CN218724042U - Inner hole detection device - Google Patents
Inner hole detection device Download PDFInfo
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- CN218724042U CN218724042U CN202223057202.9U CN202223057202U CN218724042U CN 218724042 U CN218724042 U CN 218724042U CN 202223057202 U CN202223057202 U CN 202223057202U CN 218724042 U CN218724042 U CN 218724042U
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- inner hole
- swing
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- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 238000006073 displacement reaction Methods 0.000 claims abstract description 29
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The utility model discloses an inner hole detection device, which comprises a measuring head, a position compensation device and a linear displacement sensor; the measuring head measures the distance value of the upper cone and the lower cone through the linear displacement sensor to calculate the diameter of a measured hole, the upper cone and the lower cone move up and down simultaneously under the drive of the linear displacement sensor to be away from each other in the measuring process, the conical surfaces of the upper cone and the lower cone push the transmission ball to move outwards in the measuring process, meanwhile, the upper transmission ball and the lower transmission ball in the same direction push a group of cylindrical measuring columns to move outwards, when the group of cylindrical measuring columns contact the inner hole wall of a product to be measured, the whole device stops moving, and at the moment, the linear displacement sensor measures a distance value; the value measured by the linear displacement sensor is calculated through a conical taper trigonometric function to obtain the value of the maximum inscribed circle of the group of linear displacement sensors; in general: the utility model has the advantages of high measurement accuracy and convenient operation.
Description
Technical Field
The utility model relates to a hole detects technical field, concretely relates to hole detection device.
Background
The inner hole size of the product measured on the automatic electronic inspection tool needs to be fast, the positioning is accurate, and the existing inner hole detection device has the following problems:
1. a position error exists between the measured surface of the product and the measuring head, so that the measuring precision is reduced;
2. different products are unsmooth in operation due to the fact that the products are clamped up and down in the process of measurement due to the difference of the position degrees.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a hole detection device that measurement accuracy is high, convenient operation, concrete technical scheme is:
an inner hole detection device comprises a measuring head, wherein the lower end of the measuring head is connected with a position degree compensation device through a flange, a linear displacement sensor is sleeved in the position degree compensation device, and a measuring rod of the linear displacement sensor is connected with the measuring head;
the measuring head comprises a measuring head main body, an upper cone and a lower cone are arranged in the measuring head main body, a connecting rod of the upper cone penetrates through the lower cone and then is connected with the linear displacement sensor, a group of limiting pins are arranged between the upper cone and the lower cone, and the limiting pins are arranged along the radial direction of the measuring head; a group of long waist-shaped measuring holes are formed in the side wall of the measuring head main body along the axial direction, a cylindrical measuring column is connected in each long waist-shaped measuring hole in a floating mode, transmission balls are arranged between each cylindrical measuring column and the conical surface of the upper cone and between the conical surfaces of the lower cones, one end, extending out of the measuring head main body, of each lower cone is connected with a threaded taper sleeve, the outer side wall of each threaded taper sleeve is connected with a sensor fixing block, and a sealing cover is arranged at the upper end of the measuring head main body;
the position degree compensation device comprises the detection seat and a group of reset devices sleeved in an inner hole of the detection seat, the reset devices are distributed along the axial direction of the inner hole of the detection seat, a floating column is movably inserted in the reset devices, floating devices are arranged on the floating columns, and the floating devices are respectively connected with the floating columns and the detection seat or the reset devices and used for enabling the floating columns to freely move along a horizontal plane and/or swing along an axis; the connecting rod of the upper cone, the connecting end of the lower cone, the threaded taper sleeve, the sensor fixing block and the measuring rod of the linear displacement sensor are all arranged in the inner hole of the floating column in a penetrating mode;
a limiting table is arranged in an inner hole of the floating column, an expansion spring is arranged between the limiting table and the sensor fixing block, and the expansion spring is sleeved on the linear displacement sensor;
wherein the resetting device is used for resetting the floating column to a zero position or an initial position.
Preferably, the reset device comprises a reset ring, the reset ring is sleeved in the detection seat and is positioned at two ends of the detection seat, the reset ring is provided with a group of reset grooves and reset holes, and the reset holes are arranged along the reset ring array and are communicated with the reset grooves; and
the floating column comprises a floating column, a reset tension spring, a reset ring, a reset groove, a reset ring and a floating column, wherein the reset tension spring is movably inserted into the reset groove, two ends of the reset tension spring are connected together, the reset tension spring is movably inserted into the reset hole, the three sections of tension spring sections are not less than inside the reset ring, and the tension spring sections are movably abutted to the outer circular surface of the floating column.
Preferably, the floating device includes: the upper swing ring is provided with an upper swing spherical surface, and the upper swing ring is movably positioned in the inner hole of the detection seat and close to the reset device at the upper end;
the lower swing ring is provided with a lower swing spherical surface, and the lower swing ring is movably positioned in the inner hole of the detection seat and close to the resetting device at the lower end;
the spherical ring is arranged in the inner hole of the detection seat and is positioned between the upper swing ring and the lower swing ring, an upper spherical surface and a lower spherical surface are arranged on the spherical ring, the upper spherical surface movably abuts against the upper swing spherical surface, the lower spherical surface movably abuts against the lower swing spherical surface, and the upper swing spherical surface and the lower swing spherical surface are respectively matched with the upper spherical surface and the lower spherical surface, so that the floating column can swing freely along the axis;
go up the swing ring with lower swing ring still respectively with be located detect the seat hole both ends reset device sliding connection, just go up the swing ring with the diameter of lower swing ring is less than detect the diameter of seat hole, make the unsteady post removes along the horizontal plane wantonly.
Preferably, the upper and lower parts of the transmission ball are 3 respectively and are uniformly distributed at an included angle of 120 degrees.
Preferably, the resetting devices are uniformly arranged along the axis of the inner hole of the detection seat.
Preferably, both ends of the reset ring are provided with arc surfaces, and the arc surfaces are opposite to the floating columns.
Compared with the prior art the utility model discloses following beneficial effect has:
1. the measuring head of the utility model adopts the cylindrical measuring column to contact with the inner hole surface to be measured, and the measuring precision and the stability are higher than two-point measurement and three-point measurement;
2. the position degree compensation device balances the position degree error of the measured surface of the product relative to the measuring head, and improves the measuring precision;
3. the floating column can realize automatic reset through the reset device and the floating device, and the problem of unsmooth operation caused by clamping stagnation of up and down movement of different products during product measurement due to position degree difference is solved; generally, the utility model discloses a resetting means, floating installation realize the unsteady setting of unsteady post, and then realize the unsteady setting of measuring head of being connected with the unsteady post, the convenience has improved the detection precision according to position error automatic adjustment to convenient operation.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
fig. 2 is a perspective view and a sectional view of the present invention;
fig. 3 is a perspective cross-sectional view of a measuring head according to the present invention;
fig. 4 is a perspective view and a sectional view of the position compensation device of the present invention;
reference numerals: 1. the measuring head comprises a measuring head body, 11, a measuring head main body, 12, an upper cone body, 13, a lower cone body, 14, a limiting pin, 15, a long waist-shaped measuring hole, 16, a cylindrical measuring column, 17, a transmission ball, 18, a threaded taper sleeve, 19, a sensor fixing block, 110, a sealing cover, 2, a position degree compensation device, 21, a detection seat, 22, a floating column, 221, a limiting table, 23, a reset device, 231, a reset ring, 2311, a reset groove, 2312, a reset hole, 2313, a reset tension spring, 2314, a tension spring section, 24, a floating device, 241, an upper swing ring, 2411, an upper swing spherical surface, 242, a lower swing ring, 2421, a lower swing spherical surface, 243, a spherical surface ring, 2431, an upper spherical surface, 2432, a lower spherical surface, 3, a linear displacement sensor, 4 and a telescopic spring.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1 and 2, an inner hole detection device comprises a measuring head 1, wherein the lower end of the measuring head 1 is connected with a position degree compensation device 2 through a flange, a linear displacement sensor 3 is sleeved in the position degree compensation device 2, and a measuring rod of the linear displacement sensor 3 is connected with the measuring head 1; the linear displacement sensor 3 is a pull rod type linear displacement sensor, and the measuring head body 11, the detecting seat 21 and the floating column 22 are all cylindrical.
As shown in fig. 3, the measuring head 1 includes a measuring head main body 11, an upper cone 12 and a lower cone 13 are arranged inside the measuring head main body 11, a connecting rod of the upper cone 12 penetrates through the lower cone 13 and then is connected with the linear displacement sensor 3, a set of limit pins 14 are arranged between the upper cone 12 and the lower cone 13, and the limit pins 14 are uniformly distributed along the radial direction of the measuring head 1; a group of long waist-shaped measuring holes 15 are uniformly formed in the side wall of the measuring head main body 11 along the axial direction, cylindrical measuring columns 16 are connected in the long waist-shaped measuring holes 15 in a floating mode, transmission balls 17 are arranged between the cylindrical measuring columns 16 and the conical surfaces of the upper cone 12 and between the conical surfaces of the lower cone 13, the transmission balls 17 are distributed in an up-and-down mode and are distributed uniformly at included angles of 120 degrees, one end, extending out of the measuring head main body 11, of the lower cone 13 is connected with a threaded taper sleeve 18, a sensor fixing block 19 is connected to the outer side wall of the threaded taper sleeve 18, and a sealing cover 110 is arranged at the upper end of the measuring head main body 11;
as shown in fig. 4, the position compensation device 2 includes a detection seat 21, and a set of two reset devices 23 sleeved in the inner hole of the detection seat 21, where the two reset devices 23 are uniformly distributed along the axial direction of the inner hole of the detection seat 21 and are respectively located at the top and the bottom of the inner hole of the detection seat 21. A floating column 22 is movably inserted in the resetting device 23, a floating device 24 is arranged on the floating column 22, and the floating device 24 is respectively connected with the floating column 22 and the detection seat 21 or the resetting device 23 and is used for enabling the floating column 22 to randomly move along a horizontal plane and/or randomly swing along an axis; the connecting rod of the upper cone 12, the connecting end of the lower cone 13, the threaded taper sleeve 18, the sensor fixing block 19 and the measuring rod of the linear displacement sensor 3 are all arranged in an inner hole of the floating column 22 in a penetrating mode; a limiting table 221 is arranged in an inner hole of the floating column 22, an expansion spring 4 is arranged between the limiting table 221 and the sensor fixing block 19, and the expansion spring 4 is sleeved on the linear displacement sensor 3;
wherein the reset device 23 is used to reset the floating column 22 to a zero or initial position.
The reset device 23 comprises a reset ring 231, the reset ring 231 is sleeved in the detection seat 21 and is located at two ends of the detection seat 21, a group of reset grooves 2311 and reset holes 2312 are formed in the reset ring 231, the reset grooves 2311 are located on the outer circular surface of the reset ring 231, the reset holes 2312 are located at the bottom of the reset grooves 2311, and the reset holes 2312 are arranged along the reset ring 231 in an array and are communicated with the reset grooves 2311; and
the reset tension spring 2313 is movably inserted into the reset groove 2311, two ends of the reset tension spring 2313 are connected together, the reset tension spring 2313 is also movably inserted into the reset hole 2312, no less than three tension spring sections 2314 are arranged in the reset ring 231, the tension spring sections 2314 are movably abutted against the outer circular surface of the floating column 22, the tension spring sections 2314 form a reset frame, and the upper and lower two groups of tension spring sections 2314 are in consistent positions, so that the reset frame is consistent up and down, and coaxiality and reliable reset are guaranteed; the floating column 22 is movably inserted into the inner hole of the detection seat 21 and is movably clamped on the tension spring section 2314 of the reset tension spring 2313, and the outer diameter of the floating column 22 is smaller than the inner diameter of the reset ring 231, so that the floating column 22 can move or swing in the inner hole of the detection seat 21.
The floating device 24 includes: the upper swinging ring 241 is provided with an upper swinging spherical surface 2411, and the upper swinging ring 241 is movably positioned in the inner hole of the detection seat 21 and is close to the resetting device 23 at the upper end;
a lower swing ring 242, wherein the lower swing ring 242 is provided with a lower swing spherical surface 2421, and the lower swing ring 242 is movably positioned in the inner hole of the detection seat 21 and is close to the resetting device 23 at the lower end;
the spherical ring 243 is installed in the inner hole of the detection seat 21 and is positioned between the upper swing ring 241 and the lower swing ring 242, the spherical ring 243 is provided with an upper spherical surface 2431 and a lower spherical surface 2432, the upper spherical surface 2431 movably abuts against the upper swing spherical surface 2411, the lower spherical surface 2432 movably abuts against the lower swing spherical surface 2421, and the upper swing spherical surface 2411 and the lower swing spherical surface 2421 are respectively matched with the upper spherical surface 2431 and the lower spherical surface 2432, so that the floating column 22 can swing freely along the axis; the upper spherical surface 2431 and the lower spherical surface 2432 are located on the same spherical surface, and the upper spherical surface 2431 and the lower spherical surface 2432 are respectively matched with the upper swinging spherical surface 2411 and the lower swinging spherical surface 2421 to realize a joint bearing structure, so that the floating column 22 can swing freely.
The upper swing ring 241 and the lower swing ring 242 are also connected with the reset devices 23 at two ends of the inner hole of the detection base 21 in a sliding manner, and the diameters of the upper swing ring 241 and the lower swing ring 242 are smaller than the diameter of the inner hole of the detection base 21, so that the floating column 22 can move freely along the horizontal plane. The upper swing ring 241 and the lower swing ring 242 are respectively in sliding contact with the reset rings 231 at two ends of the inner hole of the detection seat 21 to limit the axial position of the spherical ring 243, so as to prevent the spherical ring 243 from moving up and down, and enable the spherical ring 243 to only swing or rotate.
The floating column 22 can swing under the action of external force and can move along the horizontal plane at any angle.
The both ends of reset ring 231 are equipped with the arc surface, and the arc surface sets up with unsteady post 22 relatively, and the arc surface can prevent to draw and damage unsteady post 22, can increase unsteady post 22's swing angle simultaneously.
The measuring head 1 is fixed on the floating column 22 through a flange, and when measuring, if the measuring head 1 has position deviation relative to the detected surface of a product, the floating column 22 can generate offset load force when the measuring head 1 is contacted with the detected surface, so that the position correcting effect of the measuring head is achieved, and the measuring result is not influenced by position error.
The working principle is as follows:
the measuring head 1 mainly measures the distance value of the upper cone 12 and the lower cone 13 through the linear displacement sensor 3 to calculate the diameter of a measured hole, the upper cone and the lower cone move up and down simultaneously under the drive of the linear displacement sensor and are away from each other in the measuring process, the conical surfaces of the upper cone 12 and the lower cone 13 push the transmission ball 17 to move outwards in the measuring process, meanwhile, the upper transmission ball 17 and the lower transmission ball 17 in the same direction push a group of cylindrical measuring columns 16 to move outwards, when the group of cylindrical measuring columns 16 contact the inner hole wall of a product to be measured, the whole device stops moving, and at the moment, the linear displacement sensor 3 measures a distance value; the value measured by the linear displacement sensor 3 is calculated through a conical taper trigonometric function to obtain the value of the maximum inscribed circle of the group of linear displacement sensors 3; when the product is removed after the measurement is finished, the floating column 22 will automatically return to the initial position under the action of the upper and lower two-position return tension springs 2313 and the extension spring 4.
Has the following beneficial effects:
1. the measuring head 1 of the utility model adopts the cylindrical measuring column 16 to contact with the inner bore surface to be measured, and the measuring precision and the stability are higher than two-point measurement and three-point measurement;
2. the position degree compensation device 2 balances the position degree error of the measured surface of the product relative to the measuring head 1, and improves the measuring precision;
3. the floating column 22 can realize automatic reset through the reset device 23 and the floating device 24, and the problem of unsmooth operation caused by blocking of up-and-down movement of different products during product measurement due to position degree difference is solved; always, the utility model discloses a resetting means 23, floating installation 24 realize the unsteady setting of unsteady post 22, and then realize the unsteady setting of measuring head 1 of being connected with unsteady post 22, the convenience has improved the detection precision according to position error automatic adjustment to convenient operation.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and is not to be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, and these embodiments will fall within the scope of the claims of the present invention.
Claims (6)
1. An inner hole detection device is characterized in that: the device comprises a measuring head (1), wherein the lower end of the measuring head (1) is connected with a position compensation device (2) through a flange, a linear displacement sensor (3) is sleeved in the position compensation device (2), and a measuring rod of the linear displacement sensor (3) is connected with the measuring head (1);
the measuring head (1) comprises a measuring head main body (11), an upper cone (12) and a lower cone (13) are arranged inside the measuring head main body (11), a connecting rod of the upper cone (12) penetrates through the lower cone (13) and then is connected with the linear displacement sensor (3), a group of limiting pins (14) are arranged between the upper cone (12) and the lower cone (13), and the limiting pins (14) are arranged along the radial direction of the measuring head (1); a group of long waist-shaped measuring holes (15) are formed in the side wall of the measuring head main body (11) along the axial direction, a cylindrical measuring column (16) is connected in the long waist-shaped measuring holes (15) in a floating mode, a group of transmission balls (17) are arranged between the cylindrical measuring column (16) and the conical surface of the upper cone (12) and between the conical surfaces of the lower cone (13), one end, extending out of the measuring head main body (11), of the lower cone (13) is connected with a threaded taper sleeve (18), a sensor fixing block (19) is connected to the outer side wall of the threaded taper sleeve (18), and a sealing cover (110) is arranged at the upper end of the measuring head main body (11);
the position degree compensation device (2) comprises a detection seat (21) and a group of reset devices (23) sleeved in an inner hole of the detection seat (21), the reset devices (23) are axially distributed along the inner hole of the detection seat (21), a floating column (22) is movably inserted in the reset devices (23), a floating device (24) is arranged on the floating column (22), and the floating device (24) is respectively connected with the floating column (22) and the detection seat (21) or the reset devices (23) and is used for enabling the floating column (22) to randomly move along a horizontal plane and/or randomly swing along an axis; the connecting rod of the upper cone (12), the connecting end of the lower cone (13), the threaded taper sleeve (18), the sensor fixing block (19) and the measuring rod of the linear displacement sensor (3) are all arranged in an inner hole of the floating column (22) in a penetrating mode;
a limiting table (221) is arranged in an inner hole of the floating column (22), an expansion spring (4) is arranged between the limiting table (221) and the sensor fixing block (19), and the expansion spring (4) is sleeved on the linear displacement sensor (3);
wherein the resetting device (23) is used for resetting the floating column (22) to a zero position or an initial position.
2. The inner hole detection device according to claim 1, wherein the reset device (23) comprises a reset ring (231), the reset ring (231) is sleeved in the detection seat (21) and is located at two ends of the detection seat (21), a set of reset grooves (2311) and reset holes (2312) are arranged on the reset ring (231), and the reset holes (2312) are arranged along the reset ring (231) in an array and are communicated with the reset grooves (2311); and
reset extension spring (2313), reset extension spring (2313) activity is inserted in reset groove (2311), the both ends of reset extension spring (2313) link together, reset extension spring (2313) still activity is inserted in reset hole (2312), the extension spring section (2314) of three-section are no less than in the inside of reset ring (231), extension spring section (2314) activity is supported on the excircle face of unsteady post (22).
3. An inner bore detection device according to claim 1, wherein the float means (24) comprises:
the upper swing ring (241) is provided with an upper swing spherical surface (2411), and the upper swing ring (241) is movably positioned in the inner hole of the detection seat (21) and close to the reset device (23) at the upper end;
the lower swing ring (242) is provided with a lower swing spherical surface (2421), and the lower swing ring (242) is movably positioned in the inner hole of the detection seat (21) and close to the resetting device (23) at the lower end;
the spherical ring (243) is installed in an inner hole of the detection seat (21) and is positioned between the upper swing ring (241) and the lower swing ring (242), an upper spherical surface (2431) and a lower spherical surface (2432) are arranged on the spherical ring (243), the upper spherical surface (2431) movably abuts against the upper swing spherical surface (2411), the lower spherical surface (2432) movably abuts against the lower swing spherical surface (2421), and the upper swing spherical surface (2411) and the lower swing spherical surface (2421) are respectively matched with the upper spherical surface (2431) and the lower spherical surface (2432) so that the floating column (22) can swing freely along an axis;
go up swing ring (241) with lower swing ring (242) still respectively with be located detect seat (21) hole both ends resetting means (23) sliding connection, just go up swing ring (241) with the diameter of lower swing ring (242) is less than detect the diameter of seat (21) hole, make unsteady post (22) move wantonly along the horizontal plane.
4. An inner bore detection device according to claim 1, wherein the number of the transmission balls (17) is 3 respectively, and the transmission balls are uniformly distributed at an included angle of 120 degrees.
5. A bore detection device according to claim 1, characterized in that the resetting means (23) are arranged uniformly along the axis of the bore of the detection seat (21).
6. An inner hole detection device as claimed in claim 2, wherein the two ends of the reset ring (231) are provided with arc surfaces, and the arc surfaces are opposite to the floating columns (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223057202.9U CN218724042U (en) | 2022-11-17 | 2022-11-17 | Inner hole detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223057202.9U CN218724042U (en) | 2022-11-17 | 2022-11-17 | Inner hole detection device |
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| Publication Number | Publication Date |
|---|---|
| CN218724042U true CN218724042U (en) | 2023-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223057202.9U Active CN218724042U (en) | 2022-11-17 | 2022-11-17 | Inner hole detection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN218724042U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117606325A (en) * | 2024-01-22 | 2024-02-27 | 无锡恩梯量仪科技有限公司 | Inner hole precision detection device and detection method |
-
2022
- 2022-11-17 CN CN202223057202.9U patent/CN218724042U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117606325A (en) * | 2024-01-22 | 2024-02-27 | 无锡恩梯量仪科技有限公司 | Inner hole precision detection device and detection method |
| CN117606325B (en) * | 2024-01-22 | 2024-05-03 | 无锡恩梯量仪科技有限公司 | Inner hole precision detection device and detection method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231226 Address after: 315000 Qian Xu village, Yunlong Town, Yinzhou District, Ningbo, Zhejiang Patentee after: Ningbo Yihang Electric Co.,Ltd. Address before: No. 56-28, Ningchuanxi Road, Daqi Street, Beilun District, Ningbo City, Zhejiang Province 315000 Patentee before: Zhejiang Shaoxu Precision Machinery Co.,Ltd. |
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| TR01 | Transfer of patent right |