CN211414786U - Can realize automatic equipment of polishing of changing three kinds of model abrasive material discs - Google Patents

Abstract

The utility model discloses a polishing device capable of automatically replacing three types of abrasive discs, which comprises a motor base, a polishing driving motor, a rotating main disc and a material replacing bearing disc, the rotary main disc comprises a main disc body and a hollow connecting shaft, the main disc body is provided with a fan-shaped hole, the hollow connecting shaft is provided with three strip-shaped holes, six rectangular bulges and six cylindrical bulges vertically corresponding to the rectangular bulges, a rotating part is formed between each rectangular bulge and each cylindrical bulge, the main disc body is provided with a first abrasive disc, the material changing bearing disc extends to form six inclined blocks, the top surfaces of the inclined blocks are inclined planes, the material changing bearing disc is elastically connected with a second abrasive disc, the material changing driving cylinder is positioned in the hollow connecting shaft, the material changing driving cylinder is connected with a central lifting shaft, and the elastic pressing assembly is sleeved on the hollow connecting shaft; the utility model discloses can realize changing three kinds of model abrasive material dishes automatically, improve the efficiency of polishing, do benefit to automated production.

Description

Can realize automatic equipment of polishing of changing three kinds of model abrasive material discs

Technical Field

The utility model relates to an equipment technical field that polishes especially relates to an equipment of polishing that can realize automatic change three kinds of model abrasive discs.

Background

When the part surface is polished, need artifical dismantlement to change three kinds of different model abrasive discs sometimes and accomplish whole work of polishing, so lead to polishing efficiency very low, be unfavorable for automated production.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above shortcoming, provide an equipment of polishing that can realize automatic change three kinds of model abrasive material discs.

In order to achieve the above purpose, the specific scheme of the utility model is as follows:

a polishing device capable of automatically replacing three types of abrasive discs comprises a motor base, a polishing driving motor, a rotating main disc, a material changing bearing disc, an elastic pressing assembly, a material changing driving cylinder and a funnel protective cover; the rotary main disc comprises a main disc body and a hollow connecting shaft, the lower end of the hollow connecting shaft is fixedly connected to the middle of the main disc body, three fan-shaped holes are formed in the main disc body at equal intervals, a driven gear is arranged at the upper end of the hollow connecting shaft in a fixed sleeve mode, three strip-shaped holes, six rectangular bulges and six cylinder bulges corresponding to the rectangular bulges from top to bottom are formed in the circumferential wall of the lower end of the hollow connecting shaft at intervals, a rotating part is formed between each rectangular bulge and each cylinder bulge, each strip-shaped hole is located between every two adjacent rectangular bulges, three fan-shaped first abrasive discs are arranged on the main disc body at intervals, the first abrasive discs and the fan-shaped holes are arranged alternately, each rectangular bulge is used for limiting the material changing bearing disc to rotate relative to the rotary main disc, and each cylinder bulge is used for enabling the material changing bearing disc to, the rotating part is used for providing a rotating space for the reloading bearing disc to rotate relative to the rotating main disc; the discharge spout end of the funnel protective cover is connected with the other end of the hollow connecting shaft through a first bearing, and the opening end of the funnel protective cover is matched with the outer wall of the main disc body; the motor base is fixed on the discharge spout end of the funnel protection cover, the polishing driving motor is fixed on the motor base, the output end of the polishing driving motor extends into the motor base and is connected with a driving gear, and the driving gear is meshed with a driven gear; the material changing bearing disc is sleeved on the hollow connecting shaft, six inclined blocks extend upwards at intervals from the material changing bearing disc, the inner side surfaces of the inclined blocks are attached to the outer circumferential wall of the hollow connecting shaft, the top surfaces of the inclined blocks are inclined surfaces, six fan-shaped second abrasive discs are arranged on the bottom surface of the material changing bearing disc at equal intervals, and the second abrasive discs are elastically connected with the material changing bearing disc; the disc changer comprises a hollow connecting shaft, a motor base, a material changing driving cylinder, a central lifting shaft, a material changing driving cylinder, a first connecting rod, a second bearing, a central lifting shaft and a central lifting shaft, wherein the material changing driving cylinder is arranged in the hollow connecting shaft and fixedly connected with the motor base through a pin shaft; the elastic pressing assembly is sleeved on the hollow connecting shaft and used for keeping the pressing force to act on the inclined block of the reloading bearing disc.

The elastic pressing assembly comprises a circular ring blocking piece, a pressure spring and a circular ring pressing claw, the pressure spring is located between the circular ring blocking piece and the circular ring pressing claw, and the free end of the circular ring pressing claw abuts against the inclined block under the action of the pressure spring.

The first abrasive disc comprises a first shock pad and a first abrasive block, the first shock pad is fixed on the main disc body, and the first abrasive block is correspondingly fixed on the first shock pad.

Wherein, the second abrasive material dish includes sliding block, second shock pad and second abrasive material piece, the sliding block upwards the interval extends has the traveller, the upper end of traveller passes the reloading and bears the dish to the top surface of activity restriction at the reloading bears the dish, every all the cover is equipped with reset spring on the traveller, reset spring's both ends bear the dish top with the sliding block and reloading respectively and lean on, the second shock pad correspondence is fixed on the sliding block, second abrasive material piece correspondence is fixed on the second shock pad.

Wherein, funnel protection casing and reloading bear and are formed with the suction chamber between the dish, be equipped with vacuum nozzle on the funnel protection casing, vacuum nozzle and suction chamber intercommunication, the reloading bears the interval and is equipped with a plurality of round holes on the dish, the main disc body all is equipped with a plurality of dust absorption holes along radial interval in the both sides that are located first abrasive material dish, the dust absorption hole passes through round hole and suction chamber intercommunication.

The utility model has the advantages that: compared with the prior art, the utility model discloses a reloading drives lifting action of actuating cylinder, elasticity pushes down subassembly and six bellied combined action of cylinder, it is rotatory to make reloading bear the owner's dish and can rotate relatively, reach the purpose of switching second abrasive material dish, three sector hole is seted up at the interval on the owner's body of rotatory owner's dish simultaneously, make six second abrasive material dishes divide into two sets ofly and can pass the sector hole in proper order, only need alternate two kinds of different model abrasive material dishes of installation on six second abrasive material dishes, can realize the automatic change of three kinds of model abrasive material dishes, need not the artifical abrasive material dish of dismantling, the efficiency of polishing is greatly improved, the production efficiency is improved, do benefit to automated production.

Additionally, the utility model discloses can accomplish polishing to the part surface, can carry out cleaing away of piece and powder simultaneously again, avoid piece and powder influence effect of polishing, and need not additionally to increase and clear away equipment and clear up piece and powder, practice thrift the manufacturing cost of polishing greatly.

Drawings

Fig. 1 is a perspective view of a polishing apparatus provided in an embodiment of the present invention;

fig. 2 is a top view of a polishing apparatus provided by an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;

fig. 5 is a bottom view of a polishing apparatus provided by an embodiment of the present invention;

fig. 6 is a schematic view of a partial structure of a polishing apparatus provided in an embodiment of the present invention;

FIG. 7 is a schematic view of a reload carrier tray in accordance with an embodiment of the present invention in combination with a second abrasive disc;

FIG. 8 is a schematic view of an alternative perspective of the present invention showing the engagement of a refill carrier tray with a second abrasive disc;

fig. 9 is an exploded view of a grinding driving motor, a first connecting rod, a second connecting rod and a central pulling shaft according to an embodiment of the present invention;

fig. 10 is an exploded view of a resilient hold-down assembly provided by an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a rotating main disk according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of another view angle of the rotating main disc provided in the embodiment of the present invention;

fig. 13 is a schematic structural view of a reloading tray according to an embodiment of the present invention;

fig. 14 is a schematic structural view of another view angle of a material changing carrier tray according to an embodiment of the present invention;

fig. 15 is a schematic view of a second abrasive disc according to an embodiment of the present invention;

fig. 16 is a schematic view of a first abrasive disc according to an embodiment of the present invention;

description of reference numerals: 1-a motor base; 2-polishing the driving motor; 3-rotating the main disc; 31-a main disc body; 311-dust suction holes; 32-a hollow connecting shaft; 321-a rotating part; 33-sector holes; 34-a strip-shaped hole; 35-rectangular protrusion; 36-a cylindrical projection; 4-changing the material bearing disc; 41-oblique block; 42-round hole; 5-elastic pressing component; 51-a circular baffle plate; 52-pressure spring; 53-circular pressing claw; 6-refueling driving cylinder; 7-a funnel shield; 8-a driven gear; 9-a first abrasive disc; 91-a first cushion; 92-a first abrasive block; 10-a first bearing; 20-a drive gear; 30-a second abrasive disc; 301-a slider; 3011-a traveller; 302-a second shock pad; 303-a second abrasive mass; 304-a return spring; 40-a pin shaft; 50-a first connecting rod; 60-a second bearing; 70-a second connecting rod; 80-a central pull shaft; 801-lifting bar; 90-dust suction chamber.

Detailed Description

The following detailed description of the present invention, taken in conjunction with the accompanying drawings and specific examples, is not intended to limit the scope of the invention.

As shown in fig. 1 to 16, the polishing apparatus capable of automatically replacing three types of abrasive discs according to this embodiment includes a motor base 1, a polishing driving motor 2, a rotating main disc 3, a material changing carrier disc 4, an elastic pressing assembly 5, a material changing driving cylinder 6, and a hopper protection cover 7; rotatory master 3 includes master body 31 and hollow connecting axle 32, the lower extreme fixed connection of hollow connecting axle 32 is at the middle part of master body 31, equidistant three fan-shaped hole 33 that is equipped with on master body 31, the fixed cover in upper end of hollow connecting axle 32 is equipped with driven gear 8, the interval is equipped with three bar hole 34, six rectangle arch 35 and six and the protruding 35 cylinder arch 36 that corresponds from top to bottom of rectangle on the circumference wall of the lower extreme of hollow connecting axle 32, be formed with rotation portion 321 between rectangle arch 35 and the cylinder arch 36, bar hole 34 is located between two adjacent rectangle arch 35, the interval is equipped with the first abrasive disc 9 of three fan-shaped on master body 31, first abrasive disc 9 sets up with fan-shaped hole 33 is alternate, rectangle arch 35 is used for restricting the rotatory master 3 rotation of the relative of reloading carrier disc 4, the cylindrical protrusions 36 are used for enabling the material changing carrier disc 4 to rotate relative to the rotating main disc 3, and the rotating part 321 is used for providing a rotating space for the material changing carrier disc 4 to rotate relative to the rotating main disc 3; the discharge spout end of the funnel protection cover 7 is connected with the other end of the hollow connecting shaft 32 through two first bearings 10, and the opening end of the funnel protection cover 7 is matched with the outer wall of the main disc body 31; the motor base 1 is fixed on the discharge spout end of the funnel protection cover 7, the polishing driving motor 2 is fixed on the motor base 1, the output end of the polishing driving motor 2 extends into the motor base 1 and is connected with a driving gear 20, and the driving gear 20 is meshed with the driven gear 8; the material changing bearing disc 4 is sleeved on the hollow connecting shaft 32, six inclined blocks 41 extend upwards from the material changing bearing disc 4 at intervals, the inner side surfaces of the inclined blocks 41 are attached to the outer circumferential wall of the hollow connecting shaft 32, the top surfaces of the inclined blocks 41 are inclined surfaces, six fan-shaped second abrasive discs 30 are arranged on the bottom surface of the material changing bearing disc 4 at equal intervals, and the second abrasive discs 30 are elastically connected with the material changing bearing disc 4; the material changing driving cylinder 6 is arranged in the hollow connecting shaft 32, the material changing driving cylinder 6 is fixedly connected with the motor base 1 through a pin shaft 40, a piston rod of the material changing driving cylinder 6 is connected with a first connecting rod 50, the other end of the first connecting rod 50 is connected with a second connecting rod 70 through a second bearing 60, the other end of the second connecting rod 70 is connected with a central lifting shaft 80, the central lifting shaft 80 is radially extended with three lifting rods 801 corresponding to the three strip-shaped holes 34, preferably, a step is arranged at the free end of each lifting rod 801 so that the second abrasive disc 30 can fully extend out, and when disc changing is needed, the material changing driving cylinder 6 drives the material changing bearing disc 4 to ascend through the central lifting shaft 80; the elastic pressing component 5 is sleeved on the hollow connecting shaft 32 and used for keeping the pressing force acting on the inclined block 41 of the reloading bearing plate 4.

Specifically, in the embodiment, the first abrasive disc 9 is set as a model I abrasive disc, three of the second abrasive discs 30 are set as a model II abrasive disc, the other three second abrasive discs 30 are set as model III abrasive discs, the model II abrasive discs and the model III abrasive discs are arranged alternately, the distance between two adjacent oblique blocks 41 is equal to the width of the rectangular protrusion 35, and the three types of grinding sequences are set as the model I abrasive disc, the model II abrasive disc and the model III abrasive disc in sequence;

in an initial state, the material changing bearing disc 4 is sleeved on the hollow connecting shaft 32, under the action of the elastic pressing component 5, the material changing bearing disc 4 slides into the lower end of the hollow connecting shaft 32, the six rectangular protrusions 35 on the hollow connecting shaft 32 are respectively and correspondingly embedded between the two adjacent inclined blocks 41, at the moment, a piston rod of the material changing driving cylinder 6 is in an extending state, the material changing bearing disc 4 is limited by the six rectangular protrusions 35 and cannot rotate relative to the hollow connecting shaft 32, three type II abrasive discs correspondingly penetrate through the three fan-shaped holes 33, the heights of the three type II abrasive discs are lower than those of the three type I abrasive discs, and the three type III abrasive discs are located between the main disc body 31 and the material changing bearing disc 4;

when the type I abrasive discs are used, a piston rod of the material changing driving cylinder 6 drives the central lifting shaft 80 to ascend through the first connecting rod 50 and the second connecting rod 70, the lifting rod 801 on the central lifting shaft 80 supports the material changing bearing discs 4 and drives the material changing bearing discs 4 to ascend for a certain distance by overcoming the pressure of the elastic pressing component 5, so that the heights of the three type II abrasive discs are higher than those of the three type I abrasive discs, but the six rectangular bulges 35 can still limit the material changing bearing discs 4 to move relatively, then the grinding driving motor 2 drives the driving gear 20 to rotate, the driving gear 20 drives the driven gear 8 to rotate, the driven gear 8 drives the rotating main disc 3 to rotate, so that the type I abrasive discs are driven to rotate, the surfaces of parts are ground, and the material changing bearing discs 4 are certainly driven to rotate;

when type II abrasive discs are required to be used, a piston rod of the material changing driving cylinder 6 drives the central pull-up shaft 80 to extend downwards, the material changing bearing discs 4 extend downwards under the action of the dead weight and the elastic pressing component 5, three type II abrasive discs corresponding to the three fan-shaped holes 33 respectively and correspondingly penetrate the fan-shaped holes 33 and extend downwards, the heights of the three type II abrasive discs are lower than those of the three type I abrasive discs, the three type II abrasive discs keep the extending state under the action of the downward pressure of the elastic pressing component 5, the six rectangular bulges 35 on the hollow connecting shaft 32 are correspondingly clamped between the two adjacent inclined blocks 41 to limit the relative movement of the material changing bearing discs 4, the hollow connecting shaft 32 and the material changing bearing discs 4 are clamped together, at the moment, the three type III abrasive discs are positioned between the main disc body 31 and the material changing bearing discs 4, and then under the driving of the grinding driving motor 2, the rotating main disc 3 rotates, the rotating main disc 3 drives the material changing bearing disc 4 to rotate, and the material changing bearing disc 4 drives the type II abrasive disc to polish the surface of a part, so that the disc changing action for the first time is realized;

when a type III abrasive disc needs to be used, the piston rod of the material changing driving cylinder 6 drives the central lifting shaft 80 to ascend, the central lifting shaft 80 drives the material changing bearing disc 4 to ascend by overcoming the downward pressure of the elastic pressing component 5 through the three lifting rods 801, the material changing bearing disc 4 is separated from the six rectangular bulges 35 and ascends to the rotating part 321 of the hollow connecting shaft 32, namely, the material changing bearing disc 4 is not limited by the rectangular bulges 35 at the moment, due to the guiding action of the elastic pressing component 5, the six inclined blocks 41 on the material changing bearing disc 4 respectively and correspondingly ascend to the lower parts of the six cylindrical bulges 36, namely, one ends of the inclined surfaces of the six inclined blocks 41 are respectively and correspondingly contacted with the six cylindrical bulges 36, under the continuous driving of the material changing driving cylinder 6, the material changing bearing disc 4 rotates by one unit radian under the action of the six cylindrical bulges 36, then the material changing driving cylinder 6 drives the central lifting shaft 80 to descend, meanwhile, the material changing bearing disc 4 descends under the action of the dead weight and the elastic pressing component 5, then the material changing driving cylinder 6 drives the material changing bearing disc 4 to ascend again, the material changing bearing disc 4 rotates by one unit radian again, the actions are repeated until three type III abrasive discs correspond to three fan-shaped holes 33 respectively, then the material changing bearing disc 4 descends under the action of the material changing driving cylinder 6 and the elastic pressing component 5, the type III abrasive discs penetrate through the fan-shaped holes 33 and extend out, six rectangular bulges 35 are clamped between two adjacent inclined blocks 41 respectively again, the material changing bearing disc 4 is prevented from moving relatively, the height of the type III abrasive discs is lower than that of the type I abrasive discs, at the moment, the three type II abrasive discs are positioned between the main disc body 31 and the material changing bearing disc 4, and then the surfaces of the parts are polished by the three type III abrasive discs under the driving of the polishing driving motor 2, finishing the second disc changing action;

when using model II abrasive disc or model III abrasive disc, because second abrasive disc 30 and the material changing bear dish 4 elastic connection, consequently, the model II or the model III abrasive disc that corresponds with three fan-shaped hole 33 can pass fan-shaped hole 33 back and keep stretching out the state, and model III or the model II abrasive disc that does not correspond with three fan-shaped hole 33 then under the extrusion of main dish body 31 and material changing bear dish 4, shrink between main dish body 31 and material changing bear dish 4 to the realization uses the abrasive disc of one of them model, realizes the purpose of changing the dish.

This embodiment is through the action of drawing of reloading drive actuating cylinder 6, the combined action of elasticity push down subassembly 5 and six cylinder arch 36, it is rotatory to make reloading bear dish 4 can relative rotation owner dish 3, reach the purpose of switching second abrasive material dish 30, three sector hole 33 is seted up at the interval on the owner dish body 31 of rotatory owner dish 3 simultaneously, make six second abrasive material dishes 30 divide into two sets ofly can pass sector hole 33 in proper order, only need install two kinds of different model abrasive material dishes in the interval on six second abrasive material dishes 30, can realize the automatic change of three kinds of model abrasive material dishes, need not the manual work and dismantle the abrasive material dish, the efficiency of polishing is greatly improved, the production efficiency is improved, do benefit to automated production.

Based on the above embodiment, further, as shown in fig. 15, the elastic pressing-down assembly 5 includes a circular ring blocking piece 51, a pressure spring 52 and a circular ring pressing-down claw 53, the pressure spring 52 is located between the circular ring blocking piece 51 and the circular ring pressing-down claw 53, and a free end of the circular ring pressing-down claw 53 abuts against the inclined block 41 under the action of the pressure spring 52; preferably, the free end of the annular pressing claw 53 is provided with a pressing claw inclined surface opposite to the inclined surface of the inclined block 41, when in use, the annular pressing claw 53 is in contact with the inclined block 41 of the reloading carrier disc 4 under the action of the pressure spring 52 and exerts a pressing force on the inclined block 41, so that the second abrasive disc 30 can pass through the fan-shaped hole 33 and keep an extending state, a supporting force is provided for the second abrasive disc 30 in a grinding process, and the second abrasive disc 30 is ensured to be in a working state; when the change carrier tray 4 is positioned on the rotating portion 321, the ring holding-down claws 53 contact the inclined surfaces of the swash blocks 41 and guide one ends of the inclined surfaces of the swash blocks 41 to rise to contact the cylindrical protrusions 36 so that the change carrier tray 4 can rotate by one unit arc relative to the rotating main tray 3.

Based on the above embodiment, further, as shown in fig. 16, the first abrasive disc 9 includes a first shock pad 91 and a first abrasive block 92, the first shock pad 91 is fixed on the main disc body 31, and the first abrasive block 92 is correspondingly fixed on the first shock pad 91; in operation, first abrasive material piece 92 polishes the part surface under the drive of drive motor 2 of polishing, and first shock pad 91 provides cushioning effect for first abrasive material piece 92, can protect first abrasive material piece 92 better, makes first abrasive material piece 92's life longer, and preferably, first shock pad 91 is the sponge shock pad.

Based on the above embodiment, further, as shown in fig. 15, the second abrasive disc 30 includes a sliding block 301, a second shock pad 302, and a second abrasive block 303, the sliding block 301 extends upward at intervals to form sliding posts 3011, the upper ends of the sliding posts 3011 pass through the material change carrier disc 4 and are movably limited on the top surface of the material change carrier disc 4, each sliding post 3011 is sleeved with a return spring 304, two ends of the return spring 304 respectively abut against the sliding block 301 and the material change carrier disc 4, the second shock pad 302 is correspondingly fixed on the sliding block 301, and the second abrasive block 303 is correspondingly fixed on the second shock pad 302; when the grinding wheel works, the first grinding block 92 is not in contact with the main disc body 31, the return spring 304 enables the sliding block 301 to keep in a downward extending state and provides elastic support for the sliding block 301, the second grinding block 303 penetrating through the fan-shaped hole 33 is in a working state and grinds the surface of a part, the second shock absorption pad 302 provides a buffering effect for the second grinding block 303, the second grinding block 303 can be better protected, the service life of the second grinding block 303 is prolonged, and preferably, the second shock absorption pad 302 is a sponge shock absorption pad; while the second abrasive material block 303 which does not pass through the sector hole 33 contacts with the main disc body 31, the material changing carrier disc 4 slides downwards relative to the sliding post 3011 of the sliding block 301 under the effect of the material changing carrier disc 4 being pressed downwards, and the return spring 304 is compressed, so that the second abrasive material block 303 which passes through the sector hole 33 can be extended downwards more, and the second abrasive material block 303 can be in a working state.

Based on the above embodiment, further, as shown in fig. 3 and 4, a dust suction cavity 90 is formed between the hopper protection cover 7 and the material changing carrier plate 4, a vacuum nozzle (not shown) is arranged on the hopper protection cover 7, the vacuum nozzle is communicated with the dust suction cavity 90, six circular holes 42 are arranged on the material changing carrier plate 4 at intervals, four dust suction holes 311 are arranged on both sides of the main plate body 31 on the first abrasive plate 9 at intervals along the radial direction, and the dust suction holes 311 are communicated with the dust suction cavity 90 through the circular holes 42; when polishing the part surface, simultaneously through vacuum nozzle to dust absorption chamber 90 evacuation processing, make dust absorption chamber 90 be in negative pressure state, and polish the piece and the powder that produce, under atmospheric pressure, by inhaling in the dust absorption hole 311, then get into dust absorption chamber 90 through round hole 42, so, can accomplish polishing to the part surface, can carry out cleaing away of piece and powder simultaneously again, avoid piece and powder influence effect of polishing, and need not additionally to increase and clear away equipment and clear up piece and powder, practice thrift the manufacturing cost of polishing greatly.

The above is only a preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the protection scope of the present invention.

Claims (5)

1. A polishing device capable of automatically replacing three types of abrasive discs is characterized by comprising a motor base (1), a polishing driving motor (2), a rotating main disc (3), a material changing bearing disc (4), an elastic pressing assembly (5), a material changing driving cylinder (6) and a funnel protective cover (7); rotatory master (3) include master body (31) and hollow connecting axle (32), the lower extreme fixed connection of hollow connecting axle (32) is at the middle part of master body (31), equidistant three fan-shaped hole (33) that is equipped with on master body (31), the fixed cover in upper end of hollow connecting axle (32) is equipped with driven gear (8), the interval is equipped with three bar hole (34), six rectangle arch (35) and six and the protruding (35) of rectangle cylinder arch (36) that correspond from top to bottom on the circumference wall of the lower extreme of hollow connecting axle (32), be formed with rotation portion (321) between rectangle arch (35) and cylinder arch (36), bar hole (34) are located between two adjacent rectangle arch (35), the interval is equipped with the first abrasive material dish (9) of three fan-shaped on master body (31), the first abrasive discs (9) and the fan-shaped holes (33) are arranged at intervals, the rectangular protrusions (35) are used for limiting the material changing bearing discs (4) to rotate relative to the rotating main disc (3), the cylindrical protrusions (36) are used for enabling the material changing bearing discs (4) to rotate relative to the rotating main disc (3), and the rotating part (321) is used for providing a rotating space for the material changing bearing discs (4) to rotate relative to the rotating main disc (3); the discharge spout end of the funnel protective cover (7) is connected with the other end of the hollow connecting shaft (32) through a first bearing (10), and the opening end of the funnel protective cover (7) is matched with the outer wall of the main disc body (31); the funnel protection device is characterized in that the motor base (1) is fixed on a discharge spout end of the funnel protection cover (7), the grinding driving motor (2) is fixed on the motor base (1), an output end of the grinding driving motor (2) extends into the motor base (1) and is connected with a driving gear (20), and the driving gear (20) is meshed with the driven gear (8); the material changing bearing disc (4) is sleeved on the hollow connecting shaft (32), six inclined blocks (41) extend upwards from the material changing bearing disc (4) at intervals, the inner side surfaces of the inclined blocks (41) are attached to the outer circumferential wall of the hollow connecting shaft (32), the top surfaces of the inclined blocks (41) are inclined planes, six fan-shaped second abrasive discs (30) are arranged on the bottom surface of the material changing bearing disc (4) at equal intervals, and the second abrasive discs (30) are elastically connected with the material changing bearing disc (4); the disc changing device is characterized in that the material changing driving cylinder (6) is arranged in the hollow connecting shaft (32), the material changing driving cylinder (6) is fixedly connected with the motor base (1) through a pin shaft (40), a piston rod of the material changing driving cylinder (6) is connected with a first connecting rod (50), the other end of the first connecting rod (50) is connected with a second connecting rod (70) through a second bearing (60), the other end of the second connecting rod (70) is connected with a central lifting shaft (80), the central lifting shaft (80) radially extends three lifting rods (801) corresponding to the three strip-shaped holes (34), and when a disc needs to be changed, the material changing driving cylinder (6) drives the material changing bearing disc (4) to ascend through the central lifting shaft (80); the elastic pressing component (5) is sleeved on the hollow connecting shaft (32) and used for keeping the pressing force to act on the inclined block (41) of the reloading bearing disc (4).

2. The grinding device capable of automatically replacing three types of abrasive discs is characterized in that the elastic pressing-down assembly (5) comprises a circular ring blocking piece (51), a pressure spring (52) and a circular ring pressing-down claw (53), the pressure spring (52) is located between the circular ring blocking piece (51) and the circular ring pressing-down claw (53), and the free end of the circular ring pressing-down claw (53) is abutted against the inclined block (41) under the action of the pressure spring (52).

3. The grinding device capable of automatically replacing three types of abrasive discs according to claim 1, wherein the first abrasive disc (9) comprises a first shock absorption pad (91) and a first abrasive block (92), the first shock absorption pad (91) is fixed on the main disc body (31), and the first abrasive block (92) is correspondingly fixed on the first shock absorption pad (91).

4. The polishing device capable of automatically replacing three types of abrasive discs as claimed in claim 1, wherein the second abrasive disc (30) comprises a sliding block (301), a second shock absorption pad (302) and a second abrasive block (303), the sliding block (301) extends upwards at intervals with sliding columns (3011), the upper ends of the sliding columns (3011) penetrate through the material changing carrier disc (4) and are movably limited on the top surface of the material changing carrier disc (4), each sliding column (3011) is sleeved with a return spring (304), two ends of each return spring (304) respectively abut against the sliding block (301) and the material changing carrier disc (4), the second shock absorption pad (302) is correspondingly fixed on the sliding block (301), and the second abrasive block (303) is correspondingly fixed on the second shock absorption pad (302).

5. The grinding equipment capable of realizing automatic replacement of three types of abrasive discs according to claim 1, wherein a dust suction cavity (90) is formed between the funnel protection cover (7) and the material replacement bearing disc (4), a vacuum nozzle is arranged on the funnel protection cover (7) and communicated with the dust suction cavity (90), a plurality of round holes (42) are formed in the material replacement bearing disc (4) at intervals, a plurality of dust suction holes (311) are formed in the main disc body (31) on two sides of the first abrasive disc (9) at intervals along the radial direction, and the dust suction holes (311) are communicated with the dust suction cavity (90) through the round holes (42).

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