CN215333850U - Anti-vibration fastening bolt - Google Patents
Anti-vibration fastening bolt Download PDFInfo
- Publication number
- CN215333850U CN215333850U CN202120317391.5U CN202120317391U CN215333850U CN 215333850 U CN215333850 U CN 215333850U CN 202120317391 U CN202120317391 U CN 202120317391U CN 215333850 U CN215333850 U CN 215333850U
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- nut
- thread section
- vibration
- fastening bolt
- reducing
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- 230000007704 transition Effects 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 13
- 206010003549 asthenia Diseases 0.000 abstract description 4
- 239000011435 rock Substances 0.000 abstract description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a vibration-proof fastening bolt which comprises a reducing screw rod, wherein the reducing screw rod comprises a first thread section and a second thread section which are opposite in thread direction, and a reducing transition section is arranged between the first thread section and the second thread section; the first screw thread section is matched with a first nut, the second screw thread section is matched with a second nut, and the first nut and the second nut are respectively connected with the double-nut sleeve in a nested mode. The utility model solves the problem that the fastening bolt is easy to loosen and lose efficacy under the high-frequency vibration load generated by impact drilling of the drilling equipment on the rock slope, can effectively improve the anti-vibration capability of the bolt for the impact drilling equipment, reduce the strength loss of the screw rod, enhance the durability of the bolt, and has wide application prospect and obvious economic and social benefits.
Description
Technical Field
The utility model belongs to the field of member fastening, particularly relates to a vibration-proof fastening bolt, and particularly relates to a vibration-proof fastening bolt for drilling equipment.
Background
Bolt connection is a common fastening mode in daily life, and relates to the aspect in production life, but in some special working environments, conventional bolts can not meet the fastening requirements of equipment, for example, the fastening bolts are easy to loosen and fail under the high-frequency vibration load generated by rock-soil anchoring drilling equipment in rock slope impact drilling.
Nowadays, various vibration-proof bolts are available on the market, but most of them cannot solve the problem of loose bolt vibration of impact drilling equipment, or the bolt strength is reduced after the vibration-proof performance is increased. Some ideas on the design of anti-vibration bolts are good but cannot be realized at all based on the prior art.
The applicant has searched the following relevant documents: CN 108061091A discloses a bolt anti-loose locking method and a bolt never loose, the above technology provides a double-nut reverse-buckling locking method, but the screw design of the double-nut reverse-buckling locking method causes stress concentration due to abrupt change of the rod diameter, thereby reducing the strength of the screw. On the other hand, the designed nut contact surface can rotate relatively, and the double nuts cannot be locked completely, so that the fastening performance of the bolt is reduced.
Disclosure of Invention
In view of the above-described problems, the present invention is directed to a method of fastening a vibration-proof fastening bolt.
The technical scheme adopted by the utility model is as follows:
a vibration-proof fastening bolt comprises a reducing screw rod, wherein the reducing screw rod comprises a first thread section and a second thread section which are opposite in thread direction, and a reducing transition section is arranged between the first thread section and the second thread section; the first thread section is matched with a first nut (the first nut is matched with the thread of the first thread section), the second thread section is matched with a second nut (the second nut is matched with the thread of the second thread section), the first nut and the second nut are respectively connected with the double-nut sleeve in a nested mode, and the first nut and the second nut are connected into a whole through the double-nut sleeve.
Be equipped with the composite pad piece between first nut and the second nut, the in-process of fastening the second nut extrudees the composite pad piece to produce the extrusion to first nut, prevent that first nut is not hard up.
The diameter of the first thread section is larger than that of the second thread section, and the first nut freely penetrates through the second thread section.
The length of the reducing transition section is 1-3 times of the diameter of the second thread section, stress concentration is easy to occur when the length of the reducing transition section is too short, and material waste is easy to cause when the length of the reducing transition section is too long. Further, the length of the reducing transition section is 1 time of the diameter of the second thread section.
The thickness of the combined gasket is greater than or equal to the length of the variable-diameter transition section, and when the thickness of the combined gasket is greater than the length of the variable-diameter transition section, the combined gasket is connected with the first thread section, the second thread section and the variable-diameter transition section in a nested mode; when the thickness of the combined gasket is equal to the length of the reducing transition section, the combined gasket is connected with the reducing transition section in a nested mode.
The diameter of the combined gasket is smaller than or equal to the diameter of an inscribed circle of the outer profile hexagon of the second nut.
The inner part of the double-nut sleeve is of a reducing type, the inner outline hexagon of the front end of the double-nut sleeve is matched with the outer outline hexagon of the first nut, and the inner outline of the rear end hexagon of the double-nut sleeve is matched with the outer outline hexagon of the second nut in external diameter.
In order to better fix the sleeve, the inner surface of the double-nut sleeve is provided with a layer of rubber pad.
Preferably, both ends of the reducing screw rod are provided with a first thread section and a second thread section with opposite thread directions.
The utility model has the beneficial effects that:
(1) and the vibration resistance of the bolt is improved. The anti-thread double-buckle locking system can effectively prevent the bolt from loosening and losing efficacy under the action of high-frequency vibration load, greatly improves the anti-vibration performance of the bolt, and realizes that the bolt never loosens under the action of vibration load.
(2) The strength loss of the screw is reduced. Stress transmission law has fully been considered in the design of reducing changeover portion, thereby has evaded the stress concentration that the structural shape sudden change caused and has reduced screw rod intensity, has realized that screw rod reducing in-process reduces screw rod intensity to the minimum.
(3) And the durability of the bolt is enhanced. The reverse thread design of the screw rod realizes the locking of the double nuts, and the locking of the double nuts is fundamentally characterized in that the rotation of the double nuts is synchronous (the thread of the bolt is reverse, and the synchronous rotation of the two nuts cannot be realized inevitably, so that the locking purpose is achieved), and the double nut sleeve exerts constraint on the two nuts, so that the two nuts cannot rotate relatively, and the locking is realized and the performance of never loosening is realized. In addition, the durability of the nut also seriously influences the anti-seismic performance of the bolt, and the double-nut sleeve plays an effective protection role for the nut.
(4) The combined gasket enables each nut to be associated with the second nut, and after the second nuts are fastened, the combined gasket is extruded, so that the first nuts are extruded, and the first nuts are effectively prevented from loosening. Under the high-frequency vibration, the extrusion effect between the first nut and the second nut enables friction force to be generated between the combined gaskets, and the friction force can effectively weaken the shearing force effect of the vibration load on the variable-diameter transition.
(5) The utility model solves the problem that the fastening bolt is easy to loosen and lose efficacy under the high-frequency vibration load generated by impact drilling of the drilling equipment on the rock slope, can effectively improve the anti-vibration capability of the bolt for the impact drilling equipment, reduce the strength loss of the screw rod, enhance the durability of the bolt, and has wide application prospect and obvious economic and social benefits.
Drawings
FIG. 1 is a schematic view of example 1 of the present invention;
FIG. 2 is an exploded view of embodiment 1 of the present invention;
FIG. 3 is a schematic view of example 2 of the present invention;
FIG. 4 is an exploded view of embodiment 2 of the present invention;
FIG. 5 is a schematic view of a double nut sleeve;
wherein, 1, an object; 2. a bolt head; 3. a variable diameter screw; 301. a smooth screw section; 302. a first thread segment; 303. a variable diameter transition section; 304. a second thread segment; 4. a first nut; 5. a second nut; 6. combining the gaskets; 7. a double nut sleeve.
Detailed Description
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "longitudinal," "transverse," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.
Example 1
As shown in fig. 1-2 and 5, an anti-vibration fastening bolt comprises a bolt head 2 and a reducing screw rod 3, wherein the reducing screw rod 3 comprises a first thread section 302 and a second thread section 304 with opposite thread directions, and a reducing transition section 303 is arranged between the first thread section 302 and the second thread section 304; the first thread section 302 is matched with a first nut 4, the second thread section 304 is matched with a second nut 5, a combined gasket 6 is arranged between the first nut 4 and the second nut 5, the first nut 5 and the second nut 6 are respectively connected with the double-nut sleeve 7 in a nested manner and are connected into a whole through the double-nut sleeve 7, the diameter of the first thread section 302 is larger than that of the second thread section 304, the first nut 4 freely passes through the second thread section 304, the length of the reducing transition section 303 is 1 time of that of the second thread section 304, the thickness of the combined gasket 6 is larger than that of the reducing transition section 303, the combined gasket 6 is connected with the first thread section 302, the second thread section 304 and the reducing transition section 303 in a nested manner, the diameter of the combined gasket 6 is smaller than or equal to the diameter of an inner tangent circle of the hexagon of the outer contour of the second nut 5, so that the double-nut sleeve 7 can be sleeved on the gasket, the inner part of the double-nut sleeve 7 is of a reducing type, an inner outline hexagon at the front end of the double-nut sleeve 7 is matched with an outer outline hexagon of a first nut, an inner outline hexagon at the rear end of the double-nut sleeve is matched with the outer diameter of an outer outline hexagon of a second nut, and a layer of rubber pad is arranged on the inner surface of the double-nut sleeve 7.
The fastening method of the vibration-proof fastening bolt includes the steps of:
the first step is as follows: the reducing screw rod 3 penetrates through a reserved hole of the object 1 and is screwed with the first nut 4, and a combined gasket 6 with proper thickness is selected and installed according to the residual length of the first thread section 302 and the length of the reducing transition section 303;
the second step is that: the second nut 5 is fastened to enable the sides of the first nut 4 and the second nut 5 to be in a parallel state, and in the process of fastening the second nut 5, the second nut 5 extrudes the combined gasket 6 and extrudes the first nut 4;
the third step: a double nut sleeve 7 is installed and fixed.
The principle is that the thread directions of the first thread section 302 and the second thread section 304 are opposite, when the first nut 4 and the second nut 5 rotate in the same direction, the first nut 4 rotates outwards to have a loosening trend, and the second nut 5 rotates outwards to have a fastening trend, so that double-nut reverse buckling locking is realized.
Example 2
The fastening method of the bidirectional vibration-proof fastening bolt includes the steps of:
the first step is as follows: the reducing screw 3 penetrates through the reserved hole of the object and is screwed tightly with first nuts at two ends of the reducing screw 3, and a combined gasket 6 with proper thickness is selected and installed according to the residual length of the first thread section 302 and the length of the reducing transition section 303 of the screw;
the second step is that: and (3) fastening the second nuts 5 at the two ends of the screw rod to enable the sides of the first nut 4 and the second nut 5 to be in a parallel state, and in the process of fastening the second nuts 5 at the two ends of the screw rod, extruding the combined gasket 6 by the second nuts 5 and generating an extruding effect on the first nut 4.
The third step: double nut sleeves 7 at two ends of the screw are installed and fixed.
The utility model solves the problem that the fastening bolt is easy to loosen and lose efficacy under the high-frequency vibration load generated by impact drilling of the drilling equipment on the rock slope, can effectively improve the anti-vibration capability of the bolt for the impact drilling equipment, reduce the strength loss of the screw rod, enhance the durability of the bolt, and has wide application prospect and obvious economic and social benefits.
Claims (9)
1. A vibration-proof fastening bolt characterized in that: the anti-vibration fastening bolt comprises a reducing screw rod (3), the reducing screw rod (3) comprises a first thread section (302) and a second thread section (304) which are opposite in thread direction, and a reducing transition section (303) is arranged between the first thread section (302) and the second thread section (304); the first screw thread section (302) is matched with a first nut (4), the second screw thread section (304) is matched with a second nut (5), the first nut (4) and the second nut (5) are respectively connected with the double-nut sleeve (7) in a nested mode, and the first nut and the second nut are connected into a whole through the double-nut sleeve (7).
2. A vibration-proof fastening bolt as defined in claim 1, wherein: be equipped with combination gasket (6) between first nut (4) and second nut (5), the in-process of fastening second nut (5), extrusion combination gasket (6) to produce the squeezing action to first nut (4), prevent that first nut (4) are not hard up.
3. A vibration-proof fastening bolt as defined in claim 1, wherein: the diameter of the first thread section (302) is larger than that of the second thread section (304), and the first nut (4) freely passes through the second thread section (304).
4. A vibration-proof fastening bolt as defined in claim 1, wherein: the length of the reducing transition section (303) is 1-3 times of the diameter of the second thread section (304).
5. A vibration-proof fastening bolt as defined in claim 2, wherein: the thickness of the combined gasket (6) is greater than or equal to the length of the screw diameter-changing transition section (303), and when the thickness of the combined gasket (6) is greater than the length of the diameter-changing transition section (303), the combined gasket (6) is connected with the first thread section (302), the second thread section (304) and the diameter-changing transition section (303) in a nested manner; when the thickness of the combined gasket (6) is equal to the length of the reducing transition section (303), the combined gasket (6) is connected with the reducing transition section (303) in a nested mode.
6. A vibration-proof fastening bolt as defined in claim 2, wherein: the diameter of the combined gasket (6) is smaller than or equal to the diameter of an inscribed circle of the outer profile hexagon of the second nut (5).
7. A vibration-proof fastening bolt as defined in claim 1, wherein: the inner part of the double-nut sleeve (7) is of a reducing type, the inner outline hexagon at the front end of the double-nut sleeve (7) is matched with the outer outline hexagon of the first nut (4), and the inner outline hexagon at the rear end of the double-nut sleeve (7) is matched with the outer outline hexagon of the second nut (5).
8. A vibration-proof type fastening bolt as defined in claim 1 or 7, wherein: the inner surface of the double-nut sleeve (7) is provided with a layer of rubber pad.
9. A vibration-proof fastening bolt as defined in claim 1, wherein: and a first thread section and a second thread section which are opposite in thread direction are arranged at two ends of the reducing screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120317391.5U CN215333850U (en) | 2021-02-04 | 2021-02-04 | Anti-vibration fastening bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120317391.5U CN215333850U (en) | 2021-02-04 | 2021-02-04 | Anti-vibration fastening bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215333850U true CN215333850U (en) | 2021-12-28 |
Family
ID=79580761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120317391.5U Expired - Fee Related CN215333850U (en) | 2021-02-04 | 2021-02-04 | Anti-vibration fastening bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215333850U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114197656A (en) * | 2021-12-31 | 2022-03-18 | 福州大学 | Anti-sliding detachable stainless steel bolt nail shear connector |
-
2021
- 2021-02-04 CN CN202120317391.5U patent/CN215333850U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114197656A (en) * | 2021-12-31 | 2022-03-18 | 福州大学 | Anti-sliding detachable stainless steel bolt nail shear connector |
| CN114197656B (en) * | 2021-12-31 | 2023-02-21 | 福州大学 | Anti-sliding detachable stainless steel bolt nail shear connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |