CN115365962A

CN115365962A - Grinding plate device for processing circuit board

Info

Publication number: CN115365962A
Application number: CN202211326715.7A
Authority: CN
Inventors: 杨和斌; 金功成; 李强; 华允均
Original assignee: Jiangyou Xinglian Electronic Technology Co ltd
Current assignee: Jiangyou Xinglian Electronic Technology Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2022-11-22
Anticipated expiration: 2042-10-27
Also published as: CN115365962B

Abstract

The invention discloses a grinding plate device for processing a circuit board, which belongs to the technical field of circuit board processing and comprises a bottom plate, wherein first electric telescopic rods are transversely and uniformly arranged on the bottom plate, ejector rods of the first electric telescopic rods are connected with a top plate, a supporting frame is arranged on the top plate, a first motor is arranged on the supporting frame, a rotor shaft of the first motor penetrates through the supporting frame and is connected with an installation template which can be slidably installed in a printed circuit board, a fixing frame is connected to the side of the bottom plate, the top of the fixing frame is connected with a table frame, the top of the table frame is provided with a top plate, two sides of the table frame are provided with holes, grinding belts are inserted into the holes, and a belt collecting mechanism for collecting the grinding belts is arranged on one side of the bottom plate. Through take-up mechanism, first limit tape mechanism and second limit tape mechanism cooperation peripheral hardware computer control, realize the automatic change of area of polishing and to the base plate polished surface to because the area length of polishing is longer, the single pair of area of polishing is satisfied and is used for a long time, and the single in addition can effectively polish to a plurality of base plates, and it is more convenient to use.

Description

Grinding plate device for processing circuit board

Technical Field

The invention belongs to the technical field of circuit board processing, and particularly relates to a board grinding device for circuit board processing.

Background

Before printed circuit board printing production, need adopt earlier to grind the board device to the base plate, the realization is polished the coarse part in base plate surface, do benefit to printing production, current board device main part that grinds is a pedestal, be provided with the installation template on the pedestal, be equipped with the die cavity of slidable insertion base plate in the installation template, when the base plate inserts the die cavity in, restriction horizontal migration basically, the avris of pedestal is provided with elevating system, the last rotary driving mechanism that is provided with of elevating system, and it is rotatory to drive the friction disc through rotary driving mechanism, when using, control elevating system moves down, rotary driving mechanism moves down thereupon, thereby drive rotatory friction disc and move down, the upper surface until the friction disc contact base plate, in the friction disc rotation process, can polish the upper surface high-speed of base plate, can polish the coarse part in base plate surface, the weak point that exists is: the plate grinding device is suitable for grinding the base plate of a single printed circuit board, but is not suitable for grinding a plurality of base plates at a time, and the friction plate is consumed quickly in the grinding process, so that the friction plate is required to be frequently disassembled and assembled for replacing the friction plate, and the use is inconvenient.

Disclosure of Invention

The invention aims to provide a board grinding device for processing a circuit board, which is used for solving the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a circuit board processing is with grinding plate device, includes the bottom plate, transversely evenly be provided with an electric telescopic handle on the bottom plate, an electric telescopic handle's ejector pin is connected with the roof, be provided with the support frame on the roof, be provided with first motor on the support frame, the rotor shaft of first motor runs through the support frame and is connected with the installation template of slidable packing into printed circuit board, the avris of bottom plate is connected with the top of fixed frame and is connected with the platform frame, the top of platform frame is provided with the roof, the both sides of platform frame are equipped with foraminiferous and foraminiferous interior interlude and have the area of polishing, one side of bottom plate is provided with the receipts tape unit who packs up the area of polishing, the avris of bottom plate is provided with the first tape unit that can prevent to emit the area of polishing, and is provided with the second tape unit that can stop to receive the area on the roof.

Preferably, the bottom plate is connected with slide bars at positions on two sides of the first electric telescopic rod, and the top plate is connected with slide sleeves at two sides of the bottom of the top plate.

Preferably, first support frames are symmetrically arranged on one side of the top plate, a first carrying belt wheel is rotatably arranged between the first support frames, and the polishing belt is arranged on the first carrying belt wheel.

Preferably, the second belt limiting mechanism comprises a vertical frame connected to the top plate, a second electric telescopic rod is arranged on the vertical frame, an ejector rod of the second electric telescopic rod is connected with a first pressing plate, a plate hole is formed in one side of the top plate, and the first pressing plate is inserted into the plate hole

Preferably, one side of the fixed frame is provided with an elevating rod, the top of the elevating rod is provided with a second support frame, a second bearing belt wheel is arranged in the second support frame in a rotating manner, and the grinding belt is positioned on the second bearing belt wheel

Preferably, the belt winding mechanism comprises a vertical plate arranged on the bottom plate, a second motor is arranged on the vertical plate, a rotor shaft of the second motor penetrates out of the vertical plate and is connected with an inserting column, a winding wheel is sleeved on the inserting column, a pressing ring and a screw are sleeved at one end of the inserting column, penetrating out of the winding wheel, of the inserting column, a loading groove is formed in the winding wheel, a threaded taper rod is arranged in the loading groove, and one end, penetrating through the grinding belt, of the threaded taper rod is sleeved with a pressing plate and locked through a nut.

Preferably, first limit tape unit constructs including the pole setting of connection on the bottom plate, the top of pole setting is provided with a frame, the area of polishing runs through a frame, the top of a frame is provided with the mounting panel, the bottom of mounting panel is provided with third electric telescopic handle, third electric telescopic handle's ejector pin is connected with the second clamp plate and compresses tightly on the area of polishing.

Preferably, the top plate is connected with a rack rod, the top of the rack rod is connected with a head plate, one side of the bottom of the head plate is provided with a brush strip, the other side of the bottom of the head plate is provided with a fixed plate, and the bottom of the fixed plate is provided with a scraper.

Preferably, the rear side position of fixed frame is provided with the dust catcher, evenly be provided with the takeover behind the fixed frame, the takeover is connected at the bleed end of dust catcher through first hose, the exhaust end of dust catcher is connected with the second hose.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the belt winding mechanism, the first belt limiting mechanism and the second belt limiting mechanism are matched with an external computer for control, so that the automatic replacement of the polishing belt for polishing the substrate surface is realized, and because the polishing belt is longer, a single pair of polishing belts can be used for a longer time, and a plurality of substrates can be effectively polished at a single time, so that the use is more convenient.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view in partial cutaway of FIG. 1;

FIG. 3 is a left side schematic view of FIG. 1;

FIG. 4 is an enlarged view of a portion a of FIG. 1;

fig. 5 is an enlarged schematic view of b of fig. 2.

In the figure: the device comprises a base plate 1, a first electric telescopic rod 2, a top plate 3, a sliding rod 4, a sliding sleeve 5, a supporting frame 6, a first motor 7, an installation template 8, a fixed frame 9, a frame 10, a top plate 11, a polishing belt 12, a first supporting frame 13, a first receiving belt wheel 14, a vertical frame 15, a second electric telescopic rod 16, a first pressing plate 17, an elevated rod 18, a second supporting frame 19, a second receiving belt wheel 20, a vertical plate 21, a second motor 22, a belt collecting wheel 23, a column 24, a pressing ring 25, a screw 26, a pressing plate 27, a nut 28, a vertical rod 29, a frame 30, a mounting plate 31, a third electric telescopic rod 32, a second pressing plate 33, a hack lever 34, a head plate 35, a brush strip 36, a fixed plate 37, a scraper 38, a dust collector 39, a connecting pipe 40, a first hose 41 and a second hose 42.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1 and 2, a grinding plate device for processing a circuit board includes a bottom plate 1, five first electric telescopic rods 2 are laterally and uniformly bolted on the bottom plate 1, a top plate 3 is bolted on top rods of the first electric telescopic rods 2, sliding rods 4 are welded on the bottom plate 1 and located at two sides of the first electric telescopic rods 2, sliding sleeves 5 are welded on two sides of the bottom of the top plate 3, the sliding sleeves 5 are slidably sleeved on the sliding rods 4, the top plate 3 is more stably moved up and down by sliding fit of the sliding sleeves 5 and the sliding rods 4 at two sides, a support frame 6 is bolted on the top plate 3, a first motor 7 is bolted on the support frame 6, the first motor 7 is a 57-type stepping motor, a power controlled end of the first motor 7 is connected with a power output control end of the 57-type driver by a cable, a main power input end of the 57-type driver is connected with an external power supply by a cable, an information end of the 57-type driver is connected with an external computer by an information line, a rotor shaft of the first motor penetrates through a shaft hole arranged at the top of the support frame 6 and is connected with a mounting template 8 capable of slidably mounting a printed circuit board, in accordance with different specifications of printed circuit boards, in accordance with different specifications of the mounting templates 8 for use of printed circuit board.

Referring to fig. 1, 2 and 3, a fixing frame 9 is welded to the side of a bottom plate 1, a table frame 10 is welded to the top of the fixing frame 9, a top plate 11 is screwed to the top of the table frame 10, belt holes into which polishing belts 12 are slidably inserted are formed in the left and right sides of the table frame 10, the polishing belts 12 are slidably inserted into the belt holes, a single pair of polishing belts 12, each having a length of 1000 m, is wound around a belt drum, the belt drum supports both sides of the belt drum by using a fixed receiving frame, so that the belt drum can rotate on the fixed receiving frame in cooperation with the release of the polishing belts 12, the polishing belts 12 are borax-polished, the polishing belts 12 of different polishing grades can be selected as required, a belt retracting mechanism for retracting the polishing belts 12 is provided on one side of the bottom plate 1, a first belt restricting mechanism for preventing the discharge of the polishing belts 12 is provided on the side of the bottom plate 1, a second belt restricting mechanism for preventing the retraction of the belt is provided on the top plate 3, first support frames 13 are fixed on the left side of the top plate 11 through front and back symmetrical bolts, a first bearing belt wheel 14 is rotatably arranged between the first support frames 13, rotary columns are inserted into column holes formed in the first support frames 13 in an interference manner, first bearing holes formed in the center positions of the front end and the back end of the first bearing belt wheel 14 are inserted into first bearings in an interference manner, inner rings of the first bearings are inserted into the rotary columns in an interference manner, so that the first bearing belt wheel 14 can rotate in the first support frames 13 in a smooth manner, the polishing belt 12 is tightly pressed in a wheel groove in the first bearing belt wheel 14, the left bearing support of the polishing belt 12 during movement is realized through the arrangement of the first bearing belt wheel 14, the second belt limiting mechanism comprises a vertical frame 15 fixed on the right side of the top plate 11 through bolts, a second electric telescopic rod 16 is fixed on the vertical frame 15 through bolts, a top rod flange of the second electric telescopic rod 16 is connected with a first pressure plate 17, plate holes are formed in the right side of the top plate 11, first clamp plate 17 slides and inserts the diaphragm orifice, the position welding that just is located the below of polishing area 12 in the frame 10 is the clamp plate, and it corresponds the diaphragm orifice to be the clamp plate, when the ejector pin of second electric telescopic handle 16 stretches out, drive first clamp plate 17 and compress tightly polishing area 12 on being the clamp plate, the polishing area 12 position on right side on frame 10 has been stabilized, the right side of fixed frame 9 is provided with elevating rod 18, and the bottom welding of elevating rod 18 is on bottom plate 1, the top welding of elevating rod 18 has second support frame 19, second support frame 19 internal rotation is provided with second and accepts band pulley 20, the pole downthehole interference that is equipped with on second support frame 19 alternates and has revolved the post, the second bearing downthehole interference that both ends central point was equipped with around second and accepts band pulley 20 inserts the second bearing, the inner circle of second bearing inserts the interference pole, consequently, it accepts the band pulley 20 and can slide the rotation in second support frame 19 to realize when polishing area 12 removes, polishing area compresses tightly accepts the band pulley groove in the second, through the setting of second band pulley 20.

Referring to fig. 1, 2, 3 and 4, the belt retracting mechanism includes a vertical plate 21 fixed on the right side of the bottom plate 1 by a bolt, a second motor 22 is fixed on the back of the vertical plate 21 by a bolt, the second motor 22 is an 86-type stepping motor, a power controlled end of the second motor 22 is connected with a power output control end of an 86-type driver by a cable, a main power input end of the 86-type driver is connected with an external power source by a cable, an information access end of the 86-type driver is connected with an external computer by an information line, a rotor shaft of the second motor 22 penetrates through a through hole formed in the vertical plate 21 and is connected with an insert column 24 by a flange, a belt retracting wheel 23 is slidably sleeved on the insert column 24, the insert column 24 is a columnar structure with a square cross section, the belt receiving wheel 23 cannot rotate on the plug-in post 24, the plug-in post 24 penetrates out of the front end of the belt receiving wheel 23 and is sleeved with a pressing ring 25, a screw 26 is connected with the front end of the plug-in post 24 in a threaded mode, the head of the screw 26 presses the pressing ring 25 in front of the plug-in post 24 and the belt receiving wheel 23, the back of the belt receiving wheel 23 is pressed at the flange connection position of the second motor 22 and the plug-in post 24, a loading groove is formed in the belt receiving wheel 23, a threaded taper rod is welded in the loading groove, a pressing plate 27 is sleeved at one end, penetrating through the grinding belt 12, of the threaded taper rod and locked through a nut 28, the threaded taper rod is locked through the nut 28, the grinding belt 12 is stably connected with the belt receiving wheel 23, and when a rotor shaft of the motor rotates reversely, the belt receiving wheel 23 is driven to continuously retract the grinding belt 12.

Referring to fig. 1, 2, 3 and 5, the first belt limiting mechanism includes an upright rod 29 welded on the bottom plate 1, a frame 30 is welded on the top of the upright rod 29, the polishing belt 12 penetrates through the frame 30, a mounting plate 31 is screwed on the top of the frame 30, a third electric telescopic rod 32 is bolted on the bottom of the mounting plate 31, a second pressing plate 33 is bolted on an ejector rod of the third electric telescopic rod 32 and is pressed on the polishing belt 12, the lower surface of the pressed polishing belt 12 is pressed on the lower end of the inside of the frame 30, the position of the left polishing belt 12 on the table frame 10 is stabilized, a hack lever 34 is welded on the front and rear positions of the middle side of the top plate 11, a head plate 35 is welded on the top of the hack lever 34, a brush bar 36 is bolted on the right side of the bottom of the head plate 35, a polyethylene brush bar 36 is fixed on the right side of the bottom of the head plate 35, the front and rear length of the brush bar 36 is the same as the front and rear width of the polishing belt 12, when the polishing belt 12 moves, particle impurities in the outer surface of the polishing belt 12 can be brushed out, a fixing plate 37 is fixed on the left side of the bottom of the head plate 35 through a bolt, a scraper 38 is integrally arranged at the bottom of the fixing plate 37, when the polishing belt 12 moves, the impurities attached to the polishing belt 12 can be scraped off, the front and back length of the scraper 38 is the same as the front and back width of the polishing belt 12, a dust collector 39 is arranged at the rear side of the fixing frame 9, a connecting pipe 40 is transversely and uniformly arranged behind the fixing frame 9, the connecting pipe 40 is communicated with the fixing frame 9, the front end of the connecting pipe 40 corresponds to the mounting template 8 in a standby state, the connecting pipe 40 is connected to the air suction end of the dust collector 39 through a first hose 41, a second hose 42 is connected to the air exhaust end of the dust collector 39, the dust collector 39 runs, and the particle impurities ground on the mounting template 8 and the polishing belt 12 are sucked away through the connecting pipe 40 and then discharged through the second hose 42.

The power controlled ends of the first electric telescopic rod 2, the second electric telescopic rod 16 and the third electric telescopic rod 32 are connected with the power controlled end of an external driver through cables, the main power input end of the external driver is connected with an external power through cables, the information access end of the external driver is connected with an external computer through an information line, the external computer is adopted to edit programs of a 57 model, a 86 model and a driver connected with each electric telescopic rod, when the ejector rod of the second electric telescopic rod 16 is operated by the external computer to retract, the ejector rod of the third electric telescopic rod 32 retracts after 1 second delay, when the ejector rod of the electric telescopic rod 32 retracts, the reverse revolution number of a rotor shaft of the second motor 22 can be keyed in, when the second motor 22 executes the set reverse revolution number, after the belt 12 is ground by the belt take-up wheel 23, the ejector rod of the third electric telescopic rod 32 is started to extend after 1 second delay, when the second pressing plate 33 presses the grinding belt 12 to the inner lower end of the frame 30, the ejector rod of the third electric telescopic rod 32 stops extending, after the second motor 22 executes the reverse revolution and stops, after the second motor 22 executes the reverse revolution number, after 1 second motor 16 is retracted, the second electric telescopic rod and the outer surface of the second electric telescopic rod 16 and the second electric telescopic rod can slide to meet the requirement of the length of the grinding belt 16, and the pressing plate 17; when the ejector rod of the first electric telescopic rod 2 operated by a computer arranged outside extends to the highest position, the requirement that the base plate placed in the mounting template 8 is effectively contacted with the polishing belt 12 is met, and when the ejector rod of the first electric telescopic rod 2 extends to the highest position, the rotor shaft of the first motor 7 is started to run and then stop in a mode of clockwise rotation of 20 turns, anticlockwise rotation of 20 turns, clockwise rotation of 10 turns and anticlockwise rotation of 10 turns, and the ejector rod of the first electric telescopic rod 2 is started to retract.

The working principle of the embodiment is as follows: when in use, the substrate is firstly put into each mounting template 8, the ejector rod of the second electric telescopic rod 16 is operated to retract through an external computer, the third electric telescopic rod 32 retracts along with the ejector rod, therefore, the first pressure plate 17 and the second pressure plate 33 are separated from the grinding belt 12, the reverse rotation number of the rotor shaft of the second motor 22 is set through an external computer, the retraction amount of the grinding belt 12 driven by the second motor 22 to drive the retraction pulley 23 is changed, thereby transversely moving the grinding belt 12 which has been subjected to the grinding operation away from the base plate, after the second motor 22 executes the set reverse revolution to enable the take-up pulley 23 to take up the grinding belt 12, starting the extension of the mandril of the third electric telescopic rod 32 after 1 second delay, when the second pressing plate 33 presses the polishing belt 12 against the lower end of the frame 30, the top rod of the third electric telescopic rod 32 stops extending, the second motor 22 is started to perform reverse rotation for 0.4 second and then stops, the polishing belt 12 is tightened, and after 1 second delay, the mandril of the second electric telescopic rod 16 extends out, at the moment, the first pressure plate 17 and the second pressure plate 33 tightly press the polishing belt 12 at the lower end in the frame 30, the position of the polishing belt 12 in the table frame 10 is stabilized, the ejector rod of the first electric telescopic rod 2 is operated by a computer arranged outside to extend, the base plate placed in the mounting template 8 is effectively contacted with the polishing belt 12, when the top rod of the first electric telescopic rod 2 extends to the highest position, the rotor shaft of the first motor 7 is started to operate according to the modes of forward rotation 20 rotation, reverse rotation 20 rotation, forward rotation 10 rotation and reverse rotation 10 rotation and then is stopped, the top rod of the first electric telescopic rod 2 is started to retract, a plurality of substrates can be effectively polished at one time, because the length of the polishing belt 12 is longer, the single pair of polishing belts 12 can be used for a longer time, and the polishing surface of the substrate is replaced in an automatic moving mode of the polishing belts 12, so that the substrate polishing machine is more convenient;

when a pair of grinding belts 12 is used up, the belt retracting wheel 23 can be detached from the plug-in post 24 through the detaching screw 26, when a new grinding belt 12 is replaced, the new grinding belt 12 can sequentially pass through the belt holes on the two sides of the frame 30 and the table frame 10, finally, the threaded taper rod penetrates through the end part of the grinding belt 12, the pressing plate 27 is sleeved on the threaded taper rod and locked through the nut 28, the belt retracting wheel 23 is sleeved on the plug-in post 24, and the pressing ring 25 is sleeved at one end of the plug-in post 24, which passes through the belt retracting wheel 23, and locked through the screw 26, so that the grinding belt 12 can be replaced conveniently;

before and after polishing, the dust collector 39 is operated to suck away the particle impurities ground on the mounting template 8 and the polishing belt 12 through the connecting pipe 40, and then the particle impurities are discharged out of a factory through the second hose 42;

when the polishing belt 12 moves, the brush bar 36 is arranged to brush out particle impurities on the outer surface of the polishing belt 12, and the scraper 38 is arranged to scrape off impurities attached to the polishing belt 12.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. The utility model provides a circuit board processing is with grinding board device which characterized in that: including bottom plate (1), transversely evenly be provided with first electric telescopic handle (2) on bottom plate (1), the ejector pin of first electric telescopic handle (2) is connected with roof (3), be provided with support frame (6) on roof (3), be provided with first motor (7) on support frame (6), the rotor shaft of first motor runs through support frame (6) and is connected with slidable and packs into printed circuit board's installation template (8), the avris of bottom plate (1) is connected with the top of fixed frame (9) and is connected with platform frame (10), the top of platform frame (10) is provided with roof (11), the both sides of platform frame (10) are equipped with foraminiferous and foraminiferous interlude has been worn to insert and have been polished area (12), one side of bottom plate (1) is provided with the receipts tape unit who packs up polished area (12), the avris of bottom plate (1) is provided with the first limit tape unit that can prevent to emit polished area (12), and is provided with the second limit tape unit that can block receipts and take up on roof (3).

2. The board grinding device for processing the circuit board as claimed in claim 1, wherein: the electric telescopic handle is characterized in that sliding rods (4) are connected to positions, located on two sides of the first electric telescopic handle (2), of the bottom plate (1), sliding sleeves (5) are connected to two sides of the bottom of the top plate (3), and the sliding sleeves (5) are sleeved into the sliding rods (4).

3. The board grinding device for processing the circuit board as claimed in claim 1, wherein: one side of the top plate (11) is symmetrically provided with first support frames (13), a first bearing belt wheel (14) is rotatably arranged between the first support frames (13), and the polishing belt (12) is arranged on the first bearing belt wheel (14).

4. The board grinding device for processing the circuit board as claimed in claim 1, wherein: the second belt limiting mechanism comprises a vertical frame (15) connected to the top plate (11), a second electric telescopic rod (16) is arranged on the vertical frame (15), an ejector rod of the second electric telescopic rod (16) is connected with a first pressing plate (17), a plate hole is formed in one side of the top plate (11), and the first pressing plate (17) is inserted into the plate hole.

5. The board grinding device for processing the circuit board as claimed in claim 1, wherein: one side of the fixed frame (9) is provided with an elevating rod (18), the top of the elevating rod (18) is provided with a second support frame (19), a second bearing belt wheel (20) is rotationally arranged in the second support frame (19), and the grinding belt (12) is positioned on the second bearing belt wheel (20).

6. The board grinding device for processing the circuit board as claimed in claim 1, wherein: receive band mechanism including setting up riser (21) on bottom plate (1), be provided with second motor (22) on riser (21), the rotor shaft of second motor (22) wears out riser (21) and is connected with post (24), it is equipped with take-up pulley (23) to insert the cover on post (24), it has clamping ring (25) and spiro union to insert a pot head that post (24) wore out take-up pulley (23) has screw (26), be equipped with the loading groove in take-up pulley (23), the inslot of packing is provided with the screw taper pole, the pot head that the screw taper pole runs through grinding band (12) is equipped with clamp plate (27) and locks through nut (28).

7. The board grinding device for processing circuit boards as claimed in claim 1, wherein: first limit area mechanism is including connecting pole setting (29) on bottom plate (1), the top of pole setting (29) is provided with a frame (30), frame (30) are run through in area (12) of polishing, the top of frame (30) is provided with mounting panel (31), the bottom of mounting panel (31) is provided with third electric telescopic handle (32), the ejector pin of third electric telescopic handle (32) is connected with second clamp plate (33) and compresses tightly on area (12) of polishing.

8. The board grinding device for processing the circuit board as claimed in claim 1, wherein: the novel multifunctional toothbrush is characterized in that a rack rod (34) is connected onto the top plate (11), a head plate (35) is connected to the top of the rack rod (34), a brush strip (36) is arranged on one side of the bottom of the head plate (35), a fixing plate (37) is arranged on the other side of the bottom of the head plate (35), and a scraper (38) is arranged at the bottom of the fixing plate (37).

9. The board grinding device for processing the circuit board as claimed in claim 1, wherein: the rear side position of fixed frame (9) is provided with dust catcher (39), evenly be provided with takeover (40) behind fixed frame (9), takeover (40) are connected at the bleed end of dust catcher (39) through first hose (41), the exhaust end of dust catcher (39) is connected with second hose (42).