CN114542578A - Thread anti-loosening system - Google Patents
Thread anti-loosening system Download PDFInfo
- Publication number
- CN114542578A CN114542578A CN202210149813.1A CN202210149813A CN114542578A CN 114542578 A CN114542578 A CN 114542578A CN 202210149813 A CN202210149813 A CN 202210149813A CN 114542578 A CN114542578 A CN 114542578A
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- Prior art keywords
- limiting
- check ring
- stop check
- screw shaft
- thread
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- 230000002265 prevention Effects 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/282—Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
The invention discloses a thread anti-loosening system, and belongs to the field of machine manufacturing. The device comprises a screw shaft, a locking nut and a stop check ring, wherein the screw shaft can be provided with a part to be fixed; the screw thread of the screw shaft is provided with a small-modulus external spline; a thread groove matched with the thread on the screw shaft and a space capable of accommodating a stop check ring are arranged in the locking nut; a small-modulus internal spline matched with the small-modulus external spline on the screw shaft is arranged in the stop check ring, and a first limiting mechanism for limiting the circumferential movement of the stop check ring is arranged between the locking nut and the stop check ring; and the locking nut is provided with a second limiting mechanism for preventing the stop check ring from moving axially. The threads are matched with the splines, the purpose of preventing looseness is achieved through the matching between the small-modulus external splines and the internal splines, the cost is low, and the realization is easy; realize the screw through pure mechanical structure and locking, promoted stability greatly, the reliability is high.
Description
Technical Field
The invention relates to a looseness-preventing system for a mechanical part, in particular to a shafting thread looseness-preventing system, and belongs to the field of machine manufacturing.
Background
The threaded connection is a universal connection form and is widely applied to connection among various structural members. In the actual use process, when the threaded connection is applied to a moving part, looseness is easily generated due to vibration impact load, and the reliability and the stability of connection are affected. The current universal screw anti-loosening measures mainly comprise screw fastening glue, self-locking nuts, wire coiling anti-loosening and the like, but have extremely limited effect on the large-size shaft system threaded connection, and cannot play the aim of effective anti-loosening.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides a thread anti-loosening system which is good in anti-loosening effect, high in reliability and convenient to disassemble and maintain.
In order to solve the technical problem, the thread anti-loosening system provided by the invention comprises a screw shaft, a locking nut and a stop check ring, wherein the screw shaft can be provided with a component to be fixed;
the screw thread of the screw shaft is provided with a small-modulus external spline;
a thread groove matched with the thread on the screw shaft and a space capable of accommodating a stop check ring are arranged in the locking nut;
a small-modulus internal spline matched with the small-modulus external spline on the screw shaft is arranged in the stop check ring, and a first limiting mechanism for limiting the circumferential movement of the stop check ring is arranged between the locking nut and the stop check ring;
and the locking nut is provided with a second limiting mechanism for preventing the stop check ring from moving axially.
In the invention, the first limiting machine comprises a limiting boss/a limiting clamping groove arranged on the locking nut and a limiting clamping groove/a limiting boss arranged on the stop check ring and matched with the limiting boss/the limiting clamping groove on the locking nut.
In the invention, the number of the limiting bosses and the number of the limiting clamping grooves are 2, and the limiting bosses and the limiting clamping grooves are respectively and symmetrically arranged.
In the invention, the second limiting mechanism comprises a clamp spring groove and a clamp spring which are arranged on the locking nut, and the clamp spring is arranged in the clamp spring groove.
The invention provides another thread anti-loosening system which comprises a screw shaft, a locking nut and a stop check ring, wherein the screw shaft can be provided with a component to be fixed;
a thread groove matched with the thread on the screw shaft and a space capable of accommodating the stop check ring are arranged in the locking nut;
a small module internal spline is arranged in the space capable of accommodating the stop check ring, and a small module external spline matched with the small module internal spline in the space capable of accommodating the stop check ring is arranged on the outer ring of the stop check ring;
and a first limiting mechanism for preventing the stop check ring from moving in the circumferential direction is arranged between the screw shaft and the stop check ring.
And the locking nut is provided with a second limiting mechanism for preventing the stop check ring from moving axially.
In the invention, the first limiting mechanism comprises a limiting clamping groove arranged on the screw shaft and a limiting boss which is arranged on the inner ring of the stop check ring and is matched with the limiting clamping groove on the screw shaft.
In the invention, the number of the limiting bosses and the number of the limiting clamping grooves are 2, and the limiting bosses and the limiting clamping grooves are respectively and symmetrically arranged.
In the invention, the second limiting mechanism comprises a clamp spring groove and a clamp spring which are arranged on the locking nut, and the clamp spring is arranged in the clamp spring groove.
The invention has the beneficial effects that: (1) the threads are matched with the splines, circumferential anti-loosening is realized through the matching between the small-modulus external splines and the internal splines, the axial movement of the stop check ring is limited through the matching of the limiting clamp spring groove and the clamp spring, and the whole anti-loosening system is low in cost and easy to realize; the locking of the thread is realized through a pure mechanical structure, the stability is greatly improved, and the reliability is high; (2) the whole anti-loosening system is simple in structure, convenient to disassemble and maintain and low in use cost; (3) adopt 2 spacing bosss and spacing draw-in groove cooperation to carry out circumference spacing, its convenient operation, spacing effectual.
Drawings
FIG. 1 is a schematic structural view of a thread loosening prevention system;
FIG. 2 is a schematic cross-sectional view of a thread loosening prevention system;
FIG. 3 is a schematic view of a screw shaft structure;
FIG. 4 is a right side view of FIG. 3;
FIG. 5 is a schematic view of a lock nut;
FIG. 6 is a schematic view of a check ring structure;
FIG. 7 is a schematic structural view of another embodiment of a thread loosening prevention system;
FIG. 8 is an exploded view of FIG. 7;
FIG. 9 is a cross-sectional schematic view of another embodiment of a thread loosening prevention system;
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the thread anti-loosening system of the present invention includes a connected member 1, a retainer ring 2, a circlip 3, a lock nut 4, and a screw shaft 5.
As shown in figures 3 and 4, the screw shaft 5 is provided with a shaft neck 5-3 used for being installed by the connecting piece 1, the rear side of the shaft neck 5-3 is provided with a limit step 5-4, the shaft at the front side of the shaft neck 5-3 is provided with a thread 5-2, and the thread 5-2 is provided with a small-modulus external spline 5-1.
As shown in fig. 5, the lock nut 4 is provided with a conventional thread groove 4-2, and the thread groove 4-2 is configured to be matched with the thread 5-2 of the screw shaft 5. An annular step 4-4 protrudes from the outer side of the thread groove 4-2, and the inner diameter of the annular step 4-4 is larger than that of the thread groove 4-2, so that a containing space for installing the stop collar 2 is formed.
An axial limiting clamp spring groove 4-3 is arranged in the annular step 4-4, and the inner diameter of the limiting clamp spring groove 4-3 is larger than the outer diameter of the stop retainer ring 2.
When the limiting clamp spring groove 4-3 is used for being clamped into the clamp spring 3, the clamp spring 3 abuts against the stop check ring 2, and axial limiting of the stop check ring 2 is achieved.
The annular step 4-4 is internally provided with two circumferential limiting clamping grooves 4-1 which are symmetrically distributed along the circumferential direction.
As shown in fig. 6, the diameter of the stop collar 2 is slightly smaller than the inner diameter of the annular step 4-4 on the lock nut 4 to facilitate quick press-in. Two limiting bosses 2-1 are arranged on the periphery of the stop check ring 2, the positions of the limiting bosses 2-1 correspond to the positions of two limiting clamping grooves 4-1 on the annular step 4-4, and the size of the limiting bosses 2-1 is slightly smaller than that of the limiting clamping grooves 4-1.
The inner ring of the stop retainer ring 2 is provided with a small module internal spline 2-2, and the structure of the small module internal spline 2-2 is matched with a small module external spline 5-1 on the screw shaft 5.
As shown in figures 1 and 2, when the locking nut 4 and the screw shaft 5 are screwed tightly in use, the locking retainer ring 2 is pressed into the screw shaft 5 along the axial direction, the small-modulus inner spline 2-2 on the locking retainer ring 2 and the small-modulus outer spline 5-1 on the screw shaft 5 are ensured to be matched well during pressing, meanwhile, the circumferential limiting boss 2-1 on the locking retainer ring 2 is ensured to be clamped into the limiting clamping groove 4-1 on the locking nut 4, and finally, the clamping spring 3 is installed in the limiting clamping spring groove 4-3 on the locking nut 4.
In order to ensure the strength of the screw thread 5-2 on the screw shaft 5 and improve the accuracy of the spline pair and in circumferential positioning, the external spline 5-1 on the screw shaft 5 and the internal spline 2-2 on the stop collar 2 must adopt a small-modulus multi-tooth-number spline.
The size of the circumferential limiting boss 2-1 on the stop check ring 2 must be smaller than the size of the limiting clamping groove 4-1 on the locking nut 4, so that after the small-modulus internal spline 2-2 on the stop check ring 2 is matched with the small-modulus external spline 5-1 on the screw shaft 5, the circumferential limiting boss 2-1 on the stop check ring 2 can be clamped into the limiting clamping groove 4-1 on the locking nut 4.
In the embodiment, after assembly is completed, relative rotation of the stop check ring 2 and the screw shaft 5 is limited by the mutually matched spline teeth, and relative rotation of the stop check ring 2 and the lock nut 4 is limited by the mutually matched circumferential limit boss 2-1 and the limit clamping groove 4-1. The relative rotation of the screw shaft 5 and the locking nut 4 is limited, and the purpose of preventing looseness is achieved. Meanwhile, after the clamp spring 3 is clamped into the clamp spring groove 3, the clamp spring abuts against the stop check ring 2 to prevent the clamp spring from moving axially. The reliability and the stability of the whole looseness prevention of the system are ensured by a mode of combining circumferential limit and axial limit.
As shown in fig. 7 to 9, in another embodiment, the thread anti-loosening system includes a connected member 1, a retainer ring 2, a circlip 3, a lock nut 4, and a screw shaft 5. The screw shaft 5 is provided with a shaft neck 5-3 used for being installed by the connecting piece 1, the rear side of the shaft neck 5-3 is provided with a limiting step 5-4, the shaft on the front side of the shaft neck 5-3 is provided with a thread 5-2, the front end of the screw shaft 5 is provided with 2 limiting clamping grooves 4-1, and the two limiting clamping grooves 4-1 are symmetrically distributed along the circumferential direction of the screw shaft 5.
The locking nut 4 is provided with a conventional thread groove 4-2, and the structure of the thread groove 4-2 is matched with the thread 5-2 of the screw shaft 5. An annular step 4-4 protrudes from the outer side of the thread groove 4-2, and the inner diameter of the annular step 4-4 is larger than that of the thread groove 4-2, so that a containing space for installing the stop collar 2 is formed. The inner edge of the annular step 4-4 is circumferentially provided with a small-modulus internal spline 2-2.
When the locking nut 4 is screwed into the screw shaft 5, the front end of the screw shaft 5 extends into the annular step 4-4.
An axial limiting clamp spring groove 4-3 is formed in the annular step 4-4, and the inner diameter of the limiting clamp spring groove 4-3 is larger than the outer diameter of the stop check ring 2.
The limiting clamp spring groove 4-3 is used for being clamped into the clamp spring 3, and the clamp spring 3 abuts against the stop check ring 2 to achieve axial limiting of the stop check ring 2.
The diameter of the stop collar 2 is slightly smaller than the inner diameter of the annular step 4-4 on the lock nut 4 to facilitate quick press-in. Two limiting bosses 2-1 are arranged on the inner ring of the stop check ring 2, the limiting bosses 2-1 are structurally matched with 2 limiting clamping grooves 4-1 at the front end of the screw shaft 5, and the size of the limiting bosses 2-1 is slightly smaller than the limiting clamping grooves 4-1.
The outer ring of the stop retainer ring 2 is provided with a small module external spline 5-1, and the structure of the small module external spline 5-1 is matched with the small module internal spline 2-2 in the annular step 4-4.
When the locking nut 4 and the screw shaft 5 are screwed tightly, the stop check ring 2 is pressed onto the screw shaft 5 along the axial direction, the small modulus external spline 5-1 on the stop check ring 2 and the small modulus internal spline 2-2 in the annular step 4-4 are well matched during pressing, meanwhile, the circumferential limiting boss 2-1 on the stop check ring 2 is clamped into the front end limiting clamping groove 4-1 of the screw shaft 5, and finally the clamp spring 3 is installed into the limiting clamp spring groove 4-3 on the locking nut 4.
In order to ensure the strength of the thread 5-2 on the screw shaft 5 and improve the accuracy of the spline pair and in circumferential positioning, the small-module external spline 5-1 on the stop retainer 2 and the small-module internal spline 2-2 in the annular step 4-4 in the embodiment must adopt a small-module multi-tooth-number spline.
The size of the circumferential limiting boss 2-1 on the stop check ring 2 must be smaller than the size of the limiting clamping groove 4-1 at the front end of the screw shaft 5, so that after the small-modulus external spline 5-1 on the stop check ring 2 and the small-modulus internal spline 2-2 in the annular step 4-4 are matched, the circumferential limiting boss 2-1 on the stop check ring 2 can be quickly clamped into the limiting clamping groove 4-1 at the front end of the screw shaft 5.
In the embodiment, after assembly is completed, relative rotation of the stop check ring 2 and the screw shaft 5 is limited by the spline teeth which are matched with each other, and relative rotation of the stop check ring 2 and the lock nut 4 is limited by the circumferential limiting boss 2-1 and the limiting clamping groove 4-1 which are matched with each other. The relative rotation of the screw shaft 5 and the locking nut 4 is limited, and the purpose of preventing looseness is achieved. Meanwhile, the snap spring 3 is clamped in the snap spring groove 4-3 and then abuts against the stop check ring 2 to prevent the axial movement of the stop check ring. The reliability and the stability of the whole looseness prevention of the system are ensured by a mode of combining circumferential limit and axial limit.
While the present invention provides a thread anti-loosening system, and a number of ways to implement the same, it is to be understood that the foregoing is merely a preferred embodiment of the present invention, and that various modifications and alterations can be made by those skilled in the art without departing from the principles of the present invention, and should be considered as within the scope of the present invention. All the components not specified in the present embodiment can be realized by the prior art.
Claims (8)
1. A thread loosening prevention system, comprising: the screw shaft can be provided with a component to be fixed, the locking nut and the stop check ring;
a small-modulus external spline is arranged on the thread of the screw shaft;
a thread groove matched with the thread on the screw shaft and a space capable of accommodating a stop check ring are arranged in the locking nut;
a small-modulus internal spline matched with the small-modulus external spline on the screw shaft is arranged in the stop check ring, and a first limiting mechanism for limiting the circumferential movement of the stop check ring is arranged between the locking nut and the stop check ring;
and the locking nut is provided with a second limiting mechanism for preventing the stop check ring from moving axially.
2. The thread loosening prevention system of claim 1, wherein: the first limiting machine comprises a limiting boss/a limiting clamping groove arranged on the locking nut and a limiting clamping groove/a limiting boss arranged on the stop check ring and matched with the limiting boss/the limiting clamping groove on the locking nut.
3. The thread loosening prevention system of claim 3, wherein: the number of the limiting bosses and the number of the limiting clamping grooves are 2, and the limiting bosses and the limiting clamping grooves are symmetrically arranged respectively.
4. A thread anti-loosening system according to any of claims 1 to 4, wherein: the second limiting mechanism comprises a clamp spring groove and a clamp spring which are arranged on the locking nut, and the clamp spring is arranged in the clamp spring groove.
5. A thread loosening prevention system, comprising: the device comprises a screw shaft, a locking nut and a stop check ring, wherein the screw shaft can be provided with a part to be fixed;
a thread groove matched with the thread on the screw shaft and a space capable of accommodating the stop check ring are arranged in the locking nut;
a small module internal spline is arranged in the space capable of accommodating the stop check ring, and a small module external spline matched with the small module internal spline in the space capable of accommodating the stop check ring is arranged on the outer ring of the stop check ring;
a first limiting mechanism for preventing the stop check ring from moving circumferentially is arranged between the screw shaft and the stop check ring;
and the locking nut is provided with a second limiting mechanism for preventing the stop check ring from moving axially.
6. The thread loosening prevention system of claim 5, wherein: the first limiting mechanism comprises a limiting clamping groove arranged on the screw shaft and a limiting boss which is arranged on an inner ring of the stop check ring and is matched with the limiting clamping groove on the screw shaft.
7. The thread loosening prevention system of claim 6, wherein: the number of the limiting bosses and the number of the limiting clamping grooves are 2, and the limiting bosses and the limiting clamping grooves are symmetrically arranged respectively.
8. A thread anti-loosening system according to any of claims 5 to 7, wherein: the second limiting mechanism comprises a clamp spring groove and a clamp spring which are arranged on the locking nut, and the clamp spring is arranged in the clamp spring groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210149813.1A CN114542578A (en) | 2022-02-18 | 2022-02-18 | Thread anti-loosening system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210149813.1A CN114542578A (en) | 2022-02-18 | 2022-02-18 | Thread anti-loosening system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114542578A true CN114542578A (en) | 2022-05-27 |
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ID=81675460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210149813.1A Pending CN114542578A (en) | 2022-02-18 | 2022-02-18 | Thread anti-loosening system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114542578A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202484042U (en) * | 2012-03-16 | 2012-10-10 | 中国航空动力机械研究所 | Anti-loosing assembly for shafts and reducer containing assembly |
| 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 |
| CN105003549A (en) * | 2015-06-18 | 2015-10-28 | 中国北方车辆研究所 | Compact locking and looseness-preventing device and dismantling tool thereof |
| CN106560635A (en) * | 2015-09-28 | 2017-04-12 | 中航商用航空发动机有限责任公司 | Locking device, rotator, power equipment and locking device design method |
| US20170102023A1 (en) * | 2015-10-13 | 2017-04-13 | Sps Technologies, Llc | Locknut assembly |
| 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 |
-
2022
- 2022-02-18 CN CN202210149813.1A patent/CN114542578A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202484042U (en) * | 2012-03-16 | 2012-10-10 | 中国航空动力机械研究所 | Anti-loosing assembly for shafts and reducer containing assembly |
| 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 |
| CN105003549A (en) * | 2015-06-18 | 2015-10-28 | 中国北方车辆研究所 | Compact locking and looseness-preventing device and dismantling tool thereof |
| CN106560635A (en) * | 2015-09-28 | 2017-04-12 | 中航商用航空发动机有限责任公司 | Locking device, rotator, power equipment and locking device design method |
| US20170102023A1 (en) * | 2015-10-13 | 2017-04-13 | Sps Technologies, Llc | Locknut assembly |
| 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 |
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Application publication date: 20220527 |
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