CN108527006B - Digital display speed measuring mechanism for main shaft of milling and drilling machine - Google Patents
Digital display speed measuring mechanism for main shaft of milling and drilling machine Download PDFInfo
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- CN108527006B CN108527006B CN201810345095.9A CN201810345095A CN108527006B CN 108527006 B CN108527006 B CN 108527006B CN 201810345095 A CN201810345095 A CN 201810345095A CN 108527006 B CN108527006 B CN 108527006B
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- 238000005553 drilling Methods 0.000 title claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 abstract description 10
- 238000003466 welding Methods 0.000 abstract 1
- 238000010586 diagrams Methods 0.000 description 5
- 230000001939 inductive effects Effects 0.000 description 2
- 239000011257 shell materials Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000004301 light adaptation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, 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
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/10—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting speed or number of revolutions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, 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
- B23Q11/00—Accessories 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
Abstract
Description
Technical Field
The invention relates to the technical field of mechanical detection, in particular to a digital display speed measuring mechanism for a main shaft of a milling and drilling machine.
Background
the drilling and milling machine is a machine tool device integrating drilling, milling, boring and grinding into a whole, and is applied to the processing of small and medium-sized parts. The invention with application number 201710686371.3 discloses a digital display speed measuring mechanism for a main shaft of a milling and drilling machine, belonging to the technical field of machine tools; aiming at the problem that a digital display speed measuring mechanism of a main shaft of a milling and drilling machine in the prior art is inconvenient to install and take down, the invention adopts the following scheme: the main shaft speed sensor comprises a speed induction coil fixed on the outer surface of a spline sleeve through a set screw, the spline sleeve is sleeved on a main shaft spline section, and the main shaft is fixed on a main shaft box shell through a high-speed deep groove ball bearing; the photoelectric sensor is fixed on the shell of the spindle box through a bracket; the speed induction ring comprises an upper annular coded disc and a lower annular fixed ring, light holes are uniformly distributed in the circumferential direction on the coded disc, and at least one threaded hole is formed in the fixed ring, perpendicular to the outer surface of the spline sleeve; the photoelectric sensor comprises a light source and a light receiving part, the light source and the light receiving part are respectively arranged above and below the code disc, the photoelectric sensor is connected with the controller, and the controller is connected with the digital display screen; the rotary speed display stand has the advantages of convenience in installation and removal, simple structure and real-time display of the rotary speed.
The invention is inconvenient for fixing the velometer, so that the velometer is easy to shake during working, and the velometer is easy to collide and damage during idling, so that the enterprise cost is increased, and therefore, the numerical display speed measuring mechanism for the main shaft of the drilling and milling machine is provided for solving the problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a digital display speed measuring mechanism for a main shaft of a milling and drilling machine.
In order to achieve the purpose, the invention adopts the following technical scheme:
a digital display speed measuring mechanism for a spindle of a drilling and milling machine comprises a spindle body, wherein a fixed block is sleeved on the spindle body, a mounting groove is formed in one side of the fixed block, a speed measurer is arranged in the mounting groove, sliding columns are arranged on two sides of the speed measurer, the two sliding columns are slidably mounted in the mounting groove and are in contact with the speed measurer, two first motors are fixedly and symmetrically mounted on one side of the fixed block and are respectively positioned on two sides of the mounting groove, first chain wheels are welded on output shafts of the two first motors, first chains are meshed on the two first chain wheels, a first rotating rod is rotatably mounted on one side of the fixed block, a second chain wheel is welded at one end of the first rotating rod, the two second chain wheels are respectively in transmission connection with the first chain wheels through the first chains, two placing cavities are formed in the fixed block and are positioned on two sides of the mounting groove, one end of each of the two first rotating rods extends into the two placing cavities respectively and is welded with a first bevel gear, the inner wall of one side, far away from each other, of each of the two placing cavities is rotatably provided with a first threaded rod, each of the two first threaded rods is welded with a second bevel gear which is meshed with the two first bevel gears respectively, one end, close to each other, of each of the two first threaded rods is in threaded connection with a first threaded block, the two first threaded blocks are slidably arranged in the two placing cavities respectively, the inner walls of the two sides of the mounting groove are provided with sliding holes respectively, the two sliding holes are communicated with the two placing cavities respectively, one side, close to each other, of the two threaded blocks is welded with a pressing plate, the two pressing plates are matched with the two sliding holes respectively and are in contact with the two sliding columns respectively, one side of the two sliding columns is provided with a fixing, one side of each of the two fixing columns is welded with the same protection plate, one side of each of the two fixing columns, which is positioned in the fixed groove and close to the fixed groove, is provided with a clamping groove, the two clamping grooves are respectively clamped with a clamping block, one side of each of the two clamping blocks, which is close to the fixed groove, is welded with a second threaded block, the inner walls of the two sides of the mounting groove are respectively fixedly provided with a second motor, the output shafts of the two second motors are respectively welded with a third conical gear, the two third conical gears are respectively engaged with a second chain, the inner walls of the two sides of the mounting groove are respectively welded with a support rod, one side of each of the two support rods is welded with a fixed rod, the two fixed rods are respectively and rotatably provided with a second rotating rod, one end of each of the two second rotating rods, which is close to the other end is welded with a fourth, the two rotating holes are communicated with the two fixing grooves respectively, and one ends, far away from each other, of the two second rotating rods extend into the two rotating holes respectively and are in threaded connection with the two second threaded blocks respectively.
preferably, two rotating holes are formed in one side of the fixing block, first bearings are fixedly mounted in the two rotating holes, and the two first bearings are sleeved on the two first rotating rods respectively.
Preferably, two are placed and all have been seted up on the one side inner wall that the chamber kept away from each other and rotate the groove, and two rotate equal fixed mounting in the groove has the second bearing, and two second bearings overlap respectively and establish on two first threaded rods.
Preferably, two are placed and all have welded first slide rail on the chamber is close to one side inner wall of first motor, and two first screw thread blocks all have welded first slider on being close to one side inner wall of first motor, and two first sliders are slidable mounting respectively on two first slide rails.
Preferably, first screw hole has all been seted up to one side that two first screw thread blocks kept away from each other, all is equipped with first internal thread in two first screw holes, all is equipped with first external screw thread on two first threaded rods, first internal thread and first external screw thread looks adaptation.
Preferably, a second threaded hole is formed in one side, close to each other, of each of the two second threaded blocks, a second internal thread is arranged in each second threaded hole, a second external thread is arranged at one end, far away from each other, of each of the two second threaded rods, and the second internal thread is matched with the second external thread.
Preferably, the two rotating holes are internally provided with third bearings, and the two third bearings are respectively sleeved on the two second threaded rods.
Preferably, the inner walls of the two rotating holes are welded with second sliding rails, one side of each of the two second threaded blocks is welded with a second sliding block, and the two second sliding blocks are respectively slidably mounted on the two second sliding rails.
Preferably, the mounting groove is welded with a third slide rail on the inner wall of one side, away from the opening of the mounting groove, a third slide block is welded on one side of each of the two sliding columns, and the two third slide blocks are slidably mounted on the third slide rail.
Preferably, round holes are formed in the two fixing rods, fourth bearings are fixedly mounted in the two round holes, and the two fourth bearings are sleeved on the two second rotating rods respectively.
Compared with the prior art, the invention has the beneficial effects that:
(1) Through the matching of the sliding column, the first motor, the first chain wheel, the first chain, the first rotating rod, the second chain wheel, the placing cavity, the first conical gear, the first threaded rod, the second conical gear, the first threaded block, the sliding hole and the pressing plate, an output shaft of the first motor drives the first chain wheel to rotate, the first chain wheel rotates to drive the first chain wheel to move, the first chain wheel moves to drive the second chain wheel to rotate, the second chain wheel rotates to drive the first rotating rod to rotate, the first rotating rod rotates to drive the first conical gear to rotate, the first conical gear rotates to drive the second conical gear to rotate, the second conical gear rotates to drive the first threaded rod to rotate, the first threaded rod rotates to drive the first threaded block to move, the first threaded block drives the pressing plate to move, and the pressing plate drives the sliding column to move;
(2) Through the matching of the clamping groove, the clamping block, the second threaded block, the second motor, the third conical gear, the second chain, the supporting rod, the fixing rod, the second rotating rod and the fourth chain wheel, the output shaft of the second motor drives the third conical gear to rotate, the third conical gear drives the second chain to move, the second chain drives the fourth chain wheel to rotate, the fourth chain wheel drives the second rotating rod to rotate, the second rotating rod drives the second threaded block to move, and the second threaded block drives the clamping block to move into the clamping groove;
The fixing device is convenient for fixing and protecting the velometer, and has a simple structure and convenient use.
Drawings
FIG. 1 is a schematic structural diagram of a digital display speed measuring mechanism of a milling and drilling machine spindle according to the present invention;
FIG. 2 is a schematic structural diagram of a part A of a digital display speed measuring mechanism of a milling and drilling machine spindle according to the present invention;
FIG. 3 is a schematic structural diagram of a part B of a digital display speed measuring mechanism of a milling and drilling machine spindle according to the present invention;
FIG. 4 is a schematic structural diagram of a first rotating rod of a digital display speed measuring mechanism of a milling and drilling machine spindle according to the present invention;
Fig. 5 is a schematic three-dimensional structural diagram of a fixture block of the digital display speed measurement mechanism for the spindle of the milling and drilling machine, which is provided by the invention.
in the figure: the main shaft comprises a main shaft body 1, a fixing block 2, a mounting groove 3, a velometer 4, a sliding column 5, a first motor 6, a first chain wheel 7, a first chain 8, a first rotating rod 9, a second chain wheel 10, a placing cavity 11, a first conical gear 12, a first threaded rod 13, a second conical gear 14, a first threaded block 15, a sliding hole 16, a pressing plate 17, a fixing groove 18, a fixing column 19, a protecting plate 20, a clamping groove 21, a clamping block 22, a second threaded block 23, a second motor 24, a third conical gear 25, a second chain 26, a supporting rod 27, a fixing rod 28, a second rotating rod 29, a fourth chain wheel 30 and a rotating hole 31.
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.
Referring to fig. 1-5, a digital display speed measuring mechanism for a spindle of a drilling and milling machine comprises a spindle body 1, wherein a fixed block 2 is sleeved on the spindle body 1, one side of the fixed block 2 is provided with an installation groove 3, a speed detector 4 is arranged in the installation groove 3, two sliding columns 5 are arranged on two sides of the speed detector 4, the two sliding columns 5 are slidably arranged in the installation groove 3 and are in contact with the speed detector 4, one side of the fixed block 2 is fixedly and symmetrically provided with two first motors 6, the two first motors 6 are respectively arranged on two sides of the installation groove 3, output shafts of the two first motors 6 are respectively welded with a first chain wheel 7, the two first chain wheels 7 are respectively engaged with a first chain 8, one side of the fixed block 2 is rotatably provided with a first rotating rod 9, one end of the first rotating rod 9 is welded with a second chain wheel 10, and the two second chain wheels 10 are respectively, two placing cavities 11 are formed in a fixed block 1, the two placing cavities 11 are positioned on two sides of a mounting groove 3, one ends of two first rotating rods 9 respectively extend into the two placing cavities 11 and are welded with first bevel gears 12, first threaded rods 13 are respectively rotatably arranged on the inner walls of the sides, far away from the two placing cavities 11, of the two first threaded rods 13, second bevel gears 14 are respectively welded on the two first threaded rods 13, the two second bevel gears 14 are respectively meshed with the two first bevel gears 12, the ends, close to each other, of the two first threaded rods 13 are respectively in threaded connection with first threaded blocks 15, the two first threaded blocks 15 are respectively slidably arranged in the two placing cavities 11, sliding holes 16 are respectively formed in the inner walls of the two sides of the mounting groove 3, the two sliding holes 16 are respectively communicated with the two placing cavities 11, pressing plates 17 are respectively welded on the sides, close to the two threaded blocks 15, the two pressing plates 17 are respectively matched with the two, two pressing plates 17 are respectively contacted with two sliding columns 5, one side of each of the two sliding columns 5 is provided with a fixed groove 18, fixed columns 19 are movably installed in the two fixed grooves 18, one side of each of the two fixed columns 19 is welded with a same protection plate 20, one side, close to each other, of each of the two fixed columns 19 is provided with a clamping groove 21, clamping blocks 22 are clamped in the two clamping grooves 21, one side, close to each other, of each of the two clamping blocks 22 is welded with a second thread block 23, the inner walls of the two sides of the installation groove 3 are fixedly provided with second motors 24, the output shafts of the two second motors 24 are welded with third conical gears 25, the two third conical gears 25 are respectively engaged with second chains 26, the inner walls of the two sides of the installation groove 3 are both welded with supporting rods 27, one side of each of the two supporting rods 27 is welded with a fixed rod 28, and, the ends of the two second rotating rods 29 close to each other are welded with fourth chain wheels 30, the two fourth chain wheels 30 are respectively in transmission connection with the two third bevel gears 25 through two second chains 26, the inner walls of the two sides of the mounting groove 3 are respectively provided with rotating holes 31, the two rotating holes 31 are respectively communicated with the two fixing grooves 18, the ends of the two second rotating rods 29 far away from each other extend into the two rotating holes 31 and are respectively in threaded connection with the two second thread blocks 23, through the matching of the sliding column 5, the first motor 6, the first chain wheel 7, the first chain 8, the first rotating rod 9, the second chain wheel 10, the placing cavity 11, the first bevel gear 12, the first threaded rod 13, the second bevel gear 14, the first thread block 15, the sliding hole 16 and the pressing plate 17, the output shaft of the first motor 6 drives the first chain wheel 7 to rotate, the first chain wheel 7 drives the first chain wheel 8 to move, the first chain 8 moves to drive the second chain wheel 10 to rotate, the second chain wheel 10 rotates to drive the first rotating rod 9 to rotate, the first rotating rod 9 rotates to drive the first bevel gear 12 to rotate, the first bevel gear 12 rotates to drive the second bevel gear 14 to rotate, the second bevel gear 14 rotates to drive the first threaded rod 13 to rotate, the first threaded rod 13 rotates to drive the first threaded block 15 to move, the first threaded block 15 drives the pressing plate 17 to move, and the pressing plate 17 drives the sliding column 5 to move; through the matching of the clamping groove 21, the clamping block 22, the second thread block 23, the second motor 24, the third bevel gear 25, the second chain 26, the supporting rod 27, the fixing rod 28, the second rotating rod 29 and the fourth chain wheel 30, the output shaft of the second motor 24 drives the third bevel gear 25 to rotate, the third bevel gear 25 rotates to drive the second chain 26 to move, the second chain 26 moves to drive the fourth chain wheel 30 to rotate, the fourth chain wheel 20 rotates to drive the second rotating rod 29 to rotate, the second rotating rod 29 rotates to drive the second thread block 23 to move, and the second thread block 23 moves to drive the clamping block 22 to move into the clamping groove 21; the fixing device is convenient for fixing the velometer 4, is convenient for protecting the velometer 4, and has simple structure and convenient use.
in this embodiment, two rotating holes are formed on one side of the fixed block 2, first bearings are fixedly mounted in the two rotating holes, the two first bearings are respectively sleeved on the two first rotating rods 9, rotating grooves are respectively formed on the inner walls of the sides of the two placing cavities 11 far away from each other, second bearings are respectively fixedly mounted in the two rotating grooves, the two second bearings are respectively sleeved on the two first threaded rods 13, first sliding rails are welded on the inner walls of the sides of the two placing cavities 11 near the first motor 6, first sliding blocks are welded on the inner walls of the sides of the two first threaded blocks 15 near the first motor 6, the two first sliding blocks are respectively slidably mounted on the two first sliding rails, first threaded holes are respectively formed on the sides of the two first threaded blocks 15 far away from each other, first internal threads are respectively arranged in the two first threaded holes, and first external threads are respectively arranged on the two first threaded rods 13, the first internal thread is matched with the first external thread, one side of each of the two second thread blocks 23 close to each other is provided with a second threaded hole, the second threaded holes are internally provided with second internal threads, one end of each of the two second threaded rods 29 far from each other is provided with a second external thread, the second internal threads are matched with the second external threads, the two rotating holes 31 are internally provided with third bearings, the two third bearings are respectively sleeved on the two second threaded rods 29, the inner walls of the two rotating holes 31 are respectively welded with second sliding rails, one side of each of the two second thread blocks 23 is welded with a second sliding block, the two second sliding blocks are respectively and slidably mounted on the two second sliding rails, the inner wall of one side of the mounting groove 3 far from the opening of the mounting groove 3 is welded with a third sliding rail, one side of the two sliding columns 5 is welded with a third sliding block, the two third sliding blocks are respectively and slidably mounted on the third sliding rails, and, the fourth bearings are fixedly installed in the two round holes, the two fourth bearings are respectively sleeved on the two second rotating rods 29, through the matching of the sliding column 5, the first motor 6, the first chain wheel 7, the first chain 8, the first rotating rod 9, the second chain wheel 10, the placing cavity 11, the first bevel gear 12, the first threaded rod 13, the second bevel gear 14, the first threaded block 15, the sliding hole 16 and the pressing plate 17, the output shaft of the first motor 6 drives the first chain wheel 7 to rotate, the first chain wheel 7 rotates to drive the first chain 8 to move, the first chain 8 moves to drive the second chain wheel 10 to rotate, the second chain wheel 10 rotates to drive the first rotating rod 9 to rotate, the first rotating rod 9 rotates to drive the first bevel gear 12 to rotate, the first bevel gear 12 rotates to drive the threaded rod 14 to rotate, the second bevel gear 14 rotates to drive the first tapered gear 13 to rotate, the first threaded rod 13 rotates to drive the first threaded block 15 to move, the first thread block 15 drives the pressing plate 17 to move, and the pressing plate 17 drives the sliding column 5 to move; through the matching of the clamping groove 21, the clamping block 22, the second thread block 23, the second motor 24, the third bevel gear 25, the second chain 26, the supporting rod 27, the fixing rod 28, the second rotating rod 29 and the fourth chain wheel 30, the output shaft of the second motor 24 drives the third bevel gear 25 to rotate, the third bevel gear 25 rotates to drive the second chain 26 to move, the second chain 26 moves to drive the fourth chain wheel 30 to rotate, the fourth chain wheel 20 rotates to drive the second rotating rod 29 to rotate, the second rotating rod 29 rotates to drive the second thread block 23 to move, and the second thread block 23 moves to drive the clamping block 22 to move into the clamping groove 21; the fixing device is convenient for fixing the velometer 4, is convenient for protecting the velometer 4, and has simple structure and convenient use.
The working principle is as follows: firstly, a velometer 4 is placed in a mounting groove 3, then a first motor 6 is started, an output shaft of the first motor 6 drives a first chain wheel 7 to rotate, the first chain wheel 7 rotates to drive a first chain 8 to move, the first chain 8 moves to drive a second chain wheel 10 to rotate, the second chain wheel 10 rotates to drive a first rotating rod 9 to rotate, the first rotating rod 9 rotates to drive a first bevel gear 12 to rotate, the first bevel gear 12 rotates to drive a second bevel gear 14 to rotate, the second bevel gear 14 rotates to drive a first threaded rod 13 to rotate, the first threaded rod 13 rotates to drive a first threaded block 15 to move, the first threaded block 15 drives a pressing plate 17 to move, the pressing plate 17 drives sliding columns 5 to move, the velometer 4 is fixed in the mounting groove 3 by the two sliding columns 5, then a second motor 24 is started, an output shaft of the second motor 24 drives a third bevel gear 25 to rotate, the third bevel gear 25 rotates to drive a second chain 26 to move, the second chain 26 moves and drives the fourth chain wheel 30 to rotate, the fourth chain wheel 30 rotates and drives the second rotating rod 29 to rotate, the second rotating rod 29 rotates and drives the second thread block 23 to move, the second thread block 23 moves and drives the clamping block 22 to move to the clamping groove 21, the protection plate 20 is fixed, the speed measuring device 4 is convenient to fix, and the speed measuring device 4 is convenient to protect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
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CN201810345095.9A CN108527006B (en) | 2018-04-17 | 2018-04-17 | Digital display speed measuring mechanism for main shaft of milling and drilling machine |
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CN201810345095.9A CN108527006B (en) | 2018-04-17 | 2018-04-17 | Digital display speed measuring mechanism for main shaft of milling and drilling machine |
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CN108527006A CN108527006A (en) | 2018-09-14 |
CN108527006B true CN108527006B (en) | 2019-12-10 |
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CN107378642A (en) * | 2017-08-11 | 2017-11-24 | 安徽池州伟舜机电有限公司 | A kind of drilling and milling machine main shaft digital display velocity measurement mechanisms |
CN207195299U (en) * | 2017-08-31 | 2018-04-06 | 合肥雷光动力科技有限公司 | A kind of easy-to-mount compressor impeller |
CN207233500U (en) * | 2017-07-20 | 2018-04-13 | 李国女 | A kind of easy-to-dismount transformer |
Family Cites Families (1)
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DE102010009663A1 (en) * | 2010-02-27 | 2011-09-01 | Ott-Jakob Spanntechnik Gmbh | Device for monitoring work spindle in machine tool, has radar system connected with processing device, where measure for deviation of spindle and ball bearings of spindle in specified state is determined based on received reflected signal |
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2018
- 2018-04-17 CN CN201810345095.9A patent/CN108527006B/en active IP Right Grant
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN200982868Y (en) * | 2006-11-20 | 2007-11-28 | 美的集团有限公司 | A sensor protection device |
CN205908871U (en) * | 2016-08-02 | 2017-01-25 | 吉林工程技术师范学院 | A pipeline fixing device for electromechanical device |
CN206065973U (en) * | 2016-08-30 | 2017-04-05 | 上海昌强重工机械有限公司 | A kind of clematis stem processing tool |
CN207233500U (en) * | 2017-07-20 | 2018-04-13 | 李国女 | A kind of easy-to-dismount transformer |
CN107378642A (en) * | 2017-08-11 | 2017-11-24 | 安徽池州伟舜机电有限公司 | A kind of drilling and milling machine main shaft digital display velocity measurement mechanisms |
CN207195299U (en) * | 2017-08-31 | 2018-04-06 | 合肥雷光动力科技有限公司 | A kind of easy-to-mount compressor impeller |
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Effective date of registration: 20191115 Address after: 215000 Yaobang Road, Lingfeng village, Beiqiao street, Xiangcheng District, Suzhou City, Jiangsu Province Applicant after: Suzhou ruiyiyang Valve Technology Co., Ltd Address before: 511450 Building B, Wanda Plaza, Nansha District, Guangzhou City, Guangdong Province, 1901 Applicant before: Luo Houzhen |
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