CN218708577U - Hoisting device - Google Patents

Abstract

The embodiment of the application provides a hoisting device, which comprises a main body and a connecting assembly; the main body comprises a lifting appliance, a clamp and a bolt hole, the clamp and the lifting appliance are of a split structure, and the bolt hole penetrates through the lifting appliance and the clamp; the connecting assembly comprises a bolt and a first clamping plate which is rotatably arranged on the bolt, and a first limiting part is arranged on the side wall of the bolt; when the first clamping plate is positioned at a first position on the bolt, the first clamping plate penetrates through the bolt hole through the bolt along with the bolt, so that the first clamping plate and the first limiting part are respectively positioned at two opposite sides of the bolt hole; when the first clamping plate penetrating through the pin hole rotates to the second position, the first clamping plate and the first limiting part are respectively matched with the pin hole to prevent the pin from being separated from the main body. The hoisting device provided by the embodiment of the application can be used for conveniently disassembling and assembling the lifting appliance and the clamp, and further can meet the use requirements of some special working conditions.

Description

Hoisting device

Technical Field

The application relates to the technical field of engineering machinery, in particular to a hoisting device.

Background

In the related art, the hoisting device with the lifting appliance and the clamp generally connects the lifting appliance and the clamp into a non-detachable integral structure, but the non-detachable lifting appliance and the non-detachable clamp cannot meet the use requirements of some special working conditions.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiments of the present application are expected to provide a hoisting device that can be easily disassembled.

In order to achieve the above object, an embodiment of the present application provides a hoisting device, including:

the lifting appliance comprises a main body, wherein the main body comprises a lifting appliance, a clamp and a bolt hole, the clamp and the lifting appliance are of a split structure, and the bolt hole penetrates through the lifting appliance and the clamp;

the connecting assembly comprises a bolt and a first clamping plate which is rotatably arranged on the bolt, and a first limiting part is arranged on the side wall of the bolt; when the first clamping plate is located at a first position on the bolt, the first clamping plate penetrates through the bolt hole along with the bolt, so that the first clamping plate and the first limiting part are respectively located at two opposite sides of the bolt hole; when the first clamping plate penetrating through the bolt hole rotates to a second position, the first clamping plate and the first limiting part are respectively matched with the bolt hole to prevent the bolt from being separated from the main body.

In one embodiment, the rotation axis of the first clamping plate is horizontally arranged, so that the first clamping plate rotates from the first position to the second position under the action of gravity.

In one embodiment, the first catch plate has a lightening hole on one side of the rotation axis, and when the first catch plate rotates to the second position, the lightening hole is located on the upper side of the rotation axis.

In one embodiment, an installation groove is arranged inside the bolt and is communicated with the outside through an opening;

when the first clamping plate is located at the first position, the first clamping plate is located in the mounting groove, and when the first clamping plate rotates to the second position, a partial area of the first clamping plate extends out of the opening to the outside of the bolt.

In one embodiment, the opposite ends of the bolt hole are respectively provided with an inlet and an outlet, the hoisting device comprises a fool-proof piece arranged on the periphery of the inlet, and the first limiting part is matched with the fool-proof piece in a fool-proof manner.

In one embodiment, the spreader includes two first connection portions having first sub-apertures, the two first connection portions being spaced apart, and the clamp includes a second connection portion having a second sub-aperture, the second connection portion being interposed at a spacing between the two first connection portions, the second sub-aperture being in communication with the two first sub-apertures to collectively define the pin aperture.

In one embodiment, the spreader comprises a vertical arm and a first cross arm, the clamp and the vertical arm being disposed at opposite ends of the first cross arm.

In one embodiment, the spreader further comprises a second cross arm, the second cross arm being disposed at an end of the vertical arm remote from the first cross arm, and the second cross arm and the clamp being on the same side of the vertical arm.

In one embodiment, the clamp includes a clamping assembly and a locking assembly; the clamping assembly comprises two clamping arms capable of rotating relatively and a limiting groove with a first opening, and the aperture of the limiting groove is larger than the width of the first opening; a clamping groove with a second opening is formed in the clamping arm and communicated with the limiting groove; the locking subassembly is including setting up with moving about locking lever on the centre gripping subassembly and with locking member of locking lever threaded connection, the locking lever warp first opening with the second opening gets into the spacing groove with the draw-in groove, the locking member is through following the axial displacement of locking lever makes the at least partial region entering of locking member the spacing groove, the locking member with the spacing groove cooperation will the locking lever locking is in on the centre gripping subassembly.

In one embodiment, the locking member is a sleeve with an internal thread, the sleeve includes a holding portion and a second limiting portion, and when the lock rod is in a locking state locked on the clamping assembly, the second limiting portion is located in the limiting groove.

The embodiment of the application provides a hoisting device, which comprises a main body and a connecting assembly. The main body comprises a lifting appliance, a clamp and a bolt hole, the clamp and the lifting appliance are of a split type structure, and the bolt hole penetrates through the lifting appliance and the clamp. The connecting assembly comprises a bolt and a first clamping plate which is rotatably arranged on the bolt, and a first limiting part is arranged on the side wall of the bolt; when the first clamping plate is positioned at a first position on the bolt, the first clamping plate penetrates through the bolt hole through the bolt along with the bolt, so that the first clamping plate and the first limiting part are respectively positioned at two opposite sides of the bolt hole; when the first clamping plate penetrating through the pin hole rotates to the second position, the first clamping plate and the first limiting part are respectively matched with the pin hole to prevent the pin from being separated from the main body. When needs link together hoist and anchor clamps, rotate first cardboard to the first position earlier, in this position, first cardboard can pass the bolt hole along with the bolt together, and first spacing portion can't pass the bolt hole, rotate to the second position when the first cardboard that passes the bolt hole, first cardboard can't pass the bolt hole again, that is to say, first cardboard and first spacing portion all can't pass the bolt hole, therefore, can make the bolt can't break away from the main part, and then can link together hoist and anchor clamps. When needs are with hoist and anchor clamps separation, only need rotate first cardboard to primary importance, again with first cardboard along with the bolt together follow the bolt hole take out can, easy operation is convenient.

Drawings

Fig. 1 is a schematic view of a hoisting device according to an embodiment of the present application for hoisting a workpiece into a structural member;

FIG. 2 isbase:Sub>A sectional view A-A of FIG. 1 with structural members omitted;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

FIG. 4 is a front view of the connection assembly of FIG. 2 with the first card in a first position;

FIG. 5 is a top view of FIG. 4;

FIG. 6 is a cross-sectional view C-C of FIG. 5;

FIG. 7 is another front view of the connection assembly of FIG. 2 with the first card in a second position;

FIG. 8 is a top view of FIG. 7;

FIG. 9 is a cross-sectional view D-D of FIG. 8;

FIG. 10 is a cross-sectional view of the fixture of FIG. 2 holding a workpiece;

FIG. 11 is a cross-sectional view of the stone tongs illustrated in FIG. 10 with the locking assembly in an unlocked position;

FIG. 12 is a cross-sectional view of the stone tongs illustrated in FIG. 10 with the locking assembly in a locked condition.

Description of the reference numerals

1000 hoisting the device; 100 a main body; 110 lifting appliance; 111 a first connection portion; 112 vertical arms; 113 a first cross arm; 114 a second cross arm; 120, a clamp; 121a second connecting portion; 121a second sub-aperture; 122 a clamping assembly; 1221 clamp arms; 1221a first clamp arm; 1221b a second clamp arm; 12211 a clamping section; 12212 a rotary link section; 12213 a free section; 1222a spacing groove; 1222a first opening; 1223a card slot; 1223a second opening; 1224 a second card; 123 a locking assembly; 1231 a lock rod; 1232 a latch; a 12321 grip portion; 12322 a second limiting portion; 124 rubber pad; 130 bolt holes; 200 connecting components; 210a latch; 210a first position-limiting part; 210b mounting slots; 220a first card board; 220a lightening hole; 300 fool-proof piece; 2000 parts; 3000 structural member.

Detailed Description

The embodiment of the present application provides a hoisting device 1000, as shown in fig. 1, 2, and 4 to 9, the hoisting device 1000 includes a main body 100 and a connecting assembly 200. The body 100 includes a hanger 110, a clamp 120 and a latch hole 130, the clamp 120 and the hanger 110 are a split structure, and the latch hole 130 penetrates the hanger 110 and the clamp 120. That is, the clamp 120 and the hanger 110 are two members separable from each other, and a portion of the latch hole 130 is located on the hanger 110 and another portion is located on the clamp 120. The connecting assembly 200 includes a plug 210 and a first clamping plate 220 rotatably disposed on the plug 210, and a sidewall of the plug 210 has a first position-limiting portion 210a; when the first card 220 is located at the first position on the pin 210, the first card 220 passes through the pin hole 130 along with the pin 210, so that the first card 220 and the first position-limiting part 210a are respectively located at two opposite sides of the pin hole 130; when the first catch plate 220 passing through the latch hole 130 is rotated to the second position, the first catch plate 220 and the first stopper portion 210a are respectively engaged with the latch hole 130 to prevent the latch 210 from being disengaged from the main body 100.

Specifically, the spreader 110 is used to connect with a rope such as a wire rope or to be hooked to another member, such as a hook, during a hoisting process.

The clamp 120 is used to clamp the workpiece 2000.

The connecting assembly 200 is an assembly for connecting the spreader 110 and the clamp 120, and when the spreader 110 and the clamp 120 are required to be connected, the first catch plate 220 is first rotated to a first position, in which the first catch plate 220 can pass through the pin hole 130 together with the pin 210, that is, when the pin 210 is aligned with the pin hole 130, the projection of the first catch plate 220 on a projection plane parallel to the pin hole 130 is located in the projection area of the pin hole 130. At least a partial region of the first position-limiting portion 210a has a size larger than that of the pin hole 130, so that the first position-limiting portion 210a cannot pass through the pin hole 130. When the first clamping plate 220 passing through the pin hole 130 rotates to the second position, a portion of the projection of the first clamping plate 220 on the projection plane parallel to the pin hole 130 is located outside the projection area of the pin hole 130, and the first clamping plate 220 can not pass through the pin hole 130 any more, that is, the first clamping plate 220 and the first limiting portion 210a can not pass through the pin hole 130, so that the pin 210 can not be separated from the main body 100, and the hanger 110 and the clamp 120 can be connected together.

When the hanger 110 and the clamp 120 need to be separated, the first clamping plate 220 only needs to be rotated to the first position, and then the first clamping plate 220 is taken out of the pin hole 130 along with the pin 210, so that the operation is simple and convenient.

The manner of the latch hole 130 penetrating through the hanger 110 and the clamp 120 is not limited, and for example, as shown in fig. 2, the hanger 110 includes two first connection parts 111 having first sub-holes (not shown), the two first connection parts 111 are spaced apart, the clamp 120 includes a second connection part 121 having second sub-holes 121a, the second connection part 121 is inserted into the space between the two first connection parts 111, and the second sub-holes 121a communicate with the two first sub-holes to define the latch hole 130 together.

In some embodiments, only one first connection portion 111 may be provided, and one first sub-hole may communicate with one second sub-hole 121a to collectively define the pin hole 130, or two second connection portions 121 having the second sub-holes 121a may be provided on the jig 120, and the two second connection portions 121 are spaced apart, and one first connection portion 111 is inserted into the space between the two first connection portions 111, and the first sub-hole communicates with the two second sub-holes 121a to collectively define the pin hole 130.

In some embodiments, the number of the first connection portion 111 having the first sub-hole and the second connection portion 121 having the second sub-hole 121a may be plural as long as the first sub-hole and the second sub-hole 121a can define the latch hole 130 together.

In one embodiment, as shown in fig. 2, 4 to 9, the rotation axis of the first card 220 is horizontally arranged, so that the first card 220 rotates from the first position to the second position under the action of gravity.

The horizontal arrangement means that when the hoisting device 1000 is in a hoisting state, the rotation axis of the first clamping plate 220 is substantially parallel to the horizontal plane.

The first catch plate 220 rotates from the first position to the second position under the action of gravity, so that the trouble of manually rotating the first catch plate 220 from the first position to the second position can be eliminated, and therefore, the convenience of operation can be further improved.

For example, as shown in fig. 6, 7 and 9, the first catch plate 220 may be provided with a lightening hole 220a at one side of the rotation axis, and the lightening hole 220a may be located at an upper side of the rotation axis when the first catch plate 220 is rotated to the second position. That is, the side of the first card plate 220 opposite to the lightening hole 220a is heavier, and when the first card plate 220 passes through the pin hole 130 along with the pin 210, the side of the first card plate 220 opposite to the lightening hole 220a can automatically rotate to the lower side of the rotation axis, thereby enabling the first card plate 220 to automatically rotate from the first position to the second position under the action of gravity.

It will be appreciated that the manner in which the first catch plate 220 rotates under gravity from the first position to the second position is not limited to the provision of the weight-reducing holes 220a, and for example, in some embodiments, the length of the first catch plate 220 on one side of the axis of rotation may be shorter than the length of the first catch plate 220 on the other side of the axis of rotation, the thickness of the first catch plate 220 on one side of the axis of rotation may be smaller than the thickness of the first catch plate 220 on the other side of the axis of rotation, a weight member may be added to the first catch plate 220 on one side of the axis of rotation, and so on.

In one embodiment, as shown in fig. 4 to 9, a mounting groove 210b is formed inside the latch 210, and the mounting groove 210b is communicated with the outside through an opening. When the first card 220 is in the first position, the first card 220 is located in the mounting groove 210b, and when the first card 220 is rotated to the second position, a partial region of the first card 220 extends out of the opening to the outside of the plug 210.

That is, the portion where the first card board 220 and the plug 210 are rotatably connected is hidden inside the plug 210, so that the appearance of the plug 210 is relatively beautiful, and the portion where the first card board 220 and the plug 210 are rotatably connected can be protected. When the first clamping plate 220 rotates to the second position, a partial region of the first clamping plate 220 extends out of the opening to the outside of the plug 210, so that when the lifting appliance 110 and the clamp 120 need to be separated, the first clamping plate 220 is rotated to the first position by pushing the portion of the first clamping plate 220 extending out of the opening, and therefore, the lifting appliance 110 and the clamp 120 can be conveniently detached.

In an embodiment, as shown in fig. 1 and fig. 3, for convenience of description, opposite ends of the pin hole 130 may be respectively referred to as an inlet and an outlet, the inlet is an end of the pin hole 130 into which the pin 210 is inserted, the outlet is an end of the pin hole 130 through which the pin 210 penetrates, the hoisting device 1000 may be provided with a fool-proof member 300 on a peripheral side of the inlet, the first position-limiting portion 210a is in fool-proof fit with the fool-proof member 300, that is, the first position-limiting portion 210a is matched with the fool-proof member 300 in shape, so that the pin 210 penetrating through the pin hole 130 cannot rotate in the pin hole 130, and thus, the quick assembly and disassembly of the spreader 110 and the clamp 120 may be prevented from being affected by an installation error of the pin 210.

In one embodiment, as shown in fig. 1, the spreader 110 includes a vertical arm 112 and a first cross arm 113, and the clamps 120 and the vertical arm 112 are respectively disposed at opposite ends of the first cross arm 113.

Taking fig. 1 as an example, when it is necessary to hoist a workpiece 2000 into the structure 3000 from a horizontal communication port of a certain structural member 3000, for example, into the cylindrical structural member 3000 shown in fig. 1, the first crossbar 113 may be extended into the structural member 3000 from the horizontal communication port of the structural member 3000, so that the clamp 120 may be fed into the structural member 3000 together with the workpiece 2000, and after the workpiece 2000 is hoisted to a predetermined position in the structural member 3000, the hanger 110 may be separated from the clamp 120, and then the first crossbar 113 may be withdrawn from the structural member 3000, the clamp 120 may be released from the workpiece 2000, and the clamp 120 may be taken out from the structural member 3000, whereby one hoisting operation may be completed, and after the clamp 120 is subsequently connected to the hanger 110, the next hoisting operation may be continued, that is, the hanger 110 having the vertical arms 112 and the first crossbar 113 may be provided to meet the hoisting requirements of the special conditions.

Further, as shown in fig. 1, the lifting tool 110 may further be provided with a second cross arm 114, the second cross arm 114 is provided at an end of the vertical arm 112 far from the first cross arm 113, and the second cross arm 114 and the clamp 120 are located at the same side of the vertical arm 112, thereby ensuring that the clamp 120 can be kept substantially balanced during hoisting.

In one embodiment, as shown in fig. 10-12, the clamp 120 includes a clamping assembly 122 and a locking assembly 123. The clamping assembly 122 includes two clamping arms 1221 capable of rotating relatively and a spacing groove 1222 having a first opening 1222a, wherein the aperture of the spacing groove 1222 is larger than the width of the first opening 1222 a. The clamping arm 1221 is provided with a clamping groove 1223 having a second opening 1223a, and the clamping groove 1223 is communicated with the limiting groove 1222. The locking assembly 123 includes a locking rod 1231 movably disposed on the clamping assembly 122 and a locking member 1232 in threaded connection with the locking rod 1231, the locking rod 1231 enters the limiting groove 1222 and the locking groove 1223 through the first opening 1222a and the second opening 1223a, the locking member 1232 moves along the axial direction of the locking rod 1231, so that at least a partial region of the locking member 1232 enters the limiting groove 1222, and the locking member 1232 cooperates with the limiting groove 1222 to lock the locking rod 1231 on the clamping assembly 122.

As shown in fig. 10, two clamping arms 1221 are used to clamp a workpiece 2000, the workpiece 2000 including, but not limited to, a cylindrical workpiece 2000.

The lock rod 1231 is movably disposed on the clamping assembly 122, which means that the lock rod 1231 can move relative to the clamping assembly 122, and the lock rod 1231 can enter the position-limiting groove 1222 and the card slot 1223 through the first opening 1222a and the second opening 1223a and can move out of the position-limiting groove 1222 and the card slot 1223 through the first opening 1222a and the second opening 1223 a.

The locking member 1232 cooperates with the position-limiting groove 1222 to lock the lock rod 1231 on the clamping assembly 122, which means that the external dimension of at least a partial region of the locking member 1232 is smaller than the external dimension of the position-limiting groove 1222 and larger than the width dimension of the first opening 1222a, after at least a partial region of the locking member 1232 enters the position-limiting groove 1222, the region of the locking member 1232 located in the position-limiting groove 1222 does not come out from the first opening 1222a, thereby the lock rod 1231 can not move to the outside of the position-limiting groove 1222 and the card slot 1223 through the first opening 1222a and the second opening 1223 a.

Specifically, after the two clamping arms 1221 clamp the workpiece 2000 by relative rotation, an operator can move the lock rod 1231 to enable the lock rod 1231 to enter the limiting groove 1222 and the clamping groove 1223 through the first opening 1222a and the second opening 1223a, and then rotate the locking member 1232 to enable the locking member 1232 to move along the axial direction of the lock rod 1231, after at least a partial region of the locking member 1232 enters the limiting groove 1222, the lock rod 1231 is locked on the clamping assembly 122, and the two clamping arms 1221 are locked by the locking rod 1231 and cannot be opened, so that the workpiece 2000 can be better prevented from ejecting the clamping arms 1221 and falling.

When the workpiece 2000 needs to be taken out from between the two clamping arms 1221, the locking member 1232 is rotated to move the region of the locking member 1232 in the limiting groove 1222 to the outside of the limiting groove 1222, and then the locking rod 1231 is moved to the outside of the limiting groove 1222 and the clamping groove 1223 through the first opening 1222a and the second opening 1223a, so that the two clamping arms 1221 can be opened, and the workpiece 2000 can be taken out from between the clamping arms 1221, and the operation is simple and convenient.

In one embodiment, as shown in fig. 10-12, the clamping arm 1221 includes a rotational connection end and a free end, and the clamping slot 1223 can be disposed at the free end.

The rotation connecting end is the connecting end that relative rotation was realized to arm lock 1221, and the free end is arm lock 1221 and the relative one end of rotation connecting end, and two arm lock 1221 can make two arm lock 1221's free end be close to or keep away from through relative rotation.

When the clamping arm 1221 is in the clamping state of clamping the workpiece 2000, the distance between the free ends of the two clamping arms 1221 is relatively short, and therefore, the clamping groove 1223 is provided with the free ends of the clamping arms 1221, so that the length of the locking rod 1231 can be shortened, and the locking rod 1231 can lock the two clamping arms 1221 conveniently.

In a specific embodiment, as shown in fig. 10 to 12, each of the clamping arms 1221 includes a clamping section 12211, a rotation connecting section 12212, and a free section 12213, the clamping sections 12211 of the two clamping arms 1221 define a clamping space therebetween, the rotation connecting section 12212 and the free section 12213 are respectively disposed at opposite ends of the clamping section 12211, the free section 12213 is folded toward an outside of the clamping space, and the clamping groove 1223 is disposed on the free section 12213.

Further, as shown in fig. 10 to 12, the grip sections 12211 of the two grip arms 1221 are respectively bent in opposite directions to define a circular grip space, whereby it is possible to facilitate gripping of the cylindrical workpiece 2000.

In one embodiment, as shown in fig. 10 to 12, the lock rod 1231 is rotatably disposed on the clamping assembly 122, that is, the lock rod 1231 can be rotated relative to the clamping assembly 122 to enter the retaining groove 1222 and the locking groove 1223 through the first opening 1222a and the second opening 1223a or to be removed from the retaining groove 1222 and the locking groove 1223.

As shown in fig. 10 to 12, for convenience of description, two clip arms 1221 may be referred to as a first clip arm 1221a and a second clip arm 1221b, respectively, and illustratively, a lock lever 1231 may be rotatably connected to the first clip arm 1221 a.

In one embodiment, as shown in fig. 10 to 12, the limiting slot 1222 may be disposed on the second arm 1221b and located at a side of the second arm 1221b opposite to the first arm 1221a, that is, when the lock rod 1231 enters the limiting slot 1222 and the locking slot 1223 through the first opening 1222a and the second opening 1223a, the lock member 1232 is also located at a side of the second arm 1221b opposite to the first arm 1221a, thereby facilitating the rotation of the lock member 1232.

The clamp assembly 122 of fig. 10 to 12 is provided with a second chucking plate 1224 having a spacing groove 1222, and the second chucking plate 1224 is connected with a second clamping arm 1221b, whereby the processing of the spacing groove 1222 can be facilitated.

In some embodiments, the retainer slot 1222 may also be disposed on the second clamping arm 1221 b.

In one embodiment, as shown in fig. 10 to 12, the locking member 1232 is a sleeve with an internal thread, the sleeve includes a holding portion 12321 and a second position-limiting portion 12322, and when the lock rod 1231 is in the locking state locked on the clamping assembly 122, the second position-limiting portion 12322 is located in the position-limiting groove 1222.

Specifically, the internal thread is used for being in threaded connection with the external thread on the lock rod 1231, the grip portion 12321 is a portion for an operator to grip and apply force, and the second limiting portion 12322 is used for being matched with the limiting groove 1222 to limit. That is, when it is required to lock the lock lever 1231 to the clamp assembly 122, the operator may rotate the sleeve by grasping the grip portion 12321 to allow the second limiting portion 12322 to enter the limiting groove 1222. When unlocking is required, the operator can also rotate the sleeve by grasping the grip portion 12321 to allow the second stopper portion 12322 to move out of the stopper groove 1222.

The provision of the grip portion 12321 can eliminate the trouble of rotating the lock member 1232 with another tool, whereby the convenience of locking and unlocking the lock lever 1231 can be further improved.

In one embodiment, as shown in fig. 10 to 12, the clamp 120 further includes a rubber pad 124, and the rubber pads 124 are respectively disposed on the clamping surfaces of the two clamping arms 1221.

The clamping face is the one side of clamping arm 1221 centre gripping work piece 2000, and the rubber pad 124 of setting on the clamping face is used for contacting with work piece 2000, and rubber pad 124 not only can provide the frictional force who presss from both sides tight work piece 2000, can also play the cushioning effect, and then can improve anchor clamps 120's centre gripping effect.

It should be noted that, in this document, the term "comprises/comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing shows and describes the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are presented solely for purposes of illustrating the principles of the application and that various changes and modifications may be made without departing from the spirit and scope of the application and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection sought herein is as defined by the following claims and their equivalents.

Claims (10)

1. A lifting device, comprising:

the lifting appliance comprises a main body, wherein the main body comprises a lifting appliance, a clamp and a bolt hole, the clamp and the lifting appliance are of a split structure, and the bolt hole penetrates through the lifting appliance and the clamp;

the connecting assembly comprises a bolt and a first clamping plate which is rotatably arranged on the bolt, and a first limiting part is arranged on the side wall of the bolt; when the first clamping plate is located at a first position on the bolt, the first clamping plate penetrates through the bolt hole along with the bolt, so that the first clamping plate and the first limiting part are respectively located at two opposite sides of the bolt hole; when the first clamping plate penetrating through the bolt hole rotates to a second position, the first clamping plate and the first limiting part are respectively matched with the bolt hole to prevent the bolt from being separated from the main body.

2. The lifting device as recited in claim 1, wherein the axis of rotation of the first catch plate is disposed horizontally such that the first catch plate rotates under the force of gravity from the first position to the second position.

3. The lifting device as recited in claim 2, wherein the first catch plate has a lightening hole on one side of the rotation axis, and the lightening hole is on an upper side of the rotation axis when the first catch plate is rotated to the second position.

4. The hoisting device according to any one of claims 1 to 3, wherein the inside of the bolt is provided with an installation groove which is communicated with the outside through an opening;

when the first clamping plate is located at the first position, the first clamping plate is located in the mounting groove, and when the first clamping plate rotates to the second position, a partial area of the first clamping plate extends out of the opening to the outside of the bolt.

5. The hoisting device as recited in any one of claims 1 to 3, wherein the opposite ends of the pin hole are respectively provided with an inlet and an outlet, the hoisting device comprises a foolproof member disposed around the inlet, and the first limiting portion is in foolproof fit with the foolproof member.

6. The hoist device as claimed in any one of claims 1 to 3, wherein the hoist includes two first connecting portions having first sub-holes, the two first connecting portions being spaced apart, and the clamp includes a second connecting portion having a second sub-hole, the second connecting portion being inserted into a space between the two first connecting portions, the second sub-hole communicating with the two first sub-holes to define the pin hole together.

7. Hoisting device according to any one of claims 1-3, characterized in that the hoisting device comprises a vertical arm and a first transverse arm, the clamp and the vertical arm being arranged at opposite ends of the first transverse arm, respectively.

8. The hoist device of claim 7, wherein the spreader further includes a second cross arm disposed at an end of the vertical arm remote from the first cross arm, and the second cross arm and the clamp are on the same side of the vertical arm.

9. The hoisting device of any one of claims 1-3 wherein the clamp comprises a clamping assembly and a locking assembly; the clamping assembly comprises two clamping arms capable of rotating relatively and a limiting groove with a first opening, and the aperture of the limiting groove is larger than the width of the first opening; a clamping groove with a second opening is formed in the clamping arm and is communicated with the limiting groove; the locking subassembly is including setting up with moving about locking lever on the centre gripping subassembly and with locking member of locking lever threaded connection, the locking lever warp first opening with the second opening gets into the spacing groove with the draw-in groove, the locking member is through following the axial displacement of locking lever makes the at least partial region entering of locking member the spacing groove, the locking member with the spacing groove cooperation will the locking lever locking is in on the centre gripping subassembly.

10. The hoisting device of claim 9 wherein the locking member is a sleeve having internal threads, the sleeve including a gripping portion and a second limiting portion, the second limiting portion being disposed in the limiting groove when the locking rod is in a locked state locked to the clamping assembly.

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