A workpiece quenching lifting tool for cranes

Abstract

This invention discloses a workpiece quenching lifting device for cranes, comprising: a lifting frame connected to the drive end of the crane; a lifting point fixedly disposed on the top of the workpiece; a telescopic frame assembly vertically telescopically connected to the bottom end of the lifting frame, the bottom end of the telescopic frame assembly having an opening; a transmission assembly disposed within the telescopic frame assembly, located above the opening; a rotary lock assembly disposed on the telescopic frame assembly, used to lock the telescopic frame assembly after it retracts; and a clamping assembly fixedly disposed on both sides of the opening, used to clamp the lifting point as the opening closes. The lifting device of this invention adopts a purely mechanical structure, realizing automatic lifting and detachment of the workpiece without manual assistance, improving production efficiency and eliminating unnecessary safety hazards.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment technology, and in particular to a workpiece quenching lifting tool for cranes. Background Technology

[0002] Large-volume steel structural workpieces require quenching during processing to improve their hardness and strength. These workpieces are large and heavy, necessitating the use of cranes to lift them into the heating furnace. During hoisting, auxiliary tools are needed to connect the crane hook to the upper part of the workpiece. The entire hooking and unhooking process is done manually, resulting in low efficiency. Furthermore, when the workpiece is removed from the heating furnace, workers are exposed to extremely high temperatures, posing a risk of burns. The high-temperature environment also affects worker operation; incorrect hoisting can easily lead to accidents, posing significant safety hazards. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a workpiece quenching lifting tool for cranes, which adopts a purely mechanical structure, realizes automatic lifting and detachment of workpieces without manual assistance, improves production efficiency, and eliminates unnecessary safety hazards.

[0004] This invention provides a workpiece quenching lifting fixture for cranes, comprising:

[0005] The hanger is connected to the drive end of the crane;

[0006] Lifting points are fixedly installed on the top of the workpiece and are used to lift the workpiece.

[0007] A telescopic frame assembly is vertically telescopically connected to the bottom end of the hanger. The telescopic frame assembly is in an extended state under its own weight. The bottom end of the telescopic frame assembly has an opening that opens as the assembly contracts and closes as it extends. The telescopic frame assembly includes a fixed shaft horizontally fixed to the bottom end of the hanger. A movable shaft is arranged parallel to the fixed shaft directly below it. First connecting plates are symmetrically arranged at both ends of the movable shaft. The middle of each first connecting plate is rotatably sleeved with the movable shaft. Second connecting plates are rotatably sleeved on the movable shaft outside each of the first connecting plates. The plate has a first connecting plate and a second connecting plate located at the same end of the moving shaft arranged in an X shape. A first shaft is provided between the top ends of the two first connecting plates, and a second shaft is provided between the top ends of the two second connecting plates. A third connecting plate is symmetrically provided at both ends between the first shaft and the fixed shaft. The third connecting plate is rotatably sleeved with the fixed shaft and the first shaft respectively. A fourth connecting plate is symmetrically provided at both ends between the second shaft and the fixed shaft. The fourth connecting plate is rotatably sleeved with the fixed shaft and the second shaft respectively. The opening is formed between the bottom ends of the two first connecting plates and the bottom ends of the two second connecting plates.

[0008] A transmission assembly is disposed within the telescopic frame assembly and located above the opening. The transmission assembly descends and presses against the lifting point, causing the opening to open. The transmission assembly includes two transmission plates. The bottom ends of the transmission plates are fixedly sleeved with the moving shaft, and the top ends of the transmission plates are sleeved with the fixed shaft through vertical elongated holes.

[0009] A rotary lock assembly, mounted on the telescopic frame assembly, is used to lock the telescopic frame assembly after it retracts. The rotary lock assembly completes a locking and unlocking switch each time the transmission assembly presses the lifting point and then rises. The rotary lock assembly includes a sleeve disposed between the fixed shaft and the moving shaft. The sleeve is fixedly connected to the fixed shaft via a connecting frame. A lower steering sleeve is fixedly fitted inside the sleeve. The top of the lower steering sleeve has four lower steering grooves evenly distributed circumferentially. An upper steering sleeve is fixedly fitted inside the sleeve above the lower steering sleeve. The bottom of the upper steering sleeve has four upper steering grooves evenly distributed circumferentially. The upper and lower steering grooves are staggered. The bottom of the sleeve is provided with a steering column that extends into the lower steering sleeve and the upper steering sleeve. Symmetrically arranged on both sides of the steering column are transmission columns that extend into the lower steering groove. The transmission columns, after being pressed by the upper and lower steering grooves in sequence, drive the steering column to rotate 90 degrees. A long strip-shaped locking block is fixedly connected to the bottom of the steering column via a connecting column. A contact plate is provided below the locking block. The bottom of the contact plate is fixedly connected to the moving shaft via a connecting rod. An inverted T-shaped slot is provided on the top surface of the contact plate below the locking block. The width of the locking block is smaller than the width of the slot opening, and the length of the locking block is greater than the width of the slot opening.

[0010] The clamping assembly is fixedly installed on both sides of the opening and is used to clamp the lifting point as the opening closes.

[0011] Furthermore, a positioning hole is provided at the top of the lifting point, and a positioning rod is fixedly provided at the bottom of the moving shaft corresponding to the positioning hole. The outer diameter of the bottom end of the positioning rod gradually decreases from top to bottom to form a guide head.

[0012] Furthermore, the lifting point is a column fixedly welded to the top of the workpiece, and the column is provided with a ring groove.

[0013] Furthermore, the clamping assembly includes clamping plates symmetrically arranged on both sides of the opening, and the inner side of the clamping plates is provided with a semi-circular clamping groove that matches the annular groove.

[0014] Furthermore, the hanger, lifting point, telescopic frame assembly, transmission assembly, rotary lock assembly, and clamping assembly are all made of high-temperature resistant alloy materials.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The lifting device of this invention is equipped with a telescopic frame assembly, a transmission assembly, and a rotary lock assembly. It lifts the workpiece by means of lifting points fixed on the workpiece. The automatic engagement and unlocking of the lifting points is achieved through the cooperation between the various components, which can quickly complete the lifting of the workpiece and effectively improve production efficiency. The lifting device of this application adopts a purely mechanical structure, which is safe and reliable. The working process does not require manual assistance, avoids workers from working in high-temperature environments, and eliminates unnecessary safety hazards.

[0017] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0018] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the lifting device.

[0020] Figure 2 A schematic diagram showing the bottom opening of the lifting device in its open state;

[0021] Figure 3 This is a schematic diagram of the main structure of the lifting device;

[0022] Figure 4 This is a side view of the lifting device.

[0023] Figure 5 This is a schematic diagram of the rotary lock assembly.

[0024] Figure 6 This is a cross-sectional structural diagram of the rotary lock assembly;

[0025] Figure 7 This is a schematic diagram of the lower steering sleeve and the upper steering sleeve.

[0026] The diagram labels are as follows: 1. Hanger; 2. Lifting point; 3. Telescopic frame assembly; 4. Transmission assembly; 5. Rotary lock assembly; 6. Clamping assembly; 7. Positioning rod;

[0027] 21. Column; 22. Circular groove;

[0028] 31. Fixed shaft; 32. Moving shaft; 33. First connecting plate; 34. Second connecting plate; 35. First shaft; 36. Second shaft; 37. Third connecting plate; 38. Fourth connecting plate;

[0029] 41. Transmission plate; 42. Long hole;

[0030] 51. Sleeve; 52. Connecting bracket; 53. Lower steering sleeve; 54. Lower steering groove; 55. Upper steering sleeve; 56. Upper steering groove; 57. Steering column; 58. Drive column; 59. Connecting column; 510. Locking block; 511. Contact plate; 512. Connecting rod; 513. Locking groove;

[0031] 61. Card plate; 62. Card slot;

[0032] 71. Guide head. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Please refer to Figures 1-7 An embodiment of the present invention provides a workpiece quenching lifting fixture for a crane, comprising:

[0036] Hanger 1 is connected to the drive end of the crane;

[0037] Lifting point 2 is fixedly set at the top of the workpiece and is used to lift the workpiece.

[0038] The telescopic frame assembly 3 is vertically telescopically connected to the bottom end of the hanger 1. The telescopic frame assembly 3 is in an extended state under its own weight. The bottom end of the telescopic frame assembly 3 is provided with an opening that opens as the telescopic frame assembly 3 contracts and closes as the telescopic frame assembly 3 extends.

[0039] The transmission component 4 is located inside the telescopic frame component 3, above the opening. When the transmission component 4 falls, it presses against the lifting point 2, causing the opening to open.

[0040] The rotary lock assembly 5 is installed on the telescopic frame assembly 5 and is used to lock the telescopic frame assembly 5 after it is retracted. The rotary lock assembly 5 completes the switching between locking and unlocking once each time the transmission assembly 4 presses the lifting point 2 and then lifts.

[0041] The clamping assembly 6 is fixedly installed on both sides of the opening and is used to clamp the lifting point 2 as the opening closes.

[0042] In this embodiment, lifting point 2 is set on the workpiece to be quenched, so that the workpiece can be lifted through lifting point 2. Before lifting the workpiece, the telescopic frame assembly 3 is in a retracted state and locked by the turnlock assembly 5, at which time the opening is open. When lifting the workpiece, the lifting device is lifted by a crane and moved above lifting point 2, and then the lifting device is controlled to fall. As the lifting device falls, lifting point 2 passes through the opening, and the transmission assembly 4 lands on top of the lifting point. As the transmission assembly 4 presses against lifting point 2, the turnlock assembly 5 unlocks. Then the crane lifts the lifting device, the telescopic frame assembly 3 extends under its own weight, the opening closes, and the clamping assembly 6 clamps the lifting point 2, thereby lifting the workpiece and placing it into the heating furnace, completing the lifting of the workpiece.

[0043] After the workpiece falls into the heating furnace, the lifting device continues to be lowered. As the lifting device falls, the transmission component 4 falls on top of the lifting point again. As the transmission component 4 presses against the lifting point 2, the telescopic frame component 3 retracts. After the telescopic frame component 3 retracts to a certain extent, the rotary lock component 5 locks again. At this time, the opening is in the open state, and the lifting device is lifted to complete the separation from the lifting point 2.

[0044] The lifting device of this application achieves automatic engagement and disengagement of lifting point 2 through the cooperation between various components, realizing rapid lifting of workpieces and effectively improving production efficiency; at the same time, the entire lifting process does not require manual assistance, avoiding workers from working in high-temperature environments and eliminating unnecessary safety hazards.

[0045] In a preferred embodiment, such as Figures 1-4 As shown, the telescopic frame assembly 3 includes a fixed shaft 31 horizontally fixed at the bottom of the hanger 1. A movable shaft 32 is arranged parallel to the fixed shaft 31 directly below it. First connecting plates 33 are symmetrically arranged at both ends of the movable shaft 32. The middle of the first connecting plate 33 is rotatably sleeved with the movable shaft 32. Second connecting plates 34 are rotatably sleeved on the movable shaft 32 on the outer side of each of the first connecting plates 33. The first connecting plates 33 and second connecting plates 34 located at the same end of the movable shaft 32 are arranged in an X-shape. A second connecting plate 34 is provided between the top ends of the two first connecting plates 33. A first shaft 35 is provided, and a second shaft 36 is provided between the top ends of two second connecting plates 34. A third connecting plate 37 is symmetrically provided at both ends between the first shaft 35 and the fixed shaft 31. The third connecting plate 37 is rotatably sleeved with the fixed shaft 31 and the first shaft 35 respectively. A fourth connecting plate 38 is symmetrically provided at both ends between the second shaft 36 and the fixed shaft 31. The fourth connecting plate 38 is rotatably sleeved with the fixed shaft 31 and the second shaft 36 respectively. An opening is formed between the bottom ends of the two first connecting plates 33 and the bottom ends of the two second connecting plates 34.

[0046] In this embodiment, the fixed shaft 31 is fixedly connected to the hanger 1, and the movable shaft 32 can move up and down relative to the fixed shaft 31. When the distance between the fixed shaft 31 and the movable shaft 32 is reduced by the transmission assembly 4, the telescopic frame assembly 3 shortens as a whole, the angle between the first connecting plate 33 and the second connecting plate 34 increases, and the opening opens. At this time, the telescopic frame assembly 3 is locked by the rotary lock assembly 5, which facilitates the insertion of the lifting point 2 into the opening at the bottom of the telescopic frame assembly 3.

[0047] As the telescopic frame assembly 3 descends, the transmission assembly 4 abuts against the top of the lifting point 2. With the transmission assembly 4 pressing against the lifting point 2, the rotary lock assembly 5 unlocks, no longer affecting the telescopic frame assembly 3's extension and retraction. At this time, the telescopic frame assembly 3 is lifted by the crane. Under gravity, the distance between the fixed shaft 31 and the moving shaft 32 increases, the telescopic frame assembly 3 extends as a whole, and the angle between the first connecting plate 33 and the second connecting plate 34 decreases, closing the opening. Thus, the clamping assembly 6 clamps the lifting point 2, achieving automatic locking of the lifting point 2. The heavier the workpiece, the better the locking effect.

[0048] After the workpiece is hoisted, the telescopic frame assembly 3 moves by falling and rising again. The rotary lock assembly 5 locks the retracted telescopic frame assembly 3 again, the opening opens, and it is separated from the hoisting point 2, returning to the initial state for the next hoisting operation.

[0049] In a preferred embodiment, such as Figures 1-7 As shown, the rotary lock assembly 5 includes a sleeve 51 disposed between the fixed shaft 31 and the moving shaft 32. The sleeve 51 is fixedly connected to the fixed shaft 31 via a connecting bracket 52. A lower steering sleeve 53 is fixedly sleeved inside the sleeve 51. The top of the lower steering sleeve 53 has four lower steering grooves 54 evenly distributed circumferentially. An upper steering sleeve 55 is fixedly sleeved inside the sleeve 51 above the lower steering sleeve 53. The bottom of the upper steering sleeve 55 has four upper steering grooves 56 evenly distributed circumferentially. The upper steering grooves 56 are staggered with the lower steering grooves. A steering column 57 is provided at the bottom of the sleeve 51, extending into the lower steering sleeve 53 and the upper steering sleeve 55. The steering column 57 has two sides... A transmission column 58 is symmetrically arranged and extends into the lower steering groove 54. After being squeezed by the upper steering groove 56 and the lower steering groove 54 in sequence, the transmission column 58 drives the steering column 57 to rotate 90 degrees. The bottom end of the steering column 57 is fixedly connected to a long strip-shaped locking block 510 through a connecting column 59. A contact plate 511 is arranged below the locking block 510. The bottom of the contact plate 511 is fixedly connected to the moving shaft 32 through a connecting rod 512. The top surface of the contact plate 511 is located below the locking block 510 and has an inverted T-shaped locking groove 513. The width of the locking block 510 is smaller than the width of the opening of the locking groove 513, and the length of the locking block 510 is greater than the width of the opening of the locking groove 513.

[0050] In this embodiment, the pivot lock assembly 5 is locked in the initial state of the lifting device, with the locking block 510 locked in the slot 513, fixing the fixed shaft 31 and the moving shaft 32, thus locking the telescopic frame assembly 3 in its retracted state. As the lifting device descends, the transmission assembly 4 abuts against the top of the lifting point 2 and cannot descend further, meaning the moving shaft 32 cannot move further down. The fixed shaft 31 continues to descend, causing the locking block 510 to abut against the contact plate 511. The transmission columns 58 on both sides of the steering column 57 disengage from the lower steering groove 54 and embed themselves in the upper steering groove 56. Under the pressure of the upper steering groove 56, the steering column 57 rotates until the transmission column 58 abuts against the bottom of the upper steering groove 56. Then, the lifting device is lifted, the upper steering sleeve 55 moves upward, and the transmission column 58 falls back into the lower steering groove 54. Under the pressure of the lower steering groove 54, the steering column 57 rotates again until the transmission column 58 embeds into the bottom of the lower steering groove 54, and the steering column 57 rotates 90 degrees. At this point, the card block 510 rotates 90 degrees and can be ejected from the card slot 513, completing the unlocking process.

[0051] After the transmission component 4 presses against the lifting point and lifts, the locking block 510 engages in the locking slot 513 and rotates 90 degrees again to complete the locking. The structure is reasonably designed, achieving automatic locking and unlocking of the telescopic frame component 3 through a purely mechanical structure, ensuring safety and reliability.

[0052] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, the transmission assembly 4 includes two transmission plates 41. The bottom ends of the transmission plates 41 are fixedly sleeved with the moving shaft 32, and the top ends of the transmission plates 41 are sleeved with the fixed shaft 31 through vertical elongated holes 42.

[0053] In this embodiment, as the lifting device descends, the lifting point 2 enters the opening, and then the bottom ends of the two transmission plates 41 abut against the top of the lifting point 2, preventing the moving shaft 32 from descending further. However, the fixed shaft 31 can continue to descend along the elongated hole 42, thereby causing the telescopic frame assembly 3 to retract. Each descent and subsequent re-eruption of the transmission plate 41 triggers the switching between unlocking and locking of the rotary lock assembly 5.

[0054] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, a positioning hole is provided at the top of the lifting point 2, and a positioning rod 7 is fixedly provided at the bottom of the moving shaft 32 corresponding to the positioning hole. The outer diameter of the bottom end of the positioning rod 7 gradually decreases from top to bottom to form a guide head 71.

[0055] In this embodiment, during the clamping of lifting point 2, as the telescopic frame assembly 3 descends, the positioning rod 7 is inserted into the positioning hole under the guidance of the guide head 71, thus serving as a positioning guide. This ensures the accurate alignment of the clamping assembly 6 with lifting point 2 and also guarantees that the transmission assembly 4 accurately lands on top of lifting point 2, thereby enabling smooth switching between locking and unlocking of the rotary lock assembly 5.

[0056] In a preferred embodiment, such as Figure 1 As shown, lifting point 2 is a column 21 fixedly welded to the top of the workpiece, and a ring groove 22 is provided on the column 21. This facilitates the clamping assembly 6 to clamp the column 21, thereby lifting the workpiece.

[0057] In a preferred embodiment, such as Figure 1 As shown, the clamping assembly 6 includes clamping plates 61 symmetrically arranged on both sides of the opening. The inner side of the clamping plates 61 is provided with a semi-circular clamping groove 62 that matches the annular groove 22. When the opening is closed, the two clamping plates 61 also close, and the clamping groove 62 is engaged with the annular groove 22, thereby firmly clamping the column 21.

[0058] In a preferred embodiment, the lifting frame 1, lifting point 2, telescopic frame assembly 3, transmission assembly 4, rotary lock assembly 5, and clamping assembly 6 are all made of high-temperature resistant alloy materials. During the quenching process, this ensures the performance of the lifting equipment itself, preventing performance degradation or failure due to high temperatures, thus avoiding safety accidents and unnecessary economic losses.

[0059] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A workpiece quenching lifting tool for a crane, characterized in that, include: The hanger is connected to the drive end of the crane; Lifting points are fixedly installed on the top of the workpiece and are used to lift the workpiece. A telescopic frame assembly is vertically telescopically connected to the bottom end of the hanger. The telescopic frame assembly is in an extended state under its own weight. The bottom end of the telescopic frame assembly has an opening that opens as the assembly contracts and closes as it extends. The telescopic frame assembly includes a fixed shaft horizontally fixed to the bottom end of the hanger. A movable shaft is arranged parallel to the fixed shaft directly below it. First connecting plates are symmetrically arranged at both ends of the movable shaft. The middle of each first connecting plate is rotatably sleeved with the movable shaft. Second connecting plates are rotatably sleeved on the movable shaft outside each of the first connecting plates. The plate has a first connecting plate and a second connecting plate located at the same end of the moving shaft arranged in an X shape. A first shaft is provided between the top ends of the two first connecting plates, and a second shaft is provided between the top ends of the two second connecting plates. A third connecting plate is symmetrically provided at both ends between the first shaft and the fixed shaft. The third connecting plate is rotatably sleeved with the fixed shaft and the first shaft respectively. A fourth connecting plate is symmetrically provided at both ends between the second shaft and the fixed shaft. The fourth connecting plate is rotatably sleeved with the fixed shaft and the second shaft respectively. The opening is formed between the bottom ends of the two first connecting plates and the bottom ends of the two second connecting plates. A transmission assembly is disposed within the telescopic frame assembly and located above the opening. The transmission assembly descends and presses against the lifting point, causing the opening to open. The transmission assembly includes two transmission plates. The bottom ends of the transmission plates are fixedly sleeved with the moving shaft, and the top ends of the transmission plates are sleeved with the fixed shaft through vertical elongated holes. A rotary lock assembly, mounted on the telescopic frame assembly, is used to lock the telescopic frame assembly after it retracts. The rotary lock assembly completes a locking and unlocking switch each time the transmission assembly presses the lifting point and then rises. The rotary lock assembly includes a sleeve disposed between the fixed shaft and the moving shaft. The sleeve is fixedly connected to the fixed shaft via a connecting frame. A lower steering sleeve is fixedly fitted inside the sleeve. The top of the lower steering sleeve has four lower steering grooves evenly distributed circumferentially. An upper steering sleeve is fixedly fitted inside the sleeve above the lower steering sleeve. The bottom of the upper steering sleeve has four upper steering grooves evenly distributed circumferentially. The upper and lower steering grooves are staggered. The bottom of the sleeve is provided with a steering column that extends into the lower steering sleeve and the upper steering sleeve. Symmetrically arranged on both sides of the steering column are transmission columns that extend into the lower steering groove. The transmission columns, after being pressed by the upper and lower steering grooves in sequence, drive the steering column to rotate 90 degrees. A long strip-shaped locking block is fixedly connected to the bottom of the steering column via a connecting column. A contact plate is provided below the locking block. The bottom of the contact plate is fixedly connected to the moving shaft via a connecting rod. An inverted T-shaped slot is provided on the top surface of the contact plate below the locking block. The width of the locking block is smaller than the width of the slot opening, and the length of the locking block is greater than the width of the slot opening. The clamping assembly is fixedly installed on both sides of the opening and is used to clamp the lifting point as the opening closes.

2. The workpiece quenching lifting fixture for cranes according to claim 1, characterized in that, The top of the lifting point is provided with a positioning hole, and the bottom of the moving shaft is fixedly provided with a positioning rod corresponding to the positioning hole. The outer diameter of the bottom end of the positioning rod gradually decreases from top to bottom to form a guide head.

3. The workpiece quenching lifting fixture for cranes according to claim 1, characterized in that, The lifting point is a column fixedly welded to the top of the workpiece, and the column is provided with a ring groove.

4. The workpiece quenching lifting fixture for cranes according to claim 3, characterized in that, The clamping assembly includes clamping plates symmetrically arranged on both sides of the opening, and the inner side of the clamping plates is provided with a semi-circular clamping groove that matches the annular groove.

5. The workpiece quenching lifting fixture for cranes according to claim 1, characterized in that, The hanger, lifting point, telescopic frame assembly, transmission assembly, rotary lock assembly, and clamping assembly are all made of high-temperature resistant alloy materials.

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