CN108168399B - Hole diameter and hole position measurer - Google Patents
Hole diameter and hole position measurer Download PDFInfo
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- CN108168399B CN108168399B CN201810230026.3A CN201810230026A CN108168399B CN 108168399 B CN108168399 B CN 108168399B CN 201810230026 A CN201810230026 A CN 201810230026A CN 108168399 B CN108168399 B CN 108168399B
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- hole
- threaded rod
- lifting threaded
- ruler
- scale
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The invention discloses a hole diameter and hole position measurer, which comprises a scale ruler, a laser ray instrument, a rotary laser graticule instrument, a frame body, a lifting threaded rod and three supporting claws supported on the inner wall of a measured hole, wherein the laser ray instrument is arranged at the end head of one end of the scale ruler, a ruler sleeve is sleeved on the scale ruler, the rotary laser graticule instrument is positioned below the scale ruler, the frame body comprises a top plate connected with the rotary laser graticule instrument, a base with a third through hole in the center, two upright posts and two baffle plates, a bidirectional pointer and two first locking nuts are sleeved on the lifting threaded rod, the bidirectional pointer is positioned between the two first locking nuts, the lifting threaded rod is positioned between the two upright posts and penetrates through the baffle plates, the distance adjusting nuts, the baffle plates and the base positioned above the lifting threaded rod from top to bottom, and the three supporting. The invention can measure the aperture sizes and the hole center positions of different sizes, has wide application range, saves time and labor and simultaneously improves the measurement accuracy.
Description
Technical Field
The invention relates to the technical field of measuring instruments, in particular to an aperture and hole site measurer which is convenient to operate and accurate in measurement.
Background
In the machine manufacturing industry, measuring the hole diameter and the hole center position on a workpiece is an important processing procedure. At present, measuring tools such as a tapered bore plug gauge, a T-shaped plug gauge or a vernier caliper are used in the market for measuring the bore diameter, but the measuring tools are basically single for measuring the bore diameter, other measuring tools are needed for measuring the central position of the bore, and the measurement of the plurality of times can bring adverse effects to the manufacturing precision of workpieces.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problems of the prior art in the background art, an improved hole diameter and hole position measuring device is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a hole diameter and hole position measurer comprises a graduated ruler, a laser ray instrument, a rotary laser marking instrument, a frame body, a lifting threaded rod and three supporting claws supported on the inner wall of a measured hole;
the laser ray instrument is arranged at one end of the scale ruler, the scale ruler is sleeved with a ruler sleeve, a window is formed in the middle of the ruler sleeve, a pointer pointing to the scale of the scale ruler is arranged on the bottom edge of the window, a vertical plug board is arranged at the bottom of the ruler sleeve, and a first through hole is formed in the plug board;
the rotary laser striping machine is positioned below the graduated ruler, the mounting plate with a groove is mounted at the top of the rotary laser striping machine, a connecting hole corresponding to the first through hole is formed in the mounting plate, the inserting plate is inserted into the groove of the mounting plate, and the rotary laser striping machine is movably connected with the ruler sleeve through the through hole and the inserting pin in the connecting hole;
the frame body comprises a top plate connected with the rotary laser graticule instrument, a base with a third through hole in the center position, two upright posts and two baffles, wherein one end of each upright post is connected with the top plate, the other end of each upright post is connected with the base, the center parts of the two baffles are respectively provided with a round through hole, the two baffles are sleeved in the middle positions of the two upright posts and are arranged up and down, a distance adjusting nut is arranged between the two baffles, the center position of the distance adjusting nut is provided with a second through hole, the two baffles are bounded by the baffle positioned at the lower position, and scales are carved on the outer side edge of the lower half part of each upright post;
the bidirectional pointer is positioned between the two first locking nuts, the lower section of the lifting threaded rod is a polished rod, the upper section of the lifting threaded rod is provided with threads, the bidirectional pointer is positioned at the joint of the threads of the lifting threaded rod and the polished rod and is fixed through the two first locking nuts, the bidirectional pointer is positioned between the two first locking nuts, the lifting threaded rod is positioned between the two upright rods and sequentially penetrates through the baffle positioned above, the distance adjusting nut, the baffle positioned below and the base from top to bottom, and the bidirectional pointer points to scales on the two upright rods;
the three supporting claws are uniformly arranged at the bottom of the base, the three supporting claws are respectively provided with a connecting plate group, and the other ends of the connecting plate groups are movably connected with the bottom end of the lifting threaded rod polish rod.
The aperture hole site caliber still include second lock nut, scale ruler top open and to have first screw hole, the middle part at the top of chi cover open and to have the second screw hole that uses with first screw hole cooperation, scale ruler and chi cover insert first screw hole and second screw hole through second lock nut and be connected.
The outer side of the polished rod part of the lifting threaded rod is provided with an anti-guide sliding pin which is positioned at the upper end part of the polished rod of the lifting threaded rod.
The bottom of lifting threaded rod be provided with the otic placode that three outside stretches out, the otic placode on open and to have first connecting hole, connecting plate group constitute by two connecting plates, the both ends of connecting plate respectively open and to have a second connecting hole, the one end of two connecting plates and the middle part swing joint who supports the claw, the other end joint otic placode is connected through inserting the pin at first connecting hole and second connecting hole.
The middle position of the support claw is provided with a hole, and the second connecting holes at one end of the two connecting plates correspond to the holes of the support claw and are inserted with pins to movably connect the two connecting plates with the support claw.
The scale marking is by formulaThe calculation is carried out, the three supporting claws are uniformly distributed on the periphery of the lifting threaded rod by taking the lifting threaded rod as the center, H is the horizontal distance between the upper end point of each supporting claw and the center of the lifting threaded rod, L is the length of each supporting claw, theta is the opening angle of each supporting claw, H, L is a positive rational number, and theta is a positive integer.
The invention has the advantages of simple structure, convenient operation, wide application range, time and labor saving and improvement of the measurement accuracy, and can measure the aperture sizes and the hole center positions of different sizes.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a state diagram of the present invention when closed;
FIG. 3 is a schematic view of the construction of the lifting threaded rod of the present invention;
FIG. 4 is a schematic structural view of a frame body of the present invention;
FIG. 5 is a schematic structural view of the blade case of the present invention;
FIG. 6 is a schematic structural view of a rotary laser striping machine of the present invention;
FIG. 7 is a schematic structural view of a support jaw and a connecting plate of the present invention;
FIG. 8 is a schematic view of a portion of the enlarged structure of A in FIG. 1;
fig. 9 is a schematic structural view of the scale marks on the vertical rod of the computer frame.
In the figure: 1. scale ruler, 2, laser ray apparatus, 3, rotatory laser graticule appearance, 31, mounting panel, 311, recess, 4, support body, 41, roof, 42, base, 43, pole setting, 431, scale, 44, baffle, 5, lifting threaded rod, 51, prevent that the rotation guides sliding pin, 52, otic placode, 521, first connecting hole, 53, polished rod, 54, screw thread, 6, support claw, 7, chi cover, 71, pointer, 72, plugboard, 8, roll adjustment nut, 9, two-way pointer, 10, first lock nut, 11, connection panel group, 111, connecting plate, 12, second lock nut.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
The hole diameter and hole position measurer as shown in fig. 1-9 comprises a graduated ruler 1, a laser ray instrument 2, a rotary laser marking instrument 3, a frame body 4, a lifting threaded rod 5 and three supporting claws 6 supported on the inner wall of a measured hole.
The laser ray instrument 2 is arranged at one end of the scale ruler 1, the scale ruler 1 is sleeved with a ruler sleeve 7, a window is formed in the middle of the ruler sleeve 7, a pointer 71 pointing to the scale of the scale ruler 1 is arranged on the bottom edge of the window, a vertical plug board 72 is arranged at the bottom of the ruler sleeve 7, and a first through hole is formed in the plug board 72.
The rotary laser marking instrument 3 is located below the scale ruler 1, the mounting plate 31 with the groove 311 is mounted at the top of the rotary laser marking instrument 3, the mounting plate 31 is provided with a connecting hole corresponding to the first through hole, the plug board 72 is inserted into the groove 311 of the mounting plate 31, and the rotary laser marking instrument 3 is movably connected with the ruler sleeve 7 through the through hole and the pin inserted into the connecting hole.
The support body 4 is including the roof 41 of connecting rotatory laser striping machine 3, the central point puts the base 42 that opens the third through-hole, two pole settings 43 and two baffles 44, roof 41 is connected to the one end of two pole settings 43, base 42 is connected to its other end, the central point of two baffles 44 respectively opens a round through-hole, two baffles 44 suit are arranged from top to bottom at the intermediate position of two pole settings 43, be equipped with roll adjustment nut 8 between two baffles 44, the central point of roll adjustment nut 8 puts and opens the second through-hole, use the baffle 44 that is located the below position to be bound in two baffles 44, be carved with scale 431 on the outside limit of the lower half of pole setting 43.
The cover is equipped with two-way pointer 9 and two first lock nut 10 on the lifting threaded rod 5, two-way pointer 9 is located between two first lock nut 10, lifting threaded rod 5's hypomere is polished rod 53, lifting threaded rod 5's upper segment is equipped with screw thread 54, two-way pointer 9 is located lifting threaded rod 5's screw thread 54 and polished rod 53's junction and makes two-way pointer 9 fixed through two first lock nut 10, two-way pointer 9 is located between two first lock nut 10, lifting threaded rod 5 is located between two pole settings 43, from top to bottom run through the baffle 44 that is located the top in proper order, pitch nut 8, baffle 44 and the base 42 that are located the below, scale 431 on two pole settings 43 of two-way pointer 9 pointing.
The three supporting claws 6 are uniformly arranged at the bottom of the base 42, the three supporting claws 6 are respectively provided with a connecting plate group 11, and the other end of the connecting plate group 11 is movably connected with the bottom end of a polished rod 53 of the lifting threaded rod 5.
The aperture hole site caliber also comprises a second locking nut 12, a first threaded hole is formed in the top of the scale ruler 1, a second threaded hole matched with the first threaded hole for use is formed in the middle of the top of the ruler sleeve 7, and the scale ruler 1 and the ruler sleeve 7 are connected by inserting the first threaded hole and the second threaded hole through the second locking nut 12.
The outer side of the polished rod 53 of the lifting threaded rod 5 is provided with an anti-guide sliding pin 51, and the anti-guide sliding pin 51 is positioned at the upper end part of the polished rod 53 of the lifting threaded rod 5.
The bottom end of the lifting threaded rod 5 is provided with three lug plates 52 extending outwards, the lug plates 52 are provided with first connecting holes 521, the connecting plate group 11 is composed of two connecting plates 111, two ends of each connecting plate 111 are provided with second connecting holes, one ends of the two connecting plates 111 are movably connected with the middle part of the support claw 6, and the other ends of the two connecting plates are clamped with the lug plates 52 and connected by inserting pins into the first connecting holes 521 and the second connecting holes.
A hole is formed in the middle of the supporting claw 6, and second connecting holes at one ends of the two connecting plates 111 correspond to the holes of the supporting claw 6 and are inserted with pins so that the two connecting plates 111 are movably connected with the supporting claw 6.
The top of the supporting claw 6 is provided with a round hole, the bottom of the base 42 is provided with three mounting groups, each mounting group consists of two arc-shaped plates, each arc-shaped plate is provided with a mounting hole matched with the round hole, the top of the supporting claw 6 is inserted between the two arc-shaped plates, and then a pin is inserted, so that the supporting claw 6 is movably connected with the base 42.
Before the ruler is used, the ruler sleeve 7 and the rotary laser graticule 3 are installed, the scale ruler 1 is inserted into the ruler sleeve 7, the distance adjusting nut 8 is placed between the two baffle plates 44, the supporting claw 6 is installed on the base 42, the lifting threaded rod 5 is inserted from the base 42 from bottom to top, the threaded part of the lifting threaded rod 5 is located on the baffle plate 44 above, and finally the three supporting claws 6 and the lifting threaded rod 5 are connected with each other, so that the installation is completed.
When the aperture is measured, firstly, the measured workpiece is horizontally placed, then the rotary distance-adjusting nut 8 on the aperture hole site measurer is adjusted, the lifting threaded rod 5 is lifted, so that the three supporting claws 6 are slowly opened, the three contacts at the top of the supporting claws are respectively tightly leaned against the inner wall of the measured round hole, the three points are adjusted to be positioned on the same horizontal plane, and if the three points are not positioned on the same horizontal plane, the rotary laser graticule instrument opened above the supporting claws is adjusted3 can send the alarm sound of dripping, then report to the police and cancel until three contact is located same horizontal plane, aperture size numerical value accessible two-way pointer 9 reads this moment, and the scale 431 mark of the outside limit of the lower half of pole setting 43 on the support body 4 derives the production through mathematical formula and experiment. Scale 431 is marked by formulaThe calculation is carried out, the three supporting claws 6 are uniformly distributed on the periphery of the lifting threaded rod 5 by taking the lifting threaded rod 5 as a center, H is the horizontal distance between the upper end point O of the supporting claw 6 and the center of the lifting threaded rod 5, L is the length of the supporting claw 6, theta is the opening angle of the supporting claw 6, H, L are positive rational numbers, and theta is a positive integer.
B = L is calculated by using the length L of the support claw 6, the vertical distance between the upper end O of the support claw 6 and the lower contact Q thereof, and the horizontal distance B between the upper end O of the support claw 6 and the lower contact Q thereof as a right triangle, and using the opening angle θ of the support claw 6 (i.e., the included angle between the support claw 6 and the center of the lifting threaded rod 5) as a variable referenceWhen the horizontal distance between the upper end point O of the support claw 6 and the center of the lifting threaded rod 5 is H, the radius of the round hole on the driven side is R = H + B = H + LThe diameter of the quilt side round hole isThe horizontal distance between the upper end point O of the supporting claw 6 and the center of the lifting threaded rod 5 is H, and the length L of the supporting claw 6 is known, so that the radius of the round hole to be measured can be determined only by setting the value of theta, the diameter of the round hole to be measured can be determined, and the scale 431 can be marked. The theta is a positive integer, namely the theta is sequentially valued at 1 degree, 2 degrees and 3 degreesThe values of (1) are sequentially madeIs the label for scale 431. During actual measurement, the size of the aperture can be read through the position of the scale 431 pointed by the bidirectional pointer 9, and scientific accuracy is achieved.
When needing measuring hole central point to put, at first open the laser ray appearance 2 of scale ruler 1 one end, the adjustment plane light beam makes light gf and the edge coincidence of being surveyed the work piece, does not report to the police when rotatory laser marking appearance 3, and the scale ruler 1 overturns the horizontality that is scale ruler 1 when the biggest corner, finds measurement zero point c through the flexible volume of adjustment horizontally scale ruler 1 this moment, and the reading of hole central point can be read through pointer 71 on chi cover 7. When the distance from the center of the hole to the edge of the workpiece exceeds the measuring range of the scale ruler 1, an operator can project cross-shaped light beams ab and cd to the surface of the workpiece to be measured by using the rotary laser striping machine 3 as hole center reference lines, the cross-shaped light beams ab and cd are directly projected onto a tested flat plate, and then the operator uses other large-range rulers to perform secondary measurement.
The whole set of measurer is simple in structure, convenient to operate, low in manufacturing cost, large in aperture adjusting range and capable of rotating hole center datum lines in multiple directions so as to meet measuring requirements in different directions, and is suitable for wide application in the machining industry.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. An aperture hole site caliber, characterized by: comprises a scale ruler (1), a laser ray instrument (2), a rotary laser marking instrument (3), a frame body (4), a lifting threaded rod (5) and three supporting claws (6) supported on the inner wall of a measured hole;
the laser ray instrument (2) is arranged at one end of the scale ruler (1), a ruler sleeve (7) is sleeved on the scale ruler (1), a window is formed in the middle of the ruler sleeve (7), a pointer (71) pointing to the scale of the scale ruler (1) is arranged on the bottom edge of the window, a vertical plug-in board (72) is arranged at the bottom of the ruler sleeve (7), and a first through hole is formed in the plug-in board (72);
the rotary laser striping machine (3) is positioned below the scale ruler (1), the mounting plate (31) with a groove (311) is mounted at the top of the rotary laser striping machine (3), a connecting hole corresponding to the first through hole is formed in the mounting plate (31), the inserting plate (72) is inserted into the groove (311) of the mounting plate (31), and the rotary laser striping machine (3) is movably connected with the ruler sleeve (7) through the through hole and the connecting hole by inserting a pin into the through hole and the connecting hole;
the frame body (4) comprises a top plate (41) connected with the rotary laser striping machine (3), a base (42) with a third through hole in the center, two upright rods (43) and two baffle plates (44), one end of each upright rod (43) is connected with the top plate (41), the other end of each upright rod is connected with the base (42), the center parts of the two baffle plates (44) are respectively provided with a round through hole, the two baffle plates (44) are sleeved at the middle positions of the two upright rods (43) and are arranged up and down, a distance adjusting nut (8) is arranged between the two baffle plates (44), the center position of the distance adjusting nut (8) is provided with a second through hole, the two baffle plates (44) are bounded by the baffle plate (44) positioned at the lower position, and scales (431) are carved on the outer side of the lower half part of each upright rod (43);
the lifting threaded rod (5) is sleeved with a bidirectional pointer (9) and two first locking nuts (10), the bidirectional pointer (9) is positioned between the two first locking nuts (10), the lower section of the lifting threaded rod (5) is a polished rod (53), the upper section of the lifting threaded rod (5) is provided with threads (54), the bidirectional pointer (9) is positioned at the joint of the thread (54) of the lifting threaded rod (5) and the polished rod (53) and is fixed by two first locking nuts (10), the bidirectional pointer (9) is positioned between the two first locking nuts (10), the lifting threaded rod (5) is positioned between the two upright rods (43) and sequentially penetrates through the baffle (44) positioned above, the distance adjusting nut (8), the baffle (44) positioned below and the base (42) from top to bottom, and the bidirectional pointer (9) points to the scales (431) on the two upright rods (43);
the three supporting claws (6) are uniformly arranged at the bottom of the base (42), the three supporting claws (6) are respectively provided with a connecting plate group (11), and the other end of each connecting plate group (11) is movably connected with the bottom end of a polished rod (53) of the lifting threaded rod (5).
2. An aperture hole site measurer as claimed in claim 1, wherein: the aperture hole site caliber still include second lock nut (12), scale ruler (1) top open and to have first screw hole, the middle part at the top of chi cover (7) open and to have the second screw hole that uses with first screw hole cooperation, scale ruler (1) and chi cover (7) insert first screw hole and second screw hole through second lock nut (12) and be connected.
3. An aperture hole site measurer as claimed in claim 1, wherein: the anti-guide sliding pin (51) is arranged on the outer side of the polished rod (53) of the lifting threaded rod (5), and the anti-guide sliding pin (51) is located at the upper end of the polished rod (53) of the lifting threaded rod (5).
4. An aperture hole site measurer as claimed in claim 1, wherein: the bottom of lifting threaded rod (5) be provided with three otic placode (52) that outwards stretch out, otic placode (52) on open and to have first connecting hole (521), connecting plate group (11) constitute by two connecting plates (111), the both ends of connecting plate (111) respectively open and to have a second connecting hole, the one end of two connecting plates (111) and the middle part swing joint of supporting claw (6), other end joint otic placode (52) and through inserting the pin in first connecting hole (521) and second connecting hole and be connected.
5. An aperture hole site measurer as claimed in claim 4, wherein: the middle position of the support claw (6) is provided with a hole, and the second connecting holes at one end of the two connecting plates (111) correspond to the holes of the support claw (6) and are inserted with pins to movably connect the two connecting plates (111) with the support claw (6).
6. An aperture hole site measurer as claimed in any one of claims 1 to 5, wherein: the scale (431) is marked by a formulaThe calculation is carried out, the three supporting claws (6) use the lifting threaded rod (5) as the center and are uniformly distributed on the periphery of the lifting threaded rod (5), H is the horizontal distance between the upper end point of the supporting claw (6) and the center of the lifting threaded rod (5), L is the length of the supporting claw (6), theta is the opening angle of the supporting claw (6), H, L is a positive rational number, and theta is a positive integer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810230026.3A CN108168399B (en) | 2018-03-20 | 2018-03-20 | Hole diameter and hole position measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810230026.3A CN108168399B (en) | 2018-03-20 | 2018-03-20 | Hole diameter and hole position measurer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108168399A CN108168399A (en) | 2018-06-15 |
| CN108168399B true CN108168399B (en) | 2019-12-27 |
Family
ID=62511227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810230026.3A Active CN108168399B (en) | 2018-03-20 | 2018-03-20 | Hole diameter and hole position measurer |
Country Status (1)
| Country | Link |
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| CN (1) | CN108168399B (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59148801A (en) * | 1983-02-15 | 1984-08-25 | Ashida Kikai Kogyosho:Goushi | Device for measuring position of hole |
| JPS6073302A (en) * | 1983-09-30 | 1985-04-25 | Osaka Sosenjo:Kk | Measuring unit of shape of conduit-installation in 3-dimensional space |
| CN2103118U (en) * | 1990-11-28 | 1992-04-29 | 陈满成 | Verify apparatus under-reaming bottom pile |
| JPH09210667A (en) * | 1996-02-06 | 1997-08-12 | Kensuke Fujimura | Bore diameter measuring apparatus |
| CN201259412Y (en) * | 2008-08-29 | 2009-06-17 | 河北省第四建筑工程公司 | Self-divergence type pile diameter detection device |
| CN201285270Y (en) * | 2008-10-29 | 2009-08-05 | 奇瑞汽车股份有限公司 | Measuring tool |
| CN201440063U (en) * | 2009-08-13 | 2010-04-21 | 中冶建筑研究总院有限公司 | Aperture measuring device for anchor hole and pile hole |
| CN201653328U (en) * | 2010-04-15 | 2010-11-24 | 上海宝钢设备检修有限公司 | Easy and movable measuring tool for large-size inner diameter of workpiece |
| CN202788805U (en) * | 2012-09-19 | 2013-03-13 | 苏州建鑫建设集团有限公司 | Underground deep hole detection device |
| CN107677184B (en) * | 2017-09-20 | 2020-02-14 | 江苏理工学院 | Part surface hole position size detection tool |
| CN207922993U (en) * | 2018-03-20 | 2018-09-28 | 常州信息职业技术学院 | A kind of pore position measuring appliance |
-
2018
- 2018-03-20 CN CN201810230026.3A patent/CN108168399B/en active Active
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| CN108168399A (en) | 2018-06-15 |
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Effective date of registration: 20210531 Address after: 213000 No.20, private 2nd Road, Airport Industrial Park, Luoxi Town, Xinbei District, Changzhou City, Jiangsu Province Patentee after: Changzhou Walker Electric Co.,Ltd. Address before: 213164 No. 2 Mingxin Middle Road, Wujin University Town, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU College OF INFORMATION TECHNOLOGY |