CN111745456A

CN111745456A - Protective device for drilling machine

Info

Publication number: CN111745456A
Application number: CN202010578716.5A
Authority: CN
Inventors: 蒙正欢
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2020-10-09

Abstract

The invention relates to a protective device for a drilling machine, which comprises a workbench, a base, a top plate, a fixed box, a motor, a drill rod, a protective cover, a connecting mechanism, two cylinders, a water spraying mechanism and two noise reduction mechanisms, the water spraying mechanism comprises a water box, a water pumping component, a connecting box, a power component and a plurality of water spraying components, the water spray component comprises a connecting pipe and a nozzle, the noise reduction mechanism comprises an air cylinder, a piston, a hose, an air outlet pipe, a spring, a turntable and a driving wire, the protective device for the drilling machine realizes the function of spraying water to the inner wall of the protective cover through the water spraying mechanism, avoids the scraps from splashing to the inner wall of the protective cover to rebound to influence the punching work, improves the reliability of equipment, and through the noise reduction mechanism, the function of bleeding is carried out to the inside of protection casing, has reduced the propagation medium of noise to realized falling the function of making an uproar, avoided the noise too big and cause the threat to staff's healthy.

Description

Protective device for drilling machine

Technical Field

The invention relates to the field of machine tools, in particular to a protective device for a drilling machine.

Background

The drilling machine is a machine tool which mainly uses a drill to machine a hole on a workpiece. Typically the drill bit is rotated into a primary motion and the drill bit is moved axially into a feed motion. The drilling machine is simple in structure, relatively low in machining precision, capable of drilling through holes and blind holes, replacing special cutters, and capable of expanding, reaming or tapping and the like. In the machining process, the workpiece is fixed, the cutter moves, the center of the cutter is aligned with the center of the hole, and the cutter rotates (main motion). The drilling machine is characterized in that a workpiece is fixed and a cutter does rotary motion. The drilling machine generally shields the drill rod by arranging a protective cover, so that scraps generated during working are prevented from splashing on a user.

Current protection casing does not set up buffer usually, leads to the piece to splash and can bounce-back on the protection casing inner wall to can influence the work of punching, reduce the reliability of current protection casing, moreover, current protection casing is when using, owing to do not have silencing device, the noise that produces when leading to punching is all around excessive, thereby can cause the threat for staff's the healthy, thereby reduced the practicality of current protection casing.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: to overcome the deficiencies of the prior art, a guard for a drill press is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a protective device for a drilling machine comprises a workbench, a base, a top plate, a fixed box, a motor, a drill rod, a protective cover, a connecting mechanism and two cylinders, wherein the workbench is fixed above the base, cylinder bodies of the two cylinders are vertically fixed on two sides above the base respectively, gas rods of the two cylinders are fixedly connected with two ends of the top plate respectively, the fixed box is fixed below the top plate, a through hole is formed below the fixed box, the motor is fixed in the fixed box, the motor is in transmission connection with one end of the drill rod, the other end of the drill rod penetrates through the through hole and is arranged below the fixed box, a through hole is formed in the protective cover, the fixed box penetrates through the through hole, the connecting mechanism is arranged on the inner wall of the through hole, the protective cover is connected with the fixed box through the connecting mechanism, the drill rod is arranged in the protective cover, a PLC is arranged in, the motor and the cylinder are electrically connected with the PLC, the device also comprises a water spraying mechanism and two noise reduction mechanisms, the water spraying mechanism is arranged inside the fixed box, the two noise reduction mechanisms are respectively arranged on two sides of the fixed box, and the water spraying mechanism is connected with the noise reduction mechanisms;

the water spraying mechanism comprises a water box, a water pumping assembly, a connecting box, a power assembly and a plurality of water spraying assemblies, wherein the water box is fixed at the top in the fixed box, a water inlet is formed in the upper part of the water box, the water pumping assembly is arranged below the water box, the connecting box is fixed at the bottom in the fixed box and is connected with the water box through the water pumping assembly, the power assembly is arranged in the water box and is connected with the noise reduction mechanism, a plurality of round holes are formed in the lower part of the fixed box, the number of the round holes is equal to that of the water spraying assemblies, and the round holes correspond to the water spraying assemblies one by one;

the water spray assembly comprises a connecting pipe and a nozzle, one end of the connecting pipe is communicated with the lower part of the connecting box, the other end of the connecting pipe penetrates through the round hole to be arranged inside the protective cover, the other end of the connecting pipe is communicated with the nozzle, the nozzle is arranged towards the inner wall of the protective cover, and the connecting pipe is fixedly connected with the inner wall of the round hole;

the mechanism of making an uproar falls includes inflator, piston, hose, outlet duct, spring, carousel and drive wire, the inflator is fixed on fixed box, the piston sets up the inside at the inflator, the inner wall sealing connection of piston and inflator, the top of inflator is equipped with the aperture, the one end of drive wire and the top fixed connection of piston, the other end of drive wire passes the centre of a circle department fixed connection of keeping away from of aperture and carousel, the carousel is connected with power component, the both ends of spring are connected with the top of top and piston in the inflator respectively, one side and the outlet duct intercommunication of keeping away from fixed box of inflator, the inflator passes through hose and protection casing intercommunication.

As preferred, in order to realize the function of drawing water, the subassembly of drawing water includes suction pump, first connecting pipe and second connecting pipe, the suction pump is fixed in the below of water box, the suction pump communicates through the inside of first connecting pipe with the water box, the suction pump communicates through second connecting pipe and connecting box, the winding of second connecting pipe is on the motor, the suction pump is connected with the PLC electricity.

As preferred, in order to drive the carousel and rotate, power component includes kickboard, ball bearing, lead screw, worm, drive unit and two first bearings, and top and bottom in the water box are fixed respectively to two first bearings, the one end of lead screw and the one end of worm respectively with the inner circle fixed connection of two first bearings, the other end of lead screw and the other end fixed connection of worm, the worm passes through drive unit and is connected with the carousel, ball bearing cover is established on the lead screw, ball bearing's the junction with the lead screw is equipped with the screw thread that matches with the lead screw, kickboard and ball bearing's outer lane fixed connection.

Preferably, in order to transmit power, the transmission unit comprises a worm wheel, a transmission shaft and two second bearings, the two second bearings are respectively fixed on the inner walls of the two sides of the water box, the transmission shaft is fixedly connected with the inner rings of the second bearings, the worm wheel is fixed on the transmission shaft, the worm wheel is meshed with the worm, and the two ends of the transmission shaft are respectively fixedly connected with the circle centers of the two rotary tables.

Preferably, in order to limit the moving direction of the floating plate, the power assembly further comprises two guide rods, the guide rods are vertically fixed to the top of the water box, two ends of the floating plate are respectively sleeved on the two guide rods, and the floating plate is connected with the guide rods in a sliding mode.

Preferably, the lead screw is coated with an anti-corrosion zinc coating in order to prevent corrosion of the lead screw.

As preferred, for the convenience of the protection casing reciprocates, coupling mechanism includes a plurality of coupling assembling, coupling assembling includes connecting block and ball, one side circumference of connecting block is evenly fixed on fenestrate inner wall, be equipped with a plurality of recesses in the periphery of fixed box, the quantity of recess equals with the quantity of connecting block, recess and connecting block one-to-one, the opposite side setting of connecting block is in the inside of recess, the connecting block opposite side is equipped with the notch, the centre of sphere setting of ball is in the inside of notch, the ball supports with the inner wall of recess and leans on.

Preferably, in order to prevent the protective cover from being separated from the fixed box, the connecting mechanism further comprises a plurality of fixed blocks, the fixed blocks are circumferentially and uniformly fixed on the periphery of one end, close to the drill rod, of the fixed box, and the top in the protective cover abuts against the fixed blocks.

Preferably, in order to prevent debris from entering the interior of the hose, a filter screen is provided at the connection of the hose to the protective cover.

Preferably, in order to control the equipment to work, a key is arranged on the base and electrically connected with the PLC.

The protection device for the drilling machine has the advantages that the protection device for the drilling machine achieves the function of spraying water to the inner wall of the protective cover through the water spraying mechanism, the phenomenon that scraps splash on the inner wall of the protective cover to rebound to influence the punching work is avoided, the reliability of equipment is improved, compared with the existing water spraying mechanism, the water spraying mechanism can also cool the motor, the damage caused by overheating of the motor during punching is avoided, the function of exhausting air from the interior of the protective cover is achieved through the noise reduction mechanism, the propagation medium of noise is reduced, the noise reduction function is achieved, the threat to the body health of workers due to overlarge noise is avoided, compared with the existing noise reduction mechanism, the noise reduction mechanism and the water spraying mechanism are integrated into a linkage mechanism, the function of noise reduction can be achieved while water spraying is achieved, and the practicability of the equipment is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of a guard for a drill press of the present invention;

FIG. 2 is a schematic structural view of a water spray mechanism of the guard for a drill press of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic view of the connection structure of the protective cover and the fixing box of the protective device for the drilling machine of the invention;

in the figure: 1. the automatic water-saving device comprises a base, 2 parts of a workbench, 3 parts of a cylinder, 4 parts of a top plate, 5 parts of a fixing box, 6 parts of a motor, 7 parts of a drill rod, 8 parts of a protective cover, 9 parts of a water box, 10 parts of a first connecting pipe, 11 parts of a water pump, 12 parts of a second connecting pipe, 13 parts of a connecting box, 14 parts of a connecting pipe, 15 parts of a nozzle, 16 parts of a worm, 17 parts of a screw rod, 18 parts of a ball screw bearing, 19 parts of a floating plate, 20 parts of a worm wheel, 21 parts of a transmission shaft, 22 parts of a rotating disc, 23 parts of a driving wire, 24 parts of a piston, 25 parts of a spring, 26 parts of an air cylinder, 27 parts of an air outlet pipe, 28 parts of a hose, 29.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, a protection device for a drilling machine comprises a workbench 2, a base 1, a top plate 4, a fixed box 5, a motor 6, a drill rod 7, a protection cover 8, a connecting mechanism and two cylinders 3, wherein the workbench 2 is fixed above the base 1, the cylinder bodies of the two cylinders 3 are vertically fixed on two sides above the base 1 respectively, the air rods of the two cylinders 3 are fixedly connected with two ends of the top plate 4 respectively, the fixed box 5 is fixed below the top plate 4, a through hole is arranged below the fixed box 5, the motor 6 is fixed inside the fixed box 5, the motor 6 is in transmission connection with one end of the drill rod 7, the other end of the drill rod 7 passes through the through hole and is arranged below the fixed box 5, a through hole is arranged on the protection cover 8, the fixed box 5 passes through the through hole, the connecting mechanism is arranged on the inner wall of the through hole, the protection cover 8 is connected with the fixed box 5 through the connecting, the drill rod 7 is arranged inside the protective cover 8, the PLC is arranged in the base 1, the motor 6 and the air cylinder 3 are both electrically connected with the PLC, the drill rod further comprises a water spraying mechanism and two noise reduction mechanisms, the water spraying mechanism is arranged inside the fixed box 5, the two noise reduction mechanisms are respectively arranged on two sides of the fixed box 5, and the water spraying mechanism is connected with the noise reduction mechanisms;

PLCs, i.e., programmable logic controllers, are generally used for the processing of data and the receipt and output of instructions for central control. When punching, the staff places the work piece on workstation 2, and the button 33 is controlled again, and send signal gives PLC, and PLC control cylinder 3 starts for drilling rod 7 moves down, makes protection casing 8 support with the work piece and leans on, and the motor 6 that controls again starts, drives drilling rod 7 and rotates, makes drilling rod 7 carry out the work of punching to the work piece, and through sheltering from of protection casing 8, the piece that produces when avoiding punching splashes on one's body to the staff, thereby has improved the security of equipment.

This a protector for drilling machine passes through water spray mechanism, has realized the function to 8 inner walls of protection casing water sprays, avoids the piece to splash 8 inner walls of protection casing on rebound and influence the work of punching, has improved the reliability of equipment, through falling the mechanism of making an uproar, the function of bleeding to the inside of protection casing 8 has reduced the propagation medium of noise to realized the function of making an uproar of falling, avoided the noise too big and lead to the fact the threat to staff's healthy.

As shown in fig. 2-3, the water spraying mechanism includes a water box 9, a water pumping assembly, a connection box 13, a power assembly and a plurality of water spraying assemblies, the water box 9 is fixed at the top of the inside of the fixed box 5, a water inlet is arranged above the water box 9, the water pumping assembly is arranged below the water box 9, the connection box 13 is fixed at the bottom of the inside of the fixed box 5, the connection box 13 is connected with the water box 9 through the water pumping assembly, the power assembly is arranged inside the water box 9, the power assembly is connected with the noise reduction mechanism, a plurality of round holes are arranged below the fixed box 5, the number of the round holes is equal to the number of the water spraying assemblies, and the round holes correspond to the water spraying assemblies one to one;

the water spray assembly comprises a connecting pipe 14 and a nozzle 15, one end of the connecting pipe 14 is communicated with the lower part of the connecting box 13, the other end of the connecting pipe 14 penetrates through the circular hole and is arranged inside the protective cover 8, the other end of the connecting pipe 14 is communicated with the nozzle 15, the nozzle 15 faces the inner wall of the protective cover 8, and the connecting pipe 14 is fixedly connected with the inner wall of the circular hole;

when carrying out the water spray during operation, the control subassembly work of drawing water, with the leading-in inside of connecting box 13 of the water in the water box 9, in the leading-in nozzle 15 of rethread connecting pipe 14, make nozzle 15 spray water to 8 inner walls of protection casing, make and form the one deck water film on the inner wall of protection casing 8, the piece that produces when making a hole splashes can not rebound to the 8 inner walls of protection casing, but by water absorption on 8 inner walls of protection casing, thereby avoid piece rebound to influence the work of making a hole, the reliability of equipment has been improved, go on along with the work of spraying water, liquid level in the water box 9 descends gradually, make power component work, thereby can drive the work of mechanism of making an uproar.

As shown in fig. 2, the noise reduction mechanism includes inflator 26, piston 24, hose 28, outlet duct 27, spring 25, carousel 22 and drive wire 23, inflator 26 is fixed on fixed box 5, piston 24 sets up the inside at inflator 26, the inner wall sealing connection of piston 24 and inflator 26, the top of inflator 26 is equipped with the aperture, the one end of drive wire 23 and the top fixed connection of piston 24, the other end of drive wire 23 passes the centre of a circle department fixed connection of keeping away from of aperture and carousel 22, carousel 22 is connected with power component, the both ends of spring 25 are connected with the top of piston 24 in the inflator 26 respectively, the one side and the outlet duct 27 intercommunication of keeping away from fixed box 5 of inflator 26, inflator 26 passes through hose 28 and protection casing 8 intercommunication.

When the power assembly works, the rotating disc 22 is driven to rotate, so that the driving wire 23 drives the piston 24 to move up and down in the air cylinder 26, air in the protective cover 8 is led into the air cylinder 26 through the hose 28 and then is discharged from the air outlet pipe 27, the air content in the protective cover 8 is reduced, the transmission medium of noise is reduced, the noise reduction function is realized, the situation that the noise is too high and the physical health of workers is threatened is avoided, and the reliability of equipment is improved.

Preferably, in order to realize the function of drawing water, the subassembly of drawing water includes suction pump 11, first connecting pipe 10 and second connecting pipe 12, suction pump 11 is fixed in the below of water box 9, suction pump 11 communicates through the inside of first connecting pipe 10 with water box 9, suction pump 11 communicates with junction box 13 through second connecting pipe 12, second connecting pipe 12 twines on motor 6, suction pump 11 is connected with the PLC electricity.

When carrying out the water spray during operation, control suction pump 11 starts, the inside of the leading-in junction box 13 of water box 9 through first even pipe 10 and second even pipe 12, the leading-in nozzle 15 of rethread connecting pipe 14, make nozzle 15 spray water to 8 inner walls of protection casing, make and form the one deck water film on the inner wall of protection casing 8, the piece that produces when making punch splashes can not bounce-back on 8 inner walls of protection casing, but by water absorption on 8 inner walls of protection casing, thereby avoid piece bounce-back to influence the work of punching, the reliability of equipment has been improved, simultaneously because the second even pipe 12 twines on motor 6, thereby can take away the heat that produces on the motor 6, thereby realized the function to motor 6 cooling, avoid motor 6 overheated and damage, the security of equipment has been improved.

Preferably, in order to drive the rotary table 22 to rotate, the power assembly comprises a floating plate 19, a ball screw bearing 18, a screw rod 17, a worm 16, a transmission unit and two first bearings, the two first bearings are respectively fixed at the top and the bottom in the water box 9, one end of the screw rod 17 and one end of the worm 16 are respectively fixedly connected with inner rings of the two first bearings, the other end of the screw rod 17 is fixedly connected with the other end of the worm 16, the worm 16 is connected with the rotary table 22 through the transmission unit, the ball screw bearing 18 is sleeved on the screw rod 17, a connection part of the ball screw bearing 18 and the screw rod 17 is provided with threads matched with the screw rod 17, and the floating plate 19 is fixedly connected with an outer ring of the ball screw bearing 18.

Preferably, in order to transmit power, the transmission unit includes a worm wheel 20, a transmission shaft 21 and two second bearings, the two second bearings are respectively fixed on the inner walls of the two sides of the water box 9, the transmission shaft 21 is fixedly connected with the inner ring of the second bearings, the worm wheel 20 is fixed on the transmission shaft 21, the worm wheel 20 is meshed with the worm 16, and two ends of the transmission shaft 21 are respectively fixedly connected with the circle centers of the two rotating discs 22.

When the water spraying work is carried out, the liquid level in the water box 9 is gradually downward, so that the floating plate 19 moves downward, the ball screw bearing 18 is driven to move downward along the screw rod 17, the screw rod 17 rotates, the worm 16 is driven to rotate, the worm wheel 20 rotates through the meshing of the worm 16 and the worm wheel 20, the transmission shaft 21 is driven to rotate, the rotary table 22 rotates, the piston 24 is driven to move up and down in the air cylinder 26 through the driving wire 23, and the air suction function is realized.

Preferably, in order to limit the moving direction of the floating plate 19, the power assembly further comprises two guide rods 30, the guide rods 30 are vertically fixed at the top of the water box 9, two ends of the floating plate 19 are respectively sleeved on the two guide rods 30, and the floating plate 19 is slidably connected with the guide rods 30.

By providing the guide bar 30, the moving direction of the floating plate 19 is restricted, so that the ball screw bearing 18 does not rotate when moving along the screw 17, thereby improving the stability when the screw 17 rotates.

Preferably, in order to prevent the lead screw 17 from being corroded, the lead screw 17 is coated with an anti-corrosion zinc coating.

As shown in fig. 4, coupling mechanism includes a plurality of coupling assembling, coupling assembling includes connecting block 31 and ball 32, one side circumference of connecting block 31 is evenly fixed on fenestrate inner wall, be equipped with a plurality of recesses in the periphery of fixed box 5, the quantity of recess equals with the quantity of connecting block 31, recess and connecting block 31 one-to-one, the opposite side setting of connecting block 31 is in the inside of recess, connecting block 31 opposite side is equipped with the notch, ball 32's centre of sphere sets up in the inside of notch, ball 32 supports with the inner wall of recess and leans on.

Support when the protection casing 8 and the work piece and lean on the back, fixed box 5 continues the downstream for protection casing 8 and fixed box 5 take place relative movement, because connecting block 31 inlays in the recess, thereby has restricted the downward removal of fixed box 5, through setting up ball 32, has reduced the frictional force between connecting block 31 and the fixed box 5, thereby more smooth when making fixed box 5 remove.

Preferably, in order to prevent the protective cover 8 from being separated from the fixing box 5, the connecting mechanism further comprises a plurality of fixing blocks, the fixing blocks are circumferentially and uniformly fixed on the periphery of one end, close to the drill rod 7, of the fixing box 5, and the top in the protective cover 8 abuts against the fixing blocks.

Through setting up the fixed block, restricted protection casing 8's displacement, avoided protection casing 8 and fixed box 5 to break away from and influence the protecting effect.

Preferably, in order to avoid debris entering the interior of the hose 28, the hose 28 is provided with a sieve 29 at its connection to the hood 8.

By providing the screen 29, the function of cleaning is achieved, reducing the chance of debris entering the interior of the hose 28.

Preferably, in order to control the operation of the equipment, a key 33 is arranged on the base 1, and the key 33 is electrically connected with the PLC.

Through setting up button 33, can control equipment work, improved the intelligent degree of equipment.

When carrying out the water spray during operation, control suction pump 11 starts, the inside of the leading-in junction box 13 of water box 9 through first even pipe 10 and second even pipe 12, the leading-in nozzle 15 of rethread connecting pipe 14, make nozzle 15 spray water to 8 inner walls of protection casing, make and form the one deck water film on the inner wall of protection casing 8, the piece that produces when making punch splashes can not bounce-back on 8 inner walls of protection casing, but by water absorption on 8 inner walls of protection casing, thereby avoid piece bounce-back to influence the work of punching, the reliability of equipment has been improved, simultaneously because the second even pipe 12 twines on motor 6, thereby can take away the heat that produces on the motor 6, thereby realized the function to motor 6 cooling, avoid motor 6 overheated and damage, the security of equipment has been improved. When the water spraying work is carried out, the liquid level in the water box 9 is gradually downward, so that the floating plate 19 moves downward, the ball screw bearing 18 is driven to move downward along the screw rod 17, the screw rod 17 rotates, the worm 16 is driven to rotate, the worm wheel 20 rotates through the meshing of the worm 16 and the worm wheel 20, the transmission shaft 21 is driven to rotate, the rotary disc 22 rotates, the piston 24 is driven to move up and down in the air cylinder 26 through the driving wire 23, the air in the protective cover 8 is guided into the air cylinder 26 through the hose 28 and then is discharged from the air outlet pipe 27, the air content in the protective cover 8 is reduced, the transmission medium of noise is reduced, the noise reduction function is realized, the threat to the health of workers due to excessive noise is avoided, and the reliability of the equipment is improved.

Compared with the prior art, this a protector for drilling machine passes through water spray mechanism, the function of spraying water to 8 inner walls of protection casing has been realized, avoid the piece to splash 8 inner walls of protection casing on rebound and influence the work of punching, the reliability of equipment has been improved, compare with current water spray mechanism, this water spray mechanism can also cool down motor 6, motor 6 is overheated and damages when avoiding punching, through falling the mechanism of making an uproar, carry out the function of bleeding to the inside of protection casing 8, the propagation medium of noise has been reduced, thereby the function of making an uproar has been realized falling, avoid the too big and threat of causing the health of staff to the noise, compare with the current mechanism of making an uproar of falling, should fall the mechanism of making an uproar and water spray mechanism link gear as an organic whole, can also realize the function of making an uproar when realizing the water spray.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A protection device for a drilling machine comprises a workbench (2), a base (1), a top plate (4), a fixed box (5), a motor (6), a drill rod (7), a protective cover (8), a connecting mechanism and two cylinders (3), wherein the workbench (2) is fixed above the base (1), cylinder bodies of the two cylinders (3) are vertically fixed on two sides of the top of the base (1) respectively, air rods of the two cylinders (3) are fixedly connected with two ends of the top plate (4) respectively, the fixed box (5) is fixed below the top plate (4), a through hole is formed below the fixed box (5), the motor (6) is fixed inside the fixed box (5), the motor (6) is in transmission connection with one end of the drill rod (7), the other end of the drill rod (7) penetrates through the through hole to be arranged below the fixed box (5), a through hole is formed in the protective cover (8), the drilling machine is characterized by further comprising a water spraying mechanism and two noise reduction mechanisms, wherein the water spraying mechanism is arranged inside the fixed box (5), the two noise reduction mechanisms are respectively arranged on two sides of the fixed box (5), and the water spraying mechanism is connected with the noise reduction mechanisms;

the water spraying mechanism comprises a water box (9), a water pumping assembly, a connecting box (13), a power assembly and a plurality of water spraying assemblies, wherein the water box (9) is fixed at the top in the fixed box (5), a water inlet is formed in the upper part of the water box (9), the water pumping assembly is arranged below the water box (9), the connecting box (13) is fixed at the bottom in the fixed box (5), the connecting box (13) is connected with the water box (9) through the water pumping assembly, the power assembly is arranged in the water box (9), the power assembly is connected with the noise reduction mechanism, a plurality of round holes are formed in the lower part of the fixed box (5), the number of the round holes is equal to that of the water spraying assemblies, and the round holes correspond to the water spraying assemblies one to one;

the water spray assembly comprises a connecting pipe (14) and a nozzle (15), one end of the connecting pipe (14) is communicated with the lower part of the connecting box (13), the other end of the connecting pipe (14) penetrates through a circular hole to be arranged inside the protective cover (8), the other end of the connecting pipe (14) is communicated with the nozzle (15), the nozzle (15) faces the inner wall of the protective cover (8), and the connecting pipe (14) is fixedly connected with the inner wall of the circular hole;

the noise reduction mechanism comprises an air cylinder (26), a piston (24), a hose (28), an air outlet pipe (27), a spring (25), a rotary table (22) and a driving wire (23), the air cylinder (26) is fixed on a fixed box (5), the piston (24) is arranged inside the air cylinder (26), the piston (24) is in sealing connection with the inner wall of the air cylinder (26), a small hole is formed in the upper portion of the air cylinder (26), one end of the driving wire (23) is fixedly connected with the upper portion of the piston (24), the other end of the driving wire (23) penetrates through the small hole to be fixedly connected with the rotary table (22) far away from the circle center, the rotary table (22) is connected with a power assembly, the two ends of the spring (25) are respectively connected with the upper portion of the top in the air cylinder (26) and the upper portion of the piston (24), one side of the air cylinder (26) far away from the fixed box, the inflator (26) is communicated with the protective cover (8) through a hose (28).

2. The guard for drilling machine according to claim 1, characterized in that the water pumping assembly comprises a water pump (11), a first connecting pipe (10) and a second connecting pipe (12), the water pump (11) is fixed below the water box (9), the water pump (11) is communicated with the inside of the water box (9) through the first connecting pipe (10), the water pump (11) is communicated with the connecting box (13) through the second connecting pipe (12), the second connecting pipe (12) is wound on the motor (6), and the water pump (11) is electrically connected with the PLC.

3. Guard for drilling machine according to claim 1, characterized in that the power assembly comprises a float plate (19), a ball screw bearing (18), a screw (17), a worm (16), a transmission unit and two first bearings, which are fixed respectively at the top and at the bottom inside the water box (9), one end of the screw rod (17) and one end of the worm (16) are respectively and fixedly connected with the inner rings of the two first bearings, the other end of the screw rod (17) is fixedly connected with the other end of the worm (16), the worm (16) is connected with the turntable (22) through a transmission unit, the ball screw bearing (18) is sleeved on the screw rod (17), the joint of the ball screw bearing (18) and the screw rod (17) is provided with a thread matched with the screw rod (17), the floating plate (19) is fixedly connected with the outer ring of the ball screw bearing (18).

4. The guard for drilling machine according to claim 3, characterized in that the transmission unit comprises a worm wheel (20), a transmission shaft (21) and two second bearings, the two second bearings are respectively fixed on the inner walls of the two sides of the water box (9), the transmission shaft (21) is fixedly connected with the inner ring of the second bearings, the worm wheel (20) is fixed on the transmission shaft (21), the worm wheel (20) is meshed with the worm (16), and the two ends of the transmission shaft (21) are respectively fixedly connected with the circle centers of the two turntables (22).

5. The guard for the drilling machine according to claim 4, characterized in that the power assembly further comprises two guide rods (30), the guide rods (30) are vertically fixed on the top of the water box (9), two ends of the floating plate (19) are respectively sleeved on the two guide rods (30), and the floating plate (19) is slidably connected with the guide rods (30).

6. The guard for drilling machine according to claim 5, characterized in that the screw (17) is coated with an anti-corrosion zinc coating.

7. The protection device for the drilling machine according to claim 1, characterized in that the connecting mechanism comprises a plurality of connecting components, each connecting component comprises a connecting block (31) and a ball (32), one side of each connecting block (31) is circumferentially and uniformly fixed on the inner wall of a through hole, a plurality of grooves are formed in the periphery of the fixed box (5), the number of the grooves is equal to that of the connecting blocks (31), the grooves correspond to the connecting blocks (31) in a one-to-one mode, the other side of each connecting block (31) is arranged in the corresponding groove, a notch is formed in the other side of each connecting block (31), the center of each ball (32) is arranged in the corresponding notch, and each ball (32) abuts against the inner wall of each groove.

8. The protection device for a drilling machine according to claim 7, characterized in that said connection means further comprise a plurality of fixed blocks, said fixed blocks being circumferentially and uniformly fixed on the periphery of one end of the fixed box (5) close to the drill rod (7), the top inside said protection casing (8) being in abutment with the fixed blocks.

9. Guard for drilling machine according to claim 1, characterized in that the hose (28) is provided with a sieve (29) at its connection to the guard (8).

10. Guard for drilling machine according to claim 1, characterized in that the base (1) is provided with a key (33), the key (33) being electrically connected to the PLC.