CN111577739A - Locking nut anti-loosening device - Google Patents

Locking nut anti-loosening device Download PDF

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Publication number
CN111577739A
CN111577739A CN202010476558.2A CN202010476558A CN111577739A CN 111577739 A CN111577739 A CN 111577739A CN 202010476558 A CN202010476558 A CN 202010476558A CN 111577739 A CN111577739 A CN 111577739A
Authority
CN
China
Prior art keywords
stop pin
stop
bearing
groove
locking nut
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.)
Pending
Application number
CN202010476558.2A
Other languages
Chinese (zh)
Inventor
朱卓宇
宋益明
杨爱华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Aviation Powerplant Research Institute AECC
Original Assignee
Hunan Aviation Powerplant Research Institute AECC
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 Hunan Aviation Powerplant Research Institute AECC filed Critical Hunan Aviation Powerplant Research Institute AECC
Priority to CN202010476558.2A priority Critical patent/CN111577739A/en
Publication of CN111577739A publication Critical patent/CN111577739A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00Locking of screws, bolts or nuts
    • F16B39/02Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/04Locking of screws, bolts or nuts in which the locking takes place after screwing down with a member penetrating the screw-threaded surface of at least one part, e.g. a pin, a wedge, cotter-pin, screw
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/0018Shaft assemblies for gearings
    • F16H57/0025Shaft assemblies for gearings with gearing elements rigidly connected to a shaft, e.g. securing gears or pulleys by specially adapted splines, keys or methods

Abstract

The invention provides a locknut anti-loosening device, comprising: a rotating shaft having a surface with a plurality of first stopper pin holes; a bearing mounted on the rotating shaft; the locking nut is sleeved on the rotating shaft and abutted against the bearing, a groove is formed in the outer surface of the locking nut, and a plurality of second stop pin holes are formed in the groove; and the outer stop ring is sleeved on the groove, one end of the outer stop ring is provided with a stop pin, and the stop pin is inserted into the first stop pin hole and the second stop pin hole simultaneously. The locknut anti-loosening device has the advantages of simple structure, convenience in assembly, low operation strength, less time consumption, no limitation of the mounting position of the locknut on the shaft, repeated use of the stop ring, and good mounting and dismounting manufacturability.

Description

Locking nut anti-loosening device
Technical Field
The invention relates to the field of bearings, in particular to a locknut anti-loosening device.
Background
The locking nut anti-loosening device commonly used at present mainly performs locking of the locking nut through a cotter pin and a stop washer.
The split pin is formed by drilling holes on the locking nut and the shaft end journal along the circumferential direction, when the locking nut is screwed down, a pair of holes aligned with the split pin holes on the locking nut and the shaft are found, and then the split pin is inserted and bent to play a role in preventing the locking nut from loosening.
The stop washer is a washer which prevents the locking nut from loosening by utilizing the matching of the stop lug, the locking nut slot and the key slot of the shaft.
The two common locknut anti-loosening devices have certain defects, wherein the split pin only needs to penetrate through the shaft and the locknut when being installed and is only suitable for the anti-loosening of the locknut at the shaft end part due to the bending requirement, and when the locknut is positioned in the middle of the shaft, the split pin is very difficult to install; when the stop washer is anti-loose, a stop key groove needs to be processed on the shaft, and the key groove can greatly reduce the strength of the shaft.
It is noted that the information disclosed in the foregoing background section is only for enhancement of background understanding of the invention and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a locknut anti-loosening device which is simple in structure, convenient to assemble and not limited by an installation position, aiming at the defects of the prior art.
In order to achieve the purpose, the invention adopts the following scheme:
a lock nut anti-loosening device comprising:
a rotating shaft having a surface with a plurality of first stopper pin holes;
a bearing mounted on the rotating shaft;
the locking nut is sleeved on the rotating shaft and abutted against the bearing, a groove is formed in the outer surface of the locking nut, and a plurality of second stop pin holes are formed in the groove; and
an outer stop ring, the outer stop ring is sleeved on the groove,
and one end of the outer stop ring is provided with a stop pin, and the stop pin is inserted into the first stop pin hole and the second stop pin hole simultaneously.
In some embodiments, the lock nut is threadedly coupled to the rotating shaft.
In some embodiments, the groove encircles the lock nut for a circumference.
In some embodiments, the first plurality of stop pin holes and the second plurality of stop pin holes are partially aligned.
In some embodiments, the number of the first plurality of stop pin holes is different from the number of the second plurality of stop pin holes.
In some embodiments, the outer stop ring is a ring having a notch, and the stop pin is disposed on one side end of the notch.
In some embodiments, the direction of the retaining pin is from the side end toward the center of the outer retaining ring.
In some embodiments, the groove has a width equal to a width of the outer snap ring.
In some embodiments, the stop pin has a diameter that is the same as the diameter of the plurality of first stop pin holes and the plurality of second stop pin holes.
In some embodiments, the depth of the stop pin inserted into the first stop pin hole is 3-5 mm.
The locknut anti-loosening device has the advantages of simple structure, convenience in assembly, low operation strength, less time consumption, no limitation of the mounting position of the locknut on the shaft, repeated use of the stop ring, and good mounting and dismounting manufacturability.
Drawings
FIG. 1 is a schematic structural view of a locknut anti-loosening apparatus of the present invention;
FIG. 2 is an assembled schematic view of the locknut anti-loosening apparatus of the present invention;
fig. 3 is a schematic view of the depth dimension of the pin hole in the locknut looseness prevention apparatus of the present invention.
Wherein the reference numerals are as follows:
1: rotating shaft
2: bearing assembly
3: external stop ring
4: locking nut
5: stop pin
6: locking nut groove
7: second stop pin hole
8: first stop pin hole
Detailed Description
The technical solution of the present invention is further explained below according to specific embodiments. The scope of protection of the invention is not limited to the following examples, which are set forth for illustrative purposes only and are not intended to limit the invention in any way.
All features disclosed in this invention may be combined in any combination and such combinations are understood to be disclosed or described herein unless a person skilled in the art would consider such combinations to be clearly unreasonable. The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
Fig. 1 is a schematic structural view of a locknut looseness prevention apparatus of the present invention, and as shown in fig. 1, the locknut looseness prevention apparatus of the present invention includes a rotating shaft 1, a bearing 2, an outer snap ring 3, and a locknut 4.
The rotating shaft 1 is a cylindrical structure and comprises a shaft neck and a shaft body, and the diameter of the shaft neck is slightly smaller than the shaft body.
The bearing 2 is a sleeve-shaped structure, and is mounted on the journal of the rotating shaft 1 and preferably abuts against the boundary between the journal and the shaft body to avoid sliding on the rotating shaft 1 in the direction of the shaft body.
The locking nut 4 is sleeved on the rotating shaft 1 and is abutted against the bearing 2 to prevent the bearing 2 from sliding on the rotating shaft 1 towards the direction of the shaft neck, namely the locking nut 4 is usually arranged at the other side of the shaft neck, and the locking nut 4 clamps the bearing 2 in the middle together with the junction of the shaft neck and the shaft body. The locking nut 4 is preferably screwed to the rotary shaft 1, and axially presses the bearing 2.
The outer stop ring 3 is sleeved on the locking nut 4, fixes the locking nut 4 and the shaft neck of the rotating shaft 1 together, plays a role in preventing the locking nut 4 from loosening, and prevents the locking nut 4 from falling off during axial movement or rotation.
Fig. 2 is an assembly view showing the locknut looseness prevention apparatus of the present invention, and as shown in fig. 2, the surface of the rotating shaft 1 is uniformly distributed along the circumference with a plurality of first stop pin holes 8, and the first stop pin holes 8 are generally disposed at the journal positions of the rotating shaft 1.
The outer surface of the locking nut 4 is provided with a groove 6, and a plurality of second stop pin holes 7 are uniformly distributed on the groove 6 along the circumference so as to be matched with the first stop pin holes 8.
The outer stop ring is sleeved on the groove 6, and one end of the outer stop ring is provided with a stop pin 5.
The groove 6 surrounds the lock nut 4 for one revolution, and the width of the groove 6 is equal to or greater than the width of the outer snap ring 3 to accommodate the outer snap ring 3, and preferably equal to each other so as to prevent the outer snap ring 3 from moving in the groove 6.
The number of the first stop pin holes and the number of the second stop pin holes can be different, for example, the number of the stop pin holes on the locking nut 4 and the shaft neck of the rotating shaft 1 can be combined by 8 holes to 9 holes or other combinations, so that at least one pair of stop pin holes can be simultaneously exposed at any relative position between the locking nut 4 and the rotating shaft 1, and the stop pin 5 of the outer stop ring 3 can be selectively inserted and fixed through the exposed stop pin holes at any time.
By adjusting the position of the locking nut 4 relative to the axis of rotation 1, at least part of the first and second stop pin holes 8, 7 can be aligned.
The outer snap ring 3 is a circular ring having a notch, the stop pin 5 is disposed on one side end of the notch, and the direction of the stop pin 5 is directed from the side end toward the center of the outer snap ring 3, i.e., disposed inward.
When the outer stop ring 3 is reversely buckled in the groove 6 of the outer circle of the locking nut 4, the stop pin 5 can be simultaneously inserted into a certain pair of the first stop pin hole 8 and the second stop pin hole 7 which are aligned or aligned, so that the locking effect on the locking nut 4 is achieved. Meanwhile, the outer stop ring 3 is tightly held on the groove 6 of the excircle of the lock nut 4 by utilizing the stretching effect of the groove 6 on the lock nut 4 to the outer stop ring 3, so that the outer stop ring is prevented from falling off when moving axially or rotating.
The diameter of the stop pin 5 is preferably the same as the diameter of the first stop pin holes 8 and the second stop pin holes 7, which can achieve better fixing effect.
When the groove 6 of the outer stop ring 3 and the lock nut 4 is designed, the tensile rate of the outer stop ring 3 can be designed according to the relevant dimensions of GB/T895.2-1986, the holding effect of the assembled stop ring is ensured, and the stop ring is not easy to fall off.
Fig. 3 is a schematic view of the depth dimension of a pin hole in the locknut anti-loosening device of the present invention, as shown in fig. 3, the depth of the stop pin inserted into the first stop pin hole is 3-5 mm, and if too shallow, an ideal fixing effect cannot be achieved, and if too deep, it is inconvenient for the outer stop ring to be installed and detached.
The invention meets the use requirement through three-dimensional simulation assembly and analysis.
In conclusion, the locknut anti-loosening device has the advantages of simple structure, convenience in assembly, low operation intensity and less time consumption, can effectively avoid the defects of the locknut anti-loosening device in the prior art in use, is not limited by the mounting position of the locknut on the shaft, and meanwhile, the stop ring can be repeatedly used for many times and has good mounting and dismounting manufacturability.
It should be noted by those skilled in the art that the described embodiments of the present invention are merely exemplary and that various other substitutions, alterations, and modifications may be made within the scope of the present invention. Accordingly, the present invention is not limited to the above-described embodiments, but is only limited by the claims.

Claims (10)

1. A locknut anti-loosening device, comprising:
a rotating shaft having a surface with a plurality of first stopper pin holes;
a bearing mounted on the rotating shaft;
the locking nut is sleeved on the rotating shaft and abutted against the bearing, a groove is formed in the outer surface of the locking nut, and a plurality of second stop pin holes are formed in the groove; and
an outer stop ring, the outer stop ring is sleeved on the groove,
and one end of the outer stop ring is provided with a stop pin, and the stop pin is inserted into the first stop pin hole and the second stop pin hole simultaneously.
2. The bearing hold-down anti-loosening device according to claim 1, wherein the lock nut is threadedly coupled to the rotating shaft.
3. The bearing hold down anti-loosening device of claim 1, wherein the groove encircles the lock nut for one revolution.
4. The bearing compression anti-loosening apparatus of claim 1, wherein the first plurality of stop pin holes and the second plurality of stop pin holes are partially aligned.
5. The bearing compression anti-loosening apparatus of claim 1, wherein the number of the first plurality of stop pin holes is different from the number of the second plurality of stop pin holes.
6. The bearing hold-down anti-loosening device according to claim 1, wherein the outer stop ring is a circular ring having a notch, and the stop pin is disposed on one side end of the notch.
7. The bearing compression anti-loosening device of claim 6, wherein the direction of the stop pin is from the side end to the center of the outer stop ring.
8. The bearing hold down anti-loosening device of claim 1, wherein the width of the groove is equal to the width of the outer snap ring.
9. The bearing hold down anti-loosening device of claim 1, wherein the stop pin has a diameter that is the same as the diameter of the first and second plurality of stop pin holes.
10. The bearing pressing and loosening prevention device as claimed in claim 1, wherein the depth of the stop pin inserted into the first stop pin hole is 3-5 mm.
CN202010476558.2A 2020-05-29 2020-05-29 Locking nut anti-loosening device Pending CN111577739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010476558.2A CN111577739A (en) 2020-05-29 2020-05-29 Locking nut anti-loosening device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010476558.2A CN111577739A (en) 2020-05-29 2020-05-29 Locking nut anti-loosening device

Publications (1)

Publication Number Publication Date
CN111577739A true CN111577739A (en) 2020-08-25

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Application Number Title Priority Date Filing Date
CN202010476558.2A Pending CN111577739A (en) 2020-05-29 2020-05-29 Locking nut anti-loosening device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111810543A (en) * 2020-06-24 2020-10-23 中国航发哈尔滨轴承有限公司 Locking and positioning structure for parts on shaft

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB224207A (en) * 1923-10-29 1925-07-02 Innovations Mecaniques Soc Improvements in or relating to nut locks
CN203571000U (en) * 2013-11-04 2014-04-30 中国南方航空工业(集团)有限公司 Connecting and fixing structure of gear and bearing
CN104358788A (en) * 2014-10-31 2015-02-18 宁波星箭航天机械有限公司 Device for locking high-speed bearing
CN204985230U (en) * 2015-04-24 2016-01-20 江西洪都航空工业集团有限责任公司 Quick -release stop pin
CN205908657U (en) * 2016-05-30 2017-01-25 宜昌常丰港机制造有限公司 Bearing axle clearance adjusts locking device
CN110056578A (en) * 2019-05-10 2019-07-26 中国航发湖南动力机械研究所 Bearing compresses locking device
CN110792697A (en) * 2019-10-10 2020-02-14 一汽解放汽车有限公司 Shaft head nut locking structure and assembling method thereof
CN210265453U (en) * 2019-05-13 2020-04-07 杨富云 Locking device for bolt and nut

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB224207A (en) * 1923-10-29 1925-07-02 Innovations Mecaniques Soc Improvements in or relating to nut locks
CN203571000U (en) * 2013-11-04 2014-04-30 中国南方航空工业(集团)有限公司 Connecting and fixing structure of gear and bearing
CN104358788A (en) * 2014-10-31 2015-02-18 宁波星箭航天机械有限公司 Device for locking high-speed bearing
CN204985230U (en) * 2015-04-24 2016-01-20 江西洪都航空工业集团有限责任公司 Quick -release stop pin
CN205908657U (en) * 2016-05-30 2017-01-25 宜昌常丰港机制造有限公司 Bearing axle clearance adjusts locking device
CN110056578A (en) * 2019-05-10 2019-07-26 中国航发湖南动力机械研究所 Bearing compresses locking device
CN210265453U (en) * 2019-05-13 2020-04-07 杨富云 Locking device for bolt and nut
CN110792697A (en) * 2019-10-10 2020-02-14 一汽解放汽车有限公司 Shaft head nut locking structure and assembling method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111810543A (en) * 2020-06-24 2020-10-23 中国航发哈尔滨轴承有限公司 Locking and positioning structure for parts on shaft

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Application publication date: 20200825

RJ01 Rejection of invention patent application after publication