A rotary feeding mechanism for programmable controller system application practical training examination

Abstract

This invention belongs to the field of rotary feeding technology, specifically a rotary feeding mechanism for practical training and assessment of programmable logic controller (PLC) systems. It includes a base, a turntable, a landing gear, a lifting seat, a clamping mechanism, and a lifting drive mechanism. The turntable is fixedly connected to the top of the base, the landing gear is fixedly connected to the top of the turntable, the lifting seat is slidably connected to the frame of the landing gear, and the clamping mechanism is installed on one side of the lifting seat. In this invention, the rotating design of the turntable and U-shaped guide rail enables continuous feeding at multiple stations, significantly improving the feeding efficiency in training and assessment equipment. The cooperation between the electromagnetic lock and the limit block ensures positioning accuracy and prevents the slider from shifting during movement. The synergistic effect of the elastic band and pressure switch provides automatic reset and buffering functions, reducing the need for manual adjustment, making it particularly suitable for high-frequency operation scenarios. Simultaneously, the buffering protection extends the service life of the pressure switch.

Description

Technical Field

[0001] This invention relates to the field of rotary feeding technology, and in particular to a rotary feeding mechanism for practical training and assessment of programmable controller systems. Background Technology

[0002] In the field of mechatronics teaching and skills assessment, programmable logic controller (PLC) system application training platforms are key equipment for cultivating industrial automation talents. These platforms typically integrate multiple functional units such as feeding, processing, assembly, sorting, and conveying to simulate a complete production process. The design of the feeding mechanism in existing training platforms directly impacts the efficiency and effectiveness of teaching and assessment.

[0003] A search revealed Chinese patent application CN212981445U, which discloses a multi-station rotary feeding device, including a base frame. A rotating component and a feeding component are respectively arranged on the base frame. A material-carrying component is arranged on the rotating component. The feeding component is located on the side of the rotating component and below the material-carrying component. It has the characteristics of fast start-up and shutdown and low cost.

[0004] However, the aforementioned rotary feeding mechanism still has significant shortcomings when facing the high-frequency, high-precision, and multi-station collaborative requirements of PLC system application training and assessment: First, its station positioning mostly relies on mechanical stops or simple sensors, which are prone to wear and tear over long-term use, leading to a decrease in positioning accuracy and affecting the accuracy of the clamping mechanism in picking up materials; second, the fixing method of the material-carrying fixture is often relatively simple, lacking a rapid locking and buffering mechanism. There is an urgent need to design a rotary feeding mechanism for programmable controller system application training and assessment to solve these problems. Summary of the Invention

[0005] Addressing the issues of insufficient station positioning accuracy and unfavorable conditions for frequent material changes in existing rotary feeding mechanisms, this invention proposes a rotary feeding mechanism for practical training and assessment of programmable controller systems.

[0006] The present invention proposes a rotary feeding mechanism for practical training and assessment of programmable controller system applications, comprising a base, a turntable, a landing gear, a lifting seat, a clamping mechanism, and a lifting drive mechanism. The turntable is fixedly connected to the top of the base, the landing gear is fixedly connected to the top of the turntable, the lifting seat is slidably connected to the frame of the landing gear, the clamping mechanism is installed on one side of the lifting seat, and the lifting seat is throttle connected to the lifting drive mechanism. The top of the turntable is rotatably connected to a turntable, and the top of the base is equipped with a rotary drive mechanism, with the turntable being driven by the output end of the rotary drive mechanism. The top of the turntable is fixedly connected to multiple U-shaped guide rails, which are evenly and equiangularly distributed about the rotation center axis of the turntable. The U-shaped guide rail has a sliding block inside, and a material carrier fixture is fixedly connected to the top of the slider. The U-shaped guide rail consists of two parallel and symmetrically arranged straight rail sections and an arc section connecting the straight rail sections. A limit block is fixedly connected to the side of the slider near the arc section. An electromagnetic lock is installed on the top of the U-shaped guide rail. The limit block has a locking hole adapted to the electromagnetic lock. Two partitions are symmetrically fixed to the inner wall of the arc section, and the same elastic band is fixedly connected between the two partitions. A bracket is fixedly connected to one side of the limiting block, and a pressure switch is fixedly connected to the side of the bracket near the arc section. The pressure switch is matched with one of the partitions. A reset button is provided on the top of the electromagnetic lock.

[0007] Preferably, the clamping mechanism includes an electric slide rail, a cylinder, a sliding sleeve, two curved arms, and two clamps. The electric slide rail is fixedly connected to one side of the lifting seat, the sliding sleeve is slidably connected to the electric slide rail, the two curved arms are symmetrically installed on both sides of the sliding sleeve, the two cylinders are respectively fixedly connected to the ends of the two curved arms, and the two clamps are respectively fixedly connected to the extension and retraction parts of the two cylinders, and the two clamps are symmetrically matched.

[0008] Preferably, the inner walls of both clamps are fixedly connected with rubber pads, and the ends of the two cylinders that are far apart are provided with air pipe connectors.

[0009] Preferably, the lifting drive mechanism includes a threaded sleeve and a drive screw. The threaded sleeve is fixedly connected to the top of the lifting seat, and the drive screw is rotatably connected to the middle of the landing gear. The drive screw is threadedly engaged with the internal thread of the threaded sleeve. An electric motor is installed inside the turntable, and the bottom end of the drive screw is drivenly connected to the output end of the electric motor.

[0010] Preferably, a connecting seat is fixedly connected to the bottom of the landing gear, the connecting seat is fixedly connected to the top of the turntable, and a gas spring support rod is fixedly connected to the top of the connecting seat. The telescopic part of the gas spring support rod is fixedly connected to one side of the sliding sleeve.

[0011] Preferably, the rotary drive mechanism includes a servo motor and a drive gear. The servo motor is fixedly connected to the top of the base, and the drive gear is driven to the output end of the servo motor. An internal gear ring is fixedly connected to the bottom of the turntable, and the turntable and the internal gear ring are coaxial. The internal gear ring meshes with the drive gear.

[0012] Preferably, a support plate is fixedly connected to the top of the arc portion of the U-shaped guide rail, a suspension plate is fixedly connected to the top of the support plate, and an electromagnetic lock is fixedly connected to the bottom of the suspension plate.

[0013] Preferably, the slider has a lower push hole in the middle, and the material loading fixture has an upper push hole that communicates with the lower push hole. The diameter of the upper push hole is larger than that of the lower push hole.

[0014] Preferably, the top of the base is provided with a positioning groove, an electric push rod is fixedly connected inside the positioning groove, and a push column adapted to the lower push hole is fixedly connected to the top of the electric push rod.

[0015] Preferably, at least one of the aforementioned material-carrying fixtures has material inserted inside, and the outer diameter of the material is larger than the diameter of the lower push hole.

[0016] Compared with the prior art, the present invention provides a rotary feeding mechanism for practical training and assessment of programmable controller systems, which has the following beneficial effects: 1. This rotary feeding mechanism for practical training and assessment of programmable logic controller (PLC) systems, through the setting of a turntable, U-shaped guide rail, electromagnetic lock, limit block, elastic band, and pressure switch, achieves continuous feeding at multiple stations by rotating the turntable and U-shaped guide rail, significantly improving the feeding efficiency in the training and assessment equipment; the cooperation between the electromagnetic lock and the limit block ensures positioning accuracy and prevents the slider from deviating during movement; the synergistic effect of the elastic band and pressure switch provides automatic reset and buffering functions, reducing the need for manual adjustment, and is particularly suitable for high-frequency operation scenarios, while the buffering protection extends the service life of the pressure switch.

[0017] 2. This rotary feeding mechanism for practical training and assessment of programmable logic controller (PLC) systems features a gas spring support rod fixed between the connecting seat and the sliding sleeve. This enhances the rigidity of the mechanism and prevents the lifting seat from tilting. When the lifting seat moves downward, the gas spring support rod retracts and acts as a buffer, facilitating accurate positioning of the clamping mechanism. After the clamping mechanism clamps the material, the lifting seat moves upward. At this time, the load on the lifting seat increases, and the gas spring support rod provides auxiliary support force to offset part of the load weight, reducing the torque requirement of the drive screw and making the lifting process smoother.

[0018] 3. This rotary feeding mechanism for practical training and assessment of programmable controller systems is equipped with an electric push rod, a lower push hole, and a push column. The diameter of the material is larger than the diameter of the lower push hole. When naturally placed, it is stuck in the upper push hole of the loading fixture. The difference in hole diameter provides support to the bottom of the material, improving the loading reliability of the loading fixture. The electric push rod is fixed in the positioning groove of the base. When the loading fixture reaches the material picking position, the electric push rod lifts the push column, penetrates the lower push hole, and pushes the material out. It works in conjunction with the clamping mechanism to facilitate material picking. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a rotary feeding mechanism for practical training and assessment of programmable controller systems proposed in this invention. Figure 2This is a schematic diagram of the engagement of the internal gear ring and the drive gear in a rotary feeding mechanism for practical training and assessment of programmable controller systems proposed in this invention. Figure 3 This is a schematic diagram of an upgraded drive mechanism and clamping mechanism for a rotary feeding mechanism used in practical training and assessment of programmable controller systems, as proposed in this invention. Figure 4 This is a schematic diagram of the electric push rod and push column structure of a rotary feeding mechanism for practical training and assessment of programmable controller systems proposed in this invention. Figure 5 This is a schematic diagram of the assembly structure of the U-shaped guide rail and slider of a rotary feeding mechanism for application training and assessment of programmable controller systems proposed in this invention. Figure 6 This is a schematic diagram of the limiting block and elastic band structure of a rotary feeding mechanism for practical training and assessment of programmable controller systems proposed in this invention. Figure 7 This is a top view of a rotary feeding mechanism for practical training and assessment of programmable controller systems proposed in this invention. Figure 8 This is a left view of a rotary feeding mechanism for practical training and assessment of programmable controller systems proposed in this invention.

[0020] In the diagram: 1. Base; 2. Turntable; 3. Connecting seat; 4. Landing gear; 5. Lifting seat; 6. Threaded sleeve; 7. Drive screw; 8. Electric slide rail; 9. Cylinder; 10. Gas spring support rod; 11. Turntable; 12. U-shaped guide rail; 13. Material loading fixture; 14. Material; 15. Positioning groove; 16. Electric push rod; 17. Servo motor; 19. Internal gear ring; 20. Drive gear; 21. Sliding sleeve; 22. Crank arm; 23. Clamp; 24. Rubber pad; 25. Air pipe connector; 26. Slider; 27. Lower push hole; 28. Push column; 29. ​​Limit block; 30. Locking hole; 31. Partition plate; 32. Elastic band; 33. Support plate; 34. Suspension plate; 35. Electromagnetic lock; 36. Reset button; 37. Bracket; 38. Pressure switch. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] Reference Figures 1-8A rotary feeding mechanism for practical training and assessment of programmable controller system applications includes a base 1, a turntable 2, a landing gear 4, a lifting seat 5, a clamping mechanism, and a lifting drive mechanism. The turntable 2 is fixedly connected to the top of the base 1, the landing gear 4 is fixedly connected to the top of the turntable 2, the lifting seat 5 is slidably connected to the frame of the landing gear 4, the clamping mechanism is installed on one side of the lifting seat 5, and the lifting seat 5 is throttle connected to the lifting drive mechanism. The top of the turntable 2 is rotatably connected to the turntable 11, and the top of the base 1 is equipped with a rotary drive mechanism. The turntable 11 is driven by the output end of the rotary drive mechanism. Multiple U-shaped guide rails 12 are fixedly connected to the top of the turntable 11. The multiple U-shaped guide rails 12 are evenly and equiangularly distributed about the rotation center axis of the turntable 11. The U-shaped guide rail 12 has a sliding block 26 inside, and the top of the slider 26 is fixedly connected to the material carrier fixture 13. The U-shaped guide rail 12 consists of two parallel and symmetrically arranged straight rail sections and an arc section connecting the straight rail sections. The slider 26 is fixedly connected to the side of the arc section with a limit block 29. An electromagnetic lock 35 is installed on the top of the U-shaped guide rail 12. The block of the limit block 29 has a locking hole 30 adapted to the electromagnetic lock 35. Two partitions 31 are symmetrically fixed to the inner wall of the arc portion. The same elastic band 32 is fixedly connected between the two partitions 31. A bracket 37 is fixedly connected to one side of the limiting block 29. A pressure switch 38 is fixedly connected to the side of the bracket 37 near the arc portion. The pressure switch 38 corresponds to one of the partitions 31. A reset button 36 is provided on the top of the electromagnetic lock 35.

[0023] In use, the turntable 2 drives the turntable 11 to rotate through the rotary drive mechanism, so that multiple U-shaped guide rails 12 and the material-carrying fixtures 13 on them arrive at each workstation in sequence. When the loading fixture 13 reaches the loading station, press the reset button 36. The locking tongue of the electromagnetic lock 35 leaves the locking hole 30 of the limit block 29. At this time, the slider 26 can be slid out from between the two straight rails of the U-shaped guide rail 12. Before the limit block 29 is unlocked, the elastic band 32 is stretched due to the pressure of the limit block 29. After the limit block 29 is unlocked, the elastic band 32 pushes the slider 26 away from the arc of the U-shaped guide rail 12 by its own elasticity, making the removal of the slider 26 more convenient. After material 14 is installed into the loading fixture 13, the slider 26 is reinserted into the U-shaped guide rail 12 until the pressure switch 38 on the limit block 29 is pressed against the corresponding partition 31. At this time, the pressure switch 38 is triggered, and the electromagnetic lock 35 is controlled by the electrical signal to re-engage with the locking hole 30, fixing the position of the limit block 29, thereby completing the positioning of the slider 26, the loading fixture 13 and the material 14. During the triggering process of the pressure switch 38, the limit block 29 is blocked by the elastic band 32. The stretching deformation of the elastic band 32 buffers the triggering process of the pressure switch 38, effectively protecting the force-sensitive element of the pressure switch 38 and extending the service life of the device. When the pressure switch 38 triggers the electromagnetic lock 35, the rotary drive mechanism drives the turntable 11 to continue rotating, causing the material carrier fixture 13 to move sequentially to the subsequent workstation. The lower part of the clamping mechanism is set as the material picking station. The lifting drive mechanism can drive the lifting seat 5 to slide longitudinally along the landing gear 4, thereby controlling the lifting of the clamping mechanism and cooperating with the clamping mechanism to achieve lifting and picking of materials.

[0024] In this invention, the clamping mechanism includes an electric slide rail 8, a cylinder 9, a sliding sleeve 21, two curved arms 22, and two clamps 23. The electric slide rail 8 is fixedly connected to one side of the lifting seat 5, the sliding sleeve 21 is slidably connected to the electric slide rail 8, the two curved arms 22 are symmetrically installed on both sides of the sliding sleeve 21, the two cylinders 9 are respectively fixedly connected to the ends of the two curved arms 22, and the two clamps 23 are respectively fixedly connected to the telescopic parts of the two cylinders 9, and the two clamps 23 are symmetrically matched. The electric slide rail 8 drives the sliding sleeve 21 to move horizontally, so that the clamps 23 are aligned with the material 14 on the material carrier fixture 13. The cylinder 9 pushes the two curved arms 22 to drive the clamps 23 to close. After clamping the material 14, the electric slide rail 8 drives the sliding sleeve 21 to retract, and the lifting mechanism transfers the material in coordination. The combination of electric slide rail 8 and cylinder 9 enables precise linear clamping action. The structure is compact and the control is flexible. The design of symmetrical clamp 23 ensures a balanced distribution of clamping force, effectively preventing materials from slipping or tilting during transfer, and improving the stability and safety of training operations.

[0025] In this invention, rubber pads 24 are fixedly connected to the inner walls of both clamps 23, and air pipe connectors 25 are provided at the ends of the two cylinders 9 that are far apart from each other. The rubber pads 24 on the inner walls of the clamps 23 increase the friction with the material 14 and avoid scratching the surface of the material, which is especially suitable for clamping precision workpieces. The cylinders 9 are connected to an external air source through the air pipe connectors 25, which enhances the modularity of the equipment. When the clamps 23 are driven to close, the rubber pads 24 deform and fit against the surface of the material 14, which enhances the clamping firmness. The air source pressure is adjustable to adapt to materials 14 of different specifications.

[0026] In this invention, the lifting drive mechanism includes a threaded sleeve 6 and a drive screw 7. The threaded sleeve 6 is fixedly connected to the top of the lifting seat 5, and the drive screw 7 is rotatably connected to the middle of the landing gear 4. The drive screw 7 is threadedly engaged with the internal thread of the threaded sleeve 6. A motor is installed inside the turntable 2, and the bottom end of the drive screw 7 is driven to the output end of the motor. The motor drives the drive screw 7 to rotate, thereby driving the threaded sleeve 6 and the connected lifting seat 5 to move vertically along the landing gear 4. By controlling the forward and reverse rotation of the motor, the precise lifting of the lifting seat 5 is achieved. The screw drive structure has high precision and self-locking characteristics, ensuring the smoothness and positioning accuracy of the lifting process. The motor control is simple and easy to integrate with the PLC system, meeting the precise position control requirements in practical training and assessment. At the same time, its design of being installed inside the turntable 2 reduces operating noise, making it suitable for use in teaching environments.

[0027] In this invention, a connecting seat 3 is fixedly connected to the bottom of the landing gear 4, and the connecting seat 3 is fixedly connected to the top of the turntable 2. A gas spring support rod 10 is fixedly connected to the top of the connecting seat 3, and the telescopic part of the gas spring support rod 10 is fixedly connected to one side of the sliding sleeve 21. The gas spring support rod 10 is fixed between the connecting seat 3 and the sliding sleeve 21 to improve the rigidity of the lifting mechanism and prevent the lifting seat 5 from tilting. When the lifting seat 5 moves downward, the gas spring support rod 10 retracts and plays a buffering role, which facilitates the accurate positioning of the clamping mechanism. After the clamping mechanism clamps the material 14, the lifting seat 5 moves upward. At this time, the load on the lifting seat 5 increases, and the gas spring support rod 10 provides auxiliary support force to offset part of the load gravity, reduce the torque requirement of the drive screw 7, and make the lifting process more stable.

[0028] In this invention, the rotary drive mechanism includes a servo motor 17 and a drive gear 20. The servo motor 17 is fixedly connected to the top of the base 1, and the drive gear 20 is drivenly connected to the output end of the servo motor 17. An internal gear ring 19 is fixedly connected to the bottom of the turntable 11, and the turntable 11 and the internal gear ring 19 are coaxial. The internal gear ring 19 meshes with the drive gear 20. The servo motor 17 drives the drive gear 20 to rotate, and the drive gear 20 meshes with the internal gear ring 19 at the bottom of the turntable 11, driving the turntable 11 to rotate precisely at indexes. The encoder of the servo motor 17 feeds back angle signals to ensure accurate stopping at each station.

[0029] In this invention, a support plate 33 is fixedly connected to the top of the arc portion of the U-shaped guide rail 12, and a suspension plate 34 is fixedly connected to the top of the support plate 33. An electromagnetic lock 35 is fixedly connected to the bottom of the suspension plate 34. The electromagnetic lock 35 is fixed to the top of the arc portion of the U-shaped guide rail 12 through the support plate 33 and the suspension plate 34. The locking tongue of the electromagnetic lock 35 can be inserted vertically downward into the locking hole 30 of the limiting block 29.

[0030] In this invention, the slider 26 has a lower push hole 27 in the middle, and the material carrier 13 has an upper push hole that communicates with the lower push hole 27. The diameter of the upper push hole is larger than that of the lower push hole 27. The difference in diameter between the upper push hole of the material carrier 13 and the lower push hole 27 of the slider 26 allows the material 14 to be placed in the upper push hole of the material carrier 13.

[0031] In this invention, a positioning groove 15 is provided on the top of the base 1, and an electric push rod 16 is fixedly connected inside the positioning groove 15. A push column 28 adapted to the lower push hole 27 is fixedly connected to the top of the electric push rod 16. The electric push rod 16 is fixed in the positioning groove 15 of the base 1. When the material loading fixture 13 reaches the material picking position, the electric push rod 16 lifts the push column 28, penetrates the lower push hole 27 and pushes out the material 14, which works in conjunction with the clamping mechanism to facilitate material picking.

[0032] In this invention, at least one material-carrying fixture 13 has a material 14 inserted inside it. The outer diameter of the material 14 is larger than the diameter of the lower push hole 27. The diameter of the material 14 is larger than the diameter of the lower push hole 27. When placed naturally, it is stuck in the upper push hole of the material-carrying fixture 13. The difference in hole diameter provides support to the bottom of the material 14, thereby improving the material-carrying reliability of the material-carrying fixture 13.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rotary feeding mechanism for practical training and assessment of programmable controller systems, comprising a base (1), a turntable (2), a landing gear (4), a lifting seat (5), a clamping mechanism, and a lifting drive mechanism, wherein the turntable (2) is fixedly connected to the top of the base (1), the landing gear (4) is fixedly connected to the top of the turntable (2), the lifting seat (5) is slidably connected to the frame of the landing gear (4), the clamping mechanism is installed on one side of the lifting seat (5), and the lifting seat (5) is throttle-connected to the lifting drive mechanism, characterized in that: The top of the turntable (2) is rotatably connected to a turntable (11), and the top of the base (1) is equipped with a rotary drive mechanism. The turntable (11) is connected to the output end of the rotary drive mechanism. The top of the turntable (11) is fixedly connected to a plurality of U-shaped guide rails (12), and the plurality of U-shaped guide rails (12) are evenly and equiangularly distributed about the rotation center axis of the turntable (11); The U-shaped guide rail (12) has a sliding block (26) inside, and a material carrier fixture (13) is fixedly connected to the top of the slider (26). The U-shaped guide rail (12) consists of two parallel and symmetrically arranged straight rail sections and an arc section connected between the straight rail sections. The slider (26) is fixedly connected to a limit block (29) on the side near the arc section. An electromagnetic lock (35) is installed on the top of the U-shaped guide rail (12). The block of the limit block (29) has a locking hole (30) adapted to the electromagnetic lock (35). Two partitions (31) are symmetrically fixed on the inner wall of the arc part. The same elastic band (32) is fixedly connected between the two partitions (31). A bracket (37) is fixedly connected to one side of the limiting block (29). A pressure switch (38) is fixedly connected to the side of the bracket (37) near the arc part. The pressure switch (38) is correspondingly matched with one of the partitions (31). A reset button (36) is provided on the top of the electromagnetic lock (35).

2. The rotary feed mechanism for programmable controller system application practical training examination according to claim 1, characterized in that, The clamping mechanism includes an electric slide rail (8), a cylinder (9), a sliding sleeve (21), two crank arms (22) and two clamps (23). The electric slide rail (8) is fixedly connected to one side of the lifting seat (5). The sliding sleeve (21) is slidably connected to the electric slide rail (8). The two crank arms (22) are symmetrically installed on both sides of the sliding sleeve (21). The two cylinders (9) are respectively fixedly connected to the ends of the two crank arms (22). The two clamps (23) are respectively fixedly connected to the extension and retraction parts of the two cylinders (9), and the two clamps (23) are symmetrically matched.

3. The rotary feed mechanism for programmable controller system application practical training examination according to claim 2, characterized in that, The inner walls of the two clamps (23) are fixedly connected with rubber pads (24), and the two cylinders (9) are provided with air pipe joints (25) at their opposite ends.

4. The rotary feeding mechanism for practical training and assessment of programmable controller systems according to claim 1, characterized in that, The lifting drive mechanism includes a threaded sleeve (6) and a drive screw (7). The threaded sleeve (6) is fixedly connected to the top of the lifting seat (5), and the drive screw (7) is rotatably connected to the middle of the landing gear (4). The drive screw (7) is threadedly engaged with the internal thread of the threaded sleeve (6). The turntable (2) is equipped with a motor, and the bottom end of the drive screw (7) is connected to the output end of the motor.

5. A rotary feeding mechanism for practical training and assessment of programmable controller systems according to claim 4, characterized in that, The bottom of the landing gear (4) is fixedly connected to a connecting seat (3), which is fixedly connected to the top of the turntable (2). The top of the connecting seat (3) is fixedly connected to a gas spring support rod (10), and the telescopic part of the gas spring support rod (10) is fixedly connected to one side of the sliding sleeve (21).

6. A rotary feeding mechanism for practical training and assessment of programmable controller systems according to claim 1, characterized in that, The rotary drive mechanism includes a servo motor (17) and a drive gear (20). The servo motor (17) is fixedly connected to the top of the base (1), and the drive gear (20) is connected to the output end of the servo motor (17). An internal gear ring (19) is fixedly connected to the bottom of the turntable (11), and the turntable (11) and the internal gear ring (19) are coaxial. The internal gear ring (19) meshes with the drive gear (20).

7. A rotary feeding mechanism for practical training and assessment of programmable controller systems according to claim 1, characterized in that, The top of the arc portion of the U-shaped guide rail (12) is fixedly connected to a support plate (33), the top of the support plate (33) is fixedly connected to a suspension plate (34), and the electromagnetic lock (35) is fixedly connected to the bottom of the suspension plate (34).

8. A rotary feeding mechanism for practical training and assessment of programmable controller systems according to claim 1, characterized in that, The slider (26) has a lower push hole (27) in the middle, and the material carrier (13) has an upper push hole connected to the lower push hole (27) inside. The diameter of the upper push hole is larger than that of the lower push hole (27).

9. A rotary feeding mechanism for practical training and assessment of programmable controller systems according to claim 8, characterized in that, The top of the base (1) is provided with a positioning groove (15), and an electric push rod (16) is fixedly connected inside the positioning groove (15). The top of the electric push rod (16) is fixedly connected with a push column (28) adapted to the lower push hole (27).

10. A rotary feeding mechanism for practical training and assessment of programmable controller systems according to claim 8, characterized in that, At least one of the aforementioned material-carrying fixtures (13) has a material (14) inserted inside, the outer diameter of which is larger than the diameter of the lower push hole (27).

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