Copper strip blank surface milling device

By using a servo motor-driven transmission system and a combination of various mechanisms, the problems of adaptability of the copper strip milling device and low copper chip recovery rate were solved, achieving stable milling of copper strips and efficient copper chip recovery.

CN121551678AInactive Publication Date: 2026-02-24YINGTAN XINGYEELECTRONIC METAL MATERIAL CO LTD
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Patent Information

Application Number
CN202610008359.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-06
Publication Date
2026-02-24
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing copper strip milling equipment is not suitable for adapting to copper strips of different sizes. The unidirectional milling force generated during milling causes movement and shaking, and burrs are easily generated on the surface of the copper strip, resulting in low copper chip recovery rate and efficiency.

Method used

The conveyor system, driven by a servo motor, combined with a limiting mechanism, a milling mechanism, a burr cutting mechanism, and a waste cleaning mechanism, enables stable milling of copper strip blanks of different sizes and efficient copper shavings recycling.

Benefits of technology

It improves the stability and quality of the milled surface of copper strip blanks, reduces burr residue, and increases the recovery rate and efficiency of copper chips.

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Abstract

The invention relates to the field of metal processing, in particular to a copper strip blank surface milling device. The technical problems that according to an existing copper strip blank surface milling device, after the surface of a copper strip blank is milled, burrs are likely to be generated on the side edge of the copper strip blank, and milled copper cuttings are inconvenient to recycle are solved. The invention discloses a copper strip blank surface milling device which comprises a frame body, a servo motor, a driving roller and the like, a servo motor is installed on the frame body, a driving roller is rotationally connected to the frame body, an output shaft of the servo motor is connected with the driving roller, a transmission roller is rotationally connected to the frame body, and a conveying belt is connected between the driving roller and the transmission roller. The copper strip blank machining device is convenient to adapt to machining of copper strip blanks with different widths, the machining adaptability of the copper strip blanks with different widths is improved, the two movable frames effectively clamp and limit the copper strip blanks, huge one-way milling force is counteracted, the copper strip blanks to be milled are prevented from moving and shaking, and the machining efficiency is improved. And the copper strip blank is more stable during machining, and the surface milling quality of the copper strip blank is improved.
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Description

Technical Field

[0001] This invention relates to the field of metal processing, and more particularly to a milling device for copper strip blanks. Background Technology

[0002] After rolling, copper strip blanks may have defects such as oxide layer, fine scratches, and oil stains on their surface, which will affect subsequent electroplating, welding or stamping. Copper strip blank milling device is a machine that smooths the surface of copper strip blanks by rotating a milling cutter on the surface of the copper strip blank.

[0003] Existing copper strip milling devices are not suitable for milling copper strips of different sizes. When the milling cutter mills the copper strip, it generates a huge unidirectional milling force, causing the copper strip to move and shake. Furthermore, after milling, burrs are easily generated on the side of the copper strip, which affects the milling quality. The copper chips produced by milling are not easy to recycle, resulting in a low recycling rate and efficiency. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned background technology, the present invention provides a copper strip blank milling device, which can adapt to the milling of copper strip blanks of different sizes, improve the stability of milling copper strip blanks, facilitate the cutting of burrs and rough edges generated by milling on both sides of the copper strip blank, and facilitate the cleaning and collection of copper chips under milling.

[0005] The technical implementation of the present invention is as follows: a copper strip milling device includes a frame, a servo motor, a drive roller, a transmission roller and a conveyor belt. The servo motor is mounted on the frame, the drive roller is rotatably connected to the frame, the output shaft of the servo motor is connected to the drive roller, the transmission roller is rotatably connected to the frame, and a conveyor belt is connected between the drive roller and the transmission roller.

[0006] As a further preferred option, the frame is equipped with two discharge ports, which are symmetrically arranged. Copper strip blanks are placed on the conveyor belt, which can drive the copper strip blanks to move horizontally.

[0007] As a further preferred embodiment, a milling mechanism is also included. The milling mechanism is mounted on a frame and includes a drive motor, a rotating shaft, a milling cutter head, a support frame, pressure rollers, and meshing gears. The drive motor is mounted on the frame, and the rotating shaft is rotatably connected to the frame. The output shaft of the drive motor is connected to the rotating shaft, and the milling cutter head is mounted on the rotating shaft. The support frame is fixedly connected to the frame and is located between the drive roller and the transmission roller. The support frame contacts the conveyor belt. Two pressure rollers are rotatably connected to the frame and are symmetrically arranged. Both pressure rollers are located above the copper strip blank and will contact the copper strip blank. Meshing gears are mounted on the drive roller, the transmission roller, and the two pressure rollers. The meshing gear on the drive roller meshes with the meshing gear on one pressure roller, and the meshing gear on the transmission roller meshes with the meshing gear on the other pressure roller.

[0008] As a further preferred option, the milling cutter head is equipped with several milling cutters. The milling cutter head is located above the conveyor belt. The milling cutters on the milling cutter head will mill the copper strip blank. The support frame is used to support the conveyor belt and keep the conveyor belt stable during milling.

[0009] As a further preferred embodiment, a limiting mechanism is also included. The limiting mechanism is installed on the frame and includes a movable frame, a one-way nut, a threaded rod, rack one, rack two, and a rotating gear. Two movable frames are slidably connected to the frame and are arranged symmetrically. A one-way nut is fixedly connected to one side of the frame. A threaded rod is rotatably connected to the movable frame near the one-way nut. The threaded rod is connected to the one-way nut by threads. Rack one is installed on the movable frame near the one-way nut, and rack two is installed on the other movable frame. A rotating gear is rotatably connected to the frame, and the rotating gear meshes with rack one and rack two.

[0010] As a further preferred embodiment, a burr-cutting mechanism is also included. The cutting mechanism is mounted on the frame and includes an eccentric shaft, a reciprocating frame, a connecting rod, a mounting rod, a limit rod, and a cutting blade. The eccentric shaft is mounted on the transmission roller. The reciprocating frame is slidably connected to the frame. The connecting rod is rotatably connected to the eccentric shaft. The connecting rod is rotatably connected to the reciprocating frame. Two mounting rods are slidably connected to the reciprocating frame. The two mounting rods are symmetrically arranged. Limit rods are fixedly connected to both movable frames. The two limit rods are slidably connected to the two mounting rods respectively. Cutting blades are mounted on both mounting rods. The two cutting blades are symmetrically arranged.

[0011] As a further preferred embodiment, a waste cleaning mechanism is also included. The waste cleaning mechanism is installed on the frame and includes a support plate, a brush plate, a fixed rod, a scraper, a return spring, a short rod, and a collection box. The support plate is fixedly connected to the reciprocating frame, and the brush plate is installed on the support plate. The brush plate is in contact with the conveyor belt. The fixed rod is fixedly connected to the frame, and the scraper is slidably connected to the fixed rod. The bottom of the scraper is in contact with the frame, and a return spring is connected between the scraper and the frame. The short rod is installed on the conveyor belt, and two collection boxes are slidably connected to the frame. The two collection boxes are located below the two discharge ports of the frame.

[0012] The present invention has the following advantages: the operator rotates the threaded rod until the two movable frames contact the copper strip blank, which facilitates the processing of copper strip blanks of different widths and improves the adaptability to processing copper strip blanks of different widths. The two movable frames effectively clamp and limit the copper strip blank, offsetting the huge unidirectional milling force and preventing the copper strip blank from moving and shaking during milling, making the copper strip blank more stable during processing and improving the milling surface quality of the copper strip blank.

[0013] The copper strip blank moves between and contacts the two cutting blades. The two reciprocating cutting blades cut the burrs and rough edges on both sides of the copper strip blank, reducing the residual waste after milling and improving the milling surface quality of the copper strip blank.

[0014] The reciprocating frame drives the support plate and brush plate to move back and forth. The brush plate cleans the copper shavings on the surface of the conveyor belt, reducing the amount of copper shavings adhering to the surface of the conveyor belt and preventing the copper shavings adhering to the surface of the conveyor belt from scratching the copper strip blank. The scraper scrapes the copper shavings in the frame into two collection boxes, which facilitates the cleaning and collection of the milled copper shavings, and improves the copper shavings recovery rate and recovery efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a partial three-dimensional structural diagram of the limiting mechanism of the present invention.

[0017] Figure 3 This is a schematic diagram of the split three-dimensional structure of the present invention.

[0018] Figure 4 This is a partial three-dimensional structural schematic diagram of the milling mechanism of the present invention.

[0019] Figure 5 This is a three-dimensional structural diagram of the limiting mechanism of the present invention.

[0020] Figure 6 This is a partial three-dimensional structural diagram of the waste cleaning mechanism of the present invention.

[0021] Figure 7 This is a three-dimensional structural diagram of the frame and support frame of the present invention.

[0022] Figure 8 This is a schematic diagram of the partially covered three-dimensional structure of the present invention.

[0023] Figure 9 This is a partial cross-sectional three-dimensional structural schematic diagram of the limiting mechanism of the present invention.

[0024] Figure 10 This is a partial cross-sectional three-dimensional structural schematic diagram of the burr cutting mechanism of the present invention.

[0025] Figure 11 This is a partial three-dimensional structural diagram of the burr cutting mechanism and waste cleaning mechanism of the present invention.

[0026] Figure 12 This is a partial three-dimensional structural diagram of the waste cleaning mechanism of the present invention.

[0027] Figure 13 This is a three-dimensional structural diagram of the fixing rod, scraper, and return spring of the present invention.

[0028] The components are as follows: 1-Frame, 2-Servo motor, 3-Drive roller, 4-Transmission roller, 5-Conveyor belt, 6-Copper strip blank, 71-Drive motor, 72-Rotating shaft, 73-Milling cutter head, 74-Support frame, 75-Pressure roller, 76-Meshing gear, 81-Modible frame, 82-One-way nut, 83-Threaded rod, 84-Rack one, 85-Rack two, 86-Rotating gear, 91-Eccentric shaft, 92-Reciprocating frame, 93-Connecting rod, 94-Mounting rod, 95-Limiting rod, 96-Cutting blade, 101-Support plate, 102-Brush plate, 103-Fixing rod, 104-Scraper, 105-Reset spring, 106-Short rod, 107-Collection box. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Example 1 A copper strip milling device, such as Figures 1-13 As shown, it includes a frame 1, a servo motor 2, a drive roller 3, a transmission roller 4, and a conveyor belt 5. The servo motor 2 is mounted on the frame 1, the drive roller 3 is rotatably connected to the frame 1, the output shaft of the servo motor 2 is connected to the drive roller 3, the transmission roller 4 is rotatably connected to the frame 1, and the conveyor belt 5 is connected between the drive roller 3 and the transmission roller 4.

[0031] The frame 1 has two discharge ports, which are symmetrically arranged. The copper strip billet 6 is placed on the conveyor belt 5, and the conveyor belt 5 can drive the copper strip billet 6 to move horizontally.

[0032] It also includes a milling mechanism, which is mounted on the frame 1. The milling mechanism includes a drive motor 71, a rotating shaft 72, a milling cutter head 73, a support frame 74, a pressure roller 75, and a meshing gear 76. The drive motor 71 is mounted on the frame 1, and the rotating shaft 72 is rotatably connected to the frame 1. The output shaft of the drive motor 71 is connected to the rotating shaft 72. The milling cutter head 73 is mounted on the rotating shaft 72. The support frame 74 is fixedly connected to the frame 1 and is located between the drive roller 3 and the transmission roller 4. 74 contacts the conveyor belt 5. Two pressure rollers 75 are rotatably connected to the frame 1. The two pressure rollers 75 are symmetrically arranged and are located above the copper strip blank 6. The pressure rollers 75 will contact the copper strip blank 6. The drive roller 3, the transmission roller 4 and the two pressure rollers 75 are all equipped with meshing gears 76. The meshing gear 76 on the drive roller 3 meshes with the meshing gear 76 on one pressure roller 75. The meshing gear 76 on the transmission roller 4 meshes with the meshing gear 76 on the other pressure roller 75.

[0033] The milling cutter head 73 is equipped with several milling cutters. The milling cutter head 73 is located above the conveyor belt 5. The milling cutters of the milling cutter head 73 will mill the copper strip blank 6. The support frame 74 is used to support the conveyor belt 5 and keep the conveyor belt 5 stable during milling.

[0034] It also includes a limiting mechanism, which is installed on the frame 1. The limiting mechanism includes a movable frame 81, a one-way nut 82, a threaded rod 83, a rack 1 84, a rack 2 85, and a rotating gear 86. Two movable frames 81 are slidably connected to the frame 1. The two movable frames 81 are arranged symmetrically. A one-way nut 82 is fixedly connected to one side of the frame 1. A threaded rod 83 is rotatably connected to the movable frame 81 near the one-way nut 82. The threaded rod 83 is threadedly connected to the one-way nut 82. A rack 1 84 is installed on the movable frame 81 near the one-way nut 82. A rack 2 85 is installed on the other movable frame 81. A rotating gear 86 is rotatably connected to the frame 1. The rotating gear 86 meshes with both rack 1 84 and rack 2 85.

[0035] The operator places the copper strip billet 6 on the conveyor belt 5 and starts the drive motor 71. The output shaft of the drive motor 71 rotates, causing the rotating shaft 72 and the milling cutter head 73 to rotate rapidly. The operator then starts the servo motor 2. The output shaft of the servo motor 2 rotates, causing the drive roller 3 to rotate. The drive roller 3 drives the transmission roller 4 to rotate via the conveyor belt 5. The drive roller 3 and the transmission roller 4 drive the pressure roller 75 to rotate via the meshing gear 76. The conveyor belt 5 and the pressure roller 75 together push the copper strip billet 6 horizontally. The copper strip billet 6 moves to the two... Between the two movable frames 81, the operator then rotates the threaded rod 83. The threaded rod 83, in conjunction with the one-way nut 82, pushes the movable frame 81 and rack 1 84 horizontally. Rack 1 84 drives the rotating gear 86 to rotate, which in turn drives rack 2 85 and another movable frame 81 to move closer to rack 1 84. The operator rotates the threaded rod 83 until the two movable frames 81 contact the copper strip blank 6, facilitating the processing of copper strip blanks 6 of different widths and improving the processing capabilities for copper strip blanks 6 of varying widths. The copper strip blank 6 is then moved to contact the high-speed rotating milling cutter head 73. The milling cutter of the high-speed rotating milling cutter head 73 mills the copper strip blank 6. The two movable frames 81 effectively clamp and limit the copper strip blank 6, offsetting the huge unidirectional milling force and preventing the copper strip blank 6 from moving or shaking during milling. This makes the copper strip blank 6 more stable during processing and improves the milling quality of the copper strip blank 6. Subsequently, the copper strip blank 6 moves to contact another pressure roller 75. The two pressure rollers 75 mill the copper strip blank 6... Pressing and transmission enable the copper strip billet 6 to move more stably. After the copper strip billet 6 is milled, it disengages from the rotating belt and pressure roller 75. The operator turns off the drive motor 71, and the output shaft of the drive motor 71 stops rotating. The rotating shaft 72 and the milling cutter head 73 also stop rotating. The operator turns off the servo motor 2, and the drive roller 3, transmission roller 4 and conveyor belt 5 also stop rotating. Finally, the operator reverses the threaded rod 83 to reset, and the two movable frames 81, rack one 84 and rack two 85 move in the same direction to reset.

[0036] Example 2 Based on Example 1, such as Figures 3-11As shown, it also includes a burr cutting mechanism, which is mounted on the frame 1. The cutting mechanism includes an eccentric shaft 91, a reciprocating frame 92, a connecting rod 93, a mounting rod 94, a limiting rod 95, and a cutting blade 96. The eccentric shaft 91 is mounted on the transmission roller 4. The reciprocating frame 92 is slidably connected to the frame 1. The connecting rod 93 is rotatably connected to the eccentric shaft 91. The connecting rod 93 is rotatably connected to the reciprocating frame 92. Two mounting rods 94 are slidably connected to the reciprocating frame 92. The two mounting rods 94 are symmetrically arranged. Limiting rods 95 are fixedly connected to both movable frames 81. The two limiting rods 95 are slidably connected to the two mounting rods 94 respectively. Cutting blades 96 are mounted on both mounting rods 94. The two cutting blades 96 are symmetrically arranged. The cutting blades 96 are used to cut the burrs and rough edges on both sides of the copper strip blank 6.

[0037] Two movable frames 81 drive two limit rods 95 to move closer to each other. The two limit rods 95 drive two mounting rods 94 and two cutting blades 96 to move closer to each other. The transmission roller 4 drives the eccentric shaft 91 to rotate. The eccentric shaft 91 drives the reciprocating frame 92 to move back and forth through the connecting rod 93. The reciprocating frame 92 drives the two mounting rods 94 and two cutting blades 96 to move back and forth. The copper strip blank 6 moves between and contacts the two cutting blades 96. The two reciprocating cutting blades 96 cut the burrs and rough edges on both sides of the copper strip blank 6, reducing the residual waste after milling and improving the milling surface quality of the copper strip blank 6. After the copper strip blank 6 is milled, the transmission roller 4 drives the eccentric shaft 91 to stop rotating. The reciprocating frame 92, the two mounting rods 94 and the two cutting blades 96 then stop moving back and forth. The two movable frames 81 drive the two limit rods 95 to move in the opposite direction and reset. The two mounting rods 94 and the two cutting blades 96 then move in the opposite direction and reset.

[0038] Example 3 Based on Example 2, such as Figures 4-13 As shown, it also includes a waste cleaning mechanism, which is installed on the frame 1. The waste cleaning mechanism includes a support plate 101, a brush plate 102, a fixed rod 103, a scraper 104, a return spring 105, a short rod 106, and a collection box 107. The support plate 101 is fixedly connected to the reciprocating frame 92, and the brush plate 102 is installed on the support plate 101. The brush plate 102 contacts the conveyor belt 5 and is used to clean copper shavings on the frame 1. A fixed rod 103 is fixedly connected, and a scraper 104 is slidably connected to the fixed rod 103. The bottom of the scraper 104 contacts the frame 1. The scraper 104 is used to scrape the copper chips milled inside the frame 1. A return spring 105 is connected between the scraper 104 and the frame 1. A short rod 106 is installed on the conveyor belt 5. Two collection boxes 107 are slidably connected to the frame 1. The two collection boxes 107 are located below the two discharge ports of the frame 1. The collection boxes 107 are used to collect the copper chips milled.

[0039] The reciprocating frame 92 drives the support plate 101 and the brush plate 102 to move back and forth. The brush plate 102 cleans the copper shavings on the surface of the conveyor belt 5, reducing the amount of copper shavings adhering to the surface of the conveyor belt 5 and preventing the copper shavings adhering to the surface of the conveyor belt 5 from scratching the copper strip blank 6. The conveyor belt 5 drives the short rod 106 to move until it contacts the scraper 104. The short rod 106 drives the scraper 104 to move horizontally along the fixed rod 103, and the return spring 105 is compressed. The scraper 104 scrapes the copper shavings in the frame 1. The short rod 106 pushes the scraper 104 to move to another discharge port of the frame 1. Copper shavings are scraped into the collection box 107. The conveyor belt 5 drives the short rod 106 to move upward. The short rod 106 disengages from the scraper 104. The return spring 105 pushes the scraper 104 to move in the opposite direction to the reset position. The scraper 104 scrapes the copper shavings in the frame 1 to another collection box 107. The conveyor belt 5 drives the short rod 106 to move to the reset position. This process is repeated to facilitate the cleaning and collection of the milled copper shavings, improving the copper shavings recovery rate and efficiency. Finally, the reciprocating frame 92 drives the support plate 101 and the brush plate 102 to stop reciprocating, and the conveyor belt 5 drives the short rod 106 to stop moving.

[0040] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be defined not only by the appended claims, but also by their equivalents.

Claims

1. A milling device for copper strip blanks, characterized in that it includes: It has a frame (1), a servo motor (2), a drive roller (3), a transmission roller (4) and a conveyor belt (5). The servo motor (2) is installed on the frame (1). The drive roller (3) is rotatably connected to the frame (1). The output shaft of the servo motor (2) is connected to the drive roller (3). The transmission roller (4) is rotatably connected to the frame (1). The conveyor belt (5) is connected between the drive roller (3) and the transmission roller (4).

2. The copper strip milling device according to claim 1, characterized in that, The frame (1) is provided with two discharge ports, which are symmetrically arranged. The copper strip blank (6) is placed on the conveyor belt (5), and the conveyor belt (5) can drive the copper strip blank (6) to move horizontally.

3. The copper strip milling device according to claim 2, characterized in that, It also includes a milling mechanism, which is mounted on the frame (1). The milling mechanism includes a drive motor (71), a rotating shaft (72), a milling cutter head (73), a support frame (74), a pressure roller (75), and a meshing gear (76). The drive motor (71) is mounted on the frame (1), and the rotating shaft (72) is rotatably connected to the frame (1). The output shaft of the drive motor (71) is connected to the rotating shaft (72). The milling cutter head (73) is mounted on the rotating shaft (72). The support frame (74) is fixedly connected to the frame (1). The support frame (74) is located between the drive roller (3) and the transmission roller (4). 74) Contact with the conveyor belt (5), two pressure rollers (75) are rotatably connected on the frame (1). The two pressure rollers (75) are symmetrically arranged. Both pressure rollers (75) are located above the copper strip blank (6), and the pressure rollers (75) will contact the copper strip blank (6). The drive roller (3), the transmission roller (4) and the two pressure rollers (75) are all equipped with meshing gears (76). The meshing gear (76) on the drive roller (3) meshes with the meshing gear (76) on one pressure roller (75), and the meshing gear (76) on the transmission roller (4) meshes with the meshing gear (76) on the other pressure roller (75).

4. A copper strip milling device according to claim 3, characterized in that, The milling cutter head (73) is equipped with several milling cutters. The milling cutter head (73) is located above the conveyor belt (5). The milling cutters of the milling cutter head (73) will mill the copper strip blank (6). The support frame (74) is used to support the conveyor belt (5) and keep the conveyor belt (5) stable during milling.

5. A copper strip milling device according to claim 4, characterized in that, It also includes a limiting mechanism, which is installed on the frame (1). The limiting mechanism includes a movable frame (81), a one-way nut (82), a threaded rod (83), a rack one (84), a rack two (85), and a rotating gear (86). Two movable frames (81) are slidably connected on the frame (1). The two movable frames (81) are symmetrically arranged. A one-way nut (82) is fixedly connected to one side of the frame (1). A threaded rod (83) is rotatably connected to the movable frame (81) on the side near the one-way nut (82). The threaded rod (83) is connected to the one-way nut (82) by a thread. A rack one (84) is installed on the movable frame (81) on the side near the one-way nut (82). A rack two (85) is installed on the other movable frame (81). A rotating gear (86) is rotatably connected to the frame (1). The rotating gear (86) meshes with rack one (84) and rack two (85).

6. A copper strip milling device according to claim 5, characterized in that, It also includes a burr cutting mechanism, which is installed on the frame (1). The cutting mechanism includes an eccentric shaft (91), a reciprocating frame (92), a connecting rod (93), a mounting rod (94), a limit rod (95), and a cutting blade (96). An eccentric shaft (91) is installed on the transmission roller (4). A reciprocating frame (92) is slidably connected to the frame (1). A connecting rod (93) is rotatably connected to the eccentric shaft (91). The connecting rod (93) is rotatably connected to the reciprocating frame (92). Two mounting rods (94) are slidably connected to the reciprocating frame (92). The two mounting rods (94) are symmetrically arranged. Limit rods (95) are fixedly connected to both movable frames (81). The two limit rods (95) are slidably connected to the two mounting rods (94). Cutting blades (96) are installed on both mounting rods (94). The two cutting blades (96) are symmetrically arranged.

7. A copper strip milling device according to claim 6, characterized in that, It also includes a waste cleaning mechanism, which is installed on the frame (1). The waste cleaning mechanism includes a support plate (101), a brush plate (102), a fixing rod (103), a scraper (104), a return spring (105), a short rod (106), and a collection box (107). The support plate (101) is fixedly connected to the reciprocating frame (92). The brush plate (102) is installed on the support plate (101). The brush plate (102) is connected to the conveyor belt (5). A fixed rod (103) is fixedly connected to the frame (1), and a scraper (104) is slidably connected to the fixed rod (103). The bottom of the scraper (104) contacts the frame (1), and a return spring (105) is connected between the scraper (104) and the frame (1). A short rod (106) is installed on the conveyor belt (5). Two collection boxes (107) are slidably connected to the frame (1), and the two collection boxes (107) are located below the two discharge ports of the frame (1).