Stone grinding machine with grinding head convenient to replace

Abstract

The invention relates to the technical field of stone grinding, and discloses a stone grinding machine with a grinding head convenient to replace, the stone grinding machine comprises a mounting plate I and a turnover mechanism, the mounting plate I is rotatably connected with a rotating shaft, the bottom of the rotating shaft is provided with a mounting disc, the top of the mounting disc is provided with a convex column, and the outer wall of the mounting disc is provided with a plurality of replacement ports at equal intervals; a rotating mechanism is arranged on the mounting disc, a plurality of pairs of first fixing plates are arranged on the rotating mechanism at equal intervals, a second fixing column is rotationally connected between each pair of first fixing plates through a torsional spring, an L-shaped overturning plate is rotationally connected to the outer wall of each second fixing column, and one end of each L-shaped overturning plate is semicircular; the other ends of the L-shaped overturning plates are fixedly connected with first fixing columns. The L-shaped overturning plates are arranged over all the replacement openings, the first grinding head or the second grinding head can be automatically replaced according to requirements, the situation of halting for disassembly and replacement in the past is completely eradicated, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of stone grinding, and particularly to a stone grinding machine that is convenient for replacing grinding heads. Background Art

[0002] In the field of stone processing, grinding and polishing are key steps to improve the surface quality and aesthetics of stones. The grinding and polishing of stones mainly rely on grinding machines. By installing a rotating grinding head (such as a grinding wheel) on the grinding machine and using the rotating grinding head running at high speed to polish the stones.

[0003] After retrieval, a patent with the Chinese patent publication number CN106564005B discloses a grinding and polishing mechanism of a stone grinding machine, including a grinding and polishing frame body, a sliding seat unit, a first lifting unit, and a grinding and polishing execution device. The grinding and polishing execution device includes a grinding head unit, a spline shaft, a main shaft box unit for installing the spline shaft, a second lifting unit for driving the spline shaft to move up and down along the main shaft box unit, and a driving unit for driving the spline shaft to rotate. The main shaft box unit and the second lifting unit are both fixedly installed on the sliding seat unit. By setting the first lifting unit to first lift and lower the entire sliding seat unit, since the first lifting unit can adopt a relatively stable screw lifting structure, an additional stroke of about 300 mm for the grinding head unit can be increased. Coupled with the original stroke of the cylinder, the grinding head unit in the entire stone grinding machine can have a stroke of 420 mm, making it fully applicable to quickly grind and polish stones with a thickness of more than 400 mm. However, when grinding stones, in order to perform more delicate grinding, the grinding head needs to be replaced. When replacing the grinding head of the above-mentioned grinding and polishing mechanism, the whole needs to be replaced, which affects the work efficiency.

[0004] In view of this, the present invention proposes a stone grinding machine that is convenient for replacing grinding heads to solve the problems existing in the above-mentioned prior art. Summary of the Invention

[0005] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose a stone grinding machine that is convenient for replacing grinding heads.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions: A stone grinding machine facilitating the replacement of grinding heads, comprising a first mounting plate and a flipping mechanism. A rotating shaft is rotatably connected to the first mounting plate, and a mounting disc is provided at the bottom of the rotating shaft. A convex column is provided on the top of the mounting disc. A plurality of replacement openings are equidistantly formed on the outer wall of the mounting disc, and a rotating mechanism is provided on the mounting disc. A plurality of pairs of first fixing plates are equidistantly arranged on the rotating mechanism, and a second fixing column is rotatably connected between each pair of first fixing plates through a torsion spring. The outer walls of the second fixing columns are rotatably connected with L-shaped flipping plates, and one end of each L-shaped flipping plate is semi-circular. The other ends of the L-shaped flipping plates are fixedly connected with first fixing columns, and one ends of the first fixing columns are fixedly connected with fixing discs. The same number of first grinding heads and second grinding heads are alternately arranged on the outer walls of the plurality of fixing discs, and the number of the first grinding heads and the second grinding heads is the same as the number of the replacement openings. The flipping mechanism is used to replace the first grinding head or the second grinding head.

[0007] Further, the flipping mechanism includes a pressing disc. A plurality of elastic telescopic columns are fixedly connected at equal distances between the outer wall of the bottom of the pressing disc and the outer wall of the top of the mounting disc. Electric push rods are provided on the outer walls of both sides of the bottom of the first mounting plate, and a first ball is provided at the telescopic end of the electric push rod. The first ball is in contact with the outer wall of the top of the pressing disc.

[0008] Further, a plurality of first connecting plates are hinged at equal distances on the outer wall of the bottom of the pressing disc, and the number of the first connecting plates is the same as the number of the replacement openings. A second fixing plate is provided on one side of each first connecting plate, and the second fixing plates are fixedly connected to the outer wall of the top of the mounting disc. A push-and-retract column is slidably connected to each second fixing plate, and a grinding head replacement claw is fixedly connected to one end of each push-and-retract column. The bottom end of the first connecting plate is hinged to the other end of the push-and-retract column.

[0009] Further, each grinding head replacement claw is located directly above the corresponding replacement opening, and the inner walls on both sides of each grinding head replacement claw are arcs with the same center of the circle. When the rotating mechanism rotates the L-shaped flipping plate, it is convenient for the semi-circular end of the L-shaped flipping plate to enter the grinding head replacement claw.

[0010] Further, the rotating mechanism includes a second mounting plate. The second mounting plate is fixed on the outer wall of the convex column of the mounting disc, and a servo motor is provided on the second mounting plate. A driving gear is provided at the output shaft end of the servo motor, and an internal gear is meshed with the outer wall of the driving gear. The internal gear is rotatably connected to the outer wall of the top of the mounting disc. A plurality of pairs of first fixing plates are equidistantly fixedly connected to the outer wall of the top of the internal gear.

[0011] Furthermore, a circular groove is formed at the top of the convex column, and a plurality of connecting grooves are arranged at equal intervals on the inner wall of the circular groove. An alignment groove is formed on one side at the top of the circular groove. A connecting cavity is arranged inside the lower part of the rotating shaft, and a plurality of telescopic openings communicating with the connecting cavity are arranged at equal intervals on the outer wall of the lower part of the rotating shaft. The number of the telescopic openings is the same as that of the connecting grooves, and connecting blocks are slidably connected inside the telescopic openings. The connecting blocks are in interference fit with the connecting grooves. An alignment block is fixedly connected to the outer wall of the lower part of the rotating shaft, and the alignment block is matched with the alignment groove.

[0012] Furthermore, a threaded rod is rotatably connected inside the connecting cavity, and a worm gear is fixedly connected to the outer wall above the threaded rod. Two mounting plates three are fixedly connected to the inner wall at the top of the connecting cavity, and a worm meshing with the worm gear is rotatably connected between the two mounting plates three. A notch is arranged on one side above the connecting cavity, and an internal hexagonal bolt is arranged at the connection between the notch and the connecting cavity. A cube-shaped long plate is slidably connected to one side of the worm close to the internal hexagonal bolt, and one end of the cube-shaped long plate is fixedly connected to one end of the internal hexagonal bolt.

[0013] Furthermore, a threaded slider is threadedly slidably connected to the outer wall of the threaded rod, and a connecting plate two is hinged between the outer wall of the threaded slider and the corresponding connecting block.

[0014] Furthermore, an arc-shaped groove is arranged on one side of each replacement opening, and an arc-shaped telescopic plate is slidably connected at the connection between the arc-shaped groove and the replacement opening. Connecting springs are fixedly connected to one end of the arc-shaped telescopic plate and the inner wall of the arc-shaped groove, and a lifting plate is fixedly connected to the other end of the arc-shaped telescopic plate. A plurality of balls two are arranged at equal intervals on the outer wall of the lifting plate.

[0015] The beneficial effects of the present invention are as follows: 1. By arranging the L-shaped flipping plate directly above each replacement opening, the present invention can automatically replace the grinding head one or the grinding head two according to requirements, eliminating the previous situation of stopping the machine for disassembly and replacement, and greatly improving the work efficiency.

[0016] 2. By arranging the connecting blocks, the present invention can conveniently and quickly insert each connecting block into the connecting groove of the mounting disc or withdraw the connecting block from the connecting groove, facilitating the installation or disassembly of the mounting disc and the subsequent maintenance work.

[0017] 3. By arranging the supporting plate, during the process of replacing the grinding head one or the grinding head two, the plurality of balls two on the supporting plate can support and fix the fixing column one, avoiding the situation of jamming caused by shaking when the internal gear drives the fixing column one to rotate. Description of the Drawings

[0018] Figure 1 Schematic structural diagram of a stone grinding machine for facilitating the replacement of grinding heads proposed in Embodiment 1; Figure 2Schematic structural diagram of the first fixing column of a stone grinding machine facilitating the replacement of grinding heads proposed in Embodiment 1; Figure 3 Schematic structural diagram of the mounting plate of a stone grinding machine facilitating the replacement of grinding heads proposed in Embodiment 1; Figure 4 Schematic diagram of the flipped state of the first fixing column of a stone grinding machine facilitating the replacement of grinding heads proposed in Embodiment 1; Figure 5 Schematic structural diagram of the mounting plate of a stone grinding machine facilitating the replacement of grinding heads proposed in Embodiment 2; Figure 6 Schematic cross-sectional structural diagram of the rotating shaft of a stone grinding machine facilitating the replacement of grinding heads proposed in Embodiment 2; Figure 7 Schematic cross-sectional structural diagram of the mounting plate of a stone grinding machine facilitating the replacement of grinding heads proposed in Embodiment 3; Figure 8 Schematic structural diagram of the lifting plate of a stone grinding machine facilitating the replacement of grinding heads proposed in Embodiment 3.

[0019] In the figure: 1, mounting plate; 2, pressing plate; 3, elastic telescopic column; 4, first mounting plate; 5, electric push rod; 6, rotating shaft; 7, first ball; 8, first fixing plate; 9, fixed disk; 10, first fixing column; 11, L-shaped flipping plate; 12, second fixing column; 13, replacement opening; 14, second fixing plate; 15, grinding head replacement claw; 16, pushing and retracting column; 17, first connecting plate; 18, servo motor; 19, second mounting plate; 20, internal gear; 21, driving gear; 22, alignment groove; 23, connecting groove; 24, circular groove; 25, threaded rod; 26, telescopic opening; 27, second connecting plate; 28, worm; 29, alignment block; 30, third mounting plate; 31, notch; 32, hexagon socket head bolt; 33, cube long plate; 34, worm gear; 35, threaded slider; 36, connecting block; 37, connecting spring; 38, arc-shaped telescopic plate; 39, arc-shaped groove; 40, second ball; 41, lifting plate. Specific embodiments

[0020] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments.

[0021] Embodiment 1: Refer to Figures 1 - 4, a stone grinding machine facilitating the replacement of grinding heads, comprising a first mounting plate 4 and a flipping mechanism. A rotating shaft 6 is rotatably connected to the first mounting plate 4, and a mounting disc 1 is provided at the bottom of the rotating shaft 6. A convex column is provided on the top of the mounting disc 1. A plurality of replacement openings 13 are equidistantly formed on the outer wall of the mounting disc 1. A rotating mechanism is provided on the mounting disc 1. A plurality of pairs of first fixing plates 8 are equidistantly arranged on the rotating mechanism. A second fixing column 12 is rotatably connected between each pair of first fixing plates 8 through a torsion spring. An L-shaped flipping plate 11 is rotatably connected to the outer wall of each second fixing column 12. One end of the L-shaped flipping plate 11 is semi-circular. A first fixing column 10 is fixedly connected to the other end of each L-shaped flipping plate 11. A fixing disc 9 is fixedly connected to one end of each first fixing column 10. A grinding head one and a grinding head two with the same quantity are alternately arranged on the outer walls of a plurality of fixing discs 9. The quantity of the grinding head one and the grinding head two is the same as that of the replacement openings 13. The flipping mechanism is used for replacing the grinding head one or the grinding head two. When it is necessary to use the grinding head one to polish the surface of the stone, the first fixing column 10 is moved through the rotating mechanism, so that the first fixing column 10 with the grinding head one moves above the replacement opening 13. Then, the flipping mechanism applies force to the L-shaped flipping plates 11 on these first fixing columns 10 to make them rotate by 90 degrees, so that the first fixing columns 10 in the horizontal state become vertical. At this time, the torsion spring deforms under force, making each grinding head one move to directly below the replacement opening 13. Then, the first mounting plate 4 is moved to make each grinding head one closely contact with the surface of the stone. Then, the mounting disc 1 below the rotating shaft 6 is rotated through an external motor, so that the mounting disc 1 drives a plurality of grinding heads one to polish the surface of the stone. If it is necessary to replace the grinding head one with the grinding head two, first stop the rotation of the mounting disc 1. Then, make each grinding head one away from the surface of the stone through the first mounting plate 4. Then, the flipping mechanism cooperates with the restoring force of the torsion spring, enabling the first fixing column 10 with the grinding head one in the vertical state to reset and become horizontal again. Then, the rotating mechanism is started to move a plurality of first fixing columns 10 with the grinding head two above the replacement opening 13, and repeat the above operations, so that the grinding head one or the grinding head two can be automatically replaced according to requirements, eliminating the previous situation of shutting down for disassembly and replacement, and greatly improving the working efficiency.

[0022] As a further scheme in the present invention, the flipping mechanism includes a pressing disc 2. A plurality of elastic telescopic columns 3 are fixedly connected at equal intervals between the outer wall of the bottom of the pressing disc 2 and the outer wall of the top of the mounting disc 1. Electric push rods 5 are arranged on the outer walls of both sides of the bottom of the first mounting plate 4. A first ball 7 is arranged at the telescopic end of the electric push rod 5. The first ball 7 contacts the outer wall of the top of the pressing disc 2.

[0023] As a further solution in the present invention, a plurality of first connecting plates 17 are hinged to the outer wall of the bottom of the pressing plate 2 at equal intervals, and the number of the first connecting plates 17 is the same as that of the replacement openings 13. A second fixing plate 14 is arranged on one side of each of the first connecting plates 17, and the second fixing plates 14 are fixedly connected to the outer wall of the top of the mounting plate 1. A push-and-retract column 16 is slidably connected to each of the second fixing plates 14, and a grinding head replacement claw 15 is fixedly connected to one end of each of the push-and-retract columns 16. The bottom end of the first connecting plate 17 is hinged to the other end of the push-and-retract column 16.

[0024] As a further solution in the present invention, each grinding head replacement claw 15 is located directly above the corresponding replacement opening 13, and the inner walls on both sides of each grinding head replacement claw 15 are arcs with the same center of the circle. When the rotating mechanism rotates the L-shaped turning plate 11, it is convenient for the semi-circular end of the L-shaped turning plate 11 to enter the grinding head replacement claw 15. Since the inner walls on both sides of each grinding head replacement claw 15 are arcs with the same center of the circle, when the rotating mechanism moves the L-shaped turning plate 11 on the first fixing column 10, the grinding head replacement claw 15 will not hinder its movement, and the L-shaped turning plate 11 can enter the grinding head replacement claw 15. When the first grinding head or the second grinding head needs to move to the lower part of the mounting plate 1, first, through the rotating mechanism, the L-shaped turning plate 11 on the corresponding first fixing column 10 is clamped into the grinding head replacement claw 15, and then the electric push rod 5 applies a force to the pressing plate 2 to make it move downward. Thus, the pressing plate 2 can make the push-and-retract columns 16 on the corresponding second fixing plates 14 move through a plurality of first connecting plates 17, so that the push-and-retract columns 16 push the grinding head replacement claws 15 away from the second fixing plates 14. Thus, through the L-shaped turning plate 11, the corresponding first fixing column 10 can drive the first grinding head or the second grinding head to move to the lower part of the mounting plate 1, and the first fixing column 10 is in a vertical state. At this time, the bottom of the grinding head replacement claw 15 contacts the outer wall of the L-shaped turning plate 11, and can limit its position.

[0025] As a further solution in the present invention, the rotating mechanism includes a second mounting plate 19, the second mounting plate 19 is fixed on the outer wall of the convex column of the mounting plate 1, and a servo motor 18 is arranged on the second mounting plate 19. A driving gear 21 is arranged at the output shaft end of the servo motor 18, and an internal gear 20 is meshed with the outer wall of the driving gear 21. The internal gear 20 is rotatably connected to the outer wall of the top of the mounting plate 1. A plurality of pairs of first fixing plates 8 are fixedly connected to the outer wall of the top of the internal gear 20 at equal intervals. The servo motor 18 drives the driving gear 21 to rotate. Since the driving gear 21 is meshed with the internal gear 20, the internal gear 20 can drive a plurality of first fixing plates 8 on its outer wall to rotate.

[0026] Working principle: When it is necessary to use the first grinding head to polish the surface of the stone, the fixing column 10 is moved through the rotating mechanism, so that the fixing column 10 with the first grinding head moves above the replacement port 13. Then, the flipping mechanism applies force to the L-shaped flipping plates 11 on these fixing columns 10 to make them rotate by 90 degrees, so that the fixing column 10 in the horizontal state becomes vertical. At this time, the torsion spring is deformed by force, so that each first grinding head moves to directly below the replacement port 13. Then, the mounting plate 4 is moved to make each first grinding head closely contact the stone surface. Then, the external motor is used to rotate the mounting disc 1 below the rotating shaft 6, so that the mounting disc 1 drives multiple first grinding heads to polish the stone surface. If it is necessary to replace the first grinding head with the second grinding head, first stop the rotation of the mounting disc 1, then move each first grinding head away from the stone surface through the mounting plate 4. Then, the flipping mechanism and the resilience of the torsion spring cooperate to enable the fixing column 10 with the first grinding head in the vertical state to reset and become horizontal again. Then, the rotating mechanism is started to move multiple fixing columns 10 with the second grinding head above the replacement port 13, and the above operations are repeated, so that the first grinding head or the second grinding head can be automatically replaced according to requirements, eliminating the previous situation of shutting down for disassembly and replacement, and greatly improving work efficiency.

[0027] Embodiment 2: Refer to Figures 5 - 6 , a stone grinding machine convenient for replacing grinding heads. Compared with Embodiment 1, on the basis of Embodiment 1, as a further scheme in the present invention, a circular groove 24 is opened at the top of the convex column, and a plurality of connecting grooves 23 are equidistantly arranged on the inner wall of the circular groove 24. An alignment groove 22 is opened on one side of the top of the circular groove 24. A connecting cavity is arranged inside the lower part of the rotating shaft 6, and a plurality of expansion ports 26 communicating with the connecting cavity are equidistantly opened on the outer wall of the lower part of the rotating shaft 6. The number of expansion ports 26 is the same as the number of connecting grooves 23, and connecting blocks 36 are slidably connected inside the expansion ports 26. The connecting blocks 36 are in interference fit with the connecting grooves 23. A alignment block 29 is fixedly connected to the outer wall of the lower part of the rotating shaft 6, and the alignment block 29 is matched with the alignment groove 22. When it is necessary to connect the mounting disc 1 and the rotating shaft 6, the lower end of the rotating shaft 6 is inserted into the circular groove 24 of the convex column at the top of the mounting disc 1, and the alignment block 29 is embedded into the alignment groove 22. At this time, each expansion port 26 of the rotating shaft 6 will be aligned with each connecting groove 23 in the circular groove 24.

[0028] As a further solution in the present invention, a threaded rod 25 is rotatably connected inside the connection cavity, and a worm gear 34 is fixedly connected to the outer wall above the threaded rod 25. Two third mounting plates 30 are fixedly connected to the top inner wall of the connection cavity, and a worm 28 meshing with the worm gear 34 is rotatably connected between the two third mounting plates 30. A notch 31 is provided on one side above the connection cavity, and an internal hexagonal bolt 32 is provided at the connection between the notch 31 and the connection cavity. A square long plate 33 is slidably connected to the side of the worm 28 close to the internal hexagonal bolt 32, and one side of the square long plate 33 is fixedly connected to one end of the internal hexagonal bolt 32. Then, an external tool is used to rotate the internal hexagonal bolt 32 so that the internal hexagonal bolt 32 is screwed into the notch 31. Since the square long plate 33 fixed to one end of the internal hexagonal bolt 32 is slidably connected to the worm 28, when the internal hexagonal bolt 32 is screwed into the notch 31, the square long plate 33 will be rotated synchronously, and the square long plate 33 will be pushed into the worm 28, thereby enabling the worm 28 to rotate. Since the worm 28 meshes with the worm gear 34 on the threaded rod 25, the threaded rod 25 rotates.

[0029] As a further solution in the present invention, a threaded slider 35 is threadedly and slidably connected to the outer wall of the threaded rod 25, and a second connecting plate 27 is hinged between the outer wall of the threaded slider 35 and the corresponding connecting block 36. It can make the threaded slider 35 on its outer wall move downward, so that each connecting block 36 enters the connecting groove 23 through the second connecting plate 27, completing the docking and fixing work of the rotating shaft 6 and the mounting disc 1. When it is necessary to disassemble the rotating shaft 6 and the mounting disc 1, the external tool is used again to rotate the internal hexagonal bolt 32 inside the notch 31 (the rotation direction is opposite to that before), so that the internal hexagonal bolt 32 will move away from the inner wall of the notch 31 and move the internal hexagonal bolt 32 out of the notch 31. During this process, the internal hexagonal bolt 32 will rotate the square long plate 33 synchronously (the rotation direction is opposite to that before), enabling the worm 28 to rotate (the rotation direction is opposite to that before), so that the threaded slider 35 on the threaded rod 25 moves upward. Through each second connecting plate 27, the connecting block 36 inserted into the connecting groove 23 can be pulled, so that it is pushed out of the connecting groove 23 and retracted into the telescopic opening 26, separating the convex column above the mounting disc 1 from the rotating shaft 6, completing the disassembly work of the mounting disc 1 and the rotating shaft 6. It is simple and convenient, and the internal hexagonal bolt 32 has a self-locking function, avoiding loosening and detachment between the mounting disc 1 and the rotating shaft 6 during work.

[0030] Working principle: When it is necessary to connect the mounting disk 1 with the rotating shaft 6, insert the lower end of the rotating shaft 6 into the circular groove 24 of the convex column at the top of the mounting disk 1, and make the alignment block 29 embed into the alignment groove 22. At this time, each telescopic port 26 of the rotating shaft 6 will align with each connection groove 23 in the circular groove 24. Then, use an external tool to rotate the hexagon socket head bolt 32 so that the hexagon socket head bolt 32 screws into the notch 31. Since the cube-shaped long plate 33 fixed at one end of the hexagon socket head bolt 32 is slidably connected with the worm 28, when the hexagon socket head bolt 32 screws into the notch 31, it will drive the cube-shaped long plate 33 to rotate synchronously and push the cube-shaped long plate 33 into the worm 28, so that the worm 28 can rotate. Since the worm 28 meshes with the worm gear 34 on the threaded rod 25, the threaded rod 25 rotates, and the threaded slider 35 on its outer wall can move downward. Then, through the second connecting plate 27, each connecting block 36 enters the connection groove 23, completing the docking and fixing work of the rotating shaft 6 and the mounting disk 1. When it is necessary to disassemble the rotating shaft 6 and the mounting disk 1, use an external tool to rotate the hexagon socket head bolt 32 inside the notch 31 again (the rotation direction is opposite to the previous one). Thus, the hexagon socket head bolt 32 will move away from the inner wall of the notch 31 and move outward from the notch 31. During this process, the hexagon socket head bolt 32 will make the cube-shaped long plate 33 rotate synchronously (the rotation direction is opposite to the previous one), enabling the worm 28 to rotate (the rotation direction is opposite to the previous one). As a result, the threaded slider 35 on the threaded rod 25 moves upward. Through each second connecting plate 27, the connecting block 36 inserted into the connection groove 23 can be pulled, so that it is pushed out of the connection groove 23 and retracted into the telescopic port 26, separating the convex column above the rotating shaft 6 and the mounting disk 1, completing the disassembly work of the mounting disk 1 and the rotating shaft 6. It is simple and convenient, and the hexagon socket head bolt 32 has a self-locking function to prevent loosening and detachment between the mounting disk 1 and the rotating shaft 6 during operation.

[0031] Embodiment 3: Refer to Figures 7 - 8, a stone grinding machine facilitating the replacement of grinding heads. Compared with Embodiment 2, on the basis of Embodiment 2, an arc-shaped groove 39 is provided on one side of each replacement opening 13, and an arc-shaped telescopic plate 38 is slidably connected to the connection part between the arc-shaped groove 39 and the replacement opening 13. One end of the arc-shaped telescopic plate 38 and the inner wall of the arc-shaped groove 39 are fixedly connected with a connecting spring 37, and the other end of the arc-shaped telescopic plate 38 is fixedly connected with a lifting plate 41. A plurality of second balls 40 are equidistantly arranged on the outer wall of the lifting plate 41. Under the action of the connecting spring 37, the arc-shaped telescopic plate 38 extends out of the arc-shaped groove 39, enabling the surface of the second balls 40 on the lifting plate 41 to be flush with the top surface of the mounting plate 1. Thus, the second balls 40 can contact the outer wall of the first fixing column 10. During the process of the turning mechanism making the first fixing column 10 become vertical, the first fixing column 10 can make the arc-shaped telescopic plate 38 retract into the arc-shaped groove 39 through the lifting plate 41. When the first fixing column 10 becomes vertical, the lifting plate 41 can contact the inner wall of the replacement opening 13. The lifting plate 41 and the second balls 40 on its surface can fill the gap between the first fixing column 10 and the replacement opening 13, and through cooperation with the grinding head replacement claw 15, limit it to avoid shaking during grinding; and when replacing the grinding head and making the vertical first fixing column 10 become horizontal, the second balls 40 on the lifting plate 41 can lift the first fixing column 10, making the first fixing column 10 above the mounting plate 1 to avoid the situation of jamming when the rotating mechanism drives it to rotate.

[0032] Working principle: Under the action of the connecting spring 37, the arc-shaped telescopic plate 38 extends out of the arc-shaped groove 39, enabling the surface of the second balls 40 on the lifting plate 41 to be flush with the top surface of the mounting plate 1. Thus, the second balls 40 can contact the outer wall of the first fixing column 10. During the process of the turning mechanism making the first fixing column 10 become vertical, the first fixing column 10 can make the arc-shaped telescopic plate 38 retract into the arc-shaped groove 39 through the lifting plate 41. When the first fixing column 10 becomes vertical, the lifting plate 41 can contact the inner wall of the replacement opening 13. The lifting plate 41 and the second balls 40 on its surface can fill the gap between the first fixing column 10 and the replacement opening 13, and through cooperation with the grinding head replacement claw 15, limit it to avoid shaking during grinding; and when replacing the grinding head and making the vertical first fixing column 10 become horizontal, the second balls 40 on the lifting plate 41 can lift the first fixing column 10, making the first fixing column 10 above the mounting plate 1 to avoid the situation of jamming when the rotating mechanism drives it to rotate.

[0033] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and should be covered within the protection scope of the present invention.

Claims

1. A stone grinding machine facilitating the replacement of a grinding head, comprising a first mounting plate (4) and a flipping mechanism. A rotating shaft (6) is rotatably connected to the first mounting plate (4), and a mounting disc (1) is provided at the bottom of the rotating shaft (6). A convex column is provided on the top of the mounting disc (1), characterized in that, The outer wall of the mounting disc (1) is provided with a plurality of replacement openings (13) at equal distances, and a rotating mechanism is arranged on the mounting disc (1). A plurality of pairs of first fixing plates (8) are arranged at equal distances on the rotating mechanism, and a second fixing column (12) is rotatably connected between each pair of first fixing plates (8) through a torsion spring. The outer walls of the second fixing columns (12) are rotatably connected with L-shaped turning plates (11), and one end of each L-shaped turning plate (11) is semicircular. The other ends of the L-shaped turning plates (11) are fixedly connected with first fixing columns (10), and one ends of the first fixing columns (10) are fixedly connected with fixing discs (9). The outer walls of the plurality of fixing discs (9) are alternately provided with the same number of first grinding heads and second grinding heads, and the numbers of the first grinding heads and the second grinding heads are the same as the number of the replacement openings (13). The turning mechanism is used to replace the first grinding head or the second grinding head; The turning mechanism includes a pressing disc (2). A plurality of elastic telescopic columns (3) are fixedly connected at equal distances between the bottom outer wall of the pressing disc (2) and the top outer wall of the mounting disc (1). Electric push rods (5) are arranged on the outer walls of both sides of the bottom of the first mounting plate (4), and a first ball (7) is arranged at the telescopic end of the electric push rod (5). The first ball (7) contacts the top outer wall of the pressing disc (2); A plurality of first connecting plates (17) are hinged at equal distances on the bottom outer wall of the pressing disc (2), and the number of the first connecting plates (17) is the same as the number of the replacement openings (13). Second fixing plates (14) are arranged on one side of each first connecting plate (17), and the second fixing plates (14) are fixedly connected to the top outer wall of the mounting disc (1). Push-pull columns (16) are slidably connected to the second fixing plates (14), and grinding head replacement claws (15) are fixedly connected to one ends of the push-pull columns (16). The bottom ends of the first connecting plates (17) are hinged to the other ends of the push-pull columns (16).

2. The stone grinding machine for facilitating the replacement of a grinding head according to claim 1, wherein, Each grinding head replacement claw (15) is located directly above the corresponding replacement opening (13), and the inner walls on both sides of each grinding head replacement claw (15) are arcs with the same center of the circle. When the rotating mechanism rotates the L-shaped turning plate (11), it is convenient for the semicircular end of the L-shaped turning plate (11) to enter the grinding head replacement claw (15).

3. The stone grinding machine for facilitating the replacement of a grinding head according to claim 1, wherein, The rotating mechanism includes a second mounting plate (19). The second mounting plate (19) is fixed on the outer wall of the convex column of the mounting disc (1), and a servo motor (18) is arranged on the second mounting plate (19). A driving gear (21) is arranged at the output shaft end of the servo motor (18), and an internal gear (20) is meshed with the outer wall of the driving gear (21). The internal gear (20) is rotatably connected to the top outer wall of the mounting disc (1). A plurality of pairs of first fixing plates (8) are fixedly connected to the top outer wall of the internal gear (20) at equal distances.

4. A stone grinding machine facilitating the replacement of a grinding head according to claim 1, characterized in that, A circular groove (24) is provided at the top of the convex post, and a plurality of connecting grooves (23) are equidistantly arranged on the inner wall of the circular groove (24). An alignment groove (22) is provided on one side of the top of the circular groove (24). A connecting cavity is provided inside the lower part of the rotating shaft (6), and a plurality of telescopic openings (26) communicating with the connecting cavity are equidistantly opened on the outer wall of the lower part of the rotating shaft (6). The number of the telescopic openings (26) is the same as the number of the connecting grooves (23), and connecting blocks (36) are slidably connected inside the telescopic openings (26). The connecting blocks (36) are in interference fit with the connecting grooves (23). An alignment block (29) is fixedly connected to the outer wall of the lower part of the rotating shaft (6), and the alignment block (29) is matched with the alignment groove (22).

5. The stone grinding machine for facilitating the replacement of a grinding head according to claim 4, wherein A threaded rod (25) is rotatably connected inside the connecting cavity, and a worm gear (34) is fixedly connected to the outer wall of the upper part of the threaded rod (25). Two mounting plates three (30) are fixedly connected to the inner wall of the top of the connecting cavity, and a worm (28) meshing with the worm gear (34) is rotatably connected between the two mounting plates three (30). A notch (31) is provided on one side of the upper part of the connecting cavity, and an internal hexagonal bolt (32) is provided at the connection between the notch (31) and the connecting cavity. A cube-shaped long plate (33) is slidably connected to one side of the worm (28) close to the internal hexagonal bolt (32), and one end of the cube-shaped long plate (33) is fixedly connected to one end of the internal hexagonal bolt (32).

6. The stone grinding machine for facilitating the replacement of a grinding head according to claim 5, wherein A threaded slider (35) is threadedly slidably connected to the outer wall of the threaded rod (25), and a connecting plate two (27) is hinged between the outer wall of the threaded slider (35) and the corresponding connecting block (36).

7. A stone grinding machine facilitating the replacement of a grinding head according to claim 1, characterized in that, An arc-shaped groove (39) is provided on one side of each replacement opening (13), and an arc-shaped telescopic plate (38) is slidably connected at the connection between the arc-shaped groove (39) and the replacement opening (13). Connecting springs (37) are fixedly connected to one end of the arc-shaped telescopic plate (38) and the inner wall of the arc-shaped groove (39), and a lifting plate (41) is fixedly connected to the other end of the arc-shaped telescopic plate (38). A plurality of balls two (40) are equidistantly arranged on the outer wall of the lifting plate (41).

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