CN203809476U - Eccentric self-locking stop nut - Google Patents
Eccentric self-locking stop nut Download PDFInfo
- Publication number
- CN203809476U CN203809476U CN201420098000.5U CN201420098000U CN203809476U CN 203809476 U CN203809476 U CN 203809476U CN 201420098000 U CN201420098000 U CN 201420098000U CN 203809476 U CN203809476 U CN 203809476U
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- Prior art keywords
- self
- eccentric
- locking
- boss
- taper
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000003754 machining Methods 0.000 abstract 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model relates to an eccentric self-locking stop nut. The eccentric self-locking stop nut comprises a nut body with a main threaded hole and a self-locking nut with a self-locking threaded hole. The eccentric self-locking stop nut is characterized in that an upwards extending taper boss is designed in the middle of the upper end face of the nut body, the main threaded hole penetrates the taper boss, eccentric distance exists between the central axis of the taper boss and the central axis of the main threaded hole, a taper hole which sleeves an eccentric boss is formed in the lower end face of the self-locking nut, the taper degree of the taper boss is equal to that of the taper hole, the central axis of the taper hole coincides with that of the self-locking threaded hole, and the protruding height of the taper boss is smaller than the concave depth of the taper hole. As for the taper boss and the taper hole, only the taper boss is arranged in an eccentric mode, the machining precision is quite easy to control during machining and manufacturing, the manufacturing difficulty is correspondingly reduced, machining rejection rate caused by inaccurate eccentricity machining is reduced, and product costs are lowered.
Description
Technical field
The utility model relates to a kind of fastening piece that is threaded for machinery, relates in particular to a kind of eccentric self-locking lock nut, and this lock nut is particularly suitable for the often environment being threaded in strenuous vibration.
Background technique
It is locking with axial force fastening means that the fastening piece that is threaded is often referred to plain bolt nut, makes standard universal part, and owing to being subject to the impact of operating conditions environment, often fastening nut easily becomes flexible, exits and cause fastening inefficacy, and serious meeting causes security incident.Along with the development of technology, it is more and more higher that all trades and professions double thread connects the locking requirement of fastening piece, mainly contains following several at present to the locking mode of nut:
1, rub locking.This mode is most widely used a kind of locking mode, and this mode produces a positive pressure not changing with external force between screw pair, to produce one, can stop screw pair frictional force in relative rotation.This positive pressure can be by axially or simultaneously two realizing to collet threaded pair.As adopt elastic washer, double nut, self-locking nut and nylon inserts locking nut etc.This nut anti-looseness mode is more convenient for the dismounting of nut, but in the situation of shock and vibration and varying load, bolt can decline because of the lax pretightening force that causes at the beginning, along with the increase of vibration number, the pretightening force of loss increases lentamente, finally will cause that nut gets loose, scyewed joint lost efficacy.
2, mechanical nut anti-looseness.This mode is directly to limit relatively rotating of screw pair with retainer.As adopt cotter pin, series winding steel wire and lock washer etc.This mode causes dismounting inconvenient.
3, riveting is rushed locking.After tightening, adopt and rush point, welding, the method such as bonding, make screw pair lose kinematic pair characteristic and be connected to become non-disconnectable connection.The shortcoming of this mode is that tightening latch can only be used once, and dismounting is very difficult, must destroy bolt pair and can dismantle.
Aforementioned nut anti-loose structure respectively has pluses and minuses, but synthesise various factor also needs to be further improved.
Summary of the invention
Technical problem to be solved in the utility model be a kind of locking reliable, rational in infrastructure, convenient disassembly is provided for above-mentioned prior art present situation, cost is lower and reusable eccentric self-locking lock nut.
The utility model solves the problems of the technologies described above adopted technological scheme: a kind of eccentric self-locking lock nut, comprise the self-locking nut that there is the nut body in main thread hole and there is self-locking thread hole, it is characterized in that: the middle part, upper-end surface of described nut body has upwardly extending cone boss, cone boss is run through in main thread hole, and the medial axis in the medial axis of cone boss and described main thread hole has an eccentric distance; The lower end surface of described self-locking nut has to be set in the cone shape hole on eccentric boss, the tapering of cone boss is identical with the tapering of cone shape hole, the medial axis of cone shape hole overlaps with the medial axis in described self-locking thread hole, and the protrusion height of cone boss is less than the recessed degree of depth of cone shape hole.
According to producing actual demand, above-mentioned eccentric distance is radially 1.0～1.8 times of maximum limit of permissible error of screw-thread fit.Be preferably 1.2～1.6 times.
The recessed degree of depth of the protrusion height of above-mentioned cone boss and cone shape hole is between 3～7mm.
The tapering of above-mentioned cone boss and cone shape hole and the tapering of cone shape hole are 12～20 °.
Between the upper-end surface of above-mentioned cone boss and cone shape hole roof, be provided with flexible gaskets.When self-locking nut rotates compression, flexible gaskets will be compressed between self-locking nut and nut body and be out of shape like this, produces the anti-loosing effect as lock washer, further prevents self-locking nut becoming flexible when locking state.
Compared with prior art, the utility model has the advantage of: in cone boss and cone shape hole, only have cone boss to be set for the eccentric, concerning manufacturing, be easier to controlled working precision, corresponding reduction manufacture difficulty, less because of the inaccurate processing reject rate causing of centripetal moment processing, reduce the cost of product; Because cone boss is set for the eccentric, while screwing self-locking nut, due to eccentric existence, the outside thread of the relative connecting bolt in self-locking thread hole on self-locking nut produces larger radial force in engagement place, according to the principle of active force and reaction force, the outside thread of the relative connecting bolt in main thread hole of nut body also produces larger radial reaction force in engagement place, under the effect of two radial forces, make self-locking nut and connecting bolt firmly locked, only need rotate backward self-locking nut during release in addition, convenient disassembly is also reusable.
Accompanying drawing explanation
Fig. 1 is the structure sectional view of nut body in the utility model embodiment;
Fig. 2 is the plan view of nut body in the utility model embodiment;
Fig. 3 is the structure sectional view of self-locking nut in the utility model embodiment;
Fig. 4 is the plan view of self-locking nut in the utility model embodiment;
Fig. 5 is that the utility model embodiment uses phase diagram.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
As shown in the figure, be a preferred embodiment of the present utility model.
An eccentric lock nut, comprises the nut body 1 with main thread hole 11 and the self-locking nut 2 with self-locking thread hole 21.
The middle part, upper-end surface of nut body 1 has upwardly extending cone boss 12, cone boss 12 is run through in main thread hole 11, the medial axis 3 of cone boss 12 has an eccentric distance e with the medial axis 4 in main thread hole 11, eccentric distance e is radially 1.0～1.8 times of maximum limit of permissible error of screw-thread fit, take 1.2～1.6 times as good.
The lower end surface of self-locking nut 2 has to be set in the cone shape hole 22 on eccentric boss 12, and the taper theta 1 of cone boss 12 is identical with the taper theta 2 of cone shape hole 22, and the taper theta 1 of cone boss 12 and cone shape hole 22 and the taper theta of cone shape hole 22 2 are 12～20 °.The medial axis 5 of cone shape hole 22 has a second eccentric distance e2 with the medial axis 6 in described self-locking thread hole 21, and the first eccentric distance e1 is greater than the second eccentric distance e2, and the protrusion height h1 of cone boss 12 is less than the recessed degree of depth h2 of cone shape hole 22.The protrusion height h1 of cone boss 12 and the recessed degree of depth h2 of cone shape hole 22 are between 3～7mm.
Between the upper-end surface of cone boss 12 and cone shape hole 22 roofs, be provided with flexible gaskets 7.
In cone boss 12 and cone shape hole 22, only have cone boss 12 to be set for the eccentric, concerning manufacturing, be easier to controlled working precision, corresponding reduction manufacture difficulty, less because of the inaccurate processing reject rate causing of centripetal moment processing, reduce the cost of product, because cone boss 12 is set for the eccentric, while screwing self-locking nut 2, due to eccentric existence, the outside thread of the self-locking thread hole 21 relative connecting bolts 8 on self-locking nut 2 produces larger radial force P1 in engagement place, according to the principle of active force and reaction force, the outside thread of the main thread hole 11 relative connecting bolts 8 of nut body 1 also produces larger radial reaction force P2 in engagement place, under the effect of two radial forces, make self-locking nut 2 and connecting bolt 8 firmly locked, only need rotate backward self-locking nut 2 during release in addition, convenient disassembly is also reusable.
Claims (6)
1. an eccentric self-locking lock nut, comprise the nut body (1) with main thread hole (11) and the self-locking nut (2) with self-locking thread hole (21), it is characterized in that: the middle part, upper-end surface of described nut body (1) has upwardly extending cone boss (12), cone boss (12) is run through in main thread hole (11), and the medial axis (3) of cone boss (12) has an eccentric distance (e) with the medial axis (4) in described main thread hole (11); The lower end surface of described self-locking nut (2) has to be set in the cone shape hole (22) on eccentric boss (12), the tapering (θ 2) of the tapering of cone boss (12) (θ 1) and cone shape hole (22) is identical, the medial axis (5) of cone shape hole (22) overlaps with the medial axis (6) in described self-locking thread hole (21), and the protrusion height (h1) of cone boss (12) is less than the recessed degree of depth (h2) of cone shape hole (22).
2. eccentric self-locking lock nut according to claim 1, is characterized in that: described eccentric distance (e) is screw-thread fit 1.0～1.8 times of maximum limit of permissible error radially.
3. eccentric self-locking lock nut according to claim 2, is characterized in that: described eccentric distance (e) is screw-thread fit 1.2～1.6 times of maximum limit of permissible error radially.
4. eccentric self-locking lock nut according to claim 1, is characterized in that: the protrusion height (h1) of described cone boss (12) and the recessed degree of depth (h2) of cone shape hole (22) are between 3～7mm.
5. eccentric self-locking lock nut according to claim 1, is characterized in that: the tapering (θ 1) of described cone boss (12) and cone shape hole (22) and the tapering (θ 2) of cone shape hole (22) are 12～20 °.
6. eccentric self-locking lock nut according to claim 1, is characterized in that: between the upper-end surface of described cone boss (12) and cone shape hole (22) roof, be provided with flexible gaskets (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420098000.5U CN203809476U (en) | 2014-03-05 | 2014-03-05 | Eccentric self-locking stop nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420098000.5U CN203809476U (en) | 2014-03-05 | 2014-03-05 | Eccentric self-locking stop nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203809476U true CN203809476U (en) | 2014-09-03 |
Family
ID=51448233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420098000.5U Expired - Lifetime CN203809476U (en) | 2014-03-05 | 2014-03-05 | Eccentric self-locking stop nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203809476U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533922A (en) * | 2014-12-24 | 2015-04-22 | 苏州欧美克合金工具有限公司 | Eccentric nut |
| CN105201020A (en) * | 2015-10-25 | 2015-12-30 | 安庆市科兴生产力促进中心有限公司 | Inspection well cover |
| CN105927653A (en) * | 2016-07-18 | 2016-09-07 | 徐州徐工筑路机械有限公司 | Combined eccentric anti-loosening nut |
| CN106382295A (en) * | 2016-10-15 | 2017-02-08 | 李艳 | Multiple-looseness-prevention nut |
| CN108006048A (en) * | 2017-11-30 | 2018-05-08 | 安徽西马新能源技术有限公司 | A kind of compound nut structure |
| CN112727896A (en) * | 2021-01-19 | 2021-04-30 | 沈阳博研铁路车辆配件有限公司 | Elastic self-locking nut |
| CN120537730A (en) * | 2024-05-22 | 2025-08-26 | 上海海立电器有限公司 | Assembly structure of compressor cover and housing and compressor |
-
2014
- 2014-03-05 CN CN201420098000.5U patent/CN203809476U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533922A (en) * | 2014-12-24 | 2015-04-22 | 苏州欧美克合金工具有限公司 | Eccentric nut |
| CN105201020A (en) * | 2015-10-25 | 2015-12-30 | 安庆市科兴生产力促进中心有限公司 | Inspection well cover |
| CN105927653A (en) * | 2016-07-18 | 2016-09-07 | 徐州徐工筑路机械有限公司 | Combined eccentric anti-loosening nut |
| CN106382295A (en) * | 2016-10-15 | 2017-02-08 | 李艳 | Multiple-looseness-prevention nut |
| CN108006048A (en) * | 2017-11-30 | 2018-05-08 | 安徽西马新能源技术有限公司 | A kind of compound nut structure |
| CN112727896A (en) * | 2021-01-19 | 2021-04-30 | 沈阳博研铁路车辆配件有限公司 | Elastic self-locking nut |
| CN120537730A (en) * | 2024-05-22 | 2025-08-26 | 上海海立电器有限公司 | Assembly structure of compressor cover and housing and compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170802 Address after: 322000 Zhejiang province Yiwu city streets Niansanli East Industrial Park Patentee after: Ye Hong Address before: 322000 Zhejiang province Yiwu city streets Niansanli East Industrial Park Patentee before: ZHEJIANG SAIRI ELECTROMECHANICAL TECHNOLOGY CO.,LTD. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |
|
| CX01 | Expiry of patent term |