阅读说明：本技术 吊具 (Lifting appliance ) 是由 方晶 程伟 陈金龙 于 2020-04-29 设计创作，主要内容包括：本发明涉及一种吊具。该吊具包括：第一构件,包括固定部和与固定部相交设置的承载部,吊具通过固定部与目标物体连接；第二构件,包括滑动部和吊接部,滑动部和承载部中的任一者沿第一方向设置有间隔分布且向外凸出的多个第一凸部,滑动部和承载部中的另一者设置有与任一第一凸部相互嵌合的多个第一凹部,以使第二构件相对于第一构件沿第一方向可移动,吊接部用于吊装目标物体；锁定构件,将第二构件定位至第一构件。本发明通过在第一构件和第二构件中的任一者设置多个凸部,在第一构件和第二构件中的另一者设置与任一凸部相互嵌合的多个凹部,使得第二构件相对于第一构件可移动,从而可以调整多种被吊装的目标物体的重心,提高了吊具的通用性。(The invention relates to a lifting appliance. This hoist includes: the first component comprises a fixed part and a bearing part intersected with the fixed part, and the lifting appliance is connected with a target object through the fixed part; the second component comprises a sliding part and a hanging part, wherein a plurality of first convex parts which are distributed at intervals and protrude outwards are arranged on any one of the sliding part and the bearing part along a first direction, a plurality of first concave parts which are mutually embedded with any one of the first convex parts are arranged on the other one of the sliding part and the bearing part, so that the second component can move relative to the first component along the first direction, and the hanging part is used for hanging a target object; a locking member to position the second member to the first member. The invention can adjust the gravity centers of various hoisted target objects and improve the universality of the sling by arranging a plurality of convex parts on one of the first member and the second member and arranging a plurality of concave parts which are mutually embedded with any convex part on the other one of the first member and the second member so that the second member can move relative to the first member.)

1. A spreader, comprising:

the first component (1) comprises a fixed part (11) and a bearing part (12) intersected with the fixed part (11), and the lifting appliance is connected with a target object through the fixed part (11);

a second member (2) including a sliding portion (21) and a hanging portion (22), wherein any one of the sliding portion (21) and the bearing portion (12) is provided with a plurality of first convex portions (a1) which are distributed at intervals and protrude outwards along a first direction (X), the other one of the sliding portion (21) and the bearing portion (12) is provided with a plurality of first concave portions (b1) which are mutually embedded with any one of the first convex portions (a1) so that the second member (2) can move along the first direction (X) relative to the first member (1), and the hanging portion (22) is used for hanging the target object;

a locking member (4) for positioning the second member (2) to the first member (1).

2. A spreader according to claim 1, wherein the number of the second members (2) is two, two of the second members (2) are oppositely arranged, and the first member (1) is arranged between the two second members (2).

3. The spreader according to claim 2, wherein the load-bearing portion (12) of the first member (1) is provided with a plurality of first convex portions (a1) along both sides of its thickness, respectively, and the sliding portion (21) of the second member (2) is provided with a plurality of first concave portions (b 1); alternatively, the plurality of first recesses (b1) of the carrier part (12) are provided throughout the thickness thereof, and the slide part (21) is provided with the plurality of first protrusions (a 1).

4. A spreader according to claim 1 or 2, further comprising a third member (3), the third member (3) comprising oppositely arranged first and second ends (31, 32), the first end (31) being angularly adjustable relative to the suspension portion (22) of the second member (2), the second end (32) being provided with a suspension aperture (33).

5. A spreader according to claim 4, wherein either one of the hitching section (22) and the first end (31) of the third member (3) is provided with a plurality of second protrusions (a2) distributed in an annular array and projecting outwardly, and the other one of the hitching section (22) and the first end (31) is provided with a plurality of second recesses (b2) interfitting with either one of the second protrusions (a2) so that the angle of the third member (3) relative to the hitching section (22) is adjustable.

6. The spreader according to claim 4, wherein the locking member (4) comprises a locking bar (41);

the lock rod (41) penetrates through the bearing part (12) and the sliding part (21) to lock or unlock the first member (1) and the second member (2);

and/or the lock rod (41) penetrates through the hanging part (22) and the first end (31) of the third component (3) so as to lock or unlock the second component (2) and the third component (3).

7. A spreader according to claim 6, wherein either one of the carrier (12) and the slide (21) is provided with a runner (c) extending in the first direction (X), the other one of the carrier (12) and the slide (21) is provided with a through hole (d), and the locking bar (41) passes through the runner (c) and the through hole (d) to locate the second member (2) to the first member (1).

8. The spreader according to claim 7, wherein the runner (c) is provided on at least one side of the plurality of first convex portions (a1) or the plurality of first concave portions (b 1); alternatively, the slide groove (c) may be formed through the plurality of first protrusions (a1) or the plurality of first recesses (b 1).

9. The spreader according to claim 6, wherein the locking member (4) further comprises an adjustment mechanism (42), an eccentric cam mechanism (43) and an end plate (44), the adjustment mechanism (42) being disposed between the two second members (2), the eccentric cam mechanism (43) being disposed at one axial end of the lock rod (41), the end plate (44) being disposed at the other axial end of the lock rod (42), the eccentric cam mechanism (43) being rotated to adjust the distance between the two second members (2).

10. The spreader according to claim 9, wherein the adjustment mechanism (42) comprises a first sleeve (421) and a second sleeve (422) fitted around an outer circumference of the first sleeve (421), and a compression spring (423) disposed between the first sleeve (421) and the second sleeve (422), the first sleeve (421) being connected to one of the second members (2), and the second sleeve (422) being connected to the other of the second members (2).

11. The spreader according to claim 9, wherein the adjustment mechanism (42) comprises a first connection portion (42a) and a second connection portion (42b) which are oppositely arranged, the first connection portion (42a) is provided with a plurality of third convex portions (a3) which are distributed at intervals along the first direction (X), the second connection portion (42b) is provided with a plurality of third concave portions (b3) which are matched with any one of the third convex portions (a3), the first connection portion (42a) is arranged on one of the second members (2), and the second connection portion (42b) is arranged on the other second member (2).

12. The spreader according to claim 9, wherein the eccentric cam mechanism (43) includes an eccentric wheel (431), a pin shaft (432), and an operating handle (433), the pin shaft (432) passes through a rotation center of the eccentric wheel (431) and the lock lever (41), the eccentric wheel (431) has a first plane (P1) and a second plane (P2) which are parallel to an axial direction of the eccentric wheel (431) and disposed at a predetermined angle, the operating handle (433) is disposed at a side of the eccentric wheel (431) opposite to the first plane (P1), a distance between the rotation center and the first plane (P1) is L1, a distance between the rotation center and the second plane (P2) is L2, and L1< L2.

13. The spreader according to claim 12, wherein the eccentric cam mechanism (43) further comprises a lock (434), the lock (434) being used to secure the operating handle (433) to the second member (2) when the spreader is locked.

14. A spreader according to claim 1, characterised in that the first member (1) is further provided with a guide (13) parallel to the first direction (X) and projecting outwards, the second member (2) is provided with a slider in contact with the guide (13), or the edge of the second member (2) is in contact with the guide (13).

Technical Field

The invention relates to the technical field of wind power generation, in particular to a lifting appliance.

Background

The hub of the wind generating set is generally in a hollow spherical shape with uneven thickness, and 3 blades are uniformly distributed. At present, the mode of assembling the blades is that three blades and a hub are assembled on the ground or a deck, and then the blades and the hub are integrally hoisted to a generator at the top of a tower through a hoisting tool to complete butt joint. Because the blade barycenter of different wing types is different, the barycenter or the elevation angle of the hub needs to be adjusted during integral hoisting. However, the existing lifting appliance has a single function, only one or two types of blades and corresponding hubs can be lifted, and the lifting requirements of various blades and hubs cannot be met simultaneously.

Disclosure of Invention

The invention aims to provide a lifting appliance which can adjust the gravity center of various lifted objects.

To this end, the invention provides a spreader comprising: the first component comprises a fixed part and a bearing part intersected with the fixed part, and the lifting appliance is connected with a target object through the fixed part; the second component comprises a sliding part and a hanging part, wherein a plurality of first convex parts which are distributed at intervals and protrude outwards are arranged on any one of the sliding part and the bearing part along a first direction, a plurality of first concave parts which are mutually embedded with any one of the first convex parts are arranged on the other one of the sliding part and the bearing part, so that the second component can move relative to the first component along the first direction, and the hanging part is used for hanging a target object; a locking member for positioning the second member to the first member.

According to one aspect of the present invention, the number of the second members is two, the two second members are oppositely disposed, and the first member is disposed between the two second members.

According to one aspect of the present invention, the bearing portion of the first member is provided with a plurality of first convex portions along both sides of the thickness thereof, respectively, and the sliding portion of the second member is provided with a plurality of first concave portions; alternatively, the plurality of first concave portions of the bearing portion are provided through the thickness thereof, and the sliding portion is provided with a plurality of first convex portions.

According to one aspect of the invention, the spreader further comprises a third member comprising a first end and a second end arranged opposite to each other, the first end being angularly adjustable relative to the suspension portion of the second member, the second end being provided with a suspension hole.

According to an aspect of the present invention, either one of the hanging part and the first end of the third member is provided with a plurality of second protrusions which are distributed in an annular array and protrude outward, and the other one of the hanging part and the first end is provided with a plurality of second recesses into which any one of the second protrusions is fitted, so that an angle of the third member with respect to the hanging part is adjustable.

According to an aspect of the present invention, the locking member includes a lock bar penetrating the bearing part and the sliding part to lock or unlock the first member with the second member; and/or the lock rod penetrates through the hanging part and the first end of the third component so as to lock or unlock the second component and the third component.

According to an aspect of the present invention, either one of the bearing portion and the sliding portion is provided with a slide groove extending in the first direction, and the other one of the bearing portion and the sliding portion is provided with a through hole through which the lock lever passes to position the second member to the first member.

According to an aspect of the present invention, the sliding groove is provided at least one side of the plurality of first convex portions or the plurality of first concave portions; alternatively, the slide groove is provided through the plurality of first convex portions or the plurality of first concave portions.

According to an aspect of the present invention, the locking member further includes an adjustment mechanism disposed between the two second members, an eccentric cam mechanism disposed at one axial end of the lock rod, and an end plate disposed at the other axial end of the lock rod, the eccentric cam mechanism being rotated to adjust a distance between the two second members.

According to one aspect of the present invention, the adjusting mechanism includes a first sleeve, a second sleeve sleeved on an outer circumferential side of the first sleeve, and a compression spring disposed between the first sleeve and the second sleeve, the first sleeve is connected to one of the second members, and the second sleeve is connected to the other of the second members.

According to one aspect of the invention, the adjusting mechanism comprises a first connecting part and a second connecting part which are oppositely arranged, the first connecting part is provided with a plurality of third convex parts which are distributed at intervals along the direction towards the second connecting part, the second connecting part is provided with a plurality of third concave parts which are matched with any one of the third convex parts, the first connecting part is arranged on one of the second components, and the second connecting part is arranged on the other second component.

According to one aspect of the present invention, an eccentric cam mechanism includes an eccentric wheel, a pin shaft, and an operating handle, the pin shaft passing through a rotating shaft of the eccentric wheel and a lock lever, the eccentric wheel having a first plane and a second plane parallel to the rotating shaft and disposed at a predetermined angle, the operating handle being disposed on a side of the eccentric wheel opposite to the first plane, a distance between the rotating shaft and the first plane being L1, a distance between the rotating shaft and the second plane being L2, and L1< L2.

According to one aspect of the invention, the eccentric cam mechanism further comprises a locking member for securing the operating handle to the second member when the spreader is locked.

According to an aspect of the present invention, the first member is further provided with a guide portion that is parallel to the first direction and protrudes outward, the second member is provided with a slider that contacts the guide portion, or an edge of the second member contacts the guide portion.

The invention provides a lifting appliance, which can adjust the gravity centers of various lifted target objects and improve the universality of the lifting appliance by arranging a plurality of convex parts on one of a first member and a second member and arranging a plurality of concave parts which are mutually embedded with the convex parts on the other one of the first member and the second member, so that the second member can move relative to the first member.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Fig. 1 is a schematic structural diagram of a spreader according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of an assembled portion of a first member and a second member of the spreader of FIG. 1;

FIG. 3 is a schematic structural view of a first member of the spreader of FIG. 1;

FIG. 4 is a schematic structural view of a second member of the spreader of FIG. 1;

fig. 5 is a schematic structural diagram of another spreader provided by the embodiment of the invention;

FIG. 6 is a schematic view of a partially exploded view of the spreader of FIG. 5;

fig. 7 is a schematic structural diagram of another spreader provided by the embodiment of the invention;

FIG. 8 is an exploded schematic view of the spreader of FIG. 7;

fig. 9 is a schematic view of an adjustment mechanism in the spreader of fig. 7;

fig. 10 is a schematic view of an alternative adjustment mechanism in the spreader of fig. 7;

fig. 11 is a partial schematic structural view of the spreader of fig. 7 in a locked condition;

fig. 12 is a partial schematic structural view of the spreader of fig. 7 in an unlocked state;

fig. 13 is a schematic view of the lifting hub of the lifting tool shown in fig. 7.

Description of reference numerals:

1-a first member; 11-a fixed part; 12-a carrier part; x-a first direction; a1 — first projection; b1 — first recess; c-a chute; d-a through hole; 13-a guide;

2-a second member; 21-a sliding part; 22-a hanging part;

3-a third member; 31-first end 3; 32-a second end; 33-a hanging hole; a 2-second projection; b2 — second recess;

4-a locking member; 41-locking bar; 42-an adjustment mechanism; 421-a first sleeve; 422-a second sleeve; 423-compression spring; 42 a-first connection; 42 b-a second connecting portion; a 3-third projection; b 3-third recess; 43-an eccentric cam mechanism; 44-an end plate; 431-eccentric wheel; 432-pin shaft; 433-an operating handle; 434-locking member; p1-first plane; p2-second plane.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The following description is given with reference to the orientation words as shown in the drawings, and is not intended to limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

For better understanding of the present invention, a spreader provided by an embodiment of the present invention will be described in detail below with reference to fig. 1 to 12.

Referring to fig. 1 and fig. 2 together, an embodiment of the present invention provides a spreader, including: a first member 1, a second member 2 and a locking member 4.

The first member 1 includes a fixing portion 11 and a carrying portion 12 intersecting the fixing portion 11, and the hanger is connected to the target object through the fixing portion 11. The fixing portion 11 may be provided with a plurality of positioning holes 111, the target object is provided with corresponding positioning holes, and the fastening member passes through the positioning holes 111 of the fixing portion 11 and the positioning holes of the target object to fixedly connect the first member 1 with the target object.

The second member 2 includes a sliding portion 21 and a hanging portion 22, one of the sliding portion 21 and the carrying portion 12 is provided with a plurality of first protruding portions a1 spaced apart and protruding outward along the first direction X, the other of the sliding portion 21 and the carrying portion 12 is provided with a plurality of first recessed portions b1 fitted to any one of the first protruding portions a1, so that the second member 2 is movable relative to the first member 1 along the first direction X, and the hanging portion 22 is used for hanging a target object.

The locking member 4 is used to position the second member 2 to the first member 1. In actual use, the relative position between the second member 2 and the first member 1 is calculated in advance according to the gravity center of the hoisted target object, so that the second member 2 and the first member 1 can be locked by the locking member 4.

In some embodiments, as shown in fig. 2, the bearing part 12 of the first member 1 is provided with a plurality of first concave parts b1 which are concave inwards along the first direction X, and the sliding part 21 of the second member 2 is provided with a plurality of first convex parts a1 which are convex outwards along the first direction X, and since the first convex parts a1 can be mutually engaged with any one of the first concave parts b1, the second member 2 can move back and forth along the first direction X relative to the first member 1, so that the gravity center of various hoisted target objects can be adjusted.

In some embodiments, the bearing part 12 of the first member 1 is provided with a plurality of first convex parts a1 protruding outwards along the first direction X, the sliding part 21 of the second member 2 is provided with a plurality of first concave parts b1 recessed inwards along the first direction X, and since the first concave parts b1 can be mutually embedded with any one of the first convex parts a1, the second member 2 can move back and forth along the first direction X relative to the first member 1, so that the gravity center of various hoisted target objects can be adjusted.

The first convex part a1 can be a tooth part with various shapes such as triangle, trapezoid, rectangle, quadrangle, herringbone and the like, the first convex part a1 and the first concave part b1 are mutually embedded to form a structure similar to tooth-to-tooth meshing, stress is balanced, lifting strength cannot be affected after the first convex part a1 and the first concave part b1 are adjusted along the first direction X or the first convex part a1 and the first concave part b1 which are mutually embedded are replaced, and lifting safety is guaranteed.

The size of the first convex part a1 or the first concave part b1 can be set as small as possible while satisfying the hoisting strength, so that the first member 1 and the second member 2 can be finely adjusted within a small displacement range, the accuracy of adjusting the center of gravity is improved compared with a mode of forming a plurality of positioning holes in the first member 1 or the second member 2, and meanwhile, the lifting appliance can be suitable for hoisting target objects of more different types.

In addition, since the second member 2 is movable relative to the first member 1, the length dimension of the second member 2 in the first direction X may be smaller than the length dimension of the first member 1 in the first direction X, reducing the weight of the spreader.

According to the lifting appliance provided by the embodiment of the invention, the plurality of first convex parts a1 are arranged on one of the first member 1 and the second member 2, and the plurality of first concave parts b1 which are mutually embedded with any first convex part a1 are arranged on the other one of the first member 1 and the second member 2, so that the second member 2 can move relative to the first member 1, the gravity centers of various lifted target objects can be adjusted, and the universality of the lifting appliance is improved.

Referring to fig. 2 to 4, the locking member 4 includes a locking rod 41, and the locking rod 41 penetrates through the bearing portion 12 and the sliding portion 21 to lock or unlock the first member 1 and the second member 2. The locking rod 41 may be a bolt, and the locking member 4 further includes a nut, a washer, and the like, wherein the nut and the bolt are tightened to lock the first member 1 and the second member 2, and the nut and the bolt are loosened to unlock the first member 1 and the second member 2.

In order to enable the locking member 4 to still lock the first member 1 and the second member 2 as the second member 2 and the first member 1 move relative to each other, either one of the carrier part 12 and the sliding part 21 is provided with a slide groove c extending in the first direction X, and the other one of the carrier part 12 and the sliding part 21 is provided with a through hole d through which the lock lever 41 passes to position the second member 2 to the first member 1.

As shown in fig. 3 and 4, if the length dimension of the second member 2 along the first direction X is smaller than the length dimension of the first member 1 along the first direction X, the sliding groove c may be provided in the first member 1 and the through hole d may be provided in the second member 2 to expand the adjustable range of the spreader along the first direction X.

If the length dimension of the second member 2 in the first direction X is substantially equal to the length dimension of the first member 1 in the first direction X, the slide groove c may be provided in either one of the first member 1 and the second member 2, and the through hole d may be provided in the other one of the first member 1 and the second member 2.

In some embodiments, the sliding groove c is disposed on at least one side of the plurality of first protrusions a1 or the plurality of first recesses b 1. In some embodiments, the sliding groove c is disposed through the plurality of first protrusions a1 or the plurality of first recesses b 1. Alternatively, the number of the locking members 4 is at least two, and accordingly, the number of the through holes d is at least two.

As shown in fig. 3, the slide groove c is provided through the plurality of first protrusions a1 of the first member 1, two through holes d are provided in the second member 2, and the first member 1 and the second member 2 are locked by the two locking members 4.

As an alternative embodiment, as shown in fig. 1, the first member 1 is further provided with a guide portion 13 protruding outward in parallel with the first direction X, and the second member 2 is provided with a slider (not shown) contacting with the guide portion 13, or an edge of the second member 2 contacts with the guide portion 13, so as to assist the second member 2 to adjust its relative position with the first member 1 along the first direction X, prevent displacement, and improve the adjustment efficiency.

In addition to the need to adjust the center of gravity, the target object may also need to adjust the pitch angle during assembly to facilitate docking with other components.

Referring to fig. 5 and 6, the spreader further includes a third member 3, the third member 3 includes a first end 31 and a second end 32, the first end 31 is disposed opposite to the hanging portion 22 of the second member 2, the angle of the first end 31 is adjustable, and the second end 32 is disposed with a hanging hole 33. The hanging holes 33 are used for connecting the hooks of the hanging device.

Further, either one of the hanger 22 and the first end 31 of the third member 3 is provided with a plurality of second protrusions a2 distributed in an annular array and protruding outward, and the other one of the hanger 22 and the first end 31 is provided with a plurality of second recesses b2 fitted with either one of the second protrusions a2, so that the angle of the third member 3 with respect to the hanger 22 is adjustable.

The second convex portion a2 can be a tooth portion with various shapes such as triangle, trapezoid, rectangle, quadrangle, herringbone and the like, the second convex portion a2 and the second concave portion b2 are mutually embedded to form a structure similar to tooth-to-tooth meshing, stress is balanced, lifting strength cannot be affected due to circumferential rotation of the second convex portion a2 and the second concave portion b2 or replacement of the mutually embedded second convex portion a2 and the second concave portion b2, and lifting safety is guaranteed.

In actual use, the pitch angle of the target object can be calculated in advance according to the butt joint angle between the hoisted target object and other objects to determine the included angle between the third member 3 and the second member 2, and then the third member 3 is rotated to rotate the first end 31 to a predetermined angle relative to the hoisting part 22 of the second member 2, and the first end is mutually embedded with the second concave part b2 through the second convex part a 2.

Further, the locking lever 41 of the locking member 4 may pass through the hanging part 22 and the first end 31 of the third member 3 to lock or unlock the second member 2 and the third member 3.

Alternatively, as shown in fig. 6, the sliding portion 21 may be provided with a horizontal scale along the first direction X, and the hanging portion 22 may be provided with an angle scale, so that an operator can adjust each component to a proper position.

Thus, in the spreader of the embodiment of the present invention, the center of gravity of the target object is adjusted by the mutual engagement of the first convex portion a1 and the first concave portion b1, the pitch angle of the target object is adjusted by the mutual engagement of the second convex portion a2 and the second concave portion b2, the second member 2 and the first member 1, and the second member 2 and the third member 3 are locked by the locking member 4, respectively, and then the hook is hooked to the hook hole 33 to hook the target object.

Referring to fig. 7 to 9, another spreader according to an embodiment of the present invention is similar to the spreader shown in fig. 1 to 5, except that the number of the second members 2 is two, the two second members 2 are disposed opposite to each other, and the first member 1 is disposed between the two second members 2.

In the present embodiment, when the spreader has only a function of adjusting the center of gravity of the target object, that is, the spreader includes the first member 1 and the two second members 2.

Alternatively, the bearing part 12 of the first member 1 is provided with a plurality of first protrusions a1 along both sides of its thickness, respectively, and the sliding part 21 of the second member 2 is provided with a plurality of first recesses b1, so that the first recesses b1 of the two second members 2 and the first protrusions a1 of the first member 1 are fitted to each other, respectively.

Alternatively, the plurality of first recesses b1 of the carrier part 12 of the first member 1 are provided throughout the thickness thereof, and the sliding part 21 of the second member 2 is provided with the plurality of first protrusions a1, so that the first protrusions a1 of the two second members 2 and the first recesses b1 of the first member 1 are fitted to each other, respectively.

When the spreader has a function of adjusting the pitch angle of the target object in addition to the function of adjusting the center of gravity of the target object, that is, the spreader includes the first member 1, the third member 3, and the two second members 2.

Alternatively, the first end 31 of the third member 3 is provided with a plurality of second protrusions a2 along both sides of its thickness, and the suspension portion 22 of the second member 2 is provided with a plurality of second recesses b2 toward the third member 3, so that the second recesses b2 of the two second members 2 are respectively fitted with the second protrusions a2 of the third member 3.

Alternatively, the first end 31 of the third member 3 is provided with a plurality of second recesses b2 along both sides of its thickness, and the suspension portion 22 of the second member 2 is provided with a plurality of second protrusions a2 toward the third member 3, so that the second protrusions a2 of the two second members 2 and the second recesses b2 of the third member 3 are engaged with each other.

In addition, the number of the locking members 4 is at least two, one of the locking members 4 is used for locking or unlocking the first end 31 of the third member 3 and the hanging part 22 of the second member 2, at least one of the locking members 4 is used for locking or unlocking the bearing part 12 of the first member 1 and the sliding part 21 of the second member 2, and for example, the locking rods 41 of the two locking members 4 shown in fig. 8 are respectively arranged through the bearing part 12 and the sliding part 21.

Referring to fig. 8 to 12, in order to improve the convenience of locking or unlocking the hanger, in the hanger according to the embodiment of the present invention, the locking member 4 further includes an adjusting mechanism 42, an eccentric cam mechanism 43 and an end plate 44, the adjusting mechanism 42 is disposed between the two second members 2, the eccentric cam mechanism 43 is disposed at one axial end of the lock rod 41, the end plate 44 is disposed at the other axial end of the lock rod 42, and the eccentric cam mechanism 43 rotates to adjust the distance between the two second members 2.

Since the locking bars 41 of the two locking members 4 are respectively disposed through the bearing part 12 of the first member 1 and the sliding part 21 of the second member 2, the end plates 44 of the two locking members 4 may be integrally provided, and the locking bar 41 of one locking member 4 is disposed through the first end 31 of the third member 3 and the hanging part 22 of the second member 2, the end plates 44 of the locking members 4 are separately provided, as shown in fig. 8.

In some embodiments, as shown in fig. 9 and 11, the adjusting mechanism 42 includes a first sleeve 421 and a second sleeve 422 sleeved on an outer periphery of the first sleeve 421, and a compression spring 423 disposed between the first sleeve 421 and the second sleeve 422, wherein the first sleeve 421 is connected to one of the second members 2, and the second sleeve 422 is connected to the other second member 2.

Optionally, the minimum compression dimension of the compression spring 423 is greater than or equal to the thickness dimension of the first member 1 to ensure that the friction between the members is as small as possible when the spreader is locked. In addition, the maximum extension dimension of the compression spring 423 is larger than or equal to the thickness dimension of the first convex portion a1 and the first concave portion b1 which are mutually embedded, or the thickness dimension of the second convex portion a2 and the second concave portion b2 which are mutually embedded, so that the first member 1 and the second member 2 can be separated and can move mutually, or the third member 3 and the second member 2 can be separated and can rotate mutually when the lifting appliance is unlocked.

In some embodiments, as shown in fig. 10, the adjusting mechanism 42 includes a first connecting portion 42a and a second connecting portion 42b that are oppositely disposed, the first connecting portion 42a is provided with a plurality of third protruding portions a3 distributed at intervals along the first direction X, the second connecting portion 42b is provided with a plurality of third recessed portions b3 that cooperate with any one of the third protruding portions a3, the first connecting portion 42a is disposed on one of the second members 2, and the second connecting portion 42b is disposed on the other second member 2.

Alternatively, the third protrusion a3 is a tooth part with various shapes such as triangle, trapezoid, rectangle, quadrangle, herringbone, etc., the third protrusion a3 and the third recess b3 are mutually embedded to form a structure similar to tooth-to-tooth meshing, the two are mutually movable, and the thickness dimension of the mutual embedding of the third protrusion a3 and the third recess b3 is larger than that of the first member 1, so as to ensure that the friction between the members is as small as possible when the hanger is locked. In addition, the thickness dimension of the third protrusion a3 and the third recess b3 which are mutually embedded is smaller than the thickness dimension of the first protrusion a1 and the first recess b1 which are mutually embedded, or the thickness dimension of the second protrusion a2 and the second recess b2 which are mutually embedded, so that the first member 1 and the second member 2 can be separated and can move mutually, or the third member 3 and the second member 2 can be separated and can rotate mutually when the lifting appliance is unlocked.

As shown in fig. 11 and 12, the eccentric cam mechanism 43 includes an eccentric wheel 431, a pin shaft 432, and an operating handle 433, the pin shaft 432 passes through a rotation center of the eccentric wheel 431 and the lock lever 41, the eccentric wheel 431 has a first plane P1 and a second plane P2 which are parallel to an axial direction of the eccentric wheel 431 and are disposed at a predetermined angle, the operating handle 433 is disposed at a side of the eccentric wheel 431 opposite to the first plane P1, a distance between the rotation center and the first plane P1 is L1, a distance between the rotation center and the second plane P2 is L2, and L1< L2.

Optionally, the first plane P1 and the second plane P2 are perpendicular to each other, facilitating the operator to lock or unlock the spreader.

As shown in fig. 11, when the operating handle 433 is rotated vertically downward, the second plane P2 contacts one of the second members 2, and pushes the second member 2 to move toward the other second member 2 under the action of the adjusting mechanism 42, the distance between the two members is reduced, the first convex portion a1 and the first concave portion b1 are engaged with each other, and the second convex portion a2 and the second concave portion b2 are engaged with each other, so that the hanger is locked, and the target object starts to be lifted.

As shown in fig. 12, when the operating handle 433 is rotated to the horizontal direction, the first plane P1 contacts one of the second members 2, the two second members 2 are pushed apart by the adjusting mechanism 42, the distance between the two second members is increased, the first convex portion a1 and the first concave portion b1, and the second convex portion a2 and the second concave portion b2 are respectively engaged with each other and disengaged from each other, the hanger is unlocked, and unloading of the target object is started.

In the lifting appliance of the embodiment of the invention, the locking member 1 adopts the eccentric cam mechanism 43, the unlocking or locking operation is simple, and compared with a tightening scheme of fasteners such as bolts, the risk that a target object and the lifting appliance fall off due to loosening of the bolts in the lifting process can be avoided.

Optionally, the eccentric cam mechanism 43 further comprises a locking member 434, the locking member 434 being used to fix the operating handle 433 to the second member 2 when the spreader is locked. Optionally, the locking member 434 may be a bolt, a through hole is formed in the operating handle 433, a threaded hole is formed in the second member 2, and the locking member 434 fixes the operating handle 433 to the second member 2 through a threaded fit, so that the eccentric wheel 431 is prevented from rotating to unlock the lifting tool in the lifting process, and the reliability of the locking member 4 is further improved.

Therefore, in the lifting appliance provided by the embodiment of the invention, the relative displacement or angle between the components is realized by the mutual embedding of the concave part and the convex part, the locking and unlocking of the lifting appliance is realized by the locking component 4 with the eccentric wheel 431, the bolt does not need to be screwed or loosened, the risks of falling and the like are avoided, the field installation time is greatly saved, and the lifting efficiency is greatly improved.

Fig. 13 is a schematic view of the lifting hub of the lifting tool shown in fig. 7.

As shown in fig. 13, the relative position between the second member 2 and the first member 1 is calculated in advance from the center of gravity of the hub, the pitch angle of the hub is calculated in advance from the docking angle of the hub and the generator, the second member 2 is moved to the calculated position with respect to the first member 1 in the first direction X, the third member 3 is rotated to the calculated pitch angle with respect to the second member 2 about the Y axis, and the spreader is locked by the locking member 4. The hub is connected to the fixing portion 11 of the first member 1 of the hanger, and the hook is connected to the hanging hole 33 of the third member 3, and the hoisting operation is started.

When a single hub or a hub and blade of different types need to be hoisted integrally, the second member 2 only needs to be moved to a preset position relative to the first member 1 along the first direction X, the third member 3 rotates to a preset angle around the Y axis relative to the second member 2, and the hoisting tool is locked through the locking member 4.

In addition, the lifting appliance according to the above-described exemplary embodiments may be used for lifting a target object in any structural form, and will not be described in detail.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.