologies. The power supply unit features a built-in handle and a centralized control panel, resolving the issues of dispersed power supply and cumbersome operation in existing technologies. The spiral data cable deforms synchronously with the telescopic rod, ensuring stable signal and power transmission during extension and retraction, guaranteeing clear images, and improving inspection accuracy.

[0008] A further improvement of this utility model is that an expansion base is provided on one side of the handle near the control panel, the display screen is detachably inserted into the expansion base, and the other end of the spiral data cable is connected to the expansion base.

[0009] A further improvement of this utility model is that the locking mechanism is a locking sleeve structure, and two adjacent sleeves include an outer tube and an inner tube that are slidably inserted. The locking mechanism is screwed to the insertion port of the outer tube. By rotating the locking mechanism, the position of the inner tube can be fixed.

[0010] A further improvement of this utility model is that the power supply unit includes a lithium battery, the handle has a battery compartment adapted to the lithium battery, the end of the handle away from the telescopic rod has an opening communicating with the battery compartment, the lithium battery is installed inside the battery compartment through the opening, and a battery cover adapted to the battery compartment is screwed to the opening.

[0011] A further improvement of this utility model is that the handle is provided with a charging interface, which is electrically connected to the power supply unit.

[0012] A further improvement of this utility model is that the extension frame is a rectangular support, and the extension frame is vertically connected to the telescopic rod.

[0013] A further improvement of this utility model is that both the telescopic rod and the handle are made of uniform material.

[0014] A further improvement of this utility model is that the outer surface of the handle is provided with an anti-slip texture.

[0015] As can be seen from the above technical solutions, the beneficial effects of this utility model are: 1. This device connects the camera and the blowing nozzle separately via dual universal hoses, allowing independent adjustment of the camera angle and blowing direction. It is compatible with nameplates and safety guide lines at different locations on the crane, offering far greater flexibility than the integrated adjustment of a single universal hose in existing technologies. Simultaneously, it employs pneumatic blowing, with airflow delivered through the telescopic hose and blowing nozzle, eliminating mechanical contact and completely avoiding scratches on the nameplate caused by brush wiping in existing technologies, thus ensuring the integrity of the equipment's information carrier.

[0016] 2. This device, through its built-in power supply unit and integrated control panel, can centrally control the display screen and the opening and closing of the solenoid valve, solving the problems of scattered power supply and cumbersome operation without centralized control in the prior art; the display screen can be detached and inserted into the extension base, which is more efficient than the "fixed clip + clamping device" in the prior art, and also supports carrying it alone; the charging interface design allows for charging without removing the battery, extending the continuous use time of the device and reducing the time spent on battery replacement.

[0017] 3. The locking mechanism of the telescopic rod of this device adopts a locking sleeve structure, which provides a more uniform and reliable locking force compared to the buckle fixing in the existing technology, preventing the telescopic rod from loosening and causing component displacement during inspection; the telescopic rod and handle are made of uniform material to avoid localized damage and extend service life; the anti-slip texture of the handle increases grip friction, and together with the insulation design, it effectively prevents the risk of slipping and electric shock, ensuring the safety of operators. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0020] Figure 2 This is a partial cross-sectional view of the telescopic rod according to a specific embodiment of the present utility model.

[0021] Figure 3 This is a cross-sectional view of the handle of a specific embodiment of this utility model.

[0022] Figure 4 This is a structural schematic diagram of the locking mechanism according to a specific embodiment of the present utility model.

[0023] In the diagram: 1. Telescopic rod; 101. Outer tube; 102. Inner tube; 2. Handle; 201. Battery compartment; 202. Battery cover; 203. Anti-slip texture; 204. Charging port; 3. Extension frame; 4. Universal flexible hose A; 5. Universal flexible hose B; 6. Camera; 7. Blower nozzle; 8. Control panel; 9. Display screen; 901. Extension base; 10. Spiral data cable; 11. Telescopic flexible hose; 12. Lithium battery; 13. Locking mechanism; 14. Solenoid valve; 15. Air delivery hose. Detailed Implementation

[0024] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0025] Now refer to Figures 1-4The following is a description of a specific embodiment: A telescopic inspection device for cranes according to this utility model includes a telescopic rod 1, a handle 2, and a camera 6. The handle 2 is located at the bottom of the telescopic rod 1, and an extension frame 3 is located at the top of the telescopic rod 1. A universal coil A4 and a universal coil B5 are mounted on the extension frame 3. The camera 6 is connected to the universal coil A4, and a blower nozzle 7 is connected to the universal coil B5. The handle 2 has a built-in power supply unit, a control panel 8, and a display screen 9 near the control panel 8 on one side of the handle 2. The telescopic rod 1 is a multi-section coaxial sleeve structure, with a locking mechanism 13 between adjacent sleeves. A spiral data cable 10 is installed inside the telescopic rod 1. One end of the spiral data cable 10 passes through the universal snake tube A4 and is electrically connected to the camera 6. The other end of the spiral data cable 10 passes through the handle 2 and is electrically connected to the display screen 9. The telescopic rod 1 also has a telescopic hose 11 inside. One end of the telescopic hose 11 passes through the universal snake tube B5 and is connected to the blower nozzle 7. The other end of the telescopic hose 11 is connected to a solenoid valve 14. The solenoid valve 14 is located at the bottom of the telescopic rod 1 near the handle 2. The solenoid valve 14 can be connected to an external air source through the air supply hose 15. The control panel 8 is electrically connected to the power supply unit, the display screen 9 and the solenoid valve 14. The control panel 8 can control the opening and closing of the display screen 9 and the solenoid valve 14. The display screen 9 can control the operation of the camera 6 and display or transmit the recording effect of the camera 6.

[0026] In use, first adjust the length of the multi-section sleeve of the telescopic rod 1, and fix the telescopic rod 1 to the required inspection height through the locking mechanism 13 between adjacent sleeves; then adjust the angle of the camera 6 through the universal snake tube A4 on the extension frame 3 so that the camera 6 is aligned with the crane nameplate or safety guide rail, and at the same time adjust the direction of the blower nozzle 7 through the universal snake tube B5 to ensure that the nozzle is facing the surface of the nameplate to be cleaned; connect the external air source to the solenoid valve 14 through the air supply hose 15, and the power supply unit built into the handle 2 supplies power to the control panel 8, the display screen 9 and the camera 6; the power output of the power supply unit is transmitted to the control panel 8 and the display screen 9 through the lines, and then the display screen 9 transmits the power to the camera 6 through the spiral data cable 10 to achieve stable power supply to each electrical component; operating the control panel 8 can open and close the display screen 9 and the solenoid valve 14, and the control panel 8 is connected to the power supply unit, the display screen 9 and the solenoid valve 14. The electrical connection receives button commands from the operator to control the circuit's on / off state, thereby achieving precise control over the opening and closing of the display screen 9 and the on / off state of the solenoid valve 14. When the solenoid valve 14 is open, the valve port opens after the solenoid valve 14 is energized, and the airflow from the external air source enters the telescopic hose 11 through the air delivery hose 15, and then is delivered to the blower nozzle 7 through the telescopic hose 11 to form a directional airflow to blow away the nameplate dust. When the power is off, the valve port closes, and the airflow is interrupted. The image of the nameplate or sliding line captured by the camera 6 is transmitted to the display screen 9 through the spiral data cable 10 inside the telescopic rod 1. The camera 6 converts the light signal into an electrical signal, which is transmitted to the display screen 9 through the spiral data cable 10. The display screen 9 restores the electrical signal into an image and displays it. At the same time, the display screen 9 can send control commands to the camera 6 through the spiral data cable 10 to realize the operation of the camera 6 such as starting, stopping, and recording. The display screen 9 can also transmit the image to other devices.

[0027] This device, through the design of dual universal hoses—Universal hose A4 and universal hose B5—allows the camera 6 and the blower nozzle 7 to be independently adjustable in angle. Compared to existing technologies where a single universal hose can only adjust an integrated device, this device is more flexible in adapting to nameplates or sliding lines with complex angles. Pneumatic blowing—through the solenoid valve 14, telescopic hose 11, and blower nozzle 7—achieves non-mechanical contact, avoiding the risk of scratching the nameplate by brush wiping in existing technologies. The power supply unit has a built-in handle 2 and a control panel 8 for centralized control, solving the problems of scattered power supply and cumbersome operation in existing technologies. The spiral data cable 10 can deform synchronously with the telescopic rod 1 during extension and retraction, ensuring stable signal and power transmission during the extension and retraction process, guaranteeing clear images, and improving inspection accuracy.

[0028] Specifically, refer to Figure 3 An expansion base 901 is provided on one side of the handle 2 near the control panel 8. The display screen 9 is detachably inserted into the expansion base 901, and the other end of the spiral data cable 10 is connected to the expansion base 901.

[0029] When installing the display screen 9, the display screen 9 is detachably inserted into the extension base 901 on one side of the handle 2. At this time, the spiral data cable 10 inside the telescopic rod 1 automatically achieves electrical connection with the display screen 9 through the connection with the extension base 901. The fixed connection between the spiral data cable 10 and the extension base 901 allows the display screen 9 to receive the image signal and power transmitted by the camera 6 through the spiral data cable 10 without additional wiring after insertion, simplifying the connection process. When the display screen 9 is not in use or needs to be carried separately, it can be directly pulled out from the extension base 901 to complete the disassembly.

[0030] Compared to the existing technology's "fixed clip + clamping device," the disassembly and assembly structure of this device—the cooperation design between the display screen 9 and the extension base 901—makes disassembly and assembly more convenient and saves time on the installation and removal of the display screen 9. After disassembly, the display screen 9 can be carried independently or used in other devices, improving the portability of the device and avoiding the inefficiency caused by the cumbersome disassembly and assembly of the clamping device in Comparative Document 1.

[0031] Specifically, refer to Figure 3 The power supply unit includes a lithium battery 12. The handle 2 has a battery compartment 201 adapted to the lithium battery 12 inside. The end of the handle 2 away from the telescopic rod 1 has an opening communicating with the battery compartment 201. The lithium battery 12 is installed inside the battery compartment 201 through the opening. A battery cover 202 adapted to the battery compartment 201 is screwed to the opening.

[0032] When installing the power supply unit, unscrew the battery cover 202 at the end of the handle 2 away from the telescopic rod 1, and insert the lithium battery 12 into the battery compartment 201 inside the handle 2 through the opening of the battery compartment 201. Then tighten the battery cover 202 to complete the fixation. The inner wall of the battery compartment 201 is provided with conductive contacts. After the lithium battery 12 is inserted, it contacts the contacts, so that the electrical energy of the lithium battery 12 is transmitted to the circuit inside the handle 2 through the contacts to power the control panel 8, display screen 9 and other components. When the lithium battery 12 is depleted, repeat the above operation to remove the old battery and replace it with a new one.

[0033] The lithium battery 12 of this device is built into the battery compartment 201 of the handle 2. Compared with the design of the power supply unit built into the camera and lighting device in the prior art, the battery replacement does not require disassembling the camera 6 and other components, making the operation more convenient and saving battery replacement time. The battery cover 202 is screwed in to ensure that the lithium battery 12 is installed stably in the handle 2, avoiding power interruption caused by the battery loosening during use, and improving the stability of the device.

[0034] Specifically, refer to Figure 1 and Figure 2The extension frame 3 is a rectangular support, and it is perpendicularly connected to the telescopic rod 1. During installation, the plane of the extension frame 3 is perpendicular to the axis of the telescopic rod 1. The universal joint A4 and universal joint B5 are respectively installed on different sides of the rectangular extension frame 3. They do not interfere with each other when adjusting the angle and can extend in different directions perpendicular to the telescopic rod 1, ensuring that the camera 6 and the blower nozzle 7 can simultaneously cover the target inspection area.

[0035] The rectangular vertical structure of the extension frame 3 provides independent installation space for the double universal hoses—universal hose A4 and universal hose B5, avoiding the adjustment interference problem caused by the integration of multiple components in the single universal hose in the existing technology. This allows for more free adjustment of the angle between the camera 6 and the blower nozzle 7, further adapting to the inspection needs of different positions of the crane and improving operational flexibility.

[0036] In one embodiment, reference Figure 4 The locking mechanism 13 is a locking sleeve structure. Two adjacent sleeves include an outer tube 101 and an inner tube 102 that are slidably inserted. The locking mechanism 13 is screwed to the insertion port of the outer tube 101. By rotating the locking mechanism 13, the position of the inner tube 102 can be fixed.

[0037] When adjusting the length of the telescopic rod 1, the inner tube 102 is stretched outward and slidably inserted into the outer tube 101 to the target height. Then, the locking sleeve structure screwed to the insertion port of the outer tube 101 is rotated. The locking mechanism increases the friction by squeezing the outer wall of the inner tube 102, thereby fixing the position of the inner tube 102. When it is necessary to retract the telescopic rod 1, the reverse locking mechanism 13 is used to reduce the squeezing force on the inner tube 102, so that the inner tube 102 can be pushed into the outer tube 101.

[0038] Compared with the buckle fixing in the prior art, the locking mechanism 13 of the locking sleeve structure has a more uniform locking force and higher reliability. It can effectively prevent the inner tube 102 and the outer tube 101 from sliding relative to each other due to vibration or external force during the inspection process, avoid the position displacement of the camera 6 or the blower nozzle 7, ensure the inspection accuracy, and solve the problem of easy loosening of the buckle fixing in the prior art.

[0039] In one embodiment, reference Figure 1 The handle 2 is provided with a charging interface 204, which is electrically connected to the power supply unit.

[0040] When the power supply unit built into the controller 2 is low on power, the connector of the external charger is inserted into the charging port 204 on the controller 2. The charging port 204 is electrically connected to the power supply unit through internal circuitry. The charging port 204 receives power from the external charger and transmits it to the lithium battery 12 through the circuitry, thereby directly charging the lithium battery 12 without removing the battery.

[0041] Compared to existing designs that require disassembling the camera device to replace the battery, the charging interface 204 of this device can directly charge the power supply unit, avoiding the hassle of frequent battery replacements, extending the continuous use time of the device, improving inspection efficiency, and reducing damage during battery removal, thus extending the lifespan of the lithium battery 12.

[0042] In one embodiment, both the telescopic rod 1 and the handle 2 are made of a uniform material.

[0043] Both the telescopic rod 1 and the handle 2 are made of uniform material, which makes the mechanical properties, strength and toughness of each section of the telescopic rod 1 consistent, and the overall density of the handle 2 uniform. When adjusting the telescopic rod 1, the uniform material of the sleeve can withstand consistent tension and locking force, without local stress concentration. When holding the handle 2 for operation, the uniform material makes the center of gravity of the handle 2 evenly distributed, without the problem of uneven weight distribution caused by uneven material.

[0044] Uniform material ensures the overall structural stability of the telescopic rod 1 and handle 2, avoiding the risk of local breakage that may occur with non-uniform materials and extending the service life of the device; at the same time, the center of gravity of handle 2 is balanced, making it easier to hold and operate, improving the operating comfort during the inspection process, and solving the safety hazards that may be caused by non-uniform materials.

[0045] In one embodiment, reference Figure 1 The outer surface of the handle 2 is provided with anti-slip texture 203. When adjusting the length of the telescopic rod 1 or pressing the control panel 8, the anti-slip texture 203 on the outer surface of the handle 2 increases the friction between the skin of the hand and the surface of the handle 2. Even when the hands are sweaty, dusty, or in a humid outdoor environment, it can effectively prevent relative slippage between the hand and the handle 2, ensuring stable control of the device by the operator.

[0046] The anti-slip texture 203 on the handle 2 improves grip stability and prevents damage to components such as the telescopic rod 1 and camera 6 caused by slipping during the inspection process, or safety accidents caused by slipping. It further ensures the safety of operators, especially when adjusting the telescopic rod 1 at height.

[0047] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A telescopic inspection device for cranes, comprising a telescopic rod (1), a handle (2), and a camera (6), characterized in that, The handle (2) is located at the bottom of the telescopic rod (1), and an extension frame (3) is located at the top of the telescopic rod (1). The extension frame (3) is equipped with a universal coil A (4) and a universal coil B (5). The camera (6) is connected to the universal coil A (4), and the universal coil B (5) is connected to a blower nozzle (7). The handle (2) has a built-in power supply unit, and a control panel (8) is located on the handle (2). A display screen (9) is located on one side of the handle (2) near the control panel (8). The telescopic rod (1) is a multi-section coaxial sleeve structure, with a locking mechanism (13) between adjacent sleeves. A spiral data cable (10) is located inside the telescopic rod (1). One end of the spiral data cable (10) passes through the universal coil A (4) and is electrically connected to the camera (6). The other end of the data cable (10) passes through the handle (2) and is electrically connected to the display screen (9); the telescopic rod (1) is also equipped with a telescopic hose (11), one end of the telescopic hose (11) passes through the universal snake tube B (5) and is connected to the blower nozzle (7), and the other end of the telescopic hose (11) is connected to a solenoid valve (14). The solenoid valve (14) is located at the bottom of the telescopic rod (1) near the handle (2), and the solenoid valve (14) can be connected to an external air source through the air supply hose (15); the control panel (8) is electrically connected to the power supply unit, the display screen (9) and the solenoid valve (14). The control panel (8) can control the opening and closing of the display screen (9) and the solenoid valve (14). The display screen (9) can control the operation of the camera (6) and display or transmit the recording effect of the camera (6).

2. The telescopic inspection device for cranes according to claim 1, characterized in that, An expansion base (901) is provided on one side of the handle (2) near the control panel (8). The display screen (9) is detachably inserted into the expansion base (901). The other end of the spiral data cable (10) is connected to the expansion base (901).

3. The telescopic inspection device for cranes according to claim 1, characterized in that, The locking mechanism (13) is a locking sleeve structure. The two adjacent sleeves include an outer tube (101) and an inner tube (102) that are slidably inserted. The locking mechanism (13) is screwed to the insertion port of the outer tube (101). By rotating the locking mechanism (13), the locking mechanism (13) can fix the position of the inner tube (102).

4. The telescopic inspection device for cranes according to claim 1, characterized in that, The power supply unit includes a lithium battery (12). The handle (2) has a battery compartment (201) adapted to the lithium battery (12) inside. The end of the handle (2) away from the telescopic rod (1) has an opening that communicates with the battery compartment (201). The lithium battery (12) is installed inside the battery compartment (201) through the opening. A battery cover (202) adapted to the battery compartment (201) is screwed into the opening.

5. A telescopic inspection device for cranes according to claim 1, characterized in that, The handle (2) is provided with a charging interface (204), which is electrically connected to the power supply unit.

6. A telescopic inspection device for cranes according to claim 1, characterized in that, The extension frame (3) is a rectangular support, and the extension frame (3) is vertically connected to the telescopic rod (1).

7. A telescopic inspection device for a crane according to claim 1, characterized in that, Both the telescopic rod (1) and the handle (2) are made of uniform material.

8. A telescopic inspection device for a crane according to claim 1, characterized in that, The outer surface of the handle (2) is provided with an anti-slip texture (203).

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