CN110902552B

CN110902552B - Single-wheel hoisting tackle

Info

Publication number: CN110902552B
Application number: CN201911122282.1A
Authority: CN
Inventors: 季丽萍; 郁程; 田玉麟
Original assignee: Changshu Seagull Crane & Hoist
Current assignee: Changshu Seagull Crane & Hoist
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2021-01-05
Anticipated expiration: 2039-11-15
Also published as: CN110902552A

Abstract

The invention discloses a single-wheel hoisting tackle, which relates to the technical field of hoisting tackle, and adopts the technical scheme that the single-wheel hoisting tackle comprises a top plate, two first vertical plates vertically fixed on the top surface of the top plate, fixed pulleys rotatably arranged on the opposite inner sides of the two first vertical plates, and a hook device fixed at the bottom of the top plate, and is characterized in that: the hook device comprises a strip-shaped box fixed at the bottom of the top plate, a bottom plate fixed at the bottom of the strip-shaped box and a hook plate hinged with the end part of the bottom plate; the opposite inner sides of the top plate and the bottom plate are rotatably provided with a screw rod; a sliding block is arranged in the strip-shaped box along the vertical direction in a sliding manner, and the sliding block is in threaded connection with a lead screw; two sides of the bottom plate are respectively provided with a driving mechanism for driving the hook plate to rotate; a rotating assembly for driving the screw rod to rotate is arranged between the fixed pulley and the screw rod. The invention solves the problem that the hanging ring slips and is separated from the lifting hook, and reduces the possibility of separating the hanging ring from the lifting hook.

Description

Single-wheel hoisting tackle

Technical Field

The invention relates to the technical field of hoisting tackle, in particular to a single-wheel hoisting tackle.

Background

At present, a single-wheel hoisting tackle can change the direction of the hoisting tackle and a traction steel cable of a tackle pulley group for many times and hoist or move a heavy object, particularly the tackle pulley group formed by combining the tackle pulleys is matched with a winch, a mast or other hoisting machinery, and is widely applied to building installation operation.

The prior art can refer to the chinese utility model patent of grant bulletin number CN203624931U, and it discloses an unidirectional rotation hoisting tackle, including couple, first backplate, second backplate and pulley, the couple is connected with the one end of first backplate and/or second backplate, and the pulley is located between first backplate and the second backplate, and the pulley passes through the pulley drift bolt and rotates with the other end of first backplate, second backplate to be connected, is equipped with directional bearing between pulley drift bolt and pulley. The directional bearing matched with the pulley is used, so that the pulley can only rotate towards the direction of transferring the heavy object but can not reversely rotate, and the friction force of the rope and the pulley can effectively prevent the heavy object from falling back downwards, thereby improving the working efficiency and the safety.

However, before hoisting the goods, the lifting ring fixed on the goods needs to be sleeved on the lifting hook, and the lifting hook is integrally formed, so that if the lifting ring is close to the inlet end of the lifting hook with the contact section of the lifting hook, the phenomenon that the lifting ring slips and is separated from the lifting hook can occur in the hoisting process, and the goods fall off to cause danger.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a single-wheel hoisting tackle which reduces the possibility of separating a hoisting ring from a hoisting hook by arranging a rotatable hook plate.

In order to achieve the purpose, the invention provides the following technical scheme:

a single-wheel hoisting tackle comprises a top plate, two first vertical plates, a fixed pulley and a hook device, wherein the two first vertical plates are vertically fixed on the top surface of the top plate, the fixed pulley is rotatably installed on the opposite inner sides of the two first vertical plates, and the hook device is fixed at the bottom of the top plate and comprises a strip-shaped box fixed at the bottom of the top plate, a bottom plate fixed at the bottom of the strip-shaped box and a hook plate hinged with the end part of the bottom plate; the opposite inner sides of the top plate and the bottom plate are rotatably provided with a screw rod; a sliding block is arranged in the strip-shaped box in a sliding manner along the vertical direction, and the sliding block is in threaded connection with a lead screw; two sides of the bottom plate are respectively provided with a driving mechanism for driving the hook plate to rotate; and a rotating assembly for driving the screw rod to rotate is arranged between the fixed pulley and the screw rod.

By adopting the technical scheme, before the lifting hook is connected with the pull ring on the goods, the hook plate is driven to rotate towards the side far away from the top plate by the driving mechanism; the back is connected with the lifting hook to being close to roof one side and rotating the hook plate to making the pull ring arrange in between hook plate and the bar box, reducing the pull ring and breaking away from the possibility of lifting hook, through setting up rotatable lifting hook, thereby reduce because the phenomenon of skidding appears between rings and the bottom plate and causes rings and lifting hook separation's possibility.

The invention is further configured to: the rotating assembly comprises a first bevel gear fixed at one end, far away from the bottom plate, of the screw rod and a second bevel gear fixed on one side of the fixed pulley and meshed with the first bevel gear.

By adopting the technical scheme, the fixed pulley drives the second bevel gear to rotate after rotating, the second bevel gear drives the first bevel gear to rotate, and the rotating directions of the fixed pulley are different in the ascending or descending process of the single-wheel hoisting tackle, so that the rotating directions of the lead screw are different, and the sliding block can ascend and descend conveniently through the rotation of the lead screw.

The invention is further configured to: each group of driving mechanisms comprises a first fixed shaft fixed on one side, close to the first vertical plate, of the sliding block, a first connecting rod hinged to one end, far away from the sliding block, of the first fixed shaft, a second connecting rod hinged to one end, far away from the first fixed shaft, of the first connecting rod, a third connecting rod hinged to one end, far away from the first connecting rod, of the second connecting rod, and a fourth connecting rod hinged to one end, far away from the second connecting rod, of the third connecting rod; one end of the fourth connecting rod, which is far away from the third connecting rod, is fixed on one side of the hook plate, which is close to the first connecting rod; and one ends of the two sides of the bottom plate, which are close to the strip-shaped box, are respectively fixed with a second fixed shaft, and one side of each second connecting rod, which is close to the bottom plate, is rotatably connected with one end, which is far away from the bottom plate, of the second fixed shaft.

By adopting the technical scheme, after the sliding block moves downwards, the included angle between the first connecting rod and the second connecting rod is reduced, the second connecting rod drives the third connecting rod to move upwards, the included angle between the third connecting rod and the fourth connecting rod is reduced, the fourth connecting rod rotates upwards, the hook plate is driven to rotate upwards through the fourth connecting rod, the hook plate is driven to rotate conveniently by the up-and-down movement of the sliding block, and before a heavy object is lifted, the hook plate is rotated to one side far away from the strip-shaped box, so that the lifting ring can penetrate through the hook plate conveniently; when the heavy object is lifted, the possibility of separation of the lifting ring and the lifting hook is reduced by rotating the hook plate to one side close to the strip-shaped box.

The invention is further configured to: the top of the sliding block is provided with a circular through hole and two strip-shaped through holes; an internal threaded pipe is rotatably arranged in the circular through hole and is in threaded connection with the lead screw; a pressing block is arranged in each strip-shaped through hole in a sliding manner along the radial direction of the internal thread pipe, and slots for being inserted with the pressing blocks are respectively arranged on two sides of the internal thread pipe; a first spring is fixed on one side of each pressing block, which is far away from the internal threaded pipe, and one end of each first spring, which is far away from the internal threaded pipe, is fixedly connected with one side of the strip-shaped through hole, which is far away from the internal threaded pipe; and a brake assembly for driving the threaded pipe to rotate along with the lead screw is arranged between the sliding block and the bottom plate.

Through adopting above-mentioned technical scheme, when briquetting and slot were pegged graft, the internal thread pipe was in the stationary state, thereby the lead screw rotates and drives the internal thread pipe along vertical removal, is convenient for drive the slider through the internal thread pipe along vertical removal.

The invention is further configured to: the brake assembly comprises two inserting strips which are vertically fixed on the top surface of the bottom plate; and a first inclined plane is respectively arranged on the opposite inner sides of each cutting and the pressing block.

Through adopting above-mentioned technical scheme, the cutting contacts the back with the briquetting, and the cutting removes to keeping away from internal thread pipe one side through first inclined plane drive briquetting, and briquetting and slot separation, internal thread pipe rotate along with the lead screw, and the internal thread pipe stops along vertical removal, and when the slider of being convenient for removed to bar box bottom portion, makes the slider no longer move down through braking component.

The invention is further configured to: a fifth connecting rod and a sixth connecting rod are hinged to the bottom surface of the top plate; one end of the fifth connecting rod, which is far away from the first hinged part, is hinged with a seventh connecting rod, and one end of the seventh connecting rod, which is far away from the fifth connecting rod, is hinged with the first fixed shaft; one end of the sixth connecting rod, which is far away from the second hinge part, is hinged with an eighth connecting rod, and one end of the eighth connecting rod, which is far away from the sixth connecting rod, is hinged with one side of the fifth connecting rod, which is close to the strip box; and one end of the sixth connecting rod, which is far away from the eighth connecting rod, is fixed with a connecting strip, and a fixing component for fixedly connecting the connecting strip and the hook plate is arranged between the connecting strip and the hook plate.

By adopting the technical scheme, in the upward movement process of the sliding block, the included angle between the fifth connecting rod and the seventh connecting rod is reduced, the fifth connecting rod rotates upwards, the fifth connecting rod pushes the sixth connecting rod to rotate upwards through the eighth connecting rod, and the sixth connecting rod pushes the connecting strip to rotate upwards. Through reciprocating the drive connecting strip rotation of slider, through upwards rotating the connecting strip before the hoist and mount goods, reduce the connecting strip and block the possibility that rings and hook plate cup jointed.

The invention is further configured to: the fixing component comprises a fixing plate fixed at one end of the connecting strip, which is far away from the eighth connecting rod, a pressing piece fixed at one side of the fixing plate, which is far away from the connecting strip, a strip-shaped jack arranged at one side of the fixing plate, which is far away from the eighth connecting rod, a square plate fixed at one side of the hook plate, which is far away from the bottom plate, a first square groove and a second square groove arranged at one side of the square plate, which is close to the strip-shaped box, a pressing piece arranged in the first square groove in a sliding manner along the length direction of the hook plate, a plug connector fixed at the bottom of the pressing piece, a plug board arranged in the second square groove in a sliding manner along the width direction of the hook plate and used for being plugged with; the opposite inner sides of the pressing piece and the pressing piece are respectively provided with a second inclined plane; and one side of the inserting plate, which is far away from the strip-shaped box, is fixedly provided with two third springs, and one end of each third spring, which is far away from the inserting plate, is fixedly connected with one side of the second square groove, which is far away from the strip-shaped box.

Through adopting above-mentioned technical scheme, after the piece inserts first square groove, the piece upwards promotes the pressing piece through the second inclined plane to the pressing piece, and the pressing piece drives the plug connector rebound, and the plug connector separates with the bar slot, and the picture peg moves to being close to fixed plate one side under the spring action of third spring to make picture peg and bar jack peg graft, the fixed connection connecting strip and the hook plate of being convenient for.

The invention is further configured to: and a second spring is fixed at the top of the pressing piece, and the top end of the second spring is fixedly connected with the top surface in the first square groove.

By adopting the technical scheme, when the pressing piece is contacted with the pressing piece, the second spring is in a compressed state and applies downward elastic force to the pressing piece; after the pressing piece is separated from the pressing piece, the pressing piece is driven by the second spring to reset downwards.

In summary, compared with the prior art, the invention has the following beneficial effects:

1. the rotatable lifting hook is arranged, so that the possibility that the lifting ring is separated from the lifting hook due to the slipping phenomenon between the lifting ring and the bottom plate is reduced;

2. the hook plate is driven to rotate by the up-and-down movement of the sliding block, and before a heavy object is lifted, the hook plate is rotated to one side far away from the strip-shaped box, so that the lifting ring can conveniently penetrate through the hook plate; when the heavy object is lifted, the possibility of separating the hanging ring from the hanging hook is reduced by rotating the hook plate to one side close to the strip-shaped box;

3. the connecting strip is driven to rotate by the up-and-down movement of the sliding block, and the possibility that the connecting strip blocks the hanging ring to be sleeved with the hook plate is reduced by rotating the connecting strip upwards before the goods are hoisted; after the goods are hoisted, the connecting strip is rotated downwards, and the connecting strip is fixedly connected with the hook plate through the fixing component.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the highlighting drive mechanism of the present invention;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

fig. 4 is an enlarged schematic view of fig. 2 at B.

In the figure: 1. a top plate; 11. a first vertical plate; 12. a fixed pulley; 2. a hooking device; 21. a strip box; 22. a base plate; 23. a hook plate; 24. a lead screw; 3. a drive mechanism; 31. a first fixed shaft; 32. a first link; 33. a second link; 34. a third link; 35. a fourth link; 36. a second fixed shaft; 4. a rotating assembly; 41. a first bevel gear; 42. a second bevel gear; 5. a slider; 51. a circular through hole; 52. a strip-shaped through hole; 53. an internally threaded tube; 54. briquetting; 55. a first spring; 6. a brake assembly; 61. cutting; 62. a first inclined plane; 7. a fifth link; 71. a sixth link; 72. a first hinge member; 73. a second hinge member; 74. a seventh connecting rod; 75. an eighth link; 76. a connecting strip; 8. a fixing assembly; 81. a fixing plate; 82. a pressing member; 83. a strip jack; 84. a square plate; 85. a first square groove; 86. a second square groove; 87. a pressing member; 88. a plug-in unit; 89. inserting plates; 810. a strip-shaped slot; 811. a strip-shaped groove; 812. a second spring; 813. a second inclined plane; 814. a guide through hole; 815. a guide shaft; 816. and a third spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example (b): a single-wheel hoisting tackle is shown in figure 1 and comprises a top plate 1, two first vertical plates 11 vertically fixed on the top surface of the top plate 1, fixed pulleys 12 rotatably installed on the opposite inner sides of the two first vertical plates 11 and a hook device 2 fixed at the bottom of the top plate 1. The hook device 2 comprises a strip-shaped box 21 fixed at the bottom of the top plate 1, a bottom plate 22 fixed at the bottom of the strip-shaped box 21 and a hook plate 23 hinged with the end of the bottom plate 22. A screw rod 24 is rotatably arranged on the opposite inner sides of the top plate 1 and the bottom plate 22; the strip-shaped box 21 is internally provided with a slide block 5 along the vertical direction in a sliding way, and the slide block 5 is in threaded connection with a lead screw 24. The two sides of the bottom plate 22 are respectively provided with a driving mechanism 3 for driving the hook plate 23 to rotate. And a rotating assembly 4 for driving the screw rod 24 to rotate is arranged between the fixed pulley 12 and the screw rod 24. Before the lifting hook is connected with a pull ring on the goods, the hook plate 23 is driven to rotate towards one side far away from the top plate 1 through the driving mechanism 3; after the pull ring is connected with the lifting hook, the hook plate 23 is rotated to one side close to the top plate 1, so that the pull ring is arranged between the hook plate 23 and the strip-shaped box 21, and the possibility that the pull ring is separated from the lifting hook is reduced.

As shown in fig. 1, one end of the screw 24 away from the bottom plate 22 penetrates through the top plate 1, and the rotating assembly 4 includes a first bevel gear 41 fixed to one end of the screw 24 away from the bottom plate 22, and a second bevel gear 42 fixed to one side of the fixed pulley 12 and engaged with the first bevel gear 41. The fixed pulley 12 rotates to drive the second bevel gear 42 to rotate, and the second bevel gear 42 drives the first bevel gear 41 to rotate.

As shown in fig. 1, each set of driving mechanism 3 includes a first fixed shaft 31 fixed on one side of the sliding block 5 close to the first vertical plate 11, a first connecting rod 32 hinged to one end of the first fixed shaft 31 far away from the sliding block 5, a second connecting rod 33 hinged to one end of the first connecting rod 32 far away from the first fixed shaft 31, a third connecting rod 34 hinged to one end of the second connecting rod 33 far away from the first connecting rod 32, and a fourth connecting rod 35 hinged to one end of the third connecting rod 34 far away from the second connecting rod 33. The end of the fourth link 35 away from the third link 34 is fixed to the hook plate 23 on the side close to the first link 32. Second fixing shafts 36 are respectively fixed at two sides of the bottom plate 22 close to one end of the strip-shaped box 21, and one side of each second connecting rod 33 close to the bottom plate 22 is rotatably connected with one end of each second fixing shaft 36 far away from the bottom plate 22. After the slide block 5 moves downwards, the included angle between the first connecting rod 32 and the second connecting rod 33 becomes smaller, the second connecting rod 33 drives the third connecting rod 34 to move upwards, the included angle between the third connecting rod 34 and the fourth connecting rod 35 becomes smaller, the fourth connecting rod 35 rotates upwards, and the hook plate 23 is driven to rotate upwards through the fourth connecting rod 35.

As shown in fig. 2 and 4, a circular through hole 51 and two strip-shaped through holes 52 are formed at the top of the slider 5; the two strip-shaped through holes 52 are respectively arranged at two sides of the circular through hole 51, and the two strip-shaped through holes 52 are respectively communicated with the circular through hole 51. An internal threaded pipe 53 is rotatably mounted in the circular through hole 51, and the internal threaded pipe 53 is in threaded connection with the screw rod 24. A pressing block 54 is arranged in each strip-shaped through hole 52 along the radial direction of the internal thread pipe 53 in a sliding manner, and slots for being inserted into the pressing block 54 are respectively arranged on two sides of the internal thread pipe 53. A first spring 55 is fixed on one side, far away from the internal threaded pipe 53, of each pressing block 54, and one end, far away from the internal threaded pipe 53, of each first spring 55 is fixedly connected with one side, far away from the internal threaded pipe 53, of the strip-shaped through hole 52. A brake assembly 6 for driving the threaded pipe to rotate along with the screw rod 24 is arranged between the sliding block 5 and the bottom plate 22. When the pressing block 54 is inserted into the slot, the internal thread tube 53 is in a fixed state, the lead screw 24 rotates to drive the internal thread tube 53 to move vertically, and the internal thread tube 53 drives the sliding block 5 to move vertically.

As shown in fig. 2 and 4, the brake assembly 6 includes two inserts 61 vertically fixed to the top surface of the base plate 22. The opposite inner sides of each cutting 61 and the pressing block 54 are respectively provided with a first inclined surface 62. After the cutting 61 contacts the pressing block 54, the cutting 61 drives the pressing block 54 to move towards one side away from the internal threaded pipe 53 through the first inclined surface 62, the pressing block 54 is separated from the slot, the internal threaded pipe 53 rotates along with the lead screw 24, and the internal threaded pipe 53 stops moving along the vertical direction.

As shown in fig. 1 and 2, the bottom surface of the top plate 1 is hinged with a fifth connecting rod 7 and a sixth connecting rod 71; a first hinge 72 and a second hinge 73 are fixed to the bottom surface of the top plate 1, the first hinge 72 is hinged to the fifth link 7, and the second hinge 73 is hinged to the sixth link 71. One end of the fifth connecting rod 7, which is far away from the first hinge part 72, is hinged with a seventh connecting rod 74, and one end of the seventh connecting rod 74, which is far away from the fifth connecting rod 7, is hinged with the first fixed shaft 31. The end of the sixth link 71 away from the second hinge 73 is hinged with an eighth link 75, and the end of the eighth link 75 away from the sixth link 71 is hinged with the side of the fifth link 7 close to the strip box 21. A connecting strip 76 is fixed at one end of the sixth connecting rod 71 far away from the eighth connecting rod 75, and a fixing assembly 8 for fixedly connecting the connecting strip 76 and the hook plate 23 is arranged between the connecting strip 76 and the hook plate 23. In the upward movement process of the slider 5, an included angle between the fifth link 7 and the seventh link 74 becomes smaller, the fifth link 7 rotates upward, the fifth link 7 pushes the sixth link 71 to rotate upward through the eighth link 75, and the sixth link 71 pushes the connecting bar 76 to rotate upward.

As shown in fig. 1 and fig. 2, the fixing assembly 8 includes a fixing plate 81 fixed at one end of the connecting bar 76 far from the eighth connecting bar 75, a pressing member 82 fixed at one side of the fixing plate 81 far from the connecting bar 76, a strip-shaped insertion hole 83 arranged at one side of the fixing plate 81 far from the eighth connecting bar 75, and a square plate 84 fixed at one side of the hook plate 23 far from the bottom plate 22, and with reference to fig. 3, the fixing assembly further includes a first square groove 85 and a second square groove 86 arranged at one side of the square plate 84 close to the strip box 21, a pressing member 87 slidably arranged in the first square groove 85 along the length direction of the hook plate 23, a plug-in unit 88 fixed at the bottom of the pressing member 87, an insertion plate 89 slidably arranged in the second square groove 86 along the width direction of the hook plate 23 and used for being inserted into the strip-shaped insertion hole 83, and. The pressing member 87 and the pressing member 82 are respectively provided with a second inclined plane 813 on the opposite inner sides. A strip groove 811 for connecting the first square groove 85 and the second square groove 86 is provided between the first square groove 85 and the second square groove 86. The top of the pressing member 87 is fixed with a second spring 812, and the top end of the second spring 812 is fixedly connected with the inner top surface of the first square groove 85. One side of the plug connector 88, which is far away from the pressing piece 87, is fixed with a dovetail block, one side of the first square groove 85, which is far away from the strip-shaped box 21, is provided with a dovetail groove, and the dovetail block and the dovetail groove are connected in a sliding manner along the length direction of the hook plate 23. Two guide shafts 815 and two third springs 816 are fixed on one side of the inserting plate 89, which is far away from the strip-shaped box 21, each third spring 816 is sleeved on the periphery of one guide shaft 815, and one end of each third spring 816, which is far away from the inserting plate 89, is fixedly connected with one side of the second square groove 86, which is far away from the strip-shaped box 21. Two guiding through holes 814 are opened on one side of the second square groove 86 away from the strip box 21, and each guiding shaft 815 is slidably disposed in one guiding through hole 814 along the width direction of the hook plate 23. After the pressing member 82 is inserted into the first square groove 85, the pressing member 82 pushes the pressing member 87 upwards through the second inclined plane 813, the pressing member 87 drives the plug-in unit 88 to move upwards, the plug-in unit 88 is separated from the strip-shaped slot 810, and the plug plate 89 moves towards one side close to the fixing plate 81 under the action of the elastic force of the third spring 816, so that the plug plate 89 is plugged into the strip-shaped jack 83.

The working principle of the embodiment is as follows:

before the hook is connected with a pull ring on the goods, the fixed pulley 12 rotates to drive the second bevel gear 42 to rotate, and the second bevel gear 42 drives the first bevel gear 41 to rotate. The first bevel gear 41 drives the lead screw 24 to rotate so as to drive the slide block 5 to move upwards. The included angle between the first link 32 and the second link 33 is increased, the second link 33 drives the third link 34 to move downwards, the included angle between the third link 34 and the fourth link 35 is increased, the fourth link 35 rotates downwards, and the fourth link 35 drives the hook plate 23 to rotate downwards. In the upward movement process of the slider 5, an included angle between the fifth link 7 and the seventh link 74 becomes smaller, the fifth link 7 rotates upward, the fifth link 7 pushes the sixth link 71 to rotate upward through the eighth link 75, and the sixth link 71 pushes the connecting bar 76 to rotate upward. After the pull ring is connected with the lifting hook, the fixed pulley 12 rotates reversely, and the hook plate 23 rotates towards one side far away from the top plate 1, so that the pull ring is arranged between the hook plate 23 and the strip-shaped box 21, and the possibility that the pull ring is separated from the lifting hook is reduced.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a single round hoisting block, includes roof (1), is fixed in two riser (11), the rotation of roof (1) top surface is installed in two fixed pulley (12) of the relative inboard of riser (11) and is fixed in hook device (2) of roof (1) bottom, its characterized in that: the hook device (2) comprises a strip-shaped box (21) fixed at the bottom of the top plate (1), a bottom plate (22) fixed at the bottom of the strip-shaped box (21) and a hook plate (23) hinged with the end part of the bottom plate (22); a screw rod (24) is rotatably arranged on the inner side of the top plate (1) opposite to the bottom plate (22); a sliding block (5) is arranged in the strip-shaped box (21) in a sliding manner along the vertical direction, and the sliding block (5) is in threaded connection with a lead screw (24); two sides of the bottom plate (22) are respectively provided with a driving mechanism (3) for driving the hook plate (23) to rotate; a rotating assembly (4) for driving the screw rod (24) to rotate is arranged between the fixed pulley (12) and the screw rod (24);

each group of driving mechanisms (3) comprises a first fixed shaft (31) fixed on one side, close to the first vertical plate (11), of the sliding block (5), a first connecting rod (32) hinged to one end, far away from the sliding block (5), of the first fixed shaft (31), a second connecting rod (33) hinged to one end, far away from the first fixed shaft (31), of the first connecting rod (32), a third connecting rod (34) hinged to one end, far away from the first connecting rod (32), of the second connecting rod (33), and a fourth connecting rod (35) hinged to one end, far away from the second connecting rod (33), of the third connecting rod (34); one end of the fourth connecting rod (35), which is far away from the third connecting rod (34), is fixed on one side, close to the first connecting rod (32), of the hook plate (23); and second fixed shafts (36) are respectively fixed at one ends of the two sides of the bottom plate (22) close to the strip-shaped box (21), and one side of each second connecting rod (33) close to the bottom plate (22) is rotatably connected with one end, far away from the bottom plate (22), of each second fixed shaft (36).

2. A one-wheeled hoisting tackle as claimed in claim 1, wherein: the rotating assembly (4) comprises a first bevel gear (41) fixed at one end of the screw rod (24) far away from the bottom plate (22) and a second bevel gear (42) fixed at one side of the fixed pulley (12) and meshed with the first bevel gear (41).

3. A one-wheeled hoisting tackle as claimed in claim 1, wherein: the top of the sliding block (5) is provided with a circular through hole (51) and two strip-shaped through holes (52); an internal threaded pipe (53) is rotatably mounted in the circular through hole (51), and the internal threaded pipe (53) is in threaded connection with the screw rod (24); a pressing block (54) is arranged in each strip-shaped through hole (52) in a sliding manner along the radial direction of the internal threaded pipe (53), and slots for being inserted into the pressing blocks (54) are respectively formed in two sides of the internal threaded pipe (53); a first spring (55) is fixed on one side, away from the internal threaded pipe (53), of each pressing block (54), and one end, away from the internal threaded pipe (53), of each first spring (55) is fixedly connected with one side, away from the internal threaded pipe (53), of the strip-shaped through hole (52); and a brake assembly (6) for driving the threaded pipe to rotate along with the screw rod (24) is arranged between the sliding block (5) and the bottom plate (22).

4. A one-wheeled hoisting tackle as claimed in claim 3, wherein: the brake assembly (6) comprises two inserting strips (61) which are vertically fixed on the top surface of the bottom plate (22); the opposite inner sides of each cutting (61) and the pressing block (54) are respectively provided with a first inclined surface (62).

5. A one-wheeled hoisting tackle as claimed in claim 1, wherein: a fifth connecting rod (7) and a sixth connecting rod (71) are hinged to the bottom surface of the top plate (1); one end, far away from the top plate (1), of the fifth connecting rod (7) is hinged with a seventh connecting rod (74), and one end, far away from the fifth connecting rod (7), of the seventh connecting rod (74) is hinged with the first fixed shaft (31); one end, far away from the top plate (1), of the sixth connecting rod (71) is hinged with an eighth connecting rod (75), and one end, far away from the sixth connecting rod (71), of the eighth connecting rod (75) is hinged with one side, close to the strip-shaped box (21), of the fifth connecting rod (7); a connecting strip (76) is fixed at one end, far away from the eighth connecting rod (75), of the sixth connecting rod (71), and a fixing assembly (8) for fixedly connecting the connecting strip (76) and the hook plate (23) is arranged between the connecting strip (76) and the hook plate (23).

6. A unicycle lifting tackle as claimed in claim 5, wherein: fixed subassembly (8) including being fixed in fixed plate (81) of connecting strip (76) keeping away from eighth connecting rod (75) one end, be fixed in support pressing piece (82), seting up of connecting strip (76) one side are kept away from in fixed plate (81) bar jack (83) of eighth connecting rod (75) one side, be fixed in square board (84) of keeping away from bottom plate (22) one side hook plate (23), set up in square board (84) are close to first square groove (85) and second square groove (86) of bar box (21) one side, slide along hook plate (23) length direction set up in pressing piece (87) in first square groove (85), be fixed in plug connector (88) of pressing piece (87) bottom, slide along hook plate (23) width direction set up in second square groove (86) just be used for with picture peg (89) that bar jack (83) were pegged graft and set up picture peg (89) top and be used for with plug connector (89) top and plug connector (88) A plugged strip-shaped slot (810); the opposite inner sides of the pressing piece (87) and the pressing piece (82) are respectively provided with a second inclined plane (813); two third springs (816) are fixed on one side, far away from the strip-shaped box (21), of the flashboard (89), and one end, far away from the flashboard (89), of each third spring (816) is fixedly connected with one side, far away from the strip-shaped box (21), of the second square groove (86).

7. A one-wheeled hoisting tackle as claimed in claim 6, wherein: and a second spring (812) is fixed at the top of the pressing piece (87), and the top end of the second spring (812) is fixedly connected with the inner top surface of the first square groove (85).