阅读说明：本技术 一种定向轮条啮合式可屈伸吊装小车 (Directional wheel strip meshing type bendable and extensible hoisting trolley ) 是由 赵向杰 房拴娃 何栋 于 2020-12-09 设计创作，主要内容包括：本发明公开了一种定向轮条啮合式可屈伸吊装小车,包括机座,机座的下方通过转动集成与底盘集成连接,机座的上方分别设置有支撑架、自动螺钉匣、螺钉定位装置、驱动装置,自动螺钉匣与螺钉定位装置连接,支撑架连接有屈伸装置Ⅰ,屈伸装置Ⅰ的一端依次连接有屈伸装置Ⅱ、屈伸装置Ⅲ、屈伸装置Ⅳ、连接块,连接块连接有吊钩,底盘集成的上设置有座椅。本发明吊装小车解决了现有技术中吊装设备结构复杂、传动效果差的问题。(The invention discloses a directional wheel strip meshed type bendable and stretchable hoisting trolley which comprises a base, wherein the lower part of the base is integrally connected with a chassis through a rotating assembly, a support frame, an automatic screw box, a screw positioning device and a driving device are respectively arranged above the base, the automatic screw box is connected with the screw positioning device, the support frame is connected with a bendable and stretchable device I, one end of the bendable and stretchable device I is sequentially connected with a bendable and stretchable device II, a bendable and stretchable device III, a bendable and stretchable device IV and a connecting block, the connecting block is connected with a lifting hook, and a seat is arranged on the chassis assembly. The hoisting trolley solves the problems of complex structure and poor transmission effect of hoisting equipment in the prior art.)

1. The utility model provides a directional spoke engagement type can bend and stretch hoist and mount dolly which characterized in that, includes frame (1), the below of frame (1) is connected with chassis integration (14) through rotating integration (11), the top of frame (1) is provided with support frame (6), automatic screw casket (3), screw positioner (4), drive arrangement (2) respectively, automatic screw casket (3) are connected with screw positioner (4), support frame (6) are connected with bends and stretches device I (5), the one end of bending and stretching device I (5) has connected gradually bends and stretches device II (7), bends and stretches device III (8), bends and stretches device IV (9), connecting block (10) are connected with lifting hook (12), be provided with seat (13) on the chassis integration (14).

2. The directional spoke engagement type flexible hoisting trolley is characterized in that the rotating assembly (11) comprises a bottom plate (11-1), one side surface of the bottom plate (11-1) is connected with the lower surface of the base (1), handrails (11-2) are symmetrically arranged on two sides of the bottom plate (11-1), a rotary table (11-7) is connected to the middle of the other side surface of the bottom plate (11-1), clamping grooves are symmetrically arranged on the other side surface of the bottom plate (11-1) and located on two sides of the rotary table (11-7) and clamped with one end of the support plate (11-6), the other end of the support plate (11-6) is connected with the chassis assembly (14) through a wrestling support I (11-5), and a central rotating shaft (11-4) is sleeved in the rotary table (11-7), two ends of the middle rotating shaft (11-4) are connected with the chassis assembly (14) through hinge supports (11-3).

3. The directional wheel-strip-meshed type flexible hoisting trolley as claimed in claim 2, the chassis assembly (14) comprises a platform (14-5), limiting frames (14-4) are arranged on the upper surface of the platform (14-5) and positioned at two sides of the bottom plate (11-1), a seat (13) is arranged on the upper surface of the platform (14-5) and at one end far away from the flexion-extension body IV (9-1), the upper surface of the platform (14-5) is connected with a wrestle I (11-5) and a hinge (11-3), the lower surface of the platform (14-5) is provided with a plurality of groups of shaft rotation bases (14-3) along the axial direction, each group of shaft rotation bases (14-3) are connected through an axle (14-1), and wheels (14-2) are arranged at two ends of the axle (14-1).

4. The directional spoke engagement type flexible hoisting trolley according to claim 1, wherein the automatic screw box (3) comprises a foot support I (3-1) connected with the upper surface of the base (1), an inner groove is formed in the foot support I (3-1), a positioning shell (3-3) is clamped in the inner groove through a buckle, a screw groove is formed in the positioning shell (3-3), a screw (3-4) is arranged in the screw groove, an ejection spring (3-2) is arranged in the inner groove of the foot support I (3-1) and positioned at the screw groove, the top end of the positioning shell (3-3) is of a through hole concave structure, and a screw positioning device (4) is arranged at the top end of the positioning shell (3-3).

5. The directional spoke meshed type flexible hoisting trolley according to claim 4, wherein the screw positioning device (4) comprises a foot support II (4-1) connected with the upper surface of the base (1), the foot support II (4-1) is connected with one end of a supporting rod (4-2), the other end of the supporting rod (4-2) is connected with a short shaft II (4-3), two ends of the short shaft II (4-3) are connected with clamps (4-5), a motor II (4-4) is connected between the clamps (4-5), and the motor II (4-4) is arranged on a concave structure of a through hole at the top end of the positioning shell (3-3).

6. The directional spoke engagement type flexible hoisting trolley according to claim 1, wherein the driving device (2) comprises a guide rail I (2-6) and a guide rail II (2-13) which are arranged on the upper surface of the base (1) in parallel, a slide block I (2-5) is arranged on the guide rail I (2-6), a hinged support II (2-4) is connected to the slide block I (2-5), a slide block II (2-10) is arranged on the guide rail II (2-13), a hinged support III (2-8) is connected to the slide block II (2-10), the hinged support III (2-8) and the hinged support II (2-4) are connected through a stepped shaft I (2-2), a hinged support I (2-3) is sleeved outside the stepped shaft I (2-2), be connected with motor I (2-1) on free bearing I (2-3), the output of motor I (2-1) is connected with gear I (2-14), on I (2-2) of step shaft and be located free bearing I (2-3) side shaft hub connection have gear II (2-7), gear II (2-7) meshing has rack V (2-12), rack V (2-12) set up in the upper surface of frame (1), the end connection that I (2-2) of step shaft is close to rack V (2-12) has rotation valve hand (2-9), the edge of rotation valve hand (2-9) is provided with shakes pendulum rod (2-11).

7. The directional wheel strip meshed type bendable and stretchable hoisting trolley according to claim 6 is characterized in that the bendable and stretchable device I (5) comprises a bendable and stretchable device I (5), a pair of guide rails III (5-3) are arranged on the upper surface of the outer side of the bendable and stretchable body I (5-1), a slide block III is arranged on the pair of guide rails III (5-3), the slide block III is connected with a top plate of the support frame (6), a rack I (5-2) is arranged at the bottom end of the bendable and stretchable body I (5-1), the rack I (5-2) is meshed with a gear I (2-14), and a bendable and stretchable device II (7) is connected to the inner side of the bendable and stretchable body I (5-1).

8. The directional wheel strip meshed type bendable and stretchable hoisting trolley according to claim 7 is characterized in that the bendable and stretchable device II (7) comprises a bendable and stretchable body II (7-1), a rack II (7-2) is arranged at the bottom end of the bendable and stretchable body II (7-1), the rack II (7-2) and the rack I (5-2) are arranged on the same side, the rack II (7-2) is meshed with a gear I (2-14), a pair of guide rails IV (7-3) are arranged on the upper surface of the outer side of the bendable and stretchable body II (7-1), a slide rail I (7-4) is arranged on the pair of guide rails IV (7-3), and the slide rail I (7-4) is connected with the top of the inner side of the bendable and stretchable body I (5-1).

9. The directional wheel strip meshed type bendable and stretchable hoisting trolley according to claim 8, wherein the bendable and stretchable device III (8) comprises a bendable and stretchable body III (8-1), a rack III (8-2) is arranged at the bottom end of the bendable and stretchable body III (8-1), the rack III (8-2) and the rack II (7-2) are arranged on the same side, the rack III (8-2) is meshed with a gear I (2-14), a pair of guide rails V (8-4) are arranged on the upper surface of the outer side of the bendable and stretchable body III (8-1), a slide rail II (8-3) is arranged on the pair of guide rails V (8-4), and the slide rail II (8-3) is connected with the top of the inner side of the bendable and stretchable body II (7-1).

10. The directional wheel-strip-meshed type flexible hoisting trolley as claimed in claim 9, the flexion and extension device IV (9) comprises a flexion and extension body IV (9-1), the bottom end of the flexion and extension body IV (9-1) is provided with a rack IV (9-2), the rack IV (9-2) and the rack III (8-2) are arranged at the same side, the rack IV (9-2) is meshed with the gear I (2-14), the upper surface of the outer side of the flexion-extension body IV (9-1) is provided with guide rails VI (9-4), a pair of guide rails VI (9-4) is provided with a slide rail III (9-3), the slide rail III (9-3) is connected with the top of the inner side of the flexion-extension body III (8-1), and one end, far away from the flexion-extension body III (8-1), of the flexion-extension body IV (9-1) is connected with a connecting block (10).

Technical Field

The invention belongs to the technical field of hoisting devices, and particularly relates to a directional spoke meshed type flexible and extensible hoisting trolley.

Background

In the field of conventional engineering machinery, a long-distance bending and stretching device has a wide application prospect, and the long-distance bending and stretching device particularly relates to a directional wheel strip meshed type bending and stretching hoisting trolley which can be widely applied to the fields of photography, civil engineering, decoration, agriculture and the like. The good and efficient transmission of the bending and stretching device can effectively ensure the stability and effectiveness of the hoisting operation of the output main body, and in the existing transmission mechanism, the mechanical structure systems capable of bending and stretching in a long distance are relatively few. In current telescoping device, some schemes are realized flexible through the counterpoint block of hold-in range, and some realize flexible through hydraulic transmission, and some realizes shrink etc. through the scaffold frame mode of building progressively, and its relevant scheme all has great problem. Firstly, the expansion and contraction are realized through the alignment and the clamping of the synchronous belts, and the biggest problems are that the stress performance of the synchronous belts is poor, the strength of the connection points of the synchronous belts is not enough, and the phenomena of output fracture and bending of the expansion and contraction device are easy to happen suddenly in a long distance; secondly, the hydraulic transmission cost is relatively high, the transmission matching construction is large, and the engineering construction economy is not realized; finally, the scaffold is gradually built in a traditional telescopic mode, so that the telescopic efficiency is low, the manual construction cost is high and the like; it is necessary to use a highly efficient flexion-extension transmission. The existing bending and stretching device has the problems of insufficient strength, poor economic benefit, low bending and stretching automation degree and the like, and the engineering practical construction requirements are difficult to meet. The existing transmission structure is complex, engineering construction is complex, the application range is relatively limited, the cost is high, the assembly is complex, and finally the production cost is relatively high.

At present, for the field of bending and stretching devices and methods, the existing related machines have the defects of complex structure, high manufacturing cost, high requirements on manufacturing and assembling, complex assembling process, difficult maintenance and the like, and the reduction of the process difficulty through structural optimization is already the mainstream trend of the field of bending and stretching devices and methods. In all transmission modes, the gear rack transmission is widely applied in various engineering practice fields due to the high-efficiency transmission ratio and reliability of the gear rack transmission. The gear rack is applied to the traditional structure of a flexible system, so that the precision and stability of transmission can be guaranteed, and the gear rack also has an important practical engineering practice effect on the transmission efficiency.

Disclosure of Invention

The invention aims to provide a directional spoke meshed type bendable and extensible hoisting trolley, which solves the problems of complex structure and poor transmission effect of hoisting equipment in the prior art.

The invention adopts the technical scheme that the directional wheel strip meshed type retractable hoisting trolley comprises a base, wherein the lower part of the base is integrally connected with a chassis through a rotating assembly, a support frame, an automatic screw box, a screw positioning device and a driving device are respectively arranged above the base, the automatic screw box is connected with the screw positioning device, the support frame is connected with a flexing and extending device I, one end of the flexing and extending device I is sequentially connected with a flexing and extending device II, a flexing and extending device III, a flexing and extending device IV and a connecting block, the connecting block is connected with a lifting hook, and a seat is arranged on the chassis assembly.

The present invention is also characterized in that,

the rotation assembly comprises a bottom plate, one side face of the bottom plate is connected with the lower surface of the base, armrests are symmetrically arranged on two sides of the bottom plate, a rotary table is connected to the middle of the other side face of the bottom plate, clamping grooves are symmetrically arranged on two sides of the rotary table on the other side face of the bottom plate, the clamping grooves are connected with one ends of the supporting plates in a clamping mode, the other ends of the supporting plates are integrally connected with the chassis through wrestling supports I, a center rotating shaft is sleeved in the rotary table, and two ends of the center rotating shaft are.

The chassis is integrated including the platform, and the upper surface of platform just is located the bottom plate both sides and is provided with spacing, and the upper surface of platform just keeps away from the one end of stretching the body IV and is provided with the seat, and the upper surface of platform with tumble a I, hinge and be connected, the lower surface of platform is provided with a plurality of groups axle swivel mounts along its axial, connects through the axletree between every group axle swivel mount, and the both ends of axletree are provided with the wheel.

The automatic screw box comprises a foot support I connected with the upper surface of the machine base, an inner groove is formed in the foot support I, a positioning shell is clamped in the inner groove through a buckle, a screw groove is formed in the positioning shell, a screw is arranged in the screw groove, an ejection spring is arranged in the position, located in the screw groove, of the inner groove of the foot support I, the top end of the positioning shell is of a through hole concave structure, and a screw positioning device is arranged at the top end of the positioning shell.

Screw positioner includes the foot II with frame upper surface connection, and the foot II is connected with the one end of bracing piece, and the other end and the minor axis II of bracing piece are connected, and the both ends of minor axis II are connected with anchor clamps, are connected with motor II between the anchor clamps, and motor II sets up on the top through-hole "concave" type structure of location shell.

Drive arrangement is including parallel arrangement in guide rail I and the guide rail II of frame upper surface, be provided with slider I on the guide rail I, be connected with free bearing II on the slider I, be provided with slider II on the guide rail, be connected with free bearing III on the slider II, free bearing III passes through I connection of step shaft with free bearing II, free bearing I has been cup jointed to the outside of step shaft I, be connected with motor I on the free bearing I, the output of motor I is connected with gear I, I side hub connection of step shaft on and be located the free bearing has gear II, II meshing of gear have rack V, rack V sets up in the upper surface of frame, the end connection that I is close to rack V of step shaft has the rotation valve hand, the edge of rotation valve hand is provided with and waves the pendulum rod.

The bending and stretching device I comprises a bending and stretching device I, a pair of guide rails III is arranged on the upper surface of the outer side of the bending and stretching body I, a slide block III is arranged on the pair of guide rails III, the slide block III is connected with a top plate of the supporting frame, a rack I is arranged at the bottom end of the bending and stretching body I, and the rack I is meshed with a gear I and is connected with a bending and stretching device II on the inner side of the bending and stretching body I.

The bending and stretching device II comprises a bending and stretching body II, a rack II is arranged at the bottom end of the bending and stretching body II, the rack II and the rack I are arranged on the same side, the rack II is meshed with the gear I, a pair of guide rails IV is arranged on the upper surface of the outer side of the bending and stretching body II, a slide rail I is arranged on the pair of guide rails IV, and the slide rail I is connected with the top of the inner side of the bending and stretching body I.

The bending and stretching device III comprises a bending and stretching body III, a rack III is arranged at the bottom end of the bending and stretching body III, the rack III and the rack II are arranged on the same side, the rack III is meshed with the gear I, a pair of guide rails V is arranged on the upper surface of the outer side of the bending and stretching body III, a slide rail II is arranged on the pair of guide rails V, and the slide rail II is connected with the top of the inner side of the bending and stretching body II.

The bending and stretching device IV comprises a bending and stretching body IV, a rack IV is arranged at the bottom end of the bending and stretching body IV, the rack IV and the rack III are arranged on the same side, the rack IV is meshed with the gear I, a guide rail VI is arranged on the upper surface of the outer side of the bending and stretching body IV, a pair of guide rails VI are provided with a slide rail III, the slide rail III is connected with the top of the inner side of the bending and stretching body III, and one end, far away from the bending and stretching body III, of the bending and stretching body IV.

The invention has the beneficial effects that: the directional wheel strip meshing type bendable and extensible hoisting trolley has the advantages that the structure is simple, the installation process is reduced, the transmission effect is good, the position of hoisted goods can be adjusted, the transmission function is realized by adopting gear and rack meshing, the directional wheel strip meshing type bendable and extensible hoisting trolley has good flexibility, the bending and extending degree is enhanced, and the cost is reduced.

Drawings

FIG. 1 is a schematic structural view of a directional spoke-meshing type flexible hoisting trolley of the invention;

FIG. 2 is a schematic structural diagram of a driving device of a directional spoke-meshing type flexible hoisting trolley of the invention;

FIG. 3 is a schematic structural view of a screw positioning device and an automatic screw magazine of a directional spoke-engaging type flexible hoisting trolley according to the present invention;

FIG. 4 is a side view of a directional spoke-engaging type collapsible trolley according to the present invention;

FIG. 5 is an enlarged view I of the rotation integration in the directional spoke-meshing type flexible hoisting trolley of the invention;

FIG. 6 is an enlarged view II of the rotation assembly of the directional spoke-engaging type flexible hoisting trolley of the present invention;

FIG. 7 is an enlarged view of a drive device in a directional spoke-engaging type flexible and extensible hoisting trolley according to the present invention;

fig. 8 is an enlarged view of the automatic screw magazine and screw positioning device in a directional spoke-engaging collapsible hoist trolley of the present invention.

In the figure, 1, a machine base, 2, a driving device, 3, an automatic screw box, 4, a screw positioning device, 5, a bending and stretching device I, 6, a supporting frame, 7, a bending and stretching device II, 8, a bending and stretching device III, 9, a bending and stretching device IV, 10, a connecting block, 11, a rotation integration, 12, a hook, 13, a seat and 14, a chassis integration are arranged;

2-1, a motor I, 2-2, a stepped shaft I, 2-3, a hinged support I, 2-4, a hinged support II, 2-5, a sliding block I, 2-6, a guide rail I, 2-7, a gear II, 2-8, a hinged support III, 2-9, a rotary valve handle, 2-10, a sliding block II, 2-11, a rocking swing rod, 2-12, a rack V, 2-13, a guide rail II, 2-14 and a gear I;

3-1, a foot support I, 3-2, an ejection spring, 3-3, a positioning shell and 3-4 screws;

4-1, a foot support II, 4-2, a support rod, 4-3, a short shaft II, 4-4, a motor II, 4-5 and a clamp;

5-1, a bending and stretching body I, 5-2, a rack I, 5-3 and a guide rail III;

7-1, a flexion-extension body II, 7-2, a rack II, 7-3, a guide rail IV, 7-4, a slide rail I;

8-1, 8-2, 8-3, 8-4 and V rack;

9-1, 9-2 of a bending and stretching body IV, 9-3 of a rack IV, 9-3 of a sliding rail III, 9-4 of a guide rail VI;

11-1 parts of a bottom plate, 11-2 parts of a handrail, 11-3 parts of a hinge support, 11-4 parts of a central rotating shaft, 11-5 parts of a wrestle support I, 11-6 parts of a support plate and 11-7 parts of a turntable;

14-1 axle, 14-2 wheels, 14-3 axle swivel mounts, 14-4 limiting frames and 14-5 platforms.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The invention relates to a directional wheel strip meshed type bendable and stretchable hoisting trolley, which comprises a machine base 1, wherein the lower part of the machine base 1 is connected with a chassis assembly 14 through a rotating assembly 11, a support frame 6, an automatic screw box 3, a screw positioning device 4 and a driving device 2 are respectively arranged above the machine base 1, the automatic screw box 3 is connected with the screw positioning device 4, the support frame 6 is connected with a bendable and stretchable device I5, one end of the bendable and stretchable device I5 is sequentially connected with a bendable and stretchable device II 7, a bendable and stretchable device III 8, a bendable and stretchable device IV 9 and a connector 10, the connector 10 is connected with a lifting hook 12, and a seat 13 is arranged on the chassis assembly 14.

As shown in FIGS. 5 and 6, the rotating assembly 11 comprises a base plate 11-1, one side surface of the base plate 11-1 is connected with the lower surface of the base 1 through screws, armrests 11-2 are symmetrically welded on two sides of the base plate 11-1, a turntable 11-7 is connected with the middle part of the other side surface of the base plate 11-1 through bronze drum screws, clamping grooves are symmetrically arranged on the other side surface of the base plate 11-1 and positioned on two sides of the turntable 11-7, the clamping grooves are clamped with one ends of support plates 11-6, the clamping plates 11-6 are clamped at different positions of the clamping grooves for angle adjustment, the other ends of the support plates 11-6 are connected with a chassis assembly 14 through wrestling supports I11-5, a central rotating shaft 11-4 is sleeved in the turntable 11-7, and two ends of the central rotating shaft 11-4 are connected with the chassis assembly.

The chassis assembly 14 comprises a platform 14-5, limiting frames 14-4 are connected to the upper surface of the platform 14-5 and located on two sides of a bottom plate 11-1 through screws, a seat 13 is arranged on the upper surface of the platform 14-5 and located at one end, far away from a flexion-extension body IV 9-1, of the platform 14-5, the upper surface of the platform 14-5 is connected with a wrestling support I11-5 and a hinge support 11-3, a plurality of sets of shaft rotation bases 14-3 are connected to the lower surface of the platform 14-5 along the axial direction of the platform 14-5 through screws, each set of shaft rotation bases 14-3 are connected through an axle 14-1, and wheels 14-2 are arranged at two ends.

As shown in figures 3 and 7, the automatic screw box 3 comprises a foot support I3-1 connected with the upper surface of the machine base 1, an inner groove is arranged in the foot support I3-1, a positioning shell 3-3 is clamped in the inner groove through a buckle, a screw groove is formed in the positioning shell 3-3 in a compression molding mode, a plurality of screws 3-4 are arranged in the screw groove, the screws 3-4 are arranged in vertical rows, an ejection spring 3-2 is arranged in the inner groove of the foot support I3-1 and positioned in the screw groove, the ejection spring 3-2 acts on the screws 3-4 arranged in the vertical rows in a jacking mode to realize automatic ejection of the screws 3-4, the top end of the positioning shell 3-3 is of a through hole concave structure, and a screw positioning device 4 is arranged at the top end of the positioning shell 3-3.

The screw positioning device 4 comprises a foot support II 4-1 which is connected with the upper surface of the base 1 through a bolt, the foot support II 4-1 is connected with one end of a supporting rod 4-2 through a welding mode, the other end of the supporting rod 4-2 is connected with a short shaft II 4-3, two ends of the short shaft II 4-3 are connected with clamps 4-5 through screws, a motor II 4-4 is connected between the clamps 4-5 through a screw, the motor II 4-4 is arranged on a concave structure of a through hole at the top end of the positioning shell 3-3, the motor II 4-4 orients to push the screw 3-4 out of a screw groove position so that the screw 3-4 is connected and positioned with the bending and stretching device I5, the bending and stretching device II 7, the bending and stretching device III 88 or the bending and stretching device IV 9, or the motor II 4-4 relaxes the screw 3-4 back into the.

As shown in figures 2 and 8, the driving device 2 comprises guide rails I2-6 and guide rails II 2-13 which are arranged on the upper surface of the base 1 in parallel, a sliding block I2-5 is arranged on the guide rail I2-6, the sliding block I2-5 slides on the guide rail I2-6, the sliding block I2-5 is connected with a hinged support II 2-4 through a screw, a sliding block II 2-10 is arranged on the guide rail II 2-13, the sliding block II 2-10 slides on the guide rail II 2-13, the sliding block II 2-10 is connected with a hinged support III 2-8 through a screw, the hinged support III 2-8 is connected with the hinged support II 2-4 through a stepped shaft I2-2, two ends of the stepped shaft I2-2 are fixed with end covers through bearings on through holes of the hinged support III 2-8 and the hinged support II 2-4, the hinged support I2-3 is fixed with the hinged support III 2-8 through a pin, the hinge I2-3 is sleeved outside the stepped shaft I2-2, the hinge I2-3 is connected with a motor I2-1 through a screw, the output end of the motor I2-1 is connected with a gear I2-14 through a shaft hub, the gear II 2-7 is connected on the stepped shaft I2-2 and located on the side face of the hinge I2-3 through a shaft hub, the gear II 2-7 is meshed with a rack V2-12 to drive the motor I2-1 to realize lane change transmission, the rack V2-12 is arranged on the upper surface of the base 1, a port extending out of a key groove is formed in the end portion, close to the rack V2-12, of the stepped shaft I2-2, the port of the stepped shaft I2-2 is connected with a rotary valve handle 2-9 through a shaft hub, and a shaking swing rod 2-11 is arranged at the edge of the rotary valve.

The flexion and extension device I5 comprises a flexion and extension device I5, the upper surface of the outer side of the flexion and extension body I5-1 is connected with a pair of guide rails III 5-3 through counter bore screws, the pair of guide rails III 5-3 are arranged in parallel, a slide block III is arranged on the pair of guide rails III 5-3, the slide block III is connected with a top plate of the support frame 6 through bolts, a rack I5-2 is arranged at the bottom end of the flexion and extension body I5-1, the rack I5-2 is meshed with a gear I2-14, and the inner side of the flexion and extension body I5-1 is connected with a flexion and extension device II 7 through.

The flexion and extension device II 7 comprises a flexion and extension body II 7-1, a rack II 7-2 is arranged at the bottom end of the flexion and extension body II 7-1, the rack II 7-2 is arranged on the same side as the rack I5-2, the rack II 7-2 is meshed with a gear I2-14, the upper surface of the outer side of the flexion and extension body II 7-1 is connected with a pair of guide rails IV 7-3 through counter bore screws, the pair of guide rails IV 7-3 are arranged in parallel, a slide rail I7-4 is arranged on the pair of guide rails IV 7-3, and the slide rail I7-4 is connected with the top of the inner side of the flexion and extension body I5-1 through.

The flexion and extension device III 8 comprises a flexion and extension body III 8-1, a rack III 8-2 is arranged at the bottom end of the flexion and extension body III 8-1, the rack III 8-2 and the rack II 7-2 are arranged on the same side, the rack III 8-2 is meshed with a gear I2-14, the upper surface of the outer side of the flexion and extension body III 8-1 is connected with a pair of guide rails V8-4 through counter bore screws, the pair of guide rails V8-4 are connected in parallel, a slide rail II 8-3 is arranged on the pair of guide rails V8-4, and the slide rail II 8-3 is connected with the top of the inner side of the flexion and extension body II 7-1 through counter.

The flexion and extension device IV 9 comprises a flexion and extension body IV 9-1, a rack IV 9-2 is arranged at the bottom end of the flexion and extension body IV 9-1, the rack IV 9-2 and the rack III 8-2 are arranged on the same side, the rack IV 9-2 is meshed with a gear I2-14, the upper surface of the outer side of the flexion and extension body IV 9-1 is connected with a pair of guide rails VI 9-4 through counter bore screws, the pair of guide rails VI 9-4 are arranged in parallel, the pair of guide rails VI 9-4 are provided with slide rails III 9-3, the slide rails III 9-3 are connected with the top of the inner side of the flexion and extension body III 8-1 through counter bore screws, and one end, far away from the flexion and extension body III 8-1, of the flexion and extension body.

Positioning holes are uniformly arranged on the side walls of the flexion-extension body I5-1, the flexion-extension body II 7-1, the flexion-extension body III 8-1 and the flexion-extension body IV 9-1, and are arranged on the same side as the rack I5-2.

The gear I2-14 is meshed with the rack IV 9-2, the rack III 8-2, the rack II 7-2 and the rack I5-2 in a staged manner, so that the bending and stretching operation is realized.

The motor I2-1 and the motor II 4-4 both adopt intermittent stepping motors.

When the lifting device is used, the motor I2-1 is started, the gear I2-14 rotates, the swinging rod 2-11 rotates according to needs to enable the gear II to move on the rack V2-12, the gear I2-14 is meshed with the rack IV 9-2, the rack III 8-2, the rack II 7-2 and the rack I5-2 in a staged mode to achieve bending and stretching operation, after the gear I is bent and stretched to a proper position, the motor II 4-4 is started, the screw 3-4 is pushed into a positioning hole in the side wall of the bending and stretching body I to be positioned, the upper position and the lower position of the screw are adjusted through the clamping position between the support plate 11-6 and the clamping groove, and after the position is adjusted, goods are lifted by the lifting hook.