Millstone side-tipping prevention mechanism of crystal grinding and polishing machine

Abstract

The utility model relates to the technical field of equipment accessories of crystal grinding and polishing machines, and discloses a mechanism for preventing a grinding disc of a crystal grinding and polishing machine from rolling, which comprises a main shaft, a grinding disc arranged at the top of the main shaft and a lifting device arranged below the main shaft, the main shaft penetrates through a through hole on a working table plate, and a main shaft inner sleeve is sleeved on the outer side of the main shaft. An outer sleeve is arranged in a through hole of the working table plate, the main shaft rotates in a main shaft inner sleeve, the main shaft inner sleeve slides up and down in the outer sleeve, the lifting device is installed in a base at the bottom of the working table plate, a fixing plate is arranged at the top of the main shaft inner sleeve, and a plurality of guide columns are connected to the lower portion of the fixing plate. Positioning holes are formed in the positions, corresponding to the guide columns, of the top face of the workbench plate, guide sleeves are installed in the positioning holes, the guide columns penetrate through the corresponding guide sleeves, and the guide columns slide up and down in the guide sleeves. The mechanism for preventing the grinding disc from inclining laterally has the advantages that the main shaft rotates stably, the repeated positioning precision is high, and the grinding disc is not prone to inclining when being stressed on one side.

Description

Technical Field

[0001] The utility model relates to the technical field of crystal grinding and polishing machine equipment accessories, in particular to an anti-rolling mechanism for a grinding disc of a crystal grinding and polishing machine. Background Art

[0002] The crystal grinding and polishing machine is a mechanical device used to process and manufacture crystal materials. It achieves the effect of smoothing the crystal surface through fine grinding technology and chemical reaction of grinding fluid. When the crystal is gently touched by the clamping device and the grinding disc, the surface of the crystal will be finely ground as the grinding disc rotates to remove tiny flaws and uneven parts. The flat grinding disc and polishing disc of the crystal grinding and polishing machine are installed on the flange plane at the top of the spindle, located above the machine plate, and rotate and rise and fall with the spindle. Therefore, the more stable the spindle rotation, the less tilting of the single-sided force, the smaller the jitter, and the higher the grinding and polishing accuracy.

[0003] Patent application number CN201920616643.7 discloses a lifting mechanism of a crystal grinding and polishing machine, including: a lifting frame with a hollow interior, a servo motor, and a ball screw; a guide sleeve is fixedly mounted on the lifting frame, and a fixed guide rod is mounted inside the guide sleeve; a threaded sleeve is mounted at the bottom of the lifting frame; the top of the fixed guide rod is fixedly connected to the frame table, and the bottom end is fixedly connected to the top surface of the mounting frame; a servo motor is mounted on the bottom surface of the mounting frame; the servo motor is connected to a ball screw, corresponding to the threaded sleeve. A rotating main motor is fixedly mounted on the outer side of the lifting frame, and its output end is connected to a synchronous wheel through a synchronous belt. The rotating main motor rises and falls together with the lifting frame.

[0004] The purpose of the above patented technology is to ensure the stability of the lifting frame and prevent the grinding disc from shaking during lifting and polishing, but there are still some problems:

[0005] 1. The driving lifting frame lifts the spindle and the spindle sleeve assembly together. These components are all under the machine plate. The bottom of the spindle sleeve is connected to the lifting frame, and the top of the spindle sleeve has no support. When the spindle sleeve in a suspended state rises together with the spindle and the grinding disc, the rapidly rotating grinding disc will contact the crystal workpiece to perform grinding and polishing. Due to the large diameter and weight of the grinding and polishing disc, the high rotation speed, large centrifugal force and unilateral force, the grinding disc will tilt.

[0006] 2. The main motor that drives the spindle to rotate is fixed on the side of the lifting frame and rises and falls together with the lifting frame. The vibration generated by the main motor when it rotates will directly cause the lifting frame to vibrate, which will directly affect the spindle sleeve, spindle and grinding disc to vibrate together, which actually does not achieve the purpose of reducing the vibration of the grinding disc. The spindle grinding disc at the top is in an isolated state, and the vibration from the bottom of the spindle sleeve is transmitted to the grinding and polishing disc at the top and will be amplified.

[0007] 3. There is no support at the top of the main shaft grinding disc. When the grinding disc is subjected to unilateral force, the main shaft is unstable and the grinding disc is prone to tilt. Therefore, the utility model of the anti-tilting mechanism of the grinding disc can ensure that the grinding disc rotates smoothly, has small vibration, high repeated positioning accuracy, and the grinding disc is not easy to tilt when the grinding disc is subjected to unilateral force. Utility Model Content

[0008] 1. Technical issues to be resolved

[0009] In view of the shortcomings of the prior art such as the jitter caused by the main motor being directly installed on the side of the lifting frame inside the chassis, and the lack of support and instability on the top of the spindle grinding disc, the utility model provides an anti-grinding disc tilting mechanism for a crystal grinder and polisher, which has the advantages of stable spindle rotation and high repeated positioning accuracy, and solves the problem of difficult tilting when subjected to unilateral force. At the same time, the main motor is separated from the spindle lifting device and installed on the outer side of the chassis, which will cause less jitter to the spindle assembly.

[0010] (II) Technical solution

[0011] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0012] An anti-wear disc rollover mechanism for a crystal grinding and polishing machine comprises a spindle, a grinding disc mounted on the top of the spindle and a lifting device mounted below the spindle, the spindle passes through a through hole on a worktable, a spindle inner sleeve is sleeved on the outer side of the spindle, an outer sleeve is arranged in the through hole of the worktable, the spindle rotates in the spindle inner sleeve, the spindle inner sleeve slides up and down in the outer sleeve, the lifting device is mounted in a base at the bottom of the worktable, a fixing plate is arranged on the top of the spindle inner sleeve, a plurality of guide posts are connected below the fixing plate, a positioning hole is arranged on the top surface of the worktable at a position corresponding to the guide post, a guide sleeve is installed in the positioning hole, each guide post passes through a corresponding guide sleeve, and the guide post slides up and down in the guide sleeve;

[0013] A plurality of lifting screws are also connected to the bottom of the fixed plate or the side of the inner sleeve of the main shaft, and the bottom of each lifting screw is connected to the lifting movable plate. A ball screw nut is arranged at the through hole in the middle of the lifting movable plate, and a ball screw passes through the ball screw nut. The ball screw nut and the ball screw are provided with mutually meshing threads, and the bottom of the ball screw is connected to motor No. 1.

[0014] Preferably, a plurality of circumferentially arranged limiting balls are provided in the guide sleeve, half of each limiting ball is stuck in the guide sleeve groove in the guide sleeve and rotates, and the other half of the limiting ball is stuck in the guide post groove on the guide post and slides up and down, and a narrow groove with a space gradually decreasing from top to bottom is provided at the bottom of the guide post groove.

[0015] Preferably, the guide sleeve groove clamps the limiting ball in a fixed position for rotation, and the guide sleeve groove limits the movement of the limiting ball in the vertical and horizontal directions.

[0016] Preferably, the limiting ball slides up and down in the guide column groove, and the guide column groove limits the movement of the limiting ball in the horizontal direction.

[0017] Preferably, the guide sleeve groove is arranged at the top of the guide sleeve, and a cover plate is also installed on the top of the guide sleeve. The cover plate is detachably fixed on the top of the guide sleeve to facilitate the installation of the limiting ball.

[0018] Preferably, the lifting movable plate is also provided with a plurality of through holes, and a guide rail sleeve is provided in each through hole of the lifting movable plate, the inner hole of each guide rail sleeve is sleeved on the corresponding fixed column, the fixed column is vertically installed in the base, the upper end of the fixed column is fixed on the lower surface of the worktable, and the lifting movable plate slides on the fixed column.

[0019] Preferably, a motor seat sleeve is provided on the top of the No. 1 motor, and the connection between the ball screw and the output shaft of the No. 1 motor is located in the motor seat sleeve. The connection between the ball screw and the output shaft of the No. 1 motor is connected by a coupling for transmission. A lifting and fixing plate is also provided above the motor seat sleeve, and a through hole is provided in the lifting and fixing plate corresponding to the position of the ball screw. A screw bearing sleeved on the outside of the ball screw is provided at the through hole of the lifting and fixing plate, and the lower end of the fixing column is connected and fixed to the lifting and fixing plate.

[0020] Preferably, the bottom of the outer sleeve is connected to a transmission device, and the transmission device is fixed to the bottom of the main shaft by a spline. The transmission device is driven to rotate by the No. 2 motor, and the No. 2 motor is arranged on the outside of the work table. Arranging the No. 2 motor on the outside of the work table can avoid the vibration generated by the No. 2 motor during operation affecting the stability of the main shaft.

[0021] Preferably, bearings are provided at both upper and lower ends between the spindle inner sleeve and the spindle, so as to improve the fit between the spindle and the spindle inner sleeve while reducing the influence of the spindle rotation on the stability of the spindle inner sleeve.

[0022] Preferably, the guide column and the fixing plate are detachably connected via bolts.

[0023] Preferably, a second main motor is installed on the outside of the base, and its output end is connected to the transmission device through a V-belt.

[0024] Preferably, the guide post on the fixed plate is fixedly connected to the fixed plate via a cone sleeve, which facilitates removal and replacement due to wear.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the utility model provides an anti-wear disc tilting mechanism for a crystal grinding and polishing machine, which has the following beneficial effects:

[0027] 1. The anti-rolling mechanism of the grinding disc of the crystal grinding and polishing machine is equipped with a fixed plate on the inner sleeve of the main shaft which rises and falls synchronously with the grinding disc. A plurality of guide pillars are arranged at the bottom of the fixed plate which are slidably connected with the guide sleeve above the worktable, so as to provide a tight sliding guide and unilateral force support for the lifting of the grinding disc, so as to protect the stability and repeated positioning accuracy of the grinding disc and ensure the quality of the grinding and polishing process.

[0028] 2. The anti-tilting mechanism of the grinding disc of the crystal grinding and polishing machine has a precise match between the inner sleeve of the spindle and the inner hole of the outer sleeve. When the spindle is lifted and slid up and down, the outer sleeve also supports and guides the inner sleeve of the spindle. The double support and guidance protect the lifting stability and repeated positioning accuracy of the grinding disc, ensuring that the grinding disc is not easy to tilt when subjected to force on one side during grinding, thereby improving the quality of grinding and polishing.

[0029] 3. The anti-rolling mechanism of the grinding disc of the crystal grinder and polisher is achieved by arranging multiple circumferentially evenly distributed limit balls in the guide sleeve. Half of the limit balls are stuck in the guide column groove on the guide column and slide. When the guide column rises, the limit balls slide into the narrow groove at the bottom of the guide column groove. As the narrow groove gradually becomes smaller, the fit between the limit balls and the guide column is gradually improved, thereby improving the stability of the grinding disc after rising.

[0030] 4. The anti-tilting mechanism of the grinding disc of the crystal grinding and polishing machine is to set a guide post groove on the guide post. When the guide post is inserted into the inner hole of the guide sleeve, the inside of the guide sleeve is connected with the outside world to avoid the different pressures at the bottom of the guide post in various directions causing the grinding disc to tilt.

[0031] 5. When installing the guide column of the anti-wear disc tilting mechanism of the crystal grinder and polisher, first put the cover plate on the guide column, then insert the end of the guide column into the inner hole of the guide sleeve. After inserting to a certain depth, place the limit ball in the groove formed by the guide sleeve groove and the guide column groove, and then fix the cover plate on the top of the guide sleeve to complete the installation. After the installation is completed, the guide column is not easy to detach from the guide sleeve under the restriction of the limit ball, and the operation is simple and the stability is strong.

[0032] 6. The anti-tilting mechanism of the grinding disc of the crystal grinding and polishing machine is that the No. 2 main motor is not installed on the lifting frame, but on the outside of the base, which effectively reduces the shaking of the lifting device and the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The figure is a schematic diagram of the overall structure of the anti-wear disc tilting mechanism of the crystal grinding and polishing machine according to the first embodiment of the utility model.

[0034] Figure 2 It is a cross-sectional view of the anti-wear disc tilting mechanism of the crystal grinding and polishing machine according to the first embodiment of the utility model.

[0035] Figure 3 It is a structural schematic diagram of the cooperation between the guide column and the guide sleeve of the anti-rolling mechanism of the grinding disc of the crystal grinding and polishing machine in the second embodiment of the utility model.

[0036] Figure 4 This is a cross-sectional view of the cooperation between the guide sleeve and the guide column of the anti-rolling mechanism of the grinding disc of the crystal grinding and polishing machine in the second embodiment of the utility model.

[0037] Figure 5 It is a cross-sectional view of the anti-wear disc tilting mechanism of the crystal grinding and polishing machine according to the third embodiment of the utility model.

[0038] Figure 6 This is a schematic diagram of the structure after the lifting screw and the main shaft inner sleeve are connected in Example 3 of the utility model.

[0039] In the figure: 1. spindle; 2. spindle inner sleeve; 3. outer sleeve; 4. worktable; 5. fixed column; 6. lifting screw; 7. lifting movable plate; 8. guide rail sleeve; 9. lifting fixed plate; 10. motor seat sleeve; 11. No. 1 motor; 12. coupling; 13. taper sleeve; 14. screw bearing; 15. ball screw nut; 16. ball screw; 17. base; 18. guide sleeve; 19. guide column; 20. limit ball; 21. grinding disc; 22. crystal frame; 23. No. 2 motor; 181. cover plate; 182. guide sleeve groove; 191. guide column groove; 201. fixed plate; 192. narrow groove. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] Embodiment 1:

[0044] This embodiment provides an anti-grinding disc tilting mechanism for a crystal grinding and polishing machine, which has the following technical features.

[0045] See also Figure 1-2 , an anti-wear disc rollover mechanism of a crystal grinding and polishing machine, comprising a spindle 1, a grinding disc 21 installed on the top of the spindle 1 and a lifting device installed below the spindle 1, a crystal rack 22 is also installed on the spindle 1, the crystal rack 22 is used to fix the crystal above the grinding disc 21 for grinding, the spindle 1 passes through the through hole on the workbench 4, the outer side of the spindle 1 is sleeved with a spindle inner sleeve 2, an outer sleeve 3 is arranged in the through hole of the workbench 4, the spindle 1 rotates in the spindle inner sleeve 2, and the spindle inner sleeve 2 slides up and down in the outer sleeve 3, the lifting device is installed in the base 17 at the bottom of the workbench 4, a fixing plate 201 is arranged on the top of the spindle inner sleeve 2, and a plurality of guide pillars 19 are connected below the fixing plate 201, and a positioning hole is arranged on the top surface of the workbench 4 at the position corresponding to the guide pillar 19, a guide sleeve 18 is installed in the positioning hole, each guide pillar 19 passes through the corresponding guide sleeve 18, and the guide pillar 19 slides up and down in the guide sleeve 18.

[0046] Through the above technical solution, a plurality of guide pillars 19 are arranged at the bottom of the spindle inner sleeve 2 which rises and falls synchronously with the grinding disc 21 and are slidably connected to the guide sleeve 18 above the worktable 4, so as to provide a tight sliding guide and unilateral force support for the grinding disc 21, so as to protect the stability and repeatable positioning accuracy of the grinding disc 21 and ensure the quality of the grinding and polishing process.

[0047] Further settings, such as Figure 1-2 As shown, the lifting device includes a lifting screw 6, the bottom of each lifting screw 6 is connected to the lifting movable plate 7, the top of the lifting screw 6 is connected to the bottom of the fixed plate 201, and the lifting movable plate 7 is provided with a ball screw nut 15 at the middle through hole, and the ball screw 16 passes through the ball screw nut 15. The ball screw nut 15 and the ball screw 16 are provided with mutually meshing threads, and the bottom of the ball screw 16 is connected to the No. 1 motor 11.

[0048] Specifically, the ball screw 16 is driven to rotate by the No. 1 motor 11, and the ball screw 16 and the ball screw nut 15 form a spiral pair. The rotation of the ball screw 16 causes the ball screw nut 15 to rise and fall, that is, the lifting movable plate 7 is lifted and lowered, and the lifting movable plate 7 drives the lifting screw 6 to rise and fall. The lifting screw 6 is connected to the main shaft inner sleeve 2, and the main shaft inner sleeve 2 is sleeved on the outside of the main shaft 1, fixed to the main shaft 1 in the vertical direction, and connected to the rotation in the horizontal direction. Therefore, the lifting of the main shaft inner sleeve 2 drives the main shaft 1 to rise and fall, and also drives the grinding disk 21 at the top of the main shaft 1 to rise and fall.

[0049] Further settings, such as Figure 1-2As shown, a plurality of through holes are also provided on the lifting movable plate 7, and a guide rail sleeve 8 is provided in each through hole of the lifting movable plate 7. The inner hole of each guide rail sleeve 8 is sleeved on the corresponding fixed column 5, and the fixed column 5 is vertically installed in the base 17. The upper end of the fixed column 5 is fastened to the threaded hole on the lower plane of the workbench 4, and the lifting movable plate 7 is sleeved on the fixed column 5 and slides.

[0050] Specifically, when the number of the fixing columns 5 is two, the fixing columns 5 pass through two symmetrical holes at the upper edge of the lifting movable plate 7 . When the number of the fixing columns 5 is greater than or equal to two, the fixing columns 5 are evenly distributed around the edge of the lifting movable plate 7 .

[0051] Further settings, such as Figure 1-2 As shown, a motor seat sleeve 10 is provided on the top of the No. 1 motor 11, and the connection between the ball screw 16 and the output shaft of the No. 1 motor 11 is located in the motor seat sleeve 10. The connection between the ball screw 16 and the output shaft of the No. 1 motor 11 is connected by a coupling 12. The coupling 12 connects the ball screw 16 and the output shaft of the No. 1 motor 11 together, so that when the output shaft of the No. 1 motor 11 rotates, the ball screw 16 is driven to rotate. A lifting and fixing plate 9 is also provided above the motor seat sleeve 10. The lifting and fixing plate 9 is provided with a through hole corresponding to the position of the ball screw 16. A screw bearing 14 sleeved on the outside of the ball screw 16 is provided at the through hole of the lifting and fixing plate 9, and the lower end of the fixing column 5 is connected and fixed to the lifting and fixing plate 9.

[0052] Specifically, the bottom end of the fixed column 5 is fixed to the lifting fixed plate 9 by bolts, and the bottom end of the lifting screw 6 is fixed to the lifting movable plate 7 by bolts. Multiple fixed columns 5 are evenly distributed on the lifting fixed plate 9, and multiple lifting screws 6 are also evenly distributed on the lifting movable plate 7.

[0053] Specifically, when the bottom end of the fixing column 5 is fixed on the lifting fixing plate 9, the top end of the fixing column 5 is fixed on the bottom of the workbench 4, and the fixing column 5 and the workbench 4 can be fixed by bolts or welding.

[0054] Further, the second motor 23 is arranged outside the work table 4, and drives the main shaft 1 to rotate through a chain or a belt. Arranging the second motor 23 outside the work table 4 can prevent the vibration generated when the second motor 23 is running from affecting the stability of the main shaft 1.

[0055] Further settings, such as Figure 1-2 As shown, the bottom of the outer sleeve 3 is connected to the transmission device, and the transmission device is connected to the bottom of the main shaft 1 through a spline transmission, so that when the transmission device rotates, the main shaft 1 is driven to rotate. The transmission device is driven to rotate by the second motor 23, thereby driving the grinding disc 21 to rotate.

[0056] Specifically, the transmission between the second motor 23 and the transmission device is one of gear transmission, belt transmission, chain transmission or worm transmission. Since a ball screw 16 is provided at the bottom of the main shaft 1, the second motor 23 needs to be installed on the side of the main shaft 1, such as Figure 1 As shown, the main shaft 1 is installed on the outside of the base 17 and is driven to rotate by a belt drive.

[0057] Further settings, such as Figure 1-2 As shown, bearings are provided at both upper and lower ends between the spindle inner sleeve 2 and the spindle 1, which improves the fit between the spindle 1 and the spindle inner sleeve 2 while reducing the influence of the rotation of the spindle 1 on the stability of the spindle inner sleeve 2.

[0058] Embodiment 2:

[0059] Please refer to Figure 1-4 A grinding disc anti-tilting mechanism for a crystal grinding and polishing machine comprises a spindle 1, a grinding disc 21 mounted on the top of the spindle 1 and a lifting device mounted below the spindle 1, the spindle 1 passes through a through hole on a workbench 4, a spindle inner sleeve 2 is sleeved on the outer side of the spindle 1, an outer sleeve 3 is arranged in the through hole of the workbench 4, the spindle 1 rotates in the spindle inner sleeve 2, the spindle inner sleeve 2 slides up and down in the outer sleeve 3, the lifting device is mounted in a base 17 at the bottom of the workbench 4, a fixing plate 201 is arranged on the top of the spindle inner sleeve 2, a plurality of guide pillars 19 are connected below the fixing plate 201, a positioning hole is arranged on the top surface of the workbench 4 at a position corresponding to the guide pillar 19, a guide sleeve 18 is installed in the positioning hole, each guide pillar 19 passes through the corresponding guide sleeve 18, and the guide pillar 19 is moved upward in the guide sleeve 18 Sliding down, the guide sleeve 18 is also provided with a plurality of limit balls 20 arranged in a circle, half of each limit ball 20 is stuck in the guide sleeve groove 182 in the guide sleeve 18 and rotates, and the other half of the limit ball 20 is stuck in the guide column groove 191 on the guide column 19 and slides up and down, and the bottom of the guide column groove 191 is provided with a narrow groove 192 with a space gradually decreasing from top to bottom; a plurality of lifting screws 6 are also connected to the bottom of the fixed plate 201, and each lifting screw 6 passes through the workbench 4 and is connected to the lifting movable plate 7, and the lifting movable plate 7 is provided with a ball screw nut 15 at the middle through hole, and the ball screw nut 15 passes through the ball screw 16, and the ball screw nut 15 and the ball screw 16 are provided with mutually meshing threads, and the bottom of the ball screw 16 is connected to the No. 1 motor 11.

[0060] Through the above technical solution, as the grinding disc 21 rises, the part of the guide post 19 stuck in the guide sleeve 18 will become smaller and smaller, and the stability will also decrease. Therefore, a plurality of circumferentially evenly distributed limiting balls 20 are arranged in the guide sleeve 18, and half of the limiting balls 20 are stuck in the guide post groove 191 on the guide post 19 and slide. When the guide post 19 rises, the limiting balls 20 slide into the narrow groove 192 at the bottom of the guide post groove 191. Since the narrow groove 192 gradually becomes smaller, the fit between the limiting balls 20 and the guide post 19 is gradually improved, thereby improving the stability of the grinding disc 21 after rising.

[0061] At the same time, a guide post groove 191 is provided on the guide post 19. When the guide post 19 is inserted into the inner hole of the guide sleeve 18, the inside of the guide sleeve 18 is connected with the outside to avoid the grinding disc 21 being tilted due to different pressures at the bottom of the guide post 19 in various directions.

[0062] Further settings, such as Figure 3-4 As shown, the guide sleeve groove 182 holds the limiting ball 20 in a fixed position for rotation, and the guide sleeve groove 182 limits the movement of the limiting ball 20 in the vertical and horizontal directions.

[0063] Specifically, fixing the position of the limit ball 20 is to prevent the position of multiple limit balls 20 from shifting due to different force directions. The shift will cause the gap between each surface of the guide column 19 and the guide sleeve 18 to change, causing the grinding disk 21 to tilt. Therefore, the limit ball 20 should be fixed in one position both horizontally and vertically, and the multiple limit balls 20 should be evenly distributed on the outside of the guide column 19.

[0064] Further settings, such as Figure 3-4 As shown, the limiting ball 20 slides up and down in the guide column groove 191, and the guide column groove 191 limits the movement of the limiting ball 20 in the horizontal direction.

[0065] Further settings, such as Figure 3-4 As shown, the guide sleeve groove 182 is arranged on the top of the guide sleeve 18 , and a cover plate 181 is also installed on the top of the guide sleeve 18 . The cover plate 181 is detachably fixed on the top of the guide sleeve 18 to facilitate the installation of the limiting ball 20 .

[0066] Specifically, the cover plate 181 is made of soft rubber material at the position corresponding to the guide post 19 to improve the fit with the guide post 19 .

[0067] Specifically, the cover plate 181 is fixed to the top of the guide sleeve 18 by bolts.

[0068] Specifically, when installing the guide column 19, first put the cover plate 181 on the guide column 19, then insert the end of the guide column 19 into the inner hole of the guide sleeve 18. After inserting to a certain depth, place the limiting ball 20 in the groove formed by the guide sleeve groove 182 and the guide column groove 191, and then fix the cover plate 181 on the top of the guide sleeve 18 to complete the installation.

[0069] Embodiment three:

[0070] Please refer to Figure 5-6 , an anti-wear disc rollover mechanism of a crystal grinding and polishing machine, comprising a spindle 1, a grinding disc 21 installed on the top of the spindle 1 and a lifting device installed under the spindle 1, a crystal rack 22 is also installed on the spindle 1, the crystal rack 22 is used to fix the crystal above the grinding disc 21 for grinding, the spindle 1 passes through the through hole on the workbench 4, the spindle inner sleeve 2 is sleeved on the outside of the spindle 1, an outer sleeve 3 is arranged in the through hole of the workbench 4, the spindle 1 rotates in the spindle inner sleeve 2, the spindle inner sleeve 2 slides up and down in the outer sleeve 3, the lifting device is installed in the base 17 at the bottom of the workbench 4, the top of the spindle inner sleeve 2 is provided with a fixing plate 201, the fixing plate 2 01 is connected to multiple guide pillars 19 at the bottom, and the top surface of the workbench 4 is provided with positioning holes at the positions corresponding to the guide pillars 19, and a guide sleeve 18 is installed in the positioning holes, and each guide pillar 19 passes through the corresponding guide sleeve 18, and the guide pillar 19 slides up and down in the guide sleeve 18; the lifting device includes multiple lifting screws 6 connected to the side of the spindle inner sleeve 2, and each lifting screw 6 is on the lifting movable plate 7 below, and the lifting movable plate 7 is provided with a ball screw nut 15 at the middle through hole, and the ball screw 16 passes through the ball screw nut 15, and the ball screw nut 15 and the ball screw 16 are provided with mutually meshing threads, and the bottom of the ball screw 16 is connected to the No. 1 motor 11.

[0071] The lifting device is further provided with a lifting screw 6, the bottom of each lifting screw 6 is connected to the lifting movable plate 7, the top of the lifting screw 6 is connected to the side of the main shaft inner sleeve 2 through a connecting block, and the lifting movable plate 7 is provided with a ball screw nut 15 at the middle through hole, and the ball screw nut 15 passes through the ball screw 16, and the ball screw nut 15 and the ball screw 16 are provided with mutually meshing threads, and the bottom of the ball screw 16 is connected to the No. 1 motor 11.

[0072] like Figure 6 As shown, the top of the lifting screw 6 is connected to the side of the main shaft inner sleeve 2 by bolts.

[0073] It is further provided that the guide column 19 and the fixing plate 201 are connected via a cone sleeve 13 for easy disassembly.

[0074] Working principle: Step 1, turn on the No. 2 motor 23, the No. 2 motor 23 drives the transmission device set at the bottom of the outer sleeve 3 to rotate, the transmission device drives the main shaft 1 to rotate, and the main shaft 1 drives the top grinding disk 21 to rotate; Step 2, start the No. 1 motor 11, the output shaft of the No. 1 motor 11 is connected to the ball screw 16 through the coupling 12, so the No. 1 motor 11 drives the ball screw 16 to rotate, the ball screw 16 and the ball screw nut 15 on the lifting movable plate 7 are a spiral pair, so when the ball screw 16 rotates, it will drive the lifting movable plate 7 to rise and fall, the lifting movable plate 7 is connected to the main shaft inner sleeve 2 through the lifting screw 6, the lifting movable plate 7 is lifted and lowered to drive the main shaft inner sleeve 2 to rise and fall, and the main shaft inner sleeve 2 and the main shaft 1 are fixed in the vertical direction. The inner sleeve 2 of the main shaft drives the main shaft 1 to rise and fall, and also drives the grinding disc 21 to rise and fall; when the grinding disc 21 rises to a certain height, since the guide post 19 at the bottom is gradually lifted from the guide sleeve 18, the part of the guide post 19 stuck in the guide sleeve 18 will become less and less, and the stability will also decrease. Therefore, a plurality of circumferentially evenly distributed limiting balls 20 are arranged in the guide sleeve 18, and half of the limiting balls 20 are stuck in the guide post groove 191 on the guide post 19 and slide. When the guide post 19 rises, the limiting balls 20 slide into the narrow groove 192 at the bottom of the guide post groove 191. Since the narrow groove 192 gradually becomes smaller, the fit between the limiting balls 20 and the guide post 19 is gradually improved, thereby improving the stability of the grinding disc 21 after rising.

[0075] To summarize, the anti-rolling mechanism of the grinding disc of the crystal grinding and polishing machine is a fixed plate 201 set on the spindle inner sleeve 2 which rises and falls synchronously with the grinding disc 21, and a plurality of guide pillars 19 are set at the bottom of the fixed plate 201 which are slidably connected with the guide sleeve 18 above the worktable 4, so as to provide a tight sliding guide and unilateral force support for the grinding disc 21, so as to protect the stability and repeated positioning accuracy of the grinding disc 21 and ensure the quality of the grinding and polishing process.

[0076] The anti-rolling mechanism of the grinding disc of the crystal grinding and polishing machine is achieved by arranging a plurality of circumferentially evenly distributed limiting balls 20 in the guide sleeve 18, half of the limiting balls 20 are stuck in the guide column groove 191 on the guide column 19 and slide. When the guide column 19 rises, the limiting balls 20 slide into the narrow groove 192 at the bottom of the guide column groove 191. As the narrow groove 192 gradually becomes smaller, the fit between the limiting balls 20 and the guide column 19 is gradually improved, thereby improving the stability of the grinding disc 21 after rising.

[0077] The anti-rollover mechanism of the grinding disc of the crystal grinding and polishing machine is to provide a guide post groove 191 on the guide post 19. When the guide post 19 is inserted into the inner hole of the guide sleeve 18, the inside of the guide sleeve 18 is connected with the outside world to avoid the grinding disc 21 from tilting due to different pressures at the bottom of the guide post 19 in various directions.

[0078] When installing the guide column 19 of the anti-wear disc tilting mechanism of the crystal grinding and polishing machine, the cover plate 181 is firstly put on the guide column 19, and then the end of the guide column 19 is inserted into the inner hole of the guide sleeve 18. After being inserted to a certain depth, the limiting ball 20 is placed in the groove formed by the guide sleeve groove 182 and the guide column groove 191, and then the cover plate 181 is fixed on the top of the guide sleeve 18 to complete the installation. After the installation is completed, the guide column 19 is not easy to be separated from the guide sleeve 18 under the restriction of the limiting ball 20, and the operation is simple and the stability is strong.

[0079] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-rolling mechanism for a crystal grinding and polishing machine, comprising a spindle (1), a grinding disc (21) mounted on the top of the spindle (1), and a lifting device mounted below the spindle (1), wherein the spindle (1) passes through a through hole on a worktable (4), a spindle inner sleeve (2) is sleeved on the outer side of the spindle (1), an outer sleeve (3) is arranged in the through hole of the worktable (4), the spindle (1) rotates in the spindle inner sleeve (2), and the spindle inner sleeve (2) slides up and down in the outer sleeve (3), and the lifting device is mounted in a base (17) at the bottom of the worktable (4), characterized in that: A fixing plate (201) is arranged on the top of the spindle inner sleeve (2), a plurality of guide pillars (19) are connected below the fixing plate (201), a positioning hole is arranged on the top surface of the worktable (4) at a position corresponding to the guide pillar (19), a guide sleeve (18) is installed in the positioning hole, each guide pillar (19) passes through the corresponding guide sleeve (18), and the guide pillar (19) slides up and down in the guide sleeve (18); A plurality of lifting screws (6) are also connected to the bottom of the fixed plate (201) or the side of the spindle inner sleeve (2), and the bottom of each lifting screw (6) is connected to the lifting movable plate (7). The lifting movable plate (7) is provided with a ball screw nut (15) at a middle through hole, and a ball screw (16) passes through the ball screw nut (15). The ball screw nut (15) and the ball screw (16) are provided with mutually meshing threads, and the bottom of the ball screw (16) is connected to the No. 1 motor (11).

2. The anti-rollover mechanism of a grinding disc of a crystal grinding and polishing machine according to claim 1, characterized in that: A plurality of limiting balls (20) arranged in a circle are also provided in the guide sleeve (18). Half of each limiting ball (20) is clamped in a guide sleeve groove (182) in the guide sleeve (18) and rotates, and the other half of the limiting ball (20) is clamped in a guide post groove (191) on the guide post (19) and slides up and down. A narrow groove (192) whose space gradually decreases from top to bottom is provided at the bottom of the guide post groove (191).

3. The anti-rolling mechanism of the grinding disc of the crystal grinding and polishing machine according to claim 2 is characterized in that: The guide sleeve groove (182) clamps the limiting ball (20) at a fixed position for rotation, and the guide sleeve groove (182) limits the movement of the limiting ball (20) in the vertical direction and the horizontal direction.

4. The anti-rollover mechanism of a grinding disc of a crystal grinding and polishing machine according to claim 3, characterized in that: The limiting ball (20) slides up and down in the guide column groove (191), and the guide column groove (191) limits the movement of the limiting ball (20) in the horizontal direction.

5. The anti-rollover mechanism of a grinding disc of a crystal grinding and polishing machine according to claim 4, characterized in that: The guide sleeve groove (182) is arranged on the top of the guide sleeve (18), and a cover plate (181) is also installed on the top of the guide sleeve (18), and the cover plate (181) is detachably fixed on the top of the guide sleeve (18).

6. The anti-rollover mechanism of a grinding disc of a crystal grinding and polishing machine according to claim 1, characterized in that: The lifting movable plate (7) is also provided with a plurality of through holes, each through hole of the lifting movable plate (7) is provided with a guide rail sleeve (8), the inner hole of each guide rail sleeve (8) is sleeved on a corresponding fixed column (5), the fixed column (5) is vertically installed in the base (17), the upper end of the fixed column (5) is fixed to the lower surface of the workbench (4), and the lifting movable plate (7) is sleeved on the fixed column (5) and slides.

7. The anti-rollover mechanism of a grinding disc of a crystal grinding and polishing machine according to claim 6, characterized in that: A motor seat (10) is arranged on the top of the No. 1 motor (11); a connection between the ball screw (16) and the output shaft of the No. 1 motor (11) is located inside the motor seat (10); the connection between the ball screw (16) and the output shaft of the No. 1 motor (11) is connected in transmission via a coupling (12); a lifting and fixing plate (9) is also arranged above the motor seat (10); a through hole is arranged on the lifting and fixing plate (9) at a position corresponding to the ball screw (16); a screw bearing (14) sleeved on the outside of the ball screw (16) is arranged at the through hole of the lifting and fixing plate (9); and a lower end of the fixing column (5) is connected and fixed to the lifting and fixing plate (9).

8. The anti-rollover mechanism of a grinding disc of a crystal grinding and polishing machine according to claim 1, characterized in that: The bottom of the outer sleeve (3) is connected to a transmission device, and the transmission device is fixed to the bottom of the main shaft (1) via a spline. The transmission device is driven to rotate by a No. 2 motor (23), and the No. 2 motor (23) is arranged on the outside of the workbench (4).

9. The anti-rollover mechanism of a grinding disc of a crystal grinding and polishing machine according to claim 1, characterized in that: Bearings are provided at both upper and lower ends between the main shaft inner sleeve (2) and the main shaft (1).

10. The anti-rollover mechanism of a grinding disc of a crystal grinding and polishing machine according to claim 1, characterized in that: The guide column (19) and the fixing plate (201) are detachably connected via bolts.

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