CN205013477U - Outer threaded fastener and screw fastening structure - Google Patents
Outer threaded fastener and screw fastening structure Download PDFInfo
- Publication number
- CN205013477U CN205013477U CN201520813044.6U CN201520813044U CN205013477U CN 205013477 U CN205013477 U CN 205013477U CN 201520813044 U CN201520813044 U CN 201520813044U CN 205013477 U CN205013477 U CN 205013477U
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- CN
- China
- Prior art keywords
- male fastener
- threaded male
- tooth
- root
- threaded fastener
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- Expired - Fee Related
Links
- 239000011241 protective layer Substances 0.000 claims description 15
- 239000004519 grease Substances 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 abstract 1
- 235000011613 Pinus brutia Nutrition 0.000 abstract 1
- 241000018646 Pinus brutia Species 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000010030 laminating Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 210000002445 nipple Anatomy 0.000 description 4
- 230000002040 relaxant effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Lubricants (AREA)
Abstract
The utility model discloses an outer threaded fastener and screw fastening structure, it improves the distance of root of the tooth contained angle and crest and root of the tooth on the basis of standard external screw thread for the side laminating of external screw thread among the internal thread of outer threaded fastener internal thread spare in the fastening structure with internal thread spare side and the outer threaded fastener, and the crest of internal thread spare laminates with outer threaded fastener's root of the tooth, thus improved the ability of loosening of screw effectively. On using the pressure boosting type engine that the vibration is big, operation ambient temperature is high with this outer threaded fastener and fastening structure, can guarantee leakproofness of each installation face, make that difficult pine takes off between each spare part, and outer threaded fastener and the easily dismouting of internal thread spare, can use repeatedly, improved the convenience that keeps in repair.
Description
Technical field
The utility model belongs to link field, particularly a kind of threaded male fastener and fastening structure.
Background technique
For realizing Engine Downsizing, high power, low oil consumption, supercharging technology is extensive use on the engine.Compared with natural aspiration type, the delivery temperature of supercharging type is higher, and generally most high exhaust temperature can reach 950 DEG C.Current gas exhaust manifold with between cylinder cap, between gas exhaust manifold with turbosupercharger, turbosupercharger all adopts clamping bolt to be connected with one stage catalyzing device assembly, thus the waste gas of discharging after can preventing engine combustion leaks from these junction planes, avoid affecting the power character of motor, Economy and emission performance.
Because supercharging type exhaust side temperature is high, vibration large, clamping bolt easily loosens (as shown in Figure 1, there is the first gap 101 internal thread root of the tooth and outside thread crest cooperation place, there is the second gap 102 in internal thread crest and outside thread root of the tooth, owing to there is gap, the contact of nut and stud locking face 103 is less, frictional force is not enough, under the environment of high-temperature vibrating, easy generation loosens), locking design generally can be adopted to prevent bolt looseness, and anti-loose structure conventional at present has the following two kinds:
One is that nut flange face is designed to toothed structure, and the nut of this structure can increase the frictional force of junction plane, effectively prevents nut from occurring to loosen under high-temperature vibrating environment.
Another kind is that the mode being adopted by nipple heads 2 points (become 180 °) or 3 points (become 120 °) to be out of shape at 2 at 3 prevents nut loosening, after nipple heads Pressing Deformation, internal diameter diminishes, nut is in precession process, because the screw thread of head threads size comparison with standard is less than normal, head screw thread less than normal can destroy the structure of stud screw thread, and then plays locking effect.
Though flange surface toothed nut has certain effect to locking, but anti-loosing effect is poor, be with the planeness in toothing destructible mounting flange face simultaneously, if again installed after nut dismantles, because the planeness in mounting flange face is poor, such nut is different with when installing for the first time from the frictional force of flanged surface, same urgent moment, nut can produce different pretightening forces, and pretightening force difference can affect the sealing of junction plane.
The locking mode anti-loosing effect of nipple heads distortion is better, but in the process of precession, the structure of meeting heavy damage screw thread, causes nut to assemble by secondary again, bring larger difficulty to after sales service.
Because leading edge deformation is realized by punching press, the conformity of amount of deformation is uncontrollable, causes some nipple heads to be out of shape larger, minor diameter of thread is too small, cannot be urgent by nut by the moment of regulation, now must increase urgent moment, bring larger difficulty to production line assembling.
Model utility content
Technical problem to be solved in the utility model is to provide strong, easy to assemble, the repeatedly used threaded male fastener of a kind of relaxing serializability and fastening structure.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of threaded male fastener, the axial angle of its externally threaded root of the tooth and this threaded male fastener is between 0.3 ° ~ 0.6 °, and in rising trend along precession direction; Distance between described externally threaded crest and root of the tooth 0.05mm ~ 0.1mm less of the 5H/8 of standard.
Preferably, the axial angle of described externally threaded root of the tooth and this threaded male fastener is 0.5 °.
Preferably, the 0.08mm less of the 5H/8 of standard of the distance between described externally threaded crest and root of the tooth.
Preferably, described externally threaded surface is provided with break-in protective layer.
Preferably, described break-in protective layer is the break-in protective layer formed by solid lubricant.
Preferably, described break-in protective layer is the break-in protective layer formed by grease.
A kind of screw threads for fastening structure comprises inner thread piece and the threaded male fastener described in above-mentioned any one, this inner thread piece and described threaded male fastener are spirally connected, on precession direction, in described inner thread piece, in the side of internal thread and described threaded male fastener, fit in externally threaded side, and the root of the tooth of the crest of described inner thread piece and described threaded male fastener is fitted.
A kind of threaded male fastener provided by the utility model and screw threads for fastening structure, it is improved the distance of root of the tooth angle and crest and root of the tooth on the basis of standard external, threaded male fastener is being fitted with externally threaded side in the internal thread side and threaded male fastener of inner thread piece in the fastening structure of inner thread piece, and the root of the tooth of the crest of inner thread piece and threaded male fastener is fitted, thus effectively improve the relaxing serializability of screw thread.This threaded male fastener and fastening structure are applied to and vibrate on large, that operating environment temperature is high boosting type motor, the sealing of each attachment face can be guaranteed, make not easily to get loose between each component, and threaded male fastener and inner thread piece easy to assemble, can Reusability, improve the convenience of maintenance.
Accompanying drawing explanation
Fig. 1 is the part sectioned view of existing screw threads for fastening structure;
The part sectioned view of the threaded male fastener that Fig. 2 provides for the utility model embodiment;
The part sectioned view of the screw threads for fastening that Fig. 3 provides for the utility model embodiment.
In Fig. 1, reference character is: 101 first gaps, 102 second gaps, 103 locking faces.
In Fig. 2 and Fig. 3, reference character is: 1 outside thread, 2 internal threads.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
As shown in Figure 2, a kind of threaded male fastener, in its outside thread 1, p/8, p, a2, a3, d, d2, L3 and standard thread is measure-alike, the root of the tooth of outside thread 1 and the axial angle a1 of this threaded male fastener between 0.3 ° ~ 0.6 ° (in standard thread, a1 is 0 °), and in rising trend along precession direction; Distance L2 between the crest of this outside thread 1 and root of the tooth 0.05mm ~ 0.1mm less of the 5H/8 of standard.In the present embodiment, the root of the tooth of outside thread 1 and the axial angle a1 of this threaded male fastener are 0.5 °, the 0.08mm less of the 5H/8 of standard of the distance L2 between the crest of outside thread 1 and root of the tooth.Root of the tooth width L1 can calculate according to p and a1, and screw thread tooth base diameter d 1 can calculate according to d and L2.
In order to promote the wear resistance of threaded male fastener, preferably, the surface of outside thread 1 is provided with break-in protective layer.Further preferably, break-in protective layer is the break-in protective layer formed by solid lubricant.Break-in protective layer is the break-in protective layer formed by grease.
As shown in Figure 3, a kind of screw threads for fastening structure comprises inner thread piece and above-mentioned threaded male fastener, this inner thread piece and threaded male fastener are spirally connected, when nut precession, due to the thread size under gauge of L2 in threaded male fastener, under the effect of urgent moment, could coordinate with threaded male fastener after the extrusion-deformation of inner thread piece crest.Part as shown in circle in Fig. 3, is extruded in its precession process.Root of the tooth due to threaded male fastener has individual angle of inclination a1, inner thread piece is in precession process, and extruding unnecessary part can move in the opposite direction to precession side, and excess stock can be filled in below oblique angle, be beneficial to inner thread piece to tighten, be unlikely to inner thread piece in precession process and be stuck.After having assembled, as shown in Figure 3, on precession direction, in inner thread piece, in the side of internal thread 2 and threaded male fastener, fit in the side of outside thread 1, and the root of the tooth of the crest of inner thread piece and threaded male fastener is fitted, comparison with standard screw thread, the frictional force between inner thread piece and threaded male fastener is larger, has better relaxation effect.
This threaded male fastener and screw threads for fastening structure, it is improved the distance of root of the tooth angle and crest and root of the tooth on the basis of standard external, threaded male fastener is being fitted with externally threaded side in the internal thread side and threaded male fastener of inner thread piece in the fastening structure of inner thread piece, and the root of the tooth of the crest of inner thread piece and threaded male fastener is fitted, thus effectively improve the relaxing serializability of screw thread.This threaded male fastener and fastening structure are applied to and vibrate on large, that operating environment temperature is high boosting type motor, the sealing of each attachment face can be guaranteed, make not easily to get loose between each component, and threaded male fastener and inner thread piece easy to assemble, can Reusability, improve the convenience of maintenance.
In the present embodiment, threaded male fastener can be bolt, stud, stud etc., and inner thread piece can be nut, screw etc.
In sum, content of the present utility model is not limited in the above-described embodiments, and those skilled in the art can propose other mode of execution easily according to guiding theory of the present utility model, and these mode of executions are all included within scope of the present utility model.
Claims (7)
1. a threaded male fastener, is characterized in that: the axial angle of externally threaded root of the tooth and this threaded male fastener is between 0.3 ° ~ 0.6 °, and in rising trend along precession direction; Distance between described externally threaded crest and root of the tooth 0.05mm ~ 0.1mm less of the 5H/8 of standard.
2. threaded male fastener according to claim 1, is characterized in that: the axial angle of described externally threaded root of the tooth and this threaded male fastener is 0.5 °.
3. threaded male fastener according to claim 1, is characterized in that: the 0.08mm less of the 5H/8 of standard of the distance between described externally threaded crest and root of the tooth.
4. threaded male fastener according to claim 1, is characterized in that: described externally threaded surface is provided with break-in protective layer.
5. threaded male fastener according to claim 4, is characterized in that: described break-in protective layer is the break-in protective layer formed by solid lubricant.
6. threaded male fastener according to claim 5, is characterized in that: described break-in protective layer is the break-in protective layer formed by grease.
7. a screw threads for fastening structure, it is characterized in that: comprise the threaded male fastener according to any one of inner thread piece and the claims 1 to 6, this inner thread piece and described threaded male fastener are spirally connected, on precession direction, in described inner thread piece, in the side of internal thread and described threaded male fastener, fit in externally threaded side, and the root of the tooth of the crest of described inner thread piece and described threaded male fastener is fitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520813044.6U CN205013477U (en) | 2015-10-15 | 2015-10-15 | Outer threaded fastener and screw fastening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520813044.6U CN205013477U (en) | 2015-10-15 | 2015-10-15 | Outer threaded fastener and screw fastening structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205013477U true CN205013477U (en) | 2016-02-03 |
Family
ID=55212085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520813044.6U Expired - Fee Related CN205013477U (en) | 2015-10-15 | 2015-10-15 | Outer threaded fastener and screw fastening structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205013477U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114407A (en) * | 2015-09-02 | 2015-12-02 | 中国重型机械研究院股份公司 | Bolt positioning mechanism |
| CN110360204A (en) * | 2019-06-25 | 2019-10-22 | 雍珊麟 | A kind of threaded fastener and screw connection structure |
| CN112496249A (en) * | 2020-11-11 | 2021-03-16 | 嘉兴联控汽车部件有限公司 | Processing technology of high-temperature-resistant anti-loosening bolt |
-
2015
- 2015-10-15 CN CN201520813044.6U patent/CN205013477U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114407A (en) * | 2015-09-02 | 2015-12-02 | 中国重型机械研究院股份公司 | Bolt positioning mechanism |
| CN110360204A (en) * | 2019-06-25 | 2019-10-22 | 雍珊麟 | A kind of threaded fastener and screw connection structure |
| CN112496249A (en) * | 2020-11-11 | 2021-03-16 | 嘉兴联控汽车部件有限公司 | Processing technology of high-temperature-resistant anti-loosening bolt |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee before: Anhui Jianghuai Automobile Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160203 Termination date: 20191015 |