CN110304545B

CN110304545B - Lower-rotation electromagnetic bridge crane

Info

Publication number: CN110304545B
Application number: CN201910605095.2A
Authority: CN
Inventors: 乾红伦; 朱国瑞; 王明章; 付建阳; 赵建学; 张海忠
Original assignee: Henan Hengyuan Hengshan Industrial Co ltd
Current assignee: Henan Hengyuan Hengshan Industrial Co ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-10-02
Anticipated expiration: 2039-07-05
Also published as: CN110304545A

Abstract

The invention discloses a lower-rotation electromagnetic bridge crane which comprises a support column and a shell, wherein the inner side of the support column is provided with a cab, the outer side of a cross beam is provided with a side beam fixedly connected with the top end of the support column, a connecting column is integrally arranged below a walking trolley, a double-shaft motor is arranged inside the walking trolley, the bottom end of the connecting rod is connected with a walking wheel, the top of the walking trolley is provided with an installation hole, the inner side of an upper top shell is provided with a rotating mechanism, a fixing plate is connected below the installation hole, the bottom end of the rotating mechanism is connected with a support, the middle part of a scroll is fixedly provided with a partition plate, and the outer side of the top end of the. This lower rotatory electromagnetism bridge crane, the stability of the walking of being convenient for guarantee, the transmission of being convenient for is convenient for carry out electromagnet's position control, and the quick maintenance of being convenient for is favorable to guaranteeing overall structure stability, is favorable to the safety in production to use.

Description

Lower-rotation electromagnetic bridge crane

Technical Field

The invention relates to the technical field of electromagnetic bridge cranes, in particular to a lower-rotation electromagnetic bridge crane.

Background

The electromagnetic bridge crane is a device for transporting steel materials by utilizing electromagnets, and is called an electromagnetic crane, and the electromagnetic crane can generate strong magnetic field force, so that various iron wastes can be transported conveniently and rapidly, operations such as boxing and the like are not needed, and the production and processing time is greatly saved;

however, the electromagnetic bridge crane in the background of the prior art still has certain disadvantages when in use, such as:

1. the walking stability can not be ensured, the transmission is inconvenient, and the moving stability is not ensured;

2. the rotation adjustment below the travelling mechanism is inconvenient, and the position stability of the electromagnetic chuck is not ensured;

3. not convenient for carry out quick maintenance, be unfavorable for guaranteeing the stability of structure, be unfavorable for guaranteeing the safety in production.

Therefore, we propose a lower rotating electromagnetic bridge crane in order to solve the problems set forth above.

Disclosure of Invention

The invention aims to provide a lower-rotation electromagnetic bridge crane, and aims to solve the problems that the conventional electromagnetic bridge crane in the background art is inconvenient to ensure walking stability, drive, position adjustment of an electromagnetic chuck, quick overhaul, guarantee of the stability of the whole structure and safe production and use.

In order to achieve the purpose, the invention provides the following technical scheme: a lower-rotation electromagnetic bridge crane comprises a support column and a shell, wherein a cab is arranged on the inner side of the support column, a cross beam is fixedly connected to the top end of the support column, a side beam fixedly connected with the top end of the support column is arranged on the outer side of the cross beam, a walking trolley is arranged above the cross beam, a connection column is integrally arranged below the walking trolley, a pulley is rotatably arranged at the bottom of the walking trolley, a double-shaft motor is arranged inside the walking trolley, the output end of the double-shaft motor is connected with a driving shaft rod, the top end of the driving shaft rod is connected with a transmission belt, and a driven shaft rod positioned on the left side of the driving shaft rod is arranged;

a connecting wheel is mounted on the outer side of the driven shaft lever, a connecting rod is connected to the lower portion of the middle of the connecting wheel, a traveling wheel is connected to the bottom end of the connecting rod, an open slot located on the inner side of the connecting column is formed in the outer side of the traveling wheel, a mounting hole is formed in the top of the traveling trolley, and the traveling trolley is fixedly connected with the top cover through a bolt between the mounting hole and the top cover;

the utility model discloses a support, including spliced pole, shell, rotary mechanism, the middle part fixed mounting of spool has the baffle, and the outside of spool has coiled the rope to the bottom of rope is connected with electromagnetic chuck, the top outside of spool is fixed with the tooth piece, and the below of tooth piece is connected with branch, the end-to-end connection of branch has electric telescopic handle.

Preferably, the side beams are arranged on the front side and the rear side of the cross beam, the bottom ends of connecting columns fixedly arranged at the bottom ends of the walking trolleys penetrate through the space between the cross beam and the side beams, and the walking trolleys form a sliding structure above the side beams through pulleys.

Preferably, the driving shaft rod forms a transmission structure between the transmission belt and the driven shaft rod, the outer sides of the driving shaft rod and the driven shaft rod are provided with thread structures, and the screwing directions of the thread structures on the front side and the rear side of the driving shaft rod and the driven shaft rod are opposite.

Preferably, the driving shaft rod and the driven shaft rod are in linkage structures through thread structures on the outer sides of the driving shaft rod and the driven shaft rod and the connecting wheels, the connecting wheels and the walking wheels are arranged in a one-to-one correspondence mode, and the connecting wheels are in integrated structures through the connecting rods and the walking wheels.

Preferably, the rotating directions of the single bodies on the front side and the rear side of the walking wheel are opposite, the walking wheel is correspondingly meshed with the fixing groove, and the fixing groove is uniformly distributed on the inner side of the cross beam.

Preferably, the upper top shell is welded to the bottom end of the connecting column, the upper top shell is fixedly connected with the lower bottom shell through bolts, and the rotating mechanism is installed between the upper top shell and the lower bottom shell.

Preferably, the rotating mechanism comprises an intermediate rod, a transmission wheel and a driving motor, the transmission wheel is connected to the outer side of the intermediate rod and fixedly connected with the output end of the driving motor, and the intermediate rod is rotatably mounted at the bottom of the upper top shell.

Preferably, the middle rod is connected with the driving wheel in a meshing manner, the bottom of the middle rod is provided with mounting grooves positioned in the lower bottom shell at equal angles, and the bottom end face of the middle rod is provided with a chute in an annular structure.

Preferably, be the one-to-one setting between fixed plate and the mounting groove, and the top of fixed plate is embedded installs the top pearl to laminate mutually between the top face of top pearl and the spout.

Preferably, the top outside equidistance of spool is fixed with the tooth piece, and between the tooth piece monomer with the branch between the block connection to the connected mode between branch and the electric telescopic handle is articulated.

Compared with the prior art, the invention has the beneficial effects that: the lower-rotating electromagnetic bridge crane is convenient to ensure the walking stability, the transmission and the position adjustment of the electromagnetic chuck, the quick overhaul and the stability of the whole structure and the safe production and use;

1. the driving shaft rod is driven to rotate by the double-shaft motor, meanwhile, the driving shaft rod drives the driven shaft rod to rotate by the driving belt, so that 4 groups of connecting wheels are driven to synchronously rotate, and meanwhile, due to the fact that the thread directions of the two ends of the driving shaft rod and the two ends of the driven shaft rod are opposite, the connecting wheels and the travelling wheels on the front side and the rear side can reversely rotate conveniently, so that the travelling trolley can stably travel by means of the pulleys under the control of positive and negative rotation of the double-shaft motor;

2. the driving wheel is driven to rotate by the driving motor, so that the bracket is driven to rotate by the intermediate rod conveniently, position adjustment is facilitated, meanwhile, the top bead is convenient to attach to the sliding groove through the connection between the fixing plate and the mounting groove, the stability of rotation of the intermediate rod is convenient to guarantee, and further rotation adjustment is facilitated;

3. when rolling and unreeling are carried out through the spool, through the ratchet pawl mechanism that constitutes between tooth piece and the branch, be convenient for avoid the spool the gyration of spool when carrying out the rolling, simultaneously through electric telescopic handle's flexible, be convenient for control branch and remove, be convenient for guarantee structural stability, be favorable to guaranteeing safety in production.

Drawings

FIG. 1 is a front sectional view of the present invention;

FIG. 2 is a side sectional structure diagram of the walking trolley of the invention;

FIG. 3 is a front sectional structure diagram of the walking trolley of the invention;

FIG. 4 is a schematic view of a plane of depression sectioning structure of the walking trolley of the invention;

FIG. 5 is a front sectional view of the housing of the present invention;

FIG. 6 is a schematic view of a top view of the top case of the present invention;

FIG. 7 is a schematic top view of the bottom case of the present invention;

FIG. 8 is an enlarged view of portion A of FIG. 5 according to the present invention;

fig. 9 is a right side view schematically showing the structure of the reel according to the present invention.

In the figure: 1. a support pillar; 2. a cab; 3. a cross beam; 4. a side beam; 5. a walking trolley; 6. connecting columns; 7. a pulley; 8. a double-shaft motor; 9. an active shaft lever; 10. a transmission belt; 11. a driven shaft lever; 12. a connecting wheel; 13. a connecting rod; 14. a traveling wheel; 15. an open slot; 16. fixing grooves; 17. a top cover; 18. mounting holes; 19. a housing; 1901. an upper top shell; 1902. a lower bottom shell; 20. a rotation mechanism; 2001. an intermediate lever; 2002. a driving wheel; 2003. a drive motor; 21. a jack; 22. mounting grooves; 23. a fixing plate; 24. a top bead; 25. a chute; 26. a support; 27. a reel; 28. a partition plate; 29. a rope; 30. an electromagnetic chuck; 31. a tooth block; 32. a strut; 33. an electric telescopic rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-9, the present invention provides a technical solution: a lower-rotation electromagnetic bridge crane comprises a supporting column 1, a cab 2, a cross beam 3, side beams 4, a walking trolley 5, a connecting column 6, pulleys 7, a double-shaft motor 8, a driving shaft rod 9, a transmission belt 10, a driven shaft rod 11, a connecting wheel 12, a connecting rod 13, walking wheels 14, an open slot 15, a fixing slot 16, a top cover 17, a mounting hole 18, a shell 19, a rotating mechanism 20, a jack 21, a mounting slot 22, a fixing plate 23, a top bead 24, a sliding slot 25, a bracket 26, a scroll 27, a partition plate 28, a rope 29, an electromagnetic chuck 30, a tooth block 31, a supporting rod 32 and an electric telescopic rod 33, wherein the cab 2 is arranged on the inner side of the supporting column 1, the cross beam 3 is fixedly connected to the top end of the supporting column 1, the side beams 4 which are also fixedly connected to the top end of the supporting column 1 are arranged on the outer side of the cross beam, a pulley 7 is rotatably mounted at the bottom of the walking trolley 5, a double-shaft motor 8 is mounted inside the walking trolley 5, the output end of the double-shaft motor 8 is connected with a driving shaft rod 9, the top end of the driving shaft rod 9 is connected with a driving belt 10, and a driven shaft rod 11 positioned on the left side of the driving shaft rod 9 is arranged on the inner side of the driving belt 10;

a connecting wheel 12 is mounted on the outer side of the driven shaft rod 11, a connecting rod 13 is connected to the lower portion of the middle of the connecting wheel 12, a walking wheel 14 is connected to the bottom end of the connecting rod 13, an open slot 15 located on the inner side of the connecting column 6 is formed in the outer side of the walking wheel 14, a mounting hole 18 is formed in the top of the walking trolley 5, and the walking trolley 5 is fixedly connected with a top cover 17 through a bolt through the mounting hole 18;

the bottom at spliced pole 6 is connected to shell 19, and shell 19 includes last top shell 1901 and lower shell 1902, and the below of going up top shell 1901 is connected with lower shell 1902, rotary mechanism 20 is installed to the inboard of going up top shell 1901, and rotary mechanism 20's below is provided with jack 21 and the mounting groove 22 that is located the inside of lower shell 1902 respectively, the below of mounting groove 22 is connected with fixed plate 23, and the top of fixed plate 23 is provided with a pearl 24, rotary mechanism 20's bottom is connected with support 26, and spool 27 is installed to the below of support 26, the middle part fixed mounting of spool 27 has baffle 28, and the outside of spool 27 is coiled there is rope 29, and the bottom of rope 29 is connected with electromagnetic chuck 30, the top outside of spool 27 is fixed with tooth piece 31, and the below of tooth piece 31 is connected with branch 32, the end-to-end connection of branch 32 has electric telescopic handle.

As shown in fig. 1 and 2, the side beams 4 are respectively arranged at the front and rear sides of the cross beam 3, the bottom end of a connecting column 6 fixedly arranged at the bottom end of the walking trolley 5 penetrates between the cross beam 3 and the side beams 4, the walking trolley 5 forms a sliding structure above the side beams 4 through a pulley 7, the walking trolley 5 is convenient to slide, friction is convenient to reduce, as shown in fig. 2 and 4, a transmission structure is formed between a driving shaft rod 9 and a driven shaft rod 11 through a transmission belt 10, the outer sides of the driving shaft rod 9 and the driven shaft rod 11 are respectively provided with a threaded structure, the screwing directions of the threaded structures at the front and rear sides of the driving shaft rod 9 and the driven shaft rod 11 are opposite, transmission is convenient, the driving shaft rod 9 and the driven shaft rod 11 form a linkage structure with a connecting wheel 12 through the threaded structures at the outer sides, the connecting wheels 12 and the walking wheels 14 are arranged in a one-to-one correspondence, and the connecting, the walking wheels 14 are driven to rotate synchronously, as shown in fig. 3, the rotation directions of the single bodies on the front side and the rear side of the walking wheels 14 are opposite, the walking wheels 14 are correspondingly meshed with the fixing grooves 16, and the fixing grooves 16 are uniformly distributed on the inner side of the cross beam 3, so that the walking wheels are convenient to move.

As shown in fig. 1 and 5, the upper top housing 1901 is welded to the bottom end of the connecting column 6, and the upper top housing 1901 is fixedly connected to the lower bottom housing 1902 by bolts, and the rotating mechanism 20 is installed between the upper top housing 1901 and the lower bottom housing 1902, so as to facilitate the disassembly and assembly of the housing 19, as shown in fig. 6, the rotation mechanism 20 includes an intermediate lever 2001, a transmission wheel 2002 and a drive motor 2003, and the transmission wheel 2002 is connected to the outer side of the intermediate lever 2001, the transmission wheel 2002 is fixedly connected with the output end of the driving motor 2003, the middle rod 2001 is rotatably arranged at the bottom of the upper top shell 1901, the middle rod 2001 is conveniently driven to rotate, the connection mode between the middle rod 2001 and the transmission wheel 2002 is meshing connection, and the bottom of the middle rod 2001 is provided with mounting grooves 22 at equal angles inside the lower chassis 1902, and the bottom end surface of the intermediate rod 2001 is provided with a sliding groove 25 having a ring structure, so that the intermediate rod 2001 is stably installed between the upper top housing 1901 and the lower bottom housing 1902.

As shown in fig. 5 and 8, the fixing plates 23 are disposed in one-to-one correspondence with the mounting grooves 22, the top ends of the fixing plates 23 are provided with the top beads 24 in an embedded manner, and the top end surfaces of the top beads 24 are attached to the sliding grooves 25, so that the middle rod 2001 is conveniently supported, and the rotational stability of the middle rod 2001 is conveniently ensured.

As shown in the figures 1 and 9, the tooth blocks 31 are fixed on the top outer sides of the winding shafts 27 at equal angles, the tooth blocks 31 are connected with the supporting rods 32 in a clamping mode, and the supporting rods 32 are connected with the electric telescopic rods 33 in a hinged mode, so that the tooth blocks 31 are conveniently clamped, a ratchet-pawl mechanism is conveniently formed, and the structural stability is conveniently ensured.

The working principle is as follows: when the lower rotary electromagnetic bridge crane is used, firstly, the crane is installed, for example, the crane enters the interior of the cab 2 through the stairs below the cab 2 in fig. 1 to perform crane operation, when the position of the electromagnetic chuck 30 is moved, for example, the double-shaft motor 8 located in the interior of the traveling trolley 5 is started in fig. 2, so that the double-shaft motor 8 drives the driving shaft rod 9 to rotate, the driven shaft rod 11 is driven to rotate synchronously through the driving belt 10 in fig. 3, and further, the connecting wheel 12 is driven to rotate synchronously through the worm and gear mechanism formed between the driving shaft rod 9 and the driven shaft rod 11 and the connecting wheel 12 respectively, because the thread directions of the top end and the tail end of the driving shaft rod 9 and the driving belt 10 are opposite, the connecting wheels 12 on the front side and the rear side are rotated reversely, so that the connecting wheel 12 drives the traveling wheel 14 to rotate on the inner side of the open slot 15 through the connecting rod 13, so that the travelling wheels 14 on the front side and the rear side rotate reversely, and the travelling trolley 5 is driven to travel above the cross beam 3 through the engagement between the travelling wheels 14 and the fixed groove 16, so that the travelling trolley 5 is controlled to move left and right by controlling the forward and reverse rotation of the double-shaft motor 8;

after the position of the traveling trolley 5 is adjusted, the driving motor 2003 in fig. 1 and 5 is started, so that the driving motor 2003 drives the driving wheel 2002 to rotate as in fig. 6, and further drives the middle rod 2001 to rotate, so that the middle rod 2001 drives the bracket 26 to rotate, and the angle position is adjusted, meanwhile, as in fig. 8, the rotation stability of the middle rod 2001 is ensured through the clamping between the top bead 24 and the sliding groove 25, and the top bead 24 is embedded into the top of the fixing plate 23 and is fixed through the bolt between the lower bottom shell 1902 and the fixing plate 23, so that the assembly and disassembly are facilitated;

after the angle position of the bracket 26 is adjusted, as shown in fig. 1, the reel 27 is used for unreeling the rope 29, so that the electromagnetic chuck 30 is lowered for use, meanwhile, 2 groups of partition boards 28 are conveniently separated through the rope 29, so that the electromagnetic chuck can be used simultaneously, and meanwhile, when the rope is unreeled, the reel 27 rotates clockwise as shown in fig. 9, at this time, the electric telescopic rod 33 retracts, so that the support rod 32 rotates, so that the top end of the support rod 32 is disengaged from the tooth block 31, so that the reel 27 is reversed, when the rope is reeled, the reel 27 rotates counterclockwise, at this time, the electric telescopic rod 33 extends to enable the support rod 32 to rotate and engage with the tooth block 31, so that the reel 27 can be prevented from rotating clockwise, and the safety and stability of hoisting operation can be;

in addition, when a fault occurs, the travelling trolley 5 and the top cover 17 are conveniently disassembled and assembled through bolt fixing, bolt fixing between the upper top shell 1901 and the lower bottom shell 1902 and the like, so that timely and quick overhaul is facilitated, namely the whole working process of the lower rotary electromagnetic bridge crane, and the content which is not described in detail in the specification belongs to the prior art which is well known to those skilled in the art.

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. A lower rotary electromagnetic bridge crane, comprising a support column (1) and a housing (19), characterized in that: a cab (2) is arranged on the inner side of the supporting column (1), a cross beam (3) is fixedly connected to the top end of the supporting column (1), a side beam (4) which is also fixedly connected to the top end of the supporting column (1) is arranged on the outer side of the cross beam (3), a walking trolley (5) is mounted above the cross beam (3), a connecting column (6) is integrally arranged below the walking trolley (5), a pulley (7) is rotatably mounted at the bottom of the walking trolley (5), a double-shaft motor (8) is mounted inside the walking trolley (5), the output end of the double-shaft motor (8) is connected with a driving shaft lever (9), the top end of the driving shaft lever (9) is connected with a driving belt (10), and a driven shaft lever (11) located on the left side of the driving shaft lever (9) is arranged on;

a connecting wheel (12) is mounted on the outer side of the driven shaft lever (11), a connecting rod (13) is connected to the lower portion of the middle of the connecting wheel (12), a traveling wheel (14) is connected to the bottom end of the connecting rod (13), an open slot (15) located on the inner side of the connecting column (6) is formed in the outer side of the traveling wheel (14), a mounting hole (18) is formed in the top of the traveling trolley (5), and the traveling trolley (5) is fixedly connected with a top cover (17) through a bolt through the mounting hole (18);

the outer shell (19) is connected to the bottom end of the connecting column (6), the outer shell (19) comprises an upper top shell (1901) and a lower bottom shell (1902), the lower portion of the upper top shell (1901) is connected with the lower bottom shell (1902), a rotating mechanism (20) is installed on the inner side of the upper top shell (1901), a jack (21) and a mounting groove (22) which are located inside the lower bottom shell (1902) are respectively arranged below the rotating mechanism (20), a fixing plate (23) is connected below the mounting groove (22), a top bead (24) is arranged at the top end of the fixing plate (23), a support (26) is connected to the bottom end of the rotating mechanism (20), a scroll (27) is installed below the support (26), a partition plate (28) is fixedly installed in the middle of the scroll (27), a rope (29) is coiled on the outer side of the scroll (27), and an electromagnetic sucker (30) is connected to the bottom end of the, a tooth block (31) is fixed on the outer side of the top end of the winding shaft (27), a support rod (32) is connected below the tooth block (31), and the tail end of the support rod (32) is connected with an electric telescopic rod (33);

the rotating mechanism (20) comprises an intermediate rod (2001), a transmission wheel (2002) and a driving motor (2003), the transmission wheel (2002) is connected to the outer side of the intermediate rod (2001), the transmission wheel (2002) is fixedly connected with the output end of the driving motor (2003), and the intermediate rod (2001) is rotatably mounted at the bottom of the upper top shell (1901);

the middle rod (2001) is connected with the transmission wheel (2002) in a meshing mode, the bottom of the middle rod (2001) is provided with an installation groove (22) which is positioned in the lower bottom shell (1902) at an equal angle, and the bottom end face of the middle rod (2001) is provided with a sliding groove (25) which is of an annular structure.

2. A lower rotary electromagnetic bridge crane as claimed in claim 1, wherein: the side beams (4) are arranged on the front side and the rear side of the cross beam (3), the bottom ends of connecting columns (6) fixedly arranged at the bottom end of the walking trolley (5) penetrate between the cross beam (3) and the side beams (4), and the walking trolley (5) forms a sliding structure above the side beams (4) through pulleys (7).

3. A lower rotary electromagnetic bridge crane as claimed in claim 1, wherein: the driving shaft lever (9) forms a transmission structure between the driving belt (10) and the driven shaft lever (11), the outer sides of the driving shaft lever (9) and the driven shaft lever (11) are provided with thread structures, and the screwing directions of the thread structures on the front side and the rear side of the driving shaft lever (9) and the driven shaft lever (11) are opposite.

4. A lower rotary electromagnetic bridge crane as claimed in claim 1, wherein: the driving shaft rod (9) and the driven shaft rod (11) form a linkage structure through a thread-shaped structure on the outer side of the driving shaft rod and the connecting wheels (12), the connecting wheels (12) and the walking wheels (14) are arranged in a one-to-one correspondence mode, and the connecting wheels (12) form an integrated structure through connecting rods (13) and the walking wheels (14).

5. A lower rotary electromagnetic bridge crane as claimed in claim 1, wherein: the rotating directions of the single bodies on the front side and the rear side of the walking wheels (14) are opposite, the walking wheels (14) are correspondingly meshed with the fixing grooves (16), and the fixing grooves (16) are uniformly distributed on the inner side of the cross beam (3).

6. A lower rotary electromagnetic bridge crane as claimed in claim 1, wherein: the bottom ends of the upper top shell (1901) and the connecting column (6) are connected in a welding mode, the upper top shell (1901) and the lower bottom shell (1902) are connected in a bolt fixed mode, and the rotating mechanism (20) is installed between the upper top shell (1901) and the lower bottom shell (1902).

7. A lower rotary electromagnetic bridge crane as claimed in claim 1, wherein: be the one-to-one setting between fixed plate (23) and mounting groove (22), and the top of fixed plate (23) is embedded installation and pushes up pearl (24) to laminate mutually between the top terminal surface of pushing up pearl (24) and spout (25).

8. A lower rotary electromagnetic bridge crane as claimed in claim 1, wherein: tooth blocks (31) are fixed on the outer side of the top of the reel (27) at equal angles, the tooth blocks (31) are connected with the support rods (32) in a clamping mode, and the support rods (32) are connected with the electric telescopic rod (33) in a hinged mode.