Suspension method and suspension device for upper grinding disc of grinding machine

Abstract

According to the method and device for hanging the upper grinding disc of the grinding machine, a metal knuckle bearing is installed at the lower end of a hanging rod, an inner bearing packaging shell is installed on the periphery of the metal knuckle bearing, an outer bearing is arranged on the inner bearing packaging shell in a sleeving mode, and an outer bearing packaging shell is installed on the periphery of the outer bearing and the periphery of the inner bearing packaging shell; an upper grinding disc mechanism is fixedly connected to the outer bearing packaging shell; the rotating angle of the upper millstone mechanism hung on the outer bearing packaging shell is increased by installing the metal joint bearing at the lower end of the hanging rod; the outer bearing is arranged between the inner bearing packaging shell and the outer bearing packaging shell, so that abrasion to the metal joint bearing when the suspended upper millstone mechanism rotates is reduced. The outer bearing is arranged between the inner bearing packaging shell and the outer bearing packaging shell, so that abrasion to the metal joint bearing when the suspended upper millstone mechanism rotates is reduced, the maintenance cost and the maintenance time of the suspension device are reduced, the working efficiency is improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The invention relates to a suspension device and a suspension method, and in particular to a suspension method and a suspension device for a grinding disc on a grinding machine. Background Art

[0002] A grinding and polishing machine is a commonly used grinding and polishing mechanical equipment, which is widely used in the surface treatment process of metal, glass, ceramics and other materials. A polishing disc or polishing cloth for grinding and polishing is set on the workbench of the grinding and polishing machine, so that the polishing disc or polishing cloth rubs back and forth on the surface of the product, thereby removing scratches and defects on the surface of the product, and at the same time improving the finish and flatness of the surface of the product.

[0003] When grinding products with curved surfaces, some existing grinders add a steering device so that the grinding disc can turn while rotating around the main axis, just like an electric fan can shake its head while rotating; some grind by constantly adjusting the angle of the product, so as to grind the product with curved surfaces comprehensively. Both of the above methods require the addition of equipment or devices for adjusting the angle, which will increase the grinding cost.

[0004] In order to make the grinding disc rotate around the main shaft and turn at the same time, although a metal joint can be set in the suspension device to solve this technical problem, the upper grinding disc mechanism will always drive the metal joint in the suspension device to rotate during long-term operation, causing serious wear of the metal joint bearing, and the metal joint bearing needs to be replaced frequently. Replacing the metal joint bearing requires disassembly and assembly of the suspension device and the upper grinding disc mechanism. Therefore, how to improve the suspension device and suspension method of the upper grinding disc and reduce the maintenance cost of the suspension device requires further research. Summary of the invention

[0005] The technical problem to be solved by the present invention is: how to improve the structure and method of the suspension device of the upper grinding disc, reduce the maintenance cost and maintenance time of the suspension device, and improve work efficiency.

[0006] In view of the above problems, the technical solution proposed in the present invention is: a method for suspending a grinding disc on a grinding machine, wherein a metal joint bearing is installed at the lower end of a suspension rod, an inner bearing encapsulation shell is installed on the periphery of the metal joint bearing, an outer bearing is sleeved on the inner bearing encapsulation shell, and an outer bearing encapsulation shell is installed on the periphery of the outer bearing and the inner bearing encapsulation shell, and an upper grinding disc mechanism is fixedly connected to the outer bearing encapsulation shell; a metal joint bearing is installed at the lower end of the suspension rod to increase the rotation angle of the upper grinding disc mechanism suspended on the outer bearing encapsulation shell; an outer bearing is arranged between the inner bearing encapsulation shell and the outer bearing encapsulation shell to reduce the wear of the metal joint bearing when the suspended upper grinding disc mechanism rotates.

[0007] Preferably, a bottom stop is provided at the bottom of the hanger to limit the metal joint bearing in the vertical downward direction; a stop gasket and a lower nut are installed on the hanger to limit the metal joint bearing in the vertical upward direction; an inwardly recessed stop groove and an annular groove are opened on the hanger, the stop gasket is installed in the annular groove, and one end of the stop gasket is embedded between the stop groove and the lower nut to limit the stop gasket in the vertical and circumferential directions; thereby preventing the metal joint bearing from moving on the hanger when the upper grinding disc mechanism is working.

[0008] Preferably, a bearing mounting seat and a bearing pressure plate are arranged in the inner bearing packaging shell, the bearing mounting seat is sleeved on the upper end of the metal joint bearing, the bearing pressure plate is sleeved on the lower end of the metal joint bearing, and the bearing mounting seat and the bearing pressure plate are fixedly connected by bolts, so that the inner bearing packaging shell wraps the metal joint bearing inside; a bearing upper cover, a bearing sleeve and a bearing lower cover are arranged in the outer bearing packaging shell, and grooves are opened on the inner sides of the top and bottom of the bearing sleeve, the bearing upper cover is fixedly connected to the groove at the top of the bearing sleeve, and the bearing lower cover is fixedly connected to the groove at the bottom of the bearing sleeve; an outer bearing is sleeved on the bearing mounting seat, and a bearing sleeve is sleeved on the outer bearing, so that the outer bearing packaging shell wraps the outer bearing and the inner bearing packaging shell inside; thereby a rotation buffer structure is formed between the outer bearing packaging shell and the metal joint bearing, reducing the wear of the metal joint bearing when the suspended upper grinding disc mechanism rotates.

[0009] A suspension device for a grinding disc on a grinding machine comprises a suspension rod, a metal joint bearing, an inner bearing packaging shell, an outer bearing and an outer bearing packaging shell, wherein the metal joint bearing is mounted at the lower end of the suspension rod, the inner bearing packaging shell is wrapped around the outer periphery of the metal joint bearing, the outer bearing is sleeved on the inner bearing packaging shell, and the outer bearing packaging shell wraps the outer bearing and the inner bearing packaging shell inside; and the upper ends of the inner bearing packaging shell and the outer bearing packaging shell are both provided with through mounting holes, and the suspension rod passes through the mounting holes and extends out of the outer bearing packaging shell.

[0010] Preferably, the metal joint bearing includes a ball core and a sleeve, the ball core is embedded in the sleeve, and a through mounting hole is opened on the ball core; the suspension rod includes a rod body, an annular belt and a bottom stop, the annular belt is integrally formed on the rod body, and a cylindrical bottom stop is provided at the bottom of the rod body. The ball core of the metal joint bearing is sleeved on the lower end of the suspension rod, and the bottom stop limits the metal joint bearing.

[0011] Preferably, an upper nut and a lower nut are also installed on the rod body, and the upper ends of the ring band and the rod body are both provided with external threads, the upper nut is installed on the upper end of the rod body by threaded cooperation, and the lower nut is installed on the ring band by threaded cooperation; an annular groove is also opened at the lower end of the rod body, and the annular groove is below the annular band; an inwardly recessed stop groove is also opened on the rod body, and the length direction of the stop groove is the vertical direction; the annular groove is provided with a fracture at the stop groove, and the fracture width of the annular groove is equal to the width of the stop groove.

[0012] Preferably, it also includes a stop gasket, which includes a ring body, an outer stop plate and an inner stop plate, the ring body is in a circular ring shape, the outer stop plate is integrally formed on the outer side of the ring body, the inner stop plate is integrally formed on the inner side of the ring body, and the vertical cross-section of the inner stop plate is L-shaped; the ring body of the stop gasket is embedded in the annular groove, and the inner side of the inner stop plate of the stop gasket is embedded in the stop groove of the rod body.

[0013] Preferably, the inner bearing packaging shell includes a bearing mounting seat and a bearing pressure plate, the bearing mounting seat includes an upper seat body and a lower seat body, the upper seat body and the lower seat body are both rotating bodies, and the lower seat body is integrally formed at the lower end of the upper seat body; the bearing pressure plate includes a pressure ring and a base plate, the pressure ring and the base plate are both annular, and the base plate is integrally formed at the lower end of the pressure ring; the upper seat body and the base plate are both provided with through mounting holes, and bolts pass through the mounting holes to fix the bearing mounting seat and the bearing pressure plate together, and the bearing mounting seat and the bearing pressure plate wrap the metal spherical bearing inside.

[0014] Preferably, the outer bearing packaging shell includes a bearing upper cover, a bearing sleeve and a bearing lower cover, and grooves are provided on the inner sides of the top and bottom of the bearing sleeve. The bearing upper cover is embedded in the groove at the top of the bearing sleeve, and the bearing lower cover is embedded in the groove at the bottom of the bearing sleeve; the inner side of the outer bearing is sleeved on the upper seat body, and the bearing sleeve is sleeved on the outer side of the outer bearing.

[0015] Preferably, the bottom of the groove at the top of the bearing sleeve has an upper end surface, and the top of the groove at the bottom of the bearing sleeve has a lower end surface, and the upper end surface and the lower end surface have mounting holes along the circumferential direction; the bearing upper cover and the bearing lower cover have mounting holes corresponding to the mounting holes of the upper end surface and the lower end surface, and the bearing upper cover and the bearing lower cover are fixedly connected to the two ends of the bearing sleeve by passing bolts through the above-mentioned mounting holes.

[0016] The beneficial technical effects of the present invention are as follows: a metal joint bearing is arranged in the suspension device of the upper grinding disc of the grinder, so that the suspension device can greatly adjust the steering of the upper grinding disc in all directions, so that the upper grinding disc of the grinder can grind products with curved surfaces. A bottom stopper and a stop gasket are arranged on the suspension rod to limit the metal joint bearing together to prevent the metal joint bearing from moving on the suspension rod. By arranging an outer bearing between the inner bearing encapsulation shell and the outer bearing encapsulation shell, the wear of the metal joint bearing when the upper grinding disc mechanism of the suspension rotates is reduced, thereby reducing the maintenance cost and maintenance time of the suspension device, improving work efficiency, and reducing manual labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the first embodiment; Figure 2 for Figure 1 A schematic diagram of the structure of the outer bearing enclosure hidden in the middle; Figure 3 for Figure 2Schematic diagram of the decomposition structure; Figure 4 for Figure 2 The schematic diagram of the structure of the hidden outer bearing and the pressing sleeve; Figure 5 is a schematic diagram of the three-dimensional structure of the rod body in Example 1; Figure 6 It is a schematic diagram of the three-dimensional structure of the stop gasket in the first embodiment; Figure 7 It is a schematic diagram of the structure of the outer bearing packaging shell in the first embodiment; Figure 8 for Figure 7 The decomposition structure of Figure 1 ; Fig. 9 for Figure 7 The decomposition structure of Figure 2 ; In the figure: ball core 11, outer sleeve 12, rod body 21, annular belt 22, bottom stopper 23, stopper groove 24, annular groove 25, upper nut 26, lower nut 27, ring body 31, outer baffle 32, inner baffle 33, upper seat body 41, lower seat body 42, pressure ring 51, bottom plate 52, outer bearing 6, pressure sleeve 7, bearing upper cover 81, bearing sleeve 82, convex edge 821, upper end face 822, lower end face 823, bearing lower cover 83. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with embodiments and drawings: In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the suspension device of the grinding disc on the grinding machine includes a suspension rod, a metal joint bearing, an inner bearing encapsulation shell, an outer bearing 6 and an outer bearing 6 encapsulation shell. The metal joint bearing includes a ball core 11 and an outer sleeve 12. The outer sleeve 12 is a hollow cylinder. The hollow part of the outer sleeve 12 is spherical. The ball core 11 is embedded in the outer sleeve 12, and the ball core 11 and the outer sleeve 12 are clearance-matched. The suspension rod passes through the mounting hole of the metal joint bearing so that the metal joint bearing is installed at the lower end of the suspension rod. The inner bearing encapsulation shell is wrapped around the outer periphery of the metal joint bearing, the outer bearing 6 is sleeved on the inner bearing encapsulation shell, and the outer bearing 6 encapsulation shell encapsulates the outer bearing 6 and the inner bearing encapsulation shell inside. The upper ends of the inner bearing encapsulation shell and the outer bearing 6 encapsulation shell are both provided with through mounting holes, and the suspension rod passes through the mounting holes and extends out of the outer bearing 6 encapsulation shell.

[0019] like Figures 1 to 4As shown, the inner bearing encapsulation shell includes a bearing mounting seat and a bearing pressure plate, and the bearing mounting seat includes an upper seat body 41 and a lower seat body 42, and the lower seat body 42 is integrally formed at the lower end of the upper seat body 41. The upper end and the lower end of the upper seat body 41 are both annular, and the entire upper seat body 41 is an annular step-shaped. The upper end and the lower end of the lower seat body 42 are also annular, and the entire lower seat body 42 is also an annular step-shaped, and the upper end of the lower seat body 42 is integrally formed with the lower end of the seat body. The bearing pressure plate includes a pressure ring 51 and a bottom plate 52, and the pressure ring 51 and the bottom plate 52 are both annular, and the bottom plate 52 is integrally formed at the lower end of the pressure ring 51, and the entire bearing pressure plate is also an annular step-shaped.

[0020] The bearing mounting seat is sleeved on the upper end of the metal spherical bearing, and the inner side of the upper end of the bearing mounting seat is against the top of the outer sleeve 12 of the metal spherical bearing, and the upper end of the bearing pressure plate is sleeved on the lower end of the outer sleeve 12 of the metal spherical bearing. A pressing sleeve 7 is arranged above the bearing mounting seat, and the pressing sleeve 7 is annular. Through mounting holes are opened on the pressing sleeve 7, the upper end of the upper seat body 41 and the bottom plate 52. Bolts pass through the mounting holes to fix the pressing sleeve 7, the bearing mounting seat and the bearing pressure plate together, and the bearing mounting seat and the bearing pressure plate wrap the metal spherical bearing inside.

[0021] like Figures 3 to 6 As shown, the suspension rod includes a rod body 21, an annular belt 22 and a bottom stopper 23. In this embodiment, the rod body 21 is formed integrally of three sections of cylinders, namely, upper, middle and lower sections, and the outer diameters of the three sections of cylinders increase from top to bottom. The annular belt 22 is annular, integrally formed on the rod body 21, and has a fracture. The rod body 21 also has an inwardly concave stopper groove 24, the length direction of the stopper groove 24 is the vertical direction, and the fracture width of the annular groove 25 is equal to the width of the stopper groove 24. The rod body 21 has an annular groove 25 at the junction of the middle section cylinder and the lower end cylinder, and the annular groove 25 is below the annular belt 22.

[0022] A backstop gasket is installed in the annular groove 25. The backstop gasket includes a ring body 31, an outer baffle 32 and an inner baffle 33. The ring body 31 is annular. The outer baffle 32 is integrally formed on the outer side of the ring body 31. The inner baffle 33 is integrally formed on the inner side of the ring body 31. The vertical cross section of the inner baffle 33 is L-shaped. The inner baffle 33 of the backstop gasket is embedded in the stop groove 24 of the rod body 21. The stop groove 24 limits the inner baffle 33 to prevent the backstop gasket from rotating in the annular groove 25.

[0023] An upper nut 26 and a lower nut 27 are also installed on the rod body 21. The upper ends of the ring belt 22 and the rod body 21 are both provided with external threads. The upper nut 26 is installed on the upper end of the rod body 21 through threaded fit, and the lower nut 27 is installed on the ring belt 22 through threaded fit. The installation process of the stop gasket, the upper nut 26 and the lower nut 27 is as follows: first, the stop gasket is directly put from top to bottom on the rod body 21, and the inner stopper 33 of the stop gasket is aligned with the fracture of the ring belt 22 and the stop groove 24. When the inner stopper 33 is embedded in the stop groove 24 of the rod body 21, the ring body 31 of the stop gasket can pass through the ring belt 22 and be embedded in the annular groove 25, and then the lower nut 27 and the upper nut 26 are installed in sequence. Among them, the stop groove 24 limits the inner stopper 33 in the rotation direction, the annular groove 25 limits the downward movement direction of the inner stopper 33, and the lower nut 27 limits the upward movement direction of the stop gasket. After tightening the lower nut 27, the stop washer can neither rotate nor move.

[0024] A cylindrical bottom stopper 23 is provided at the bottom of the rod body 21, and the outer diameter of the bottom stopper 23 is larger than the aperture of the mounting hole of the ball core 11, and the aperture of the mounting hole of the ball core 11 is larger than or equal to the diameter of the lower end of the rod body 21. The bottom stopper 23 can limit the downward movement direction of the metal joint bearing, and the outer stopper 32 of the stop washer can limit the upward movement direction of the metal joint bearing.

[0025] Figures 7 to 9 As well as Figures 1 to 3 As shown, the outer bearing 6 packaging shell includes a bearing upper cover 81, a bearing sleeve 82 and a bearing lower cover 83, and the inner sides of the top and bottom of the bearing sleeve 82 are both provided with grooves. The bearing upper cover 81 is embedded in the groove at the top of the bearing sleeve 82, and the bottom of the groove at the top of the bearing sleeve 82 has an upper end face 822, and the bearing upper cover 81 and the upper end face 822 have matching mounting holes along the circumferential direction. The bolts pass through the mounting holes of the bearing upper cover 81 and the upper end face 822 of the bearing sleeve 82, and the bearing upper cover 81 is fixedly connected with the bearing sleeve 82. The bearing lower cover 83 is embedded in the groove at the bottom of the bearing sleeve 82, and the top of the groove at the bottom of the bearing sleeve 82 has a lower end face 823, and the bearing lower cover 83 and the upper and lower surfaces have matching mounting holes along the circumferential direction. The bolts pass through the mounting holes of the bearing lower cover 83 and the lower end face 823 of the bearing sleeve 82, and the bearing lower cover 83 is fixedly connected with the bearing sleeve 82.

[0026] The structure of the bearing upper cover 81 and the bearing lower cover 83 of this embodiment is similar to the shape of the bearing pressure plate, both of which are formed as a double ring, and the bearing upper cover 81 and the bearing lower cover 83 are also annular step-shaped. The difference is that a through mounting hole is opened in the middle of the bearing upper cover 81, and the rod body 21 passes through the mounting hole of the bearing upper cover 81. The outer bearing 6 is a deep groove ball bearing, and the outer bearing 6 is sleeved on the upper seat body 41 of the bearing mounting seat, and the upper seat body 41 is connected to the outer bearing 6 by interference fit.

[0027] The middle of the bearing sleeve 82 is provided with a mounting hole that passes through the bearing sleeve 82 in the vertical direction. The outer bearing 6 is embedded in the mounting hole that passes through the bearing sleeve 82, and the bearing sleeve 82 is also connected with the outer bearing 6 by interference fit. The inner rings of the bearing upper cover 81 and the bearing lower cover 83 are also embedded in the mounting hole that passes through the bearing sleeve 82, and the outer bearing 6 is located between the bearing upper cover 81 and the bearing lower cover 83. The inner rings of the bearing upper cover 81 and the bearing lower cover 83 are respectively against the top and bottom of the outer bearing 6, and the bearing upper cover 81 and the bearing lower cover 83 limit the outer bearing 6 in the vertical direction. Since the outer diameter of the pressing sleeve 7 is smaller than the inner diameter of the inner ring of the bearing upper cover 81, and the height of the pressing sleeve 7 is also smaller than the height of the inner ring of the bearing upper cover 81. Therefore, when the bottom of the inner ring of the bearing upper cover 81 is against the top of the outer bearing 6, the inner side of the bearing upper cover 81 and the top of the pressing sleeve 7 are against each other in the vertical direction, and there is a gap in the circumferential direction.

[0028] like Figures 1 to 9 As shown, since the size of the outer nut and the retaining washer is smaller than the mounting hole of the upper seat body 41 , the outer diameter of the outer bearing 6 is the same as the hole diameter of the mounting hole that passes through the bearing sleeve 82 . Therefore, the entire installation process of this embodiment is: first install the metal joint bearing on the lower end of the rod body 21, then install the stop gasket in the annular groove 25, and then install the lower nut 27 on the annular belt 22 of the rod body 21, then put the bearing mounting seat on the upper end of the metal joint bearing, and put the bearing pressure plate on the lower end of the metal joint bearing, and then place the pressing sleeve 7 above the bearing mounting seat, and then use bolts to pass through the mounting holes on the pressing sleeve 7, the bearing mounting seat and the bearing pressure plate to fix them together, and then put the outer bearing 6 on the upper seat body 41, and then put the bearing sleeve 82 on the outer bearing 6, and then pass the bearing upper cover 81 through the rod body 21 and embed it in the groove at the top of the bearing sleeve 82, and the bearing lower cover 83 is embedded in the groove at the bottom of the bearing sleeve 82, and the bearing upper cover 81 and the bearing lower cover 83 are respectively fixedly connected to the two ends of the bearing sleeve 82 with bolts, and finally the upper nut 26 is installed on the upper end of the rod body 21.

[0029] In this embodiment, an annular flange 821 is provided on the outer side of the lower end of the bearing sleeve 82, and a through mounting hole is opened on the flange 821. When the upper grinding disc mechanism is connected with the suspension device of this embodiment, a mounting hole can be opened on the mounting plate of the upper grinding disc mechanism, and the flange 821 of the bearing sleeve 82 and the mounting plate of the upper grinding disc mechanism are fixedly connected together with bolts.

[0030] In this embodiment, a metal joint bearing is installed at the lower end of the suspension rod, an inner bearing encapsulation shell is installed on the periphery of the metal joint bearing, an outer bearing 6 is sleeved on the inner bearing encapsulation shell, and an outer bearing 6 encapsulation shell is installed on the periphery of the outer bearing 6 and the inner bearing encapsulation shell, and an upper grinding disc mechanism is fixedly connected to the outer bearing 6 encapsulation shell; the metal joint bearing is installed at the lower end of the suspension rod to increase the rotation angle of the upper grinding disc mechanism suspended on the outer bearing 6 encapsulation shell; the outer bearing 6 is arranged between the inner bearing encapsulation shell and the outer bearing 6 encapsulation shell to reduce the wear of the metal joint bearing when the suspended upper grinding disc mechanism rotates. By setting a bottom stop 23 at the bottom of the suspension rod, the metal joint bearing is limited in the vertical downward direction; by installing a stop gasket and a lower nut 27 on the suspension rod, the metal joint bearing is limited in the vertical upward direction; by opening an inwardly recessed stop groove 24 and an annular groove 25 on the suspension rod, the stop gasket is installed in the annular groove 25, and one end of the stop gasket is embedded between the stop groove 24 and the lower nut 27, the stop gasket is limited in the vertical and circumferential directions; thereby preventing the metal joint bearing from moving on the suspension rod when the upper grinding disc mechanism is working. A bearing mounting seat and a bearing pressure plate are arranged in the inner bearing packaging shell, the bearing mounting seat is sleeved on the upper end of the metal joint bearing, the bearing pressure plate is sleeved on the lower end of the metal joint bearing, and the bearing mounting seat and the bearing pressure plate are fixedly connected by bolts, so that the inner bearing packaging shell wraps the metal joint bearing inside; a bearing upper cover 81, a bearing sleeve 82 and a bearing lower cover 83 are arranged in the outer bearing 6 packaging shell, and grooves are opened on the inner sides of the top and bottom of the bearing sleeve 82, the bearing upper cover 81 is fixedly connected to the groove at the top of the bearing sleeve 82, and the bearing lower cover 83 is fixedly connected to the groove at the bottom of the bearing sleeve 82; the outer bearing 6 is sleeved on the bearing mounting seat, and the bearing sleeve 82 is sleeved on the outer bearing 6, so that the outer bearing 6 packaging shell wraps the outer bearing 6 and the inner bearing packaging shell inside; thereby, a rotation buffer structure is formed between the outer bearing 6 packaging shell and the metal joint bearing, reducing the wear of the metal joint bearing when the suspended upper grinding disc mechanism rotates.

[0031] Obviously, without departing from the principles of the present invention, several improvements or modifications made should be considered as within the protection scope of the present invention.

Claims

1. A method for hanging a grinding disc on a grinding machine, characterized in that: A metal joint bearing is installed at the lower end of the suspension rod, an inner bearing encapsulation shell is installed on the periphery of the metal joint bearing, an outer bearing is sleeved on the inner bearing encapsulation shell, and an outer bearing encapsulation shell is installed on the periphery of the outer bearing and the inner bearing encapsulation shell, and an upper grinding disc mechanism is fixedly connected to the outer bearing encapsulation shell; the metal joint bearing is installed at the lower end of the suspension rod to increase the rotation angle of the upper grinding disc mechanism suspended on the outer bearing encapsulation shell; and the outer bearing is arranged between the inner bearing encapsulation shell and the outer bearing encapsulation shell to reduce the wear of the metal joint bearing when the suspended upper grinding disc mechanism rotates.

2. The method for suspending a grinding disc on a grinding machine according to claim 1, characterized in that: By setting a bottom stop at the bottom of the suspension rod, the metal joint bearing is limited in the vertical downward direction; by installing a stop gasket and a lower nut on the suspension rod, the metal joint bearing is limited in the vertical upward direction; by opening an inwardly recessed stop groove and an annular groove on the suspension rod, the stop gasket is installed in the annular groove, and one end of the stop gasket is embedded between the stop groove and the lower nut, the stop gasket is limited in the vertical and circumferential directions; thereby preventing the metal joint bearing from moving on the suspension rod when the upper grinding disc mechanism is working.

3. The method for suspending a grinding disc on a grinding machine according to claim 2, characterized in that: A bearing mounting seat and a bearing pressure plate are arranged in the inner bearing packaging shell, the bearing mounting seat is sleeved on the upper end of the metal joint bearing, the bearing pressure plate is sleeved on the lower end of the metal joint bearing, and the bearing mounting seat and the bearing pressure plate are fixedly connected by bolts, so that the inner bearing packaging shell wraps the metal joint bearing inside; a bearing upper cover, a bearing sleeve and a bearing lower cover are arranged in the outer bearing packaging shell, and grooves are opened on the inner sides of the top and bottom of the bearing sleeve, the bearing upper cover is fixedly connected to the groove at the top of the bearing sleeve, and the bearing lower cover is fixedly connected to the groove at the bottom of the bearing sleeve; an outer bearing is sleeved on the bearing mounting seat, and a bearing sleeve is sleeved on the outer bearing, so that the outer bearing packaging shell wraps the outer bearing and the inner bearing packaging shell inside; thereby a rotation buffer structure is formed between the outer bearing packaging shell and the metal joint bearing, reducing the wear of the metal joint bearing when the suspended upper grinding disc mechanism rotates.

4. A suspension device for a grinding disc on a grinding machine, characterized in that: It includes a suspension rod, a metal joint bearing, an inner bearing packaging shell, an outer bearing and an outer bearing packaging shell, the metal joint bearing is installed at the lower end of the suspension rod, the inner bearing packaging shell is wrapped around the outer periphery of the metal joint bearing, the outer bearing is sleeved on the inner bearing packaging shell, and the outer bearing packaging shell wraps the outer bearing and the inner bearing packaging shell inside; and the upper ends of the inner bearing packaging shell and the outer bearing packaging shell are both provided with through mounting holes, and the suspension rod passes through the mounting holes and extends out of the outer bearing packaging shell.

5. The suspension device for a grinding disc on a grinding machine according to claim 4, characterized in that: The metal joint bearing includes a ball core and a sleeve, the ball core is embedded in the sleeve, and a through mounting hole is opened on the ball core; the suspension rod includes a rod body, a ring belt and a bottom stop, the ring belt is integrally formed on the rod body, and a cylindrical bottom stop is arranged at the bottom of the rod body. The ball core of the metal joint bearing is sleeved on the lower end of the suspension rod, and the bottom stop limits the metal joint bearing.

6. The suspension device for a grinding disc on a grinding machine according to claim 5, characterized in that: An upper nut and a lower nut are also installed on the rod body. The upper ends of the ring band and the rod body are both provided with external threads. The upper nut is installed on the upper end of the rod body through threaded cooperation, and the lower nut is installed on the ring band through threaded cooperation. An annular groove is also opened at the lower end of the rod body, and the annular groove is below the ring band. An inwardly recessed stop groove is also opened on the rod body, and the length direction of the stop groove is the vertical direction. A fracture is provided at the stop groove of the annular groove, and the fracture width of the annular groove is equal to the width of the stop groove.

7. The suspension device for a grinding disc on a grinding machine according to claim 6, characterized in that: It also includes a stop-retreat gasket, which includes a ring body, an outer stop plate and an inner stop plate. The ring body is in a circular ring shape, the outer stop plate is integrally formed on the outer side of the ring body, the inner stop plate is integrally formed on the inner side of the ring body, and the vertical cross-section of the inner stop plate is L-shaped; the ring body of the stop-retreat gasket is embedded in the annular groove, and the inner side of the inner stop plate of the stop-retreat gasket is embedded in the stop groove of the rod body.

8. The suspension device for a grinding disc on a grinding machine according to claim 7, characterized in that: The inner bearing packaging shell includes a bearing mounting seat and a bearing pressure plate. The bearing mounting seat includes an upper seat body and a lower seat body. Both the upper seat body and the lower seat body are rotating bodies, and the lower seat body is integrally formed at the lower end of the upper seat body; the bearing pressure plate includes a pressure ring and a bottom plate. Both the pressure ring and the bottom plate are annular, and the bottom plate is integrally formed at the lower end of the pressure ring; both the upper seat body and the bottom plate are provided with through mounting holes, and bolts pass through the mounting holes to fix the bearing mounting seat and the bearing pressure plate together, and the bearing mounting seat and the bearing pressure plate wrap the metal spherical bearing inside.

9. The suspension device for a grinding disc on a grinding machine according to claim 8, characterized in that: The outer bearing packaging shell includes a bearing upper cover, a bearing sleeve and a bearing lower cover. The inner sides of the top and bottom of the bearing sleeve are provided with grooves. The bearing upper cover is embedded in the groove at the top of the bearing sleeve, and the bearing lower cover is embedded in the groove at the bottom of the bearing sleeve. The inner side of the outer bearing is sleeved on the upper seat body, and the bearing sleeve is sleeved on the outer side of the outer bearing.

10. The suspension device for a grinding disc on a grinding machine according to claim 9, characterized in that: The bottom of the groove at the top of the bearing sleeve has an upper end surface, and the top of the groove at the bottom of the bearing sleeve has a lower end surface, and the upper end surface and the lower end surface are provided with mounting holes along the circumferential direction; the bearing upper cover and the bearing lower cover are provided with mounting holes corresponding to the mounting holes of the upper end surface and the lower end surface, and the bearing upper cover and the bearing lower cover are fixedly connected to the two ends of the bearing sleeve by passing bolts through the above-mentioned mounting holes.

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