Multi-station sheet polishing machine

Abstract

The utility model provides a multi-station sheet polishing machine, which comprises a machine frame, and a lower main shaft assembly, a station turntable assembly and an upper main shaft assembly which are respectively arranged on the machine frame, the machine frame comprises a bottom frame assembly, more than three supporting upright posts are arranged on the bottom frame assembly, and a top cross frame is arranged at the top ends of the supporting upright posts; the bottom frame assembly, the supporting stand columns and the top transverse frame form a cage type whole, and the upper main shaft assembly is arranged on the supporting stand columns. The cage type integral structure formed by the scheme is stable in structure, the upper main shaft assembly can be conveniently arranged, and the situation that the machining precision is poor due to the fact that the upper main shaft assembly deforms can be prevented; and the lower main shaft assembly, the station turntable assembly and the upper main shaft assembly are reasonably matched and are mutually matched, so that the production efficiency of the whole machine is high, and the stability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding and polishing equipment, in particular to a multi-station sheet material polishing machine. Background Art

[0002] With the development of communication technology, smart phones have become more and more popular and are developing towards high quality. High quality includes not only the hardware configuration of the mobile phone, but also the appearance and texture. The current mainstream mobile phone main structure is an alloy middle frame plus a glass front screen and a glass back screen (or a glass cover). In order to enhance the visual effect of the screen and the body as a whole, and to enhance the feel, 2.5D screens are now widely used to replace 2D screens. 2.5D screens are a kind of curved screen, also known as water drop screens. 2.5D screens can make the surface of the mobile phone look like a water drop that is full but not overflowing, which has more visual tension and adds a lot to the visual expression of the mobile phone screen. In addition, the curved shape of the 2.5D screen is more in line with the principle of ergonomics. The curved transition eliminates the harsh edges and corners of the edge, greatly improving the feel of sliding the screen. However, the cost is also relatively increased, because during the processing, the glass grinding process will have a transition problem, so there will be a certain loss in the yield rate, resulting in an increase in cost. To solve these problems, people have thought of many ways to improve the quality and efficiency of glass polishing.

[0003] In the patent document with application number 202110562541.3, application publication number CN113246000 A, and application publication date 2021.08.13, an intelligent light sweeper is disclosed, including a frame and an upper disk mechanism and a lower disk mechanism respectively arranged on the frame, wherein the lower disk mechanism includes: a turntable assembly, including a turntable, a turntable shaft connected to the turntable at one end, and a turntable gear sleeved on the other end of the turntable shaft; multiple working disk assemblies, including a working disk arranged on the turntable, a working disk shaft connected to the working disk at one end, a connecting bearing sleeved on the other end of the working disk shaft, and a working disk gear sleeved on the connecting bearing and meshed with the turntable gear, and a plurality of connecting holes are provided on the working disk gear; a clutch assembly arranged at the material picking and unloading station; the upper disk mechanism includes: a plurality of polishing assemblies distributed at intervals, and the plurality of polishing assemblies are located above the workpiece disk. The scheme discloses setting up an upper plate mechanism and a lower plate mechanism, setting multiple working plate assemblies on the lower plate mechanism, and setting a polishing assembly on the upper plate assembly. This arrangement can effectively improve the efficiency of glass processing, but the scheme also has shortcomings. For example, the polishing assembly is set in a cantilever manner. Since the polishing assembly includes heavy components such as a motor and a reducer, the mounting frame will deform after a long period of use, causing the polishing assembly to deform, thereby affecting the processing accuracy; in addition, the rotation of the workpiece disk unit 326 is achieved by the meshing of the transmission gear 327 with the working plate gear 323. The transmission gear 327 and the working plate gear 323 are both external gears, and the meshing of external gears is not as stable as the meshing of external gears with internal gears; and the structural stability of the lower plate mechanism in the prior art needs to be further improved. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the utility model provides a multi-station sheet polishing machine. Through a new structural design, the problems of poor structural stability of the upper and lower disc mechanisms of the polishing machines in the prior art, poor stability of the working disc assembly, and easy deformation of the polishing assembly are solved.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is: a multi-station sheet polishing machine, including a frame and a lower spindle assembly, a station turntable assembly and an upper spindle assembly respectively arranged on the frame, the frame including a bottom frame assembly, more than three supporting columns are arranged on the bottom frame assembly, a top cross frame is arranged on the top of the supporting columns, the bottom frame assembly, the supporting columns and the top cross frame form a cage-type whole, and the upper spindle assembly is arranged on the top cross frame;

[0006] The upper spindle assembly comprises a main mounting frame arranged on the top cross frame, a lifting module is arranged on the main mounting frame, and a spindle bracket is arranged on the lifting module; a sub-mounting frame is also arranged on the spindle bracket, the sub-mounting frame comprises one or more auxiliary guide columns, a limit block is arranged on the top of the auxiliary guide column, an auxiliary guide sleeve is slidably arranged on the auxiliary guide column, and the auxiliary guide sleeve is arranged on the top cross frame;

[0007] The multi-station sheet polishing machine also includes an upper cover component for realizing closed processing and a grinding liquid circulation component for providing grinding liquid to the upper spindle component.

[0008] The cage-type overall structure formed by the above scheme has a stable structure, is convenient for the setting of the upper spindle assembly, and can prevent the upper spindle assembly from being deformed, resulting in poor processing accuracy; the lower spindle assembly, the workstation turntable assembly and the upper spindle assembly are reasonably matched, and the components cooperate with each other, so that the production efficiency of the whole machine is high and the stability is good.

[0009] Furthermore, the lower spindle assembly includes a support platform arranged on the bottom frame assembly, a central support flange is fixedly arranged on the support platform, a large workstation rotating flange is arranged inside the central support flange through a first bearing group; a large driving double gear is arranged on the top outer side of the central support flange through a second bearing; a third bearing group is also arranged between the large workstation rotating flange and the large driving double gear; a large workstation flange lower gear is arranged at the bottom end of the large workstation rotating flange;

[0010] The lower spindle assembly also includes a station drive assembly for driving the lower gear of the large station flange to rotate and a planetary drive assembly for driving the large driving double gear to rotate.

[0011] Furthermore, an air hole penetrating the large station rotating flange is opened at the center of the large station rotating flange, and a first rotating joint is provided at the bottom end of the air hole; the top end of the air hole is trumpet-shaped;

[0012] The station drive assembly includes a station drive reducer, and a station reducer gear is provided on the output shaft of the station drive reducer, and the station reducer gear is meshed with the gear under the large station flange;

[0013] The station drive assembly also includes a station drive motor for driving the input shaft of the station drive reducer to rotate;

[0014] The large drive duplex gear includes a driven drive gear at the bottom;

[0015] The planetary drive assembly includes a planetary drive reducer, on the output shaft of which a planetary power gear is provided, and the planetary power gear is meshed with a driven drive gear;

[0016] The planetary drive assembly further includes a planetary drive motor for driving the input shaft of the planetary drive reducer to rotate.

[0017] Furthermore, the station turntable assembly includes a station turntable arranged on a large station rotating flange, and more than two groups of station turntable assemblies are arranged on the station turntable. The station turntable assembly includes a large planetary fixed flange sleeve fixed on the station turntable; a station lower gear is arranged at the bottom of the large planetary fixed flange sleeve through a bearing; a small station rotating flange is arranged inside the large planetary fixed flange sleeve through a fourth bearing group, and a clutch turntable is arranged at the lower part of the small station rotating flange, the clutch turntable can slide along the axial direction of the small station rotating flange, and the small station rotating flange can be driven to rotate by the clutch turntable;

[0018] A connecting piece for transmitting power is also provided between the clutch rotating disc and the lower gear of the station, and an elastic component for making the clutch rotating disc abut against the lower gear of the station under normal conditions is also provided at the lower part of the rotating flange of the small station;

[0019] A small planetary wheel fixing plate is provided on the upper part of the small station rotating flange, and more than one small turntable assembly of the station is provided on the small planetary wheel fixing plate, and the distance between the rotation center of each small turntable assembly of the station and the rotation center of the small planetary wheel fixing plate is equal;

[0020] The workstation turntable assembly also includes a workstation turntable rotation driving device for driving the workstation turntable to rotate.

[0021] Furthermore, an air hole penetrating the small-station rotating flange is provided in the small-station rotating flange, and a second rotating joint is provided at the bottom end of the air hole;

[0022] The station turntable rotation driving device comprises a station small planetary gear fixedly connected to the planetary rotating flange; a station inner gear ring is fixedly arranged on the station large turntable through a support rod, and the station small planetary gear is meshed with the station inner gear ring.

[0023] Further, the upper spindle assembly includes a main mounting frame arranged on the top cross frame, a lifting module is arranged on the main mounting frame, a spindle bracket is arranged on the lifting module, a spindle drive device is arranged on the spindle bracket, and the spindle drive device includes a reducer, characterized in that: a sub-mounting frame is also arranged on the spindle bracket, the sub-mounting frame includes more than one auxiliary guide column, a limit block is arranged at the top end of the auxiliary guide column, and an auxiliary guide sleeve is slidably arranged on the auxiliary guide column;

[0024] A spindle bearing sleeve coaxial with the output end of the reducer is provided at the bottom of the spindle bracket, a spindle core is rotatably provided in the spindle bearing sleeve, and the spindle core is connected to the output end of the reducer; a polishing head is provided at the bottom of the spindle core;

[0025] A liquid supply device is arranged between the main shaft support and the brush, and the liquid supply device comprises a flow dividing disc and one or more liquid supply pipes connecting the flow dividing disc and the polishing head.

[0026] Further, the lifting module includes one or more slide rails vertically arranged on the main mounting frame, and the main mounting frame is provided with a slide rail receiving groove, and the slide rail is embedded in the slide rail receiving groove; a slider receiving groove is provided on the spindle bracket, and a slider is provided in the slider receiving groove, and the slider cooperates with the slide rail; the lifting module also includes a lifting drive device arranged on the main mounting frame, and the movable end of the lifting drive device is connected to the spindle bracket;

[0027] The spindle support includes a horizontal support and a vertical support, the lower end of the vertical support is connected to one end of the horizontal support, the reducer is arranged on the horizontal support, the output end of the reducer is far away from the vertical support; the input end of the reducer is close to the vertical support;

[0028] An axial vent hole is provided at the center of the upper end of the spindle shaft core, and the axial vent hole extends to the lower end of the spindle bearing sleeve. More than one radial vent hole communicating with the axial vent hole is also provided on the spindle shaft core; a rotary joint is provided at the top end of the axial vent hole;

[0029] A main shaft turntable is arranged at the bottom of the main shaft core, and a polishing head is arranged at the bottom of the main shaft turntable.

[0030] Furthermore, the lifting drive device is a cylinder, the cylinder body of the cylinder is installed on the main mounting frame, and the piston rod of the cylinder is connected to the main shaft bracket; the number of the auxiliary guide columns is two, and the limit blocks at the top of the auxiliary guide columns are connected into a whole.

[0031] The above arrangement has reasonable design, stable structure, good stability of the whole machine and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0033] Figure 2 This is a schematic diagram of the structure of the embodiment of the utility model after removing the upper cover assembly;

[0034] Figure 3 This is a schematic diagram of the structure of the main shaft assembly in an embodiment of the utility model;

[0035] Figure 4 It is a structural schematic diagram of the main shaft assembly from another perspective of an embodiment of the utility model;

[0036] Figure 5 A top view of the spindle assembly according to an embodiment of the present utility model;

[0037] Figure 6 for Figure 5 Sectional view of the middle AA plane;

[0038] Figure 7 This is a schematic diagram of the structure of the station turntable assembly of the utility model embodiment;

[0039] Figure 8 It is a top view of the station turntable assembly of the embodiment of the utility model;

[0040] Fig. 9 for Figure 8 Middle BB plane section view;

[0041] Fig.10 This is a schematic diagram of the structure of the spindle assembly in an embodiment of the utility model;

[0042] Fig.11 A top view of the spindle assembly of an embodiment of the utility model;

[0043] Fig.12 for Fig.11 Middle CC section view. DETAILED DESCRIPTION

[0044] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] like Figures 1 to 12 As shown, a multi-station sheet polishing machine includes a frame 100 and a lower spindle assembly 1, a station turntable assembly 2 and an upper spindle assembly 3 respectively arranged on the frame 100.

[0046] The rack 100 includes a bottom frame assembly 101 , on which are disposed more than three supporting columns 102 . In this embodiment, there are four supporting columns 102 , which are distributed in a rectangular shape at four corners of the bottom frame assembly 101 .

[0047] A top cross frame 103 is provided at the top of the supporting column 102. In this embodiment, the top cross frame 103 is formed by criss-cross welding of square tubes. The bottom frame assembly 101, the supporting column 102 and the top cross frame 103 form a cage-like whole. This arrangement can effectively improve the overall structural strength of the polishing machine.

[0048] The multi-station sheet polishing machine also includes an upper cover assembly 104 for realizing closed processing and a grinding liquid circulation assembly 105 for providing grinding liquid to the upper spindle assembly 3 .

[0049] like Figures 3 to 6 As shown, the lower spindle assembly 1 includes a support platform 10 arranged on a bottom frame assembly 101. In this embodiment, the support platform 10 is a square table structure with four corners. A center support flange 11 is fixedly arranged on the support platform 10, and the axis of the center support flange 11 is perpendicular to the upper surface of the support platform 10.

[0050] A large workstation rotating flange 13 is arranged inside the central support flange 11 through the first bearing group 12; in this embodiment, the first bearing group 12 includes deep groove ball bearings respectively arranged at the upper and lower ends of the central support flange 11 and a one-way thrust ball bearing arranged between the two deep groove ball bearings.

[0051] A large driving double gear 15 is arranged on the top outer side of the central supporting flange 11 through a second bearing 14. In this embodiment, the second bearing 14 is a one-way thrust ball bearing; the large driving double gear 15 includes a driven driving gear 151 located at the bottom and a driving driving gear 152 located at the top, and the outer diameter of the driven driving gear 151 is smaller than the outer diameter of the driving driving gear 152.

[0052] In order to maintain the stability of the rotation of the large driving double gear 15, a third bearing group 16 is provided between the large station rotating flange 13 and the large driving double gear 15; a large station flange lower gear 17 is provided at the bottom end of the large station rotating flange 13.

[0053] The lower spindle assembly also includes a station drive assembly 18 for driving the large station flange lower gear 17 to rotate and a planetary drive assembly 19 for driving the large driving duplex gear 15 to rotate.

[0054] The station drive assembly 18 includes a station drive reducer 180, on the output shaft of which a station reducer gear 181 is provided, and the station reducer gear 181 meshes with the large station flange lower gear 17; the station drive assembly 18 also includes a station drive motor 182 for driving the input shaft of the station drive reducer 180 to rotate. When the station drive motor 182 is started, the large station flange lower gear 17 is driven to rotate through the station drive reducer 180 and the station reducer gear 181, thereby driving the large station rotating flange 13 to rotate.

[0055] The planetary drive assembly 19 includes a planetary drive reducer 190, on the output shaft of which a planetary power gear 191 is provided, and the planetary power gear 191 meshes with the driven drive gear 151. The planetary drive assembly 19 also includes a planetary drive motor 192 that drives the input shaft of the planetary drive reducer 190 to rotate. When the planetary drive motor 192 is started, the large drive double gear 15 is driven to rotate through the planetary drive reducer 190 and the planetary power gear 191.

[0056] An air hole penetrating the large station rotating flange 13 is provided at the center of the large station rotating flange 13 , and a rotating joint is provided at the bottom end of the air hole; the top end of the air hole is a trumpet-shaped air inlet.

[0057] like Figures 5 to 9As shown, the workstation turntable assembly 2 includes a large workstation turntable 20 disposed on a large workstation rotating flange 13, and more than two groups of workstation turntable assemblies 21 are disposed on the large workstation turntable 20. In this embodiment, the number of the workstation turntable assemblies 21 is four.

[0058] The station turntable assembly 21 includes a large planetary fixed flange sleeve 210 fixed on the station large turntable 20; a station lower gear 211 is provided at the bottom of the large planetary fixed flange sleeve 210 through a bearing; a small station rotating flange 213 is provided inside the large planetary fixed flange sleeve 210 through a fourth bearing group 212.

[0059] In this embodiment, the fourth bearing group 212 includes deep groove ball bearings respectively arranged at the upper and lower ends of the large planetary fixed flange sleeve 210 and a one-way thrust ball bearing arranged between the two deep groove ball bearings.

[0060] A clutch turntable 214 is provided at the lower part of the small station rotating flange 213 . The clutch turntable 214 can slide along the axial direction of the small station rotating flange 213 , and the small station rotating flange 213 can be driven to rotate by the clutch turntable 214 .

[0061] In this embodiment, a spline groove is provided on the lower body of the small workstation rotating flange 213, and a groove matching the spline groove is provided on the clutch turntable 214, so that the clutch turntable 214 can slide axially along the small workstation rotating flange 213 and drive the small workstation rotating flange 213 to rotate.

[0062] A connecting piece for transmitting power is also provided between the clutch turntable 214 and the lower gear 211 of the workstation. In this embodiment, the connecting piece is a round-headed locating pin with a threaded hole (not shown), and one end of the round-headed locating pin with a threaded hole is fixed to the clutch turntable 214 by a bolt.

[0063] An elastic component is also provided at the lower part of the small station rotating flange 213 to normally make the clutch rotating disk 214 abut against the station lower gear 211. The abutment mentioned here means that the clutch rotating disk 214 always keeps in contact with the station lower gear 211 when the clutch rotating disk 214 is not affected by any force other than the force applied by the elastic component.

[0064] In this embodiment, the elastic component is a pre-stressed spring 215 provided at the bottom of the clutch rotary plate 214 , and a pre-stressed spring nut 216 for resisting the pre-stressed spring 215 is provided at the bottom of the small station rotating flange 213 .

[0065] An annular groove 2140 is formed on the clutch rotating disk 214 .

[0066] A small planetary wheel fixing plate 217 is provided on the upper part of the small workstation rotating flange 213, and more than one workstation small turntable assembly 23 is provided on the small planetary wheel fixing plate 217, and the distance from the rotation center of each workstation small turntable assembly 23 to the rotation center of the small planetary wheel fixing plate 217 is equal.

[0067] In this embodiment, the number of the small turntable assemblies 23 of the workstation is three, and the small turntable assemblies 23 of the workstation include an asteroid fixing flange sleeve 230 arranged on the asteroid wheel fixing plate 217, and a planetary rotating flange 232 is arranged inside the asteroid fixing flange sleeve 230 through the fifth bearing group 231, and a workstation lower turntable 233 is arranged on the top of the planetary rotating flange 232, and a workstation upper turntable 234 is arranged on the top of the workstation lower turntable 233, and an air suction hole for adsorbing workpieces is arranged on the workstation upper turntable 234.

[0068] A rotary joint is provided at the bottom end of the planetary rotary flange 232 .

[0069] The structure of the fifth bearing group 231 is consistent with that of the fourth bearing group 212 .

[0070] The workstation turntable assembly 21 further comprises a workstation turntable rotation driving device for driving the workstation small turntable assembly 23 to rotate.

[0071] In this embodiment, the work station turntable rotation drive device includes a work station asteroid gear 235 fixedly connected to the bottom of the planetary rotating flange 232, and the work station asteroid gear 235 does not contact the asteroid fixed flange sleeve 230; a work station inner gear ring 236 is fixed on the work station large turntable by a support rod, and the work station asteroid gear 235 is meshed with the work station inner gear ring 236.

[0072] The rotation of the small workstation rotating flange 213 drives the asteroid wheel fixing plate 217 to rotate. Since the workstation inner gear ring 236 is fixed, the rotation of the asteroid wheel fixing plate 217 can make the workstation asteroid gear 235 roll along the workstation inner gear ring 236. The workstation asteroid gear 235 rotates while rolling, causing the lower turntable 233 of the workstation to rotate, thereby driving the workpiece to rotate.

[0073] An air hole penetrating the small workstation rotating flange 213 is provided in the small workstation rotating flange 213, and a rotating joint is provided at the bottom end of the air hole; the air hole penetrating the small workstation rotating flange 213 is connected to the rotating joint at the bottom end of the planetary rotating flange 232 through an air pipe. When the rotating joint at the bottom end of the small workstation rotating flange 213 is connected to a vacuum source, an adsorption effect can be formed on the workpiece on the turntable 234 on the workstation.

[0074] like Figure 3As shown, a clutch assembly 22 is also provided on the bottom frame assembly 101. The clutch assembly 22 includes a clutch slide rail 221 vertically arranged on the side wall of the bottom frame assembly 101, a clutch slider 222 is provided on the clutch slide rail 221, a clutch pressure plate 223 is provided on the clutch slider 222, and one end of the clutch pressure plate 223 away from the slider 222 extends into the annular groove 2140.

[0075] A clutch driving cylinder 224 is also provided on the bottom frame assembly 101 , which can make the clutch pressure plate 223 move up and down along the slide rail 221 . The piston rod of the clutch driving cylinder 224 is connected to the clutch pressure plate 223 .

[0076] When the clutch drive cylinder 224 applies downward force to the clutch pressure plate 223, the round head positioning pin on the clutch turntable 214 disengages from the lower station gear 211, disconnecting the power transmitted to the lower station gear 211 by the large driving double gear 15, and the small station rotating flange 213 loses power and stops rotating.

[0077] like Figure 3 As shown, a positioning device 24 is also provided on the bottom frame assembly 101 for accurately positioning the workstation turntable 20. The positioning device 24 includes a positioning cylinder 240 provided on the bottom frame assembly 101, a positioning rod 241 is provided on the piston rod of the positioning cylinder 240, and a positioning seat 242 with a positioning groove cooperating with the positioning rod 241 is provided at the bottom of the workstation turntable 20.

[0078] When the positioning cylinder 240 drives the positioning rod 241 to extend into the positioning groove of the positioning seat 242, the large turntable 20 of the workstation can be accurately positioned to prevent the small turntable assembly 23 of the workstation from swinging due to the force generated by the rotation of the polishing head.

[0079] like Figures 10 to 12 As shown, the upper spindle assembly 3 includes a main mounting frame 30 arranged on the top cross frame 103.

[0080] like Figure 2 and Fig.10 As shown, a lifting module 31 is provided on the main mounting frame 30 , and a main shaft support 32 is provided on the lifting module 31 .

[0081] In this embodiment, the lifting module 31 includes one or more slide rails 311 vertically arranged on the main mounting frame 30, and a slide rail accommodating groove is provided on the main mounting frame 30, and the slide rail 311 is embedded in the slide rail accommodating groove; a slider accommodating groove is provided on the main shaft support 32, and a slider 312 is provided in the slider accommodating groove, and the slider 312 cooperates with the slide rail 311; the lifting module 31 also includes a lifting drive device 313 arranged on the main mounting frame 30, and the movable end of the lifting drive device 313 is connected to the main shaft support 32.

[0082] In this embodiment, there are two slide rails 311 and four sliders 312. Two sliders 312 are arranged on one slide rail 311; and the lifting drive device 313 is a cylinder.

[0083] The spindle support 32 includes a transverse support 320 and a vertical support 321 . The lower end of the vertical support 321 is connected to one end of the transverse support 320 . An L-shaped reinforcing plate 322 is provided between the transverse support 320 and the vertical support 321 .

[0084] A spindle driving device 33 is provided on the spindle support 32 . The spindle driving device 33 includes a reducer 330 and a lifting driving motor 331 for driving the reducer 330 to rotate.

[0085] In this embodiment, the reducer 330 is disposed on the horizontal bracket 320 , and the output end of the reducer 330 is far away from the vertical bracket 321 ; the input end of the reducer 330 is close to the vertical bracket 321 .

[0086] A sub-mounting frame 34 is also provided on the spindle support 32 . The sub-mounting frame 34 includes one or more auxiliary guide pillars 341 . In the present embodiment, there are two auxiliary guide pillars 341 . Limiting blocks 342 are fixedly provided at the top ends of the two auxiliary guide pillars 341 .

[0087] like Figure 2 As shown, an auxiliary guide sleeve 343 is slidably provided on the auxiliary guide column 341 .

[0088] In this embodiment, the auxiliary guide sleeve 343 is connected via a guide sleeve fixing plate 345 , and both ends of the guide sleeve fixing plate 345 are firmly welded to the top cross frame 103 .

[0089] The length of the auxiliary guide column 341 is calculated. When the spindle bracket 32 ​​descends, the auxiliary guide sleeve 343 supports the limit block 342, and the auxiliary guide column 341 pulls one end of the horizontal bracket 320 away from the vertical bracket 321 to form a stable structure, thereby preventing the cantilever structure of the spindle bracket 32 ​​from deforming, thereby improving the processing accuracy and the service life of the machine.

[0090] like Fig.12 As shown, a spindle bearing sleeve 350 coaxial with the output end of the reducer 330 is provided at the bottom of the spindle support 32 .

[0091] A deep groove ball bearing is provided at each end of the main shaft bearing sleeve 350, and a one-way thrust ball bearing is provided between the two deep groove ball bearings. A main shaft core 351 is rotatably provided in the main shaft bearing sleeve 350, and the main shaft core 351 is connected to the output end of the reducer 330; a polishing head 36 is provided at the bottom of the main shaft core 351.

[0092] In this embodiment, the polishing head 36 includes a spindle turntable 360 ​​connected to the bottom of the spindle shaft core 351 and a brush 361 provided at the bottom of the spindle turntable 360. The brush 361 is connected to the spindle turntable 360 ​​through more than three right-angle locks 362. The rotation of the spindle shaft core 351 drives the brush 361 to rotate.

[0093] An axial air vent 352 is provided at the center of the upper end of the spindle core 351. The axial air vent 352 extends to the lower part of the spindle bearing sleeve 350 but does not penetrate the lower part of the spindle bearing sleeve 350. There is also one or more radial air vents 353 in communication with the axial air vent 352 on the spindle core 351. The radial air vents 353 lead to between the spindle bearing sleeve 350 and the spindle core 351; a rotary joint is provided at the top of the axial air vent 352; and an oil seal is also provided between the deep groove ball bearing at the bottom and the radial air vent 353.

[0094] By introducing compressed air into the axial vent hole 352 through the rotary joint, the grinding fluid can be effectively prevented from entering between the spindle bearing sleeve 350 and the spindle shaft core 351, thereby preventing rust and effectively extending the service life of the machine.

[0095] like Fig.10 As shown, a liquid supply device is provided between the spindle support 32 and the brush 361, and the liquid supply device includes a diverter disc 370 and one or more liquid supply pipes 371 connecting the diverter disc 370 and the brush 361. Abrasive liquid is injected into the diverter disc 370 through a water pipe, and the abrasive liquid can flow into the bristles of the brush 361 through the liquid supply pipe 371 to polish the workpiece.

[0096] A water retaining ring 364 is provided on the outer circumference of the spindle turntable 360, and a water retaining ring 363 surrounding the polishing head 36 is provided on the water retaining ring 364, and the lower end of the water retaining ring 363 is lower than the lower end of the polishing head 36. In this embodiment, the water retaining ring 363 is a silicone water retaining ring.

[0097] In this solution, the cage-type overall structure formed by the upper spindle assembly is stable in structure, convenient for setting up the upper spindle assembly, and can prevent the upper spindle assembly from deforming, which would result in poor machining accuracy; the lower spindle assembly, the workstation turntable assembly and the upper spindle assembly are reasonably matched, and the components cooperate with each other, so that the production efficiency of the whole machine is high and the stability is good.

Claims

1. A multi-station sheet polishing machine, comprising a frame and a lower spindle assembly, a station turntable assembly and an upper spindle assembly respectively arranged on the frame, characterized in that: The frame includes a bottom frame assembly, on which more than three supporting columns are arranged, and a top cross frame is arranged at the top of the supporting columns; the bottom frame assembly, the supporting columns and the top cross frame form a cage-type whole, and the upper spindle assembly is arranged on the top cross frame; The upper spindle assembly comprises a main mounting frame arranged on the top cross frame, a lifting module is arranged on the main mounting frame, and a spindle bracket is arranged on the lifting module; a sub-mounting frame is also arranged on the spindle bracket, the sub-mounting frame comprises more than one auxiliary guide column, a limit block is arranged on the top of the auxiliary guide column, an auxiliary guide sleeve is slidably arranged on the auxiliary guide column, and the auxiliary guide sleeve is arranged on the top cross frame; The multi-station sheet polishing machine also includes an upper cover component for realizing closed processing and a grinding liquid circulation component for providing grinding liquid to the upper spindle component.

2. The multi-station sheet polishing machine according to claim 1, characterized in that: The lower spindle assembly includes a support platform arranged on the bottom frame assembly, a central support flange is fixedly arranged on the support platform, a large workstation rotating flange is arranged inside the central support flange through a first bearing group; a large driving double gear is arranged on the top outer side of the central support flange through a second bearing; a third bearing group is also arranged between the large workstation rotating flange and the large driving double gear; a large workstation flange lower gear is arranged at the bottom end of the large workstation rotating flange; The lower spindle assembly also includes a station drive assembly for driving the lower gear of the large station flange to rotate and a planetary drive assembly for driving the large driving double gear to rotate.

3. The multi-station sheet polishing machine according to claim 2, characterized in that: An air hole penetrating the large-station rotating flange is provided at the center of the large-station rotating flange, and a first rotating joint is provided at the bottom end of the air hole; the top end of the air hole is trumpet-shaped.

4. The multi-station sheet polishing machine according to claim 2, characterized in that: The station drive assembly includes a station drive reducer, and a station reducer gear is provided on the output shaft of the station drive reducer, and the station reducer gear is meshed with the gear under the large station flange; The station drive assembly also includes a station drive motor for driving the input shaft of the station drive reducer to rotate; The large drive duplex gear includes a driven drive gear at the bottom; The planetary drive assembly includes a planetary drive reducer, on the output shaft of which a planetary power gear is provided, and the planetary power gear is meshed with a driven drive gear; The planetary drive assembly further includes a planetary drive motor for driving the input shaft of the planetary drive reducer to rotate.

5. The multi-station sheet polishing machine according to claim 1, characterized in that: The station turntable assembly includes a station turntable arranged on a large station rotating flange, and more than two groups of station turntable assemblies are arranged on the station turntable. The station turntable assembly includes a large planetary fixed flange sleeve fixed on the station turntable; a station lower gear is arranged at the bottom of the large planetary fixed flange sleeve through a bearing; a small station rotating flange is arranged inside the large planetary fixed flange sleeve through a fourth bearing group, and a clutch turntable is arranged at the lower part of the small station rotating flange, and the clutch turntable can slide along the axial direction of the small station rotating flange, and the small station rotating flange can be driven to rotate by the clutch turntable; A connecting piece for transmitting power is also provided between the clutch rotating disc and the lower gear of the station, and an elastic component for making the clutch rotating disc abut against the lower gear of the station under normal conditions is also provided at the lower part of the rotating flange of the small station; A small planetary wheel fixing plate is provided on the upper part of the small station rotating flange, and more than one small turntable assembly of the station is provided on the small planetary wheel fixing plate, and the distance between the rotation center of each small turntable assembly of the station and the rotation center of the small planetary wheel fixing plate is equal; The workstation turntable assembly also includes a workstation turntable rotation driving device for driving the workstation turntable to rotate.

6. The multi-station sheet polishing machine according to claim 5, characterized in that: An air hole penetrating the small-station rotating flange is provided in the small-station rotating flange, and a second rotating joint is provided at the bottom end of the air hole; The station turntable rotation driving device comprises a station small planetary gear fixedly connected to the planetary rotating flange; a station inner gear ring is fixedly arranged on the station large turntable through a support rod, and the station small planetary gear is meshed with the station inner gear ring.

7. The multi-station sheet polishing machine according to claim 1, characterized in that: The upper spindle assembly also includes a spindle drive device arranged on the spindle bracket, and the spindle drive device includes a reducer; a spindle bearing sleeve coaxial with the output end of the reducer is arranged at the bottom of the spindle bracket, and a spindle core is rotatably arranged in the spindle bearing sleeve, and the spindle core is connected to the output end of the reducer; a polishing head is arranged at the bottom of the spindle core; A liquid supply device is arranged between the main shaft support and the brush, and the liquid supply device comprises a flow dividing disc and one or more liquid supply pipes connecting the flow dividing disc and the polishing head.

8. The multi-station sheet polishing machine according to claim 7, characterized in that: The lifting module includes one or more slide rails vertically arranged on the main mounting frame, and the main mounting frame is provided with a slide rail receiving groove, and the slide rail is embedded in the slide rail receiving groove; a slider receiving groove is provided on the spindle bracket, and a slider is provided in the slider receiving groove, and the slider cooperates with the slide rail; the lifting module also includes a lifting drive device arranged on the main mounting frame, and the movable end of the lifting drive device is connected to the spindle bracket; The spindle support includes a horizontal support and a vertical support, the lower end of the vertical support is connected to one end of the horizontal support, the reducer is arranged on the horizontal support, the output end of the reducer is far away from the vertical support; the input end of the reducer is close to the vertical support; An axial vent hole is provided at the center of the upper end of the spindle shaft core, and the axial vent hole extends to the lower end of the spindle bearing sleeve. More than one radial vent hole communicating with the axial vent hole is also provided on the spindle shaft core; a rotary joint is provided at the top end of the axial vent hole; A main shaft turntable is arranged at the bottom of the main shaft core, and a polishing head is arranged at the bottom of the main shaft turntable.

9. The multi-station sheet polishing machine according to claim 8, characterized in that: The lifting drive device is a cylinder, the cylinder body of the cylinder is installed on the main mounting frame, and the piston rod of the cylinder is connected to the main shaft bracket; the number of the auxiliary guide columns is two, and the limit blocks at the top of the auxiliary guide columns are connected into a whole.

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