CN115452233B - Pretightening force detection device of threaded fastener - Google Patents
Pretightening force detection device of threaded fastener Download PDFInfo
- Publication number
- CN115452233B CN115452233B CN202210972126.XA CN202210972126A CN115452233B CN 115452233 B CN115452233 B CN 115452233B CN 202210972126 A CN202210972126 A CN 202210972126A CN 115452233 B CN115452233 B CN 115452233B
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- China
- Prior art keywords
- fixed ring
- ring
- rotating ring
- annular
- buckles
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- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 239000011888 foil Substances 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 description 6
- 238000007790 scraping Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
- G01L5/243—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed using washers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a pretightening force detection device of a threaded fastener, which comprises an annular base, an annular strain gauge, a fixed ring and a rotating ring, wherein the annular base is provided with a plurality of grooves; the annular strain gauge is arranged between the annular base and the fixed ring in a clamping way; the rotating ring is arranged above the fixed ring and is rotatably connected with the fixed ring; the top of the fixed ring is also uniformly provided with a plurality of balls, and the bottom surface of the rotating ring is contacted with the balls. The invention has the advantages of novel design, simple structure, convenient detection, abrasion resistance and suitability for threaded fasteners of different specifications.
Description
Technical Field
The invention relates to the technical field of threaded fastener detection, in particular to a pretightening force detection device of a threaded fastener.
Background
In the threaded connection scene, the pretightening force of the threaded fastener is an important assembly index, and the pretightening force is directly related to the sealing, electric conduction, heat conduction and other performances of a product, and also determines the anti-loosening, anti-fatigue and other capacities of the fastener, so that the pretightening force in the bolt connection is ensured to meet the requirements.
In the prior art, most of the pretightening force of the threaded fastener is calculated theoretically according to parameters and materials of the part, only a very wide value can be obtained, actual use requirements are difficult to meet, and the accurate measurement and calculation are generally realized by special equipment in a laboratory, so that certain adverse effects are caused on actual construction and operation.
Although some detection devices which can be applied to actual operation scenes appear in the market at present, most of the detection devices are complex in structure and heavy in equipment, one detection device can only correspond to a threaded fastener with one specification, the application range is small, meanwhile, when the existing detection device is used, the threaded fastener is directly scraped at the top end of a detector in a rotating way, scratches are caused on the top end of the detector, abrasion is aggravated, and the service life is short.
Based on the method, the pretightening force detection device of the threaded fastener with small damage and long service life is designed, and the pretightening force detection device has wide application prospect.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a pretightening force detection device of a threaded fastener, which has the advantages of convenient detection, abrasion resistance and suitability for threaded fasteners of different specifications.
(II) technical scheme
In order to achieve the purposes of convenient detection, wear resistance and suitability for threaded fasteners of different specifications, the invention provides the following technical scheme:
the pretightening force detection device of the threaded fastener is characterized by comprising an annular base, an annular strain gauge, a fixed ring and a rotary ring; wherein,,
a fixed ring is connected above the annular base, and the annular strain gauge is clamped between the annular base and the fixed ring;
the rotating ring is arranged above the fixed ring and is rotatably connected with the fixed ring; the top of the fixed ring is also uniformly provided with a plurality of balls, and the bottom surface of the rotating ring is contacted with the balls.
As a preferable technical scheme of the invention, a plurality of first buckles are uniformly arranged at the bottom of the fixed ring, a plurality of first clamping grooves which are coupled with the first buckles in a one-to-one correspondence manner are uniformly formed in the inner wall of the annular base, and the annular base is detachably connected with the fixed ring through the buckling of the first buckles and the first clamping grooves.
As a preferable technical scheme of the invention, a plurality of second buckles are uniformly arranged at the bottom of the rotary ring, an annular second clamping groove which is coupled with the second buckles is formed in the inner wall of the fixed ring, and the rotary ring is rotatably and detachably connected with the fixed ring through buckling of the second buckles and the second clamping groove.
As a preferable technical scheme of the invention, a plurality of slots which are penetrated along the radial direction are formed in the rotating ring, each slot is internally provided with a butt strap, the butt strap can move along the radial direction of the rotating ring, and the tail end of the butt strap is fixedly provided with a tail strap. As a preferable embodiment of the present invention, the slot is located at an upper middle portion of the rotating ring.
As a preferable technical scheme of the invention, the surface of the annular base is also fixedly provided with a controller and a display screen, the output end of the annular strain gauge is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the input end of the display screen.
As a preferable technical scheme of the invention, a rubber pad is fixedly arranged at the top of the rotary ring.
(III) beneficial effects
Compared with the prior art, the invention provides a pretightening force detection device of a threaded fastener, which has the following beneficial effects:
1. this screw fastener's pretightning force detection device, during the use, insert the detector with the bolt from the detector top in, the nut of bolt is taken on the swivel ring, the bolt passes the detector and needs the work piece of connecting and tightly with the nut cover, screw the bolt gradually, the foil gage can feel pressure, the foil gage produces the deformation because of pressure, the resistance produces the change, and then the electric current in the circuit changes, processing module calculates the pressure size and demonstrate on the display screen according to the electric current size, it is convenient to detect, it is high-efficient convenient.
2. According to the pretightening force detection device of the threaded fastener, the rotating ring rotates at the top of the fixed ring, and the rotating ring is enabled to be more stable and smooth through the balls, so that the direct rotary scraping of the fixed ring and the strain gauge is avoided, the equipment loss is obviously reduced, and the service lives of the strain gauge and the whole device are greatly prolonged.
3. This screw fastener's pretightning force detection device, the activity is inserted on the swivel joint and is equipped with a plurality of strap, when detecting the screw fastener of little specification, can push the strap into the swivel joint in, reduces the internal diameter of swivel joint to can detect the screw fastener of little specification promptly, application scope is wider.
4. This screw fastener's pretightning force detection device can dismantle through first buckle and first draw-in groove between base and the solid fixed ring and be connected, can dismantle through second buckle and annular second draw-in groove between solid fixed ring and the rotatory ring and be connected, detachable design between each subassembly, can change alone after the single part damages, has further improved the life of equipment.
Drawings
FIG. 1 is a schematic perspective view of the overall structure of the present invention;
FIG. 2 is an exploded view of the overall structure of the present invention;
fig. 3 is a cross-sectional view of the overall structure of the present invention.
In the figure: 1. an annular base; 2. a display screen; 3. a controller; 4. an annular strain gage; 5. a fixing ring; 6. a first buckle; 7. a clamping groove; 8. a ball; 9. a rotating ring; 10. a second buckle; 11. an annular groove; 12. a rubber pad; 13. a butt strap; 14. and a tail plate.
Detailed Description
Examples:
referring to fig. 1-3, a pretightening force detection device of a threaded fastener comprises an annular base 1, a fixing ring 5 is detachably arranged above the annular base 1, an annular strain gauge 4 is clamped between the annular base 1 and the fixing ring 5, as shown in fig. 2, a plurality of first buckles 6 are uniformly arranged at the bottom of the fixing ring 5, a plurality of first clamping grooves 7 which are coupled with the first buckles 6 in a one-to-one correspondence manner are uniformly formed in the inner wall of the annular base 1, and the annular base 1 and the fixing ring 5 can be buckled and connected through the clamping of the first buckles 6 in the first clamping grooves 7, and meanwhile, the annular base 1 and the fixing ring 5 can be prevented from rotating relatively;
as shown in fig. 3, a rotating ring 9 is rotatably arranged above the fixed ring 5, balls 8 are uniformly arranged at the top of the fixed ring 5, when the detector is used, bolts are inserted into the detector from the top end of the detector, nuts of the bolts are lapped on the rotating ring 9, the bolts penetrate through the detector and workpieces to be connected and are sleeved tightly by the nuts, the bolts are gradually screwed, the strain gauge 4 senses pressure, the rotating ring 9 rotates at the top of the fixed ring 5, the rotation is more stable and smooth through the balls 8, the direct rotary scraping of the nuts on the fixed ring 5 and the strain gauge 4 is avoided, the equipment loss is obviously reduced, and the service lives of the strain gauge 4 and the whole device are greatly prolonged;
in this embodiment, the bottom of the first clamping groove 7 is provided with a deeper depth, so that the first buckle 6 can continuously move downwards in the first clamping groove 7 after being clamped, and the pressure of the strain gauge 4 corresponding to the fixing ring 5 is further adapted;
as shown in fig. 3, a plurality of second buckles 10 are uniformly arranged at the bottom of the rotating ring 9, an annular second clamping groove 11 coupled with the second buckles 10 is formed in the inner wall of the fixed ring 5, the fixed ring 5 and the rotating ring 9 can be connected through clamping of the second buckles 10 in the annular second clamping groove 11, and meanwhile, the rotating ring 9 can also rotate on the fixed ring 5 because the groove for limiting the second buckles 10 is an annular clamping groove;
in the embodiment, the annular base 1 is detachably connected with the fixed ring 5 through the first buckle 6, the fixed ring 5 is detachably connected with the rotary ring 9 through the second buckle 10, the components are detachably designed, and the single part can be independently replaced after being damaged, so that the service life of the equipment is further prolonged;
the rotating ring 9 is provided with a plurality of (say 3-5) slots penetrating in the radial direction, each slot is uniformly and movably inserted with a matched strap 13, the slots are in interference fit with the straps, tail ends of the straps 13 are fixedly provided with tail plates 14, when small-size threaded fasteners are detected, the straps 13 can be conveniently pushed into the rotating ring 9 through the tail plates 14, the inner diameter of the rotating ring 9 is reduced, so that the small-size threaded fasteners can be detected, the application range is wider, and in order to prevent nuts from extending into the rotating ring 9 too much, in the embodiment, the straps 13 are inserted in positions relatively higher than the rotating ring 9;
in the embodiment, rubber pads 12 are fixedly arranged at the top of the rotating ring 9 and the top of the access plate 13, so that a buffering effect is achieved, abrasion is further reduced, and the service life is prolonged;
the surface of annular base 1 still fixed mounting has controller 3 and display screen 2, the output of foil gage 4 and the input electric connection of controller 3, be provided with the battery in the controller 3 and the input electric connection of display screen 2, circuit board and processing module, during the use, insert the detector with the bolt from the top, the nut of bolt is taken on swivel ring 9, the bottom runs through the work piece that needs to be connected and is tightly with the nut cover, screw the bolt gradually, foil gage 4 can feel pressure promptly, foil gage 4 warp because of pressure, resistance produces the change, and then the electric current in the circuit changes, processing module calculates pressure size and show on display screen 2 according to the electric current size, it is convenient to detect, it is high-efficient convenient.
The working principle and the using flow of the invention are as follows:
when the detector is used, a bolt is inserted into the detector from the top end, a nut of the bolt is put on the rotating ring 9, the bolt passes through the detector and a workpiece to be connected and is sleeved tightly by the nut, the bolt is gradually screwed, the strain gauge 4 can sense pressure, the strain gauge 4 deforms due to the pressure and changes in resistance, and then the current in a circuit changes, and the processing module calculates the pressure according to the current and displays the pressure on the display screen 2, so that the detector is convenient to detect and high-efficiency and convenient;
the rotating ring 9 rotates at the top of the fixed ring 5, and the rotation is more stable and smooth through the balls 8, so that the direct rotary scraping of the fixed ring 5 and the strain gauge 4 is avoided, the equipment loss is obviously reduced, and the service lives of the strain gauge 4 and the whole device are greatly prolonged;
a plurality of access plates 13 are movably inserted on the rotating ring 9, when detecting the small-size threaded fasteners, the access plates 13 can be pushed into the rotating ring 9 to reduce the inner diameter of the rotating ring 9, so that the small-size threaded fasteners can be detected, and the application range is wider;
the annular base 1 is detachably connected with the fixed ring 5 through the first buckle 6, the fixed ring 5 is detachably connected with the rotating ring 9 through the second buckle 10, the detachable design among the components is realized, and the single part can be independently replaced after being damaged, so that the service life of the equipment is further prolonged.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. The pretightening force detection device of the threaded fastener is characterized by comprising an annular base, an annular strain gauge, a fixed ring and a rotary ring; wherein,,
a fixed ring is connected above the annular base, and the annular strain gauge is clamped between the annular base and the fixed ring;
the rotating ring is arranged above the fixed ring and is rotatably connected with the fixed ring; the top of the fixed ring is also uniformly provided with a plurality of balls, and the bottom surface of the rotating ring is contacted with the balls;
the bottom of the fixed ring is uniformly provided with a plurality of first buckles, the inner wall of the annular base is uniformly provided with a plurality of first clamping grooves which are coupled with the first buckles in a one-to-one correspondence manner, and the annular base is detachably connected with the fixed ring through the buckling of the first buckles and the first clamping grooves;
the bottom of the rotating ring is uniformly provided with a plurality of second buckles, the inner wall of the fixed ring is provided with an annular second clamping groove which is coupled with the second buckles, and the rotating ring is rotatably and detachably connected with the fixed ring through the buckling of the second buckles and the second clamping groove;
a plurality of slots which are penetrated in the radial direction are formed in the rotating ring, each slot is internally provided with a butt strap, the butt strap can move along the radial direction inside and outside of the rotating ring, and the tail end of the butt strap is fixedly provided with a tail plate; the slot is positioned at the middle upper part of the rotating ring.
2. The device for detecting the pretightening force of a threaded fastener according to claim 1, wherein: the surface of annular base still fixed mounting has controller and display screen, the output of annular foil gage and the input electric connection of controller, the output of controller and the input electric connection of display screen.
3. The device for detecting the pretightening force of a threaded fastener according to claim 1, wherein: the top of the rotating ring is fixedly provided with a rubber pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210972126.XA CN115452233B (en) | 2022-08-15 | 2022-08-15 | Pretightening force detection device of threaded fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210972126.XA CN115452233B (en) | 2022-08-15 | 2022-08-15 | Pretightening force detection device of threaded fastener |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115452233A CN115452233A (en) | 2022-12-09 |
| CN115452233B true CN115452233B (en) | 2023-10-24 |
Family
ID=84299333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210972126.XA Active CN115452233B (en) | 2022-08-15 | 2022-08-15 | Pretightening force detection device of threaded fastener |
Country Status (1)
| Country | Link |
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| CN (1) | CN115452233B (en) |
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| CN115452233A (en) | 2022-12-09 |
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