CN210375489U - High-strength bolt axial force and torque composite detection device - Google Patents
High-strength bolt axial force and torque composite detection device Download PDFInfo
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- CN210375489U CN210375489U CN201921830473.9U CN201921830473U CN210375489U CN 210375489 U CN210375489 U CN 210375489U CN 201921830473 U CN201921830473 U CN 201921830473U CN 210375489 U CN210375489 U CN 210375489U
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- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title claims abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010008 shearing Methods 0.000 description 13
- 238000012360 testing method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Abstract
The utility model relates to a high-strength bolt axial force and torque composite detection device, which comprises a frame, wherein a slide way is arranged on the frame, a first bearing vehicle and a second bearing vehicle are arranged in the slide way in a sliding fit manner, a first tension plate is arranged on the first bearing vehicle, and a second tension plate is arranged on the second bearing vehicle; threaded holes are formed in the first tension plate and the second tension plate; the first bearing vehicle and the second bearing vehicle are connected with a tension and pressure detection device; the first bearing vehicle is provided with a first fixing plate, and the second bearing vehicle is provided with a second fixing plate corresponding to the first fixing plate; a torsion gear is rotatably supported on the first fixing plate, and a hexagonal lower counter bore is formed in the torsion gear; two cylinders are fixed on the second fixing plate, the two cylinders are arranged oppositely, and the end part of a cylinder piston rod is fixed with a clamping piece. The utility model discloses have and to carry out the effect that axle power and moment of torsion complex detected to the bolt that does not weld.
Description
Technical Field
The utility model belongs to the technical field of the technique that bolt strength detected and specifically relates to a compound detection device of high-strength bolt axial force moment of torsion is related to.
Background
The high-strength bolt can bear larger load than a common bolt with the same specification, and is widely applied to various devices in the fields of machinery, buildings and the like. In order to ensure that the bolt maintains enough connection strength between the corresponding connection parts, a series of detection work needs to be performed before the bolt leaves a factory.
At present, patent document with publication number CN105806538B discloses a projection welding bolt torque detection device, which includes a clamp connected with one end of the projection welding bolt with a thread, a sleeve sleeved on the clamp, a conical block sleeved on the sleeve, a distance measuring wrench matched with the conical block, a locking nut arranged on the sleeve and a spring arranged on the sleeve and having two ends respectively connected with the conical block and the locking nut; the device is capable of detecting a projection welded bolt that has been welded.
The projection welding bolt torque detection device can only detect the torque of the projection welding bolt which is already welded, and cannot detect the bolt which is not welded, so that the practicability is low.
SUMMERY OF THE UTILITY MODEL
To the not enough of existence among the above-mentioned prior art, the utility model aims at providing a high strength bolt axle power moment of torsion composite detection device, it has the effect that can carry out axle power and the compound detection of moment of torsion to unwelded bolt.
The above object of the present invention is achieved by the following technical solutions:
a high-strength bolt axial force and torque composite detection device comprises a rack, wherein a slide way is formed in the rack, a first bearing vehicle and a second bearing vehicle are in sliding fit in the slide way, and a power device for driving the first bearing vehicle and the second bearing vehicle to move is mounted on the rack; a first tension plate is arranged on the first bearing vehicle, and a second tension plate corresponding to the first tension plate is arranged on the second bearing vehicle; the first tension plate and the second tension plate are provided with threaded holes corresponding to each other; the first bearing vehicle and the second bearing vehicle are connected with a tension and pressure detection device;
the first bearing vehicle is provided with a first fixing plate, and the second bearing vehicle is provided with a second fixing plate corresponding to the first fixing plate; a torsion gear is rotatably supported on the first fixing plate, and a hexagonal lower counter bore is formed in the torsion gear; two cylinders are fixed on the second fixing plate, the two cylinders are arranged oppositely, and the end part of a cylinder piston rod is fixed with a clamping piece; the first bearing vehicle is fixed with a motor, the motor is connected with a second speed reducer, an output shaft of the second speed reducer is coaxially fixed with a second torque sensor, a shaft of the second torque sensor is coaxially fixed with a transmission gear, and the transmission gear is meshed with the torque gear.
By adopting the technical scheme, when the capability of the bolt bearing axial tension is tested, the first tension plate and the second tension plate are mutually attached, the bolt to be tested passes through the first tension plate and the second tension plate through the threaded hole, the nut is used for applying pretightening force for fixing, the first bearing vehicle and the second bearing vehicle are enabled to move in a back-to-back manner through the power device, the first tension plate and the second tension plate generate axial tension on the bolt, and the axial tension borne by the bolt can be indirectly measured through the tension pressure detection device; when the torque of the bolt is tested, the bolt is clamped between the first fixing plate and the second fixing plate, the head of the bolt to be tested is clamped in a hexagonal sunken hole of the torque gear, the piston rod is driven by the air cylinder to abut the clamping piece on a screw rod of the bolt, then the motor is started, the motor drives the torque gear to rotate through the second speed reducer, the second torque sensor and the transmission gear, the torque gear applies the torque on the bolt, and the torque borne by the bolt can be tested through the second torque sensor; therefore, the utility model discloses have and to carry out the effect that axle power and moment of torsion compound detection to the bolt that does not weld.
The utility model discloses a further set up to: the power device comprises two coaxially fixed cylindrical cams which are rotatably supported on the frame, the two cylindrical cams are respectively arranged below the first bearing vehicle and the second bearing vehicle, and the two cylindrical cams are oppositely arranged; the outer side wall of the cylindrical cam is provided with an annular flange, and the flange is wound on the outer side wall of the cylindrical cam for a circle to form a closed track; two support shafts are fixed below the first bearing vehicle and the second bearing vehicle, the support shafts are matched with the side walls of the flanges, and the two support shafts are respectively arranged on two sides of the flanges; the cylindrical cam is connected with a driving device for driving the cylindrical cam to rotate.
By adopting the technical scheme, when the driving device drives the cylindrical cam to rotate, the flange can enable the roller to move along the flange, so that the first bearing vehicle and the second bearing vehicle are driven to move along the slide way; because the two cylindrical cams are oppositely arranged, the first carrier vehicle and the second carrier vehicle can keep moving towards each other or away from each other when moving.
The utility model discloses a further set up to: the driving device comprises a driving motor installed on the rack, an output shaft of the driving motor is connected with a first speed reducer, the tension and pressure detection device comprises a first torque sensor coaxially fixed on the output shaft of the first speed reducer, and a shaft of the first torque sensor is coaxially fixed with a shaft of the cylindrical cam.
Through adopting above-mentioned technical scheme, driving motor can drive first reduction gear and rotate to drive first torque sensor, first torque sensor drives the cylinder cam and rotates, can measure the moment of torsion that the cylinder cam bore according to the load that adds on the cylinder cam.
The utility model discloses a further set up to: the supporting shaft is rotatably supported with a roller, and the roller is attached to the side wall of the flange.
Through adopting above-mentioned technical scheme, when the cylinder cam drove first carrier vehicle and the second carrier vehicle and moved, the roller was pasted and can be avoided directly producing the friction between back shaft and the flange on the flange to change sliding friction into rolling friction, make first carrier vehicle and second carrier vehicle remove more smoothly.
The utility model discloses a further set up to: the threaded holes are provided with a plurality of groups and have different diameters.
Through adopting above-mentioned technical scheme, set up the screw hole of multiunit diameter diverse on first pulling force board and second pulling force board, can carry out axial tension test to the bolt of different diameters, improve the practicality.
The utility model discloses a further set up to: a first pressure plate is arranged on the first bearing vehicle, and a second pressure plate is arranged on the second bearing vehicle; the first pressure plate is provided with a positioning groove, and the positioning groove comprises a plurality of hexagonal lower counter bores which have different specifications and are mutually nested; the second pressure plate is fixed with a positioning cylinder, and the positioning cylinder corresponds to the positioning groove.
Through adopting above-mentioned technical scheme, when the test bolt bears axial pressure's ability, will await measuring the bolt and crowd between first pressure plate and second pressure plate, the head card that will await measuring the bolt is in the hexagonal sunken hole of constant head tank, the afterbody penetrates in the location section of thick bamboo, make first bearing vehicle and second bearing vehicle move in opposite directions through power device, then first pressure plate and second pressure plate will produce axial pressure to the bolt, can measure the axial pressure that the bolt bore through drawing pressure detection device.
The utility model discloses a further set up to: the first bearing vehicle is provided with a first shear plate, and the second bearing vehicle is provided with a second shear plate; the mounting seats are fixedly arranged above the first shearing plate and the second shearing plate, and through holes corresponding to each other are formed in the two mounting seats.
By adopting the technical scheme, when the shearing resistance of the bolt is tested, the two installation seats are attached to each other, the bolt penetrates through the through hole and passes through the two installation seats, the first bearing vehicle and the second bearing vehicle move in a back-to-back mode through the power device, the two installation seats apply a shearing force perpendicular to the axial direction of the bolt to the bolt, and the shearing force borne by the bolt can be tested through the tension and pressure detection device.
The utility model discloses a further set up to: the through holes are provided with a plurality of groups, and the diameters of each group of through holes are different.
Through adopting above-mentioned technical scheme, set up the through-hole of multiunit diameter diverse on the mount pad and can carry out the test of the ability of shearing to the unequal bolt of multiple diameter.
To sum up, the utility model discloses a beneficial technological effect does:
1. the first tension plate and the second tension plate face away from each other to apply axial tension to the bolt, the torque of the cylindrical cam is measured by using the first torque sensor, and the value of the axial tension borne by the bolt is indirectly reflected; measuring the torque applied to the bolt by the torque gear through a second torque sensor;
2. the driving motor drives the cylindrical cam to rotate, and the flange of the cylindrical cam forces the first bearing vehicle and the second bearing vehicle to move along the slide way; axial pressure can be applied to the bolt by the first pressure plate and the second pressure plate moving towards each other;
3. the first bearing vehicle and the second bearing vehicle are arranged in a back-to-back mode and can apply shearing force to the bolt, the torque borne by the cylindrical cam is measured through the first torque sensor, and the shearing force borne by the bolt is reflected indirectly.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the first and second vehicles;
fig. 3 is a schematic structural diagram of a power device and a driving device.
In the figure, 1, a frame; 11. a slideway; 2. a first carrier vehicle; 21. a first tension plate; 22. a first fixing plate; 221. a torque gear; 222. an electric motor; 223. a second decelerator; 224. a second torque sensor; 225. a transmission gear; 23. a first pressure plate; 231. positioning a groove; 24. a first shear plate; 3. a second carrier vehicle; 31. a second tension plate; 32. a second fixing plate; 321. a cylinder; 322. a clamping piece; 33. a second pressure plate; 331. a positioning cylinder; 34. a second shear plate; 41. a support shaft; 411. a roller; 42. a threaded hole; 43. a mounting seat; 431. a through hole; 5. a power plant; 51. a cylindrical cam; 511. a flange; 6. a drive device; 61. a drive motor; 62. a first decelerator; 63. a first torque sensor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 3, a high-strength bolt axial force and torque composite detection device disclosed by the present invention comprises a frame 1, a straight slide way 11 is provided on the frame 1, two trolleys, namely a first carriage 2 and a second carriage 3, are slidably fitted on the slide way 11; the first bearing vehicle 2 and the second bearing vehicle 3 are provided with devices for detecting the strength of the bolts, and the frame 1 is provided with a power device 5 for driving the first bearing vehicle 2 and the second bearing vehicle 3 to move.
Referring to fig. 3, the power device 5 includes two coaxially fixed cylindrical cams 51 rotatably supported on the frame 1, the two cylindrical cams 51 being disposed below the first carriage 2 and the second carriage 3, respectively; the axis of the cylindrical cam 51 is parallel to the length direction of the slideway 11, and the two cylindrical cams 51 are arranged oppositely; an annular flange 511 is arranged on the outer side wall of the cylindrical cam 51, and the flange 511 is wound on the outer side wall of the cylindrical cam 51 for a circle to form a closed track; the cylindrical cam 51 is connected with a driving device 6 for driving the cylindrical cam to rotate.
Referring to fig. 1 and 3, two support shafts 41 are fixed below the first vehicle 2 and the second vehicle 3, the support shafts 41 are matched with the side walls of the flange 511, and the two support shafts 41 are respectively arranged at two sides of the flange 511; a roller 411 is rotatably supported on the supporting shaft 41, and the roller 411 is attached to the side wall of the flange 511; when the cylindrical cam 51 rotates, the flange 511 can make the roller 411 move along the flange 511, so as to drive the first vehicle 2 and the second vehicle 3 to move along the slideway 11; due to the opposing arrangement of the two cylindrical cams 51, the first vehicle 2 and the second vehicle 3 will remain moving towards or away from each other when moving.
Referring to fig. 1 and 3, the driving device 6 of the cylindrical cam 51 includes a driving motor 61 installed on the frame 1, an output shaft of the driving motor 61 is connected with a first speed reducer 62, a first torque sensor 63 is coaxially fixed on an output shaft of the first speed reducer 62, and a shaft of the first torque sensor 63 is coaxially fixed with a shaft of the cylindrical cam 51; the driving motor 61 is started, the driving motor 61 drives the first speed reducer 62 to rotate, so that the first torque sensor 63 drives the cylindrical cam 51 to rotate, and the torque borne by the cylindrical cam 51 driving load can be measured by the first torque sensor 63.
Referring to fig. 1 and 2, a first tension plate 21 is mounted on the first vehicle 2, and the first tension plate 21 is fixed on the edge of the first vehicle 2 close to the second vehicle 3; a second tension plate 31 is arranged on the second carrier vehicle 3, and the second tension plate 31 is fixed on the edge of the second carrier vehicle 3 close to the first carrier vehicle 2; the first bearing vehicle 2 and the second bearing vehicle 3 move in opposite directions to enable the first tension plate 21 and the second tension plate 31 to be attached to each other; the first tension plate 21 and the second tension plate 31 are provided with threaded holes 42 corresponding to each other, and the threaded holes 42 are provided with a plurality of groups of bolts with different diameters for testing different diameters; when the capability of the bolt bearing the axial tension is tested, the first tension plate 21 and the second tension plate 31 are attached to each other, the bolt to be tested penetrates through the first tension plate 21 and the second tension plate 31 through the threaded hole 42 and is fixed by applying a pretightening force through the nut, the driving motor 61 is started to enable the first bearing vehicle 2 and the second bearing vehicle 3 to move in a back-to-back mode, the first tension plate 21 and the second tension plate 31 generate the axial tension to the bolt, the torque borne by the cylindrical cam 51 at the moment is measured through the first torque sensor 63, and the axial tension borne by the bolt can be indirectly measured.
Referring to fig. 1 and 2, a first fixing plate 22 is mounted on the first carriage 2, and a second fixing plate 32 corresponding to the first fixing plate 22 is mounted on the second carriage 3; a torsion gear 221 is rotatably supported on the first fixing plate 22, and a plurality of hexagonal lower counter bores which are different in specification and are mutually nested are formed in the torsion gear 221; two cylinders 321 are fixed on the second fixing plate 32, the two cylinders 321 are oppositely arranged, and the end of the piston rod of each cylinder 321 is fixed with a clamping piece 322; a motor 222 is fixed on the first carrier vehicle 2, the motor 222 is connected with a second speed reducer 223, a second torque sensor 224 is coaxially fixed on an output shaft of the second speed reducer 223, a transmission gear 225 is coaxially fixed on a shaft of the second torque sensor 224, and the transmission gear 225 is meshed with the torque gear 221; when the torque of the bolt is tested, the driving motor 61 is started to adjust the distance between the first carrier 2 and the second carrier 3 to a proper position, the bolt is clamped between the first fixing plate 22 and the second fixing plate 32, the head of the bolt to be tested is clamped in the hexagonal sunken hole of the torque gear 221, the piston rod is driven by the air cylinder 321 to press the clamping piece 322 against the screw rod of the bolt, then the motor 222 is started, the motor 222 drives the torque gear 221 to rotate through the second speed reducer 223, the second torque sensor 224 and the transmission gear 225, the torque gear 221 applies the torque on the bolt, and the torque borne by the bolt can be tested through the second torque sensor 224.
Referring to fig. 1 and 2, a first pressure plate 23 is mounted on the first vehicle 2, and the first pressure plate 23 is fixed on the edge of the first vehicle 2 close to the second vehicle 3; a second pressure plate 33 is arranged on the second bearing vehicle 3, and the second pressure plate 33 is fixed on the edge of the second bearing vehicle 3 close to the first bearing vehicle 2; the first pressure plate 23 is provided with a positioning groove 231, and the positioning groove 231 comprises a plurality of hexagonal lower counter bores which have different specifications and are mutually nested; a positioning cylinder 331 is fixed on the second pressure plate 33, and the positioning cylinder 331 corresponds to the positioning slot 231; when the capability of bearing the axial pressure of the bolt is tested, the bolt to be tested is squeezed between the first pressure plate 23 and the second pressure plate 33, the head of the bolt to be tested is clamped in the hexagonal sunken hole of the positioning groove 231, the tail of the bolt penetrates into the positioning cylinder 331, the driving motor 61 is started to enable the first bearing vehicle 2 and the second bearing vehicle 3 to move in the opposite direction, the first pressure plate 23 and the second pressure plate 33 generate the axial pressure on the bolt, the torque borne by the cylindrical cam 51 at the moment is measured through the first torque sensor 63, and the axial pressure borne by the bolt can be indirectly measured.
Referring to fig. 1 and 2, a first shear plate 24 is mounted on the first vehicle 2, and the first shear plate 24 is fixed on the edge of the first vehicle 2 close to the second vehicle 3; a second shear plate 34 is arranged on the second carrier 3, and the second shear plate 34 is fixed on the edge of the second carrier 3 close to the first carrier 2; mounting seats 43 are fixedly arranged above the first shearing plate 24 and the second shearing plate 34, through holes 431 which correspond to each other are formed in the two mounting seats 43, and a plurality of groups of bolts which are different in diameter and used for placing bolts with different diameters are formed in the through holes 431; when the shearing resistance of the bolt is tested, the two mounting seats 43 are attached to each other, the bolt penetrates through the two mounting seats 43 through the through hole 431 corresponding to the diameter of the bolt, the driving motor 61 is started, the driving motor 61 enables the first bearing vehicle 2 and the second bearing vehicle 3 to move back and forth, then the two mounting seats 43 apply a shearing force perpendicular to the axial direction of the bolt to the bolt, the torque borne by the cylindrical cam 51 at the moment is measured through the first torque sensor 63, and the shearing force borne by the bolt can be indirectly measured.
The embodiment of the present invention is a preferred embodiment of the present invention, which is not limited in this way to the protection scope of the present invention, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a compound detection device of high-strength bolt axial force moment of torsion, includes frame (1), its characterized in that: the device is characterized in that a slide way (11) is formed in the rack (1), a first bearing vehicle (2) and a second bearing vehicle (3) are in sliding fit in the slide way (11), and a power device (5) for driving the first bearing vehicle (2) and the second bearing vehicle (3) to move is mounted on the rack (1); a first tension plate (21) is arranged on the first bearing vehicle (2), and a second tension plate (31) corresponding to the first tension plate (21) is arranged on the second bearing vehicle (3); the first tension plate (21) and the second tension plate (31) are provided with threaded holes (42) which correspond to each other; the first bearing vehicle (2) and the second bearing vehicle (3) are connected with a tension and pressure detection device;
a first fixing plate (22) is arranged on the first bearing vehicle (2), and a second fixing plate (32) corresponding to the first fixing plate (22) is arranged on the second bearing vehicle (3); a torsion gear (221) is rotatably supported on the first fixing plate (22), and a hexagonal lower counter bore is formed in the torsion gear (221); two air cylinders (321) are fixed on the second fixing plate (32), the two air cylinders (321) are arranged oppositely, and clamping pieces (322) are fixed at the end parts of piston rods of the air cylinders (321); an electric motor (222) is fixed on the first bearing vehicle (2), the electric motor (222) is connected with a second speed reducer (223), a second torque sensor (224) is coaxially fixed on an output shaft of the second speed reducer (223), a transmission gear (225) is coaxially fixed on a shaft of the second torque sensor (224), and the transmission gear (225) is meshed with the torque gear (221).
2. The composite detection device for the axial force and the torque of the high-strength bolt according to claim 1, characterized in that: the power device (5) comprises two coaxially fixed cylindrical cams (51) which are rotatably supported on the rack (1), the two cylindrical cams (51) are respectively arranged below the first bearing vehicle (2) and the second bearing vehicle (3), and the two cylindrical cams (51) are oppositely arranged; an annular flange (511) is arranged on the outer side wall of the cylindrical cam (51), and the flange (511) is wound on the outer side wall of the cylindrical cam (51) for a circle to form a closed track; two support shafts (41) are fixed below the first bearing vehicle (2) and the second bearing vehicle (3), the support shafts (41) are matched with the side walls of the flanges (511), and the two support shafts (41) are respectively arranged on two sides of the flanges (511); the cylindrical cam (51) is connected with a driving device (6) for driving the cylindrical cam to rotate.
3. The composite detection device for the axial force and the torque of the high-strength bolt according to claim 2, characterized in that: the driving device (6) comprises a driving motor (61) installed on the rack (1), an output shaft of the driving motor (61) is connected with a first speed reducer (62), the tension and pressure detection device comprises a first torque sensor (63) coaxially fixed on an output shaft of the first speed reducer (62), and a shaft of the first torque sensor (63) is coaxially fixed with a shaft of the cylindrical cam (51).
4. The composite detection device for the axial force and the torque of the high-strength bolt as recited in claim 2 or 3, wherein: the supporting shaft (41) is rotatably supported with a roller (411), and the roller (411) is attached to the side wall of the flange (511).
5. The composite detection device for the axial force and the torque of the high-strength bolt according to any one of claims 1 to 3, characterized in that: the threaded holes (42) are provided with a plurality of groups with different diameters.
6. The composite detection device for the axial force and the torque of the high-strength bolt according to any one of claims 1 to 3, characterized in that: a first pressure plate (23) is arranged on the first bearing vehicle (2), and a second pressure plate (33) is arranged on the second bearing vehicle (3); the first pressure plate (23) is provided with a positioning groove (231), and the positioning groove (231) comprises a plurality of hexagonal lower counter bores which have different specifications and are mutually nested; the second pressure plate (33) is fixed with a positioning cylinder (331), and the positioning cylinder (331) corresponds to the positioning groove (231).
7. The composite detection device for the axial force and the torque of the high-strength bolt according to any one of claims 1 to 3, characterized in that: a first shear plate (24) is arranged on the first bearing vehicle (2), and a second shear plate (34) is arranged on the second bearing vehicle (3); the installation bases (43) are fixedly arranged above the first shear plate (24) and the second shear plate (34), and through holes (431) corresponding to each other are formed in the two installation bases (43).
8. The composite detection device for the axial force and the torque of the high-strength bolt according to claim 7, is characterized in that: the through holes (431) are provided with a plurality of groups, and the diameters of the through holes (431) in each group are different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921830473.9U CN210375489U (en) | 2019-10-25 | 2019-10-25 | High-strength bolt axial force and torque composite detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921830473.9U CN210375489U (en) | 2019-10-25 | 2019-10-25 | High-strength bolt axial force and torque composite detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210375489U true CN210375489U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921830473.9U Expired - Fee Related CN210375489U (en) | 2019-10-25 | 2019-10-25 | High-strength bolt axial force and torque composite detection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN210375489U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112525513A (en) * | 2020-12-02 | 2021-03-19 | 杨雯雯 | High strength bolt quality detection instrument |
-
2019
- 2019-10-25 CN CN201921830473.9U patent/CN210375489U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112525513A (en) * | 2020-12-02 | 2021-03-19 | 杨雯雯 | High strength bolt quality detection instrument |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200421 |
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| CF01 | Termination of patent right due to non-payment of annual fee |