CN212665199U - Fume extractor of laser cutting machine - Google Patents

Abstract

The utility model relates to a laser cutting machine's fume extractor, it includes the frame and the cover body, cover body coupling is at the frame top, the frame top is equipped with two air blowers, the exhaust column and the cover body intercommunication of air blower, the frame top is equipped with the mounting bracket, connecting in the mounting bracket of cover body liftable, the transversal rectangular internal backup pad that is equipped with of cover of personally submitting, the length of backup pad equals with the length of the cover body, the length direction and the cover body length direction of two backup pads are parallel and are close to respectively in cover body both sides, the backup pad top surface that is the level setting is equipped with can follow the gliding slider of backup pad length direction, the bar hole has all been seted up to cover body both sides, two bar holes are close to respectively in two backup pads, the bar hole of homonymy is located the slider top of homonymy, the length direction in bar hole is parallel with. This application has the effect that improves fume extractor's smoke exhaust efficiency.

Description

Fume extractor of laser cutting machine

Technical Field

The application relates to the field of laser cutting machines, in particular to a smoke exhaust device of a laser cutting machine.

Background

Laser cutting is to irradiate a workpiece with a focused high-power-density laser beam to quickly melt, vaporize and ablate the irradiated material or reach a burning point, and simultaneously blow off the molten material by means of a high-speed airflow coaxial with the beam, thereby realizing the cutting of the workpiece. Since the laser cutting method does not need to use a cutter, the laser cutting equipment is also very suitable for producing small batches of components with various sizes which cannot be processed originally, and the laser cutting device is also used by more and more manufacturers for production. However, in the laser processing process, a part of a processed workpiece is burnt or melted, so that a large amount of smoke is generated correspondingly, the smoke pollutes the environment, and the health of an operator is influenced.

The prior chinese utility model patent with publication number CN204893213U discloses a smoke exhaust device of a laser cutting machine, which comprises a frame, a workbench arranged on the frame, and an upper cover for covering the workbench, wherein a first smoke exhaust port and a second smoke exhaust port are symmetrically arranged on two sides of the upper cover; the first exhaust port is provided with a first exhaust fan, and the second exhaust port is provided with a second exhaust fan; outlets of the first exhaust fan and the second exhaust fan are respectively connected with a first exhaust pipe and a second exhaust pipe; two filter screens which are arranged at intervals are respectively arranged in the first exhaust pipe and the second exhaust pipe, and activated carbon is filled in the filter screens; the outlets of the first exhaust pipe and the second exhaust pipe are respectively connected with two inlets of the double-interface liquid filter, the outlet of the double-interface liquid filter is connected with the inlet of the smoke exhaust pipe, and the outlet of the smoke exhaust pipe extends out of the room.

In view of the above related technologies, the inventor believes that when the processing breadth of the laser cutting machine is large, if the distance between the position where smoke is generated by the processing piece and the smoke exhaust port is long, the smoke exhaust device needs to work for a certain time to exhaust the smoke, which results in the defect that the smoke exhaust efficiency of the smoke exhaust device is reduced.

SUMMERY OF THE UTILITY MODEL

In order to improve fume extractor's fume extraction efficiency, this application provides a laser cutting machine's fume extractor.

The application provides a laser cutting machine's fume extractor adopts following technical scheme:

a smoke exhaust device of a laser cutting machine comprises a frame and a cover body, wherein the cover body is connected to the top of the frame, two exhaust fans are arranged at the top of the frame, an exhaust pipe of each exhaust fan is communicated with the cover body, a mounting frame is arranged at the top of the frame, the cover body is connected to the mounting frame in a lifting manner, the cross section of the cover body is rectangular, two support plates are arranged in the cover body, the length of each support plate is equal to that of the cover body, the length directions of the two support plates are parallel to the length direction of the cover body and are respectively close to two sides of the cover body, a sliding block capable of sliding along the length direction of the support plates is arranged on the top surface of the support plates which are horizontally arranged, strip-shaped holes are respectively formed in two sides of the cover body, the strip-shaped holes in, one end of the exhaust pipe of the exhaust fan, which is far away from the exhaust fan, penetrates through the strip-shaped hole and is connected with the top surface of the sliding block.

Through adopting above-mentioned technical scheme, the cover body descends and covers and establish laser cutting machine after, according to the position that the machined part produced smog, workman's control slide block moves along the backup pad, and then adjusts the position of exhaust column, and the bar hole provides gliding position for the exhaust column to make the air intake of exhaust column be close to in the position that the machined part produced smog, shortened the smoke exhaust time, thereby improved fume extractor's fume extraction efficiency.

Preferably, the top surface of the supporting plate is provided with a first driving assembly, and the first driving assembly used for driving the sliding block to move back and forth along the supporting plate is connected with the sliding block.

Through adopting above-mentioned technical scheme, the workman is through the sliding position of first drive assembly control slider to the workman's operation of being convenient for makes that the slider can be better slides in the backup pad.

Preferably, first drive assembly includes servo motor, lead screw, guide bar and two relative mounting panels, servo motor is fixed in the backup pad top surface and is close to in backup pad one of them end, is two of vertical setting the mounting panel is fixed in the backup pad top surface, one of them the mounting panel is close to in servo motor, another the mounting panel is close to in the backup pad one end of keeping away from servo motor, is the level setting the lead screw both ends are rotated respectively and are connected in two mounting panels, servo motor's output shaft passes the mounting panel that is close to servo motor and is connected with the lead screw, is the level setting the guide bar both ends are fixed in two mounting panels respectively, the guide bar is located to the slider cover and with lead screw threaded connection.

Through adopting above-mentioned technical scheme, the workman controls servo motor, and servo motor's output shaft drive lead screw rotates, and pivoted lead screw drives the slider along guide bar reciprocating motion, the position of regulation slider that can be better to the workman of being convenient for produces the position control exhaust column of smog according to the machined part.

Preferably, the top surface of the sliding block is provided with a second driving piece, and the second driving piece used for adjusting the length of the exhaust pipe extending into the cover body is connected with the exhaust pipe.

Through adopting above-mentioned technical scheme, the workman controls the second driving piece and can adjust the length that the exhaust column stretches into the cover body, and then makes the exhaust column can be closer to the position that the machined part produced smog to improve smoke exhaust efficiency.

Preferably, the cover body is equipped with two relative sliding sleeves, two sliding sleeves sliding connection respectively in two bar holes, the exhaust fan is kept away from to the exhaust column one end sliding connection in sliding sleeve.

Through adopting above-mentioned technical scheme, the sliding sleeve provides the position of installation for the exhaust column can be better slide along the length direction in bar hole, also can be better adjust the length that the exhaust column stretched into the cover body.

Preferably, the strip-shaped hole is provided with a shielding component for reducing smoke leakage, and the shielding component is connected with the sliding sleeve.

Through adopting above-mentioned technical scheme, shelter from the condition that the subassembly can reduce smog and leak from the bar hole to be favorable to reducing the pollution that smog caused.

Preferably, it includes two automatic wind-up rolls and two shielding belts to shelter from the subassembly, is two of vertical setting automatic wind-up roll is installed in the side at the internal corresponding bar hole place of cover, two automatic wind-up roll is close to respectively in the both ends in bar hole, two shielding belt's wherein one end is connected respectively in two automatic wind-up rolls, shielding belt keeps away from the one end of automatic wind-up roll and connects in the lateral wall of sliding sleeve, shielding belt's width is greater than the width in bar hole, shielding belt is close to the side in bar hole and the internal side butt of the cover at bar hole place.

Through adopting above-mentioned technical scheme, two shelter from the area and have the trend of rolling under automatic wind-up roll's control, when the sliding sleeve removed, one of them sheltered from the area and shortens because the rolling, and another shelters from the area and then overcomes the trend of rolling and extend, and two shelter from the area and stretch out the sum of the length of corresponding automatic wind-up roll for the definite value to sheltering from the bar hole effectively when having guaranteed that the sliding sleeve can slide smoothly.

Preferably, the bar-shaped hole is provided with a guide component for enhancing the blocking effect of the blocking belt, and the blocking belt is connected to the guide component in a sliding manner.

Through adopting above-mentioned technical scheme, the direction subassembly can make the cover body medial surface at sheltering from area and bar hole place more laminate to the reinforcing shelters from separating of area and keeps off the effect.

In summary, the present application includes at least one of the following beneficial technical effects:

1. after the cover body descends and covers the laser cutting machine, according to the position that the machined part produced smog, workman's control slide block moved along the backup pad, and then adjusted the position of exhaust column, and the bar hole provides gliding position for the exhaust column to make the air intake of exhaust column be close to in the position that the machined part produced smog, shortened the time of discharging fume, thereby improved fume extractor's fume extraction efficiency.

2. The workman controls servo motor, and servo motor's output shaft drive lead screw rotates, and pivoted lead screw drives the slider along guide bar reciprocating motion, the position of regulation slider that can be better to the workman of being convenient for produces the position control exhaust column of smog according to the machined part.

3. Two shelter from the area have the trend of rolling under automatic wind-up roll's control, and when the sliding sleeve removed, one of them sheltered from the area and shortened because the rolling, and another shelters from the area and then overcomes the trend of rolling and extend, and two shelter from the area and stretch out the sum of the length of corresponding automatic wind-up roll for the definite value to sheltered from the bar hole effectively when having guaranteed that the sliding sleeve can slide smoothly.

Drawings

Fig. 1 is a schematic view of the overall structure of a smoke evacuation device of a laser cutting machine according to this embodiment.

Fig. 2 is a sectional view of a smoke evacuation device of a laser cutting machine according to the present embodiment.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

Fig. 4 is another angle sectional view of the smoke evacuation device of the laser cutting machine according to the present embodiment.

Description of reference numerals: 1. a frame; 11. a mounting frame; 111. a connecting plate; 112. a second support bar; 113. a first cylinder; 12. an exhaust fan; 121. an exhaust pipe; 13. a top plate; 14. a first support bar; 2. a cover body; 21. a cover plate; 22. a long plate; 221. a strip-shaped hole; 222. a sliding sleeve; 2221. a bump; 223. a chute; 23. a short plate; 3. a laser cutting machine; 4. a support plate; 41. a slider; 411. a groove; 412. a connecting rod; 5. a first drive assembly; 51. a servo motor; 52. a screw rod; 53. a guide bar; 54. mounting a plate; 6. a second cylinder; 7. a shielding component; 71. an automatic wind-up roll; 72. a masking tape; 8. connecting sheets; 9. a guide assembly; 91. an upper fastener; 92. a lower fastener; 10. a gas filter; 101. and (4) exhausting the gas.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses laser cutting machine's fume extractor. Referring to fig. 1, a fume extractor of laser cutting machine, including frame 1 that is used for placing laser cutting machine 3 and the cover body 2 that is used for covering laser cutting machine 3, 1 top of frame is equipped with mounting bracket 11, and connecting in mounting bracket 11 and being located laser cutting machine 3 of the cover body 2 liftable, 1 top of frame is equipped with two air blowers 12, and exhaust column 121 and the cover body 2 intercommunication of air blower 12 are used for discharging smog.

Referring to fig. 1, frame 1 includes roof 13 and four first bracing pieces 14, four first bracing pieces 14 are vertical setting, the bottom butt of first bracing piece 14 in ground, roof 13 is the level setting, and the bottom surface of roof 13 is fixed in the top of four first bracing pieces 14, four first bracing pieces 14 are close to four angle departments in roof 13 bottom surface respectively, laser cutting machine 3 places in roof 13 top surface, mounting bracket 11 sets up in roof 13 top surface, cover body 2 is located roof 13 top, air exhauster 12 is located roof 13 top surface and is close to mounting bracket 11.

Referring to fig. 1, the mounting frame 11 includes a connecting plate 111 and two second supporting rods 112, the two second supporting rods 112 are vertically disposed, bottom ends of the second supporting rods 112 are fixed to a top surface of the top plate 13, the laser cutting machine 3 is located between the two second supporting rods 112, a connecting line between the two second supporting rods 112 has a length greater than that of the laser cutting machine 3, the connecting plate 111 is disposed in a horizontal rectangular plate shape, and both ends of the connecting plate 111 are respectively fixed at the top ends of the two second support rods 112, the connecting plate 111 is positioned above the laser cutting machine 3, the top surface of the connecting plate 111 is provided with a first cylinder 113, the piston rod of the first cylinder 113 vertically and downwardly penetrates through the connecting plate 111, the top of the cover body 2 is fixed at one end of the piston rod of the first cylinder 113, which is far away from the first cylinder 113, thereby realize the lift function of cover body 2, the length direction of cover body 2 is parallel with the length direction of laser cutting machine 3.

Referring to fig. 1, the cover 2 includes a cover plate 21, two opposite long plates 22 and two opposite short plates 23, the cover plate 21 is horizontally disposed and has a rectangular plate shape, the top surface of the cover plate 21 is fixed to the end of the piston rod of the first cylinder 113, the length direction of the cover plate 21 is parallel to the length direction of the laser cutting machine 3, and the area of the cover plate 21 is larger than the area of the laser cutting machine 3. The long plate 22 is rectangular plate-shaped and is arranged, the long edges of the two long plates 22 are fixed on the bottom surface of the cover plate 21, the two long plates 22 are close to the two long edges of the bottom surface of the cover plate 21 respectively, the length direction of the long plate 22 is parallel to the length direction of the cover plate 21, the length of the long plate 22 is equal to that of the cover plate 21, and the two exhaust pipes 121 are communicated with the two long plates 22 respectively. The short plates 23 are rectangular plate-shaped, two ends of the short plates 23 are respectively fixed on two side faces of the two long plates 22 which are close to each other, and the two short plates 23 are respectively close to two short edges of the cover plate 21. The width of long board 22 equals with the width of short board 23, and when cover body 2 covers and establishes laser cutting machine 3, the bottom of long board 22 and the bottom of short board 23 all with roof 13 top surface butt, and laser cutting machine 3's display screen (not drawn in the figure) is located outside cover body 2, and the workman of being convenient for judges the position that the machined part produced smog.

Referring to fig. 2, two sides that long slab 22 is close to each other all are equipped with backup pad 4 that are the level setting, when laser cutting machine 3 was established to the cover body 2 cover, backup pad 4 is located laser cutting machine 3's top, backup pad 4 is rectangular platelike, and backup pad 4's both ends respectively with two short slab 23 butts, backup pad 4's length direction is parallel with long slab 22's length direction, 4 top surfaces of backup pad are equipped with can follow the gliding slider 41 of 4 length direction of backup pad, long slab 22 has seted up bar hole 221, the bar hole 221 of homonymy is located the slider 41 top of homonymy, the length direction of bar hole 221 is parallel with the length direction of backup pad 4, exhaust pipe 121 keeps away from the one end of air exhauster 12 and passes bar hole 221 and is connected with slider 41 top surface, exhaust pipe 121 passes bar hole 221 sliding. After the cover body 2 descends and covers the laser cutting machine 3, according to the position of the machined part producing smoke, the worker controls the sliding block 41 to move along the supporting plate 4, and then adjusts the position of the exhaust pipe 121, the strip-shaped hole 221 provides a sliding position for the exhaust pipe 121, so that the air inlet of the exhaust pipe 121 is close to the position of the machined part producing smoke, the smoke exhaust time is shortened, and the smoke exhaust efficiency of the smoke exhaust device is improved.

Referring to fig. 3, in order to better slide at bar hole 221 for exhaust pipe 121, two relative chutes 223 have been seted up at bar hole 221 pore wall, two chutes 223 are just right from top to bottom, the length direction of chute 223 is parallel with the length direction of bar hole 221, be equipped with at rectangular plate 22 and be circular tube shaped sliding sleeve 222, the length direction of sliding sleeve 222 is perpendicular with the length direction of bar hole 221, the sliding sleeve 222 lateral wall is equipped with two relative lugs 2221, two lugs 2221 are sliding connection respectively in two chutes 223, exhaust pipe 121 wears to establish the one end sliding connection of bar hole 221 in sliding sleeve 222 and be and stretch into the setting of cover body 2. The sliding sleeve 222 provides a mounting location for the exhaust pipe 121, so that the exhaust pipe 121 can slide along the length direction of the bar-shaped hole 221 better.

Referring to fig. 4, in order to better control the sliding position of the sliding block 41, a first driving assembly 5 is disposed on the top surface of the supporting plate 4, and the first driving assembly 5 is connected to the sliding block 41 for driving the sliding block 41 to reciprocate along the supporting plate 4. The worker controls the sliding position of the slider 41 through the first driving assembly 5, thereby facilitating the worker's operation.

Referring to fig. 3 and 4, the first driving assembly 5 includes a servo motor 51, a screw 52, a guide rod 53 and two opposite mounting plates 54, the servo motor 51 is fixed on the top surface of the support plate 4 and close to one end of the support plate 4, the mounting plates 54 are vertically disposed, the two mounting plates 54 are fixed on the top surface of the support plate 4, one of the mounting plates 54 is close to the servo motor 51, and the other mounting plate 54 is close to one end of the support plate 4 far away from the servo motor 51. The screw rod 52 is horizontally arranged, two ends of the screw rod 52 are respectively and rotatably connected to two side faces of the two mounting plates 54, which are close to each other, and an output shaft of the servo motor 51 penetrates through the mounting plates 54 close to the servo motor 51 and is connected with the screw rod 52. The guide rod 53 is horizontally disposed, two ends of the guide rod 53 are respectively fixed to two side surfaces of the two mounting plates 54 close to each other, and the slide block 41 is sleeved on the guide rod 53 and is in threaded connection with the screw rod 52. The workman controls servo motor 51, and servo motor 51's output shaft drive lead screw 52 rotates, and pivoted lead screw 52 drives slider 41 along guide bar 53 reciprocating motion, the position of the better regulation slider 41 of ability, and then the better position of adjusting sliding sleeve 222 to the position of the exhaust column 121 is adjusted according to the position that the machined part produced smog to the workman of being convenient for.

Referring to fig. 3, the top surface of the sliding block 41 is provided with a second driving member for adjusting the length of the exhaust pipe 121 extending into the cover 2. The workman controls the length that the second driving piece can adjust exhaust column 121 and stretch into cover body 2, and then makes exhaust column 121 more be close to the position that the machined part produced smog to improve smoke exhaust efficiency.

Referring to fig. 3, a groove 411 is formed in the top surface of the slider 41, the length direction of the groove 411 is perpendicular to the length direction of the support plate 4, a connecting rod 412 vertically disposed is slidably connected in the groove 411, the top end of the connecting rod 412 extends out of the groove 411, the top end of the connecting rod 412 is fixedly connected with the outer side wall of the exhaust pipe 121, the connecting rod 412 is close to one end of the exhaust pipe 121 located in the cover body 2, the second driving member is a second cylinder 6, the second cylinder 6 is located between the exhaust pipe 121 and the slider 41, the second cylinder 6 is close to the strip-shaped hole 221, the length direction of the piston rod of the second cylinder 6 is parallel to the length direction of the groove 411, the end of the piston rod of the second cylinder 6 is fixedly, for driving the connecting rod 412 to slide along the groove 411, so that the exhaust pipe 121 can slide in the sliding sleeve 222 for a certain distance, thereby adjusting the length of the exhaust pipe 121 extending into the housing 2.

Referring to fig. 3, in order to reduce the leakage of smoke from the strip-shaped hole 221, the shielding assembly 7 is disposed at the strip-shaped hole 221, which is beneficial to reducing air pollution caused by smoke.

Referring to fig. 3, the shielding assembly 7 includes two automatic winding rollers 71 and two shielding tapes 72, the automatic winding rollers 71 are vertically disposed, the two automatic winding rollers 71 are fixed on the side of the long plate 22 close to the supporting plate 4, the two automatic winding rollers 71 are close to two ends of the strip-shaped hole 221 respectively, the strip-shaped hole 221 is located on the central connecting line of the two automatic winding rollers 71, the outer side wall of the sliding sleeve 222 is provided with two opposite connecting pieces 8, the connecting pieces 8 are vertically disposed and located in the cover body 2 for providing connecting positions for the shielding tapes 72, the connecting pieces 8 are parallel to the long plate 22, the side of the connecting pieces 8 close to the long plate 22 is abutted to the long plate 22, one end of each of the two shielding tapes 72 is connected to the two automatic winding rollers 71, one end of the shielding tapes 72 far from the automatic winding rollers 71 is fixed to the sliding sleeve 222 and the two connecting pieces 8, the thickness of the, the width of the masking tape 72 is larger than the width of the strip-shaped hole 221, and the side surface of the masking tape 72 close to the strip-shaped hole 221 abuts against the long plate 22. The two shielding belts 72 have a winding trend under the control of the automatic winding roller 71, when the sliding block 41 drives the sliding sleeve 222 to move, one shielding belt 72 is wound into the corresponding automatic winding roller 71 due to the fact that the shielding belt conforms to the winding trend, the other shielding belt 72 overcomes the winding trend and continuously extends out of the corresponding automatic winding roller 71, and the sum of the lengths of the two shielding belts 72 extending out of the corresponding automatic winding roller 71 is a constant value, so that the sliding sleeve 222 can smoothly slide, and meanwhile, the strip-shaped hole 221 can be effectively shielded.

Referring to fig. 4, in order to enhance the blocking effect of the blocking belts 72, a guide assembly 9 is disposed on the side surface of the long plate 22 close to the support plate 4, and both the blocking belts 72 are slidably connected to the guide assembly 9. The guide assembly 9 enhances the fit of the shade strip 72 to the elongated panel 22.

Referring to fig. 3, guide assembly 9 includes a plurality of upper fasteners 91 and a plurality of lower fasteners 92, upper fasteners 91 are the setting of letter of falling L, a plurality of horizontal parts of upper fasteners 91 are fixed in the side that long plate 22 is close to backup pad 4, and a plurality of upper fasteners 91 are arranged along the length direction interval in strip-shaped hole 221, upper fasteners 91 are located the top that shelters from area 72, there is certain clearance in the vertical portion of upper fasteners 91 and the side that long plate 22 is close to backup pad 4, shelter from area 72 top side sliding connection in this clearance, thereby the laminating degree of sheltering from area 72 top side and long plate 22 has been strengthened. Lower fastener 92 is the setting of L font, and a plurality of horizontal parts of lower fastener 92 are fixed in the side that long slab 22 is close to backup pad 4, and a plurality of lower fasteners 92 are along the length direction spaced arrangement in strip-shaped hole 221, and lower fastener 92 is located the below of sheltering from area 72, goes up fastener 91 and lower fastener 92 and is just right from top to bottom, and there is certain clearance in the vertical portion of lower fastener 92 and the side that long slab 22 is close to backup pad 4, shelters from area 72 bottom side sliding connection in this clearance to sheltering from the laminating degree of taking 72 bottom side and long slab 22 to having strengthened.

Referring to fig. 1, in order to reduce air pollution, an air filter 10 is disposed on the top surface of a top plate 13 of a housing 1, two air outlet pipes of two exhaust fans 12 are respectively communicated with two air inlets of the air filter 10, and an air outlet pipe 101 is connected to an air outlet of the air filter 10 for discharging purified air into a room.

The implementation principle of the smoke exhaust device of the laser cutting machine is as follows: before the laser cutting machine 3 operates, the first air cylinder 113 is controlled to lower the cover body 2 and cover the laser cutting machine 3, and at the moment, a display screen of the laser cutting machine 3 is positioned outside the cover body 2; laser cutting machine 3 during operation, open two air blowers 12, then judge the position that the machined part produced smog through the information of display screen, control two servo motor 51, servo motor 51's output shaft drive lead screw 52 rotates, pivoted lead screw 52 drives slider 41 and removes along guide bar 53, and then adjust the position that exhaust column 121 stretched into cover body 2 one end, order about the mouth of pipe that exhaust column 121 stretched into cover body 2 one end and more be close to in the position that produces smog, the second cylinder 6 of controlling again, adjust the length that exhaust column 121 stretched into cover body 2, and then make the one end that exhaust column 121 stretched into cover body 2 more be close to in the position that produces smog, the in-process of discharging fume, shelter from area 72 and shelter from bar hole 221 all the time, smoke leakage is reduced, thereby smoke exhaust time has been shortened, thereby smoke exhaust efficiency of fume extractor has been improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a laser cutting machine's fume extractor, includes frame (1) and the cover body (2), the cover body (2) are connected in frame (1) top, frame (1) top is equipped with two air exhauster (12), exhaust column (121) and the cover body (2) intercommunication of air exhauster (12), its characterized in that: the top of the rack (1) is provided with a mounting rack (11), the cover body (2) can be lifted and lowered and is connected to the mounting rack (11), the cross section of the cover body (2) is rectangular, two support plates (4) are arranged in the cover body (2), the length of each support plate (4) is equal to that of the cover body (2), the length directions of the two support plates (4) are parallel to the length direction of the cover body (2) and are respectively close to two sides of the cover body (2), the top surface of each support plate (4) is horizontally provided with a sliding block (41) capable of sliding along the length direction of the support plate (4), strip-shaped holes (221) are respectively formed in two sides of the cover body (2), the strip-shaped holes (221) are respectively close to the two support plates (4), the strip-shaped holes (221) on the same side are positioned above the sliding blocks (41) on the same side, one end, far away from the exhaust fan (12), of the exhaust pipe (121) of the exhaust fan (12) penetrates through the strip-shaped hole (221) and is connected with the top surface of the sliding block (41).

2. The smoke evacuation apparatus for a laser cutting machine according to claim 1, wherein: the top surface of the supporting plate (4) is provided with a first driving component (5) which is used for driving the sliding block (41) to reciprocate along the supporting plate (4), and the first driving component (5) is connected with the sliding block (41).

3. The smoke evacuation apparatus for a laser cutting machine according to claim 2, wherein: first drive assembly (5) are including servo motor (51), lead screw (52), guide bar (53) and two relative mounting panel (54), servo motor (51) are fixed in backup pad (4) top surface and are close to backup pad (4) wherein one end, are two of vertical setting mounting panel (54) are fixed in backup pad (4) top surface, one of them mounting panel (54) are close to servo motor (51), another mounting panel (54) are close to the one end of keeping away from servo motor (51) in backup pad (4), are the level setting lead screw (52) both ends are rotated respectively and are connected in two mounting panel (54), the output shaft of servo motor (51) passes mounting panel (54) that are close to servo motor (51) and are connected with lead screw (52), are the level setting guide bar (53) both ends are fixed in two mounting panel (54) respectively, the sliding block (41) is sleeved on the guide rod (53) and is in threaded connection with the screw rod (52).

4. The smoke evacuation apparatus for a laser cutting machine according to claim 1, wherein: and a second driving piece is arranged on the top surface of the sliding block (41), and the second driving piece is connected with the exhaust pipe (121) and is used for adjusting the length of the exhaust pipe (121) extending into the cover body (2).

5. The smoke evacuation apparatus for a laser cutting machine according to claim 1, wherein: the cover body (2) is provided with two opposite sliding sleeves (222), the two sliding sleeves (222) are respectively connected with the two strip-shaped holes (221) in a sliding mode, the sliding sleeves (222) are connected with the top face of the sliding block (41), and one end, far away from the exhaust fan (12), of the exhaust pipe (121) is connected with the sliding sleeves (222) in a sliding mode.

6. The smoke evacuation apparatus for a laser cutting machine according to claim 5, wherein: the shielding component (7) used for reducing smoke leakage is arranged at the position of the strip-shaped hole (221), and the shielding component (7) is connected with the sliding sleeve (222).

7. The smoke evacuation apparatus for a laser cutting machine according to claim 6, wherein: shelter from subassembly (7) and include two automatic wind-up roll (71) and two and shelter from area (72), be two of vertical setting automatic wind-up roll (71) are installed in the side at cover body (2) corresponding bar hole (221) place, two automatic wind-up roll (71) are close to respectively in the both ends of bar hole (221), two wherein one end of sheltering from area (72) is connected respectively in two automatic wind-up roll (71), the one end that automatic wind-up roll (71) were kept away from in sheltering from area (72) is connected in the lateral wall of sliding sleeve (222), the width that shelters from area (72) is greater than the width of bar hole (221), shelter from the side that area (72) are close to bar hole (221) and cover body (2) medial surface butt that bar hole (221) are located.

8. The smoke evacuation apparatus for a laser cutting machine according to claim 7, wherein: the position of the strip-shaped hole (221) is provided with a guide component (9) used for enhancing the blocking effect of the blocking belt (72), and the blocking belt (72) is connected to the guide component (9) in a sliding mode.

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