CN112211892A - Fastener capable of preventing loosening - Google Patents
Fastener capable of preventing loosening Download PDFInfo
- Publication number
- CN112211892A CN112211892A CN202011139787.1A CN202011139787A CN112211892A CN 112211892 A CN112211892 A CN 112211892A CN 202011139787 A CN202011139787 A CN 202011139787A CN 112211892 A CN112211892 A CN 112211892A
- Authority
- CN
- China
- Prior art keywords
- screw
- washer
- inner groove
- cushion block
- loosening
- 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
Links
- 230000002265 prevention Effects 0.000 claims abstract description 3
- 238000000926 separation method Methods 0.000 claims abstract description 3
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Images
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
- F16B39/284—Locking by means of elastic deformation
-
- 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
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention discloses a loosening-preventing fastener which comprises a screw, a washer sleeved on the screw and a nut in threaded connection with the screw, wherein the washer is sleeved on the screw; the screw rod is provided with an inner groove with a certain length along the axial direction, and the wall of the screw rod which surrounds the outer part of the inner groove is at least separated into two sections in the radial direction; a cushion block connected with the gasket into a whole is arranged in the middle of the gasket, and a space capable of accommodating the screw rod wall to pass through is reserved when the cushion block and the gasket are connected into a whole; the cushion block extends along the central axis direction of the washer to have a certain length, and when the washer is sleeved on the screw rod, the cushion block is inserted into the inner groove of the bolt from the tail part of the screw rod along with the washer to prop open the inner groove at the separation part. According to the anti-loosening fastener provided by the invention, when the washer is sleeved on the screw, and the screw is sleeved with the nut again for tightening, the cushion block can be used for expanding the tail part of the wall of the screw with a plurality of separated pieces, so that the outer diameter of the tail part of the screw is larger than that of the front end, the nut is difficult to move towards the tail end of the screw, the purpose of loosening prevention of the nut is achieved, and the tight connection of the fastener is ensured.
Description
Technical Field
The present invention relates to a fastener.
Background
The fastener is widely used, but due to factors such as vibration existing in a use environment, the nut can be loosened, the connection with the bolt is not tight, and the fastening effect is lost. In response to this phenomenon, many solutions have been proposed in the prior art, each having advantages and disadvantages.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a fastener capable of preventing loosening, which can better prevent the loosening of a nut.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a fastener for preventing looseness comprises a screw, a washer sleeved on the screw and a nut in threaded connection with the screw;
the screw rod is provided with an inner groove with a certain length along the axial direction, and the wall of the screw rod which surrounds the outer part of the inner groove is at least separated into two sections in the radial direction;
a cushion block connected with the gasket into a whole is arranged in the middle of the gasket, and a space capable of accommodating the screw rod wall to pass through is reserved when the cushion block and the gasket are connected into a whole; the cushion block extends along the central axis direction of the washer to have a certain length, and when the washer is sleeved on the screw rod, the cushion block is inserted into the inner groove of the bolt from the tail part of the screw rod along with the washer to prop open the inner groove at the separation part.
Furthermore, a plurality of grooves or internal threads are arranged on the side wall of the screw inner groove.
Furthermore, the outer surface of the cushion block is provided with a plurality of bulges or external threads which are matched with the grooves or internal threads on the side wall of the internal groove of the screw rod.
Furthermore, the inner groove is cylindrical, and the screw wall outside the inner groove is a discontinuous ring body and is uniformly divided into a plurality of lobes along the circumferential direction.
Further, the inner groove is a cutting groove with a certain width formed by directly cutting the screw rod along the radial direction, the cutting groove has a certain length along the axial direction, and the screw rod wall is separated into two pieces by the cutting groove.
Furthermore, the cushion block is a circular truncated cone, and the diameter of the connecting end connected with the gasket is smaller than that of the free end of the tail end.
Furthermore, the diameter of the free end of the tail end of the cushion block is larger than the diameter or the width of the inner groove on the screw rod, so that the inner groove can be expanded when the cushion block is inserted into the inner groove.
Furthermore, the cushion block is a trapezoid body matched with the shape and the width of the cutting groove, and the width of the connecting end connected with the gasket is smaller than that of the outer free end.
Furthermore, the width of the free end of the tail end of the cushion block is larger than that of the cutting groove on the screw rod, so that the inner groove can be expanded when the cushion block is inserted into the inner groove.
The invention achieves the following beneficial effects:
according to the anti-loosening fastener provided by the invention, when the washer is sleeved on the screw, and the screw is sleeved with the nut again for tightening, the cushion block is inserted into the inner groove of the bolt from the tail part of the screw along with the washer, the tail part of the wall of the screw with several separated sections is expanded, so that the outer diameter of the tail part of the screw is larger than that of the front end, and the nut is limited by the tail end of the screw, which is larger than the diameter of the front end, in the vibration process, and is difficult to move towards the tail end of the screw, so that the anti-loosening purpose of the nut is achieved. The mode can produce unexpected technical effects without increasing components and only improving the structure of the components.
Drawings
FIG. 1 is a schematic view of a fastener in use according to the present embodiment;
FIG. 2 is a schematic view of the fastener assembly of the present embodiment;
FIG. 3 is a schematic view of the screw of FIG. 2;
fig. 4 is a schematic view of the gasket of fig. 2.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 4, the loosening prevention fastener of the present embodiment includes a screw 1 (or a bolt having a screw), a washer 2 fitted over the screw, and a nut 3 threadedly coupled to the screw.
The screw 1 is provided with an inner groove 11 of a certain length in the axial direction, and the screw wall surrounding the outside of the inner groove is divided into at least two pieces in the radial direction, as shown in fig. 3.
The inner groove 11 may be in the shape of a cylinder, that is, the screw wall outside the inner groove is a discontinuous circular ring body, and is uniformly divided into two, three or four petals and other multiple petals along the circumferential direction.
The inner groove 11 may be a slit groove of a predetermined width formed by directly cutting the screw in the radial direction, the slit groove having a predetermined length in the axial direction, and the screw wall being divided into two pieces by the slit groove.
The side walls of the inner tank 11 are provided with a plurality of grooves or internal threads 111.
The middle of the gasket 2 is provided with a cushion block 21 which is connected with the gasket into a whole, as shown in fig. 4, and a space for accommodating a screw wall to pass through is reserved when the cushion block 21 is connected with the gasket into a whole. The spacer 21 extends along the central axis of the washer to a certain length, and when the washer 2 is fitted on the wall of the screw 1, the spacer 21 is inserted into the inner groove 11 of the bolt from the tail of the screw along with the washer 1.
The cushion block 21 may be a truncated cone, and the diameter of the connecting end connected with the washer is smaller than that of the free end of the tail end. The diameter of the free end of the tail end of the cushion block is larger than that of the cylinder on the screw rod, so that the inner groove can be expanded when the cushion block is inserted into the inner groove.
The spacer 21 may also be a trapezoidal body matching the width of the slot, and the width of the connecting end connected with the gasket is smaller than that of the outer free end. The width of the free end of the tail end of the cushion block is larger than that of the cutting groove on the screw rod, so that the inner groove can be opened when the cushion block is inserted into the inner groove.
The outer surface of the cushion block 21 is designed with a plurality of protrusions 211 or external threads which are matched with the grooves or internal threads 111 on the side wall of the screw inner groove 11, so that the purpose of preventing the gasket and the screw from moving relatively is further achieved.
As shown in fig. 1 and 2, when the plate a and the plate B need to be fastened, the screw 1 penetrates through the plate a and the plate B, the bottom end of the screw 1 can be screwed against the plate B by a nut (or a bolt with the screw 11 is directly adopted to reduce the screwing step of the nut), the washer 2 is sleeved on the screw 1, and the screw 1 is sleeved with the nut 3 for screwing, the cushion block 21 is inserted into the inner groove 11 from the tail part of the screw 1 along with the washer, the tail part of the separated screw walls is expanded, the outer diameter of the tail part of the screw is larger than that of the front end, the nut 3 is limited by the tail end of the screw larger than the diameter of the front end in the vibration process, the nut is difficult to move towards the tail end of the screw, the anti-loose purpose of the nut is achieved, and the.
The screw, the nut and the washer can be made of metal materials, and can also be made of other materials such as plastics.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A fastener for preventing looseness is characterized by comprising a screw, a washer sleeved on the screw and a nut in threaded connection with the screw;
the screw rod is provided with an inner groove with a certain length along the axial direction, and the wall of the screw rod which surrounds the outer part of the inner groove is at least separated into two sections in the radial direction;
a cushion block connected with the gasket into a whole is arranged in the middle of the gasket, and a space capable of accommodating the screw rod wall to pass through is reserved when the cushion block and the gasket are connected into a whole; the cushion block extends along the central axis direction of the washer to have a certain length, and when the washer is sleeved on the screw rod, the cushion block is inserted into the inner groove of the bolt from the tail part of the screw rod along with the washer to prop open the inner groove at the separation part.
2. The anti-loosening fastener according to claim 1, wherein the inner groove of the shank has a plurality of grooves or internal threads formed in a side wall thereof.
3. A loosening prevention fastener as claimed in claim 1 or claim 2, wherein the spacer has a plurality of projections or external threads on its outer surface for engaging with recesses or internal threads in the side walls of the internal groove in the shank.
4. The anti-loosening fastener according to claim 1, wherein the inner groove has a cylindrical shape, and the wall of the shank outside the inner groove is a discontinuous torus and is uniformly divided into multiple lobes in the circumferential direction.
5. The anti-loosening fastener according to claim 1, wherein the internal groove is a slit having a predetermined width formed by directly cutting the shank in a radial direction, the slit having a predetermined length in an axial direction, and the wall of the shank is divided into two pieces by the cut slit.
6. A fastener against loosening as claimed in claim 4 or 5, wherein the spacer is frustoconical and the diameter of the connecting end to which the washer is connected is smaller than the diameter of the free end of the trailing end.
7. A loosening-prevention fastener as claimed in claim 4 or claim 5, wherein the free end of the tail end of the spacer has a diameter greater than the diameter or width of the internal groove in the shank, so that the spacer, when inserted into the internal groove, spreads the internal groove apart.
8. The anti-loosening fastener according to claim 5, wherein the spacer is a trapezoidal body having a width corresponding to the shape of the slot, and the width of the connecting end connected to the washer is smaller than the width of the outer free end.
9. The anti-loosening fastener according to claim 5, wherein the free end of the rear end of the spacer has a width greater than the width of the slot in the shank so that the spacer is inserted into the internal groove to spread the internal groove apart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011139787.1A CN112211892A (en) | 2020-10-22 | 2020-10-22 | Fastener capable of preventing loosening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011139787.1A CN112211892A (en) | 2020-10-22 | 2020-10-22 | Fastener capable of preventing loosening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112211892A true CN112211892A (en) | 2021-01-12 |
Family
ID=74054856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011139787.1A Pending CN112211892A (en) | 2020-10-22 | 2020-10-22 | Fastener capable of preventing loosening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112211892A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120137841A1 (en) * | 2010-12-02 | 2012-06-07 | Harris Corporation | Press-set threaded screws and 2 stroke air tool for installation |
| CN104482023A (en) * | 2014-12-07 | 2015-04-01 | 泉州市永茂电子科技有限公司 | Screw rod, expansion rod and anti-loosening bolt available for strong-shock environments or mining machinery |
| CN204739061U (en) * | 2015-07-09 | 2015-11-04 | 浙江上锚建筑科技有限公司 | From expanding end self tapping type crab -bolt |
| CN106015265A (en) * | 2016-06-03 | 2016-10-12 | 河南科技大学 | Internal screw for check bolt, and check bolt assembly |
| CN210637345U (en) * | 2019-05-21 | 2020-05-29 | 王艳宜 | Screw rod structure of mining machinery |
| CN211648755U (en) * | 2020-02-28 | 2020-10-09 | 陕西省地方电力(集团)有限公司延安供电分公司 | Novel anti-theft bolt |
-
2020
- 2020-10-22 CN CN202011139787.1A patent/CN112211892A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120137841A1 (en) * | 2010-12-02 | 2012-06-07 | Harris Corporation | Press-set threaded screws and 2 stroke air tool for installation |
| CN104482023A (en) * | 2014-12-07 | 2015-04-01 | 泉州市永茂电子科技有限公司 | Screw rod, expansion rod and anti-loosening bolt available for strong-shock environments or mining machinery |
| CN204739061U (en) * | 2015-07-09 | 2015-11-04 | 浙江上锚建筑科技有限公司 | From expanding end self tapping type crab -bolt |
| CN106015265A (en) * | 2016-06-03 | 2016-10-12 | 河南科技大学 | Internal screw for check bolt, and check bolt assembly |
| CN210637345U (en) * | 2019-05-21 | 2020-05-29 | 王艳宜 | Screw rod structure of mining machinery |
| CN211648755U (en) * | 2020-02-28 | 2020-10-09 | 陕西省地方电力(集团)有限公司延安供电分公司 | Novel anti-theft bolt |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210112 |
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| RJ01 | Rejection of invention patent application after publication |