CN113714532A - Automobile axle drill used in automobile field - Google Patents

Automobile axle drill used in automobile field Download PDF

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Publication number
CN113714532A
CN113714532A CN202111059692.3A CN202111059692A CN113714532A CN 113714532 A CN113714532 A CN 113714532A CN 202111059692 A CN202111059692 A CN 202111059692A CN 113714532 A CN113714532 A CN 113714532A
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CN
China
Prior art keywords
plate
drill
guide rod
hole
automotive
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111059692.3A
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Chinese (zh)
Inventor
安妮
刘蕾
曹志坡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dezhou Vocational and Technical College
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Dezhou Vocational and Technical College
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dezhou Vocational and Technical College filed Critical Dezhou Vocational and Technical College
Priority to CN202111059692.3A priority Critical patent/CN113714532A/en
Publication of CN113714532A publication Critical patent/CN113714532A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B41/00Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0042Devices for removing chips
    • B23Q11/0046Devices for removing chips by sucking

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

The invention relates to the technical field related to the field of automobile part processing, in particular to an automobile axle perforator for the field of automobiles, which comprises supporting legs, an operation table top, a supporting rod and a top plate, wherein a telescopic electric cylinder is fixedly arranged on the top plate, a drill body is fixedly arranged on a telescopic rod of the telescopic electric cylinder through a connecting piece, an installation plate is integrally formed on the drill body, an upper dustproof assembly is arranged on the installation plate, a through hole is formed in the operation table top, and a waste material collection channel is arranged at the position, positioned at the through hole, below the operation table top; through setting up the last dustproof subassembly that comprises upper connecting plate, next connecting plate and the combination of air cavity to set up first trachea on upper connecting plate, and guarantee that first trachea is linked together with the air cavity, and be connected first tracheal other end and dust collecting equipment's inlet port, thereby play dustproof effect through dustproof subassembly, and inhale among the dust collecting equipment, thereby guarantee that the staff can be in and carry out work in the healthy environment.

Description

Automobile axle drill used in automobile field
Technical Field
The invention relates to the technical field related to the field of automobile part machining, in particular to an automobile axle borer used in the field of automobiles.
Background
The axle may be unitary, such as a large barbell, with both ends supporting the vehicle body through a suspension system, so that a unitary axle is typically fitted with non-independent suspensions; the axle can also be of a disconnected type, like two umbrellas are inserted at the two sides of the vehicle body, and then the vehicle body is supported by the suspension system respectively, so that the disconnected type axle is matched with the independent suspension. The invention provides an automobile axle borer for solving the problems that a plurality of bolt holes are formed in the surface of an axle so as to be convenient for connecting other parts, scrap iron generated by the conventional axle boring device during the boring of the surface of the axle is visible everywhere, the scrap iron is easy to fly and jump to damage operators to cause safety accidents, the scrap iron falls randomly in a workplace to influence the environmental sanitation of the surrounding working area, the workers need to spend time for cleaning in the later period and are not beneficial to the production of the axle.
Disclosure of Invention
The invention aims to provide an automobile axle drill used in the field of automobiles so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a car axle perforator for automotive filed, includes supporting leg, operation mesa, bracing piece and roof, fixed mounting has flexible electric jar on the roof, there is the body of boring through connecting piece fixed mounting on the telescopic link of flexible electric jar, integrated into one piece has the mounting panel on the body of boring, install upper dustproof subassembly on the mounting panel, the through-hole has been seted up on the operation mesa, and the position department that just operates mesa below position at the through-hole is provided with the garbage collection passageway, and the below of its garbage collection passageway is provided with the collecting box, upper dustproof subassembly comprises upper connecting plate, next connecting plate and air cavity combination, is provided with first trachea on the upper connecting plate of saying, first trachea is linked together with the air cavity, be provided with the drill bit seat on the downside rotor of body of boring, install the drill bit on its drill bit seat.
Preferably, the collecting box is of a rectangular box structure, a cleaning opening is formed in the right side face of the box body, and a box door is arranged at the position of the cleaning opening.
Preferably, the mounting plate is an annular plate, a first guide rod hole and an air pipe hole are formed in the plate body of the mounting plate, the first air pipe penetrates through the air pipe hole, and the other end of the first air pipe is connected with an air inlet port of the dust collection equipment.
Preferably, the air cavity on the upper dustproof assembly is of a corrugated pipe structure, a connecting lug plate is integrally formed at the outward folding position of the pipe body and the edge position of the upper connecting plate, the connecting lug plate is an annular plate, and the plate body of the connecting lug plate is provided with second guide rod holes.
Preferably, the plate body of the lower connecting plate is fixedly provided with a guide rod, the positions of the first guide rod hole and the second guide rod hole correspond to the positions of the guide rod, the rod body of the guide rod penetrates through the first guide rod hole and the second guide rod hole, and the upper end of the guide rod is provided with a limiting plate.
Preferably, the guide rod is provided with a circle in an equal circumference manner, a rod body of the guide rod is sleeved with a return spring, and the return spring is arranged between two adjacent connecting lug plates.
Preferably, when the return spring is in the return state, the air cavity of the return spring is in the stretched state, the drill bit is completely retracted into the inner cavity of the air cavity and arranged, and the drill bit is arranged right above the through hole in the operating table.
Preferably, a secondary channel is arranged on the right side wall of the waste collecting channel, a second air pipe is connected to the tail end of the secondary channel, and the other end of the second air pipe is connected with an air inlet port of the dust collecting device.
Preferably, all fixed welding has the attachment strap about the inner chamber of garbage collection passageway on the lateral wall, the attachment strap is for setting up in groups, and installs the picture peg on the attachment strap, leave the clearance between the rear side end of attachment strap and the rear side wall of garbage collection passageway inner chamber.
Compared with the prior art, the invention has the beneficial effects that:
1. the dust-proof device is characterized in that an upper dust-proof component formed by combining an upper connecting plate, a lower connecting plate and an air cavity is arranged, a first air pipe is arranged on the upper connecting plate, the first air pipe is ensured to be communicated with the air cavity, the other end of the first air pipe is connected with an air inlet port of dust collection equipment, so that the dust-proof component plays a dust-proof role, dust is sucked into the dust collection equipment, and workers can be ensured to work in a healthy environment;
2. the air cavity is arranged into a corrugated pipe structure, the connecting lug plates are arranged at the outward folding positions of the pipe body and the edge positions of the upper connecting plate, the connecting lug plates are provided with second guide rod holes, the mounting plate of the drill body is provided with a first guide rod hole and an air pipe hole, the connecting lug plates are connected through the guide rod, and the guide rod is sleeved with the reset spring, so that the lower end of the upper dustproof assembly and the operating table top can be guaranteed to have enough supporting force while the scalability of the upper dustproof assembly is guaranteed, and the stability of the contact position of the upper dustproof assembly and the operating table top can be guaranteed;
3. and through be provided with the secondary channel on the right side wall at the garbage collection passageway to be connected with the second trachea in the terminal position department of secondary channel, and be connected with dust collecting equipment's inlet port with the other end of second trachea, thereby can be with the tiny dust suction that falls into to dust collecting equipment in, and will let great piece can fall into and collect the utilization among the collecting box.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the mounting plate structure of the present invention;
FIG. 3 is a semi-sectional view of an upper dust guard assembly;
FIG. 4 is an enlarged view of the structure at A in FIG. 3;
FIG. 5 is a semi-sectional view of a waste collection channel;
fig. 6 is an enlarged view of the structure at B in fig. 5.
In the figure: the device comprises a supporting leg 1, an operation table top 2, a supporting rod 3, a top plate 4, a telescopic electric cylinder 5, a drill body 6, a mounting plate 7, an upper dustproof assembly 8, a waste collecting channel 9, a collecting box 10, a through hole 11, a drill bit seat 12, a drill bit 13, a first guide rod hole 14, an air pipe hole 15, an upper connecting plate 16, a lower connecting plate 17, an air cavity 18, a connecting lug plate 19, a guide rod 20, a reset spring 21, a limiting plate 22, a first air pipe 24, a secondary channel 25, a second air pipe 26, a butt strap 27 and an inserting plate 28.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: a car axle borer used in the automobile field comprises a supporting leg 1, an operation table top 2, a supporting rod 3 and a top plate 4, wherein a telescopic electric cylinder 5 is fixedly arranged on the top plate 4, a drill body 6 is fixedly arranged on a telescopic rod of the telescopic electric cylinder 5 through a connecting piece, a mounting plate 7 is integrally formed on the drill body 6, an upper dustproof assembly 8 is arranged on the mounting plate 7, a through hole 10 is arranged on the operation table top 2, a waste material collecting channel 9 is arranged at the position, located at the through hole 11, below the operation table top 2, of the position, a waste material collecting channel 9, a collecting box 10 is arranged below the waste material collecting channel 9, the upper dustproof assembly 8 is formed by combining an upper connecting plate 16, a lower connecting plate 17 and an air cavity 18, a first air pipe 24 is arranged on the upper connecting plate 16, the first air pipe 24 is communicated with the air cavity 18, a drill bit seat 12 is arranged on a rotor at the lower side of the drill body 6, and a drill bit 13 is arranged on the drill seat 12, through setting up the upper dustproof subassembly 8 that constitutes by upper connecting plate 16, lower connecting plate 17 and air cavity 18 combination to set up first trachea 24 on upper connecting plate 16, and guarantee that first trachea 24 is linked together with air cavity 18, and be connected the other end of first trachea 24 and dust collecting equipment's inlet port, thereby play dustproof effect through dustproof subassembly 8, and inhale among the dust collecting equipment, thereby guarantee that the staff can be in and carry out work in the healthy environment.
The collecting box 10 is a rectangular box structure, a cleaning opening is formed in the right side face of the box, and a box door is arranged at the position of the cleaning opening;
the mounting plate 7 is an annular plate, a first guide rod hole 14 and an air pipe hole 15 are formed in the plate body, a first air pipe 24 penetrates through the air pipe hole 15, and the other end of the first air pipe 24 is connected with an air inlet port of the dust collection equipment;
the air cavity 18 on the upper dustproof assembly 8 is of a corrugated pipe structure, the outward folding position of the pipe body and the edge position of the upper connecting plate 16 are integrally formed with a connecting lug plate 19, the connecting lug plate 19 is an annular plate, the plate body of the connecting lug plate is provided with a second guide rod hole, a guide rod 20 is fixedly installed on the plate body of the lower connecting plate 17, the positions of the first guide rod hole 14 and the second guide rod hole correspond to the arrangement position of the guide rod 20, the rod body of the guide rod 20 penetrates through the first guide rod hole 14 and the second guide rod hole, the upper end of the guide rod 20 is provided with a limit plate 22, the guide rod 20 is provided with a circle with equal circumference, the rod body of the guide rod 20 is sleeved with a reset spring 21, the reset spring 21 is arranged between two adjacent connecting lug plates 19, the air cavity 18 is arranged into a corrugated pipe structure, and the connecting lug plates 19 are arranged at the outward folding position of the pipe body and the edge position of the upper connecting plate 16, second guide rod holes are formed in the connecting lug plates 19, first guide rod holes 14 and air pipe holes 15 are formed in the mounting plate 7 of the drill body 6, the connecting lug plates 19 are connected through guide rods 20, and return springs 21 are sleeved on the guide rods 20, so that the scalability of the upper dustproof assembly 8 is guaranteed, meanwhile, sufficient supporting force between the lower end of the upper dustproof assembly 8 and the operating table top 2 can be guaranteed, and the stability of the contact position of the upper dustproof assembly 8 is guaranteed;
when the return spring 21 is in the return state, the air cavity 18 is in the stretched state, and at this time, the drill bit 13 is completely retracted into the inner cavity of the air cavity 18 and arranged, and the drill bit 13 is arranged right above the through hole 11 on the operation table top 2;
a secondary channel 25 is arranged on the right side wall of the waste collection channel 9, a second air pipe 26 is connected to the tail end of the secondary channel 25, the other end of the second air pipe 26 is connected with an air inlet port of the dust collection equipment, the secondary channel 25 is arranged on the right side wall of the waste collection channel 9, the tail end of the secondary channel 25 is connected with the second air pipe 26, the other end of the second air pipe 26 is connected with the air inlet port of the dust collection equipment, so that falling fine dust can be sucked into the dust collection equipment, and larger debris can fall into the collection box 10 for collection and utilization;
the left side wall and the right side wall of the inner cavity of the waste collection channel 9 are fixedly welded with the butt straps 27, the butt straps 27 are arranged in groups, the plug boards 28 are arranged on the butt straps 27, and a gap is reserved between the rear side end of the butt straps 27 and the rear side wall of the inner cavity of the waste collection channel 9, so that the situation that the normal insertion of the plug boards 28 is influenced due to the fact that scraps fall onto the butt straps 27 is avoided;
the working principle is as follows: by arranging the upper dustproof assembly 8 composed of the upper connecting plate 16, the lower connecting plate 17 and the air cavity 18, arranging the first air pipe 24 on the upper connecting plate 16, ensuring that the first air pipe 24 is communicated with the air cavity 18, and connecting the other end of the first air pipe 24 with the air inlet port of the dust collecting equipment, thereby playing a dustproof role through the dustproof assembly 8 and sucking dust into the dust collecting equipment, thereby ensuring that a worker can work in a healthy environment, arranging the air cavity 18 into a bellows structure, arranging the connecting lug plates 19 at the outward folding positions of the pipe body and the edge positions of the upper connecting plate 16, arranging the second guide rod holes on the connecting lug plates 19, arranging the first guide rod hole 14 and the air pipe hole 15 on the mounting plate 7 of the drill body 6, connecting the connecting lug plates 19 through the guide rod 20, and sleeving the return spring 21 on the guide rod 20, therefore, when the scalability of the upper dustproof component 8 is ensured, enough supporting force between the lower end of the upper dustproof component 8 and the operation table top 2 can be ensured, so as to ensure the stability of the contact position, the secondary channel 25 is arranged on the right side wall of the waste collection channel 9, the tail end position of the secondary channel 25 is connected with the second air pipe 26, the other end of the second air pipe 26 is connected with the air inlet port of the dust collection equipment, so that the fallen fine dust can be sucked into the dust collection equipment, and the larger scraps can fall into the collection box 10 to be collected and utilized, when in actual use, an operator puts a workpiece to be processed at the designated position of the operation table top 2, inserts the inserting plate 28 between the attaching plates 27, starts the dust collection equipment, switches on the power supply of the drill body 6, and drives the telescopic electric cylinder 5 to move, thereby realize the drilling operation to can effectually avoid the piece to splash and the dust is wafted, thereby effectively guarantee operating personnel's operational environment.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a car axle perforator for automotive filed, includes supporting leg (1), operation mesa (2), bracing piece (3) and roof (4), its characterized in that: a telescopic electric cylinder (5) is fixedly installed on the top plate (4), a drill body (6) is fixedly installed on a telescopic rod of the telescopic electric cylinder (5) through a connecting piece, an installation plate (7) is integrally formed on the drill body (6), an upper dustproof assembly (8) is installed on the installation plate (7), a through hole (10) is formed in the operation table top (2), a waste collecting channel (9) is arranged at the position, located on the through hole (11), below the operation table top (2), a collecting box (10) is arranged below the waste collecting channel (9), the upper dustproof assembly (8) is formed by combining an upper connecting plate (16), a lower connecting plate (17) and an air cavity (18), a first air pipe (24) is arranged on the upper connecting plate (16), the first air pipe (24) is communicated with the air cavity (18), a drill seat (12) is arranged on a lower rotor of the drill body (6), a drill bit (13) is arranged on a drill bit seat (12).
2. An automotive axle drill for automotive applications according to claim 1, characterized in that: the collecting box (10) is of a rectangular box body structure, a cleaning opening is formed in the right side face of the box body, and a box door is arranged at the position of the cleaning opening.
3. An automotive axle drill for automotive applications according to claim 1, characterized in that: the mounting plate (7) is an annular plate, a first guide rod hole (14) and an air pipe hole (15) are formed in the plate body of the mounting plate, a first air pipe (24) penetrates through the air pipe hole (15), and the other end of the first air pipe (24) is connected with an air inlet port of the dust collection equipment.
4. A car axle drill for the automotive field according to claim 3, wherein: air cavity (18) on the last dustproof subassembly (8) are bellows structure, and the outside fold position department of its body and the border position department homogeneous body shaping of upper connecting plate (16) have connection otic placode (19), connection otic placode (19) are the annular plate, and all seted up the second guide rod hole on its plate body.
5. An automotive axle drill for automotive applications according to claim 4, characterized in that: the utility model discloses a lead screw, including the lower connecting plate, fixed mounting has guide arm (20) on the plate body of lower connecting plate (17), the position of seting up in first guide rod hole (14), second guide rod hole all corresponds with the position that sets up of guide arm (20), and passes the setting among first guide rod hole (14), the second guide rod hole of the body of rod of guide arm (20), the upper end of guide arm (20) is provided with limiting plate (22).
6. An automotive axle drill for automotive applications according to claim 5, characterized in that: the guide rod (20) is provided with a circle for the equipartition circumference, and the body of rod of guide rod (20) is overlapped and is equipped with reset spring (21), reset spring (21) set up for being located between two adjacent connection otic placodes (19).
7. An automotive axle drill for automotive applications according to claim 6, characterized in that: when the return spring (21) is in a return state, the air cavity (18) of the return spring is in a stretched state, the drill bit (13) is completely retracted into the inner cavity of the air cavity (18) and arranged, and the drill bit (13) is arranged right above the through hole (11) on the operation table top (2).
8. An automotive axle drill for automotive applications according to claim 7, characterized in that: a secondary channel (25) is arranged on the right side wall of the waste collecting channel (9), a second air pipe (26) is connected to the tail end of the secondary channel (25), and the other end of the second air pipe (26) is connected with an air inlet port of the dust collection equipment.
9. An automotive axle drill for automotive applications according to claim 8, characterized in that: equal fixed welding has attachment strap (27) on the lateral wall about the inner chamber of garbage collection passageway (9), attachment strap (27) are for setting up in groups, and install picture peg (28) on attachment strap (27), leave the clearance between the back side of attachment strap (27) and the back lateral wall of garbage collection passageway (9) inner chamber.
CN202111059692.3A 2021-09-10 2021-09-10 Automobile axle drill used in automobile field Pending CN113714532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111059692.3A CN113714532A (en) 2021-09-10 2021-09-10 Automobile axle drill used in automobile field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111059692.3A CN113714532A (en) 2021-09-10 2021-09-10 Automobile axle drill used in automobile field

Publications (1)

Publication Number Publication Date
CN113714532A true CN113714532A (en) 2021-11-30

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ID=78683103

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111059692.3A Pending CN113714532A (en) 2021-09-10 2021-09-10 Automobile axle drill used in automobile field

Country Status (1)

Country Link
CN (1) CN113714532A (en)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201823960U (en) * 2010-07-08 2011-05-11 大连水产学院 Hand-held electric drill dust keeper
CN206747663U (en) * 2017-03-02 2017-12-15 天津澳普林特塑胶有限公司 A kind of milling machine of processing mold
CN208117373U (en) * 2018-08-25 2018-11-20 东莞市峰伟数控机床有限公司 A kind of scrap collection mechanism of numerical control machining center
CN208147481U (en) * 2018-04-27 2018-11-27 孟开仁 A kind of carving and milling machine exhaust gas purification and treatment device
CN109079570A (en) * 2018-08-09 2018-12-25 安徽省皖工电动车科技有限公司 A kind of drilling part equipment for electric sanitation truck production
CN208276595U (en) * 2018-05-24 2018-12-25 保定中泰新能源科技有限公司 Corner key machine-cut, which is cut, uses dust treatment device
CN208976873U (en) * 2018-11-19 2019-06-14 佛山市顺帆机械有限公司 A kind of belt pulley drilling device of automatic dust removing
CN209681756U (en) * 2019-04-13 2019-11-26 郑伟鹏 A kind of Ultra-precision CNC Machine of high precision electric control
CN209919434U (en) * 2019-04-23 2020-01-10 昆明市轧钢厂 Hidden metal scrap collecting device
CN210589675U (en) * 2019-08-30 2020-05-22 贵州久圣包装有限公司 Dust-proof type drilling equipment is used in carton production
CN112518411A (en) * 2020-12-07 2021-03-19 徐保龙 Automobile brake disc drilling center

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201823960U (en) * 2010-07-08 2011-05-11 大连水产学院 Hand-held electric drill dust keeper
CN206747663U (en) * 2017-03-02 2017-12-15 天津澳普林特塑胶有限公司 A kind of milling machine of processing mold
CN208147481U (en) * 2018-04-27 2018-11-27 孟开仁 A kind of carving and milling machine exhaust gas purification and treatment device
CN208276595U (en) * 2018-05-24 2018-12-25 保定中泰新能源科技有限公司 Corner key machine-cut, which is cut, uses dust treatment device
CN109079570A (en) * 2018-08-09 2018-12-25 安徽省皖工电动车科技有限公司 A kind of drilling part equipment for electric sanitation truck production
CN208117373U (en) * 2018-08-25 2018-11-20 东莞市峰伟数控机床有限公司 A kind of scrap collection mechanism of numerical control machining center
CN208976873U (en) * 2018-11-19 2019-06-14 佛山市顺帆机械有限公司 A kind of belt pulley drilling device of automatic dust removing
CN209681756U (en) * 2019-04-13 2019-11-26 郑伟鹏 A kind of Ultra-precision CNC Machine of high precision electric control
CN209919434U (en) * 2019-04-23 2020-01-10 昆明市轧钢厂 Hidden metal scrap collecting device
CN210589675U (en) * 2019-08-30 2020-05-22 贵州久圣包装有限公司 Dust-proof type drilling equipment is used in carton production
CN112518411A (en) * 2020-12-07 2021-03-19 徐保龙 Automobile brake disc drilling center

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Application publication date: 20211130