CN217023894U

CN217023894U - Hanging basket assembly for intelligent three-dimensional warehouse

Info

Publication number: CN217023894U
Application number: CN202220157672.3U
Authority: CN
Inventors: 宋石平; 辛焕钰; 龙有才; 黄颂
Original assignee: Jiangxi Huifeng Intelligent Logistics Equipment Co ltd
Current assignee: Jiangxi Huifeng Intelligent Logistics Equipment Co ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-07-22
Anticipated expiration: 2032-01-20

Abstract

The utility model discloses a hanging basket assembly for an intelligent three-dimensional warehouse, which belongs to the technical field of logistics and comprises a hanging bracket and stand columns, wherein lifting frames are fixedly arranged at the tops of two ends of the hanging bracket, the lifting frames are connected to the stand columns in a sliding and clamping manner, two telescopic frames are arranged on the top surface of the hanging bracket, angle steels are fixedly welded on the outer walls of the two ends of each telescopic frame, the angle steels are bolted to the hanging bracket through bolts, a driving mechanism is arranged between the inner walls of the hanging bracket, and the driving mechanism is connected with the telescopic frames. The column mouting is between two rows of three-dimensional storehouse goods shelves, and the gallows goes up and down along the stand under capstan winch equipment and the drive of hank rope to make the gallows go up and down to goods shelves and correspond the height, actuating mechanism drives the expansion bracket and slides, makes the expansion bracket can stretch out to the gallows both sides, thereby with goods on the goods shelves support to the gallows on, be convenient for carry out the goods to high altitude goods shelves and get and put, it is convenient to use.

Description

Hanging basket assembly for intelligent three-dimensional warehouse

Technical Field

The utility model relates to the technical field of logistics, in particular to a hanging basket assembly for an intelligent three-dimensional warehouse.

Background

At present, the intelligent warehousing of the warehousing and logistics industry has high requirements on warehouses, the internal space height of a factory building for intelligent warehousing is limited, the warehouse height is large, and a common forklift cannot rise to the top of a three-dimensional warehouse when goods are taken and placed due to the large height of the three-dimensional warehouse, so that hanging baskets adaptive to the three-dimensional warehouse need to be formulated to lift and transport the goods to the three-dimensional warehouse, the requirements of the intelligent three-dimensional warehouse are met, and therefore a hanging basket assembly for the intelligent three-dimensional warehouse is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a hanging basket assembly for an intelligent three-dimensional garage, which solves the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a hanging flower basket subassembly for three-dimensional storehouse of intelligence, includes gallows and stand, the equal fixed mounting crane in both ends top of gallows, the crane slip joint is on the stand, the top surface of gallows is equipped with two expansion brackets, the equal fixed welding angle steel in both ends outer wall of expansion bracket, the angle steel passes through bolt gallows, install actuating mechanism between the inner wall of gallows, actuating mechanism connects the expansion bracket.

An embodiment of preferred, the crane includes the sliding frame, the equal fixed mounting sliding frame in both ends top of gallows, the inner chamber middle part of sliding frame rotates the installation pulley, two the equal fixed mounting deflector in one side outer wall both sides that the sliding frame kept away from mutually, the outer wall of deflector slip laminating stand, the equal fixed mounting fixed plate of sliding frame inner wall of pulley top and bottom, rotate the installation gyro wheel through the round pin axle on the fixed plate, the gyro wheel rotates and runs through one side outer wall that the sliding frame kept away from mutually, and the gyro wheel slides the laminating stand.

In a preferred embodiment, the distance between the guide plates is equal to the width of the upright posts, the distance between the rollers on the two sliding frames is equal to the distance between the two upright posts, and the cross section of each pulley is in an I-shaped structure.

Preferably, the telescopic frame comprises a fixed bearing groove and a towing object bearing groove, welding angle steel is fixed on the outer walls of two ends of the fixed bearing groove, the towing object bearing groove is positioned right above the fixed bearing groove, a main clamping plate and an auxiliary clamping plate are arranged between the inner cavities of the fixed bearing groove and the towing object bearing groove, the outer walls of one sides of the main clamping plate and the auxiliary clamping plate are tightly attached, two sliding grooves are formed in the outer walls of the sides far away from the main clamping plate and the auxiliary clamping plate, a countersunk bolt is sleeved on the inner wall of the sliding groove of the auxiliary clamping plate and penetrates through the auxiliary clamping plate and is bolted with the main clamping plate, short shafts are sleeved on the outer walls of two sides of the fixed bearing groove and the towing object bearing groove, one ends of the short shafts, close to the outer walls of the fixed bearing groove and the towing object bearing groove, are provided with locking nuts through thread structures, the other ends of the short shafts are rotatably clamped with guide wheels, and the guide wheels are slidably clamped in the sliding grooves, the bottom surface of the fixed bearing groove is fixedly provided with a transmission case, and a telescopic assembly is arranged among the transmission case, the fixed bearing groove, the towing bearing groove and the main clamping plate and connected with a driving mechanism.

In a preferred embodiment, the fixed bearing groove and the trailer bearing groove are U-shaped steel grooves with the same size, the openings of the fixed bearing groove and the trailer bearing groove are opposite, and the diameter and the width of the guide wheel are respectively equal to the height and the width of the sliding groove.

An embodiment of preferred, flexible subassembly includes the driven shaft, the middle part of transmission case rotates and cup joints the driven shaft, fixed cup joints first gear on the driven shaft, the first rack of bottom fixed mounting of main board, first gear revolve runs through fixed bearing groove and meshes first rack, the turn trough has been opened at the middle part of main board, the second gear of turn trough internal rotation joint, the fixed welding second rack in inner chamber bottom in fixed bearing groove, the fixed welding third rack in inner chamber top in trailer bearing groove, second rack and third rack mesh respectively at the bottom and the top of second gear.

In a preferred embodiment, the driven shaft and the rotary groove are respectively located at the middle points of the fixed bearing groove and the main clamping plate in the length direction, and the lengths of the first rack, the second rack and the third rack are equal to the length of the fixed bearing groove.

An embodiment of preferred, actuating mechanism includes first support, the first support of inner wall middle part fixed mounting of gallows, fixed mounting second support between the gallows inner wall of first support both sides, the equal fixed mounting bearing frame in one end top of second support, rotate between the bearing frame and cup joint the main shaft, the both ends of main shaft rotate respectively to cup joint on the transmission case of two expansion bracket bottoms, fixed mounting motor and reduction gear on the first support, the output shaft fixed connection reduction gear's of motor input shaft, installation matched with drive chain and sprocket between the output shaft of reduction gear and the main shaft, matched with drive chain and sprocket are installed to the branch between the driven shaft in both ends of main shaft and two transmission cases.

The utility model has the beneficial effects that:

1. the vertical column is arranged between two rows of three-dimensional warehouse goods shelves, a twisted rope of the winch equipment passes through the pulley, the twisted rope is wound and discharged to drive the sliding frame to lift along the vertical column, when the vertical column is lifted, the guide plate is guided and limited, the roller wheel is attached to the vertical column to roll, friction is reduced, and the vertical column is convenient to lift;

2. the fixed bearing groove is fixed on the hanger, the dragging object bearing groove, the main clamping plate, the auxiliary clamping plate and the fixed bearing groove are vertically and stably supported through vertical limiting of the sliding groove and the guide wheel, meanwhile, the main clamping plate and the auxiliary clamping plate can slide in the fixed bearing groove, the dragging object bearing groove can slide on the main clamping plate and the auxiliary clamping plate, two-stage expansion is achieved, when goods are supported on the dragging object bearing groove or even a goods shelf, the supporting area is increased through the main clamping plate and the auxiliary clamping plate, and the weighing stability is improved;

3. the motor passes through the reduction gear and slows down, drive the slow rotation of main shaft through driving chain and sprocket, the main shaft passes through driving chain and sprocket and drives the driven shaft and rotate, then first gear synchronous rotation in two expansion brackets, first gear drives the punch holder through first rack and slides along fixed bearing inslot, promote the second gear and roll along the second rack when the punch holder slides, then the second gear rolls and drives the third rack and slide, thereby make the tow bearing groove can slide on punch holder and subplate, it is flexible to form the two-stage, then during the bearing, punch holder and subplate are between fixed bearing groove and tow bearing groove, increase bearing area, it is flexible more stable.

Drawings

Fig. 1 is a schematic structural diagram of a basket assembly for an intelligent three-dimensional garage according to an embodiment of the present invention.

FIG. 2 is an enlarged schematic view of the point A in FIG. 1 according to the present invention.

FIG. 3 is a schematic cross-sectional view of the telescopic frame of the present invention.

FIG. 4 is an enlarged view of the structure at B in FIG. 3 according to the present invention.

Fig. 5 is a schematic view of the storage and lifting frame structure of the present invention.

In the figure: 1. a hanger; 2. a telescopic frame; 21. fixing a bearing groove; 22. a trailer load bearing groove; 23. a transmission case; 24. a main clamping plate; 25. an auxiliary splint; 26. a chute; 27. a short axis; 28. a guide wheel; 29. a telescoping assembly; 291. a first gear; 292. a first rack; 293. rotating the groove; 294. a second gear; 295. a second rack; 296. a third rack; 3. angle steel; 4. a drive mechanism; 41. a first bracket; 42. a second bracket; 43. a bearing seat; 44. a main shaft; 45. a motor; 46. a speed reducer; 47. a driven shaft; 5. a lifting frame; 51. a sliding frame; 52. a pulley; 53. a guide plate; 54. a fixing plate; 55. a roller; 6. and (7) a vertical column.

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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The embodiment is as follows: as shown in fig. 1 to 5, the utility model provides a hanging basket assembly for an intelligent three-dimensional warehouse, which comprises a hanging bracket 1 and an upright post 6, wherein lifting frames 5 are fixedly installed at the tops of two ends of the hanging bracket 1, the lifting frames 5 are slidably clamped on the upright post 6, two expansion brackets 2 are arranged on the top surface of the hanging bracket 1, angle steels 3 are fixedly welded on the outer walls of the two ends of the expansion brackets 2, the angle steels 3 are bolted to the hanging bracket 1 through bolts, a driving mechanism 4 is installed between the inner walls of the hanging bracket 1, and the driving mechanism 4 is connected with the expansion brackets 2. The stand 6 is installed between two rows of three-dimensional storehouse goods shelves, and crane 5 goes up and down along stand 6 under capstan winch equipment and hank rope drive to make gallows 1 go up and down to the goods shelf and correspond the height, actuating mechanism 4 drives the expansion bracket 2 and slides, makes expansion bracket 2 can stretch out to 1 both sides of gallows, thereby holds in the palm the goods on the goods shelves to gallows 1 on, is convenient for carry out the goods to high altitude goods shelves and gets and put, and it is convenient to use.

Further, the lifting frame 5 comprises sliding frames 51, the sliding frames 51 are fixedly mounted at the tops of two ends of the lifting frame 1, pulleys 52 are rotatably mounted in the middle of an inner cavity of each sliding frame 51, guide plates 53 are fixedly mounted on two sides of the outer wall of one side, away from each other, of the two sliding frames 51, the guide plates 53 are in sliding fit with the outer wall of the upright post 6, fixing plates 54 are fixedly mounted on the inner walls of the sliding frames 51 at the top and the bottom of each pulley 52, rollers 55 are rotatably mounted on the fixing plates 54 through pin shafts, the rollers 55 rotate to penetrate through the outer wall of one side, away from each sliding frame 51, the rollers 55 are in sliding fit with the upright post 6, the distance between the rollers 55 on the two sliding frames 51 is equal to the distance between the two upright posts 6, the cross section of each pulley 52 is in an I-shaped structure, a stranded rope of a winch device penetrates through the pulleys 52, the stranded rope is wound and discharged to drive the sliding frames 51 to lift along the upright posts 6, when lifting, the guide plate 53 guides and limits, the roller 55 is attached to the upright post 6 to roll, friction is reduced, and lifting is facilitated.

The telescopic frame 2 comprises a fixed bearing groove 21 and a towing object bearing groove 22, welding angle steel 3 is fixed on the outer walls of two ends of the fixed bearing groove 21, the towing object bearing groove 22 is positioned right above the fixed bearing groove 21, a main clamping plate 24 and an auxiliary clamping plate 25 are arranged between the inner cavities of the fixed bearing groove 21 and the towing object bearing groove 22, the outer walls of one sides of the main clamping plate 24 and the auxiliary clamping plate 25 are tightly attached, two sliding grooves 26 are formed in the outer walls of one sides, far away from the main clamping plate 24 and the auxiliary clamping plate 25, countersunk head bolts are sleeved on the inner walls of the sliding grooves 26 of the auxiliary clamping plate 25 and penetrate through the auxiliary clamping plate 25 and are bolted with the main clamping plate 24, short shafts 27 are sleeved on the outer walls of two sides of the fixed bearing groove 21 and the towing object bearing groove 22, locking nuts are mounted on one ends, close to the outer walls of the fixed bearing groove 21 and the towing object bearing groove 22, of the short shafts 27 through threaded structures, the other ends of the short shafts 27 rotate to clamp guide wheels 28 and are slidably clamped in the sliding grooves 26, the transmission case 23 is fixedly installed on the bottom surface of the fixed bearing groove 21, the telescopic assembly 29 is installed between the transmission case 23, the fixed bearing groove 21, the tow bearing groove 22 and the main clamp plate 24, the telescopic assembly 29 is connected with the driving mechanism 4, the fixed bearing groove 21 and the tow bearing groove 22 are U-shaped steel grooves with the same size, the openings of the fixed bearing groove 21 and the tow bearing groove 22 are opposite, the diameter and the width of the guide wheel 28 are respectively equal to the height and the width of the sliding groove 26, the fixed bearing groove 21 is fixed on the hanger 1, the tow bearing groove 22, the main clamp plate 24, the auxiliary clamp plate 25 and the fixed bearing groove 21 are kept vertically and stably supported through the vertical spacing of the sliding groove 26 and the guide wheel 28, meanwhile, the main clamp plate 24 and the auxiliary clamp plate 25 can slide in the fixed bearing groove 21, the tow bearing groove 22 can slide on the main clamp plate 24 and the auxiliary clamp plate 25 to realize two-stage telescopic, and even when goods are supported on the tow bearing groove 22, the main clamping plate 24 and the auxiliary clamping plate 25 increase the supporting area and improve the weighing stability.

Further, the telescopic assembly 29 includes a driven shaft 47, the driven shaft 47 is rotatably sleeved in the middle of the transmission case 23, a first gear 291 is fixedly sleeved on the driven shaft 47, a first rack 292 is fixedly installed at the bottom of the main plate 24, the first gear 291 rotatably penetrates through the fixed bearing groove 21 and engages with the first rack 292, a rotating groove 293 is formed in the middle of the main plate 24, a second gear 294 is rotatably engaged in the rotating groove 293, a second rack 295 is fixedly welded to the bottom of an inner cavity of the fixed bearing groove 21, a third rack 296 is fixedly welded to the top of an inner cavity of the trailer bearing groove 22, the second rack 295 and the third rack 296 are respectively engaged with the bottom and the top of the second gear 294, the driven shaft 47 and the rotating groove 293 are respectively located at the middle points of the fixed bearing groove 21 and the main plate 24 in the length direction, the lengths of the first rack 292, the second rack 295 and the third rack 296 are equal to the length of the fixed bearing groove 21, the driving mechanism 4 includes a first bracket 41, a first support 41 is fixedly installed in the middle of the inner wall of the hanger 1, a second support 42 is fixedly installed between the inner walls of the hanger 1 at the two sides of the first support 41, a bearing seat 43 is fixedly installed at the top of one end of the second support 42, a spindle 44 is rotatably sleeved between the bearing seats 43, two ends of the spindle 44 are respectively rotatably sleeved on the transmission boxes 23 at the bottoms of the two telescopic frames 2, a motor 45 and a reducer 46 are fixedly installed on the first support 41, an output shaft of the motor 45 is fixedly connected with an input shaft of the reducer 46, a transmission chain and a sprocket matched with each other are installed between an output shaft of the reducer 46 and the spindle 44, a transmission chain and a sprocket matched with each other are respectively installed between two ends of the spindle 44 and driven shafts 47 in the two transmission boxes 23, the motor 45 is decelerated by the reducer 46, the spindle 44 is driven by the transmission chain and sprocket to rotate slowly, the spindle 44 drives the driven shafts 47 to rotate by the transmission chain and sprocket, so that first gears 291 in the two telescopic frames 2 rotate synchronously, the first gear 291 drives the main plate 24 to slide along the fixed bearing groove 21 through the first rack 292, the main plate 24 pushes the second gear 294 to roll along the second rack 295 when sliding, and then the second gear 294 rolls to drive the third rack 296 to slide, so that the mop bearing groove 22 can slide on the main plate 24 and the auxiliary plate 25, two-stage extension and retraction are formed, and when bearing is performed, the main plate 24 and the auxiliary plate 25 are arranged between the fixed bearing groove 21 and the mop bearing groove 22, the bearing area is increased, and the bearing capacity is improved.

When the device is used, the upright post 6 is arranged between two rows of three-dimensional warehouse goods shelves, the stranded rope of the winch device passes through the pulley 52, the stranded rope is wound and discharged to drive the sliding frame 51 to lift along the upright post 6, during lifting, the guide plate 53 is used for guiding and limiting, the roller 55 is attached to the upright post 6 to roll, friction is reduced, and lifting is convenient, when the hanger 1 is lifted to a goods position, the fixed bearing groove 21 is fixed on the hanger 1, the main plate 24, the auxiliary plate 25 and the fixed bearing groove 21 keep vertical stable support through the vertical limiting of the sliding groove 26 and the guide wheel 28, meanwhile, the main plate 24 and the auxiliary plate 25 can slide in the fixed bearing groove 21, the motor 45 is decelerated through the speed reducer 46, the main shaft 44 is driven to rotate slowly through the transmission chain and the chain wheel, the main shaft 44 drives the driven shaft 47 to rotate through the transmission chain and the chain wheel, the first gears 291 in the two telescopic frames 2 synchronously rotate, the first gear 291 drives the main plate 24 to slide along the fixed bearing groove 21 through the first rack 292, promote second gear 294 and roll along second rack 295 when the main board 24 slides, then second gear 294 rolls and drives third rack 296 and slide to make the thing bearing groove 22 that drags slide on main board 24 and auxiliary splint 25, it is flexible to form the two-stage, then during the bearing, main board 24 and auxiliary splint 25 are between fixed bearing groove 21 and thing bearing groove 22 that drags, increase bearing area, improve bearing capacity, be applicable to the three-dimensional storehouse goods of intelligence and get and put.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hanging flower basket subassembly for three-dimensional storehouse of intelligence, includes gallows (1) and stand (6), its characterized in that: the crane is characterized in that the crane is fixedly installed at the tops of the two ends of the hanger (1) and fixedly installed with the crane (5), the crane (5) is connected with the stand column (6) in a sliding mode, the top surface of the hanger (1) is provided with two expansion brackets (2), welding angle steel (3) is fixedly arranged on the outer walls of the two ends of each expansion bracket (2), the angle steel (3) is bolted to the hanger (1) through bolts, a driving mechanism (4) is installed between the inner walls of the hanger (1), and the expansion brackets (2) are connected with the driving mechanism (4).

2. The basket assembly for the intelligent three-dimensional garage as claimed in claim 1, wherein: crane (5) are including sliding frame (51), the equal fixed mounting sliding frame (51) in both ends top of gallows (1), the inner chamber middle part of sliding frame (51) rotates installation pulley (52), two the equal fixed mounting deflector (53) in one side outer wall both sides that sliding frame (51) kept away from mutually, the outer wall of deflector (53) sliding fit stand (6), the equal fixed mounting fixed plate (54) of sliding frame (51) inner wall at pulley (52) top and bottom, rotate installation gyro wheel (55) through the round pin axle on fixed plate (54), gyro wheel (55) rotate and run through one side outer wall that sliding frame (51) kept away from mutually, and gyro wheel (55) sliding fit stand (6).

3. The basket assembly for the intelligent three-dimensional garage as claimed in claim 2, wherein: the distance between the guide plates (53) is equal to the width of the upright posts (6), the distance between the rollers (55) on the two sliding frames (51) is equal to the distance between the two upright posts (6), and the cross section of each pulley (52) is of an I-shaped structure.

4. The hanging basket assembly for the intelligent stereo garage according to claim 1, wherein: expansion bracket (2) are including fixed bearing groove (21) and tow thing bearing groove (22), equal fixed welding angle steel (3) of both ends outer wall in fixed bearing groove (21), tow thing bearing groove (22) are located fixed bearing groove (21) directly over, be equipped with main splint (24) and vice splint (25) between the inner chamber in fixed bearing groove (21) and tow thing bearing groove (22), one side outer wall of main splint (24) and vice splint (25) closely laminates, two spout (26) have all been opened to one side outer wall that main splint (24) and vice splint (25) kept away from mutually, spout (26) inner wall of vice splint (25) cup joints countersunk head bolt, and countersunk head bolt runs through vice splint (25) and bolted connection main splint (24), the equal minor axis (27) of both sides outer wall in fixed bearing groove (21) and tow thing bearing groove (22), the minor axis (27) are close to the one end in fixed bearing groove (21) and the outer wall of tow thing bearing groove (22) and are passed through bearing groove (27), the one end that minor axis (27) are close to fixed bearing groove (21) and tow thing bearing groove (22) is close to fixed bearing groove (21) Screw thread structure installation lock nut, joint leading wheel (28) are rotated to the other end of minor axis (27), leading wheel (28) slip joint is in spout (26), bottom surface fixed mounting transmission case (23) of fixed bearing groove (21), install flexible subassembly (29) between transmission case (23), fixed bearing groove (21), tow bearing groove (22) and main splint (24), actuating mechanism (4) is connected in flexible subassembly (29).

5. The hanging basket assembly for the intelligent three-dimensional garage as claimed in claim 4, wherein: the fixed bearing groove (21) and the tow bearing groove (22) are U-shaped steel grooves with the same size, openings of the fixed bearing groove (21) and the tow bearing groove (22) are opposite, and the diameter and the width of the guide wheel (28) are respectively equal to the height and the width of the sliding groove (26).

6. The hanging basket assembly for the intelligent three-dimensional garage as claimed in claim 4, wherein: the telescopic assembly (29) comprises a driven shaft (47), the middle of the transmission box (23) is rotated to be sleeved with the driven shaft (47), a first gear (291) is fixedly sleeved on the driven shaft (47), a first rack (292) is fixedly installed at the bottom of the main clamping plate (24), the first gear (291) is rotated to penetrate through a fixed bearing groove (21) and is meshed with the first rack (292), a rotating groove (293) is formed in the middle of the main clamping plate (24), a clamping second gear (294) is rotatably arranged in the rotating groove (293), a second rack (295) is fixedly welded at the bottom of an inner cavity of the fixed bearing groove (21), a third rack (296) is fixedly welded at the top of the inner cavity of the drag bearing groove (22), and the second rack (296) and the third rack (296) are respectively meshed with the bottom and the top of the second gear (294).

7. The hanging basket assembly for the intelligent stereo garage according to claim 6, wherein: the driven shaft (47) and the rotary groove (293) are respectively positioned at the middle points of the fixed bearing groove (21) and the main clamping plate (24) in the length direction, and the lengths of the first rack (292), the second rack (295) and the third rack (296) are equal to the length of the fixed bearing groove (21).

8. The hanging basket assembly for the intelligent three-dimensional garage as claimed in claim 6, wherein: the driving mechanism (4) comprises a first bracket (41), the first bracket (41) is fixedly arranged in the middle of the inner wall of the hanger (1), a second bracket (42) is fixedly arranged between the inner walls of the hanging brackets (1) at the two sides of the first bracket (41), bearing blocks (43) are fixedly arranged at the top of one end of the second bracket (42), a main shaft (44) is rotatably sleeved among the bearing blocks (43), two ends of the main shaft (44) are respectively rotatably sleeved on the transmission boxes (23) at the bottoms of the two telescopic frames (2), a motor (45) and a speed reducer (46) are fixedly arranged on the first bracket (41), the output shaft of the motor (45) is fixedly connected with the input shaft of the speed reducer (46), a transmission chain and a chain wheel which are matched with each other are arranged between an output shaft of the speed reducer (46) and the main shaft (44), and transmission chains and chain wheels which are matched with the driven shafts (47) in the two transmission boxes (23) are installed at two ends of the main shaft (44) in a distributed mode.