Lifting hook device and lifting system

Abstract

The utility model discloses a lifting hook device and a hoisting system, the lifting hook device comprises a lifting hook frame, a clamping assembly and an adjusting assembly, the clamping assembly is connected with the lifting hook frame and extends towards the direction far away from the lifting hook frame to form a free end, and the free end is used for being inserted into a mounting hole of a battery pack; the adjusting assembly is connected with the free end and used for changing the cross section area of the free end. Compared with the prior art, after the lifting hook device is mounted in the mounting hole of the battery pack, the lifting hook device is difficult to separate from the mounting hole of the battery pack due to the fact that the cross sectional area of the free end is changed by the adjusting assembly, and lifting is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to hoist frock technical field, especially a kind of lifting hook device and hoisting system. BACKGROUND

[0002] With the integration and large-scale of battery module, the hoisting and transportation of battery pack becomes an indispensable link in its production process, and the common hoisting method is to hook the mounting hole on battery pack with lifting hook to realize fixation. In order to ensure the safety of hoisting, the general method currently adopted by the industry is to symmetrically open grooves around the battery pack, and to use multiple lifting hooks to simultaneously carry out hoisting operation. Therefore, multiple operators need to be configured for a single battery pack, which greatly increases the operation cost, and moreover, once the lifting hook on one side slips off, the battery pack has a high risk of falling off. SUMMARY

[0003] One purpose of the utility model is to provide a kind of lifting hook device, which aims to solve the technical problem of existing hoisting technology needing to be lifted from multiple directions, increasing labor cost.

[0004] To achieve the above purpose, the utility model provides a kind of lifting hook device, which comprises a lifting hook frame, a clamping assembly and an adjusting assembly. Specifically, the clamping assembly is connected with the lifting hook frame and extends in a direction away from the lifting hook frame to form a free end, and the free end is used for being inserted into the mounting hole of the battery pack; the adjusting assembly is connected with the free end, and the adjusting assembly is used for changing the cross-sectional area of the free end.

[0005] In some embodiments, the clamping assembly comprises a clamping seat and clamping leaves, the clamping seat is connected with the lifting hook frame, and multiple clamping leaves are arranged on the clamping seat and extend in a direction away from the lifting hook frame to form a free end; the adjusting assembly comprises a clamping block and a traction mechanism, the clamping block is embedded between the multiple clamping leaves, the clamping block abuts against the side surface of each clamping leaf, and the traction mechanism is used for pulling the clamping block close to or away from the clamping seat to make the clamping leaves open or close.

[0006] In some embodiments, a through shaft hole is opened on the lifting hook frame; the traction mechanism comprises a pull shaft, the pull shaft is arranged through the through shaft hole, one end of the pull shaft is connected with the clamping block, and a wrench is rotatably connected with the end of the pull shaft away from the clamping block, the wrench comprises a first face and a second face used for abutting against the lifting hook frame, the distance from the first face to the rotation center of the wrench is L1, the distance from the second face to the rotation center of the wrench is L2, and L1

[0007] In some embodiments, the traction mechanism further comprises a spring, the spring is sleeved on the pull shaft, one end of the spring is connected with the clamping block, and the other end of the spring is connected with the clamping seat.

[0008] In some embodiments, the wrench further comprises a third face, the third face is located between the first face and the second face, the distance from the third face to the rotation center of the wrench is L3, and L3>L2.

[0009] In some embodiments, the wrench comprises a wrench block and a handle, the wrench block is in abutment with the hook frame and rotatably connected with the pulling shaft, and the wrench block is detachably connected with the handle.

[0010] In some embodiments, the traction mechanism further comprises a rotating rod, the wrench and the pulling shaft are connected through the rotating rod; the rotating rod comprises a rod body and end caps, the rod body penetrates the wrench and the pulling shaft respectively, and the end caps are arranged at two ends of the rod body and are riveted with the rod body.

[0011] In some embodiments, the first surface and the second surface are connected by an arc.

[0012] In some embodiments, the side of the clamping leaf away from the clamping block is provided with a rounded corner.

[0013] In some embodiments, the clamping seat and the clamping leaf are integrally formed, and the material of the clamping seat and the material of the clamping leaf are stainless steel.

[0014] In some embodiments, the hook frame is provided with a lifting hole, and the edge of the lifting hole is provided with a flat corner; in the axial direction of the lifting hole, the width of the flat corner is 0.5 mm.

[0015] To achieve the above-mentioned purpose, a scheme of the utility model provides a kind of hoisting system, which comprises hoisting device and the hook device of any one of the above, and the hoisting device is connected with the hook frame.

[0016] The utility model has the advantages that:

[0017] The clamping assembly is connected with the hook frame and extends in the direction away from the hook frame to form a free end, the adjusting assembly is connected with the free end, and the adjusting assembly is used to change the cross-sectional area of the free end. When hoisting the battery pack, the free end is inserted into the mounting hole of the battery pack, the adjusting assembly is controlled to increase the cross-sectional area of the free end, and the free end directly clamps the mounting hole of the battery pack, or the enlarged free end does not abut against the edge of the mounting hole, but the enlarged free end is difficult to be pulled out of the mounting hole, so that the fixing is realized.

[0018] Compared with the prior art, after the hook device of the utility model is installed in the mounting hole of the battery pack, the cross-sectional area of the free end is changed by the adjusting assembly, so that the hook device is difficult to be pulled out of the mounting hole of the battery pack. On the one hand, the installer can insert the hook device one by one without the need for multiple operators to operate at the same time, so that the labor cost is greatly reduced. On the other hand, when part of the hook device loses the hoisting ability accidentally, such as material fracture or improper connection, the remaining hook device will not be separated from the battery pack due to the inclination of the battery pack, so that the safe falling of the battery pack is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0020] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the hook device in the first state according to an embodiment of the present application;

[0021] Figure 2 Fig. 2 is a schematic diagram of the cross section of the hook device in the first state according to an embodiment of the present application;

[0022] Figure 3 Fig. 3 is a schematic diagram of the cross section of the pulling block according to an embodiment of the present application;

[0023] Figure 4 Fig. 4 is a schematic diagram of the overall structure of the hook device in the second state according to an embodiment of the present application;

[0024] Figure 5 Fig. 5 is a schematic diagram of the cross section of the hook device in the second state according to an embodiment of the present application.

[0025] Brief Description of the Drawings:

[0026] 10, hook frame; 11, through shaft hole; 12, hoisting hole; 20, clamping assembly; 21, clamping seat; 22, clamping leaf; 30, adjusting assembly; 31, clamping block; 32, traction mechanism; 321, pull shaft; 322, wrench; 322a, first surface; 322b, second surface; 322c, third surface; 3221, pulling block; 3222, handle; 323, spring; 324, rotating rod; 3241, rod body; 3242, end cap. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] Please refer to Figures 1 to 5 , Figure 1 Fig. 1 is a schematic diagram of the overall structure of the hook device in the first state according to an embodiment of the present application; Figure 2 Fig. 2 is a schematic diagram of the cross section of the hook device in the first state according to an embodiment of the present application;Figure 3 is a cross-sectional view of the pulling block 3221 provided in the embodiments of the present application; Figure 4 is a schematic diagram of the overall structure of the lifting hook device in the second state provided in the embodiments of the present application; Figure 5 is a cross-sectional view of the lifting hook device in the second state provided in the embodiments of the present application.

[0029] The embodiments of the present application provide a lifting hook device, which comprises a lifting hook frame 10, a clamping assembly 20 and an adjusting assembly 30. Specifically, the clamping assembly 20 is connected with the lifting hook frame 10 and extends in a direction away from the lifting hook frame 10 to form a free end, and the free end is used for being inserted into a mounting hole of a battery pack; the adjusting assembly 30 is connected with the free end, and the adjusting assembly 30 is used for changing the cross-sectional area of the free end.

[0030] In the embodiments, the lifting hook frame 10 is used for cooperating with an external lifting device to provide a lifting force; the clamping assembly 20 is inserted into the mounting hole of the battery pack to cooperate with the battery pack; and the adjusting assembly 30 controls the change of the cross-sectional area of the free end. In the process of inserting the lifting hook device into the mounting hole of the battery pack, the adjusting assembly 30 controls the cross-sectional area of the free end to be reduced to facilitate the insertion, and the lifting hook device is in a first state; after the lifting hook device is inserted into a predetermined assembly position, the adjusting assembly 30 controls the cross-sectional area of the free end to be increased, the clamping assembly 20 clamps the mounting hole of the battery pack, and the lifting hook device is in a second state.

[0031] It should be noted that the clamping of the clamping assembly 20 to the mounting hole of the battery pack includes at least two cases, one of which is that the expanded free end directly supports the mounting hole, and the clamping assembly 20 is completely fixed with the battery pack; the other is that the cross-sectional area of the free end is expanded, but the part of the clamping assembly 20 cooperating with the mounting hole still has a certain gap with the mounting hole, and when the lifting hook device has a tendency to fall out of the mounting hole, the expanded free end makes the battery pack unable to fall off from the lifting hook device in the second state.

[0032] In the prior art, because the single lifting hook has a risk of falling out, therefore, when performing the lifting work, an operator needs to be configured corresponding to each lifting hook, for example, four operators are needed to simultaneously insert the lifting hooks from both sides of the battery pack, and while the aforementioned operators support the lifting hooks, another operator controls the lifting machine to lift.

[0033] Compared with the prior art, after the hook device provided in the embodiment is successfully installed, the clamping assembly 20 of each hook device is independently connected with the mounting hole of the battery pack. On the one hand, this optimizes the requirements of the on-site operator, and only one operator is required to sequentially hook the hook assemblies into the corresponding mounting holes to realize hoisting fixation, and even after hoisting fixation, the operator can also take charge of the hoisting operation of the crane, greatly reducing the idle labor cost; on the other hand, even if part of the hook devices are detached from the mounting holes due to various accidents, and the battery pack is overturned as a whole, the hook device provided in the embodiment can independently clamp the mounting hole in the second state, so that the overturned battery pack still remains hoisted and will not fall from the air, and only the mounting hole needs to be repaired afterwards, avoiding the overall damage of the battery pack.

[0034] In some embodiments, the clamping assembly 20 includes a clamping seat 21 connected with the hook frame 10 and a plurality of clamping leaves 22 arranged on the clamping seat 21 and extending away from the hook frame 10 to form free ends; the adjusting assembly 30 includes a clamping block 31 and a traction mechanism 32, the clamping block 31 is embedded between the plurality of clamping leaves 22, the clamping block 31 abuts the side surface of each clamping leaf 22, and the traction mechanism 32 is used to pull the clamping block 31 close to or away from the clamping seat 21, so as to open or close the clamping leaves 22.

[0035] The embodiment provides a specific structure of the clamping assembly 20. When the clamping block 31 is away from the clamping seat 21, the clamping leaves 22 are closed, and the hook device is in the first state; when the clamping block 31 is close to the clamping seat 21, the gap between the clamping leaves 22 is expanded by the clamping block 31, the clamping leaves 22 are opened, and the hook device is in the second state.

[0036] As can be imagined, the structure of the clamping assembly 20 and the adjusting assembly 30 provided in the embodiment is only one of the more optimal structures of the clamping assembly 20 and the adjusting assembly 30, and those skilled in the art can modify it to other feasible structures without creative labor, for example, the free end of the clamping assembly 20 is made of a folding structure or a spring 323 structure made of a memory alloy, which is expanded after being heated or powered on to clamp the mounting hole; for another example, the free end of the clamping assembly 20 is provided with a plurality of clamping teeth along the outer peripheral surface thereof, when the clamping assembly 20 is inserted into the mounting hole, the clamping teeth are expanded to abut the edge of the mounting hole, thereby realizing the fixation of the hook device.

[0037] Further, the hook frame 10 is provided with a shaft hole 11; the traction mechanism 32 comprises a pulling shaft 321, the pulling shaft 321 is arranged in the shaft hole 11, one end of the pulling shaft 321 is connected with the clamping block 31; a wrench 322, the wrench 322 is rotatably connected with the end of the pulling shaft 321 away from the clamping block 31, the wrench 322 comprises a first surface 322a and a second surface 322b for abutting against the hook frame 10, the distance from the first surface 322a to the rotation center of the wrench 322 is L1, the distance from the second surface 322b to the rotation center of the wrench 322 is L2, L1 < L2. The pulling shaft 321 and the clamping block 31 can be two workpieces connected with each other, or can be integrally formed.

[0038] When the first surface 322a of the wrench 322 abuts against the hook frame 10, the clamping block 31 is far away from the clamping seat 21, and the hook device is in the first state; when the second surface 322b of the wrench 322 abuts against the hook frame 10, the clamping block 31 is close to the clamping seat 21, and the hook device is in the second state. Compared with directly pulling the pull rod, the setting of the wrench 322 makes the adjustment of the clamping assembly 20 more labor-saving and more convenient. Of course, directly pulling the pull rod and then fixing it by using the bolt can also realize the adjustment of the relative position of the clamping block 31 and the clamping seat 21, and the embodiment provided herein is only one feasible implementation manner of the traction mechanism 32.

[0039] Further, the traction mechanism 32 further comprises a spring 323, the spring 323 is sleeved on the pulling shaft 321, one end of the spring 323 is connected with the clamping block 31, and the other end of the spring 323 is connected with the clamping seat 21.

[0040] The setting of the spring 323 makes the clamping block 31 have a tendency to move away from the clamping seat 21, when the hook device switches from the second state back to the first state, the clamping block 31 automatically moves away from the clamping seat 21, so as to facilitate the folding of the clamping leaves 22.

[0041] It should be noted that whether the clamping leaves 22 have the automatic folding feature does not affect the switching of the hook device from the second state back to the first state. In the structure shown in the figure, even if the clamping leaves 22 still maintain the open state after the clamping block 31 moves away from the clamping seat 21, the clamping leaves 22 will be folded under the action of the mounting hole when the clamping assembly 20 is pulled out of the mounting hole of the battery pack, and the disassembly of the hook device will not be affected.

[0042] Optionally, the wrench 322 further comprises a third surface 322c, the third surface 322c is located between the first surface 322a and the second surface 322b, the distance from the third surface 322c to the rotation center of the wrench 322 is L3, L3 > L2. The form of the third surface 322c is not limited, when the distance from the third surface 322c to the rotation center of the wrench 322 is not a fixed value, only the maximum value of the plurality of L3 needs to satisfy L3 > L2.

[0043] The third face 322c is arranged so that when the hook device is in the second state, it does not have the power to spontaneously change to the first state. Whether switching from the first state to the second state or from the second state to the first state, the rotation of the wrench 322 needs to pass through the third face 322c, which is an intermediate part with relatively large resistance, which ensures the structural stability of the hook state during use.

[0044] Optionally, the wrench 322 includes a wrench block 3221 and a handle 3222, the wrench block 3221 is in abutment with the hook frame 10 and is rotatably connected with the pull shaft 321, and the wrench block 3221 is detachably connected with the handle 3222. The handle 3222 and the wrench block 3221 are optionally connected by threads, insertion, clamping, etc.

[0045] During the adjustment of the hook device, based on the principle of leverage, the design of the handle 3222 can make the state switching of the hook device easier; after the hook device is assembled with the battery pack, detaching the handle 3222 from the plate can reduce the size of the whole hoisting, and avoid accidents caused by the collision of the handle 3222 with the environment.

[0046] Optionally, the traction mechanism 32 further includes a rotating rod 324, the wrench 322 and the pull shaft 321 are connected through the rotating rod 324; the rotating rod 324 includes a rod body 3241 and an end cap, the rod body 3241 passes through the wrench 322 and the pull shaft 321 respectively, and the end cap is arranged at both ends of the rod body 3241, and the end cap is riveted with the rod body 3241.

[0047] For the wrench 322 that needs to be adjusted multiple times, the stability of the part that bears the rotating function determines the service life of the wrench 322, and the riveted rotating rod 324 has more stable advantages than the threaded connection and other methods, avoiding loosening caused by reciprocating rotation, and further avoiding the personal safety risk caused by the flying of the rotating rod 324 under load.

[0048] Optionally, the first face 322a and the second face 322b are connected by an arc.

[0049] The arc connection of the first face 322a and the second face 322b reduces the resistance in the rotation process of the wrench 322, which facilitates the operator to switch the state of the hook device.

[0050] In some embodiments, the clamping assembly 20 comprises a clamping base 21 connected with the hook frame 10 and a plurality of clamping leaves 22 arranged on the clamping base 21 and extending away from the hook frame 10 to form free ends; the adjusting assembly 30 comprises a clamping block 31 and a traction mechanism 32, the clamping block 31 is embedded between the plurality of clamping leaves 22, the clamping block 31 abuts against the side surface of each clamping leaf 22, and the traction mechanism 32 is used to pull the clamping block 31 close to or away from the clamping base 21 so as to open or close the clamping leaves 22. In particular, the side of the clamping leaf 22 away from the clamping block 31 is provided with a rounded corner.

[0051] In the radial direction of the clamping block 31, the thicker the thickness of the clamping leaf 22 is, the greater the strain of the clamping leaf 22 when it is bent by the same angle is, that is, the greater the risk of tearing on the side of the clamping leaf 22 close to the clamping block 31 is. The rounded corner provided on the side of the clamping leaf 22 away from the clamping block 31 can obviously reduce the risk of tearing of the clamping leaf 22 and prolong the service life of the clamping assembly 20.

[0052] Optionally, the clamping base 21 and the clamping leaf 22 are integrally formed, and the material of the clamping base 21 and the material of the clamping leaf 22 are stainless steel.

[0053] The elasticity of the stainless steel material makes the clamping leaf 22 automatically close and remain in the closed state when the clamping block 31 is away from the clamping base 21, which makes it still easy to insert into the mounting hole when the hook device is used again, facilitating the assembly work.

[0054] Of course, the clamping base 21 and the clamping leaf 22 themselves have elasticity, which is only one of the feasible schemes for the reset of the clamping assembly 20. The automatic reset of the clamping leaf 22 can also be achieved by sleeving an elastic reset member on the clamping leaf 22 or connecting the clamping base 21 and the clamping leaf 22 through an elastic member. Moreover, even if the clamping leaf 22 cannot achieve automatic reset, it does not mean that the hook device proposed in the present application is a disposable tool. The operator can achieve multiple assembly of the hook device by using auxiliary tools or directly holding and pinching the clamping leaf 22.

[0055] In some embodiments, the hook frame 10 is provided with a lifting hole 12, and the edge of the lifting hole 12 is provided with a flat corner. In the axial direction of the lifting hole 12, the width of the flat corner is 0.5mm.

[0056] The chamfered lifting hole 12 can reduce stress concentration during lifting and avoid cracking of the edge of the lifting hole 12. The specific chamfer shape and width can also be adjusted according to the matching structure of the lifting device.

[0057] The utility model also provides a hoisting system, the hoisting system includes a lifting device and the hook device of any one of the above, the lifting device is connected with the hook frame 10.

[0058] Because the hoisting system includes the hook device, the embodiment has the advantages of the hook device. Specifically, when the hoisting system performs the hoisting operation, only one operator is needed to insert each hook device into the mounting hole of the battery pack one by one and fix, and then start the lifting device to realize the hoisting operation of the battery pack, which greatly reduces the labor cost of the operation; and when part of the hook devices fall off due to unexpected circumstances, the remaining hook devices can independently block the mounting hole, ensuring that the battery pack will not fall accidentally. It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.

[0059] It should also be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or can have a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can be indirectly connected to the other element through a middle element.

[0060] In addition, the descriptions involving "first", "second" and the like in the utility model are only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the utility model.

[0061] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A hook device, characterized in that The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; 2. The hanger device of claim 1, wherein, The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; 3. The hanger device of claim 2, wherein, The hook frame is provided with a through-hole; 4. The hanger apparatus of claim 2, wherein, The hook frame is provided with a through-hole; 5. The hanger apparatus of claim 2, wherein, The hook frame is provided with a through-hole; 6. The hanger apparatus of claim 2, wherein, The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; 7. The hanger apparatus of claim 2, wherein, The hook frame is provided with a through-hole; 8. The hook device according to any one of claims 1 to 7, characterized in that The hook frame is provided with a through-hole; 9. The hook device according to any one of claims 1 to 7, characterized in that The hook frame is provided with a through-hole; 10. The hook device according to any one of claims 1 to 7, characterized in that The hook frame is provided with a through-hole; 11. A hoisting system characterized by, The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; The hook frame is provided with a through-hole; 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