CN208966818U - A kind of anti-loosening bolt - Google Patents
A kind of anti-loosening bolt Download PDFInfo
- Publication number
- CN208966818U CN208966818U CN201821682067.8U CN201821682067U CN208966818U CN 208966818 U CN208966818 U CN 208966818U CN 201821682067 U CN201821682067 U CN 201821682067U CN 208966818 U CN208966818 U CN 208966818U
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- bolt
- nut
- screw thread
- outer end
- thread
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Abstract
The utility model relates to a kind of anti-loosening bolts.Including bolt, screw thread on bolt screw rod is made of the middle part screw thread below outer end screw thread and outer end screw thread far from bolt head, outer end screw thread and middle part screw thread it is oppositely oriented, the screw pitch of outer end screw thread is less than the screw pitch of middle part screw thread, the outer diameter of the bolt of outer end thread segment is less than the outer diameter of the bolt of middle part thread segment, the inner nut for further including the outer nut being threadedly coupled with the outer end thread segment of bolt and being threadedly coupled with the middle part thread segment of bolt, the inner ring of outer nut is constituted by cylinder and for the truncated cone-shaped of middle part thread segment insertion, small-bore one end of truncated cone-shaped is connect with cylinder, heavy caliber one end is towards inner nut, the cylindrical inner collar of outer nut is threadedly coupled with the outer end thread segment of bolt, two plain cushions are arranged between the bolt head and inner nut of bolt, the sheathed spring pad between plain cushion and inner nut far from bolt head.The utility model reliable performance, high-efficient, strong applicability.
Description
Technical field
The utility model relates to bolt technical field more particularly to a kind of anti-loosening bolts.
Background technique
Current screw retention, which moves measure, to be had: friction is locking, machinery is locking, impact is locking, bonds locking, various bolts all one
Fixed defect, rubbing locking is that a normal pressure not changed with external force is generated between screw thread pair, can prevent spiral shell to generate one
The frictional force that line pair relatively rotates, such as elastic washer, double nut, self-locking nut and nylon inserts locking nut are used, it is this
Nut anti-looseness mode is more convenient for the disassembly of nut, but the shock and vibration and varying load the case where, and bolt can be because at the beginning
Relaxation causes pretightning force to decline, and with the increase of vibration number, the pretightning force of loss slowly increases, and will eventually lead to nut
It loosens, be threadedly coupled failure.Locking machinery is the relative rotation stop nut principle that screw thread pair is directly limited with retainer, is such as adopted
With split pin, series winding steel wire and stop washer etc., this mode causes disassembly inconvenient.Riveting punching, bond it is locking be tighten it is anti-
Using the methods of point, welding, bonding is rushed after loose nut, screw thread pair is made to lose movement sub-attribute and be connected to become non-disconnectable connection,
The stop nut of this mode is installed the disadvantage is that tightening latch is used only once, and is dismantled very difficult, it is necessary to destroy stop nut
Bolt pair can be dismantled.
Summary of the invention
The utility model aims to solve the problem that the deficiencies in the prior art, and provide a kind of easy to operate, reliable performance, it is high-efficient,
The anti-loosening bolt of strong applicability.
In order to achieve the above object, the utility model adopts the following technical solutions: a kind of anti-loosening bolt, including bolt, spiral shell
Screw thread on bolt screw rod is made of the middle part screw thread below outer end screw thread and outer end screw thread far from bolt head, and outer end screw thread is in
Portion's screw thread it is oppositely oriented, the screw pitch of outer end screw thread is less than the screw pitch of middle part screw thread, and the outer diameter of the bolt of outer end thread segment is less than
The outer diameter of the bolt of middle part thread segment, further include the outer nut being threadedly coupled with the outer end thread segment of bolt and with the middle part of bolt
The inner nut that thread segment is threadedly coupled, the outer end thread segment of inner nut and bolt have a gap, the inner ring of outer nut by cylindrical and
It is constituted for the truncated cone-shaped of middle part thread segment insertion, small-bore one end of truncated cone-shaped is connect with cylinder, heavy caliber one end is in
Nut, the cylindrical inner collar of outer nut are threadedly coupled with the outer end thread segment of bolt, and the truncated cone-shaped inner ring of outer nut is non-threaded,
Two plain cushions are arranged between the bolt head and inner nut of bolt, the sheathed spring between plain cushion and inner nut far from bolt head
Pad.
Preferably: the surface facing each other of inner nut and outer nut is zigzag.
Preferably: the outer diameter of the bolt of an outer end thread segment screw thread depth at least smaller than the outer diameter of the bolt of middle part thread segment
Degree.
The beneficial effects of the utility model are: the utility model prevents bolt looseness using positive and reverse return jam-packed principle, rubbing
In the case where wiping power failure, the reverse thread of inner nut and outer nut is arranged so that moved outside the micro loosening of inner nut increase with
The pretightning force of outer nut realizes screw retention, and the convenient disassembly of the bolt and inner nut, outer nut of the utility model, bolt can
Using multiple.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model use state.
In figure: 1- bolt；2- outer nut；3- inner nut；4- spring pad；5- connector；6- plain cushion.
It is described in detail below with reference to the embodiments of the present invention referring to attached drawing.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples:
As shown in Figure 1, the utility model includes bolt 1, the screw thread on 1 screw rod of bolt is by the outer end screw thread far from bolt head
Constituted with the middle part screw thread below the screw thread of outer end, outer end screw thread and middle part screw thread it is oppositely oriented, the screw pitch of outer end screw thread is less than
The screw pitch of middle part screw thread, the outer diameter of the bolt 1 of outer end thread segment are less than the outer diameter of the bolt 1 of middle part thread segment, further include and spiral shell
The outer nut 2 that the outer end thread segment of bolt 1 is threadedly coupled and the inner nut 3 being threadedly coupled with the middle part thread segment of bolt 1, inner nut
3 have gap with the outer end thread segment of bolt 1, and the inner ring of outer nut 2 is by cylinder and for the truncated cone-shaped structure of middle part thread segment insertion
Connect at small-bore one end of, truncated cone-shaped with cylinder, heavy caliber one end is towards inner nut 3, the cylindrical inner collar of outer nut 2 and
The outer end thread segment of bolt 1 is threadedly coupled, and the truncated cone-shaped inner ring of outer nut 2 is non-threaded, in the bolt head and inner nut 3 of bolt 1
Between be arranged two plain cushions 6, far from bolt head plain cushion 6 and inner nut 3 between sheathed spring pad 4.
The utility model screw locking structure includes bolt 1, plain cushion 6, spring pad 4, inner nut 3 and outer nut 2, using just
Derotation jam-packed principle prevents bolt looseness.Screw thread on shank of bolt is divided into front and back section, and (for leading portion far from bolt head, back segment is close to bolt
Head), back segment (middle part thread segment) is positive a standard pitch, and leading portion (outer end thread segment) is the thin screw pitch of anti-silk, and anti-silk section is (outer
Hold thread segment) outer diameter 1 standard thread depth smaller than positive silk section (middle part thread segment) outer diameter, it is smoothly screwed into convenient for inner nut 3.Outside
Nut 2 is designed as a part of without screw thread inner concave shape nut, guarantees to compress in the case that inner nut 3 tightens rear exposed three screw threads
Inner nut 3, and there are certain regulated quantity, the contact surface of outer nut 2 and inner nut 3 is designed as zigzag card slot, increases friction
Interlocking, (two plain cushions 6 are located at the two of connector 5 after adding plain cushion 6, spring pad 4 to tighten before inner nut 3 and bolt head
Side), it is screwed into outer nut 2, outer nut 2 is locking nut, keeps inner nut 3 and outer nut 2 to compress, occlusive state, when being become
When load, shock and vibration effect, there is active force since there are inertia for part, and between its adjacent part, so that screw thread pair
It is seriously reduced with the bearing surface friction coefficient of nut, sometimes even frictional force pop-off, to destroy the flat of original power
Weighing apparatus, so that inner nut 3 loses pretightning force, due to the effect of lead angle, it may appear that the phenomenon that micro sliding, and 3 spiral shell of inner nut
Away from bigger than 2 screw pitch lift angle of outer nut, in the case where frictional force failure, moving outside the micro loosening of inner nut 3 be will increase and outer nut 2
Pretightning force, to reach the anti-loosening purpose of bolt.
The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the utility model specific implementation not by
The limitation of aforesaid way, if the method concept of the utility model and the various improvement of technical solution progress are used, or without
Improvement directly applies to other occasions, both is within the protection scope of the present invention.
Claims (3)
1. a kind of anti-loosening bolt, it is characterised in that: including bolt (1), the screw thread on bolt (1) screw rod is by separate bolt head
Middle part screw thread below outer end screw thread and outer end screw thread is constituted, outer end screw thread and middle part screw thread it is oppositely oriented, outer end screw thread
Screw pitch is less than the screw pitch of middle part screw thread, and the outer diameter of the bolt (1) of outer end thread segment is less than the outer of the bolt (1) of middle part thread segment
Diameter further includes the outer nut (2) being threadedly coupled with the outer end thread segment of bolt (1) and the middle part thread segment screw thread with bolt (1)
The inner nut (3) of connection, inner nut (3) and the outer end thread segment of bolt (1) have gap, and the inner ring of outer nut (2) is by cylinder
Constituted with the truncated cone-shaped be inserted into for middle part thread segment, small-bore one end of truncated cone-shaped with it is cylindrical connect, heavy caliber one end direction
The cylindrical inner collar of inner nut (3), outer nut (2) is threadedly coupled with the outer end thread segment of bolt (1), the rotary table of outer nut (2)
Shape inner ring is non-threaded, is arranged two plain cushions (6) between the bolt head and inner nut (3) of bolt (1), flat far from bolt head
Pad sheathed spring pad (4) between (6) and inner nut (3).
2. anti-loosening bolt according to claim 1, it is characterised in that: inner nut (3) and outer nut (2) it is facing each other
Surface be zigzag.
3. anti-loosening bolt according to claim 1, it is characterised in that: the outer diameter of the bolt (1) of outer end thread segment is at least
A depth of thread smaller than the outer diameter of the bolt of middle part thread segment (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821682067.8U CN208966818U (en) | 2018-10-17 | 2018-10-17 | A kind of anti-loosening bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821682067.8U CN208966818U (en) | 2018-10-17 | 2018-10-17 | A kind of anti-loosening bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208966818U true CN208966818U (en) | 2019-06-11 |
Family
ID=66760011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821682067.8U Active CN208966818U (en) | 2018-10-17 | 2018-10-17 | A kind of anti-loosening bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208966818U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185691A (en) * | 2019-06-26 | 2019-08-30 | 朴得宝 | Prevent loose bolts nut assembly |
| CN113623309A (en) * | 2020-05-09 | 2021-11-09 | 中国石油化工股份有限公司 | Self-locking screw connection structure |
| CN114704540A (en) * | 2021-09-09 | 2022-07-05 | 杨富云 | Nut anti-loosening structure and anti-loosening thread pair |
| CN114992215A (en) * | 2022-07-19 | 2022-09-02 | 信阳航钛精密科技有限公司 | Lock catch fastening device for high-speed rail contact network |
-
2018
- 2018-10-17 CN CN201821682067.8U patent/CN208966818U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185691A (en) * | 2019-06-26 | 2019-08-30 | 朴得宝 | Prevent loose bolts nut assembly |
| CN113623309A (en) * | 2020-05-09 | 2021-11-09 | 中国石油化工股份有限公司 | Self-locking screw connection structure |
| CN114704540A (en) * | 2021-09-09 | 2022-07-05 | 杨富云 | Nut anti-loosening structure and anti-loosening thread pair |
| CN114992215A (en) * | 2022-07-19 | 2022-09-02 | 信阳航钛精密科技有限公司 | Lock catch fastening device for high-speed rail contact network |
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| GR01 | Patent grant |