Automatic board collecting device for PCBs

Abstract

The utility model discloses an automatic board collecting device for PCBs, which comprises a feeding mechanism, a lifting bearing mechanism is arranged on one side of the feeding mechanism, a conveying mechanism is arranged below the bearing mechanism, and an adsorption mechanism is arranged above the feeding mechanism and the bearing mechanism. According to the utility model, through the cooperative operation of the feeding mechanism, the adsorption mechanism, the bearing mechanism and the transportation mechanism, the full-automatic process from conveying to collecting of the PCBs is realized, and the transportation mechanism transfers the PCBs in time, so that the collecting efficiency is greatly improved, and the labor cost and the time loss are reduced; through an adjusting assembly on the adsorption mechanism, the position of a vacuum suction cup assembly can be accurately adjusted according to PCBs of different sizes, it is ensured that the PCBs of different sizes can be effectively adsorbed, and the adaptability of equipment to diversified production requirements is enhanced; through universal wheels and foot brakes arranged on the conveying mechanism, after the bearing mechanism is filled with PCBs, the PCBs can be easily transferred to the next process, and convenience and flexibility are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of PCB board production, and specifically relates to an automatic plate collecting device for PCB boards. BACKGROUND

[0002] PCB boards, as indispensable key components in electronic devices, are widely used in many fields such as computers, communications, consumer electronics, automotive electronics, etc., and in the production and manufacturing process thereof, complex and delicate multiple processes are involved, and the plate collecting link of the PCB board is crucial.

[0003] The existing plate collecting mode relies on manual operation, and manual carrying and placing of the PCB board are not only inefficient, but also prone to damage such as collision and scratching of the PCB board due to human negligence, thereby affecting product quality, and different sizes of the PCB board are frequently switched in production, and the existing plate collecting equipment is difficult to quickly and accurately adapt to such diversified needs. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing an automatic plate collecting device for PCB boards to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] An automatic plate collecting device for PCB boards comprises a feeding mechanism, a liftable receiving mechanism is arranged on one side of the feeding mechanism, a conveying mechanism is arranged below the receiving mechanism, an adsorption mechanism is arranged above the feeding mechanism and the receiving mechanism, the receiving mechanism comprises a fixing frame, a first lead screw, a first screw sleeve, a second motor, a first guide rod, a first sliding sleeve, a first connecting plate, a supporting plate and a receiving plate, the fixing frame is fixedly connected to a mounting frame of the adsorption mechanism, the first lead screw is rotatably connected between the upper and lower connecting rods of the fixing frame, one end of the first lead screw is fixedly connected to the output end of the second motor, the second motor is fixedly connected to the fixing frame, the first lead screw is threadedly connected with the first screw sleeve, the two first guide rods are arranged on the two sides of the first lead screw, the first guide rods are fixedly connected between the upper and lower connecting rods of the fixing frame, the first sliding sleeve is slidably connected to the first guide rod, the first connecting plate is fixedly connected to one side of the first screw sleeve and the two first sliding sleeves, a plurality of supporting plates are fixedly connected vertically to the first connecting plate, the plurality of supporting plates are equidistantly arranged, and the receiving plate is fixedly connected to the upper end of the supporting plate.

[0007] As a further scheme of the utility model, the feeding mechanism comprises a feeding support, a driving roller, a first motor, a driven roller and a conveying belt, the driving roller and the driven roller are rotatably connected in the feeding support, one end of the driving roller is fixedly connected to the output end of the first motor, the first motor is fixedly connected to the feeding support, and the conveying belt is sleeved on the driving roller and the driven roller.

[0008] As a further scheme of the utility model: the upper material feeding mechanism is equipped with a guide mechanism, the guide mechanism is composed of two opposite guide assemblies, the guide assembly comprises a screw rod, a guide plate, a rotating disc and a limiting rod, the side plate of the material feeding support is threadedly connected with the screw rod, one end of the screw rod close to the conveying belt is rotatably connected with the guide plate, the other end is fixedly connected with the rotating disc, the two sides of the screw rod are respectively provided with a limiting rod, the limiting rod penetrates through the side plate of the material feeding support and is slidably connected with the same, and one end of the limiting rod close to the conveying belt is fixedly connected with the guide plate.

[0009] As a further scheme of the utility model: the upper material feeding mechanism is equipped with a guide mechanism, the guide mechanism is composed of two opposite guide assemblies, the guide assembly comprises a screw rod, a guide plate, a rotating disc and a limiting rod, the side plate of the material feeding support is threadedly connected with the screw rod, one end of the screw rod close to the conveying belt is rotatably connected with the guide plate, the other end is fixedly connected with the rotating disc, the two sides of the screw rod are respectively provided with a limiting rod, the limiting rod penetrates through the side plate of the material feeding support and is slidably connected with the same, and one end of the limiting rod close to the conveying belt is fixedly connected with the guide plate.

[0010] As a further scheme of the utility model: the upper material feeding mechanism is equipped with a guide mechanism, the guide mechanism is composed of two opposite guide assemblies, the guide assembly comprises a screw rod, a guide plate, a rotating disc and a limiting rod, the side plate of the material feeding support is threadedly connected with the screw rod, one end of the screw rod close to the conveying belt is rotatably connected with the guide plate, the other end is fixedly connected with the rotating disc, the two sides of the screw rod are respectively provided with a limiting rod, the limiting rod penetrates through the side plate of the material feeding support and is slidably connected with the same, and one end of the limiting rod close to the conveying belt is fixedly connected with the guide plate.

[0011] As a further scheme of the utility model: the upper material feeding mechanism is equipped with a guide mechanism, the guide mechanism is composed of two opposite guide assemblies, the guide assembly comprises a screw rod, a guide plate, a rotating disc and a limiting rod, the side plate of the material feeding support is threadedly connected with the screw rod, one end of the screw rod close to the conveying belt is rotatably connected with the guide plate, the other end is fixedly connected with the rotating disc, the two sides of the screw rod are respectively provided with a limiting rod, the limiting rod penetrates through the side plate of the material feeding support and is slidably connected with the same, and one end of the limiting rod close to the conveying belt is fixedly connected with the guide plate.

[0012] As a further scheme of the utility model: the upper material feeding mechanism is equipped with a guide mechanism, the guide mechanism is composed of two opposite guide assemblies, the guide assembly comprises a screw rod, a guide plate, a rotating disc and a limiting rod, the side plate of the material feeding support is threadedly connected with the screw rod, one end of the screw rod close to the conveying belt is rotatably connected with the guide plate, the other end is fixedly connected with the rotating disc, the two sides of the screw rod are respectively provided with a limiting rod, the limiting rod penetrates through the side plate of the material feeding support and is slidably connected with the same, and one end of the limiting rod close to the conveying belt is fixedly connected with the guide plate.

[0013] Compared with the prior art, the automatic PCB collecting device has the advantages that: through the cooperative operation of the feeding mechanism, the adsorption mechanism, the receiving mechanism and the conveying mechanism, the automatic PCB collecting device realizes the full-automatic process from conveying to collecting the PCB, the conveying belt of the feeding mechanism continuously and stably conveys the PCB under the driving of the first motor, the adsorption mechanism accurately adsorbs and places the PCB to the receiving mechanism, the receiving mechanism automatically receives and adjusts the position, the conveying mechanism timely transfers, the collecting efficiency is greatly improved, the labor cost and the time loss are reduced, the position of the vacuum chuck assembly can be accurately adjusted according to the PCB of different sizes through the adjusting assembly on the adsorption mechanism, the different sizes of PCB can be effectively adsorbed, and the adaptability of the equipment to diversified production demands is enhanced, the universal wheel and the foot brake provided by the conveying mechanism are arranged, after the receiving mechanism is filled with the PCB, the receiving mechanism can be easily transferred to the next process, the conveying rod and the supporting plate are staggered, the stability of the PCB in the transfer process is ensured, and the coherence of the whole production process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of an automatic PCB collecting device.

[0015] Figure 2 It is a structural schematic view of a feeding mechanism in the automatic PCB collecting device.

[0016] Figure 3 It is a structural schematic view of a receiving mechanism in the automatic PCB collecting device.

[0017] Figure 4 It is a structural schematic view of an adsorption mechanism in the automatic PCB collecting device.

[0018] Figure 5 It is a structural schematic view of a PCB transfer state of the automatic PCB collecting device.

[0019] In the figure: 1, feeding mechanism; 11, feeding support; 12, driving roller; 13, first motor; 14, driven roller; 15, conveying belt; 2, receiving mechanism; 21, fixed frame; 22, first lead screw; 23, first nut; 24, second motor; 25, first guide rod; 26, first sliding sleeve; 27, first connecting plate; 28, support plate; 29, receiving plate; 3, conveying mechanism; 31, bottom plate; 32, universal wheel; 33, connecting frame; 34, conveying rod; 4, suction mechanism; 41, mounting frame; 42, second lead screw; 43, second nut; 44, third motor; 45, second guide rod; 46, second sliding sleeve; 47, second connecting plate; 48, connecting block; 49, mounting plate; 410, suction cup connecting plate; 411, suction cup; 412, bidirectional lead screw; 413, fourth motor; 414, moving block; 415, third connecting plate; 416, lifting cylinder; 5, guide mechanism; 51, screw; 52, guide plate; 53, turntable; 54, limiting rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Please refer to Figures 1-5 In the embodiments of the utility model, an automatic plate collecting device for a PCB is provided, which comprises a feeding mechanism 1, a receiving mechanism 2 provided on one side of the feeding mechanism 1 and capable of lifting, a conveying mechanism 3 provided below the receiving mechanism 2, and a suction mechanism 4 provided above the feeding mechanism 1 and the receiving mechanism 2. The PCB is transferred from the feeding mechanism 1 to the receiving mechanism 2 by the suction mechanism 4, and the receiving mechanism 2 is lowered by a distance for each PCB received to realize automatic plate collecting.

[0022] The feeding mechanism 1 comprises a feeding support 11, a driving roller 12, a first motor 13, a driven roller 14 and a conveying belt 15. The driving roller 12 and the driven roller 14 are rotationally connected in the feeding support 11. One end of the driving roller 12 is fixedly connected to the output end of the first motor 13, and the first motor 13 is fixedly connected to the feeding support 11. The conveying belt 15 is sleeved on the driving roller 12 and the driven roller 14.

[0023] The PCB is conveyed by the conveying belt 15, in order to prevent the PCB from deviating during transportation, the guiding mechanism 5 is arranged on the feeding mechanism 1, the guiding mechanism 5 is composed of two opposite guiding assemblies, the guiding assembly comprises a screw rod 51, a guiding plate 52, a rotating disc 53 and a limiting rod 54, the screw rod 51 is threadedly connected to the side plate of the feeding support 11, the guiding plate 52 is rotatably connected to one end of the screw rod 51 close to the conveying belt 15, the rotating disc 53 is fixedly connected to the other end of the screw rod 51, the limiting rod 54 is arranged on the two sides of the screw rod 51 and slidably connected to the side plate of the feeding support 11, and the limiting rod 54 is fixedly connected to the guiding plate 52 at an end close to the conveying belt 15. In order to prevent the PCB from moving out of the conveying belt 15 during transportation, the baffle 6 is fixedly connected to one end of the feeding mechanism 1 close to the receiving mechanism 2.

[0024] During operation, first, the rotating disc 53 in the guiding mechanism 5 is adjusted according to the size of the PCB, the rotating disc 53 drives the screw rod 51 to rotate, and then drives the guiding plate 52 to move close to or away from the center position of the conveying belt 15, so that it is adjusted to the appropriate position, the limiting rod 54 ensures the stable movement of the guiding plate 52, and at the same time, the baffle 6 prevents the PCB from moving out of the conveying belt 15 during transportation.

[0025] The receiving mechanism 2 comprises a fixed frame 21, a first lead screw 22, a first screw sleeve 23, a second motor 24, a first guide rod 25, a first sliding sleeve 26, a first connecting plate 27, a support plate 28 and a receiving plate 29, the fixed frame 21 is fixedly connected to the mounting frame 41 of the adsorption mechanism 4, the first lead screw 22 is rotatably connected between the upper and lower connecting rods of the fixed frame 21, one end of the first lead screw 22 is fixedly connected to the output end of the second motor 24, the second motor 24 is fixedly connected to the fixed frame 21, the first lead screw 22 is threadedly connected with the first screw sleeve 23, the two sides of the first lead screw 22 are respectively provided with the first guide rod 25, the first guide rod 25 is fixedly connected between the upper and lower connecting rods of the fixed frame 21, the first guide rod 25 is slidably connected with the first sliding sleeve 26, the first screw sleeve 23 and one side of the two first sliding sleeves 26 are fixedly connected with the first connecting plate 27, the first connecting plate 27 is vertically fixedly connected with a plurality of support plates 28, the plurality of support plates 28 are equidistantly arranged, and the upper end of the support plate 28 is fixedly connected with the receiving plate 29. During operation, the PCB is placed on the receiving plate 29 after being adsorbed by the adsorption mechanism 4, then the second motor 24 is started to drive the receiving plate 29 to move downward by a distance, the next PCB is continuously received, and the cycle is repeated, and the second motor 24 drives the receiving plate 29 to move downward by a distance after receiving each PCB.

[0026] The adsorbing mechanism 4 comprises a mounting frame 41, a second lead screw 42, a second screw sleeve 43, a third motor 44, a second guide rod 45, a second sliding sleeve 46, a second connecting plate 47, a connecting block 48, a mounting plate 49, two lifting cylinders 416 and a vacuum chuck assembly. The second lead screw 42 is rotatably connected to the top of the mounting frame 41, one end of the second lead screw 42 is fixedly connected with the output end of the third motor 44, the third motor 44 is fixedly connected to the mounting frame 41, the second screw sleeve 43 is threadedly connected to the second lead screw 42, the two sides of the second lead screw 42 are respectively provided with the second guide rod 45, the second guide rod 45 is fixedly connected to the mounting frame 41, the second sliding sleeve 46 is slidably connected to the second guide rod 45, the second sliding sleeve 46 and the lower end of the second screw sleeve 43 are fixedly connected with the second connecting plate 47, the lower end of the second connecting plate 47 is fixedly connected with the connecting block 48, the lower end of the connecting block 48 is fixedly connected with the mounting plate 49, and the lower end of the mounting plate 49 is fixedly connected with the two lifting cylinders 416. Each lifting cylinder 416 is fixedly connected with a vacuum chuck assembly at the lower end. The vacuum chuck assembly comprises a chuck connecting plate 410 and a plurality of chucks 411, and the plurality of chucks 411 are equidistantly mounted on the chuck connecting plate 410.

[0027] In order to adapt to PCB boards of different sizes, an adjusting assembly is arranged between the mounting plate 49 and the lifting cylinder 416. The adjusting assembly comprises a bidirectional lead screw 412, a fourth motor 413, a moving block 414 and a third connecting plate 415. A mounting groove 491 is formed in the bottom surface of the mounting plate 49, and the bidirectional lead screw 412 is rotatably connected in the mounting groove 491. One end of the bidirectional lead screw 412 is fixedly connected with the output end of the fourth motor 413, and the fourth motor 413 is fixedly connected to the mounting plate 49. The opposite sides of the bidirectional lead screw 412 are threadedly connected with the moving block 414, and the lower end of the moving block 414 is fixedly connected with the third connecting plate 415. The lower end of the third connecting plate 415 is fixedly connected with the lifting cylinder 416.

[0028] The conveying mechanism 3 comprises a bottom plate 31, universal wheels 32, a connecting frame 33 and conveying rods 34. The universal wheels 32 are fixedly connected to the lower end of the four corners of the bottom plate 31, and each universal wheel 32 is provided with a foot brake 321. The connecting frame 33 is fixedly connected to one side of the bottom plate 31, and a plurality of conveying rods 34 are vertically connected to the connecting frame 33. The plurality of conveying rods 34 are equidistantly and staggeredly arranged with the support plates 28. The conveying rod 34 is in an inverted L shape, one end of the conveying rod 34 is fixedly connected with the connecting frame 33, and the other end is fixedly connected with the bottom plate 31. Figure 5 When the receiving mechanism 2 is full of PCB boards, the second motor 24 is started to drive the receiving plate 29 to continue to move downward. Since the conveying rods 34 are staggeredly arranged with the support plates 28, the support plates 28 will be inserted between the conveying rods 34. When the receiving plate 29 is lowered below the horizontal rods of the conveying rods 34, as shown in FIG. 9, the PCB boards are transferred to the conveying rods 34 at this time, and then the conveying mechanism 3 can be moved through the universal wheels 32 to move the PCB boards to the next process.

[0029] The working principle of the utility model is: first, according to the size of PCB, adjust the rotating disc 53 in the guide mechanism 5, the rotating disc 53 drives the screw rod 51 to rotate, and then drive the guide plate 52 to approach or away from the center position of the conveying belt 15, make it adjust to the appropriate position, the limit rod 54 ensures that the guide plate 52 moves stably, at the same time, the baffle 6 prevents the PCB from moving out of the conveying belt 15 in transportation;After the PCB is transported to the appropriate position, the suction mechanism 4 starts to work, the third motor 44 drives the second screw rod 42, makes the vacuum chuck assembly after suctioning the PCB move to the above of the receiving mechanism 2, and place to the receiving plate 29, then the second motor 24 drives the first screw rod 22 to rotate, drive the receiving plate 29 to move down a distance to receive the next PCB, reciprocating, the receiving mechanism 2 carries out the automatic plate collecting work;When the PCB of different sizes needs to be processed, the adjusting assembly in the suction mechanism 4 can be adjusted, the fourth motor 413 drives the bidirectional screw rod 412 to rotate, makes the moving block 414 drive the third connecting plate 415 and the lifting cylinder 416 at the lower end to move, thereby adjusting the position of the vacuum chuck assembly, to adapt to the PCB of different sizes;When the receiving mechanism 2 is full of PCB, start the second motor 24 again, drive the receiving plate 29 to continue to move down, because the transport rod 34 and the supporting plate 28 are staggered, in the descending process of the receiving plate 29, the supporting plate 28 will be inserted between the transport rod 34, when the receiving plate 29 drops below the horizontal rod of the transport rod 34, due to the action of gravity, the PCB naturally falls on the transport rod 34, then, loosen the foot brake 321 on the universal wheel 32, push the transport mechanism 3, move the transport mechanism 3 full of PCB to the next process through the universal wheel 32, complete a working cycle of the automatic plate collecting device.

[0030] Although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical scheme recorded in the foregoing embodiments can be modified, or part of the technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. An automatic PCB plate collecting device for PCB plate, comprising a feeding mechanism (1), characterized in that, One side of the feeding mechanism (1) is provided with a liftable receiving mechanism (2), the lower side of the receiving mechanism (2) is provided with a conveying mechanism (3), the upper side of the feeding mechanism (1) and the receiving mechanism (2) is provided with an adsorption mechanism (4), the receiving mechanism (2) comprises a fixed frame (21), a first lead screw (22), a first screw sleeve (23), a second motor (24), a first guide rod (25), a first sliding sleeve (26), a first connecting plate (27), a supporting plate (28) and a receiving plate (29), the fixed frame (21) is fixedly connected to the mounting frame (41) of the adsorption mechanism (4), the first lead screw (22) is rotatably connected between the upper and lower connecting rods of the fixed frame (21), one end of the first lead screw (22) is fixedly connected to the output end of the second motor (24), the second motor (24) is fixedly connected to the fixed frame (21), the first lead screw (22) is threadedly connected with the first screw sleeve (23), the two sides of the first lead screw (22) are respectively provided with the first guide rod (25), the first guide rod (25) is fixedly connected between the upper and lower connecting rods of the fixed frame (21), the first guide rod (25) is slidably connected with the first sliding sleeve (26), the first screw sleeve (23) and the two first sliding sleeves (26) are fixedly connected with the first connecting plate (27) on one side, the first connecting plate (27) is vertically fixedly connected with a plurality of supporting plates (28), the plurality of supporting plates (28) are equidistantly arranged, and the upper end of the supporting plate (28) is fixedly connected with the receiving plate (29).

2. The automatic board collecting device for PCB according to claim 1, wherein, The feeding mechanism (1) comprises a feeding support (11), a driving roller (12), a first motor (13), a driven roller (14) and a conveying belt (15), the driving roller (12) and the driven roller (14) are rotatably connected in the feeding support (11), one end of the driving roller (12) is fixedly connected to the output end of the first motor (13), the first motor (13) is fixedly connected to the feeding support (11), and the driving roller (12) and the driven roller (14) are sleeved with the conveying belt (15).

3. The automatic board collecting device for PCB according to claim 2, characterized in that, A guide mechanism (5) is arranged on the feeding mechanism (1), the guide mechanism (5) comprises two opposite guide assemblies, each guide assembly comprises a screw rod (51), a guide plate (52), a rotating disc (53) and a limiting rod (54), the screw rod (51) is threadedly connected to the side plate of the feeding support (11), the guide plate (52) is rotatably connected to one end of the screw rod (51) close to the conveying belt (15), the rotating disc (53) is fixedly connected to the other end of the screw rod (51), and one limiting rod (54) is arranged on each side of the screw rod (51), the limiting rod (54) penetrates through the side plate of the feeding support (11) and is slidably connected with the side plate, and one end of the limiting rod (54) close to the conveying belt (15) is fixedly connected with the guide plate (52).

4. The automatic board collecting device for PCB according to claim 3, characterized in that, A baffle (6) is fixedly connected to one end of the feeding mechanism (1) close to the receiving mechanism (2).

5. The automatic board collecting device for PCB according to claim 1, wherein The adsorption mechanism (4) comprises a mounting frame (41), a second lead screw (42), a second screw sleeve (43), a third motor (44), a second guide rod (45), a second sliding sleeve (46), a second connecting plate (47), a connecting block (48), a mounting plate (49), a lifting cylinder (416) and a vacuum chuck assembly, the second lead screw (42) is rotatably connected to the top of the mounting frame (41), one end of the second lead screw (42) is fixedly connected with the output end of the third motor (44), the third motor (44) is fixedly connected to the mounting frame (41), the second screw sleeve (43) is threadedly connected to the second lead screw (42), the two sides of the second lead screw (42) are respectively provided with the second guide rod (45), the second guide rod (45) is fixedly connected to the mounting frame (41), the second sliding sleeve (46) is slidably connected to the second guide rod (45), the second sliding sleeve (46) and the lower end of the second screw sleeve (43) are fixedly connected with the second connecting plate (47), the lower end of the second connecting plate (47) is fixedly connected with the connecting block (48), the lower end of the connecting block (48) is fixedly connected with the mounting plate (49), the lower end of the mounting plate (49) is fixedly connected with two lifting cylinders (416), the lower end of each lifting cylinder (416) is fixedly connected with a vacuum chuck assembly, the vacuum chuck assembly comprises a chuck connecting plate (410) and a plurality of chucks (411), and the plurality of chucks (411) are equidistantly mounted on the chuck connecting plate (410).

6. The automatic board collecting device for PCB according to claim 5, wherein, A adjusting assembly is arranged between the mounting plate (49) and the lifting cylinder (416), the adjusting assembly comprises a bidirectional lead screw (412), a fourth motor (413), a moving block (414) and a third connecting plate (415), a mounting groove (491) is formed in the bottom surface of the mounting plate (49), the bidirectional lead screw (412) is rotatably connected in the mounting groove (491), one end of the bidirectional lead screw (412) is fixedly connected with the output end of the fourth motor (413), the fourth motor (413) is fixedly connected to the mounting plate (49), the opposite sides of the bidirectional lead screw (412) are threadedly connected with the moving block (414), the lower end of the moving block (414) is fixedly connected with the third connecting plate (415), and the lower end of the third connecting plate (415) is fixedly connected with the lifting cylinder (416).

7. The automatic board collecting device for PCB according to claim 1, wherein The conveying mechanism (3) comprises a bottom plate (31), universal wheels (32), a connecting frame (33) and conveying rods (34), the universal wheels (32) are fixedly connected to the lower end of the four corners of the bottom plate (31), the universal wheels (32) are provided with foot brakes (321), the connecting frame (33) is fixedly connected to one side of the bottom plate (31), a plurality of conveying rods (34) are vertically connected to the connecting frame (33), the plurality of conveying rods (34) are equidistantly and staggeredly arranged with the supporting plate (28), the conveying rod (34) is inverted L-shaped, one end of the conveying rod (34) is fixedly connected with the connecting frame (33), and the other end is fixedly connected with the bottom plate (31).

Images