Rapidly-detachable arc-shaped lifting appliance capable of automatically adjusting gravity center

Abstract

The invention belongs to the technical field of lifting processes, and particularly relates to a quickly detachable arc-shaped lifting appliance capable of automatically adjusting the gravity center, which comprises a lifting unit, a rolling aligning unit, a transverse aligning unit and a lifting hook unit, the lifting unit comprises an arc-shaped lifting frame, stroke limiting safety fixing bolts fixed to the two sides of the arc-shaped lifting frame and a fixing limiting hole formed in the middle of the arc-shaped lifting frame, and arc-shaped grooves are formed in the two sides of the arc-shaped lifting frame; the rolling aligning unit comprises a sliding frame, bearing sets fixed to the two sides of the interior of the sliding frame and a stop bolt fixed to one side of the sliding frame. The transverse aligning unit comprises a carriage, end covers fixed to the two ends of the carriage and a rotating shaft arranged in the carriage. After adjustment of all the aligning structures, the gravity center of the lifting appliance and the gravity center of the clamp are consistent, the whole lifting appliance is moved through the control system, the lifted clamp is moved to the assembly position, the center shaft is fixed through the fixing pin, rapid assembly of the clamp is achieved, and the assembly accuracy is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hoisting technology, and particularly relates to a quickly detachable arc-shaped lifting tool that can self-adjust the center of gravity. Background Art

[0002] A lifting tool refers to a device for lifting heavy objects in a hoisting machine. The most commonly used lifting tools for lifting finished products are hooks and slings. Others include eyebolts, lifting suction cups, clamps, and forklift tines, etc., which are widely used in the hoisting and lifting industry. Commonly used in lifting tools are special rigging such as hooks, wire ropes, and chains. In order to meet the hoisting requirements for the maintenance of daily large-scale machinery, lifting tools are auxiliary mechanical equipment for loading, unloading, and transferring goods. With the continuous development of China's industrial level, the requirements for the level of lifting tools are getting higher and higher. When the lifting tool cooperates with the robotic arm, in order to ensure the accuracy of docking, the attitude of the object to be lifted needs to be changed. However, the position and attitude of the object to be lifted after being lifted are affected by external forces, making it difficult to perform precise positioning and attitude transformation. Moreover, it is difficult to ensure that the center of gravity of the lifting tool is consistent with the center of gravity of the object to be lifted during the hoisting process, which easily causes the object to be lifted to tilt during hoisting, resulting in the object to be lifted swinging due to unstable center of gravity, not only reducing the docking accuracy, but also causing harm to other equipment and operators.

[0003] Therefore, a quickly detachable arc-shaped lifting tool that can self-adjust the center of gravity is proposed to solve the above problems. Summary of the Invention

[0004] In view of the above situation, the present invention provides a quickly detachable arc-shaped lifting tool that can self-adjust the center of gravity. The lifting unit is fixedly connected to the fixture to be lifted through the stroke limit safety fixing bolts on both sides of the arc-shaped hanger. After being lifted, the bearing group in the rolling alignment unit rolls in the arc-shaped groove to adjust the positions of the Y-axis and Z-axis. At the same time, the T-shaped seat rotates on the rotating shaft to adjust the position of the X-axis. After the centers of gravity of the tool to be lifted and the fixture are consistent, the two maintain balance. The rolling alignment unit is fixed by the stop bolts, and the connecting shaft is fixed by the anti-loosening screws. At this time, the entire lifting tool is moved through the control system to move the fixture to be lifted to the assembly position, and the central shaft is fixed by the fixing pin, improving the assembly accuracy.

[0005] The technical solution provided by the present invention is: a quickly detachable arc-shaped lifting tool that can self-adjust the center of gravity, which includes a lifting unit, a rolling alignment unit, a lateral alignment unit, and a hook unit. The lifting unit includes an arc-shaped hanger, stroke limit safety fixing bolts fixed on both sides of the arc-shaped hanger, and a fixed limit hole opened in the middle of the arc-shaped hanger. Arc-shaped grooves are opened on both sides of the arc-shaped hanger. The lifting unit is used to lift the fixture to be installed, and the stroke limit safety fixing bolts on both sides of the arc-shaped hanger pass through the fixed limit hole to be fixedly connected to the fixture to be installed. The hoisting machine lifts the fixture to be installed through the hook unit;

[0006] The rolling self-aligning unit includes a carriage, bearing groups fixed on both sides inside the carriage, and a stop bolt fixed on one side of the carriage. After the position of the fixture is adjusted, the stop bolt is used to fix the rolling self-aligning unit on the arc-shaped hanger to prevent the rolling self-aligning unit from moving. The bearing groups are respectively in rolling connection with arc-shaped grooves opened on both sides of the arc-shaped hanger. The stop bolt is fixed in a fixed limit hole in the middle of the arc-shaped hanger. A T-shaped seat is fixed on the carriage, and the T-shaped seat is rotationally connected with the transverse self-aligning unit. The rolling self-aligning unit slides in the arc-shaped groove of the arc-shaped hanger through the bearing groups, and the positions of the Y-axis and Z-axis of the fixture can be adjusted during this process;

[0007] The transverse self-aligning unit includes a carriage, end covers fixed at both ends of the carriage, a rotating shaft arranged inside the carriage, and a locknut fixed at one end of the rotating shaft. Both ends of the rotating shaft are rotationally connected to both ends of the carriage through rolling bearings fixed inside the end covers. A circumferential groove is opened on one side of the rotating shaft close to the locknut, and the locknut is in sliding connection with the circumferential groove. Since the bearing groups slide in the arc-shaped grooves of the arc-shaped hanger and both ends of the rotating shaft are rotationally connected to the rolling bearings fixed inside the end covers, the T-shaped seat is caused to move on the rotating shaft by itself, and the position of the X-axis is adjusted. After the centers of gravity of the spreader and the fixture are consistent and the two are balanced, the relevant structures can be locked to maintain this balanced state;

[0008] The hook unit includes, from the inside out, a central shaft, a transmission bearing, and a connecting seat, and also includes a lifting ring fixed at the upper end of the central shaft. The connecting seat is fixedly connected to the top of the carriage in the transverse self-aligning unit. A groove is opened at the top of the carriage. The bottom of the central shaft is clamped with the groove and is rotationally connected to the top of the carriage through a transmission bearing.

[0009] Further improvement of the above solution: Limited position shafts are arranged on both sides of the arc-shaped hanging bracket. The limited position shafts are located between the safety fixing bolts for stroke limit on both sides. The limited position shafts are used to limit the sliding track of the rolling alignment unit to prevent it from moving excessively to both ends of the arc-shaped hanging bracket. The safety fixing bolts for stroke limit are push-type locking bolts. The lower end of the push-type locking bolt is provided with a locking ball head. The upper surface of the push-type locking bolt is provided with a push button for controlling the locking ball head, and a rotating nut fixed on the push-type locking bolt. The rotating nut is fixedly connected to the bottom end of the arc-shaped hanging bracket through a chain. This setting prevents the rotating nut from being lost after being unscrewed, so it is fixed to the bottom end of the hanging bracket through a chain. An arc-shaped clamping strip is integrally arranged on the lower end surface of the arc-shaped hanging bracket. The arc-shaped clamping strip is clamped with the arc-shaped groove on the outer side of the fixture to be lifted. This setting further ensures the tightness of the connection between the lifting tool and the fixture, improving the safety and precision of loading and unloading. The push-type locking bolt passes through the arc-shaped hanging bracket and is fixedly connected to the fixture to be lifted. Before installing the fixture, the locking ball head is retracted into the interior by pressing the push button. After the fixture and the lifting tool are installed, that is, the push-type locking bolt passes through the arc-shaped hanging bracket and is fixedly connected to the fixture to be lifted, and then the locking ball head is released by pressing the push button to achieve the locking purpose.

[0010] Further improvement of the above solution: The bearing groups are arranged on both sides of the arc-shaped hanging bracket. Each side of the bearing group includes several bearings arranged in a matrix. The bearings are fixed to the inner side of the sliding carriage through fixed shafts. The sliding carriage rolls in the arc-shaped groove through the bearings.

[0011] Further improvement of the above solution: The stop bolt includes a hollow cross bar and an L-shaped bolt body located inside the hollow cross bar. The L-shaped bolt body is rotatably connected to the hollow cross bar. The hollow cross bar is fixedly connected to the side wall of the sliding carriage through a bolt. The outer end of the hollow cross bar is provided with an arc-shaped rotating end. The L-shaped bolt body rotates along the arc-shaped rotating end, and locking grooves are opened on both the upper and lower sides of the arc-shaped rotating end. The L-shaped bolt body is clamped with the locking grooves. When the L-shaped bolt body is clamped with the upper locking groove, it is used to lock the rolling alignment unit. When alignment operation is required, the L-shaped bolt body is rotated to move along the arc-shaped rotating end until it is in a natural hanging state, and the L-shaped bolt body is pushed to be clamped with the upper locking groove to prevent it from swinging back and forth. Sealing end caps are fixed at both ends of the sliding carriage close to the limited position shafts. Scale index arrows are arranged on the sealing end caps.

[0012] Further improvement of the above solution: The anti-loosening screw includes a nut and a special-shaped column integrally arranged under the nut. Narrow cuts and wide cuts are opened on both sides of the special-shaped column along the rotating shaft. The lower end of the special-shaped column is an arc-shaped cut. The special-shaped column is clamped with the circumferential groove. This anti-loosening screw can prevent the displacement or loosening of the rotating shaft.

[0013] Further improvement of the above solution: A spirit level is provided at the upper end of the carriage. The spirit level is used to correct the state in which the centers of the fixture and the lifting tool are adjusted. Digital scales are engraved on both sides of the carriage along the arc-shaped hanger. The digital scales are located at the lower end of the side of the carriage. The digital scales are used in conjunction with the scale index arrow. After the centers of gravity of the fixture and the lifting tool are adjusted, by recording the digital scale pointed by the scale index arrow, record the positions of the scale index arrow of the rolling alignment unit 2 and the digital scale marked by the lateral alignment unit for subsequent reference for retaining the lifting posture, saving the time for adjusting the lifting posture and increasing the working efficiency. A handle is fixed above the digital scale. When installing the fixture, it is necessary to manually hold the handle to avoid the swing of the lifting tool and improve the loading and unloading efficiency.

[0014] Further improvement of the above solution: A retractable dust cover is provided at the bottom of the carriage. The dust cover is used to protect the internal structure of the lateral alignment unit and prevent external dust and debris from entering its interior, causing damage to the rotating shaft.

[0015] Further improvement of the above solution: The lifting ring includes a circular ring, a base integrally provided with the circular ring, and a connecting shaft provided under the base. A slot is opened inside the central shaft. The connecting shaft is inserted into the slot and fixedly connected to the slot. The hook unit further includes a dust cover. The dust cover can prevent external debris from entering the connecting shaft. The dust cover is fixedly connected to the upper end of the central shaft. A toothed lock screw is fixed between the base and the dust cover. A sealing ring is fixed between the dust cover and the upper end face of the connecting shaft. A sealing ring is also provided between the circumference of the central shaft and the dust cover. A circumferential protrusion is provided inside the dust cover, and an annular groove is opened at the matching position of the central shaft. The circumferential protrusion is engaged with the annular groove.

[0016] Further improvement of the above solution: A fixing pin is provided on the side of the central shaft. After the position of the central shaft is adjusted, the fixing pin is inserted to fix the central shaft.

[0017] The features and beneficial effects of the present invention are:

[0018] 1. The present invention is ingeniously designed and has a reasonable structure. By designing the arc-shaped hanger in the lifting unit and the bearing group in the rolling alignment unit, through the self-rolling of the bearing group in the arc-shaped hanger, the adjustment of the positions of the Y-axis and the Z-axis can be realized. At the same time, the self-rolling of the bearing group in the arc-shaped hanger naturally causes the T-shaped seat to rotate on the rotating shaft, achieving the purpose of self-adjusting the position of the X-axis. The entire alignment process is naturally completed through the above units. Therefore, the adjustment process is faster and more accurate. After the operator installs the fixture on the lifting tool, during the lifting process, the alignment operation can be automatically completed, greatly improving the safety and reducing the labor force.

[0019] 2. A stop bolt structure is provided. With a simple pushing operation, the fixing or loosening of the rolling self-aligning unit can be achieved, further improving the loading and unloading efficiency.

[0020] 3. A lock screw structure is provided. The design of its special-shaped cylinder avoids the displacement or loosening of the rotating shaft, improving the rationality and stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the overall structure of the present invention

[0022] Figure 2 Schematic diagram of the overall structure of the present invention in the top view direction

[0023] Figure 3 Schematic diagram of the hoisting unit of the present invention

[0024] Figure 4 Schematic diagram of the connection between the hoisting unit and the internal structure of the rolling self-aligning unit of the present invention

[0025] Figure 5 Schematic diagram of the structure of the stop bolt

[0026] Figure 6 Schematic diagram of the connection between the rolling self-aligning unit and the lateral self-aligning unit of the present invention

[0027] Figure 7 Schematic diagram of the structure of the lock screw of the present invention

[0028] Figure 8 Cross-sectional view of the present invention

[0029] Figure 9 For Figure 8 Enlarged view of part A in

[0030] Figure 10 Drawing where the safety mark of the present invention is located

[0031] In the figure: 1. Lifting unit; 101. Arc-shaped hanger; 1011. Bottom end of the arc-shaped hanger; 1012. Arc-shaped clamping strip; 102. Stroke limit safety fixing bolt; 1021. Locking ball head; 1022. Pressing button; 1023. Rotating nut; 103. Fixed limit hole; 104. Arc-shaped groove; 105. Limit shaft; 2. Rolling alignment unit; 201. Slide; 202. Bearing group; 2021. Bearing; 203. Stop bolt; 2031. Hollow cross bar; 2032. L-shaped bolt body; 2033. Bolt; 2034. Arc-shaped rotating end; 2035. Locking groove; 204. T-shaped seat; 3. Transverse alignment unit; 301. Carriage; 302. End cover; 303. Rotating shaft; 304. Anti-loosening screw; 3041. Nut; 3042. Special-shaped column; 3043. Narrow notch; 3044. Wide notch; 3045. Arc-shaped notch; 305. Circumferential groove; 306. Rolling bearing; 307. Level; 308. Digital scale; 309. Handle; 310. Contractible dust cover; 4. Hook unit; 401. Central shaft; 4011. Slot; 402. Transmission bearing; 403. Connecting seat; 404. Sling ring; 4041. Ring; 4042. Base; 4043. Connecting shaft; 405. Dust cover; 4051. Circumferential protrusion; 5. Toothed anti-loosening screw; 6. Sealing ring; 7. Circumferential sealing ring; 8. Fixed pin; 9. Safety sign. Detailed implementation mode

[0032] To elaborate on the technical content, structural features, achieved objectives and effects of the present invention, the following will be described in detail with reference to the accompanying drawings of the specification.

[0033] As Figures 1 to 9 shown, a quickly detachable arc-shaped hoist that can self-adjust the center of gravity includes a lifting unit 1, a rolling alignment unit 2, a transverse alignment unit 3 and a hook unit 4. The lifting unit 1 includes an arc-shaped hanger 101, stroke limit safety fixing bolts 102 fixed on both sides of the arc-shaped hanger 101, and a fixed limit hole 103 opened in the middle of the arc-shaped hanger. Arc-shaped grooves 104 are provided on both sides of the arc-shaped hanger 101.

[0034] The rolling alignment unit 2 includes a slide 201, a bearing group 202 fixed on both sides inside the slide, and a stop bolt 203 fixed on one side of the slide. The bearing group 202 is respectively in rolling connection with the arc-shaped grooves provided on both sides of the arc-shaped hanger. The stop bolt 203 is fixed in the fixed limit hole in the middle of the arc-shaped hanger 102. A T-shaped seat 204 is fixed on the slide 201, and the T-shaped seat 204 is rotationally connected to the transverse alignment unit 3.

[0035] The lateral centering unit 3 includes a carriage 301, end caps 302 fixed at both ends of the carriage, a rotating shaft 303 disposed inside the carriage, and a locknut 304 fixed at one end of the rotating shaft 303. Both ends of the rotating shaft 303 are rotatably connected to both ends of the carriage 301 through rolling bearings 306 fixed inside the end caps 302. A circumferential groove 305 is formed on one side of the rotating shaft 303 close to the locknut 304, and the locknut 304 is slidably connected to the circumferential groove 305;

[0036] The hook unit 4 includes, from the inside out, a central shaft 401, a transmission bearing 402, and a connecting seat 403. It also includes a lifting ring 404 fixed at the upper end of the central shaft 401. The connecting seat 403 is fixedly connected to the top of the carriage 301 in the lateral centering unit 3. A groove 306 is formed on the top of the carriage 301. The bottom of the central shaft 401 is snap-fitted into the groove 306 and is rotatably connected to the top of the carriage 301 through the transmission bearing 402.

[0037] Limit shafts 105 are provided on both sides of the arc-shaped hanger 101. The limit shafts 105 are located between the stroke limit safety fixing bolts 102 on both sides. The stroke limit safety fixing bolts 102 are push-type locking bolts. A locking ball head 1021 is provided at the lower end of the push-type locking bolt. A push button 1022 for controlling the locking ball head is provided on the upper surface of the push-type locking bolt, and a rotating nut 1023 fixed on the push-type locking bolt. The rotating nut 1023 is fixedly connected to the bottom end 1011 of the arc-shaped hanger through a chain; An arc-shaped clamping strip 1012 is integrally provided on the lower end surface of the arc-shaped hanger 101. The arc-shaped clamping strip 1012 is snap-fitted into an arc-shaped groove on the outside of the fixture to be lifted. The push-type locking bolt passes through the arc-shaped hanger 101 and is fixedly connected to the fixture to be lifted.

[0038] The bearing groups 202 are provided on both sides of the arc-shaped hanger 101. Each bearing group 202 includes a number of bearings 2021 arranged in a matrix. The bearings 2021 are fixed to the inner side of the carriage 201 through fixed shafts. The carriage 201 rolls in the arc-shaped groove 104 through the bearings 2021.

[0039] The stop bolt 203 includes a hollow cross bar 2031 and an L-shaped bolt body 2032 located inside the hollow cross bar 2031. The L-shaped bolt body 2032 is rotatably connected to the hollow cross bar 2031. The hollow cross bar 2031 is fixedly connected to the side wall of the carriage 201 by a bolt 2033. An arc-shaped rotating end 2034 is provided at the outer end of the hollow cross bar 2031. The L-shaped bolt body 2032 rotates along the arc-shaped rotating end 2034, and locking grooves 2035 are formed on both the upper and lower sides of the arc-shaped rotating end 2034. The L-shaped bolt body 2034 is engaged with the locking grooves 2035. Sealing end caps 205 are fixed at both ends of the carriage 201 close to the limit shaft 105, and scale index arrows 206 are provided on the sealing end caps 205.

[0040] The anti-loosening screw 304 includes a nut 3041 and a special-shaped column body 3042 integrally provided below the nut 3041. Narrow notches 3043 and wide notches 3044 are formed on both sides of the special-shaped column body along the rotation axis. The lower end of the special-shaped column body 3042 is an arc-shaped notch 3045. The special-shaped column body 3042 is engaged with the circumferential groove 305.

[0041] A level 307 is provided at the upper end of the carriage 301. Digital scales 308 are engraved on both sides of the carriage 301 along the arc-shaped hanger 101. The digital scales 308 are located at the lower end of the side of the carriage 301, and handles 309 are fixed above the digital scales 308.

[0042] A retractable dust cover 310 is provided at the bottom of the carriage 301.

[0043] The lifting ring 404 includes a circular ring 4041, a base 4042 integrally provided with the circular ring 4041, and a connecting shaft 4043 provided below the base. A slot 4011 is formed inside the central shaft 401. The connecting shaft 4043 is inserted into the slot 4011 and fixedly connected to the slot 4011. The lifting hook unit 4 further includes a dust cover 405. The dust cover 405 is fixedly connected to the upper end of the central shaft 401. A toothed anti-loosening screw 5 is fixed between the base 4042 and the dust cover 405. An end seal ring 6 is fixed between the dust cover 405 and the upper end face of the connecting shaft 4043. A circumferential seal ring 7 is also provided between the circumference of the central shaft 401 and the dust cover 405. A circumferential protrusion 4051 is provided inside the dust cover 405, and an annular groove is formed at the matching position of the central shaft 401. The circumferential protrusion 4051 is engaged with the annular groove.

[0044] A fixing pin 8 is provided on the side of the central shaft 401 for fixing the central shaft.

[0045] Two safety signs 9 are also marked on the lifting tool to fully consider the safety and reliability of the lifting tool and ensure the smoothness of the lifting process to the greatest extent.

[0046] The specific operation steps of the present invention are as follows: Before installing the fixture, fix the carriage rolling alignment unit 2 through the stop bolt 203. The lifting machine moves the spreader to a suitable position. An arc-shaped clamping strip 1012 is integrally arranged on the lower end surface of the arc-shaped hanger 101. The arc-shaped clamping strip 1012 is clamped with the arc-shaped groove on the outside of the fixture to be lifted. Then, insert the 2-end stroke limit safety fixing bolt 102 into the fixture. During this process, pay attention to the alignment between the stroke limit safety fixing bolt hole 102 on the arc-shaped hanger and the hole in the clamping device groove. By pressing the button 1022, release the locking ball head 1021 to lock the fixture, that is, complete the connection and fastening of the spreader and the fixture to be lifted. At this time, release the stop bolt 102. Move the connected and fastened fixture and spreader through the lifting machine. During this process, through the arc-shaped hanger 101 in the lifting unit 1 and the bearing group 202 in the rolling alignment unit 2, under the action of the self-weight of the fixture to be lifted, through the self-rolling of the bearing group 202 in the arc-shaped hanger 101, the self-adjustment of the positions of the Y-axis and Z-axis can be realized. At the same time, the self-rolling of the bearing group 202 in the arc-shaped hanger 101 naturally causes the T-shaped seat 204 to rotate on the rotating shaft 303, achieving the purpose of self-adjusting the position of the X-axis. After adjustment, fix the rolling alignment unit 2 through the stop bolt 102. After the center of gravity of the spreader and the fixture is adjusted, the lifting machine moves the two that are connected and fixed to the equipment to be assembled. After the fixture is installed, loosen the stroke limit safety fixing bolt 102 and the stop bolt 203. The lifting machine lifts the spreader and separates it from the fixture, that is, complete the quick and simple disassembly operation.

[0047] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A quick-detachable arc-shaped sling that can adjust its center of gravity, characterized in that: It includes a hoisting unit, a rolling centering unit, a transverse centering unit and a hook unit. The hoisting unit includes an arc-shaped hanger, travel limit safety fixing bolts fixed on both sides of the arc-shaped hanger and a fixed limit hole opened in the middle of the arc-shaped hanger. Arc-shaped grooves are opened on both sides of the arc-shaped hanger. The rolling centering unit includes a slide, a bearing group fixed on both sides of the slide, and a stop bolt fixed on one side of the slide, the bearing group is respectively connected to the arc grooves on both sides of the arc hanger in a rolling manner, the stop bolt is fixed in a fixed limit hole in the middle of the arc hanger, a T-shaped seat is fixed on the slide, and the T-shaped seat is rotatably connected to the transverse centering unit; The transverse centering unit includes a carriage, end covers fixed at both ends of the carriage, a rotating shaft arranged inside the carriage, and a locking screw fixed at one end of the rotating shaft, the two ends of the rotating shaft are connected to the two ends of the carriage for rotation through rolling bearings fixed inside the end covers, a circumferential groove is provided on one side of the rotating shaft close to the locking screw, and the locking screw is slidably connected to the circumferential groove; The hook unit includes a central shaft, a transmission bearing, a connecting seat from the inside to the outside, and also includes a lifting ring fixed to the upper end of the central shaft. The connecting seat is fixedly connected to the top of the car in the transverse alignment unit. A groove is provided on the top of the car. The bottom of the central shaft is engaged with the groove and is rotatably connected to the top of the car through the transmission bearing.

2. The quick-detachable arc-shaped sling capable of adjusting the center of gravity by itself according to claim 1, characterized in that: Limit shafts are arranged on both sides of the arc hanger, and the limit shafts are located between the travel limit safety fixing bolts on both sides, and the travel limit safety fixing bolts are push-type locking bolts, and the lower end of the push-type locking bolts is provided with a locking ball head, and the top of the push-type locking bolts is provided with a pressing button for controlling the locking ball head, and a rotating nut fixed on the push-type locking bolt, and the rotating nut is fixedly connected to the bottom end of the arc hanger through a chain; the lower end surface of the arc hanger is integrally provided with an arc clamping strip, and the arc clamping strip is clamped with the arc groove on the outside of the clamp to be hung, and the push-type locking bolt passes through the arc hanger and is fixedly connected to the clamp to be hung.

3. The quick-detachable arc-shaped sling capable of adjusting the center of gravity by itself according to claim 1, characterized in that: The bearing groups are arranged on both sides of the arc-shaped hanger, and the bearing groups on each side include a plurality of bearings arranged in a matrix. The bearings are fixed to the inner side of the slide through a fixed shaft, and the slide rolls in the arc-shaped groove through the bearings.

4. The quick-detachable arc-shaped sling capable of adjusting the center of gravity by itself according to claim 1, characterized in that: The stop bolt includes a hollow cross bar and an L-shaped bolt body located inside the hollow cross bar, the L-shaped bolt body is rotatably connected to the hollow cross bar, the hollow cross bar is fixedly connected to the side wall of the slide by bolts, an arc-shaped rotating end is provided at the outer end of the hollow cross bar, the L-shaped bolt body rotates along the arc-shaped rotating end, and locking grooves are provided on the upper and lower sides of the arc-shaped rotating end, and the L-shaped bolt body is clamped in the locking groove; end covers are fixed at both ends of the slide close to the limit axis, and scale indicator arrows are provided on the end covers.

5. The quick-detachable arc-shaped sling capable of adjusting the center of gravity by itself according to claim 1, characterized in that: The anti-loosening screw includes a nut and a special-shaped column integrally arranged under the nut. The special-shaped column is provided with narrow cuts and wide cuts along both sides of the rotating shaft. The lower end of the special-shaped column is an arc cut, and the special-shaped column is clamped with the circumferential groove.

6. A quick-detachable arc-shaped sling capable of automatically adjusting the center of gravity according to claim 1 or 5, characterized in that: A level is arranged at the upper end of the carriage; digital scales are engraved on both sides of the arc-shaped hanger of the carriage, the digital scales are located at the lower end of the side of the carriage, and a handle is fixed above the digital scales.

7. The quick-detachable arc-shaped sling capable of adjusting the center of gravity by itself according to claim 6, characterized in that: A retractable dust cover is arranged at the bottom of the carriage.

8. The quick-detachable arc-shaped sling capable of adjusting the center of gravity by itself according to claim 1, characterized in that: The lifting ring includes a circular ring, a base integrally arranged with the circular ring, and a connecting shaft arranged under the base. A slot is opened inside the central shaft, and the connecting shaft is inserted into the slot and fixedly connected to the slot. The hook unit also includes a dust cover, which is fixedly connected to the upper end of the central shaft. A toothed anti-loosening screw is fixed between the base and the dust cover, a sealing ring is fixed between the dust cover and the upper end surface of the connecting shaft, and a sealing ring is also provided between the circumference of the central shaft and the dust cover. A circumferential protrusion is provided inside the dust cover, and an annular groove is opened at a matching position of the central shaft, and the circumferential protrusion is clamped with the annular groove.

9. A quick-detachable arc-shaped sling capable of automatically adjusting the center of gravity according to claim 1 or 8, characterized in that: A fixing pin is arranged on the side surface of the central axis.

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