CN116675129B

CN116675129B - Automatic change jack-up electric block

Info

Publication number: CN116675129B
Application number: CN202310591295.3A
Authority: CN
Inventors: 顾海清; 朱敏刚; 周辉
Original assignee: NOVOCRANE (SUZHOU) CO LTD
Current assignee: NOVOCRANE (SUZHOU) CO LTD
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2024-01-26
Anticipated expiration: 2043-05-24
Also published as: CN116675129A

Abstract

The invention discloses an automatic hoisting electric hoist, which comprises two movable rollers, wherein a spiral wire conveying groove is formed in the outer wall of each movable roller, a hanging chain is wound between the two movable rollers, the output end of the hanging chain extends downwards, and a lifting hook is arranged at the outer end part of the hanging chain; through adopting the mode of adjusting the distance between two movable rollers, realize adjusting lifting hook vertical movement position, can conveniently carry out accurate calculation and accuse to article lifting height position, thereby the accuracy of lifting by crane has been improved, simultaneously because only twine the individual layer hanging chain on the movable roller, the phenomenon that the hanging chain dislocation was tied off can effectively be avoided taking place, guarantee equipment normal operating, and the hanging chain transport position remains fixed throughout, thereby the convenience makes lifting hook and article keep vertical removal when lifting by crane, the phenomenon that the article that avoids the frequent change of hanging chain transport position to lead to rocked takes place, the stability of lifting by crane work is improved.

Description

Automatic change jack-up electric block

Technical Field

The invention relates to the technical field of hoisting conveying equipment, in particular to an automatic hoisting electric hoist.

Background

The electric hoist is hoisting equipment, and mainly depends on a roller to roll or pay off a cable to drive a lifting hook to move up and down, and the lifting hook can hoist an object, and is generally arranged on equipment such as a gantry bridge, a crown block, a hoisting frame and the like.

When the existing electric hoist is used, the existing electric hoist has the large defects, the lifting mode of the electric hoist mainly depends on the rotation of the roller to realize the lifting of the lifting hook, however, when the roller winds or drops a cable, the cable is easy to wind on the roller in a dislocation mode, the cable is easy to knot and is blocked, the normal rotation of the roller is affected, and when the roller rotates, the output position of the cable on the roller is changed at any time, so that an object is easy to shift along with the cable in synchronization during lifting, and the object cannot be accurately positioned.

Disclosure of Invention

In order to solve the technical problems, the invention provides an automatic hoisting electric hoist.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

an automatic change crane electric block, includes two movable rollers, has seted up spiral wire groove on the movable roller outer wall, twines between two movable rollers has the hanging chain, and the output of hanging chain stretches out downwards, and the outer tip of hanging chain is provided with the lifting hook.

Further, a plurality of first U-shaped conveying wheels are rotationally embedded in the spiral conveying groove on the moving roller.

Further, the device also comprises an outer box body, wherein the two movable rollers are positioned in the outer box body, the inside of the movable roller is hollow, a rotating shaft is inserted in the middle of the movable roller, the rotating shaft is rotationally connected with the movable roller, a plurality of transmission discs are arranged on the outer wall of the rotating shaft in the movable roller, one side of the first U-shaped conveying wheel is positioned in the wire conveying groove, the other side of the first U-shaped conveying wheel extends into the movable roller, and the transmission discs are in transmission connection with the first U-shaped conveying wheel;

straight gears are arranged at two ends of the rotating shaft, straight gear rows are meshed with the straight gears, and the straight gear rows are fixed in the outer box body.

Further, the hanging chains on each movable roller are provided with one output end, and the two output ends are connected with the hanging hooks at the same time.

Further, the outer box bottom is provided with fixed frame, and fixed frame rotation is provided with two back shafts, is provided with the second U type delivery wheel on the back shaft, is provided with a plurality of clamping edges on the second U type delivery wheel inner wall, passes fixed frame and overlap joint on the second U type delivery wheel inner wall, and the clamping edge on the second U type delivery wheel inserts in the space of chain link on the hoist chain.

Further, be provided with T type frame on the fixed frame inner wall, two outer ends of T type frame all are provided with U type cardboard, and U type cardboard is detained and is established in the outside of hanging chain and second U type delivery wheel.

Further, the outside cover of back shaft is equipped with the swivel becket, is provided with a plurality of leaf springs on the inner wall of swivel becket, and the leaf spring is connected with the back shaft to make back shaft and swivel becket pass through leaf spring elastic connection, be provided with counter weight arc tooth row on the outer wall of swivel becket, a plurality of leaf springs gather and the position of a plurality of leaf springs is relative with counter weight arc tooth row's position, and counter weight arc tooth row's outside cover is equipped with the ring gear, and the ring gear is fixed on fixed frame inner wall.

Further, the fixed frame is rotatably provided with a first worm, two first worm gears are arranged on the first worm in a meshed mode, and the first worm gears are fixed on the supporting shaft.

Further, bases are fixed at two ends of the moving roller, the rotating shaft penetrates through the bases and is connected in a rotating mode, guide plates are arranged on the bases and slide relative to the bases, and the guide plates are fixed on the inner wall of the outer box body;

two screw rods are rotatably arranged in the outer box body, the two screw rods are respectively positioned at two sides of the movable roller, the screw threads on the left side and the right side of the outer wall of the screw rod along the axial direction of the screw rod are opposite in rotation direction, two screw sleeves are sleeved on the screw rods in a screw manner, and the screw sleeves are fixedly connected with the base;

the outer wall of the outer box body is fixedly provided with a motor, the output end of the motor is provided with a second worm, two second worm gears are arranged on the second worm in a meshed mode, and the two second worm gears are respectively connected with the two lead screws in a transmission mode.

Further, the device further comprises a buckling groove plate which is buckled on the outer sides of the motor, the second worm and the second worm wheel, and the buckling groove plate is fixed on the moving roller.

Compared with the prior art, the invention has the beneficial effects that: through adopting the mode of adjusting the distance between two movable rollers, realize adjusting lifting hook vertical movement position, can conveniently carry out accurate calculation and accuse to article lifting height position, thereby the accuracy of lifting by crane has been improved, simultaneously because only twine the individual layer hanging chain on the movable roller, the phenomenon that the hanging chain dislocation was tied off can effectively be avoided taking place, guarantee equipment normal operating, and the hanging chain transport position remains fixed throughout, thereby the convenience makes lifting hook and article keep vertical removal when lifting by crane, the phenomenon that the article that avoids the frequent change of hanging chain transport position to lead to rocked takes place, the stability of lifting by crane work is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the fluted plate of FIG. 1;

FIG. 3 is a schematic view of the internal structure of the outer case of FIG. 1;

FIG. 4 is an enlarged schematic view of the moving roller, the hoist chain and the hooks of FIG. 3;

FIG. 5 is an enlarged schematic view of the guide plate of FIG. 3;

FIG. 6 is an enlarged schematic top view of the moving roller of FIG. 4;

FIG. 7 is a schematic view of the internal structure of the movable roller of FIG. 6;

FIG. 8 is an enlarged schematic cross-sectional view of the fixing frame of FIG. 4;

fig. 9 is an enlarged schematic view of the ring gear of fig. 8;

the reference numerals in the drawings: 1. a moving roller; 2. a hanging chain; 3. a lifting hook; 4. the first U-shaped conveying wheel; 5. an outer case; 6. a rotating shaft; 7. a drive plate; 8. spur gears; 9. a linear tooth row; 10. a fixed frame; 11. a support shaft; 12. the second U-shaped conveying wheel; 13. a T-shaped frame; 14. a U-shaped clamping plate; 15. a rotating ring; 16. a leaf spring; 17. counter weight arc tooth row; 18. an inner gear ring; 19. a first worm; 20. a first worm wheel; 21. a base; 22. a guide plate; 23. a screw rod; 24. a screw sleeve; 25. a motor; 26. a second worm; 27. a second worm wheel; 28. and a buckle groove plate.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

In the description of the present invention, it should be noted that the directions or positional relationships indicated as being "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on the drawings are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, or may be internal communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. This example was written in a progressive manner.

As shown in fig. 1 to 4, the automatic hoisting electric hoist comprises two movable rollers 1, wherein a spiral wire conveying groove is formed in the outer wall of each movable roller 1, a hanging chain 2 is wound between the two movable rollers 1, the output end of the hanging chain 2 extends downwards, and a hanging hook 3 is arranged at the outer end of the hanging chain 2.

Specifically, the lifting hook 3 is used for hanging an external object, the length of the hanging chain 2 wound on the two movable rollers 1 can be adjusted by adjusting the distance between the two movable rollers 1, so that the height position of the lifting hook 3 is adjusted, and lifting work of the lifting hook 3 and objects on the lifting hook 3 is realized.

When in actual use, the hanging chain 2 is wound between the two movable rollers 1, and the vertical movement of the lifting hook 3 is realized mainly by adjusting the distance between the two movable rollers 1, so that a layer of cable is wound on the movable rollers 1 conveniently, the dislocation knotting phenomenon during cable conveying is avoided, the moving distance of the lifting hook 3 is determined by the number of turns of the hanging chain 2 wound on the two movable rollers 1 and the distance between the two movable rollers 1, the moving distance of the lifting hook 3 can be conveniently and accurately controlled, the phenomenon that the vertical movement position of the lifting hook 3 cannot be accurately controlled due to the fact that the winding number of the cable and the winding radius cannot be accurately calculated when a traditional structure is adopted is avoided, and the lifting force of an article can be fully dispersed by the multi-turn hanging chain 2 wound between the two movable rollers 1.

Through adopting the mode of adjusting the distance between two movable rollers 1, realize adjusting lifting hook 3 reciprocates the position, can conveniently carry out accurate calculation and handle the accuse to article lifting height position, thereby the accuracy of lifting by crane has been improved, simultaneously because only twine individual layer chain 2 on the movable roller 1, the phenomenon that chain 2 misplaced and knotted takes place can effectively be avoided, guarantee equipment normal operating, and chain 2 transport position remains fixed throughout, thereby the convenience makes lifting hook 3 and article keep vertical movement when lifting by crane, the phenomenon that chain 2 transport position frequently changes and the article that leads to takes place to rock, the stability of lifting by crane work is improved.

As shown in fig. 6, as a preferable example of the above embodiment, the spiral conveying groove on the moving roller 1 is internally rotated and embedded with a plurality of first U-shaped conveying wheels 4.

Specifically, through setting up first U type delivery wheel 4, can conveniently make the hanging chain 2 when moving roller 1 and sliding, hanging chain 2 drives first U type delivery wheel 4 and rotates to reduce hanging chain 2 and carry and to the friction damage of moving roller 1, conveniently protect moving roller 1 and hanging chain 2.

As shown in fig. 1, 5 and 7, as a preferable embodiment, the device further comprises an outer box 5, two moving rollers 1 are both positioned in the outer box 5, the inside of the moving roller 1 is hollow, a rotating shaft 6 is inserted in the middle of the moving roller 1, the rotating shaft 6 is in rotating connection with the moving roller 1, a plurality of transmission discs 7 are arranged on the outer wall of the rotating shaft 6 in the moving roller 1, one side of a first U-shaped conveying wheel 4 is positioned in a conveying groove, the other side of the first U-shaped conveying wheel 4 extends into the moving roller 1, and the transmission discs 7 are in transmission connection with the first U-shaped conveying wheel 4;

the two ends of the rotating shaft 6 are provided with straight gears 8, the straight gears 8 are provided with linear tooth rows 9 in a meshed manner, and the linear tooth rows 9 are fixed in the outer box body 5.

Specifically, when two movable rollers 1 relatively move, the movable rollers 1 keep a static moving state, at this time, the movable rollers 1 can drive the spur gears 8 to roll on the linear gear rows 9 through the rotating shafts 6, the spur gears 8 rotate, the spur gears 8 drive the transmission disc 7 to synchronously rotate through the rotating shafts 6, and the transmission disc 7 drives the first U-shaped conveying wheels 4 on the movable rollers 1 to rotate, so that when the distance between the two movable rollers 1 is adjusted, the first U-shaped conveying wheels 4 actively rotate, the first U-shaped conveying wheels 4 can conveniently assist in conveying the hanging chains 2, and the smoothness and stability of conveying the hanging chains 2 are improved.

As shown in fig. 4, as a preferred embodiment of the above, the hoist chain 2 on each of the moving rollers 1 is provided with one output end, both of which are simultaneously connected to the hooks 3.

Specifically, the middle section of the hanging chain 2 is fixed on the two moving rollers 1, two ends of the hanging chain 2 are wound between the two moving rollers 1, and two ends of the hanging chain 2 respectively extend downwards on the two moving rollers 1, when the two moving rollers 1 synchronously move, the two moving rollers 1 can drive two output ends of the hanging chain 2 to move up and down, so that the hanging hook 3 is driven to move up and down.

Through the hoist chain 2 that adopts this structure, can conveniently make lifting hook 3 atress balanced, the stationarity when improving lifting hook 3 and remove, and if adopt traditional setting up the gyro wheel on lifting hook 3, afterwards walk around the gyro wheel with the one end of hawser and fix on electric block shell, the mode of the other end winding on the roller, when the hawser lifts by crane, the hawser needs to drive the gyro wheel and rotates, because the frictional force effect between hawser, the gyro wheel, lifting hook 3 is when lifting by crane this moment, it can produce reciprocal slope swing, thereby the object takes place to rock easily when lifting by crane, the stationarity of heavy impact lifting operation, and the synchronous lifting hook 3's of two hoist chains 2 that the scheme adopted can effectively avoid lifting hook 3 and object's phenomenon of rocking, lifting by crane work's stationarity has been improved.

As shown in fig. 3 and 8, as a preferred embodiment, a fixed frame 10 is disposed at the bottom of the outer case 5, two supporting shafts 11 are rotatably disposed in the fixed frame 10, a second U-shaped conveying wheel 12 is disposed on the supporting shafts 11, a plurality of clamping ribs are disposed on the inner wall of the second U-shaped conveying wheel 12, penetrate through the fixed frame 10 and are lapped on the inner wall of the second U-shaped conveying wheel 12, and the clamping ribs on the second U-shaped conveying wheel 12 are inserted into the gaps of the links on the hanging chains 2.

Specifically, through setting up fixed frame 10, back shaft 11 and second U type delivery wheel 12, can conveniently fix the vertical transport position of hoist chain 2 to fix the lifting hook 3 reciprocates the position, through setting up the card arris on second U type delivery wheel 12, can conveniently make second U type delivery wheel 12 and hoist chain 2 synchronous motion, avoid friction damage.

As shown in fig. 8, as a preferable example of the above embodiment, a T-shaped frame 13 is provided on the inner wall of the fixed frame 10, two outer ends of the T-shaped frame 13 are provided with U-shaped clamping plates 14, and the U-shaped clamping plates 14 are fastened on the outer sides of the hanging chain 2 and the second U-shaped conveying wheel 12.

Specifically, through setting up U type cardboard 14, can conveniently carry out spacing shielding to the hoist chain 2 that carries on the second U type delivery wheel 12, avoid second U type delivery wheel 12 to take place to break away from with hoist chain 2, guarantee to carry steadily in the regulation position.

As shown in fig. 9, as a preferable example of the above embodiment, the outer side of the supporting shaft 11 is sleeved with a rotating ring 15, the inner wall of the rotating ring 15 is provided with a plurality of leaf springs 16, the leaf springs 16 are connected with the supporting shaft 11, so that the supporting shaft 11 and the rotating ring 15 are elastically connected through the leaf springs 16, the outer wall of the rotating ring 15 is provided with a counter-weight arc-shaped tooth row 17, the plurality of leaf springs 16 are gathered and the positions of the plurality of leaf springs 16 are opposite to the positions of the counter-weight arc-shaped tooth row 17, the outer side of the counter-weight arc-shaped tooth row 17 is sleeved with an inner gear ring 18, and the inner gear ring 18 is fixed on the inner wall of the fixed frame 10.

Specifically, when the plate spring 16 is in a natural state, the counter weight arc-shaped tooth row 17 is separated from the inner gear ring 18, when the second U-shaped conveying wheel 12 synchronously rotates along with the hanging chain 2, the second U-shaped conveying wheel 12 drives the plate spring 16, the rotating ring 15 and the counter weight arc-shaped tooth row 17 to synchronously rotate through the supporting shaft 11, the hanging chain 2 is stably conveyed at the moment, when the conveying speed of the hanging chain 2 is too high, the rotating ring 15 deflects towards one side of the counter weight arc-shaped tooth row 17 due to the inertia influence of the counter weight arc-shaped tooth row 17, the plate spring 16 is compressed and deformed at the moment, the counter weight arc-shaped tooth row 17 is clamped and clamped with each other towards the inner wall of the inner gear ring 18, at the moment, the inner gear ring 18 clamps the supporting shaft 11 through the counter weight arc-shaped tooth row 17 and the plurality of plate springs 16, and the second U-shaped conveying wheel 12 clamps the hanging chain 2 through the clamping edges and the U-shaped clamping plate 14, so that the hanging chain 3 and objects are locked, and the objects are prevented from being broken or causing the objects to naturally fall down due to the fact that the hanging chain 2 on the two moving rollers 1 are broken or damaged, and the safety is improved.

The teeth on the counter weight arc-shaped tooth row 17 and the teeth on the inner gear ring 18 are barb teeth, so that when the teeth on the counter weight arc-shaped tooth row 17 are contacted with the teeth on the inner gear ring 18, the teeth are naturally clamped with each other through inclined planes on the teeth, when common teeth are adopted, the inner gear ring 18 generates thrust to the counter weight arc-shaped tooth row 17 and leads to the leaf spring 16 to restore to a natural state, and the phenomenon that the inner gear ring 18 cannot effectively clamp the counter weight arc-shaped tooth row 17 is avoided.

As shown in fig. 8, as a preferable example of the above embodiment, the fixing frame 10 is rotatably provided with a first worm 19, the first worm 19 is provided with two first worm gears 20 in a meshed manner, and the first worm gears 20 are fixed on the support shaft 11.

Specifically, by arranging the first worm 19 and the first worm wheel 20, synchronous conveying of the two second U-shaped conveying wheels 12 and the hanging chains 2 on the two second U-shaped conveying wheels 12 can be ensured, so that stability of the hanging hook 3 and an object during lifting is improved.

As shown in fig. 2 to 5, as a preferred embodiment, both ends of the moving roller 1 are fixed with a base 21, the rotating shaft 6 passes through the base 21 and is rotatably connected, the base 21 is provided with a guide plate 22, the guide plate 22 slides relative to the base 21, and the guide plate 22 is fixed on the inner wall of the outer case 5;

the outer box body 5 is rotationally provided with two screw rods 23, the two screw rods 23 are respectively positioned at two sides of the moving roller 1, the screw threads on the left side and the right side of the outer wall of the screw rod 23 along the axial direction of the screw rod are opposite in rotation direction, the screw rod 23 is sleeved with two screw sleeves 24 in a screw manner, and the screw sleeves 24 are fixedly connected with the base 21;

the outer wall of the outer box body 5 is fixedly provided with a motor 25, the output end of the motor 25 is provided with a second worm 26, two second worm gears 27 are arranged on the second worm 26 in a meshed mode, and the two second worm gears 27 are respectively connected with the two lead screws 23 in a transmission mode.

Specifically, the motor 25 drives the two screw rods 23 to synchronously rotate through the second worm 26 and the two second worm gears 27, the screw rods 23 drive the two screw sleeves 24 on the screw rods to synchronously reversely rotate, and the screw sleeves 24 drive the base 21 to slide on the guide plate 22, so that the two moving rollers 1 are driven to synchronously reversely move.

As shown in fig. 1, as a preferable example of the above embodiment, a catching groove plate 28 is further included, the catching groove plate 28 is caught outside the motor 25, the second worm 26 and the second worm wheel 27, and the catching groove plate 28 is fixed to the moving roller 1.

Specifically, the buckling groove plate 28 can shield the motor 25, the second worm 26 and the second worm wheel 27, so that dust and impurities are prevented from falling on the motor 25, the second worm 26 and the second worm wheel 27 and affecting normal transmission of the dust and impurities.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.

Claims

1. An automatic hoisting electric hoist is characterized by comprising two movable rollers (1), wherein a spiral wire conveying groove is formed in the outer wall of each movable roller (1), a hanging chain (2) is wound between the two movable rollers (1), the output end of each hanging chain (2) extends downwards, and a lifting hook (3) is arranged at the outer end part of each hanging chain (2);

a plurality of first U-shaped conveying wheels (4) are rotationally embedded in the spiral conveying groove on the movable roller (1);

the automatic feeding device comprises a first U-shaped conveying wheel (4), a second U-shaped conveying wheel (4) and a rotary shaft (6), and is characterized by further comprising an outer box body (5), wherein the two movable rollers (1) are both positioned in the outer box body (5), the interior of the movable roller (1) is hollow, the rotary shaft (6) is inserted in the middle of the movable roller (1), the rotary shaft (6) is rotationally connected with the movable roller (1), a plurality of transmission discs (7) are arranged on the outer wall of the rotary shaft (6) in the movable roller (1), one side of the first U-shaped conveying wheel (4) is positioned in a wire conveying groove, and the other side of the first U-shaped conveying wheel (4) extends into the movable roller (1), and the transmission discs (7) are in transmission connection with the first U-shaped conveying wheel (4);

straight gears (8) are arranged at two ends of the rotating shaft (6), straight gear rows (9) are meshed with the straight gears (8), and the straight gear rows (9) are fixed in the outer box body (5);

the hanging chains (2) on each movable roller (1) are provided with an output end, and the two output ends are simultaneously connected with the hanging hooks (3).

2. An automatic hoisting electric hoist as claimed in claim 1, characterized in that a fixed frame (10) is arranged at the bottom of the outer box (5), two supporting shafts (11) are rotatably arranged in the fixed frame (10), a second U-shaped conveying wheel (12) is arranged on the supporting shafts (11), a plurality of clamping edges are arranged on the inner wall of the second U-shaped conveying wheel (12), penetrate through the fixed frame (10) and are lapped on the inner wall of the second U-shaped conveying wheel (12), and the clamping edges on the second U-shaped conveying wheel (12) are inserted into gaps of links on the hanging chain (2).

3. An automatic hoisting electric hoist as claimed in claim 2, characterized in that the inner wall of the fixed frame (10) is provided with a T-shaped frame (13), both outer ends of the T-shaped frame (13) are provided with U-shaped clamping plates (14), and the U-shaped clamping plates (14) are buckled on the outer sides of the hanging chain (2) and the second U-shaped conveying wheels (12).

4. An automatic hoisting electric hoist as claimed in claim 3, characterized in that the outer side of the support shaft (11) is sleeved with a rotating ring (15), a plurality of leaf springs (16) are arranged on the inner wall of the rotating ring (15), the leaf springs (16) are connected with the support shaft (11), the support shaft (11) and the rotating ring (15) are elastically connected through the leaf springs (16), a counterweight arc-shaped tooth row (17) is arranged on the outer wall of the rotating ring (15), the plurality of leaf springs (16) are gathered, the positions of the plurality of leaf springs (16) are opposite to the positions of the counterweight arc-shaped tooth row (17), an inner gear ring (18) is sleeved on the outer side of the counterweight arc-shaped tooth row (17), and the inner gear ring (18) is fixed on the inner wall of the fixed frame (10).

5. An automatic lifting electric block as claimed in claim 4, characterized in that the fixed frame (10) is rotatably provided with a first worm (19), the first worm (19) is provided with two first worm gears (20) in a meshed manner, and the first worm gears (20) are fixed on the support shaft (11).

6. An automatic hoisting electric hoist as claimed in claim 5, characterized in that the two ends of the moving roller (1) are both fixed with a base (21), the rotating shaft (6) passes through the base (21) and is rotationally connected, a guide plate (22) is arranged on the base (21), the guide plate (22) slides relative to the base (21), and the guide plate (22) is fixed on the inner wall of the outer box body (5);

two screw rods (23) are rotationally arranged in the outer box body (5), the two screw rods (23) are respectively positioned at two sides of the movable roller (1), the screw threads on the left side and the right side of the outer wall of the screw rod (23) along the axial direction of the screw rod are opposite in rotation direction, two screw sleeves (24) are sleeved on the screw rod (23), and the screw sleeves (24) are fixedly connected with the base (21);

the outer wall of the outer box body (5) is fixedly provided with a motor (25), the output end of the motor (25) is provided with a second worm (26), two second worm gears (27) are arranged on the second worm (26) in a meshed mode, and the two second worm gears (27) are respectively connected with the two lead screws (23) in a transmission mode.

7. An automated lifting electric hoist according to claim 6, further comprising a grooved plate (28), the grooved plate (28) being fastened to the outer sides of the motor (25), the second worm (26) and the second worm wheel (27), and the grooved plate (28) being fixed to the moving roller (1).