Lifting hook with double protection functions

Abstract

The invention provides a lifting hook with double protection functions, which relates to the technical field of lifting and comprises a handheld handle, a winder, an overturning assembly and a protection assembly, a lifting belt is mounted in the winder; a lifting hook is fixedly connected to the outer portion of the handheld handle, the overturning assembly is installed on the outer portion of the lifting hook and comprises a first gear rotationally connected to the outer wall of the lifting hook, and an overturning plate is fixedly connected to the outer wall of the first gear. According to the scheme, the grip is finally pressed to drive the turning plate to open the lifting hook firstly, and then when the grip is turned over, the protective gear ring can be controlled to rotate anticlockwise to open the lifting hook again through linkage of the first gear and the second gear; therefore, compared with a traditional single hook and a hook arranged on a single plate, through two-section linkage opening and automatic reset linkage closing, secondary protection can be carried out under high-altitude operation, and therefore it can be guaranteed that the whole lifting belt on the lower portion works more stably.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting, and particularly relates to a lifting hook with a dual protection function. Background Art

[0002] A hook is the most common type of lifting tool in a hoisting machine. The hook is often suspended on the steel wire rope of the hoisting mechanism by means of components such as a pulley block. A single hook is simple to manufacture and convenient to use. Generally, a hook is used in combination with a steel cable or a lifting belt to hoist and suspend an object.

[0003] Publication No. CN217732425U discloses a single-hook assembly that is convenient for replacing the hook, which relates to the technical field of single-hook assemblies, specifically a single-hook assembly that is convenient for replacing the hook, including a hook housing. A runner is arranged on the inner side wall of the hook housing through a rotating shaft. An installation groove is arranged on the inner side wall of the hook housing. An installation door is arranged on the outer surface of the hook housing. A limiting rod is arranged on one side surface of the installation door. A limiting block is arranged at one end of the telescopic rod. A multi-stage tapered column is arranged on the inner side wall of the installation groove. A first tapered roller bearing is arranged on the outer surface of the multi-stage tapered column. A second tapered roller bearing is arranged on the outer surface of the multi-stage tapered column. A steel wire rope is arranged on the outer surface of the runner. A displacement sensor is arranged on the inner bottom wall of the detection device housing. A steel wire rope detection device is arranged on the inner side wall of the detection device housing, which has the effects of facilitating the automatic detection of the height of the hook, facilitating the automatic detection of the breakage of the steel wire rope, and facilitating the replacement of the hook.

[0004] In the related art, when the hook is suspended, a baffle that moves in one direction is often used to block the opening of the hook and the carrier. In this way, if the hook shakes or tilts, the safety of the baffle that moves in one direction for blocking is relatively poor, especially prone to danger during high-altitude operations.

[0005] Therefore, it is necessary to provide a lifting hook with a dual protection function to solve the above technical problems. Summary of the Invention

[0006] The present invention provides a lifting hook with a dual protection function, which solves the technical problems in the related art that when the hook shakes or tilts, relying on the baffle that moves in one direction for blocking, the safety is relatively poor, especially prone to danger during high-altitude operations.

[0007] To solve the above technical problems, a lifting hook with a dual protection function provided by the present invention includes a hand grip, a reel, a flipping assembly, and a protection assembly;

[0008] A lifting belt is installed inside the reel;

[0009] A hook is fixedly connected to the outside of the hand-held handle. The flipping assembly is installed outside the hook. The flipping assembly includes a first gear rotatably connected to the outer wall of the hook. A flap is fixedly connected to the outer wall of the first gear. A grip is fixedly connected to the outer wall of the flap. An adapter frame is fixedly connected to the outer wall of the hand-held handle and below the first gear. A return spring is installed inside the adapter frame. An adapter plate is fixedly connected to the outer wall of the grip.

[0010] The protection assembly is installed outside the hook and above the flipping assembly. The protection assembly includes a second gear rotatably connected to the outer wall of the hook and above the first gear. Positioning frames are fixedly connected to both side walls of the hook. A protection gear ring is meshed and connected above the second gear. An auxiliary wheel is rotatably connected to the inner wall of the protection gear ring. A limiting plate is fixedly connected to the outer wall of the protection gear ring.

[0011] Preferably, the bottom of the adapter plate extends into the adapter frame, and the bottom end of the return spring is fixedly connected to the outer wall of the adapter plate.

[0012] Preferably, the first gear and the second gear are meshed with each other, and the limiting plate is slidably connected to the inner wall of the positioning frame and the outer walls of both sides of the hook.

[0013] Preferably, it further includes a lubrication assembly and a locking assembly. The locking assembly includes a positioning box fixedly arranged on the outer wall of the hook. The lubrication assembly includes an oil box fixedly arranged on the outer wall of the positioning box. A limiting groove is formed on the front outer wall of the hook. A rubber bladder is slidably connected inside the limiting groove. A hose is hermetically installed on the outer wall of the oil box. A lubricating pipe is hermetically installed on the outer wall of the rubber bladder. Three clamping rings are fixedly arranged on the front outer wall of the hook.

[0014] One end of the outer wall of the protection gear ring is rotatably connected with a pressing plate. A knob penetrates through the pressing plate, and the knob is threadedly connected to the protection gear ring.

[0015] Preferably, the outlet end of the hose is hermetically installed with the rubber bladder. The lubricating pipe penetrates through the inside of the three clamping rings, and the outlet end of the lubricating pipe is aligned with the second gear.

[0016] Preferably, the shape of the limiting groove is a "T" type structure. The rubber bladder is slidably connected to the limiting groove through a slider adapted to the limiting groove, and a positioning bolt for locking is threadedly connected to the outer wall of the slider.

[0017] Preferably, a clamping plate is slidably connected inside the positioning box. A limiting post is fixedly arranged at the top of the clamping plate. A limiting spring is sleeved on the outer wall of the limiting post.

[0018] The bottom end of the grip is rotatably connected with a rotating plate. A baffle is fixedly arranged on the outer wall of the grip. An elastic band is fixedly arranged at the bottom end of the rotating plate. A locking plate is fixedly arranged at the tail end of the elastic band. A locking block is fixedly arranged on the outer wall of the locking plate.

[0019] Preferably, the bottom of the baffle extends to the outer wall of the rotating plate. The bottom of the clamping plate is of an inclined surface structure. The upper and lower ends of the limiting spring are fixedly connected with the upper surface of the positioning box and the limiting column respectively.

[0020] Compared with the related art, the lifting hook with dual protection functions provided by the present invention has the following

[0021] Beneficial effects:

[0022] Only by pressing the grip, the flap will be driven to open the hook first. Secondly, when the grip rotates, through the linkage of the first gear and the second gear, the protective gear ring can be controlled to rotate counterclockwise to open the hook again. Therefore, such a design, compared with the traditional single hook and single plate hook, through the two-stage linkage opening and automatic reset linkage closing, can provide secondary protection during high-altitude operations, so as to ensure that the entire lifting belt suspended below is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0024] Figure 1 It is the best structural schematic diagram provided by the present invention;

[0025] Figure 2 It is Figure 1 the structural schematic diagram of the flipping assembly and the protection assembly shown;

[0026] Figure 3 It is Figure 2 the side view structural schematic diagram of the connection frame shown;

[0027] Figure 4 It is Figure 2 the working principle schematic diagram of the flipping assembly and the protection assembly shown, where (a) is the plan view of the hook before working, and (b) is the plan view of the state when the flap and the connection gear ring are linked to open the hook when pressing the grip;

[0028] Figure 5 It is Figure 1 the structural schematic diagram of the lubrication assembly shown;

[0029] Figure 6 is Figure 1 a detailed structural schematic diagram of the connection between the protective gear ring and the extrusion plate shown in the figure;

[0030] Figure 7 is Figure 5 and Figure 6 a working principle diagram of the lubrication component shown in the figure, where (c) is a plan view of the working state when the protective gear ring drives the extrusion plate to extrude the rubber bladder during rotation, and (d) is a plan view of the working state when the extrusion degree of the rubber bladder 33 is changed by adjusting the angle of the extrusion plate.

[0031] Figure 8 is Figure 1 a detailed structural schematic diagram of the connection between the grip and the rotating plate shown in the figure;

[0032] Figure 9 is Figure 1 a sectional structural schematic diagram of the locking component shown in the figure;

[0033] Figure 10 is Figure 1 and Figure 8 a schematic diagram of the working state of secondary locking when the rotating plate is flipped shown in the figure;

[0034] Figure 11 is Figure 10 a structural schematic diagram of the connection between the lock block and the clamping plate shown in the figure.

[0035] Explanation of the reference numerals in the attached drawings:

[0036] 1. Handheld handle, 2. Reel;

[0037] 3. Lubrication component, 31. Oil box, 32. Limit groove, 33. Rubber bladder, 34. Positioning bolt, 35. Hose, 36. Snap ring, 37. Lubrication pipe;

[0038] 4. Locking component, 41. Positioning box, 42. Clamping plate, 43. Limit post, 44. Limit spring;

[0039] 5. Lifting belt, 6. Hook;

[0040] 7. Flipping component, 71. First gear, 72. Flap, 73. Grip, 74. Connecting frame, 75. Return spring, 76. Connecting plate;

[0041] 8. Protective component, 81. Second gear, 82. Positioning frame, 83. Protective gear ring, 84. Limit plate, 85. Auxiliary wheel;

[0042] 9. Extrusion plate, 10. Knob;

[0043] 11. Rotating plate, 12. Baffle, 13. Elastic band, 14. Locking plate, 15. Lock block.

[0044] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] First embodiment:

[0047] Please refer to Figures 1 to 4 , the present invention provides a lifting hook with a dual protection function, including a hand-held handle 1, a reel 2, a flipping assembly 7 and a protection assembly 8;

[0048] A lifting belt 5 is installed inside the reel 2;

[0049] A hook 6 is fixedly connected to the outside of the hand-held handle 1. The flipping assembly 7 is installed outside the hook 6. The flipping assembly 7 includes a first gear 71 rotatably connected to the outer wall of the hook 6. A flap 72 is fixedly connected to the outer wall of the first gear 71. A grip 73 is fixedly connected to the outer wall of the flap 72. An adapter frame 74 is fixedly connected to the outer wall of the hand-held handle 1 and below the first gear 71. A return spring 75 is installed inside the adapter frame 74. A connection plate 76 is fixedly connected to the outer wall of the grip 73.

[0050] Combined with (a) in 4: If the staff needs to install the hook 6 and the safest carrier before work, the flap 72 before installation closes the opening position of the hook 6.

[0051] Combined with Figure 4 in (b): When the grip 73 is pressed counterclockwise, the flap 72 will be driven to flip simultaneously, then the opening of the hook 6 will be opened, and when the grip 73 is pressed, the connection plate 76 will simultaneously flip to control the compression movement of the return spring 75 inside the adapter frame 74.

[0052] The bottom of the connection plate 76 extends into the adapter frame 74, and the bottom end of the return spring 75 is fixedly connected to the outer wall of the connection plate 76.

[0053] In this embodiment: before working, the user holds the handle 1 and then presses the handle 73 to make the flap 72 flip. At this time, the flap 72 opens the hook 6, which makes it convenient for the user to place the safety carrier inside the hook 6. When the hook 6 is completely installed with the safety carrier, the reset spring 75 will contact the connecting plate 76 to drive the handle 73 to reset the flap 72 and close the hook 6.

[0054] The protection component 8 is installed on the outside of the hook 6 and is located above the flip component 7. The protection component 8 includes a second gear 81 rotatably connected to the outer wall of the hook 6 and located above the first gear 71. The two side walls of the hook 6 are fixedly connected with a positioning frame 82. A protection tooth ring 83 is meshed and connected above the second gear 81. The inner wall of the protection tooth ring 83 is rotatably connected with an auxiliary wheel 85, and the outer wall of the protection tooth ring 83 is fixedly connected with a limiting plate 84.

[0055] Combination Figure 4 (a) in the figure: when the flap 72 and the opening position of the hook 6 are closed, the protective toothed ring 83 will also close the opening position of the hook 6.

[0056] Combination Figure 4 (b) in it: When the flap 72 flips, the first gear 71 will rotate counterclockwise synchronously. At this time, the counterclockwise rotating first gear 71 will control the second gear 81 to rotate clockwise. At this time, the clockwise rotating second gear 81 will drive the protective gear ring 83 to rotate counterclockwise to fully open the opening of the hook 6.

[0057] The first gear 71 and the second gear 81 are meshed with each other, and the limiting plate 84 is slidably connected to the inner wall of the positioning frame 82 and the outer walls on both sides of the hook 6 .

[0058] It can be understood that the connecting frame 74 and the first gear 71 have the same axis, so when the first gear 71 rotates in a circle, the connecting plate 76 will also move in a circle inside the connecting frame 74, and the protective toothed ring 83, the positioning frame 82 and the hook 6 are all in a sliding relationship, thereby ensuring the rotation stability of the protective toothed ring 83. Secondly, the setting of the auxiliary wheel 85 can also ensure that the safety vehicle can smoothly enter the interior of the hook 6.

[0059] In this embodiment: before use, the user only needs to press the handle 73, which will drive the flap 72 to first open the hook 6. Secondly, when the handle 73 is flipped, the first gear 71 and the second gear 81 are linked to control the protective toothed ring 83 to rotate counterclockwise to open the hook 6 again. Therefore, compared with the traditional single hook and single plate setting hook, this design uses two stages of linked opening and automatic reset to close the linked closure, thereby ensuring that the entire lifting belt 5 below works more stably.

[0060] Second embodiment:

[0061] Please combine with Figures 5 to 7 : It further includes a lubricating component 3 and a locking component 4. The locking component 4 includes a positioning box 41 fixedly arranged on the outer wall of the hook 6. The lubricating component 3 includes an oil box 31 fixedly arranged on the outer wall of the positioning box 41. A limiting groove 32 is formed on the front outer wall of the hook 6. A rubber bladder 33 is slidably connected inside the limiting groove 32. A hose 35 is sealingly installed on the outer wall of the oil box 31. A lubricating pipe 37 is sealingly installed on the outer wall of the rubber bladder 33. Three snap rings 36 are fixedly arranged on the front outer wall of the hook 6;

[0062] One end of the outer wall of the protective gear ring 83 is rotatably connected with a pressing plate 9. A knob 10 penetrates through the pressing plate 9. The knob 10 is threadedly connected with the protective gear ring 83.

[0063] Please refer to Figure 7 in (c): When in the first embodiment, if the protective gear ring 83 rotates to the left, the pressing plate 9 will also move following the rotation of the protective gear ring 83. When the pressing plate 9 moves to the position of the rubber bladder 33, the pressing plate 9 will forcefully squeeze and compress the rubber bladder 33. Once the rubber bladder 33 is compressed, the rubber bladder 33 will squeeze the internal lubricating oil through the lubricating pipe 37 and then extrude it through the outlet end onto the second gear 81.

[0064] Please refer to Figure 6 and Figure 7 in (d): In the actual use by the user, if the second gear 81 rotates very smoothly, there is no need for continuous lubrication. In this way, the user can freely rotate the knob 10 to adjust the angle of the pressing plate 9, so as to control the degree of extrusion of the pressing plate 9 on the rubber bladder 33. When the degree of extrusion is large, the amount of oil sprayed is large; when the degree of extrusion is small, the amount of oil sprayed is small. At the same time, it is also possible to adjust and cancel the extrusion of the pressing plate 9.

[0065] The outlet end of the hose 35 is sealingly installed with the rubber bladder 33. The lubricating pipe 37 passes through the inside of the three snap rings 36, and the outlet end of the lubricating pipe 37 is aligned with the second gear 81.

[0066] The shape of the limiting groove 32 is a "T" - shaped structure. The rubber bladder 33 is slidably connected with the limiting groove 32 through a slider adapted to the limiting groove 32, and a positioning bolt 34 with a locking function is threadedly connected to the outer wall of the slider.

[0067] Preferably, the oil box 31 can be connected and communicated with the rubber bladder 33 by a one - way valve.

[0068] It can be understood that: using three snap rings 36 to limit the lubricating pipe 37 can ensure that the lubricating pipe 37 is more stable and prevent it from falling off;

[0069] Secondly, the rubber bag 33 and the limiting groove 32 are slidably installed, and the user can rotate the positioning bolt 34 to freely install and disassemble the rubber bag 33. In this way, once the rubber bag 33 is squeezed and fatigued, it is also convenient for the user to quickly replace and disassemble it.

[0070] This embodiment: Compared with the traditional design, the user will repeatedly use the flip component 7 and the protective component 8 during the operation of the first embodiment, so the meshing between the meshing connectors will be unstable. Therefore, when the protective tooth ring 83 is opened, it will control the rubber bag 33 to add lubricating oil to the second gear 81. The purpose of this is to ensure that the meshing connector of the hook 6 can rotate more smoothly, and the user can save more effort when pressing, effectively avoiding the effort of pressing, and at the same time it can also protect the hook 6 connector well.

[0071] Third embodiment:

[0072] Please combine Figure 8 and Figure 11 : A card plate 42 is slidably connected to the interior of the positioning box 41, a limiting column 43 is fixedly arranged on the top of the card plate 42, and a limiting spring 44 is sleeved on the outer wall of the limiting column 43;

[0073] The bottom end of the handle 73 is rotatably connected to a rotating plate 11, an outer wall of the handle 73 is fixedly provided with a baffle 12, an elastic band 13 is fixedly provided at the bottom end of the rotating plate 11, a locking plate 14 is fixedly provided at the tail end of the elastic band 13, and a locking block 15 is fixedly provided on the outer wall of the locking plate 14.

[0074] See also Figure 8 and Figure 10 : If the user is working at a very high altitude, the user can lock the hook 6. When in use, the user rotates the rotating plate 11 clockwise at the hinged position between the handle 73 and the rotating plate 11 to allow the elastic band 13 and the locking plate 14 to approach the locking assembly 4.

[0075] Preferably, the elastic band 13 may be preferably an elastic braided band with high shaping toughness and strength.

[0076] The bottom of the baffle 12 extends to the outer wall of the rotating plate 11 , the bottom of the clamping plate 42 is in an inclined structure, and the upper and lower ends of the limit spring 44 are fixedly connected to the upper surface of the positioning box 41 and the limit column 43 .

[0077] See also Figure 9 and Figure 11: When the lock plate 14 moves to the same horizontal position as the positioning box 41, the user needs to push the entire lock plate 14. When the lock block 15 on the lock plate 14 enters the interior of the positioning box 41, the outer wall of the lock block 15 will abut against the inclined surface of the clamping plate 42, and at this time, the clamping plate 42 will be controlled to rise. When the clamping plate 42 rises, the limit spring 44 rises and stretches. When the lock block 15 completely enters the interior of the positioning box 41, the clamping plate 42 will smoothly descend to lock the lock block 15, and at this time, the limit spring 44 will reset to its initial state.

[0078] In this embodiment: When the user operates at a medium or low height, the user can rely on the flipping assembly 7 and the protection assembly 8 for protection. If operating at a high altitude, the rotating plate 11 can be flipped according to the actual situation to control the complete locking of the lock block 15 and the locking assembly 4, so that a fixed closed loop is formed at the opening position of the lifting hook 6, ensuring 100% safety for the user in the high-altitude working environment.

[0079] Please refer to Figures 1 to 11 , the working principle of a lifting hook with a dual protection function provided by the present invention is as follows:

[0080] Step S1: If the staff needs to install the lifting hook 6 and the safest carrier before work, the flap 72 before installation closes the opening position of the lifting hook 6. When the grip 73 is pressed counterclockwise, the flap 72 will be driven to perform a flipping movement simultaneously, and the opening of the lifting hook 6 will be opened. And when the grip 73 is pressed, the connecting plate 76 will simultaneously flip to control the reset spring 75 to compress inside the connecting frame 74. When the flap 72 is flipping, the first gear 71 will rotate counterclockwise synchronously. At this time, the counterclockwise rotating first gear 71 will control the second gear 81 to rotate clockwise. At this time, the clockwise rotating second gear 81 will drive the protection gear ring 83 to rotate counterclockwise to completely open the opening of the lifting hook 6.

[0081] Step S2: During the process of the protection gear ring 83 rotating to the left, the pressing plate 9 will also move along with the rotation of the protection gear ring 83. When the pressing plate 9 moves to the position of the rubber bladder 33, the pressing plate 9 will forcefully squeeze the rubber bladder 33 to compress. Once the rubber bladder 33 is compressed, the rubber bladder 33 will squeeze the lubricating oil inside through the lubricating pipe 37 and then squeeze it onto the second gear 81 through the outlet end.

[0082] Step S3: If the user is working at a very high altitude, the user can lock the lifting hook 6. When in use, rotate the rotating plate 11 clockwise at the hinge position between the grip 73 and the rotating plate 11 to make the elastic band 13 and the locking plate 14 approach the locking assembly 4. When the locking plate 14 moves to the same horizontal position as the positioning box 41, the user needs to push the entire locking plate 14. When the locking block 15 on the locking plate 14 enters the inside of the positioning box 41, the outer wall of the locking block 15 will abut against the inclined surface of the clamping plate 42, and at this time, the clamping plate 42 will be controlled to rise. When the clamping plate 42 rises, the limit spring 44 rises and stretches. When the locking block 15 completely enters the inside of the positioning box 41, the clamping plate 42 will smoothly descend to lock the locking block 15, and at this time, the limit spring 44 will return to its initial state.

[0083] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A lifting hook with a dual protection function, characterized in that, It includes a handgrip, a winder, a flipping component and a protection component; A lifting belt is installed inside the winder; A hook is fixedly connected to the outside of the handgrip. The flipping component is installed outside the hook. The flipping component includes a first gear rotatably connected to the outer wall of the hook. A flap is fixedly connected to the outer wall of the first gear. A grip is fixedly connected to the outer wall of the flap. An adapter frame is fixedly connected to the outer wall of the handgrip and below the first gear. A return spring is installed inside the adapter frame. An adapter plate is fixedly connected to the outer wall of the grip; The protection component is installed outside the hook and above the flipping component. The protection component includes a second gear rotatably connected to the outer wall of the hook and above the first gear. Positioning frames are fixedly connected to both side walls of the hook. A protection gear ring is meshed and connected above the second gear. An auxiliary wheel is rotatably connected to the inner wall of the protection gear ring. A limiting plate is fixedly connected to the outer wall of the protection gear ring.

2. The lifting hook with a dual protection function according to claim 1, characterized in that, The bottom of the adapter plate extends into the inside of the adapter frame, and the bottom end of the return spring is fixedly connected to the outer wall of the adapter plate.

3. The lifting hook with a dual protection function according to claim 1, characterized in that, The first gear and the second gear are meshed with each other, and the limiting plate is slidably connected to the inner wall of the positioning frame and the two outer walls of the hook.

4. The lifting hook with a dual protection function according to claim 1, characterized in that, It also includes a lubrication component and a locking component. The locking component includes a positioning box fixedly arranged on the outer wall of the hook. The lubrication component includes an oil box fixedly arranged on the outer wall of the positioning box. A limiting groove is formed on the front outer wall of the hook. A rubber bladder is slidably connected inside the limiting groove. A hose is hermetically installed on the outer wall of the oil box. A lubricating pipe is hermetically installed on the outer wall of the rubber bladder. Three snap rings are fixedly arranged on the front outer wall of the hook; A pressing plate is rotatably connected to one end outer wall of the protection gear ring. A knob penetrates through the pressing plate, and the knob is threadedly connected to the protection gear ring.

5. The lifting hook with a dual protection function according to claim 4, characterized in that, The outlet end of the hose is hermetically installed with the rubber bladder. The lubricating pipe passes through the inside of the three snap rings, and the outlet end of the lubricating pipe is aligned with the second gear.

6. The lifting hook with a dual protection function according to claim 4, characterized in that, The shape of the limiting groove is a "T" type structure. The rubber bladder is slidably connected to the limiting groove through a slider adapted to the limiting groove, and a positioning bolt for locking is threadedly connected to the outer wall of the slider.

7. The lifting hook with a dual protection function according to claim 4, wherein, A clamping plate is slidably connected inside the positioning box. A limiting post is fixedly arranged on the top of the clamping plate. A limiting spring is sleeved on the outer wall of the limiting post; The bottom end of the grip is rotatably connected to a rotating plate. A baffle is fixedly arranged on the outer wall of the grip. An elastic band is fixedly arranged at the bottom end of the rotating plate. A locking plate is fixedly arranged at the tail end of the elastic band. A locking block is fixedly arranged on the outer wall of the locking plate.

8. The lifting hook with a dual protection function according to claim 7, characterized in that, The bottom of the baffle extends to the outer wall of the rotating plate. The bottom of the clamping plate is of an inclined surface structure. The upper and lower ends of the limiting spring are fixedly connected to the upper surface of the positioning box and the limiting post.

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