CN218754544U

CN218754544U - Building construction location hoist and mount frame

Info

Publication number: CN218754544U
Application number: CN202223228457.7U
Authority: CN
Inventors: 司翔; 林荣顺; 凌礼贤; 陈新昌; 柴吉元
Original assignee: China Construction Seventh Engineering Division Corp Ltd
Current assignee: China Construction Seventh Engineering Division Corp Ltd
Priority date: 2022-12-03
Filing date: 2022-12-03
Publication date: 2023-03-28
Anticipated expiration: 2032-12-03

Abstract

The utility model discloses a building construction location hoist and mount frame has solved the not high problem of hoist and mount frame individual layer hoisting point structure security among the prior art. The utility model discloses a support body, support body lower part sliding connection have electric block, still include the backup pad, the upper portion and the electric block of backup pad are connected, and the sub-unit connection of backup pad has at least one two hoisting point mechanisms that are used for connecting the hoist subassembly, and every two hoisting point mechanisms all include first hoisting point subassembly and second hoisting point subassembly, and first hoisting point subassembly all is connected with the hoist subassembly with the second hoisting point subassembly. The backup pad is connected with the jib through first hoisting point subassembly, second hoisting point subassembly in this device, has realized two hoisting point functions, prevents that a hoisting point fracture from causing the hoist and mount thing to fall, and the security is higher. The lifting appliance component can fix and limit the lifted building construction articles, and prevent the lifted articles from being deviated and falling in the lifting process.

Description

Building construction location hoist and mount frame

Technical Field

The utility model relates to a hoist and mount frame technical field especially indicates a building construction location hoist and mount frame.

Background

Hoisting is a general term for the installation and positioning of equipment by a crane or a hoisting mechanism; the hoisting frame plays a role in lifting weight in the building construction process, can hoist and transport building construction materials or equipment to required height and position, and has more and more strict requirements on the hoisting frame along with continuous research and development of the building construction industry. In the use process of the hoisting frame, when the hoisting frame is moved aiming at a wider structure, the hoisting frame is matched with a hoisting object, and the stability requirement of the hoisting frame structure is high. However, the existing structure adopts one lifting point to bear force, the connection point is easy to fall off after long-time use, and then the falling of the object to be lifted is influenced, so that great danger is caused. If in the building site, to the suspension of prefabricated wall body, prefabricated wall body gravity is big, and the requirement to hoist and mount frame is high, can make prefabricated wall body drop when hoist and mount frame unstability, causes the damage of prefabricated wall body and to constructor's potential safety hazard.

Among the prior art if publication number is CN212127283U, application date 2020.04.20's chinese utility model patent discloses a building location hoist and mount frame, including the base be equipped with the support column on the base, the support column is passed through at the hoisting platform both ends and is supported, and the hoisting platform middle part is equipped with the hole for hoist that runs through, and wire rope one end is passed the hole for hoist and is connected with hoist and mount, and the other end passes through pulley fixed subassembly and is connected with the winding up roll hoisting hole department is equipped with the hole for hoist fixing device that the symmetry set up, carries out the second grade through pulley fixed subassembly, hole for hoist fixing device to the wire rope that reaches the position and fixes, can make the article for hoist keep the normal position for a long time, carry out the second grade through pulley fixed subassembly, hole for hoist fixed device to the wire rope that reaches the position and fix, can make the article for hoist and keep the normal position for a long time, effectively prevent the emergence that drops. However, the hoisting position of the comparison file adopts a single hoisting point, if the hoisting point is broken, the hoisted object is easy to fall, and the safety is lower.

SUMMERY OF THE UTILITY MODEL

Not enough to in the above-mentioned background art, the utility model provides a construction location hoist and mount frame has solved the not high problem of hoist and mount frame individual layer hoisting point structural security among the prior art.

The technical scheme of the utility model is realized like this: the utility model provides a construction location hoist and mount frame, includes the support body, and support body lower part sliding connection has the electric hoist, still includes the backup pad, and the upper portion and the electric hoist of backup pad are connected, and the sub-unit connection of backup pad has at least one two hoisting point mechanisms that are used for connecting the hoist subassembly, and every two hoisting point mechanisms all include first hoisting point subassembly and second hoisting point subassembly, and first hoisting point subassembly all is connected in backup pad and hoist subassembly with the second hoisting point subassembly.

Furthermore, the first hoisting point assembly comprises a first hoisting ring and a second hoisting ring connected with the first hoisting ring, the first hoisting ring is connected to the lower portion of the supporting plate, and the second hoisting ring is connected to the upper portion of the lifting appliance assembly.

Furthermore, the second hoisting point assembly comprises a scissor type telescopic piece, the upper portion of the scissor type telescopic piece is hinged to the upper base, the upper base is fixedly connected to the supporting plate, the lower portion of the scissor type telescopic piece is hinged to the lower base, the lower base is fixedly connected to the lifting appliance assembly, and the scissor type telescopic piece is located on the outer side of the first hoisting point assembly.

Furthermore, a first sliding groove is formed in the upper base, a second sliding groove is formed in the lower base, connecting rods are hinged to the two ends of the shear type telescopic piece, and the connecting rods are arranged in the first sliding groove and the second sliding groove in a sliding mode.

Furthermore, the lifting appliance assembly comprises a horizontally arranged lifting rod and a vertical rod symmetrically arranged on the lower portion of the lifting rod, the upper portion of the lifting rod is connected with the first lifting point assembly and the second lifting point assembly, a transverse groove is formed in the lower portion of the lifting rod, and an adjusting piece matched with the vertical rod is arranged in the transverse groove.

Further, the adjusting part includes double-threaded screw, and double-threaded screw rotates to be connected in the jib, and double-threaded screw's one end extends the jib and is connected with first hand wheel, and the upper portion of montant slides and sets up in the cross slot, and montant and double-threaded screw threaded connection.

Furthermore, be equipped with in the montant and erect the groove, erect the inslot and be equipped with the lifting unit who rotates the connection on the montant, the last horizontal pole that is connected with of lifting unit, and the horizontal pole slides and sets up at erecting the inslot.

Further, the lifting assembly comprises a threaded column, the threaded column is located in the vertical groove and is rotatably connected with the vertical rod, the threaded column extends downwards to form the vertical rod and is connected with the second hand wheel, and the cross rod is in threaded connection with the threaded column. The horizontal pole is T type pole, and the horizontal pole portion joint of T type pole is in erecting the inslot.

Furthermore, the upper portion of backup pad is equipped with a plurality of support rings, and wire rope on the electric block is connected with the support ring, and wire rope drives the up-and-down motion of backup pad under the electric block effect.

The beneficial effects of the utility model are that: the backup pad is connected with the jib through first hoisting point subassembly, second hoisting point subassembly in this device, has realized two hoisting point functions, prevents that a hoisting point fracture from causing the hoist and mount thing to fall, and the security is higher. The lifting appliance component can fix and limit the lifted building construction articles, and prevent the lifted articles from being deviated and falling in the lifting process. In the hoist subassembly, the montant passes through the adjusting part and removes in the jib, and the distance between two montants of the montant adjustment of being convenient for can adapt to the hoist and mount object of more sizes. The lifting component controls the transverse rod to slide in the vertical rod, so that the height of the transverse rod can be conveniently adjusted to enable the transverse rod to be matched with a hoisting object, and the applicability of the device is improved.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partial sectional view of the present invention.

Fig. 3 is an enlarged schematic structural diagram of a in fig. 2.

The labels in the figure are: 1. a frame body; 2. a support plate; 3. a boom; 4. an electric hoist; 5. a support ring; 6. a vertical rod; 7. a cross bar; 8. a first hanging ring; 9. a second hoisting ring; 10. a scissor jack; 11. an upper base; 12. a lower base; 13. a transverse groove; 14. a first hand wheel; 15. a double-ended screw; 16. a vertical slot; 17. a second hand wheel; 18. a threaded post; 19. a first chute; 20. a second chute; 21. a connecting rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

As shown in fig. 1, embodiment 1, a building construction location hoist and mount frame, including support body 1, support body 1 lower part sliding connection has electric hoist 4, is equipped with the track on the support body 1, and the pulley sliding setting on electric hoist 4 upper portion realizes the motion of electric hoist 4 on support body 1 in the track. The lifting appliance further comprises a supporting plate 2, the upper part of the supporting plate 2 is connected with an electric hoist 4, the lower part of the supporting plate 2 is connected with at least one double-lifting-point mechanism for connecting a lifting appliance component, and when the lower part of the supporting plate is connected with the double-lifting-point mechanism, the double-lifting-point mechanism is positioned in the middle of the supporting plate 2 and the lifting appliance component; when the lower part of the supporting plate 2 is connected with two double-lifting-point mechanisms, the double-lifting-point mechanisms are symmetrically arranged on the supporting plate and the lifting appliance component. This application uses the two hoisting point mechanisms that the symmetry set up as the example, and every two hoisting point mechanisms all includes first hoisting point subassembly and second hoisting point subassembly, and first hoisting point subassembly and second hoisting point subassembly all are connected with the hoist subassembly. Backup pad 2 is connected with jib 3 through first hoisting point subassembly, second hoisting point subassembly in this device, has realized two hoisting point functions, prevents that a hoisting point fracture and cause the hoist and mount thing to fall, and the security is higher. The lifting appliance component can fix and limit the lifted building construction articles, and prevent the lifted articles from being deviated and falling in the lifting process.

As shown in fig. 1 and 2, in embodiment 2, the first hoisting point assembly comprises a first hoisting ring 8 and a second hoisting ring 9 connected with the first hoisting ring 8, the first hoisting ring 8 is symmetrically connected to the lower part of the supporting plate 2, and the second hoisting ring 9 is symmetrically connected to the upper part of the hoisting assembly. Two first rings 8 are connected with a U-shaped rod welded on the lower portion of the supporting plate 2, two second rings 9 are welded with a U-shaped rod welded on the lifting appliance component, and the first rings 8 are sleeved in the second rings 9 to achieve movable connection of the first rings 8 and the second rings 9. The first lifting ring 8 and the second lifting ring 9 are movably connected and act on the first connection between the supporting plate 2 and the lifting appliance component. First rings 8 and the equal preferred rings that adopt steel bar welded of second rings 9, adopt steel bar welded rings to support effectually.

As shown in fig. 3, in this embodiment, the second lifting point assembly includes two symmetrically arranged scissor type telescopic members 10, each scissor type telescopic member 10 includes at least two X-shaped movable frames, each X-shaped movable frame includes two straight bars, a rotating shaft is connected to the middle of each straight bar to rotate the two movable bars, a connecting hole is formed in an end of each straight bar, and two adjacent X-shaped movable frames are connected by a connecting shaft arranged in the connecting hole. Five X-shaped movable frames are connected to form a scissor type telescopic piece 10, the upper portion of the scissor type telescopic piece 10 is hinged to an upper base 11, the upper base 11 is fixed to a supporting plate 2, the lower portion of the scissor type telescopic piece 10 is hinged to a lower base 12, the lower base 12 is fixed to a lifting appliance assembly, the scissor type telescopic piece 10 is located on the outer side of a first lifting point assembly, the scissor type telescopic piece 10 is a second lifting point of the device and is used for a standby lifting point of the first lifting point assembly, and the lifting appliance assembly can be prevented from falling off when the first lifting point is damaged. The telescoping function of the scissor jack 10 can be a buffer for the spreader component to fall off with the object being lifted after the first point of suspension component falls off. Go up to be equipped with first spout 19 in the base 11, be equipped with second spout 20 in the base 12 down, the both ends of cutting formula extensible member 10 all articulate there are two connecting rods, and the connecting rod is articulated with the straight-bar in the family formula extensible member, and the connecting rod slides and sets up in first spout 19 and the second spout 20, is equipped with the movable groove that is used for the connecting rod on the cell wall of first spout 19 and second spout 20, and the connecting rod slides along the movable groove, is convenient for cut formula extensible member 10 and realizes flexible function.

In this embodiment, first hoisting point subassembly and the cooperation of second hoisting point subassembly have realized two hoisting point functions, prevent that a hoisting point fracture from causing the hoist and mount thing to fall, and the security is higher. In the specific use process, if the connection part of the first hanging ring 8 and the second hanging ring 9 is broken, the lifting appliance assembly can stretch the scissor type telescopic piece 10 at the moment, the top and the bottom of the scissor type telescopic piece 10 respectively slide in the first sliding groove 19 and the second sliding groove 20, whether the second lifting point assembly is stressed can be determined according to whether the scissor type telescopic piece 10 is stretched, so that the double-lifting-point function is realized, the lifting object is prevented from falling due to the fact that one lifting point is broken, and the safety is high.

The other structures are the same as those of embodiment 1.

Embodiment 3, a construction location hoist and mount frame, hoist assembly include the jib 3 and the montant 6 of symmetry setting in the jib 3 lower part that the level set up, the upper portion and the first hoisting point subassembly of jib 3 and second hoisting point subassembly are connected, and the lower part of jib 3 is equipped with cross slot 13, is equipped with the adjusting part of being connected with montant 6 in the cross slot 13. The adjusting part comprises a double-threaded screw 15, the double-threaded screw 15 is rotatably connected in the suspender 3 through a bearing, one end of the double-threaded screw 15 extends out of the suspender 3 and is connected with a first hand wheel 14, and the vertical rod 6 is in threaded connection with the double-threaded screw 15. First hand wheel 14 rotates and makes stud 15 drive montant 6 slide along cross slot 13 for adjust the distance between two montants 6, stud 1515 can drive two montants 66 and move in opposite directions this moment, until the both sides of building construction material all contact with two montants 66.

In this embodiment, be equipped with in the montant 6 and erect groove 16, be equipped with the lifting unit who connects on montant 6 in erecting groove 16, the last horizontal pole 7 that is connected with of lifting unit, and horizontal pole 7 slides and sets up in erecting groove 16. The lifting assembly comprises a threaded column 18, the threaded column 18 is located in the vertical groove 16, the threaded column 18 is rotatably connected with the vertical rod 6, and the threaded column 18 extends downwards out of the vertical rod 6 and is connected with a second hand wheel 17. The horizontal pole 7 is T type pole, and 7 portions of horizontal pole joint of T type pole are in erecting groove 16, be equipped with on the T type pole with 18 complex screw holes of screw thread post, the rotatory screw thread post 18 of second hand wheel 17, screw thread post 18 drive horizontal pole 7 and upwards remove, until the contact of the top of building construction material and the bottom of jib 3, can fix spacingly to the article of hoist and mount, prevent to hoist and transport thing handling in-process emergence skew and drop. The upper portion of backup pad 2 is equipped with a plurality of support rings 5, and the wire rope on electric hoist 4 passes support rings 5, realizes being connected of electric hoist 4 and backup pad 2.

In the use, at first place the building construction material who treats the handling in the upside between two horizontal poles 7, then through the rotatory double-threaded screw 15 of first hand wheel 14, double-threaded screw 15 can drive two montants 6 and move in opposite directions, both sides and two montants 6 all contact until building construction material, then through the rotatory screw thread post 18 of second hand wheel 17, screw thread post 18 drives horizontal pole 7 and upwards moves, contact with the bottom of jib 3 at the top until building construction material, can fix spacingly to the article of hoist and mount, prevent to hoist thing handling in-process and take place the skew and drop, can remove the building construction material of handling to required height and position through the electric hoist.

The other structures are the same as those of embodiment 2.

As shown in fig. 1 to 3, embodiment 4, a building construction location hoist and mount frame, including support body 1, backup pad 2, the hoist subassembly, two sets of first hoisting point subassemblies and two sets of second hoisting point subassemblies, the top fixedly connected with a plurality of support ring 5 of backup pad 2, and backup pad 2 is in the below of electric hoist 4, a plurality of support ring 5 is connected with the wire rope of electric hoist 4 respectively, be provided with electric hoist 4 on the support body 1, the hoist subassembly is including jib 3, two montants 6 and two horizontal poles 7, first hoisting point subassembly is including first rings 8 and second rings 9, the second hoisting point subassembly is including cutting formula extensible member 10, upper seat 11 and lower seat 12.

As shown in fig. 1, 2 and 3, a first sliding groove 19 is formed in the bottom of the upper seat 11, a second sliding groove 20 is formed in the top of the lower seat 12, the suspension rod 3 is located below the support plate 2, the first suspension ring 8 is fixedly mounted at the bottom of the support plate 2, the second suspension ring 9 is fixedly mounted at the top of the suspension rod 3, the first suspension ring 8 is connected with the second suspension ring 9, the upper seat 11 is fixedly mounted at the bottom of the support plate 2, the lower seat 12 is fixedly mounted at the top of the suspension rod 3, the scissor type telescopic member 10 is located in front of the upper seat 11 and the lower seat 12, the top and the bottom of the scissor type telescopic member 10 are respectively located inside the first sliding groove 19 and the second sliding groove 20, and the scissor type telescopic member 10 is slidably connected with the first sliding groove 19 and the second sliding groove 20.

The double-lifting-point function is realized through the first lifting point assembly and the second lifting point assembly, the lifting object is prevented from falling due to the fact that one lifting point is broken, and safety is high.

As shown in fig. 1 and 2, a transverse groove 13 is arranged at the bottom of the suspension rod 3, a first hand wheel 14 is arranged at one side of the suspension rod 3, a double-threaded screw 15 is arranged inside the transverse groove 13, a vertical groove 16 is arranged at one side of the vertical rod 6, a second hand wheel 17 is arranged below the vertical rod 6, a threaded column 18 is arranged inside the vertical groove 16, one end of the double-threaded screw 15 penetrates through one side of the suspension rod 3 and is connected with the first hand wheel 14, the other end of the double-threaded screw 15 is rotatably connected with the inner wall of the transverse groove 13, the tops of the two vertical rods 6 are respectively arranged at two sides inside the transverse groove 13, a left-handed thread is arranged on the outer surface of one side of the double-threaded screw 15 inside the transverse groove 13, and double threaded screw 15 is in the inside opposite side surface of cross slot 13 and is provided with the right-hand thread, double threaded screw 15 runs through respectively in two montants 6, montant 6 passes through threaded connection with double threaded screw 15, and montant 6 and cross slot 13 looks adaptation, the lower extreme of screw post 18 runs through in the bottom of montant 6 and is connected with second hand wheel 17, and the upper end of screw post 18 rotates with the top inner wall that erects groove 16 and is connected, one side of a horizontal pole 7 is in the inside of erecting groove 16, and horizontal pole 7 with erect 16 looks adaptations of groove, screw post 18 is located the inside surface of erecting groove 16 and is provided with the screw thread, and screw post 18 runs through in horizontal pole 7, horizontal pole 7 passes through threaded connection with screw post 18.

Can drive two montants 6 through cross slot 13 and double threaded screw 15 and move in opposite directions or contrary, can drive two horizontal poles 7 through perpendicular groove 16 and screw post 18 and move in vertical direction, can fix spacingly to the article of hoist and mount, prevent that the skew from dropping taking place among the hoist and mount process of hoist and transport.

The utility model discloses a theory of operation is: in the using process, firstly, the building construction material to be hoisted is placed on the upper side between the two cross rods 7, then the double-threaded screw 15 is rotated through the first hand wheel 14, the double-threaded screw 15 can drive the two vertical rods 6 to move oppositely until the two sides of the building construction material are in contact with the two vertical rods 6, then the threaded column 18 is rotated through the second hand wheel 17, the threaded column 18 drives the cross rods 7 to move upwards until the top of the building construction material is in contact with the bottom of the suspension rod 3, the hoisted object can be fixed and limited, the hoisted object is prevented from being deviated and falling in the hoisting process, and the hoisted building construction material can be moved to the required height and position through the electric hoist; in the hoisting process, a hoisting point function of the hoisting assembly is achieved through the first hoisting ring 8 and the second hoisting ring 9, if the joint of the first hoisting ring 8 and the second hoisting ring 9 is broken, the hoisting assembly can stretch the scissor type telescopic piece 10 at the moment, the top and the bottom of the scissor type telescopic piece 10 respectively slide in the first sliding groove 19 and the second sliding groove 20, whether the second hoisting point assembly is stressed can be determined according to whether the scissor type telescopic piece 10 is stretched, therefore, the double hoisting point function is achieved, the situation that a hoisting object falls due to breakage of one hoisting point is prevented, and the safety is high.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a construction location hoist and mount frame, includes support body (1), and support body (1) lower part sliding connection has electric hoist (4), its characterized in that: the lifting appliance is characterized by further comprising a supporting plate (2), the upper portion of the supporting plate (2) is connected with the electric hoist (4), the lower portion of the supporting plate (2) is connected with at least one double-lifting-point mechanism used for being connected with a lifting appliance component, each double-lifting-point mechanism comprises a first lifting point component and a second lifting point component, and the first lifting point component and the second lifting point component are connected with the lifting appliance component in the supporting plate (2).

2. The building construction positioning hoisting frame according to claim 1, characterized in that: the first lifting point assembly comprises a first lifting ring (8) and a second lifting ring (9) connected with the first lifting ring (8), the first lifting ring (8) is connected to the lower portion of the supporting plate (2), and the second lifting ring (9) is connected to the upper portion of the lifting appliance assembly.

3. The building construction positioning hoisting frame according to claim 1 or 2, characterized in that: the second lifting point component comprises a scissor type telescopic piece (10), the upper portion of the scissor type telescopic piece (10) is hinged to an upper base (11), the upper base (11) is fixedly connected to the supporting plate (2), the lower portion of the scissor type telescopic piece (10) is hinged to a lower base (12), the lower base (12) is fixedly connected to the lifting appliance component, and the scissor type telescopic piece (10) is located on the outer side of the first lifting point component.

4. The building construction positioning hoisting frame according to claim 3, characterized in that: a first sliding groove (19) is formed in the upper base (11), a second sliding groove (20) is formed in the lower base (12), connecting rods (21) are hinged to two ends of the scissor type telescopic piece (10), and the connecting rods (21) are arranged in the first sliding groove (19) and the second sliding groove (20) in a sliding mode.

5. The building construction positioning hoisting frame according to claim 1, 2 or 4, characterized in that: the lifting appliance assembly comprises a lifting rod (3) and a vertical rod (6), wherein the lifting rod (3) is horizontally arranged, the vertical rod (6) is symmetrically arranged on the lower portion of the lifting rod (3), the upper portion of the lifting rod (3) is connected with a first lifting point assembly and a second lifting point assembly, a transverse groove (13) is formed in the lower portion of the lifting rod (3), and an adjusting piece matched with the vertical rod (6) is arranged in the transverse groove (13).

6. The building construction positioning hoisting frame of claim 5, wherein: the adjusting part comprises a double-threaded screw (15), the double-threaded screw (15) is rotatably connected in the suspender (3), one end of the double-threaded screw (15) extends out of the suspender (3) and is connected with a first hand wheel (14), the upper part of the vertical rod (6) is slidably arranged in the transverse groove (13), and the vertical rod (6) is in threaded connection with the double-threaded screw (15).

7. The building construction positioning hoisting frame of claim 6, wherein: the vertical rod (6) is internally provided with a vertical groove (16), the vertical groove (16) is internally provided with a lifting assembly rotatably connected to the vertical rod (6), the lifting assembly is connected with a cross rod (7), and the cross rod (7) is slidably arranged in the vertical groove (16).

8. The building construction positioning hoisting frame of claim 7, wherein: the lifting assembly comprises a threaded column (18), the threaded column (18) is located in a vertical groove (16), the threaded column (18) is rotatably connected with the vertical rod (6), the threaded column (18) extends downwards to form the vertical rod (6) and is connected with a second hand wheel (17), and the cross rod (7) is in threaded connection with the threaded column (18).

9. The building construction positioning hoisting frame of claim 8, wherein: the cross rod (7) is a T-shaped rod, and the cross rod part of the T-shaped rod is clamped in the vertical groove (16).

10. The building construction positioning hoisting frame according to any one of claims 1, 2, 4, 6, 8 and 9, characterized in that: the upper portion of backup pad (2) is equipped with a plurality of support rings (5), and wire rope on electric block (4) is connected with support ring (5), and wire rope drives the up-and-down motion of backup pad (2) under the electric block effect.