CN214161901U

CN214161901U - Unloader on photovoltaic support welding bench

Info

Publication number: CN214161901U
Application number: CN202022713722.5U
Authority: CN
Inventors: 王策
Original assignee: Tianjin Baojing New Energy Technology Co ltd
Current assignee: Tianjin Baojing New Energy Technology Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-09-10
Anticipated expiration: 2030-11-19

Abstract

The utility model discloses a photovoltaic support welding table feeding and discharging device, which relates to the technical field of photovoltaic support production equipment and comprises a welding table, wherein a support is fixed on one side of the welding table, a material placing frame is arranged on the upper part of the support in a sliding manner, a lifting mechanism for driving the material placing frame to lift is arranged on the support, a material feeding frame is arranged on the upper part of the support in a downward inclining manner, two baffles are arranged on the material feeding frame, a first rotating shaft is arranged on the material feeding frame in a rotating manner, and two first shifting plates are fixed on the first rotating shaft; a feeding frame which is inclined upwards is fixed at the lower part of the bracket; the blanking frame is rotatably provided with a second rotating shaft, two second shifting plates are fixed on the second rotating shaft, two grooves are formed in the positions, corresponding to the two second shifting plates, of the welding table, a second motor fixedly connected with the second rotating shaft is fixed on the blanking frame, a synchronizing mechanism is connected between the second rotating shaft and the first rotating shaft in a transmission mode, and a finished vehicle is arranged in the support. The utility model provides a use reliable, efficient and can go up unloader on photovoltaic support welding bench of unloading in step.

Description

Unloader on photovoltaic support welding bench

Technical Field

The utility model relates to a photovoltaic support production facility technical field especially relates to a unloader on photovoltaic support welding bench.

Background

A solar photovoltaic bracket is a special bracket designed for placing, installing and fixing a solar panel in a solar photovoltaic power generation system. High-abrasion-resistance materials are generally adopted to resist wind and snow loads and other corrosion effects, the materials generally comprise aluminum alloy, carbon steel and stainless steel, and accessories are generally required to be welded on a steel pipe in the process of producing the photovoltaic bracket.

The current chinese utility model patent that authorizes bulletin number is CN207447669U discloses a solar photovoltaic support production welding mechanism safe in utilization, including the base, the spout has been seted up to the left surface top of base, and the inner chamber movable mounting of spout has the round bar, and the surface of round bar has cup jointed and is located the left riser of base, and the right fixed surface of riser installs the pulley that is connected with the base, and the surface of round bar has cup jointed and is located the left board of placing of riser, and the right fixed surface of placing the board installs the first down tube that is located round bar the place ahead.

By adopting the technical scheme, when the welding machine works, a worker places the steel pipe to be welded on the placing plate to perform automatic welding operation; however, due to the adoption of the mode, the feeding and discharging are carried out manually, the labor intensity of workers is high, and meanwhile, the feeding is carried out after the feeding is finished every time, so that the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a photovoltaic support welding table feeding and discharging device, when welding is completed, a second motor drives a second rotating shaft to rotate, a second shifting plate pushes a steel pipe on a welding table to a feeding frame, a synchronization mechanism drives a first rotating shaft to rotate, and a first rotating shaft is driven to push a first shifting plate to the welding table, so that automatic and synchronous feeding and discharging operations are completed; through this kind of mode, reduce staff intensity of labour, improve production efficiency.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a support is fixed on one side of the welding table in the width direction, a material placing frame is arranged on the upper portion of the support in a sliding mode, a lifting mechanism for driving the material placing frame to lift is arranged on the support, a material loading frame is arranged on one side, close to the welding table, of the support in a downward inclined mode, two baffles are arranged on the material loading frame, a first rotating shaft is rotatably arranged at one end, close to the welding table, of the material loading frame, and two first shifting plates are fixed on the first rotating shaft;

a feeding frame which is inclined upwards is fixed on the bracket below the feeding frame; one side of the blanking frame, which is far away from the support, is rotatably provided with a second rotating shaft, two second shifting plates are fixed on the second rotating shaft, two grooves are formed in the welding table corresponding to the two second shifting plates, a second motor with an extending end fixedly connected with the second rotating shaft is fixed on one side of the blanking frame in the width direction, a synchronizing mechanism is connected between the second rotating shaft and the first rotating shaft in a transmission mode, and a finished vehicle is arranged in the support below the blanking frame.

By adopting the technical scheme, when welding is completed, the second motor works to drive the second rotating shaft to rotate from the lower part of the welding table, the second shifting plate pushes the steel pipe welded on the welding table to the blanking frame, and the blanking frame guides the welded steel pipe to the finished product vehicle; simultaneously, first pivot is rotated from last work or material rest below under lazytongs's drive, and first group board waits to weld the steel pipe propelling movement to the welding bench with what the dog was located to the unloading operation in step of automatic completion welding bench, through this kind of mode, reduce staff intensity of labour, improve production efficiency.

The utility model discloses further set up to: and a shear type lifter is fixed in the finished vehicle, and a supporting plate is fixed at the upper part of the shear type lifter.

Through adopting above-mentioned technical scheme, drive the layer board through cutting formula lift and go up and down to make the welded steel pipe drop the difference in height reduce, prevent that the steel pipe from producing when dropping from the unloading frame and damaging, through this kind of mode, improve the reliability that the device used.

The utility model discloses further set up as the finished product car includes the short riser, the short riser is fixed to be set up in the finished product car near one side of blanking frame, the finished product car is kept away from one side of blanking frame and is fixed with long riser, the support is kept away from the middle part of blanking frame one side and is fixed with the crossbeam, be provided with the locking mechanism who is used for locking the finished product car on the crossbeam; the locking mechanism comprises two fixing plates, the two fixing plates are fixedly arranged on the lower portion of the cross beam, two push blocks are arranged on the lower surface of the cross beam in a sliding mode, a first elastic assembly is fixed between the push blocks and the fixing plates, locking pins are arranged on the cross beam in a sliding mode and correspond to the two push blocks, each locking pin comprises a vertical portion and a horizontal portion, a second elastic assembly is fixed between the vertical portion and the corresponding portion of the cross beam, the horizontal portion penetrates through one side wall of the cross beam in the width direction of the support, and locking grooves matched with the vertical portions in a plug-in mode are formed in the upper surface of the long vertical plate.

Through adopting above-mentioned technical scheme, the during operation, short riser pass locking mechanism get into inside the support, and long riser is close to the lateral wall and the ejector pad butt of fixed plate to promote two ejector pads and remove to the fixed plate, the fitting pin pops out and inserts the locking inslot from the crossbeam is inside this moment, thereby accomplishes the fixed operation of finished product car, when the finished product car shifts, only needs to upwards mention the fitting pin and can accomplish, through this kind of mode, reliability and convenience that the improvement device used.

The utility model discloses further set up to: two the baffle all slides along last work or material rest length direction and sets up.

Through adopting above-mentioned technical scheme, utilize two baffles that slide and set up, can carry on spacingly to the steel pipe of different length to improve the suitability that the device used.

The utility model discloses further set up to: the side, close to the support, of the blanking frame is symmetrically provided with two aligning conveyor belts along the length direction of the blanking frame, and the two aligning conveyor belts are arranged in an inwards inclined mode from the side, close to the second rotating shaft, to the side, close to the support, along the width direction of the support.

Through adopting above-mentioned technical scheme, utilize two alignment conveyer belts to carry out spacingly to the steel pipe that has welded to ensure its regularity on the finished product car as far as possible, prevent to pile up the possibility that the in-process collapses at the unloading, further improve the reliability that the device used.

The utility model discloses further set up to: the material discharging frame is provided with two sliding seats in a sliding mode along the length direction of the material discharging frame, second screw rods in threaded connection with the two second sliding seats respectively are arranged on the material discharging frame in a rotating mode, a hand wheel is fixed to one end of each second screw rod, and the two aligning conveyor belts are fixedly arranged on the two sliding seats respectively.

By adopting the technical scheme, the hand wheel and the second screw rod are utilized to adjust the two sliding seats to move towards opposite directions or opposite directions so as to adjust the distance between the two aligned conveying belts, so that the device is suitable for blanking of steel pipes with different lengths, and the use applicability of the device is further improved.

The utility model discloses further set up to: the synchronous mechanism comprises a first chain wheel and a second chain wheel, the first chain wheel is fixedly arranged on a second rotating shaft, the second chain wheel is rotatably arranged on the feeding frame, a chain is arranged between the first chain wheel and the second chain wheel in a transmission mode, a first gear is coaxially fixed on one side of the second chain wheel, and a second gear meshed with the first gear is fixed on the first rotating shaft.

Through adopting above-mentioned technical scheme, the during operation, first sprocket passes through chain drive with the power of second pivot to the second sprocket on, the second sprocket passes through first gear and second gear engagement, drives first pivot and the reverse synchronous rotation of second pivot to accomplish simultaneously and go up the unloading operation, through this kind of mode, can further reduce the interval time of going up unloading, improve production efficiency.

The utility model discloses further set up to: the lifting mechanism comprises a first motor, the first motor is fixedly arranged at the top of the support, a first screw rod rotatably connected with the support is fixed at the extending end of the first motor, and the first screw rod is in threaded connection with the material placing frame.

Through adopting above-mentioned technical scheme, utilize first motor and first screw drive to put the work or material rest and rise to make the multilayer on putting the work or material rest treat that welded steel pipe one side rolls on dropping to the work or material rest, reduce material loading as far as possible and criticize, further improve production efficiency.

To sum up, the utility model discloses a beneficial technological effect does:

(1) the second motor drives the second rotating shaft to rotate, the second shifting plate pushes the steel pipe on the welding table to the blanking frame, the synchronizing mechanism drives the first rotating shaft and the second rotating shaft to reversely and synchronously rotate, and drives the first rotating shaft to push the first shifting plate to the welding table, so that automatic and synchronous feeding and blanking operations are completed; thereby reducing the labor intensity of workers and improving the production efficiency;

(2) the locking mechanism, the lifting support plate and the like are utilized, so that the problem of damage or deviation of a finished product vehicle during blanking of the steel pipe is solved, and the device has high reliability;

(3) the baffle and the sliding seat which are arranged in a sliding mode are utilized, so that the device can adapt to blanking operations of steel pipes with different lengths, and the device has high applicability.

Drawings

Fig. 1 is an axial view of the overall structure of an embodiment of the present invention;

fig. 2 is an axial view of a bracket portion according to an embodiment of the present invention, showing the relationship between a feeding frame and a discharging frame;

FIG. 3 is a schematic sectional view taken along line A-A of FIG. 1, showing the positional relationship of the locking mechanism and the bracket;

FIG. 4 is an enlarged partial schematic view of portion B of FIG. 2, showing the structure of the synchronization mechanism;

fig. 5 is an axis measuring view of a finished vehicle according to an embodiment of the present invention, showing the structure of the finished vehicle;

fig. 6 is a partially enlarged schematic view of a portion C in fig. 3, showing a locking mechanism structure.

Reference numerals: 1. a welding table; 101. a groove; 2. a support; 201. a cross beam; 3. a material placing frame; 4. a lifting mechanism; 401. a first motor; 402. a first screw; 5. a feeding frame; 6. a baffle plate; 7. a first rotating shaft; 8. a first dial plate; 9. A blanking frame; 10. a second rotating shaft; 11. a second dial plate; 12. a second motor; 13. a synchronization mechanism; 1301. a first sprocket; 1302. a second sprocket; 1303. a chain; 1304. a first gear; 1305. a second gear; 14. a sliding seat; 15. a second screw; 16. a hand wheel; 17. aligning the conveyor belt; 18. finished product turning; 1801. a short vertical plate; 1802. a long vertical plate; 18021, locking groove; 1803. a scissor lift; 1804. a support plate; 19. a locking mechanism; 1901. a fixing plate; 1902. a push block; 1903. a first elastic member; 1904. a locking pin; 19041. a vertical portion; 19042. a horizontal portion; 1905. a second elastic component.

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying examples.

Referring to fig. 1 and 2, a unloader on photovoltaic support welding bench, including welding bench 1, welding bench 1 is cuboid frame construction, welding bench 1 is fixed with support 2 along its width direction one side, support 2 is cuboid frame construction, 2 upper portions of support slide along its direction of height and are provided with and put work or material rest 3, it is cuboid platelike structure to put work or material rest 3, it keeps away from welding bench 1 one side from support 2 to support 2 from 3 bottom surfaces of the work or material rest and is close to 1 one side downward sloping setting of welding bench, be provided with the elevating system 4 that the drive was put work or material rest 3 and goes up and down on the support 2, elevating system 4 includes first motor 401, first motor 401 is fixed to set up the top that one side of welding bench 1 was kept away from along its length direction circle to support 2, first motor 401 stretches out the end downwards and is fixed with support 2 rotation connection's first screw rod 402, first screw rod 402 with put 3 threaded connection of work or material rest.

2 upper portions of support 2 are close to fixed being provided with work or material rest 5 in welding bench 1 one side, it is cuboid frame construction to go up work or material rest 5, it sets up to its direction downward sloping of keeping away from support 2 from its and 2 fixed places to go up work or material rest 5 upper surface, it slides along its length direction and is provided with two baffles 6 to go up the work or material rest 5, it is provided with first pivot 7 to go up the rotation of work or material rest 5 one end that its width direction is close to welding bench 1, be provided with two first group boards 8 along its axis direction interval on the first pivot 7, two first group boards 8 are in work or material rest 5 below positions.

Go up and to slope on 5 below supports 2 of work or material rest and be provided with down work or material rest 9, down work or material rest 9 is cuboid frame construction, down work or material rest 9 sets up from its and 2 fixed departments tilt up, the one end that support 2 was kept away from along its width direction to lower work or material rest 9 is slightly less than weld bench 1 height, the one end rotation that support 2 was kept away from along its width direction of lower work or material rest 9 is provided with second pivot 10, be provided with two seconds along its axis direction interval on the second pivot 10 and dial board 11, two seconds are dialled board 11 and all are in weld bench 1 mesa below, weld bench 1 corresponds the position shaping that two seconds dialled board 11 and has two confession seconds and dial the recess 101 that board 11 passed, one side of down work or material rest 9 length direction is fixed with the second motor 12 that stretches out the end and link firmly with second pivot 10, the transmission is connected with lazytongs 13 between second pivot 10 and the first pivot 7.

Referring to fig. 2 and 4, the synchronizing mechanism 13 includes a first sprocket 1301 and a second sprocket 1302, the first sprocket 1301 is fixedly disposed at an end of the second shaft 10 away from the second motor 12 along the length direction thereof, the second sprocket 1302 is rotatably disposed at a side of the upper rack 5 along the length direction thereof close to the first sprocket 1301, a chain 1303 is drivingly connected to the first sprocket 1301 and the second sprocket 1302, a first gear 1304 is coaxially fixed at a side of the second sprocket 1302 close to the upper rack 5, a second gear 1305 is fixedly disposed at an end of the first shaft 7 along the length direction thereof close to the first gear 1304, and the second gear 1305 is in meshing engagement with the first gear 1304; during operation, the second motor 12 drives the second shaft 10 to rotate toward the blanking frame 9, the first chain wheel 1301 drives the power of the second shaft 10 to the second chain wheel 1302 through the chain 1303, the second chain wheel 1302 is meshed with the second gear 1305 through the first gear 1304 to drive the first shaft 7 and the second shaft 10 to rotate synchronously and reversely, and therefore synchronous reverse motion of the first shaft 7 and the second shaft 10 is completed.

Two sliding seats 14 are arranged on one side, close to the support 2, of the blanking frame 9, the upper surfaces of the two sliding seats 14 are flush with the upper surface of the blanking frame 9, the two sliding seats 14 are arranged in a sliding mode along the length direction of the blanking frame 9, a second screw 15 in threaded connection with the two second sliding seats 14 is rotatably arranged in the blanking frame 9, the two sliding seats 14 are driven to be close to or far away from each other through forward and reverse rotation of the second screw 15, and one end of the second screw 15 in the length direction extends out of the blanking frame 9 and is fixedly provided with a hand wheel 16; all fixedly provided with on two sliding seat 14 and align conveyer belt 17, two align conveyer belt 17 along the symmetry setting of unloading frame 9 length direction, two align conveyer belt 17 all along the inboard slope setting of one side of unloading frame 9 width direction from keeping away from support 2 towards the one side that is close to support 2.

Referring to fig. 1 and 5, a finished product cart 18 is arranged inside a support 2 below a material placing frame 3, the finished product cart 18 is of a rectangular frame structure, the finished product cart 18 comprises a short vertical plate 1801 and a long vertical plate 1802, the short vertical plate 1801 is fixedly arranged on one side, close to a material placing frame 9, of the finished product cart 18 along the width direction of the finished product cart, the long vertical plate 1802 is fixedly arranged on one side, far away from the material placing frame 9, of the finished product cart 18 along the width direction of the finished product cart, a scissor type lifter 1803 is fixedly arranged on the bottom surface inside the finished product cart 18, and a supporting plate 1804 is fixedly arranged on the upper portion of the scissor type lifter 1803.

Referring to fig. 3 and fig. 6, a cross beam 201 is fixedly arranged in the middle of a support 2, the cross beam 201 is provided with a locking mechanism 19 for locking a finished vehicle 18, the locking mechanism 19 includes two fixing plates 1901, the two fixing plates 1901 are fixedly arranged on the lower surface of the cross beam 201 on one side close to a blanking rack 9 along the width direction of the support 2, a short vertical plate 1801 can pass through the lower side of the two fixing plates 1901, the lower surface of the cross beam 201 is provided with two push blocks 1902 in a sliding manner along the width direction of the support 2, a first elastic assembly 1903 is fixed between the two push blocks 1902 and the fixing plate 1901, and the first elastic assembly 1903 is made of a spring; the inside two ejector pads 1902 positions that correspond of crossbeam 201 are provided with two check pins 1904 along support 2 direction of height that slides, check pin 1904 is T font structure, check pin 1904 includes vertical portion 19041 and horizontal portion 19042, be fixed with second elastic component 1905 between vertical portion 19041 upper portion and the crossbeam 201 is inside, second elastic component 1905 is made for the spring, horizontal portion 19042 stretches out a lateral wall that the width direction of crossbeam 201 kept away from lower carriage 2, long riser 1802 upper surface shaping has two and vertical portion 19041 lower part grafting complex locking groove 18021.

During operation, short riser 1801 passes locking mechanism 19 and gets into inside support 2, the lateral wall that long riser 1802 is close to fixed plate 1901 butts with ejector 1902, and promote two ejector pads 1902 and remove to fixed plate 1901, the vertical part 19041 lower part of fitting pin 1904 pops out from crossbeam 201 is inside and inserts in locking groove 18021 this moment, thereby accomplish the fixed operation of finished product car 18, when finished product car 18 shifts, only need to mention fitting pin 1904 horizontal part 19042 upwards, can outwards stimulate finished product car 18, ejector pad 1902 kick-back blocks the lower part of the vertical part 19041 of fitting pin 1904, thereby accomplish the fixed of retracting of fitting pin 1904.

The working principle of the embodiment is as follows: when welding is finished, the second motor 12 works to drive the second rotating shaft 10 to rotate from the lower part of the welding table 1, the second shifting plate 11 pushes the steel pipes welded on the welding table 1 to the blanking frame 9, and the blanking frame 9 and the two aligning conveyor belts 17 push the welded steel pipes to the supporting plates 1804 of the finished product vehicle 18; simultaneously, first pivot 7 is driven down from last work or material rest 5 the direction of going up and is rotated, and first group board 8 waits to weld the steel pipe propelling movement to welding bench 1 with the dog department to accomplish the synchronous unloading operation of going up of welding bench 1 automatically, through this kind of mode, reduce staff intensity of labour, improve production efficiency.

The above, only do the preferred embodiment of the present invention, not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a unloader on photovoltaic support welding bench, includes welding bench (1), its characterized in that: a support (2) is fixed on one side of the welding table (1) in the width direction, a material placing frame (3) is arranged on the upper portion of the support (2) in a sliding mode, a lifting mechanism (4) for driving the material placing frame (3) to lift is arranged on the support (2), a material feeding frame (5) is arranged on one side, close to the welding table (1), of the support (2) in a downward inclined mode, two baffles (6) are arranged on the material feeding frame (5), a first rotating shaft (7) is rotatably arranged at one end, close to the welding table (1), of the material feeding frame (5), and two first shifting plates (8) are fixed on the first rotating shaft (7);

a feeding frame (9) which is inclined upwards is fixed on the bracket (2) below the feeding frame (5); one side of the lower material rack (9) far away from the support (2) is rotated to be provided with a second rotating shaft (10), two second shifting plates (11) are fixed on the second rotating shaft (10), the welding table (1) is provided with two grooves (101) corresponding to the two second shifting plates (11), one side of the width direction of the lower material rack (9) is fixed with a second motor (12) with an extending end fixedly connected with the second rotating shaft (10), a synchronizing mechanism (13) is connected between the second rotating shaft (10) and the first rotating shaft (7) in a transmission manner, and a finished vehicle (18) is arranged in the support (2) below the material rack (3).

2. The loading and unloading device for the photovoltaic bracket welding table as recited in claim 1, characterized in that: a scissor type lifter (1803) is fixed inside the finished product vehicle (18), and a supporting plate (1804) is fixed on the upper portion of the scissor type lifter (1803).

3. The loading and unloading device for the photovoltaic bracket welding table as recited in claim 2, characterized in that: the finished product vehicle (18) comprises a short vertical plate (1801), the short vertical plate (1801) is fixedly arranged on one side, close to the blanking frame (9), of the finished product vehicle (18), a long vertical plate (1802) is fixed on one side, far away from the blanking frame (9), of the finished product vehicle (18), a cross beam (201) is fixed in the middle of one side, far away from the blanking frame (9), of the support (2), and a locking mechanism (19) used for locking the finished product vehicle (18) is arranged on the cross beam (201); the locking mechanism (19) comprises two fixing plates (1901), the fixing plates (1901) are fixedly arranged on the lower portion of the beam (201), two push blocks (1902) are arranged on the lower surface of the beam (201) in a sliding mode, a first elastic assembly (1903) is fixed between each push block (1902) and the corresponding fixing plate (1901), locking pins (1904) are arranged on the beam (201) in a sliding mode and correspond to the positions of the two push blocks (1902), each locking pin (1904) comprises a vertical portion (19041) and a horizontal portion (19042), a second elastic assembly (1905) is fixed between the vertical portion (19041) and the inside of the beam (201), the horizontal portion (19042) penetrates through the lateral wall of the beam (201) in the width direction of the support (2), and locking grooves (18021) matched with the vertical portion (19041) in an inserting mode are formed in the upper surface of the long vertical plate (1802).

4. The loading and unloading device for the photovoltaic bracket welding table as recited in any one of claims 1 to 3, wherein: the two baffles (6) are arranged in a sliding manner along the length direction of the feeding frame (5).

5. The loading and unloading device for the photovoltaic bracket welding table as recited in claim 4, wherein: the blanking frame (9) is close to one side of the support (2) and is symmetrically provided with two aligning conveyor belts (17) along the length direction of the blanking frame, and the two aligning conveyor belts (17) are arranged in an inward inclined mode from one side close to the second rotating shaft (10) to one side close to the support (2) along the width direction of the support (2).

6. The loading and unloading device for the photovoltaic bracket welding table as recited in claim 5, wherein: the automatic aligning device is characterized in that two sliding seats (14) are arranged on the blanking frame (9) in a sliding mode along the length direction of the blanking frame, second screw rods (15) which are respectively in threaded connection with the two second sliding seats (14) are arranged on the blanking frame (9) in a rotating mode, a hand wheel (16) is fixed to one end of each second screw rod (15), and the two aligning conveyor belts (17) are respectively and fixedly arranged on the two sliding seats (14).

7. The loading and unloading device for the photovoltaic bracket welding table as recited in claim 1, characterized in that: the synchronous mechanism (13) comprises a first chain wheel (1301) and a second chain wheel (1302), the first chain wheel (1301) is fixedly arranged on a second rotating shaft (10), the second chain wheel (1302) is rotatably arranged on an upper material frame (5), a chain (1303) is arranged between the first chain wheel (1301) and the second chain wheel (1302) in a transmission mode, a first gear (1304) is coaxially fixed on one side of the second chain wheel (1302), and a second gear (1305) meshed with the first gear (1304) is fixed on the first rotating shaft (7).

8. The loading and unloading device for the photovoltaic bracket welding table as recited in claim 4, wherein: the lifting mechanism (4) comprises a first motor (401), the first motor (401) is fixedly arranged at the top of the support (2), a first screw (402) rotatably connected with the support (2) is fixed to the extending end of the first motor (401), and the first screw (402) is in threaded connection with the material placing frame (3).