CN219860071U - Auxiliary hook head fixing mechanism - Google Patents

Abstract

The utility model discloses a secondary hook head fixing mechanism, which belongs to the technical field of crane equipment and comprises a secondary hook connector, a fixing sleeve and a hook body, wherein the upper end of the hook body is arranged on the secondary hook connector through the fixing sleeve; the fixing sleeve is provided with a connecting hole penetrating through the fixing sleeve from top to bottom, a first clamping piece is formed on the inner wall surface of the connecting hole, and a second clamping piece matched with the first clamping piece is arranged on the outer wall surface of the upper end part of the lifting hook body; the fixed cover includes first installed part and second installed part, first installed part with all contain on the second installed part at least the part of connecting hole, just first installed part with second installed part lateral wall amalgamation forms the connecting hole, in the fixed cover of lifting hook body ability fixed mounting, it is not rotatory for the gib head direction of lifting hook body remains unanimous throughout, and whole bearing capacity is strong, need not regularly to change fixed part (i.e. bolt), and whole practicality is strong.

Description

Auxiliary hook head fixing mechanism

Technical Field

The utility model relates to the technical field of crane equipment, in particular to a secondary hook head fixing mechanism.

Background

In the current production process in front of the steelmaking furnace, when the crown block lifts up the ladle and pours molten steel into the furnace, the ladle hung by the main hook needs to be lifted to the furnace mouth of the converter, then the auxiliary hook is hooked on the tilting shaft, and after the hook is hooked, the auxiliary hook is lifted up, and the molten iron is poured into the converter for converting. In the process, in order to ensure safety, the auxiliary hook cannot be hooked in advance (preventing the occurrence of the phenomenon of the turning over caused by abnormality), and the auxiliary hook must be hooked after the main hook lifts the ladle to the converter mouth. When the auxiliary hook is hung, the auxiliary hook is operated by a crane worker, lifted to the corresponding height, walked below the tilting shaft, and then lifted to pour molten iron into the converter mouth.

There are several disadvantages in this process: when the auxiliary hook is hooked, an underground operator sometimes needs to use a tool to guide the auxiliary hook to be hooked on the tilting shaft, so that the danger of the operator is increased; the requirements on the astronauts are high, and the labor intensity of the astronauts is increased; and the smelting time is wasted, and the yield is not improved.

The utility model patent with the publication number of CN218231528U discloses a fixing device for crown block hook heads, wherein two crown block hook head guard plates are arranged at the installation positions of crown block hook heads and crown block rope winding, the upper ends of the crown block hook heads are provided with fixing plates, the fixing plates and the crown block hook heads are fixedly connected through bolts, the crown block hook heads are fixed, the crown block hook heads are prevented from rotating, bolt holes of the crown block hook heads are required to be manually searched and aligned with the bolt holes of the fixing plates, bolts can be sequentially connected with the bolt holes of the crown block hook heads and the bolt holes of the fixing plates, the installation is troublesome, the bearing capacity of the bolts is omitted, the bolts are easy to deform in long-term operation of the crown block hook heads, the bolts need to be regularly maintained and replaced, the crown block hook heads are fixed only by the bolts, the whole bearing capacity is poor, and the practicability after the fixing is not strong.

In view of this, the present inventors have conducted intensive studies in response to this need, and have made the present utility model.

Disclosure of Invention

In order to overcome the technical problems that in the prior art, the installation of a crown block hook head is complex, the overall bearing capacity is poor, the practicability after the crown block hook head is fixed is not strong, fixing parts (namely bolts) are required to be maintained and replaced regularly, and the workload of workers is increased, the utility model discloses an auxiliary hook head fixing mechanism which comprises an auxiliary hook connector, a fixing sleeve and a lifting hook body, wherein the upper end of the lifting hook body is arranged on the auxiliary hook connector through the fixing sleeve;

the fixing sleeve is provided with a connecting hole penetrating through the fixing sleeve from top to bottom, a first clamping piece is formed on the inner wall surface of the connecting hole, and a second clamping piece matched with the first clamping piece is arranged on the outer wall surface of the upper end part of the lifting hook body;

the fixed sleeve comprises a first mounting piece and a second mounting piece, wherein the first mounting piece and the second mounting piece at least comprise a part of the connecting hole, and the side walls of the first mounting piece and the second mounting piece are spliced to form the connecting hole.

Further, the first mounting piece and the second mounting piece are semi-cylindrical sleeves, and at least one first buckling piece is arranged at the position of the connecting hole part on the first mounting piece and/or the second mounting piece.

Further, a zigzag or concave-convex interface is arranged at the joint of the first mounting piece and the second mounting piece, and the joint of the first mounting piece and the second mounting piece is fixedly connected through welding to form the fixing sleeve.

Further, the first mounting piece comprises an annular support part and an arc-shaped connecting plate arranged on the upper surface of the annular support part, the connecting hole penetrates through the annular support part up and down, and the side wall of the arc-shaped connecting plate, which is close to the connecting hole, is a part of the connecting hole;

the second mounting piece is an arc-shaped plate, the second mounting piece and the side wall of the arc-shaped connecting plate are spliced to form a connecting hole above the annular support portion, and the position of the connecting hole on the second mounting piece is provided with a first clamping piece.

Further, the arc angle of the arc-shaped connecting plate is larger than or equal to 8 degrees, and the second mounting piece is an arc-shaped connecting plate matched with the arc-shaped connecting plate.

Further, the joint of the arc-shaped connecting plate and the second mounting piece, and the upper surface of the second mounting piece and the upper surface of the annular support part are fixedly connected through welding.

Further, an internal thread is formed in the connecting hole, and an external thread matched with the internal thread is formed on the outer wall surface of the upper end part of the lifting hook body;

the first clamping piece is a protruding block and is positioned on the second mounting piece, and the second clamping piece is a groove matched with the first clamping piece at the corresponding position.

Further, two sides of the outer side wall of the fixed sleeve are fixedly arranged on the auxiliary hook connector through vertical plates; one side of each vertical plate covers the spliced parts of the side walls at two sides of the first mounting piece and the second mounting piece, and the other side of each vertical plate is fixed on the auxiliary hook connector.

Further, two vertical side plates which are arranged in parallel are arranged on the auxiliary hook connector, the two vertical plates are fixedly arranged on the side plates, and the direction of the hook head of the hook body is parallel to the plane where the side plates are located.

Further, the first fastening piece is a groove or a bump, and the second fastening piece is a groove or a bump matched with the first fastening piece at a corresponding position.

The beneficial effects are that:

the technical scheme of the utility model has the following beneficial effects:

(1) Through the structural style that changes the fixed cover, wherein, the fixed cover is that there is first installed part and second installed part to constitute, the connecting hole is by the lateral wall amalgamation of first installed part and second installed part forms, during the installation, at first place the upper end of lifting hook body in the connecting hole of first installed part (being worth noting, the connecting hole that says here is the part of connecting hole in the first installed part), because be formed with first buckle spare on the connecting hole inner wall, and be provided with the second buckle spare on the lifting hook body upper end outer wall, during the installation, second buckle spare adaptation matches and installs in first buckle spare (the lifting hook body of this time has been fixed a position, can not rotate), then, the connecting hole (being worth noting, the connecting hole that says here is in the second installed part connecting hole) is to the lifting hook body upper end of being faced in the adaptability, and the connecting hole's of second installed part amalgamation becomes complete fixed cover, the lifting hook body can fix in the fixed cover, the lifting hook body can not rotate (namely the gib head direction of lifting hook body keeps unanimous, the hook head direction of lifting hook body keeps the same, install the hook body that need not be realized in the first buckle spare, the mutual-aid hook body that need to be fixed with the first buckle spare, the mutual deformation of the hook body has been avoided, the mutual safety of the first buckle spare is avoided, the mutual-aid can be realized, the fixed plate is difficult to install, the mutual-phase-change is avoided, the fixed plate is difficult to be fixed with the fixed, the fixed plate has just need to install, and has been difficult mutual-phase-change, and has been avoided the mutual-change, and has been required to be fixed, and has been required to be installed.

(2) The whole bearing capacity is strong, the practicability after fixing is enhanced, and the maintenance time and the cost are saved.

(3) In the first embodiment, the zigzag or concave-convex interface is arranged at the joint of the first mounting piece and the second mounting piece, so that dislocation is avoided when the first mounting piece and the second mounting piece are welded with each other, the stability of the whole structure is influenced, and the installation is convenient.

(4) In the second embodiment, the upper end of the hook body is connected in the connecting hole through threads, so that the overall bearing capacity is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a first perspective view of the secondary hook head securing mechanism of the present utility model;

FIG. 2 is a second perspective view of the fixing sleeve of the secondary hook head fixing mechanism of the present utility model;

FIG. 3 is an exploded view of the retaining sleeve (embodiment one) of the secondary hook head retaining mechanism of the present utility model;

FIG. 4 is an exploded view of a retaining sleeve (second embodiment) of the secondary hook head retaining mechanism of the present utility model;

fig. 5 is a perspective view of the hook body of the secondary hook head fixing mechanism of the present utility model.

In the figure: 1. an auxiliary hook connector; 2. a fixed sleeve; 3. a hook body; 201. a connection hole; 202. a first clamping piece; 203. a second clamping piece; 21. a first mounting member; 22. a second mounting member; 211. an annular support portion; 212. an arc-shaped connecting plate; 23. a vertical plate; 11. and a side plate.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

This embodiment is through changing the structural style of fixed cover, wherein, the fixed cover is that there is first installed part and second installed part to constitute, the connecting hole is by the lateral wall amalgamation of first installed part and second installed part forms, during the installation, at first place the upper end of lifting hook body in the connecting hole of first installed part (being worth noting, the connecting hole that says here is the part of connecting hole in the first installed part), because be formed with first buckle spare on the connecting hole internal face, and be provided with the second buckle spare on the lifting hook body upper end outer wall, during the installation, second buckle spare adaptation matching installs in first buckle spare (the lifting hook body when this time can not be fixed a position, can not rotate), then, the connecting hole (being worth noting, the connecting hole that says here in the second installed part is connecting hole) is to the connecting hole adaptively opposite to lifting hook body upper end, and with the connecting hole in first installed part, the second installed part amalgamation becomes complete fixed cover, the lifting hook body can be fixed in the fixed cover, the lifting hook body can not rotate (namely the lifting hook body keeps the first buckle spare to keep the first buckle spare, the first buckle spare can not be realized with the first buckle spare, the mutual difficult and the mutual deformation of the product is just can be avoided to the first buckle spare, the mutual difficult to install, the fixed plate is realized with the first buckle spare is avoided, the mutual difficult installation has been avoided, the mutual difficult and the fixed mounting is realized, the first buckle spare is difficult to install, the mutual difficult and the product is just fixed to be realized, the first buckle spare has the difficult to install, and the mutual difficult and has been avoided the installation has the mutual installation has the installation to install.

Referring to fig. 1 to 5, an auxiliary hook head fixing mechanism includes an auxiliary hook connector 1, a fixing sleeve 2 and a hook body 3, wherein the upper end of the hook body 3 is mounted on the auxiliary hook connector 1 through the fixing sleeve 2;

a connecting hole 201 penetrating up and down is formed in the fixing sleeve 2, a first fastening piece 202 is formed on the inner wall surface of the connecting hole 201, and a second fastening piece 203 matched with the first fastening piece 202 is arranged on the outer wall surface of the upper end part of the lifting hook body 3;

the fixing sleeve 2 comprises a first mounting piece 21 and a second mounting piece 22, wherein the first mounting piece 21 and the second mounting piece 22 at least comprise a part of the connecting hole 201, and the side walls of the first mounting piece 21 and the second mounting piece 22 are spliced to form the connecting hole 201.

In the technical scheme, the fixing sleeve 2 is formed by splicing the side walls of the first mounting piece 21 and the second mounting piece 22, the connecting hole 201 is formed by splicing the side walls of the first mounting piece 21 and the second mounting piece 22, as shown in fig. 2, when the hook body 3 is mounted, because the first clamping piece 202 is formed on the inner wall surface of the connecting hole 201, and the second clamping piece 203 matched with the first clamping piece 202 is arranged on the outer wall surface of the upper end part of the hook body 3 (worth noting that the first clamping piece 202 can be arranged on the inner wall surface of the first mounting piece 21 and can also be arranged on the inner wall surface of the second mounting piece 22, the number of the second clamping pieces 203 is not limited correspondingly), the hook body 3 is firstly mounted on the first mounting piece 21, the second clamping piece 203 is in matched and clamped with the first clamping piece 202, and then the second mounting piece 22 is mounted, when the hook body 3 is fixed in the connecting hole 201 of the fixing sleeve 2, the hook body 3 is convenient to be fixedly mounted, the hook body 3 can be fixed in the direction, the hook body can be fixed by the first clamping piece 202 and the first clamping piece 2 can be fixed by adopting the bolt 2, and the fixing bolt 2 can be prevented from being deformed by adopting the fixing bolt 2; because the upper end of the lifting hook body 3 is fixed in the fixed sleeve 2, when the iron-hanging bag is hung, a worker is not required to go to the auxiliary hook, so that the potential safety hazard of the worker can be eliminated, and good product experience is given to the user.

There are two specific embodiments of the retaining sleeve 2 as follows:

example 1

As shown in fig. 3, the first mounting member 21 and the second mounting member 22 are semi-cylindrical sleeves, and at least one first fastening member 202 is disposed at a portion of the first mounting member 21 and/or the second mounting member 22 where the connection hole 201 is located. In this embodiment, the first fastening member 202 may be disposed on an inner wall surface of the first mounting member 21; may be provided on the inner wall surface of the second mounting member 22; the number of the first mounting members and/or the second mounting members 22 is not limited, and correspondingly, the number of the second fastening members 203 is not limited, so that the hook body 3 can be stably fixed; taking the first fastening member 202 disposed on the inner wall surface of the first mounting member 21 as an example, preferably, the first fastening member 202 is a groove or a protrusion, and the second fastening member 203 is matched with the first fastening member 202 at a corresponding position, when the hook is mounted, the upper end portion of the hook body 3 is adaptively attached to a part of the connecting hole 201 on the first mounting member 21, the second fastening member 203 at the upper end portion of the hook body 3 is mutually fastened and matched with the first fastening member 202 on the inner wall surface of the first mounting member 21, and then a part of the connecting hole 201 on the second mounting member 22 is covered and attached to the other side of the upper end portion of the hook body 3, so that in order to form a structurally stable fixing sleeve 2, a zigzag or concave-convex interface is disposed at the joint of the first mounting member 21 and the second mounting member 22, and dislocation is avoided when the first mounting member 21 or the second mounting member 22 is spliced on the second mounting member 22 or the first mounting member 21, and the mounting member 21 is simple and convenient to mount; and because lifting hook body 3 itself also has certain weight, through the amalgamation department of welded fastening connection first installed part 21 and second installed part 22 for its stable in structure, the bearing capacity reinforcing of fixed cover 2 has avoided among the prior art through adopting bolt fastening lifting hook body 3 to lead to the bolt to warp, increases cost of maintenance's defect, lifting hook body 3 only need once install can, has practiced thrift the cost of maintenance change.

Example two

As shown in fig. 4, the first mounting member 21 includes an annular supporting portion 211 and an arc-shaped connecting plate 212 provided on an upper surface of the annular supporting portion 211, the connecting hole 201 penetrates the annular supporting portion 211 up and down, and a side wall of the arc-shaped connecting plate 212 near the connecting hole 201 is a part of the connecting hole 201;

the second mounting member 22 is an arc-shaped plate, the second mounting member 22 and the side wall of the arc-shaped connecting plate 212 are spliced to form the connecting hole 201 above the annular supporting seat 211, and the first fastening member 202 is formed at the position of the connecting hole 201 on the second mounting member 22.

In this embodiment, the first mounting member 21 is an L-shaped structural member composed of an annular supporting portion 211 and an arc-shaped connecting plate 212, the annular supporting portion 211 is provided with a connecting hole 201 penetrating up and down, a side wall of the arc-shaped connecting plate 212, which is close to the connecting hole 201, is actually a part of the connecting hole 201, the second mounting member 22 is an arc-shaped plate, and can be adaptively mounted on the annular supporting portion 211, and two side walls of the arc-shaped plate are spliced on two side walls of the arc-shaped connecting plate 212 to form a completed fixing sleeve 2; during installation, the upper end part of the lifting hook body 3 adaptively penetrates through the connecting hole 201 of the annular supporting seat part 211 and is in fit with the connecting hole 201 on the arc-shaped connecting plate 212, then the second clamping piece 203 on the lifting hook body 3 is rotated to be exposed out of the arc-shaped connecting plate 212, and then the first clamping piece 202 on the second installation piece 22 is aligned with the second clamping piece 203 on the lifting hook body 3 (worth noting that in the embodiment, the first clamping piece 202 is a protruding block, the second clamping piece 203 is a groove, the upper end part of the lifting hook body 3 extends into the connecting hole 201, the groove is aligned with the protruding block to be embedded, so that the lifting hook body 3 can be fixed in the connecting hole 201, the lifting hook body 3 is fixed in the fixed sleeve 2, the lower end of the second installation piece 22 is adaptively installed on the annular supporting seat part 211, and the two side ends of the second installation piece 22 are adaptively fit and fixed on the arc-shaped connecting plate 212, preferably, the joint of the arc-shaped connecting plate 212 and the second installation piece 22 and the upper surface of the annular supporting seat part 211 are fixedly connected through the fixed connection of the lifting hook body 3, so that the fixed end part 3 can be fixed in the fixed sleeve 2 by welding, and the fixed cost of the lifting hook body 3 can be avoided, and the fixed load bearing cost can be increased; preferably, the arc angle of the arc-shaped connecting plate 212 is greater than or equal to 180 °, and the second mounting member 22 is an arc-shaped connecting plate matched with the arc-shaped connecting plate 212, so that the mounting is simple and convenient, and the mounting time for mounting the hook body 3 is saved.

In order that the second fastening member 203 can be accurately inserted into the first fastening member 202 when the hook body 3 extends into the connecting hole 201, as shown in fig. 4 and 5, an internal thread is formed in the connecting hole 201, and an external thread matching the internal thread is formed on an outer wall surface of an upper end portion of the hook body 3;

the first fastening member 202 is a protrusion and is located on the second mounting member 22, and the second fastening member 203 is a groove matching with the first fastening member 202 at a corresponding position. By adopting the structure, the lifting hook body 3 is firstly connected with the first mounting piece 21 along the connecting hole 201 on the arc-shaped connecting plate 212 in a threaded manner during mounting, meanwhile, because the second clamping piece 203 on the lifting hook body 3 is exposed out of the connecting hole 201 of the outer arc-shaped connecting plate 212, when the second mounting piece 23 is mounted, the first mounting piece 202 is a protruding block, the second clamping piece 203 is a groove, the groove is matched with the protruding block, namely, the two side ends of the second mounting piece 23 can be adapted to the mounting annular supporting part 211, are fixed at the two side ends of the arc-shaped connecting plate 212 through welding, the structure is stable, the integral bearing capacity is improved, the lifting hook body 3 is conveniently positioned and mounted, the second mounting piece 22 is prevented from being mounted on the first mounting piece 21 in a dislocation manner, and good product experience is given to a user.

As a preferred embodiment, as shown in fig. 1, two sides of the outer side wall of the fixing sleeve 2 are fixedly installed on the auxiliary hook connector 1 through a vertical plate 23; two riser 23 one side covers respectively first installed part 21 and second installed part 22 both sides lateral wall amalgamation department, the opposite side is fixed on auxiliary hook connector 1, has strengthened the welding area, stable in structure.

As a preferred implementation manner, as shown in fig. 1, two side plates 11 which are vertical and are arranged in parallel are arranged on the auxiliary hook connector 1, two vertical plates 23 are fixedly arranged on the side plates 11, the hook direction of the hook body 3 is parallel to the plane where the side plates 11 are arranged, the installation is convenient, the welding area is enhanced, the structure is stable, the two vertical plates 23 are respectively and fixedly arranged on the side plates 11, the hook direction of the hook body 3 is parallel to the plane where the side plates 11 are arranged, the hook direction of the hook body 3 is always kept in one direction, the time of a hanging iron ladle is reduced, the hook direction of the hook body 3 is not required to be positioned in an auxiliary manner by workers, and the potential safety hazard of workers is eliminated.

The installation flow comprises the following steps: the upper end of the hook body is first placed in the connecting hole (note that the connecting hole is a part of the connecting hole in the first mounting piece) of the first mounting piece, because the first clamping piece is formed on the inner wall surface of the connecting hole, and the second clamping piece is arranged on the outer wall surface of the upper end of the hook body, when the hook is mounted, the second clamping piece is adaptively matched and mounted in the first clamping piece (the hook body cannot be positioned and cannot rotate at the moment), then the connecting hole (note that the connecting hole is a part of the connecting hole in the second mounting piece) of the second mounting piece is adaptively opposite to the upper end of the hook body, and the first mounting piece and the second mounting piece are spliced into a complete fixing sleeve, so that the hook body can be fixed in the fixing sleeve, and the hook body cannot rotate (i.e. the hook head direction of the hook body keeps consistent).

And finally, respectively welding two ends of the fixed sleeve fixedly provided with the lifting hook body on the two vertical plates, and welding the other sides of the two vertical plates on the side plates to realize the installation of the auxiliary hook.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and various modifications and variations may be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The auxiliary hook head fixing mechanism is characterized by comprising an auxiliary hook connector (1), a fixing sleeve (2) and a hook body (3), wherein the upper end of the hook body (3) is arranged on the auxiliary hook connector (1) through the fixing sleeve (2);

a connecting hole (201) penetrating through the fixing sleeve (2) vertically is formed in the fixing sleeve, a first clamping piece (202) is formed on the inner wall surface of the connecting hole (201), and a second clamping piece (203) matched with the first clamping piece (202) is arranged on the outer wall surface of the upper end part of the lifting hook body (3);

the fixing sleeve (2) comprises a first mounting piece (21) and a second mounting piece (22), wherein the first mounting piece (21) and the second mounting piece (22) at least comprise a part of the connecting hole (201), and the side walls of the first mounting piece (21) and the second mounting piece (22) are spliced to form the connecting hole (201).

2. A secondary hook head fixing mechanism according to claim 1, wherein the first mounting member (21) and the second mounting member (22) are semi-cylindrical sleeves, and at least one first fastening member (202) is provided at a portion of the first mounting member (21) and/or the second mounting member (22) at the position of the connecting hole (201).

3. The secondary hook head fixing mechanism according to claim 2, wherein a zigzag or concave-convex interface is arranged at the joint of the first mounting piece (21) and the second mounting piece (22), and the joint of the first mounting piece (21) and the second mounting piece (22) is fixedly connected through welding to form the fixing sleeve (2).

4. A secondary hook head fixing mechanism according to claim 1, wherein the first mounting member (21) comprises an annular supporting portion (211) and an arc-shaped connecting plate (212) provided on an upper surface of the annular supporting portion (211), the connecting hole (201) penetrates the annular supporting portion (211) up and down, and a side wall of the arc-shaped connecting plate (212) adjacent to the connecting hole (201) is a part of the connecting hole (201);

the second mounting piece (22) is an arc-shaped plate, the second mounting piece (22) and the side wall of the arc-shaped connecting plate (212) are spliced to form a connecting hole (201) above the annular support portion (211), and the position of the connecting hole (201) on the second mounting piece (22) is provided with a first clamping piece (202).

5. The secondary hook head fastening mechanism of claim 4 wherein said arcuate web (212) has an arcuate angle greater than or equal to 180 ° and said second mounting member (22) is an arcuate web that mates with said arcuate web (212).

6. The secondary hook head fixing mechanism according to claim 4, wherein the joint of the arc-shaped connecting plate (212) and the second mounting member (22) is fixedly connected with the upper surface of the annular supporting seat (211) by welding.

7. The secondary hook head fixing mechanism according to claim 4, wherein an internal thread is formed in the connecting hole (201), and an external thread matched with the internal thread is formed on an outer wall surface of the upper end portion of the hook body (3);

the first clamping piece (202) is a protruding block and is positioned on the second mounting piece (22), and the second clamping piece (203) is a groove matched with the first clamping piece (202) at the corresponding position.

8. The auxiliary hook head fixing mechanism according to claim 1, wherein two sides of the outer side wall of the fixing sleeve (2) are fixedly arranged on the auxiliary hook connector (1) through vertical plates (23); one side of each vertical plate (23) is covered at the splicing position of the side walls at two sides of each first mounting piece (21) and each second mounting piece (22), and the other side of each vertical plate is fixed on the auxiliary hook connector (1).

9. The secondary hook head fixing mechanism according to claim 8, wherein two side plates (11) which are vertical and are arranged in parallel are arranged on the secondary hook connector (1), two vertical plates (23) are fixedly installed on the side plates (11), and the hook head direction of the hook body (3) is parallel to the plane where the side plates (11) are located.

10. The secondary hook head fixing mechanism according to claim 1, wherein the first fastening member (202) is a groove or a protrusion, and the second fastening member (203) is a groove or a protrusion matching the first fastening member (202) at a corresponding position.