CN220681118U - Spreading device for tray processing - Google Patents

Abstract

The utility model relates to the technical field of tray processing equipment, in particular to a spreading device for tray processing, which comprises a frame, a feeding assembly and a leveling assembly. The feeding assembly, the feeding assembly and the leveling assembly are arranged on the rack, automatic feeding is realized in the production process of the tray, materials are conveyed to the die, the leveling assembly levels and evenly paved materials on the die, compression molding is carried out after spreading is finished, and a tray product is obtained after demolding, so that full-automatic production and processing of the tray, particularly the tray taking particles such as wood chips, straws and the like as main raw materials are realized, the automation degree is high, the operation is more convenient, the manual operation is reduced, the manual labor intensity is reduced, and the processing efficiency is effectively improved; meanwhile, the automatic spreading device can ensure that the material on the die spreads more uniformly, and improves the processing quality of the tray.

Description

Spreading device for tray processing

Technical Field

The utility model relates to the technical field of tray processing equipment, in particular to a spreading device for tray processing.

Background

In the technical field of tray processing, in particular to a wooden tray obtained by adopting wood chip particles, plant straw particles and the like as raw materials for compression molding, which not only can meet the requirements of cargo carrying, storage and transportation, but also is more environment-friendly and widely applied in the industry of multiple industries. In the processing process of the wooden tray, the mixed materials such as wood dust, straw and the like are required to be evenly laid in a die for compression molding. However, in the prior art, the mixed materials are usually placed on a die manually and are laid flat, so that a plurality of workers are needed for cooperation, the labor intensity is high, and the working efficiency is low; and the uniformity of the spreading can influence the processing quality of the tray, so that the consistency of manual operation is difficult to ensure. Based on the above-mentioned problems, the prior art is therefore in need of further improvement.

Disclosure of Invention

The utility model aims to provide a spreading device for tray processing, which is used for solving the prior art problems in the background technology.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the utility model provides a spreading device for tray processing, including frame, material loading subassembly, feeding subassembly and leveling subassembly, the material loading subassembly sets up on the frame top for the material's material loading, the feeding subassembly sets up in the frame and is located the below of material loading subassembly for the transport of material, leveling subassembly corresponds the setting in being located the terminal frame of feeding subassembly, is used for the leveling of material on the mould.

On the basis of the technical scheme, the spray assembly is arranged at the tail end of the leveling assembly and is used for spraying materials and molds; the spray assembly comprises a first water pipe, a second water pipe and a spray header, wherein the first water pipe and the second water pipe are both rotationally connected with the frame, and the spray header is uniformly provided with a plurality of spray headers on the first water pipe and the second water pipe.

On the basis of the technical scheme, the feeding assembly comprises a feeding groove, a feeding shaft and blades, wherein the feeding shaft is arranged in the feeding groove and driven to rotate by a first driving mechanism, the blades are fixedly arranged on the outer side wall of the feeding shaft and are spirally arranged along the axial direction, a feeding hole is formed in the bottom of the feeding groove, and the feeding hole is correspondingly formed in the upper portion of the feeding assembly.

On the basis of the technical scheme, the feeding assembly further comprises a feeding mechanism, the feeding mechanism comprises a sealing plate and a second driving mechanism, the sealing plate is matched with the feeding hole and correspondingly arranged on one side of the feeding hole, and the second driving mechanism is fixedly arranged on the outer side wall of the feeding groove and drives the sealing plate to slide.

On the basis of the technical scheme, the feeding assembly comprises a first belt conveying mechanism and a stirring conveying mechanism, wherein the first belt conveying mechanism is arranged below the feeding assembly, and the stirring conveying mechanism is arranged above the first belt conveying mechanism and is positioned on one side of the feeding assembly and used for stirring and conveying materials.

On the basis of the technical scheme, the stirring conveying mechanism comprises shaft rollers, stirring teeth and a third driving mechanism, wherein the shaft rollers are uniformly provided with a plurality of stirring teeth and are sequentially arranged from a feeding hole to the first belt conveying mechanism in an inclined mode, the stirring teeth are uniformly distributed along the circumferential direction and the axial direction of the shaft rollers, and the third driving mechanism drives the shaft rollers to be rotationally connected with the frame.

On the basis of the technical scheme, the leveling assembly comprises rake teeth and a rotating shaft, a plurality of groups of rake teeth are uniformly arranged along the circumferential direction and the axial direction of the rotating shaft, and the rotating shaft is rotationally connected with the frame and driven to rotate by a fourth driving mechanism.

On the basis of the technical scheme, the leveling assembly further comprises an adjusting mechanism, the adjusting mechanism comprises a mounting frame, nuts and a screw rod, the mounting frame is symmetrically arranged on two sides of the frame, two ends of the rotating shaft are rotationally connected with the mounting frame, the screw rod is arranged on the top end of the mounting frame and rotationally connected with the mounting frame, and the screw rod is provided with the nuts in the frame and is in threaded connection with the nuts.

On the basis of the technical scheme, the device also comprises a waste recycling component for recycling waste of materials; the waste recycling assembly is arranged to be a second belt conveying mechanism, the head end of the waste recycling assembly is located below the leveling assembly, and the second belt conveying mechanism and the first belt conveying mechanism are identical in structure.

On the basis of the technical scheme, the first belt conveying mechanism comprises a first motor, a driving roller, a conveying belt and a driven roller, wherein the first motor is fixedly arranged on the frame, the driving roller is driven by the first motor to rotate, and the driven roller is driven by the driving roller to rotate through the conveying belt.

The technical scheme provided by the utility model has the beneficial effects that:

the utility model provides a spreading device for pallet processing, which is characterized in that a feeding component, a feeding component and a leveling component are arranged on a rack, so that automatic feeding is realized in the production process of pallets, materials are conveyed to a die, the materials laid on the die are leveled and uniformly through the leveling component, compression molding is performed after spreading is finished, a pallet product is obtained after demoulding, the full-automatic production and processing of pallets, particularly pallets with particles such as wood dust and straw, are realized, the automation degree is high, the operation is more convenient, the manual operation is reduced, the manual labor intensity is reduced, and the processing efficiency is effectively improved; meanwhile, the automatic spreading device can ensure that the material on the die spreads more uniformly, and improves the processing quality of the tray.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic perspective view of another angle of the present utility model;

FIG. 3 is a schematic view of a part of an exploded view of a loading assembly according to the present utility model;

FIG. 4 is a schematic perspective view of a feed assembly according to the present utility model;

FIG. 5 is a schematic view of a perspective view of another angle of the feed assembly of the present utility model;

FIG. 6 is a schematic view of the configuration of the leveling assembly and the shower assembly of the present utility model;

FIG. 7 is a schematic view of the construction of the waste reclamation assembly of the present utility model;

Detailed Description

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

in the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be understood that the terms "left", "right", "front", "rear", "top", "bottom", and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1

As shown in fig. 1 to 7, a spreading device for tray processing comprises a frame 1, a feeding assembly 2, a feeding assembly 3 and a leveling assembly 4, wherein the feeding assembly 2 is arranged at the top end of the frame 1 and is used for feeding materials, the feeding assembly 3 is arranged on the frame 1 and is positioned below the feeding assembly 2 and is used for conveying the materials, and the leveling assembly 4 is correspondingly arranged on the frame 1 positioned at the tail end of the feeding assembly 3 and is used for spreading the materials on a die.

The utility model provides a spreading device for pallet processing, which is characterized in that a feeding component 2, a feeding component 3 and a leveling component 4 are arranged on a rack, so that automatic feeding is realized in the production process of pallets, materials are conveyed to a die, the materials laid on the die are leveled uniformly through the leveling component, compression molding is performed after spreading is finished, and a pallet product is obtained after demoulding, so that full-automatic production and processing of pallets, particularly pallets with particles such as sawdust and straw, are realized, the automation degree is high, the operation is more convenient, the manual operation is reduced, the manual labor intensity is reduced, and the processing efficiency is effectively improved; meanwhile, the automatic spreading device can ensure that the material on the die spreads more uniformly, and improves the processing quality of the tray.

On the basis of the technical scheme, the feeding assembly 2 comprises a feeding groove 21, a feeding shaft 22 and blades 23, wherein the feeding shaft 22 is arranged in the feeding groove 21 and driven to rotate by a first driving mechanism 24, the blades 23 are fixedly arranged on the outer side wall of the feeding shaft 22 and are spirally arranged along the axial direction, a feeding hole 25 is formed in the bottom of the feeding groove 21, and the feeding hole 25 is correspondingly formed in the upper portion of the feeding assembly 3.

Preferably, the feeding device further comprises a feeding barrel 26, one end of the feeding barrel 26 is connected with the feeding hole 25 in a penetrating mode, and the other end of the feeding barrel is arranged on the frame 1 and located above the feeding assembly 3.

Preferably, the first driving mechanism 24 is configured as a driving motor or a combination mode of the driving motor and a belt transmission mechanism or a combination mode of the driving motor and a gear transmission mechanism, and is only required to drive the feeding shaft to rotate; more preferably, the first driving mechanism 24 is provided as a driving motor in the present embodiment.

On the basis of the technical scheme, the feeding assembly 2 further comprises a feeding mechanism, the feeding mechanism comprises a sealing plate 27 and a second driving mechanism 28, the sealing plate 27 is matched with the feeding hole 25 and correspondingly arranged on one side of the feeding hole 25, and the second driving mechanism 28 is fixedly arranged on the outer side wall of the feeding groove 21 and drives the sealing plate 27 to slide.

Preferably, the second driving mechanism 28 is configured as a cylinder or an electric push rod; the sealing plate 27 can be driven to slide, the feeding port 25 is opened or closed, feeding is carried out according to the requirement of actual material quantity, and the practicability is better. More preferably, the second driving mechanism 28 is provided as a cylinder in the present embodiment.

The automatic feeding of the raw materials required by tray processing can be realized through the feeding component 2; specifically, the material is input from one end of the feeding groove 21, and the feeding shaft 22 and the helically arranged blades 23 arranged on the feeding shaft rotate to convey the material to a feeding hole 25 arranged on the feeding groove 21; when the feeding assembly 2 does not work, the sealing plate 27 is located at the feeding opening 25, when feeding operation is needed, namely after materials are input, the second driving mechanism 28 drives the sealing plate 27 to move, the sealing plate 27 is pulled out from the position of the feeding opening 25, the materials enter the feeding cylinder 26 from the feeding opening 25, and the materials fall onto the feeding assembly 3 to be fed, so that an automatic feeding process is completed. After the primary feeding is completed, the sealing plate 27 is driven by the second driving mechanism 28 to seal the feeding hole 25, so that continuous feeding or intermittent feeding can be realized, and the operation is performed according to actual requirements, so that the use is more convenient.

On the basis of the technical scheme, the feeding assembly 3 comprises a first belt conveying mechanism 31 and a stirring conveying mechanism 32, wherein the first belt conveying mechanism 31 is arranged below the feeding assembly 2, and the stirring conveying mechanism 32 is arranged above the first belt conveying mechanism 31 and is positioned on one side of the feeding assembly 2 and used for stirring and conveying materials.

Specifically, the first belt conveying mechanism 31 is disposed below the feed inlet 25, and the stirring and conveying mechanism 32 is correspondingly disposed at one side of the feed inlet 25.

On the basis of the above technical scheme, the stirring and conveying mechanism 32 comprises a shaft roller 321, stirring teeth 322 and a third driving mechanism, the shaft roller 321 is uniformly provided with a plurality of stirring teeth 322 and is sequentially arranged from the feeding hole 25 to the first belt conveying mechanism 31 in an inclined manner, the stirring teeth 322 are uniformly distributed along the circumferential direction and the axial direction of the shaft roller 321, and the third driving mechanism drives the shaft roller 321 to be rotationally connected with the frame 1.

Preferably, the third driving mechanism is arranged in a mode of a plurality of driving motors or driving motors and a belt transmission structure or a driving motor and a multi-gear transmission structure or a driving motor and a gear chain transmission structure, and drives the plurality of shaft rollers to synchronously rotate. More preferably, in this embodiment, the third driving mechanism adopts a mode that a driving motor and a gear chain transmission structure are matched to drive the multi-axis rollers to synchronously rotate, specifically, the third driving mechanism includes a second motor 323, a speed reducer 324, a main gear 325 and a slave gear 326, the second motor 323 is fixedly arranged on the frame 1 and drives the main gear 325 to rotate through the speed reducer 324, two slave gears 326 are arranged on the shaft rollers 321, the main gear 325 drives one of the slave gears 326 to rotate through a chain, and the other slave gear 326 drives the slave gear 326 on the adjacent shaft roller to rotate through the chain; therefore, each of the shaft rollers 321 is provided with two slave gears 326, it can be understood that one slave gear is provided on the last shaft roller, that is, one slave gear can be driven to rotate by the adjacent slave gear through the chain, and correspondingly, the plurality of shaft rollers are sequentially and correspondingly provided to realize synchronous rotation of the multi-shaft rollers.

When the stirring device works, the second motor 323 is started to drive the main gear 325 to rotate, synchronous rotation of the shaft rollers 321 is realized through the slave gears 326 and the chains, and the stirring teeth 322 fixedly arranged on the shaft rollers 321 stir and convey the mixed materials coming out of the feed inlet 25 and the feed cylinder 26. Simultaneously, the materials falling onto the conveyor belt in the feed inlet 25 can form accumulation in a short time and have a certain height, so that the accumulated materials are conveniently scraped off and further stirred and mixed through the plurality of shaft rollers 321 and the stirring teeth 322 which are arranged in an inclined state in sequence, and meanwhile, the conveyor belt has a better auxiliary effect on conveying the materials.

On the basis of the technical scheme, the leveling assembly 4 comprises rake teeth 41 and a rotating shaft 42, wherein a plurality of groups of rake teeth 41 are uniformly arranged along the circumferential direction and the axial direction of the rotating shaft 42, and the rotating shaft 42 is rotationally connected with the frame 1 and is driven to rotate by a fourth driving mechanism 43.

Specifically, the fourth driving mechanism 43 is configured as a driving motor. The fourth driving mechanism 43 is started to drive the rotating shaft 42 to rotate, so that the rake teeth 41 on the fourth driving mechanism are driven to rotate, the plurality of groups of rake teeth 41 which are uniformly distributed rake the materials conveyed to the die, the materials on the die are spread more uniformly, and the processing quality of the tray is guaranteed.

On the basis of the technical scheme, the leveling assembly 4 further comprises an adjusting mechanism, the adjusting mechanism comprises a mounting frame 44, nuts 45 and a screw rod 46, the mounting frame 44 is symmetrically arranged on two sides of the frame 1, two ends of the rotating shaft 42 are rotationally connected with the mounting frame 44, one end of the screw rod 46 is rotationally connected to the top end of the mounting frame 44, the other end of the screw rod 46 is driven to rotate through a fifth driving mechanism, and the frame 1 is provided with the nuts 45, and the screw rod 46 is in threaded connection with the nuts 45.

Through being provided with adjustment mechanism, can adjust axis of rotation 42 and the position of rake teeth 41 on according to the shop material demand of different thickness materials, can also be applicable to the mould operation of co-altitude simultaneously, not only can make the material spread more evenly, still have better suitability, be applicable to the even laying of the material of different thickness. Specifically, the rotation shaft 42 is rotationally connected with the mounting frame 44 through a bearing, the bottom end of the screw rod 46 is rotationally connected with the top end of the mounting frame 44, the top end of the screw rod 46 is provided with a rotating handle, the nut 45 is fixedly arranged on the frame 1 through a nut seat, when the positions of the rotation shaft 42 and the rake teeth 41 need to be adjusted, the rotating handle is rotated to drive the screw rod 46 to rotate, and the screw rod 46 can move in the vertical direction due to the threaded connection of the screw rod 46 and the nut 45, so that the position of the mounting frame 44 and the rotation shaft 42 connected with the mounting frame is driven to change, and the adjustment process is completed.

Through being provided with leveling component 4 and rake teeth 41's height and the adaptation of follow-up mould top terminal surface at the end of feeding component 3, constantly carry the material to the mould at feeding component 3, level component 4 work in the continuous back removal's of mould in-process, rake teeth on it constantly rotate under the drive of axis of rotation 42 and fourth actuating mechanism 43, level the material on the mould, improve the roughness that the material spread. More preferably, adjusting mechanisms are arranged on two sides of the leveling assembly 4, namely, the rotating shaft 42 is driven to move up and down in a driving mode of a nut screw pair, the height position of the rotating shaft 42 is adjusted, and the leveling assembly is suitable for uniformly paving materials with different thicknesses and has higher applicability.

On the basis of the technical scheme, the device also comprises a waste recycling component 6 for recycling waste of materials; the waste recycling assembly 6 is arranged as a second belt conveying mechanism, the head end of the second belt conveying mechanism is located below the leveling assembly 4, and the second belt conveying mechanism and the first belt conveying mechanism 31 are identical in structural composition.

The waste recycling component 6 is further arranged in the embodiment, the waste recycling component is correspondingly arranged below the leveling component 4 and the feeding component 3, the leveling component 4 is used for collecting and recycling redundant materials on a conveying belt in the material or feeding component which falls down in the process of uniformly spreading the materials on the die, and the operation is more convenient. Preferably, the second belt conveying mechanism is obliquely arranged with the frame 1; the conveyer belt that the slope set up retrieves the material, can effectively improve the tip material and appear spilling the problem of material, and is more convenient to the material collection.

Preferably, a plurality of rollers 61 are arranged between the driving roller and the driven roller of the second conveying mechanism, the rollers 62 are arranged on the frame through supporting rods 62, and the smooth conveying of the conveying belt can be effectively assisted under the condition that the conveying belt is longer.

On the basis of the technical scheme, the first belt conveying mechanism 31 comprises a first motor 311, a driving roller 312, a conveying belt 313 and a driven roller 314, wherein the first motor 311 is fixedly arranged on the frame 1, the driving roller 312 is driven to rotate by the first motor 311, and the driven roller 314 is driven to rotate by the driving roller 312 through the conveying belt 313.

The above-mentioned head end and tail end are defined according to the direction of material conveying, and are only for convenience of description of the present technical solution, and do not constitute limitation of the present application.

Example 2

On the basis of the technical scheme of the embodiment 1, the device further comprises a spraying assembly 5 which is arranged at the tail end of the leveling assembly 4 and is used for spraying materials and molds; the spray assembly 5 comprises a first water pipe 51, a second water pipe 52 and a spray header 53, wherein the first water pipe 51 and the second water pipe 52 are both rotationally connected with the frame, and the spray header 53 is uniformly provided with a plurality of spray headers on the first water pipe 51 and the second water pipe 52.

The spraying assembly 5 is arranged to automatically spray materials or molds, so that the demolding operation of the tray is facilitated; the first water pipe 51 and the second water pipe 52 are driven to rotate through the driving motor, so that different angles are adjusted by the spray heads arranged on the first water pipe 51 and the spray heads arranged on the first water pipe, the upper die of a subsequent die pressing die is sprayed on one hand, and the second water pipe 52 and the spray heads arranged on the second water pipe can spray water on materials paved on the lower die of the die pressing die, so that the die releasing operation of the tray is facilitated after die closing and die pressing of the upper die and the lower die is finished, and the die pressing device is more convenient to use.

While the basic principles and main features of the present utility model have been shown and described above, it will be apparent to those skilled in the art that the present utility model is not limited to the details of the above-described exemplary embodiments, and thus the embodiments should be regarded as illustrative rather than restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (10)

1. A spreading device for tray processing, its characterized in that includes frame (1), material loading subassembly (2), feeding subassembly (3) and level subassembly (4), material loading subassembly (2) set up on frame (1) top for the material loading, feeding subassembly (3) set up on frame (1) and lie in the below of feeding subassembly (2) for the transport of material, level subassembly (4) correspond to set up on frame (1) that are located feeding subassembly (3) terminal for the spreading of material on the mould.

2. A spreading device for pallet processing according to claim 1, further comprising a spray assembly (5) arranged at the end of the levelling assembly (4) for spraying of the material and the mould; the spray assembly (5) comprises a first water pipe (51), a second water pipe (52) and a spray header (53), wherein the first water pipe (51) and the second water pipe (52) are rotationally connected with the frame, and the spray header (53) is uniformly provided with a plurality of spray headers on the first water pipe (51) and the second water pipe (52).

3. The spreading device for tray processing according to claim 1, wherein the feeding assembly (2) comprises a feeding groove (21), a feeding shaft (22) and blades (23), the feeding shaft (22) is arranged in the feeding groove (21) and is driven to rotate by a first driving mechanism (24), the blades (23) are fixedly arranged on the outer side wall of the feeding shaft (22) and are spirally arranged along the axial direction, a feeding opening (25) is formed in the bottom of the feeding groove (21), and the feeding opening (25) is correspondingly arranged above the feeding assembly (3).

4. A spreading device for pallet processing according to claim 3, wherein the feeding assembly (2) further comprises a feeding mechanism, the feeding mechanism comprises a sealing plate (27) and a second driving mechanism (28), the sealing plate (27) is adapted to the feeding hole (25) and is correspondingly arranged at one side of the feeding hole (25), and the second driving mechanism (28) is fixedly arranged on the outer side wall of the feeding groove (21) and drives the sealing plate (27) to slide.

5. A spreading device for pallet processing according to claim 1, wherein the feeding assembly (3) comprises a first belt conveying mechanism (31) and a stirring and conveying mechanism (32), the first belt conveying mechanism (31) is arranged below the feeding assembly (2), and the stirring and conveying mechanism (32) is arranged above the first belt conveying mechanism (31) and is positioned on one side of the feeding assembly (2) for stirring and conveying materials.

6. The spreading device for tray processing according to claim 5, wherein the stirring and conveying mechanism (32) comprises a shaft roller (321), stirring teeth (322) and a third driving mechanism, the shaft roller (321) is uniformly provided with a plurality of stirring teeth and is sequentially arranged in an inclined manner from a feeding hole (25) to the first belt conveying mechanism (31), the stirring teeth (322) are uniformly distributed along the circumferential direction and the axial direction of the shaft roller (321), and the third driving mechanism drives the shaft roller (321) to be rotationally connected with the frame (1).

7. A spreading device for pallet processing according to claim 1, wherein the levelling assembly (4) comprises rake teeth (41) and a rotating shaft (42), the rake teeth (41) are uniformly provided with a plurality of groups along the circumferential direction and the axial direction of the rotating shaft (42), and the rotating shaft (42) is rotationally connected with the frame (1) and is driven to rotate by a fourth driving mechanism (43).

8. The spreading device for tray processing according to claim 7, wherein the leveling component (4) further comprises an adjusting mechanism, the adjusting mechanism comprises a mounting frame (44), nuts (45) and a screw (46), the mounting frame (44) is symmetrically arranged on two sides of the frame (1), two ends of the rotating shaft (42) are rotationally connected with the mounting frame (44), the screw (46) is arranged on the top end of the mounting frame (44) and rotationally connected with the mounting frame, the nut (45) is arranged on the frame (1), and the screw (46) is in threaded connection with the nuts (45).

9. A spreading device for pallet processing according to claim 4, further comprising a waste recycling assembly (6) for waste recycling of material; the waste recycling assembly (6) is arranged to be a second belt conveying mechanism, the head end of the waste recycling assembly is located below the leveling assembly (4), and the second belt conveying mechanism and the first belt conveying mechanism (31) are identical in structural composition.

10. A spreading device for pallet processing according to claim 9, wherein the first belt conveying mechanism (31) comprises a first motor (311), a driving roller (312), a conveyor belt (313) and a driven roller (314), the first motor (311) is fixedly arranged on the frame (1), the driving roller (312) is driven to rotate by the first motor (311), and the driven roller (314) is driven to rotate by the driving roller (312) through the conveyor belt (313).