Low noise feeding equipment

Abstract

The application discloses a low-noise feeding equipment, which comprises a feeding mechanism and a discharging mechanism, characterized in that a differential speed material selecting mechanism is arranged between the feeding mechanism and the discharging mechanism, the differential speed material selecting mechanism comprises a support, a feeding port, a discharging port and a material selecting cavity are arranged on the support, a horizontal cylinder and a vertical cylinder are arranged in the material selecting cavity, the horizontal cylinder is driven by a horizontal motor to drive the vertical cylinder to rotate synchronously, the vertical cylinder is driven by a vertical motor, a feeding cylinder for pushing the workpiece to move is arranged on the outside of the feeding port of the support, a sliding table is slidably arranged on the outside of the discharging port of the support, a selecting direction cylinder which moves along with the sliding table is rotatably arranged on the sliding table, and the selecting direction cylinder and the horizontal cylinder are oppositely arranged. The low-noise feeding equipment can arrange the workpiece in a whole column direction according to the processing requirement, improves the material selecting success rate, reduces the noise generated by the workpiece feeding, and avoids the abrasion of the workpiece.

Description

Technical Field

[0001] This invention relates to the field of feeding equipment, and more particularly to a low-noise feeding device. Background Technology

[0002] Before CNC machining of hardware workpieces, automated loading of the workpieces is required, for example... Figure 1 The workpiece shown is a tapered piece. The left end of the workpiece 10 is the large end 101 with a diameter of 35.1 mm, and the right end is the small end 102 with a diameter of 7.6 mm. The whole piece is conical in shape. When it rolls, the left and right sides form a differential speed. When the workpiece rolls, it is given a circular arc constraint. The differential speed of the workpiece is converted into forward thrust when it rolls.

[0003] Using a traditional vibratory feeder to feed the workpiece results in several issues. The simultaneous placement of multiple workpieces within the feeder leads to collisions and generates high-frequency, highly penetrating noise. Noise tests conducted in a 20-30 square meter space showed noise levels reaching approximately 90 decibels. Furthermore, the workpieces are difficult to align during the feeding process. Because the vibratory feeder continuously selects each workpiece, it may require multiple selections, resulting in a very low success rate. The estimated success rate is less than 20%, and the continuous selection process also causes wear and tear on the workpieces. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a low-noise feeding device that can align workpieces in the order of processing requirements, improve the success rate of material selection, and at the same time reduce the noise generated by workpiece feeding and avoid workpiece wear.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a low-noise feeding device, including a frame, on which a feeding mechanism and a discharging mechanism are provided, characterized in that: a differential speed material selection mechanism is provided between the feeding mechanism and the discharging mechanism, the differential speed material selection mechanism includes a support, on which an inlet communicating with the feeding mechanism and an outlet communicating with the discharging mechanism are provided, a material selection cavity is formed on the support between the inlet and the outlet, a material selection component is provided in the material selection cavity that can drive the workpiece to rotate differentially and roll forward, and a direction selection component is provided at the outlet that can drive the workpiece to rotate at an isoaxial angle.

[0006] As an improvement, the material selection component includes a transverse cylinder and a vertical cylinder disposed within the material selection chamber. The two ends of the transverse cylinder are connected to the inlet and outlet. A vertical hole is opened on the transverse cylinder, and the vertical cylinder is installed in the vertical hole. A transverse hole communicating with the transverse cylinder is opened on the opposite side wall of the vertical cylinder. The transverse cylinder is driven by a transverse motor, which drives the vertical cylinder to rotate synchronously. The vertical cylinder is driven by a vertical motor. A feeding cylinder for pushing the workpiece is disposed on the support outside the inlet. The direction selection component includes a slide table disposed on the support outside the outlet and slidably disposed thereon. A direction selection cylinder is rotatably disposed on the slide table and moves with the slide table. The direction selection cylinder and the transverse cylinder are arranged opposite to each other. The central axis of the direction selection cylinder is inclined to the central axis of the workpiece. A double-stroke cylinder, a direction selection motor, and a pusher cylinder are disposed on the support. The output end of the direction selection motor is connected to the direction selection cylinder through a transmission. The double-stroke cylinder is connected to the slide table. The pusher cylinder and the discharge mechanism are arranged opposite to each other.

[0007] Further improvements include the bracket being equipped with a front-opening cylinder at the feed inlet and a rear-opening cylinder at the discharge outlet. The output end of the front-opening cylinder is equipped with a front baffle plate that extends into the feed inlet, and the output end of the rear-opening cylinder is equipped with a rear baffle plate for blocking the outlet of the transverse cylinder.

[0008] Further improvements include an inclined discharge port with a limiting groove formed on the track of the discharge port for guiding and limiting the workpiece.

[0009] In a further improvement, the two ends of the transverse cylinder are provided with bearings supported on the bracket, and the transverse motor drives the transverse cylinder to rotate through a belt drive structure.

[0010] In a further improvement, a mounting plate is provided on the outer wall of the vertical hole of the transverse cylinder, and the vertical cylinder is connected to the mounting plate through a bearing. A transmission rod extends from both ends of the vertical cylinder, and a groove is opened on the end face of the transmission rod. A drive rod is provided at the output end of the vertical motor, and an insert is formed on the drive rod to match the groove.

[0011] In a further improvement, the output end of the directional motor is provided with a transmission bar, and a cutting platform is formed on the side wall of the transmission bar, which is adapted to the outer side wall of the transmission bar in the inner cavity of the directional cylinder.

[0012] Further improvements include a feeding mechanism comprising a feeding frame fixed to the machine frame, a linear guide post erected on the feeding frame, a sliding frame slidably mounted on the linear guide post, and a sliding cylinder mounted on the feeding frame to drive the sliding frame to slide. The sliding frame includes an upper sliding plate, a middle sliding plate, and a lower sliding plate. An upper inclined push plate is mounted on the upper sliding plate, a middle inclined push plate is mounted on the middle sliding plate, and a lower inclined push plate is mounted on the lower sliding plate. A partition plate fixedly connected to the machine frame is mounted between the upper, middle, and lower inclined push plates. A hopper is mounted on the machine frame, and a slanted push block for transferring workpieces from the hopper to the lower inclined push plate is mounted at the bottom of the hopper. The slanted push block is connected to the slanted push cylinder.

[0013] Further improvements include the tops of the upper inclined push plate, the middle inclined push plate, the lower inclined push plate, and the partition plate being inclined.

[0014] In a further improvement, the discharge mechanism includes a base, on which an inclined slide is provided at the connection between the support and the discharge port. On the base, below the inclined slide, a left-hand trapezoidal screw, a right-hand trapezoidal screw, and a rotating optical shaft are rotatably arranged in parallel. A drive motor is provided on the base, and the output end of the drive motor is provided with a gear structure to drive the left-hand trapezoidal screw, the right-hand trapezoidal screw, and the rotating optical shaft to rotate.

[0015] In a further improvement, the gear structure includes a transmission pulley connected to a right-hand trapezoidal lead screw, a drive pulley connected to a transmission motor, and a belt connecting the transmission pulley and the drive pulley. A drive gear is provided on the right-hand trapezoidal lead screw, and transmission gears that mesh with the drive gear are respectively provided on the left-hand trapezoidal lead screw and the rotating optical shaft.

[0016] Compared with the prior art, the advantages of this invention are as follows: The workpiece is placed into the hopper, and the feeding mechanism transports the workpiece to the inlet. The feeding cylinder pushes the workpiece into the horizontal cylinder. The horizontal motor drives the horizontal cylinder to rotate clockwise, and the horizontal cylinder drives the vertical cylinder to rotate synchronously. The workpiece rotates clockwise along the inner walls of the horizontal and vertical cylinders. During rotation, due to the difference in size and weight between the left and right ends of the workpiece, a differential speed is formed during rotation. This differential speed is converted into forward thrust, causing the larger end of the workpiece to face left and move towards the smaller end. The retracting workpiece stops inside the vertical cylinder, separating the larger and smaller ends. Afterward, the vertical motor drives the vertical cylinder to rotate 180 degrees clockwise, and the vertical cylinder drives... The workpiece rotates 180 degrees synchronously, so that the small end of the workpiece faces left. Then, the feeding cylinder pushes the workpiece into the directional cylinder. Under the action of the double-stroke cylinder, the directional cylinder moves back about 15mm with the slide table. Then, the directional motor drives the directional cylinder to rotate. Since the central axis of the directional cylinder and the central axis of the workpiece are inclined to each other, the workpiece achieves equiaxial tilting rotation, which can select the assembly position of the workpiece. After screening, the directional cylinder moves back, and the pusher cylinder sends the workpiece out to the discharge port. The discharge mechanism drives the workpiece to be arranged in a row for discharge. Since only a single workpiece is running in sequence during the entire selection process, the noise generated is only the noise of a single workpiece moving, which greatly solves the problems of noise, stability and versatility of workpiece row feeding. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the workpiece to be processed in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the external structure of the low-noise feeding device in an embodiment of the present invention;

[0019] Figure 3 yes Figure 2 A structural diagram from another direction;

[0020] Figure 4 This is a schematic diagram of the internal main structure of the low-noise feeding device in an embodiment of the present invention;

[0021] Figure 5 yes Figure 4 A structural diagram from another direction;

[0022] Figure 6 This is a schematic diagram of the feeding mechanism in an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the differential material selection mechanism in an embodiment of the present invention;

[0024] Figure 8 This is a cross-sectional view of the differential speed material selection mechanism in an embodiment of the present invention;

[0025] Figure 9 This is an exploded structural diagram of the differential material selection mechanism in an embodiment of the present invention;

[0026] Figure 10 This is a schematic diagram of the material discharge mechanism in an embodiment of the present invention;

[0027] Figure 11 This is an exploded structural diagram of the discharge mechanism in an embodiment of the present invention. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] like Figures 1 to 11 As shown, the low-noise feeding equipment in this embodiment includes a frame 4, a feeding mechanism 1, a discharging mechanism 2, and a differential speed material selection mechanism 3.

[0030] Among them, such as Figure 1 As shown, the workpiece 10 involved in this invention has the following structure: the left end of the workpiece 10 is a large end 101 with a diameter of 35.1 mm, and the right end is a small end 102 with a diameter of 7.6 mm, forming an overall conical shape. The material selection principle utilized is that when the workpiece 10 rolls, the large end 101 and the small end 102 will form a differential speed. By providing arc constraint when the workpiece 10 rolls, the differential speed of the workpiece 10 is converted into forward thrust.

[0031] Please continue reading. Figures 2 to 5 as well as Figures 7 to 9As shown, a feeding mechanism 1 and a discharging mechanism 2 are provided on the frame 4. A differential speed material selection mechanism 3 is provided between the feeding mechanism 1 and the discharging mechanism 2. The differential speed material selection mechanism 3 includes a support 31. The support 31 is provided with an inlet 301 communicating with the feeding mechanism 1 and an outlet 302 communicating with the discharging mechanism 2. A material selection chamber 311 is formed on the support 31 between the inlet 301 and the outlet 302. A transverse cylinder 32 and a vertical cylinder 33 are provided in the material selection chamber 311. The two ends of the transverse cylinder 32 are connected to the inlet 301 and the outlet 302. A vertical hole 321 is opened on the transverse cylinder 32. The vertical cylinder 33 is installed in the vertical hole 321. A transverse hole 331 communicating with the transverse cylinder 32 is opened on the opposite side wall of the vertical cylinder 33. The transverse cylinder 32 is powered by a transverse motor. Driven by 320, the horizontal cylinder 32 drives the vertical cylinder 33 to rotate synchronously. The vertical cylinder 33 is driven by the vertical motor 330. A feeding cylinder 34 is set on the support 31 outside the feed port 301 to push the workpiece 10 to move. A slide table 371 is slidably set on the support 31 outside the discharge port 302. A directional cylinder 372 is rotatably set on the slide table 371 and moves with the slide table 371. The directional cylinder 372 and the horizontal cylinder 32 are arranged opposite to each other. The central axis of the directional cylinder 372 is inclined to the central axis of the workpiece 10. A double-stroke cylinder 37, a directional motor 36 and a pusher cylinder 39 are set on the support 31. The output end of the directional motor 36 is connected to the directional cylinder 372. The double-stroke cylinder 37 is connected to the slide table 371. The pusher cylinder 39 and the discharge mechanism 2 are arranged opposite to each other.

[0032] At the same time, such as Figure 7 As shown, in order to facilitate the workpiece 10 to slide into the discharge port 302 and enter the discharge mechanism 2, the discharge port 302 has an inclination, and a limiting groove for guiding and limiting the workpiece 10 is formed on the track of the discharge port 302.

[0033] Furthermore, to limit the individual selection action of workpiece 10, the support 31 is equipped with a front-opening cylinder 35 located at the feed inlet 301 and a rear-opening cylinder 38 located at the discharge outlet 302. The output end of the front-opening cylinder 35 is equipped with a front baffle plate 351 extending into the feed inlet 301, and the output end of the rear-opening cylinder 38 is equipped with a rear baffle plate 381 for blocking the outlet of the transverse cylinder 32. In this way, during the process of workpiece 10 entering the selection chamber 311, the opening and closing of the front-opening cylinder 35 and the rear-opening cylinder 38 ensure that only one workpiece 10 participates in the selection action at a time in the selection chamber 311.

[0034] Furthermore, in embodiments of the present invention, such as Figure 8 and 9As shown, the transmission method of the horizontal cylinder 32 and the vertical cylinder 33 is as follows: the two ends of the horizontal cylinder 32 are provided with bearings supported on the bracket 31, and the horizontal motor 320 drives the horizontal cylinder 32 to rotate through the belt transmission structure 322.

[0035] Meanwhile, a mounting plate 334 is provided on the outer wall of the vertical hole 321 of the transverse cylinder 32. The vertical cylinder 33 is connected to the mounting plate 334 through bearings. Transmission rods 335 extend from both ends of the vertical cylinder 33. A groove 336 is formed on the end face of the transmission rod 335. A drive rod 332 is provided at the output end of the vertical motor 330. An insert 333 adapted to the groove 336 is formed on the drive rod 332. In this way, the vertical cylinder 33 is driven to rotate synchronously during the rotation of the transverse cylinder 32. When the vertical cylinder 33 needs to rotate, the vertical motor 330 drives the vertical cylinder 33 to rotate by inserting the insert 333 into the groove 336 of the vertical cylinder 33.

[0036] Furthermore, such as Figure 7 and 9 As shown, in order to enable the directional cylinder 372 to slide with the slide table 371, and at the same time, the directional motor 36 can drive the directional cylinder 372 to rotate, a transmission bar 361 is provided at the output end of the directional motor 36. A cutting platform 362 is formed on the side wall of the transmission bar 361, which is adapted to the outer side wall of the transmission bar 361 in the inner cavity of the directional cylinder 372.

[0037] Furthermore, in embodiments of the present invention, such as Figure 2 and 6 As shown, the feeding mechanism 1 includes a feeding frame 11 fixed to the frame 4, a linear guide post 14 erected on the feeding frame 11, a sliding frame 12 slidably disposed on the linear guide post 14, and a sliding cylinder 15 disposed on the feeding frame 11 to drive the sliding frame 12 to slide. The sliding frame 12 includes an upper sliding plate 121, a middle sliding plate 122, and a lower sliding plate 123. An upper inclined push plate 131 is disposed on the upper sliding plate 121, and a middle sliding plate 122 is disposed on the middle sliding plate 123. An inclined push plate 132 is provided on the lower sliding plate 123, and a lower inclined push plate 133 is provided on the lower sliding plate 123. A partition plate 16 is fixedly connected to the frame 4 between the upper inclined push plate 131, the middle inclined push plate 132 and the lower inclined push plate 133. A hopper 41 is provided on the frame 4. The bottom of the hopper 41 is provided with an inclined push block 17 for transferring the workpiece 10 from the hopper 41 to the lower inclined push plate 133. The inclined push block 17 is connected to the inclined push cylinder 171.

[0038] Furthermore, to ensure that the workpiece 10 can slide easily during the transfer and lifting process, and to prevent the workpiece 10 from falling, an incline is formed on the top of the upper inclined push plate 131, the middle inclined push plate 132, the lower inclined push plate 133, and the partition plate 16. Preferably, the incline is 65 degrees.

[0039] Workpiece 10 is placed in hopper 41 of frame 4. Inclined push cylinder 171 drives inclined push block 17 to move up and down. Workpiece 10 in hopper 41 is pushed one by one onto lower inclined push plate 133. Sliding cylinder 15 drives sliding frame 12 to slide up and down along linear guide post 14. During each upward sliding of sliding frame 12, workpiece 10 on lower inclined push plate 133 is transported to middle inclined push plate 132. Workpiece 10 on middle inclined push plate 132 is transported to upper inclined push plate 131. Workpiece on upper inclined push plate 131 is finally fed into feed port 301, realizing the feeding of workpiece 10.

[0040] Furthermore, in embodiments of the present invention, such as Figure 10 and 11 As shown, the discharge mechanism 2 includes a base 21. An inclined slide 22 is provided on the base 21 at the connection between the support 31 and the discharge port 302. A left-hand trapezoidal screw 26, a right-hand trapezoidal screw 25 and a rotating optical shaft 27 are rotatably arranged on the base 21 below the inclined slide 22. A drive motor 24 is provided on the base 21. The output end of the drive motor 24 is provided with a gear structure 23 that drives the left-hand trapezoidal screw 26, the right-hand trapezoidal screw 25 and the rotating optical shaft 27 to rotate.

[0041] Furthermore, the gear structure 23 includes a transmission pulley connected to the right-hand trapezoidal lead screw 25, a drive pulley 231 connected to the transmission motor 24, and a belt 232 connecting the transmission pulley and the drive pulley 231. A drive gear 233 is provided on the right-hand trapezoidal lead screw 25, and transmission gears 234 that mesh with the drive gear 233 are respectively provided on the left-hand trapezoidal lead screw 26 and the rotating optical shaft 27.

[0042] When the workpiece 10 enters the inclined slide 22 of the discharge mechanism 2 from the discharge port 302 and slides along the inclined slide 22, the drive motor 24 drives the left-hand trapezoidal screw 26, the right-hand trapezoidal screw 25 and the rotating optical shaft 27 to rotate simultaneously through the gear structure 23. The left-hand trapezoidal screw 26, the right-hand trapezoidal screw 25 and the rotating optical shaft 27 form a thrust to convey the workpiece 10 forward, pushing the workpiece 10 to move forward in a stable linear discharge motion.

[0043] In summary, this invention places the workpiece 10 into the hopper 41, and the feeding mechanism 1 transports the workpiece to the inlet 301. The feeding cylinder 34 pushes the workpiece 10 into the transverse cylinder 32. The transverse motor 320 drives the transverse cylinder 32 to rotate clockwise, and the transverse cylinder 32 drives the vertical cylinder 33 to rotate synchronously. The workpiece 10 rotates clockwise along the inner walls of the transverse cylinder 32 and the vertical cylinder 33. During the rotation, due to the difference in size and weight between the left and right ends of the workpiece 10, the workpiece 10 forms a differential speed during rotation. When rolling, the differential speed is converted into forward thrust, causing the larger end of the workpiece 10 to face left and move towards the smaller end. The retracting workpiece 10 stops inside the vertical cylinder 33, separating the larger and smaller ends. Then, the vertical motor 330 drives the vertical cylinder 33 to rotate 180 degrees clockwise, and the vertical cylinder 33 drives the workpiece 10 to rotate 180 degrees synchronously, so that the smaller end of the workpiece 10 faces left. Then, the workpiece 10 continues to rotate. The material cylinder 34 then pushes the workpiece 10 into the selection cylinder 372. Under the action of the double-stroke cylinder 37, the selection cylinder 372 moves back about 15mm following the slide table 371. Then, the selection motor 36 drives the selection cylinder 372 to rotate. Since the central axis of the selection cylinder 372 is inclined to the central axis of the workpiece 10, the workpiece 10 achieves equiaxial tilting rotation, thus selecting the assembly position of the workpiece 10. After screening, the selection cylinder 372 moves back, and the pusher cylinder 39 sends the workpiece 10 out to the discharge port 302. The discharge mechanism 2 drives the workpiece 10 to be arranged in a row for discharge. Since only a single workpiece 10 is running in sequence during the entire selection process, the noise generated is only the noise of the movement of a single workpiece 10. In a noise test conducted in a space of 20 to 30 square meters, the noise can be kept below about 40 decibels. At the same time, the success rate of selection can reach 100%, and the mutual wear between workpieces is also avoided.

Claims

1. A low-noise feeding device, comprising a frame (4), wherein a feeding mechanism (1) and a discharging mechanism (2) are provided on the frame (4), characterized in that: A differential material selection mechanism (3) is provided between the feeding mechanism (1) and the discharging mechanism (2). The differential material selection mechanism (3) includes a support (31). The support (31) is provided with an inlet (301) communicating with the feeding mechanism (1) and an outlet (302) communicating with the discharging mechanism (2). A material selection cavity (311) is formed on the support (31) between the inlet (301) and the outlet (302). A material selection component is provided in the material selection cavity (311) that can drive the workpiece (10) to rotate differentially and roll forward. A direction selection component is provided at the outlet (302). The material selection assembly includes a horizontal cylinder (32) and a vertical cylinder (33) disposed within the material selection chamber. The two ends of the horizontal cylinder (32) are connected to an inlet (301) and an outlet (302). A vertical hole (321) is provided on the horizontal cylinder (32), and the vertical cylinder (33) is installed within the vertical hole (321). A horizontal hole (331) communicating with the horizontal cylinder (32) is provided on the opposite sidewall of the vertical cylinder (33). The horizontal cylinder (32) is driven by a horizontal motor (320), which in turn drives the vertical cylinder (33) to rotate synchronously. The vertical cylinder (33) is driven by a vertical motor (330). A mechanism for moving the workpiece (10) is provided on the support (31) outside the inlet (301). Feeding cylinder (34); The orientation component includes a slide (371) mounted on the support (31) outside the discharge port (302) and slidably mounted thereon. An orientation cylinder (372) is rotatably mounted on the slide (371) and moves with the slide (371). The orientation cylinder (372) and the transverse cylinder (32) are arranged opposite to each other. The central axis of the orientation cylinder (372) is inclined to the central axis of the workpiece (10). A double-stroke cylinder (37), an orientation motor (36) and a pusher cylinder (39) are mounted on the support (31). The output end of the orientation motor (36) is connected to the orientation cylinder (372) in a transmission connection. The double-stroke cylinder (37) is connected to the slide (371). The pusher cylinder (39) and the discharge mechanism (2) are arranged opposite to each other.

2. The low-noise feeding device according to claim 1, characterized in that: The bracket (31) is provided with a front opening cylinder (35) located at the feed inlet (301) and a rear opening cylinder (38) located at the discharge outlet (302). The output end of the front opening cylinder (35) is provided with a front baffle plate (351) extending into the feed inlet (301), and the output end of the rear opening cylinder (38) is provided with a rear baffle plate (381) for blocking the outlet of the transverse cylinder (32).

3. The low-noise feeding device according to claim 1, characterized in that: The discharge port (302) has an incline, and a limiting groove for guiding and limiting the workpiece (10) is formed on the track of the discharge port (302).

4. The low-noise feeding device according to claim 1, characterized in that: The transverse cylinder (32) is provided with bearings at both ends supported on the bracket (31), and the transverse motor (320) drives the transverse cylinder (32) to rotate through the belt drive structure (322).

5. The low-noise feeding device according to claim 1, characterized in that: A mounting plate (334) is provided on the outer wall of the vertical hole (321) of the transverse cylinder (32). The vertical cylinder (33) is connected to the mounting plate (334) by bearings. A transmission rod (335) extends from both ends of the vertical cylinder (33). A groove (336) is provided on the end face of the transmission rod (335). A drive rod (332) is provided at the output end of the vertical motor (330). An insert (333) is formed on the drive rod (332) to match the groove (336).

6. The low-noise feeding device according to claim 1, characterized in that: The output end of the directional motor (36) is provided with a transmission bar (361), and a cutting platform (362) is formed on the side wall of the transmission bar (361), which is adapted to the outer side wall of the transmission bar (361) in the inner cavity of the directional cylinder (372).

7. The low-noise feeding device according to claim 1, characterized in that: The feeding mechanism (1) includes a feeding frame (11) fixed on the frame (4), a linear guide post (14) erected on the feeding frame (11), a sliding frame (12) slidably disposed on the linear guide post (14), and a sliding cylinder (15) disposed on the feeding frame (11) to drive the sliding frame (12) to slide. The sliding frame (12) includes an upper sliding plate (121), a middle sliding plate (122), and a lower sliding plate (123). An upper inclined push plate (131) is disposed on the upper sliding plate (121), and a middle inclined push plate (131) is disposed on the middle sliding plate (122). An inclined push plate (132) is provided on the lower sliding plate (123). A partition plate (16) fixedly connected to the frame (4) is provided between the upper inclined push plate (131), the middle inclined push plate (132) and the lower inclined push plate (133). A hopper (41) is provided on the frame (4). A slanted push block (17) for transferring the workpiece (10) from the hopper (41) to the lower inclined push plate (133) is provided at the bottom of the hopper (41). The slanted push block (17) is connected to the slanted push cylinder (171).

8. The low-noise feeding device according to claim 7, characterized in that: The tops of the upper inclined push plate (131), the middle inclined push plate (132), the lower inclined push plate (133), and the partition plate (16) are inclined.

9. The low-noise feeding device according to claim 1, characterized in that: The discharge mechanism (2) includes a base (21), and a sloped slide (22) is provided on the base (21) at the connection between the discharge port (302) of the bracket (31). A left-handed trapezoidal screw (26), a right-handed trapezoidal screw (25) and a rotating optical shaft (27) are rotatably arranged on the base (21) below the sloped slide (22). A drive motor (24) is provided on the base (21), and a gear structure (23) is provided at the output end of the drive motor (24) to drive the left-handed trapezoidal screw (26), the right-handed trapezoidal screw (25) and the rotating optical shaft (27) to rotate.

10. The low-noise feeding device according to claim 9, characterized in that: The gear structure (23) includes a transmission pulley connected to a right-hand trapezoidal lead screw (25), a drive pulley (231) connected to a transmission motor (24), and a belt (232) connecting the transmission pulley and the drive pulley (231). A drive gear (233) is provided on the right-hand trapezoidal lead screw (25), and transmission gears (234) that mesh with the drive gear (233) are respectively provided on the left-hand trapezoidal lead screw (26) and the rotating optical shaft (27).

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