Circular feeding equipment suitable for shaft parts of centerless grinding machine

Abstract

The utility model discloses circular feeding equipment suitable for shaft parts of a centerless grinding machine. Comprising a rack, an upper-layer synchronous belt line assembly, an up-and-down material rotating device, a lower-layer synchronous belt line assembly, a push plate material ejecting device, a V-shaped synchronous belt material rotating machine, a feeding driving motor, a blowing air dryer, a second feeding V wheel, a material rotating in-place detection switch and a lower-layer arriving material detection switch. The double-sided tooth synchronous belt and the V-shaped synchronous belt are adopted as main conveying media, the conveying stability is guaranteed on the premise that the conveying precision is guaranteed, a two-stage material pushing mode is adopted by the upper material rotating device and the lower material rotating device, the surfaces of ground workpieces can be protected on the premise of stable material pushing, the workpieces are prevented from being damaged by collision, and the service life of the workpieces is prolonged. The special V-shaped feeding wheels are arranged in front of and behind the centerless grinding machine, so that the influence of an automatic receiving and feeding structure on the grinding machining precision of the centerless grinding machine is reduced, the interference of transmission power of a feeding port and a discharging port on grinding parts is reduced, and the precision of automatic grinding is improved.

Description

Technical Field

[0001] This utility model relates to the field of centerless grinding machine technology, and in particular to a circulating feeding device for shaft parts suitable for centerless grinding machines. Background Technology

[0002] A centerless grinder is a precision grinding machine with wide applications in the machining field. It is a grinder that does not require positioning the workpiece's axis; it typically grinds the workpiece using a grinding wheel. Its working principle utilizes the geometric errors of the grinding wheel on the workpiece surface to control the machining centerline, thus achieving precise machining results. During machining, the grinding wheel rotates at high speed to perform grinding, while the guide wheel rotates at a slower speed in the same direction, thereby driving the workpiece to rotate and perform circumferential feed. In through-feed grinding, axial feed is achieved by adjusting the tilt angle of the guide wheel axis, while radial feed is achieved by moving the guide wheel head or grinding wheel head during plunge grinding.

[0003] Currently, centerless grinders hold an important position in the field of machining. Their high precision, high efficiency, and high degree of automation make them indispensable processing equipment in many fields. With the continuous improvement of industrial automation and the gradual maturation of CNC technology, automatic loading and unloading, automatic measurement, and automatic screening of products have become basic requirements for automated processing. Under the premise of ensuring processing accuracy and efficiency, it is imperative to improve efficiency and upgrade intelligence through automation. Currently, centerless grinders lack a loading device that can realize the cyclic grinding of shaft parts. Summary of the Invention

[0004] The purpose of this invention is to provide a circulating feeding device for shaft parts suitable for centerless grinders, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a circulating feeding device for shaft parts suitable for centerless grinding machines, including a frame, upper and lower support columns fixedly connected to the upper surface of the frame, a lower synchronous belt assembly fixedly connected to the upper and lower support columns, an upper synchronous belt assembly at the top of the lower synchronous belt assembly, and the upper synchronous belt assembly fixedly connected to the upper and lower support columns, an upper and lower material transfer device on one side of the lower synchronous belt assembly, and a push plate ejector and a V-shaped synchronous belt feeder on the other side of the lower synchronous belt assembly.

[0006] As a further technical solution of this utility model, the upper synchronous belt assembly includes an upper double-sided toothed synchronous belt, which is fixedly connected to the upper and lower support columns. An upper drive motor is provided on one side of the upper double-sided toothed synchronous belt, and the output end of the upper drive motor is connected to the upper double-sided toothed synchronous belt. An upper transition plate is provided on one side of the upper double-sided toothed synchronous belt, and an upper material arrival detection switch is provided on the upper transition plate. The upper material arrival detection switch is fixedly connected to the frame.

[0007] As a further technical solution of this utility model, the upper and lower material transfer device includes a top material block and a receiving material block. A synchronous top material cylinder and a receiving dual-shaft cylinder are fixedly connected on the frame, and the output end of the synchronous top material cylinder is fixedly connected to the top material block, and the output end of the receiving dual-shaft cylinder is fixedly connected to the receiving material block.

[0008] As a further technical solution of this utility model, the lower layer synchronous belt assembly includes a lower layer drive motor, which is fixedly connected to the frame. The output end of the lower layer drive motor is connected to a lower layer double-sided toothed synchronous belt. A lower layer transition plate is provided at one end of the lower layer double-sided toothed synchronous belt, and the lower layer transition plate is fixedly connected to the frame. A lower layer material arrival detection switch is fixedly connected to the lower layer double-sided toothed synchronous belt.

[0009] As a further technical solution of this utility model, the pusher plate ejector device includes an ejector plate, a receiving transition plate is provided on one side of the ejector plate, and a feeding V-shaped synchronous belt is provided on one side of the receiving transition plate. Both the receiving transition plate and the feeding V-shaped synchronous belt are fixedly connected to the frame.

[0010] As a further technical solution of this utility model, the V-shaped synchronous belt feeder includes a feeding drive motor, which is fixedly connected to the frame. The output end of the feeding drive motor is fixedly connected to the feeding V-shaped synchronous belt. A feeding detection switch is provided on one side of the feeding drive motor, and the feeding detection switch is fixedly connected to the frame.

[0011] As a further technical solution of this utility model, a V-shaped synchronous belt material transfer machine is fixedly connected to the frame, a material transfer drive motor is fixedly connected to one side of the outer wall of the V-shaped synchronous belt material transfer machine, a second feeding V-wheel and a material transfer position detection switch are fixedly connected to the V-shaped synchronous belt material transfer machine, and an air blowing dryer is provided on one side of the V-shaped synchronous belt material transfer machine, and the air blowing dryer is fixedly connected to the frame.

[0012] As a further technical solution of this utility model, a material transfer V-shaped synchronous belt is provided on one side of the air dryer, and a first feeding V-wheel is provided on one side of the material transfer V-shaped synchronous belt, and both the material transfer V-shaped synchronous belt and the first feeding V-wheel are fixedly connected to the frame.

[0013] Compared with existing technologies, the beneficial effects achieved by this utility model are as follows: This utility model uses double-sided toothed synchronous belts and V-shaped synchronous belts as the main conveying media, ensuring conveying stability while guaranteeing conveying accuracy. Furthermore, the upper and lower material transfer devices adopt a two-stage pushing method, protecting the surface of the ground workpiece and preventing damage while ensuring smooth material feeding. By providing dedicated feed V-wheels before and after entering and exiting the centerless grinder, the impact of the automatic feeding and receiving structure on the grinding accuracy of the centerless grinder is reduced, and interference from the transmission power at the feed and discharge ports on the grinding parts is minimized, thus improving the accuracy of automated grinding. Centralized integrated control is adopted, integrating feeding and receiving control... The components are concentrated in one control area, which facilitates operation, debugging, and subsequent maintenance and repair. While ensuring normal adjustment and use, it is more aesthetically pleasing and easier to operate. The rear part blowing cleaning device effectively reduces the interference of water stains and other impurities on the operation of automated equipment. At the same time, it retains grinding fluid inside the machine tool, reducing the impact of grinding fluid on other structures of the equipment, lowering the equipment failure rate, and improving the service life of the equipment. Furthermore, each control link adopts sensor feedback signals and mechanical limit switches, ensuring the safety of the equipment in the event of sensor failure or malfunction. Centralized control also facilitates troubleshooting and reduces maintenance costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the upper synchronous belt assembly of this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the upper and lower material transfer device of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the lower synchronous belt assembly of this utility model;

[0019] Figure 5 This is a three-dimensional structural diagram of the pusher plate ejector device of this utility model;

[0020] Figure 6 This is a three-dimensional structural diagram of the V-type synchronous belt feeder of this utility model;

[0021] Figure 7 This is a three-dimensional structural diagram of the V-shaped synchronous belt transfer machine of this utility model.

[0022] In the diagram: 1. Frame; 2. Upper synchronous belt conveyor assembly; 3. Upper and lower material transfer device; 4. Lower synchronous belt conveyor assembly; 5. Push plate ejector device; 6. V-type synchronous belt feeder; 7. V-type synchronous belt transfer machine; 8. Upper drive motor; 9. Upper double-sided toothed synchronous belt; 10. Upper transition plate; 11. Upper and lower support columns; 12. Upper material arrival detection switch; 13. Ejector block; 14. Receiving block; 15. Synchronous ejector cylinder; 16. Receiving dual-shaft cylinder ; 17. Lower layer drive motor; 18. Lower layer double-sided toothed synchronous belt; 19. Lower layer transition plate; 20. Top material push plate; 21. Receiving transition plate; 22. Feeding V-shaped synchronous belt; 23. Feeding drive motor; 24. Feeding detection switch; 25. Transfer drive motor; 26. First feeding V-wheel; 27. Transfer V-shaped synchronous belt; 28. Air blowing dryer; 29. ​​Second feeding V-wheel; 30. Transfer position detection switch; 31. Lower layer material arrival detection switch. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Please see the appendix Figure 1 -Attached Figure 7This utility model provides an embodiment of a circulating feeding device for shaft parts suitable for centerless grinding machines, comprising a frame 1, upper and lower support columns 11 fixedly connected to the upper surface of the frame 1, a lower synchronous belt assembly 4 fixedly connected to the upper and lower support columns 11, an upper synchronous belt assembly 2 disposed at the top of the lower synchronous belt assembly 4, and the upper synchronous belt assembly 2 fixedly connected to the upper and lower support columns 11, an upper and lower transfer device 3 disposed on one side of the lower synchronous belt assembly 4, and a push plate ejector device 5 and a V-shaped synchronous belt feeder 6 disposed on the other side of the lower synchronous belt assembly 4; the upper synchronous belt assembly 2 includes an upper double-sided toothed synchronous belt 9, and the upper double-sided toothed synchronous belt 9 is fixedly connected to the upper and lower support columns 11. An upper drive motor 8 is installed on one side of the upper double-sided toothed synchronous belt 9, and the output end of the upper drive motor 8 is connected to the upper double-sided toothed synchronous belt 9. An upper transition plate 10 is installed on one side of the upper double-sided toothed synchronous belt 9, and an upper material arrival detection switch 12 is installed on the upper transition plate 10. The upper material arrival detection switch 12 is fixedly connected to the frame 1. The upper drive motor 8 is used to drive the upper double-sided toothed synchronous belt 9, and the upper transition plate 10 is used for material feeding transition of the upper double-sided toothed synchronous belt 9. The upper and lower material transfer device 3 includes a top material block 13 and a receiving block 14. A synchronous top material cylinder 15 and a receiving dual-shaft cylinder 16 are fixedly connected to the frame 1, and the output end of the synchronous top material cylinder 15 is fixedly connected to the top material block 13. The output end of cylinder 16 is fixedly connected to receiving block 14. Synchronous ejector cylinder 15 is used to drive ejector block 13, and receiving dual-shaft cylinder 16 is used to drive receiving block 14. The lower synchronous belt assembly 4 includes a lower drive motor 17, which is fixedly connected to frame 1. The output end of the lower drive motor 17 is connected to a lower double-sided toothed synchronous belt 18. One end of the lower double-sided toothed synchronous belt 18 is provided with a lower transition plate 19, which is fixedly connected to frame 1. A lower material arrival detection switch 31 is fixedly connected to the lower double-sided toothed synchronous belt 18 for detecting material arrival. The lower drive motor 17 is used to drive the lower double-sided toothed synchronous belt 18. Push plate ejector device 5 The system includes a top pusher plate 20, a receiving transition plate 21 on one side of the top pusher plate 20, and a feeding V-shaped synchronous belt 22 on one side of the receiving transition plate 21. Both the receiving transition plate 21 and the feeding V-shaped synchronous belt 22 are fixedly connected to the frame 1. The receiving transition plate 21 is used for receiving and transitioning materials. The V-shaped synchronous belt feeder 6 includes a feeding drive motor 23, which is fixedly connected to the frame 1. The output end of the feeding drive motor 23 is fixedly connected to the feeding V-shaped synchronous belt 22. A feeding detection switch 24 is provided on one side of the feeding drive motor 23 and is fixedly connected to the frame 1. The feeding detection switch 24 is used for feeding detection, and the feeding drive motor 23 is used to drive the feeding V-shaped synchronous belt 22.A V-shaped synchronous belt transfer machine 7 is fixedly connected to the frame 1. A transfer drive motor 25 is fixedly connected to one outer wall of the V-shaped synchronous belt transfer machine 7. A second feeding V-wheel 29 and a transfer position detection switch 30 are fixedly connected to the V-shaped synchronous belt transfer machine 7. An air-blowing dryer 28 is provided on one side of the V-shaped synchronous belt transfer machine 7 and is fixedly connected to the frame 1. The air-blowing dryer 28 is used to blow away grinding fluid and impurities from the surface of the parts. A transfer V-shaped synchronous belt 27 is provided on one side of the air-blowing dryer 28. A first feeding V-wheel 26 is provided on one side of the transfer V-shaped synchronous belt 27. Both the transfer V-shaped synchronous belt 27 and the first feeding V-wheel 26 are fixedly connected to the frame 1. The first feeding V-wheel 26 is used to feed the transfer V-shaped synchronous belt 27.

[0025] Working Principle: When using this invention, the first step is to manually place the workpieces to be ground evenly onto the upper synchronous belt assembly 2 on the upper and lower support columns 11 of the circulating feeding device within the feeding area. Different workpiece sizes can accommodate different quantities. Due to the limitations of the clamping robot, the distance between each pair of workpieces, D1, is ≤12mm. Taking a workpiece with a diameter D=Ø10mm and a length L=330mm as an example, approximately 50 workpieces can be accommodated in one grinding cycle. The second step is to start the equipment after the workpieces are placed; the PLC system controls the upper drive motor 8 to drive the upper... The double-sided toothed synchronous belt 9 moves in the direction of the upper and lower material transfer device 3 by D2, where D2 = (D1 + D / 2) mm; the last part to be ground, a1, passes the upper material arrival detection switch 12, which inputs a signal to the PLC system. The PLC system controls the receiving dual-axis cylinder 16 to push out, adjusting the receiving block 14 to the receiving state; at the same time, the synchronous ejection cylinder 15 is delayed and pushed out after t seconds, where t = the actual time it takes for the part to reach the end of the upper double-sided toothed synchronous belt 9. After passing the upper material arrival detection switch 12, part a1 slides over the upper transition plate 10 to reach the end of the upper double-sided toothed synchronous belt 9, and the synchronous ejection cylinder... 15. The control top material block 13 pushes part a1 upwards, and part a1 falls into the receiving position of the receiving block 14. The synchronous top material cylinder 15 retracts after one second, and the control top material block 13 falls back below the upper transition plate 10, preparing to push out the next part a2. After part a1 falls into the receiving position of the receiving block 14, the receiving dual-axis cylinder 16 retracts, and part a1 falls through the lower transition plate 19 and is placed in the feeding area of ​​the lower double-sided toothed synchronous belt 18. One second after the receiving dual-axis cylinder 16 retracts, the PLC system controls the lower drive motor 17 to run in the direction D2 towards the push plate top material device 5. One second later, the receiving dual-axis cylinder 16 pushes out, preparing to catch. Next part a2; this step is a single part up-and-down material transfer cycle; third step, repeat the second step of single workpiece up-and-down material transfer cycle until part a1 reaches the lower synchronous belt assembly 4 and triggers the lower material arrival detection switch 31, stop the second step cycle, and enter the fourth step; fourth step, the dual-axis top material cylinder inside the frame 1 is normally in the retracted state. One second after part a1 reaches and triggers the lower material arrival detection switch 31, the PLC system controls the dual-axis top material cylinder inside the frame 1 to push out, driving the top material push plate 20 to push part a1 into the receiving transition plate 21. One second later, the dual-axis top material cylinder inside the frame 1 retracts, ready for the next push out;Part a1 falls onto the feeding V-belt 22 via the receiving transition plate 21. After the equipment starts, the feeding drive motor 23 of the V-belt feeder 6 runs, driving the feeding V-belt 22 and maintaining its operation. After part a1 falls onto the feeding V-belt 22, it moves along with the feeding V-belt 22 past the feeding detection switch 24, triggering the switch and indicating that the feeding V-belt 22 is currently loaded. The signal is fed back to the PLC system, which controls the dual-axis ejector cylinder inside the frame 1 to prevent ejection. Part a1 continues to move with the feeding V-belt 22, entering the centerless grinder's grinding area to begin grinding. At this point, part a1 leaves the detection area of ​​the feeding detection switch 24. The signal interruption indicates no material, and the signal is fed back to the PLC system. The PLC system controls the dual-axis ejector cylinder inside the frame 1 to push out, driving the ejector plate 20 to push part a2 into the receiving transition plate 21 and then into the feeding V-belt 22. The feeding detection switch 24 is then triggered accordingly, and this cycle repeats. This step is a single part ejector plate transfer cycle. In the fifth step, after part a1 is ground in the centerless grinder's grinding area, it enters the first feeding V-wheel 26 at the feeding end of the V-belt transfer machine 7 with the running power of the centerless grinder. After the V-belt transfer machine 7 is started, it operates normally. The transfer drive motor 25 runs, driving the sprocket to drive the transmission chain to transmit power to the second feeding V-wheel 29. Power is transmitted to the transfer V-belt 27. The driven wheel of the transfer V-belt 27 drives the first feeding V-wheel 26 to rotate via chain drive. The rotation of the first feeding V-wheel 26 drives part a1 into the transfer V-belt 27. When part a1 triggers the detection switch before the air dryer 28, the PLC system controls the air dryer 28 to start blowing air, removing grinding fluid and impurities from the surface of part a1. When part a1 continues to move and leaves the detection area of ​​the detection switch, the PLC system controls the air dryer 28 to stop blowing air. Part a1 continues to move and enters the second feeding V-wheel 29. When it reaches the detection area of ​​the transfer completion detection switch 30, part a1 is restricted by the end limit structure and stops moving. The positioning detection switch 30 sends a signal to the PLC system. The PLC system controls the robotic gripper of the centerless grinder to pick up part a1 and place it back into the feeding area of ​​the upper double-sided toothed synchronous belt 9 on the circulating feeding device. After placement, the robotic gripper returns to the top of the positioning detection switch 30, ready for the next clamping, and this cycle repeats; this step is a single part clamping and transferring cycle. The sixth step repeats steps one through five until all placed parts have been ground once, checking the grinding effect and dimensional changes to prepare for the next cycle; this step is a single grinding cycle. The seventh step repeats step six until the part is ground to the required dimensions, completing the through-feed grinding process of the centerless grinder.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A circulating feeding device for shaft parts suitable for centerless grinding machines, comprising a frame (1), characterized in that: The upper surface of the frame (1) is fixedly connected with upper and lower support columns (11), and the lower synchronous belt assembly (4) is fixedly connected to the upper and lower support columns (11). The upper synchronous belt assembly (2) is provided at the top of the lower synchronous belt assembly (4), and the upper synchronous belt assembly (2) is fixedly connected to the upper and lower support columns (11). The lower synchronous belt assembly (4) is provided with an upper and lower material transfer device (3) on one side, and a push plate material lifting device (5) and a V-shaped synchronous belt feeder (6) are provided on the other side of the lower synchronous belt assembly (4).

2. The circulating feeding device for shaft parts suitable for centerless grinding machines according to claim 1, characterized in that: The upper synchronous belt assembly (2) includes an upper double-sided toothed synchronous belt (9), and the upper double-sided toothed synchronous belt (9) is fixedly connected to the upper and lower support columns (11). An upper drive motor (8) is provided on one side of the upper double-sided toothed synchronous belt (9), and the output end of the upper drive motor (8) is connected to the upper double-sided toothed synchronous belt (9). An upper transition plate (10) is provided on one side of the upper double-sided toothed synchronous belt (9), and an upper material arrival detection switch (12) is provided on the upper transition plate (10), and the upper material arrival detection switch (12) is fixedly connected to the frame (1).

3. A circulating feeding device for shaft parts suitable for centerless grinding machines according to claim 1, characterized in that: The upper and lower material transfer device (3) includes a top material block (13) and a receiving block (14). A synchronous top material cylinder (15) and a receiving dual-shaft cylinder (16) are fixedly connected on the frame (1). The output end of the synchronous top material cylinder (15) is fixedly connected to the top material block (13), and the output end of the receiving dual-shaft cylinder (16) is fixedly connected to the receiving block (14).

4. A circulating feeding device for shaft parts suitable for centerless grinding machines according to claim 1, characterized in that: The lower synchronous belt assembly (4) includes a lower drive motor (17), which is fixedly connected to the frame (1). The output end of the lower drive motor (17) is connected to a lower double-sided toothed synchronous belt (18). A lower transition plate (19) is provided at one end of the lower double-sided toothed synchronous belt (18), which is fixedly connected to the frame (1). A lower material arrival detection switch (31) is fixedly connected to the lower double-sided toothed synchronous belt (18).

5. A circulating feeding device for shaft parts suitable for centerless grinding machines according to claim 1, characterized in that: The pusher plate feeding device (5) includes a feeding pusher plate (20), a receiving transition plate (21) is provided on one side of the feeding pusher plate (20), and a feeding V-shaped synchronous belt (22) is provided on one side of the receiving transition plate (21). The receiving transition plate (21) and the feeding V-shaped synchronous belt (22) are both fixedly connected to the frame (1).

6. A circulating feeding device for shaft parts suitable for centerless grinding machines according to claim 1, characterized in that: The V-shaped synchronous belt feeder (6) includes a feeding drive motor (23), which is fixedly connected to the frame (1). The output end of the feeding drive motor (23) is fixedly connected to the feeding V-shaped synchronous belt (22). A feeding detection switch (24) is provided on one side of the feeding drive motor (23), and the feeding detection switch (24) is fixedly connected to the frame (1).

7. A circulating feeding device for shaft parts suitable for centerless grinding machines according to claim 6, characterized in that: A V-shaped synchronous belt transfer machine (7) is fixedly connected to the frame (1). A transfer drive motor (25) is fixedly connected to one side of the outer wall of the V-shaped synchronous belt transfer machine (7). A second feed V-wheel (29) and a transfer position detection switch (30) are fixedly connected to the V-shaped synchronous belt transfer machine (7). An air blower (28) is provided on one side of the V-shaped synchronous belt transfer machine (7), and the air blower (28) is fixedly connected to the frame (1).

8. A circulating feeding device for shaft parts suitable for centerless grinding machines according to claim 7, characterized in that: The air dryer (28) is provided with a material transfer V-shaped synchronous belt (27) on one side, and a first feeding V-wheel (26) is provided on one side of the material transfer V-shaped synchronous belt (27). Both the material transfer V-shaped synchronous belt (27) and the first feeding V-wheel (26) are fixedly connected to the frame (1).

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