CN211360792U - Milling machine for processing surface of elevator door panel - Google Patents

Abstract

The utility model relates to an elevator part mills the field, specifically discloses an elevator door panel surface machining milling machine. The milling cutter is fixed on the rotating shaft, an outer cover is arranged on the periphery of the rotating shaft, a negative pressure cavity is formed in the outer cover, and a negative pressure pipe communicated with the negative pressure cavity is fixed on the upper portion of the outer cover; the dustcoat lateral wall is equipped with annular holding tank, and the opening of holding tank is equipped with the brush roller down, and the holding tank internal level is equipped with, but the brush roller rotates with the holding tank to be connected and vertical slip, is fixed with the brush hair on the brush roller, and the brush roller top is equipped with the connecting rod, and the connecting rod rotates with the brush roller to be connected, is fixed with the gear on the brush roller, and the holding tank lateral wall is vertical to be fixed with gear engagement's rack. The utility model provides a milling machine can in time clear away the sweeps that produce to avoid the door plant to be scraped the flower.

Description

Milling machine for processing surface of elevator door panel

Technical Field

The utility model relates to an elevator part mills the field, especially relates to an elevator door panel surface machining milling machine.

Background

The surface of the door plate of the elevator needs to have good flatness, so the door plate needs to be milled when being processed. The milling machine generally comprises a milling mechanism, a moving mechanism for driving the milling mechanism to slide, and the like, wherein the milling mechanism comprises a milling cutter, and the milling cutter rotates during working to mill the door panel.

But the in-process of milling can produce more sweeps, and the sweeps that produce can drop on milling machine and the subaerial around the milling machine, and in the course of taking off from the milling machine at course of working and processing completion, the door plant easily with the milling machine and with the ground contact around the milling machine, the sweeps that produce also can contact with the door plant simultaneously and when removing the door plant, the sweeps takes place the friction with the door plant, forms the mar on the door plant surface.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an elevator door panel surface machining milling machine of sweeps that in time drive the production to avoid the door plant to be scraped the flower.

In order to achieve the above purpose, the technical scheme of the utility model is that: elevator door panel surface processing milling machine, including pivot, milling cutter and driving piece, the pivot transversely sets up and driving piece drive pivot rotates, and milling cutter fixes in the pivot, and the pivot periphery is equipped with the dustcoat, is equipped with the negative pressure chamber that the opening is down in the dustcoat, and milling cutter is located the negative pressure intracavity and the milling cutter lower extreme is less than the dustcoat lower extreme, and dustcoat upper portion is fixed with the negative pressure pipe with negative pressure chamber intercommunication.

The beneficial effect of this scheme does:

1. can make the negative pressure intracavity form the negative pressure behind the device intercommunication that can produce the negative pressure with negative pressure pipe and external, make the gaseous negative pressure pipe discharge of following around the milling cutter, gaseous wrapping up in the piece that produces of milling process along with discharging from the negative pressure pipe to avoid the piece to stop around the door plant, form the mar on the door plant.

2. The bottom of dustcoat is higher than the door plant, forms the mar on the door plant when avoiding dustcoat bottom and door plant to take place to contact.

Further, the dustcoat lateral wall is equipped with annular holding tank, the opening of holding tank is down, and the level is equipped with a plurality of brush rollers in the holding tank, the quantity of brush roller the same with the lateral wall quantity of dustcoat and with the lateral wall one-to-one of dustcoat, but the brush roller rotates with the holding tank to be connected and vertical slip, is fixed with the brush hair on the brush roller, and the brush roller top is equipped with the connecting rod, and the connecting rod rotates with the brush roller to be connected, is fixed with the gear on the brush roller, the vertical rack that is fixed with gear engagement of holding tank lateral wall.

The beneficial effect of this scheme does: 1. the brush hair stretches out from the opening of holding groove, plays the effect that blocks to the piece that mills the production, avoids the piece transversely to fall out the scope of dustcoat, leads to unable following the negative pressure pipe and discharges.

2. After the brush hair was used for a long time, the piece is easily blocked into to the brush hair content that is located the dustcoat below to make the piece form the mar on the door plant, the brush roller in this scheme is rotatable, can rotate the clastic brush hair of card income to the holding tank in no longer with the door plant contact, further avoid forming the mar on the door plant.

Furthermore, a pushing piece for pushing the connecting rod to move vertically is fixed on the outer cover.

The beneficial effect of this scheme does: through the portable connecting rod of impeller, make gear and rack meshing to make gear revolve, drive the brush roller and rotate, will block into clastic brush hair and rotate to the holding tank in, need not the artifical brush roller that is located the holding tank that rotates, it is more convenient to operate.

Further, the lateral wall of the outer cover is provided with a negative pressure channel which communicates the accommodating groove with the negative pressure cavity.

The beneficial effect of this scheme does: when negative pressure is formed in the negative pressure cavity, negative pressure is formed in the containing groove, external air enters the containing groove from the opening forming the containing groove and enters air flow of the negative pressure cavity from the negative pressure channel, the air flow can wrap and hold the fragments clamped in the bristles, the fragments are separated from the bristles, the frequency of manual cleaning of the bristles is reduced, and the workload of workers is reduced.

Furthermore, a piston is arranged in the accommodating groove in a sliding sealing mode and is positioned above the connecting rod and fixed with the connecting rod.

The beneficial effect of this scheme does: the piston can make the piece that adheres to in the holding tank lateral wall drop along the holding tank when sliding from top to bottom, avoids the piece to remain in the holding tank lateral wall in a large number, falls on the brush hair again and pollutes the brush hair after clearing up the brush hair.

Further, the negative pressure channel is located above the piston with the holding tank intercommunication's one end.

The beneficial effect of this scheme does: when the piston slides down to the below of the one end of negative pressure passageway and holding tank intercommunication, the space of piston below can not form the negative pressure, and the opening part of holding tank can not form the air current that flows in to the holding tank from the external world this moment, avoids the air current to drive a large amount of pieces to being close to brush hair one side, makes the piece unable quilt inhale the negative pressure intracavity and discharge. And when the piston upwards slided to the top of the one end that negative pressure passageway and holding tank communicate, the space and the negative pressure chamber intercommunication of piston below, and the air current through the brush hair is formed to external gas, makes the piece that blocks in the brush hair fall out, reduces artifical clearance.

Further, a sealing plate is hinged to the inner wall of the negative pressure cavity, the sealing plate is located above the milling cutter, and a hinge point of the sealing plate and the negative pressure cavity is located below one end, communicated with the negative pressure cavity, of the negative pressure channel; one end of the sealing plate, far away from the side wall of the negative pressure cavity, is slidably connected with a push rod, the inner wall of the negative pressure cavity is provided with a push groove, and one end of the push rod, far away from the sealing plate, is positioned in the push groove and is slidably connected with the push groove; the dustcoat lateral wall is equipped with the promotion passageway that will promote groove and holding tank intercommunication, and the one end that promotes passageway and holding tank intercommunication is located the top of the one end of negative pressure passageway and holding tank intercommunication.

The beneficial effect of this scheme does: when the piston slides to the upper part of the negative pressure channel and then continues to slide upwards, the space above the piston is reduced, and the gas above the piston enters the pushing groove to enable the push rod to slide out, so that the sealing plate is pushed to rotate. The sealing plate can play the sealing effect to the negative pressure chamber after rotating to horizontal position to make external gas no longer get into the negative pressure intracavity from the opening in negative pressure chamber, increase the gas volume of getting into from the opening of holding the groove, and the unit interval flows through the brush hair gas more, the gas velocity of flow is big more, then the cleaning performance to the brush hair is better, this scheme effectively improves the cleaning performance to the brush hair.

Furthermore, the lateral wall of closing plate orientation push rod is equipped with the dovetail, and sliding connection has the dovetail piece in the dovetail, and the push rod is close to closing plate one end and is articulated with the dovetail piece.

The beneficial effect of this scheme does: when the push rod pushes the sealing plate to slide, the dovetail block slides along the dovetail groove, so that the sealing plate cannot be separated from the push rod, and the sealing plate is prevented from colliding with the side wall of the negative pressure cavity.

Furthermore, a limiting block is fixed on the side wall of the negative pressure cavity, and the hinge point of the sealing plate and the side wall of the negative pressure cavity is equal to or higher than the top of the limiting block.

The beneficial effect of this scheme does: the limiting block plays a limiting role in the sealing plate, and the phenomenon that the sealing plate is inclined and cannot seal the negative pressure cavity due to the fact that the push rod extends out of the overlong distance is avoided.

Furthermore, a stop lever parallel to the brush roller is arranged on one side of the brush roller and fixed with the side wall of the accommodating groove.

The beneficial effect of this scheme does: when the brush roller rotates, the blocking rod blocks the bristles, so that the bristles are bent and deformed firstly and then cross the blocking rod to restore the original shape, when the bristles restore the original shape, the fragments clamped into the bristles are easier to fall out, and the cleaning effect on the bristles is further improved.

Drawings

Fig. 1 is a front longitudinal sectional view of embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is a front longitudinal sectional view of embodiment 2 of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a mounting seat 1, a guide rod 11, a nut seat 12, a screw rod 13, a negative pressure pipe 14, a pushing piece 15, a pushing groove 16, a pushing channel 17, an outer cover 2, a negative pressure cavity 21, a rotating shaft 22, a milling cutter 23, a driving cavity 24, a driving piece 25, a baffle 26, a containing groove 3, a piston 31, a negative pressure channel 32, a connecting rod 33, a rack 34, a baffle rod 35, a gear 36, a connecting ring 37, a first brush roller 41, a second brush roller 42, a third brush roller 43, a fourth brush roller 44, bristles 45, a sealing plate 5, a dovetail block 51, a push rod 52 and a limiting block 53.

Example 1

A milling machine for processing the surface of an elevator door panel is shown in figure 1 and comprises a machine frame, a mounting seat 1, a rotating shaft 22, a milling cutter 23, a driving piece 25 and an outer cover 2, wherein two guide rods 11 are transversely arranged on the machine frame, the two guide rods 11 penetrate through the mounting seat 1 and are in clearance fit with the mounting seat 1, and two ends of each guide rod 11 are welded on the machine frame. The mounting base 1 is provided with a ball screw structure, the ball screw structure comprises a screw 13 and a nut base 12, and the nut base 12 is mounted on the mounting base 1 through a bolt; the horizontal mount pad 1 that runs through of lead screw 13, the frame is run through at the both ends of lead screw 13, all is equipped with the bearing between lead screw 13 both ends and the frame, the inner circle and the outer lane of bearing respectively with lead screw 13 and frame interference fit, be fixed with step motor through the bolt in the frame, step motor passes through shaft coupling and 13 end connection of lead screw.

The cross section of dustcoat 2 in this embodiment along the horizontal direction is the rectangle, and welding in dustcoat 2 top is equipped with negative pressure chamber 21 that the opening is down in the dustcoat 2 in the bottom of mount pad 1 horizontal segment, and the rubberizing of dustcoat 2 has connect negative pressure pipe 14, and negative pressure pipe 14 lower extreme runs through dustcoat 2 and communicates with negative pressure chamber 21 top. As shown in fig. 2, the rotating shaft 22 is located in the housing 2, and the rotating shaft 22 extends along the length direction of the housing 2, as shown in fig. 1, the milling cutter 23 in this embodiment is a cylindrical milling cutter, the milling cutter 23 is fixed on the rotating shaft 22 through a flat key, the lower end of the milling cutter 23 is lower than the lower end of the housing 2, a workbench is arranged below the milling cutter 23, and the workbench is horizontally welded on the frame. As shown in fig. 2, baffles 26 are welded to the upper and lower ends of the negative pressure chamber 21, two driving chambers 24 are formed by the baffles 26 and the inner wall of the outer cover 2, two ends of the rotating shaft 22 penetrate the baffles 26, and bearings are disposed between two ends of the rotating shaft 22 and the baffles 26, which are similar to the mounting method of the bearings between the lead screw 13 and the rack and are not described again here. The driving member 25 is located in the driving cavity 24 at the upper side and is fixed on the inner wall of the housing 2 through bolts, the driving member 25 in this embodiment is a motor, and the driving member 25 is connected with the rotating shaft 22 through a coupling, thereby driving the milling cutter 23 to rotate.

As shown in fig. 1, the side wall of the housing 2 is provided with an annular accommodating groove 3, the opening of the accommodating groove 3 faces downward, as shown in fig. 2, four brush rollers are arranged in the accommodating groove 3 and respectively include a first brush roller 41 on the left side, a second brush roller 42 on the upper side, a third brush roller 43 on the lower side and a fourth brush roller 44 on the right side, the diameters of the first brush roller 41, the second brush roller 42, the third brush roller 43 and the fourth brush roller 44 are smaller than the width of the accommodating groove 3, the outer walls of the first brush roller 41, the second brush roller 42, the third brush roller 43 and the fourth brush roller 44 are respectively glued with bristles 45, as shown in fig. 1, the lower ends of the bristles 45 are lower than the lower end of the milling cutter 23, and therefore, when the milling cutter 23 processes a door panel, the lower ends of the bristles. Wherein first brush roller 41 and fourth brush roller 44 are equal in height, and second brush roller 42 and third brush roller 43 are both higher than first brush roller 41 and fourth brush roller 44, so that no interference of work occurs between first brush roller 41, second brush roller 42, third brush roller 43 and fourth brush roller 44. The two ends of each of the first brush roller 41, the second brush roller 42, the third brush roller 43 and the fourth brush roller 44 are provided with a connecting ring 37, the two ends of each of the first brush roller 41, the second brush roller 42, the third brush roller 43 and the fourth brush roller 44 are welded with connecting blocks, the diameters of the connecting blocks are larger than those of the first brush roller 41, the second brush roller 42, the third brush roller 43 and the fourth brush roller 44, the connecting blocks at the two ends are located on the two sides of the connecting ring 37 respectively, and the first brush roller 41, the second brush roller 42, the third brush roller 43 and the fourth brush roller 44 are prevented from sliding relative to the connecting ring 37.

An annular piston 31 is hermetically and internally arranged in the accommodating groove 3 in a sliding way, connecting rods 33 are respectively arranged above the connecting rings 37, the connecting rods 33 are vertically arranged, the lower ends of the connecting rods 33 are welded on the connecting rings 37, and the upper ends of the connecting rods 33 are welded at the bottom of the piston 31. The top of the outer cover 2 is fixed with a pushing piece 15 through a bolt, the pushing piece 15 in the embodiment adopts a hydraulic jack, and a push rod of the pushing piece 15 penetrates through the top of the outer cover 2 downwards and is welded on the piston 31. The inner wall of the outer cover 2 is provided with a plurality of negative pressure channels 32 which are used for communicating the piston 31 with the negative pressure cavity 21, the negative pressure channels 32 are positioned above the piston 31, and the plurality of negative pressure channels 32 are uniformly distributed along the circumferential direction of the outer cover 2.

As shown in fig. 2, gears 36 are fixed to one ends of the first brush roller 41, the second brush roller 42, the third brush roller 43 and the fourth brush roller 44 through flat keys, the positions of the outer cover 2 opposite to the gears 36 are protruded outwards, so that the gears 36 are prevented from interfering with the adjacent brush rollers, grooves are vertically formed in the side walls of the accommodating grooves 3, the grooves are opposite to the gears 36, racks 34 are welded in the grooves, and the racks 34 are opposite to the gears 36 and meshed with the gears 36. All be equipped with blend stop 35 in the side direction of first brush roller 41, second brush roller 42, third brush roller 43 and fourth brush roller 44, four blend stop 35 are parallel to first brush roller 41, second brush roller 42, third brush roller 43 and fourth brush roller 44 respectively, and four blend stop 35 all are located gear 36 top and blend stop 35 welds on holding tank 3 lateral wall.

The specific implementation process of this embodiment is as follows:

as shown in fig. 1, initially, the lower end of the piston 31 is located below the negative pressure channel 32, the mounting seat 1 is located at the right end of the lead screw 13, and during milling, the door panel is manually placed on the workbench and located on the left side of the milling cutter 23. Then the negative pressure tube 14 is communicated with an external device capable of generating negative pressure manually, the negative pressure tube 14 in the embodiment is communicated with an inlet end of an external bag-type dust collector, negative pressure is formed in the negative pressure cavity 21, and external gas forms airflow which flows into the negative pressure cavity 21 from an opening of the negative pressure cavity 21 and then is exhausted from the negative pressure tube 14 under the negative pressure effect of the negative pressure cavity 21.

Then, the driving part 25 and the stepping motor are started, the driving part 25 drives the rotating shaft 22 to rotate, and the milling cutter 23 is driven to rotate; the stepping motor drives the screw rod 13 to rotate and enables the mounting base 1 to move leftwards, and when the milling cutter 23 moves to the position above the door panel, milling processing is carried out on the door panel. Because the outer cover 2 is fixed on the mounting seat 1, the outer cover 2 and the milling cutter 23 synchronously move leftwards, when the milling cutter 23 moves above the door panel and mills the door panel, the outer cover 2 also moves above the door panel, and the chips generated by milling are blocked by the outer cover 2 and the bristles 45 and cannot fall to the outer side of the outer cover 2. The formed air flow entrains the debris in the outer cover 2, so that the debris is discharged from the negative pressure pipe 14, and the debris is prevented from remaining on the door panel. After milling of one door plate is completed, the door plate is manually taken down from the workbench and the stepping motor is controlled to rotate reversely, so that the mounting base 1 can move to the right end of the screw rod 13 again, and the next door plate can be milled.

When the door plate is used and processed for a long time, the door plate is not placed on the workbench. The pushing piece 15 is started manually, the pushing rod of the pushing piece 15 retracts, the piston 31 is pulled upwards until the piston 31 moves to the position above the negative pressure channel 32, the space at the lower end of the accommodating groove 3 is communicated with the negative pressure cavity 21 at the moment, negative pressure is formed in the accommodating groove 3, airflow which flows into the accommodating groove 3 from the opening of the accommodating groove 3 and then enters the negative pressure cavity 21 through the negative pressure channel 32 is formed, when the airflow passes through the bristles 45, debris clamped in the bristles 45 is made to fall out, the debris is wrapped and clamped, the debris enters the negative pressure cavity 21, and then the debris is discharged from the negative pressure pipe 14, so that the bristles 45 are cleaned. When the piston 31 slides upwards, the piston 31 pulls the connecting rod 33 upwards to enable the first brush roller 41, the second brush roller 42, the third brush roller 43 and the fourth brush roller 44 to move upwards, the gear 36 is meshed with the rack 34, the gear 36 rotates to drive the first brush roller 41, the second brush roller 42, the third brush roller 43 and the fourth brush roller 44 to rotate, the bristles 45 sequentially pass through the stop lever 35, the stop lever 35 enables the bristles 45 to bend and deform, the bristles 45 rapidly recover to the original shape after passing through the stop lever 35 to enable the chippings clamped in the bristles 45 to fall out, and after the piston 31 slides to the upper side of the negative pressure channel 32, the push rod 15 can still be manually controlled to continuously extend and retract, the piston 31 continuously moves up and down to drive the first brush roller 41, the second brush roller 42, the third brush roller 43 and the fourth brush roller 44 to continuously move up and down relative to the stop lever 35, so as to continuously deform the bristles 45, further promoting the falling of the debris in the brush 45 and improving the cleaning effect of the brush 45.

After the chips in the bristles 45 fall out, the push rod of the pushing piece 15 is manually controlled to stretch out, so that the piston 31 moves downwards to the position below the negative pressure channel 32, at the moment, the lower end of the accommodating groove 3 does not form airflow entering the accommodating groove 3 from the outside, the pushing piece 15 is closed, and the door plate can be milled again.

Example 2

On the basis of embodiment 1, as shown in fig. 3, a sealing plate 5 is arranged in the negative pressure cavity 21 in this embodiment, the sealing plate 5 is located above the milling cutter 23, the right end of the sealing plate 5 is hinged to the right end of the negative pressure cavity 21, the right end of the sealing plate 5 is lower than the negative pressure channel 32, a torsion spring is arranged between the right end of the sealing plate 5 and the side wall of the negative pressure cavity 21, two straight torsion arms of the torsion spring are respectively welded on the sealing plate 5 and the side wall of the negative pressure cavity 21, the torsion spring enables the sealing plate 5 to keep a state that the left end is higher than the right end. The left wall of the negative pressure cavity 21 is welded with a limiting block 53, and the top of the limiting block 53 is equal to the right end of the sealing plate 5 in height.

The top of dustcoat 2 is equipped with promotion groove 16, promotes the groove 16 lower extreme and inclines to the left, and the top of dustcoat 2 is equipped with the promotion passageway 17 with holding tank 3 top and promotion groove 16 top intercommunication, and the closing plate 5 top is equipped with push rod 52, and push rod 52 upper end is located promotion passageway 17 and with promotion passageway 17 sliding seal. The upper surface of the sealing plate 5 is provided with a dovetail groove, a dovetail block 51 is arranged in the dovetail groove, and the lower end of the push rod 52 is hinged with the dovetail block 51.

After the top of the piston 31 in this embodiment moves to the position above the negative pressure channel 32, the pushing member 15 continues to pull the piston 31 upward, so that the piston 31 continues to move upward, the space above the piston 31 decreases, the gas in the space enters the pushing groove 16 from the pushing channel 17, the push rod 52 slides outward of the pushing groove 16, the left end of the sealing plate 5 is pushed to rotate counterclockwise, and the left end of the sealing plate 5 abuts against the limiting block 53. At this time, the negative pressure cavity 21 is sealed by the sealing plate 5, and outside gas does not enter the negative pressure cavity 21 from the opening of the negative pressure cavity 21 in a large amount any more, so that the pushing member 15 is manually closed. At this time, the amount of gas entering the housing groove 3 from the opening of the housing groove 3 increases, the amount of gas passing through the brush staples 45 per unit time increases, and the cleaning effect of the brush staples 45 is improved.

After the bristles 45 are cleaned, the pushing member 15 is manually started, the push rod 52 of the pushing member 15 is controlled to extend out, the piston 31 is pushed downwards, the space above the piston 31 is enlarged, the gas in the pushing groove 16 enters the space above the piston 31 from the pushing channel 17, the push rod 52 slides towards the pushing groove 16, the sealing plate 5 is not pushed any more, the sealing plate 5 rotates clockwise under the action of the torsion spring, and the negative pressure cavity 21 is not sealed any more. Other operations in this embodiment are the same as those in embodiment 1.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the present invention and the practicability of the patent. The technology, shape and construction parts which are not described in the present invention are all known technology.

Claims (10)

1. Elevator door panel surface processing milling machine, including pivot, milling cutter and driving piece, the pivot transversely sets up and driving piece drive pivot rotates, milling cutter fixes in the pivot, its characterized in that: the pivot periphery is equipped with the dustcoat, be equipped with opening negative pressure chamber down in the dustcoat, milling cutter is located the negative pressure intracavity and the milling cutter lower extreme is less than the dustcoat lower extreme, dustcoat upper portion is fixed with the negative pressure pipe with negative pressure chamber intercommunication.

2. The milling machine for processing the surface of elevator door panels according to claim 1, wherein: the brush is characterized in that an annular accommodating groove is formed in the side wall of the outer cover, an opening of the accommodating groove faces downwards, a plurality of brush rollers are horizontally arranged in the accommodating groove, the number of the brush rollers is the same as that of the side wall of the outer cover, the brush rollers are in one-to-one correspondence with the side wall of the outer cover, the brush rollers are rotatably connected with the accommodating groove and can vertically slide, bristles are fixed on the brush rollers, a connecting rod is arranged above the brush rollers and is rotatably connected with the brush rollers, gears are fixed on the brush rollers, and racks meshed with the gears are vertically fixed on the side wall of the accommodating.

3. The milling machine for processing the surface of elevator door panels according to claim 2, wherein: and a pushing piece for pushing the connecting rod to move vertically is fixed on the outer cover.

4. The milling machine for processing the surface of elevator door panels according to claim 3, wherein: the lateral wall of the outer cover is provided with a negative pressure channel which communicates the accommodating groove with the negative pressure cavity.

5. The milling machine for processing the surface of elevator door panels according to claim 4, wherein: the piston is arranged above the connecting rod and fixed with the connecting rod.

6. The milling machine for processing the surface of elevator door panels according to claim 5, wherein: one end of the negative pressure channel communicated with the accommodating groove is positioned above the piston.

7. The milling machine for processing the surface of elevator door panels according to claim 6, wherein: a sealing plate is hinged to the inner wall of the negative pressure cavity, the sealing plate is positioned above the milling cutter, and a hinge point of the sealing plate and the negative pressure cavity is positioned below one end of the negative pressure channel communicated with the negative pressure cavity; one end, far away from the sealing plate, of the sealing plate is connected with a push rod in a sliding mode, the inner wall of the negative pressure cavity is provided with a push groove, and one end, far away from the sealing plate, of the push rod is located in the push groove and is connected with the push groove in a sliding mode; the dustcoat lateral wall is equipped with the promotion passageway that will promote groove and holding tank intercommunication, the one end that promotes passageway and holding tank intercommunication is located the top of the one end of negative pressure passageway and holding tank intercommunication.

8. The milling machine for processing the surface of elevator door panels according to claim 7, wherein: the lateral wall of closing plate orientation push rod is equipped with the dovetail, sliding connection has the dovetail block in the dovetail, the push rod is close to closing plate one end and is articulated with the dovetail block.

9. The milling machine for processing the surface of elevator door panels according to claim 8, wherein: the side wall of the negative pressure cavity is fixed with a limiting block, and the hinged point of the sealing plate and the side wall of the negative pressure cavity is equal to or higher than the top of the limiting block.

10. The milling machine for processing the surface of elevator door panels according to claim 4, wherein: a stop lever parallel to the brush roller is arranged on one side of the brush roller and fixed with the side wall of the accommodating groove.

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