CN104141669A - Self-locking nut and manufacturing method thereof - Google Patents
Self-locking nut and manufacturing method thereof Download PDFInfo
- Publication number
- CN104141669A CN104141669A CN201310649453.2A CN201310649453A CN104141669A CN 104141669 A CN104141669 A CN 104141669A CN 201310649453 A CN201310649453 A CN 201310649453A CN 104141669 A CN104141669 A CN 104141669A
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- lock washer
- section
- self
- locking nut
- macropore
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Abstract
The invention relates to a self-locking nut and a manufacturing method thereof. The self-locking nut comprises a nut body, wherein the nut body comprises a stepped inner hole; the stepped inner hole comprises a small hole section and a large hole section which are arranged in a front-and-back manner; a locking washer which is spaced from the back end opening edge of the small hole section is fixedly arranged on the hole wall of the large hole section; an inner thread of the self-locking nut comprises a front thread section arranged on the hole wall of the small hole section and a back thread section arranged on the inner circumferential wall of the locking washer; the space between the locking washer and the back end opening edge of the small hole section is smaller than the thread pitch of the inner thread. The self-locking nut is high in self-locking capacity.
Description
Technical field
The present invention relates to a kind of self-locking nut and preparation method thereof.
Background technique
In Machine Design manufacture field, from the birth of threaded fastener, in order to solve the problem that gets loose of fastening piece, various countries technician has all carried out a large amount of experimental researcies.Existing a kind of self-locking nut as disclosed in Chinese patent CN101893031 " a kind of self-locking method of nut and compression pitch deformation type nut ", this self-locking nut comprises the nut body with tapped hole, on nut body, be provided with the opening slot communicating with tapped hole, the initial groove width of opening slot equals the pitch of internal thread, before self-locking nut is used, by compression tool, one end of nut body is applied to axial compression power, thereby the width that makes opening slot is compressed, diminish, near pitch opening slot changes like this, when coordinating with bolt, near internal thread opening slot can produce larger friction torque with bolt, thereby effectively prevent nut loosening.The problem that existing this self-locking nut exists is: the form that reduces opening groove width by employing reduces pitch, when compression tool pushes nut body, nut body can be towards opening slot place one side generation deflection, affect like this attractive in appearance of self-locking nut; In addition, the setting of opening slot also makes external impurities easily through opening slot, enter in the matching gap of bolt and self-locking nut, affect on the one hand the quality of connection of bolt and self-locking nut, the internal thread that also causes on the other hand self-locking nut is corrosion-vulnerable more, affects the working life of self-locking nut; Be exactly in addition pitch change place of existing this self-locking nut in fact only occur in opening slot near, and can not make the pitch of whole circumferencial direction all diminish, that is to say that bolt and self-locking nut occur to be diminished and the region of self-locking is less by pitch, the self-lock ability of self-locking nut is limited.
Summary of the invention
The object of the present invention is to provide the self-locking nut that a kind of self-lock ability is higher; The present invention also aims to provide a kind of making method of this self-locking nut.
In order to address the above problem, in the present invention, the technological scheme of self-locking nut is:
A kind of self-locking nut, comprise nut body, described nut body has ladder endoporus, the aperture section and the macropore section that before and after described ladder endoporus comprises, arrange, on the hole wall of described macropore section, be installed with described aperture section rear port along spaced lock washer, the internal thread of described self-locking nut comprises the preceding thread section that is arranged on described aperture section hole wall and is arranged at the rear thread section on described lock washer inner circle wall, and described lock washer and the interval between described aperture section rear port edge are less than the pitch of described internal thread.
Described lock washer is fixedly arranged on the hole wall of described macropore section by fixed connection structure, described fixed connection structure comprise be connected in the transition shoulder between described aperture section and macropore section and be arranged on described lock washer rear side macropore sector hole wall in turn edge, described lock washer clamped be fixed on described transition shoulder and in turn edge between.
Described transition shoulder is external diameter from front to back and becomes gradually large taper.
Described lock washer is outer rim towards the dish type of front side, bottom turnover.
In the present invention, the technological scheme of the making method of self-locking nut is:
The making method of self-locking nut, comprise the following steps, the first step, choose the nut body with ladder endoporus, the aperture section and the macropore section that before and after ladder endoporus comprises, arrange, aperture section is connected by transition shoulder with macropore section, and described transition shoulder is external diameter from front to back and becomes gradually large taper, by lock washer by rear in the front macropore section that packs ladder endoporus into, the outer rim of lock washer by block in the rear end of transition shoulder; Second step, use closing-in mould to apply by rear to front axial force the rear end of nut body, the macropore sector hole wall of lock washer rear side be extruded and in translate into one and stop lock washer to turn edge in mobile backwards, the aperture of the surrounded endoporus that inside turns edge is greater than the aperture of the endoporus of described lock washer; The 3rd step is attacked internal thread on the inner hole wall of aperture section and on the inner circle wall of lock washer; The 4th step, is used distortion mould to apply by rear to front axial force the ear end face of lock washer, makes lock washer be deformed into the pitch that interval between lock washer and aperture section rear port is less than described internal thread forward.
Described lock washer is outer rim towards the dish type of front side, bottom turnover.
Beneficial effect of the present invention is: the present invention realizes change pitch by the interval of controlling between lock washer and aperture section rear port, to realize the self-lock ability of locking nut, the whole annular circumferential that the region that pitch changes like this occurs in interval between lock washer and aperture section makes progress, that is to say that bolt and self-locking nut occur to be diminished and the region of self-locking is whole circumferencial direction by pitch, the increase in self-locking region has improved the friction torque between internal thread and bolt, has improved the self-lock ability of self-locking nut.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of self-locking nut in the present invention;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is the structural representation of lock washer in Fig. 1;
Fig. 4 is the plan view of Fig. 3;
Fig. 5 is the process schematic diagram of the first step in the making method embodiment of self-locking nut in the present invention;
Fig. 6 is the process schematic diagram of second step in the making method embodiment of self-locking nut in the present invention;
Fig. 7 is the process schematic diagram of the 3rd step in the making method embodiment of self-locking nut in the present invention;
Fig. 8 is the process schematic diagram of the 4th step in the making method embodiment of self-locking nut in the present invention.
Embodiment
A kind of embodiment of self-locking nut is as shown in Fig. 1 ~ 4: comprise the nut body 6 with ladder endoporus, the aperture section 8 and the macropore section 4 that before and after ladder endoporus comprises, arrange, aperture section is connected by transition shoulder 5 with macropore section, and transition shoulder is external diameter from front to back and becomes gradually large taper.On the hole wall of macropore section, be provided with lock washer 2, lock washer is outer rim towards the dish type of front side, bottom turnover, the outer rim of lock washer by block in the rear end of transition shoulder, on the hole wall of macropore section, in being provided with, the rear side of lock washer turns edge 3, lock washer be clamped and fastened on transition shoulder and in turn edge between, transition shoulder and in turn edge and formed the fixed connection structure for fixing and locking packing ring.The internal thread of self-locking nut comprises the preceding thread section 7 being arranged on aperture section hole wall and is arranged at the rear thread section 1 on lock washer inner circle wall, and lock washer and the interval between aperture section rear port edge are less than the pitch of internal thread.
By the interval of controlling between lock washer and aperture section rear port edge, change pitch, increased self-locking region, improved the self-lock ability of self-locking nut, do not need nut body distortion simultaneously yet, the beautiful shape of self-locking nut, fluting need to be set on nut body in addition, external impurities can not enter in the matching gap of self-locking nut and bolt, has guaranteed the working life of self-locking nut yet; The disk-shaped structure of lock washer makes lock washer have certain elastic deformability, further greatly improved the stability of self-locking nut and repeated practicability, the lock washer of disk-shaped structure also can coordinate to guarantee to have interval between lock washer and aperture section with transition shoulder in addition; Lock washer and nut body are made by metallic material, and self-locking nut can be used in hot environment.In other embodiment of this self-locking nut: lock washer can also be faced washer, certainly transition shoulder can be also a plane structure that bearing of trend is vertical with fore-and-aft direction, now can pad dress cushion block between lock washer and transition shoulder guarantee the rear port of lock washer and aperture section along between there is interval, fixed connection structure now comprise cushion block with in turn edge; Inside turn edge and can not establish, now lock washer can be directly welded on the hole wall of macropore section, fixed connection structure now can be only the welded structure between macropore section and lock washer; Certainly the outer rim of lock washer can also be one-body molded with macropore section.
The embodiment of the making method of self-locking nut is as shown in Fig. 5 ~ 8, comprise the following steps, the first step, choose the nut body 6 with ladder endoporus, the aperture section 8 and the macropore section 4 that before and after ladder endoporus comprises, arrange, aperture section is connected by transition shoulder 5 with macropore section, and described transition shoulder is external diameter from front to back and becomes gradually large taper, by lock washer 2 by rear in the front macropore section that packs ladder endoporus into, the outer rim of lock washer by block in the rear end of transition shoulder; Second step, use the rear end of 9 pairs of nut bodies of closing-in mould to apply by rear to front axial force, the macropore sector hole wall of lock washer rear side be extruded and in translate into one and stop lock washer to turn edge 3 in mobile backwards, the aperture of the surrounded endoporus that inside turns edge is greater than the aperture of the endoporus of described lock washer; The 3rd step is attacked internal thread on the inner hole wall of aperture section and on the inner circle wall of lock washer, and internal thread comprises the preceding thread section 7 being arranged on pin-and-hole sector hole wall and is arranged at the rear thread section 1 on lock washer inner circle wall; The 4th step, is used the ear end face of 10 pairs of lock washers of distortion mould to apply by rear to front axial force, makes lock washer be deformed into the pitch that interval between lock washer and aperture section rear port is less than described internal thread forward.
Described lock washer is outer rim towards the dish type of front side, bottom turnover.In other embodiment of this making method, lock washer can be also faced washer.
Claims (6)
1. a self-locking nut, comprise nut body, it is characterized in that: described nut body has ladder endoporus, the aperture section and the macropore section that before and after described ladder endoporus comprises, arrange, on the hole wall of described macropore section, be installed with described aperture section rear port along spaced lock washer, the internal thread of described self-locking nut comprises the preceding thread section that is arranged on described aperture section hole wall and is arranged at the rear thread section on described lock washer inner circle wall, and described lock washer and the interval between described aperture section rear port edge are less than the pitch of described internal thread.
2. self-locking nut according to claim 1, it is characterized in that: described lock washer is fixedly arranged on the hole wall of described macropore section by fixed connection structure, described fixed connection structure comprise be connected in the transition shoulder between described aperture section and macropore section and be arranged on described lock washer rear side macropore sector hole wall in turn edge, described lock washer clamped be fixed on described transition shoulder and in turn edge between.
3. self-locking nut according to claim 2, is characterized in that: described transition shoulder is external diameter from front to back and becomes gradually large taper.
4. according to the self-locking nut described in claim 1 ~ 3 any one, it is characterized in that: described lock washer is outer rim towards the dish type of front side, bottom turnover.
5. the making method of self-locking nut claimed in claim 1, it is characterized in that: comprise the following steps, the first step, choose the nut body with ladder endoporus, the aperture section and the macropore section that before and after ladder endoporus comprises, arrange, aperture section is connected by transition shoulder with macropore section, and described transition shoulder is external diameter from front to back and becomes gradually large taper, by lock washer by rear in the front macropore section that packs ladder endoporus into, the outer rim of lock washer by block in the rear end of transition shoulder; Second step, use closing-in mould to apply by rear to front axial force the rear end of nut body, the macropore sector hole wall of lock washer rear side be extruded and in translate into one and stop lock washer to turn edge in mobile backwards, the aperture of the surrounded endoporus that inside turns edge is greater than the aperture of the endoporus of described lock washer; The 3rd step is attacked internal thread on the inner hole wall of aperture section and on the inner circle wall of lock washer; The 4th step, is used distortion mould to apply by rear to front axial force the ear end face of lock washer, makes lock washer be deformed into the pitch that interval between lock washer and aperture section rear port is less than described internal thread forward.
6. the making method of self-locking nut according to claim 5, is characterized in that: described lock washer is outer rim towards the dish type of front side, bottom turnover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310649453.2A CN104141669A (en) | 2013-12-06 | 2013-12-06 | Self-locking nut and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310649453.2A CN104141669A (en) | 2013-12-06 | 2013-12-06 | Self-locking nut and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104141669A true CN104141669A (en) | 2014-11-12 |
Family
ID=51850948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310649453.2A Pending CN104141669A (en) | 2013-12-06 | 2013-12-06 | Self-locking nut and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104141669A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035755A (en) * | 2017-05-17 | 2017-08-11 | 贵州航天精工制造有限公司 | Light-duty self-locking nut of a kind of anti-cold welding of self-lubricating and production and preparation method thereof |
| CN112303094A (en) * | 2020-11-20 | 2021-02-02 | 河南航天精工制造有限公司 | Non-metal insert slotted nut |
| CN114364889A (en) * | 2019-08-02 | 2022-04-15 | Sf贸易和就业有限公司 | Locking nut |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2222460A (en) * | 1938-07-01 | 1940-11-19 | Dill Mfg Co | Lock nut |
| US2318397A (en) * | 1938-09-10 | 1943-05-04 | Elastic Stop Nut Corp | Manufacture of self-locking nuts |
| US2569989A (en) * | 1950-07-10 | 1951-10-02 | Harry E Karr | Pressure stop nut |
| EP0636801A1 (en) * | 1993-04-27 | 1995-02-01 | FLAIG UND HOMMEL GmbH & Co. KG, Handels- und Besitzgesellschaft | Lock nut |
| EP0972956A1 (en) * | 1998-07-17 | 2000-01-19 | Urama S.r.l. | Self-restraining metal ring nuts, and processes for the production thereof |
| CN102483088A (en) * | 2009-07-03 | 2012-05-30 | 哈特马特.弗莱格 | Lock nut |
| CN202266560U (en) * | 2011-08-29 | 2012-06-06 | 何茂 | Improved locknut |
| CN102889292A (en) * | 2012-10-25 | 2013-01-23 | 洛阳轴研科技股份有限公司 | Fastening method for anti-falling nut with damping ring |
-
2013
- 2013-12-06 CN CN201310649453.2A patent/CN104141669A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2222460A (en) * | 1938-07-01 | 1940-11-19 | Dill Mfg Co | Lock nut |
| US2318397A (en) * | 1938-09-10 | 1943-05-04 | Elastic Stop Nut Corp | Manufacture of self-locking nuts |
| US2569989A (en) * | 1950-07-10 | 1951-10-02 | Harry E Karr | Pressure stop nut |
| EP0636801A1 (en) * | 1993-04-27 | 1995-02-01 | FLAIG UND HOMMEL GmbH & Co. KG, Handels- und Besitzgesellschaft | Lock nut |
| EP0972956A1 (en) * | 1998-07-17 | 2000-01-19 | Urama S.r.l. | Self-restraining metal ring nuts, and processes for the production thereof |
| CN102483088A (en) * | 2009-07-03 | 2012-05-30 | 哈特马特.弗莱格 | Lock nut |
| CN202266560U (en) * | 2011-08-29 | 2012-06-06 | 何茂 | Improved locknut |
| CN102889292A (en) * | 2012-10-25 | 2013-01-23 | 洛阳轴研科技股份有限公司 | Fastening method for anti-falling nut with damping ring |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035755A (en) * | 2017-05-17 | 2017-08-11 | 贵州航天精工制造有限公司 | Light-duty self-locking nut of a kind of anti-cold welding of self-lubricating and production and preparation method thereof |
| CN114364889A (en) * | 2019-08-02 | 2022-04-15 | Sf贸易和就业有限公司 | Locking nut |
| CN112303094A (en) * | 2020-11-20 | 2021-02-02 | 河南航天精工制造有限公司 | Non-metal insert slotted nut |
| CN112303094B (en) * | 2020-11-20 | 2021-12-14 | 河南航天精工制造有限公司 | Non-metal insert slotted nut |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141112 |