CN203809477U - Eccentric loose preventing nut - Google Patents

Eccentric loose preventing nut Download PDF

Info

Publication number
CN203809477U
CN203809477U CN201420098238.8U CN201420098238U CN203809477U CN 203809477 U CN203809477 U CN 203809477U CN 201420098238 U CN201420098238 U CN 201420098238U CN 203809477 U CN203809477 U CN 203809477U
Authority
CN
China
Prior art keywords
eccentric
nut
locking
self
boss
Prior art date
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.)
Active
Application number
CN201420098238.8U
Other languages
Chinese (zh)
Inventor
叶宏
Original Assignee
Zhejiang Sai Electromechanical Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang Sai Electromechanical Technology Co Ltd filed Critical Zhejiang Sai Electromechanical Technology Co Ltd
Priority to CN201420098238.8U priority Critical patent/CN203809477U/en
Application granted granted Critical
Publication of CN203809477U publication Critical patent/CN203809477U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to an eccentric loose preventing nut. The eccentric loose preventing nut comprises a nut body provided with a main threaded hole, and a self-locking nut provided with a self-locking threaded hole. The eccentric loose preventing nut is characterized in that a tapered boss that upwards extends is arranged in the middle part of the upper end surface of the nut body; a first eccentric distance is generated between the central axis of the tapered boss and the central axis of the main threaded hole; an eccentric tapered hole that sleeves the eccentric boss is formed in the lower end surface of the self-locking nut; a second eccentric distance is generated between the central axis of the eccentric tapered hole and the central axis of the self-locking threaded hole. According to the eccentric loose preventing nut, each of the nut body and the self-locking nut is provided with an eccentric top point that is furthest away from the center of thread, thus eccentric stopping points are formed, which enable the nut body and the self-locking nut to respectively generate upper and lower inward radial locking forces for a connecting bolt, and as a result, the connecting bolt can uniformly bear the force, the locking force is large, the thread is avoided damaging, any damage is not caused after dismounting and mounting at a plurality of times, and reusability is also realized.

Description

A kind of eccentric lock nut
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 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 is that a kind of locking reliable, rational in infrastructure, convenient disassembly reusable eccentric lock nut are provided for above-mentioned prior art present situation.
The utility model solves the problems of the technologies described above adopted technological scheme: a kind of eccentric 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 first eccentric distance; The lower end surface of described self-locking nut has to be set in the eccentric cone shape hole on eccentric boss, the tapering of cone boss is identical with the tapering of eccentric cone shape hole, the eccentric medial axis of cone shape hole and the medial axis in described self-locking thread hole have second eccentric distance, and the first eccentric distance is greater than the second eccentric distance, the protrusion height of cone boss is less than the recessed degree of depth of eccentric cone shape hole.
As preferably, above-mentioned the first eccentric distance is 5 times of the second eccentric distance.Effectively like this guarantee that the eccentric distance between two can not be cancelled, guarantee to have all the time two eccentric points that hinder.Anti-loosing effect is better.
According to producing actual demand, above-mentioned the first 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.
Above-mentioned the second eccentric distance is radially 0.2~0.36 times of maximum limit of permissible error of screw-thread fit.Be preferably 0.24~0.32 times.
The recessed degree of depth of the protrusion height of above-mentioned cone boss and eccentric cone shape hole is between 3~7mm.
The tapering of above-mentioned cone boss and eccentric cone shape hole and the tapering of eccentric cone shape hole are 12~20 °.
The first eccentric summit of above-mentioned cone boss and the second eccentric summit of the eccentric cone shape hole ratio of angle and 360 ° that staggers is identical with the ratio of screw-thread fit tolerance and pitch.
Between the upper-end surface of above-mentioned cone boss and eccentric 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: cone boss and the equal eccentric setting of eccentric cone shape hole, therefore respectively there is eccentric summit farthest of Yi Geju thread center and form the eccentric point that hinders in nut body and self-locking nut, while screwing self-locking nut, owing to there being two eccentric points that hinder, nut body and self-locking nut produce upper and lower two inside radially coupling mechanism forces to connecting bolt respectively, connecting bolt is stressed evenly, coupling mechanism force is large, can bear judder and impact, and do not damage screw thread, these eccentric nut mounting or dismounting repeatedly can not damage yet, 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, and cone boss 12 is run through in main thread hole 11, and the medial axis 3 of cone boss 12 has a first eccentric distance e1 with the medial axis 4 in main thread hole 11; The lower end surface of self-locking nut 2 has to be set in the eccentric cone shape hole 22 on eccentric boss 12, the taper theta 1 of cone boss 12 is identical with the taper theta 2 of eccentric cone shape hole 22, and the taper theta 1 of cone boss 12 and eccentric cone shape hole 22 and the taper theta of eccentric cone shape hole 22 2 are 12~20 °.The medial axis 5 of eccentric 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 eccentric cone shape hole 22.The protrusion height h1 of cone boss 12 and the recessed degree of depth h2 of eccentric cone shape hole 22 are between 3~7mm.
The first eccentric distance e1 is 5 times of the second eccentric distance e2.
The first eccentric distance e1 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 second eccentric distance e2 is radially 0.2~0.36 times of maximum limit of permissible error of screw-thread fit.Take 0.24~0.32 times as good.
The first eccentric summit of cone boss 12 and the second eccentric summit of eccentric cone shape hole 22 ratio of angle and 360 ° that staggers is identical with the ratio of screw-thread fit tolerance and pitch.
Between the upper-end surface of cone boss 12 and eccentric cone shape hole 22 roofs, be provided with flexible gaskets 7.
Cone boss 12 and the equal eccentric setting of eccentric cone shape hole 22, therefore there is eccentric summit farthest of Yi Geju thread center and form the first eccentric some d1 that hinders in nut body 1, there is eccentric summit farthest of Yi Geju thread center and form the second eccentric some d2 that hinders in self-locking nut 2, while screwing self-locking nut, owing to there being two eccentric points that hinder, as shown in Figure 5, 1 pair of connecting bolt of nut body 8 produces the inside first coupling mechanism force P1 radially, 2 pairs of connecting bolts of self-locking nut 8 produce the inside second coupling mechanism force P2 radially, connecting bolt 8 is stressed evenly, coupling mechanism force is large, can bear judder and impact, and do not damage screw thread, these eccentric nut mounting or dismounting repeatedly can not damage yet, reusable.

Claims (10)

1. an eccentric 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 first eccentric distance (e1) 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 eccentric cone shape hole (22) on eccentric boss (12), the tapering (θ 2) of the tapering of cone boss (12) (θ 1) and eccentric cone shape hole (22) is identical, the medial axis (5) of eccentric cone shape hole (22) has 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), the protrusion height (h1) of cone boss (12) is less than the recessed degree of depth (h2) of eccentric cone shape hole (22).
2. eccentric lock nut according to claim 1, is characterized in that: described the first eccentric distance (e1) is 5 times of the second eccentric distance (e2).
3. eccentric lock nut according to claim 2, is characterized in that: described the first eccentric distance (e1) is screw-thread fit 1.0~1.8 times of maximum limit of permissible error radially.
4. eccentric lock nut according to claim 3, is characterized in that: described the first eccentric distance (e1) is screw-thread fit 1.2~1.6 times of maximum limit of permissible error radially.
5. eccentric lock nut according to claim 2, is characterized in that: described the second eccentric distance (e2) is screw-thread fit 0.2~0.36 times of maximum limit of permissible error radially.
6. eccentric lock nut according to claim 5, is characterized in that: described the second eccentric distance (e2) is screw-thread fit 0.24~0.32 times of maximum limit of permissible error radially.
7. eccentric 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 eccentric cone shape hole (22) are between 3~7mm.
8. eccentric lock nut according to claim 1, is characterized in that: the tapering (θ 1) of described cone boss (12) and eccentric cone shape hole (22) and the tapering (θ 2) of eccentric cone shape hole (22) are 12~20 °.
9. eccentric lock nut according to claim 1, is characterized in that: the first eccentric summit of described cone boss (12) and the second eccentric summit of eccentric cone shape hole (22) ratio of angle and 360 ° that staggers is identical with the ratio of screw-thread fit tolerance and pitch.
10. eccentric lock nut according to claim 1, is characterized in that: between the upper-end surface of described cone boss (12) and eccentric cone shape hole (22) roof, be provided with flexible gaskets (7).
CN201420098238.8U 2014-03-05 2014-03-05 Eccentric loose preventing nut Active CN203809477U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420098238.8U CN203809477U (en) 2014-03-05 2014-03-05 Eccentric loose preventing nut

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420098238.8U CN203809477U (en) 2014-03-05 2014-03-05 Eccentric loose preventing nut

Publications (1)

Publication Number Publication Date
CN203809477U true CN203809477U (en) 2014-09-03

Family

ID=51448234

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420098238.8U Active CN203809477U (en) 2014-03-05 2014-03-05 Eccentric loose preventing nut

Country Status (1)

Country Link
CN (1) CN203809477U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105114433A (en) * 2015-07-13 2015-12-02 东西方航空科技发展(宁波)有限公司 Locking nut piece
CN107740908A (en) * 2017-11-16 2018-02-27 广新海事重工股份有限公司 A kind of cupro-nickel pipe anti-corrosive apparatus
CN109268380A (en) * 2018-11-23 2019-01-25 航天精工股份有限公司 A kind of derotation is to screw-threaded coupling combination nut
CN109737130A (en) * 2019-02-27 2019-05-10 祝澎涛 The asynchronous Anti-loosening nut of mariages
CN109865950A (en) * 2017-11-27 2019-06-11 方菘岭 The guiding structure of laser spray head

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105114433A (en) * 2015-07-13 2015-12-02 东西方航空科技发展(宁波)有限公司 Locking nut piece
CN107740908A (en) * 2017-11-16 2018-02-27 广新海事重工股份有限公司 A kind of cupro-nickel pipe anti-corrosive apparatus
CN109865950A (en) * 2017-11-27 2019-06-11 方菘岭 The guiding structure of laser spray head
CN109268380A (en) * 2018-11-23 2019-01-25 航天精工股份有限公司 A kind of derotation is to screw-threaded coupling combination nut
CN109737130A (en) * 2019-02-27 2019-05-10 祝澎涛 The asynchronous Anti-loosening nut of mariages

Similar Documents

Publication Publication Date Title
CN203809477U (en) Eccentric loose preventing nut
CN203809476U (en) Eccentric self-locking stop nut
JP2011231927A (en) Concave-convex shapes on bolts and nuts to minimize bending
CN201908932U (en) Self-locking locknut assembly
CN204175767U (en) Dual anti-loosing nut external member
CN205715164U (en) Self-locking type check bolt assembly
CN201679657U (en) Equal-strength wind-power locking disc
CN200985940Y (en) Screwed connection anti-loose fastener
CN203532477U (en) Eccentric type self-locking locknut
CN102168712A (en) Anti-loosing fastening bolt assembly
CN204591951U (en) Self locking anti-loose nut
CN204512120U (en) Connect bearing pin
CN203868084U (en) Locking nut
CN202451575U (en) Bolt and nut locking set
CN105041830A (en) Locknut
CN1987134A (en) Thread connection anti-loose fastener
CN104541072A (en) Nut lock
CN210509906U (en) End face taper centering interlocking locknut external member
CN204175761U (en) A kind of finishing mill umbrella gear box flanged surface screw locking structure
CN202149125U (en) Self-locking locknut assembly
CN207261422U (en) A kind of plug screw with auto-lock function
US20110268531A1 (en) Segmented thread and connecting arrangement
CN207848136U (en) A kind of antidetonation self-locking anchor bolt
CN206458702U (en) Eccentric O-shaped self-locking nut
CN105545921A (en) Coaxial bolt set with gasket for stopping

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20170728

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 Sai Electromechanical Technology Co., Ltd