CN110666205A - Drilling machine screwdown structure - Google Patents
Drilling machine screwdown structure Download PDFInfo
- Publication number
- CN110666205A CN110666205A CN201911014874.1A CN201911014874A CN110666205A CN 110666205 A CN110666205 A CN 110666205A CN 201911014874 A CN201911014874 A CN 201911014874A CN 110666205 A CN110666205 A CN 110666205A
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- CN
- China
- Prior art keywords
- fixing support
- pedal
- band pulley
- connecting seat
- drill press
- Prior art date
- 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
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 238000003466 welding Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 2
- 230000033001 locomotion Effects 0.000 description 7
- 238000003754 machining Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B39/00—General-purpose boring or drilling machines or devices; Sets of boring and/or drilling machines
- B23B39/10—General-purpose boring or drilling machines or devices; Sets of boring and/or drilling machines characterised by the drive, e.g. by fluid-pressure drive pneumatic power drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
Abstract
The invention discloses a drill press-down structure which comprises a fixing mechanism, a power mechanism and a transmission mechanism, wherein the fixing mechanism is arranged on a base of a drill press, the power mechanism is arranged on the fixing mechanism and is used for providing operation energy for an operator to the whole press-down structure conveniently, the transmission mechanism is arranged on the power mechanism and is used for transmitting power to a rocker shaft of the drill press, the transmission mechanism is connected with the power mechanism, and the power mechanism is connected with the fixing mechanism. The invention can save labor and quickly realize the pressing and lifting of the drill bit of the drilling machine, and changes the traditional pressing depending on hands into the force application by feet, so that the processing process is controllable along with the feeling, and the invention frees both hands and saves labor.
Description
Technical Field
The invention relates to the technical field of drilling machines, in particular to a pressing structure of a drilling machine.
Background
The drilling machine is a machine tool which mainly uses a drill bit to process holes on a workpiece, usually, the drill bit rotates to move mainly, the drill bit moves axially to move in a feeding mode, the drilling machine is simple in structure, machining precision is relatively low, through holes and blind holes can be drilled, special cutters can be replaced, and the drilling machine can expand, ream and ream holes or perform tapping and other machining processes.
Because the drilling machine is operated by a single person, when the drilling hole is large, the manual rotating rocker arm is hard to press downwards.
Disclosure of Invention
The invention aims to solve the problems and provide a press-down structure of a drilling machine.
The invention realizes the purpose through the following technical scheme:
the utility model provides a drilling machine screwdown structure, includes fixed establishment, fixed establishment installs on the base of drilling machine, and install be used for making things convenient for the operator to provide the power unit of running energy for whole screwdown structure on the fixed establishment, still include the setting be used for the drive mechanism of the rocking arm axle transmission power of drilling machine on the power unit, drive mechanism connect in power unit, power unit connect in fixed establishment.
Further setting: the transmission mechanism comprises a crankshaft and a first belt wheel, wherein the first belt wheel is arranged at one end of the crankshaft, a transmission belt is arranged on the first belt wheel, a second belt wheel is arranged above the first belt wheel at the other end of the transmission belt, and the second belt wheel is connected with the first belt wheel through the transmission belt.
So set up, the drive mechanism is used for transmitting the motion to the rocking arm axle and makes the drill bit move up and down.
Further setting: the transmission mechanism comprises a crankshaft and a first belt wheel, wherein one end of the crankshaft is provided with the first belt wheel, a transmission belt is arranged on the first belt wheel, the other end of the transmission belt is arranged above the first belt wheel and is provided with a third belt wheel, the third belt wheel is connected with the first belt wheel through the transmission belt, a handle is arranged on the third belt wheel, and a protective sleeve is sleeved on the outer side of the handle.
According to the arrangement, the drill bit is lifted by manually rotating the third belt wheel.
Further setting: the power mechanism comprises a first pedal and an anti-slip pad, the anti-slip pad is arranged above the first pedal, a first connecting seat is arranged at the front part of the upper end of the first pedal, a first connecting rod is arranged on the first connecting seat, a second pedal is arranged on one side of the first pedal, a second connecting seat is arranged at the rear part of the upper end of the second pedal, a second connecting rod is arranged on the second connecting seat, the second connecting rod is rotatably connected with the second connecting seat through a rotating shaft, and a connector is arranged at the other end of the second connecting rod.
According to the arrangement, the power mechanism is used for providing power for rotation of the drill press rocker shaft.
Further setting: fixing mechanism includes first fixing support, second fixing support, third fixing support, one side of third fixing support is provided with first fixing support with be provided with between the third fixing support second fixing support, first fixing support second fixing support all be provided with the bearing on the third fixing support be close to on the first fixing support one side of second fixing support be close to on the third fixing support one side of second fixing support and all be provided with the round pin axle on the both sides terminal surface of second fixing support, the round pin axle with first fixing support second fixing support third fixing support passes through welded connection.
In such an arrangement, the fixing mechanism is used for installing and fixing the power mechanism and the transmission mechanism.
Further setting: the first belt wheel is connected with the crankshaft through a key.
So set up, make through the key-type connection first band pulley with it is reliable to connect the fastening between the bent axle.
Further setting: the handle is in threaded connection with the third belt wheel.
So set up, through threaded connection be convenient for carry out the dismouting between the two of interconnect.
Further setting: the anti-slip mat is connected with the first pedal through screws, and the first connecting seat is connected with the first pedal through screws.
According to the arrangement, the antiskid pad and the first connecting seat are conveniently installed and fixed through screw connection.
Further setting: the first connecting rod is rotatably connected with the first connecting seat through a rotating shaft, and the second connecting seat is connected with the second pedal through a screw.
So set up, rotate through the pivot and connect and conveniently take place relative motion between the two, it is convenient for right through the screwed connection the dismouting of second connecting seat is fixed.
Further setting: the connector with the second connecting rod passes through threaded connection.
So set up, be convenient for install fixedly between the two of connecting through threaded connection.
Compared with the prior art, the invention has the following beneficial effects:
the drilling machine drill bit can be pressed and lifted in a labor-saving and quick mode, the traditional pressing depending on the hand is changed into the force application by the foot, the machining process is controllable along with the feeling, and both hands are liberated and labor is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a first embodiment of a drill press down structure according to the present invention;
FIG. 2 is a second schematic view of a first embodiment of a drill press of the present invention;
FIG. 3 is a front view of a first embodiment of a drill press of the present invention;
FIG. 4 is a schematic structural view of a second embodiment of a press down structure of a drilling machine according to the present invention;
FIG. 5 is a perspective view of a crankshaft of a press-down structure of a drill press according to the present invention;
FIG. 6 is a perspective view of a third pulley of a drill press down structure according to the present invention.
The reference numerals are explained below:
1. a fixing mechanism; 101. a first fixed support; 102. a second fixed support; 103. a third fixed support; 104. a bearing; 105. a pin shaft; 2. a power mechanism; 201. a non-slip mat; 202. a first foot pedal; 203. a first connecting seat; 204. a first link; 205. a second foot pedal; 206. a second connecting seat; 207. a second link; 208. a connector; 3. a transmission mechanism; 301. a crankshaft; 302. a first pulley; 303. a drive belt; 304. a second pulley; 305. a third belt pulley; 306. a handle; 307. a sheath.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be further described with reference to the accompanying drawings in which:
example 1
As shown in fig. 1, 2, 3, and 5, a press-down structure of a drilling machine includes a fixing mechanism 1, the fixing mechanism 1 is installed on a base of the drilling machine, and an actuating mechanism 2 is installed on the fixing mechanism 1 and is used for providing operating energy for an operator to the whole press-down structure, and the press-down structure further includes a transmission mechanism 3 which is arranged on the actuating mechanism 2 and is used for transmitting power to a rocker shaft of the drilling machine, wherein the transmission mechanism 3 is connected to the actuating mechanism 2, and the actuating mechanism 2 is connected to the fixing mechanism 1.
Preferably: the transmission mechanism 3 comprises a crankshaft 301 and a first belt pulley 302, wherein one end of the crankshaft 301 is provided with the first belt pulley 302, a transmission belt 303 is arranged on the first belt pulley 302, the other end of the transmission belt 303 is provided with a second belt pulley 304 above the first belt pulley 302, the second belt pulley 304 is connected with the first belt pulley 302 through the transmission belt 303, and the transmission mechanism 3 is used for transmitting motion to the rocker shaft to enable the drill bit to move up and down; the power mechanism 2 comprises a first pedal 202 and an anti-slip mat 201, the anti-slip mat 201 is arranged above the first pedal 202, a first connecting seat 203 is arranged at the front part of the upper end of the first pedal 202, a first connecting rod 204 is arranged on the first connecting seat 203, a second pedal 205 is arranged on one side of the first pedal 202, a second connecting seat 206 is arranged at the rear part of the upper end of the second pedal 205, a second connecting rod 207 is arranged on the second connecting seat 206, the second connecting rod 207 is rotatably connected with the second connecting seat 206 through a rotating shaft, a connecting head 208 is arranged at the other end of the second connecting rod 207, and the power mechanism 2 is used for providing power for the rotation of a rocker shaft of the drilling machine; the fixing mechanism 1 comprises a first fixing support 101, a second fixing support 102 and a third fixing support 103, wherein a first fixing support 101 is arranged on one side of the third fixing support 103, the second fixing support 102 is arranged between the first fixing support 101 and the third fixing support 103, bearings 104 are arranged on the first fixing support 101, the second fixing support 102 and the third fixing support 103, pin shafts 105 are arranged on one side of the first fixing support 101 close to the second fixing support 102, one side of the third fixing support 103 close to the second fixing support 102 and two side end faces of the second fixing support 102, the pin shafts 105 are connected with the first fixing support 101, the second fixing support 102 and the third fixing support 103 in a welding mode, and the fixing mechanism 1 is used for installing a fixing power mechanism 2 and a transmission mechanism 3; the first belt wheel 302 is in key connection with the crankshaft 301, and the first belt wheel 302 and the crankshaft 301 are connected and fastened reliably through the key connection; the handle 306 is connected with the third belt wheel 305 through threads, and the handle and the third belt wheel are connected through threads to be convenient for assembly and disassembly; the non-slip mat 201 is connected with the first pedal plate 202 through screws, the first connecting seat 203 is connected with the first pedal plate 202 through screws, and the non-slip mat 201 and the first connecting seat 203 are conveniently installed and fixed through the screw connection; the first connecting rod 204 is rotatably connected with the first connecting seat 203 through a rotating shaft, the second connecting seat 206 is connected with the second pedal plate 205 through a screw, relative motion between the first connecting seat and the second pedal plate is facilitated through the rotating connection of the rotating shaft, and the second connecting seat 206 is conveniently dismounted and fixed through the screw connection; the connector 208 is connected with the second connecting rod 207 through threads, and the two connected components are conveniently installed and fixed through the threads.
Example 2
As shown in fig. 4, 5 and 6, the pressing structure of the drilling machine comprises a fixing mechanism 1, wherein the fixing mechanism 1 is installed on a base of the drilling machine, an actuating mechanism 2 is installed on the fixing mechanism 1 and used for providing operating energy for an operator to the whole pressing structure, the pressing structure further comprises a transmission mechanism 3 which is arranged on the actuating mechanism 2 and used for transmitting power to a rocker shaft of the drilling machine, the transmission mechanism 3 is connected to the actuating mechanism 2, and the actuating mechanism 2 is connected to the fixing mechanism 1.
Preferably: the transmission mechanism 3 comprises a crankshaft 301 and a first belt pulley 302, wherein one end of the crankshaft 301 is provided with the first belt pulley 302, the first belt pulley 302 is provided with a transmission belt 303, the other end of the transmission belt 303 is provided with a third belt pulley 305 above the first belt pulley 302, the third belt pulley 305 is connected with the first belt pulley 302 through the transmission belt 303, the third belt pulley 305 is provided with a handle 306, the outer side of the handle 306 is sleeved with a sheath 307, and the drill bit is lifted through manually rotating the third belt pulley 305; the power mechanism 2 comprises a first pedal 202 and an anti-slip mat 201, the anti-slip mat 201 is arranged above the first pedal 202, a first connecting seat 203 is arranged at the front part of the upper end of the first pedal 202, a first connecting rod 204 is arranged on the first connecting seat 203, a second pedal 205 is arranged on one side of the first pedal 202, a second connecting seat 206 is arranged at the rear part of the upper end of the second pedal 205, a second connecting rod 207 is arranged on the second connecting seat 206, the second connecting rod 207 is rotatably connected with the second connecting seat 206 through a rotating shaft, a connecting head 208 is arranged at the other end of the second connecting rod 207, and the power mechanism 2 is used for providing power for the rotation of a rocker shaft of the drilling machine; the fixing mechanism 1 comprises a first fixing support 101, a second fixing support 102 and a third fixing support 103, wherein a first fixing support 101 is arranged on one side of the third fixing support 103, the second fixing support 102 is arranged between the first fixing support 101 and the third fixing support 103, bearings 104 are arranged on the first fixing support 101, the second fixing support 102 and the third fixing support 103, pin shafts 105 are arranged on one side of the first fixing support 101 close to the second fixing support 102, one side of the third fixing support 103 close to the second fixing support 102 and two side end faces of the second fixing support 102, the pin shafts 105 are connected with the first fixing support 101, the second fixing support 102 and the third fixing support 103 in a welding mode, and the fixing mechanism 1 is used for installing a fixing power mechanism 2 and a transmission mechanism 3; the first belt wheel 302 is in key connection with the crankshaft 301, and the first belt wheel 302 and the crankshaft 301 are connected and fastened reliably through the key connection; the handle 306 is connected with the third belt wheel 305 through threads, and the handle and the third belt wheel are connected through threads to be convenient for assembly and disassembly; the non-slip mat 201 is connected with the first pedal plate 202 through screws, the first connecting seat 203 is connected with the first pedal plate 202 through screws, and the non-slip mat 201 and the first connecting seat 203 are conveniently installed and fixed through the screw connection; the first connecting rod 204 is rotatably connected with the first connecting seat 203 through a rotating shaft, the second connecting seat 206 is connected with the second pedal plate 205 through a screw, relative motion between the first connecting seat and the second pedal plate is facilitated through the rotating connection of the rotating shaft, and the second connecting seat 206 is conveniently dismounted and fixed through the screw connection; the connector 208 is connected with the second connecting rod 207 through threads, and the two connected components are conveniently installed and fixed through the threads.
During operation, the first fixed support 101, the second fixed support 102 and the third fixed support 103 are respectively installed on a base of a drilling machine, then a foot pedal presses the first pedal 202 with force, the first pedal 202 swings around a pin shaft 105, when the first pedal 202 moves, the first connecting rod 204 is driven to move, the first connecting rod 204 transfers the movement to the crankshaft 301 and enables the crankshaft 301 to rotate, the crankshaft 301 rotates and drives the first belt pulley 302 to rotate, the rotation is transferred to the second belt pulley 304 through the transmission of a transmission belt 303, the second belt pulley 304 is connected with a rocker shaft of the drilling machine, so that a drill bit descends to drill a workpiece, when the return stroke returns, the second pedal 205 is pressed with the foot to swing around the pin shaft 105, when the second pedal 205 moves, the second connecting rod 207 is driven to move, the second connecting rod 207 transfers the movement to the crankshaft 301 and enables the crankshaft 301 to rotate, the crankshaft 301 rotates and drives the first belt pulley 302 to rotate, the rotation is transmitted to the second belt wheel 304 through the transmission of the transmission belt 303, so that the drill bit is lifted, or the handle 306 is directly held by hand to rotate to drive the third belt wheel 305 to rotate, so that the drill bit is lifted.
Through adopting this drilling machine screwdown structure, can laborsaving and quick realization drilling machine drill bit push down with rise, and press traditional dependence hand and become with the foot application of force for the course of working is controllable along with the sensation, liberates both hands again and saves strength.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (10)
1. The utility model provides a drilling machine screwdown structure, includes fixed establishment (1), fixed establishment (1) is installed on the base of drilling machine, and is installed be used for making things convenient for operator to provide power unit (2) of running energy for whole screwdown structure on fixed establishment (1), its characterized in that: the drilling machine is characterized by further comprising a transmission mechanism (3) which is arranged on the power mechanism (2) and used for transmitting power to a rocker shaft of the drilling machine, wherein the transmission mechanism (3) is connected to the power mechanism (2), and the power mechanism (2) is connected to the fixing mechanism (1).
2. The drill press down structure of claim 1, wherein: drive mechanism (3) include bent axle (301), first band pulley (302), the one end of bent axle (301) is provided with first band pulley (302), be provided with driving belt (303) on first band pulley (302), the other end of driving belt (303) is in the top of first band pulley (302) is provided with second band pulley (304), second band pulley (304) with first band pulley (302) pass through driving belt (303) are connected.
3. The drill press down structure of claim 1, wherein: drive mechanism (3) are including bent axle (301), first band pulley (302), the one end of bent axle (301) is provided with first band pulley (302), be provided with driving belt (303) on first band pulley (302), driving belt (303)'s the other end is in the top of first band pulley (302) is provided with third band pulley (305), third band pulley (305) with first band pulley (302) pass through driving belt (303) are connected, be provided with handle (306) on third band pulley (305), sheath (307) have been cup jointed in the outside of handle (306).
4. The drill press down structure of claim 1, wherein: the power mechanism (2) comprises a first pedal (202) and an anti-slip pad (201), the anti-slip pad (201) is arranged above the first pedal (202), a first connecting seat (203) is arranged at the front part of the upper end of the first pedal (202), a first connecting rod (204) is arranged on the first connecting seat (203), a second pedal (205) is arranged on one side of the first pedal (202), a second connecting seat (206) is arranged at the rear part of the upper end of the second pedal (205), a second connecting rod (207) is arranged on the second connecting seat (206), the second connecting rod (207) is rotatably connected with the second connecting seat (206) through a rotating shaft, and a connecting head (208) is arranged at the other end of the second connecting rod (207).
5. The drill press down structure of claim 1, wherein: the fixing mechanism (1) comprises a first fixing support (101), a second fixing support (102) and a third fixing support (103), wherein the first fixing support (101) is arranged on one side of the third fixing support (103), the second fixing support (102) is arranged between the first fixing support (101) and the third fixing support (103), the first fixing support (101), the second fixing support (102) and the third fixing support (103) are respectively provided with a bearing (104), the first fixing support (101) is close to one side of the second fixing support (102), the third fixing support (103) is close to one side of the second fixing support (102) and two side end faces of the second fixing support (102) are respectively provided with a pin shaft (105), and the pin shafts (105) and the first fixing support (101), The second fixed support (102) and the third fixed support (103) are connected through welding.
6. The drill press down structure of claim 2, wherein: the first pulley (302) is connected with the crankshaft (301) through a key.
7. A drill press down structure according to claim 3 wherein: the handle (306) is in threaded connection with the third pulley (305).
8. The drill press down structure of claim 4, wherein: the non-slip mat (201) is connected with the first pedal (202) through screws, and the first connecting seat (203) is connected with the first pedal (202) through screws.
9. The drill press down structure of claim 4, wherein: the first connecting rod (204) is rotatably connected with the first connecting seat (203) through a rotating shaft, and the second connecting seat (206) is connected with the second pedal (205) through a screw.
10. The drill press down structure of claim 4, wherein: the connecting head (208) is in threaded connection with the second connecting rod (207).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911014874.1A CN110666205A (en) | 2019-10-24 | 2019-10-24 | Drilling machine screwdown structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911014874.1A CN110666205A (en) | 2019-10-24 | 2019-10-24 | Drilling machine screwdown structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110666205A true CN110666205A (en) | 2020-01-10 |
Family
ID=69083877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911014874.1A Pending CN110666205A (en) | 2019-10-24 | 2019-10-24 | Drilling machine screwdown structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110666205A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114393231A (en) * | 2022-02-28 | 2022-04-26 | 曹家锋 | Laborsaving environment-friendly five metals perforating device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2132606Y (en) * | 1992-04-22 | 1993-05-12 | 陈尚庆 | Combined wood-wooking machinery |
| CA2188501A1 (en) * | 1996-05-29 | 1997-11-29 | Todd Laverne Stofflet | Oscillatory motion device for drill press |
| CN204366096U (en) * | 2014-11-25 | 2015-06-03 | 文成县顺昌金属实业有限公司 | A kind of multifunctional drill |
-
2019
- 2019-10-24 CN CN201911014874.1A patent/CN110666205A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2132606Y (en) * | 1992-04-22 | 1993-05-12 | 陈尚庆 | Combined wood-wooking machinery |
| CA2188501A1 (en) * | 1996-05-29 | 1997-11-29 | Todd Laverne Stofflet | Oscillatory motion device for drill press |
| CN204366096U (en) * | 2014-11-25 | 2015-06-03 | 文成县顺昌金属实业有限公司 | A kind of multifunctional drill |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114393231A (en) * | 2022-02-28 | 2022-04-26 | 曹家锋 | Laborsaving environment-friendly five metals perforating device |
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