CN115784074A - Multistage material lifting equipment with safe self-locking function - Google Patents

Abstract

The invention discloses a multi-stage material lifting device with a safety self-locking function, and relates to the technical field of lifting devices. According to the invention, through the matching use of the positioning plate, the positioning groove, the connecting rope and the first spring, when a user drives the jigger to ascend by opening the driving drum, when the first-stage expansion bracket drives the positioning groove to be at the same horizontal height as the positioning plate, the first spring drives the first sliding plate and the positioning plate to rebound, so that the positioning plate can enter the positioning groove, the self-locking of the first-stage expansion bracket is completed through the positioning plate, the pressure on a steel wire rope can be reduced, the safety of equipment is improved, and meanwhile, the safety of the equipment can be ensured through the self-locking of the positioning plate.

Description

Multistage material lifting equipment with safe self-locking function

Technical Field

The invention relates to the technical field of lifting equipment, in particular to a multi-stage material lifting equipment with a safety self-locking function.

Background

Material lifting equipment refers to a fixing device's mechanical conveyor, equipment can pass through the pneumatic cylinder, the lifting of multiple drive modes such as wire rope is accomplished to the material is carried, this type of device can the multiple material of lifting in the in-process of using, it is little to the requirement of material, the lifting function to the material is realized to the connection between some equipment isomorphic wire rope and the pulley, the cooperation through the assembly pulley is used and can be reduced the required lift of lifting of equipment, use through the cooperation between a plurality of assembly pulleys simultaneously and can carry out the lifting to the multi-stage support, thereby make equipment can accomplish multistage lifting, and then conveniently with material lifting to higher department, thereby conveniently transport the material.

However, when the existing equipment lifts materials by using a steel wire rope through a driving device, after a material vehicle reaches a fixed point, the weight of the telescopic frame and the weight of the materials are all accumulated at the steel wire rope at the bottom, the service life of the steel wire rope is easily influenced by long-term high pressure, and even the steel wire rope is broken seriously, so that the equipment has certain danger, and meanwhile, the equipment is not beneficial to long-term use.

Disclosure of Invention

The invention aims to provide a multi-stage material lifting device with a safety self-locking function, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a multistage material lifting equipment with safe self-locking function, includes the mounting bracket, the one-level expansion bracket is located inside the mounting bracket, the second grade expansion bracket is located inside the one-level expansion bracket, the jigger is located inside the second grade expansion bracket, the drive reel, fixed connection in the mounting bracket top, just the drive reel outer wall is equipped with wire rope, just wire rope and one-level expansion bracket, second grade expansion bracket, jigger looks adaptation, two first mounting grooves, two have been seted up to the inside symmetry of mounting bracket the inside locating plate that all is equipped with of first mounting groove, the first slide of locating plate one end fixedly connected with, two constant head tanks with locating plate looks adaptation are seted up to one-level expansion bracket surface symmetry, mounting bracket outer wall fixedly connected with installation piece, the inside second mounting groove of having seted up of installation piece, installation piece outer wall fixedly connected with motor, the inside rotation of second mounting groove is connected with ball screw, motor output and ball screw fixed connection, ball screw outside symmetry is equipped with the screw-nut slide of two looks adaptations, first slide one end fixedly connected with connects the rope.

Further, the inside first spout of offering with first slide looks adaptation of mounting bracket, first slide is through first spout and mounting bracket sliding connection, the locating plate uses through the cooperation of first slide and first spout through first slide and first spout sliding connection, can guarantee the stability of locating plate when the locating plate removes.

Further, connect the rope other end and screw-nut slide fixed connection, two spacing rings of installation piece top symmetry fixedly connected with, the spacing ring cover is located and is connected the rope outside, can carry on spacingly to connecting the rope through the spacing ring to prevent to connect the rope and float everywhere.

Furthermore, the one end that first slide was kept away from to the locating plate is seted up flutedly, the inside gyro wheel that is connected with that rotates of recess, gyro wheel one end extends to the recess outside, can reduce the friction between locating plate and the one-level expansion bracket through the gyro wheel, and then makes things convenient for the one-level expansion bracket to remove.

Further, the one end fixedly connected with first spring, two of locating plate is kept away from to first slide the first fixed block of the inside equal fixedly connected with of first mounting groove, first logical groove has been seted up to first fixed block inside, the first spring other end and first fixed block fixed connection, connect the rope and run through in first logical groove, when locating plate and constant head tank removed to same level, first spring kick-backed this moment can drive the locating plate and get into inside the constant head tank to be convenient for accomplish the self-locking function of equipment.

Further, two second through grooves, two have been seted up to mounting bracket both ends symmetry the second through inslot portion all rotates and is connected with the supporting wheel, the connecting rope is located the supporting wheel top, can reduce the friction between connecting rope and the mounting bracket through the supporting wheel to can prolong the life of connecting the rope.

Furthermore, the outside symmetry of ball screw is equipped with two opposite direction's screw, two spacing grooves have been seted up to installation piece top symmetry, the screw-nut slide passes through spacing groove and installation piece sliding connection, the screw-nut slide top extends to the installation piece outside, can guarantee the stability when screw-nut slide removes through the spacing groove.

Further, a plurality of third mounting grooves have been seted up to the inside symmetry equidistance of one-level expansion bracket, and are a plurality of the inside gasbag that all is equipped with of third mounting groove, the first extrusion head of gasbag one end fixedly connected with, the one end shape that the gasbag was kept away from to first extrusion head is the arc, one-level expansion bracket bottom is equipped with the second extrusion head of looks adaptation, second extrusion head shape is the arc, when the first extrusion head of second extrusion, can drive curved first extrusion head through curved second extrusion head and remove to can prevent that first extrusion head from influencing the removal of one-level expansion bracket.

Further, two first sliders of first extrusion head outer wall symmetry fixedly connected with, the inside second spout of seting up with first slider looks adaptation of mounting bracket, first extrusion head is through first slider and second spout sliding connection, and is a plurality of the inside equal fixedly connected with second fixed block of third mounting groove, the gasbag other end and second fixed block fixed connection, the breather pipe that fixed block one end fixedly connected with and gasbag are linked together uses the stability that can guarantee the gasbag and remove through the cooperation of first slider and second spout.

Further, the inside fixedly connected with second spring of second spout, the second spring other end and first slider fixed connection, when first expansion bracket, second expansion bracket or jigger removed to the top, the second spring can drive first extrusion head through kick-backing and reset this moment to make first extrusion head can slow down its speed when removing downwards again through the cooperation use with gasbag, communicating pipe, thereby can improve equipment press the security.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, through the matching use of the positioning plate, the positioning groove, the connecting rope and the first spring, when a user drives the jigger to ascend by opening the driving drum, when the first-stage expansion bracket drives the positioning groove to be at the same horizontal height as the positioning plate, the first spring drives the first sliding plate and the positioning plate to rebound, so that the positioning plate can enter the positioning groove, and the self-locking of the first-stage expansion bracket is completed through the positioning plate, so that the pressure on a steel wire rope can be reduced, and the safety of equipment is improved.

2. According to the invention, through the matching use of the air bag, the first extrusion head, the second extrusion head and the second spring, when a steel wire rope is broken to cause the primary expansion bracket, the secondary expansion bracket or the jigger to fall off, the second extrusion head arranged at the bottom of the first extrusion head can quickly impact on the surface of the first extrusion head, the internal pressure of the air bag is instantly increased, the air bag is instantly hardened, so that the first extrusion head is instantly difficult to enter the third installation groove, the first extrusion head can slow down the descending speed of the second extrusion head and the primary expansion bracket through the first extrusion head, when the descending speed of the primary expansion bracket is reduced, the impact applied by the first extrusion head to the air bag is reduced, the internal pressure of the air bag is reduced, the air bag can eject internal gas to deform, so that the first extrusion head can be accommodated into the third installation groove, then the downward falling speed of the second extrusion head and the primary expansion bracket can be sequentially slowed down through the plurality of first extrusion heads at the bottom, and the falling speed of the primary expansion bracket is finally reduced, and the falling speed of the primary expansion bracket is further improved in safety of equipment.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall appearance structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the positioning plate and positioning groove connection according to the present invention;

FIG. 3 is a schematic cross-sectional view of the primary telescoping frame of the present invention when not in operation;

FIG. 4 is an enlarged view of the structure at A in FIG. 2;

FIG. 5 is an enlarged view of the structure at B in FIG. 3;

FIG. 6 is a schematic view of the appearance of the wire rope connection of the present invention;

FIG. 7 is a schematic diagram of the simple explosion of the present invention with the wire rope drive connection;

fig. 8 is an enlarged view of the structure at C of fig. 3.

In the figure: 1. a mounting frame; 2. a primary expansion bracket; 3. a secondary telescopic frame; 4. a jigger; 5. driving the winding drum; 6. a wire rope; 7. a first mounting groove; 8. positioning a plate; 9. a first slide plate; 10. positioning a groove; 11. mounting blocks; 12. a second mounting groove; 13. a motor; 14. a ball screw; 15. a feed screw nut sliding plate; 16. connecting ropes; 17. a first chute; 18. a limiting ring; 19. a groove; 20. a roller; 21. a first spring; 22. a first fixed block; 23. a first through groove; 24. a second through groove; 25. a support wheel; 26. a limiting groove; 27. a third mounting groove; 28. an air bag; 29. a first extrusion head; 30. a second extrusion head; 31. a first slider; 32. a second chute; 33. a second fixed block; 34. a breather pipe; 35. a second spring.

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 to 7, the present invention provides a technical solution: a multi-stage material lifting device with a safe self-locking function comprises a mounting frame 1, a first-stage expansion bracket 2, a second-stage expansion bracket 3, a jigger 4, a driving reel 5 and a first spring 21, wherein the first-stage expansion bracket 2 is arranged inside the mounting frame 1, the second-stage expansion bracket 3 is arranged inside the first-stage expansion bracket 2, the jigger 4 is arranged inside the second-stage expansion bracket 3, the driving reel 5 is fixedly connected to the top of the mounting frame 1, the outer wall of the driving reel 5 is provided with a steel wire rope 6, the steel wire rope 6 is matched with the first-stage expansion bracket 2, the second-stage expansion bracket 3 and the jigger 4, two first mounting grooves 7 are symmetrically formed inside the mounting frame 1, a positioning plate 8 is arranged inside each first mounting groove 7, one end of the positioning plate 8, which is far away from a first sliding plate 9, the inside the groove 19 is rotatably connected with the roller 20, one end of the roller 20 extends to the outside the groove 19, one end of the positioning plate 8 is fixedly connected with a first sliding plate 9, one end of the first spring 21, which is far away from the positioning plate 8, is fixedly connected with the first spring, the interior of each of the two first mounting grooves 7 is fixedly connected with a first fixing block 22, a first through groove 23 is formed in the interior of each first fixing block 22, the other end of each first spring 21 is fixedly connected with the first fixing block 22, a connecting rope 16 penetrates through the first through groove 23, two positioning grooves 10 matched with the positioning plates 8 are symmetrically formed in the surface of the primary expansion bracket 2, a mounting block 11 is fixedly connected with the outer wall of the mounting bracket 1, a second mounting groove 12 is formed in the interior of the mounting block 11, a motor 13 is fixedly connected with the outer wall of the mounting block 11, a ball screw 14 is rotatably connected in the interior of the second mounting groove 12, two threads in opposite directions are symmetrically arranged on the exterior of the ball screw 14, two limiting grooves 26 are symmetrically formed in the top of the mounting block 11, the screw nut sliding plate 15 is slidably connected with the mounting block 11 through the limiting grooves 26, and the top of the screw nut sliding plate 15 extends to the exterior of the mounting block 11, output end and 14 fixed connection of ball screw 13, 14 outside symmetries of ball screw are equipped with the screw-nut slide 15 of two looks adaptations, 9 one end fixedly connected with of first slide connect rope 16, connect 16 other ends of rope and 15 fixed connection of screw-nut slide, 11 top symmetry fixedly connected with of installation piece two spacing rings 18, spacing ring 18 covers locates to connect 16 outsides of rope, 1 inside first spout 17 of seting up with first slide 9 looks adaptations of mounting bracket, first slide 9 is through first spout 17 and 1 sliding connection of mounting bracket, locating plate 8 is through first slide 9 and 17 sliding connection of first spout, two second through-grooves 24 have been seted up to 1 both ends symmetry of mounting bracket, two inside all rotations in through-groove 24 of second are connected with supporting wheel 25, it is located supporting wheel 25 tops to connect rope 16.

The implementation mode specifically comprises the following steps: the adaptive pulley blocks are arranged between the mounting frame 1 and the first-stage expansion bracket 2, the adaptive pulley blocks are arranged between the first-stage expansion bracket 2 and the second-stage expansion bracket 3, the adaptive pulley blocks are arranged between the second-stage expansion bracket 3 and the jigger 4, when a user needs to transport materials in the jigger 4 to the top, the user opens the driving reel 5 to rotate clockwise, the steel wire rope 6 is wound in the driving reel 5, the first-stage expansion bracket 2 extends upwards, the second steel wire rope 6 between the mounting frame 1 and the first-stage expansion bracket 2 drives the second-stage expansion bracket 3 to move upwards, the third steel wire rope 6 between the first-stage expansion bracket 2 and the second-stage expansion bracket 3 drives the jigger 4 to move upwards, the fourth steel wire rope 6 between the jigger 4 and the driving reel 5 is unreeled, and when the driving reel 5 rotates anticlockwise, the steel wire ropes 6 move in the opposite direction, thereby accomplish the lifting and descending of jigger 4, when the process that the one-level expansion bracket 2 is ascending, when the equipment is not working, at this moment, locating plate 8 and gyro wheel 20 receive the extrusion of one-level expansion bracket 2 and accomodate in the inside of first mounting groove 7, at this moment first spring 21 is the shrink state, when the one-level expansion bracket 2 upwards moves the in-process, when one-level expansion bracket 2 drives constant head tank 10 to be in same level with locating plate 8, first spring 21 rebounds and drives first slide 9 to move at this moment, then first slide 9 slides through first spout 17, first slide 9 drives locating plate 8 and gets into the inside of constant head tank 10 simultaneously, thereby can accomplish the connection with constant head tank 10 through locating plate 8, thereby make the equipment can accomplish the auto-lock to one-level expansion bracket 2 through locating plate 8, thereby improve the security of equipment, meanwhile, the pressure born by the steel wire rope 6 can be reduced, the friction between the one-level expansion bracket 2 and the positioning plate 8 can be reduced through the roller 20, thereby facilitating the movement of the one-level expansion bracket 2, after a user takes out materials inside the jigger 4, the user needs to reset the one-level expansion bracket 2 at the moment, the user opens the motor 13 to drive the ball screw 14 to rotate at the moment, along with the rotation of the ball screw 14, the ball screw 14 can simultaneously drive the two screw nut sliding plates 15 to approach to the center of the ball screw 14 through external opposite threads, the stability of the screw nut sliding plates 15 during movement can be ensured through the limiting grooves 26, then the screw nut sliding plates 15 can drive the connecting rope 16 to move, at the moment, the connecting rope 16 can pull the first sliding plate 9 to move, the positioning plate 8 can be pulled out from the inside of the positioning groove 10 by the first sliding plate 9 during the movement, thereby enabling the positioning plate 8 not to limit the position of the one-level expansion bracket 2 any more, and enabling the connecting rope 16 to be pulled out from the positioning groove 10 during the movement of the positioning groove 14, thereby facilitating the replacement of the ball screw nut sliding plate 4 when the jigger 4 and the user can open the second-level expansion bracket 4, thereby facilitating the replacement of the jigger for the second-stage telescopic bracket for the second-stage telescopic carriage 4, and the replacement of the user, thereby prolonging the user.

Referring to fig. 2, fig. 3 and fig. 8, the present invention provides a technical solution: the utility model provides a multistage material lifting equipment with safe self-locking function, a plurality of third mounting grooves 27 have been seted up to 2 inside symmetry equidistance of one-level expansion bracket in addition, a plurality of third mounting grooves 27 are inside all to be equipped with gasbag 28, the first extrusion head 29 of gasbag 28 one end fixedly connected with, the one end shape that gasbag 28 was kept away from to first extrusion head 29 is the arc, 2 bottoms of one-level expansion bracket are equipped with the second extrusion head 30 of looks adaptation, second extrusion head 30 shape is the arc, two first sliders 31 of first extrusion head 29 outer wall symmetry fixedly connected with, the inside second spout 32 of seting up with first slider 31 looks adaptation of mounting bracket 1, first extrusion head 29 is through first slider 31 and second spout 32 sliding connection, the inside equal fixedly connected with second fixed block 33 of a plurality of third mounting grooves 27, gasbag 28 other end and second fixed block 33 fixed connection, fixed block one end fixedly connected with the breather pipe 34 that is linked together with gasbag 28, the inside fixedly connected with second spring 35 of second spout 32, the second spring 35 other end and first slider 31 fixed connection.

The implementation mode specifically comprises the following steps: the first installation groove 7 and the third installation groove 27 are not on the same vertical horizontal line, the whole weight of the equipment is almost borne at the top of the steel wire rope 6, when the steel wire rope 6 is suddenly broken in the moving process, the highest object suddenly drops at the moment, so that great impact can be caused on the equipment, the service life of the equipment is further influenced, the same structures are arranged inside the installation frame 1, the first-stage expansion frame 2 and the second-stage expansion frame 3, when the steel wire rope 6 connected to the outside of the first-stage expansion frame 2 is suddenly broken, the first-stage expansion frame 2 quickly drops at the moment, the second extrusion head 30 at the bottom of the first extrusion head 30 collides with the first extrusion heads 29 at two ends, the bottom of the second extrusion head 30 and the top of the first extrusion head 29 are in matched arc shapes, the second extrusion head 30 collides with the first extrusion head 29 to drive the first extrusion head 29 to move, the first extrusion head 29 collides with the air bag 28 in the quick moving process, after the air bag 28 is impacted, the pressure inside the air bag 28 is instantly increased at the moment, so that the air bag 28 generates huge reverse thrust, so that the first extrusion head 29 is difficult to move instantly, when the descending speed of the first-stage expansion bracket 2 is reduced, the first-stage expansion bracket 2 extrudes the first extrusion head 29 through the second extrusion head 30 at the bottom, the bottoms of the second-stage expansion bracket 3 and the jigger 4 are both provided with the same arc-shaped blocks, at the moment, the first extrusion head 29 moves along the second chute 32 through the first sliding block 31, meanwhile, the first extrusion head 29 extrudes the air bag 28 in the moving process, at the moment, the air bag 28 conveys the internal air to the outside through the vent pipe 34, at the moment, the air bag 28 slowly shrinks, so that the first extrusion head 29 can be accommodated into the inside of the third installation groove 27, and further, the second extrusion head 30 and the first-stage expansion bracket 2 can continuously fall downwards, then can slow down the speed that second extrusion head 30 and one-level expansion bracket 2 fall downwards in proper order through a plurality of first extrusion heads 29 of bottom, reduce the speed when one-level expansion bracket 2 falls to the ground at last, and then reduce its impact injury that causes equipment, and then improve equipment's security, after the equipment maintenance finishes, when one-level expansion bracket 2 drives second extrusion head 30 and removes to first extrusion head 29 top, second spring 35 can drive first extrusion head 29 through kick-back and reset this moment, first extrusion head 29 can drive gasbag 28 and enlarge simultaneously, thereby make gasbag 28 inflate once more through breather pipe 34 and enlarge, and then make first extrusion head 29 protect equipment once more, and then improve equipment's security.

The working principle of the invention is as follows:

referring to fig. 1-7, through locating plate 8, locating slot 10, the cooperation of connecting rope 16 and first spring 21 is used, when the user drives jigger 4 to go up through opening drive reel 5, when one-level expansion bracket 2 drives locating slot 10 and locating plate 8 are in same level, first spring 21 drives first slide 9 and locating plate 8 to kick-back this moment, thereby make locating plate 8 can get into the inside of locating slot 10, thereby accomplish the auto-lock to one-level expansion bracket 2 through locating plate 8, thereby can reduce the pressure that wire rope 6 received, and then improve equipment's security, when the user needs to reduce jigger 4, the user can drive ball screw 14 rotatory through opening motor 13, then can stimulate through the removal of screw-nut slide 15 and connect rope 16 and drive first slide 9 and remove, can drive locating plate 8 through the removal of first slide 9 and reset, thereby convenience of user adjusts the height of jigger 4 through opening drive reel 5, and then convenience of user adjusts the height of jigger 4, simultaneously can also guarantee equipment's security through the auto-lock of locating plate 8.

Further, referring to fig. 2, fig. 3 and fig. 8 of the specification, by using the air bag 28, the first extrusion head 29, the second extrusion head 30 and the second spring 35 in cooperation, when the first-stage expansion bracket 2, the second-stage expansion bracket 3 or the small pulley 4 drops due to the fracture of the steel wire rope 6, at this time, the second extrusion head 30 arranged at the bottom of the first extrusion head can quickly impact on the surface of the first extrusion head 29, at this time, the internal pressure of the air bag 28 instantaneously increases, at this time, the air bag 28 instantaneously hardens, so that the first extrusion head 29 cannot enter the third installation groove 27 instantaneously, at this time, the first extrusion head 29 can slow down the descending speed of the second extrusion head 30 and the first-stage expansion bracket 2 by itself, when the descending speed of the first-stage expansion bracket 2 decreases, at this time, the impact applied to the air bag 28 by the first extrusion head 29 becomes small, at the internal pressure inside the air bag 28 decreases, at this time, the air bag 28 can spray internal gas out and deform, so that the first extrusion head 29 can be accommodated in the third installation groove 27, then the second extrusion head 29 and the second extrusion head 30 can slow down by the first-stage expansion bracket 2 sequentially through the first-stage expansion bracket 2 at the bottom, and the first-stage expansion bracket 2, the descending speed of the first-stage expansion bracket 2 can be further increased, and the safety bracket 2 can be decreased, and the final-stage expansion bracket falling speed of the safety bracket 2 can be further increased.

Finally, it should be noted that: 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 changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A multi-stage material lifting device with a safety self-locking function comprises a mounting frame (1);

the primary telescopic frame (2) is arranged inside the mounting frame (1);

the secondary expansion bracket (3) is arranged inside the primary expansion bracket (2);

the small pulley (4) is arranged inside the secondary expansion bracket (3);

the driving winding drum (5) is fixedly connected to the top of the mounting frame (1), a steel wire rope (6) is arranged on the outer wall of the driving winding drum (5), and the steel wire rope (6) is matched with the primary expansion bracket (2), the secondary expansion bracket (3) and the jigger (4);

the method is characterized in that:

two first mounting grooves (7), two have been seted up to mounting bracket (1) inside symmetry first mounting groove (7) inside locating plate (8) that all is equipped with, the first slide (9) of locating plate (8) one end fixedly connected with, one-level expansion bracket (2) surface symmetry sets up two constant head tanks (10) with locating plate (8) looks adaptation, mounting bracket (1) outer wall fixedly connected with installation piece (11), second mounting groove (12) have been seted up to installation piece (11) inside, installation piece (11) outer wall fixedly connected with motor (13), the inside rotation of second mounting groove (12) is connected with ball screw (14), motor (13) output and ball screw (14) fixed connection, ball screw (14) outside symmetry is equipped with screw-nut slide (15) of two looks adaptations, first slide (9) one end fixedly connected with connects rope (16).

2. The multi-stage material lifting equipment with the safety self-locking function as claimed in claim 1, wherein: the mounting bracket is characterized in that a first sliding groove (17) matched with the first sliding plate (9) is formed in the mounting bracket (1), the first sliding plate (9) is connected with the mounting bracket (1) in a sliding mode through the first sliding groove (17), and the positioning plate (8) is connected with the first sliding groove (17) in a sliding mode through the first sliding plate (9).

3. The multi-stage material lifting equipment with the safety self-locking function as claimed in claim 1, wherein: the other end of the connecting rope (16) is fixedly connected with the screw nut sliding plate (15), the two limiting rings (18) are symmetrically and fixedly connected to the top of the mounting block (11), and the limiting rings (18) are sleeved outside the connecting rope (16).

4. The multi-stage material lifting device with the safety self-locking function according to claim 1, characterized in that: recess (19) have been seted up to the one end of locating plate (8) keeping away from first slide (9), recess (19) internal rotation is connected with gyro wheel (20), gyro wheel (20) one end extends to recess (19) outside.

5. The multi-stage material lifting equipment with the safety self-locking function as claimed in claim 1, wherein: the one end fixedly connected with first spring (21), two of locating plate (8) are kept away from in first slide (9) the first fixed block (22) of the inside equal fixedly connected with of first mounting groove (7), first logical groove (23) have been seted up to first fixed block (22) inside, the first spring (21) other end and first fixed block (22) fixed connection, connect rope (16) and run through in first logical groove (23).

6. The multi-stage material lifting device with the safety self-locking function according to claim 1, characterized in that: two second through grooves (24) have been seted up to mounting bracket (1) both ends symmetry, two the second is led to groove (24) inside and all is rotated and is connected with supporting wheel (25), connect rope (16) and be located supporting wheel (25) top.

7. The multi-stage material lifting device with the safety self-locking function according to claim 1, characterized in that: the external symmetry of ball screw (14) is equipped with two opposite direction's screw, two spacing grooves (26) have been seted up to installation piece (11) top symmetry, screw-nut slide (15) pass through spacing groove (26) and installation piece (11) sliding connection, screw-nut slide (15) top extends to installation piece (11) outside.

8. The multi-stage material lifting device with the safety self-locking function according to claim 1, characterized in that: a plurality of third mounting grooves (27) have been seted up to inside symmetry equidistance of one-level expansion bracket (2), and are a plurality of third mounting groove (27) are inside all to be equipped with gasbag (28), the first extrusion head (29) of gasbag (28) one end fixedly connected with, the one end shape that gasbag (28) were kept away from in first extrusion head (29) is the arc, one-level expansion bracket (2) bottom is equipped with second extrusion head (30) of looks adaptation, second extrusion head (30) shape is the arc.

9. The multi-stage material lifting device with the safety self-locking function according to claim 8, characterized in that: first extrusion head (29) outer wall symmetry two first slider (31) of fixedly connected with, inside second spout (32) of seting up with first slider (31) looks adaptation in mounting bracket (1), first extrusion head (29) is through first slider (31) and second spout (32) sliding connection, and is a plurality of inside equal fixedly connected with second fixed block (33) of third mounting groove (27), gasbag (28) other end and second fixed block (33) fixed connection, breather pipe (34) that fixed block one end fixedly connected with is linked together with gasbag (28).

10. The multi-stage material lifting device with the safety self-locking function as claimed in claim 9, wherein: the inside fixedly connected with second spring (35) of second spout (32), the other end and first slider (31) fixed connection of second spring (35).

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