CN213595340U

CN213595340U - Material conveying device

Info

Publication number: CN213595340U
Application number: CN202022730828.6U
Authority: CN
Inventors: 白洁
Original assignee: Inner Mongolia Yili Industrial Group Co Ltd
Current assignee: Inner Mongolia Yili Industrial Group Co Ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-07-02
Anticipated expiration: 2030-11-23

Abstract

The embodiment of the application provides a material conveying device, includes: the first conveying line and the second conveying line are arranged at intervals and have opposite movement directions; the material transfer mechanism is movably arranged between the first conveying line and the second conveying line and comprises a transmission gear, a driving wheel, a driven wheel and a flexible belt, the transmission gear, the first conveying line and the second conveying line form chain transmission, the driving wheel is in transmission connection with the transmission gear, the flexible belt is tensioned between the driving wheel and the driven wheel to form flexible belt transmission, and materials on the first conveying line are transferred to the second conveying line through a gap between the flexible belt and the driven wheel. The material conveying device provided by the embodiment of the application can buffer and temporarily store materials between the upstream equipment and the downstream equipment, reduces the stop times of the upstream equipment, and guarantees the normal operation time of the upstream equipment, so that the effects of adjusting the production line speed and guaranteeing the efficient operation of the production line are achieved.

Description

Material conveying device

Technical Field

The application relates to the technical field of conveying equipment, in particular to a material conveying device.

Background

A material transfer apparatus in the related art is generally provided between an upstream apparatus and a downstream apparatus for transferring material from the upstream apparatus to the downstream apparatus. However, when the downstream equipment fails, the upstream equipment and the material conveying equipment are generally required to be stopped, and the upstream equipment and the material conveying equipment are restarted after the downstream equipment failure is eliminated, so that the production process is interrupted, and the operation efficiency and the production efficiency of the production line are low.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a material conveying device to solve or alleviate one or more technical problems in the prior art.

As an aspect of an embodiment of the present application, an embodiment of the present application provides a material conveying device, including: the first conveying line and the second conveying line are arranged at intervals and have opposite movement directions; the material transfer mechanism is movably arranged between the first conveying line and the second conveying line and comprises a transmission gear, a driving wheel, a driven wheel and a flexible belt, the transmission gear, the first conveying line and the second conveying line form chain transmission, the driving wheel is in transmission connection with the transmission gear, the flexible belt is tensioned between the driving wheel and the driven wheel to form flexible belt transmission, and materials on the first conveying line are transferred to the second conveying line through a gap between the flexible belt and the driven wheel.

In one embodiment, the material transfer mechanism further comprises a support, and the transmission gear, the driving wheel and the driven wheel are arranged on the support.

In an embodiment, the material transfer mechanism further comprises an adjusting portion, the adjusting portion is arranged on the support and is adjacent to the first conveying line, the adjusting portion comprises a roller, and the roller tensions the flexible belt to adjust an included angle between the flexible belt and the moving direction of the first conveying line.

In one embodiment, the flexible belt is at an angle of 0-45 degrees to the direction of movement of the first conveyor line.

In one embodiment, the adjusting part further comprises a mounting member, the roller is rotatably arranged on the mounting member, the mounting member is arranged on the bracket, and the length of the mounting member extending out of the bracket is adjustable.

In one embodiment, the material transfer mechanism further comprises a tension wheel, the tension wheels are rotatably arranged on the support, and the flexible belt is sleeved on the tension wheels.

In one embodiment, the plurality of tension wheels comprise a first tension wheel, a second tension wheel, a third tension wheel and a fourth tension wheel, and the first tension wheel and the second tension wheel are arranged on one side of the rotation center of the driving wheel, which is far away from the driven wheel, so that the outer side surface of the flexible belt is attached to the transmission surface of the driving wheel; the third tensioning wheel and the fourth tensioning wheel are arranged on one side, away from the driving wheel, of the rotation center of the driven wheel, so that the outer side surface of the flexible belt is attached to the transmission surface of the driven wheel.

In one embodiment, the material transfer mechanism further comprises a material support plate disposed between the first conveyor line and the second conveyor line, the material support plate being connected to the support and located below the driven wheel.

In one embodiment, the material support plate is arranged inclined downwards in the direction from the first conveyor line to the second conveyor line.

Through adopting above-mentioned technical scheme, the material conveyor of this application embodiment can buffer between upstream equipment and low reaches equipment and keep in the material, reduces the number of times of shutting down of upstream equipment, guarantees the up-stream equipment's up-stream operation time to play the effect of adjusting production line speed, guaranteeing the high-efficient operation of production line.

The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will be readily apparent by reference to the drawings and following detailed description.

Drawings

In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope.

FIG. 1 illustrates a material transport device according to one embodiment of the present application;

FIG. 2 illustrates a material transport device according to another embodiment of the present application;

fig. 3 shows a schematic view of a transmission gear of the material conveying device according to the embodiment of the present application in transmission cooperation with the first conveying line and the second conveying line.

Description of reference numerals:

a material conveying device 1;

a first conveyor line 10; a chain 11; a chain link 111; a chain groove 112;

a second conveyor line 20;

a material transfer mechanism 30; a bracket 31; a transmission gear 32; a capstan 33; a driven pulley 34; a flexible band 35; an adjusting portion 36; a roller 361; a mount 362; a tension pulley 37; a first tensioning wheel 371; a second tension pulley 372; a third tensioning wheel 373; a fourth tensioning wheel 374; a material support plate 38.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present application. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

A material conveying apparatus 1 according to an embodiment of the present application is described below with reference to fig. 1 to 3.

Fig. 1 shows a schematic structural diagram of a material conveying device 1 according to an embodiment of the present application. As shown in fig. 1, the material conveying apparatus 1 includes a first conveying line, a second conveying line, and a material transfer mechanism 30.

Specifically, the first and

second conveyor lines

10 and 20 are disposed at intervals and move in opposite directions. The material transfer mechanism 30 is movably arranged between the first conveying line 10 and the second conveying line 20, the material transfer mechanism 30 comprises a transmission gear 32, a driving wheel 33, a driven wheel 34 and a flexible belt 35, the transmission gear 32 forms a chain transmission with the first conveying line 10 and the second conveying line 20, the driving wheel 33 is in transmission connection with the transmission gear 32, the flexible belt 35 is tensioned between the driving wheel 33 and the driven wheel 34 to form a flexible belt 35 transmission, and the material on the first conveying line 10 is transferred to the second conveying line 20 through a gap between the flexible belt 35 and the driven wheel 34.

For example, the first conveyor line 10 and the second conveyor line 20 may be arranged in a straight direction in the drawing, and the first conveyor line 10 and the second conveyor line 20 are parallel to each other. In other examples, the first conveyor line 10 and the second conveyor line 20 may be arranged along any curved line, for example, may be arranged in a shape extending spirally in the up-down direction, as long as it is ensured that the distance between the first conveyor line 10 and the second conveyor line 20 is equal everywhere.

Exemplarily, as shown in fig. 3, the first and

second conveyor lines

10 and 20 respectively include a plurality of carriers and a plurality of links 111. The bearing parts are connected to the top of the chain link 11, the bearing parts are connected in sequence, and bearing surfaces are formed on the upper surfaces of the bearing parts and used for bearing materials. The plurality of chain links 111 are pivotally connected in turn to form the chain 11, and each chain link 111 is provided with a chain slot 112, and teeth of the transmission gear 32 are meshed with the chain slot 112, so that the transmission gear 32 forms a chain transmission with the chain 11 of the first conveying line 10 and the chain 11 of the second conveying line 20 respectively.

The transmission gear 32 is disposed between the first conveyor line 10 and the second conveyor line 20, and teeth of the transmission gear 32 are respectively engaged with the chain of the first conveyor line 10 and the chain of the second conveyor line 20, so that the transmission gear 32 forms a chain transmission with the chain of the first conveyor line 10 and the chain of the second conveyor line 20. It can be understood that, since the moving directions of the first conveyor line 10 and the second conveyor line 20 are opposite, that is, there is a speed difference between the first conveyor line 10 and the second conveyor line 20, the transmission gear 32 is rotatable under the transmission of the first conveyor line 10 and the second conveyor line 20. For example, in the example shown in fig. 1, the first conveyor line 10 moves in a left-to-right direction, the second conveyor line 20 moves in a right-to-left direction, and the transmission gear 32 rotates clockwise in the drawing by the first conveyor line 10 and the second conveyor line 20.

The transmission gear 32 is movably arranged between the first conveying line 10 and the second conveying line 20, that is, in the case that the speed difference between the first conveying line 10 and the second conveying line 20 is not zero, the transmission gear 32 can move in the same direction as the moving direction of the first conveying line 10 or in the same direction as the moving direction of the second conveying line 20, so as to drive the material transfer mechanism 30 to move between the first conveying line 10 and the second conveying line 20. Specifically, in the case where the moving speed of the first conveyor wire 10 is greater than the moving speed of the second conveyor wire 20, that is, the direction of the speed difference between the first conveyor wire 10 and the second conveyor wire 20 is the same as the moving direction of the first conveyor wire 10, the transmission gear 32 moves in the same direction as the moving direction of the first conveyor wire 10. In the case where the moving speed of the first conveyor wire 10 is lower than the moving speed of the second conveyor wire 20, i.e., the direction of the speed difference between the first conveyor wire 10 and the second conveyor wire 20 is the same as the moving direction of the second conveyor wire 20, the transmission gear 32 moves in the same direction as the moving direction of the second conveyor wire 20. It will be appreciated that the drive gear 32 only rotates but does not displace when the speed difference between the first feed line 10 and the second feed line 20 is zero.

Therefore, through adjusting the movement speed of first transfer chain 10 and second transfer chain 20 in order to form the speed difference, can control material transfer mechanism 30 and take place the displacement between first transfer chain 10 and second transfer chain 20 to adjust the position of material transfer mechanism 30 relative first transfer chain 10 and second transfer chain 20, and then adjust the length of carrying of material on first transfer chain 10 and second transfer chain 20, adjust the dwell time of material on first transfer chain 10 and second transfer chain 20, realize the purpose of temporarily storing the material buffering. It is understood that the adjustment of the moving speed of the first conveyor line 10 and the second conveyor line 20 can be realized by adjusting the output rotating speed of a driving mechanism (e.g., a motor) for driving the first conveyor line 10 and the second conveyor line 20 to move.

The flexible belt 35 is tensioned between the driving wheel 33 and the driven wheel 34, and forms a flexible belt 35 transmission with the driving wheel 33 and the driven wheel 34. Wherein the portion of the flexible belt 35 that abuts against the driven pulley 34 is adapted to move in a direction from the first conveyor line 10 to the second conveyor line 20, so that the material on the first conveyor line 10 is transferred from the first conveyor line 10 to the second conveyor line 20 from the gap between the flexible belt 35 and the driven pulley 34 by the flexible belt 35.

The flexible belt 35 may be a transmission belt supported by other flexible materials such as a belt, as long as it is sufficient to form a friction-type belt transmission with the driving pulley 33 and the driven pulley 34.

Illustratively, as shown in FIG. 1, the outer surface of the flexible belt 35 is disposed in abutment with the driving surfaces of the driving pulley 33 and the driven pulley 34, respectively. The driving wheel 33 is coaxially connected with the transmission gear 32, the driving wheel 33 is driven by the transmission gear 32 to synchronously rotate along the clockwise direction, the flexible belt 35 is driven by the driving wheel 33 to rotate along the anticlockwise direction, and the driven wheel 34 is driven by the flexible belt 35 to rotate along the clockwise direction.

It should be noted that the material conveying device 1 according to the embodiment of the present application may be used in a product production line, and the conveying device is used for conveying materials from an upstream device to a downstream device, wherein the first conveying line 10 is connected to a material output end of the upstream device, and the second conveying line 20 is connected to a material input end of the downstream device.

In one particular example, the material conveying apparatus 1 may be used in a dairy production line. Specifically, the material conveying device 1 may be disposed between the filling machine and the straw machine, and is configured to convey the material output by the filling machine to the straw machine. Wherein, the material can be the milk package, and the liquid filling machine is used for infusing liquid milk to the milk package, and the straw machine is used for pasting the straw on the milk package.

According to the material conveying device 1 of the embodiment of the application, by arranging the first conveying line 10, the second conveying line 20 and the material transfer mechanism 30, when the downstream equipment fails, the relative position of the material transfer mechanism 30 can be adjusted by adjusting the movement speed of the first conveying line 10 and the second conveying line 20, so that the conveying length of the first conveying line 10 and the second conveying line 20 is prolonged, the residence time of materials on the first conveying line 10 and the second conveying line 20 is prolonged, the upstream equipment does not need to stop during the process, and after the failure of the downstream equipment is eliminated, the material conveying device 1 conveys the materials to the downstream equipment. Therefore, the material conveying device 1 can buffer and temporarily store materials between the upstream equipment and the downstream equipment, the stop times of the upstream equipment are reduced, and the normal operation time of the upstream equipment is ensured, so that the effects of adjusting the production line speed and ensuring the efficient operation of the production line are achieved.

In one embodiment, as shown in fig. 1, the material transfer mechanism 30 further includes a support 31, and the transmission gear 32, the driving wheel 33 and the driven wheel 34 are disposed on the support 31.

In one example, the material conveying apparatus 1 further includes a rail provided below the first conveying line 10 and the second conveying line 20, and the support 31 is supported on the rail and can slide along the rail. Wherein the track is arranged in a direction parallel to the first and

second conveyor lines

10 and 20. The transmission gear 32, the drive gear, and the driven gear are rotatably provided in the carrier 31. The driving gear rotates under the driving of the first conveying line 10 and the second conveying line 20 and moves in a direction parallel to the first conveying line 10 or the second conveying line 20, and the support 31 moves under the driving of the driving gear, so that the overall movement of the material transfer mechanism 30 is realized.

In one embodiment, as shown in fig. 2, the material transfer mechanism 30 further includes an adjusting portion 36, the adjusting portion 36 is disposed on the bracket 31 and is adjacent to the first conveying line 10, and the adjusting portion 36 includes a roller 361, and the roller 361 tensions the flexible belt 35 to adjust an included angle between the flexible belt 35 and a moving direction of the first conveying line 10.

Illustratively, the adjusting portion 36 is disposed on a side of the first conveyor line 10 away from the second conveyor line 20, and the roller 361 of the adjusting portion 36 tensions the flexible belt 35 to adjust an angle between a portion of the flexible belt 35 between the roller 361 and the driven wheel 34 and a moving direction of the first conveyor line 10. Therefore, the contact area of the materials on the first conveying line 10 when the materials are in contact with the flexible belt 35 in the conveying process can be adjusted, so that the pressure of the flexible belt 35 on the materials is adjusted, and the materials are prevented from being damaged due to extrusion of the flexible belt 35 caused by overlarge pressure.

Optionally, the angle between the flexible belt 35 and the direction of movement of the first conveyor line 10 is 0-45 degrees. In other words, the angle between the portion of the flexible belt 35 between the roller 361 and the driven pulley 34 and the direction of movement of the first conveyor line 10 is adjustable between 0 and 45 degrees.

It will be appreciated that the smaller the angle between the portion of the flexible belt 35 between the roller 361 and the driven pulley 34 and the direction of movement of the first conveyor line 10, the larger the contact area of the material with the flexible belt 35 and the lower the pressure of the flexible belt 35 on the material.

By arranging the adjusting part 36 on the bracket 31 and tensioning the flexible belt 35 by the roller 361 of the adjusting part 36, the included angle between the part of the flexible belt 35, which is positioned between the roller 361 and the driven wheel 34, and the moving direction of the first conveying line 10 can be adjusted by the adjusting part 36 according to the hardness and the pressure resistance of the material, so that on one hand, the protection effect on the material can be improved in the process of transferring the material, and the quality of the material can be ensured; on the other hand, the condition that the flexible belt 35 is blocked after the materials are dumped can be avoided, and the stability and the reliability of the material transfer mechanism 30 are ensured.

In one embodiment, as shown in fig. 2, the adjusting portion 36 further includes a mounting member 362, the roller 361 is rotatably disposed on the mounting member 362, the mounting member 362 is disposed on the bracket 31, and the length of the mounting member 362 extending from the bracket 31 is adjustable.

In one example, the mounting member 362 may be fixed to the bracket 31 by a fastener, and the bracket 31 may be provided with a plurality of mounting holes adapted to be connected to the fastener, the plurality of mounting holes being spaced apart, and the mounting member 362 being connected to different mounting holes by the fastener, so as to adjust the length of the mounting member 362 extending out of the bracket 31, thereby changing the position of the roller 361 relative to the driven pulley 34, and thus adjusting the angle between the portion of the flexible belt 35 between the roller 361 and the driven pulley 34 and the moving direction of the first conveyor line 10.

In another example, the mounting member 362 is slidably disposed on the bracket 31, and the length of the mounting member 362 extending out of the bracket 31 is adjusted by sliding the mounting member 362 relative to the bracket 31.

In one embodiment, as shown in fig. 1 and 2, the material transfer mechanism 30 further includes a tension wheel 37, a plurality of tension wheels 37 are rotatably disposed on the bracket 31, and the flexible belt 35 is sleeved on the plurality of tension wheels 37.

Optionally, the plurality of tensioning wheels 37 comprises a first tensioning wheel 371, a second tensioning wheel 372, a third tensioning wheel 373, and a fourth tensioning wheel 374. Specifically, the first tensioning wheel 371 and the second tensioning wheel 372 are respectively disposed on two opposite sides of the driving wheel 33, and the first tensioning wheel 371 and the second tensioning wheel 372 are disposed on a side of the rotation center of the driving wheel 33 away from the driven wheel 34, so that the outer side surface of the flexible belt 35 is attached to the driving surface of the driving wheel 33. The third tensioning wheel 373 and the fourth tensioning wheel 374 are respectively disposed on opposite sides of the driven wheel 34, and the third tensioning wheel 373 and the fourth tensioning wheel 374 are disposed on a side of the rotation center of the driven wheel 34 away from the driving wheel 33, so that the outer side surface of the flexible belt 35 is attached to the driving surface of the driven wheel 34. Thus, the flexible belt 35 can be stretched between the driving pulley 33 and the driven pulley 34, and the outer surface of the flexible belt 35 can be attached to the transmission surfaces of the driving pulley 33 and the driven pulley 34, respectively.

In one embodiment, the material transfer mechanism 30 further includes a material support plate 38 disposed between the first conveyor line and the second conveyor line, the material support plate 38 being attached to the bracket 31 and positioned below the driven wheel 34.

For example, the material support plate 38 may be provided in a fan-ring shape and may be disposed to correspond to a portion of the flexible belt 35 that abuts against the driven pulley 34 in the up-down direction. The end of the material supporting plate 38 adjacent to the first conveyor line 10 is arranged flush with the first conveyor line 10 and the end of the material supporting plate 38 adjacent to the second conveyor line 20 is arranged flush with the second conveyor line 20. From this, the material is by the flexible band 35 and the in-process that shifts from the clearance between the driving wheel 34, through setting up material backup pad 38, can play the effect that supports the material, avoids the material to take place at the condition that shifts the in-process and drop.

Optionally, the material support plate 38 is arranged inclined downwards in the direction from the first conveyor line to the second conveyor line.

Illustratively, the bearing surface of the first conveyor line 10 is arranged higher than the bearing surface of the second conveyor line 20, the material support plate 38 is correspondingly arranged obliquely, and one end of the material support plate 38 adjacent to the first conveyor line 10 is arranged flush with the bearing surface of the first conveyor line 10, and one end of the material support plate 38 adjacent to the second conveyor line 20 is arranged flush with the bearing surface of the second conveyor line 20. Therefore, the materials can slide from the first conveying line 10 to the second conveying line 20 on the material supporting plate 38 through self gravity, so that the load transferred by the flexible belt 35 is reduced, and the material transfer efficiency is improved.

Other configurations of the material conveying device 1 of the above-described embodiment can be adopted by various technical solutions known to those skilled in the art now and in the future, and will not be described in detail here.

In the description of the present specification, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The above disclosure provides many different embodiments or examples for implementing different structures of the application. The components and arrangements of specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present application, and these should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A material transfer device, comprising:

the first conveying line and the second conveying line are arranged at intervals and have opposite movement directions;

the material transfer mechanism is movably arranged between the first conveying line and the second conveying line and comprises a transmission gear, a driving wheel, a driven wheel and a flexible belt, the transmission gear is in transmission connection with the first conveying line and the second conveying line, the driving wheel is in transmission connection with the transmission gear, the flexible belt is tensioned between the driving wheel and the driven wheel to form flexible belt transmission, and materials on the first conveying line are transferred to the second conveying line through a gap between the flexible belt and the driven wheel.

2. The material conveying device according to claim 1, wherein the material transfer mechanism further comprises a support, and the transmission gear, the driving wheel and the driven wheel are all arranged on the support.

3. The material transfer device of claim 2, wherein the material transfer mechanism further includes an adjustment portion disposed on the support and adjacent to the first conveyor line, the adjustment portion including a roller that tensions the flexible belt to adjust an included angle between the flexible belt and a direction of movement of the first conveyor line.

4. The material conveying device according to claim 3, wherein an included angle between the flexible belt and the moving direction of the first conveying line is 0-45 degrees.

5. The material conveying device according to claim 3, wherein the adjusting portion further comprises a mounting member, the roller is rotatably provided on the mounting member, the mounting member is provided on the bracket, and the length of the mounting member extending from the bracket is adjustable.

6. The material conveying apparatus according to claim 2, wherein the material transfer mechanism further comprises a plurality of tension pulleys rotatably provided to the frame, and the flexible belt is fitted over the plurality of tension pulleys.

7. The material conveying apparatus according to claim 6, wherein the plurality of tension pulleys includes a first tension pulley, a second tension pulley, a third tension pulley, and a fourth tension pulley, and the first tension pulley and the second tension pulley are provided on a side of a rotation center of the driving pulley away from the driven pulley so that an outer side surface of the flexible belt is in contact with a driving surface of the driving pulley; the third tensioning wheel and the fourth tensioning wheel are arranged on one side, far away from the driving wheel, of the rotation center of the driven wheel, so that the outer side surface of the flexible belt is attached to the transmission surface of the driven wheel.

8. The material transfer device of claim 2, wherein the material transfer mechanism further includes a material support plate disposed between the first conveyor line and the second conveyor line, the material support plate being connected to the bracket and positioned below the driven wheel.

9. The material transfer device of claim 8, wherein the material support plate is disposed obliquely downward in a direction from the first transfer line to the second transfer line.