High-stability lower grinding disc mechanism for polishing processing

Abstract

The utility model relates to the field of polishing processing, and specifically relates to a high-stability lower grinding disc mechanism for polishing processing, the first lower grinding disc includes annular guide rail fixed on the lower grinding disc seat and first annular rack coaxially arranged with the annular guide rail, and the mounting base for fixing the bearing station is slidingly installed on the annular guide rail, each mounting base is uniformly and interval arranged on the annular guide rail, the base drive gear is arranged on the mounting base, the base drive gear is driven at the same time with the first annular rack gear rack transmission, and drives the mounting base to travel along the annular guide rail. The utility model effectively avoids the lower grinding disc mechanism of the polishing machine to produce the jounce, guarantees that its parallelism reaches the design requirement.

Description

Technical Field

[0001] This utility model relates to the field of polishing, specifically a high-stability grinding disc mechanism for polishing. Background Technology

[0002] The lower grinding disc mechanism of the polishing machine serves as a support platform, carrying the workpiece to be polished. During polishing, the lower grinding disc mechanism is typically driven by a motor to rotate around its central axis, thereby causing the workpiece on it to rotate synchronously. Its specific structure, as described in publication number "CN109015373A", includes a frame, a plurality of lower disc assemblies, a lower disc revolving mechanism, and a control circuit. The lower disc revolving mechanism includes a main tray, which has the same number of support holes as the lower disc assemblies. Each lower disc assembly includes a secondary tray, a tray shaft, a bearing sleeve, a motor, and a reducer driven by the motor. The bearing sleeve is installed in the support holes, and the tray shaft is supported by bearings within the bearing sleeve. The secondary tray is fixed to the top of the tray shaft, and the motor and reducer are installed below the main tray. The lower part of the tray shaft is driven by the reducer.

[0003] The current traditional single-axis support drive for grinding disc rotation results in the workpiece-bearing tray being suspended. During the polishing process, if the pressure applied to the tray by each polishing disc is uneven, the tray will jump. In precision machining, the parallelism of the lower plate cannot meet the design requirements, so this problem urgently needs to be solved. Utility Model Content

[0004] To avoid and overcome the technical problems existing in the prior art, this utility model provides a highly stable lower grinding disc mechanism for polishing. This utility model effectively avoids the lower grinding disc mechanism of the polishing machine from running, ensuring that its parallelism meets the design requirements.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A high-stability lower grinding disc mechanism for polishing includes a first lower grinding disc comprising an annular guide rail fixed on a lower grinding disc base and a first annular rack arranged coaxially with the annular guide rail. A mounting base for fixing the bearing position is slidably mounted on the annular guide rail. The mounting bases are evenly spaced on the annular guide rail. A base drive gear is provided on the mounting base. The base drive gear engages with the first annular rack gear and drives the mounting base to move along the annular guide rail.

[0006] As a further embodiment of this utility model: each mounting base is provided with a base positioning groove radially along the annular guide rail, and a mounting base positioning assembly is provided on the lower grinding disc base. The mounting base positioning assembly includes a telescopic cylinder that rotates with the lower grinding disc base. A swing rod fixing seat is installed on the outer ring of the annular guide rail. The swing rod body rotates with the swing rod fixing seat. The rotation axes of the swing rod and the telescopic cylinder are parallel to the tangent of the annular guide rail. After being driven by the telescopic cylinder, the swing rod produces a swinging motion to engage with or disengage from the base positioning groove.

[0007] As a further improvement of this utility model: the diameter of the base positioning groove narrows from the opening to the bottom of the groove, and the locking end of the swing rod and the base positioning groove is provided with a positioning wheel that can roll along the base positioning groove. After being guided by the positioning wheel, the swing rod is locked and positioned with the base positioning groove.

[0008] As a further improvement of this utility model: the mounting base positioning components are arranged at uniform intervals around the annular guide rail, and the number of mounting base positioning components matches the number of mounting bases.

[0009] As a further improvement of this utility model: a base motor is installed on the mounting base, and the base drive gear is coaxially fixed on the motor shaft of the base motor.

[0010] As a further improvement of this utility model: each mounting base is provided with at least two sets of guide blocks, and the mounting base slides in cooperation with the annular guide rail through each guide block.

[0011] As a further embodiment of this utility model: the bearing station includes a bearing seat for fixing each bearing platform, the bearing drive gear is coaxially arranged with the bearing seat and is driven to rotate by the main drive motor; each bearing platform is evenly arranged around the bearing drive gear, each bearing platform is provided with a drive shaft along the axial direction, and each bearing driven gear is coaxially arranged on the drive shaft of each bearing platform, and each bearing driven gear is driven to rotate by the bearing drive gear.

[0012] As a further improvement of this utility model: the number of bearing platforms is N, and the ratio of the number of teeth of the bearing drive gear to the bearing driven gear is N:1.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, through the cooperation of the annular guide rail and the first annular rack, and the gear transmission driven by the base, ensures that multiple mounting bases can move synchronously and smoothly along a precise annular trajectory. Each bearing station operates independently with the mounting base, forming a non-single-axis supported lower grinding disc mechanism, which effectively avoids the lower grinding disc mechanism of the polishing machine from jumping and ensures that its parallelism meets the design requirements.

[0014] 2. The design of the mounting base positioning component of this utility model uses a telescopic cylinder to drive the swing rod, which engages with the positioning groove of the mounting base, thus locking it in place. This effectively prevents minor displacements that may occur at the workstation during polishing, ensuring the consistency and reliability of the processing. The positioning groove adopts a design where the diameter gradually narrows from the opening to the bottom, combined with the positioning wheel design, allowing the swing rod to be smoothly guided when engaging and disengaging from the positioning groove, reducing impact and wear. The number of mounting base positioning components matches the number of mounting bases, enabling each workstation to be independently positioned and controlled, improving the overall positioning accuracy.

[0015] 3. This utility model forms a stable multi-point support structure by slidingly engaging at least two sets of guide blocks with the annular guide rail, which improves the anti-overturning ability of the mounting base during movement and under polishing pressure, and further improves the posture stability of the workpiece on the bearing station.

[0016] 4. In this utility model, each bearing station is driven by a bearing drive gear that drives multiple bearing driven gears to rotate synchronously, thereby driving the workpieces on all bearing platforms to rotate, forming a planetary transmission method. This ensures that the motion trajectory of all workpieces in the same station is consistent, avoids long-term wear at a single point, and improves the uniformity of the polishing effect. The control of the gear ratio between the bearing drive gear and the bearing driven gear ensures that after the bearing drive gear rotates at a set angle, each bearing driven gear rotates exactly one revolution and returns to the initial state. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the polishing system in this utility model.

[0018] Figure 2 This is a schematic diagram of the upper grinding disc seat in this utility model.

[0019] Figure 3 for Figure 2 A schematic diagram of the structure of the center adjustment seat.

[0020] Figure 4 for Figure 1 A schematic diagram of the structure of the first lower grinding disc.

[0021] Figure 5 This is a schematic diagram showing the installation state of the annular guide rail of the first lower grinding disc in this utility model.

[0022] Figure 6 for Figure 1 A schematic diagram of the structure of the second lower grinding disc.

[0023] Figure 7 for Figure 6 Enlarged diagram of point A in the middle.

[0024] Figure 8 for Figure 6 Schematic diagram of the power source for the central bearing plate.

[0025] Figure 9 This is a schematic diagram of the structure of the bearing station in this utility model.

[0026] In the picture: 1. Upper grinding disc seat; 11. Main lifting seat; 12. Lifting cylinder; 13. Polishing motor; 14. Guide column; 15. Locating pin cylinder; 16. Adjusting seat; 161. Auxiliary lifting seat; 162. Adjusting cylinder seat; 163. Positioning slide rail; 164. Lifting slide; 165. Cylinder extension rod; 166. Locking nut; 167. Pressure sensor; 168. Rotary seat; 17. Polishing disc; 2. Lower grinding disc holder; 3. Protective seat; 31. Protective sleeve; 4. First grinding disc; 41. Circular guide rail; 42. Mounting base; 421. Base motor; 422. Base drive gear; 423. Base positioning groove; 424. Main drive motor; 425. Guide block; 43. First annular rack; 44. Mounting base positioning assembly; 441. Telescopic cylinder; 442. Swing rod; 4421. Positioning wheel; 443. Swing rod fixing seat; 5. Bearing station; 51. Bearing drive gear; 52. Bearing driven gear; 53. Support platform; 54. Support base; 6. Second grinding disc; 61. Rotary table; 611. Rotary table positioning groove; 62. Motor base; 63. Bearing plate; 64. Rotary table positioning assembly; 641. Cylinder guide rail; 642. Linear cylinder; 643. Positioning bearing; 65. Bearing station positioning component; 651. First positioning seat; 652. Second positioning seat; 653. Positioning cylinder; 654. Swing block; 6541. Rotating arm; 6542. Positioning cylinder; 66. Second ring rack; 67. Main drive gear; 671. Main drive gear motor; 68. Sealing baffle; 7. Positioning seat; 71. Positioning slot. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-9 In this embodiment of the utility model, a high-stability lower grinding disc mechanism for polishing specifically refers to... Figure 4 The first grinding wheel 4.

[0029] The polishing system in this application includes an upper grinding disc seat 1 and a lower grinding disc seat 2. A protective seat 3 connects the upper grinding disc seat 1 and the lower grinding disc seat 2. An annular protective sleeve 31 is provided on the protective seat 3. The protective sleeve 31 is arranged on the outer ring of each bearing station 5 and is at the same height as the polishing surface, which serves to provide safety protection and prevent polishing liquid from splashing.

[0030] The upper grinding disc seat 1 includes a main lifting seat 11, which is driven by a lifting cylinder 12 to move vertically. In this embodiment, two sets of upper grinding disc seats 1 are symmetrically arranged, and each upper grinding disc seat 1 is equipped with a lifting cylinder 12, thereby supporting and positioning the middle part of both ends of the main lifting seat 11 to improve the stability of the structure. To ensure smooth lifting of the main lifting seat 11, guide columns 14 are symmetrically arranged on both sides of the lifting cylinder 12 of the upper grinding disc seat 1 along the vertical direction, and the upper grinding disc seat 1 and the main lifting seat 11 are vertically slidingly engaged through the guide columns 14. At the same time, the surface of the upper grinding disc seat 1 is also provided with a positioning pin cylinder 15, and the main lifting seat 11 is provided with a corresponding positioning groove. When the main lifting seat 11 reaches the maximum downward position, the positioning pin cylinder 15 is inserted into the positioning groove of the main lifting seat 11 to support and position the main lifting seat 11 for precise limiting and support.

[0031] A polishing motor 13 is mounted on the main lifting base 11 to provide power for the rotation of the polishing discs 17. The main lifting base 11 also has multiple adjusting seats 16 corresponding to the number of polishing discs 17, with each polishing disc 17 fixed to the bottom of its corresponding adjusting seat 16. The adjusting seats 16 are driven by the polishing motor 13 to rotate as a whole, thereby causing the polishing discs 17 fixed on the adjusting seats 16 to rotate synchronously. Each adjusting seat 16 is used to independently drive its polishing disc 17 for fine-tuning, achieving the polishing requirements of different workpieces.

[0032] The adjusting seat 16 includes an adjusting cylinder seat 162 and an auxiliary lifting seat 161. An adjusting cylinder is housed within the adjusting cylinder seat 162, and the cylinder extension rod 165 of the adjusting cylinder moves vertically up and down. The adjusting cylinder seat 162 is coaxially connected to the motor shaft of the polishing motor 13 via a rotating seat 168, and is thus driven to rotate by the polishing motor 13. The polishing motor 13 and the adjusting seat 16 are located on the upper and lower sides of the main lifting seat 11, respectively.

[0033] The auxiliary lifting seat 161 is a U-shaped seat with an open top, and the adjusting cylinder seat 162 is fixed inside the U-shaped cavity. The bottom surface of the auxiliary lifting seat 161 is used to directly fix the polishing disc 17. To achieve relative sliding up and down, positioning slide rails 163 are arranged parallel to each other in the vertical direction on both side walls of the auxiliary lifting seat 161, and the positioning slide rails 163 are arranged at the four corners of the U-shaped cavity of the auxiliary lifting seat 161.

[0034] Lifting slides 164 are provided at the four corners of the outer side of the adjusting cylinder seat 162, corresponding to the vertical direction. The adjusting cylinder seat 162 and the positioning slide rail 163 form a vertical sliding engagement through the lifting slides 164. Two sets of lifting slides 164 connected on the same side are located between two sets of positioning slide rails 163. The two sets of positioning slide rails 163 on the side wall of the auxiliary lifting seat 161 clamp and position the corresponding two sets of lifting slides 164 on the adjusting cylinder seat 162, ensuring the guiding accuracy and stability of the movement. Rollers are provided on the positioning slide rail 163 along its length, and slide with the lifting slides 164 through the roller engagement, thereby reducing frictional resistance.

[0035] The drive end of the cylinder telescopic rod 165 is connected to a pressure sensor 167 fixed at the bottom of the U-shaped cavity of the auxiliary lifting seat 161. In this embodiment, the pressure sensor 167 is preferably a spoke-type pressure sensor. After the cylinder telescopic rod 165 is fixed to the center point of the pressure sensor 167, pressure is applied. The pressure is transmitted through the central part to the spokes around the pressure sensor 167. Strain gauges attached to the spokes are stretched or compressed along with the spokes, thereby sensing the downward pressure of the cylinder telescopic rod 165. The drive end of the cylinder telescopic rod 165 and the pressure sensor 167 are locked and positioned by a locking nut 166. By controlling the extension and retraction of the cylinder telescopic rod 165, a vertical tension or pressure can be applied to the pressure sensor 167. The feedback from the pressure sensor 167 can detect the pressure acting on the polishing disc 17 in real time, so that the polishing disc can reach the optimal preset pressure.

[0036] A first lower grinding disc 4 and a second lower grinding disc 6 can be selectively arranged on the lower grinding disc base 2. The first lower grinding disc 4 and the second lower grinding disc 6 are parallel embodiments, and will be described separately below.

[0037] In the first embodiment, a first lower grinding disc 4 is provided on the lower grinding disc base 2, such as... Figure 4 and Figure 5As shown: The first lower grinding disc 4 includes an annular guide rail 41 fixed on the lower grinding disc base 2 and a first annular rack 43 coaxially arranged with the annular guide rail 41. The annular guide rail 41 is coaxially arranged on the outer ring of the first annular rack 43, and both are fixed components. The mounting base 42 is slidably mounted on the annular guide rail 41 through two sets of symmetrically arranged guide blocks 425 on the left and right sides. Each bearing station 5 is fixed on the mounting base 42. Each mounting base 42 is equipped with a base motor 421, which avoids the position of the bearing station 5. A base drive gear 422 is coaxially fixed on the motor shaft of the base motor 421, and the base drive gear 422 and the first annular rack 43 form a gear and rack transmission. When the base motor 421 is working, it drives the base drive gear 422 to form a gear and rack transmission along the first annular rack 43, thereby driving the entire mounting base 42 and its supporting platform 53 to move along the annular guide rail 41, realizing the conversion of the work position. It is positioned by the guide block 425 to ensure that each mounting base 42 moves around the annular guide rail 41.

[0038] After each bearing station 5 completes its position change, a mounting base positioning assembly 44 is provided on the lower grinding disc seat 2 to achieve precise positioning of the mounting base 42. The mounting base positioning assemblies 44 are evenly spaced around the annular guide rail 41, and their number matches the number of mounting bases 42. On each mounting base 42, a base positioning groove 423 is radially formed along the annular guide rail 41. The mounting base positioning assembly 44 includes a telescopic cylinder 441 that rotates with the lower grinding disc seat 2. A swing rod fixing seat 443 is installed on the outer ring of the annular guide rail 41, and the swing rod fixing seat 443 avoids the running trajectory position of the mounting base 42.

[0039] The swing arm 442 is rotatably engaged with the swing arm mounting base 443, and the rotation axes of both the swing arm 442 and the telescopic cylinder 441 are set to be parallel to the tangents of the annular guide rail 41. The telescopic end of the telescopic cylinder 441 is connected to one end of the swing arm 442, driving the swing arm 442 to produce a swinging motion. When the telescopic cylinder 441 extends, the end of the swing arm 442 engages in the base positioning groove 423 of the mounting base 42; when the telescopic cylinder 441 retracts, the swing arm 442 exits from the base positioning groove 423. The telescopic movement of the telescopic cylinder 441 enables locking and unlocking of each mounting base 42, ensuring the stability of the polishing process.

[0040] To achieve rapid engagement, the base positioning groove 423 is designed as a wedge-shaped structure with a gradually narrowing diameter from the opening to the bottom. Simultaneously, a positioning wheel 4421 is provided at the engaging end of the swing rod 442. When the swing rod 442 swings close to the base positioning groove 423, the positioning wheel 4421 can roll along the groove surface of the base positioning groove 423, serving as a guide and ultimately achieving a tight engagement and positioning.

[0041] In the second embodiment, a second lower grinding disc 6 is provided on the lower grinding disc base 2, and its structure is as follows: Figures 6-8 As shown: The second lower grinding disc 6 includes a second annular rack 66, a main drive gear 67, and a rotary disc 61. The main drive gear 67 is located outside the second annular rack 66, with the rack of the second annular rack 66 located on its outer ring. The main drive gear 67 and the second annular rack 66 form a rack and pinion mesh. The main drive gear 67 is driven to rotate by a main drive gear motor 671. When the main drive gear 67 rotates, it drives the second annular rack 66 to rotate around its own axis. The rotary disc 61 is fixedly mounted on the second annular rack 66 and rotates synchronously with the second annular rack 66. A bearing plate 63 is positioned on the rotary disc 61 via a support frame and bearing bracket. The bearing plate 63 is arranged parallel to the rotary disc 61. Each bearing station 5 is fixed on the bearing plate 63 and rotates synchronously with the bearing plate 63. The bearing plate 63 and the rotary disc 61 enclose a motor cavity for mounting the motor base 62 and other drive components.

[0042] To achieve positioning of the rotary table 61, a rotary table positioning assembly 64 is installed on the lower grinding disc base 2. The rotary table positioning assembly 64 is evenly spaced around the circumference of the rotary table 61. Multiple rotary table positioning slots 611 are evenly spaced axially on the outer ring of the rotary table 61, and the number of rotary table positioning slots 611 corresponds to the number of rotary table positioning assemblies 64 and the number of bearing stations 5. The rotary table positioning assembly 64 is configured to engage and lock with the rotary table positioning slots 611 or disengage and unlock.

[0043] The rotary table positioning groove 611 is preferably an arc-shaped groove. The rotary table positioning assembly 64 includes a cylinder guide rail 641 fixed on the lower grinding disc seat 2, which is arranged radially along the second annular rack 66. The cylinder body of the linear cylinder 642 is fixed on the cylinder guide rail 641, and its telescopic end can telescopically travel along the cylinder guide rail 641. A positioning bearing 643 is installed on the telescopic end of the linear cylinder 642, and the axis of the positioning bearing 643 is parallel to the axis of the rotary table 61. When the linear cylinder 642 extends, it drives the positioning bearing 643 into the rotary table positioning groove 611 and engages with it. By rolling the positioning bearing 643 into the positioning groove 611 and positioning it, contact wear can be reduced and alignment can be achieved quickly. When the linear cylinder 642 retracts, the positioning bearing 643 exits from the rotary table positioning groove 611 and is released from locking.

[0044] On the lower grinding disc base 2, a bearing station positioning assembly 65 is also provided for positioning the bearing stations 5 on the loading side. Each bearing station 5 is provided with a positioning seat 7. The bearing station positioning assembly 65 includes a first positioning seat 651 and a second positioning seat 652. A positioning cylinder 653 is fixed on the first positioning seat 651, and a swing block 654 is fixed on the second positioning seat 652. The positioning cylinder 653 and the swing block 654 are respectively rotatably engaged with the first positioning seat 651 and the second positioning seat 652, and the axes of rotation are both set to be parallel to the tangent of the annular guide rail 41. The driving end of the positioning cylinder 653 is connected to one end of the swing block 654, driving the swing block 654 to rotate.

[0045] The swing block 654 includes a rotating arm 6541 and a positioning cylinder 6542 fixed to the end of the rotating arm 6541. The rotating arm 6541 and the positioning cylinder 6542 are arranged in an L-shape. One end of the rotating arm 6541 is rotatably engaged with the second positioning seat 652, and the other end of the rotating arm 6541 is rotatably engaged with the drive end of the positioning cylinder 653. An arc-shaped positioning groove 71 is provided on the positioning seat 7. When the positioning cylinder 653 is activated, it drives the swing block 654 to rotate, causing the positioning cylinder 6542 to engage with or disengage from the positioning groove 71 of the positioning seat 7, thereby achieving auxiliary positioning of the bearing station 5 at the loading station.

[0046] The second annular rack 66 and the outer ring of the main drive gear 67 are enclosed by a sealing baffle 68 to form a sealed space, which can be lubricated by adding lubricating oil into the sealed space.

[0047] The bearing stations 5 on the first lower grinding disc 4 and the second lower grinding disc 6 have the same structure, and each bearing station includes a bearing base 54. The bearing drive gear 51 is mounted in the bearing base 54 via bearings and is connected to the main drive motor 424, rotating under its drive. Multiple bearing platforms 53 are evenly arranged circumferentially around the bearing drive gear 51. Each bearing platform 53 has a drive shaft along its axial direction, and a bearing driven gear 52 is coaxially mounted at the lower end of the drive shaft. Each bearing driven gear 52 meshes with the central bearing drive gear 51. When the main drive motor drives the bearing drive gear 51 to rotate, it synchronously drives all the bearing driven gears 52, their bearing platforms 53, and the workpieces on the bearing platforms 53 to rotate together, achieving workpiece rotation during the polishing process.

[0048] With the number of bearing platforms 53 being N, the preferred tooth ratio of the bearing drive gear 51 to the bearing driven gear 52 is N:1. In this application, the number of bearing platforms 53 is 3, and the tooth ratio of the bearing drive gear 51 to the bearing driven gear 52 is 3:1. When the bearing drive gear 51 rotates 120 degrees, the bearing platform 53 drives the workpiece to rotate exactly 360 degrees to return to its original position. In this application, the upper grinding disc base 1 is provided with three sets of polishing discs 17, corresponding to three polishing stations. The first lower grinding disc 4 and the second lower grinding disc 6 are each provided with four sets of bearing stations 5, one of which is a loading station, and the other four bearing stations 5 are polishing stations, which are arranged relative to the corresponding polishing discs 17 on the upper grinding disc base 1 during operation.

[0049] During operation, the workpiece is placed on the support platform 53. After the first lower grinding disc 4 or the second lower grinding disc 6 rotates, the support station 5 at the loading point is rotated to the polishing station. The lifting cylinder 12 of the upper grinding disc seat 1 drives the main lifting seat 11 and all adjusting seats 16 and polishing disc 17 to descend and approach the workpiece. Subsequently, each adjusting seat 16 works independently, and its cylinder extension rod 165 applies pressure to the auxiliary lifting seat 161 and polishing disc 17 according to the set pressure value. The pressure sensor 167 monitors and feeds back the pressure signal in real time, so that the polishing disc 17 applies the set pressure to the workpiece. At the same time, the polishing motor 13 drives the polishing disc 17 to rotate, and the support platform 53 also drives the workpiece to rotate, completing the polishing process. During the processing, the positioning of each positioning component ensures the stable operation of the polishing process. After single-sided polishing is completed, the workpiece is flipped at the loading station, and the above steps are repeated to complete the double-sided polishing process.

[0050] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0051] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

Claims

1. A high-stability lower grinding disc mechanism for polishing, characterized in that, The first lower grinding disc (4) includes an annular guide rail (41) fixed on the lower grinding disc seat (2) and a first annular rack (43) coaxially arranged with the annular guide rail (41). The mounting base (42) for fixing the bearing position (5) is slidably mounted on the annular guide rail (41). Each mounting base (42) is evenly spaced on the annular guide rail (41). The mounting base (42) is provided with a base drive gear (422). The base drive gear (422) and the first annular rack (43) are engaged in gear and rack transmission, which drives the mounting base (42) to move along the annular guide rail (41).

2. The high-stability lower grinding disc mechanism for polishing according to claim 1, characterized in that, Each mounting base (42) has a base positioning groove (423) radially opened along the annular guide rail (41). The lower grinding disc base (2) is provided with a mounting base positioning assembly (44). The mounting base positioning assembly (44) includes a telescopic cylinder (441) that rotates with the lower grinding disc base (2). A swing rod fixing seat (443) is installed on the outer ring of the annular guide rail (41). The rod body of the swing rod (442) rotates with the swing rod fixing seat (443). The rotation axes of the swing rod (442) and the telescopic cylinder (441) are parallel to the tangent of the annular guide rail (41). After being driven by the telescopic cylinder (441), the swing rod (442) produces a swinging action to engage with or disengage from the base positioning groove (423).

3. The high-stability lower grinding disc mechanism for polishing according to claim 2, characterized in that, The diameter of the base positioning groove (423) narrows from the opening to the bottom of the groove. The locking end of the swing rod (442) and the base positioning groove (423) is provided with a positioning wheel (4421) that can roll along the base positioning groove (423). After being guided by the positioning wheel (4421), the swing rod (442) is locked and positioned with the base positioning groove (423).

4. The high-stability lower grinding disc mechanism for polishing according to claim 2, characterized in that, The mounting base positioning components (44) are arranged at uniform intervals around the annular guide rail (41), and the number of mounting base positioning components (44) matches the number of mounting bases (42).

5. A high-stability lower grinding disc mechanism for polishing according to any one of claims 1 to 4, characterized in that, A base motor (421) is mounted on the mounting base (42), and the base drive gear (422) is coaxially fixed on the motor shaft of the base motor (421).

6. A high-stability lower grinding disc mechanism for polishing according to any one of claims 1 to 4, characterized in that, Each mounting base (42) is provided with at least two sets of guide blocks (425), and the mounting base (42) slides with the annular guide rail (41) through each guide block (425).

7. A high-stability lower grinding disc mechanism for polishing according to any one of claims 1 to 4, characterized in that, The bearing station (5) includes a bearing seat (54) for fixing each bearing platform (53), a bearing drive gear (51) is arranged coaxially with the bearing seat (54) and is driven to rotate by the main drive motor (424); each bearing platform (53) is evenly arranged around the bearing drive gear (51) in the circumference, and a drive shaft is provided on each bearing platform (53) along the axial direction. A bearing driven gear (52) is coaxially provided on the drive shaft of each bearing platform (53), and each bearing driven gear (52) is driven to rotate by the bearing drive gear (51).

8. The high-stability lower grinding disc mechanism for polishing according to claim 7, characterized in that, With the number of bearing platforms (53) as N, the ratio of the number of teeth of the bearing drive gear (51) to the bearing driven gear (52) is N:1.

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