CN111483008A - A dust-proof device for a glass fiber board drilling machine - Google Patents

Abstract

The invention relates to the technical field of glass fiber boards, in particular to a dustproof device of a glass fiber board drilling machine, which comprises a drilling machine main body, wherein the dustproof device is arranged at one end, extending out of a main shaft, of the drilling machine main body, and comprises a dustproof cover body and a sealing plate, the dustproof cover body comprises a first cover body, a second cover body and a third cover body, the center of the top of the first cover body is sleeved and fixed on the peripheral wall of a shell of the drilling machine main body, the center of the top of the second cover body is sleeved and fixed on the peripheral wall of the shell of the drilling machine main body, the center of the top of the third cover body is sleeved and fixed on the peripheral wall of the shell of the main shaft, the sealing plate comprises a left sealing plate and a right sealing plate which are identical in shape and size. The invention provides a dustproof device of a glass fiber board drilling machine, which can collect glass fiber dust in the air and avoid harm to human bodies.

Description

A dust-proof device for a glass fiber board drilling machine

technical field

The invention relates to the technical field of glass fiber boards, in particular to a dustproof device for a glass fiber board drilling machine.

Background technique

Fiberglass board, also known as fiberglass board, is composed of glass fiber material and high heat-resistant composite material. It has the characteristics of sound absorption, sound insulation, heat insulation, environmental protection and flame retardant, especially in construction, chemical and machinery manufacturing industries. It is very extensive and has high utilization value.

The use of glass fiber board requires cutting and drilling processes, but in the process of drilling glass fiber board, the drill bit of the drilling machine hits the glass fiber board, which will cause a large amount of dust. The glass fiber dust contains irritants to human skin and respiratory system. Sexual substances, placed in this environment for a long time, will cause serious harm to the human body.

The publication number CN205660182U "An Induction Automatic Drilling Machine" uses an infrared induction device to realize the high-speed rotation of the spindle to drive the drill to automatically drill holes, but the drilling device cannot solve the problem of glass fiber powder splashing during the drilling of the glass fiber board.

SUMMARY OF THE INVENTION

In order to solve the problem of dust splashing in the process of drilling a glass fiber board, the invention provides a dustproof device for a glass fiber board drilling machine, which can collect the glass fiber dust in the air and avoid harm to the human body.

The present invention provides the following technical solutions: a dust-proof device for a glass fiber board drilling machine, comprising a main body of a drilling machine, a main shaft protruding from one end of the main body of the drilling machine, a drill bit installed at the end of the main shaft, and the drilling A dust-proof device is installed at one end of the main body extending out of the main shaft;

The dustproof device includes a dustproof cover body and a sealing plate, the dustproof cover body includes a first cover body, a second cover body and a third cover body, and the first cover body is a hollow cube with an open bottom surface, so the The top surface of the first cover body is provided with a plurality of radial strip-shaped through holes arranged in a circular array along the center of the top surface, and dust-proof cotton is installed in the plurality of strip-shaped through holes. Buckling rings are symmetrically arranged at the bottom of the left and right outer sides of the first cover body, the top center of the first cover body is sleeved and fixed on the peripheral wall of the casing of the main body of the drilling machine, the second cover body is installed inside the first cover body, and the The second cover body is a hollow hemisphere with a horizontal bottom surface and an open bottom surface. The peripheral wall of the second cover body is provided with a plurality of rows of first arc through holes penetrating the inside and outside of the peripheral wall of the second cover body. The top center is sleeved and fixed on the peripheral wall of the casing of the main body of the drilling machine, there is a space between the outer peripheral wall of the second cover and the inner peripheral wall of the first cover, and the bottom surface of the second cover is flush with the bottom surface of the first cover. The third cover is a hollow hemisphere with a diameter smaller than that of the second cover, and the bottom surface is horizontal and the bottom surface is open. A radial wind deflector, a second arc-shaped through hole penetrating the inside and outside of the peripheral wall of the third cover body is provided between each two wind guide plates, and a track is provided at the bottom circumference of the outer peripheral wall of the third cover body, The center of the top of the third cover is sleeved and fixed on the main shaft, and there is a space between the top of the wind deflector on the third cover and the inner peripheral wall of the second cover;

The sealing plate is composed of a left sealing plate and a right sealing plate with the same shape and size. The left sealing plate and the right sealing plate are symmetrically installed at the opening of the bottom surface of the first cover body, and the left sealing plate and the right sealing plate are opposite to each other. One side is the inner side, and the other side of the left sealing plate and the right sealing plate is the outer side. For the locks corresponding to the buckles, the circumferential surfaces of the semicircular grooves of the left sealing plate and the right sealing plate are provided with U-shaped grooves with U-shaped longitudinal cross-sections facing each other. A plurality of balls are arranged at intervals in the groove, the inner sides of the left sealing plate and the right sealing plate outside the two ends of the semicircular groove are connecting surfaces, and the connecting surfaces are provided with threaded holes, and the left sealing plate The semi-circular grooves on the plate and the right sealing plate are both provided with bearing plates, the bearing plates are arc-shaped plates with the same arc as the semi-circular grooves, and a plurality of and U are arranged on the bearing plates at intervals. The diameter corresponding to the ball in the groove is smaller than the limit through hole of the ball, both ends of the bearing plate are connected with a fixing plate corresponding to the connecting surface, and the fixing plate is provided with a counterbore corresponding to the threaded hole, so The convex outer arc surface of the carrier plate fits with the circumferential surface of the semicircular groove, one side of the ball slidingly contacts the bottom surface of the U-shaped groove where it is located, and the other side slides into contact with the third ball at the track through the limit through hole. The outer peripheral wall of the cover, the fixing plate is fixed on the connecting surface through the connecting bolts passing through the countersunk hole and the threaded hole, the bearing plates of the left sealing plate and the right sealing plate are butted to form a circular through hole, and the left sealing plate is provided with a circular through hole. The lock is locked with the buckle on the left side of the first cover, the semicircular groove on the left sealing plate is locked into the left side of the track on the third cover, and the lock provided on the right sealing plate is connected to the first cover. The buckle on the right side of the body is locked, and the semicircular groove on the right sealing plate is locked into the right side of the track on the third cover body.

Further, the dustproof cotton is a sheet body made of polyethylene material.

Further, the center of the top of the first cover is provided with a first through hole penetrating the lower and lower surfaces of the top surface, the center of the top of the second cover is provided with a second through hole, and the center of the top of the third cover is provided with a first through hole. Three through holes, the first through hole, the second through hole and the third through hole are holes on the same central axis.

Further, the plurality of rows of first arc-shaped through holes provided on the peripheral wall of the second cover body are horizontally arranged and parallel to each other, and each row of first arc-shaped through-holes is formed by a plurality of horizontal first arc-shaped through-hole rings. shape display composition.

Further, the bottom surface of the third cover body is lower than the bottom surface of the second cover body and higher than the top of the drill bit on the main shaft.

Further, the wind deflector is an arc-shaped plate with a top surface and a bottom surface that protrude upwards, the upper end of the wind deflector is close to the center of the top surface of the third cover body, and the lower end extends to the lower part of the third cover body to guide the wind. Any one of the two plate surfaces of the plate is inclined toward the other plate surface, and the inclination angles of the wind deflectors in the plurality of annular arrays are the same, and the inclination directions are arranged clockwise or counterclockwise.

Further, the track includes two circular rings with the same diameter that correspond up and down, the inner ring surfaces of the two rings are fixed on the lower end of the outer peripheral wall of the third cover, The distance between the two rings and the outer peripheral wall of the third cover body between the two rings constitutes a track.

Further, the thicknesses of the left sealing plate and the right sealing plate are both smaller than the distance left between the two rings of the track.

Further, when the latch provided on the left sealing plate is locked with the retaining ring on the left side of the first cover body, the top surface of the left sealing plate is abutted with the bottom surfaces of the left side of the first cover body and the second cover body.

Further, the upper end of the second arc-shaped through hole is close to the center of the top surface of the third cover body, and the lower end of the second arc-shaped through hole extends toward the lower part of the third cover body.

Beneficial effects:

The main body of the drilling machine of the present invention is fixed with a first cover body and a second cover body, the main shaft of the drilling machine main body is fixed with a third cover body, the sealing plate seals the bottom surfaces of the first cover body and the second cover body, and at the same time The bottom surfaces of the second cover body and the third cover body are sealed, the peripheral wall of the second cover body is provided with a plurality of rows of first arc through holes penetrating the peripheral wall of the second cover body, and the top surface of the first cover body is provided with a center along the top surface. The annular array of radial strip through holes, the outer peripheral wall of the third cover is provided with a plurality of wind deflectors in a circular array along the center of the top surface and radially toward the lower part of the third cover. A second arc-shaped through hole penetrating the inside and outside of the peripheral wall of the third cover body is arranged in each room. The spindle drives the drill bit to make holes in the glass fiber board and drives the third cover body to rotate, and the rotation of the third cover body drives the wind deflector to rotate toward the third cover body. The inner wall of the second cover is blown, and the air in the third cover enters between the second cover and the third cover through the second arc-shaped through hole on the third cover, and the powder generated by the impact drilling of the drill bit enters with the air flow Between the second cover and the third cover, the powder enters between the first cover and the second cover with the airflow through the first arc through hole on the second cover. The problem of dust splashing during the process.

Description of drawings

Fig. 1 is the sectional view of the present invention;

Fig. 2 is the partial enlarged view of A place in Fig. 1;

Fig. 3 is the top view of the first cover of the present invention;

4 is a top view of the second cover of the present invention;

Fig. 5 is the top view of the third cover of the present invention;

Fig. 6 is the structural representation of the left sealing plate of the present invention;

7 is a schematic diagram of the position of the U-shaped groove on the left sealing plate of the present invention.

The symbols in the figure are: 1 is the left sealing plate, 2 is the lock, 3 is the buckle, 4 is the first cover, 5 is the third through hole, 6 is the first through hole, 7 is the main body of the drilling machine, 8 is the second through hole, 9 is the second cover body, 10 is the wind deflector, 11 is the first arc through hole, 12 is the third cover body, 14 is the second arc through hole, 15 is the main shaft, 16 is the Drill bit, 17 is track, 18 is ball, 19 is strip through hole, 20 is dustproof cotton, 21 is right sealing plate, 22 is bearing plate, 23 is U-shaped groove, 24 is connecting bolt, 25 is fixing plate, 26 is a limit through hole, and 27 is a threaded hole.

Detailed ways

As shown in Figures 1-7: a dustproof device for a glass fiber board drilling machine, including a drilling machine main body 7, a main shaft 15 protrudes from one end of the drilling machine main body 7, and a drill bit is installed at the end of the main shaft 15 16. A dustproof device is installed at one end of the main body 7 of the drilling machine extending out of the main shaft 15;

The dustproof device includes a dustproof cover body and a sealing plate, the dustproof cover body includes a first cover body 4, a second cover body 9 and a third cover body 12, and the first cover body 4 has an open bottom surface. A hollow cube, the top surface of the first cover body 4 is provided with a plurality of radial strip-shaped through holes 19 in an annular array along the center of the top surface, and dust-proof cotton is installed in the plurality of strip-shaped through holes 19 20. The dustproof cotton 20 is a sheet-like body made of polyethylene material. The bottom of the left and right outer sides of the first cover body 4 is symmetrically provided with a buckle 3, and the top center of the first cover body 4 It is sleeved and fixed on the peripheral wall of the casing of the main body 7 of the drilling machine. The second cover body 9 is installed inside the first cover body 4. The second cover body 9 is a hollow hemisphere with a horizontal bottom surface and an open bottom surface. The peripheral wall of the second cover body 9 is provided with multiple rows of first arc-shaped through holes 11 penetrating the inside and outside of the peripheral wall of the second cover body 9, and the multiple rows of first arc-shaped through holes 11 provided on the peripheral wall of the second cover body 9 are horizontal. The first arc through holes 11 are arranged in parallel with each other, and each row of the first arc through holes 11 is formed by a plurality of horizontal first arc through holes in an annular array. The top center of the second cover body 9 is sleeved and fixed on the drilling machine. On the peripheral wall of the outer shell of the main body 7, there is a space between the outer peripheral wall of the second cover body 9 and the inner peripheral wall of the first cover body 4, the bottom surface of the second cover body 9 and the bottom surface of the first cover body 4 are flush, and the The third cover body 12 is a hollow hemisphere whose diameter is smaller than that of the second cover body 9, and the bottom surface is horizontal and the bottom surface is open. The lower part of the body 12 is a radial wind deflector 10. The wind deflector 10 is a plate body with a top surface and a bottom surface that are upwardly convex in an arc shape. The upper end of the wind deflector is close to the center of the top surface of the third cover body 12. The lower end extends to the lower part of the third cover body 12 , any one of the two plate surfaces of the wind deflector is inclined toward the other plate surface, the inclination angles of the wind deflectors 10 in the plurality of annular arrays are the same, and the inclination directions are in the same direction. Arranged clockwise or counterclockwise, a second arc-shaped through hole 14 penetrating the inside and outside of the peripheral wall of the third cover body 12 is provided between each of the two wind deflectors 10 . A track 17 is provided. The track 17 includes two circular rings corresponding to the top and bottom and having the same diameter. There is a space between the two rings and the outer peripheral wall of the third cover body 12 between the two rings constitutes a track 17, the center of the top of the third cover body 12 is sleeved and fixed on the main shaft 15, and the first There is a space between the top of the wind deflector 10 on the third cover body 12 and the inner peripheral wall of the second cover body 9 , and the bottom surface of the third cover body 12 is lower than the bottom surface of the second cover body 9 and higher than the top of the drill bit 16 on the main shaft 15 , the center of the top of the first cover body 4 is provided with a first through hole 6 that penetrates through the upper and lower surfaces of the top surface, the center of the top of the second cover body 9 is provided with a second through hole 8, and the center of the top of the third cover body 12 A third through hole 5 is provided, and the first through hole 6, the second through hole 8 and the third through hole 5 are holes on the same central axis;

The sealing plate is composed of a left sealing plate 1 and a right sealing plate 21 with the same shape and size. The left sealing plate 1 and the right sealing plate 21 are symmetrically installed at the opening of the bottom surface of the first cover 4. The opposite side of the 1 and the right sealing plate 21 is the inner side, the other side of the left sealing plate 1 and the right sealing plate 21 is the outer side, and the inner sides of the left sealing plate 1 and the right sealing plate 21 are both provided with semicircular grooves , the outer sides are provided with locks 2 corresponding to the buckles 3 on the first cover 4, and the circumferential surfaces of the semi-circular grooves of the left sealing plate 1 and the right sealing plate 21 are provided with open opposite longitudinal sections It is a U-shaped U-shaped groove 23. The two U-shaped grooves 23 facing each other are provided with a plurality of balls 18 at intervals. The left sealing plate 1 and the right sealing plate 21 outside the two ends of the semi-circular groove are The inner sides are connecting surfaces, and the connecting surfaces are provided with threaded holes 27. The semicircular grooves on the left sealing plate 1 and the right sealing plate 21 are both provided with bearing plates 22. The bearing plates 22 are An arc-shaped plate body with the same arc as the semi-circular groove, the carrier plate 22 is provided with a plurality of limit through holes 26 with a diameter smaller than that of the balls corresponding to the balls in the U-shaped groove 23, and the carrier plate 22 Both ends are connected with a fixing plate 25 corresponding to the connecting surface. The fixing plate 25 is provided with countersunk holes corresponding to the threaded holes 27. The peripheral surfaces are in contact with each other, one side of the ball slidingly contacts the bottom surface of the U-shaped groove 23 where it is located, and the other side slides into contact with the outer peripheral wall of the third cover body 12 at the track 17 through the limit through hole 26, and the fixing plate 25 The connecting bolts 24 in the countersunk holes and the threaded holes 27 are fixed on the connecting surface, and the bearing plates 22 of the left sealing plate 1 and the right sealing plate 21 are connected to form circular through holes. The buckle 3 on the left side of the first cover body 4 is locked, the semicircular groove on the left sealing plate 1 is locked into the left side of the track 17 on the third cover body 12 , and the lock buckle 2 provided on the right sealing plate 21 It is locked with the retaining ring 3 on the right side of the first cover body 4 , and the semicircular groove on the right sealing plate 21 is snapped into the right side of the track 17 on the third cover body 12 .

The thicknesses of the left sealing plate 1 and the right sealing plate 21 are both smaller than the distance left between the two rings of the track 17 . When the ring 3 is locked, the top surface of the left sealing plate 1 is in contact with the bottom surface of the left side of the first cover body 4 and the second cover body 9 , and the upper end of the second arc through hole 14 is close to the top of the third cover body 12 . At the center of the surface, the lower end of the second arc-shaped through hole 14 extends toward the lower part of the third cover body 12 .

During use, a first cover body and a second cover body are fixed on the main body of the drilling machine of the present application, a third cover body is fixed on the main shaft of the drilling machine main body, and the sealing plate seals the first cover body and the second cover body. The bottom surface simultaneously seals the bottom surfaces of the second cover body and the third cover body. The peripheral wall of the second cover body is provided with a plurality of rows of first arc-shaped through holes penetrating the peripheral wall of the second cover body. Radial strip through holes in the central annular array on the top surface, and a plurality of wind deflectors radiating toward the lower part of the third hood along the central annular array of the top surface are arranged on the outer peripheral wall of the third cover. A second arc-shaped through hole penetrating the inner and outer walls of the third cover body is arranged between the wind plates. The main shaft drives the drill bit to make holes in the glass fiber board and drives the third cover body to rotate, and the rotation of the third cover body drives the wind deflector. Rotate to blow air towards the inner wall of the second cover, the air in the third cover enters between the second cover and the third cover through the second arc through hole on the third cover, and the powder generated by the impact drilling of the drill bit follows the hole. As the airflow enters between the second cover and the third cover, the powder enters between the first cover and the second cover with the airflow through the first arc through hole on the second cover. The invention solves the problem of the glass fiber board. The problem of dust splashing during the punching process.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (10)

1. A dustproof device for a glass fiber board drilling machine, comprising a main body (7) of a drilling machine, a main shaft (15) protruding from one end of the main body (7) of the drilling machine, and an end of the main shaft (15) is installed with a main shaft (15); A drill bit (16), characterized in that a dustproof device is installed at one end of the main body (7) of the drilling machine extending out of the main shaft (15); The dustproof device includes a dustproof cover body and a sealing plate, the dustproof cover body includes a first cover body (4), a second cover body (9) and a third cover body (12), the first cover body (12) The body (4) is a hollow cube with an open bottom surface, and the top surface of the first cover body (4) is provided with a plurality of radial strip-shaped through holes (19) in an annular array along the center of the top surface. Dust-proof cotton (20) is installed in the strip-shaped through holes (19), buckles (3) are symmetrically arranged at the bottom of the left and right outer sides of the first cover body (4), and the first cover body (4) ) is sleeved and fixed on the peripheral wall of the casing of the main body (7) of the drilling machine, the second cover (9) is installed inside the first cover (4), and the second cover (9) is The bottom surface is a hollow hemisphere with a horizontal surface and an open bottom surface. The peripheral wall of the second cover body (9) is provided with a plurality of rows of first arc-shaped through holes (11) that penetrate inside and outside the peripheral wall of the second cover body (9). The top center of the second cover (9) is sleeved and fixed on the peripheral wall of the casing of the main body (7) of the drilling machine, and a space is left between the outer peripheral wall of the second cover (9) and the inner peripheral wall of the first cover (4). distance, the bottom surface of the second cover body (9) is flush with the bottom surface of the first cover body (4), the bottom surface of the third cover body (12) whose diameter is smaller than that of the second cover body (9) is horizontal and the bottom surface is open A hollow hemispherical shape, the outer peripheral wall of the third cover body (12) is provided with a plurality of wind deflectors (10) radiating toward the lower part of the third cover body (12) in an annular array along the center of the top surface. A second arc-shaped through hole (14) penetrating the inside and outside of the peripheral wall of the third cover body (12) is provided between each two air guide plates (10), and the third cover body (12) is provided at the bottom circumference of the outer peripheral wall of the third cover body (12). There is a track (17), the center of the top of the third cover (12) is sleeved and fixed on the main shaft (15), and the top of the air deflector (10) on the third cover (12) and the second cover ( 9) There is a space between the inner peripheral walls; The sealing plate is composed of a left sealing plate (1) and a right sealing plate (21) with the same shape and size, and the left sealing plate (1) and the right sealing plate (21) are symmetrically installed on the first cover body (4). ) at the bottom surface opening, the opposite side of the left sealing plate (1) and the right sealing plate (21) is the inner side, the other side of the left sealing plate (1) and the right sealing plate (21) is the outer side, and the left sealing plate (1) and the right sealing plate (21) are the outside. The inner sides of the sealing plate (1) and the right sealing plate (21) are provided with semicircular grooves, and the outer sides are provided with locks (2) corresponding to the buckles (3) on the first cover body (4), so The circumferential surfaces of the semicircular grooves of the left sealing plate (1) and the right sealing plate (21) are provided with U-shaped grooves (23) whose openings are opposite and whose longitudinal cross-sections are U-shaped. A plurality of balls (18) are arranged at intervals in the U-shaped groove (23), and the inner sides of the left sealing plate (1) and the right sealing plate (21) outside both ends of the semi-circular groove are connecting surfaces, and Threaded holes (27) are arranged on the connecting surfaces, and bearing plates (22) are arranged at the semicircular grooves on the left sealing plate (1) and the right sealing plate (21). The bearing plates (22) ) is an arc-shaped plate body with the same arc as the semicircular groove, and a plurality of limit through holes ( 26), both ends of the bearing plate (22) are connected with a fixing plate (25) corresponding to the connecting surface, and the fixing plate (25) is provided with a countersunk hole corresponding to the threaded hole (27), the The convex outer arc surface of the carrier plate (22) is in contact with the circumferential surface of the semicircular groove, one side of the ball slidingly contacts the bottom surface of the U-shaped groove (23) where it is located, and the other side passes through the limit through hole (26). ) slidingly contacts the outer peripheral wall of the third cover body (12) at the track (17), the fixing plate (25) is fixed on the connecting surface by the connecting bolts (24) passing through the counterbore and the threaded hole (27), The bearing plates (22) of the left sealing plate (1) and the right sealing plate (21) are butted to form a circular through hole, and the latch (2) provided on the left sealing plate (1) and the first cover (4) are left on the left side. The retaining ring (3) on the side is locked, the semicircular groove on the left sealing plate (1) is clamped into the left side of the track (17) on the third cover (12), and the right sealing plate (21) is provided with The lock (2) on the right side of the first cover (4) is locked with the buckle (3) on the right side of the first cover (4), and the semicircular groove on the right sealing plate (21) is locked into the track on the third cover (12). (17) RIGHT. 2 . The dust-proof device for a glass fiber board drilling machine according to claim 1 , wherein the dust-proof cotton ( 20 ) is a sheet-like body made of polyethylene material. 3 . 3. The dust-proof device for a glass fiber board drilling machine according to claim 1, characterized in that, the center of the top of the first cover body (4) is provided with a first through hole (6) penetrating the lower and lower surfaces of the top surface. , the top center of the second cover body (9) is provided with a second through hole (8), the top center of the third cover body (12) is provided with a third through hole (5), and the first through hole (6) , the second through hole (8) and the third through hole (5) are holes on the same central axis. 4 . The dustproof device for a glass fiber board drilling machine according to claim 1 , wherein the plurality of rows of first arc through holes ( 11 ) provided on the peripheral wall of the second cover body ( 9 ) are horizontally arranged. 5 . , and are parallel to each other, and each row of the first arc-shaped through holes (11) is formed by a plurality of horizontal first arc-shaped through holes in an annular array. The dust-proof device for a glass fiber board drilling machine according to claim 1, characterized in that the bottom surface of the third cover body (12) is lower than the bottom surface of the second cover body (9) and higher than the main shaft (15). ) on top of the drill (16). 6 . The dust-proof device for a glass fiber board drilling machine according to claim 1 , wherein the air guide plate ( 10 ) is a plate body with a top surface and a bottom surface that are upwardly convex in an arc shape, and the wind guide plate ( 10 ) is 6 . The upper end of the plate is close to the center of the top surface of the third cover body (12), and the lower end extends toward the lower part of the third cover body (12). The inclination angles of the wind deflectors (10) in the plurality of annular arrays are the same, and the inclination directions are arranged clockwise or counterclockwise. 7 . The dust-proof device for a glass fiber board drilling machine according to claim 1 , wherein the track ( 17 ) comprises two circular rings corresponding up and down with the same diameter, and the inner part of the two circular rings The annular surfaces are fixed on the lower end of the outer peripheral wall of the third cover body (12), a space is left between the two annular rings, and the outer circumference of the third cover body (12) between the two annular rings and the two annular rings The wall constitutes the track (17). 8 . The dust-proof device for a glass fiber board drilling machine according to claim 7 , wherein the thicknesses of the left sealing plate ( 1 ) and the right sealing plate ( 21 ) are both smaller than two of the rails ( 17 ). The space left between the rings. 9 . The dust-proof device for a glass fiber board drilling machine according to claim 7 , wherein the lock ( 2 ) provided on the left sealing plate ( 1 ) and the left side of the first cover ( 4 ) are 9 . When the buckle (3) is locked, the top surface of the left sealing plate (1) is in contact with the bottom surfaces of the left sides of the first cover body (4) and the second cover body (9). 10 . The dust-proof device for a glass fiber board drilling machine according to claim 1 , wherein the upper end of the second arc-shaped through hole ( 14 ) is close to the center of the top surface of the third cover body ( 12 ), 10 . The lower end of the second arc-shaped through hole (14) extends toward the lower part of the third cover body (12).

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