CN119983980A - Rivet nut assembly accuracy detection device and detection method - Google Patents
Rivet nut assembly accuracy detection device and detection method Download PDFInfo
- Publication number
- CN119983980A CN119983980A CN202510352690.5A CN202510352690A CN119983980A CN 119983980 A CN119983980 A CN 119983980A CN 202510352690 A CN202510352690 A CN 202510352690A CN 119983980 A CN119983980 A CN 119983980A
- Authority
- CN
- China
- Prior art keywords
- rivet nut
- detection
- clamping
- rod
- driving disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Automatic Assembly (AREA)
Abstract
The invention relates to the technical field of detection of internal threads of rivet nuts, in particular to a rivet nut assembly precision detection device and a rivet nut assembly precision detection method. The clamping device is responsible for stabilizing the riveting nut, the position is kept unchanged in the detection process, and the detection device is used for detecting the assembly precision of the riveting nut. According to the invention, the spiral spring is stressed and compressed to generate elastic deformation by driving the driving disc to rotate forward, so that the hollow sleeve rotates along with the detection rod, the detection screw rod is matched with the internal thread of the rivet nut, and the assembly precision is judged by the elasticity change of the spiral spring, namely, the size of the internal thread gap of the rivet nut is reflected according to the stress change of the spiral spring.
Description
Technical Field
The invention relates to the technical field of detection of internal threads of rivet nuts, in particular to a rivet nut assembly precision detection device and a rivet nut assembly precision detection method.
Background
Rivet nuts play an indispensable role as an important fastener in numerous industrial fields, in particular in the aeronautical, mechanical, electronic and other industries. The main purpose of the device is to connect and fix the components by fixing bolts or other fasteners to rivets having threaded holes therein. In many fastener applications, the quality of the internal threads of the rivet nut directly determines the integrity and reliability of the overall component. Therefore, it is important to ensure the machining accuracy and surface quality of the internal thread of the rivet nut.
However, some existing detection methods have some limitations in practical operations, such as a nut internal thread detection device with the publication number of CN220083846U, which comprises a mounting table, a pushing component, a detection component and two clamping components for clamping a plurality of nuts, wherein the plurality of nuts are placed between two limiting plates, then the pushing component pushes the plurality of nuts to move towards two connecting plates, the nuts push the two connecting plates away from each other, so that the two limiting plates compress the two elastic supporting components, the two clamping plates are pushed to clamp the nuts by the reset of the elastic supporting components, then the first telescopic device is controlled by a controller to push the detection component to move downwards, and the internal threads of the nuts are detected by the detection device.
In the prior art, whether the internal thread of the nut meets the set standard is evaluated by detecting the threaded fit of the screw rod and the nut. However, when there is a slight deviation in the thread dimensions, even if the screw and the thread can be engaged, an assembly accuracy problem occurs. For example, if the internal thread size of the nut is smaller than a given standard, the threaded engagement between the screw and the nut becomes difficult, requiring the application of a greater torque to control the rotation of the screw, which requires a rotational force exceeding a given value. Conversely, if the internal thread size of the nut is greater than the predetermined standard, the threaded engagement between the screw and the nut becomes too relaxed, the required torque decreases, and after the threaded engagement, loosening may occur between the screw and the nut.
Based on this, the above prior art cannot meet the requirement of high-precision assembly, so that potential safety hazards and unstable performance exist in practical application. Therefore, it is important to develop a device capable of accurately detecting the assembly accuracy of the rivet nut.
Disclosure of Invention
In order to solve the problems, the invention provides a rivet nut assembly precision detection device and a rivet nut assembly precision detection method.
In a first aspect, a rivet nut assembly accuracy detection device, including the foundation plate, still include:
The clamping device is assembled on the foundation base plate and comprises two groups of clamping side plates, and a plurality of clamping pieces are arranged between the two groups of clamping side plates and used for bearing clamping rivet nuts;
The detection device is arranged above the clamping device and comprises a plurality of groups of hollow sleeves which are in one-to-one correspondence with the clamping pieces, a driving disc is sleeved outside the hollow sleeves, a spiral spring is arranged between the hollow sleeves and the driving disc, the hollow sleeves are driven to rotate by the spiral spring when the driving disc rotates, and a detection rod is arranged in the hollow sleeves in a sliding manner and used for detecting internal threads of the rivet nuts;
and the lifting device is assembled on the foundation base plate and positioned on one side of the clamping device, the detection device is assembled on the lifting device, and the longitudinal movement of the detection device is controlled through the lifting device.
Preferably, the detection device further comprises a transverse mounting plate, the upper end of the driving plate is provided with a driving ring, the driving ring is rotatably arranged at the bottom of the transverse mounting plate, all the driving rings are in transmission connection in a belt transmission mode, the lower end of the driving plate is detachably provided with a protective shell, and the scroll spring is arranged in the protective shell.
Preferably, one end of the scroll spring is detachably arranged on the hollow sleeve, the other end of the scroll spring is detachably arranged on the supporting cylinder, the end, facing the driving disc, of the supporting cylinder is provided with a sliding block, the driving disc is provided with a sliding groove along the radial direction, and the sliding block is detachably arranged in the sliding groove and slides in the sliding groove.
Preferably, the driving disc is provided with a plurality of sliding grooves, the sliding grooves are circumferentially distributed on the driving disc at equal intervals, the intervals from one end of each sliding groove close to the edge of the driving disc to the hollow sleeve are different, and one side of each sliding groove is provided with a scale bar for measuring the sliding distance of the sliding block in the sliding groove.
Preferably, the support cylinder is provided with a displacement sensor towards one side of the hollow sleeve, and the distance between the support cylinder and the hollow sleeve is measured through the displacement sensor so as to judge the sliding distance of the sliding block in the sliding groove.
Preferably, the driving disc is in transmission connection with the hollow sleeve through a ratchet wheel and a pawl, when the detection rod detects, the driving disc rotates positively so as to drive the hollow sleeve to rotate positively through the scroll spring, the ratchet wheel and the pawl do not work, and when the detection rod resets, the driving disc rotates reversely, and drives the hollow sleeve to rotate reversely through the ratchet wheel and the pawl, and the scroll spring does not work.
Preferably, the bottom of the detection rod is detachably connected with a detection screw rod, the assembly precision of the rivet nut is detected through the matching of the detection screw rod and the internal thread of the rivet nut, the top of the detection rod is in threaded connection with an extension rod, and the top of the extension rod is provided with a rod cap.
Preferably, the transverse mounting plate is provided with a through hole corresponding to the hollow sleeve, the through hole is detachably provided with a mounting sleeve, the top of the mounting sleeve is provided with a cylinder cover, the middle part of the cylinder cover rotates to penetrate through a rotating shaft, the lower end of the rotating shaft is provided with an electromagnet positioned below the cylinder cover, and the electromagnet attracts the rod cap to move upwards when the electromagnet is electrified.
Preferably, the outer side wall of the rod cap is rotatably provided with a pre-pressing plate, the top of the cylinder cover is provided with an elastic telescopic rod, and the telescopic end of the elastic telescopic rod gives the pre-pressing plate a downward pressure when contacting with the pre-pressing plate.
In a second aspect, a method for detecting assembly accuracy of a rivet nut, the method comprising the steps of:
firstly, placing a rivet nut to be detected on a clamping piece so as to clamp the rivet nut between two groups of clamping side plates through the clamping piece;
Secondly, driving the detection device to move downwards through the lifting device so as to enable the detection rod to be accurately aligned with the internal threaded hole of the rivet nut, and then driving the driving disc to rotate, wherein the hollow sleeve drives the detection rod to be slowly screwed into the internal threaded hole of the rivet nut under the action of the scroll spring;
Thirdly, after detection is completed, the driving disc reversely rotates, the hollow sleeve drives the detection rod to withdraw from the internal threaded hole of the rivet nut, and the lifting device drives the detection device to move upwards for resetting;
And step four, judging whether the internal thread quality of the rivet nut is qualified according to the deformation of the scroll spring, simultaneously releasing the clamping of the clamping piece on the rivet nut, taking out the detected rivet nut, and classifying and storing the qualified and unqualified rivet nuts.
In summary, the application has the following beneficial technical effects:
1. According to the invention, the spiral spring is stressed and compressed to generate elastic deformation by driving the driving disc to rotate forward, so that the hollow sleeve rotates along with the detection rod, the detection screw rod is matched with the internal thread of the rivet nut, and the assembly precision is judged by the elasticity change of the spiral spring, namely, the size of the internal thread gap of the rivet nut is reflected according to the stress change of the spiral spring.
2. According to the invention, when the electromagnet is electrified, the generated magnetic force attracts the detection rod, so that the detection screw rod has a tendency of upward movement, the pulling state of the detection screw rod and the rivet nut in the actual assembly process is simulated, the detection accuracy of the assembly precision is further improved, the driving disc reversely rotates, the detection screw rod is gradually separated from the rivet nut under the cooperation of the ratchet wheel and the pawl, the detection screw rod has a stable pulling force in the separation process, and the double verification mechanism ensures the assembly precision.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of the detection device of the present invention.
Fig. 3 is a schematic diagram of a second structure of the detection device of the present invention.
Fig. 4 is a schematic diagram of a detecting device according to the present invention.
Fig. 5 is a schematic diagram of the structure of the detection device of the present invention.
Fig. 6 is a schematic view of the structure of the invention between the inspection bar, the inspection screw and the bar cap.
Fig. 7 is an enlarged view of a portion of fig. 2 a of the present invention.
Fig. 8 is a schematic structural view of the lifting device of the present invention.
Fig. 9 is a schematic structural view of the clamping device of the present invention.
Fig. 10 is a partial enlarged view of the present invention at B in fig. 9.
Fig. 11 is a side view of the clip of the present invention.
1, Base plate, 2, clamping device, 20, clamping side plate, 21, clamping piece, 211, clamping plate, 212, clamping rod, 213, synchronous plate, 214, electric push rod, 215, limiting plate, 216, adjusting screw, 217, extension bar, 218, adjusting plate, 219, sliding hole, 220, bidirectional screw rod, 3, detection device, 30, transverse mounting plate, 300, hollow sleeve, 301, driving plate, 302, scroll spring, 303, detection rod, 304, driving ring, 305, protective shell, 306, supporting cylinder, 307, sliding block, 308, chute, 309, scale bar, 310, displacement sensor, 311, detection screw, 312, stud, 313, extension bar, 314, rod cap, 315, mounting sleeve, 316, cylinder cap, 317, rotating shaft, 318, electromagnet, 319, pre-pressing plate, 320, elastic telescopic rod, 321, annular cover plate, 322, cushion, 4, lifting device, 401, lifting frame, 402, lifting plate, 403, lifting screw rod, 404, guide rod, 405, and guide slide bar. 50. Rivet nut 501, annular outer edge.
Detailed Description
Embodiments of the present invention are described in detail below with reference to fig. 1-11.
Referring to fig. 1, an assembly accuracy detection device for a rivet nut comprises a base plate 1, wherein a clamping device 2 and a detection device 3 are arranged on the base plate 1. The clamping device 2 is responsible for stabilizing the rivet nut 50, ensuring that the position remains unchanged during the detection process, and the detection device 3 is used for detecting the assembly accuracy of the rivet nut 50.
Specifically, the clamping device 2 is assembled on the base plate 1, the clamping device 2 includes two sets of clamping side plates 20, a plurality of clamping pieces 21 are arranged between the two sets of clamping side plates 20, and are used for bearing clamping rivet nuts 50, and the rivet nuts 50 are fixed between the two sets of clamping side plates 20 through the clamping pieces 21.
Referring to fig. 2 to 4, the detecting device 3 is disposed above the clamping device 2, the detecting device 3 includes a plurality of sets of hollow sleeves 300 corresponding to the clamping members 21 one by one, the hollow sleeves 300 are configured as hollow annular cylinder structures, the driving discs 301 are sleeved outside the hollow sleeves 300, the driving discs 301 are configured as circular structures, the side walls of the upper ends of the hollow sleeves 300 are provided with annular cover plates 321, and the lower surfaces of the annular cover plates 321 are in rotational contact with the upper surfaces of the driving discs 301. A spiral spring 302 is arranged between the hollow sleeve 300 and the driving disc 301, the hollow sleeve 300 is driven to rotate by the spiral spring 302 when the driving disc 301 rotates, and the matching precision of the internal threads of the rivet nut 50 is judged by the stress change of the spiral spring 302. The spiral spring 302 generates elastic force under the action of the driving disc 301, and then the hollow sleeve 300 is driven to rotate by using the elastic force, so that accurate measurement of the internal thread of the rivet nut 50 is realized.
The hollow sleeve 300 is internally and slidably provided with a detection rod 303, the detection rod 303 is used for detecting the internal thread of the rivet nut 50, the bottom of the detection rod 303 is detachably connected with a detection screw 311, and the assembly precision of the rivet nut 50 is detected through the matching of the detection screw 311 and the internal thread of the rivet nut 50.
The drive disk 301 is in driving connection with the hollow sleeve 300 by a ratchet and pawl.
When the detection rod 303 detects, the driving disc 301 rotates forward, the ratchet pawl does not work, the hollow sleeve 300 is rotated through the scroll spring 302, the detection rod 303 rotates along with the rotation, the detection screw 311 starts to be matched with the internal thread of the rivet nut 50, if the thread clearance is too large or too small, the elasticity of the scroll spring 302 correspondingly changes, the rotation resistance of the driving disc 301 is increased or reduced, and the assembly precision of the rivet nut 50 is obtained through the elasticity change quantity of the scroll spring 302.
When the detection rod 303 is reset, the driving disc 301 rotates reversely, the spiral spring 302 does not work, the ratchet pawl starts to work, the hollow sleeve 300 is driven to rotate reversely, and the detection rod 303 drives the detection screw 311 to be separated from the internal thread of the rivet nut 50, so that quick reset is realized.
The outer side wall of the detecting rod 303 is configured as an external spline structure, and is in sliding fit with a corresponding internal spline of the inner wall of the hollow sleeve 300, so that the detecting rod 303 can be driven to synchronously rotate when the hollow sleeve 300 rotates, and meanwhile, the axis sliding of the detecting rod 303 in the hollow sleeve 300 is not influenced.
Referring to fig. 6, further, a stud 312 is provided at the upper end of the detection screw 311, a threaded hole is provided at the bottom of the detection screw 303 and is in threaded engagement with the stud 312, the detection screw 311 is installed by engaging the stud 312 with the threaded hole, and a pin penetrating into the stud 312 is provided on the side wall of the bottom of the detection screw 303, and is used for locking the stud 312 to prevent the detection screw 311 from loosening during the detection process. The detection screw 311 is installed through the stud 312, so that the detection screw 311 with different specifications can be replaced conveniently, and the detection requirements of various riveting nuts 50 are met.
Referring to fig. 2 and 4, the detecting device 3 further includes a transverse mounting plate 30, the upper end of the driving plate 301 is provided with a driving ring 304, the driving ring 304 is rotatably mounted at the bottom of the transverse mounting plate 30, all the driving rings 304 are in transmission connection through a belt transmission mode, the belt transmission is driven by a driving motor (not shown in the drawings), the driving rings 304 are driven to synchronously rotate after the motor is started, and then all the driving plates 301 are driven to rotate, so that simultaneous detection of multiple groups of rivet nuts 50 is realized, and the detection efficiency is improved.
The driving motor is provided with a variable frequency speed regulation function, the rotating speed can be regulated according to the detection requirements of different rivet nuts 50, and has a forward and reverse rotation function, and the detection and reset operation of the detection rod 303 is realized by controlling the forward and reverse rotation of the motor, so that the flexibility and the accuracy of the detection process are ensured.
Referring to fig. 2 to 4, the lower end of the driving disc 301 is detachably provided with a protective housing 305, the spiral spring 302 is arranged in the protective housing 305, the protective housing 305 effectively prevents spring damage, is convenient to maintain and replace, meanwhile, the protective housing 305 is made of transparent rubber material, and particularly can be made of polycarbonate material, so that the internal structure can be observed conveniently, and the operation safety is ensured. The protective housing 305 is designed with heat dissipating holes (not shown) to prevent the over-heating of the spiral spring 302 during long-term operation and to extend the service life.
The driving disc 301 is detachably mounted on the driving ring 304, so that daily maintenance and replacement are facilitated, and the driving disc 301 is made of high-strength alloy materials, so that durability and stability are ensured. A shock pad (not shown) is provided between the drive ring 304 and the transverse mounting plate 30, so that vibration during operation is reduced, and detection accuracy is improved.
Because the driving disk 301 is acted on the hollow sleeve 300 by the elastic force generated by the winding deformation of the scroll spring 302 during the detection of the rivet nut 50, the end of the scroll spring 302 remote from the hollow sleeve 300 is slidably provided on the driving disk 301 in the radial direction thereof.
Referring to fig. 5, specifically, one end of the spiral spring 302 is detachably mounted on the hollow sleeve 300, the other end is detachably mounted on the supporting cylinder 306, and one end of the supporting cylinder 306 facing the driving disk 301 is provided with a sliding block 307, a sliding groove 308 is formed on the driving disk 301 along the radial direction, and the sliding block 307 is detachably mounted in the sliding groove 308 and slides in the sliding groove 308. The scroll spring 302 is ensured to freely stretch out and draw back under the drive of the driving disk 301, and meanwhile, the friction resistance is reduced by the matching design of the sliding block 307 and the sliding groove 308, so that the response speed and the detection precision of the scroll spring 302 are improved. The slider 307 is made of a wear-resistant material, and has a long service life and ensures long-term stable operation.
The inner wall of the sliding groove 308 is provided with a lubrication groove (not shown in the figure), and the lubrication groove is filled with special lubricant, so that friction is further reduced, smooth movement of the sliding block 307 is ensured, and overall detection efficiency is improved.
With continued reference to fig. 5, in addition, the driving disc 301 has a plurality of sliding grooves 308, and the sliding grooves 308 are circumferentially distributed on the driving disc 301 at equal intervals, and the intervals from one end of the sliding grooves 308 near the edge of the driving disc 301 to the hollow sleeve 300 are different, so that the sliding grooves 308 are slidably and detachably installed in one of the sliding grooves 308.
Initially, because of the elastic force of the spiral spring 302, the sliding block 307 is at the initial position of the sliding groove 308, that is, the sliding block 307 is at one end of the sliding groove 308 far away from the hollow sleeve 300, along with the rotation of the driving disc 301, the sliding block 307 gradually moves in the sliding groove 308 to drive the spiral spring 302 to stretch, the deformation of the spiral spring 302 generates corresponding elastic force to drive the hollow sleeve 300 to rotate, and the accurate detection of the rivet nut 50 is realized.
One side of each sliding groove 308 is provided with a scale bar 309 to measure the sliding distance between the sliding block 307 and the sliding groove 308, the deformation amount of the spiral spring 302 depends on the thread engagement degree between the detection screw 311 and the rivet nut 50, and if the position of the sliding block 307 in the sliding groove 308 is not consistent with the preset standard scale, the scale bar 309 indicates that the thread engagement has a problem, that is, the internal thread of the rivet nut 50 is not qualified, the assembly precision of the rivet nut 50 is affected, and the position needs to be adjusted or replaced in time.
When the position of the sliding block 307 in the sliding groove 308 is smaller than a preset standard scale, the deformation of the side-indicating scroll spring 302 is smaller than a preset value, which indicates that the screw engagement is too loose, that is, the internal screw size of the rivet nut 50 is too large, so that the assembly is unstable, otherwise, if the position is larger than the preset standard scale, the deformation of the scroll spring 302 is too large, the screw engagement is too tight, that is, the internal screw size of the rivet nut 50 is too small, stress concentration is easy to generate during the assembly, the structural strength is influenced, and the assembly quality is ensured by reworking or replacement. Through the design, the quality of the internal threads of the rivet nut 50 is accurately detected, the assembly error caused by the thread problem is effectively avoided, and the assembly precision of the rivet nut 50 is improved.
The support cylinder 306 is provided with a displacement sensor 310 towards one side of the hollow sleeve 300, the displacement sensor 310 measures the distance between the support cylinder 306 and the hollow sleeve 300, the sliding distance of the sliding block 307 in the sliding groove 308 is determined according to the distance, the actual deformation of the scroll spring 302 is evaluated, and meanwhile, the reading of the scale bar 309 is referred to, so that double verification of the thread engagement state is realized, and the reliability and the accuracy of the detection result are ensured.
In the second embodiment, whether the internal thread of the rivet nut 50 is qualified or not is judged by detecting the meshing degree of the screw 311 and the thread of the rivet nut 50 only through the deformation degree of the scroll spring 302 and the position change of the sliding block 307, and the assembly precision meets the requirement or not is judged, but the assembly precision under complex working conditions is difficult to comprehensively reflect only through the deformation of the scroll spring 302 and the position of the sliding block 307, so that on the basis of the first embodiment, the first embodiment drives the meshing strength of the detection screw 311 and the rivet nut 50 by pulling the detection rod 303 when the detection rod 303 moves upwards and resets, the stress condition in the actual assembly process is further simulated, the comprehensiveness and the accuracy of the detection result are ensured, and the assembly quality and the assembly precision of the rivet nut 50 are more effectively ensured.
Referring to fig. 6, in particular, an extension rod 313 is screw-coupled to the top of the detection rod 303, and a rod cap 314 is provided on the top of the extension rod 313. By pulling the lever cap 314, the extension lever 313 is driven to move the detection lever 303 longitudinally.
Referring to fig. 2 and 7, a through hole is formed at a position of the transverse mounting plate 30 corresponding to the hollow sleeve 300, a mounting sleeve 315 is detachably mounted on the through hole, a cylinder cover 316 is mounted at the top of the mounting sleeve 315, a rotating shaft 317 is rotatably arranged in the middle of the cylinder cover 316, an electromagnet 318 is mounted at the lower end of the rotating shaft 317 and below the cylinder cover 316, and the rod cap 314 is made of a magnetic material which can be attracted by the electromagnet 318, so that the rod cap 314 is attracted to move upwards when the electromagnet 318 is electrified.
After the engagement of the detection screw 311 and the rivet nut 50 is completed, the rod cap 314 is controlled to move upwards through the electromagnet 318 to drive the extension rod 313 and the detection rod 303 to reset so as to drive the detection screw 311 and the rivet nut 50 to generate pulling force, so that the engagement strength of the detection screw 311 and the rivet nut 50 is detected, and the stress condition in actual assembly is simulated.
After the electromagnet 318 is electrified, a magnetic attraction force is generated on the rod cap 314 to drive the rod cap 314 to move upwards, under normal conditions, the rod cap 314 has an upward moving trend, but the detection screw 311 and the rivet nut 50 are in an engaged state, the upward movement of the rod cap 314 is blocked and cannot be smoothly moved upwards, if the detection screw 311 is not tightly engaged with the rivet nut 50, the rod cap 314 moves upwards under the action of the magnetic attraction force, axial sliding is generated between the detection screw 311 and the rivet nut 50, so that the defect of internal threads of the rivet nut 50 is exposed, and the thread engagement quality can be accurately judged by observing the movement conditions of the rod cap 314, the detection screw 303 or the detection screw 311.
In this way, not only can the thread defect be effectively identified, but also the fine change in the assembly process can be monitored in real time, and each rivet nut 50 can be ensured to meet the high-standard assembly requirement, so that the overall assembly efficiency and the product quality are improved.
When the electromagnet 318 is electrified, the detection screw 311 has a tendency to move upwards, meanwhile, the driving disc 301 rotates reversely, the hollow sleeve 300 is driven to rotate reversely through the ratchet pawl, the detection screw 311 rotates reversely synchronously, the detection screw 311 starts to be disengaged from the internal thread of the rivet nut 50, when the electromagnet 318 is electrified to drive the rod cap 314 to have a tendency to move upwards, the detection screw 311 has a pulling force to move upwards while the detection screw 311 is disengaged from the internal thread of the rivet nut 50, and the double verification mechanism further detects the engagement quality of the internal thread of the rivet nut 50.
When the electromagnet 318 is powered off, and the detecting screw 311 is disengaged from the engagement state of the rivet nut 50, under the action of gravity, the detecting rod 303, the detecting screw 311, the extension rod 313 and the rod cap 314 drop down in sequence and reset, the cushion pad 322 is sleeved on the upper end of the hollow sleeve 300, the rod cap 314 drops onto the cushion pad 322, so that the dropping impact force can be effectively absorbed, and mechanical damage is avoided, wherein the cushion pad 322 is made of rubber material preferentially, so that the durability and stability of the equipment are improved.
In addition, initially, hollow sleeve 300 is driven to rotate synchronously by spiral spring 302 as drive disk 301 rotates in the forward direction. The detection rod 303 slides axially in the hollow sleeve 300, and in the initial engagement stage, the detection rod 311, the detection screw 311, the extension rod 313 and the rod cap 314 may not be engaged smoothly due to the dead weight of the detection rod 303, the detection screw 311, the rivet nut 50, and therefore, the pre-pressing plate 319 is rotatably mounted on the outer side wall of the rod cap 314, the elastic telescopic rod 320 is mounted on the top of the cylinder cover 316, and the pressing force is given to the pre-pressing plate 319 when the telescopic end of the elastic telescopic rod 320 contacts with the pre-pressing plate 319.
When initial engagement is performed, the rod cap 314 is at the highest position, namely is in contact with the electromagnet 318, at the moment, the elastic telescopic rod 320 is compressed and contracted to push the pre-pressing plate 319 to apply force downwards, so that initial pre-pressing force is generated between the detection screw 311 and the rivet nut 50, smooth engagement is ensured, unstable engagement caused by insufficient dead weight is avoided, and detection accuracy is improved.
It should be noted that, the mounting sleeve 315 and the cover 316 are made of transparent materials, so as to observe the internal structure and the operation state, and ensure that an operator can monitor the dynamic changes of the rod cap 314 and the detection rod 303 in real time.
Further, as shown in fig. 1, a lifting device 4 is mounted on the base plate 1 and located at one side of the clamping device 2, the detecting device 3 is mounted on the lifting device 4, and the longitudinal movement of the detecting device 3 is controlled by the lifting device 4.
Referring to fig. 8, the lifting device 4 includes a lifting frame 401, a lifting plate 402 is longitudinally slidably disposed in the lifting frame 401, a transverse mounting plate 30 is mounted on one side of the lifting plate 402, and a lifting screw 403 in threaded engagement with the lifting plate 402 is rotatably mounted in the lifting frame 401.
The lifting frame 401 is detachably mounted on the base plate 1, two groups of lifting screw rods 403 are arranged, the lower ends of the lifting screw rods 403 are rotatably arranged below the base plate 1, and the bottoms of the two groups of lifting screw rods 403 are in transmission connection through chain transmission.
When the rivet nut 50 is ready to be detected, the electromagnet 318 is electrified to drive the rod cap 314, the detection rod 303 and the detection screw 311 to move upwards until the rod cap 314 moves upwards to be in contact with the electromagnet 318, at the moment, the rivet nut 50 to be detected is placed on the clamping piece 21, the clamping piece 21 clamps the rivet nut 50, a motor connected with one lifting screw 403 is started, the other lifting screw 403 is driven to synchronously rotate through chain transmission, the lifting plate 402 moves downwards along with the lifting screw 403 until the lower end of the detection screw 311 is in contact with the rivet nut 50, then the electromagnet 318 is powered off, the rod cap 314 is subjected to the combined action of gravity and the resilience force of the elastic telescopic rod 320, and the detection screw 311 is given an initial pre-compression force to ensure that the detection screw 311 is tightly meshed with the rivet nut 50.
After the preliminary preparation work is completed, the motor connected with the driving ring 304 is started, the driving disc 301 rotates forward, the spiral spring 302 is driven to rotate, the hollow sleeve 300 and the detection rod 303 are driven to rotate synchronously, the detection screw 311 gradually goes deep and is meshed with the rivet nut 50, the contact between the elastic telescopic rod 320 and the pre-pressing plate 319 is disconnected due to the increase of the meshing depth, and at the moment, the meshing of the detection screw 311 and the rivet nut 50 completely depends on the structure of the motor, so that the stable detection process is ensured.
In the detection process, an operator can observe the relative position change of the lever cap 314 and the detection lever 303 in real time through the transparent mounting sleeve 315 and the barrel cover 316, so as to determine whether the engagement state is normal.
Referring to fig. 8, a plurality of groups of guide rods 404 distributed at equal intervals are further rotatably arranged in the lifting frame 401, the lifting plates 402 are slidably arranged on the guide rods 404 in a penetrating manner, guide sliding strips 405 are arranged on the inner side walls of two side plates of the lifting frame 401, sliding holes matched with the guide sliding strips 405 in a sliding manner are formed in two ends of the lifting plates 402, and the guide rods 404 ensure that the lifting plates 402 move stably and avoid deflection.
Referring to fig. 9 to 11, the clamping member 21 is further optimized on the basis of the first embodiment and the second embodiment, specifically, the clamping side plate 20 has an inverted L-shaped structure formed by a transverse plate and a vertical plate, the clamping member 21 comprises two symmetrically distributed clamping plates 211, a non-slip pad is arranged on the inner side of each clamping plate 211, the clamping plates 211 preferably select a V-shaped structure to enhance the stable clamping force on the rivet nut 50, and the clamping force has a centering adjusting technical effect when clamping the rivet nut 50, so that the rivet nut 50 and the detection screw 311 are ensured to be on the same axis.
The opposite sides of the two clamping plates 211 are respectively connected with a clamping rod 212, the clamping rods 212 are respectively penetrated through the clamping side plates 20 in a sliding manner, the riveting nut 50 is placed between the two clamping plates 211, and the clamping rods 212 are driven to realize the relative movement of the two clamping plates 211, so that the riveting nut 50 is clamped between the two clamping plates 211.
The opposite sides of the two clamping side plates 20 are respectively provided with a synchronizing plate 213, one end, far away from the clamping plate 211, of the clamping rod 212 is connected to the synchronizing plates 213, and an electric push rod 214 is connected between the synchronizing plates 213 and the clamping side plates 20. The electric push rod 214 controls the movement of the synchronization plate 213 to realize synchronous expansion and contraction of the two clamping rods 212, ensure balanced clamping force of the clamping plate 211 on the rivet nut 50, and avoid detection errors caused by uneven clamping. The stroke of the electric push rod 214 is adjustable to adapt to rivet nuts 50 with different sizes, and flexibility and accuracy of detection are improved.
Because the upper end of the rivet nut 50 is provided with the protruding annular outer edge 501, when the rivet nut 50 is placed, the annular outer edge 501 of the rivet nut 50 can bear on the upper surfaces of the two clamping plates 211, so that the bottom of the rivet nut 50 is not contacted with the foundation slab 1, namely, the rivet nut 50 is in a suspended state, and the bearing clamping and the internal thread detection of the rivet nut 50 can be carried out on the rivet nuts 50 with different lengths.
A plate groove corresponding to the clamping plate 211 is formed in the transverse plate of the clamping side plate 20, a limiting plate 215 is longitudinally and slidably arranged in the plate groove, the limiting plate 215 is connected to the clamping side plate 20 through an adjusting screw 216 in a threaded mode, and the end portion, extending out of the transverse plate, of the limiting plate 215 is used for abutting against the upper surface of the annular outer edge 501 of the rivet nut 50. The limiting plate 215 can be adjusted according to the thickness dimension of the annular outer edge 501 of the rivet nut 50, accurate limiting of the annular outer edge 501 of the rivet nut 50 is guaranteed, the limiting plate 215 is of an inverted L-shaped structure, the horizontal section of the limiting plate 215 is parallel to the transverse plate, the vertical section of the limiting plate is tightly attached to the vertical plate, one section of the horizontal section of the limiting plate 215 extending out of the transverse plate is used for applying stable limiting force to the annular outer edge 501 of the rivet nut 50, deflection of the rivet nut 50 in the detection process is prevented, and detection accuracy is guaranteed.
Initially, the rivet nut 50 is placed between the horizontal section of the limiting plate 215 and the upper surface of the clamping plate 211, i.e., the annular outer edge 501 of the rivet nut 50 needs to be supported by both the limiting plate 215 and the upper surface of the clamping plate 211, which increases the difficulty in initial placement and requires precise alignment of the upper surfaces of the two. To solve this problem, the invention provides an extension bar 217 extending out of the transverse plate on the lower surface of the transverse plate of the clamping side plate 20, the extension bar 217 is used for bearing the lower surface of the annular outer edge 501 of the rivet nut 50, and the extension bar 217 is separated at the position of the limiting plate 215 so as to be distributed in a dislocation manner with the limiting plate 215.
In initial placement, the annular outer edge 501 of the rivet nut 50 is firstly placed on the two extension strips 217, and then the rivet nut 50 is pushed to move towards the limiting plate 215 along the length direction of the extension strips 217 until the annular outer edge 501 of the rivet nut 50 slides between the horizontal section of the limiting plate 215 and the upper surface of the clamping plate 211, so that accurate positioning is realized. Through the design, the placing process of the rivet nut 50 is simplified, the stability of the rivet nut in detection is ensured, and the detection efficiency and the detection precision are further improved. The smart matching of the extension strip 217 and the limiting plate 215 makes the operation more convenient, reduces human error and embodies the practicability and innovation of the invention.
It should be noted that, according to the invention, the annular outer edge 501 of the rivet nut 50 is supported on the upper surface of the clamping plate 211, so that the contact between the detection screw 311 and the internal thread of the rivet nut 50 is smoother and smoother during initial engagement, while the limiting plate 215 provided by the invention is used in the state that the electromagnet 318 is electrified, the detection screw 311 has a tendency to move upwards, the horizontal section of the limiting plate 215 limits the axial movement of the rivet nut 50, and the axial stretching of the detection screw 311 and the internal thread of the rivet nut 50 is ensured to be smoothly carried out.
The two ends downside of the clamping side plate 20 is provided with an adjusting plate 218, the base plate 1 is provided with a sliding hole 219 for the adjusting plate 218 to move, a bidirectional screw rod 220 is connected between the bottoms of the two adjusting plates 218 on the same side of the two groups of clamping side plates 20 in a threaded manner, namely, the two adjusting plates 218 are connected with the two ends of the bidirectional screw rod 220 in a threaded manner, the bidirectional screw rod 220 is rotatably arranged on a base arranged at the lower end of the base plate 1, and one end of the bidirectional screw rod 220 is provided with a handle. By rotating the handle, the bidirectional screw rod 220 drives the adjusting plate 218 to synchronously move, so that the spacing between the clamping side plates 20 is accurately adjusted to adapt to the rivet nuts 50 with different sizes.
In addition, the application also provides a method for detecting the assembly precision of the rivet nut, which comprises the following steps:
in the first step, the rivet nut 50 to be inspected is placed on the clamping member 21 so that the rivet nut 50 is clamped between the two sets of clamping side plates 20 by the clamping member 21.
Secondly, the lifting device 4 drives the detection device 3 to move downwards so that the detection rod 303 is accurately aligned with the internal threaded hole of the rivet nut 50, then the driving disc 301 is driven to rotate, under the action of the scroll spring 302, the hollow sleeve 300 drives the detection rod 303 to slowly screw into the internal threaded hole of the rivet nut 50, and the screwing depth and the resistance condition of the detection rod 303 are judged by observing the deformation of the scroll spring 302, so that the quality of the internal threads of the rivet nut 50 is further judged.
Third, after the detection is completed, the driving disc 301 rotates reversely, the hollow sleeve 300 drives the detection rod 303 to withdraw from the internal threaded hole of the rivet nut 50, and the lifting device 4 drives the detection device 3 to move upwards for resetting.
Fourth, according to the deformation amount of the spiral spring 302, whether the corresponding internal thread quality of the rivet nut 50 is qualified is judged, the clamping of the clamping piece 21 on the rivet nut 50 is relieved, the detected rivet nut 50 is taken out, and the qualified and unqualified rivet nuts 50 are classified and stored.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the embodiments are to be considered in all respects as illustrative and not restrictive.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. The utility model provides a rivet nut assembly precision detection device, includes foundation slab (1), its characterized in that still includes:
the clamping device (2) is assembled on the foundation base plate (1), the clamping device (2) comprises two groups of clamping side plates (20), and a plurality of clamping pieces (21) are arranged between the two groups of clamping side plates (20);
The detection device (3) is arranged above the clamping device (2), the detection device (3) comprises a plurality of groups of hollow sleeves (300) which are in one-to-one correspondence with the clamping pieces (21), a driving disc (301) is sleeved outside the hollow sleeves (300), a spiral spring (302) is arranged between the hollow sleeves (300) and the driving disc (301), the spiral spring (302) drives the hollow sleeves (300) to rotate when the driving disc (301) rotates, and a detection rod (303) is arranged in the hollow sleeves (300) in a sliding mode;
the lifting device (4) is assembled on the foundation base plate (1) and positioned on one side of the clamping device (2), and the detection device (3) is assembled on the lifting device (4).
2. The device for detecting the assembly accuracy of the rivet nut according to claim 1, wherein the detecting device (3) further comprises a transverse mounting plate (30), a driving ring (304) is mounted at the upper end of the driving plate (301), the driving ring (304) is rotatably mounted at the bottom of the transverse mounting plate (30), all the driving rings (304) are connected through belt transmission, a protective shell (305) is mounted at the lower end of the driving plate (301), and the spiral spring (302) is arranged in the protective shell (305).
3. The device for detecting the assembly accuracy of the rivet nut according to claim 1, wherein one end of the spiral spring (302) is installed on the hollow sleeve (300), the other end of the spiral spring is installed on the supporting cylinder (306), a sliding block (307) is arranged at one end, facing the driving disc (301), of the supporting cylinder (306), a sliding groove (308) is formed in the driving disc (301) in the radial direction, and the sliding block (307) is installed in the sliding groove (308) and slides in the sliding groove (308).
4. The rivet nut assembly accuracy detection device according to claim 3, wherein the driving disc (301) is provided with a plurality of sliding grooves (308), the sliding grooves (308) are circumferentially distributed on the driving disc (301) at equal intervals, the distances from one end, close to the edge of the driving disc (301), of each sliding groove (308) to the hollow sleeve (300) are different, and one side of each sliding groove (308) is provided with a scale bar (309).
5. A rivet nut assembly accuracy detecting device according to claim 3, wherein a displacement sensor (310) is provided on a side of the support cylinder (306) facing the hollow sleeve (300).
6. The device for detecting the assembly accuracy of the rivet nut according to claim 1, wherein the driving disc (301) is in transmission connection with the hollow sleeve (300) through a ratchet pawl, the driving disc (301) rotates positively and drives the hollow sleeve (300) to rotate positively through the spiral spring (302) when detecting, the ratchet pawl does not work, the driving disc (301) rotates reversely and drives the hollow sleeve (300) to rotate reversely through the ratchet pawl when resetting, and the spiral spring (302) does not work.
7. The rivet nut assembly accuracy detection device according to claim 2, wherein the bottom of the detection rod (303) is connected with a detection screw (311), the top of the detection rod (303) is connected with an extension rod (313) in a threaded manner, and a rod cap (314) is arranged on the top of the extension rod (313).
8. The device for detecting the assembly accuracy of the rivet nut according to claim 7, wherein a through hole is formed in the position, corresponding to the hollow sleeve (300), of the transverse mounting plate (30), a mounting sleeve (315) is mounted on the through hole, a cylinder cover (316) is mounted on the top of the mounting sleeve (315), a rotating shaft (317) is rotatably arranged in the middle of the cylinder cover (316) in a penetrating mode, and an electromagnet (318) is mounted below the cylinder cover (316) at the lower end of the rotating shaft (317).
9. The device for detecting the assembly accuracy of the rivet nut according to claim 8, wherein the outer side wall of the rod cap (314) is rotatably provided with a pre-pressing plate (319), the top of the cylinder cover (316) is provided with an elastic telescopic rod (320), and the telescopic end of the elastic telescopic rod (320) gives the pre-pressing plate (319) a downward force when contacting with the pre-pressing plate (319).
10. A method for detecting the assembly precision of a rivet nut, which is characterized by comprising the following steps of:
firstly, placing a rivet nut to be detected on a clamping piece (21) so as to clamp the rivet nut between two groups of clamping side plates (20);
Secondly, the lifting device (4) drives the detection device (3) to move downwards so as to enable the detection rod (303) to be aligned with the internal threaded hole of the rivet nut, then drives the driving disc (301) to rotate, and under the action of the scroll spring (302), the hollow sleeve (300) drives the detection rod (303) to be screwed into the internal threaded hole of the rivet nut;
Thirdly, after detection is completed, the driving disc (301) rotates reversely, the hollow sleeve (300) drives the detection rod (303) to withdraw from the internal threaded hole of the rivet nut, and the lifting device (4) drives the detection device (3) to move upwards for resetting;
And fourthly, judging whether the internal thread quality of the rivet nut is qualified according to the deformation quantity of the scroll spring (302), simultaneously releasing the clamping of the clamping piece (21) on the rivet nut, and taking out the detected rivet nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510352690.5A CN119983980B (en) | 2025-03-25 | 2025-03-25 | Rivet nut assembly accuracy detection device and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510352690.5A CN119983980B (en) | 2025-03-25 | 2025-03-25 | Rivet nut assembly accuracy detection device and detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN119983980A true CN119983980A (en) | 2025-05-13 |
| CN119983980B CN119983980B (en) | 2025-10-21 |
Family
ID=95640887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202510352690.5A Active CN119983980B (en) | 2025-03-25 | 2025-03-25 | Rivet nut assembly accuracy detection device and detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119983980B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620626A (en) * | 2012-03-23 | 2012-08-01 | 常熟市平冶机械有限公司 | Rapid thread detector |
| CN106091860A (en) * | 2016-05-31 | 2016-11-09 | 安徽科技学院 | Forging and stamping automatic production line screw thread on-line measuring device |
| CN108007298A (en) * | 2017-12-22 | 2018-05-08 | 芜湖全程智能科技有限公司 | A kind of thread measurement platform |
| CN110440663A (en) * | 2019-08-06 | 2019-11-12 | 海克斯康测量技术(青岛)有限公司 | A kind of thread measurement equipment and screw thread measurement method |
| CN210374855U (en) * | 2019-08-06 | 2020-04-21 | 海克斯康测量技术(青岛)有限公司 | Automatic thread measuring device |
| CN211953914U (en) * | 2019-11-29 | 2020-11-17 | 上海岳展精密科技有限公司 | Automatic thread go-stop detection equipment |
| US20210239446A1 (en) * | 2020-02-03 | 2021-08-05 | National Sun Yat-Sen University | Automatic nut internal thread quality tester |
| CN215603717U (en) * | 2021-08-27 | 2022-01-25 | 黄山市华特电器有限公司 | Easy-to-detach brushless motor shell suitable for electric hair drier |
| CN220941932U (en) * | 2023-08-31 | 2024-05-14 | 温州顺远标准件有限公司 | Nut internal thread verifying attachment |
| CN220982655U (en) * | 2023-10-08 | 2024-05-17 | 菁品科技(韶关)有限公司 | Lead screw nut defect detection device |
| CN118758812A (en) * | 2024-07-26 | 2024-10-11 | 贝威斯(广州)智能科技研究院有限公司 | A rotational viscosity tester |
-
2025
- 2025-03-25 CN CN202510352690.5A patent/CN119983980B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620626A (en) * | 2012-03-23 | 2012-08-01 | 常熟市平冶机械有限公司 | Rapid thread detector |
| CN106091860A (en) * | 2016-05-31 | 2016-11-09 | 安徽科技学院 | Forging and stamping automatic production line screw thread on-line measuring device |
| CN108007298A (en) * | 2017-12-22 | 2018-05-08 | 芜湖全程智能科技有限公司 | A kind of thread measurement platform |
| CN110440663A (en) * | 2019-08-06 | 2019-11-12 | 海克斯康测量技术(青岛)有限公司 | A kind of thread measurement equipment and screw thread measurement method |
| CN210374855U (en) * | 2019-08-06 | 2020-04-21 | 海克斯康测量技术(青岛)有限公司 | Automatic thread measuring device |
| CN211953914U (en) * | 2019-11-29 | 2020-11-17 | 上海岳展精密科技有限公司 | Automatic thread go-stop detection equipment |
| US20210239446A1 (en) * | 2020-02-03 | 2021-08-05 | National Sun Yat-Sen University | Automatic nut internal thread quality tester |
| CN215603717U (en) * | 2021-08-27 | 2022-01-25 | 黄山市华特电器有限公司 | Easy-to-detach brushless motor shell suitable for electric hair drier |
| CN220941932U (en) * | 2023-08-31 | 2024-05-14 | 温州顺远标准件有限公司 | Nut internal thread verifying attachment |
| CN220982655U (en) * | 2023-10-08 | 2024-05-17 | 菁品科技(韶关)有限公司 | Lead screw nut defect detection device |
| CN118758812A (en) * | 2024-07-26 | 2024-10-11 | 贝威斯(广州)智能科技研究院有限公司 | A rotational viscosity tester |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119983980B (en) | 2025-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114412879B (en) | Hydraulic cylinder fatigue performance test equipment and test method | |
| CN203133252U (en) | Linear stepping motor test device | |
| CN109186843B (en) | Measuring device and method for researching influence of pressing force on torque coefficient | |
| CN106643621A (en) | Linear piston detection system | |
| CN105423864A (en) | Bearing axial clearance measuring device | |
| CN206132031U (en) | Orthoscopic piston detecting system | |
| CN104634682A (en) | Cylinder sleeve piston ring friction pair abrasion test machine | |
| CN119983980B (en) | Rivet nut assembly accuracy detection device and detection method | |
| CN205808825U (en) | A kind of electronics tensile and compression testing machine | |
| CN114323928B (en) | Universal testing machine with clamping function | |
| CN116465753A (en) | Anti-deformation detection device for alloy steel pipe production | |
| CN105842098A (en) | Friction-wear test work fixture | |
| CN114370831A (en) | A contact angle measuring device based on angular contact ball bearing assembly line | |
| CN112362372B (en) | A high-power linear servo loading device | |
| CN106768539A (en) | The biaxial loadings device and loading method of planetary roller screw pair | |
| CN110174207A (en) | A kind of high speed ball screw feeding test lead screw preload force checking device | |
| CN118759012B (en) | Device and method for monitoring and testing dynamic performance of lubricating grease for ball screw pair | |
| CN110595994A (en) | Method and device for measuring friction coefficient based on electronic universal tester | |
| CN119985105A (en) | Anchor pull-out test device based on new grouting material | |
| CN102359909A (en) | Non-uniform pressure loading device suitable for precision machinery contact model tests | |
| CN106226230A (en) | A kind of machinery loading device of ball-on-disk film tester | |
| CN114370799B (en) | Spring pressure and height detection method | |
| CN104422881A (en) | A pressing device for switch life test | |
| CN212340506U (en) | Main and auxiliary gear friction torque testing device of anti-backlash gear | |
| CN111337653B (en) | Resistance method double-point contact friction analyzer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |