Rubber ball pan-type surface sander

Abstract

The application relates to a rubber ball mill disc type surface polishing machine, which comprises a rack, a lower mill disc, an upper mill disc, a rotating driving part and a lifting driving part, the upper surface of the lower mill disc is provided with a plurality of concentric raceways, the top of the rack is further provided with an annular circulating material groove, one side of the upper mill disc is provided with an opening and is fixed with a U-shaped baffle at the opening to form a feeding and discharging port, the annular circulating material groove is provided with an inner ring baffle, an outer ring baffle and a separation part, the inner ring baffle is provided with a notch at the position corresponding to the feeding and discharging port, the middle part of the U-shaped baffle is further fixed with a partition plate, the partition plate is vertically slidably assembled between the separation part, and the separation part and the partition plate are located in the middle part of the notch and cooperate with the U-shaped baffle to form a ball feeding port and a ball discharging port. The rubber ball mill disc type surface polishing machine can ensure that each rubber ball can automatically undergo multiple cycles of polishing and polishing treatment, and does not need to additionally arrange workers to carry out feeding and discharging operations, so that the working efficiency is higher.

Description

Technical Field

[0001] This application relates to the field of rubber ball processing technology, and in particular to a rubber ball grinding disc type surface polishing machine. Background Technology

[0002] Most existing vertical ball grinding machines adopt an upper and lower plate structure. The lower plate (sand disc) is a rotating working disc with multiple concentric raceways, while the upper plate (fixed plate) is an adjustable distance pressure plate. During operation, the upper and lower plates approach each other and rely on friction to drive the balls to roll and achieve the grinding effect.

[0003] For example, Chinese patent application number CN201910104309.8 discloses an automatic ball grinding machine with variable ball diameter, which consists of a hydraulic cylinder, guide columns, an upper plate, a lower plate, a base, a movable crossbeam, a main shaft, and a motor. The base has weight-reducing holes, the lower plate is set on the upper surface of the base, four guide columns are evenly distributed on the base, and the movable crossbeam is slidably connected to each guide column. The hydraulic cylinder is connected to the movable crossbeam and drives the movable crossbeam to move up and down along the guide columns. At the same time, the upper plate is fixed below the movable crossbeam, and the movable crossbeam can drive the upper plate to move up and down. The motor is connected to the upper or lower plate through the main shaft and drives the main shaft to rotate through a reducer and a pulley to control the rotation of the upper or lower plate. The surface of the lower plate is provided with multiple concentric raceways, and the upper plate is also provided with a wedge-shaped feeding port, the opening direction of the wedge-shaped feeding port facing the innermost raceway of the lower plate.

[0004] Regarding the aforementioned related technologies, the inventors believe that the following defects exist:

[0005] In common ball grinding machines, the balls typically enter from the upper plate and are polished on the concentric raceway for one cycle before being discharged from the lower plate. To ensure the roundness and surface smoothness of the balls, they generally need to undergo multiple cycles of polishing and grinding, which takes about 7-8 hours. During the intervals between each processing cycle, staff need to frequently load and unload the balls, resulting in low processing efficiency. Summary of the Invention

[0006] This application provides a rubber ball grinding disc type surface polishing machine to improve the following technical problems:

[0007] The spheres generally require multiple cycles and about 7-8 hours of polishing and grinding. During the intervals between each processing cycle, separate staff are needed to frequently load and unload the materials, resulting in low processing efficiency and making it very troublesome to remove the powder and abrasive from the concentric raceway.

[0008] This application provides a rubber ball grinding disc type surface polishing machine, which adopts the following technical solution:

[0009] A rubber ball grinding disc type surface polishing machine includes a frame, a lower grinding disc, and an upper grinding disc. The upper surface of the lower grinding disc is provided with multiple concentric raceways, and the concentric raceways contain powder abrasive for grinding and polishing. The top of the frame is also provided with a horizontally arranged annular circulating material trough. One side of the upper grinding disc has an opening, and a vertically arranged U-shaped baffle is fixed at the opening to form an inlet and outlet. The annular circulating material trough has an inner ring baffle, an outer ring baffle, and a partition. The inner ring baffle has a notch corresponding to the inlet and outlet. A vertically arranged partition is fixed in the middle of the U-shaped baffle. The partition and the partition are both located in the middle of the notch and cooperate with the U-shaped baffle to form an inlet and an outlet.

[0010] In one feasible technical solution of this application, the partition is further provided with a discharge baffle on the side near the ball outlet. The discharge baffle is used to scoop out the rubber balls in the concentric raceway and guide them into the annular circulating material trough. The discharge baffle includes a vertically arranged arc guide plate and a discharge block. The discharge block is installed at the bottom of the arc guide plate, and the bottom of the discharge block is provided with multiple spaced and inclined shovel teeth, which are arranged one-to-one with the concentric raceway. The height of the shovel teeth relative to the concentric raceway is adjusted vertically along the partition of the discharge block, and is controlled by a lock. Firmware positioning; the shovel teeth include a tooth body covered with a rubber layer, and the unloading block is equipped with a drive component that drives the tooth body to swing vertically; when grinding rubber balls, the shovel teeth are positioned in the corresponding concentric raceway by adjusting the fasteners, and the shovel teeth are higher than the concentric raceway to allow the powder abrasive to move; when changing the powder abrasive, the shovel teeth move down to the bottom of the concentric raceway by adjusting the fasteners downward and swing downward by the drive component to make the rubber layer fit the bottom and side surfaces of the concentric raceway, thereby cutting off the powder abrasive.

[0011] In one feasible technical solution of this application, it further includes a rotation drive unit and a lifting drive unit. The lower grinding disc is horizontally arranged and rotatably mounted on the top of the frame. The rotation drive unit is installed at the bottom of the frame and drives the lower grinding disc to rotate. The lifting drive unit is installed at the top of the frame and is used to drive the upper grinding disc to rise or fall. The lower grinding disc and the upper grinding disc are both located in the middle of the annular circulating material trough. The outer side of the partition plate is vertically slidably mounted with the partition. The bottom of the shovel teeth has a circular arc structure and extends into the corresponding concentric raceway.

[0012] In one feasible technical solution of this application, the partition includes a first arc plate, and an inner ring baffle is provided with a feeding ramp on one side of the notch. The first arc plate and the feeding ramp form an arc-shaped ball-in-the-hole channel at the ball-in-the-hole. The partition also includes a second arc plate, and an inner ring baffle is provided with a discharge ramp on the other side of the notch. The second arc plate and the discharge ramp form an arc-shaped ball-out-the-hole channel at the ball-out-the-hole.

[0013] In one feasible technical solution of this application, multiple reinforcing ribs are further provided between the first arc plate and the second arc plate.

[0014] In one feasible technical solution of this application, the partition plate is provided with multiple vertical slots, and the locking fastener is a wing nut inserted into the vertical slot. One end of the wing nut is threaded to the unloading block. When the wing nut is tightened, the unloading block is fixed on the partition plate to achieve vertical positioning. When the wing nut is loosened, the unloading block moves vertically along the partition plate to achieve position adjustment.

[0015] In one feasible technical solution of this application, a cavity is provided inside the unloading block, and a rotating shaft is rotatably connected inside the cavity. All the teeth are fixed together and the teeth and the rotating shaft can rotate vertically. An abutment block is fixed at the upper end of the teeth, and the abutment block has an arc-shaped surface. The driving assembly includes a cylinder and a return spring located inside the cavity. An inclined block is fixed to the piston rod of the cylinder, and the inclined block abuts against the arc-shaped surface. When the cylinder extends, the inclined block pushes the teeth to rotate downward around the rotating shaft. When the cylinder retracts, the return spring pushes the teeth back to the initial position.

[0016] In one feasible technical solution of this application, the U-shaped baffle is further provided with a vertically arranged combing plate on one side of the ball inlet. The combing plate is provided with multiple strip grooves, and the strip grooves and concentric raceways are arranged in a one-to-one correspondence. The bottom of the strip grooves is connected to the corresponding concentric raceways.

[0017] In one feasible technical solution of this application, the U-shaped baffle includes an arc panel and side panels disposed on both sides of the arc panel, and the U-shaped baffle as a whole is a flared structure that opens from the inside out.

[0018] In one feasible technical solution of this application, the lifting drive unit includes a portal frame and a worm gear screw jack installed at the top middle of the portal frame, and the middle part of the upper grinding disc is connected to the bottom of the screw of the worm gear screw jack; in another feasible technical solution of this application, the rotation drive unit includes a power shaft, a pulley transmission structure and a power motor, the power shaft is vertically fixed to the bottom of the lower grinding disc, and the power motor drives the power shaft to rotate through the pulley transmission structure.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] After the rubber ball slides into the concentric raceway from the ball inlet and is polished once, it slides out from the ball outlet into the annular circulation trough. It is then transported back to the ball inlet by the pushing action between adjacent rubber balls, ensuring that each rubber ball can automatically undergo multiple cycles of grinding and polishing. This eliminates the need for additional staff to perform loading and unloading operations, resulting in higher work efficiency.

[0021] Secondly, during the grinding process, different requirements for surface finish necessitate the replacement of powder abrasive. Removing powder abrasive from the concentric raceway is quite troublesome. In this invention, when replacing powder abrasive, the wing nut is loosened to move the shovel teeth down to the bottom of the concentric raceway. Then, the drive assembly drives the teeth to swing downwards, achieving a certain cutting effect on the powder abrasive. This allows users to quickly and precisely extract the abrasive using suction devices such as negative pressure suction pipes, greatly simplifying the abrasive replacement process.

[0022] The shovel teeth have two functions: when they rise, they can lift and guide the rubber ball; when they descend, they can retain the fine abrasive, making it easier for users to quickly suck out the old fine abrasive and quickly put in the new fine abrasive using a negative pressure suction pipe, thus achieving the purpose of quickly replacing the fine abrasive. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the external structure of a rubber ball grinding disc type surface polishing machine according to an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the internal structure of a rubber ball grinding disc type surface polishing machine according to an embodiment of this application.

[0026] Figure 3 This is a schematic diagram of the structure of the partition in an embodiment of this application.

[0027] Figure 4 This is a schematic diagram of the unloading baffle in the embodiment of this application.

[0028] Figure 5 This is a schematic diagram of the structure of the lower and upper grinding discs in the embodiments of this application.

[0029] Figure 6 This is a schematic diagram showing the positional relationship between the shovel teeth and the combing plate in an embodiment of this application.

[0030] Figure 7 This is a schematic diagram showing the positional relationship between the bottom of the concentric raceway and the tooth body after the concentric raceway is cut open in an embodiment of this application.

[0031] Figure 8 This is a schematic diagram of the butterfly nut locking unloading block and partition in an embodiment of this application.

[0032] Figure 9This is a schematic diagram showing the position of the shovel teeth on the unloading block in an embodiment of this application.

[0033] Figure 10 yes Figure 9 Sectional view at point AA.

[0034] Figure 11 This is a schematic diagram illustrating the state changes of the tooth body rotating around the axis in an embodiment of this application.

[0035] Figure 12 This is a schematic diagram of seven teeth connected to a rotating shaft in an embodiment of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Rack;

[0038] 2. Lower millstone; 21. Concentric rollers;

[0039] 3. Place the grinding disc;

[0040] 4. Rotary drive unit; 41. Power shaft; 42. Belt drive structure; 43. Power motor;

[0041] 5. Lifting drive unit; 51. Gantry frame; 52. Worm gear screw jack;

[0042] 6. Annular circulating material trough; 61. Inner ring baffle; 611. Feeding inclined plate; 612. Discharge inclined plate; 62. Outer ring baffle; 63. Divider; 631. First arc plate; 632. Second arc plate; 633. Reinforcing rib plate; 64. Discharge baffle; 641. Arc guide plate; 642. Discharge block; 6421. Shovel teeth;

[0043] 7. U-shaped baffle; 71. Arc panel; 72. Side panel; 73. Combing plate; 731. Strip groove;

[0044] 8. Partition;

[0045] 10. Chassis;

[0046] 061. Vertical groove; 062. Wing nut; 064. Cavity; 065. Rubber layer; 066. Tooth; 067. Arc-shaped surface; 068. Shaft; 069. Inclined block; 071. Cylinder; 072. Return spring;

[0047] A. Inlet; B. Outlet. Detailed Implementation

[0048] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the scope of the present application.

[0049] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0050] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0052] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0053] A rubber ball grinding disc type surface polishing machine, as described in the reference Figure 1-5 The rubber ball grinding disc surface polishing machine includes a housing 10, a frame 1, a lower grinding disc 2, an upper grinding disc 3, a rotation drive unit 4, and a lifting drive unit 5. The frame 1, lower grinding disc 2, upper grinding disc 3, rotation drive unit 4, and lifting drive unit 5 are all installed inside the housing 10, and the front of the housing 10 is provided with an observation window. The lower grinding disc 2 is horizontally arranged and rotatably mounted on the top of the frame 1. The rotation drive unit 4 is installed at the bottom of the frame 1 and drives the lower grinding disc 2 to rotate. The lifting drive unit 5 is installed on the top of the frame 1 and is used to drive the upper grinding disc 3 to rise or fall. The upper surface of the lower grinding disc 2 is provided with multiple concentric raceways 21, and the concentric raceways 21 contain grinding and polishing powder. The abrasive is also provided with a horizontally arranged annular circulating material trough 6 on the top of the frame 1. The lower grinding disc 2 and the upper grinding disc 3 are both located in the middle of the annular circulating material trough 6. The upper grinding disc 3 has an opening on one side and a vertically arranged U-shaped baffle 7 is fixed at the opening to form an inlet and outlet. The annular circulating material trough 6 has an inner ring baffle 61, an outer ring baffle 62 and a partition 63. The inner ring baffle 61 has a notch at the corresponding position of the inlet and outlet. A vertically arranged partition 8 is also fixed in the middle of the U-shaped baffle 7. The outer side of the partition 8 is vertically slidably assembled with the partition 63. The partition 63 and the partition 8 are both located in the middle of the notch and cooperate with the U-shaped baffle 7 to form an inlet A and an outlet B.

[0054] The U-shaped baffle 7 includes an arc panel 71 and side panels 72 on both sides of the arc panel 71. The U-shaped baffle 7 is a flared structure that opens from the inside out. The lifting drive unit 5 includes a portal frame 51 and a worm gear screw jack 52 installed at the top middle of the portal frame 51. The middle part of the upper grinding disc 3 is connected to the bottom of the screw of the worm gear screw jack 52. The rotation drive unit 4 includes a power shaft 41, a pulley transmission structure 42 and a power motor 43. The power shaft 41 is vertically fixed to the bottom of the lower grinding disc 2. The power motor 43 drives the power shaft 41 to rotate through the pulley transmission structure 42.

[0055] In this embodiment, to ensure that the rubber ball can automatically and smoothly slide from the inlet A into the space between the lower grinding disc 2 and the upper grinding disc 3, the partition 63 includes a first arc plate 631, and an inner ring baffle 61 with a feeding ramp 611 on one side of the notch. The first arc plate 631 and the feeding ramp 611 form an arc-shaped inlet channel at the inlet A. To ensure that the rubber ball can automatically and smoothly slide out from the outlet B into the space between the lower grinding disc 2 and the upper grinding disc 3, the partition 63 also includes a second arc plate 632, and an inner ring baffle 61 with an outlet ramp 612 on the other side of the notch. The second arc plate 632 and the outlet ramp 612 form an arc-shaped outlet channel at the outlet B. At the same time, to improve the structural strength and stability of the first arc plate 631 and the second arc plate 632, multiple reinforcing ribs 633 are also provided between the first arc plate 631 and the second arc plate 632.

[0056] In this embodiment, in order to ensure that the rubber ball after processing can quickly slide from the ball outlet B into the annular circulating material trough 6, the partition 63 is also provided with a discharge baffle 64 on the side near the ball outlet B. The discharge baffle 64 is used to scoop out the rubber ball in the concentric raceway 21 and guide it into the annular circulating material trough 6. Specifically, the discharge baffle 64 includes a vertically arranged arc guide plate 641 and a discharge block 642. The discharge block 642 is installed at the bottom of the arc guide plate 641, and the bottom of the discharge block 642 is provided with a plurality of spaced and inclined shovel teeth 6421. The shovel teeth 6421 and the concentric raceway 21 are arranged one-to-one. The bottom of the shovel teeth 6421 is an arc structure and extends into the corresponding concentric raceway 21.

[0057] In this embodiment, in order to ensure that the multiple rubber balls at the ball inlet A can automatically slide down and be distributed into each concentric raceway 21, the U-shaped baffle 7 is also provided with a vertically arranged combing plate 73 on one side of the ball inlet A. The combing plate 73 is provided with multiple strip grooves 731, and the strip grooves 731 and the concentric raceways 21 are arranged in a one-to-one correspondence. The bottom of the strip grooves 731 is connected to the corresponding concentric raceway 21.

[0058] Reference Figure 6-12The unloading block 642 adjusts the height of the shovel teeth 6421 relative to the concentric raceway 21 vertically along the partition plate 8, and positions them by means of the locking fasteners;

[0059] The partition 8 has three vertical slots 061, and the locking fastener is a wing nut 062 inserted into the vertical slot 061. One end of the wing nut 062 is threaded to the unloading block 642, and the other end of the wing nut 062 abuts against the partition 8.

[0060] Three wing nuts 062 are used to lock the partition 8 and the unloading block 642, which not only ensures that the unloading block 642 is stably fixed to the partition 8, but also increases the locking force between the two by adding friction pads between the cap of the wing nut 062 and the partition 8.

[0061] When the wing nut 062 is tightened, the unloading block 642 is fixed to the partition plate 8 to achieve vertical positioning, and the height of the shovel tooth 6421 remains unchanged; the rubber ball can slide out through the shovel tooth 6421, and the lower end of the shovel tooth 6421 and the bottom of the concentric raceway 21 are reserved with a gap for the free flow of powder abrasive.

[0062] When the wing nut 062 is loosened, the threaded part of the wing nut 062 moves up and down in the vertical groove 061. The vertical groove 061 guides the vertical movement of the wing nut 062. The unloading block 642 moves vertically on the partition plate 8 to adjust its position. The purpose of this adjustment is to adjust the distance between the shovel tooth 6421 and the bottom of the concentric raceway 21.

[0063] The shovel tooth 6421 includes a metal tooth body 066, and a rubber layer 065 is bonded and wrapped around the outside of the tooth body 066. The rubber layer 065 may be made of wear-resistant rubber.

[0064] The unloading block 642 has a cavity 064 inside, and a rubber layer 065 is wrapped around the tooth body 066. The upper end of the rubber layer 065 is bonded and fixed to the lower opening edge of the cavity 064. The rubber layer 065 has good elasticity, which can adapt to the swing of the tooth body 066 and fit tightly against the inner wall of the concentric raceway 21. Therefore, the rubber layer 065 can make adaptive elastic deformation when the body swings.

[0065] All seven teeth 066 are fixed horizontally as a single piece, and are formed by integral machining.

[0066] The cavity 064 is rotatably connected to the shaft 068, and the seven teeth 066 and the shaft 068 achieve a vertical rotational relationship.

[0067] The unloading block 642 is equipped with a drive assembly for vertically swinging the drive tooth body 066; the drive assembly includes a cylinder 071 and a return spring 072, both of which are located inside the cavity 064.

[0068] Cylinder 071 is a mini cylinder 071, which is installed in cavity 064 by screws. The flexible air tube of cylinder 071 extends out of cavity 064 for easy connection to air source.

[0069] A contact block is fixed to the upper end of the tooth body 066, and the contact block has an arc-shaped surface 067; the piston rod of the cylinder 071 is fixed with a inclined block 069, and the inclined surface of the inclined block 069 abuts against the arc-shaped surface 067.

[0070] A cylinder is fixed inside the cavity 064, and a return spring 072 is installed inside the cylinder. One end of the return spring 072 abuts against the tooth body 066, and the other end of the return spring 072 abuts against the bottom of the cylinder.

[0071] When cylinder 071 extends, inclined block 069 pushes gear body 066 to rotate downward around shaft 068.

[0072] When cylinder 071 retracts, return spring 072 pushes gear 066 back to its initial position.

[0073] Working principle

[0074] Reference Figure 7 , Figure 8 When grinding rubber balls, the shovel teeth 6421 are positioned within the corresponding concentric raceway 21 by adjusting the wing nut 062. The shovel teeth 6421 are higher than the bottom surface of the concentric raceway 21, leaving a gap for the flow of powder abrasive. There is also a gap between the shovel teeth 6421 and the side of the concentric raceway 21.

[0075] Reference Figure 8 , Figure 11 When changing the fine abrasive, loosen the wing nut 062 and adjust the unloading block 642 downwards, so that the shovel tooth 6421 moves down to the bottom of the concentric raceway 21. Then, drive the tooth body 066 downwards through the drive assembly, so that the rubber layer 065 is tightly attached to the bottom and side of the concentric raceway 21, thereby cutting off the fine abrasive.

[0076] Because the front section of the shovel tooth 6421 is small, it can be completely embedded in the corresponding concentric raceway 21 after being moved down. With the rotation of the tooth body 066, the rubber layer 065 is tightly attached to the inner wall of the raceway. The flowing powder abrasive is cut off and gathered at the shovel tooth 6421. Users can quickly extract the abrasive at a fixed point using suction devices such as negative pressure suction pipes, which greatly simplifies the abrasive replacement process.

[0077] The embodiments of this application also have the following beneficial technical effects.

[0078] After the rubber ball slides into the concentric raceway 21 from the ball inlet A and is polished once, it slides out from the ball outlet B into the annular circulating material trough 6. It is then transported back to the ball inlet A through the pushing action between adjacent rubber balls. This ensures that each rubber ball can automatically undergo multiple cycles of grinding and polishing without the need for additional staff to perform loading and unloading operations. This increases work efficiency and allows the rubber balls to be accurately processed to the expected size and precision within a preset time. The roundness and surface smoothness can be significantly improved, and the product qualification rate is greatly increased.

[0079] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rubber ball grinding disc type surface polishing machine, comprising a frame (1), a lower grinding disc (2) and an upper grinding disc (3), wherein the upper surface of the lower grinding disc (2) is provided with multiple concentric raceways (21), and the concentric raceways (21) contain abrasive powder for grinding and polishing, characterized in that: The top of the frame (1) is also provided with a horizontally arranged annular circulating material trough (6). One side of the upper grinding disc (3) has an opening and a vertically arranged U-shaped baffle (7) is fixed at the opening to form an inlet and outlet. The annular circulating material trough (6) has an inner ring baffle (61), an outer ring baffle (62) and a partition (63). The inner ring baffle (61) has a notch at the corresponding position of the inlet and outlet. A vertically arranged partition (8) is fixed in the middle of the U-shaped baffle (7). The partition (63) and the partition (8) are both located in the middle of the notch and cooperate with the U-shaped baffle (7) to form an inlet (A) and an outlet (B).

2. The rubber ball grinding disc type surface polishing machine according to claim 1, characterized in that, The partition (63) is also provided with a discharge baffle (64) on the side near the ball outlet (B). The discharge baffle (64) is used to scoop out the rubber balls in the concentric raceway (21) and guide them into the annular circulating material trough (6). The unloading baffle (64) includes a vertically arranged arc guide plate (641) and an unloading block (642). The unloading block (642) is installed at the bottom of the arc guide plate (641), and the bottom of the unloading block (642) is provided with a plurality of spaced inclined shovel teeth (6421). The shovel teeth (6421) and the concentric raceway (21) are arranged in a one-to-one correspondence. The unloading block (642) adjusts the height of the shovel teeth (6421) relative to the concentric raceway (21) vertically along the partition (8) and positions them by fasteners; The shovel tooth (6421) includes a tooth body (066), the tooth body (066) is wrapped with a rubber layer (065), and the unloading block (642) is provided with a drive assembly for driving the tooth body (066) to swing vertically; When grinding rubber balls, the shovel teeth (6421) are positioned within the corresponding concentric raceway (21) by adjusting the locking fasteners, and the shovel teeth (6421) are higher than the concentric raceway (21) to allow the abrasive powder to move. When the powder abrasive is replaced, the shovel teeth (6421) move down to the bottom of the concentric raceway (21) by adjusting the locking fastener downwards and swinging downwards by the drive assembly to make the rubber layer (065) fit against the bottom and side surfaces of the concentric raceway (21) to cut off the powder abrasive.

3. The rubber ball grinding disc type surface polishing machine according to claim 2, characterized in that, It also includes a rotation drive unit (4) and a lifting drive unit (5). The lower grinding disc (2) is arranged horizontally and rotatably mounted on the top of the frame (1). The rotation drive unit (4) is installed at the bottom of the frame (1) and drives the lower grinding disc (2) to rotate. The lifting drive unit (5) is installed on the top of the frame (1) and is used to drive the upper grinding disc (3) to rise or fall. The lower grinding disc (2) and the upper grinding disc (3) are both located in the middle of the annular circulating material trough (6); The outer edge of the partition (8) is vertically slidably assembled with the partition (63); The bottom of the shovel tooth (6421) is an arc structure and extends into the corresponding concentric raceway (21).

4. The rubber ball grinding disc type surface polishing machine according to claim 3, characterized in that, The partition (63) includes a first arc plate (631), and an inner ring baffle (61) is provided with a feeding ramp (611) on one side of the notch. The first arc plate (631) and the feeding ramp (611) form an arc-shaped ball-in channel at the ball-in port (A). The partition (63) also includes a second arc plate (632), and the inner ring baffle (61) is provided with a discharge ramp (612) on the other side of the notch. The second arc plate (632) and the discharge ramp (612) form an arc-shaped ball discharge channel at the ball outlet (B).

5. The rubber ball grinding disc type surface polishing machine according to claim 4, characterized in that, Multiple reinforcing ribs (633) are also provided between the first arc plate (631) and the second arc plate (632).

6. The rubber ball grinding disc type surface polishing machine according to claim 3, characterized in that, The partition (8) has multiple vertical slots, and the fastener is a wing nut (062) inserted into the vertical slot (061). One end of the wing nut (062) is threaded to the unloading block (642). When the wing nut (062) is tightened, the unloading block (642) is fixed on the partition plate (8) to achieve vertical positioning; When the wing nut (062) is loosened, the unloading block (642) moves vertically along the partition (8) to achieve position adjustment.

7. The rubber ball grinding disc type surface polishing machine according to claim 6, characterized in that, The unloading block (642) has a cavity (064) inside, and a rotating shaft (068) is rotatably connected inside the cavity (064). All the teeth (066) are fixed together and the teeth (066) and the rotating shaft (068) can rotate vertically. The upper end of the tooth body (066) is fixed with an abutment block, and the abutment block is provided with an arc-shaped surface (067). The drive assembly includes a cylinder (071) and a return spring (072) located in the cavity (064). The piston rod of the cylinder (071) is fixed with a ramp block (069), and the ramp block (069) abuts against the arc surface (067). When the cylinder (071) extends, the inclined block (069) pushes the gear body (066) to rotate downward around the shaft (068); When the cylinder (071) retracts, the return spring (072) pushes the tooth body (066) back to the initial position.

8. The rubber ball grinding disc type surface polishing machine according to claim 3, characterized in that, The U-shaped baffle (7) is also provided with a vertically arranged combing plate (73) on one side of the ball inlet (A). The combing plate (73) is provided with multiple strip grooves (731). The strip grooves (731) and the concentric raceways (21) are arranged in a one-to-one correspondence. The bottom of the strip grooves (731) is connected to the corresponding concentric raceways (21).

9. The rubber ball grinding disc type surface polishing machine according to claim 3, characterized in that, The U-shaped baffle (7) includes an arc panel (71) and side panels (72) on both sides of the arc panel (71). The U-shaped baffle (7) as a whole is a flared structure that opens from the inside out.

10. The rubber ball grinding disc type surface polishing machine according to claim 3, characterized in that, The lifting drive unit (5) includes a portal frame (51) and a worm gear screw jack (52) installed at the middle of the top of the portal frame (51). The middle part of the upper grinding disc (3) is connected to the bottom of the screw of the worm gear screw jack (52). The rotation drive unit (4) includes a power shaft (41), a pulley transmission structure (42) and a power motor (43). The power shaft (41) is vertically fixed to the bottom of the lower grinding disc (2), and the power motor (43) drives the power shaft (41) to rotate through the pulley transmission structure (42).

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