Modular sander with interchangeable modules

Abstract

The utility model relates to the technical field of polisher discloses a modular polisher of changeable mould, including bottom shell, the outer surface fixedly connected with extension plate of bottom shell, the inner bottom wall fixedly connected with stepping motor of bottom shell, the inboard wall fixedly connected with stabilizing plate of bottom shell, the middle part inner wall fixedly connected with first ball bearing of stabilizing plate, the output and the inner ring of first ball bearing of stepping motor are fixedly connected with drive shaft, this device drives drive shaft to drive disc holder to rotate through stepping motor, three cylinders on disc holder install different polishing heads respectively, can switch target polishing head to work position in the rotating process, at this moment, other two polishing heads are in non - working state, and the corresponding structure is controlled to the polishing head after switching enters the work position through PLC programmable controller, and the replacement of different polishing heads can be completed without disassembling, avoids the component loss and the problem of precision decline caused by traditional frequent dismounting.

Description

Technical Field

[0001] This utility model relates to the field of grinding machine technology, and more specifically, to a modular grinding machine with interchangeable components. Background Technology

[0002] A grinding machine is a device that uses power to drive grinding tools (such as grinding wheels, sanding belts, grinding heads, etc.) to perform grinding, polishing, deburring, and other processing on the surface of a workpiece. It can change the flatness, roughness, and other states of the workpiece surface. In industrial production, it is widely used in fields such as machinery manufacturing, automobile repair, furniture processing, and hardware products. For example, it can be used for grinding the edges and corners of metal parts, polishing the surface of wooden furniture, and repairing defects in the paint of automobile bodies. It can effectively improve the appearance quality and precision of workpieces and is an indispensable piece of equipment in metal processing and surface treatment processes, helping to achieve efficient and precise surface treatment operations.

[0003] However, existing modular grinding machines typically require disassembling the old module and installing the new one when different types of grinding heads need to be replaced. This is not only cumbersome and time-consuming, but frequent disassembly and assembly can also lead to loosening and wear of connecting parts, affecting grinding accuracy and equipment stability. Furthermore, the existing structure makes it difficult to achieve quick and accurate docking between the grinding head and the motor, which can easily lead to unstable power transmission and fail to meet the needs of efficient continuous grinding operations. Utility Model Content

[0004] (a) Technical problems to be solved In view of the above situation and to overcome the defects of the prior art, this utility model provides a modular grinding machine, which aims to solve the problems in the background art.

[0005] (II) Technical Solution To achieve the above objectives, this application provides the following technical solution: a replaceable modular grinding machine, comprising a base shell, an extension plate fixedly connected to the outer surface of the base shell, a stepper motor fixedly connected to the inner bottom wall of the base shell, a stabilizing plate fixedly connected to the inner side wall of the base shell, a first ball bearing fixedly connected to the middle inner wall of the stabilizing plate, a drive shaft fixedly connected to the output end of the stepper motor and the inner ring of the first ball bearing, a disc frame fixedly connected to the top end of the drive shaft, three equidistant second ball bearings fixedly connected to the inner wall of the disc frame, and two arc-shaped blocks and two arc-shaped shells fixedly connected to the inner ring of each second ball bearing. Each pair of arc-shaped blocks... A cylinder is fixedly connected to one side of the three cylindrical blocks and the other side of the three arc-shaped shells. Three grinding heads of different models are fixedly connected to the top of each cylinder by bolts. A first electric push rod is fixedly connected to the inner top wall of each arc-shaped shell. A first connecting plate is fixedly connected to the telescopic end of each first electric push rod. Two sliding grooves are opened on the bottom surface of each cylinder. A sliding plate is slidably connected inside each sliding groove. A transmission shell is fixedly connected to the bottom surface of each pair of sliding plates. Two second connecting plates are fixedly connected to the two symmetrical sides of each transmission shell. A servo motor is fixedly connected to the upper surface of the extension plate. A rectangular transmission block is fixedly connected to the output end of the servo motor.

[0006] The present invention is further configured such that the drive shaft extends through to the top of the stabilizing plate, and the side of each pair of second connecting plates that are far apart from each other is fixedly connected to the side of each pair of first connecting plates that are close to each other. The rectangular transmission block is located directly below one of the transmission shells, and the outer surface of the rectangular transmission block is slidably connected to the inside of the transmission shell located directly above it. A base is fixedly connected to the bottom surface of the bottom shell, and four support feet are fixedly connected to the upper surface of the base. The top of each support foot is fixedly connected to the bottom surface of the extension plate, and a PLC programmable controller is fixedly connected to the upper surface of the base.

[0007] The present invention is further configured such that a mounting base is fixedly connected to the middle of the upper surface of the disc frame, and three equidistant second electric push rods are fixedly connected to the outer surface of the mounting base. Each second electric push rod has an arc-shaped positioning rubber plate fixedly connected to its telescopic end. Each arc-shaped positioning rubber plate is aligned with the direction of the cylinder and located on its outer side. The PLC programmable controller is electrically connected to the stepper motor, the first electric push rod, the servo motor, and the second electric push rod respectively through wires.

[0008] The present invention is further configured such that an annular groove is fixedly connected to the upper surface of the extension plate, a thin-walled bearing is fixedly connected to the outer side of the inner wall of the annular groove, a balance ring is fixedly connected to the inner ring of the thin-walled bearing, the inner wall of the balance ring does not contact the inner ring of the inner wall of the annular groove, and a plurality of connecting posts are fixedly connected to the upper surface of the balance ring, the top end of each connecting post being fixedly connected to the bottom surface of the disc frame.

[0009] The present invention is further configured such that a through-beam sensor receiving end is fixedly connected to both the left and right sides of the rectangular transmission block, two symmetrical mounting plates are fixedly connected to the outer surface of each transmission shell, and a through-beam sensor transmitting end corresponding to the through-beam sensor receiving end is fixedly connected to the bottom surface of each mounting plate. The PLC programmable controller is electrically connected to the through-beam sensor receiving end and the through-beam sensor transmitting end respectively through wires.

[0010] The present invention is further configured such that a fixing ring is fixedly connected to the outer surface of the top end of the drive shaft, and the upper surface of the fixing ring is fixedly connected to the bottom surface of the disc frame.

[0011] (III) Beneficial Effects Compared with the prior art, the beneficial effects of this utility model are: 1. A stepper motor drives the drive shaft to rotate the disc frame. Three cylinders on the disc frame are respectively equipped with different grinding heads. During the rotation, the target grinding head can be switched to the working position. At this time, the other two grinding heads are in a non-working state. The servo motor is controlled by the PLC programmable controller to drive the cylinder to rotate so that the switched grinding head enters the working position. Different grinding heads can be replaced without disassembly, avoiding the problems of component wear and precision reduction caused by frequent disassembly and assembly in the traditional method. It also solves the defects of cumbersome operation and long time consumption. 2. Once the target grinding head is switched into position, the first electric push rod pushes the transmission housing downwards, causing the rectangular transmission block at the output end of the servo motor to embed into the transmission housing. When the servo motor is running, it only drives this transmission housing and the connected cylinder and grinding head to rotate. The other two grinding heads remain stationary because they are not docked with the rectangular transmission block. This single transmission docking structure ensures that only one grinding head works at a time. Combined with the precise positioning of the through-beam sensor, it ensures stable power transmission, avoids the chaos caused by multiple grinding heads working at the same time, and meets the requirements of efficient continuous operation. Attached Figure Description

[0012] Figure 1 This is a three-dimensional overall structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the stepper motor and servo motor drive of this utility model; Figure 3This is a three-dimensional sectional view of the bottom shell of this utility model; Figure 4 This is a three-dimensional structural diagram of the disc frame of this utility model; Figure 5 This is a three-dimensional cross-sectional view of the arc-shaped shell of this utility model; Figure 6 This is a cross-sectional three-dimensional structural diagram of the cylinder of this utility model.

[0013] In the diagram: 1. Base; 2. Extension plate; 3. Support foot; 4. PLC programmable controller; 5. Servo motor; 6. Disc frame; 7. Grinding head; 8. Arc block; 9. Arc shell; 10. Cylinder; 11. Connecting column; 12. Balance ring; 13. Fixing ring; 14. First electric push rod; 15. Stabilizing plate; 16. First ball bearing; 17. Stepper motor; 18. Drive shaft; 19. First connecting plate; 20. Bottom shell; 21. Through-beam sensor receiver; 22. Annular groove; 23. Thin-walled bearing; 24. Rectangular transmission block; 25. Second ball bearing; 26. Transmission shell; 27. Second connecting plate; 28. Mounting plate; 29. ​​Sliding plate; 30. Sliding groove; 31. Through-beam sensor transmitter; 32. Mounting base; 33. Second electric push rod; 34. Arc positioning rubber plate. Detailed Implementation

[0014] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0015] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0016] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0017] Please see Figures 1-6The system includes a base shell 20, an extension plate 2 fixedly connected to the outer surface of the base shell 20, a stepper motor 17 fixedly connected to the inner bottom wall of the base shell 20, a stabilizing plate 15 fixedly connected to the inner side wall of the base shell 20, a first ball bearing 16 fixedly connected to the middle inner wall of the stabilizing plate 15, a drive shaft 18 fixedly connected to the output end of the stepper motor 17 and the inner ring of the first ball bearing 16, a disc frame 6 fixedly connected to the top end of the drive shaft 18, three equidistant second ball bearings 25 fixedly connected to the inner wall of the disc frame 6, two arc-shaped blocks 8 that fit with the inner ring of each second ball bearing 25 and two arc-shaped shells 9 that fit with the inner ring of each second ball bearing 25 fixedly connected to the inner ring of each second ball bearing 25, and the side of each pair of arc-shaped blocks 8 that are close to each other and the arc-shaped shell 9 are fixedly connected to each other. On the side of each shell 9 that is close to each other, a cylinder 10 is fixedly connected. The top of each of the three cylinders 10 is fixedly connected to three different types of grinding heads 7 by bolts. The inner top wall of each arc-shaped shell 9 is fixedly connected to a first electric push rod 14. The telescopic end of each first electric push rod 14 is fixedly connected to a first connecting plate 19. The bottom surface of each cylinder 10 has two sliding grooves 30. The inside of each sliding groove 30 is slidably connected to a sliding plate 29. The bottom surface of each pair of sliding plates 29 is fixedly connected to a transmission shell 26. The two symmetrical sides of each transmission shell 26 are fixedly connected to two second connecting plates 27. The upper surface of the extension plate 2 is fixedly connected to a servo motor 5. The output end of the servo motor 5 is fixedly connected to a rectangular transmission block 24.

[0018] Specifically, the stepper motor 17 drives the drive shaft 18 to rotate stably within the first ball bearing 16. The drive shaft 18 then drives the disc frame 6 to rotate. The disc frame 6 cooperates with the arc block 8 and the arc shell 9 through the second ball bearing 25, so that the cylinder 10 and the grinding head 7 rotate synchronously with the disc frame 6. When it is necessary to switch the grinding head 7, the rotation of the disc frame 6 can move the target grinding head 7 to the working position. At the same time, the extension and retraction of the first electric push rod 14 can drive the transmission shell 26 to move along the sliding plate 29 within the sliding groove 30 through the first connecting plate 19 and the second connecting plate 27, which facilitates subsequent docking with the rectangular transmission block 24. This realizes the rapid switching of the grinding head 7, avoids the cumbersome traditional disassembly and replacement, and improves the work efficiency.

[0019] Please see Figures 1-6 The drive shaft 18 extends through to the top of the stabilizing plate 15. The sides of each pair of second connecting plates 27 that are far apart from each other are fixedly connected to the sides of each pair of first connecting plates 19 that are close to each other. The rectangular transmission block 24 is located directly below one of the transmission shells 26. The outer surface of the rectangular transmission block 24 is slidably connected to the inside of the transmission shell 26 located directly above it. The bottom surface of the bottom shell 20 is fixedly connected to the base 1. The upper surface of the base 1 is fixedly connected to four support feet 3. The top of each support foot 3 is fixedly connected to the bottom surface of the extension plate 2. The upper surface of the base 1 is fixedly connected to a PLC programmable controller 4.

[0020] Specifically, the fixed connection between the second connecting plate 27 and the first connecting plate 19 enables the power of the first electric push rod 14 to be effectively transmitted to the transmission housing 26. When the target grinding head 7 is in place, the first electric push rod 14 pushes the transmission housing 26 downward, so that the rectangular transmission block 24 is embedded in the transmission housing 26. The servo motor 5 can drive the transmission housing 26 and the connected cylinder 10 and grinding head 7 to rotate through the rectangular transmission block 24. The base 1 stably supports the extension plate 2 and the bottom shell 20 through the support feet 3. The PLC programmable controller 4 controls the action of each component to ensure the orderly switching and operation, solves the problem of unstable power transmission, and ensures the continuity of grinding operation.

[0021] Please see Figures 1-6 A mounting base 32 is fixedly connected to the middle of the upper surface of the disc frame 6. Three equidistant second electric push rods 33 are fixedly connected to the outer surface of the mounting base 32. An arc-shaped positioning rubber plate 34 is fixedly connected to the telescopic end of each second electric push rod 33. Each arc-shaped positioning rubber plate 34 is aligned with the direction of the cylinder 10 and located on its outer side. The PLC programmable controller 4 is electrically connected to the stepper motor 17, the first electric push rod 14, the servo motor 5, and the second electric push rods 33 through wires.

[0022] Specifically, after the grinding head 7 is switched into position, the PLC programmable controller 4 controls the second electric push rod 33 to extend from the mounting base 32, pushing the arc-shaped positioning rubber plate 34 closer to the cylinder 10 and tightly fitting it. The elasticity and friction of the arc-shaped positioning rubber plate 34 are used to position the cylinder 10, preventing the cylinder 10 from rotating inside the second ball bearing 25 through the arc-shaped block 8 and the arc-shaped shell 9 during the docking of the transmission housing 26 with the rectangular transmission block 24, which would cause unstable docking and affect the docking accuracy. After docking is completed, the second electric push rod 33 drives the arc-shaped positioning rubber plate 34 to reset.

[0023] Please see Figures 1-6 An annular groove 22 is fixedly connected to the upper surface of the extension plate 2. A thin-walled bearing 23 is fixedly connected to the outer side of the inner wall of the annular groove 22. A balance ring 12 is fixedly connected to the inner ring of the thin-walled bearing 23. The inner wall of the balance ring 12 does not contact the inner ring of the inner wall of the annular groove 22. A plurality of connecting posts 11 are fixedly connected to the upper surface of the balance ring 12. The top of each connecting post 11 is fixedly connected to the bottom surface of the disc frame 6.

[0024] Specifically, when the disc frame 6 rotates, the connecting column 11 drives the balance ring 12 to rotate synchronously along the annular groove 22 within the thin-walled bearing 23. The thin-walled bearing 23 reduces the friction between the balance ring 12 and the annular groove 22, making the rotation of the disc frame 6 more stable. The balance ring 12 and the connecting column 11 provide auxiliary support for the disc frame 6, counteracting the centrifugal force generated when the disc frame 6 rotates, preventing the equipment from shaking. Together with the main support of the drive shaft 18, this improves the stability of the overall structure and ensures the accuracy of the grinding head 7 when it operates at high speed.

[0025] Please see Figures 1-6 The rectangular transmission block 24 has a through-beam sensor receiver 21 fixedly connected to both sides. The outer surface of each transmission housing 26 has two symmetrical mounting plates 28 fixedly connected. The bottom surface of each mounting plate 28 has a through-beam sensor transmitter 31 corresponding to the through-beam sensor receiver 21 fixedly connected. The PLC programmable controller 4 is electrically connected to the through-beam sensor receiver 21 and the through-beam sensor transmitter 31 respectively through wires. The outer surface of the top end of the drive shaft 18 has a fixed ring 13 fixedly connected. The upper surface of the fixed ring 13 is fixedly connected to the bottom surface of the disc frame 6.

[0026] Specifically, when the transmission housing 26 mates with the rectangular transmission block 24, the transmitting end 31 of the through-beam sensor on the mounting plate 28 aligns with the receiving end 21 of the through-beam sensor on the rectangular transmission block 24. The signal is transmitted to the PLC programmable controller 4 through the wire. After confirming the accurate mating, the first electric push rod 14 drives the transmission housing 26 to move down along the sliding plate 29 in the sliding groove 30 through the first connecting plate 19 and the second connecting plate 27, so that the rectangular transmission block 24 is embedded in the transmission housing 26, ensuring the mating accuracy. The fixing ring 13 further fixes the drive shaft 18 and the disc frame 6, enhancing the connection strength and preventing the relative rotation of the two from affecting the accuracy. Through the accurate detection of the sensor and the reinforcement of the fixing ring 13, the problem of inaccurate mating is solved, ensuring the stability of the equipment operation and the grinding accuracy.

[0027] Working principle: The PLC programmable controller 4 controls the stepper motor 17 to drive the drive shaft 18 to rotate stably within the first ball bearing 16. The drive shaft 18 drives the disc frame 6 to rotate. The disc frame 6 cooperates with the arc block 8 and the arc shell 9 through the second ball bearing 25, so that the cylinder 10 and the grinding head 7 rotate synchronously with the disc frame 6, moving the target grinding head 7 to the working position. When the disc frame 6 rotates, it drives the balance ring 12 to rotate synchronously along the annular groove 22 within the thin-walled bearing 23 through the connecting column 11, reducing friction and providing auxiliary support to improve rotational stability. After the target grinding head 7 is in place, the PLC programmable controller 4 controls the second electric push rod 33 to push the arc positioning rubber plate 34 to fit against the cylinder 10, preventing it from rotating within the second ball bearing 25 and ensuring stable docking. At this time, the through-beam sensor on the mounting plate 28... The transmitter 31 is aligned with the receiver 21 of the through-beam sensor on the rectangular transmission block 24. The signal is transmitted to the PLC programmable controller 4 for calibration. Then, the first electric push rod 14 drives the transmission housing 26 to move down along the sliding plate 29 in the sliding groove 30 through the first connecting plate 19 and the second connecting plate 27, so that the rectangular transmission block 24 is embedded in the transmission housing 26. After the PLC programmable controller 4 confirms the precise alignment, the servo motor 5 drives the rectangular transmission block 24, the transmission housing 26, the cylinder 10 and the grinding head 7 to rotate. The fixing ring 13 enhances the connection strength between the drive shaft 18 and the disc frame 6. The base 1 stably supports the overall structure through the support feet 3, realizing the rapid switching and stable operation of the grinding head 7, avoiding the cumbersome disassembly and replacement of traditional methods and the problem of unstable power transmission, and improving the work efficiency and accuracy.

[0028] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A changeable die modular sander comprising a base housing (20), characterized in that: An extension plate (2) is fixedly connected to the outer surface of the bottom shell (20). A stepper motor (17) is fixedly connected to the inner bottom wall of the bottom shell (20). A stabilizing plate (15) is fixedly connected to the inner side wall of the bottom shell (20). A first ball bearing (16) is fixedly connected to the middle inner wall of the stabilizing plate (15). A drive shaft (18) is fixedly connected to the output end of the stepper motor (17) and the inner ring of the first ball bearing (16). A disc frame (6) is fixedly connected to the top end of the drive shaft (18). Three equidistant second ball bearings (25) are fixedly connected to the inner wall of the disc frame (6). Two arc-shaped blocks (8) that fit with the inner ring of the second ball bearing (25) and two arc-shaped shells (9) that fit with the inner ring of the second ball bearing (25) are fixedly connected to the inner ring of each of the two arc-shaped blocks (8). The side of each pair of arc-shaped blocks (8) that are close to each other and the arc-shaped shells (9) are fixedly connected to each other. Each of the three cylinders (10) is fixedly connected to a cylinder (10) on one side that is close to each other. The top of each cylinder (10) is fixedly connected to a grinding head (7) of a different type by bolts. The inner top wall of each arc shell (9) is fixedly connected to a first electric push rod (14). The telescopic end of each first electric push rod (14) is fixedly connected to a first connecting plate (19). The bottom surface of each cylinder (10) has two sliding grooves (30). The inside of each sliding groove (30) is slidably connected to a sliding plate (29). The bottom surfaces of each pair of sliding plates (29) are fixedly connected to a transmission shell (26). The two symmetrical sides of each transmission shell (26) are fixedly connected to two second connecting plates (27). The upper surface of the extension plate (2) is fixedly connected to a servo motor (5). The output end of the servo motor (5) is fixedly connected to a rectangular transmission block (24).

2. A modular sander according to claim 1, wherein: The drive shaft (18) extends through the top of the stabilizing plate (15). The two second connecting plates (27) are fixedly connected to each other on opposite sides and to the two first connecting plates (19) on opposite sides. The rectangular transmission block (24) is located directly below one of the transmission shells (26). The outer surface of the rectangular transmission block (24) is slidably connected to the inside of the transmission shell (26) located directly above it. The bottom surface of the bottom shell (20) is fixedly connected to the base (1). The upper surface of the base (1) is fixedly connected to four support feet (3). The top of each support foot (3) is fixedly connected to the bottom surface of the extension plate (2). The upper surface of the base (1) is fixedly connected to a PLC programmable controller (4).

3. A changeable die modular sander as defined in claim 2, wherein: A mounting base (32) is fixedly connected to the middle of the upper surface of the disc frame (6). Three equidistant second electric push rods (33) are fixedly connected to the outer surface of the mounting base (32). An arc-shaped positioning rubber plate (34) is fixedly connected to the telescopic end of each second electric push rod (33). Each arc-shaped positioning rubber plate (34) is aligned with the direction of the cylinder (10) and located on its outer side. The PLC programmable controller (4) is electrically connected to the stepper motor (17), the first electric push rod (14), the servo motor (5), and the second electric push rod (33) through wires.

4. The modular sander of claim 1, wherein: An annular groove (22) is fixedly connected to the upper surface of the extension plate (2). A thin-walled bearing (23) is fixedly connected to the outer side of the inner wall of the annular groove (22). A balance ring (12) is fixedly connected to the inner ring of the thin-walled bearing (23). The inner wall of the balance ring (12) does not contact the inner ring of the annular groove (22). A plurality of connecting posts (11) are fixedly connected to the upper surface of the balance ring (12). The top of each connecting post (11) is fixedly connected to the bottom surface of the disc frame (6).

5. A changeable die modular sander as in claim 2, wherein: The rectangular transmission block (24) has a through-beam sensor receiver (21) fixedly connected to both sides. Each transmission shell (26) has two symmetrical mounting plates (28) fixedly connected to its outer surface. Each mounting plate (28) has a through-beam sensor transmitter (31) fixedly connected to its bottom surface, corresponding to the through-beam sensor receiver (21). The PLC programmable controller (4) is electrically connected to the through-beam sensor receiver (21) and the through-beam sensor transmitter (31) respectively via wires.

6. A changeable die modular sander as in claim 5, wherein: A fixing ring (13) is fixedly connected to the outer surface of the top end of the drive shaft (18), and the upper surface of the fixing ring (13) is fixedly connected to the bottom surface of the disc frame (6).

Images