CN112975752B

CN112975752B - Sand grain collecting device of grinding machine

Info

Publication number: CN112975752B
Application number: CN202110121382.3A
Authority: CN
Inventors: 杨志钢; 朱利达
Original assignee: Hefei Suna Engineering Design Co ltd
Current assignee: Hefei Suna Engineering Design Co ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2022-11-11
Anticipated expiration: 2041-01-28
Also published as: CN112975752A

Abstract

The invention discloses a sand grain collecting device of an abrasive machine, which comprises a base, wherein the base is of a cavity structure, a plurality of cushion blocks are arranged at the bottom of the base, a first collecting box, a second collecting box and a third collecting box are arranged in the middle of the inner side of the base, one ends of the first collecting box, the second collecting box and the third collecting box penetrate through the side wall of the base and extend to the outer side of the base, the first collecting box is positioned at the top of the second collecting box, the second collecting box is positioned at the top of the third collecting box, vibration pumps are arranged on two sides in the base, a screening box is arranged at the top of the base and is of a cavity structure, a vibration frame is arranged on the inner side of the screening box, a first screen and a second screen are arranged on the inner side of the vibration frame, the first screen is matched with the first collecting box, and the second screen is matched with the second collecting box. Has the beneficial effects that: meanwhile, the utilization rate of resources is also improved.

Description

Sand grain collecting device of grinding machine

Technical Field

The invention relates to the field of machinery, in particular to a sand collecting device of a grinding machine.

Background

The grinder is a common equipment for sharpening various tools and tools, the working part of the grinder is a grinding wheel, also called a consolidation grinder, which is formed by mixing sand grains screened strictly through glue, the sand grains with different specifications form the grinding wheels with different specifications, the grinding wheel is the one with the largest usage amount and the widest use range in the grinder, and can carry out coarse, semi-fine grinding and fine grinding, grooving, cutting and the like on the excircle, the inner circle, the plane, various molded surfaces and the like of a metal or non-metal workpiece.

Problems in the related art, no effective solution has been proposed at present.

Disclosure of Invention

The invention provides a sand collecting device of a grinding machine, aiming at the problems in the related art, so as to overcome the technical problems in the prior related art.

The technical scheme of the invention is realized as follows:

a sand collecting device of a grinder comprises a base, wherein the base is of a cavity structure, a plurality of cushion blocks are arranged at the bottom of the base, a first collecting box, a second collecting box and a third collecting box are arranged in the middle of the inner side of the base, one ends of the first collecting box, the second collecting box and the third collecting box penetrate through the side wall of the base and extend to the outer side of the base, the first collecting box is positioned at the top of the second collecting box, the second collecting box is positioned at the top of the third collecting box, vibration pumps are arranged on two sides of the inner portion of the base, a screening box is arranged at the top of the base and is of a cavity structure, a vibration frame is arranged on the inner side of the screening box, a first screen and a second screen are arranged on the inner side of the vibration frame, the first screen is matched with the first collecting box, and the second screen is matched with the second collecting box, the screening box is characterized in that a funnel is arranged at the lower part of the inner side of the screening box, the funnel is matched with the collecting box in three phases, a material guide plate is arranged at the top of the inner side of the screening box, a baffle is arranged at the top of the screening box, a fixed table is arranged in the middle of one side of the screening box, a supporting seat is arranged at the top of the fixed table, a shell is arranged at the top of the supporting seat, grinding wheel covers are arranged at two ends of the shell, a motor is arranged at the inner side of the shell, a rotating shaft is arranged in the motor in an inserting manner, two ends of the rotating shaft penetrate through two ends of the shell and extend to the inner side of the grinding wheel covers, a first baffle ring and a second baffle ring are sleeved at two ends of the rotating shaft, a grinding wheel is arranged between the first baffle ring and the second baffle ring, a switch is arranged at the outer side of the shell, and an outlet guide device capable of conveniently guiding out the displacement of articles is arranged in the screening box, a screening device which is convenient for changing the density of the screen and screening the screen together with the articles is arranged in the screen I.

Further, the export device is including set up in the inside groove that slides of screening incasement, the inside groove that slides is located the last downside of screening incasement is located the downside the inside groove symmetry that slides sets up, it connects the motor to be provided with symmetrical power in the inside groove end wall that slides, power connection motor is located the inside intermediate position of inside groove that slides, power connection motor one side power connection is provided with the rotating threaded rod, rotating threaded rod surface screw-thread fit connection is provided with the cooperation piece that slides, the inside groove one side that slides is provided with and is located the side inner chamber of screening incasement, the side inner chamber internal rotation be provided with the axis of rotation, the winding of axis of rotation surface is provided with tensile curtain, tensile curtain passes the side inner chamber, tensile curtain with the cooperation piece terminal surface is fixed to utilize the downside pass through between the power connection motor tensile curtain forms certain opening so that the material is concentrated and is derived.

Further, the screening device comprises an inner cavity arranged in the screen mesh I, a penetrating inner cavity is arranged on one side of the inner cavity in a penetrating mode, a middle penetrating shaft is arranged in the end wall of the inner cavity, a plurality of matching blocks are arranged on the outer side of the middle penetrating shaft and connected with the end wall of the inner cavity in a sliding matching mode, a matching box body is arranged on one side of the matching block, the matching box body is connected with the middle penetrating shaft in a sliding matching mode, pull wires are arranged between the matching box bodies on the two sides, the top of the inner cavity is provided with a driving assembly for driving the matching block and the matching box body to slide, and a fixing assembly for fixing the matching box body on one side of the middle penetrating shaft is arranged in the matching box body.

Furthermore, the driving assembly comprises a chute arranged at the top of the internal cavity, a motor-driven matching threaded shaft is rotationally arranged in the end wall of the chute, a matching connecting slide block is arranged in the chute in a sliding manner, the matching connecting slide block is in threaded matching connection with the matching threaded shaft, a telescopic cylinder is arranged in the matching connecting slide block, and an extending convex block is arranged at the lower side of a push rod in the telescopic cylinder.

Further, fixed subassembly including set up in the cavity is passed to inside in the cooperation box, cooperation box top is provided with open-ended dress draw-in groove, inside is passed and is provided with bilateral symmetry's side driving motor in the chamber terminal wall, the cooperation screw rotating rod that the power connection of the upper and lower side of side driving motor was provided with the symmetry, cooperation screw rotating rod with inside is passed chamber terminal wall normal running fit and is connected, cooperation screw rotating rod surface screw-thread fit connection is provided with the internal thread and removes soon, cooperation screw rotating rod with inside is passed chamber terminal wall sliding fit and is connected, the fast one side pivoted of internal thread removal is provided with the side pendulum rod, side pendulum rod one side is provided with the centre gripping cooperation piece, centre gripping cooperation piece with the coaxial normal running fit of side pendulum rod is connected.

Furthermore, an opening is formed in the lower portion of the grinding wheel cover.

Furthermore, one side of the grinding wheel cover, which is far away from the shell, is provided with a clearance groove.

Further, the inboard both ends of casing all are provided with the bearing, the pivot passes through the bearing with casing fixed connection.

The invention has the beneficial effects that: through installing the abrasive machine on the fixed station, adjust suitable position, make when the grinding tool, the sand grain all falls into the inside of screening case, the baffle that both sides set up can be better prevents that the sand grain from rebounding and spattering, drive vibrations through the reciprocating pump, the sand grain that will fall into on screen cloth one and the screen cloth two separates according to the particle size, the sand grain that separates falls into collecting box one respectively according to the particle size difference, collecting box two and collecting box three, make things convenient for the after-treatment after, reuse, the operational environment in workshop has not only been kept, the utilization ratio of resource has also been improved simultaneously.

In addition, the handles are arranged on the first collecting box, the second collecting box and the third collecting box, so that the novel collecting box is convenient to use in the later period; the lower part of the grinding wheel cover is provided with the opening, so that a grinding tool is convenient to grind, and meanwhile, a protection effect is provided as far as possible; the grinding wheel cover is fixedly connected with the shell through the locking screw, so that the grinding wheel cover is convenient to install and replace; the side, away from the shell, of the grinding wheel cover is provided with the clearance groove, so that the grinding wheel cover is prevented from interfering with the rotating shaft, and the service life is prevented from being influenced by abrasion; the bearings are arranged at two ends of the inner side of the shell, the rotating shaft is fixedly connected with the shell through the bearings, a certain supporting effect is provided, and meanwhile, abrasion is reduced and transmission efficiency is improved.

The equipment adopts the design of the outlet guide device and the screening device, utilizes the design of the rotating shaft, the stretching curtains, the side inner cavities, the sliding inner grooves, the sliding matching blocks, the rotating threaded rods and the power connecting motor in the outlet guide device to form a certain opening between the stretching curtains so as to lead the objects to fall down in a centralized way, adopts the design of the matching blocks, the matching box body, the clamping grooves, the pull wires, the matching threaded shafts, the matching connecting sliding blocks, the telescopic cylinders and the like in the screening device to lead the pull wires to slide around the middle through shaft so as to lead the pull wires to be positioned at any position so as to be locked to form a net-shaped structure with different density degrees, and utilizes the design of the inner through cavity, the matching threaded rotating rod, the internal threads to move fast, the side driving motor, the side oscillating rods, the clamping matching blocks and the middle through shaft so that the pull wires can be fixed indirectly to maintain the net-shaped structure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a structural view of a sand collecting device of a grinder according to an embodiment of the present invention;

fig. 2 is a side view of a grinder sand collection device according to an embodiment of the present invention;

FIG. 3 is a side view of a wheel guard of a grinder sand collection device in accordance with an embodiment of the present invention;

FIG. 4 is an enlarged schematic view of the screen box of FIG. 1 of the present invention;

FIG. 5 is a schematic structural view of the first screen of FIG. 4 according to the present invention;

FIG. 6 is an enlarged schematic view at A of FIG. 4 of the present invention;

FIG. 7 is an enlarged schematic view of the invention at B of FIG. 4;

FIG. 8 is an enlarged schematic view of the invention at C of FIG. 4;

FIG. 9 is an enlarged schematic view of the invention at D in FIG. 4;

FIG. 10 is an enlarged schematic view of the invention at E of FIG. 9;

in the figure:

1. a base; 2. a cushion block; 3. a first collecting box; 4. a second collecting box; 5. a third collecting box; 6. vibrating the pump; 7. screening the box; 8. vibrating the frame; 9. a first screen mesh; 10. a second screen; 11. a funnel; 12. a stock guide; 13. a baffle plate; 14. a fixed table; 15. a supporting seat; 16. a housing; 17. a grinding wheel cover; 18. a motor; 19. a rotating shaft; 20. a first baffle ring; 21. a second baffle ring; 22. a grinding wheel; 23. a switch; 24. a handle; 25. an opening; 26. an empty avoiding groove; 27. locking a ring; 28. bearing II, a rotating shaft 31, a stretching curtain 32, a side inner cavity 33, a rotating threaded rod 34, a sliding inner groove 35, a sliding matching block 41, a power connecting motor 42, a matching block 51, a clamping groove 52, an extending lug 53, a matching threaded shaft 54, a matching connecting slide block 55, a telescopic cylinder 56, a matching box body 57, an inner cavity 58, a penetrating inner cavity 59, a stay wire 60, a middle penetrating shaft 61, an inner penetrating cavity 63, a matching threaded rotating rod 64, an internal thread moving block 65, a side driving motor 66, a side swinging rod 67 and a clamping matching block 68.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived from the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.

According to an embodiment of the present invention, a grinder sand collecting device is provided.

As shown in fig. 1-10, a sand collecting device of a grinder according to an embodiment of the present invention includes a base 1, the base 1 is a cavity structure, a plurality of pads 2 are disposed at the bottom of the base 1, a first collecting box 3, a second collecting box 4 and a third collecting box 5 are disposed at the middle portion of the inner side of the base 1, one end of each of the first collecting box 3, the second collecting box 4 and the third collecting box 5 penetrates through the sidewall of the base 1 and extends to the outer side of the base 1, the first collecting box 3 is disposed at the top of the second collecting box 4, the second collecting box 4 is disposed at the top of the third collecting box 5, a vibration pump 6 is disposed at both sides of the inner portion of the base 1, a screening box 7 is disposed at the top of the base 1, the screening box 7 is a cavity structure, a vibration frame 8 is disposed at the inner side of the screening box 7, a first screen 9 and a second screen 10 are disposed at the inner side of the vibration frame 8, the first screen 9 is adapted to the first collecting box 3, the second screen 10 is adapted to the second collecting box 4, a funnel 11 is disposed at the inner side of the screening box 7, a funnel 11 is adapted to the third collecting box 5, a guide plate 12 is disposed at the inner side of the screening box, a baffle plate 16 is disposed at the top of the screening box 7, a top of the screening box, a support frame 16 is disposed at the top of the screening box, a fixed at the top of the screening box, a support frame 16 is disposed at the top of the support frame 16, a motor 16, a fixed at both ends of the support frame 16, a support frame 16 is disposed at the support frame 16, a top of the support frame 16, a support frame 16 is disposed at the support frame 16, a motor 16 is disposed at both ends of the support frame 16, a top of the support frame 16, a support frame 16 is disposed at both ends of the support frame 16, a top of the support frame 16, a motor 16 is disposed at both ends of the support frame 16, a screening device which is convenient for changing the density of the screen and intensively screening the screen and the articles is arranged in the first screen 9.

The guide outlet device comprises a sliding inner groove 35 arranged in the screening box 7, the sliding inner groove 35 is positioned on the upper side and the lower side in the screening box 7, the sliding inner grooves 35 on the upper side and the lower side are symmetrically arranged, symmetrical power connection motors 42 are arranged in end walls of the sliding inner grooves 35, the power connection motors 42 are positioned in the middle positions in the sliding inner grooves 35, one side of each power connection motor 42 is provided with a rotating threaded rod 34 in a power connection mode, the outer surface of each rotating threaded rod 34 is provided with a sliding matching block 41 in a threaded matching mode, one side of each sliding inner groove 35 is provided with a side inner cavity 33 positioned in the screening box 7, a rotating shaft 31 is rotatably arranged in the side inner cavities 33, a rewinding spring is arranged between each rotating shaft 31 and the end wall of the side inner cavity 33, a stretching curtain 32 is wound on the outer surface of each rotating shaft 31, the stretching curtain 32 penetrates through the side inner cavities 33, the stretching curtains 32 are fixed with the end faces of the sliding matching blocks 41, and therefore certain openings are formed between the power connection motors 42 on the upper side and the lower side so that materials can be conveniently and intensively guided out.

The screening device is including setting up the inside chamber 58 in screen cloth one 9, inside chamber 58 one side is provided with the inner chamber 59 that pierces through that runs through, inside chamber 58 annular array is provided with four and is located screen cloth one 9, it wears axle 61 in the middle of being provided with in the end wall of inside chamber 58, it is provided with a plurality of cooperation pieces 51 to wear the axle 61 outside in the middle of wearing, cooperation piece 51 is connected with inside chamber 58 end wall sliding fit, cooperation piece 51 one side is provided with cooperation box 57, cooperation box 57 is connected with middle axle 61 sliding fit of wearing, be provided with between the cooperation box 57 of both sides and act as go-between 60, it forms network structure to set up in turn from top to bottom between the cooperation box 57 of left and right sides and front and back side, inside chamber 58 top is provided with the drive subassembly that drives cooperation piece 51 and cooperation box 57 and slide, be provided with the fixed subassembly that wears axle 61 one side in the middle of being fixed in cooperation box 57.

The driving component comprises a sliding groove 69 arranged at the top of the internal cavity 58, a matching threaded shaft 54 driven by a motor is arranged in the end wall of the sliding groove 69 in a rotating mode, a matching connecting sliding block 55 is arranged in the sliding groove 69 in a sliding mode, the matching connecting sliding block 55 is in threaded matching connection with the matching threaded shaft 54, a telescopic air cylinder 56 is arranged in the matching connecting sliding block 55, and an extending convex block 53 is arranged on the lower side of a push rod in the telescopic air cylinder 56.

Fixed subassembly passes chamber 63 including setting up the inside in cooperation box 57, cooperation box 57 top is provided with open-ended dress draw-in groove 52, inside passes and is provided with bilateral symmetry's side drive motor 66 in the chamber 63 end wall, the power connection of the side drive motor 66 upside down is provided with symmetrical cooperation screw thread swing pole 64, cooperation screw thread swing pole 64 passes chamber 63 end wall normal running fit with inside and is connected, cooperation screw thread swing pole 64 surface screw thread fit connection is provided with the fast 65 of internal thread removal, cooperation screw thread swing pole 64 screw thread of upside down turns to opposite, cooperation screw thread swing pole 64 passes chamber 63 end wall sliding fit with inside and is connected, the fast 65 one side pivoted of internal thread removal is provided with side pendulum rod 67, side pendulum rod 67 one side is provided with centre gripping cooperation piece 68, centre gripping cooperation piece 68 is connected with the coaxial normal running fit of side pendulum rod 67.

By means of the above-mentioned technical scheme, through installing the abrasive machine on fixed station 14, adjust suitable position, make when the instrument of polishing, the sand grain all falls into the inside of screening case 7, baffle 13 that both sides set up can be better prevents sand grain bounce-back sputtering, drive vibrations frame 8 vibrations through reciprocating pump 6, the sand grain that will fall into on screen cloth 9 and screen cloth two 10 separates according to the particle size, the sand grain that separates falls into respectively in collecting box 3 according to the particle size difference, in collecting box two 4 and collecting box three 5, make things convenient for the post processing back, reuse, the operational environment in workshop has not only been kept, the utilization ratio of resource has also been improved simultaneously.

In addition, the handles 24 are arranged on the first collecting box 3, the second collecting box 4 and the third collecting box 5, so that the use at the later stage is facilitated; the lower part of the grinding wheel cover 17 is provided with the opening 25, so that a grinding tool is convenient, and meanwhile, a protection effect is provided as far as possible; the grinding wheel cover 17 is fixedly connected with the shell 16 through the locking screws, so that the installation and the replacement are convenient; the side, far away from the shell 16, of the grinding wheel cover 17 is provided with the clearance groove 26, so that the grinding wheel cover 17 is prevented from interfering with the rotating shaft 19, and the service life is prevented from being influenced by abrasion; by arranging the bearings 28 at the two ends of the inner side of the shell 16, the rotating shaft 19 is fixedly connected with the shell 16 through the bearings 28, a certain supporting effect is provided, and meanwhile, the abrasion is reduced and the transmission efficiency is improved.

When screening articles, firstly, the outlet guide device in the equipment can intensively drop the articles to any position on the upper side of the screening net I9, then the outlet guide device can adjust the net density on the lower side of the screening device according to actual conditions to control the screening degree, when the outlet guide device works, the power connection motor 42 drives the rotating threaded rod 34 to rotate after working, the rotating threaded rod 34 drives the sliding matching blocks 41 to slide on one side of the sliding inner groove 35, at the moment, the rotating shaft 31 drives the stretching curtain 32 to slide out or extend in under the action of the rewinding spring, so that the size of an opening area formed between the sliding matching blocks 41 can be controlled, and the position can be adjusted in a sliding manner according to actual conditions, so that the opening area formed between the sliding matching blocks 41 can conveniently and intensively lead out the articles, when the screening device works, firstly, the matching connecting slide block 55 is driven to slide in the sliding groove 69 after the matching threaded shaft 54 works, in the process, the extending projection 53 and the clamping groove 52 are clamped when the matching connecting slide block 55 slides in the telescopic cylinder 56 works, the matching box body 57 and the matching block 51 can be driven to slide after the matching connecting slide block 55 slides, so that the pull wire 60 can form a net structure with different densities after moving to be opposite to the outlet guide device, when the pull wire 60 is locked, the matching threaded rotating rod 64 is driven to rotate after the side driving motor 66 works, the matching threaded rotating rod 64 drives the internal thread moving block 65 to move, and then the matching box body 57 and the pull wire 60 can be fixed by driving the clamping matching block 68 and the middle penetrating shaft 61 to be clamped and fixed through the side swing rod 67.

In conclusion, according to the technical scheme of the invention, the grinder is arranged on the fixed table 14, and the proper position is adjusted, so that sand falls into the screening box 7 during grinding of the tool, the baffles 13 arranged on two sides can better prevent sand from rebounding and sputtering, the vibration pump 6 drives the vibration frame 8 to vibrate, the sand falling into the screen I9 and the screen II 10 is separated according to the particle size, and the separated sand falls into the collecting box I3, the collecting box II 4 and the collecting box III 5 respectively according to different particle sizes, so that the sand is convenient to be recycled after post-treatment, the working environment of a workshop is maintained, and the utilization rate of resources is improved.

In addition, the handles 24 are arranged on the first collecting box 3, the second collecting box 4 and the third collecting box 5, so that the use at the later stage is facilitated; the lower part of the grinding wheel cover 17 is provided with the opening 25, so that a grinding tool is convenient, and meanwhile, a protection effect is provided as far as possible; the grinding wheel cover 17 is fixedly connected with the shell 16 through the locking screws, so that the installation and the replacement are convenient; the side, far away from the shell 16, of the grinding wheel cover 17 is provided with the clearance groove 26, so that the grinding wheel cover 17 is prevented from interfering with the rotating shaft 19, and the service life is prevented from being influenced by abrasion; by arranging the bearings 28 at the two ends of the inner side of the shell 16, the rotating shaft 19 is fixedly connected with the shell 16 through the bearings 28, a certain supporting effect is provided, and meanwhile, abrasion is reduced and the transmission efficiency is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The sand grain collecting device of the grinder is characterized by comprising a base (1), wherein the base (1) is of a cavity structure, a plurality of cushion blocks (2) are arranged at the bottom of the base (1), a first collecting box (3), a second collecting box (4) and a third collecting box (5) are arranged in the middle of the inner side of the base (1), one end of the first collecting box (3), one end of the second collecting box (4) and one end of the third collecting box (5) penetrate through the side wall of the base (1) and extend to the outer side of the base (1), the first collecting box (3) is located at the top of the second collecting box (4), the second collecting box (4) is located at the top of the third collecting box (5), vibration pumps (6) are arranged on two sides of the inner portion of the base (1), a screening box (7) is arranged on the top of the base (1), the screening box (7) is of the cavity structure, a vibration frame (8) is arranged on the inner side of the screening box (7), a first screen (9) and a second screen (10) are arranged on the inner side of the screening box (8), the first screening box (9) and a screen (10) are matched with the second collecting box (11) and the inner side of the hopper (4), funnel (11) with collection box three (5) looks adaptation, the inboard top of screening case (7) is provided with stock guide (12), the top of screening case (7) is provided with baffle (13), one side middle part of screening case (7) is provided with fixed station (14), the top of fixed station (14) is provided with supporting seat (15), the top of supporting seat (15) is provided with casing (16), the both ends of casing (16) all are provided with grinding wheel cover (17), the inboard of casing (16) is provided with motor (18), the inboard interlude of motor (18) is provided with pivot (19), the both ends of pivot (19) all run through the both ends of casing (16) and extend to the inboard of grinding wheel cover (17), the both ends of pivot (19) all are equipped with and keep off ring one (20) and keep off ring two (21), keep off ring one (20) with keep off and be provided with between the ring two (21) and be provided with emery wheel (22), the outside of casing (16) is provided with switch (23), be provided with in the screening case (7) and carry out the export device of being convenient for deriving the article and remove the export device.

2. A grinder sand grain collecting device according to claim 1, characterized in that the outlet guide means comprises a sliding inner groove (35) arranged in the screening box (7), the sliding inner groove (35) is located at the upper and lower sides in the screening box (7), the sliding inner groove (35) is symmetrically arranged at the upper and lower sides, a symmetrical power connection motor (42) is arranged in the end wall of the sliding inner groove (35), the power connection motor (42) is located at the middle position in the sliding inner groove (35), a rotating threaded rod (34) is arranged at one side of the power connection motor (42), a sliding fitting block (41) is arranged at the outer surface of the rotating threaded rod (34) in a screw-fit connection manner, a side inner cavity (33) located in the screening box (7) is arranged at one side of the sliding inner groove (35), a rotating shaft (31) is arranged in the side inner cavity (33), a stretching curtain (32) is arranged at the outer surface of the rotating shaft (31), the stretching curtain (32) passes through the side inner cavity (33), the stretching curtain (32) and the sliding fitting block (41) is fixedly arranged with the stretching curtain so as to guide the upper and the opening of the stretching motor (42) for forming a certain concentration of the material.

3. The sand collecting device of the grinding machine according to claim 1, wherein the screening device comprises an inner cavity (58) arranged in the screen mesh I (9), a penetrating inner cavity (59) penetrating through the inner cavity (58) is arranged on one side of the inner cavity (58), a middle penetrating shaft (61) is arranged in an end wall of the inner cavity (58), a plurality of matching blocks (51) are arranged on the outer side of the middle penetrating shaft (61), the matching blocks (51) are connected with the end wall of the inner cavity (58) in a sliding fit manner, a matching box body (57) is arranged on one side of the matching blocks (51), the matching box body (57) is connected with the middle penetrating shaft (61) in a sliding fit manner, pull wires (60) are arranged between the matching box bodies (57) on two sides, a driving component for driving the matching blocks (51) and the matching box body (57) to slide is arranged on the top of the inner cavity (58), and a fixing component for fixing the matching box body (57) on one side of the middle penetrating shaft (61) is arranged in the matching box body (57).

4. The sand collecting device of the grinding machine according to claim 3, wherein the driving component comprises a sliding groove (69) arranged at the top of the internal cavity (58), a matching threaded shaft (54) driven by a motor is arranged in the end wall of the sliding groove (69) in a rotating manner, a matching connecting slide block (55) is arranged in the sliding groove (69) in a sliding manner, the matching connecting slide block (55) is in threaded matching connection with the matching threaded shaft (54), a telescopic cylinder (56) is arranged in the matching connecting slide block (55), and an extending convex block (53) is arranged on the lower side of a push rod in the telescopic cylinder (56).

5. The sand collecting device of the grinding machine according to claim 4, wherein a fixing component comprises an inner through cavity (63) arranged in the matching box body (57), an open clamping groove (52) is formed in the top of the matching box body (57), bilaterally symmetrical side driving motors (66) are arranged in the end walls of the inner through cavity (63), symmetrical matching threaded rotating rods (64) are arranged on the upper side and the lower side of the side driving motors (66) in a power connection mode, the matching threaded rotating rods (64) are connected with the end walls of the inner through cavity (63) in a rotating fit mode, an inner thread moving block (65) is arranged on the outer surface of each matching threaded rotating rod (64) in a threaded fit connection mode, the matching threaded rotating rods (64) are connected with the end walls of the inner through cavity (63) in a sliding fit mode, a side swinging rod (67) is arranged on one side of each inner thread moving block (65) in a rotating mode, a clamping matching block (68) is arranged on one side of each side swinging rod (67), and the clamping matching block (68) is connected with the side swinging rod (67) in a coaxial rotating fit mode.

6. A grinder sand collecting device according to claim 1, characterized in that the lower part of the wheel guard (17) is provided with an opening (25).

7. A grinder sand collection device as claimed in claim 1, characterized in that the side of the wheel guard (17) remote from the housing (16) is provided with a clearance groove (26).

8. A grinder sand collection device as claimed in claim 1, characterized in that the spindle (19) is provided with a thread at both ends, which thread matches the locking ring (27).

9. A grinder sand collection device as claimed in claim 1, characterised in that bearings (28) are provided at both ends of the inside of the housing (16), the spindle (19) being fixedly connected to the housing (16) via the bearings (28).